Sheet-like object spreader

A sheet and stretching machine technology, which is applied in the direction of winding strips, thin material handling, transportation and packaging, etc., to achieve the effect of simple structure and reduced walking resistance

Active Publication Date: 2005-06-22
JAPAN STEEL WORKS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the rotation axis of the guide roller (rolling bearing) rolling under its own weight is fixed in one directio

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example

[0034] The first embodiment

[0035] Attached below Figure 1-Figure 4 The first embodiment of the present invention will be described.

[0036] figure 1 It is a plan view of the synchronous biaxial stretching machine as the first embodiment of the present invention, figure 2 It is a cross-sectional view of the isometric link device 31 as the first embodiment, and its structure and operation are as follows.

[0037] A ring-shaped link device 3 with a plurality of clamping devices 2 for holding the ends of the sheet 1 on both sides of the sheet 1 (part of the link and the ring-shaped link on one side are omitted in the figure) , Consists of a plurality of equal-length link devices 31 formed in a folding rule shape. In addition, the ring-shaped link device 3 is driven by the entry-side sprocket 4 of the sheet. In addition, the clamping device 2 is opened and closed by an opening and closing device (not shown) such as an opening and closing guide provided at the entrance, and the s...

Example

[0054] Second embodiment

[0055] Borrow below Figure 7 The second embodiment of the present invention will be described.

[0056] Figure 7 This is a cross-sectional view of the isometric connecting rod device 31 of the second embodiment of the present invention. The difference from the first embodiment is that instead of flanged radial bearings 12 and 13, instead of flanged radial bearings 16 (16a, 16b) and 17 (17a, 17b), ball bearings 18, 19 as rolling bearings are arranged at the lower ends of the connecting rod shafts 8, 9 and the ball bearings 18, 19 roll on the guide rails 5, 6, The weight of the equal-length connecting rod device is supported by the ball bearing. Furthermore, roller bearings may be used instead of the ball bearings 18 and 19.

[0057] If the second embodiment is adopted, in addition to the effects of the first embodiment, complete rolling friction can be achieved, which can further reduce the weight of the link device and obtain a stretcher that is condu...

Example

[0058] The third embodiment

[0059] Borrow below Figure 8 versus Picture 9 The third embodiment of the present invention will be described. Figure 8 This is a cross-sectional view of the isometric connecting rod 31 of the third embodiment of the present invention. The difference from the first embodiment is that the bearing retainers 10 and 11 are provided with the opposite connecting rods of the bearing retainers 10 and 11 Rotation restriction devices 216 and 217 for free rotation of the central axis of the shafts 8 and 9. The rotation restriction devices 216 and 217 are configured to restrict the rotation movement of the bearing holders 10 and 11 by applying a rotation force in one direction by, for example, a torsion spring or the like.

[0060] By using the isometric link device constructed in this way, it is possible to prevent jittering during high-speed travel. That is, in order to run smoothly, some gaps are provided in a pair of radial bearings sandwiching the guide r...

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PUM

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Abstract

In order to achieve high speed with a simple structure in a stretching machine that uses a ring-shaped link device composed of a plurality of equal-length link devices formed in the shape of a folding rule to stretch a sheet, in the stretching machine of the present invention, a There is a ring-shaped link device having a plurality of clamping devices holding the ends of the thermoplastic resin sheet at both side ends of the sheet. The rod device is driven by the sprocket on the entrance side of the sheet, guided by the guide rail arranged in a flared shape in the direction of travel, after the sheet is extended, the sheet is removed, driven by the sprocket on the exit side and returned to the entrance side sprocket, wherein a pair of radial bearings are provided on the outer peripheral portion of the bearing at the lowermost end of the connecting rod shaft of the connecting plate forming the folding ruler portion of the connecting rod device, and the radial bearings are arranged so as to Rolls on both sides of the guide rail that restricts the movement of the link unit.

Description

technical field [0001] The present invention relates to an apparatus for stretching a sheet-shaped object, such as a thermoplastic resin film. Background technique [0002] The prior art synchronous biaxial stretching machine, as described in Japanese Patent Application Laid-Open No. 4-12957, is composed of a thrust pad bearing its own weight and a rolling bearing rolling in a guide groove to support a link device. In the link device configured in this way, the sliding resistance on the sliding surface of the thrust pad is relatively large, making it difficult to run at high speed. In addition, since lubricating oil is required for the sliding part, there is a danger of the lubricating oil splashing onto the membrane and contaminating the membrane. [0003] In order to solve such a problem, for example, as described in JP-A-11-77825, the thrust pad is formed as a rolling roller. However, in such a two-axis stretching machine, since the guide rails forming the guide grooves...

Claims

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Application Information

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IPC IPC(8): B29C55/02B29C55/16B29C55/20B65H20/16B65H23/028
CPCB29C55/165B29C55/20
Inventor 上田博信中岛一郎
Owner JAPAN STEEL WORKS LTD
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