JP3777056B2 - Automatic feeding device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an automatic feeding device that feeds a film to a device that transports the film while fixing both sides of the film with clips, such as a transverse stretching device.
[0002]
[Prior art]
In general, a lateral stretching apparatus that grips a web-like film with a clip and stretches it in the width direction is composed of an oven and a number of clips that run in the oven. The film that is continuously fed is caught by the clips on both sides before the entrance to the oven, and is stretched in the width direction in the oven as the clip travels, and then released at the exit. Sent to the process.
[0003]
Conventionally, as a technique for feeding a film to such a transverse stretching apparatus and holding it with a clip, as disclosed in Japanese Patent Publication No. 57-57260, Japanese Patent Laid-Open No. 63-15727, etc., a plurality of conveyor belts are used. There is a mechanism for feeding a film to a clip of a transverse stretching apparatus manually or semi-automatically using a mechanism combining the above.
[0004]
[Problems to be solved by the invention]
In the above-described technology for feeding a film to the conventional transverse stretching apparatus, it is difficult to cause a conveyance failure due to curling of the film or to bite a clip on both sides of the film when the film is wide. In addition, since the conveyors are positioned above and below the film, the film may be contaminated by the fall of dust or the like. Further, since the apparatus is complicated, the production is troublesome, and changing the film width is troublesome because the position of the guide plate and the belt needs to be changed, and it is a very dangerous operation.
[0005]
The present invention solves the above-mentioned problems, and can automatically feed the film into the clip with a simple device, so that dust does not fall on the film, and the film width can be easily changed. An object is to provide an apparatus.
[0006]
[Means for Solving the Problems]
The present invention has been made to achieve the above object, and the automatic feeding device of the present invention is provided on the upstream side of a device that conveys while holding both sides of a film with a plurality of clips. Film cutting means provided movably in the width direction, a guide shooter for guiding the narrow film portion formed by the cutting means to one clip, and a film conveying means for conveying the film in the guide shooter The guide shooter includes a shooter body that can advance and retreat in the width direction and a side plate that opens and closes an opening on a side of the shooter body .
[0007]
In the film automatic feeding method of the present invention, a narrow film portion having one side end at the leading end of the film and narrower than the entire width of the film is formed, and the narrow film portion is formed by a plurality of clips on both sides of the film. It is configured to feed into one clip of the apparatus to be conveyed while gripping, grip the outer side edge with the clip, and then grip the side edge of the film opposite to the narrow film portion with the other clip. .
[0008]
In the present invention, when the film is fed to an apparatus that conveys the film while gripping both sides of the film with a plurality of clips, a narrow film portion is first formed at the leading end of the film, and the outer end of the narrow film portion is gripped by the clip, Then, the other outer end of the full width film following the narrow film portion is held by the clip, so that the film can be held by the clip very easily with a simple device.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Any film cutting means may be used as long as it can cut the film. Examples of the film cutting means include laser cutting, ultra-high pressure water, a saw blade, and heat rays.
[0010]
The guide shooter guides a narrow film and may be any one that can regulate the movement of the film in the vertical and horizontal directions.
[0011]
The film conveying means is for conveying the film in the guide shooter, and various conveying means such as a roll, a belt, and a combination thereof can be adopted.
[0012]
Examples of the apparatus for conveying while holding the both sides of the film with a plurality of clips include a transverse stretching apparatus and a drying apparatus.
[0013]
The film applicable to the automatic feeding apparatus of the present invention is a film made of a thermoplastic resin, preferably having a thickness of 400 μm or more, particularly preferably having a thickness of 600 μm or more.
[0014]
An embodiment of the automatic feeding device of the present invention will be described with reference to the drawings.
[0015]
1 is a perspective view showing the overall configuration of the automatic feeding apparatus, FIG. 2 is an enlarged side view of a laser head portion, FIG. 3 is a sectional view of a guide shooter, FIG. 4 is a sectional view seen from the side of the guide shooter, and FIG. FIG. 6 is a schematic view showing the operation of the laser, and FIG. 7 is a plan view of the film showing the cutting state of the film.
[0016]
In FIG. 1, reference numeral 1 denotes an automatic feeding device, and reference numeral 2 denotes a transverse stretching device into which the film 3 is fed by the automatic feeding device 1.
[0017]
The automatic feeding device 1 is provided with a driving nip roll 4 and a driven pass roll 5 on the upstream side (the side on which the film 3 is conveyed, and so on), and on the downstream side (the side on which the film 3 is conveyed, and so on). Similarly, a driving nip roll 6 and a driven pass roll 7 are provided at a small distance from each other, and two upper laser guides 8 and 8 and a lower laser guide 9 are interposed between them as shown in FIG. The laser head 10 is provided between the upper laser guides 8 and 8 so as to be movable in the width direction (the direction perpendicular to the film transport direction, the same applies hereinafter). Further, a smoke discharge groove 9a is formed at a position of the lower laser guide 9 facing the laser head 10, and a suction hose 11 for sucking smoke from the groove 9a is further provided.
[0018]
In the vicinity of the driven pass roll 7, a sorting roll 12 that directs the film 3 toward the collection side and a sorting push roll 13 that removes sorting defects due to burrs of the film 3 cut by a laser, etc., can rotate substantially vertically. A guide plate 14 that substantially reaches the driven path roll 7 is attached to the sorting roll 12. A tenter sorting roll 15 for turning the film 3 toward the lateral stretching device 2 is provided at an angle below the sorting roll 12 so as to be rotatable in a substantially vertical direction, and a take-off drive is provided below the tenter sorting roll 15. A roll 16 and a follow-up driven nip roll 17 are provided. The take-up driven roll 17 is provided so as to be crimped to the take-up drive roll 16 by an air cylinder (not shown), and is formed of rubber, and a groove is formed on the surface thereof.
[0019]
Further, an upstream end of the guide shooter 18 is positioned in the vicinity of the sorting roll 12 and the sorting push roll 13, and the guide shooter 18 is folded in an inverted Z shape on the way, and then the downstream end thereof is a lateral stretching device. 2 adjacent to the carry-in side end.
[0020]
The guide shooter 18 is widely formed in a trumpet shape at the upstream end where the narrow film 3a enters, that is, the upstream end is formed with a width of 300 mm, and the downstream side with a width of about 230 mm. Is formed. As shown in FIG. 3, the guide shooter 18 includes a shooter main body 18a and a side plate 18b that is rotatably provided on the shooter main body 18a and opens and closes a side opening. It is driven by an air cylinder 18c. The shooter body 18a is connected to the positioning air-hydro cylinder 18d so as to advance and retract in the width direction.
[0021]
Further, as shown in FIG. 5, the guide shooter 18 is divided into a plurality of parts, and each of the members constituting the guide shooter 18 is a wrapper whose upstream end is wide so that the narrow film 3a is not caught. It is formed in a shape. The height of the guide shooter 18 is about 50 mm (possible in the range of 20 to 80 mm).
[0022]
As shown in FIG. 4, the guide shooter 18 is formed in a substantially hermetically sealed state, but the MC is arranged so that the narrow film 3a does not enter the place where the various rolls 19, 21, 20, 23, 25 are provided. An entrainment prevention portion 18e made of a soft material such as nylon is provided. The inner surface of the shooter body 18a is provided with substantially hemispherical sliding portions 18f at a predetermined interval in order to reduce frictional resistance. Instead of providing the hemispherical sliding portion 18f, a Teflon sheet may be attached or a nitax process may be performed.
[0023]
In the portion of the guide shooter 18 that is folded back in an inverted Z shape, the roll with clutch 19, the roll with clutch 20, the roll with clutch 21, and a guide that can be attached to and detached from the roll 21 from the upstream side to the downstream side. A belt 22, a clutch-equipped roll 23, a guide belt 24 detachably attached to the roll 23, and a clutch-equipped roll 25 are sequentially provided. The guide belts 22 and 24 are preferably seamless belts that do not easily damage the rolls and that have a feeding force.
[0024]
The lateral stretching device 2 is provided with clip chains 30 and 30 on both sides, and clip closers 31 and 31 are provided near the ends of the clip chains 30 and 30. Further, EPC heads 32 and 32 that are movable forward and backward in the width direction are provided adjacent to both ends of the clip chains 30 and 30, and a suction conveyor 33 and the suction conveyor 33 are provided on the side corresponding to the guide shooter 18. A pressing roll 34 with a guide for pressing the film 3 is provided, and a guide plate 35 is provided on the opposite side.
[0025]
Next, a method for feeding a film to a transverse stretching apparatus using the automatic feeding apparatus as described above will be described.
[0026]
First, it is assumed that the film 3 is conveyed in the collection direction. At this time, the film 3 passes through the drive nip rolls 4 and 6, is bent downward by the sorting roll 12 to the collection system, and is then collected through the take-up drive roll 16 and the take-up driven nip roll 17. Further, the laser guide plates 8 and 9 are moved away from each other in the vertical direction, and the guide shooter 18 is moved to a position away from the conveyance path of the film 3 to the side. Further, the guide belts 22 and 24 are in a state of being detached from the respective clutch-equipped rolls 21 and 23.
[0027]
In order to send the film 3 to the transverse stretching apparatus 2 from the state in which the film 3 is transported to the recovery system, first, the guide shooter 18 that has been waiting at a position away from the film 3 is moved to the film 3. Move horizontally to the side corresponding to the width and stop. At this time, the guide shooter 18 is moved by an air hydro cylinder, a motor or the like (not shown), and the stop position is detected by a limit switch, a phototube or the like (not shown). When the position of the guide shooter 18 is determined, the clutches 19, 21, 20, and 23 with the clutch are simultaneously engaged, and are rotated by a motor (not shown) at a speed approximately 10 to 50% faster than the clip chain 30 and detached. The guide belts 22 and 24 that have been driven are driven and brought into a pressure-bonded state with the clutch-equipped rolls 21 and 23 that are moving and rotating.
[0028]
Further, the position of the clip chain 30 is determined in accordance with the positions of both side ends of the film 3. The tenter rail width is set manually or automatically relative to the film width. The position is determined to be 20%, preferably 10% narrower than the base width. Further, the suction conveyor 33 with guide plate is raised from below, set to the biting height of the tenter clip chain 30, and then put into operation. The speed of the suction conveyor 33 is adjusted to be about 10% faster than the speed of the clip chain 30. Further, the clip closers 31 and 31 are set, and the EPC heads 32 and 32 are in a state of being retracted sideways.
[0029]
In the state as described above, the distribution roll 12 is allowed to escape upward, the tenter distribution roll 15 is raised, and the film 3 is switched in the direction of the transverse stretching apparatus 2. Next, the upper laser guide plate 8 and the lower laser guide plate 9 are brought close to the film 3, and the lower laser guide plate 9 is brought into contact with the film 3, thereby preventing fluctuations in focus when the laser is cut due to the wave of the film 3. It can be so.
[0030]
Then, the laser head 6 is moved as shown in FIG. 6 to cut the film 3. That is, in FIG. 6, point a represents the right end (left side end in FIG. 1) toward the traveling direction of the film 3, and point c represents the left end (right end in FIG. 1) toward the traveling direction of the film 3. And b point represents an intermediate point. First, the beam is turned on from point a to b in the state of beam ON, and a cutting line d is formed as shown in FIG. 7, then the beam is turned on and stopped at point b for a predetermined time, as shown in FIG. A cutting line e is formed. Thereby, the narrow film part 3a is formed. The narrow film portion 3 a is distributed to the guide shooter 18, fed by the rolls with clutches 21, 23, etc., and conveyed through the guide shooter 18 onto the suction conveyor 33. The suction conveyor 33 is angled so as to be in the direction of biting into the clip chain 30 and is surely bitten by the clip. At this time, portions other than the narrow film 3a of the film 3 are conveyed to the collection system by the take-up drive roll 16 as usual.
[0031]
After the narrow film portion 3a is caught in the clip chain 30, the laser head 10 is moved from the point b to the point c in the beam ON state to form a cutting line f as shown in FIG. Full width. At this time, the side plate 18b of the guide shooter 18 is open.
[0032]
When the film 3 is transported and the other side end is caught in the clip chain 30, the suction conveyor 33 is lowered and the EPC head 32 is set to automatic. Further, the laser guide plates 8 and 9 are detached, the laser head 10 is returned to the original point a, and the sorting roll 15 is also lowered.
[0033]
Next, the case where the automatic feeding apparatus 1 is stopped, for example, when the transverse stretching apparatus 2 is stopped will be described.
[0034]
If the transverse stretching apparatus 2 is stopped, the film 3 is in a state of being continuously conveyed by the automatic feeding apparatus 1, so that the film 3 comes loose between the tenden roll 25 and the transverse stretching machine (note that the roll A dancer roll for absorbing slack may be provided upstream of 5, but the dancer roll may not be provided if the nip rolls 4 and 6 enter quickly and prevent the film 3 from meandering. In such a state, first, the sorting roll 12 is lowered to change the flow of the film 3 to the recovery system, and at the same time, a slitter and a pulverizer (not shown) of the recovery system are operated.
[0035]
Next, the laser guide plates 8 and 9 are brought close to the film 3, the beam is turned on, and the laser head 10 is moved about 40 m / sec. Run on. Then, since the film 3 on the downstream side is tensioned by the roll 7 and the roll 19, the film 3 on the downstream side is sent to the transverse stretching machine 2. Are continuously distributed to the recovery system by the guide plate integrated with the recovery plate, and distributed to the recovery system slitter, pulverizer, etc. via the take-up rolls 16 and 17. At this time, the sorting push roll 13 prevents a sorting failure due to welding burrs by a laser or the like.
[0036]
When this distribution is completed, the distribution roll 12 is raised, the laser head 10 is returned to the initial point a, and the laser guide plates 8 and 9 are also detached. The rolls 19 and 21 stop after rotating for a predetermined time.
[0037]
【The invention's effect】
In the present invention, the film can be securely gripped by a clip of an apparatus that conveys the film while gripping both sides of the film with a plurality of clips, and the film is not contaminated with dust or the like, and has a simple structure. Therefore, it is easy to manufacture and the width can be changed very easily.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an overall configuration of an embodiment of an automatic feeding apparatus according to the present invention.
FIG. 2 is a side view of a laser head portion used in an embodiment of the automatic feeding device of the present invention.
FIG. 3 is a cross-sectional view of a guide shooter used in an embodiment of the automatic feeding device of the present invention.
FIG. 4 is a cross-sectional view of the guide shooter used in one embodiment of the automatic feeding device of the present invention as seen from the side.
FIG. 5 is a cross-sectional view of the guide shooter used in one embodiment of the automatic feeding device of the present invention as seen from above.
FIG. 6 is a diagram showing a cutting method using a laser.
FIG. 7 is a diagram showing a cutting method using a laser.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Automatic feeding apparatus 2 ... Transverse stretching apparatus 3 ... Film 3a ... Narrow film part 10 ... Laser head 12 ... Sorting roll 15 ... Tenter sorting roll 18 ... Guide shooter 30 ... Clip chain

Claims (2)

A film cutting means provided on the upstream side of an apparatus for conveying while holding both sides of a film with a plurality of clips, and a film cutting means provided movably in the width direction of the film, and a narrow film formed by the cutting means A guide shooter for guiding the section to one clip, and a film transport means for transporting the film in the guide shooter. The guide shooter includes a shooter body that can advance and retreat in the width direction, and a lateral side of the shooter body. An automatic feeding device comprising a side plate for opening and closing the opening   2. The film according to claim 1, further comprising a distribution unit capable of changing a film conveyance path to the guide shooter or the collection system between the film cutting unit and the guide shooter for guiding the film to the clip. Automatic feeding device

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