JP2012121259A - Drawing machine for sheet-like material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drawing machine having a compact structure and enabling highly accurate drawing at high speed.SOLUTION: The drawing machine for a sheet-like material includes an endless link device in which a plurality of clamping devices for gripping ends of the sheet-like material are installed at both side ends of the sheet-like material. The sheet-like material is guided by guide rails arranged from an inlet side sprocket in a parallel state and a folding-fan state and is drawn, and after the drawing, the sheet-like material is detached, is made to pass through an outlet side sprocket and is returned to the inlet side sprocket. Link shaft holders guided by the respective guide rails are provided below link shafts for joint rotatably interconnecting link plates constituting a folding part of the link device. At a lower end of each link shaft holder on the sheet-like material side, two pairs of horizontal rollers rolled sandwiching both side faces of one guide rail are installed and the clamping devices are provided on the sheet-like material side. The two pairs of horizontal rollers are installed so that the horizontal rollers adjacent to each other are shifted vertically and opposing corners sandwiching the guide rails have the same height.

Description

  The present invention relates to a sheet-like material drawing machine for drawing a sheet-like material such as a thermoplastic resin film.

  A conventional example of a sheet-like material drawing machine is shown in Patent Document 1 (Japanese Patent Publication No. 2006-513069). Patent Document 1 shows a stretching apparatus for simultaneously stretching in the machine direction and the transverse direction using a continuous gripper for holding, transporting, and stretching the film. The gripper is supported and guided by rails and is driven forward by an endless chain that connects the grippers together, and the endless chain is driven by one or more sprockets.

  The stretching device includes an endless chain guided by two rails having a variable separation distance on both sides of a film to be stretched, and the endless chain is a continuous body of links connected to each other around a vertical pin. The gripper is connected to one of the two pins or provided between the two links, and is guided by the first rail of the two rails and protrudes to one side of the chain. In contrast, the guide piece is connected to one of the two pins between the grippers or provided between the two links. In addition, the guide pieces are angled with each other so that the distance between the two rails is changed or the distance between the continuous grippers on the other side is fixed or changed by changing the distance between the two rails. Thus, it moves along the second rail of the two rails.

  Preferably, the gripper has a body connected about one of the two vertical hinge pins of a continuous link of the chain, while the guide piece is a continuous chain of chains arranged between the previous hinge pins. The other vertical hinge pin of the link is connected around the center.

  A spacing piece is disposed between the two rails, whereby the link is configured to fix or change the distance between the clamps.

  When the distance between the two rails is shortened, the continuous links of the chain are arranged in a row and the maximum width is reached. It is configured to line up by pressing. In order to act so as to push the connection point with the link in this way, it is essential that each gripper body and each guide piece have a fixed posture with respect to the rail. This is because if the posture changes, it is impossible to accurately push the connection point with the link. For this reason, each gripper main body and each guide piece have two upper rollers and two lower rollers located on both sides of each rail, respectively, and the posture is fixedly maintained when guided along the rail. .

  Each gripper stretches the film in the longitudinal direction (TD direction) and the lateral direction (MD direction) by grasping both side edges of the film and moving along the rails. At this time, each gripper receives a reaction force in the direction opposite to the stretching direction, and the direction of the reaction force due to the stretching in the lateral direction is the entrance side of the film (opposite to the traveling direction of the film). The reaction force is supported by the rollers and rails provided in the gripper body. If the reaction force causes the gripper body to bend, the stretching accuracy of the film is adversely affected. That is, the gripping position of each gripper film changes due to the bending, so that there is a possibility that the horizontal stretch width as set may not be obtained, and it is preferable to reduce the bending of the gripper body as much as possible.

JP-T 2006-513069

  However, the stretching machine described in Patent Document 1 does not consider measures for bending of the gripper due to a reaction force during stretching of the film, and the stretching accuracy of the film may be affected by bending of the gripper body.

  Two rails are held by a support, and each gripper body and each guide piece are configured such that each rail is sandwiched by a number of rollers positioned above and below the support. The frame extends under the support, and a lower roller sandwiching the rail is provided at the tip of the frame, and bending of the frame portion is a problem due to a reaction force when the film is stretched.

  Furthermore, the vertical width of the rails is increased, the structure for engaging each gripper body and each guide piece with the rail is complicated, the size and weight of the moving part consisting of the gripper body and the guide piece are increased, and the apparatus is large. It is not suitable for high-speed movement.

  Further, since each gripper body and each guide piece are guided through a large number of pairs of rollers sandwiching both sides of each rail, the rollers may not be able to move smoothly when moving in contact with the rails. That is, since each gripper body and each guide piece are guided while being regulated to a fixed posture by a large number of pairs of rollers, each roller moves in a cramped state. This adversely affects smooth stretching and is not suitable for high-speed movement, and may affect productivity.

  Furthermore, since each gripper main body and each guide piece protrude between the rails and the link is connected between the protruding tips of both, the length of the link is reduced, and the MD direction (the film traveling direction) It is difficult to increase the stretching width.

  The present invention provides a stretching machine capable of performing high-precision stretching at a high speed with a compact configuration.

In order to solve the above-mentioned problems, the present invention is provided with an endless link device provided with a plurality of gripping devices at both ends of the sheet-like material for gripping the end of the sheet-like material, and the endless link device is formed in a folding shape. And is guided by a plurality of guide rails for guides which are driven by sprockets on the inlet side and the outlet side and are sent out from the sprockets on the inlet side and arranged in parallel in the direction of expansion in the traveling direction. In the sheet-like stretching machine configured to stretch the sheet-like material, remove the sheet-like material after stretching and return to the inlet-side sprocket via the outlet-side sprocket,
Each link shaft holder on the sheet-like object side is provided with a link shaft holder guided by the guide rails below a joint link shaft that rotatably connects a link plate constituting the folding unit of the equal length link device. Two pairs of horizontal rollers that roll on both sides of one guide rail are provided at the lower end of the guide rail, and the gripping device is provided on the sheet-like object side. And the diagonals which pinched | interposed the guide rail were provided so that it might become the same height.

  Further, in the sheet-like material stretching machine described above, of the two pairs of horizontal rollers, the lateral roller on the sheet-like material side of the guide roller and the inlet-side horizontal roller and the diagonal horizontal roller thereof are It is provided at a position close to the main body of the link shaft holder.

  Further, in the sheet-like material drawing machine described above, the two pairs of horizontal rollers of each link shaft holder of the endless link device provided on both sides of the sheet-like material are provided at symmetrical vertical positions across the sheet-like material. It is characterized by that.

  In the sheet-like material drawing machine described above, the two pairs of horizontal rollers are arranged vertically so that adjacent rollers overlap each other.

  Further, in the sheet-like material drawing machine described above, a pair of horizontal rollers that roll across both side surfaces of the other guide rail are provided at the lower end of each link shaft holder on the anti-sheet-like material side. Features.

  Further, in the sheet-like material drawing machine described above, two pairs of horizontal rollers that roll across both side surfaces of the other guide rail are provided at the lower end of each link shaft holder on the anti-sheet-like material side. Features.

  Further, in the sheet-like material drawing machine described above, the link shaft holder on the side opposite to the sheet-like material is arranged so that the joint link shaft is located almost directly above the other guide rail. Features.

  Further, in the sheet-like material drawing machine described above, the link shaft holder on the sheet-like material side is arranged so that the link shaft for joint is positioned almost directly above the one guide rail. To do.

  Further, in the sheet-like material drawing machine described above, the link shaft holder provided with the gripping device is in a state in which the posture of the gripping device is regulated by the plurality of pairs of horizontal rollers coming into contact with one guide rail. It is characterized by being guided along the guide rail.

  Further, in the sheet-like material drawing machine described above, the gripping device is guided while maintaining a substantially perpendicular posture with respect to one guide rail.

  In the sheet-like material drawing machine described above, the link shaft holder on the side opposite to the sheet-like material is guided by a pair of horizontal rollers so that the posture thereof can be changed with respect to the guide rail.

  According to the present invention, highly accurate stretching can be performed at high speed with a compact configuration, and productivity can be improved.

It is a top view of the extending machine of an example of the present invention. It is sectional drawing of the isometric link apparatus of the extending | stretching machine of FIG. It is a top view in the state where the isometric link of the embodiment of the present invention was closed. It is a figure which shows the positional relationship of the link shaft holder seen from the arrow E of FIG. It is a partial cross section figure of the link shaft holder seen from the arrow A of FIG. FIG. 3 is a partial cross-sectional view of a link shaft holder as viewed from an arrow B in FIG. 2. It is a partial cross section figure of the link shaft holder seen from the arrow C of FIG. It is a perspective view of the back surface of the link shaft holder by the side of the sheet-like material of this invention Example. It is a perspective view of the back surface of the link shaft holder on the side opposite to the sheet-like object. It is a perspective view which similarly shows the engagement relationship of the horizontal roller and guide rail of the back surface of the link shaft holder by the side of a sheet-like object. It is a top view of the state which opened the isometric link similarly.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. First, a simultaneous biaxial stretching machine that is a basic form of the present invention will be described with reference to FIGS. 1 and 2.

  FIG. 1 is a plan view of a simultaneous biaxial stretching machine according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view of the isometric link device 31, and its configuration and operation are as follows.

  An endless link device 3 having a plurality of (many) gripping devices 2 for gripping the end of the sheet-like material 1 on both sides of the sheet-like material 1 (part of the link in the figure and the endless link of the upper half of the sheet-like material are (Omitted) is composed of a plurality of (multiple) isometric link devices 31 formed in a fold shape. Further, the endless link device 3 is driven by the inlet side sprocket 4 of the sheet-like object 1. Then, the gripping device 2 is opened and closed by an opening / closing means (not shown) such as an opening / closing guide provided at the entrance to grip the sheet-like material 1 and heated to a temperature required for stretching in a preheating section (not shown). .

  Furthermore, the endless link device 3 is guided in the extending section by two guide guide rails 5 and 6 arranged in parallel in a diverging shape in the traveling direction X, in the TD direction (vertical direction of the diverging portion). The sheet 1 is simultaneously stretched in two vertical and horizontal directions (vertical: TD direction, horizontal: MD direction) by stretching and gradually expanding from the grip pitch P1 to P2 in the MD direction (lateral traveling direction). . Then, heat-fixed at a predetermined temperature in the heat treatment section, rapidly cooled in the cooling section, open and close means (not shown) such as an opening and closing guide provided at the outlet to open and close the grasping device 2 to remove the sheet 1 The removed sheet-like object 1 is allowed to proceed as it is. Further, the endless link device 3 is configured to be driven by the outlet side sprocket 7 and return to the inlet side sprocket 4.

  That is, the sheet-like material drawing machine is provided with an endless link device 3 provided with a plurality of gripping devices 2 for holding the end portions of the thermoplastic resin sheet-like material 1 at both ends of the sheet-like material 1. The apparatus 3 includes a plurality of isometric link devices 31 formed in a fold shape, and is driven by an inlet-side sprocket 4 of the sheet-like object 1 and is arranged in a divergent shape in the traveling direction X, After the sheet-like object 1 is stretched by being guided by 6, the sheet-like object 1 is removed, and is driven by the outlet-side sprocket 7 to return to the inlet-side sprocket 4.

  As described above, each gripping device 2 stretches the film in the longitudinal direction (TD direction) and the lateral direction (MD direction) by grasping both side ends of the sheet-like object 1 and moving in the traveling direction A along the rail. To do. A reaction force due to stretching in the MD direction is applied to each gripping device 2, and the direction of the reaction force is the direction of the sprocket 4 on the entrance side of the sheet-like object 1 opposite to the stretching direction X (the film traveling direction). And opposite direction) Y. Although not shown in the drawing, the reaction force due to the stretching in the MD direction is also applied in the arrow Y direction in the same way for the gripping device 2 for the endless link in the upper half of the sheet-like material 1.

  As shown in FIG. 2, the guide rail for guide is formed in a rectangular shape with a convex member, and is parallel to one guide rail 5 on the sheet-like object side and the other guide rail 6 on the anti-sheet-like object side. It is a pair. A joint link shaft 8 to which the gripping device 2 is connected is arranged almost directly above the center of the sheet-like object side guide rail 5, and almost directly above the center of the other anti-sheet-like object side guide rail 6. A joint link shaft 9 having no gripping device 2 is arranged. The link shaft 8 and the link shaft 9 are link shafts for jointing the link plates 15 and 16 rotatably.

  The main bodies of the link shaft holders 10 and 11 are attached to the lowermost ends of the link shafts 8 and 9 so as to straddle the guide guide rails 5 and 6, respectively. A pair of lateral rollers (radial bearings) 12 (12a to 12d) and 13 are respectively attached to the lower sides of the link shaft holders 10 and 11 so as to be rotatable about the vertical axis. The horizontal rollers 12 and 13 are arranged so as to roll across both side surfaces of the guide guide rails 5 and 6 that restrict the movement of the isometric link device 31. The horizontal rollers 12 and 13 have a cylindrical shape, and change (rotate) while being in contact with both side surfaces of the guide rails 5 and 6 substantially vertically at all times. As a result, the link shafts 8 and 9 are moved at high speed, and the isometric link device 31 is guided by the guide rails and can travel at high speed.

  Two vertical rollers 12g that roll and run in contact with the upper surface 5a of the guide rail 5 are mounted in the center below the link shaft holder 10. FIG. 8 is a perspective view of the back surface of the link shaft holder on the sheet-like object side, and it can be seen that a vertical roller 12g is built in the center of each pair of horizontal rollers (12a to 12d). Two vertical rollers 13 a that roll and run in contact with the upper surface 6 a of the guide rail 6 are mounted and attached to the central portion below the link shaft holder 11. FIG. 9 is a perspective view of the back surface of the link shaft holder on the side opposite to the sheet-like object, and it can be seen that the vertical roller 13 a is built in the center of the pair of horizontal rollers 13.

  The vertical rollers 12 g and 13 a receive the load of the isometric link device 31 and transmit it to the upper surfaces 5 a and 6 a of the guide rails 5 and 6. The vertical rollers 12g and 13a rotate around the horizontal axis, and each of the two rollers contacts the upper surface of each guide rail so that it does not tilt, and the isometric link device 31 can be driven stably.

  Among the link shaft holders, the link shaft holder 10 close to the sheet-like object 1 has a side portion that faces the sheet-like object protruding sideways (substantially vertically protruding) to form a mounting portion 17 of the gripping device 2. ing. The gripping device 2 is attached to the attachment portion 17.

  FIG. 3 is a plan view showing a state where the isometric links are closed, and FIG. 4 is a plan view showing a positional relationship between the link shaft holders 10 and 11 as viewed from an arrow E in FIG. The link shaft holder 10 shown in FIG. 2 has two pairs of horizontal rollers: a pair of horizontal rollers 12a and 12d that sandwich the guide rail 5, and a pair of horizontal rollers 12b and 12c that sandwich the guide rail 5. . A large number of the link shaft holders 10 having the above configuration are arranged along the guide rails 5 for guide. On the other hand, the link shaft holder 11 has a pair of horizontal rollers 13 sandwiching the guide rail 6, and a large number of the link shaft holders 11 are arranged along the guide guide rail 6.

  Since the two link shaft holders 10 are in contact with the two side surfaces of the guide rail 5 by two pairs of horizontal rollers 12a to 12d (four), the posture of the link shaft holder 10 is regulated by the guide rail 5. Therefore, the posture of the gripping device 2 attached to the link shaft holder 10 is also restricted, and either the link plate 15 or 16 is closed as shown in FIG. 3 or the link plate 15 or 16 is opened as shown in FIG. In this case, the posture of protruding toward the sheet-like object 1 in the direction substantially perpendicular to the guide rail 5 (vertical direction) is always maintained.

  On the other hand, when the link shaft holder 11 is brought into contact with each side surface of the guide rail 6 by one pair of lateral rollers 13 and 13 (one-point contact), the posture of the link shaft holder 11 is made by the guide rail 6 compared to the link shaft holder 10. Is not restricted and can be rotated around the link shaft 9 within the range of mechanical play, so that a smooth operation is performed when moving along the guide rail 6. Two pairs of the lateral rollers 13 may be provided at the lower end of the link shaft holder 11.

  3 and 4, when the upper side of the drawing is the sheet entrance side, the reaction force to the gripping device 2 due to the stretching described in FIG. 1 is applied to the attachment portion 17 in the arrow Y direction. Due to the reaction force in the Y direction, a rotational force in the arrow Z direction (counterclockwise direction) is applied to the link shaft holder 10 and is also applied to the horizontal rollers 12a to 12d. When the contact state of the horizontal rollers 12a to 12d with the guide rail 5 due to this rotational force is seen, the horizontal rollers 12b and 12d are in strong contact with the guide rail 5, and the horizontal rollers 12a and 12c are separated from the guide rail 5. To do. Accordingly, the reaction force is mainly supported by the horizontal rollers 12b and 12d.

  5 is a partial cross-sectional view of the link shaft holder 10 as viewed from the arrow A in FIG. 2, FIG. 6 is a partial cross-sectional view of the link shaft holder 10 as viewed from the arrow B in FIG. FIG. 10 is a perspective view showing the engagement relationship between the lateral roller on the back surface of the link shaft holder 10 and the guide rail 5. The horizontal rollers 12b and 12d are provided below both sides of the link shaft holder 10 so as to sandwich the upper part of the guide rail 5, and the horizontal rollers 12a and 12c are provided at the lower ends of the link shaft holder 10 so as to sandwich the lower part of the guide rail 5. It is provided at the tip of the support shaft 12e protruding from the front.

  In the present embodiment, as described above, the horizontal rollers 12a to 12d are shifted up and down below both sides of the link shaft holder 10, and the diagonal horizontal rollers 12b and 12d are positioned close to the main body of the link shaft holder 10. The diagonal horizontal rollers 12a and 12c are provided at positions lower than the main body of the link shaft holder 10, respectively. The diagonal rollers 12a and 12c are provided at the tip of the support shaft 12e protruding from the lower end of the link shaft holder 10 so as to be positioned downward, and the distance from the gripping device 2 to the horizontal rollers 12a or 12c is increased. The length is increased by the length of the support shaft 12e, and the bending at this portion is increased.

  Compared to this, the diagonal rollers 12b and 12d are provided at the lower end of the link shaft holder 10 via a short support shaft 12f, so that the positions of the horizontal rollers 12b and 12d that support the reaction force to the gripping device 2 are provided. The distance is shortened, and the bending due to the reaction force during this period can be reduced. Therefore, by suppressing the bending to a small extent, it is possible to suppress a change in the position where the sheet-like object 1 of the grasping device 2 grasps, and to perform highly accurate stretching.

  Here, the lateral roller on the sheet side of the guide roller 5 on the entrance side is 12b, and the diagonal lateral roller is 12d.

  The reaction force is also applied to the endless link gripping device 2 in the upper half of the sheet-like object 1 (not shown in FIG. 1). The horizontal roller on the sheet-like object side and on the inlet side, and the horizontal roller at the diagonal position thereof are provided so as to be positioned upward. Accordingly, the two pairs of horizontal rollers of each link shaft holder of the endless link device provided on both sides of the sheet-like object 1 are provided at symmetrical vertical positions with the sheet-like object 1 in between (centered).

  The link shaft holder 10 requires a large installation space in the direction along the guide rail 5 as compared with the pair of horizontal rollers, because the two pairs of horizontal rollers 12a to 12d are arranged side by side. To do. In the present embodiment, the horizontal rollers 12a and 12b adjacent to the link shaft holder 10 are shifted up and down and provided in an overlapping manner, so that the installation space along the guide rail 5 is suppressed. The same applies to the horizontal roller 12c12d. That is, since the support shaft 12e protrudes more than the thickness of the horizontal rollers 12b and 12d, both the horizontal rollers 12a and 12b and 12c and 12d can be arranged in the horizontal direction without contacting each other. Therefore, the installation space of the horizontal rollers 12a and 12b along the guide rail 5 is suppressed by this overlap.

  Further, as shown in FIGS. 5 and 6, when a large number of link shaft holders 10 having the above configuration are arranged side by side along the guide rail 5, the lateral rollers 12a and 12b and 12c and 12d of the adjacent link shaft holders 10 are respectively connected. Adjacent to each other, the adjacent horizontal rollers are separated in the vertical direction and do not come into contact with each other. Therefore, they can be arranged in the horizontal direction, and the pitch of the adjacent link shaft holders 10 can be reduced by this overlap. it can.

  As shown in FIGS. 4, 7, and 9, the link shaft holder 11 is disposed symmetrically with a pair of horizontal rollers 13 across the guide rail 6, and the guide rail 6 has the same position (position of the same height). It is comprised so that it may drive | work in the stable state on both sides.

  As described above, by reducing the installation space and pitch of each horizontal roller of the link shaft holder 10, the link shaft holders 10 and 11 have the same pitch when arranged in a large number on the guide rail. It is configured.

  The link shafts 8 and 9 for the joints of the link shaft holders 10 and 11 are arranged so as to be located almost directly above the centers of the guide rails 5 and 6, respectively, as shown in FIG. By configuring in this way, the length of the link (link plate) is reduced compared to the structure in which the gripper main body and the guide piece of Patent Document 1 protrude between the rails and the link is connected between the protruding tips. The distance between 5 and 6 can be increased. Therefore, the stretching length in the MD direction (the film traveling direction) and the stretching ratio from the closed state of the isometric link shown in FIG. 3 to the open state of the isometric link shown in FIG. 11 can be increased. . In other words, since the distance between the guide rails can be reduced to achieve the same stretch length and stretch ratio, the stretcher can be downsized.

  The traveling operation of the isometric link device 31 guided by the guide rail in the above configuration will be described.

  In the place of the entrance side sprocket 4, the isometric link of FIG. 3 is in a closed state, and the ends of the sheet-like material 1 are spaced at intervals of the pitch P 1 by the gripping devices 2 protruding substantially vertically from the guide rail 5. grab. When the isometric link device 31 is driven by the inlet sprocket 4 of the sheet-like material, the horizontal rollers of the link shaft holders move while rotating in contact with the guide rails 5 and 6, respectively.

  When the horizontal rollers 12 (12a to 12d) and 13 reach the guide rails 5 and 6 arranged in a divergent state, the distance between the two guide rails 5 and 6 is gradually reduced and the isometric link is gradually closed. Open up. As shown in FIG. 11, the interval between the adjacent link shaft holders 10 and the link shaft holders 11 are increased, and the interval between the gripping devices 2 is also increased. In the region where the distance between the link shaft holders is widened, the guide rail 5 is in the end widening state in FIG.

  The link shaft holder 10 is guided while the posture thereof is regulated by the guide rail 5, and the gripping device 2 extends the sheet-like object in a posture state protruding in the vertical direction from the guide rail 5. As described above, the gripping device 2 performs the stretching operation while maintaining the posture of gripping the sheet-like object at the position of the inlet-side sprocket 4 with respect to the guide rail, and the gripping part of the sheet-like object rotates. The sheet 1 is not torn without being twisted.

  Further, each gripping device 2 receives a reaction force in the direction of arrow Y accompanying stretching, and since this reaction force is received by the horizontal rollers 12b and 12c whose distance is the shortest from the gripping device 2, the gripping device 2 and the horizontal roller The bending between them can be reduced, and the gripping position does not change, and highly accurate stretching can be performed.

  Since the link shaft holder 11 has a pair of horizontal rollers 13, one horizontal roller contacts each side surface of the guide rail 6 (one-point contact) and rotates. Since there is play between the horizontal roller 13 and the guide rail 6, the posture can be slightly changed by the mutual force relationship when rotating along the guide rail 6. As described above, the posture of the link shaft holder 10 is regulated by the plurality of pairs of horizontal rollers 12 a to 12 d, but is relaxed by the play of the link shaft holder 11. Therefore, the link shaft holder 10 can move smoothly along the guide rail 5 while the cramped state is relaxed.

  As described above, according to the present embodiment, it is possible to reduce the bending between the gripping device 2 and the lateral roller, and it is possible to perform highly accurate stretching without changing the gripping position.

  Further, in order to maintain a constant posture, the link shaft holder 10 is provided with a plurality of pairs of horizontal rollers, but the horizontal rollers are arranged so as to be vertically shifted so that adjacent rollers overlap each other. It is possible to reduce the pitch of the adjacent gripping devices 2 while keeping it small. By reducing the pitch of the gripping device 2, the sheet-like material can be grasped at a small pitch, and the quality of the sheet-like material drawn by high-precision stretching can be maintained high during stretching.

  Furthermore, the link shafts for joints are arranged so as to be located almost directly above the center of the corresponding guide rails, so the link plate can be set long up to the installation interval of the guide rails, so that the small extension Even in a device (a device having a narrow guide rail interval), the stretch length and stretch ratio can be set large.

  DESCRIPTION OF SYMBOLS 1 ... Sheet-like object, 2 ... Grasp device, 3 ... Endless link device, 4 ... Inlet side sprocket, 5 ... One guide rail, 6 ... Other guide rail, 7 ... Outlet side sprocket, 8, 9 ... Link shaft, DESCRIPTION OF SYMBOLS 10, 11 ... Link shaft holder, 12, 12a-12d ... Two pairs of horizontal rollers, 12a, 12c ... Diagonal horizontal rollers, 12b, 12d ... Diagonal horizontal rollers, 13 ... Horizontal rollers, 13 ... 1 Pair of transverse rollers, 15, 16 ... link plate, 17 ... gripping device mounting portion, 31 ... isometric link device.

Claims (11)

An endless link device provided with a plurality of gripping devices for gripping the end of the sheet-like material on both side ends of the sheet-like material is provided, and this endless link device is composed of a plurality of equal-length link devices formed in a fold shape. It is driven by an inlet-side or outlet-side sprocket, and is extended from the inlet-side sprocket and guided by a plurality of guide guide rails arranged in parallel in a diverging state in the traveling direction to stretch and stretch the sheet-like material In the sheet-like stretching machine configured to remove the sheet-like material later and return to the inlet-side sprocket via the outlet-side sprocket,
Each link shaft holder on the sheet-like object side is provided with a link shaft holder guided by the guide rails below a joint link shaft that rotatably connects a link plate constituting the folding unit of the equal length link device. Two pairs of horizontal rollers that roll on both sides of one guide rail are provided at the lower end of the guide rail, and the gripping device is provided on the sheet-like object side. And a sheet-like material drawing machine characterized in that the diagonals sandwiching the guide rails are provided at the same height.   2. The sheet-like material drawing machine according to claim 1, wherein, of the two pairs of transverse rollers, the entrance-side transverse roller and the diagonal transverse roller thereof are arranged on the link shaft holder. A sheet-like material drawing machine characterized by being provided at a position close to the main body.   3. The sheet-like material drawing machine according to claim 2, wherein the two pairs of horizontal rollers of each link shaft holder of the endless link device provided on both sides of the sheet-like material are provided at symmetrical vertical positions across the sheet-like material. A sheet-like material drawing machine characterized by that.   The sheet-like material drawing machine according to any one of claims 1 to 3, wherein the two pairs of horizontal rollers are arranged vertically so that adjacent rollers overlap each other. Machine.   5. A pair of horizontal rollers that rolls with the lower end of each link shaft holder on the side opposite to the sheet-like material sandwiching both side surfaces of the other guide rail in the sheet-like material drawing machine according to claim 1. A sheet-like material drawing machine characterized by comprising:   5. The sheet-like material drawing machine according to claim 1, wherein the pair of horizontal rollers roll while sandwiching both side surfaces of the other guide rail at the lower end of each link shaft holder on the side opposite to the sheet-like material. A sheet-like material drawing machine characterized by comprising:   In the sheet-like material drawing machine according to any one of claims 1 to 6, the link shaft holder on the side opposite to the sheet-like material is such that the joint link shaft is located almost directly above the other guide rail. A sheet-like material drawing machine characterized by being arranged.   The sheet-like material drawing machine according to any one of claims 1 to 7, wherein the link shaft holder on the sheet-like material side is disposed so that the link shaft for joint is positioned almost directly above the one guide rail. A sheet-like stretching machine characterized by the above.   9. The sheet-like material stretching machine according to claim 1, wherein the link shaft holder provided with the gripping device is configured such that the plurality of pairs of lateral rollers come into contact with one guide rail so that the posture of the gripping device is increased. The sheet-like material drawing machine is characterized in that it is guided along a guide rail in a state where the pressure is regulated.   10. The sheet-like material drawing machine according to claim 9, wherein the gripping device is guided while being maintained at a substantially right angle with respect to one of the guide rails.   11. The sheet-like material drawing machine according to claim 1, wherein the link shaft holder on the side opposite to the sheet-like material is guided by a pair of lateral rollers so that the posture thereof can be changed with respect to the guide rail. A sheet-like material drawing machine.

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