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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 direction, a mechanically complicated structure has to be adopted in order to make the curved portion follow the direction of travel.

Method used

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  • Sheet-like object spreader
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Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

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

[0036] figure 1 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 equal-length link device 31 as the first embodiment, and its configuration and operation are as follows.

[0037] On both sides of the sheet 1, there is a ring-shaped link device 3 with a plurality of clamping devices 2 that hold the end of the sheet 1 (a part of the link and the ring-shaped link on one side are omitted in the figure) , It is composed of a plurality of equal-length link devices 31 formed into a folding rule shape. In addition, the endless link device 3 is driven by the sheet inlet side sprocket 4 . In addition, an opening and closing device (not shown) such as an opening and closing guide provided at the entrance opens and closes the clamping device 2 and clamps the sheet 1, and is he...

no. 2 example

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

[0056] Figure 7 It is a cross-sectional view of an equal-length link device 31 as a second embodiment of the present invention. The difference from the first embodiment is that radial bearings without flanges are used instead of radial bearings 12 and 13 with flanges. 16 (16a, 16b) and 17 (17a, 17b), the 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 guiding rails 5, 6, The weight of the equal-length linkage is supported by spherical bearings. Furthermore, it is also possible to replace the ball bearings 18, 19 with roller bearings.

[0057] If the second embodiment is adopted, in addition to the effects of the first embodiment, complete rolling friction can be realized, the weight of the link device can be further reduced, and a stretching machine that is advantageous for high s...

no. 3 example

[0059] Borrow below Figure 8 and Figure 9 A third embodiment of the present invention will be described. Figure 8 It is a cross-sectional view of an equal-length connecting rod 31 as a third embodiment of the present invention, which is different from the first embodiment in that the bearing holders 10 and 11 are provided with restraining bearing holders 10 and 11 against the connecting rod. Rotation motion limiting means 216, 217 for the free rotation of the center shafts of the shafts 8, 9. The rotational movement restricting means 216 and 217 are configured to restrict the rotational movement of the bearing holders 10 and 11 by imparting a rotational force in one direction by, for example, a torsion spring or the like.

[0060] By using the equal-length link device constructed in this way, it is possible to prevent vibration during high-speed travel. That is, for smooth running, some gaps are provided in a pair of radial bearings provided across the guide rail. Adjus...

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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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