JPH0438982Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) The present invention relates to a tenter clip that is applied to a biaxial stretching machine or the like for a strip-like object such as a film.

(Prior Art) FIGS. 2 to 5 show an example of a conventional tenter clip holding device for holding a film, etc. In each figure, reference numerals 1 and 1 indicate a pair of left and right tenter clips, and the tenter clips 1, 1 is mounted on a pair of clip bases 3, 3 which are slidably disposed opposite to each other on the respective rails 2 as shown in the figure. Further, the clip stands 3, 3 move at a predetermined speed from the entrance of the tenter 8, which will be described later, toward the exit, and are turned around 180° at the exit and return to the entrance.

Reference numeral 4 denotes a clip main body attached to a clip base 3. The clip main body 4 has an arch-shaped upright part rising from a base 4a, and a clip lever support shaft 5 is provided at the tip of the upright part. ing.
Reference numeral 6 denotes a clip lever whose approximately central portion is rotatably supported by the support shaft 5, and the clip lever 6 has an upper lever 6a bordering the support shaft portion formed by the support shaft 5.
and a lower lever 6b.

7 is a liner attached to the base 4a of the clip body 4; 12 is a tension spring tensioned between the upper lever 6a of the clip lever 6 and the clip body 4; both tension springs 12 support the clip lever 6; The lower end lever 6b is always rotated about the shaft 5 from the state shown by the two-dot chain line in FIG. 2 to the state shown by the solid line.
Both side ends (edges) of the film, etc. 11 are gripped between the lower edge 6c of the liner 7 and the liner 7.

In FIG. 4, 8 is a tenter, 9a is a clip opener provided at the outlet of the tenter 8, 9c is an opener provided at the entrance, and 9d
9b is a clip closer provided at the entrance of the tenter 8, and 9b is a closer provided at the exit.
Reference numerals 10a and 10b indicate wear rings disposed at the outlet and inlet of the tenter 8, respectively.

Now, as will be described later at the entrance of the tenter 8, the left and right ears are gripped between the lower edge 6c of the lower lever 6b of the left and right clip levers 6 and the liner 7 on the base 4a, and the left and right ears are gripped. 2,2
The film 11 that moves together with the clip tables 3, 3 sliding on it is stretched to a predetermined magnification while passing through the tenter 8. At the outlet of the tenter 8, the upper levers of the left and right clip levers 6, 6 6a, 6a contact the clip opener 9a and wear ring 10a at the outlet of the tenter 8, so the left and right clip levers 6, 6 are in contact with the tension spring 1.
2, the film 11 is rotated to the state shown by the two-dot chain line in FIG.

Next, while the left and right tenter clips 1, 1 change direction by 180 degrees, the upper lever 6a comes into contact with the wear ring 10a and the clip closer 9b, so that the clip lever 6 is moved by the tension spring 12.
It returns to the state shown in the solid line in FIG. 2 by the urging force of . on the other hand,
At the entrance of the film 11 to the tenter 8, the clip lever 6 is connected to the clip opener 9c.
The wear ring 10b returns the film 11 to the state indicated by the two-dot chain line in FIG. 2, and then returns to the state shown in the solid line shown in FIG. It is designed to be grasped.

(Problems to be Solved by the Invention) Rectangular film entrainment prevention plates 15 as shown in FIGS. 3 and 5 are attached to both sides of the clip 1, and the top and bottom of the plates are attached to the clip body 4 and the base 4a. It is being This film entrainment prevention plate 15 is designed so that when the clip lever 6 rotates around the fulcrum O at the tenter outlet and releases the grip on the lug 11a of the film 11, the cut lug is held together with the cut lug in the space 1.
It plays the role of preventing entanglement up to 3.

On the other hand, a sensor is provided at the entrance of the tenter 8, and a clip position is set so that the film edge can be gripped at a certain distance from the end of the film. However, if the edge portion of the film fluctuates widely from side to side, the film end 11a may curl up along the front surface of the film entrainment prevention plate 15, as shown by the solid line in FIG. At this time, if the clip lever 6 moves to the state indicated by the two-dot chain line, problems arise in that the film is pushed out of the clip as shown by the two-dot chain line, or that the film cannot be gripped due to its rigidity. At this time, the lower edge 6e of the clip lever 6 comes into direct contact with the plate 7, promoting wear between the parts.

Furthermore, in order to prevent this, if the mounting position interval L of the film entrainment prevention plate 15 shown in FIG. The entrainment prevention effect that should originally exist is reduced.

The present invention has been made to solve these problems, and aims to provide a tenter clip that can prevent the ears from rolling up and can fully perform its original function as a plate for preventing the ears from getting rolled up. It is.

(Means for Solving the Problems) Therefore, the present invention is provided with clips installed on a pair of clip stands that are installed from the entrance to the exit of the tenter, and that move on rails that reverse from the exit and return to the entrance. In a tenter clip in which a clip lever is rotatably provided on the installed clip body and a film entrainment prevention plate is fixed to both sides of the clip body, the side of the film entrainment prevention plate opposite to the film selvedge is diagonally This is a solution to the above problem.

(Function) When the lateral movement of the selvedge of the strip is large, even if the selvedge hits the strip tangle-in prevention plate, it is guided by the diagonally cut portion and pushed downward, resulting in the selvage curling up. Eliminates the occurrence of clipping errors due to At the same time, since the intersecting range between the tip of the clip lever and the insertion prevention plate is not changed from the conventional one, the effect of preventing the ear from being caught in the ear part is also well achieved.

(Example) Hereinafter, a case where a typical example of the present invention is applied to a film biaxial stretching machine will be described with a focus on the differences from the conventional one based on FIG.

In the figure, reference numeral 1 denotes a tenter clip, and the tenter clip 1 consists of a clip body 4 and a clip lever 6, as in the conventional case, and a film entrainment prevention plate 21 is attached to the side surface of the clip body 4.

Here, the feature of the present invention is that the shape of the film entrainment prevention plate 21 is replaced with a rectangular film entrainment prevention plate 15 as shown in FIG. The opposite side is cut diagonally, the film is pushed down and the shape is prevented from curling, and the film contact point and clip lever 6
The distance L from the end of the clip is set to the same length as the conventional one.

To describe its operation, when the clip lever 6 rotates from the position shown by the solid line to the position shown by the two-dot chain line at the entrance of the tenter 8, the edge portion 11 of the film 11
a is the diagonal cut portion 21 of the film entrainment prevention plate 21;
a, and the tip is pushed downward, so that the edge portion 11a of the film 11 is not curled up and the film is gripped smoothly. Even if a cut edge 11a occurs at the outlet of the tenter 8, the diagonal cut 21a prevents the film 11 from being pushed downward and being rolled up.
Release the film grip smoothly.

(Effects of the Invention) As described above in detail, according to the present invention, the film can be smoothly gripped by the clip without causing the curling phenomenon caused by the horizontal movement of the film edges. As a result, the edge of the clip lever does not come into contact with the liner without intervening the film, eliminating problems such as damage to the edge and extending the service life of the component. Furthermore, in the process of releasing the grip of the film from the clip, with this invention, the film is sufficiently prevented from becoming entangled, so the cut ears are continuously and smoothly ejected toward the exit, allowing the operator to safely operate the machine without having to stop it. It is possible to dispose of cut ears.

[Brief explanation of the drawing]

Fig. 1 is a front view of a tenter clip showing a typical embodiment of the present invention, Fig. 2 is a partial sectional view taken in a direction perpendicular to the film traveling direction in a conventional tenter, and Fig. 3 is a perspective view of the same tenter clip. figure,
Figure 4 is a plan view showing the general structure of the tenter;
The figure is a V view in FIG. 3. Explanation of the main parts of the figure, 1...Tenter clip, 4...Clip body, 6...Clip lever, 11...Film, 11a...Ear part, 21...
...Film entrainment prevention plate, 21a...Diagonal cut portion.

Claims (1)

[Scope of utility model registration request] A clip lever is rotatably provided on the clip main body, each 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. 1. A tenter clip having a film entrainment prevention plate fixed to the side of a clip body, characterized in that the side of the film entrainment prevention plate facing the film edge is cut diagonally.