EP0157713A2 - Distribution and simultaneous cutting device for enrolled band material - Google Patents

Abstract

The object of the invention relates to the technical branch of dispensing means for lengths of materials rolled up on reels. The device is remarkable because the pinked cutting hinged device (4) elastically returned into the drum (3) is connected through a roller (18) or a similar free-running component to a part (16) assuming the shape of a cam (16b), the double profile (16c-16e) of which is designed so as to allow, in addition to the projection of the blade (4a) outside the drum for the purpose of cutting the material pulled manually, spinning the drum after the cut without any slamming of the blade holder, and in order to facilitate the braking, stopping and repositioning functions of the drum for a new cut, in cooperation with shock-protecting or buffing devices (19), stops (22-23-24), and ratchet (21) suitably associated, arranged on the drum and shock protector. The invention relates to dispensers of paper, cotton wool and similar wiping materials.

Description

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 apparatus for dispensing paper, wadding and similar wiping materials.

The apparatus according to the invention is 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 non-slip surface, so that by simple manual pulling on the strip of material overflowing from the device, a strip is distributed and cut automatically, the length of which is substantially equal to the diameter of the drum, by a serrated cutting device associated with the drum and protruding from the drum when it is rotated 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.

According to the invention, we wanted to further improve the operation 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.

According to a first characteristic, the serrated and articulated cutting device in elastic return in the drum is connected by roller or similar member free in rotation, to a fixed cam whose double profile is studied to allow in addition to the projection of the blade to the outside of the drum for cutting the material pulled manually, launching the drum after cutting without slamming the blade holder, and to facilitate the braking, stopping and repositioning functions of the drum for a new cut, this in relationship with parachute or shock-absorber-stops-ratchet devices suitably associated and arranged on the drum and on the parachute.

Another characteristic is the fact that the drum is directly linked with an organ which functions at the times of axis of rotation of the drum and means of maneuver in rotation of the drum accessible either outside the wall fixing plate or outside the cover of the appliance.

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'appareil selon l'invention.
• .La figure 3 est une vue partielle en coupe à plus grande échelle illustrant les différents organes faisant l'objet de 1' invention.
• Les figures 4, 5 et 6 sont des vues en coupe considérées respectivement suivant les lignes 4-4, 5-5 et 6-6 de la figure 3, montrant les organes conformes à l'invention.
• La figure 7 est une vue partielle illustrant l'organe de manoeuvre manuelle du tambour selon une forme de réalisation.

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 apparatus according to the invention.
• . Figure 3 is a partial sectional view on a larger scale illustrating the various bodies subject of one invention.
• Figures 4, 5 and 6 are sectional views considered respectively along lines 4-4, 5-5 and 6-6 of Figure 3, showing the members according to the invention.
• Figure 7 is a partial view illustrating the manual operating member of the drum according to one embodiment.

In order to make the object of the invention more concrete, it is now described in a nonlimiting embodiment 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 a Patent Application No. 83.19815 of which the applicant is also the holder, it being understood that the invention can be apply to other types of devices to 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 suitably connected to means forming the object of the invention to allow the periodic exit of a serrated cutting blade (4a) outside the drum, when the strip is pulled of material overflowing under the device thereby rotating the rough surface drum on which is applied the roll (Rl) of material carried by a support bracket (6) articulated in (7) on the base plate.

It can also be seen that the apparatus has a deflecting plate extending in front of the drum and carrying fixedly or detachably inclined support arms (8) made of material with elastic capacity for receiving, by spacing and on slides (8a), pins (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 orifices (8b) formed at the bottom of the slides, and a new roll can be put in place on its support bracket (6). In this way, two strips of material can be distributed simultaneously until the first roll is finished.

Another roller has been illustrated (10) mounted for free rotation between the flanges of the base plate (1) and extending parallel to the drum, immediately above the opening for passage of the material under the device. In its central part, the roller (10) is connected in rotation to the drum by a belt (11) or similar member, in order to guide the material towards the opening while preventing it from passing between said drum and said roller, thus only to prevent fingers from entering the machine near the cutting blade.

The drum is mounted for free rotation on support means (2) integral with flanges (la - lb) of the base plate. On one side, the wall of the drum is integral with an axis (12) extended by an eccentric (12a) connected by spring (13) to the flange (la). In contrast, the drum is connected to the support (2) by an axis (14) locked by screws (15) and passing through the flange (lb) with at the projecting end a flywheel (14a) or other similar means of operation. . Between the support (2) and the drum is interposed a part (16) having a bearing face against the support (2) where it is fixed by at least one screw (17). In contrast, the part (16) has the shape of a cam (16b), the profile of which emerges clearly from FIGS. 4, 5 and 6, that is to say with a curved upper part (16c) defined to ensure the output of the cutting blade (4a) out of the drum by means of a follower roller (18) mounted at the end of said blade and passing through the wall of the drum through an appropriate opening (3b). After the rounding (16d) at the most eccentric end, the cam has a lower profile (16e) also in curve but less pronounced to operate on the one hand the withdrawal of the blade and, on the other hand, the launch of the drum after cutting without clicking or brutality in relation to the spring (13) for returning the eccentric (12a) which is suitably oriented to ensure its role of storage of force just after cutting.

Between the cam (16b) and the bearing face, the part (16) has a stepped centering surface (16a) for the free rotation mounting of a parachute (19) which is thus only retained between the part (16 ) and the support (2). On this parachute is pivotally mounted by one end at (20), a pawl (21) which is supported by gravity on a stop (22) integral with the parachute.

On the other hand, the wall of the drum projecting near its periphery a finger (23) integral with said wall and, closer to the center an overhanging stop (24) articulated at (25) inside the drum than it crosses through an opening in an arc (3c).

A description will now be given of the operation of the apparatus at the level of the abovementioned members, with reference to the various figures of the drawings, in particular to Figures 4, 5 and 6.

At rest, when a strip of material overflows under the device ready to be pulled, the finger (23) is supported on the end of the pawl (21) itself applied by gravity to the stop (22)) of the parachute (Figure 5), and the movable stop (24) is also in the low position in the opening (3c) by its own weight.

When pulling on the overflowing strip of material, the drum (3) is rotated due to its rough surface, and the follower roller (18) runs through the upper profile (16c) of the cam to bring out the blade when the opening (3a) of the drum has exceeded the roll of material (RI). The serrated cutting blade then penetrates the material stretched on both sides while continuing to rotate with the drum until it tears completely

The drum then released from the traction on the material, continues its rotation by the action of the spring (13) stretched by one eccentric, and the return spring of the blade holder forces the roller (18) running through the lower profile (16e) of the cam, thereby ensuring the withdrawal of the blade. In this action, the finger (23) passes between the stop (22) and the pawl (21) by lifting it, while the mobile stop (24), by the effect of the centrifugal force passes in high position in the opening (3c) and then presses against the stop (22) of the parachute in order to stop the rotation of the drum after a limited tilting of the parachute relative to a spring (26) which connects it to the flange (lb) of the plate basic (Figure 2).

By reaction, the movable stop (24) returns to the low position and the finger (23) rests again against the pawl (21) falling freely on the stop (22) of the parachute, which is then also stopped in its oscillation in front due to the force of the finger (23), by a stop (27) secured to the parachute and pressing against a stop (28) secured to the flange (lb), as seen in Figure 2. The device is then ready to use again due to the fact that in the complementary rotation of the drum after cutting, a new strip of material overflowed under the apparatus.

• - La simplification des organes participant au fonctionnement de l'appareil par rapport aux mécanismes mis en oeuvre dans les précédentes Demandes du déposant, assurant ainsi une bonne fiabilité et une économie de fabrication.
• - Le profil double de la came de commande du porte-lame permettant la sortie progressive de la lame en dehors du tambour avec le minimum d'effort, et son retrait également en douceur, facilitant l'encliquetage, c'est-à-dire le positionnement correct du tambour en vue d'une nouvelle distribution.
• - Le fonctionnement efficace de différents mécanismes de commande, empêchant le déroulement de plusieurs longueurs de matériaux à la fois, et la formation de boucles de matériau entre le rouleau et le tambour pendant l'actionnement ; les déchirements éventuels peuvent être éliminés par actionnement manuel du tambour par le moyen de manoeuvre extérieur.
• - Le montage aisé des organes, sans aucun règlage particulier. L'invention ne se limite aucunement à celui de ses modes d'application non plus qu'à ceux des modes de réalisation de ses diverses parties ayant plus spécialement été indiquées ; elle en embrasse au contraire toutes les variantes.

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

• - The simplification of the organs involved in the operation of the device compared to the mechanisms used in the previous Applicant's requests, thus ensuring good reliability and economy of manufacture.
• - The double profile of the blade holder control cam allowing the progressive output of the blade outside the drum with the minimum of effort, and its removal also smoothly, facilitating the latching, that is to say the correct positioning of the drum for a new distribution.
• - The efficient operation of different control mechanisms, preventing the unwinding of several lengths of material at the same time, and the formation of loops of material between the roller and the drum during actuation; any tears can be eliminated by manual actuation of the drum by the external operating means.
• - Easy assembly of the components, without any particular adjustment. 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 having more particularly been indicated; on the contrary, it embraces all its variants.

Claims (1)

-1- Apparatus for 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 on a support, is applied by pressure directly on a drum with 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 apparatus is characterized in that the serrated cutting device (4) which is articulated in elastic return in the drum (3) is connected by roller (18) or similar member free in rotation, to a part (16) forming a cam (16b), the double profile (16c - 16e) of which is designed to allow, in addition to the projection of the blade (4a) outside the drum with a view to cutting the material pulled manually, the launching of the drum after cutting without slamming of the blade holder, and to facilitate the braking functions of stopping and repositioning the drum for a new cut, this in connection with parachute or damper devices (19), stops (22 - 23 - 24), and ratchet (21) suitably associated and arranged on the drum and on the parachute. -2- Apparatus according to claim 1, the drum (3) is mounted for free rotation on support means (2) integral with the flanges (la - lb) of a wall-mounted base plate, with on one side an eccentric axis (12 - 12a) connected to a spring (13) for launching the drum after cutting, characterized in that on the opposite side the drum is secured to an axis (14) successively passing through the part (16) forming cam, the support means (2), and the flange (lb); said axis having direct ment at its laterally projecting end an operating means (14a) of the flywheel type for example, to allow the manual drive of the drum in case of tearing of the material in the device; said operating means being able to be located either between the flange (lb) and the closing cover, or outside said cover. -3- Apparatus according to claims 1 and 2 together, characterized in that the part (16) forming a cam has a bearing face against the support means (2) where it is fixed by at least one screw (17), then a centering surface (16a) shouldered for mounting with free rotation, but limited transversely of the parachute (19) which is angularly retained by a spring (26) integral with the flange (lb). -4- Apparatus according to claim 1, characterized in that the parachute (19) carries at its upper part a pawl (21) articulated by one end at (20) on the parachute, and which 'rests by gravity at its other end on a stop (22) integral with the parachute, in order to retain in rotation in one direction the drum (3) having for this purpose on its wall a finger (23) projecting from abutting against the pawl. -5- Apparatus according to claim 1, characterized in that the wall of the drum (3) facing the parachute, has a stop (24) articulated inside the drum and passing through said wall by an orifice in an arc (3c); the articulation (25) of the stop being arranged so that it is naturally in the low position in its opening at rest, and that by the action of the centrifugal force generated during rotation of the drum, said stop is in position high in its opening so that the projecting part bears against the stop (22) of the parachute when the drum must be stopped after cutting.

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