FR2583729A1 - Simplified apparatus for simultaneously delivering and cutting strips of wound materials with automatic changing of the roller in use - Google Patents

Abstract

The apparatus is noteworthy in that the driving drum 3 incorporating the cutting member is mounted transversely with free rotation between front and rear walls 1a-1b of the casing 1 and the roll of material for use is simply placed onto the drum, thereby also bearing in a rolling manner on a cylinder 16 which can rotate with respect to the said walls; the free strip to be drawn out extending under the apparatus after having been wound onto the drum and having been passed between two idler rolls 14-15 and an opening 1e of the casing; a device 18 which is sensitive to the weight of the almost-empty roll of material, pivots when the said roll is able to pass between the drum and the rotary cylinder in order to be received in a magazine 30 and actuates the automatic installation of a new roll retained up to that moment in the upper part of the apparatus; a profiled member traverses the drum in order to interact alternately with one or other of the front or rear walls of the casing so as to stop the drum after the cutting operation and to place the drum back in the standby position.

Description

 The invention relates to a simplified apparatus for the simultaneous distribution and cutting of strips of wound material, with automatic change of the roll in service.

 The object of the invention relates to the technical sector of the means for distributing determined lengths of strips wound on 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 is preferably applied by pressure directly to a drum with an anti-slip surface, so that by simple manual pulling on the strip of material overflowing with the 'device, automatically distributes and cuts a strip whose length is substantially equal to the diameter of the drum, this by a serrated cutting device which is associated with the drum and protrudes 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 by means of complementary members, and a new strip of material overflows from the device.

 In certain cases of use of this type of device, it is necessary to install space-saving devices at depth, distributing strips of narrow width from large diameter rollers, and allowing the automatic change of rollers.

 To meet these requirements, a new simultaneous cutting and dispensing device has been created from the drive drum with an anti-slip surface, in which the cutting member moves as indicated above.

 According to the invention, the drive drum incorporating the cutting member is mounted transversely with free rotation between front and rear walls of the casing, and the roll of material in service is simply placed on the drum while also being in contact with rolling on a rotary cylinder with respect to said walls; the free strip to be pulled overflowing under the device after being wound on the drum and having passed between two idle rollers and an opening of the casing; a device sensitive to the weight of the roll of almost empty material, pivots when said roll can pass between the drum and the rotary cylinder to be received in a store, and controls the automatic positioning of a new roll retained hitherto in the part top of the device; a profiled member passes through the drum to cooperate alternately with one or the other of the front or rear walls of the casing, in order to stop the drum after cutting and to return the drum to the standby position.

 These characteristics and others will become apparent from the description which follows.

To fix the subject of the invention without however limiting it, in the accompanying drawings
Figure 1 is a perspective view illustrating the apparatus according to the invention with the cover open.

 Figures 2 and 3 are; heads showing respectively the front and rear faces of the device.

 Figure 4 is a cross-sectional view taken along line 4-4 of Figure 5.

 FIG. 5 is a plan view and in section seen along line 5-5 of FIG. 4.

 Figure 6 is a sectional view taken along line 6-6 of Figure 4, showing the rear face of the drum.

 Figure 7 is a plan and sectional view taken along line 7-7 of Figure 6, illustrating the drum stop phase after cutting.

 Figure 8 is a sectional view taken along line 8-8 of Figure 4, showing the front face of the drum.

 FIG. 9 is a plan view and in section taken along line 9-9 of FIG. 8.

 FIG. 1C is a partial view seen along arrow F in FIG. 8.

 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.

 The apparatus illustrated in particular in Figure 1 comprises a wall casing (1) formed for example of a complete rear wall (la) with wall fixing means, a front wall (lb) limited to the lower part, two side walls (lc), and a bottom; the whole being closed by a hood (2) with lock.

 Below the bottom (ld) is mounted with free rotation between the front and rear walls, a drum (3) of diameter (D) executed in several assembled parts, so as to constitute an envelope (3a) and two flanges (3b- 3c). An opening (3d) is made in the envelope to allow passage to a serrated cutting blade (4) carried with free rotation in (5) on the flanges by a blade holder (4a) at right angles, the middle part or angle of the square, door on the side opposite the rear flange (3b) a profiled projection (4b) passing through said flange by an opening in an arc (3c) to bear on a cam (6) fixed to the wall (Ia) radially adjustable relative to the axis (3e) of rotation of the drum (Figure 6).

 In contrast, the drum has an axis (3f) passing through the front wall (lb) of the casing, and receiving at the end an operating button (7).

 Inside the drum, is arranged parallel to the axis of rotation a bar (8) of length slightly greater than that of the drum, so that in an operating position the end (8a) of the bar rests in an opening (3g) of the flange (3c) while not protruding outside, while the other end (8b) passes through an opening (3h) of the flange (3b) projecting until near the rear wall (la) of the casing (FIG. 5).

 As explained below, in another operating phase, it is the end (8a) which projects beyond the outside of the drum, while the end (8b) is retracted, this in order to cooperate alternately with a stop (9) secured to the rear wall (la) or with a ramp (10) secured to the front wall (lb).

 In said operating phases, the bar (8) also cooperates by a projection (8c), with a stop (11) located inside the drum, and a spring (12) suitably arranged recalls the bar in the stop position.

 As far as the drum (3) is concerned, it can also be seen that it has in the center a peripheral groove (3i) for housing a strap (13) which is wound in a groove (14a) established in the center of a lower roller ( 14) carried with free rotation by the front and rear walls of the casing. Another similar roller (15) is mounted in the same way next to the first, leaving between them sufficient space for the passage of the material to be dispensed but too weak for the accidental passage of the user's fingers, in order to avoid their possible contact with the cutting blade during its rotation. The.

rollers (14 and 15) are preferably fixed in slight overflow in the opening (the) of the bottom of the housing to be actuated as needed.

manually.

 The first roll (R1) of material to be cut is simply placed on a composite cradle. of three elements, namely: the drum (3), a rotary cylinder (16) brought to free rotation on the front and rear walls of the housing, and a deflector (17) integral with a side wall (lc) of the housing.

 In front of the cylinder (16) is arranged a pallet (18) whose end arms (18a) (18b) are articulated at (19) on the front and rear walls of the casing, near the axis of rotation of the cylinder ; while the middle part (18c) extends directly from the drum. On the side of the rear wall of the casing, the arm (18b) has an ovalized opening (18d) cooperating with a finger (20a) carried by a vertical rod (20) rising towards the upper part of the wall (la) of the casing. being guided with play by a stirrup (21) or similar means (Figure 3). A spring (22) connects the finger (20a) to a lower fixed point on the housing to bring the rod (20) down and the pallet (18) in the high position, due to the eccentric position of the finger (20a) by relative to the points of rotation (19) of the pallet.

 At the upper part, the rod (20) has a recess (20b) to pass next to a projection (1f) of the wall Cii casing on which a hook (23) articulated at (2b) to said wall, and whose active end (23a) retains in normal position an overflow part (24a) formed on an inclined flap (24) which is articulated at its opposite end at (25 and 26) on the walls of the casing (Figures 1 and 3).

 It can be seen that the projecting part (24a) of the flap crosses an opening in an arc (lg) of the wall of the casing, and that a finger (24b) of the flap located near its upper articulation (26) also crosses an opening in an arc (lh) of the wall; this finger being connected to the hook (23) by a spring (27).

 As can be understood, the flap (24) is intended to hold, pending, above the roller (R1) in service, a second roller (R2) which is wedged between this flap and a side wall (lc) of the casing .

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

 To put the device into service, the roller (R1) is placed on the drum (3), the cylinder (16) and the deflector (17), and the free strip is released under the device by actuating the drum using the button (7) or possibly the roller (14).

 By pulling on the protruding strip, the drum is caused to rotate while the drum slides under the fact that the latter has, at its periphery, a catchy surface of the emery cloth type (28) for example.

 During this rotation of the drum, the cutting blade (4) which is retracted inside the drum bears by its part (4b) on the cam (6) whose profile is studied so that after passing under the roller (R1 ), the blade comes out of the drum and enters the strip This material. In the maximum out position (Figure 2), and the fact that the strip is stretched on both sides by the effect of manual traction and support of the roller on the drum combined with the rotation, the strip is detached, and the released drum continues to rotate, while the blade retracts back into the drum.

 When the drum reaches the position in which the cutting blade is retracted and located behind the roll of material, the bar (6) which is held by the stop (11) and the inclined spring (12) in the position where the profiled end (8b) protrudes from the drum, bears by said end against the stop (9), as seen in Figures 5, 6, and 7, thereby stopping the drum.

 By reaction, due to the return spring (12), the bar moves (arrow a) in the passage opening (3h) and, under the effect of the spring, retracts inside the drum, while the other end (8a) of the bar in turn comes into overflow.

 The device is then ready to be used again.

 When a new strip is pulled by rotating the drum, the protruding and profiled end (8a) of the bar rests against the ramp (10) of the front wall of the casing (FIGS. 8, 9, 10), and said bar is pushed back (arrow b) to be replaced in the position where the end (8b) overflows, in order to stop the drum after cutting.

 When the roller (R1) is almost finished (i.e. when there are only a few lengths of tape left to distribute around the mandrel or core (A), the latter can rest on the pallet (18), s extending between the drum (3) and the cylinder (16).

But the weight of the mandrel is not sufficient to rotate the pallet, this is why it is planned to ballast the mandrel either by introduction of an independent bar (29), or by implementation of a mandrel itself ballasted. Note that this additional weight of the roller prevents any slipping on the drum outside of manual traction, when the roller is very largely started therefore less heavy.

 The mandrel thus ballasted rotates the pallet (18) which by its arm (18b) then pushes upwards the rod (21) against its return spring (22).

 The upper end (20b) of the rod lifts the hook (23), thereby releasing the flap (24) which, under the effect of the weight of the waiting roller (R2), pivots downwards through the opening (lg ). The roller (R2) then takes the place of the roller (R1) which has fallen into a lower receptacle (30). At the same time, the spring (22) returns the rod (20) downwards and the pallet (18) in the high position, while the spring (27) also returns the flap (24) in the locking position by the hook (23 ).

 By then carrying out a new manual traction on the protruding strip of the roller (R1), the roller (R2) will be driven by the drum (3) and then two strips will be distributed simultaneously until the roller (R1) is finished.

 As a variant, in particular if one wishes to apply the invention to distribute strips of greater width, it may be advantageous to replace the device comprising the bar (8), the stops (9) and (11), the ramp ( 10) and the spring (12) by the arrangements known from previous requests of which the depositor is also the holder, in particular request 85.02873, that is to say using a parachute, a ratchet, fixed or mobile stops , and guide means, associated with the rotation of the drum, by arranging them to correspond to the structure of the present invention.

 The advantages clearly emerge from the description, in particular the simplification of the device is compared with existing devices, the smooth and precise operation, the automatic change of rollers increasing the capacity of the device, the easy and rapid loading of the device by the absence of any roller support, the small footprint in depth.

 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; on the contrary, it embraces all its variants.

Claims (5)

-1- Simplified apparatus for the simultaneous distribution and cutting of strips of wound material, with automatic change of the roll in use, of the type in which the roll of material in use is preferably applied by pressure directly to a drum with an anti-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 distributed and cut by a serrated cutting device which is associated with the drum and protrudes 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; the apparatus is characterized in that the drive drum (3) incorporating the cutting member (4) is mounted transversely with free rotation between front and rear walls (la-lb) of the casing (1), and the roll (R1) of material in service is simply placed on the drum while also being in rolling bearing on a cylinder (16) rotatable relative to said walls; the free strip to be pulled overflowing under the apparatus after being wound on the drum and having passed between two idle rollers (14-15) and an opening (le) of the casing; a device (18) sensitive to the weight of the roll of almost empty material, pivots when said roll can pass between the drum and the rotary cylinder to be received in a magazine (30) and controls the automatic positioning of a new roll ( R2) retained until then in the upper part of the device, a profiled member (8) passes through the drum to cooperate alternately with one or the other of the front or rear walls of the casing, in order to stop the drum after cut and return the drum to the standby position. -2- Apparatus according to 1, characterized in that the profiled member (8) is a bar of length slightly greater than that of the drum (3), e has an end (8a) profiled to bear on a ramp (10 ) formed on the front wall (lb) of the casing, so as to push back: the bar during rotation of the drum, before the blade leaves for cutting, in order to place it in the overflow position at its other end ( 8b) for pressing against a stop (9) formed on the rear wall (la) of the casing, in order to stop the drum after cutting; the bar being returned automatically against a stop (11) inside the drum to be in the overflow position of its end (8b), by inclined spring (12) inside the drum. -3- Apparatus according to 1, characterized in that the device (18) sensitive to the weight of the roll of almost empty material and controlling the commissioning of the second roll, is a pallet pivotally mounted at (19) on the front and rear walls of the housing, and one of the arms (18b) of which has an oblong opening (18d) cooperating with a finger (20a) integral with a rod (20) guided vertically behind the rear wall (la) of the housing, and the end of which upper, when the pallet (18) is pivoted downwards, raises a hook (23) retaining the support device for the roller (R2) on standby. -4- Apparatus according to 1 and 3 together, characterized in that the roller support device (R2) is a flap (24) articulated at its upper part on the walls of the housing, and extending in an inclined downward direction to wedge the roller between it and a side wall (lc) of the housing; at the lower part, the flap has on the side opposite the rear wall (la) of the casing, a projection (24a) passing through an opening in an arc (lg) of the wall, and cooperating with the active part (23a) of the hook, a spring (2, 7) attached to the shutter and to the hook, recalling the shutter in the locked position after the fall of the roller (R2).  -5- Apparatus according to 1, characterized in that the mandrels or hubs (A) of the rolls of material are ballasted directly from manufacture or by attached element, to ensure in all conditions the drive without sliding of the material on the drum, and to authorize the pivoting of the pallet (18) when they are supported thereon.