JPS6244426A - Lateral stretching machine - Google Patents

Abstract

PURPOSE:To obtain a high-quality film which has neither friction nor noise on a clip lever, clip closer and clip opener, by making the clip lever rock through repulsive force of a magnet. CONSTITUTION:A clip lever 10 of a circulating clip body 16 is turned by repulsive force of a permanent magnet 14 stuck to a clip closer 11 at an inlet part of a lateral stretching machine and a permanent magnet 13 of the lip lever 10, and a holding state of a film 8 is held by a mechanism such as a spring built in the clip body 16. When the clip body 16 held the film 8 is advanced toward an outlet of the lateral stretching machine, the permanent magnet 13 is faced on a permanent magnet 15 of a clip opener 12, and the clip lever 10 is turned in the opposite direction to the inlet part by the repulsive force to hold the film 8 by a mechanism built in the clip body 16 under a released state of the film. Meantime, the film 8 is stretched laterally and turned into a product.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention is applicable to biaxially stretched film manufacturing equipment, transverse-axial stretching equipment, etc., for producing strips such as films, sheets, webs, cloth, etc. (hereinafter referred to as films). The present invention relates to a transverse stretching machine that stretches paper in the width direction.

(Prior Art) FIGS. 5 to 8 show the gripping state of a film and the operating state of the closer and opener relative to the chestnut knob lever in a conventional horizontal stretching machine.

In the figure, reference numeral 1 denotes a clip main body, which has a symmetrical shape and is mounted on the clip stand 3 facing left and right, as shown in FIG. 5, in order to grip the film 8 and stretch it in the width direction. It is arranged so that it can move freely. The clip body 1 incorporates a mechanism including a lip lever 2 for self-holding the respective state of gripping or releasing the film 8 so that, for example, a spring force acts beyond the put point. Here, the clip lever 2 grips or releases the film 8 by swinging, and the contact surface of the film 8 has a claw shape or a special groove shape. The clip table 3 moves at a predetermined speed along the rail 4 from the entrance to the exit of the transverse stretching machine, turns 180 degrees at the exit, and returns to the entrance to support the crimp body 1. It has become one.

The rails 4 have a concave cross section and are arranged endlessly in order to circulate the clip table 3 from the inlet to the outlet of the transverse stretching machine, and further from the outlet to the inlet. Since the rail 4 slides between the clip base 3 and the clip base 3, a wear plate (not shown) is extended on the sliding surface with the clip base 3.

5 is a clip closer, which is installed at the inlet of the transverse stretching machine, and when gripping the film 8, it comes into contact with the cuff cutter 2, and the clip closer is attached to a rotatable guide disk, wear plate, lock nut, adjustment bolt, air cylinder, etc. configured. Reference numeral 6 denotes a clip opener, which is provided at the outlet of the transverse stretching machine. This consists of a rotatable guide disk that abuts the clip lever 2 when the film 8 is released from the clip body 1. 7 is a roller link, and the clip body 1
It is composed of an endless chain that connects adjacent clip stands 3 in order to move the clips.

To describe the operation of the conventional transverse stretching machine having the above configuration, the rotatable lip closer 5 contacts the head of the clip lever 2 of the circulating clip body 1 from the inside at the inlet of the transverse stretching machine. Then, by rotating the clip lever 2 and operating it as shown from three points onwards in FIG. 6, the clip body 1 grips the film 8 in sequence. Thereafter, the gap between the opposing clip bodies 1 widens as the film progresses, guided by the rails 4, and the film 8 is stretched laterally.

At the outlet of the transverse stretching machine, the clip lever 2 of the clip main body 1 is rotated so that the lip opener 6 circulates.
By making contact with the head of the lever from the outside and rotating the lever 2, the lever 2 is operated as shown from point 5 onwards in FIG.
The clip body 1 sequentially releases the film 8. after that,
The clip main body 1 is guided by the rail 4, changes its direction of travel, then turns 180 degrees and returns to the entrance.

The film 8 released from the clip body 1 by the clip opener 6 passes through a take-up machine (not shown) in the next step, and is wound into a roll by a winding fi (not shown) to become a product.

The film 8 thus supplied to the transverse stretching machine is continuously transversely stretched and taken to the next step.

By the way, in the above conventional horizontal stretching machine, in order for the clip body 1 to grip (release) the film 8, the clip lever 2 is moved between the clip closer 5 and the clip opener 6.
In this case, (11 clip lever 2 and clip closer 5)
(Clip opener 6) was severely worn, and (2) noise caused by contact between clip lever 2 and clip closer 5 (clip opener 6) was significant.

In order to avoid these problems, it is necessary to select wear-resistant materials for the clip lever 2, clip closer 5, and clip opener 6, or to select special materials that are less likely to generate noise. Maintenance management was complicated.

Furthermore, when manufacturing condenser films, video/audio films, or vapor-deposited films that are sensitive to dust,
In some cases, abrasion powder due to contact abrasion of the clip lever 2, clip closer 5, and clip opener 6 adheres to the film, making it impossible to use the film as a product.

(Problems to be Solved by the Invention) As described above, in the conventional horizontal stretching machine of this type, the wear between the clip lever and the clip closer (opener) is severe, maintenance management is complicated, and noise is generated. There were other problems, such as the occurrence of abrasion particles, which significantly worsened the working environment, and in addition, the abrasion powder generated during the abrasion had an adverse effect on quality.

The present invention has been made in view of these problems, and aims to provide a transverse stretching machine that allows the clip lever to be operated smoothly and reliably without mechanical operation. be.

(Means for Solving the Problems) For this reason, the present invention provides a horizontal stretching machine that grips both edges of a band-shaped body such as a film and continuously stretches it horizontally in the width direction.
A clip body that grips or releases a strip and maintains its state by itself, a clip lever that is swingably attached to the clip body and has a permanent magnet fixed to the top thereof, and a magnetic pole that repels the permanent magnet. clip closer with
and a clip opener, and the swinging of the clip lever is driven by a magnetic repulsive force to grip or release the band-shaped body, and this is a means for solving the above problem. It is something.

(Function) Since the clip lever and the clip closer (clip opener) are each equipped with magnets that emit opposite magnets, the clip lever swings without contacting the clip closer (clip opener) (performed by magnetic repulsion). As a result, the wear of the clip lever, clip closer, and clip opener is eliminated, and at the same time, noise is eliminated.

(Example) Examples of the present invention will be described below with reference to the drawings. Figures 1 to 4 show the clip mechanism of the transverse stretching machine of this embodiment and the operating state when the clip lever is gripped and released.
The explanation will focus on the differences from the conventional one shown in the figure.

Reference numeral 10 denotes a clip lever having a permanent magnet 13 fixed to its top, and its shape etc. are the same as the conventional one. Reference numeral 11 denotes a clip closer, which is disposed at the entrance of the transverse stretching machine, and which connects the permanent magnet 13 at the top of the clip lever 10 and the film 8.
It is a plate body consisting of a substantially sector-shaped part with a permanent magnet 14 fixedly attached to opposite ends thereof, and a linear part following the sector-shaped part. A pair of clip closers 11 are arranged with their backs facing each other in the width direction of the film 8, and the distance between the opposing straight portions is 1. is adjustable from the outside.

Reference numeral 12 denotes a clip opener, which is disposed at the outlet of the transverse stretching machine and is made of a fan-shaped plate with a permanent magnet 15 fixed to an arcuate portion facing the top permanent magnet 13 of the clip lever 10 on the outside of the film 8; The sector plate is mounted on a rotating disc 17, which corresponds to a conventional clip opener.

This disk 17 has a pair of opposing clip openers 12.
It is fixedly installed so that the interval 12 between the arcuate surfaces can be adjusted from the outside.

A permanent magnet 13 fixed to the clip lever 10, a clip closer 11, and a clip opener are connected to each other.
The permanent magnets 14 and 15 fixed to the magnets 12 and 12 are configured to emit light in opposition to each other.

Next, its effect will be explained. The clip lever 10 of the clip main body 16 which circulates in the same way as in the past is rotated by the repulsive force between the permanent magnet 14 fixed to the clip closer 11 and the permanent magnet 13 of the clip lever 10 at the entrance of the transverse stretching machine. The grip state of the film 8 is maintained by a mechanism such as a spring (not shown) built into the clip body 16. When the clip main body 16 holding the film 8 moves toward the exit of the transverse stretching machine, the permanent magnet 13 of the clip lever 10 moves into the permanent magnet 15 of the clip opener 12.
The clip lever 10 is rotated in the opposite direction to the entrance part by the repulsive force of the other magnet, and the clip main body 1
The film 8 is held in an open state by the mechanism (not shown) incorporated in the film 6. During this time, the film 8 is laterally stretched and manufactured into a product in the same manner as in the past.

Incidentally, when the rotational resistance of the clip lever 10 becomes excessive for some reason and becomes larger than the repulsive force of the magnet described above, the disc 17 comes into contact with the clip lever 10 and actively rotates as in the conventional clip opener. Rotate. Therefore, contact between the clip lever 10 and the permanent magnets 13, 15 fixed to the clip opener 12 is avoided even due to the aforementioned unexpected factors. In the illustrated embodiment, the clip closer 11
Although the magnets fixed to the clip opener 12 and 12 are shown as permanent magnets 14 and 15, it is also possible to replace them with electromagnets.

Regarding the magnets described above, the following points need to be taken into consideration.

(1) Prevent magnetic leakage.

(2) Increase the strength of the magnetic field to increase the repulsive force.

(3) Prevents magnetization from changing over time and does not weaken repulsive force even after long-term use.

Here, if the magnetic repulsion is sufficiently large, the disk 1
It will be understood that a structure may be created in which 7 is omitted. Further, depending on design conditions such as when the operating speed is high, it is also possible to attach a member equivalent to the disc 17 to the clip closer 11.

(Effects of the Invention) As described in detail above, according to the present invention, the clip lever is oscillated by the repulsive force of the magnet, so that the wear of the clip lever, clip closer, and clip opener can be completely prevented. Since there is no contact with each other, noise is eliminated. Furthermore, there is no generation of abrasion particles due to contact, and a clean condition can be maintained.
A high quality film will be obtained.

[Brief explanation of drawings]

FIG. 1 is a partial vertical sectional view showing the film gripping situation at the inlet of a transverse stretching machine according to an embodiment of the present invention, and FIG.
Figure 3 is a partial vertical cross-sectional view showing the state of film release at the outlet of a transverse stretching machine according to an embodiment of the present invention; The figure is a partial front view showing the film gripping situation at the inlet of a conventional horizontal stretching machine, Figure 6 is a view from the ■ arrow in Figure 5, and Figure 7 shows the film release situation at the exit of a conventional horizontal stretching machine. The partial vertical cross-sectional view shown in FIG.
It is a view in the direction of the ■ arrow in the figure. Explanation of main parts of the figure 4 - Rail 8 - Film 10 - Clip lever 11 - Clip closer 12 - Clip opener 13 - Permanent magnet 14.15 - Permanent magnet 16 - Clip body Patent applicant Mitsubishi Heavy Industries Co., Ltd. Figure 5 ↓ ■ Figure 6

Claims (1)

[Claims] A transverse stretching machine that grips both ends of a band-like object such as a film and continuously stretches it horizontally in the width direction includes a clip body that grips or releases the band-like object and maintains the state by itself, and a swinging body for the clip body. The clip lever includes a clip lever that is movably mounted and has a permanent magnet fixed to the top thereof, and a clip closer and a clip opener that have magnetic poles that repel the permanent magnet, and the swinging of the clip lever is caused by magnetic repulsion. 1. A transverse stretching machine, which is driven by a lateral stretching machine to grip or release the above-mentioned strip-shaped body.