EP0192591A1 - Apparatus for the distribution and simultaneous cutting of wound sheet material - Google Patents

Abstract

To eliminate any resistance to distribution, provision has been made for a combination of several devices: an elastic means (31) acting on a movable stop (24) in order to authorise the stopping of the drum (3) after cutting, regardless of the tensile force on the excess strip, and the detachment of the said strip held by a central point created by the toothed blade (4a); a cam (16) defining the path of the cutting blade; an elastic means (32) with an adjustable position, which is intended to guide the material wound on the drum towards the exit without braking it; a device (10-35) for bringing into service a new roll by driving the drum in rotation from a cap or from the lower opening of the apparatus. <IMAGE>

Description

The invention relates to an apparatus for simultaneously distributing and cutting strips of wound material.

The object of the invention relates to the technical sector of the means of distributing lengths of material wound on reels. In particular, but not exclusively, the invention applies to paper dispensing devices; wadding and similar wiping materials.

The apparatus according to the invention is of the type according to which a roll of wiping material, mounted with free rotation on a wall support, is applied under pressure directly to a drum with non-slip surface, so that by simple manual pulling on the strip of material overflowing from the device, a strip is distributed and detached automatically, the length of which is substantially equal to the diameter of the drum, by a serrated cutting device associated with the drum and cooperating with a cam to project out of the drum in an arc when the said drum is rotated by traction on the material, so as to penetrate the material thus stretched on either side of the cutting device. After cutting, the launched drum returns to its initial position through the action of various complementary members, such as a parachute, ratchet, stops, arranged on the drum and on the support; a new strip of material automatically overflows under the machine after cutting.

According to the invention, we wanted to further improve the operation and simplify the mechanisms of this type of device which has been the subject of several patent or certificate of addition filings of which the depositor is also the holder, in particular the Requests 83.19815 and 84.04695.

To this end, and according to a first characteristic implemented to eliminate any resistance to distribution which would be harmful in the case of thin hand towel materials when the material is pulled with wet hands, provision has been made to combine multiple devices between them, namely an elastic means acting on a movable stop to authorize the stopping of the drum after cutting whatever the pulling force on the overflowing strip and the detachment of said strip maintained by a central point created by the serrated blade ; a cam defining the trajectory of the cutting blade and which is mounted on the wall support with the possibility of adjusting its position to modify the characteristics of the trajectory as a function of the type of material to be cut; elastic means with adjustable position which is intended to guide the material wound on the drum towards the lower outlet of the device without braking it in the case of thin materials a device for putting into service a new roller for training in rotation of the drum from the lower opening of the device and from a material guide roller.

These characteristics and others will emerge from the description which follows.

• La figure 1 est une vue en coupe illustrant à titre d'exemple seulement un appareil de distribution et de coupe susceptible de recevoir les dispositions caractéristiques conformes à l'invention.
• La figure 2 est une vue de face, capot enlevé, de l'appa; reil selon figure 1.
• La figure 3 est une vue en coupe considérée suivant la ligne 3-3 de la figure 2, montrant les principaux dispositifs selon l'invention.
• La figure 4 est une vue en coupe considérée suivant la ligne 4-4 de la figure 3, illustrant la came à position règlable.
• La figure 5 est une vue en coupe considérée suivant la ligne 5-5 de la figure 2, montrant la butée mobile d'arrêt du tambour après la coupe et la lame de coupe en position repos.
• La figure 6 est une vue partielle en coupe montrant une variante du dispositif de mise en service du rouleau neuf, avec en traits interrompus la position du dispositif au repos:

To fix the subject of the invention, without however limiting it, in the appended drawings:

• Figure 1 is a sectional view illustrating by way of example only a distribution and cutting device capable of receiving the characteristic arrangements according to the invention.
• Figure 2 is a front view, cover removed, of the unit; reil according to figure 1.
• Figure 3 is a sectional view taken along line 3-3 of Figure 2, showing the main devices according to the invention.
• Figure 4 is a sectional view taken along line 4-4 of Figure 3, illustrating the adjustable position cam.
• Figure 5 is a sectional view taken along line 5-5 of Figure 2, showing the movable stop stop of the drum after cutting and the cutting blade in the rest position.
• FIG. 6 is a partial sectional view showing a variant of the device for putting the new roller into service, with broken lines the position of the device at rest:

In order to make the object of the invention more concrete, it is now described in nonlimiting embodiments illustrated in the figures of the drawings.

Illustrated in Figures 1 and 2, by way of example, an apparatus of the type which has been the subject of the aforementioned Patent Applications No. 83.19815 and 84.04695 of which the applicant is also the owner, it being understood that the invention can apply to other types of apparatus with one or more rolls of material to be cut.

The main elements of this device are briefly recalled.

The device comprises, from a base plate (1) for wall mounting, support means (2) with free rotation for a drum (3) having inside a blade holder (4) articulated in ( 5) on a side wall of the drum, and having on the outside a follower roller (18) cooperating with a fixed cam to allow the periodic exit of a serrated cutting blade (4a) outside the drum, when pulling on the strip of material overflowing under the device, thereby rotating the rough-surface drum on which the roll (RI) of material is applied, carried by a support bracket (6) articulated at (7) on the base plate .

It can also be seen (FIG. 1) that the device has a deflector plate extending in front of the drum and carrying fixedly or detachably inclined support arms (8) made of material with elastic capacity to receive by spacing and on slides ( 8a), journals (9a) formed on end caps (9) which are engaged in the core of the roller. Thus, when the roll of material is almost empty, it can be placed by its pins in the holes (8b) formed at the bottom of the slides, and a new roller can be put in place on its support bracket (6). In this way, the distribution can take place continuously from one roll to another, the two strips of material being distributed simultaneously until the first roll is finished.

According to a first characteristic of the invention, the drum is mounted for free rotation on one side by an axis (12) journalled in one of the supports (2) integral with a flange (la) of the base plate (1) , while opposite the drum has an axis (14) journalling in a bearing (15) made integral with the other support (2) by indexing and screwing a stepped plate (15a) of the bearing which is eccentric relative to the bearing. Between the support (2) and the plate is interposed and centered a parachute (19) which is thus mounted to oscillation controlled by a spring (26) attached to a fixed point of the flange (lb) of the base plate (Figure 2) .

The plate (15a) on the side opposite the side wall of the drum, carries a cam (16) comprising a concave part (16a) which can be applied against the external cylindrical bearing of the bearing, and two different convex profiles (16b - 16c ) joining opposite the concave part. These two profiles respectively defining the protruding path out of the drum (3) of the cutting blade, and the retraction of said blade in the drum, by pressing the follower roller (18) on said profiles during the rotational drive. of the drum.

Depending on the quality of the wiping material, it has been found advantageous to modify the amplitude of the path of the blade. For this, provision has been made for adjusting the cam relative to the bearing (15). To this end, said cam is fixed to the plate by a screw (29) accessible from the outside and passing through said plate by an oblong opening (15b) oriented so as to move the cam away from or closer to the bearing or axis of rotation of the drum (Figure 3).

On the parachute (19) is pivotally mounted by an end mite in (20), a pawl (21) which is normally supported by gravity or by means of a pin spring (30). on a stop (22) integral with the parachute. On the other hand, on the side wall of the drum is provided projecting near its periphery a finger (23) and; closer to the axis of rotation of the drum, a stop (24) articulated at (25) inside the wall which it crosses through an opening in an arc of a circle (3c), and of which the projecting part (24a) can cooperate temporarily with the stop (22) as will emerge from the following description. It can also be seen that on the periphery of the plate (15a) is fixed an elastic capacity blade (31) extending in the direction of the stop (22) and on which the movable stop (24) is supported during the rotation of the drum, under conditions which are explained below.

According to another characteristic illustrated in FIG. 1, the material wound on the drum (3) with non-slip surface, is guided in the direction of the lower dispensing opening. However, depending on the quality of the material, this guide must be more or less firm, that is to say that in the case of thin or fragile material, the guide must be practically neutralized so as not to slow the progress of the material.

To this end, the guide device already known from a previous request by the depositor, and comprising an elastic means (32) of the spring type wound in contiguous turns integral with the base plate (1) to extend behind the drum, is fixed to said plate by a screw (33) passing through an offset tab (32a), with interposition between the plate and the tab of a return spring (34). In this way, by screwing or unscrewing the screw, the head of which rests on the tab, the elastic means (32) can be moved aside or brought closer to the drum, thus allowing the material to pass more or less freely.

According to another characteristic illustrated in FIGS. 1 and 2, the positioning and the dimensions have been modified a roller (10) used in a previous request by the depositor to correctly guide the material towards the lower opening and to avoid the introduction of the user's fingers near the cutting blade, this in order to use this roller to ensure in a rational and convenient way, loading and commissioning of the device in roll of new material.

For this, the roller (10) is of larger diameter and mounted for free rotation between the flanges (la - lb) near the lower opening to extend widely outside. In its central part, the roller carries a grooved pinion (10a) of smaller diameter. on which is wound a notched belt (11) connecting said roller to the drum (3) on which it is wound in a central groove (3b) which preferably has a complementary notching (3d) at least along a sector of the circumference .

As already described in a previous request from the depositor, the cutting blade (4a) is produced in two distinct parts mounted in their support (4) with the possibility of adjusting the interval (e) between them, this for let the belt pass and to obtain a central point of variable resistance depending on the quality of the material distributed, since there is no tooth at this location.

Of course, the toothed belt-grooved pinion assembly of the drum can be replaced by any other equivalent means of transmission.

Illustrated in Figure 6, an alternative embodiment of the device for commissioning a new roller adapted to the distribution of very fragile materials for which the drive of the drum by the roller (10) and the belt. notched (11) is not soft enough.

We see that the cover (36) has on either side of an opening (36a), squared legs (36b) with on the branches facing oblong openings (36c) in which the axis can move overflowing (35a) with roller (35) whose diameter is calculated to be partially projecting in the opening (36a) of the cover. The legs (36b) are oriented so that by gravity, the roller (35) is at rest in support by its axis at the bottom of the openings (36c), then leaving a space between its periphery and the drum. When you want to bring the free strip of a new roller, towards the lower opening of the device, it is enough to exert with the hand a pressure from top to bottom (arrow FI) on the roller so that it rests on the drum and drives it in rotation. Preferably, the surface of the roller is equipped with projections (roughness, grooves, ridges ...) in order to drive without slipping.

The operation of the apparatus will now be described with reference to the various figures in the drawings.

We assume the device is almost empty. The person responsible for feeding it places a new roller (R1) in the correct direction on the support bracket (6) after having possibly placed the almost empty roller (R2) on the inclined support arms (8). Then he closes the cover of the device and with the inside of his hand, he rotates the roller (35) (arrow F1) or the roller (10) projecting under the device (arrow F2), which has the effect of driving the drum in the same direction and thus, automatically bringing a strip of material into the lower opening where it falls naturally in his hand to be pulled.

At this time, and as explained below, the drum is blocked under the action of the various mechanisms implemented during this operation. To obtain a new strip of material the length of the circumference of the drum, the user then manually pulls on the overflowing strip, which causes the drum to rotate due to the direct support of the roll of material on it and of the non-slip surface of the drum.

The rotation of the drum, therefore of the cutting blade holder (4) forces its follower roller (18) to run through the upper profile (16b) of the fixed cam (16), and the blade is cut out of the drum when the opening (3a) of the drum has passed behind the roll of material (Rl). The serrated cutting blade then penetrates the tensioned material on both sides while continuing to rotate with the drum. This penetration combined with the rotation allows the net detachment of the material except in the central zone where there is no tooth.

Then the drum continuing to rotate, the blade retracts into said drum because the roller (18) follows the lower profile (16c) of the cam.

During this action, the finger (23) projecting from the drum engages between the fixed stop (22) of the parachute and the end of the pawl (21) by lifting it, while at the same time, the movable stop (24) projecting from the drum, goes into the high position in the opening (3c) to follow the elastic blade (31) and come to bear against the stop (22) of the parachute, which has the effect of stopping the rotation of the drum and therefore detach the central area by resistance.

The support of the mobile stop (24) against the fixed stop (22) caused the parachute (19) to oscillate relative to its spring (26) and by reaction, the mobile stop (24) falls by gravity into the low position in the opening (3c), against the elastic blade (31), thus escaping from the stop (22). A stop (27) integral with the parachute then bears against a stop (28) fixed on the flange (lb) and the finger (23) is replaced against the pawl (21) which has fallen on the stop (22).

The device is then ready for a new pull of the strip of material because in the complementary rotation of the drum after cutting, a strip of material has come into overflow under the device.

• - La douceur de fonctionnement obtenue et la coupe franche sans résistances néfastes, avec les règlages de came, de guidage ajusté du matériau vers la sortie, et la suppression des moyens de lancement du tambour après la coupe par emmagasinage de forces, cela avec des matériaux de toutes qualités (ouate, hydrocel...) et d'épaisseurs variables qui sont généralement tirés avec les mains mouillées.
• - Le chargement et la mise en service rapide et rationnelle de l'appareil par une manoeuvre simple du rouleau inférieur qui permet d'avoir la bande de matériau directement dans la main, ou du galet traversant le capot.
• - La simplification de l'appareil par diminution du nombre de pièces et de leur montage, débouchant sur un prix de revient abaissé par rapport aux appareils antérieurs, et également un poids et un encombrement réduit.

The advantages clearly emerge from the description, it is emphasized in particular:

• - The smooth operation obtained and the clean cut without harmful resistance, with the adjustments of cam, mistletoe adjusted dage of the material towards the exit, and the suppression of the means of launching the drum after the cut by storage of forces, that with materials of all qualities (wadding, hydrocel ...) and of variable thicknesses which are generally pulled with wet hands.
• - The fast and rational loading and commissioning of the device by a simple operation of the lower roller which allows to have the strip of material directly in the hand, or of the roller passing through the cover.
• - The simplification of the device by reducing the number of parts and their assembly, resulting in a lower cost price compared to previous devices, and also a reduced weight and size.

The invention is in no way limited to that of its modes of application any more than to those of methods of realizing its various parts having been more particularly indicated; on the contrary, it embraces all its variants.

Claims (7)

- ₁ - Apparatus for the simultaneous distribution and cutting of strips of wound material, with at least one roll of material in service, of the type in which the roll of material in service mounted with free rotation mounted on a wall support, is applied directly under pressure on a drum with non-slip surface, so that by simple manual pulling on the strip of material overflowing from the device, a strip is distributed and automatically detached, the length of which is substantially equal to the diameter of the drum, this by a device for serrated cut associated with the drum and cooperating with a cam to project out of the drum in an arc when the said drum is rotated by traction on the material, so as to penetrate the material thus stretched on both sides other, of the device of. chopped off ; after cutting, the launched drum returns to its initial position through the action of various complementary members such as a parachute, ratchet, stops, arranged on the drum and on the wall support; a new strip of material automatically overflows under the device after cutting; the apparatus is characterized in that, in order to eliminate any resistance to distribution which would be harmful in the case of thin hand towel materials when the material is pulled with wet hands, provision has been made to combine several devices between them, namely: an elastic means (31) acting on a movable stop (24) to authorize the stopping of the drum (3) after cutting whatever the pulling force on the overflowing strip, and the detachment of said strip maintained by a central point created by the serrated blade (4a); a cam (16) defining the trajectory of the cutting blade and which is mounted on the wall support with a possibility of adjusting its position to modify the characteristics of the trajectory as a function of the type of material to be cut; elastic means (32) with adjustable position which is intended to guide the material wound on the drum towards the lower outlet of the device without braking it in the case of thin materials; a device (10 - 35) for commissioning a new roller by driving the drum in rotation from a cover or from the lower opening of the device. .. -2- Apparatus according to claim 1, characterized in that the elastic means acting on the movable stop (24) is a blade (31) integral by one end with a fixed part of the apparatus such as the plate (16a) , for indexing the cam (16) on the support, and extending near a stop (22) established on a parachute (19), in order to bring the mobile stop necessarily during the rotation of the drum (24) against the stop (22) to stop the drum after cutting, before by reaction of the oscillating parachute, said stop (22) returns by gravity to the release position of the drum for a new traction on the material. -3- Apparatus according to claims 1 and 2 together, characterized in that the locking of the drum (3) by pressing the movable stop (24) against the stop (22) in combination with the creation of an adjustable central zone of strip of material not cut by the blade (4a) in two parts which has no tooth at this level, offers sufficient resistance to completely detach the strip without risk of further unwinding thereof. -4 Apparatus according to claim 1, characterized in that the cam (16) which is traversed by a follower roller (18) integral with the cutting blade (4a) to operate by its upper profile (16c) the projection of the blade out of the drum (3) for cutting and by its lower profile (16c) the withdrawal of the blade in the drum after cutting, has a concave part (16a) engaging around the outer cylindrical surface of a rotation mounting bearing (15) free of the drum, and is fixed by a screw (29) accessible from the outside and passing through an eccentric plate (15a) of said bearing by an oblong opening (15b) oriented so as to spread or bring the cam closer to the bearing, by modifying thus the amplitude of the trajectory. -5- Apparatus according to claim 1, characterized in that the elastic means for guiding the material wound on the drum (3) towards the lower outlet of the apparatus, and consisting for example of a spring with joint turns (32) integral with an offset tab (32a) fixed to the base plate (1) and the position of which relative to the rear part of the drum can be modified according to the quality of the wiping material by a member such as a screws (33) whose head rests against the tab (32a) and whose threaded rod cooperates with a tapped hole in the base plate; with interposition of a return spring (34) between the tab and the plate. -6- The apparatus of claim 1, comprising a device for commissioning a new roller consisting of a roller (10) mounted for free rotation on the flanges (la - lb) of the wall support and parallel to the axis of the drum, below it and near the lower opening for the passage of the material, characterized in that said roller is positioned so that a large sector of its circumference is in overflow in order to be driven manually from the 'interior of the hand and, consequently driving the drum (3) by central connection of the toothed belt type (11), grooved pinion (lOa) on the roller, and partially grooved central groove (3b) on the drum; the drive of the drum causing the unwinding of the strip of material of the new roller positioned above the drum. , -7- Apparatus according to claim 1, comprising a device for commissioning a new roller, by driving the drum (3), characterized in that it is constituted by a roller (35) preferably with anti- slide which is mounted with free rotation and adjustable positioning with respect to the cover (36) to be moved away from the drum during the use of the device, and to be in direct engagement with the drum for the purpose of putting the roller into service new by manual action on the roller accessible by an opening (36a) of the cover, in order to drive the drum in rotation and to bring a strip of material towards the lower opening of the device.

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