JP2000177897A - Suction roll and carrier of film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a suction roll smoothly changing the destination in releasing the suction in the suction roll carrying sheet materials while sucking them and provide a film carrier, and a film manufacturing device and method using this suction roll. SOLUTION: This paper presents a suction roll 1 provided with annular suction parts 3 having suction holes 2 arranged circumferentially and annular grooves 4 having no suction hole 2 alternately arranged in a roll outer circumferential face in the roll shaft direction, a film carrier provided with a guide plate 13 having insertion parts 12 inserted into the grooves 4 of the suction roll 1, and a film manufacturing device and method using this carrier.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suction roll suitable for transporting a sheet-like material, especially a plastic film, and a film transport apparatus using the same.

[0002]

2. Description of the Related Art A technique using a suction roll having a large number of suction holes as a roll for conveying a sheet-like material is known (for example, Japanese Utility Model Laid-Open No. 4-132924 and Japanese Patent Laid-Open No. 9-67053). The suction hole is usually
The sheet is provided substantially over the entire surface of the sheet conveying section on the roll surface, and the sheet is conveyed while being suctioned to the outer peripheral surface of the roll by sucking air into the inside of the roll through a suction hole.

[0003]

However, when a sheet-like material is conveyed using the above-mentioned suction roll, for example, when switching of the destination of the sheet-like material is required, a certain destination is required. In some cases, it may be necessary to adsorb the sheet-like material to the roll surface and release the adsorption to other destinations, that is, to stop the air suction operation of the suction roll. When such a switching operation is required, especially when a relatively stiff film such as a plastic film is being conveyed, the film may be sent in the same direction as when the film is suctioned even if the suction is released. There is. Therefore, the switching of the running direction of the film is not performed smoothly, and in some cases, a process trouble may be caused.

[0004] It is an object of the present invention to provide a suction roll capable of transporting a sheet-like material while being suctioned, and capable of smoothly changing the transport destination when releasing suction. is there.

Another object of the present invention is to provide a film transport apparatus using such a suction roll, a film manufacturing apparatus, and a method.

[0006]

In order to solve the above-mentioned problems, a suction roll according to the present invention does not have, on the outer peripheral surface of the roll, an annular suction portion in which suction holes are arranged in a circumferential direction and a suction hole. The annular groove and the annular groove are alternately arranged in the roll axis direction.

In this suction roll, the width of the groove is preferably in the range of 10 to 100 mm.
Such a suction roll is particularly suitable for use in transporting a film.

[0008] A film transport apparatus according to the present invention comprises such a suction roll and a movable guide plate provided with a portion for inserting the suction roll into a groove. The guide plate may be moved by sliding or swinging about a fulcrum. In addition, this guide plate, together with the insertion portion,
A structure having a portion facing the suction portion of the suction roll, that is, a structure in which the distal end portion of the guide plate is formed in an uneven shape along the suction portion and the groove of the suction roll can be provided.

In the above-mentioned film transport apparatus, a nip roll (for example, a rubber surface material) is disposed opposite to a suction roll with the film interposed therebetween.
May be provided. This nip roll can be configured as a flat roll whose roll surface is flush with the roll axis direction.However, an annular nip portion facing the suction portion of the suction roll and an annular groove facing the suction roll groove are used. It may have a structure having.

The film manufacturing apparatus according to the present invention is provided with means for switching the running direction of the supplied film between a direction for introducing the film into the tentering device and a direction for not introducing the film before the entrance of the tentering device. In film production equipment,
The running direction switching means includes a film transport device as described above. The method for producing a film according to the present invention comprises a method characterized by using such an apparatus.

In the suction roll according to the present invention as described above, at the time of the suction operation, the conveyed sheet-like material, for example, a film is sucked by the suction portion having the suction hole, and the film is brought into close contact with the roll surface. While being sent in a predetermined direction. At the time of suction release, the suction part and the groove are alternately arranged in the roll axis direction, and the groove exists adjacent to the suction part, so that the film existing on the groove separates from the roll surface. Is facilitated. Accordingly, when the running direction of the film is switched to a direction different from the direction at the time of the suction by releasing the suction, the film is easily separated from the roll surface, and the film is smoothly fed out in the changed direction.

Further, since the suction portion and the groove are alternately arranged, the insertion portion of the guide plate having a tip shape along the suction portion can be easily inserted into the groove of the suction roll. By inserting the insertion part of the guide plate into the groove of the suction roll, the film conveyed on the suction part of the suction roll can be reliably guided onto the guide plate. By moving (for example, swinging) between a position where the film is inserted into the groove and a position where the film is not inserted, switching of the running direction of the film is further facilitated.

Further, by applying such a film transport device to the film running direction switching means provided in front of the entrance of the film tentering device, the direction in which the film is introduced into the tentering device is prevented. Switching with the direction can be performed smoothly and easily.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a suction roll according to an embodiment of the present invention. The suction roll 1 has, on the outer peripheral surface of the roll, an annular suction portion 3 in which a large number of suction holes 2 are arranged in the roll circumferential direction, and an annular groove 4 having no suction holes 2. A plurality of suction parts 3 and grooves 4 are arranged alternately in the roll axis direction.
The width of each groove 4 is preferably in the range of 10 to 100 mm.

FIGS. 2 and 3 show a film transport apparatus 10 using the suction roll 1 shown in FIG. 1 according to an embodiment of the present invention. The film 11 is transported in the direction of the arrow in the figure. This film transport device 10
Has a suction roll 1 shown in FIG. 1 and a guide plate 13 having an insertion portion 12 that can be inserted into the groove 4 of the suction roll 1. The guide plate 13 has, at its distal end, a portion 14 facing the suction portion 3 of the suction roll 1 in addition to the insertion portion 12. Therefore, the distal end of the guide plate 13 is formed in an uneven shape in which the insertion portions 12 and the suction portion facing portions 14 are alternately arranged.

In the present embodiment, the guide plate 13 is supported so as to be swingable about a fulcrum 15, and is swung to a position where the insertion portion 12 of the guide plate 13 is inserted into the groove 4 of the suction roll 1. Then, the film 11 is moved to the arrow d1 in FIG.
(At this time, the suction operation through the suction hole 2 is preferably stopped), and when it is swung to a position where it is separated from the inside of the groove 4, it is sent in the direction of the arrow d2 (this direction). At the time, the suction operation through the suction hole 2 is performed).

The movement of the guide plate 13 for switching the transport direction of the film 11 may be performed by slide movement (for example, parallel movement) (not shown) in addition to the above-mentioned swing.

Further, as shown in FIG. 4, for example, a nip roll 21 can be provided for the suction roll 1. In this embodiment, the nip roll 21 is provided as shown in FIG.
As shown in FIG. 2, a space is formed between an annular nip portion 22 which faces the suction portion 3 of the suction roll 1 and nips the film between the suction portion 3 and the groove 4 which faces the groove 4 of the suction roll 1. And an annular groove 23 forming the same.

The film transport device 10 as described above is
For example, as shown in FIG.
A film running direction switching means 52 for switching the film 11 supplied from the longitudinal stretching machine 51 between a direction in which the film 11 is supplied to the tentering device 50 and a direction in which the film 11 is not introduced is applicable to the film manufacturing apparatus. . A film crusher 53 is provided below the film running direction switching means 52.

In the film running direction switching means 52, the film 11 supplied from the longitudinal stretching machine 51
After passing through the tension roll 31 and the guide roll 32, the rotary cutter 35 can cut in the width direction between the nip device 33 and the nip device 34. The rotary cutter 35 includes a rotary blade 36 and a fixed blade 37, and the film 1 is sheared or pushed by both blades.
1 is cut off. On the downstream side of the nip device 34, the traveling direction of the film is selectively switched.
A switching flap 38 is provided that is swingably supported about a fulcrum 38a. When the switching flap 38 is controlled to a position indicated by a solid line in FIG. When the position is controlled to the position shown by the broken line in FIG. 6, it is sent in a direction in which it is not introduced, that is, in the direction of the crusher 53.

In the present embodiment, a discharge belt conveyor 39 is disposed below the switching flap 38 so that the fed film 11 can be fed smoothly and reliably to the pulverizer 53 below. Has become. Crusher 5
A feed roll 40 is provided at the entrance of the film 3, and the film 11 is fed at a predetermined speed between the rotary blade 41 and the fixed blade 42.

The film running direction switching means 52 and the crusher 53 constitute a standby means 43 for switching the film 11 to a direction in which the film 11 is not introduced into the tentering device 13 and crushing the film 11 which has not been introduced in order to collect it. are doing.

In the tentering device 50, a number of running clips 46 are arranged on both sides of the film 11 in an endless annular shape.
In 4, both ends of the film 11 are gripped by closing the clip 46 by the opening / closing means 47. The introduction of the film 11 into the tentering device 50 can be performed via a transport belt 45 that can move back and forth and up and down. The operation of the transport belt 45 and the operation of the film traveling direction switching means 52 are controlled by the control device 54. The switching of the switching flap 38 in the introduction direction causes the start end of the film 11 to be moved to the transport belt 45. , And a series of operations up to engagement with the clip 46 can be automatically performed.

The lower roll 34a of the nip device 34 of the film running direction switching means 52 in the film production apparatus as described above uses a suction roll having the same configuration as the suction roll 1 described above, and the upper roll. A nip roll having the same configuration as that shown in FIGS. Further, as the switching flap 38, a guide plate having a configuration similar to that shown in FIGS. 2 and 3 is used.

When the film traveling direction switching means 52 is switched in the direction of introduction into the tentering device 50 by the switching flap 38, the film 11 in the standby state, which is collected by the crusher 53, is firstly rotated by the rotary cutter 35 in the width direction. The switching flap 38 is switched from the broken line position to the solid line position in FIG. 6, and the leading end (cut end) of the cut film 11 is cut.
By the switching flap 38.
To the paper passing direction.

At the entrance of the tentering device 50, a film transport belt 45 for guiding the film 11 oriented in the introduction direction by the film traveling direction switching means 52 to the film gripping start position 44 of the tentering device 50 is provided. And
Both sides of the film 11 transported to the film gripping start position 44 are gripped by the clips 46.

Film 1 using the above-mentioned switching flap 38
In the switching of the running direction in (1), when the film 11 is fed in the direction of the crusher 53, the film 11 is satisfactorily adhered to the surface of the roll 34a by the suction of air by the suction roll 34a, and the running direction is downward. It is directed in the direction of the belt conveyor 39. When the film 11 is fed in the direction of being introduced into the tentering device 50, the suction is released, and the film 11 nipped between the nip roll 34b and the nip device 34 is not attracted to the suction roll 34a.
Go straight to 0 direction.

As described above, the required attraction force is controlled and controlled according to the switched direction, and the film 11 is smoothly fed in the target direction.

The film transport device according to the present invention is not limited to the above-mentioned film traveling direction switching means 52, but can be applied to any transport portion of the film manufacturing apparatus. In particular, it is suitable for a part that requires switching of the traveling direction.

Further, the suction roll according to the present invention comprises:
The present invention is applicable not only to a film but also to any other sheet-like material, and is suitable for a sheet-conveying portion, particularly a portion requiring switching of the running direction.

[0031]

As described above, according to the suction roll of the present invention, when a sheet-like material such as a film is conveyed, the conveyance destination can be switched smoothly and easily by controlling the suction operation. Become.

Further, according to the film transport apparatus, the manufacturing apparatus and the method according to the present invention, even if the film is weak, the film transport destination can be smoothly switched by the suction roll and the guide plate. Will be possible. In particular, a great effect can be obtained by applying the present invention to the film traveling direction switching means provided in front of the entrance of the tentering device.

[Brief description of the drawings]

FIG. 1 is a plan view of a suction roll according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of a film transport device according to an embodiment of the present invention.

FIG. 3 is a plan view of the apparatus of FIG. 2;

FIG. 4 is a partial perspective view of a film transport device according to an embodiment of the present invention.

5 is an enlarged partial cross-sectional view of the device of FIG.

FIG. 6 is a schematic configuration diagram of a film manufacturing apparatus according to an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Suction roll 2 Suction hole 3 Suction part 4 Groove 10 Film conveyance device 11 Film 12 Insertion part 13 Guide plate 14 Suction part opposing part 15 Support point 21 Nip roll 22 Annular nip part 23 Annular groove 31 Tension roll 32 Guide roll 33, 34 Nip Apparatus 34a Suction roll 34b Nip roll 35 Rotary cutter 36 Rotary blade 37 Fixed blade 38 Switching flap (guide plate) 39 Discharge belt conveyor 40 Feed roll 41 Rotary blade 42 Fixed blade 43 Standby means 44 Film gripping start position 45 Film transport belt 46 Clip 47 Clip opening / closing means 50 Tendering device 51 Longitudinal stretching machine 52 Film running direction switching means 53 Film crusher 54 Control device

Continued on the front page (72) Inventor Toshiya Nishibayashi 1-1-1 Sonoyama, Otsu-shi, Shiga F-term in the Shiga Plant of Toray Co., Ltd. (reference) 3F103 AA03 BC02 BC04 BC08 BC10

Claims (10)

[Claims] An annular suction portion having suction holes arranged in a circumferential direction and an annular groove having no suction holes are alternately arranged in the roll axial direction on the outer peripheral surface of the roll. Suction roll. 2. The suction roll according to claim 1, wherein the width of the groove is in a range of 10 to 100 mm. 3. The suction roll according to claim 1, which is used for transporting a film. 4. A film transport apparatus comprising: the suction roll according to claim 1; and a movable guide plate having a portion inserted into the groove of the suction roll. 5. The film transport device according to claim 4, wherein the guide plate is configured to be swingable. 6. A guide plate having the insertion portion and a portion opposed to a suction portion of a suction roll.
Or the film transport device according to 5. 7. The film transport device according to claim 4, further comprising a nip roll disposed opposite to the suction roll with the film interposed therebetween. 8. The film transport device according to claim 7, wherein the nip roll has an annular nip portion facing the suction portion of the suction roll and an annular groove facing the groove of the suction roll. 9. A film manufacturing apparatus comprising: means for switching a running direction of a supplied film between a direction in which the supplied film is introduced into the tentering device and a direction in which the film is not introduced before the entrance of the tentering device. Claims 4 to 5 in the direction switching means.
8. A film manufacturing apparatus, comprising the film transport apparatus according to any one of the above items 8. 10. A method for producing a film, comprising using the apparatus according to claim 9.