JPH0939907A - Packing method for metal sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packing method for metal sheets, wherein the packing cost is low, a rust-preventing effect is excellent and waste packing materials are reusable. SOLUTION: A plurality of metal sheets S are stacked in the form of a rectangular parallelopiped, and four-side faces of a body of the stacked metal sheets S are wrapped with kraft paper 10 impregnated with a volatile corrosion inhibitor. Further, the body of the stacked metal sheets S is wrapped with a polyethylene film 11 so as to cover the outside of the kraft paper 10. After placing a protective plate 7 on the uppermost face of the body thus wrapped, corner angles 12, each having a length corresponding to that of each side of the body, are applied to four sides of the upper face side as well as of the lower face side of the body. In this state, the body is wound around with steel bands from the outside of these corner angles 12, an air layer 13 is formed between the stacked metal sheets S and the kraft paper 10, and an air layer 14 is formed between the kraft paper 10 and the polyethylene film 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for packing a metal sheet, which is a sheet-like metal plate such as a tin plate or a tin-free steel cutting plate, and particularly to a low cost, excellent rust preventive effect, and a waste material. It is also made possible to reuse.

[0002]

2. Description of the Related Art In general, in order to pack a plurality of metal sheets in a lot, a packing sheet satisfying both rustproof and waterproof properties is used. Specifically, as such a packaging sheet, for example, as shown in FIG. 4, a waterproof polyethylene film (PE film) 3 is attached to the surface of a rustproof paper 2 impregnated with a vaporizable rustproofing agent. PE laminated rust preventive paper 1 and the like are used. By the way, the thickness of the PE film 3 is about 20 μm, and the weight of the paper used for the rustproof paper 2 is 80 to 100 g / m 2.
^{About 2} kraft papers were common.

Then, as shown in FIG. 5 (a), a plurality of metal sheets S are stacked in a rectangular parallelepiped shape on a seat plate 4 having a foot member 5 fixed to the back side thereof, and then FIG. 5 (b). As shown in, the PE laminated rustproof paper 1 is wound around the four sides of the metal sheet S. In this case, PE laminated rustproof paper 1
Has a width that covers the four side surfaces of the metal sheet S and the seat plate 4 and that extends further upward from the upper surface of the uppermost metal sheet S, and the portion protruding upward from the upper surface of the metal sheet S is inward. It is folded down so as to cover the edge portion of the upper surface of the uppermost metal sheet S.

At the lower end of the PE laminated rust preventive paper 1, a kraft tape 6 is wound along the lower end, and the kraft tape 6 is folded on the back side of the seat plate 4 and attached to the back side thereof to form a seat plate. Fix at 4. FIG.
As shown in FIG. 3, the portion of the foot member 5 on the side of the seat plate 4 at the end in the longitudinal direction is notched so that the kraft tape 6 does not interfere with the attachment of the craft tape 6 to the back surface of the seat plate 4.

Finally, the protective plate 7 is placed on the uppermost surface as shown in FIG. 6, and then an iron band 8 is appropriately wound as shown in FIG. 5 (c). A corner angle 9 is provided inside the bent portion of the iron band 8 in order to prevent damage to the metal sheet S. Further, the iron band 8 wound in the direction orthogonal to the foot 5 passes through the above-mentioned notched portion of the foot 5.

Another conventional technique is disclosed in Japanese Unexamined Patent Publication No.
Some of them are disclosed in Japanese Patent No. 278757. In the technique described in this publication, the cardboard is bent in advance into a box shape in accordance with the shape of the stacked metal sheets S, and the box-shaped cardboard is put over the cardboard to improve work efficiency at the site. ing.

[0007]

However, in the conventional method of winding the PE laminated rust preventive paper 1 as described above by bundling it, if the PE laminated rust preventive paper 1 is torn after packing, the metal sheet S is It has a drawback that it is exposed to the outside air immediately and its anticorrosive power is extremely reduced. Further, since the PE laminated rustproof paper 1 as a waste material after unpacking is integrated with the PE film 3, there is a problem that it cannot be reused or recycled as a resource.

On the other hand, in the conventional technique disclosed in the above publication, the shape of the stacked metal sheets S changes due to changes in the plane dimensions of the metal sheets S and the number of sheets in one lot. However, in order to prevent the operation from being delayed, it is necessary to form boxes of various sizes in advance, which results in a significant increase in cost. The present invention has been made by paying attention to the problems that such conventional techniques have, and a method of packing a metal sheet that is low in cost, has an excellent rust preventive effect, and enables reuse of waste materials. It is intended to be provided.

[0009]

In order to achieve the above object, the invention according to claim 1 is a method for packing a plurality of stacked metal sheets, wherein the stacked metal sheets are protected from vaporization. After covering with rustproofing paper impregnated with a rusting agent, the outside of the rustproofing paper is covered with a waterproof sheet, and further, between the metal sheet and the rustproofing paper, and between the rustproofing paper and the waterproof sheet. An air layer was formed in each.

The invention according to claim 2 is, in the invention according to claim 1, characterized in that, after the outside of the rust-proof paper is covered with the waterproof sheet, the four sides on the upper surface side and the four sides on the lower surface side are formed on the respective sides. We decided to wrap the band with the corner angle corresponding to the length of the band. In the invention according to claim 3, in the invention according to claim 1 or claim 2, a heat-shrinkable sheet is used as the waterproof sheet.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 are views showing an embodiment of the present invention, and FIG. 1 is a view showing a packing procedure of metal sheets S in the present embodiment. It should be noted that the same members and the like as those of the above-described conventional technique are denoted by the same reference numerals.

That is, also in the present embodiment, first, as shown in FIG. 1A, a plurality of metal sheets S are placed on the seat plate 4 having the foot member 5 fixed to the back side thereof, and a rectangular parallelepiped. Pile up in a shape. Next, as shown in FIG. 1B, the kraft paper 10 as rust preventive paper impregnated with the vaporizable rust preventive agent is wound around the four side surfaces of the stacked metal sheets S. Also in this case, the kraft paper 10 covers the four side surfaces of the metal sheet S and the seat plate 4 and has a width that extends further upward from the upper surface of the uppermost metal sheet S. The portion protruding upward is folded inward so as to cover the edge portion of the upper surface of the uppermost metal sheet S.

Further, a polyethylene film 11 as a waterproof sheet is wrapped around the kraft paper 10 so as to cover the outside thereof. In addition, such a polyethylene film 11
Has a width such that it extends further upward from the upper surface of the uppermost metal sheet S and further downward than the back surface of the seat plate 4, and the portion protruding upward from the upper surface of the metal sheet S and the seat plate The portion protruding downward from the back surface is folded inward to cover the edge portion of the upper surface of the uppermost metal sheet S and the edge portion of the back surface of the seat plate.

Instead of the polyethylene film 11, a polyethylene shrink film 11A as a heat-shrinkable sheet may be used. In that case, the polyethylene shrink film 11A may be wound in a cylinder and then retained in an oven at a predetermined temperature. As shown in FIG. 1C, a portion protruding upward from the upper surface of the metal sheet S (similarly to a portion protruding downward from the back surface of the seat plate) covers an edge portion of the upper surface of the uppermost metal sheet S. As a result, work efficiency is improved.

After placing the protective plate 7 on the uppermost surface as in the conventional case, as shown in FIG. 2 which is a perspective view of the completed packaging, the four sides on the upper surface side and the four sides on the lower surface side are long. The iron band 8 is wound from the outside of the corner angles 12 with the corner angles 12 corresponding to the height applied. The protective plate 7 may be a defective product or the like generated when the metal sheet S is sheared, and the protective plate 7 does not need to be sheared.

It is preferable that the lengths of the corner angles 12 match the lengths of the sides to which they are applied, but this does not need to be exactly the same, and the length of the sides is actually aimed at the minus tolerance side. However, it may be within a range of about −0 to −10 mm. Then, since the corner angles 12 are pressed against the four sides on the upper surface side and the four sides on the lower surface side, the airtightness of the space inside the polyethylene film 11 becomes high, and a cross-sectional view showing the packed state of the metal sheet S (however, , Band 8 is omitted.) As shown in FIG. 3, the air layer 1 is provided between the metal sheet S and the kraft paper 10.
3 is formed, and the air layer 14 is formed between the kraft paper 10 and the polyethylene film 11. The air layers 13 and 14 are filled with the anticorrosive agent vaporized from the kraft paper 10, and the metal sheet S Rust is prevented. Even when the polyethylene shrink film 11A is used in place of the polyethylene film 11, air remains inside the polyethylene shrink film 11A and the kraft paper 10 during heat shrinkage, so that the air layers 13 and 14 are formed. It

Then, in this way, the double air layers 13, 1
With the structure in which 4 is formed, even if the polyethylene film 11 is torn, the air layer 13 is kept sealed as long as the kraft paper 10 is not torn. There is no such thing. Moreover, since the kraft paper 10 and the polyethylene film 11 are formed as separate sheet members and the air layer 14 is formed without adhering between them, there is a possibility that both the polyethylene film 11 and the kraft paper 10 are torn. However, it is extremely smaller than the case where these are integrated as in the conventional case.

If the kraft paper 10 and the polyethylene film 11 are separate sheet members, there is an advantage that the kraft paper 10 can be easily reused and recycled as a resource after unpacking. further,
With the packing method as in the present embodiment, it is possible to deal with a change in the size of the object to be packed simply by preparing several kinds of corner angles 12. There is no significant cost increase.

[0019]

As described above, according to the present invention,
As a double air layer is formed around the metal sheet,
Since the metal sheet is covered with rust-proof paper and waterproof sheet, the possibility that the rust-preventing power will suddenly decrease without causing a significant increase in cost is reduced, and the waste material can be reused. There is an effect.

In particular, the invention according to claim 3 has the effect of improving the efficiency of the packing work in addition to the above effects.

[Brief description of drawings]

FIG. 1 is a diagram showing a packing procedure according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a state in which packing is completed in the embodiment.

FIG. 3 is a partial cross-sectional view showing a packed state.

FIG. 4 is a cross-sectional view of a conventionally used packaging sheet.

FIG. 5 is a diagram showing a conventional packing procedure.

FIG. 6 is a cross-sectional view showing a conventional packaging state.

[Explanation of symbols]

4 Seat plate 5 Foot material 7 Protective plate 8 Band 10 Kraft paper (anti-rust paper) 11 Polyethylene film (waterproof sheet) 11A Polyethylene shrink film (heat shrinkable sheet) 12 Corner angle 13, 14 Air layer

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Shigeki Taniguchi 1 Kawasaki-cho, Chuo-ku, Chiba, Chiba Kawasaki Steel Co., Ltd. Chiba Works (72) Inventor Norihiro Okawa Kawasaki-cho, Chuo-ku, Chiba Chiba Prefecture Kawasaki (72) Inventor, Kazuhisa Hamakami, Kawasaki-machi, Chuo-ku, Chiba, Chiba Prefecture Kawasaki Steel Co., Ltd., Chiba Works

Claims (3)

[Claims] 1. A method of packing a plurality of stacked metal sheets, wherein the stacked metal sheets are covered with rust-proof paper impregnated with a vaporizable rust preventive agent, and then the outside of the rust-proof paper. Is covered with a waterproof sheet, and further, an air layer is formed between each of the metal sheet and the rustproof paper and between the rustproof paper and the waterproof sheet. Packing method. 2. The band is wound after the outer side of the rustproof paper is covered with the waterproof sheet, and the four sides on the upper surface side and the four sides on the lower surface side are provided with corner angles corresponding to the lengths of the respective sides. Item 1. A method for packaging a metal sheet according to item 1. 3. The method of packing a metal sheet according to claim 1, wherein a heat-shrinkable sheet is used as the waterproof sheet.