JP5507603B2 - Simultaneous biaxial stretching device for sheet - Google Patents

Description

  The present invention relates to a simultaneous biaxial stretching apparatus for a sheet capable of simultaneously stretching longitudinal and transverse biaxial axes of a sheet such as a thermoplastic resin film.

  The simultaneous biaxial stretching device for a sheet is a device that arranges clip circulating devices on the left and right sides, grips both side edges of the sheet with clips, and performs simultaneous stretching in the longitudinal and lateral directions of the sheet. As follows: an endless chain composed of a link of equal length links connected in a horizontally swingable manner by alternately using one vertical shaft tool and the other vertical shaft tool, a sprocket for driving the endless chain, A clip and a clip side guide connected to the vertical shaft, a clip opposite guide connected to the other vertical shaft, a reference rail that guides the clip side and defines a circular path of the clip; Some have a pitch setting rail that guides the guide on the opposite side of the clip and variably sets the pitch between adjacent clips depending on the distance from the reference rail (for example, a special feature). Documents 1 and 2).

Special table 2006-513069 JP2004-122640A

  By the way, the simultaneous biaxial stretching device for seats removes the vertical shaft tool from the isometric link and attaches or removes part or all of the chain from the rail to perform maintenance / inspection or exchange with a new chain, or isometric link. In some cases, the vertical shaft tool is removed from the cable to increase or decrease the isometric links for replenishment to cope with changes in stretching conditions.

  However, in the stretching device described in Patent Document 1, the upper and lower rollers of the clip side guide pass through the upper and lower positions of the support that is joined to the upper and lower intermediate parts of the reference rail, and are joined to the upper and lower middle parts of the pitch setting rail. Since the upper and lower rollers of the guide on the opposite side of the clip pass above and below the support, it is necessary to separate and install the lower roller during maintenance inspections and chain replacements, and to increase or decrease the isometric links Later, it is necessary to mount the lower roller, and much labor is required to separate and mount the lower roller.

  In addition, the stretching machine described in Patent Document 2 has a structure in which each roller of the clip side guide and the clip opposite side guide can be inserted into and removed from the groove of each rail, but the clip is positioned at the height of each roller. Since the structure is such that the sheet is pulled to extend at a higher position, the chain or the like is overcome so as to overcome the moment generated in the direction in which each roller of the guide device on the opposite side of the clip is pulled out of the rail groove and derailed by this pulling force. It is necessary to prevent the derailment of the roller by making it heavier, and there is a problem that the running performance of the chain is deteriorated by a heavy chain or the like.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a simultaneous biaxial stretching device for a sheet that makes it possible to easily attach / detach a chain to / from a rail and increase / decrease the isometric links, and to prevent the traveling performance of the chain from being deteriorated.

The means employed by the present invention according to the first aspect of the present invention in order to make it easy to attach / detach the chain to / from the rail and to increase / decrease the isometric links, as shown in FIGS. , An endless chain 4 composed of a connected body of equal-length links 8 (8A, 8B) that are horizontally swingably connected using one vertical shaft tool 6 and the other vertical shaft tool 7 alternately, and an endless chain 4, the clip 3 and the clip side guide 10 connected to one vertical shaft tool 6, the clip opposite side guide tool 20 connected to the other vertical shaft tool 7, and the clip side guide tool 10 to guide the clip 3 and define the circulation path Q of the clip 3, and guide the clip opposite guide 20, and between the adjacent clips 3 and 3 by the distance G between the reference rail 30 and the reference rail 30. A clip circulating device 2 (2A, 2B) having a pitch setting rail 31 for variably setting the pitch P is disposed on the left and right sides, and both side edges Sa, Sa of the sheet S are gripped by the clip 3 and the sheet S In the simultaneous biaxial stretching apparatus 1 for a sheet that performs simultaneous stretching in the machine direction (MD) and the transverse direction (TD), the clip 3 and the clip side guide tool 10 are connected to one vertical shaft tool 6 so as to be horizontally swingable. The clip side guide 10 is attached to the clip side attachment 17 and includes vertical axis rollers 11 and 12 that sandwich the reference rail 30 from both sides, and a horizontal axis roller 13 that contacts the upper end surface of the reference rail 30. The extended virtual horizontal surface 3a ′ of the sheet gripping space 3a of the clip 3 is positioned in the vertical guide areas 11b-2 and 12b-2 of the roller guide surfaces 11b-1 and 12b-1 of the rollers 11 and 12, and the reference rail 30 As the clip side guide 10 is moved up and down for attachment and detachment, the vertical guide rollers 11 and 12 on both sides of the clip side guide 10 and the roller guide surfaces 11b-1, 12b-1, 13b- of the horizontal shaft roller 13 are provided. 1 is formed so that the rail space J surrounded by 1 (see FIG. 9) can be inserted and removed in the vertical direction, and the clip opposite side guide 20 includes vertical axis rollers 21 and 22 that sandwich the pitch setting rail 31 from both sides, and pitch setting. A horizontal axis roller 23 abutting on the upper end surface of the rail 31 is provided, and the extended virtual horizontal plane is located above the upper and lower guide areas 21b-2 and 22b-2 of the roller guide surfaces 21b-1 and 22b-1 of the vertical axis rollers 21 and 22. 3a ′ is positioned, and the pitch setting rail 31 is moved up and down for attachment and detachment of the clip opposite guide 20 and the vertical axis rollers 21 on both sides of the clip opposite guide 20 are arranged. The rail space K (see FIG. 9) surrounded by the roller guide surfaces 21b-1, 22b-1, and 23b-1 of the horizontal shaft roller 23 and the horizontal axis roller 23 is formed so that it can be inserted and removed in the vertical direction. This is a simultaneous biaxial stretching apparatus for a sheet.

  In the first aspect of the present invention, the rail space J of the clip-side guide 10 that moves up and down for attachment and detachment can be inserted into and removed from the reference rail 30 in the up and down direction. Therefore, since the rail space K of the guide device 20 on the opposite side of the clip that moves up and down can be inserted into and removed from the pitch setting rail 31 in the vertical direction, one vertical shaft tool 6 and the other vertical shaft tool 7 are connected. The part of the pulled-out chain 4 can be inserted and removed from the reference rail 30 and the pitch setting rail 31 in the vertical direction. Further, most of the tensile force F (F1 and F2) (see FIG. 6) of the sheet S generated in the clip 3 due to simultaneous biaxial stretching and the reaction force R (R1 and R1) received by the clip-side guided tool 10 from the reference rail 30. Since R2) is balanced on the extended virtual horizontal plane 3a ′, the weight of the chain 4 or the like from the viewpoint of preventing the chain derailment without causing a large moat that derails the clip side guide 10 or the clip opposite side guide 20. There is also no need to increase. Further, since the reaction force U (U1, U2, U3) acting on the clip opposite guide 20 from the pitch setting rail 31 with the extension in the longitudinal direction (MD) is positioned below the extended virtual horizontal plane 3a ′, the clip There is no need to generate a large moat that derails the side guide 10 or the clip opposite guide 20, and it is not necessary to increase the weight of the chain 4 or the like from the viewpoint of preventing chain derailment.

  In order to make the chain run smoothly, the means adopted by the present invention according to claim 2 is that, as shown in FIG. 3, the driven roller 32 meshing with the sprocket 5 is pivotally supported by the vertical shaft 7 and the sheet of the clip 3 is supported. The simultaneous biaxial stretching apparatus for sheets according to claim 1, wherein the extended virtual horizontal surface 3 a ′ of the gripping space portion 3 a passes through the height position of the driven roller 32.

  In the present invention described in claim 2, the driving force transmitted from the sprocket 5 to the chain 4 is the tensile force F (F1 or F2) of the sheet S generated in the clip 3 by simultaneous biaxial stretching (see FIG. 6). Therefore, the bending moment that impairs the running of the chain generated on the chain virtual vertical plane can be eliminated or very small.

  The simultaneous biaxial stretching device for a seat according to the present invention according to claim 1 can simplify the attachment / detachment of the chain to / from the rail and the increase / decrease of the isometric link, and it is also necessary to increase the weight of the chain etc. in order to prevent the chain derailment. Because it is not, the running performance of the chain is not deteriorated.

  The simultaneous biaxial stretching apparatus for a sheet according to the present invention described in claim 2 can drive the chain smoothly.

1 is a plan view showing an embodiment of a simultaneous biaxial stretching device for sheets according to the present invention (hereinafter referred to as “the present stretching device”). It is the top view to which the part enclosed by the square C2 of the broken line of FIG. 1 was expanded. 2A is a cross-sectional front view taken along line C3-C3 in FIG. 2, FIG. 2B is a front view further enlarging the vicinity of the clip-side guide 10, and FIG. It is the front view which expanded further. FIG. 3 is a front view taken along C4-C4 of FIG. It is the front view which decomposed | disassembled the structure shown by FIG. 3 (A) into each member. It is the top view to which the part enclosed by the square C6 of the broken line of FIG. 1 was expanded. FIG. 7 is a front view taken along section C7-C7 in FIG. FIG. 7 is a front view taken along section C8-C8 of FIG. It is a front view which shows the state which isolate | separated the clip side guide tool 10 and the clip other side guide tool 20 from the reference | standard rail 30 and the pitch setting rail 31 with the chain 4. FIG.

  As shown in FIGS. 1 and 3, the stretching device 1 of the present invention according to the present embodiment has the clip circulating devices 2 (2 </ b> A, 2 </ b> B) arranged on the left and right sides, and the side edges Sa, Sa of the sheet S are clipped 3. And the sheet S is stretched simultaneously in the machine direction (MD) and the transverse direction (TD). Each of the left and right clip circulators 2A (2B) includes a plurality of equal-length links 8 (8A, 8B) in which one vertical shaft tool 6 and the other vertical shaft tool 7 are alternately connected in a horizontally swingable manner. Endless chain 4 comprising a connecting body, front and rear sprockets 5 and 5 for driving the chain 4, clip 3 and clip side guide 10 connected to one vertical shaft 6, and connection to the other vertical shaft 7 The clip opposite guide 20, the reference rail 30 that guides the clip guide 10 to define the circulation path Q of the clip 3, and the separation distance G between the clip opposite guide 20 and the reference rail 30. Is provided with a pitch setting rail 31 for variably setting the pitch P between adjacent clips 3 and 3. As shown in FIG. 3, the stretching device 1 of the present invention includes a clip 3 and a clip side guide 10 connected to one vertical shaft tool 6 via a clip side connector 17, and a clip opposite side guide 20 It is connected to the other vertical shaft tool 7 via the clip opposite side connection tool 27.

  In the stretching apparatus 1 of the present invention, the left and right clip circulating apparatuses 2A and 2B are covered with a heat treatment apparatus indicated by a one-dot chain line in FIG. 1, and a preheating region is formed from the inlet (front side) side to the outlet (rear side) side of the sheet S. The simultaneous biaxial stretching region, the heat setting region, and the cooling region are configured in this order.

  2 to 8, the endless chain 4 includes a pair of upper and lower flat outer links 8A and 8A, and an inner link between two adjacent outer links 8A and 8A. 8B is disposed, and both ends of the inner link 8B are sandwiched between the outer links 8A and 8A of each set, and the clip side ends of one set of the outer links 8A and 8A and the inner link 8B are connected to one vertical shaft tool. 6 and the other set of outer links 8A and 8A and the inner link 8B are connected to the other end of the clip on the other side by means of the other vertical shaft 7 to be moved horizontally. It is formed in a scale. As shown in FIGS. 4 and 3A, the inner link 8B is formed by joining the upper and lower plate-like flange portions 8Ba, 8Ba and the web portion 8Bb by welding or the like so as to be light and have increased rigidity. ing. The endless chain 4 has a clip-side space portion 8Bc and a clip-opposite space portion 8Bd formed on both sides of the inner link 8B between the flange portions 8Ba and 8Ba, and the clip-side connector 17 disposed in the clip-side space portion 8Bc. The bearing portion 17a is rotatably connected by one vertical shaft tool 6, the clip side connector 17 is swingably connected, and the driven roller 32 disposed in the clip opposite space portion 8Bd is connected to the other vertical shaft tool. 7 is rotatably supported. Between the upper and lower flange portions 8Ba, 8Ba of the inner link 8B and the driven roller 32, flat washers 33, 33 (see FIG. 5) for smooth rotation of the driven roller 32 are arranged. Further, the endless chain 4 is rotatably connected to the bearing portion 27a of the clip opposite side connector 27 arranged at a position below the clip opposite side connected by the other vertical shaft member 7 by the other vertical shaft member 7. And the clip opposite side connection tool 27 is connected so that rocking | fluctuation is possible.

  As shown in FIG. 3 (A), the clip 3 closes the upper and lower clip gripping portions 3c, 3c (in the state indicated by the solid line in the drawing) to grip the sheet edge portion Sa, and to move the upper and lower clip gripping portions 3c, 3c is opened (a state indicated by a two-dot chain line in the figure) so that the sheet edge portion Sa is not gripped.

  As shown in FIG. 5 and FIG. 3 (A), the one (clip side) vertical shaft 6 has a head-attached shaft 6a, a collar 6b, and a set ring that fits to the end of the head-attached shaft 6a. 6c combination. The other (the opposite side of the clip) vertical shaft 7 is a combination of a bolt 7a and a lock nut 7b.

  As shown in FIGS. 5 and 3A, the clip side connector 17 includes a bearing portion 17a connected to one vertical shaft 6, and an upper grip portion 17b and a lower grip portion for gripping the clip 3 from above and below. 17c, a joint portion 17d disposed between the bearing portion 17a and the lower gripping portion 17c, a bolt 17e for joining the bearing portion 17a and the joint portion 17d, and a bolt and nut 17f for joining the joint portion 17d and the lower gripping portion 17c. A bolt 17g that is screwed into a female screw portion 17k provided in the lower gripping portion 17c and joins the upper gripping portion 17b and the lower gripping portion 17c to grip the clip 3, and a female screw portion 3b provided in the clip 3. The clip side guide 10 is attached to the lower gripping portion 17c and a bolt 17h that joins the clip 3 by screwing.

  As shown in FIGS. 3B and 5, the clip side guide 10 includes a pair of vertical axis rollers 11 on the clip side that sandwich the reference rail 30 from both sides, and two sets of vertical axis rollers 12 on the opposite side of the clip. 12 and a set of horizontal shaft rollers 13 that come into contact with the upper end surface of the reference rail 30. The clip-side vertical shaft roller 11 includes a vertical shaft 11a composed of bolts and nuts 17f of the clip-side connector 17, a roller body 11b composed of a roller bearing or the like rotatably supported by the vertical shaft 11a, It consists of a constant collar 11c that adjusts the height position of the roller body 11b. Each set of vertical shaft rollers 12 on the opposite side of the clip includes a roller main body portion 12b disposed in a laterally recessed portion 17a-1 recessed in the bearing portion 17a of the clip side connector 17, and a vertical shaft inserted into the bearing portion 17a. The roller main body 12b is rotatably supported on the vertical shaft 12a. The horizontal shaft roller 13 includes a horizontal shaft 13 a that is inserted into a mounting hole 17 a-2 provided in a bearing portion 17 a of the clip side connector 17 and fixed by a bolt 17 e, and a bearing portion 17 a and a joint portion of the clip side connector 17. A roller body 13b made of roller bearings and the like disposed in a space 17m (see FIGS. 3A and 3B) formed between 17d, and a set ring 13d fitted to the shaft end of the horizontal shaft 13a. And a roller collar 13c that adjusts the height position of the roller body 13b. The roller body 13b is rotatably supported on the horizontal shaft 13a.

  As shown in FIG. 6, the clip-side guide 10 includes two sets of vertical axis rollers 12 and 12 on the opposite side of the clip, so that the reaction force R (R1, R2) received from the reference rail 30 along with the extension is two. The clip-side connector 17 is dispersed in the vertical axis rollers 12 and 12 and is orthogonal or substantially orthogonal to a virtual straight line connecting the two contact positions of the vertical axis rollers 12 and 12 in contact with the reference rail 30 in plan view. The posture extends along the direction.

  As shown in FIGS. 9 and 3 (B), the clip side guide 10 has one set of vertical axis rollers 11, two sets of vertical axis rollers 12, 12 (only one set is shown in these drawings, 2 are illustrated in FIG. 2), and are surrounded by the roller guide surfaces 11 b-1, 12 b-1, 12 b-1, and 13 b-1 of the pair of horizontal shaft rollers 13, and the front and rear and the bottom are opened. A rail space J is formed, and the rail space J can be inserted and removed in the vertical direction with respect to the reference rail 30 as it moves up and down for attachment and detachment.

  As shown in FIGS. 3 (A) and 3 (B), the clip-side guide 10 includes the vertical guide regions 11b-2, 12b- of the roller guide surfaces 11b-1, 12b-1 of the vertical shaft rollers 11, 12, 12. An extended virtual horizontal surface 3a ′ of the sheet gripping space 3a of the clip 3 (a space formed between the clip gripping portions 3c and 3c by gripping the sheet edge portion Sa) is positioned in the position 2. As a result, the clip circulating device 2 (2A, 2B) is configured so that most of the tensile force F (F1 or F2) of the sheet S generated in the clip 3 due to simultaneous biaxial stretching in the state shown in FIG. The reaction force R (R1 and R2) 10 receives from the reference rail 30 is balanced on the extended virtual horizontal plane 3a ′ (see FIGS. 3A and 3B), and the clip side guide 10 and the clip opposite side guide A large moat that causes the tool 20 to derail from the rails 30 and 31 does not occur, and it is not necessary to adopt an increase in the weight of the conventional chain 4 or the like from the viewpoint of preventing chain derailment. I will not let you.

  As shown in FIGS. 3A and 5, the clip opposite side connector 27 includes a bearing portion 27 a that is rotatably connected to the lower end side of the other vertical shaft 7, and two pins on the bearing portion 27 a. 27b (only one is shown in these drawings) and an extension portion 27c connected thereto, and the clip opposite side guide 20 is attached. The clip opposite side connector 27 is provided so as to be located below the height position of the driven roller 32 so as not to collide with the front and rear sprockets 5, 5 that mesh with the driven roller 32.

  As shown in FIGS. 3A, 3B and 5, the clip opposite side guide 20 has two sets of vertical axis rollers 21 and 21 on the clip side sandwiching the pitch setting rail 31 from both sides (one set in these drawings). Only two sets are shown in FIG. 2) and a set of vertical axis rollers 22 on the opposite side of the clip and a set of horizontal axis rollers 23 in contact with the upper end surface of the pitch setting rail 31. It has. Each set of vertical shaft rollers 21 on the clip side includes a vertical shaft 21a composed of vertical pins 27b of the clip opposite side connector 27, a roller main body portion 21b rotatably supported on the vertical shaft 21a, and a roller main body portion. It consists of a constant collar 21c that adjusts the height position of 21b and a set ring 21d that is fitted to the lower end of the vertical shaft 21a. The vertical shaft roller 22 on the opposite side of the clip includes a roller main body portion 22b disposed below the extension portion 27c of the clip opposite side connector 27 and a through hole 27c-1 provided in the extension portion 27c of the clip opposite side connector 27. A vertical shaft 22a with a head inserted into the head, a distant collar 22e for adjusting the height position of the roller main body portion 22b, and a set ring 22d fitted to the end of the vertical shaft 22a with a head, A roller body 22b is rotatably supported on the vertical shaft 22a. Further, the horizontal shaft roller 23 is inserted into the mounting hole 27a-2 provided in the bearing portion 27a of the clip opposite side connector 27 and fixed by the set pin 23e, and the clip opposite side connector 27 is connected to the horizontal shaft roller 23. A roller body 23b made of a roller bearing or the like disposed in a space 27d formed between the bearing 27a and the extension 27c, a distance collar 23c for adjusting the height position of the roller body 23b, and a horizontal shaft 23a The roller main body 23b is rotatably supported on the horizontal shaft 23a.

  As shown in FIG. 9 and FIG. 3C, the clip opposite side guide tool 20 is a guide for each of two sets of vertical shaft rollers 21, 21, one set of vertical shaft rollers 22, and one set of horizontal shaft rollers 23. A rail space K that is surrounded by the surfaces 21b-1, 22b-1, and 23b-1 and that is open at the front and rear and below is formed. Can be inserted and removed vertically.

  As shown in FIGS. 3 (A) and 3 (C), the clip opposite side guide tool 20 includes upper and lower guide areas 21b-2 and 22b of the roller guide surfaces 21b-1 and 22b-1 of the vertical axis rollers 21, 21, and 22, respectively. The extended virtual horizontal surface 3a ′ of the sheet gripping space 3a of the clip 3 is positioned above −2. Thereby, the clip circulating device 2 (2A, 2B) reacts to the clip opposite guide 20 from the pitch setting rail 31 along with the extension in the longitudinal direction (MD) of the simultaneous biaxial extension in the state shown in FIG. Since U (U1, U2 or U3) is located below the extended virtual horizontal plane 3a ′, a large moat that derails the clip-side guide 10 and the clip-side guide 20 is not generated, and chain derailment prevention is prevented. From this point of view, it is not necessary to adopt the conventional weight increase of the chain 4 or the like, and the traveling performance of the chain 4 is not deteriorated.

  As shown in FIG. 3A, the driven roller 32 passes through the extended virtual horizontal plane 3a ′ of the sheet gripping space 3a of the clip 3 (preferably, the extended horizontal plane extends through the height position of the meshing portion of the sprocket 5). 3a 'passes through) at a height position. As a result, the chain 4 has a driving force transmitted from the sprocket 5 at a height position substantially the same as the tensile force F (F1 or F2) (see FIG. 6) of the sheet S generated in the clip 3 due to simultaneous biaxial stretching. Therefore, the bending moment that adversely affects the chain running is prevented from occurring on the chain virtual vertical plane.

  The clip patrol device 2 (2A, 2B) of the stretching device 1 of the present invention is configured so that the rail space J of the clip-side guide 10 that moves up and down for attachment and detachment can be inserted into and removed from the reference rail 30. Since the rail space K of the guide device 20 on the opposite side of the clip that moves up and down for attachment and detachment can be inserted into and removed from the pitch setting rail 31, one vertical shaft tool 6 and the other vertical shaft tool 7 are pulled. The part of the removed chain 4 can be easily and quickly inserted and removed from the reference rail 30 and the pitch setting rail 31 in the vertical direction, and the part of the chain 4 to be added can be easily and quickly attached to the reference rail 30 and the pitch setting rail 31. Therefore, it is possible to easily attach / detach the chain 4 to / from the rails 30 and 31 and increase / decrease the isometric links 8.

  The sprockets 5 are arranged on the front and rear sides (entrance / exit side) of the clip circulating devices 2A and 2B, respectively, so that the speed difference between the front and rear sprockets 5 and 5 can be set according to the draw ratio.

  The reference rail 30 and the pitch setting rail 31 are divided along the longitudinal direction and connected in an endless state, and the positions of the divided portions can be changed according to the extending conditions, and the distance G between them is adjusted. Thus, the pitch P between the adjacent clips 3 and 3 can be variably set. Each of the divided portions of the reference rail 30 and the pitch setting rail 31 may be configured by stacking a plurality of strip-shaped flexible plate materials so that they can be easily deformed.

DESCRIPTION OF SYMBOLS 1 ... Present drawing apparatus, 2 ... Clip circulating apparatus, 2A ... Left clip circulating apparatus, 2B ... Right clip circulating apparatus, 3 ... Clip, 3a ... Sheet holding space part, 3a '... Extension horizontal plane, 3b ... Female screw Part, 3c ... clip gripping part, 4 ... chain, 5 ... sprocket, 6 ... one vertical shaft tool, 6a ... shaft with head, 6b ... collar, 6c ... set ring, 7 ... other vertical shaft tool, 7a ... Bolt, 7b ... Lock nut, 8 ... Isometric link, 8A ... Outer link, 8B ... Inner link, 8Ba ... Flange part, 8Bb ... Web part, 8Bc ... Clip side space part, 8Bd ... Clip opposite space part, 10 ... Clip side guide 11, clip side vertical axis roller, 11 a, vertical axis, 11 b, roller main body, 11 b-1, roller guide surface, 11 b-2, vertical guide area, 11 c, destant 12, clip side vertical axis roller, 12 a, vertical axis, 12 b, roller main body, 12 b-1, roller guide surface, 12 b-2, vertical guide area, 12 c, destant collar, 13, clip side horizontal Shaft roller, 13a ... Horizontal shaft, 13b ... Roller body, 13b-1 ... Roller guide surface, 13c ... Destant collar, 13d ... Settling, 17 ... Clip side connector, 17a ... Bearing part, 17a-1 ... Landscape Recessed portion, 17a-2 ... mounting hole, 17b ... upper gripping portion, 17c ... lower gripping portion, 17d ... joint portion, 17e ... bolt, 17f ... bolt / nut, 17g ... bolt, 17h ... bolt, 17k ... female screw portion, 17 m ... Space part, 20 ... Clip opposite side guide, 21 ... Vertical axis roller on the opposite side of clip, 21a ... Vertical axis, 21b ... Roller body part, 21b-1 ... Low Guide surface, 21b-2: Up and down guide region, 21c: Destined collar, 21d ... Set ring, 22 ... Vertical axis roller on the opposite side of the clip, 22a ... Vertical shaft, 22b ... Roller body, 22b-1 ... Roller guide surface , 22b-2 ... vertical guide region, 22c ... destant collar, 23 ... horizontal axis roller on the opposite side of the clip, 23a ... horizontal axis, 23b ... roller body, 23b-1 ... roller guide surface, 23c ... destant collar, 23d ... Set ring, 23e ... Set pin, 27 ... Clip opposite connector, 27a ... Bearing part, 27a-1 ... Mounting hole, 27b ... Pin, 27c ... Extension part, 27c-1 ... Through hole, 27d ... Space part , 30: reference rail, 31: pitch setting rail, 32: driven roller, 33: flat washer, F (F1, F2): tensile force of sheet, G: separation distance, J: chestnut Rail for the upper side, K: space for the rail on the opposite side of the clip, MD: vertical direction, P: pitch, Q: circular path of the clip, R (R1, R2): clip side guide 10 is the reference rail 30 Reaction force received from the S, sheet, Sa, edge, TD, lateral direction, U (U1, U2, U3), reaction force received by the clip opposite side guide 20 from the pitch setting rail 31

Claims (2)

An endless chain consisting of a link of equal length links that are connected to each other in such a manner that they can be swung horizontally by alternately using one vertical shaft and the other vertical shaft, a sprocket that drives the endless chain, and one vertical shaft A clip connected to the tool and a clip side guide, a clip opposite guide connected to the other vertical shaft tool, a reference rail that guides the clip side guide to define a circular path of the clip, and a clip opposite A clip circulator equipped with a pitch setting rail that guides the side guide and has a pitch setting rail that variably sets the pitch between adjacent clips according to the separation distance from the reference rail is arranged on the left and right sides. In the simultaneous biaxial stretching apparatus for a sheet that holds and simultaneously stretches the longitudinal and lateral directions of the sheet,
The clip and clip side guide are attached to a clip side attachment that is connected to one vertical shaft so as to be horizontally swingable,
The clip side guide includes a vertical axis roller that sandwiches the reference rail from both sides, and a horizontal axis roller that abuts the upper end surface of the reference rail, and a sheet gripping space portion of the clip in the vertical guide area of the roller guide surface of the vertical axis roller Position an extended virtual horizontal plane of
As the reference rail moves up and down for attaching and detaching the clip side guide, the rail space surrounded by the roller guide surfaces of the vertical axis roller and the horizontal axis roller on both sides of the clip side guide can be inserted and removed in the vertical direction. Formed into
The guide device on the opposite side of the clip includes a vertical axis roller that sandwiches the pitch setting rail from both sides, and a horizontal axis roller that comes into contact with the upper end surface of the pitch setting rail, and extends above the vertical guide region of the roller guide surface of the vertical axis roller. Position the virtual horizontal plane,
As the pitch setting rail moves up and down for attachment and detachment of the guide device on the opposite side of the clip, the rail space surrounded by the roller guide surfaces of the vertical axis roller and the horizontal axis roller on both sides of the guide device on the opposite side of the clip is moved up and down. A simultaneous biaxial stretching apparatus for sheets, which is formed so that it can be inserted and removed.   The simultaneous biaxial stretching apparatus for a sheet according to claim 1, wherein a driven roller meshing with the sprocket is pivotally supported by a vertical shaft member, and an extended virtual horizontal plane of a sheet gripping space portion of the clip passes through a height position of the driven roller.

Images