JPS6365014B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for holding a film or the like using a tenter clip, which can be applied to a tenter, a biaxial stretching machine, and the like.

1 to 3 show an example of a conventional tenter clip gripping device for film, etc. In each figure, reference numerals 1 and 1 indicate a pair of left and right tenter clips, and the tenter clips 1 and 1 are attached to rails, respectively. It is mounted on a pair of clip bases 3, 3 which are slidably disposed opposite to each other as shown in the figure. Further, the clip stands 3, 3 move at a predetermined speed from the inlet of the tenter 8, which will be described later, toward the outlet, and are turned 180 degrees at the outlet to return to the inlet.

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. It is being Reference numeral 6 denotes a clip lever whose approximately central portion is rotatably supported on the support shaft 5, and the clip lever 6 is formed of an upper lever 6a and a lower lever 6b, which are supported by the support shaft 5 as a boundary. ing.

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;
is always rotated about the support shaft 5 from the state shown by the two-dot chain line shown in FIG. It is designed to be held by the ears.

In FIG. 3, 8 is a tenter, 9a is a clip opener installed at the outlet of the tenter 8, 9c is an opener installed at the entrance, and 9d
9b is a clip closer provided at the entrance of the tenter 8; 9b is a closer provided at the exit; 1
0a 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 rails are gripped. 2,
The film 11 that moves together with the clip tables 3, 3 sliding on the tenter 8 is stretched to a predetermined magnification while passing through the tenter 8. Since the levers 6a, 6a contact the clip opener 9a and the wear ring 10a at the outlet of the tenter 8, the left and right clip levers 6, 6 resist the tension spring 12 and are in the state shown by the two-dot chain line in FIG. The film 11 is rotated to release the grip on the ears (ends on both sides) of the film 11, and send the film 11 to the next process.

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 biasing force of the tension spring 12 as shown in FIG. The state returns to the solid line state. On the other hand, at the entrance of the film 11 to the tenter 8,
The clip lever 6 is moved to the state shown by the two-dot chain line in FIG. 1 by the clip opener 9c and the wear ring 10b, and then returns to the state shown by the solid line shown in FIG. 1
1a (both side ends) are gripped.

However, the conventional tenter clip gripping device for film, etc. has the following drawbacks. That is, as described above, the film 11 is stretched to a predetermined magnification while passing through the tenter 8, and at the outlet of the tenter 8, the upper lever 6a of the clip lever 6 comes into contact with the clip opener 9a and the wear ring 10a. As a result, the clip lever 6 rotates about the support shaft 5 against the tension spring 12 to the state shown by the two-dot chain line, thereby releasing the film 11.

Next, while the left and right tenter clips 1, 1 change direction by 180 degrees, the wear ring 10a and the clip closer 9b continue to come into contact with the upper lever 6a, and the clip lever 6 gradually returns to the state shown by the solid line in FIG. However, in this case, the edge 6c (lower end) of the lower lever 6b of the clip lever 6 comes into direct contact with the liner 7, resulting in metal-to-metal contact, so there is a problem that the edge 6c of the lower lever 6b is damaged. There were some drawbacks that occurred.

Also, move the film 11 to the edge 6 of the lower lever 6b.
c and the liner 7 (solid line in FIG. 2) to the open state (double-dashed line in FIG. 2), the lower lever 6b of the clip lever 6 is moved against the clip body 4. It stops when it comes into contact with it.

That is, since the width W _L of the lower lever 6b of the clip lever 6 is larger than the inner distance W _C between the clip bodies 4, 4, the clip lever 6 can be used in both the film gripping state (solid line in FIG. 2) and the film release state. (double-dashed line in FIG. 2), so when the film 11 is gripped, the edge 6c
It is extremely difficult to clean, maintain, and inspect the edge 6c to remove deposits (for example, low-melting copolymers) that adhere to the edge 6c and adversely affect the gripping force. Furthermore, although the clip lever 6 must eventually be removed from the clip main body 4, this has the drawback of requiring a great deal of labor.

The present invention was proposed in order to solve the above-mentioned conventional drawbacks, and includes 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 a device for holding a film, etc., using a tenter clip, in which a clip lever is rotatably provided on each of the clip bodies installed above, a pressing device is provided in which a compression spring is installed in the outer cylinder between the clip lever and the clip body. The clip lever is detachably arranged so that the lower lever of the clip lever can pass between the clip bodies, and the lower lever comes into contact with the outer cylinder to stop rotation of the clip lever. It is an object of the present invention to provide a gripping device for film, etc. using a tenter clip.

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 4 to 8 show embodiments of the present invention, FIG. 4 is a partial sectional view of the film in the gripped state, and FIG. 5 is a partial sectional view of the film in the open state. Figure 6 is a perspective view of Figure 4, Figure 7 is a view of Figure 5.
The sectional view, FIG. 8, is a schematic plan view of the tenter (only the upper half is shown).

To explain the difference from the conventional one in FIGS. 4 to 8, reference numeral 21 denotes a clip lever, and a boss portion 2 rotatably supported on the clip lever support shaft 5.
2, brackets 23, 23 are provided protrudingly.
This bracket 23 is connected to the boss part 22 and the lower lever 2.
It protrudes from ribs 25, 25 (FIG. 6) connecting 4. Reference numeral 26 denotes a lightening hole, which is formed between the ribs 25 to reduce weight.

The noses 27, 27 are provided to protrude from the lower lever 24 as shown in FIG. 4, and prevent the ears 11a of the film 11 from bending upward as shown by the two-dot chain line in FIG. 28 is a contact portion formed between the noses 27 and 27, and a pressing device 3 to be described later.
The clip lever 21 is brought into contact with the outer cylinder 35 of the clip lever 21 as shown in FIG. 5 to restrict rotation of the clip lever 21.

In addition, as shown in FIG. 7, the width W _L of the lower lever 24 is
The inner distance W _C between the clip bodies 29, 29 is smaller than that, and the clip lever 21 can be used in both the film gripping state (Fig. 4) and the film opening state (Fig. 5).
The lower lever 24 is designed not to interfere with the clip main bodies 29, 29 when reciprocating between the clips shown in FIG.

The pressing device 30 has one end connected to the bracket 23,
23 via a spring pin 31, and the other end is supported by a bracket 33, 33 integral with the base 32 via a spring pin 34.
and a compression spring 36 loaded into the outer cylinder 35. In FIG. 4, when the film 11 is gripped and the clip lever 21 rotates from FIG. 4 to FIG. 5, after passing the dead center, the clip lever 21 is in the state shown in FIG. It is set up so that it can hold.

Further, the outer cylinder 35 has an elongated hole 37 into which the spring pin 31 is loosely fitted, a hole 38 into which the compression spring 36 is loaded, and a groove 39 into which the spring pin 34 comes into contact. Therefore, in FIG. 5, the clip lever 21 is rotated counterclockwise while pressing the outer cylinder 35 in the direction of arrow A against the compression spring 36 to disengage the concave groove 39 and the spring pin 34. Rotate to the position indicated by the two-dot chain line and press the edge 4.
0 maintenance work such as cleaning and inspection becomes possible. In addition,
According to the present invention, as shown in FIG. 8, the conventional wear rings 10a, 10b, clip closer 9b, and clip opener 9c in FIG. 3 are eliminated.

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 41 comes into contact with the clip opener 9a as shown in FIG.
1 rotates counterclockwise against the compression spring 36 of the pressing device 30 in FIG.
Release 1.

Next, the contact portion 28 of the lower lever 24 contacts the outer cylinder 35 of the pressing device 30 and stops in the state shown in FIG.
After passing the dead center by rotating clockwise around , the state shown in FIG. 5 is maintained to maintain the clip lever 21 in the open state. That is, the clip lever 21 is placed in the tenter 8 while maintaining a predetermined distance from the liner 7.
Return to the entrance.

Next, the film 11 is placed at the entrance of the tenter 8.
The case of grasping will be explained. Clip lever 21
When the lever member 41 of the clip lever 21 reaches the entrance portion while being held in the state shown in FIG. 5, it contacts the clip closer 9d and rotates clockwise against the pressing device 30, as shown in FIG. death,
As shown in FIG. 4, hold the film 11 and use the tenter 8.
You will be heading towards the exit.

Next, maintenance work such as cleaning and inspection of the edge 40 will be explained. In FIG. 5, the outer cylinder 35 is rotated counterclockwise while being pressed in the direction of arrow A against the compression spring 36, and the groove 39 and the spring pin 34 are disengaged to release the pressing device 30. state,
The clip lever 21 is rotated counterclockwise and moved to the position indicated by the two-dot chain line, and the edge 40 is turned upward to enable maintenance work. When the maintenance work is completed, the pressing device 30 is reinstalled by performing the reverse operation.

Since the present invention is configured as described above in detail, there is no contact between the edge of the clip lever and the liner without a film intervening,
This eliminates problems such as damage to the edges and extends the service life of the parts.

Further, the present invention makes the pressing device removable, and allows the lower lever of the clip lever to pass between the clip bodies, and also allows the lower lever to come into contact with the outer cylinder of the pressing device to stop rotation of the clip lever. Therefore, during steady operation, the lower lever can be brought into contact with the outer cylinder, the rotation of the clip lever can be stopped, and the open position of the clip lever can be maintained, which can be used when cleaning the edges of the clip lever, etc. By removing the pressing device from the clip body and flipping the clip lever in the opposite direction to the film nip direction so that the edge faces upward, maintenance work such as cleaning and inspecting the clip lever edge can be performed without disassembling the clip. It can be done easily. Furthermore, according to the present invention, clip closers, clip openers, and wear rings are no longer necessary.
The number of parts can be reduced. In addition, in the present invention, the mounting direction of the pressing device 30 may be reversed from that of the above embodiment, and the pressing device 30 may be mounted and removed on the spring pin 31 side.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a conventional tenter seen from a direction perpendicular to the film traveling direction, Fig. 2 is a perspective view of the tenter clip shown in Fig. 1, and Fig. 3 is a plan view schematically showing the tenter shown in Fig. 1. , FIG. 4 is a side sectional view showing a film gripping state of a tenter clip showing an embodiment of the present invention, FIG. 5 is a side sectional view showing the same film in an open state, and FIG. 7 is a sectional view of FIG. 5, and FIG. 8 is a plan view showing only the upper half of a tenter showing an embodiment of the present invention. Explanation of main parts of the diagram 5... Clip lever support shaft, 8... Tenter, 9a... Clip opener,
9d... Clip closer, 11... Film, 21
...Clip lever, 22...Boss part, 23...Bracket, 24...Lower lever, 28...Abutment part, 29...
Clip body, 30...pressing device, 31...spring pin, 32...base, 34...spring pin,
35...Outer cylinder, 36...Compression spring, 39...Concave groove.

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 gripping device for film, etc. using a tenter clip, a pressing device equipped with a compression spring in an outer cylinder is removably disposed between the clip lever and the clip body, and the lower lever of the clip lever is moved between the clip bodies. In addition to making it possible to pass through
A device for holding a film or the like using a tenter clip, characterized in that the lower lever is configured to come into contact with the outer cylinder and stop rotation of the clip lever.