JP3546256B2 - Web tenter device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a tenter device that conveys a web such as a film, engineering plastic film, or cloth in an expanded state, and more particularly to a web tenter device used in a high temperature environment of 250 ° C to 500 ° C.
[0002]
[Prior art]
As shown in FIG. 4, a tenter device 1 is known for heat-treating a film 2 in a stretched state, that is, in a spread state. The tenter apparatus 1 moves inside the heat treatment apparatus while holding both ears of the film 2 with pins or clips.
[0003]
Conventionally, when heat-treating a general-purpose resin film, since the temperature inside the heat treatment apparatus is at most 250 ° C., heat-resistant oil is supplied to a tenter chain constituted by a conveyor chain.
[0004]
[Problems to be solved by the invention]
However, recent engineering plastic films, particularly PI films, require heat treatment at a maximum of 500 ° C. Therefore, even if the heat-resistant oil is supplied, the tenter device needs to be operated without oil supply because it evaporates immediately due to the high temperature.
[0005]
5 and 6 are enlarged longitudinal sectional views of a tenter rail 100 and a tenter chain 102 moving along the tenter rail 100 in a conventional tenter device.
[0006]
As shown in FIG. 5, the tenter rail 100 is provided with rollers 104 for moving the tenter chain 102 at predetermined intervals, and the tenter chain 102 moves on the plurality of rollers 104. In this case, a pair of support walls 106 and 108 are provided to support the movement of the tenter chain 102.
[0007]
Further, in order to move the tenter chain 102 along the support walls 106 and 108, a cylindrical roller 110 is rotatably provided on the tenter chain 102.
[0008]
Further, the film 2 is fixed to the fixing member 112 protruding from the tenter chain 102 by pins 114.
[0009]
By the way, when the film 2 is fixed to the fixing member 112, the upper portion of the roller 110 contacts the right inner support wall 106 due to the tension of the film 2 as shown in FIG. Contacts the left outer support wall 108. Therefore, when the tenter chain 102 moves in this state, the contact A on the upper side of the roller 110 rotates in the direction of the arrow X, and the contact B on the lower side of the roller 110 attempts to rotate in the direction of the arrow Y.
[0010]
And if such rotation continues, as a result, the roller 110 will be in the state of abrasion as shown in FIG. The roller 110 thus worn slides without rotating, and metal powder is generated by the wear.
[0011]
Therefore, in view of the above problems, the present invention provides a tenter device that operates without lubrication even in a high-temperature environment and that does not wear rollers.
[0012]
[Means for Solving the Problems]
A tenter device according to claim 1 of the present invention is a tenter device that conveys a web in the front-rear direction in an expanded state, the pair of left and right tenter rails arranged on the left and right sides of the web conveyance path, and the pair of left and right tenter rails A tenter device having a pair of left and right tenter chains that move along the left and right and a fixing member for fixing a web provided at predetermined intervals on the pair of left and right tenter chains, respectively, on the left and right sides of the tenter chain. Support walls of the tenter rails are respectively arranged, and the tenter chain is provided with rollers for moving the tenter chain along the left and right support walls of the tenter rails, and the rollers are vertically movable. It has a two-stage structure consisting of an upper roller and a lower roller.
[0013]
A tenter device for a web according to a second aspect is the one according to the first aspect, wherein a pin is implanted in the fixing member for fixing the web.
[0014]
The web tenter device according to claim 3 is the web tenter device according to claim 1, wherein the fixing member for fixing the web is a clip.
[0015]
In the web tenter device of the present invention, since the roller has a two-stage structure consisting of an upper roller and a lower roller, the upper roller contacts one support wall of the tenter rail and rotates in one direction. The lower roller rotates in contact with the other support wall. However, the lower roller is independent of the upper roller and can rotate in the opposite direction to the upper roller, and does not wear.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
[0017]
The main structure of the tenter device 1 of the film 2 of this embodiment is the same as that shown in the prior art, and the difference is in the structure of the tenter chain 10.
[0018]
First, before describing the structure of the tenter chain 10, the structure of the tenter device 1 will be described.
[0019]
As shown in FIG. 4, the tenter device 1 is provided with a pair of left and right tenter rails 12 and 12 on both ears of the film 2 that is conveyed in an expanded state. An endless tenter chain 10 is movable on each of the tenter rails 12. That is, the tenter chain 10 is movable by the wheels 4 and 5 that are respectively in front of and behind the tenter rail 12. The wheels 4 and 4 are drive wheels.
[0020]
Next, the structure of the tenter chain 10 and the tenter rail 12 described above will be described in detail with reference to FIGS.
[0021]
As shown in FIG. 1, the tenter rail 12 includes a pair of left and right inner support walls 14 and an outer support wall 16, and a roller 18 rotates between the inner support wall 14 and the outer support wall 16 at predetermined intervals. Arranged freely. The tenter chain 10 moves between the inner support wall 14 and the outer support wall 16 while sliding on the roller 18.
[0022]
As shown in FIGS. 2 and 3, the tenter chain 10 includes first upper plates 22 and second upper plates 24 that are alternately disposed, and a first lower plate 26 and a second lower plate 28 on the lower side thereof. Alternatingly arranged. In order to automatically connect the first upper plate 22 and the second upper plate 24, the plates 22 and 24 are overlapped and connected to each other on the upper portion of the cylindrical fixed shaft 20, and the first lower plate 26 and the second upper plate 26 are connected to each other. In order to connect the lower plate 28, both plates 26, 28 are overlapped and connected at the lower part of the fixed shaft 20.
[0023]
In order to fix these four plates 22 to 28 in a freely rotatable manner, a male screw portion is provided at the upper end portion of the fixed shaft 20, and is fixed by a nut 32 through a washer 30.
[0024]
A cylindrical roller 34 is rotatably inserted in the fixed shaft 20 between the first upper plate 22 and the second upper plate 24 and the first lower plate 26 and the second lower plate 28. The roller 34 has a two-stage structure including an upper roller 38 and a lower roller 40 with a spacer 36 interposed therebetween. A cylindrical bush 42 made of stainless steel is interposed on the inner peripheral side of the upper roller 38 and the lower roller 40 so as to be rotatable with respect to the fixed shaft 20.
[0025]
A roller 34 composed of an upper roller 38 and a lower roller 40 moves while rotating between a pair of left and right inner support walls 14 and outer support walls 16.
[0026]
A fixing member 44 extends from the first upper plate 22 toward the inside of the tenter device 1, and a pin 46 for fixing the film 2 projects from the upper surface of the inner end portion of the fixing member 44. .
[0027]
In the tenter device 1 configured as described above, a state in which the tenter chain 10 moves on the tenter rail 12 will be described.
[0028]
As shown in FIG. 1, the tenter chain 10 moves on a plurality of rollers 18. In this case, since the film 2 is stretched, the rotation shaft of the fixed shaft 20 of the tenter chain 10 is inclined inward as shown in FIG. That is, the upper roller 38 contacts the inner support wall 14, and the lower roller 40 contacts the outer support wall 16. The upper roller 38 contacts the inner support wall 14 and rotates in the direction of the arrow X in FIG. On the other hand, the lower roller 40 in contact with the outer support wall 16 rotates in the direction of the arrow Y in FIG. As described above, the rotation directions of the upper roller 38 and the lower roller 40 are completely opposite to each other. However, since the roller 34 is divided into two upper and lower stages, the respective rollers can be rotated, and wear of the roller as in the conventional case is reduced. It does not occur.
[0029]
Therefore, the tenter device 1 can be operated without oil supply, that is, the film 2 such as engineering plastic film or PI film can be operated without oil supply even in a high temperature (250 ° C. to 500 ° C.) environment.
[0030]
Moreover, since there is no wear of the roller 34, generation | occurrence | production of metal powder decreases and it can contribute to the improvement of the lifetime of the tenter chain 10.
[0031]
Furthermore, since this metal powder is not generated, there is an effect that adhesion to the film 2 is reduced. In particular, the adhesion of the metal powder is a problem in the film 2 for electronic materials, but such a problem does not occur in the tenter device 1 of the present embodiment.
[0032]
In the above embodiment, the tenter device 1 has been described as a pin tenter device, but the same effect can be obtained even in a clip tenter device in which a clip for gripping the film 2 is provided on the fixing member 44 instead.
[0033]
Moreover, although it is suitable to use the tenter apparatus of a present Example in a high temperature environment, you may use it in a low temperature environment.
[0034]
Furthermore, the web 2 is not limited to the film 2 but may be another long web such as cloth.
[0035]
【The invention's effect】
As described above, in the web tenter device of the present invention, the roller of the tenter chain is composed of the upper roller and the lower roller of the upper and lower stages, and the upper roller and the lower roller rotate in the respective directions. Will not occur. Therefore, the tenter device can be operated in an oil-free state even in a high temperature environment.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a tenter rail and a tenter chain as viewed from the front according to an embodiment of the present invention.
FIG. 2 is a longitudinal sectional view similarly seen from the side.
FIG. 3 is a plan view of the same.
FIG. 4 is a plan view of the tenter device.
FIG. 5 is a longitudinal sectional view seen from the front of a conventional tenter rail and a tenter chain.
FIG. 6 is a front view showing a worn state in a conventional roller.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Tenter chain 12 Tenter rail 14 Inner support wall 16 Outer support wall 18 Roller 20 Fixed shaft 34 Roller 36 Spacer 38 Upper roller 40 Lower roller 44 Fixed member 46 Pin

Claims (3)

A tenter device that conveys the web in the front-rear direction in a spread state,
A pair of left and right tenter rails arranged on the left and right sides of the web conveyance path;
A pair of left and right tenter chains respectively moving along the pair of left and right tenter rails;
A fixing member for fixing the web provided at predetermined intervals on the pair of left and right tenter chains;
In a web tenter device having
Support walls of the tenter rail are arranged on the left and right sides of the tenter chain, respectively.
The tenter chain is rotatably provided with a roller for moving the tenter chain along the left and right support walls of the tenter rail,
The web tenter device according to claim 1, wherein the roller has a two-stage structure including an upper roller and a lower roller. 2. The web tenter device according to claim 1, wherein a pin is implanted from the fixing member for fixing the web. 2. The web tenter device according to claim 1, wherein the fixing member for fixing the web is a clip.

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