JP2556206Y2 - Tenter clip - Google Patents

Description

[Detailed description of the invention]

[0001]

INVENTION The present invention relates, through the rising portion from the base
A clip lever is pivotally supported at the tip of a pair of arms at a predetermined interval raised in a cantilever shape, and a holding plate at the tip of the clip lever grips the film between itself and the base. The present invention relates to a tenter clip configured to take a first position and a second position that opens by rotating a predetermined angle.

[0002]

2. Description of the Related Art When a film formed of an oriented resin is stretched in an atmosphere at a temperature between the softening point and the melting point,
A film having a large tensile strength in the stretching direction can be obtained, and a device for obtaining such a film having a large strength is conventionally well-known as a stretching device, and is generally configured as follows. That is, a plurality of tenter clips for gripping both ears of the film, two chains running while spreading while being guided by a pair of rails, and a furnace adjusted to an atmosphere at an intermediate temperature between the softening point and the melting point of the film. It is composed of The tenter clips are attached to the chain at predetermined intervals, and run in the furnace while holding both ears of the film. While running, it is stretched as described above.

[0003] A tenter clip which runs while holding both ears of a film is also well known in the art, for example, Japanese Utility Model Publication No. 4-3898.
This is shown in No. 2. As shown in FIG. 2, the tenter clip includes a holding table 30 and an arm 3 integrally provided on the holding table 30 at a predetermined interval.
1 and 31, and a click lever 32 pivotally supported at the tip of the arms 31, 31. Although not shown in the drawing, the click lever 32 is biased so that the upper portion 33 is rotated in a clockwise direction by a spring. Therefore, the grip portion 34 of the click lever 32 is in a state of being pressed against the grip table 30.

When the tenter clip constructed as described above is attached to the chain and travels, when the clip opener acts on the upper portion 33 of the click lever 32 at the entrance of the furnace, the grip portion 34 opposes the spring. Open as indicated by the dashed line. The stretched film is supplied to the opened tenter clip, and when the film is opened by the closer, the grip portion 3 is opened by the spring.
4 is pressed against the holding table 30, and both ears of the film are held. And it runs while spreading in the furnace. At the furnace exit, a clip opener acts on the upper part 33 of the click lever 32 as well, and the gripper 34 opens against the spring. Then, the film stretched to a predetermined magnification is opened and sent to the next step.

In some cases, the stretched film is torn and cut in the furnace due to impurities or the like remaining in the film material. At the outlet of the furnace, the holding portion 34 is indicated by a chain line in FIG. As described above, when the ears are opened against the spring, the cut ears are caught by the grips 34 toward the bases of the arms 31, which may hinder driving. Then, film wrap prevention plate 3
5, 35 are provided. This film winding prevention plate 3
5 and 35 are arms 31, 3 on both outer sides of the clip body.
It is attached by screws 36, 36 across 1 and the holding table 30.

[0006]

The film roll-up preventing plates 35, 35 can also prevent the cut film from being rolled up, but have various problems. For example, the holding table 30, the arms 31, 31 and the like are generally formed from a casting, but the film winding prevention plates 35, 35
Since it is formed of a steel plate separately from 1, 31, etc., there is a disadvantage that the number of parts increases and the manufacturing cost increases. Also screw 3
Assembly man-hours for attachment at 6, 36 are also required. Further, the tenter clip is forcibly driven by the chain as described above, so that the screw 3
There is also a possibility that the films 6 and 36 become loose and the film winding prevention plates 35 and 35 come off. The present invention seeks to provide a tenter clip that solves the above-mentioned conventional problems. Specifically, despite the fact that the film entrapment accident is reliably prevented, the number of parts and the number of assembly steps are reduced. Without increasing
Also without any occurrence of trouble such as bis-is loosened, and even wood
Fees, weight, etc. do not become particularly large,
It is an object of the present invention to provide a tenter clip capable of increasing an area of contact with an ilum .

[0007]

According to the present invention, in order to achieve the above object, a clip lever is pivotally supported at a tip end of a pair of arms at a predetermined interval rising from a base via a rising portion in a cantilever manner. A tenter clip in which a holding plate portion at a tip end portion of the clip lever has a first position for holding a film between the clip lever and the base and a second position for opening by rotating a predetermined angle. , The arm standing
When the clip lever assumes the second position, the upper end portion becomes thinner and extends to a position where it intersects with the holding plate portion.
It is configured to exist.

[0008]

The tenter clip is attached at a predetermined interval to, for example, two chains that are guided and traveled by a pair of rails. Then, the inside of the furnace adjusted to the predetermined temperature atmosphere is driven. When the clip lever is in the second position, the stretching film is supplied to the tenter clip in a known manner. When supplied, the clip lever eventually assumes the first position. Then, the film is sent through the furnace with its both ears gripped. In the meantime, it is stretched as is well known.
When extended in this way, the tip of the rising edge of the arm
When the clip lever is in the second position, the holding plate portion
It extends thinly to the position where it intersects with
At the exit, even if the film ears are cut
No film entrapment occurs.

[0009]

FIG. 1 shows an embodiment of the present invention. As shown in FIG. 1, the tenter clip 1 according to the present embodiment includes a clip body 2 and a clip lever 20. Clip body 2
Is a base 3 attached to a clip table moving along a rail, rising portions 4 and 4 integrally rising from the base 3, and a cantilevered front from the rising portions 4 and 4, ie, FIG. 5A, the arm 5 is extended to the left. The ends of the arms 5 are bearings 6. The base 3 has a predetermined width. The rising portions 4, 4 rise from both sides of the base 3. Therefore, the arms 5 and 5 also have a predetermined interval, and the bearings 6 at the distal ends of the arms 5 and 5
Between 6, the boss 23 of the clip lever 20 described later is rotatably attached.

The clip lever 20 is composed of a pressing plate portion 21 having a predetermined width positioned below in the figure and a rod-shaped operating rod portion 22 positioned above. The operation rod portion 22 and the holding plate portion 21 are bent from the boss portion 23 into a substantially "-" shape as shown in FIG. The boss 23 has substantially the same width as the space between the bearings 6 at the distal ends of the arms 5, and has an axial hole formed in the axial direction. The pressing plate 21 is wider than the boss 23. Then, the widened distal end portion 25 contacts the surface of the base 3 to grip the film F between the film F and the surface of the base 3. In the tenter clip 1 configured as described above, the boss 23 of the clip lever 20 is positioned between the bearings 6, 6, and the shaft 8 is connected to the bearings 6, 6 and the boss 23.
Are pivotally supported by the arms 5 and 5 by passing through the shaft holes. The tenter clip 1 is urged by a spring so as to be in a position shown by a chain line in FIG. 1A, but the spring is not shown.

[0011] raised portion 4, 4 and the arm 5 and 5, since they must be pivotally supports the clip lever 20, but has a predetermined thickness T, the rising portion 4,4 tip 11, 11
Is thinner than this, and extends to a position where the presser plate 21 intersects with the presser plate 21 in a side view when the presser plate 21 assumes the second position . The extended portions 10 and 10
It has a stopping effect. Extended part 1
Since the reference numerals 0 and 10 are thinner than the rising portions 4 and 4 , the clip lever 20 is urged by a spring, and the leading end 25 of the holding plate portion 21 contacts the surface of the base so that the film F
And a second position opened by the clip opener against the spring. When the clip lever 20 is in the second position shown by the solid line,
Inner surfaces of portions 10 and 10 where both side surfaces of distal end portion 25 extend
Not contact you so that things in.

Next, the operation of the above embodiment will be described.
The tenter clips 1 are mounted facing each other on a clip table driven by a chain running at a predetermined interval. Then, driving is performed in a known manner. The clip opener at the entrance of the furnace, click lever 2
It acts on the operation rod portion 22 of 0. The holding plate portion 21 opens as shown by the solid line against the spring. The stretched film F is supplied to the opened tenter clip. When released by the closer, the tip portion 25 of the holding plate portion 21 contacts the surface of the base 3 by a spring,
Both ends of the film F are gripped by the front end 25 of the holding plate 21 and the surface of the base 3. And it runs while spreading in the furnace. At the furnace outlet, the clip opener acts on the operating rod 22 of the click lever 20 as well, and the presser plate 21 opens against the spring. Then, the film F stretched to a predetermined magnification is opened and sent to the next step.

When the stretched film is torn and cut in the furnace, the holding plate 21 is placed at the outlet of the furnace as shown in FIG.
As shown by the solid line in (a), when the ear is opened against the spring, the cut ears are likely to be caught by the pressing plate 21 toward the roots of the rising portions 4, Tip portions 11, 11 of rising portions 4, 4 of arms 5, 5
However, when the presser plate 21 takes the second position, the presser plate 21
Since the film F extends to the position where the film F intersects , the film F is not involved. Note that the above embodiment is an example relating to a single frappe in which one holding plate portion 21 is provided for the clip body 2, but in the case of a double frappe in which two holding fringes are provided, the holding plate portion 21 and the holding It is apparent that the same operation and effect can be obtained by forming the winding prevention portion 10 on the arm between the plate portions 21.

[0014]

[Effect of the Invention] As described above, according to the present invention , the tip of the rising portion of the arm on which the clip lever is pivotally supported is :
When the clip lever assumes the second position to open the film, because it extends thinner position until in which interlaced with the presser plate portion, even if the ear portion of the film is cut, the film by the tip portion of the rising portion Is reliably prevented. Thus, according to the present invention, even though the entrainment prevention effect is obtained, since the front end portion of the rising portion of the arm is only extend thinner, it is the this number of components is increased No. Therefore, there is no increase in the number of assembling steps to be attached to the arm, an increase in the assembling cost, and no occurrence of troubles such as the loosening of the mounting screws and the removal of the winding prevention member as in the related art. The tip of the rising part of the arm is
It extends to the position where it intersects the plate, but it is thin
Therefore, material costs, weight of tenter clips, etc. are particularly large.
It doesn't get any harder. And even thinner
Therefore, increase the width of the holding plate to increase the contact area with the film.
Can be widened.

[Brief description of the drawings]

FIG. 1 is a view showing an embodiment of the present invention, in which (a) is a side view and (b) is a front view.

FIG. 2 is a perspective view showing a conventional example.

[Explanation of symbols]

Reference Signs List 3 base 4, 4 rising part 5 , 5 arm 10, 10 extended part 11 , 11 tip 20 clip lever

Claims (1)

(57) [Scope of request for utility model registration] 2. A method according to claim 1, wherein the step of raising the base from the base is carried out.
A clip lever (20) is pivotally supported at the distal ends of a pair of arms (5, 5) at predetermined intervals standing up in a cantilever shape, and a pressing plate (2 ) at the distal end of the clip lever (20).
(1) a tenter clip in which a first position for holding a film (F) between the base and the base (3) and a second position for opening by rotating a predetermined angle are provided; The tip (1) of the rising part (4, 4) of (5, 5)
1, 10) The tenter clip, wherein when the clip lever (20) is in the second position, the clip lever (20) is thinly extended to a position where the clip lever (20) intersects with the holding plate (21).