EP1026113A2 - Foil dispenser - Google Patents

Abstract

Film dispenser has a support for a roll (10) of the film, guides for a film section drawn from the roll and a film cutting blade (40). The leading end (18) of the film is drawn from the roll by hand and the film movement initiates operation of the cutting blade relative to the film guide (22) to cut off a length (l) of film.

Description

The invention relates to a film dispensing device comprising a Storage for a film supply roll with film wrapping, in particular Plastic film, paper film, cellulose film or metal film winding, for kitchens, laboratories, clinics and similar needs, guidance for approximate definition of a matched to a cutting process Path of one to be separated from the film supply roll to be separated Foil leading section, and cutting means with at least one Cutting edge in association with this path.

Such film donation facilities are at the need points mentioned installed to allow the user from a roll delivered foil single pieces of different depending on the need Cut off length.

The invention is based on known constructions in which the Storage roll of the respective film supply roll a stationary blade or Saw edge is assigned so that the manipulating the leading end Hand after a pivoting movement of the leading end section around the Blade or saw cut off by a pulling impulse can.

The known embodiment works with easily tearable and little tough foils regularly in a sufficient manner. With less tearable and in particular tough films, such as plastic films the following problem arises: by extreme sharpening of the blade or Saw edge can ensure that even such tough foils sufficient precision can be cut off. On the other hand the use of extremely sharpened blades or saw edges in particular connected to the risk of injury in the household, whereby too keep in mind that even playing children too easily at film dispensing facilities can get close.

The invention has for its object a film dispenser to indicate which enables the cutting of even tough films and reduces the risk of injury.

To solve this problem, the invention proposes that by manual manipulation of the film advance section, in particular its leading end, a cut off of the respective film leading section triggering relative movement of the cutting edge a guide part can be triggered.

The manual manipulation of the film advance section leads according to the invention to an additional cutting movement of the cutting edge compared to the Foil, which supports the cutting of even tough foils. There this additional cutting movement by manipulating the film advance section is initiated, it is ensured that the manipulative Person manipulating hands while initiating the cutting process or has fingers at a distance from the moving cutting edge, i.e. outside the danger zone of an injury. On the other hand, the Effective cutting edge without extreme sharpening, because you just the additional movement, that is the relative movement compared to the Guide part, is conveyed. In addition, the additional movement brings following additional possible advantage: The cutting edge can, as long should not be cut, kept in a protective state , for example in a position in which they are shaded by a Protective edge stands and cannot be touched. It then exits this shadow of the protective edge only when cut out should be, i.e. when the manipulation is done, the cutting should initiate.

If one speaks of cutting edge here, then this expression should also include saw edges and other edge shapes that cut off enable. The geometry of the cutting edge is not fixed. The cutting edge can run in a straight line, if desired with an inclination with respect to the closest transverse film line. It it is also conceivable to use cutting elements, e.g. Circular knives or circular saws, to be used along a line parallel to the film transverse line Are guided.

If there is still talk of guidance material, it includes physical equipment Understand guidelines, but also markings on a basic framework the film dispensing device, which allow the experienced user the the course of the path, which is matched to the cutting process, by manipulation of the film advance section.

It is possible that the relative movement of the cutting edge by pulling movement the film after bringing about the cutting process coordinated route can be triggered. It is also possible that the relative movement of the cutting edge by a swiveling movement of the film advance section by a parallel to a film transverse line Support line of the guide means can be triggered.

It is also possible that the relative movement of the cutting edge can be triggered by a tensile force pulse in the pull-off direction on the film.

With regard to easy handling of the film dispenser in particular thought that the guide means for one-sided investment of Foil are determined and trained. This means that after a Cutting off a respective film advance section the resultant next film advance section backwards of the cutting edge detected, redrawn and approximated again to the guidance means can. In other words: no threading is required.

The cutting effect can be supported by the fact that Guide means have a film deflection or kink area, which runs parallel to a film transverse line and that the cutting edge in the Foil deflection or kink area is arranged.

Furthermore, the response to the manipulation of the film lead section are still sensitized by the fact that the guidance a Have film deflection or kink area, which is parallel to one Foil transverse line runs and that a tamper-evident sensor system is arranged in the film deflection or kink area.

A sensor system that detects the manipulation can, for example, detect one Include film contact body, which by frictional engagement with in Pull-off movement of the film around a transverse film line parallel pivot axis is pivotable. In this case, one is sufficient slight tightening of each with the roll material connected film advance section to the film contact body to cause rotation and thus trigger the cutting movement.

The sensors that detect the manipulation can also be used with one of the Apply film in the path that is tailored to the cutting process Pushbutton must be formed. In this case the push button responds if the one caught by manipulating fingers at their leading end Section of the film advance section that has already moved over the cutting edge is approached swinging to the key. The key is then depressed and releases the cutting movement of the cutting edge out.

Furthermore, it is also possible that a manipulation-detecting Sensor system a force measuring device assigned to the storage of the film supply roll includes. In this case, proceed as follows: You pull it each to be separated film lead section with its lead end so well above the position of the cutting edge before that the desired length down the cutting edge is available. This peeling can with the slowness to observe and pretend the desired length of the film section to be cut is necessary anyway. Is this piece of film then over the cutting edge preferred, so you can with a short pull on the Acting ahead. This traction impulse is transferred to the Bearing of the film roll. At this warehouse of the film roll one can Install force sensors that register the occurrence of the tensile force pulse and causes the cutting edge to move relative to it the coordinated route.

It is usually advantageous if the film supply roll has an unwinding braking device assigned, although not be excluded is to do that solely by the moment of inertia of the film supply roll a braking effect arises in connection with the respective Manipulation triggers the relative movement causing cutting allowed. If this moment of inertia is not sufficient, then will provide an unwinding brake device which it manipulating hands allowed a tension in the respective film advance section initiate and thereby or in connection with it trigger the cutting process.

According to a simplest embodiment, it is possible that the cutting edge is arranged substantially parallel to a transverse film line and that the relative movement of the cutting edge relative to the guide part has a movement component orthogonal to the film surface. It should but also can not be excluded that the cutting edge along a film transverse line is displaceable, such as from DE 92 07 836 U known.

The guide means can include a storage surface, on which after Cut off a slide advance section the newly created slide advance section is discardable. This will record each made easy on the roll hanging film advance section; this recording can be further facilitated in that the Storage area has at least one depression, which the underside the one still connected to the film supply roll Film advance section for subsequent peeling and manipulation facilitated.

In order to manipulate the tension of the film on the path length between To concentrate the film supply roll and the deduction-side end of the guide means, it is recommended that the lead agent has a lead agent drainage role comprise which about an axis of rotation parallel to a film transverse line is rotatable.

For the construction of the facility, it proves to be advantageous if a sensor system that responds to hand manipulation and / or the cutting means are attached to the guide means. The Attachment of the sensors or the cutting means to the guide means can be designed in such a way that the guide means one of the film width define the appropriate route and that on the guidance means on both sides fastening means for the sensor system and / or for outside the guideway the cutting means and / or for a provided at the end of the runway Guide roller are provided.

The guide means can be designed as a baffle to be on this Way to create a lightweight construction for a film dispenser is acceptable in terms of construction and costs.

The active connection between the cutting means and the sensor system is made as simple as possible for manufacturing reasons, for example in the way that the cutting means as part of a manipulation-responsive Sensor system designed or with such a sensor system by mechanical Transmission means are connected. But it is not meant to be excluded be that an electrical control connection between sensors and Cutting means is used especially when a source of external energy for moving the cutting edge relative to the guide means is provided.

A source of external energy can also be used in complex film dispensing facilities dispense with the rotary motion of the roll used when pulling the respective film advance section to to charge an energy store, for example to tension a spring device, which later relaxes when manipulation sensors are operated and thereby causing the relative movement of cutting means and guide means.

The basic structure of the film dispensing facility is on the possibility noted that the film supply roll includes a bearing shaft, which at their ends in a storage pocket of one if desired with several Foil supply rolls stocked roll carrier is stored.

To save on table space in the kitchen or in the laboratory, there is Possibility that the film supply roll attached to a roll carrier which is for hanging on a suspension rail or a Perforated sheet with hook structures and, if necessary, with spacer structures is provided.

Fig. 1

eine Prinzipskizze einer ersten Ausführungsform;

Fig. 2

eine Prinzipskizze einer zweiten Ausführungsform;

Fig. 3

eine Prinzipskizze einer dritten Ausführungsform;

Fig. 4

eine Prinzipskizze einer vierten Ausführungsform;

Fig. 5

eine konkretisierte Ausführungsform entsprechend derjenigen nach Fig. 1 im Schnitt;

Fig. 6

eine Endansicht zu Fig. 5 in Pfeilrichtung VI der Fig. 5;

Fig. 7

einen Schnitt nach Linie VII-VII der Fig. 6;

Fig. 8

eine Rollenlager-Leitblechanordnung in Vergrößerung.

The accompanying figures explain the invention using exemplary embodiments. They represent:

Fig. 1

a schematic diagram of a first embodiment;

Fig. 2

a schematic diagram of a second embodiment;

Fig. 3

a schematic diagram of a third embodiment;

Fig. 4

a schematic diagram of a fourth embodiment;

Fig. 5

a concrete embodiment corresponding to that of Figure 1 in section.

Fig. 6

an end view of Figure 5 in the direction of arrow VI of Fig. 5.

Fig. 7

a section along line VII-VII of Fig. 6;

Fig. 8

a roller bearing guide plate arrangement in enlargement.

In Fig. 1, a film supply roll 10 is rotatably mounted on a shaft 14. The shaft 14 is by bearing pockets not shown on their Ends added. The film is drawn with a dashed line Line 16 shown. The film is at its leading end at 18 between two finger pairs of both hands are grasped and removed up to one Length l of a film lead section, which is for a wrapping or Cleaning process is needed. Then the film advance section l, brought into position 20 without the fingers having to reach around. The Film advance section 1 comes to rest on an eccentric roller 26; the film advance section 1 then becomes a small piece in the direction of the arrow 28 pulled, the eccentric roller 26 rotates in the direction of arrow 30 from the rest position determined by the stop 32 against the Effect of a tension spring 34 up to the stop of the spur 36 on one Stop 38. One occurs at the eccentric roller 26 for common Rotation fixed blade 40 in cutting engagement with the film and the Film advance section 1 is cut off. The gear ratios can be chosen so that the blade 40 with its cutting edge 42 hits the film at high speed and reliably cuts through.

One can easily imagine that the guide surfaces 22 and 24 too can enclose an angle with one another, the apex in the Area of the eccentric roller 26 is. The contact pressure of the film on the Eccentric roller 26 can thereby be enlarged. The friction on the Baffles 22 and 24 are made by appropriate surface treatment or minimized by installing a smooth-running roller 44. The Bearing friction of the supply roll 10 can be increased by a brake 46 become. In this way, the tension of the film advance section can be l optimize.

In Fig. 2 are analog parts with the same reference numerals as in Fig. 1st provided, each increased by the number 100. If the respective film advance section l is reached by pulling off the film the web 120 brought into the dashed line 148. Thereby a pushbutton 150 is pressed down and a knife bar 140 pivots with the result that the cutting edge 142 again in cutting engagement occurs with the slide.

In Fig. 3, analog parts are provided with the same reference numerals as in Fig. 1, each increased by the number 200. In this embodiment the leading end 218 is gripped with the fingers as before, while it is carried by the baffle 222. Then up to length l of Subtracted film advance section. During this deduction, a Rack 252 by engagement with one seated on shaft 214 Drive gear 253 shifted in the direction of arrow 254. Through a Cord 256 becomes a blade 240 opposite to the direction of the arrow 258 pulled down against the action of a helical compression spring 260. A pawl 262 snaps past a stop 264, see above that the blade 240 is held in a lower standby position.

In preparation for cutting off the film advance section 1, a Tension impulse exerted at the leading end 218 in the direction of arrow 228. This pulling pulse leads to a bearing supporting the shaft 214 Swivel lever 266 against a button 268 of a reversing mechanism 270 pushes and a lever 274 is deflected via a rod 272, which the Stop 264 carries. This releases the pawl 262, and the Blade 240 flips up to cut the film.

4 are analog parts with the same reference numerals provided as in Fig. 1, each increased by the number 300. In this embodiment, if the length l of the film leading section is reached by pulling off the film supply roll 310, the Pulled the film down into the path 348 shown in dashed lines. Here the baffles 322 and 324 are attached to a cap 376 are down against the action of the helical compression spring 378 pressed so that the film is in cutting engagement with the cutting edge 342 the blade 340 fixed here arrives. So there is one here too Relative movement between the cutting edge 342 and the guide surfaces 322, 324, which favors cutting off.

In all embodiments according to FIGS. 1-3, the cutting pawl inclined against the trajectory of the film; through this inclination the cutting effect also favors.

5 is a storage 13 for a hanging rack 11 Shaft 14 attached. The hanging frame 11 is by means of a hook structure 15 hooked onto a carrier rail. The bearing 13 includes 8, a storage pocket 17 into which the two Ends of the shaft 14 can be locked. The storage pocket 17 is attached to a piece of sheet metal 19 which forms a guide surface 22. As can be seen from Fig. 5 - upper half -, the film over the guide surface 22 initially essentially horizontally along line 16 deducted until a film advance section of the desired length l is formed. Then the film advance section 1 is into the web 20 (Fig. 5, lower half) tilted so that it has a freely rotatable guide roller 21 runs. The film comes into contact with the eccentric roller 26 so that it is rotated about its axis of rotation 23. 5 are two film dispensers shown one above the other, the upper one in the state of the film being pulled off horizontally along the path 16, while the lower one is in the state of initiating the cutting operation located. If the eccentric roller 26 by the frictional engagement with the Slide from the position of the upper illustration to the position of the lower one Reaches the illustration, the blade 40 reaches with its cutting edge 42 in the cutting position, as shown in the lower half of FIG. 5. The film is cut off and the film advance section 1 can be removed. The newly created film advance section is located then on the guide surface 22 and can be picked up again by fingers and be moved on. To make it easier to pick up with your fingers, are in the guide surface 22, as can be seen from FIG. 5 and from FIG. 6, Troughs 25 embossed, which are on both sides under the edges of the on the Guide surface 22 are overlying film. In Fig. 6 it can be seen that the Bearings 13 are attached to the sheet 22a, for example by Friction fit. It can also be seen that on the sheet 22a on its two Edges arranged orthogonally to the plane of the drawing in FIG. 6 are bearing blocks 27 for the eccentric roller 26 and for the freely rotatable guide roller 21 may be attached, e.g. in the clamp seat.

7 shows the shafts 14 which are in the bearing pockets 17 stored and at the same time corresponding to the bearing structure 17 according to FIG. 8 are locked against rotation. Bearing bodies 29 are seated on the shafts 14 for the storage of hollow cores 31 of the film supply rolls. To the Braking film withdrawal from the film supply rolls are the hollow ones Cores 31 of the supply rolls on centering springs 33 of the bearing bodies 29 put on. Through these centering springs 33 an adaptation to hollow cores 31 different diameters. Also be the hollow cores 31 are braked in their rotational movement when the film is pulled off, so that in the film on the way from the respective film supply roll up to the leading end 18 a voltage arises that Triggering the cutting process and the cutting process itself favors.

The centering springs 33 can also act so tightly that the desired Braking effect between the bearing tables 17 and the ends the waves 13 is generated. Then of course the bearing body 29 rotating test sitting on the shafts 14. It is also conceivable that the braking effect by mounting the bearing bodies 29 on the shafts 14 is produced.

The cutting edge 42 of the blade 40 can be straight or with a serrated tooth be provided. It is also conceivable that the cutting edge 42 across the width of the film web an acute angle with the latter includes, so that the cutting process begins at an edge of the film.

3, it is easily possible through the rack and pinion drive and pull the blade 240 orthogonal to the plane of the drawing in to clamp an end position in which one with a cutting edge Edge of the film web faces. By impulsive tightening the leading edge 218 can also latch in this embodiment 262 can be solved, so that the cutting edge then along an orthogonal cuts through the film web to the plane of the drawing plane.

The inclination of the blades 40, 140, ... supports the cutting process at least if, in the course of manipulating the film web A trigger movement to trigger the cutting process takes place, even if this deduction movement is only slight.

It can be seen in all embodiments that the cutting edge 42 before Initiation of the cutting process practically inaccessible to finger touch is in the shadow of one or more guiding surfaces, e.g. Guide surface 22 in FIG. 5. This eliminates the risk of injury, because the cutting edge 42 only emerges when the Leading end section l for the purpose of triggering the cutting process is manipulated. Then there are the fingers, as in FIG. 1 visible, far outside the cutting edge.

To trigger the cutting process through improper operation Avoiding the sensors can take further protective measures to be hit. So you could think of the eccentric in Fig. 1 26 into two longitudinal sections and ensure that the blade 40 only emerges when both longitudinal sections of the Eccentric roller 26 are rotated. The same applies to the Embodiment according to FIG. 2: There could be two buttons 150 on the opposite edge areas of the film may be provided, both must be depressed to effect the cutting movement of the blade 140 trigger.

Claims (24)

A film dispensing device comprising a storage (13) for a film supply roll (10) with film winding, in particular plastic film, paper film, cellulose film or metal film winding, for kitchens, laboratories, clinics and similar needs, guide means (22) for the approximate determination of a cutting process coordinated path (16, 20) of a film feed section (1) to be separated from the film supply roll (10), and cutting means (40) with at least one cutting edge (42) in association with this path (16, 20),
characterized,
that a relative movement of the cutting edge (42) relative to a guide means part (22) can be triggered by manual manipulation of the film advance section (1), in particular its lead end (18), which triggers a cutting off of the respective film advance section (1). Foil dispenser according to claim 1,
characterized,
that the relative movement of the cutting edge (42) can be triggered by pulling off the film after bringing about the path (20) matched to the cutting process. Foil dispenser according to claim 1 or 2,
characterized,
that the relative movement of the cutting edge (142) can be triggered by a pivoting movement of the film advance section (l) about a support line of the guide means (122, 124) parallel to a film transverse line. Foil dispenser according to claim 1,
characterized,
that the relative movement of the cutting edge (242) can be triggered by a tensile force pulse in the pulling direction (228) on the film. Foil dispenser according to one of claims 1-4,
characterized,
that the guide means (22, 24) are designed and designed for one-sided contact of the film. Foil dispenser according to claim 5,
characterized,
that the guide means (22) have a film deflection or kink area which runs parallel to a film transverse line. Foil dispenser according to claim 6,
characterized,
that the cutting edge (42) is arranged in the film deflection or kink area. Foil dispenser according to claim 6 or 7,
characterized,
that a sensor system (26) detecting the manipulation is arranged in the film deflection or kink region. Foil dispenser according to one of claims 1-8,
characterized,
that a sensor system (26) which detects the manipulation comprises a film contact body which can be pivoted about a pivot axis (23) parallel to a film transverse line by frictional engagement with a film which is in the withdrawal movement. Foil dispenser according to one of claims 1-9,
characterized,
that a sensor system detecting the manipulation comprises a push button (150) lying against the film. Foil dispenser according to one of claims 1-10,
characterized,
that a sensor system detecting the manipulation comprises a force measuring device (266, 268) assigned to the bearing (213) of the film supply roll (210). Foil dispenser according to one of claims 1-11,
characterized,
that an unwinding brake device (46) is assigned to the film supply roll (10). Foil dispenser according to one of claims 1-12,
characterized,
that the cutting edge (42) is arranged essentially parallel to a film transverse line and that the relative movement of the cutting edge (42) relative to the guide part (22, 24) has a movement component orthogonal to the film surface. Foil dispenser according to one of claims 1-12,
characterized,
that the cutting edge can be moved along a transverse film line. Foil dispenser according to one of claims 1-14,
characterized,
that the guide means comprise a storage surface (22) on which, after cutting off a film advance section (1), the newly formed film advance section can be deposited. Foil dispenser according to claim 15,
characterized,
that the storage surface (22) has at least one trough 25, which makes it easier to reach under the film advance section, which is still connected to the film supply roll (10), for subsequent removal and manipulation. Foil dispenser according to one of claims 1-16,
characterized,
that the guide means comprise a guide means roller (21) which can be rotated about an axis of rotation parallel to a transverse film line. Foil dispenser according to one of claims 1-17,
characterized,
that a sensor system responsive to manual manipulation and / or the cutting means are attached to the guide means (22). Foil dispenser according to claim 18,
characterized,
that the guiding means (22) define a guideway corresponding to the film width and that fastening means for the sensors (26) and / or for the cutting means (40) and / or for one provided at the end of the guideway on both sides of the guiding means (22) Guide roller (21) are provided. Foil dispenser according to one of claims 1-19,
characterized,
that the guide means (22) comprise a guide plate (19). Foil dispenser according to one of claims 1 - 20,
characterized,
that the cutting means (40) are designed as part of a sensor system (26) which responds to manipulation or are connected to such a sensor system (26) by mechanical transmission means. Foil dispenser according to one of claims 1 - 21,
characterized,
that the film supply roll (10) is assigned a bearing shaft (14) which is mounted at its ends in a storage pocket (17) of a roll holder (11) equipped with a plurality of film supply rolls (10) if required. Foil dispenser according to one of claims 1 - 22,
characterized,
that the film supply roll (10) is attached to a roll carrier (11) which is provided with hook structures (15) and, if necessary, with spacer structures for suspension on a hanging rail or perforated plate. Foil dispenser according to one of claims 1 - 23,
characterized,
that the cutting edge (42) assumes a protective condition which makes it difficult to touch or hinder in the idle state, ie before any manual manipulation of the film advance section (1 <) which triggers the cutting process.

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