WO2014129493A1

WO2014129493A1 - Mechanically operated chemical solution suction device

Info

Publication number: WO2014129493A1
Application number: PCT/JP2014/053890
Authority: WO
Inventors: 根本　茂; 稔植木
Original assignee: 株式会社根本杏林堂; 植木医科工業株式会社
Priority date: 2013-02-20
Filing date: 2014-02-19
Publication date: 2014-08-28
Also published as: JP6313743B2; JPWO2014129493A1

Abstract

This chemical solution suction device (1) is provided with a piston holding mechanism (20) which holds a piston member (7), and with a cylinder holding mechanism (30) which holds a cylinder member (6). The piston holding mechanism (20) and the cylinder holding mechanism (30) are configured so as to be capable of moving such that the piston holding mechanism (20) and the cylinder holding mechanism (30) approach and separate from each other. Also, the chemical solution suction device (1) is provided with a pressing mechanism (50) which applies pressing force to either the piston holding mechanism (20) and/or the cylinder holding mechanism (30), thereby moving one of the piston holding mechanism (20) and the cylinder holding mechanism (30) from (i) a first state in which the piston holding mechanism (20) and the cylinder holding mechanism (30) are located close to each other to (ii) a second state in which both the mechanisms (20, 30) are separated from each other by a predetermined distance.

Description

Mechanical chemical suction device

The present invention relates to a chemical solution suction device for sucking a chemical solution from a bottle or bag into a syringe, and in particular, a mechanical chemical solution that can be used without a power source and can suck a chemical solution at a predetermined speed. The present invention relates to a suction device.

At present, CT (Computed Tomography) scanners, MRI (Magnetic Resonance Imaging) devices, PET (Positron Emission Tomography) devices, and DSA (Angiographic devices, Digital Subtraction) are known as medical diagnostic imaging devices. . When such an imaging apparatus is used, a contrast medium, physiological saline, or the like (hereinafter simply referred to as “medical solution”) may be injected into the patient. Various proposals have been made.

In addition, in terms of a chemical syringe, a prefilled chemical solution is called a prefilled syringe or the like. On the other hand, in a facility such as a hospital, a chemical solution may be sucked into an empty syringe and used. As an apparatus for sucking a chemical solution from a bottle or bag into a syringe, an automatic suction apparatus using a motor or the like as in Patent Document 1 as a drive source is conventionally known.

JP 2000-189515 A

By the way, in addition to the automatic suction device as described in the cited document 1, it is also assumed that in a facility such as a hospital, a mechanical chemical solution suction device that manually sucks a chemical solution by a user operation is used. However, among such mechanical chemical liquid suction devices, the speed of pulling the piston member of the syringe changes depending on the user's operation, and the speed at which the chemical liquid is sucked may be considered. And when a suction speed is too high, there exists a possibility that a bubble may mix in a chemical | medical solution.

Therefore, the present invention has been made in view of the above problems, and its purpose is a mechanical type that can be used without a power source and can suck a chemical solution at a predetermined speed (scheduled speed). It is to provide a (manual type) chemical liquid suction device.

This application discloses the following invention:
1. A chemical liquid suction device for sucking a chemical liquid into a syringe having a cylinder member and a piston member,
A piston holding mechanism for holding the piston member;
A cylinder holding mechanism for holding the cylinder member,
The piston holding mechanism and the cylinder holding mechanism are configured to be movable so as to approach or separate from each other,
further,
A biasing force is applied to at least one of the piston holding mechanism and the cylinder holding mechanism, whereby (i) the first state where the piston holding mechanism and the cylinder holding mechanism are close to each other; An urging mechanism for moving one of the piston holding mechanism and the cylinder holding mechanism to a second state separated by a predetermined distance;
Mechanical chemical suction device.

According to the present invention, it is possible to provide a mechanical chemical solution suction device that can be used without a power source with a simple structure and can suck a chemical solution at a predetermined speed.

1 is a perspective view of a mechanical chemical liquid suction device according to an embodiment. 1 is a perspective view of a mechanical chemical liquid suction device (a case and a syringe are not shown) according to an embodiment. It is a side view which shows typically the internal structure of a chemical | medical solution suction device. It is a front view which shows typically the internal structure of a chemical | medical solution suction device. It is a figure for demonstrating the structure and operation | movement of a piston holding structure. It is a schematic diagram which shows an example of the connection of a chemical solution suction device and a chemical solution bottle. It is a figure for demonstrating operation | movement of the mechanical chemical | medical solution suction apparatus which concerns on one Embodiment. It is a perspective view which shows the other example of a suction amount adjustment mechanism. It is a front view which shows typically the structure of the other example of a suction amount adjustment mechanism. It is a perspective view which shows the other example of a syringe. It is a figure which shows an example of attachment of a syringe. It is a perspective view of the mechanical type chemical | medical solution suction apparatus which concerns on other embodiment. It is a left view of the chemical | medical solution suction device of FIG. 12A. It is a front view of the chemical | medical solution suction apparatus of FIG. 12A. It is a top view of the chemical | medical solution suction device of FIG. 12A. It is a perspective view of the flange holder provided in the chemical | medical solution suction device of FIG. 12A. It is a front view which illustrates other composition of a clamping member.

Embodiments of the present invention will be described with reference to the drawings. In the drawings, structural portions having the same function are denoted by the same or corresponding reference numerals.

〔Syringe〕
A chemical syringe 5 shown in FIG. 1 has a cylindrical cylinder member 6 and a piston member 7 slidably inserted therein. A conduit 6b is formed at the distal end of the cylinder member 6, and a cylinder flange 6a having a substantially circular contour is formed at the proximal end. The cylinder flange 6a may have an I-cut shape as a whole by forming straight portions at two locations on the outer peripheral portion.

A disc-shaped piston flange 7 a is formed at the base end portion of the piston member 7. FIG. 1 shows an empty syringe 5 in which the piston member 7 is inserted into the cylinder member 6, and no chemical solution is filled in the cylinder member 7 at this time.

In the present embodiment, the piston member 7 has a rod and a plunger (not shown) provided at the tip of the rod, but a so-called rodless type piston member (that is, only a plunger member). May be used. Further, the contour shape of the

flanges

6a and 7a is not particularly limited, and may be, for example, an ellipse or a polygon.

As the chemical solution filled in the syringe 5, various types such as physiological saline, contrast medium, and liquid medicine can be used.

In addition, as a chemical | medical solution syringe, a syringe as shown, for example in FIG. 10 (a), (b) may be sufficient, and this syringe is for 200 ml, for example. The chemical syringe may include a cylinder member 501 and a piston member 502, and the cylinder flange 501a of the cylinder member 501 may have an I-cut contour shape. Two notches 505 (only one is shown) are formed on the outer periphery of the cylinder flange 501a. The conduit portion 501b at the tip of the cylinder member 501 may be for luer lock connection having two inner and outer cylindrical portions arranged coaxially. As shown in FIG. 10B, a ring-shaped protrusion 501c and a plurality of ribs 501d extending outward from the protrusion 501c may be formed on the rear surface of the cylinder flange 501a. The mechanism that engages with the notch 505 will be described later.

In FIG. 10, the cylinder flange 501 a is formed with both the notch 505 and the rib 501 d, but only one of them may be formed.

[Mechanical chemical suction device]
As shown in FIGS. 1 and 2, the mechanical chemical liquid suction device 1 of the present embodiment (hereinafter also simply referred to as “chemical liquid suction device 1”) is slightly attached to a part of the plate-like base member 13 as a whole. The configuration is such that a vertically long case 10 is provided. Specifically, a piston holding mechanism 20 provided on the base member 13 side and a cylinder holding mechanism 30 provided on the case 10 side and configured to be vertically movable are provided. Further, as shown in FIG. 2, the chemical suction device 1 includes a slide mechanism 40 for enabling the cylinder holding mechanism 30 to move in the vertical direction, an urging unit 50, a suction amount adjusting mechanism 60, and a lock mechanism 70 ( (Details will be described later).

Although not limited thereto, in this embodiment, as shown in FIG. 2, four cross-sectional L-shaped members 14 are erected on the upper surface of the base member 13, thereby constituting a frame. A front plate 16 is attached to the two L-shaped members 14 on the front side, and two

slits

16 a and 16 a extending in the vertical direction are formed in the front plate 16. Adjacent L-shaped members 14 are connected by a predetermined connecting member.

In addition, the material of each part of the chemical liquid suction device 1 may be made of resin or metal. However, when the suction device is used in an MRI room, it is preferable that the suction device is made of a non-magnetic material so as not to be drawn into the gantry of the MRI device.

Referring to FIG. 7, the operation of the chemical liquid suction device 1 will be briefly described first. First, as an example, as shown in FIG. 7A, an empty syringe 5 is provided in the cylinder holding mechanism 30 of the chemical liquid suction device 1. The user pushes down the syringe 5 and the cylinder holding mechanism 30. When the syringe 5 is pushed down to the state of FIG. 7B, the piston flange 7 a of the syringe 5 is gripped by the piston holding mechanism 20. Next, when a lock mechanism 70 (see FIG. 1) described later is released, the piston holding mechanism 30 and the like are pulled up by the urging force of the urging unit 50 (the piston member 7 does not move), thereby sucking the chemical into the syringe 5. Will be.

The configuration of each part of the suction device 1 that operates in this way will be described in detail below.
[Cylinder holding mechanism]
As shown in FIGS. 1 to 3, the cylinder holding mechanism 30 includes a cylinder flange 6a of the cylinder member 6 and a flange holder 31 for holding the vicinity thereof. The flange holder 31 is formed in a substantially U shape (plan view) as a whole. The flange holder 31 is formed with a substantially U-shaped fitting groove 31a (a substantially U-shaped groove when viewed from the front) into which the cylinder flange 6a is fitted. As shown in FIG. 1, the fitting groove 31a is open toward the front surface side, so that the cylinder flange 6a can be fitted into the groove 31a while moving in a substantially horizontal direction. . The cylinder flange 6a is attached to the flange holder 31 in such a direction that each cut portion faces frontward and rearward.

Regarding the shape (plan view) of the fitting groove 31a, as an example, the inner half of the groove (rear side) may have a circular shape corresponding to the shape of the cylinder flange 6a. Thereby, it becomes possible to hold | maintain the cylinder flange 6a stably. The flange holder 31 may be made of metal or resin as long as it can hold the cylinder flange 6a firmly, and is not particularly limited.

The cylinder holding mechanism 30 includes a pair of connecting members 35 for connecting the flange holder 31 to a slide mechanism 40 (described later in detail) inside the case 10, and a movable block 33 attached to the lower side of the flange holder 31. ing. The connection member 35 is a sheet metal member as an example, and one end side thereof is fixed to the side surface of the flange holder 31. The connection member 35 extends into the case through the slit 16a of the front plate 16, and the other end side is fixed to a base member 43 (see FIG. 3, details below) in the case 10.

In this example, the movable block 33 is provided on the front side of the case 10, and one bearing 33 a is attached to each end of the movable block 33. The movable block 33 supports a part of the lower surface of the flange holder 31 on its upper surface. Each of the bearings 33 is configured to roll on the surface of the case 10. By the movable block 33 and the bearing 33a, the flange holder 31 can be moved up and down with high accuracy while suppressing deflection and displacement.

Note that the movable block 33 and the bearing 33 a are not limited to the outside of the case 10 and may be disposed inside the case 10.

[Piston holding mechanism]
The piston holding mechanism 20 is a mechanism for gripping the piston flange 7 a of the syringe 5, and as shown in FIGS. 1 and 5, as a whole, a holder 27 formed in a generally upward U shape, And a clamping member 25 disposed on the surface.

As shown in FIG. 5, the holder 27 has a base portion 27 s on which the clamping member 25 is placed, and side walls 27 a that rise upward from both ends thereof, and the front ends of the side walls 27 a face inward. It is a protruding pressing part 27b.

In addition, in FIG. 1 etc., the state without a wall member is drawn on the front surface and the back surface of the holder 27, but the present invention is not limited to this. You may make it arrange | position the clamping member 25 in the box-shaped holder which provided the wall member in the front surface and the back surface. However, even in this case, it is preferable that the piston flange 7a of the syringe 5 is slid in the horizontal direction and removed from the clamping member 25 (details will be described later) after the chemical liquid suction is completed.

As shown in FIG. 5, the clamping member 25 has a plate-like elastic central portion 24 that can be elastically deformed, and a pair of claw portions 23 formed at both ends thereof. As an example, the clamping member 25 may be a single component in which the elastic central portion 24 and the pair of claw portions 23 are integrally formed. As another example, the elastic central portion 24 and the pair of claw portions 23 may be formed as separate members.

The clamping member 25 has a shape as shown in FIG. 5A in a state where no external force is applied, that is, the elastic central portion 24 curves upward in an arc shape and the claw portions 23 on both sides spread outward. It is in such a state. The elastic central portion 24 does not necessarily have a complete arc shape, and may have a shape in which an arc portion and a linear portion are combined.

The material of the clamping member 25 may be either metal or resin and is not particularly limited. In the case of resin, for example, POM or ABS may be used, and the thickness of the elastic central portion 24 may be about 0.5 mm to 2 mm, for example. Further, if necessary, one or more ribs 25a (see FIG. 13 as an example) or one or more protrusions are formed on the upper surface of the elastic central portion 24, and these ribs or protrusions are formed on the piston flange 7a. The nail | claw part 23 may become easy to close inside by contact | abutting to the lower surface of this.

When the piston flange 7a is moved downward from the state shown in FIG. 5A as shown in FIGS. 5B and 5C, first, the outer peripheral portion of the piston flange 7a is located inside each claw portion 23. The piston flange 7a is gradually pushed into the clamping member 25 while the claws 23 are slightly expanded outward.

5C, the elastic central portion 24 is pushed by the piston flange 7a and is elastically deformed so as to be substantially flat. By this deformation, the claws 23 are closed, and the piston flange 7a is closed. It will be in a state that praises. In this state, the inner locking surface 23b of each claw 23 is locked to the upper surface of the piston flange 7a, and a part of the elastic central portion 24 is firmly in contact with the lower surface of the piston flange 7a. The piston flange 7a is locked by the clamping member 25.

As shown in FIG. 5 (C), a tapered surface 23a is formed on the tip outer side portion of the claw portion 23. The tapered surface 23a abuts against a pressing portion 27b of the holder 27, so that the clamping member 25 is attached to the holder. 27 so that it cannot be removed. Further, when the piston member 7 is pulled, each taper surface 23a of the claw portion 23 comes into contact with the pressing portion 27b, so that the pair of claw portions 23 are more narrowed inward. The flange 7a is more reliably prevented from coming off the clamping member 25.

In the present embodiment, the piston holding mechanism 20 as shown in FIG. 5 is used. However, naturally, a holding mechanism having another simpler configuration may be used. For example, a substantially horizontal flange receiving groove (not shown) may be formed in a certain member, and the piston flange 7a may be fixed by inserting the piston flange 7a into the groove. Alternatively, the piston flange 7a may be gripped and fixed by one or two movable clamping members (not shown).

[Slide mechanism]
As schematically shown in FIG. 3, the slide mechanism 40 includes a slide rail 41 arranged in the vertical direction in the case 10 (see FIG. 1) and a base member 43 attached to the slide rail 41 and moving linearly. ing. As will be described later, the base member 43 is a member for holding the oil damper 45 and the locking portion 37, and any specific shape can be used as long as it has such a function. There may be. The base member 43 may be made of metal or resin, and is not particularly limited.

As the slide rail 41, for example, a commercially available one can be used, and detailed illustration is omitted. However, the slide rail 41 may have a fixed first rail and a movable second rail that slides relative thereto. . As an example, the first rail may be fixed to the front plate 16 (see FIG. 2, not shown in FIG. 3). In this case, the base member 43 is connected to the second rail. Regarding the connection between the second rail and the base member 43, the base member 43 may be directly fixed to the second rail, or the base member 43 may be fixed to the second rail with some intermediate member interposed therebetween.

It should be noted that any slide mechanism may be used as long as it allows the cylinder holding mechanism 30 to reciprocate linearly.

[Energizing unit]
The urging unit 50 is a unit that generates a force for moving the cylinder holding mechanism 30 and the like upward. In this example, a conston spring is used as the urging unit 50 (hereinafter also referred to as “conston spring 50”). The Conston spring 50 is also called a constant load spring, and has a feature that the torque to be restored is substantially constant regardless of the stroke. As shown in FIG. 3, the conston spring 50 has a drum portion 53 around which a thin strip steel plate 51 is wound in a spiral shape, and the tip 51 a of the strip steel plate 51 drawn out from the drum portion 53 is fixed to the base member 43. . The drum portion 53 is disposed above the base member 43 and in an orientation in which the axis is substantially horizontal.

As the Conston spring 50, the urging force raises the entire cylinder holding mechanism 30 to which the empty syringe 5 is mounted (see FIG. 7), thereby generating a torque that can suck the drug solution into the syringe 5. Just choose.

Note that the “biasing mechanism” in the present invention is not necessarily limited to the conston spring, and other urging means (for example, a coil spring or the like) may be used. A hydraulic actuator or a pneumatic actuator may be used as a power source.

As shown in FIG. 3, an oil damper (rotary damper) 45 is provided on a part of the base member 43. As the oil damper 45 itself, a conventionally known one may be used. The oil damper 45 is an example, and includes a gear 45a and a casing (not shown) to which the gear 45a is attached. In the casing, a housing portion filled with oil (for example, silicon oil) is formed in a mounting portion of the gear 45a, and the gear is rotated slowly by the action of the oil. The gear 45 a of the oil damper 45 is engaged with, for example, teeth of a rack 47 provided substantially perpendicular to the base member 13. The rack 47 may be made of resin or metal. However, when the rack 47 is made of metal, it is easy to ensure the rigidity of the rack 47, which is advantageous. In addition, regarding the orientation of the rack 47, in the example of FIG. 3, the 47 is arranged so that the tooth side faces the front of the apparatus, but the present invention is not limited to this.

Note that a plurality of (for example, two) oil dampers 45 may be provided. The oil damper 45 is for reducing the moving speed of the cylinder holding mechanism 30, and the arrangement position of the oil damper 45 can be appropriately changed as long as such an action is obtained. The “oil damper” is intended to be a damper that generates a braking force (braking force) by the viscous resistance of a filled fluid, and the type of fluid is not particularly limited.

[Suction volume adjustment mechanism and lock mechanism]
FIG. 4 schematically shows the suction amount adjusting mechanism 60 and the lock mechanism 70.

The suction amount adjusting mechanism 60 is for restricting the movement range of the base member 43 (that is, the movement range of the cylinder holding mechanism 30), and the side plate 61 (FIGS. 1 and 2 also has a slit formed in the vertical direction). And a knob 63 which can be positioned at an arbitrary position in the slit.

The screw 63a of the knob 63 is engaged with a fixing structure 68 (not shown in detail). (A) When the knob 63 is loosened, the knob 63 can be freely moved in the slit. (B) When the knob 63 is tightened, the knob 63 can be fixed at an arbitrary position. When the base part 43 is lifted, for example, the base part 43 comes into contact with the screw part 63a of the knob 63, whereby the upper limit of the movement range of the base part 43 is regulated. Accordingly, the moving range of the cylinder holding mechanism 30 that moves together with the base portion 43 is also restricted.

Adjustment of the moving range of the cylinder holding mechanism 30 determines the stroke amount of the piston member 7 with respect to the cylinder member 6, and thus the amount of the chemical liquid sucked into the syringe 5 is adjusted.

The threaded portion 63a of the knob 63 does not directly contact the base member 43, but some intermediate member (not shown) configured to move up and down together with the knob 63 contacts the base member 43. Good. You may display the indicator etc. which display the amount of chemical | medical solutions on the side plate 61 (FIG. 1, FIG. 2) as needed.

Other configuration examples of the suction amount adjusting mechanism will be described later with reference to other drawings (FIGS. 8 and 9).

The lock mechanism 70 (see FIG. 4) is a mechanism for maintaining the base member 43 pushed down to the lower end position by the user on the spot. In the present embodiment, the lock mechanism 70 includes a main body 71 that houses a link mechanism (not shown), a stopper 75 that protrudes therefrom and moves in a substantially horizontal direction, and a lock release lever 72 that moves the stopper 75. Is provided. The stopper 75 is biased in a state of protruding from the main body 71 by a biasing member (for example, a spring) (not shown).

On the other hand, the base member 43 is formed with a locking portion 37 that engages with the stopper 75. The locking portion 37 may be substantially L-shaped as an example. When the base portion 43 is pushed downward, the tapered portion 37a at the distal end of the locking portion 37 and the tapered portion 75a at the distal end of the stopper 75 come into contact with each other, whereby the stopper 75 biases a biasing member (not shown). Moves in a substantially horizontal direction while resisting. When the locking portion 37 is pushed down to a predetermined position, the stopper 75 returns to the original protruding position, and the locking portion 37 and the stopper 75 are locked. Thereby, the base member 43 is locked at this position (this corresponds to the state of FIG. 7B).

In this locked state, the strip steel plate 51 of the conston spring 50 is pulled out downward, and the urging force is applied to the base member 43. The locked state is released when the user operates the lock release lever 72. Specifically, when the lock release lever 72 is operated, the stopper 75 is retracted into the main body 71 by a predetermined distance, whereby the lock between the stopper 75 and the lock portion 37 is released, and the lock is released. .

After the lock is released, the base member 43 (and thus the cylinder holding mechanism 30) rises relatively slowly at a substantially constant speed by the urging force of the conston spring 50 and the action of the oil damper 45 (see FIG. 3). This rise continues until the base member 43 moves to a predetermined upper limit position and a part of the base member 43 comes into contact with the screw portion 63a (one example) of the knob 63.

Note that the lock mechanism 70 is not limited to the above-described configuration as long as the base portion 43 can be locked at the lower end position and can be unlocked by a predetermined user operation. It can be set as this structure.

[Operation and usage of chemical suction device]
The operation and usage of the mechanical chemical liquid suction device 1 of the present embodiment configured as described above will be described below. In addition, the order of the following process is an example to the last, and does not limit this invention at all. You may change the order of a process as needed.

First, the height of the knob 63 of the suction amount adjusting mechanism 60 is adjusted in accordance with the amount of the chemical liquid sucked into the empty syringe 5 (see FIG. 1).

Next, as shown in FIG. 1 and FIG. 7A, the cylinder flange 6a of the syringe 5 is held by the flange holder 31 of the cylinder holding mechanism 30.

As shown in FIG. 6, one end of a chemical liquid tube 91 is connected to the conduit portion 6 b of the syringe 5. The other end of the chemical solution tube 91 is connected to a chemical solution bottle 95 containing a chemical solution. As an example, the chemical liquid bottle 95 may be held on a stand 93 different from the chemical liquid suction device 1.

Next, the user pushes down the syringe 5 and the cylinder holding mechanism 30 downward from the state of FIG. The cylinder holding mechanism 30 moves downward together with the base member 43 (see FIG. 3) in the case. During this operation, the strip steel plate 51 of the conston spring 50 is pulled out from the drum portion 53.

When pushed down to the state shown in FIG. 7B, the piston flange 7a is gripped by the pair of claws 23 of the clamping member 25. Further, in this state, the locking portion 37 of the base member 43 (FIG. 4) and the stopper 75 of the lock mechanism 70 are locked, whereby the cylinder holding mechanism 30 is locked at the lower end position.

Next, the user operates the lock release lever 72 of the lock mechanism 70 to release the lock. Thereby, the latching | locking part 37 of the base member 43 (FIG. 4) remove | deviates from the stopper 75, and the cylinder holding mechanism 30 raises with the urging | biasing force of the Conston spring 75. FIG. Here, since the piston member 7 remains fixed by the piston holding mechanism 20, only the cylinder member 6 rises. As a result, the piston member 7 is pulled out from the cylinder member 6, and the chemical solution in the chemical solution bottle 95 (see FIG. 6) is sucked into the syringe 5.

Here, since the conston spring 75 is used in the present embodiment, the cylinder member 6 can be raised at a substantially constant speed. In addition, the cylinder member 6 can be raised relatively slowly by the action of the oil damper 45 (see FIG. 3).

As described above, the cylinder member 6 is lifted while sucking the chemical solution, and when the cylinder member 6 is lifted to the upper end position as shown in FIG. 7C, the lift is stopped and the suction of the chemical solution is completed.

Next, the user can remove the syringe 5 from the apparatus 1 by pulling the syringe 5 filled with the chemical solution toward the front side (see FIG. 1). When the piston flange 7a of the syringe 5 is removed from the clamping member 25, the clamping member 25 returns to its original shape (FIG. 7A, etc.).

The desired amount of chemical solution can be sucked into the syringe 5 through the series of steps described above.

According to the chemical liquid suction device 1 of the present invention as described above, the cylinder holding mechanism 30 is moved using the biasing unit 50 such as a conston spring as a driving source instead of using a driving source such as an electric motor. Therefore, the chemical solution can be sucked into the syringe 5 without a power source. Further, there is no fear that the device cannot be used due to a failure of an electrical component or the like (although this does not dismiss that the chemical suction device according to one embodiment of the present invention includes the electrical component). Although it may be difficult to secure a power source in an MRI room or the like, the chemical liquid suction device according to one embodiment of the present invention can be used favorably even in such an environment. Further, by using a non-magnetic material, it is possible to prevent the influence on the imaging and the chemical liquid suction device from being drawn into the gantry.

Moreover, since the chemical | medical solution suction device 1 draws out the piston member 7 from the cylinder member 6 relatively using the urging | biasing force of the urging | biasing unit 50, regardless of a user's operation, the urging | biasing unit 50 is fundamentally. Can be sucked at a predetermined speed determined by the urging force. Therefore, it is possible to prevent a problem that the suction speed is too high and bubbles are mixed into the chemical solution.

In addition, since such a mechanical chemical liquid suction device 1 can be configured with a simple structure as compared with an electric device such as an electric motor or the like as a drive source, there is no problem of failure of electric parts. It is also advantageous to reduce the manufacturing cost.

Further, as in the present embodiment, the entire apparatus is vertical, and the piston holding mechanism 20 is disposed below, the cylinder holding mechanism 30 is disposed above, and the cylinder holding mechanism 30 moves up and down. In this case, the piston member 7 can be attached to the piston holding mechanism 20 by a simple operation of pressing the syringe 5 attached to the cylinder holding mechanism 30 from above.

Further, as in this embodiment, the piston holding mechanism 20 has a clamping member 25 having (i) at least two claw portions 23 that engage with the piston flange 7a of the piston member 7, and (ii) the piston flange. By pushing 7a into the clamping member 25, the claw portion 23 is closed and the piston flange 7a is gripped. (Iii) Even if the piston member 7 is pulled (upward) in this state, the piston flange 7a remains clamped. When configured so as not to be disengaged from 25, it is possible to prevent the piston flange 7a from being detached during the suction of the chemical liquid. On the other hand, when removing the syringe 5, it is only necessary to pull the syringe 5 to the front side.

[Other forms]
The mechanical chemical liquid suction device of the present invention is not limited to the above-described one, and various modifications can be made.
(A) Although the vertical type chemical liquid suction device has been described above, a horizontal type device in which the syringe is turned sideways may be used.
(B) Although the example in which the cylinder holding mechanism 30 is movable and the piston holding mechanism 20 is fixed has been described above, conversely, the cylinder holding mechanism 30 may be fixed and the piston holding mechanism 20 may be configured to be movable. . Alternatively, both mechanisms may be configured to be movable.
(C1) The flange holder 31 of the cylinder holding mechanism 30 may be configured such that a plurality of types of syringes (cylinder flanges) having different diameters can be attached to the flange holder 31 by using an additional adapter.
(C2) With regard to such an adapter, the adapter may have, for example, a pair of leaf spring-like arm portions and a pair of arm portions formed with locking claws at the tips thereof. The cylinder flange may be held by engaging with a notch 505 (see FIG. 10 as an example) of the cylinder flange. (I) By moving the cylinder flange from the front to the rear (see FIG. 1), the locking claw may be locked to the notch, or (ii) the cylinder flange is The locking claw may be locked to the notch by moving from the front to the rear and further rotating around the axis by 90 degrees or another arbitrary angle in the adapter. Here, the step of moving the cylinder flange from the front to the rear may be performed in such a posture that the flat portion of the I-cut portion faces the left-right direction in FIG.
(D) Although the flange holder 31 that holds only the vicinity of the cylinder flange 6a has been described above, a flange holder that can hold a wider range of the outer peripheral portion of the cylinder member 6 may be used.

(E) In FIG. 6, the stand 93 is provided separately from the chemical solution suction device, but a holding unit for holding (for example, hanging) the chemical solution bottle 95 in the chemical solution suction device may be configured.
(F) In the above description, the chemical liquid suction device 1 on which only one syringe is mounted has been described. However, two or more syringes can be mounted, and each syringe is attached independently (or common to several syringes). It is good also as a chemical | medical solution suction apparatus provided with the force unit.

(G1) The attachment of the syringe 5 may be performed in a manner as shown in FIG. That is, in the state of FIG. 11A, the cylinder holding mechanism 30 is located at a predetermined lower end position, and the syringe 5 is attached to the device in this state. As shown in FIG. 11B, when the syringe 5 is pushed down, the cylinder flange 6a engages with the cylinder holding mechanism 30, and at the same time, the piston flange 7a engages with the piston holding mechanism 20. Thereby, the setting of the syringe 5 is completed. In order to realize the attachment as described above, the distance between the clamping member 25 of the piston holding mechanism 20 and the fitting groove 31a of the flange holder 31 is the same as or substantially the same as the distance between the cylinder flange 6a and the piston flange 7a. May be set identically.
(G2) Here, when the flange 6a fits into the holding mechanism 30 and / or when the flange 7a fits into the holding mechanism 20, it is also preferable that a click feeling is obtained. Thereby, the user can know by sound and / or touch that the flange is normally locked. In addition, it is also preferable that a click feeling is similarly obtained when the locking portion 37 and the stopper 75 shown in FIG. 4 are locked.

(H) The mechanical chemical liquid suction device according to one embodiment of the present invention may further include an IC tag reader / writer that reads and writes data from and to an IC tag (for example, an RFID tag) attached to a syringe. In this case, for example, a control circuit and / or a battery for driving the reader / writer may be provided in the mechanical chemical liquid suction device. As an example, the IC tag reader / writer may be configured to write information indicating that the drug solution is normally filled in the syringe. The IC tag may be provided on the outer periphery of the cylinder member or on the cylinder flange.

[Other examples of suction volume adjustment mechanism]
The suction amount adjusting mechanism may be as shown in FIGS. In this example, the suction amount adjustment mechanism 160 includes a guide bar 161 provided in the vertical direction and a holder member 162 that moves in the vertical direction along the guide bar 161.

A spur gear-shaped uneven portion 161 a is formed on the side surface of the guide bar 161. The guide bar 161 may be erected on the base member 13. The guide bar 161 may be made of metal or resin, and is not particularly limited.

The holder member 162 holds a locking member 163 that is movable in the horizontal direction (see the white arrow in FIG. 9). The locking member 163 has a locking portion 163 a that meshes with the uneven portion 161 a of the guide bar 161. The locking member 163 is formed with a lever 165 operated by the user. As an example, the lever 165 is disposed on the lower surface of the locking member 163 and extends downward.

A part of the holder member 162 or a part of other members provided on the holder member 162 abuts directly or indirectly on the base member 43 (see FIG. 9), so that the upper limit of the movement range of the base member 43 is increased. Being regulated.

In the suction amount adjusting mechanism 160 configured as described above, the user pulls the locking member 163 by placing a finger on the lever 165 and releases the engagement between the locking portion 163a and the uneven portion 161a. You can move up and down. By moving the holder member 162 to an arbitrary position in the vertical direction and moving the locking member 163 back toward the guide bar 161, the locking portion 163a and the concavo-convex portion 161a are engaged with each other, and the height position of the holder member 162 Is fixed.

By adjusting the height position of the holder member 162 in this way, the upper limit of the movement range of the base portion 43 is regulated, the relative stroke amount between the cylinder member 6 and the piston member 7 is adjusted, and the syringe 5 is moved to. The amount of suction is adjusted.

Although not shown in FIGS. 8 and 9, a biasing member such as a spring is disposed on the holder member 162. (i) By this biasing member, the locking portion of the locking member 163 is normally operated. 163a may be configured to be pressed against the uneven portion 161a of the guide bar 161, and (ii) when the user pulls the locking member 163, the guide bar 161 is separated from the guide bar 161 against the urging force. .

[Mechanical liquid suction device that holds other syringes]
12A to 12D show an example of a chemical liquid suction device that holds another syringe (for example, a syringe for 50 ml). In this example, the chemical liquid suction device includes a cylinder holding mechanism 130 for holding a cylinder flange 6 a formed in a substantially elliptic shape of the syringe 5. The cylinder holding mechanism 130 has a flange holder 131 having a shape corresponding to the shape of the cylinder flange 6a, although the basic function is the same as that of the above-described embodiment. Specifically, as shown in FIG. 12E, this flange holder has an opening 131b having a contour corresponding to the cylinder flange 6a and a fitting groove 131a having a thickness corresponding to the cylinder flange 6a. Reference numeral 131c is a flat receiving portion as an example for receiving the cylinder flange 6a.

As in the above-described embodiment, the syringe is attached as follows: (i) The syringe is moved in the lateral direction (refer to the front-rear direction in FIG. 1) and inserted into the cylinder flange fitting groove 131a (rotated, for example, 90 degrees as necessary). Then, it may be performed by an operation of pushing down downward, or (ii) as shown in FIG. 11, only by an operation of moving the syringe downward.

Although not limited, the chemical liquid suction device of FIGS. 12A to 12D is provided with a suction amount adjusting mechanism 160 as described with reference to FIGS.

As shown in FIG. 12A, in this example, the shape of the holder 127 of the piston holding mechanism 120 is modified from that shown in FIG. Specifically, the holder 127 is formed in a case shape that accommodates the clamping member 125.

12A shows a state in which the cylinder flange 6a is held by the cylinder holding mechanism 130 (the piston flange 7a is not held by the piston holding mechanism 120). Of course, it is described above with reference to FIG. The syringe 5 may be attached in such a manner.

(Appendix)
This application discloses the following invention. Note that the reference numerals in parentheses do not limit the present invention.

1. A chemical liquid suction device (1) for sucking a chemical liquid into a syringe (5) having a cylinder member (6) and a piston member (7),
A piston holding mechanism (20, 120) for holding the piston member;
A cylinder holding mechanism (30, 130) for holding a cylinder member,
The piston holding mechanism and the cylinder holding mechanism are configured to be movable so as to approach or separate from each other,
further,
A biasing force is applied to at least one of the piston holding mechanism and the cylinder holding mechanism, whereby (i) the first state where the piston holding mechanism and the cylinder holding mechanism are close to each other; A mechanical chemical suction device (1) comprising an urging mechanism (50) for moving one of the piston holding mechanism and the cylinder holding mechanism to a second state separated by a predetermined distance.

2. 2. The mechanical liquid suction device according to 1 above, wherein the biasing mechanism (50) has a conston spring that generates a substantially constant biasing force.

The “substantially constant urging force” does not require the urging force during the stroke of the Conston spring to be strictly constant, and may have some variation (must be substantially constant). Is intended.

3. The piston holding mechanism (20, 120) is fixed to a base member (13),
The cylinder holding mechanism (30, 130) is configured to be movable,
3. The mechanical chemical liquid suction device according to 1 or 2 above.

4). further,
The mechanical chemical liquid suction device according to claim 3, further comprising a damper (45) for reducing the moving speed of the cylinder holding mechanism.

5. A rack member (47) disposed along the moving direction of the cylinder holding mechanism is provided;
5. The mechanical chemical liquid suction device according to 4 above, wherein the damper is a rotary oil damper (45) having a gear engaged with the rack member.

6). further,
The mechanical chemical liquid suction device according to any one of 3 to 5, further comprising a range adjustment mechanism (60) for adjusting a movement range of the cylinder holding mechanism.

7). The mechanical chemical liquid suction device according to any one of claims 1 to 6, further comprising a lock mechanism (70) for maintaining the first state in which the piston holding mechanism and the cylinder holding mechanism are close to each other.

8). As a whole, it is a vertical type, and the piston holding mechanism is arranged below, the cylinder holding mechanism is arranged above, and the cylinder holding mechanism is configured to move up and down.
8. The mechanical chemical liquid suction device according to any one of 1 to 7 above.

9. The piston holding mechanism (20, 120)
(I) a clamping member (25) having at least two claw portions (23, 23) engaged with a piston flange of the cylinder member; and (ii) pushing the piston flange into the clamping member. Thus, the claw portion is closed and the piston flange is gripped. (Iii) Even if the cylinder member is pulled in the state (opposite to the pushing direction), the piston flange does not come off from the clamping member (25). Configured as
9. The mechanical chemical liquid suction device according to any one of 1 to 8 above.

10. The clamping member is
A central elastic portion (24) that is elastically deformable when the piston flange is pressed;
A pair of claws (23, 23) formed at both ends of the central elastic portion;
10. The mechanical chemical liquid suction device according to 9 above.

11. A syringe (5) having a cylinder member and a piston member;
A system comprising the mechanical chemical liquid suction device (1) described above.

12 The system as described above, wherein an IC tag is attached to the syringe.

DESCRIPTION OF SYMBOLS 1 Mechanical chemical | medical solution suction device 5 Syringe 6 Cylinder member 6a Cylinder flange 7 Piston member 7a Piston flange 10 Case 13 Base member 16

Front plate

20, 120 Piston holding mechanism 23 Claw part 24 Elastic center part 25 Clamping

member

27, 127 Holder

27a Side wall

27b Holding portion

27s Base portion

30, 130

Cylinder holding mechanism

31, 131 Flange holder 31a Fitting groove 33 Movable block 35 Connecting member 37 Locking portion 40 Slide mechanism 41 Slide rail 43 Base member 45 Oil damper 47 Rack 50 Energizing unit (Conston spring)
51 Steel strip 51a Tip 53 Drum 60 Suction adjustment mechanism 61 Side plate 63 Knob 68 Fixing structure 70 Lock mechanism 71 Main body 72 Lock release lever 75 Stopper 161 Suction adjustment mechanism 161 Guide bar 162 Holder member 163 Locking member

Claims

A chemical liquid suction device for sucking a chemical liquid into a syringe having a cylinder member and a piston member,
A piston holding mechanism for holding the piston member;
A cylinder holding mechanism for holding the cylinder member,
The piston holding mechanism and the cylinder holding mechanism are configured to be movable so as to approach or separate from each other,
further,
A biasing force is applied to at least one of the piston holding mechanism and the cylinder holding mechanism, whereby (i) the first state where the piston holding mechanism and the cylinder holding mechanism are close to each other; An urging mechanism for moving one of the piston holding mechanism and the cylinder holding mechanism to a second state separated by a predetermined distance;
Mechanical chemical suction device.
The mechanical chemical suction device according to claim 1, wherein the biasing mechanism includes a conston spring that generates a substantially constant biasing force.
The mechanical liquid suction device according to claim 1 or 2, wherein the piston holding mechanism is fixed to a base member, and the cylinder holding mechanism is configured to be movable.
further,
The mechanical chemical solution suction device according to claim 3, further comprising a damper for reducing a moving speed of the cylinder holding mechanism.
A rack member arranged along the moving direction of the cylinder holding mechanism is provided;
The damper is a rotary oil damper having a gear engaged with the rack member.
The mechanical chemical liquid suction device according to claim 4.
The mechanical chemical liquid suction device according to any one of claims 3 to 5, further comprising a range adjusting mechanism for adjusting a moving range of the cylinder holding mechanism.
The mechanical chemical liquid suction device according to any one of claims 1 to 6, further comprising a lock mechanism for maintaining the first state in which the piston holding mechanism and the cylinder holding mechanism are close to each other.
The overall vertical type, wherein the piston holding mechanism is disposed below, the cylinder holding mechanism is disposed above, and the cylinder holding mechanism is configured to move up and down. The mechanical chemical liquid suction device according to any one of the above.
The piston holding mechanism is
(I) a clamping member having at least two claw portions that engage with a piston flange of the piston member; and (ii) pushing the piston flange against the clamping member to close the claw portion. A piston flange is gripped, and (iii) the piston flange is configured not to be detached from the clamping member even if the cylinder member is pulled in that state.
The mechanical chemical liquid suction device according to any one of claims 1 to 8.
The clamping member is
A central elastic portion that is elastically deformable when the piston flange is pressed;
A pair of claws formed at both ends of the central elastic portion;
The mechanical chemical liquid suction device according to claim 9, comprising:
A syringe having a cylinder member and a piston member;
A system comprising the mechanical chemical liquid suction device according to any one of claims 1 to 10.
The system of claim 11, wherein an IC tag is attached to the syringe.