JPH07137715A - Packing of coil - Google Patents

Abstract

PURPOSE:To eliminate the work of tucking down the edges from the packing operation, improve the working efficiency, and enable automating the packing operation by a method wherein a coil is placed inside a PVC bag, which is vacuumized by a vacuum pump. CONSTITUTION:The upper end of a PVC bag 1 is gripped by a plurality of clip hands 3 and inside this PVC bag 1 a coil 2 is placed by the use of a handling crane 13; the coil, put inside the bag, is placed on a coil stand 11. After the release of the coil from the handling crane 13, the tip of a vacuumizing tube 6 is inserted into the PVC bag 1 through its opening 1b and the opening 1b is gathered together by the use of a band and closed. When a vacuum is produced inside the PVC bag 1 by a vacuum pump, a projecting part 1a of the PVC bag 1 moves into the inside hole 2a of the coil 2 and the PVC bag 1 tightly covers the inner circular side as well as the circumferential side and the two lateral sides of the coil 2. The tube 6 and the band are lifted and the opening of the bag is closed tight by fusion under heat by the use of a fusion- adhesion pad 8. The coil 2 is packed under hermetic seal in the PVC bag 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coiled article, for example, a metal strip coil (hereinafter also referred to as a "roll") in which a metal strip is wound in a coil and which has an inner hole of a predetermined diameter along its axis. The same shall apply hereinafter).

[0002]

2. Description of the Related Art For example, a metal strip coil having an inner hole of a predetermined diameter along its axis has conventionally been wrapped around its outer peripheral surface, both side surfaces and the inner peripheral surface of the inner hole to prevent rust during shipping or storage. It was necessary to wrap it in paper.

The conventional wrapping of coils with wrapping paper has been performed as follows. 6 to 10 are perspective views showing an example of a conventional coil packaging process. That is, first, FIG.
As shown in, a tubular wrapping paper 14 (inner peripheral paper) is attached to the inner peripheral surface of the inner hole 2a of the coil 2 by taping, and then,
As shown in FIGS. 7 and 8, a wrapping paper 14 (peripheral paper) having a paper width capable of simultaneously wrapping the outer peripheral surface and both side surfaces of the coil 2 is wrapped around the outer peripheral surface of the coil 2, and then, as shown in FIG. Both side edges of the wrapping paper 14 are edge-folded along the both side surfaces of the coil 2 (14a is an edge fold portion) to fix the folded edges with taping,
Then, as shown in FIG.
Insert and fix it at both ends of the inner hole.

However, the above-described work is complicated and heavy on the operator and mechanized because the wrapping paper having a width sufficient to cover the outer peripheral surface and both side surfaces of the coil at the same time is supplied as one piece. There was a problem that it was difficult.

In order to reduce the load of the above coil packaging work,
A technique for separately wrapping wrapping paper or wrapping material on the outer peripheral surface of the coil, both side surfaces and the inner peripheral surface of the coil inner hole is disclosed in Japanese Patent Laid-Open No. 56-1.
It is disclosed in Japanese Patent No. 06719 (hereinafter referred to as "Prior Art 1") and Japanese Utility Model Publication No. 4-121285 (hereinafter referred to as "Prior Art 2").

[0006]

However, even with the techniques disclosed in the prior arts 1 and 2, it is not possible to eliminate the ear folding work of the coil packaging, and it cannot be said that the work efficiency is improved.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a coil wrapping method which can eliminate the conventional folding operation of the coil wrapping, improve the work efficiency, and enable the automation of the wrapping.

[0008]

The present invention has an opening having a size such that a coil having an inner hole can be loaded, and a convex portion capable of covering the inner peripheral surface of the inner hole. Also, using a vinyl bag capable of encapsulating the coil, the coil is placed in the vinyl bag, then a tube connected to a vacuum pump is inserted into the opening of the vinyl bag, and then the tube Is closed, and then the air inside the vinyl bag is sucked by the vacuum pump so that the inside of the vinyl bag is evacuated by the vacuum pump, and the outer peripheral surface, both side surfaces and the inner hole of the coil are inserted. It is characterized in that the vinyl bag is adhered to the inner peripheral surface of, and then the tube is removed, and immediately after that, the opening is heat-fused and hermetically sealed.

[0009]

In the method of the present invention, a packaging plastic bag having a convex portion is used, the coil is covered with the plastic bag, and the tube connected to the vacuum pump is inserted into the opening of the plastic bag to close it. However, by suctioning the inside of the vinyl bag to create a vacuum (hereinafter referred to as "vacuum evacuation"), the convex part of the vinyl bag automatically adheres to the inner peripheral surface of the coil inner hole. There is no need for the work of folding the wrapping paper, folding it into the inner hole of the coil, and fixing the tape. Since the conventional ear side folding operation on the side surface of the coil is a complicated and difficult process, it is impossible to perform automatic packaging. However, according to the present invention, since the above operation is unnecessary, automatic coil packaging is possible.

After the inside of the vinyl bag is evacuated and brought into close contact with the peripheral surfaces of the coil, the opening of the vinyl bag is heat-sealed and sealed by a welding pad, so that the rust prevention effect of the coil is high.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described based on the embodiments shown in the drawings. 1 to 5 are front views showing one embodiment of the packaging step of the method of the present invention. As shown in FIG. 1, a vinyl bag 1 for coil wrapping has an opening 1b having a size capable of loading a metal coil 2 on the upper side, and two wraps on both sides of an intermediate portion.
It has two convex portions 1a and 1a.

The coil packaging process is as follows. The upper end of the vinyl bag 1 is gripped by a plurality of clip hands 3 provided on the upper frame 4 that constitutes the main body of the coil packaging device, and is placed above the coil receiving base 11. Next, the coil 2 is transferred by the handling crane 13, the coil 2 is loaded into the vinyl bag 1 to be wrapped therein, and then placed on the coil receiving base 11.

Then, as shown in FIG. 2, after removing the handling crane 13 from the coil 2 and moving it, the tip of the evacuation tube 6 connected to the vacuum pump 5 provided in the upper frame 4 is attached to a vinyl bag. 1 into the opening 1b. Then, the band 7 for narrowing down provided on the upper frame 4 is sent out.

Next, as shown in FIG. 3, after closing the opening 1b by closing the opening 1b with the band 7, the vacuum pump 5 is driven to start sucking (vacuating) the vinyl bag 1. As a result, the convex portions 1a, 1a of the plastic bag 1 become the inner holes 2a of the coil 2.
Moves toward the center of the inner part of the inner surface of the inner wall of the inner wall and adheres to the inner peripheral surface thereof to cover the inner peripheral surface. At the same time, the vinyl bag 1 also comes into close contact with the outer peripheral surface and both side surfaces of the coil 2.

When the evacuation is completed, the tube 6 and the band 7 are pulled up, and immediately, as shown in FIG. 4, the opening 1b is heated and fused by the fusion pad 8 provided on the lower frame 9. Seal tightly. As a result, the coil 2 is hermetically wrapped in the vinyl bag 1.

Further, the vinyl bag 1 in the coil inner hole 2a is heat-sealed, and at the portion where the convex portions 1a, 1a are in close contact with each other, the position 10 (hereinafter referred to as "vacuum sealing off point") is the limit at which the vacuum state is not broken 5), unnecessary parts of the vinyl bag 1 are cut out using a cutter 12 provided on the lower frame 9 and penetrate the inner hole 2a.

The heat fusion in the coil inner hole 2a and the cutting work by the cutter 12 are not always necessary when using a tong such as the C hook and the handling crane 13. That is, in the next step, when the coil 2 is handled and transferred by a wire, or when a band is hung through the inner hole 2a, it may be carried out as necessary when the vinyl bag in the inner hole 2a interferes. .

Further, the band 7 for narrowing down is not always used. That is, if the clip hand 3 holding the vinyl bag 1 without using the band 7 is moved in the width direction of the coil 2 to close the opening 1b of the vinyl bag 1 in which the tube 6 is inserted, the clip hand 3 can be sealed. The vacuuming may be performed without using the band 7. In this case, it is important to ensure the sealing property of the opening 1b closed by the clip hand 3 and the tube 6.

[0019]

As described above, according to the present invention, since the coil can be vacuum-packed using the vinyl bag, the ear folding work and the coil inner hole at the time of packaging the side surface of the coil can be performed. The problems associated with the peripheral surface packaging work can be solved, the efficiency of coil packaging can be improved, and packaging automation can be achieved, thus providing industrially useful effects.

[Brief description of drawings]

FIG. 1 is a front view showing one embodiment of a coil wrapping process of the present invention.

FIG. 2 is a front view showing one embodiment of the coil packaging process of the present invention.

FIG. 3 is a front view showing one embodiment of the coil packaging process of the present invention.

FIG. 4 is a front view showing one embodiment of the coil packaging process of the present invention.

FIG. 5 is a front view showing one embodiment of the coil packaging process of the present invention.

FIG. 6 is a perspective view showing an example of a conventional coil packaging process.

FIG. 7 is a perspective view showing an example of a conventional coil packaging process.

FIG. 8 is a perspective view showing an example of a conventional coil packaging process.

FIG. 9 is a perspective view showing an example of a conventional coil packaging process.

FIG. 10 is a perspective view showing an example of a conventional coil packaging process.

[Explanation of symbols]

 1 Vinyl bag 1a Convex part 1b Opening 2 Metal coil 3 Clip hand 4 Upper frame of coil wrapping machine body 5 Vacuum pump 6 Tube 7 Band 8 Bonding pad 9 Lower frame of coil wrapping machine body 10 Vacuum seal cutting point 11 Coil cradle 12 Cutter 13 Handling crane 14 Wrapping paper 14a Edge fold 15 Internal ring

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Keiaki Nishina 1-1-2 Marunouchi, Chiyoda-ku, Tokyo Nihon Steel Pipe Co., Ltd.

Claims (1)

[Claims] 1. A coil having an inner hole, the opening having a size capable of loading a coil, a convex portion capable of covering the inner peripheral surface of the inner hole, and capable of encapsulating the coil. Using a plastic bag, place the coil in the plastic bag, then
A tube connected to a vacuum pump is inserted into the opening of the vinyl bag, then the opening is closed while the tube is inserted, and then the inside of the vinyl bag is evacuated by the vacuum pump. Therefore, the air in the vinyl bag is sucked to bring the vinyl bag into close contact with the outer peripheral surface, both side surfaces of the coil and the inner peripheral surface of the inner hole, and then the tube is removed and immediately the opening is heated. A coil wrapping method characterized by fusion and sealing.