EP0145622A2 - Device to simultaneously dispense and cut off strips of coiled materials, with at least one roll of material in use - Google Patents

Abstract

A serrated cutting member is produced in two parts (7a1) and (7a2) and is slidably housed in a support member (7) pivotally mounted in the drum (3) for driving the material, and cooperating with means (4c ) ensuring the periodic projection of the cutting member from the drum for the purpose of cutting the material, this in order to allow adjustment of the space between the parts of said member on the one hand for the passage of a means of transmission of rotational movement between the drum and a safety member (38) positioned at the opening of the passage of the strip or strips of material distributed and, on the other hand, to adjust the width of the uncut line of the band due to the absence of a tooth at this location.

Description

The invention relates to the technical sector of means for distributing determined lengths of strips wound on a reel or core. In particular, but not limited to, the invention applies to apparatus for the simultaneous distribution and cutting of paper, wadding and other wiping materials.

The apparatus according to the invention is of the well-known type according to which the roll of material in service mounted with free rotation on a support, is applied under pressure directly to a drum with non-slip surface, so that by simple manual traction on the strip of material overflowing from the device, a strip whose length is substantially equal to the diameter of the drum is automatically dispensed and cut by a serrated cutting device associated with the drum and protruding from the drum when driven in rotation by pulling 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, and a new strip of material overflows from the device.

Some devices of this type receive at least two rolls of material which can be put into service successively automatically as soon as the first roll is almost empty. Other devices only receive a roll of material; in this case it is therefore necessary to recharge the device more frequently.

We understand that with a device with a single roll of material, there are feeding problems. Indeed, the person in charge of the supply can either replace the roll if it is almost empty, or leave it in place if too much material remains. It is obvious that in the first case, there is waste of material, while in the other case, the device is quickly empty.

The present invention aims to remedy these drawbacks. The invention, as characterized in the claims, solves the problem of creating an apparatus for the simultaneous distribution and cutting of strips of material in rolled with one or more rolls of materials in service of the aforementioned type including special provisions ensuring reliable loading, rapid and simplified loading, and avoiding wastage of material.

For this purpose, the apparatus is equipped with a support or element for receiving and locking with free rotation of the roll in service when it is almost empty, allowing the automatic and simultaneous distribution and cutting of the lengths of strips remaining in this roll, and lengths; of strips of a second roller positioned on its support, and applied under pressure to a drum with an anti-slip surface which is rotated by traction on the two strips of material projecting from the apparatus, to ensure the cutting of said strips by the serrated cutting member associated with the drum.

The serrated cutting member is made in two parts and is slidably housed in a support member pivotally mounted in the material drive drum and cooperating with means ensuring the periodic projection of the cutting member from the drum in view. cutting the material, this to allow adjustment of the space between the two parts of said member on the one hand for the passage of a means of transmitting the rotational movement between the drum and a safety member positioned at the level of the opening for passage of the strip or strips of material distributed and, on the other hand, to adjust the width of the uncut line of the strip due to the absence of a tooth at this location.

• La figure 1 est une vue en coupe montrant un appareil à deux rouleaux de matériau équipé d'un organe de coupe en deux parties et d'un moyen de transmission du mouvement entre le tambour et l'organe de sécurité.
• La figure 2 est une vue en plan et en coupe considérée suivant la ligne 2-2 de la figure 1.
• La figure 3 est une vue en coupe à plus petite échelle illustrant un appareil à un rouleau de matériau équipé d'un organe de coupe en deux parties, d'un moyen de transmission entre le tambour et l'organe de sécurité, et d'un support de rouleau presque vide.
• La figure 4 est une vue en perspective illustrant un organe de coupe en deux parties et son support.
• La figure 5 est une vue de face capot enlevé représentant un appareil à un rouleau de matériau correspondant à la figure 2.
• La figure 6 est une vue en perspective partielle montrant une des parties du support de rouleau presque vide conforme à la figure 3.
• La figure 7 est une vue partielle en coupe illustrant 1' organe de coupe en deux parties et un aménagement de la surface du tambour empêchant le glissement des deux épaisseurs de bandes débitées par deux rouleaux.

The invention is set out below in more detail with the aid of the drawings showing only one embodiment.

• Figure 1 is a sectional view showing an apparatus with two rolls of material equipped with a two-part cutting member and a means of transmitting movement between the drum and the safety member.
• FIG. 2 is a plan view and in section seen along line 2-2 of FIG. 1.
• Figure 3 is a sectional view on a smaller scale illustrating an apparatus with a roll of material equipped with a gold two-part cutting gane, a means of transmission between the drum and the safety device, and an almost empty roller support.
• Figure 4 is a perspective view illustrating a two-part cutting member and its support.
• FIG. 5 is a front view of the cover removed showing an apparatus with a roll of material corresponding to FIG. 2.
• FIG. 6 is a partial perspective view showing one of the parts of the almost empty roll support according to FIG. 3.
• Figure 7 is a partial sectional view illustrating one cutter in two parts and an arrangement of the surface of the drum preventing the sliding of the two thicknesses of strips delivered by two rollers.

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 non-limiting example, a device for simultaneous distribution and cutting of the type which has been the subject of a Patent Application No. 83.00737 and a Certificate of Addition N ° 80.10533 of which the depositor is also the holder.

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 of a drum (3), an eccentric (4c) suitably oriented and dimensioned to control the pivoting a blade holder (7) articulated in (8) on the side walls of the drum, in order to periodically obtain the projection of a blade (7a) out of the drum having for this purpose an opening (3a).

An automatic roller replacement device in use is provided in this case in order to increase the capacity of the device. This device comprises, from a rigid structure (14), a support (16), the free ends of the arms (16b) of which carry plates (16c) with cradles (16d) for receiving and positioning the roller with free rotation. material (Rl), this by means of pins (Tl) which are formed on end pieces (El) centered in the coil or core for winding the ma material.

A support (18) whose free ends of the arms (18b) form cradles (18c) for receiving and positioning pins (T2) formed on end pieces (E2) which are centered in the coil or core of a roller ( R2) of material to be dispensed.

The two supports (16 and 18) are interconnected by a link (19) which is articulated at (20) on the support (18) and on a pin (21) fixed on the support (16) via 'an oblong opening (19a) of the link.

The arms of the two supports (16 and 18) are precisely dimensioned and spaced apart so that by the action of the connecting rod (19), the free ends forming the cradles (16d - 1.8c) can cross .

An articulated lock (23) intended to hold the support (18) in the raised position, is connected to a connecting rod (25), the other end of which is articulated with play on the support (16).

In the lower opening of the device, there is arranged a body ensuring the firm guiding of the strip (s) cut without the possibility of passing elsewhere than between this member and the inclined wall (la) and also avoiding the involuntary engagement of the fingers. of the user.

For this, a shaft (38) is mounted for free rotation at the lower opening and parallel to the axis of the drum. In its middle part, the shaft has a groove (38a) intended to receive a belt (39) or similar transmission means, which is wound around the drum (3) having for this purpose a groove (3c) for guiding and belt housing. It is not excluded to provide several belts or similar means in the length of the drum and the shaft.

It is understood in particular by looking at FIG. 1, that the central belt if it avoids the passage of the strips between the shaft (38) and the drum (3), does not allow the free projection of the cutting blade (7a) out of the drum. Poub obviate this drawback, it was planned, as illustrated in particular in Figures 4 and 7, to execute said blade in two parts (7al - 7a2). These two parts are inserted in a support (7) or blade holder comprising, for example, a squared rear profile (7b) against which the two blade parts also squared, and a front section (7c) of height corresponding substantially to the side of the bracket (7b) carrying the hinge pins (8). The two sections (7b - 7c) are spaced apart from each other to retain the half-blades and possibly allow their displacement with just sliding. The rear section (7b) is notched in (7bl) at the level of the passage of the belt (39), and it has laterally on its rear face an eye (71) 2) for hooking a spring (40) for returning the blade holder in the half blade removal position, after cutting.

It is understood that if the spacing (e) between the two serrated half-blades is large and corresponds to a tooth, the strip of material delivered may not be cut at this location, in particular when the user does not pull with sufficient force on this strip.

It is therefore desirable to adjust this spacing to a minimum by moving the half-blades and to provide these half-blades with the end teeth very close to the end considered in order to partially compensate for the absence of a central tooth.

However, in certain use cases, it may be advantageous for the strip of material to still hold by a central point.

The transmission member (39) therefore has a double function, namely: guiding the material towards the opening and closing the passage between the drum (3) and the shaft (38).

According to another characteristic of the invention, illustrated in FIGS. 3, 5 and 6, applied to a device with a single roll of material of the type which has been the subject of previous patent protection, of which the applicant is also the holder, provided a device for receiving the roll when it is almost empty, making it possible to release the support (41) from the new roll (R3), and to avoid wasting the almost empty roll (R4) by distributing the two strips of material until this last roll is used up.

For this, we fix by any means on a protective flange (42), squared tabs (43) on which are fixed, permanently or detachably inclined support arms (44) of material with elastic capacity intended for receive by elastic spacing and by slides (44a), the pins (T4) formed on the ends of the coil of the roller material. At the bottom of the slides, an orifice (44b) is provided for positioning the journals with free rotation.

It is understood that when the person designated for loading the device is in the presence of a roller (R4) where there are only a few lengths of tape to distribute, it suffices to remove this roller from the support (41 ) and to position it in the support arms (44), its free band being always wound on the drum (3) and projecting under the device. It then has a new roller (R3) in the receiving shapes (41a) of the support (41) with its free strip oriented towards the rear.

When a user pulls the protruding tape from the roller (R4), the free tape from the roller (R3) will automatically be drawn towards the lower opening of the device. Until the roller (R4) is empty, two lengths of overlapping strips will thus be distributed and cut. Note that the elastic tightening exerted by the support arms (44) on the end caps of the roller (R4) prevents any formation of folds in the strip of this roller when the overhanging strips are pulled.

To avoid possible slippage one on the other of the two thicknesses of bands, provision is made to add to the roughness of the periphery of the drum (3), hooking projections at least in one zone located near the opening of the drum.

These projections may consist, for example, of a series of spikes or pins (3d) executed directly and by any known means on the drum (FIG. 7).

Of course, these projections can be produced both for devices with a roller of the type according to FIG. 3, and for devices with several rollers and with automatic replacement of the rollers, corresponding to FIG. 1.

The advantages are apparent from the description.

We also recall the reliability and safety of the device obtained by guiding the strips of material and the partial sealing of the lower opening avoiding the introduction of the fingers.

The invention is in no way limited to that of its modes of application any more than to those of the embodiments of its various parts which have been more particularly indicated; she in on the contrary embraces all variants.

Claims (5)

-1- Apparatus for the simultaneous distribution and cutting of strips of coiled material, with at least one roll of material in service, of the type according to which the roll of material in service mounted with free rotation on a support, is applied under pressure directly to a drum with a non-slip surface, so that by simple manual pulling on the strip of material overflowing from the device, a strip whose length is substantially equal to the diameter of the drum is automatically dispensed and cut, by a cutting device serrated associated with the drum and protruding from the drum when it 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, and a new strip of material overflows from the device; the device is characterized in that it has a serrated cutting member produced in two parts (7al) and (7a2) and housed in sliding manner in a support member (7) pivotally mounted in the drive drum (3) of the material, and cooperating with means (4c) ensuring the periodic protrusion of the cutting member from the drum for the purpose of cutting the material, this in order to authorize an adjustment of the space between the parts of said cutting member. a part for the passage of a means (39) for transmitting rotational movement between the drum and a safety member (38) positioned at the opening of passage of the strip or strips of material distributed and, on the other hand, to adjust the width of the uncut line of the strip due to the absence of a tooth at this location. -2- Apparatus according to claim 1, characterized in that it is equipped with a support (44) or free rotation receiving and locking element of the roller in use (R4) when it is almost empty, allowing the automatic and simultaneous distribution and cutting of the lengths of strips remaining in this roller, and of the lengths of strips of a second roller (R3) positioned on its support, and applied under pressure to a drum (3) with anti-slip surface which is rotated by traction on the two strips of material projecting from the device reil, to ensure the cutting of said strips by the serrated cutting member (7a) associated with the drum. -3- Apparatus according to claim 2, characterized in that the support or element for receiving and locking the almost empty roller consists of two support arms (44) of elastic capacity material fixed in an inclined manner on squared legs ( 43) secured to a protective flange (42) mounted in front of the drum (3); slides (44a) authorizing the guiding of trunnions (T4) equipping the ends of the coil of the roller, and orifices (44b) formed at the bottom of the slides, ensuring the positioning and locking with free rotation of the trunnions of the roller, with clamping elastic avoiding the formation of folds during pulling on the overflowing strips of material. -4 Apparatus according to claim 1, characterized in that the drum (3) for driving the free strips of material to be dispensed, has on its periphery, in addition to a non-slip surface, hooking projections (3d) intended to avoid the sliding, relative to each other, of the free strips pulled on two rollers at the same time. -5- Apparatus according to claim 1, characterized in that the means for transmitting the movement between the shaft (38) partially closing the lower opening for passage of the strips, and the drum (3) consists of at least one belt (39) or the like, guided in central grooves (3c and 38a) of the drum and the roller; this transmission member having a double function, namely: preventing the unexpected passage of the bands between the drum and the shaft, and forcing them to move towards one lower opening of the device.

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