JPH0310494B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for attaching and detaching films, etc. using tenter clips, which can be applied to tenter machines, biaxial stretching machines, and the like.

An overview of conventional tenter clips is shown in Figures 1 to 3.
To explain the figure, a tenter clip 1 is attached to a clip stand 3 which can be placed on a rail 2.
and are chained together to form a single link. 4 is the clip body, base 4
It has an arch-shaped standing part that stands up from a,
A clip lever shaft 5 is provided at the tip thereof, and forms a pivot point O for rotation of the clip lever 6 in the direction of the arrow. That is, the clip lever 6
is rotatably pivoted by a clip lever shaft 5. Further, a liner 7 is provided on the base 4a of the clip body 4 for convenience in terms of clip function and processing.

Further, the clip lever 6 has a lever member 6a formed above the fulcrum O, and is adapted to come into contact with a clip opener 9 and a wear ring 10 of a cam placed at the entrance/exit portion of the tenter 8. At this time, the clip lever 6 is rotated about the fulcrum O, so that the lower portion 6b of the clip lever 6 is lifted or lowered from the fulcrum O, and the film 11 can be attached to and removed from the tenter clip 1. A tension spring 12 is attached between the lever member 6a and the clip body 4 so as to bias the clip lever 6 in the direction of gripping the film end.

The film 11 is stretched to a predetermined magnification while passing through the tenter 8, and the lever member 6
a is a clip opener 9a and a wear ring 1;
By contacting 0a, the film 11 is rotated to the state shown by the two-dot chain line in FIG. 1, and the film 11 is opened and guided to the subsequent process. Next, when the wear ring 10a contacts the clip opener 9b, the clip lever 6 returns to the position shown by the solid line in FIG. On the other hand, at the entrance, the clip opener 9c and the wear ring 10b move the clip lever 6 to the position indicated by the two-dot chain line in FIG.
and the clip opener 9d, the clip lever 6 returns to the position shown by the solid line in FIG.
Grip the ear portion 11a of No. 1.

However, the conventional tenter clips shown in FIGS. 1 to 3 have the following drawbacks. That is, the film 11 is stretched to a predetermined magnification while passing through the tenter 8, and at the outlet thereof, the lever member 6
a is a clip opener 9a and a wear ring 10
The film 11 is released by touching a.

Next, as the tenter clip 1 changes direction by 180 degrees and the lever member 6a continues to contact the wear ring 10a and the clip opener 9b, the clip lever 6 gradually returns to the position indicated by the solid line in FIG. , the edge 6c of the clip lever 6 and the liner 7 without intervening the film 11.
Since bringing the metal parts into contact with each other results in metal-to-metal contact, there is a drawback that problems such as damage to the edges 6c occur.

The present invention was proposed in order to eliminate the above-mentioned conventional drawbacks, and aims to prevent the edge of the clip lever from coming into contact with the liner without intervening the film, and to prevent the edge of the clip lever from coming into contact with the liner without interposing the film. Film, etc. using a tenter clip, which has a clip lever rotatably attached to the clip body installed on a pair of clip stands that move on a rail that is installed across the paper, reversed from the exit part, and returned to the entrance part. In the attaching/detaching device, a pressing device consisting of an inner cylindrical body and an outer cylindrical body each containing only a compression spring is disposed between the clip lever and the clip body, and the cylindrical bodies are slidably assembled together. At the same time, the other ends of the clip levers and the clip body are swingably connected, and the pressing device presses the clip body until the clip body returns from the exit portion to the entrance portion of the tenter as the clip base moves. It is an object of the present invention to provide a device for attaching and detaching a film or the like using a tenter clip in which the edge of the clip lever is not damaged by configuring the edge of the lever to be separated from the clip body.

The present invention will be described below with reference to embodiments shown in the drawings.
First, in the embodiment shown in FIGS. 4 to 8, differences from the conventional device will be explained. Reference numeral 21 denotes a clip lever, and a notch 23 is formed in a boss 22 to fix a bracket 24. Further, projections 25 are provided on both sides so that when the clip lever 21 rotates counterclockwise in FIG. 4, it comes into contact with the clip body 4 and stops as shown in FIG.

26 is a pressing device, and the inner cylindrical body 27 is the outer cylindrical body 2.
8 and is loaded with a compression spring 29. The inner cylinder 27 is rotatably supported by the bracket 24, and the outer cylinder 28 is rotatably supported by a bracket 30 fixed to the clip body 4.

In addition, in FIG. 4, the pressing device 26 grips the film 11 between it and the liner 7, and when the clip lever 21 rotates from FIG. 4 to FIG. After that is the clip lever 21
is set so that the state shown in FIG. 5 can be maintained. In addition, in the above embodiment, the conventional
The tension spring 12 shown in the figure, the wear ring 10a,
10b and clip openers 9b and 9c have been deleted. In the figure, 9a and 9d are clip openers, 31 is a lever member, and 32 is a fulcrum.

Next, to explain the operation, the film 11 is stretched to a predetermined magnification while passing through the tenter 8, and at the exit part, the lever member 31 is moved to the clip opener 9.
contact a. Therefore, the clip lever 21 is the fourth
In the figure, the film 11 is rotated counterclockwise against the pressing device 26 to release the film 11.

Next, the protrusion 25 comes into contact with the clip body 4 and stops in the state shown in FIG. Hold the state and press the clip lever 2
1 is kept open. That is, the clip lever 21 returns to the entrance portion of the tenter 8 while maintaining a predetermined distance from the liner 7.

Next, the film 1 is placed at the entrance of the tenter 8.
1 will be explained. Clip lever 2
When the clip lever 1 reaches the entrance portion while being held in the state shown in FIG. 5, the lever member 31 of the clip lever 21 contacts the clip opener 9d.
It rotates clockwise against the pressing device 26, grips the film 11, and moves toward the outlet of the tenter 8, as shown in FIG. Note that a plurality of pressing devices 26 may be provided.

Next, in the embodiments shown in FIGS. 9 and 10, a simplified example of how to receive the compression spring in the clip lever 21 will be explained.
The protrusion 41 is brought into direct contact with the notch 23 of the clip, and the bar 42 fixed to the clip body 4 side is
Although the notch 43 of the outer cylindrical body 28 is brought into contact with the notch 43, there is no difference in operation and effect. Furthermore, although FIG. 10 shows a bar 44 provided on the clip lever 21 side in place of the structure shown in FIG. 9, there is no difference in operation and effect in this case as well.

The present invention is constructed as described in detail above, and consists of an inner cylindrical body and an outer cylindrical body in which only a compression spring is loaded between the clip lever and the clip body, and the cylindrical bodies are slidable against each other. By disposing the combined pressing device, there is no restriction on the inner diameter side of the compression spring, so a small-sized compression spring can be used. Therefore, compared to a device in which a guide rod is attached to the center of a compression spring, the entire pressing device can be made smaller, and there is no need for precision machining such as spherical bearing machining, resulting in cost reduction. This allows the clip lever to be held in the rotational position without the film intervening, eliminating contact between the edge of the clip lever and the liner, eliminating problems such as edge damage, and extending the service life of the part. can do. Further, according to the present invention, the conventional clip openers 9b, 9c and wear rings are no longer necessary, and the number of parts can be reduced.

[Brief explanation of drawings]

Fig. 1 is a partial cross-sectional view of a conventional tenter in a direction perpendicular to the film traveling direction, Fig. 2 is a perspective view of the tenter clip shown in Fig. 1, Fig. 3 is a plan view schematically showing the tenter; 4 is a partial cross-sectional view of a tenter clip in a film gripping state showing an embodiment of the present invention, FIG. 5 is a partial cross-sectional view of the tenter clip in a film open state, and FIG. 6 is a view taken in the direction of the X arrow in FIG. FIG. 7 is a view along the Y arrow in FIG. 4, FIG. 8 is a schematic plan view of the tenter showing only one side, and FIGS. 9 and 10 are main parts of the second and third embodiments, respectively, which are different from FIG. 4. It is a front view and a perspective view which show. Explanation of the main parts of the diagram, 4...Clip body, 2
1... Clip lever, 26... Pressing device, 27
...Inner cylinder, 28...Outer cylinder, 29...Compression spring.

Claims (1)

[Claims] 1. A clip lever is rotatably attached to a clip body installed on a pair of clip stands that are installed from the entrance to the exit of the tenter, and move on a rail that reverses from the exit and returns to the entrance. In the tenter clip attaching/detaching device for film, etc., a pressing device consisting of an inner cylindrical body and an outer cylindrical body each having only a compression spring loaded therein is disposed between the clip lever and the clip body. The clips are slidably combined, and the other ends of the clips are swingably connected to the clip lever and the clip body, and the pressing device moves the clip body from the outlet of the tenter to the entrance as the clip base moves. A tenter clip attachment/detachment device for film, etc., characterized in that the edge of the clip lever is separated from the clip body until the tenter clip returns to its original position.