JP2010264631A - Film forming apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide turning rollers attaining smooth and efficient operation of reversing a film while changing a reversing direction in a film forming apparatus. <P>SOLUTION: Each of the first and second turning rollers 17, 18 includes a rotating support shaft 19 rotatably supported to a support bar that constitutes a transfer part, and a plurality of slide units 20 provided at the outer periphery of the rotating support shaft 19 and comprising circumferentially divided film guide parts 20a and slide displacement parts 20b. Each film guide part 20a is configured to rotate integrally with the rotating support shaft 19 and to be displaceable in the axis direction of the rotating support shaft 19. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a technical field of a film forming apparatus for forming a film formed into a tube shape, for example, so as to be wound around a winding body as a sheet shape.

Generally, in a film manufactured by an inflation method, for example, a molten resin is blown out at a film forming portion to form a tube-shaped film, and the tube-shaped film is cooled and condensed and cured as it extends upward. After that, the tube-like film is flattened with a pinch roller into a sheet shape, transferred to a cylindrical winding body in a state of being repeatedly reversed at a transfer section provided with a plurality of guide rollers, and wound on the winding body. Things to take are known. In this film, a thick part and a thin part are formed on the film due to various external factors such as the accuracy of the opening of the forming die and the cooling process of the film extending from the die. Phenomenon is generated in the width direction, and when the film is wound around the winding body as a sheet, the thick part is tightly wound and the thin part is softly wound When the film is rewound from the winding body, it may have a wrinkle like a wave. When this happens, there is a problem that secondary processing such as printing becomes difficult. Therefore, conventionally, a pinch roller for flattening the tube-like film is configured to be rotatable, and the portion where the tube-like film is flattened is continuously changed in the circumferential direction, whereby the film is formed into a sheet shape. When the thickness of the film is uneven, the uneven position of the film is dispersed in the width direction so that the wound state on the wound body becomes uniform. In this case, since the pinch roller rotates, the winding body is disposed at a fixed position. Therefore, two of the guide rollers for guiding the film extending from the pinch roller toward the winding body are provided. The guide roller is configured as a turning roller that rotates following the pinch roller, and the film is reversed while changing the reversal direction, whereby the film is transferred to a fixed winding body.
However, when the direction of reversal of the film is changed by the turning roller, the film draws a winding line on the outer peripheral surface of the turning roller, that is, not only in the rotational direction but also in the axial direction. If the turning roller simply rotates around the axis, the film cannot be smoothly reversed and transferred. Therefore, while making the turning roller cylindrical, a plurality of through holes were opened in the tubular portion, and air was blown out from the inside of the tubular hole through the through holes, so that the film was floated from the outer peripheral surface of the turning roller. As a structure to be reversed in a state, a structure that allows smooth reversal, transfer and protection of a film has been proposed.

Japanese Patent Publication No. 1-21901

  However, since the conventional turning roller is configured to float and reverse the film by air blowing pressure, it is difficult to adjust the air blowing pressure so that the film floats over the entire length in the width direction. There is a problem that the outer peripheral surface of the roller for use may be rubbed and damaged. Furthermore, in the case where the film itself has a non-slip property, it may not only rub against the outer peripheral surface of the turning roller, but may be caught by the turning roller. Depending on the type of film, such turning may occur. There is also a problem that the roller for use cannot be used, and these have problems to be solved by the present invention.

The present invention has been created in view of the above-described circumstances in order to solve these problems, and the invention of claim 1 provides a sheet-like film extending from a forming portion and a transfer portion. In the film forming apparatus that is wound on the winding body via, when the transfer unit is provided with a turning roller that reverses the film while changing the reversing direction of the film, the turning roller constitutes the transferring unit. A rotation support shaft that is rotatably supported by a support member, and a plurality of divided bodies that are provided on the outer periphery of the rotation support shaft and that are provided with a film guide section that is divided in the circumferential direction. The film forming apparatus is characterized in that the guide portion is configured to rotate integrally with the rotation support shaft and be freely displaceable in the axial direction of the rotation support shaft.
In the invention of claim 2, the divided body includes an arcuate film guide portion having an outer peripheral surface concentric with the rotation support shaft, and a slide displacement portion that is displaced in the axial direction of the rotation support shaft. The film forming apparatus according to claim 1, wherein the film forming apparatus is a film forming apparatus.
In the invention of claim 3, the film guide portion is displaced in one axial direction as the film is reversed, and a return means for returning the film guide portion displaced in the axial direction one to the original position is provided in the turning roller. The film forming apparatus according to claim 1, wherein the film forming apparatus is provided.
According to a fourth aspect of the present invention, the divided body is supported by a plurality of support plates projecting in the outer diameter direction along the axial direction from the outer peripheral surface of the rotation support shaft, and at least at both ends in the axial direction of each of the support plates. 2. A pulley according to claim 1, and an endless film guide portion that is suspended between the pulleys and is displaced in the axial direction of the rotation support shaft based on the rotation of the pulley. This is a film forming apparatus.

According to the first, second, and fourth aspects of the invention, the film can be brought into contact with the turning roller and can be reversed smoothly in a stable state, thereby improving workability.
According to the third and fourth aspects of the invention, the film can be reversed endlessly by the film guide section, and the workability can be further improved.

It is a whole side view explaining a film forming apparatus. 2A, 2B, and 2C are side views of the film transfer unit, a plan view of the film transfer unit when the film flattening unit is located at the reference position, and the film flattening unit being the first rotation position. It is a top view of the film transfer part in the case of being located in. It is a side view of the roller for the 1st and 2nd turning in 1st embodiment. It is XX sectional drawing in FIG. It is a side view of the roller for turning in a 2nd embodiment. It is a partial cross section front view explaining the roller for diverting in 3rd embodiment. It is XX sectional drawing in FIG. It is an expanded view explaining the relationship between the film guide part and guide body in 3rd embodiment. It is side surface sectional drawing of the roller for turning in 4th embodiment. It is an expanded view explaining the relationship between the film guide part and guide body in 4th embodiment. It is a side view of the diverting roller in the fifth embodiment. It is XX sectional drawing in FIG.

Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.
In FIG. 1 and FIG. 2A, reference numeral 1 denotes an inflation-type film forming apparatus. The film forming apparatus 1 stores and supplies a resin material that is a synthetic resin such as polyethylene, for example, Based on a heating cylinder 3 for melting the resin material supplied from the hopper 2, a driving device 4 as an extruder for driving a screw (not shown) built in the heating cylinder 3, and driving of the driving device 4 A die 6 that discharges and extrudes molten resin conveyed from the heating cylinder 3 by a rotating screw as a tubular film 5 having a predetermined thickness, and a tube that is discharged from the die 6 and extends upward. Air ring 7 for cooling the film-like film 5 from the outside, a tube-like fill provided above the air ring 7 and cooled by the air ring 7 5 is provided above the anti-sway device 8, and the tube-like film 5 is flattened into a sheet shape, and the sheet-like film 5 is formed into a winding body (not shown). A film collecting device 9 for winding is provided.

The film recovery device 9 includes a film flattening portion 9a that makes the tube-like film 5 into a sheet shape, and a film transfer portion that guides the sheet-like film 5 toward the winding body via an inversion path that repeatedly inverts the sheet-like film 5 9b (corresponding to the transfer portion of the present invention), and the film 5 extending from the film flattening portion 9a is transferred toward the take-up body based on the rotational drive of the take-up body. It is comprised so that.
The film flattened portion 9a corresponds to a constituent member of the molded portion of the present invention, and a base 10 that is fixedly installed on the outer peripheral portion of the tube-shaped film 5 and pivots with respect to the base 10 It is provided with a revolving body 11 that is freely provided and is provided to rotate in the forward and reverse directions on the outer peripheral portion of the film 5. The revolving body 11 is disposed in an inclined manner so that the distance between the opposite ends becomes narrower toward the upper end, and a pair of guide plates 11a that guide the tube-like film 5 into a sheet shape, and the widths of these guide plates 11a A pair of support bodies 11b located at both ends in the direction and projecting upward from the guide plate 11a are provided, and the film 5 is placed on the guide plate 11a on the upper end portion of the support body 11b. A pinch roller 11c flattened into a shape is rotatably supported.

A support bar 11d that protrudes further upward is provided at the upper end of each of the supports 11b, and a film transfer unit 9b that transfers the film 5 to the support 11b and the support bar 11d toward the winding body. Is provided. The film transfer section 9b is configured using first to fifth guide rollers 12, 13, 14, 15, 16 and first and second turning rollers 17, 18 in which the present invention is implemented. In addition, the film 5 is guided in a predetermined transport direction by appropriately hanging the film 5 around these rollers 12 to 18. The first to third guide rollers 12, 13, and 14 are rotatably supported by a support 11b. The film 5 rotates integrally with the revolving body 11 and extends upward from the pinch roller 11c. Is guided (transferred) toward the upper left of the pinch roller 11c.
Further, the fourth guide roller 15 and the first and second turning rollers 17 and 18 constitute a reversing path by being rotatably supported by the support bar 11d through support means described later, The film 5 guided from the third guide roller 14 is configured to be repeatedly reversed.
Further, the fifth guide roller 16 is rotatably supported by a bracket (not shown) whose both end portions are positioned and fixed in the vicinity of the winding body, and extends from the reversing path that turns and displaces together with the turning body 11. It is comprised so that the film 5 to guide may be guide | induced to a winding body.

  Here, the configuration of the inversion path will be described in detail. As described above, the fourth guide roller 15 and the first and second turning rollers 17 and 18 are supported adjacent to the support bar 11d in the vertical direction via the support means. The support means for the fourth guide roller 15, the first and second turning rollers 17, 18 are respectively fitted with fitting portions 15a, 17a, 18a that are pivotably fitted to the support bar 11d, and the fitting portions 15a. , 17a, 18a projecting in the outer diameter direction, arm portions 15b, 17b, 18b, and roller support portions 15c, 17c, 18c provided at the projecting ends of the arm portions 15b, 17b, 18b (in the support member of the present invention) Equivalent). The fourth guide roller 15 is provided at an intermediate portion in the vertical direction of the first and second turning rollers 17 and 18, and the arm portion 15 b of the fourth guide roller 15 is formed by the first and second turning rollers 17 and 18. The first and second turning rollers 17 and 18 are set so as to be positioned in the vicinity immediately above the film 5 extending from the pinch roller 11c. On the other hand, the fourth guide roller 15 is set to be located on the left side of the first and second turning rollers 17 and 18 and on the upper left side of the third guide roller 14 in FIG. The fourth guide roller 15, the first and second turning rollers 17, 18 are respectively fitted portions when the swing body 11 (support body 11 b, support bar 11 d) is pivotally displaced with respect to the base 10. 15a, 17a, and 18a are configured to pivot appropriately with respect to the support bar 11d, whereby a pinch roller 11c that pivots integrally with the pivoting body 11, and first, second, and third guide rollers 12, 13 are configured. , 14 is set so as to be turned and displaced with a predetermined angle described later.

  The film 5 extending in a sheet form from the pinch roller 11c is supplied with the second turning roller 18 via the first, second, and third guide rollers 12, 13, and 14 as the winding body is driven to rotate. , The first reversal (arrow A) is made, and the second reversing roller 18 hangs around and reaches the fourth guide roller 15 to make the second reversal (arrow B), and the fourth guide. A third reversal (arrow C) is performed by being wound around the roller 15 and reaching the first turning roller 17, and is wound around the first turning roller 17 and reaching the fifth guide roller 16. Is reversed (arrow D). As described above, the sheet-like film 5 extending from the pinch roller 11c of the film flattening portion 9a is repeatedly provided in the reversing path constituted by the fourth guide roller 15 and the first and second turning rollers 17 and 18. In the state of being reversed, it is guided to the fifth guide roller 16 side, and is wound around the winding body via the fifth guide roller 16.

  In this step, the turning body 11 of the film flattening portion 9a is configured to repeat forward and reverse turning (reciprocating turning) at a preset speed, as shown in FIGS. 2 (A) and 2 (B). The pinch roller 11c and the fifth guide roller 16 provided in a fixed manner are parallel to each other as a reference position, and as shown in FIG. 2 (C), the second pivoting 90 degrees counterclockwise in a plan view. A reciprocating turn (oscillate) between a position turning 180 degrees via one turning position and a position turning 180 degrees via a second turning position turning 90 degrees clockwise in plan view from the reference position ) Is configured to. In this way, by flattening (folding) the film 5 extending in a tube shape while reciprocatingly rotating the guide plate 11a and the pinch roller 11c, the folding location continuously changes in the circumferential direction, It is comprised so that the uneven position of the film 5 used as the sheet form may be disperse | distributed to the width direction.

  As shown in FIGS. 2A and 2B, when the film flattened portion 9a is at the reference position, the first to fifth guide rollers 12, 13, 14, 15, 16, and the first The second turning rollers 17 and 18 are all in parallel with each other. On the other hand, when the turning body 11 turns, each of the rollers 12, 13, 14, 15, 17, 18 other than the fifth guide roller 16 turns following the turning of the turning body 11, but the fourth guide roller 15 Is set so as to turn in the same direction at a turning angle that is half the turning amount of the first to third guide rollers 12, 13, and 14. As shown in FIG. 2C, the first to third guide rollers 12, 13, and 14 are set to turn 90 degrees similarly to the turning body 11, and the fourth guide roller 15 is set to turn 45 degrees. Yes. At this time, the first and second turning rollers 17 and 18 are configured to be pivotally displaced at an appropriate pivot angle with respect to the pivot displacement of the first to fourth rotating rollers 12, 13, 14, and 15, The second turning roller 18 is a position between the third guide roller and the fourth guide roller 15, and is opposite to the reference straight line M with the fourth guide roller 15 as a reference at the first turning position. The first turning roller 17 is located between the fourth guide roller 15 and the fifth guide roller 16 at a position turned 22.5 degrees in the clockwise direction. The four guide rollers 15 are set so as to be located at a position turned 22.5 degrees in the clockwise direction.

  With this configuration, the film 5 hung around the first and second turning rollers 17 and 18 is hung so that the trajectory of both side edges in the width direction draws a spiral line. The first and second turning rollers 17 and 18 of the first embodiment are reversed while changing the turning direction from the direction reaching the first and second turning rollers 17 and 18 (up to 45 degrees). Although the film 5 is reversed while changing the reversal direction, the film 5 is not damaged in a state where the film 5 is in contact with the outer peripheral surfaces of the first and second turning rollers 17 and 18. It can be reversed, and is configured so that smooth and stable inversion can be realized. The first and second turning rollers 17 and 18 have the same configuration in this embodiment.

Each of the first and second turning rollers 17 and 18 shown in FIGS. 3 and 4 includes a rotation support shaft 19 that is rotatably supported by a pair of roller support portions 17c and 18c that constitute support means. Has been. The rotation support shaft 19 is composed of a pair of base shafts 19b supported by a pair of roller support portions 17c and 18c via bearings 19a, and a large-diameter cylindrical body 19c integrally connecting the base shafts 19b. The slide units 20 corresponding to the divided bodies of the present invention divided into a plurality of circumferential directions are radially provided on the outer periphery of the large-diameter cylindrical body 19c.
In the present embodiment, eight slide units 20 are provided on the outer periphery of the rotation support shaft 19 (large-diameter cylindrical body 19 c), and each slide unit 20 is concentric with the rotation support shaft 19. The film guide portion 20a that reverses the film 5 is provided on the inner peripheral surface of the film guide portion 20a, and the film guide portion 20a is displaced in the axial direction on the outer periphery of the rotary support shaft 19. And a slide displacement portion 20b. In the present embodiment, the slide displacement portion 20b is composed of a rail body 20d and a traveling body 20e that smoothly slide and displace with the ball body 20c interposed therebetween. Then, the rail body 20d of the slide displacement portion 20b is integrally fixed to the outer peripheral surface of the large-diameter cylindrical body 19c, while the traveling body 20e is integrally fixed to the inner peripheral surface of the film guide portion 20a. The film guide portion 20a of the slide unit 20 rotates integrally with the rotary support shaft 19 and is configured to be displaceable in the axial direction of the rotary support shaft 19 based on the traveling body 20e traveling on the rail body 20d. Has been.
In the present embodiment, the rail body 20d is divided into two in the axial direction, and the traveling body 20e is provided at two locations on the film guide portion 20a corresponding to each rail body 20d. . At this time, the length of each rail body 20d is set based on the length of the traveling body 20e in the axial direction and the displacement stroke in the axial direction required when the film 5 is reversed. Of course, 20d may be provided over the entire length of the large-diameter cylindrical body 19 in the longitudinal direction.

  Further, projecting pieces 19d projecting outward are provided at both ends in the axial direction of the large-diameter cylindrical body 19c, and pulleys 19e are supported by the projecting pieces 19d. Further, one end portion of a connecting wire 20f extending toward the outer end side in the axial direction is connected to an end portion on the outer side in the axial direction of each traveling body 20e provided in each slide unit 20. The other end of each of the connecting wires 20f is hung around a pulley 19e provided at each end of the slide unit 20 in the axial direction, and is opened through four base holes that are displaced from the base shaft 19b in the axial direction. One of the holes 19f passes through one through hole 19f, and is opposed to the slide unit 20 to which one end of the connecting wire 20f is connected in the diametrical direction (with an interval of 180 degrees) on the slide unit 20 side. It is configured to be pulled out and connected to the outer ends in the axial direction of the traveling body 20e via pulleys 19e provided at the respective ends in the axial direction of the slide unit 20 facing in the diameter direction. Yes. As a result, as shown in FIG. 4, the slide units 20 facing each other in the diametrical direction are connected so that the film guide portions 20a are annularly connected via the connecting wires 20f that are connected to each other at both axial ends. As the film guide portion 20a of one slide unit 20 is displaced in one axial direction, the film guide portion 20a of the other slide unit 20 facing in the diametrical direction is the same as the one film guide portion 20a. It is configured so as to be displaced toward the other axial direction in the displacement stroke.

In the reversing path provided with the first and second turning rollers 17 and 18 configured as described above, the first and second turning rollers 17 and 18 move with respect to the fifth guide roller 16 as the turning body 11 turns. The film 5 that comes into contact with the plurality of film guide portions 20a of the slide unit 20 divided into eight in the circumferential direction in the first and second turning rollers 17, 18 The first and second turning rollers 17 and 18 are reversed while rotating along the outer peripheral surface of the first and second turning rollers 17 and 18 and being displaced in the axial direction of the rotary support shaft 19. As a result of this displacement, it is configured to rotate integrally with the rotation support shaft 19 and to be displaced in the axial direction of the rotation support shaft 19. As a result, the film 5 is reversed while being in contact with the first and second turning rollers 17 and 18, but the film 5 is not damaged by rubbing the film guide portion 20a. It is configured so that it can be reversed.
Incidentally, in the case where the flattened portion 9a is in the standard posture and the film 5 is reversed without changing the reverse direction by the first and second turning rollers 17 and 18, the film 5 has the film guide portion 20a in the axial direction. It is configured to be smoothly reversed without being displaced.

  Here, as shown in FIG. 1, the film 5 is set so as to be reversed based on the first and second turning rollers 17 and 18 being rotated and displaced 180 degrees. For this reason, for example, when paying attention to the arbitrary film guide portion 20a, the arbitrary film guide portion 20a is displaced in one axial direction together with the film 5 by a rotational displacement of 180 degrees from the state in which the film 5 abuts. To do. When the rotational displacement of 180 degrees is made, the arbitrary film guide portion 20a is displaced in one axial direction with a predetermined displacement stroke. On the other hand, the film guide portion 20a of the slide unit 20 (hereinafter referred to as the connected film guide portion 20a) opposed to the arbitrary film guide portion 20a in the diametrical direction and connected in a ring shape by the connecting wire 20f is the arbitrary film guide portion. As 20a is displaced in one axial direction at a predetermined displacement stroke, it is displaced in the other axial direction by the same displacement stroke, and the arbitrary film guide portion 20a completes the rotational displacement of 180 degrees and the film 5 As the contact with the film is released, the film 5 comes into contact with the connected film guide portion 20a to start displacement in one axial direction. Thereby, the film guide portions 20a opposed to each other in the radial direction are configured to be displaced in the opposite directions in the axial direction every half rotation, that is, to be reciprocally reversed in the axial direction every rotation of 180 degrees. This configuration corresponds to the return means of the present invention, whereby the first and second turning rollers 17 and 18 can be smoothly reversed without damaging the film 5 in an endless manner. Has been.

  In the present embodiment configured as described, in order to flatten the winding state of the film 5 around the wound body, the flattening portion 9a of the film collecting device 9 is configured to be pivotally displaced. The first and second turning rollers 17 and 18 rotate with the turning displacement of the turning body 11 of the flattened portion 9a. In this turning state, the film 5 is reversed while changing the displacement in the axial direction in the first and second turning rollers 17 and 18, that is, the reversing direction. In this case, the first, The second turning rollers 17 and 18 are configured by a slide unit 20 including a film guide portion 20a in which an outer peripheral surface for guiding the film 5 is divided into a plurality of circumferential directions, and each film guide portion 20a Following the displacement, the first and second turning rollers 17 do not damage the film 5 because they are integrally rotated together with the rotary spindle 19 and displaced in the axial direction of the rotary spindle 19. , 18 can be reversed while being in contact with the film guide portion 20a. As a result, the configuration of the turning roller does not become complicated like the conventional film that floats and inverts it, and it can be stably and smoothly inverted, Workability can be improved.

  Further, in this structure, the film guiding portion 20a is displaced in one axial direction when the film 5 is reversed while changing the reversing direction. In this case, the return means is a slide unit 20 facing the diameter direction. Since the film guide portions 20a are reciprocally reversed and displaced in the axial direction every 180 degrees of rotation of the film guide portions 20a, the film guide portions 20a are connected in a ring shape by the connecting wires 20f. It can be reversed endlessly without damaging it, and the workability can be further improved.

Of course, the present invention is not limited to the previous embodiment, and the turning angle of the turning body in the film flattening portion is not limited to that of the first embodiment, but is an appropriate angle. Can be set to
Further, the number of divisions in the circumferential direction of the turning roller is not limited to eight as in the first embodiment, and can be set based on various conditions such as the outer diameter of the roller. .
Hereinafter, other examples will be described. Of course, the turning rollers described in these examples can be used instead of the first and second turning rollers shown in the first embodiment. Further, it is a turning roller that can be used in a configuration different from that of the first embodiment, and is used for reversing the film while changing the reversing direction.

The turning roller 21 shown in the second embodiment shown in FIG. 5 includes two upper and lower first rollers configured by the rotation support shaft 19 (large diameter cylindrical body 19c) and the slide unit 20 of the first embodiment. The second rollers 22 and 23 are configured to be used as one turning roller. Details of the configuration of the two first and second rollers 22 and 23 are omitted by giving the same reference numerals as those of the first embodiment.
Then, when the reversing roller 21 is used to reverse the film 5 while changing the reversing direction at a predetermined angle, the second roller 23 pulls out upward at a half angle of the predetermined angle. The film is transferred to the first roller 22, and is turned by the first roller 22 to change the direction by a half of a predetermined angle. The displacement stroke in the axial direction of the guide portion 20a is configured to be half of the total displacement stroke necessary for the film 5 to reverse.
Thus, as in the first embodiment, the film 5 can be smoothly reversed without damaging the film 5 while being in contact with the turning roller 21, and each of the first and second films can be reversed. There is an advantage that the displacement stroke in the axial direction of the film guide portion 20a of the rollers 22 and 23 can be shortened.

Further, FIGS. 6, 7 and 8 show a third embodiment.
The turning roller 24 of the third embodiment includes a rotation support shaft 25 and a divided body 26 that is divided into a plurality of parts (in the present embodiment, divided into eight parts) in the circumferential direction. The rotation support shaft 25 is composed of a fixed shaft 25a and a large-diameter cylindrical body 25b that is rotatably fitted to the fixed shaft 25a. The fixed shaft 25a is integrated with a support member that constitutes a transfer unit. It is configured to be supported. Eight divided bodies 26 are provided radially on the outer periphery of the large-diameter cylindrical body 25b.
As in the first embodiment, the divided body 26 includes an arc-shaped film guide portion 26a having an outer peripheral surface concentric with the rotation support shaft 25, and a slide displacement portion 26b. The rail body 26c constituting the slide displacement portion 26b is divided into two in the axial direction, fixed to the outer peripheral surface of the large-diameter cylindrical body 25b, and the two traveling bodies 26d traveling on each rail body 26c are provided on the film guide portion 26a. It is fixed to the inner peripheral surface. The film guide portion 26a rotates integrally with the large-diameter cylindrical body 25b (the rotation support shaft 25), and the traveling body 26d travels on the rail body 26c. It is configured to be freely slidable.
Even in this case, the film guide portion 26a can be displaced following the rotational displacement and axial displacement of the film 5, so that the film 5 is damaged in a state where the film 5 is in contact with the film guide portion 26a. In addition, it can be reversed smoothly.

  Further, in this device, guide bodies 27 are provided at both ends in the axial direction of the fixed shaft 25a as return means for returning the film guide portion 26a displaced in one axial direction along with the reversal of the film 5 to the original position. ing. That is, guide rollers 26e are provided at both ends in the axial direction of the film guide portion 26a, while ring-shaped guide bodies 27 formed in a mountain shape are formed at both ends in the axial direction of the fixed shaft 25a. 27a faces inward in the axial direction, and the top portions 27a are integrally fixed in a state where they are at the same position in the circumferential direction. Then, as in the film guide portion 26a on the left side in FIG. 6, the state where the guide rollers 26e at both ends interfere with the top portions 27a of the guide bodies 27 provided at both ends in the axial direction is set as the neutral position. Is set to From this state, when the film guide 26a is rotated 180 degrees and displaced in one axial direction by reversing the reversing direction of the film 5, it reaches the hem 27b of the guide body 27. Then, by rotating 180 degrees, the guide roller 26e reaches the top portion 27a while being guided by the chevron surface of the guide body 27, thereby returning to the neutral position. Thereby, it is comprised so that the film 5 can be reversed endlessly. FIG. 8 is a developed view for explaining the relationship between the guide body 27 and the film guide portion 26a. The height (length) of the top portion of the guide body 27 is the maximum in the axial direction when the film 5 is reversed. It is formed corresponding to the displacement stroke.

Further, the turning roller 28 according to the fourth embodiment shown in FIGS. 9 and 10 includes two upper and lower second rollers each composed of a rotating support shaft 25 (a fixed support shaft 25a and a large-diameter cylindrical body 25b) and a divided body 26. The first and second rollers 29 and 30 are configured to be used as one turning roller. The details of the configuration of these two first and second rollers 29 and 30 will be omitted by attaching the same reference numerals as those in the first embodiment. And in this thing, the film guide part 26a will be displaced following the rotational displacement of the film 5 and the displacement of an axial direction, and the film 5 is damaged in the state which contact | abutted to the film guide part 26a. And can be reversed smoothly.
Furthermore, in this, each film guide portion 26a of the divided body 26 constituting each of the first and second rollers 29 and 30 has a displacement stroke in the axial direction when the film 5 is reversed, so that the third embodiment As shown in FIG. 10, the guide bodies 31 provided at both ends in the axial direction of the fixed shaft 25a constituting the rotary support shaft 25 are as high as the top portion 31a. (Length) can be set to half of the guide body of the third embodiment, and the angle range of rotation with the film 5 in contact is 90 degrees, so the film guide 26c is restored. The guide body 31 on the side to be moved can be inclined gently, and the return operation can be performed more smoothly.

Next, a turning roller 32 according to a fifth embodiment shown in FIGS. 11 and 12 will be described.
The turning roller 32 includes a rotation support shaft 33 that is rotatably supported by a support member of the transfer unit, and a plurality of circumferentially divided parts 34 that are provided on the outer periphery of the rotation support shaft 33. The divided body 34 includes a plurality of (eight) support plates 34a projecting from the outer peripheral surface of the rotation support shaft 33 in the axial direction along the axial direction, and both axial ends of the support plates 34a. The main pulley 34b to be supported, the belt body 34c as an endless film guide portion suspended between the main pulleys 34b, and the main pulley 34b are supported at an appropriate interval to be supported, It comprises a plurality of sub pulleys 34d that prevent the slack of the belt body 34c. And the film 5 is comprised so that it may invert by contacting the outer diameter side site | part of the belt body 34c currently hung around each division body 34, At this time, the belt body 34c as a film guide body is The support plate 34a is rotationally displaced based on the integral rotation with the rotation support shaft 33, and is displaced endlessly based on the rotation of the main and sub pulleys 35b, 35d, thereby being displaced in the axial direction. In the state where the film 5 is in contact with the belt body 34c, the film 5 can be smoothly reversed without being damaged.
In this case, there is an advantage that it is not necessary to separately provide a return means because the belt body 34c rotates between the main pulleys 34b endlessly.

  INDUSTRIAL APPLICABILITY The present invention can be used for a transfer path in which a film is formed by an inflation method and the film is reversed while changing the reversal direction.

DESCRIPTION OF SYMBOLS 1 Film forming apparatus 2 Hopper 5 Film 9 Film collection | recovery apparatus 9a Film flattening part 9b Film transfer part 11 Revolving body 11a Guide plate 11d Support bar 12 First guide roller 17 First turning roller 17a Fitting part 18 For 2nd turning Roller 19 Rotating support shaft 19b Base shaft 19c Large-diameter cylindrical body 20 Slide unit 20a Film guide portion 20b Slide displacement portion 20d Rail body 20e Traveling body

Claims (4)

In a film forming apparatus in which a sheet-like film extending from a forming unit is wound on a winding body via a transfer unit, the turning roller reverses the transfer unit while changing the reverse direction of the film. A rotating support shaft that is rotatably supported by a support member that constitutes the transfer portion, and a film guide portion that is provided on the outer periphery of the rotation support shaft and divided in the circumferential direction. The film guide portion of each divided body is configured to rotate integrally with the rotation support shaft and to be displaceable in the axial direction of the rotation support shaft. Film forming equipment. The divided body includes an arc-shaped film guide portion having an outer peripheral surface concentric with the rotation support shaft, and a slide displacement portion that is displaced in the axial direction of the rotation support shaft. The film forming apparatus according to claim 1. The film guide portion is displaced in one axial direction as the film is reversed, and the turning roller is provided with return means for returning the film guide portion displaced in one axial direction to the original position. The film forming apparatus according to claim 1 or 2. The divided body includes a plurality of support plates that protrude in the outer diameter direction along the axial direction from the outer peripheral surface of the rotation support shaft, pulleys that are supported at least at both ends in the axial direction of each of the support plates, and between the pulleys. The film forming apparatus according to claim 1, further comprising an endless film guide portion that is suspended by the pulley and is displaced in the axial direction of the rotation support shaft based on rotation of the pulley.

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