JP3703127B2 - Clip closer suction device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a suction device for a clip closer, and in particular, the cutting powder generated from the wheel by the contact of the clip is discharged to the outside by the suction device so that the cutting powder does not adhere to the film that is conveyed and stretched. It relates to a new improvement.
[0002]
[Prior art]
As a clip closer for sandwiching a film in this type of film stretching apparatus that has been used in the past, a clip that is not shown is in contact with a fixedly arranged engaging means (for example, a wheel). The film is rotated and clamped on both sides of the film to guide the film into the stretching section of the stretching apparatus. The film is stretched by moving the position of the divergent clip while the film is heated.
[0003]
[Problems to be solved by the invention]
Since the clip closer in the conventional stretching apparatus is configured as described above, the following problems exist. That is, since the wheel as the engaging means is made of a material softer than the clip, for example, resin or aluminum, a part of the wheel is cut by the clip, and the generated cutting powder is scattered around and is applied to the film. Scattering cannot be avoided, and even when micron-sized cutting powder adheres to the film, it is often regarded as a defective product on the user side, and it is difficult to improve the yield of film stretching.
[0004]
The present invention has been made to solve the above-described problems, and in particular, a film that is conveyed and stretched by discharging cutting powder generated from the wheel by the contact of the clip to the outside by a suction device. An object of the present invention is to provide a clip closer suction device that prevents cutting powder from adhering to the surface.
[0005]
[Means for Solving the Problems]
The suction device for the clip closer according to the present invention is configured to move while holding the both sides of the film conveyed from the upstream side by the clip by rotating the clip moving from the upstream side by the engaging means of the fixed arrangement. The clip closer includes a wheel that forms the engaging means and has a tapered portion and that freely rotates, a cover that covers the wheel, and a suction duct that has a suction device connected to the cover. Cutting powder generated when contacting the wheel is discharged to the outside by the suction duct, the wheel is made of a material softer than the clip, and the cover is The box is formed and an opening is formed to expose a part of the clip. That.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a clip closer suction device according to the present invention will be described below with reference to the drawings.
1 is a film conveyed by a film conveying means (not shown) of a well-known transverse stretching apparatus, and both sides of the film 1 are used to sandwich both sides of the film 1. A large number of clips 2 (only one is shown in FIG. 2 but in practice a large number are provided on the endless chain 20 at a predetermined interval) are movable together with the endless chain 20 and rotatable via the shaft support 3. Is provided.
[0007]
As shown in FIGS. 2 to 4, a wheel 7 is provided at the upper position of each clip 2 as an engagement means held on the fixed portion 4 via a shaft 5 and a bearing 6 so as to be freely rotatable. It has been.
A tapered portion 7a is formed inside the wheel 7, and the wheel 7 itself is made of a softer material than the clip 2, for example, resin (for example, trade name Nylatron manufactured by Toray), aluminum, and the like. In the case of being cut and deformed by contact with the clip 2, the bolt 8 is removed so that it can be easily replaced.
[0008]
Around each wheel 7, for example, a cover 10 having a substantially box shape as a whole is connected and fixed to the fixing portion 4, and an opening 10 a formed in a part of the cover 10. Further, a part of the clip 2 or a part of the wheel 7 is operably exposed. The opening 10a is configured to be as small as possible so as to increase the air flow rate when suctioning.
[0009]
A suction duct 12 connected to a suction device 11 is connected to a lower position of the cover body 10, and an exhaust duct 13 of the suction device 11 is connected to the outside 15 of the building 14 so that the outside can be discharged. It is configured.
[0010]
In addition, although the case where the above-mentioned cover 10 and the suction device 11 were arrange | positioned 1 each on both sides of the film 1 was described, it is still effective if it provides as 2 pairs, 3 pairs, etc., without restricting to a pair structure. Yes, the suction device 11 is not provided individually, but a single large-sized device can be installed and shared by the covers 10.
[0011]
Next, the operation will be described. First, in the configuration of FIG. 1, when the film 1 is transported from the upstream side toward the downstream side along the film flow direction A, each film moves from the upstream side toward the downstream side in synchronization with the film 1. The film 2 is positioned between the clip 2 and the pedestal 2A. When the head of the clip 2 comes into contact with the tapered portion 7a of the fixedly arranged wheel 7, the clip 2 is a solid line from the posture shown by the chain line in FIG. The film 1 is sandwiched between the lower portion 2a of the clip 2 and the pedestal 2A, and the film 1 is forcibly expanded and stretched while being heated.
[0012]
When the clip 2 abuts against the tapered portion 7a of the wheel 7, the wheel 7 freely rotates, but the taper portion 7a is cut by the clip 2 by the contact at that time, and cutting powder is generated. Is discharged to the outside 15 by the suction duct 12 by the suction force of the suction device 11.
In this case, since the opening 10a is formed as small as possible, the flow rate of the air flow is maximized, cutting powder is sucked completely and quickly, and adhesion of the cutting powder to the film 1 is almost completely prevented. Can do. Further, at the time of the above-described suction operation, as shown in FIG. 3, the head of the clip 2 sequentially moves with respect to the cover body 10, so that an air flow is generated along with the movement of the clip 2. A synergistic effect can be exhibited during the suction operation.
[0013]
【The invention's effect】
Since the clip closer suction device according to the present invention is configured as described above, the following effects can be obtained. In other words, the cutting powder generated when the clip comes into contact with the wheel is effectively discharged to the outside by the cover provided around the wheel and the suction duct, and the cutting powder adhering to the stretched film is almost completely removed. The yield of stretched film can be greatly improved.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram showing a suction device for a clip closer according to the present invention.
FIG. 2 is an enlarged cross-sectional view showing a main part of FIG.
FIG. 3 is an explanatory diagram showing a relationship between the cover body and the clip in FIG. 1;
4 is an enlarged cross-sectional view showing a main part of FIG. 1;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Film 2 Clip 7 Wheel 7a Tapered part 10 Cover body 10a Opening 11 Suction device 12 Suction duct

Claims (3)

The clip (2) moving from the upstream side is rotated by the fixedly arranged engaging means so as to move while holding the both sides of the film (1) conveyed from the upstream side by the clip (2). In the clip closer, the engagement means is provided, the wheel (7) having a tapered portion (7a) and freely rotating, the cover (10) covering the wheel (7), and connected to the cover (10). A suction duct (12) having a suction device (11), and cutting powder generated when the clip (2) contacts the wheel (7) is discharged to the outside by the suction duct (12). A clip closer suction device characterized by comprising. The suction device for a clip closer according to claim 1, wherein the wheel (7) is made of a material softer than the clip (2). The clip according to claim 1 or 2, wherein the cover (10) has a box shape and is formed with an opening (10a) for allowing a part of the clip (2) to face. Closer suction device.

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