JPH01252394A - Device for forming split onto film - Google Patents

Abstract

PURPOSE:To enable a reinforced seamless film to be efficiently manufactured by rocking a needle roll to the lateral direction of the film, which is pierced into the film from the slit of a guide member, and thereby forming splits continuously in the lateral direction. CONSTITUTION:A guide member 1 and a needle roll 17 are rotated to the same direction with the same circumferential speed with a motor 7 operated, and a transfer belt 2 follows the guide member 1 so as to be rotated. Simultaneously, a crank mechanism 27 allows the needle roll 17 to be reciprocated to the axial direction against the guide member 1. In this place, when a plastic film is forwarded between the guide member 1 and the belt 2, the film F is moved from the top to the front while the both ends of the film is being held between the grasping section 1a of the guide member and the belt 2. During the period of the time, the needle 18 of the roll 17 is projected out of a slit 1b with the rotation so as to be pierced into the film F for allowing the film F to be split by the movement in the axial direction so that the needle is drawn back into the slit 1b again thereafter. Splits can thereby be formed in the lateral direction of the film F by repeating the abovesaid operations.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention relates to a split forming apparatus that continuously forms splits (cuts) in the width direction of a thermoplastic film stretched mainly in the width direction. Regarding.

[Conventional technology]

Conventionally, devices that form splits in the length direction of a film are known, but no device that continuously forms splits in the width direction of the film has been developed.

[Problem to be solved by the invention]

Therefore, in order to manufacture a reinforced film in which two thermoplastic films with splits formed in the stretching direction are bonded together with their stretching directions, that is, the direction in which the splits are formed, being perpendicular to each other, it is necessary to stretch them in the length direction. Form a split in the longitudinal direction of the thermoplastic film, cut the thermoplastic film in a dimension that is approximately the same as the width of the film, and form a split in the same manner as above with the thermoplastic film fragment. It is manufactured by adhering to another thermoplastic film with the splits perpendicular to each other. However, in this method, the split film is cut to a predetermined length and then bonded to another thermoplastic film, so the work efficiency is low and there are problems in that seams appear in the product.

SUMMARY OF THE INVENTION An object of the present invention is to provide a split forming apparatus that can continuously form splits in the width direction of the film, thus enabling efficient production of a seamless reinforced film.

[Means to solve the problem]

In order to achieve the above object, the present invention disposes a guide member having a slit in the transport path of the film transported in the length direction by the transport device, and on the opposite side of the film transport surface of the guide member, A needle roll is provided which is rotated in the film transport direction by a rotational drive device at a speed substantially the same as the film transport speed to cause needles implanted on the outer peripheral surface to protrude from the slits of the guide member and pierce the film; The needle roll is provided with a swinging device for swinging the needle roll relative to the film in the width direction of the film.

[Operation] While the transfer device is operated to transfer the film along a guide member having slits, a needle roll having needles implanted on its outer peripheral surface is moved by a rotational drive device in the film transfer direction at approximately the same speed as the film. While rotating, the swinging device is operated to swing the needle roll relative to the film in the width direction of the film.

By the above operation, the needles of the needle roll protrude from the slits of the guide member and pierce the film, and swing relative to each other in the width direction of the film to form a split in the width direction of the film.

〔Example〕

FIGS. 1 and 2 show an embodiment of the present invention, and the reference numeral l in the figures represents a cylindrical guide member. This guide member!
guides the thermoplastic film F stretched in the width direction (the width direction is the left-right direction in Figure 1), and guides the left and right ends (the left end is omitted in Figure 1, but the right A fixing groove la is formed on the outer peripheral surface of the thermoplastic film F to fix the side edge of the thermoplastic film F in cooperation with the endless transfer belt 2. , la
In between, a large number of slits 1b long in the length direction of the guide member l are arranged in parallel at predetermined intervals in the circumferential direction, and the frame 3
It is rotatably supported in the circumferential direction by a bearing 4. An internal gear 5 and a sprocket wheel 6 are integrally attached to the right end of this guide member l in FIG.
The rotational force of the motor 7 is transferred to the reducer 8, the coupling 9, the timing pulley lO, the timing belt 11. It is configured to be rotated in the circumferential direction by being received by the sprocket wheel 6 via a timing pulley 12, a transmission (or reduction gear) 13, a sprocket wheel 14, and a chain 15.

Further, reference numeral 17 is a needle roll having a large number of needles 18 implanted all over its outer peripheral surface. Note that only a portion of the needle 18 is depicted in the figure. This needle roll 17 is movably axially and rotatably circumferentially supported by a rotating shaft 20 supported by a bearing 19 of the frame 3 (the left bearing 9 and the rotating shaft 20 are omitted in FIG. 1). ) is inserted into the eccentric position of the guide member I, and receives the rotation of the internal gear 5 via the gear 21 meshed with the internal gear 5 and the rotating shaft 20, and the guide member 1 The needle 18 is rotated in the same direction and at the same circumferential speed, and is configured to cause the needle 18 to protrude upward from the slit lb at the upper part of the guide member l, and to pierce the thermoplastic film F. Further, a crank mechanism 27 is connected to the rotating shaft 20, which is operated by the motor 7 via a rotating shaft 22, a timing pulley 23, a timing belt 24, a timing pulley 25, and a bevel gear box 26. The crank mechanism 27 rotates the needle roll 17 to open the slit tb.
A needle 1 protrudes from and pierces the thermoplastic film F.
The needle roll 17 is moved a predetermined distance together with the rotating shaft 20 while the film F is being pulled out from the film F, and the film F is split in the width direction by the needles 18 by the movement of the needle roll 17.

The transfer belt 2 has its outer peripheral surface partially fitted into the clamping IRI a of the guide member I, and is connected to the two presser pulleys 28.
and is wound around one tension pulley 29.

Note that the motor 7, transmission 13, etc. constitute a rotational drive device, the crank mechanism 27 constitutes a swinging device, and the transfer belt 2 and the clamping groove Ia constitute a transfer device for the film F. .

Next, the operation of the split forming apparatus for the film according to the present invention configured as described above will be explained.

When the motor 7 is operated, the guide member 1 and the needle roll 17
The transfer belt 2 rotates in the same direction at the same circumferential speed, and the transfer belt 2 rotates following the guide member l, and the crank mechanism 27 causes the needle roll 17 to rotate in the axial direction of the assembled roll 17 with respect to the guide member 1. Travel back and forth. When the thermoplastic film F is fed between the guide member l and the transfer belt 2 in this state of deafness, the thermoplastic film F is sandwiched between the clamping groove 1a of the guide member l and the transfer belt 2 with its both side edges. Move from right to left in Figure 2.

While the thermoplastic film F is moving in contact with the outer peripheral surface of the guide member 1 in this way, the needles 1 of the needle roll 17
As the needle roll 17 rotates, the guide member 8 successively projects outward from the slit 1b of the guide member l to pierce the film F. After cutting the film F by the axial movement of the needle roll 17, the guide member 8 is inserted again from the slit tb. Retract into the interior of section 1. By continuously repeating the above action, splits are formed in the width direction of the thermoplastic film F.

3 and 4 show another embodiment of the present invention, the guide member 31 is fixed to a fixed frame 32, and the needle roll 33 is connected to a rotating shaft 34 by a bearing 35 (left side in FIG. 4). The rotating shaft 34 and the bearing 35 are omitted), and is provided at an eccentric position within the guide member 31 so as to be freely rotatable in the circumferential direction, and transmits the rotational force of a rotational drive device (not shown) to the sprocket wheel 36. received and rotated within the guide member 31,
The needle 37 is configured to protrude outward from a sleeve 31a of the guide member 31.

Also, transfer belts 38 and 39 that pinch the side edges of the thermoplastic film F and transfer the film F to the protruding part of the needle 37
Or the presser pulleys 40, 41 and the tension pulley 42,
43, and the pulley 44 of the blank roll 46, and the idler pulley 45 are provided so as to be wound around them. Each of the above pulleys 40~
45 is pivotally supported by a swinging frame 48 that swings left and right in FIG. ing. Reference numerals 50 and 51 are guide rollers that facilitate the interlocking movement of the swing frame 48.

Note that two upper transfer belts 38 are installed in parallel, and one lower transfer belt 38 is installed in parallel.
It is configured to sandwich both side edges of the film F in cooperation with the book transport belt 39. The rotation drive device that rotates the needle roll 33 and the drive system that operates the crank mechanism 49 are the same as or similar to those of the first embodiment. In this embodiment, the lower transfer belt 39 is caused to rotate in the same direction and at the same speed as the needle roll 33 by a rotary drive.

In the above configuration, the needle roll 33 and the transfer belt 39 are operated, and the swinging frame 48 is operated by the crank mechanism 49.
When the film F is fed between the transfer belts 38 and 39 while swinging from side to side, the film F passes between the brush roll 46 and the guide member 31 with its both sides sandwiched between the transfer belts 38 and 39. , moving from right to left in Figure 3.

When the thermoplastic film F passes under the brush roll 46, the needles 37 of the needle roll 33 protrude upward from the slit 31a and pierce the film F.
The film F is torn horizontally by the oscillating width by the lateral movement of the film F accompanying the oscillating movement, thereby forming a split in the same manner as in the first embodiment. In the above, the brush roll 46 is rotated clockwise in FIG. 3 by the transfer belt 38 to prevent the film from escaping upward and to ensure the penetration of the needle 37.

In this embodiment, the transfer belts 38 and 39 constitute a transfer device, and the crank mechanism 49 constitutes a rocking device.

In addition, throughout the above two embodiments, the needle includes not only a general needle with a sharp tip but also a knife-like needle. Further, the transfer device, rotation drive device, and swing device are not limited to those shown in the drawings, and may have other structures. The brush roll 46 of the second embodiment can be employed in the apparatus of the first embodiment.

〔Effect of the invention〕

As explained above, in the device for forming a split on a film according to the present invention, a guide member having a slit is disposed in the transport path of the film transported in the length direction by the transport device, and the film is transported by the guide member. On the opposite side of the surface, a needle implanted in the outer shoulder is rotated in the film transport direction by a rotational drive device at a speed substantially the same as the film transport speed, and is caused to protrude from the slit of the guide member and pierce the film. A needle roll is provided to pass through the needle, and
The needle roll is equipped with a swinging device that swings the needle roll relative to the film in the width direction of the film, so that the needle roll is connected to the split in the width direction of the thermoplastic film. can be formed. For this reason,
It becomes possible to manufacture a seamless reinforced film efficiently and at low cost.

[Brief explanation of the drawing]

1 and 2 show a first embodiment of the present invention, FIG. 1 is a front view of the guide member etc. cut in the length direction, and FIG.
The figure is a side view of the guide portion, etc., cut in the diametrical direction. 3 and 4 show a second embodiment of the present invention, FIG. 3 is a side view of the guide member etc. cut in the diametrical direction, and FIG.
The figure is a front view of the guide member etc. cut in the length direction. 1.31... Guide member, Ib, 31a... Slit, 2, 38.39... Transfer belt, 7... Motor, 17.33... Needle roll, 18.37... Needle ,2
7゜49...Crank mechanism, F...Film.

Claims (1)

[Claims] A guide member having a slit is disposed in the transport path of the film transported in the length direction by the transport device, and on the opposite side of the film transport surface of the guide member, the film transport speed is controlled in the film transport direction by a rotary drive device. A needle roll is provided, which is rotated at approximately the same speed as the needle roll so that needles implanted on the outer circumferential surface of the film protrude from the slits of the guide member and pierce the film. 1. An apparatus for forming a split on a film, characterized in that a swinging device for swinging the film in a direction relative to the film is attached.