DE102006008894B4 - Transport device for disk-shaped data carrier - Google Patents

Abstract

Transport device for disk-shaped, preferably designed as a CD or DVD disk in a device for writing to the disk with at least one burner, wherein
the transport device (8, 48, 58) has a data carrier lift (8l) which can be moved vertically in the operating position;
the data carrier lift (8l) has at its upper portion a bearing surface (8v) for a data carrier (5s);
the data carrier lift (8l) is guided in a guide and
the data carrier lift (8l) is in engagement with a drive at its lower section,
characterized,
the drive has a slider-crank mechanism (8g) or has a rotary drive member and a screw-spindle transmission (58s) or has a rotary drive member and a toothed rack transmission or is designed as a linear drive.

Description

The invention relates to a transport device for disk-shaped data carrier with a central inner hole, such as CDs and DVDs.

Vinyl records were the first disk-shaped data carrier with an inner hole. They are almost completely replaced by data carriers such as CDs and CVDs, which are also available as once or more writable volumes.

There are machines for the production of individually writable data carriers are known in which the data carrier to be described is taken from a disk stack and one or more burners and one or more printers for labeling the data carrier is supplied.

In the DE 44 38 246 C1 is a printing device for printing isolated flat print media, preferably described by CDs in multi-color printing. The CDs are lifted and transported in a printing rhythm by means of a horizontally and vertically movable siphon.

The DE 198 00 051 C2 describes a device for magazineing and transporting the same sized and stacked disc-shaped elements with center hole, such as CDs, the disc-shaped elements are removed from a manipulator and transported to their destination.

The US Pat. No. 6,400,659 B1 describes a device for producing CD's, ie for writing to the CD's and for printing a label. For transporting the CD-ROMs, a transport device is provided, which has an arm with a clamping device. The arm is horizontally semicircular pivotable and vertically movable via a main device. There are three CD batches provided for blank CD-ROMs, described CD-ROMs and defective CD-ROMs. The pivotable arm grips or tucks a CD-ROM with the clamp.

The US Pat. No. 6,222,800 B1 describes a transport device according to the preamble of patent claim 1 and a self-loading copying device for recordable CD's. There are shown transport devices for the CD's, which have a disk-lift, which is driven by a lever arm of a solenoid.

The object of the present invention is to provide a simple, robust and cost-effective transport device for disc-shaped data carriers.

According to the invention, this object is achieved with the subject matter of claim 1. It is proposed a transport device for disk-shaped, preferably designed as a CD or DVD disk in a device for writing to the disk with at least one burner, the transport device has a vertically movable in operating position data carrier lift; the data carrier lift at its upper portion has a support surface for a data carrier; the data carrier lift is guided in a guide and the data carrier lift is in engagement with a drive at its lower portion, wherein it is provided that the drive comprises a sliding-crank mechanism or has a rotary drive member and a screw-spindle transmission or has a rotary drive member and a rack-and-pinion transmission or is designed as a linear drive.

Because the mounted in the guide disk-lift is movable only in one axis, the transport device is particularly simple and resistant to interference formed. No special precautions have to be taken to move the data carrier lift, because the guidance of the data carrier lift is predetermined by the guidance.

Preferably, as a rotary drive, a servo motor described below may be provided, the output of which is controlled very simply accurate angle. As a result, position sensors for determining the position of the data carrier lift are dispensable.

Advantageous embodiments of the invention are designated in the subclaims.

The slider crank mechanism may comprise a rotatably driven crank arm with a push member pivotally mounted thereon, wherein the push member is slidably mounted in a linear guide. In the linear guide may be a guide sleeve with a circular cylindrical hole, which is penetrated by the disk-lift, wherein the possible in the circular cylindrical hole rotational movement of the thrust member can be prevented by a suitable structural means, for example by a in a slot guided pen, as described below.

It can further be provided that the crank arm has a resilient fork-shaped portion. Due to the resilient design constraining forces on the drive can be avoided if, for example, the disk-lift is moved beyond the end position.

The resilient fork-shaped portion of the crank arm may be formed of spring steel, spring bronze or plastic.

In a further advantageous embodiment it can be provided that the data carrier lift is formed at its lower portion as a thrust member which is pivotally connected to the crank arm. It is therefore not necessary to provide a separate thrust member.

It can further be provided that the lower portion of the disk-lift has an axially extending slot-shaped recess which is penetrated perpendicular to the axis of the disk-lift of a pin which is in engagement with the crank arm.

The crank arm may be rotationally rigidly connected to the output shaft of a servomotor.

In a further embodiment, it is provided that a linear ball drive is arranged between the slider-crank mechanism and the data carrier lift.

It can be provided that the linear crank mechanism extends in a curved line.

Further, it can be provided that the linear ball drive has a tubular guide track, in which balls are filled in a dense packing movable. The tubular guide track can be formed, for example, as an injection-molded part from two half-shells, which can be joined together to form a closed guide track with a circular cross-section.

It can also be provided that the tubular guide track is formed as a bendable tube.

The linear ball drive described above, in which balls transfer a linear movement between two guide elements along a trajectory play, is characterized by a simple, material-saving and robust construction and allows to separate the gearbox and the data carrier lift spatially from each other. Such an arrangement may offer advantages, for example, for maintenance.

The balls may be commercially available balls for bearings, for example, with a diameter of 6 mm.

It can be provided that the inner diameter of the tubular guide track is 3% to 5% larger than the diameter of the balls.

For coupling the thrust crank gear to the linear ball drive can be provided that the output of the sliding-crank mechanism is designed as a rod-shaped thrust member.

It can further be provided that the diameter of the thrust member is smaller by 3% to 5% than the inner diameter of the tubular guideway.

In a further embodiment, it is provided that the lower end section of the data carrier lift engages in the section of the tubular guide track facing away from the output of the sliding-crank mechanism.

Advantageously, it can be provided that the diameter of the end section is smaller by 3% to 5% than the inner diameter of the tubular guide track.

It may further be provided that the output of the sliding crank gear away from the section of the tubular guide track is the guide for the data carrier lift.

The linear ball drive described above can thus be realized by simple means and is also easily integrated into the overall construction.

In a further advantageous embodiment, it can be provided that the drive of the data carrier lift has a rotary drive member and a screw spindle drive. A Schraubspindelgetriebe acts as a power amplifier, d. H. for the drive less power must be applied, but this is associated with an increased rotational travel.

In a further embodiment it can be provided that the drive of the data carrier lift has a rotary drive member and a rack gear.

When the servomotor is a servo motor designed for rotational motions of more than 120 °, in particular 360 ° and more, the servomotor may also be a conventional electric motor. Advantageously, it may also be a geared motor in which the engine speed is reduced by a fixedly connected to the engine gearbox. Because the data carrier lift is moved only between a lower and an upper end position, a precise angle control is unnecessary and can be replaced by limit switches o. Ä.

A particularly simple design is obtained if it is provided that the drive of the data carrier lift is designed as a linear drive. In particular, for small travels of the disk-lift, such a design may be beneficial.

The invention will now be explained in more detail with reference to the drawings. Show it

1 a central mechanism of a CD / DVD burner with a first embodiment of the transport device according to the invention;

2 the transport device in 1 ;

3 A second embodiment of the transport device according to the invention;

4a a third embodiment of the transport device according to the invention;

4b A fourth embodiment of the transport device according to the invention.

1 shows a central mechanic 1 a CD / DVD burner for writing CDs / DVDs, referred to in the following data carrier, which is a separating device 2 , Burner 3a to 3c , a printer 3d , a holding device 7 and a transport device 8th having.

In the separating device 2 it is a separating device with a drawer mechanism with a drawer 2s , The separating device is in 1 with closed drawer 2s shown on the separating device 2 is a volume stack 5 stored. One from the volume stack 5 selected data medium 5s will when opening the drawer 2s provided in a separating pocket of the drawer. In the in 1 shown representation of this disk is already on a disk-lift 8l the transport device 8th stored.

The disk lift 8l is formed substantially as a circular cylinder with a vertical cylinder axis. The upper end section of the data carrier lift 8l is formed as a circular cylinder, which in a conical or hemispherical guide pin 8f passes over and passes through the central inner hole of the disk 5s , The height of said circular cylinder corresponds at least to the thickness of the data carrier 5s ie he points in the in 1 illustrated embodiment, a height of 1.2 mm. The diameter of the circular cylinder is chosen so that between the diameter of the inner hole of the data carrier 5s and the diameter of the circular cylinder is formed a game.

Down to the circular cylinder is the disk-lift with an annular projection 7v trained on which the disk 5s rests.

The lower section of the disk lift 8l is in a slotted guide sleeve 8h added. The two diametrical and in the longitudinal direction of the guide sleeve 8h formed in the wall slots are of a fork-shaped crank arm 8k passed through with one at the lower end portion of the disk lift 8l arranged bearing pin 8s (please refer 2 ) and with the output of a servomotor 8m is blindly connected. In this way is a slider crank mechanism 8g formed, which is the rotational movement of the output of the servomotor 8m in a linear up and down movement of the disk lift 8l converts.

The holding device 7 has two horizontally swiveling gripper arms 7a on, which are connected via coupling rods with a two-armed pivoting lever and at its outer end portion with a gripper jaw 7b are formed. The pivoting lever is connected torsionally rigid with the output of a servomotor. The coupling rods are on the gripper arms 7a each stored in thrust rotary bearings and are prevented by a bend on slipping out of the thrust rotary bearing. The gripper arms 7a are by springs against the between the gripper jaws 7b positioned media 5s drawn. It is therefore not necessary to determine the end position of the servomotor by limit switches or limit by design measures. When the servo motor moves beyond the end position required for fixing the data carrier, the coupling rods slide without resistance in the push-turn bearing beyond the end position. The push-turn bearing can be a hole in the gripper arm, which is penetrated by the coupling rod with play. When opening the gripper arms 7a the angling on the coupling rod engages the gripper arm and pivots the gripper arm 7a against the spring force of the tension spring in the open position. Because the two gripper arms 7a spring-loaded, is held between them disk 5s centered, provided that the two tension springs are designed with the same spring characteristic and attack on the same long lever arms.

However, it may be provided a limit switch, which is connected to one of the two gripper arms 7a cooperates and is actuated when between the gripper jaws 7b no data carrier 5s is positioned. In this way it can be detected that no data carrier 5s more is available.

At the three burners 3a to 3c they can be burners with different technical specifications. However, burners of the same technical specification can also be provided in order to burn three data carriers in parallel, ie to write data into data carrier blanks.

To remove the in the separating pocket of the drawer 2s (please refer 1 ) stored selected data carrier 5s becomes the disk lift 8l move upwards so that the guide pin 8f the central inner hole of the data carrier 5s passes through and the disk on the annular projection 8v of the disk lift 8l comes to the plant. The disk lift 8th raises the disk in the further procedure 5s out of the singular bag and bring him into a position in which him the gripper jaws 7b the holding device 7 can fix. The disk lift 8th it takes its upper end position. Once the disk 5s is fixed, drives the disk-lift 8l in the lower end position. As a result, the central inner hole of the separating pocket is released, after which then the drawer 2s can be closed.

Then, for example, the burner drawer 3cs of the burner 3c opened and the disk lift 8l moves up again until its annular projection on the disk 5s comes to the plant. In the process, the data medium lift passes through 8l one in the burner drawer 3cs usual slot-shaped recess.

Now the gripper arms 7a opened and the disk lift 8l is with the attached disk 5s move down. The disk 5s is then on the open burner drawer 3cs stored. The disk lift 8th is now lowered back to its lower end position, causing the burner drawer 3cs no longer passes through, so that the burner drawer 3cs can be closed.

After the burning of the data carrier 5s becomes the burner drawer 3cs reopened and the disk lift 8l brings the disk 5s back to the upper end position in which the gripper arms 7a . 7b the disk 5s can fix.

After that, the disk-lift 8th lowered back to its lower end position, so that he the burner drawer 3cs no longer goes through, then then the burner drawer 3cs closed again.

Before the disk-lift 8l in the holding device 7 discarded media 5s picks it up in the drawer of another burner 3a respectively. 3b or the printer 3da must be opened, the drawer of the selected device must be opened, after which the process described above is recorded.

It can be provided that the disk-lift 8th the disk 5s finally on a in 1 not shown dispensing device stores, which may be formed, for example, as an inclined plane and which ends in a dispensing slot or an output tray of the CD / DVD burner. But it can also be provided a pivotable output device which cooperates with two or more output slots or output trays. It can be provided, for example, two output trays, in which an output tray quality-appropriate data carriers are stored, which are intended for output and are stored in the other tray unusable data carriers, which are recognized after a quality inspection as a committee. The quality check may be, for example, a verification of the volume content after the completion of the firing process.

The disk lift 8th the device according to the invention is thus moved only between a lower and an upper end position, whereby sensors and / or control means for detecting intermediate positions are not needed. This results in a simple, inexpensive and extremely reliable construction.

2 now shows the structure of the transport device 8th in detail.

The guide sleeve 8h has an inner diameter such that the cylindrical disk lift 8l slides with light play. The lower end section of the data carrier lift 8l is fork-shaped and as described above from the bearing pin 8s penetrated. The fork-shaped end section sweeping crank arm 8k forms together with the two longitudinal slots in the guide sleeve 8h an anti-rotation, so that a guide for the disk-lift 8l is formed.

It is intended the crank arm 8k form resilient to the servo motor 8m To protect against forced forces when driving over the end positions of the sliding-crank mechanism and also to avoid play in the rotary-push joint. That's why the forked crank arm is 8k in the 1 and 2 illustrated first embodiment of two spring wires formed, which may be formed of spring steel or spring bronze or other resilient material. The two spring wires are mounted with a bias on the bearing pin 8s is directed, so that the bearing pin 8s slides without play between the two spring wires.

Instead of the sliding-crank mechanism, another rotary-thrust transmission can be provided, for example a screw spindle transmission, as described below.

3 now shows a transport device 38 with a disk lift 38l , which is a guide sleeve arranged in the upper section 38h having. The guide sleeve 38h is designed as a hollow cylinder and very easy to produce because they have no Has longitudinal slots, as in the above in 1 and 2 described guide sleeve 8l the case is. The cylindrical main section of the data carrier lift 38l in the guide sleeve 38h is guided, is formed with a smaller diameter than the fork-shaped lower end portion. This is possible because the end portion is not provided as a guide at the same time. In comparison to the embodiment in 1 and 2 is the disk lift 8l designed with less material and therefore - provided the same material - with less mass. That's why the crank arm 8k and the servomotor 8m less burdened, from which, for example, a longer life and / or reliability can be derived.

The 4a shows a transport device 48 in which a linear ball drive 48k the linear output movement of the crank mechanism 8k along a curved section on the linear guided data carrier lift 8l transfers. The linear ball drive 48k is one with bullets 48kk filled pipe 48kr educated. The balls 48kk are in a tight pack movable in the tube 48kr filled. The inner diameter of the pipe 48kr is chosen so that the balls 48kk in the tube 48kr are easily movable with game stored. They form a curved row of balls whose axis follows the tube axis. A push member 48ks is also the output member of the crank gear 8k and passes through the rear portion of the tube 48kr , wherein the front end face of the push member 48ks interacts with the rear ball of the ball row. On the front ball of the ball row is the lower face of the disk-lift 8l on, with its lower section the upper section of the tube 48kr be upheld. The tube may also be a tubular guideway formed, for example, by two mirror-inverted shaped parts.

In the in 4a illustrated embodiment, the balls 48kk a diameter of 6 mm. The game between the balls 48kk and the inner wall of the pipe 48kr is 0.1 mm, ie the inner diameter of the tube 48kr is 0.2 mm larger than the diameter of the balls 48kk , The aforementioned game ensures easy mobility of the balls, so that a continuous contact of the balls between the thrust member 48ks and the disk lift 8h manufactured under all operating conditions.

Also the diameter of the push member 48kr and the diameter of the lower portion of the disk lift 8l are with the aforementioned game to the inner diameter of the tube 48kr educated.

The pipe 48kr is bendable, so that it is before or during assembly of the linear ball drive 48k the space of the central mechanics 1 (please refer 1 ) is adaptable. It can also be provided a flexible tube, which may be advantageous, for example, during maintenance. The linear ball drive 48k can preferably be used where, for structural or functional reasons, within wide limits freely selectable mounting location for the sliding-crank mechanism 8g is required.

4b now shows a transport device 58 with the linear ball drive 48k in which a Schraubspindelgetriebe 58s for converting the rotary drive movement of the servomotor 8m is provided in a linear movement. The screw spindle can be driven by a comparatively low-power servomotor because it acts as a power amplifier. However, the power gain is paid at the expense of a larger drive path, ie the output of the servomotor must cover several revolutions to the disk-lift 8l to move from the lower to the upper end position and vice versa. The servomotor may also be a conventional electric motor in this exemplary embodiment, because the lower and / or the upper end position can be detected and maintained, for example, by limit switches. It is therefore not necessary to control the servomotor with angular accuracy.

The screw spindle transmission is further a self-locking gear, ie the disk-lift 8l can not be moved by hand by applying a force along its longitudinal axis. By contrast, the method by hand in the sliding crank gear described above or in a rack and pinion drive readily possible. The rack drive advantageously has a rack with a circular cross-section, because the fit of such a rack in a sleeve with a circular inner cross-section is well controlled and thus represents a cost effective solution.

The screw-jack gearbox 58s is one with the output of the servomotor 8m torsionally connected threaded spindle 58sp and a spindle nut 58m educated. To prevent rotation of the spindle nut 58m is a pen 58st provided the front section of the spindle nut 58m engages and slides in two diametrical slots, leading into the front end portion of the tube 48kr are introduced.

LIST OF REFERENCE NUMBERS

1

Central mechanics

2

separating device

2s

drawer

3a

burner

3b

burner

3c

burner

3d

printer

5

Disk stack

5s

selected data medium

7

holder

7a

gripper

7b

gripper jaw

7h

swivel arm

8th

transport device

8f

guide pin

8g

Slider-crank mechanism

8h

guide sleeve

8k

crank

8l

Disk-Lift

8m

servomotor

8s

bearing pin

8v

annular projection

48

transport device

48k

Linear drive

48kk

Bullet

48kr

pipe

48ks

pusher member

58

transport device

58m

spindle nut

58s

Schraubspindelgetriebe

58sp

screw

Claims (17)

Transport device for disk-shaped, preferably designed as a CD or DVD disk in a device for writing to the disk with at least one burner, wherein the transport device ( 8th . 48 . 58 ) a vertically movable in operating position data carrier lift ( 8l ) having; the disk lift ( 8l ) at its upper portion a bearing surface ( 8v ) for a data carrier ( 5s ) having; the disk lift ( 8l ) is guided in a guide and the data carrier lift ( 8l ) is in engagement with a drive at its lower portion, characterized in that the drive is a slider-crank mechanism ( 8g ) or a rotary drive member and a Schraubspindelgetriebe ( 58s ) or has a rotary drive member and a rack gear or is designed as a linear drive. Transport device according to claim 1, characterized in that the slider-crank mechanism ( 8g ) a rotatably driven crank arm ( 8k ) with an articulated thrust member ( 48ks ), wherein the thrust member ( 48ks ) Is mounted displaceably in a linear guide. Transport device according to claim 2, characterized in that the crank arm ( 8k ) has a resilient fork-shaped portion. Transport device according to claim 3, characterized in that the resilient fork-shaped portion of the crank arm ( 8k ) is formed of spring steel, spring bronze or plastic. Transport device according to one of claims 2 to 4, characterized in that the data carrier lift ( 8l ) is formed at its lower portion as a thrust member which with the crank arm ( 8k ) is hinged. Transport device according to Claim 5, characterized in that the lower section of the data carrier lift ( 8l ) has an axially extending slot-shaped recess which is perpendicular to the axis of the disk-lift ( 8l ) from a pen ( 8s ), which is connected to the crank arm ( 8k ) is engaged. Transport device according to one of claims 2 to 6, characterized in that the crank arm ( 8k ) with the output shaft of a servomotor ( 8m ) is rigidly connected. Transport device according to one of the preceding claims, characterized in that between the slider-crank mechanism ( 8g ) and the data carrier lift ( 8l ) a linear ball drive ( 48k ) is arranged. Transport device according to claim 8, characterized in that the linear ball drive ( 48k ) runs in a curved line. Transport device according to claim 8 or 9, characterized in that the linear ball drive ( 48k ) a tubular guideway ( 48kr ), in which in close packing balls ( 48kk ) are filled movably. Transport device according to claim 10, characterized in that the tubular guideway ( 48kr ) is designed as a bendable tube. Transport device according to claim 10 or 11, characterized in that the inner diameter of the tubular guideway ( 48kr ) by 3% to 5% larger than the diameter of the balls ( 48kk ). Transport device according to claim 10 or 11, characterized in that the output of the Thrust gear ( 8g ) as a rod-shaped push member ( 48ks ) is trained. Transport device according to claim 13, characterized in that the diameter of the thrust member ( 48ks ) by 3% to 5% smaller than the inner diameter of the tubular guideway ( 48kr ). Transport device according to one of claims 10 to 14, characterized in that the lower end portion of the data carrier lift ( 8l ) in the output of the crank gear ( 8g ) facing away portion of the tubular guideway ( 48kr ) intervenes. Transport device according to Claim 15, characterized in that the diameter of the end section is 3% to 5% smaller than the internal diameter of the tubular guide track (10). 48kr ). Transport device according to one of claims 10 to 16, characterized in that the output of the sliding-crank mechanism ( 8g ) facing away from the tubular guideway ( 48kr ) the guide for the data carrier lift ( 8l ).

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