JP2011230292A - Drawing machine for sheet-like material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drawing machine for a sheet-like material which is small in running resistance, maintains running stability, and prevents the floating of a link device.SOLUTION: In the drawing machine for the sheet-like material in which the endless link device having a plurality of gripping devices gripping the ends of the sheet-shaped material on both side ends of the sheet-like material is installed and which is driven by inlet side and outlet side sprockets, is guided by guide rails for guidance which are sent from the inlet side and arranged in a parallel state and a spreading state, and stretches the sheet-like material, a link shaft holder which contacts the guide rails and moves is installed below each link shaft for a joint of two spots of a link plate constituting the folding scale part of the link device, the gripping devices are fixed to the end of the link plate on one link shaft side, and a roller with a brim is installed rotatably at the upper end which penetrated the link plate in the other link shaft.

Description

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

  As shown in Patent Document 1 (Japanese Patent Application Laid-Open No. 2005-246156), a sheet-like material drawing machine is an endless link device composed of a plurality of isometric link devices formed in a fold shape along a guide rail for guides. Is a pair of radial bearings attached to the lower ends of the two link shafts for connecting the link plates constituting the folding part of the isometric link device. The (roller) is disposed so as to roll on both side surfaces of the two guide rails for guiding that restrict the movement of the link device.

  The guide guide rail is arranged in a parallel state and a diverging state in the traveling direction, and a grip device for holding an end portion of the sheet-like material is fixed to one link shaft side end of each link plate. When the isometric link device travels while being guided, the sheet-like material is simultaneously stretched in the MD direction and the TD direction by the respective gripping devices. During the stretching, a reaction force in the direction opposite to the TD direction is applied to the gripping device, particularly by stretching in the TD direction. This reaction force is applied to the link plate as a moment with the lower side of one link shaft on the side where the gripping device is fixed as a fulcrum, and a lifting force acts on the other side of the link plate, resulting in unstable traveling operation. There is a risk of becoming.

  In Patent Document 1 above, measures for preventing the link plate from being lifted are not considered, but in order to prevent the link device from being lifted, a slide plate or a roller-like lift preventing member is provided on the upper surface of the link plate. Measures such as bringing the guide guide into contact with the lifting prevention member from above are conceivable. The roller-like lifting prevention member supports the roller on a horizontal shaft provided on the link plate, and the angle of the roller shaft changes depending on the opening / closing angle of the link plate.

JP-A-2005-246958

  However, the slide plate lift prevention member has a large sliding resistance during traveling of the isometric link device, and the roller-like lift prevention member changes the angle of the roller shaft together with the opening / closing angle of the link plate. Since the direction of the roller changes, abnormal noise and traveling pulsation are likely to occur depending on the contact angle with the guide guide that regulates the lifting, and there is a problem in followability.

  SUMMARY OF THE INVENTION In view of the above-mentioned drawbacks of the prior art, the present invention provides a sheet-like stretching machine that has low running resistance and maintains running stability and prevents the link device from lifting.

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 for gripping end portions of the sheet-like material on both side ends of the sheet-like material, and the endless link device is formed in a folding shape. A plurality of isometric link devices driven by sprockets on the inlet side and outlet side, guided by guide rails that are fed out from the inlet side sprocket and arranged in a parallel state and a divergent state in the traveling direction. In a sheet-like stretching machine configured to stretch a sheet-like material, remove the sheet-like material after stretching, and return to the inlet-side sprocket via the outlet-side sprocket,
A link shaft holder that moves in contact with the guide rail is provided below each of the two link shafts of the link plate that constitutes the folding portion of the equal-length link device, and the link plate on one link shaft side is provided. The gripping device is fixed to the end, and a hooked roller is rotatably provided on the other link shaft at the upper part that penetrates the link plate.

  In the sheet-like material drawing machine described above, a retaining member is fitted to the upper end of the other link shaft that has penetrated the flanged roller.

  In the sheet-like material drawing machine described above, the flanged roller is arranged so that the flange portion is positioned on the link plate side.

  In the sheet-like material drawing machine described above, the flanged roller is driven by being fitted to each sprocket.

  According to the present invention, when traveling along the guide rail for guide, stable traveling can be maintained with a small traveling resistance, and the apparatus can be prevented from rising.

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 the elements on larger scale which show the upper part of the link axis | shaft of FIG. 2 in a partial cross section. It is sectional drawing of the link shaft holder below the link shaft of FIG. It is a top view of the state where the equal length link of the extending machine of the present invention example was closed. It is a top view of the state which opened the isometric link of the extending | stretching machine of this invention Example.

  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 that is an embodiment of the present invention, and FIG. 2 is a cross-sectional view of an isometric link device 31 that is an embodiment, 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 (a part of the links and the endless links on one side in the figure are omitted) is folded. It is composed of a plurality (multiple) of equal-length link devices 31 formed in a scale shape. Furthermore, the endless link device 3 is driven by an inlet-side sprocket 4 of a sheet-like material. 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 by guide rails 5 and 6 arranged in a divergent shape in the traveling direction in the extending section, and gradually expands from the gripping pitch P1 to P2, so that the sheet-like object 1 is expanded. Opening / closing means (not shown) such as an open / close guide provided at the outlet, which is stretched simultaneously in two longitudinal and transverse directions (MD direction and TD direction), then heat-set at a predetermined temperature in the heat treatment section, and rapidly cooled in the cooling section. Thus, the gripping device 2 is opened and closed to remove the sheet-like material 1, and the removed sheet-like material 1 proceeds 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 according to the present invention is provided with an endless link device 3 provided with a large number 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 endless link device 3 is composed of a plurality of equal-length link devices 31 formed in a fold shape, and is driven by a sheet-like material entrance-side sprocket 4 and is arranged so as to spread outwardly in the traveling direction. After the sheet-like object 1 is extended by being guided by 5 and 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. The chain links 25 a and 25 b that limit the maximum pitch of the equal length link device 31 in the endless link device 3 are provided between the adjacent link shafts 9.

  As shown in FIG. 2, the guide rails 5 and 6 for guide are formed in a pair of a sheet-like object side and an anti-sheet-like object side with a convex cross section formed in a rectangular shape. One joint link shaft 8 connected to a gripping device 2 for gripping the sheet-like material 1 is arranged on the sheet-like material side guide rail 5, and the other anti-sheet side guide rail 6 has the gripping device 2. The other non-joint link shaft 9 is arranged. The link shaft 8 and the link shaft 9 are link shafts that pass through the link plates 15 and 16 and are jointed rotatably.

  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, and a pair of horizontal rollers (radial bearings) are respectively provided below both sides of the link shaft holders 10 and 11. ) 12, 13 are rotatably mounted. 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.

  5 and 6 are plan views of the isometric link in a closed state and an open state, respectively. The transverse rollers 12 and 13 attached to the link shaft holders 10 and 11 change so as to be positioned substantially perpendicular to both side surfaces of the guide rails 5 and 6 at all times due to their action (rotation). (Turns). Accordingly, the link shafts 8 and 9 move at high speed along the both side surfaces of the guide guide rails 5 and 6 by the action (rotation) of the lateral rollers 12 and 13, so that the isometric link device 31 is guided. This makes it possible to travel at high speed.

  The other joint link shaft 9 not having the gripping device 2 and the detailed structure above and below it will be described with reference to FIGS.

  In FIG. 3, the link shaft 9 penetrates through the link plates 15 and 16 as described above so as to be rotatable, and a roller 17 with a hook on the upper part of the link plate 15 is rotatable via a roller bearing 17a. Is provided. The flanged roller 17 is provided so that the flange portion 17b is positioned on the link plate 16 side. The link shaft 9 penetrates the flanged roller 17 and protrudes slightly at its upper end. An E-ring for retaining the flanged roller 17 or a C-shaped retaining ring retaining member 18 is fitted to the projected upper end. ing. Due to the above-described configuration of retaining roller 17 with hooks, the upper surface of link plate 16 is effectively prevented from rising upward by hooks 17b having a large area of roller 17.

  As shown in FIG. 1, when the flanged roller 17 passes through the inlet and the outlet, the upper outer periphery of the flange 17b is fitted between the teeth of the sprockets 6 and 8 as shown in FIG. Driven, the endless link device 3 travels. When the endless link device 3 is driven, the flanged roller 17 is rotatable with respect to the link shaft 9, so that it does not slide between the teeth of the sprockets 6 and 8, and the driving resistance (running resistance) is greatly reduced. it can.

  In FIG. 4, the link shaft holder 11 fixed to the lower end of the link shaft 9 is composed of a central portion 11a and both side portions 11b that are stepped. A roller shaft 13a projects from both side portions 11b so as to extend downward, and the horizontal roller 13 is supported on the roller shaft 13a via a roller bearing. As described above, the lateral roller 13 is disposed so as to be able to rotate while being in contact with both side surfaces 6b of the guide rail 6 for guide. Reference numeral 6 c denotes a mounting bolt for the guide rail 6 for guide.

  A storage hole that opens downward is formed in the central portion 11a of the link shaft holder 11, and a pair of vertical rollers 14 that are rotatably mounted therein are housed therein. There may be one vertical roller instead of a pair. As shown in FIG. 3, the pair of vertical rollers 14 are attached so as to be able to rotate independently, and are disposed so as to abut on positions separated in the width direction of the upper surface 6 a of the guide rail 6 for guide. Therefore, when the equal length link device 31 travels while being guided by the guide guide rail, the vertical roller 14 rotates and moves on the upper surface 6a of the guide guide rail 6 while receiving the vertical load of the equal length link device 31. To do.

  At this time, since the pair of rollers can receive the vertical load of each equal-length link device 31 horizontally at two locations, a large number of equal-length link devices 31 arranged side by side in the length direction of the guide guide 6 are It is kept horizontal without being twisted, and the sheet-like material can be maintained in high quality without undulating up and down during stretching.

  Using a flanged roller (corresponding to a flanged radial bearing in Patent Document 1) as the lateral roller 13, the side surface and the flange portion of the flanged roller are brought into contact with both side surfaces 6b and the upper surface 6a of the guide rail 6, respectively. If configured to do so, the vertical roller 14 becomes unnecessary. That is, the flange portion of the flanged roller abuts against the upper surface 6a of the guide rail 6 and can travel under the vertical load of each equal-length link device 31, and is arranged side by side in the length direction of the guide rail 6 for guide. A large number of the equal-length link devices 31 are kept horizontal without being twisted, and the sheet-like material can be maintained in high quality without undulating up and down during stretching.

  3 and 4, the detailed structure of the link shaft 9 and the link shaft holder 11 provided below the link shaft 9 has been described. However, the description of the link shaft 8 and the link shaft holder 10 provided therebelow is omitted because it has the same configuration. .

  The traveling operation of the isometric link device 31 guided by the guide rail in the above configuration will be described. When the isometric link device 31 is driven by the sprocket 4 on the sheet-like side, the horizontal roller 13 and the vertical roller 14 of the link shaft holder 11 come into contact with the side surface 6b and the upper surface 6a of the guide rail 6 for guide, respectively. And move while rotating. The vertical roller 14 moves while receiving the vertical load of the equal length link device 31 at two places on the upper surface 6a, and the horizontal roller 13 moves the equal length link device 31 along the guide shape in the traveling direction of the guide rails 5 and 6. Guiding the driving.

  By traveling on the parallel part and the divergent part of the guide rail, the gripping device 2 fixed to one link shaft end of each link plate grips the sheet-like material at the entrance and MD direction and TD. Stretch simultaneously in two directions. When the sheet-like material is stretched, a reaction force in the direction opposite to the TD direction is applied to the gripping device 2 particularly by stretching in the TD direction. This reaction force is applied to the link plates 15 and 16 as a moment with the lower side of one link shaft 8 on the side on which the gripping device 2 is fixed as a fulcrum, and the link shaft 9 on the other side of the link plates 15 and 16. In the vicinity, lift force acts.

  In this embodiment, as described above, the large portion 17b of the roller 17 is disposed on the upper surface of the link plate 16, and the roller 17 is prevented from coming off by the retaining member 18 fitted to the upper end of the link shaft 9. Therefore, the upward lift is effectively prevented.

  In addition, the hooked roller 17 is driven by being fitted between the teeth of the sprockets 6 and 8 at the entrance and exit when passing through the inlet and the outlet, and the isometric link device 31 travels. Since 17 is freely rotatable between the link shaft 9, it does not slide between the teeth of the sprockets 6, 8 and the driving resistance (running resistance) can be greatly reduced.

DESCRIPTION OF SYMBOLS 1 ... Sheet-like object, 2 ... Grab device, 3 ... Endless link device, 4 ... Entrance side sprocket, 5,
6 ... Guide guide rail, 5a ... Upper surface of guide guide rail, 5b ... Both sides of guide guide rail, 7 ... Exit side sprocket, 8,9 ... Link shaft for joint, 10, 11 ... Link shaft holder, 12 , 13 ... Horizontal roller, 12a, 13a ... Roller shaft, 14 ... Vertical roller, 15, 16 ... Link plate, 17 ... Roller roller, 17a ... Roller bearing, 17b ... Gutter, 18 ... Retaining member, 31 ... etc. Long link device.

Claims (4)

An endless link device provided with a plurality of gripping devices for gripping the end of the sheet-like material at both ends of the sheet-like material is provided, and the endless link device comprises a plurality of equal-length link devices formed in a fold shape. It is driven by sprockets on the inlet side and outlet side, and is fed from the inlet side sprocket and guided by guide guide rails arranged in a parallel state and a divergent state in the traveling direction to stretch the sheet-like material, and after stretching In a sheet-like material drawing machine configured to remove the object and return to the inlet-side sprocket via the outlet-side sprocket,
A link shaft holder that moves in contact with the guide rail is provided below each of the two link shafts of the link plate that constitutes the folding portion of the equal-length link device, and the link plate on one link shaft side is provided. An apparatus for stretching a sheet-like material, wherein the gripping device is fixed to an end, and a hooked roller is rotatably provided on an upper portion of the other link shaft penetrating the link plate.   2. The sheet-like material drawing machine according to claim 1, further comprising a retaining member fitted to an upper end of the other link shaft that has penetrated the flanged roller. .   3. The sheet-like material drawing machine according to claim 1 or 2, wherein the flanged roller is disposed so that the collar portion is positioned on the link plate side.   4. The sheet-like material drawing machine according to claim 1, wherein the flanged roller is driven by being fitted to each of the sprockets.

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