JP2866033B2 - How to pack metal sheets - Google Patents

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-shaped metal plate such as a tin plate or a tin-free steel cut plate, and more particularly to a low cost, excellent rust prevention effect and 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 for each lot, a packing sheet that satisfies both the rustproof property and the waterproof property is used. Specifically, as shown in FIG. 4, for example, a waterproof polyethylene film (PE film) 3 is attached to the surface of a rustproof paper 2 impregnated with a vaporizable rust preventive as such a packing sheet. And the like are used. Incidentally, the film thickness of the PE film 3 is about 20 μm, and the paper used for the rust-proof paper 2 weighs 80 to 100 g / m.
^{About two} kraft papers were common.

[0005] Then, as shown in FIG. 5 (a), a plurality of metal sheets S are stacked in a rectangular parallelepiped on a seat plate 4 to which foot members 5 are fixed on the back side, and then, FIG. As shown in the figure, PE-laminated rust-proof paper 1 is wound around four sides of the metal sheet S. In this case, PE laminated rust-proof paper 1
Has a width that covers the metal sheet S and the four side surfaces of the seat plate 4 and further extends from the upper surface of the uppermost metal sheet S to the upper side. The metal sheet S is folded over so as to cover the edge of the upper surface of the uppermost metal sheet S.

[0004] The lower end of the PE laminated rust-proof paper 1 is wound with a kraft tape 6 along the lower end, and the kraft tape 6 is folded on the back side of the seat plate 4 and adhered to the back side of the seat plate. Fix to 4. FIG.
As shown in FIG. 5, the longitudinal end of the foot material 5 on the side of the seat plate 4 is cut out so as not to hinder the attachment of the kraft tape 6 to the rear surface of the seat plate 4.

[0005] Finally, after the protective plate 7 is placed on the uppermost surface as shown in Fig. 6, an iron band 8 is wound around as shown in Fig. 5C. Note that a corner angle 9 is interposed inside the bent portion of the iron band 8 in order to prevent the metal sheet S from being damaged. The iron band 8 wound in a direction perpendicular to the foot material 5 passes through the cut-out portion of the foot material 5 described above.

Another conventional technique is disclosed in Japanese Unexamined Patent Publication No.
There is also one disclosed in Japanese Patent Publication No. 278775. According to the technology 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 on the cardboard to improve the work efficiency at the work site. ing.

[0007]

However, according to the conventional method of wrapping the PE-laminated rust-preventive paper 1 as described above, the metal sheet S will be damaged if the PE-laminated rust-preventive paper 1 is torn after packing. There is a drawback that the rust prevention ability is extremely reduced due to immediate exposure to the outside air. Further, since the PE laminated rust-preventive paper 1 as a waste material after unpacking is integrated with the PE film 3, there is also a problem that it cannot be reused or recycled as a resource.

On the other hand, according to the prior art disclosed in the above-mentioned publication, the shape of the stacked metal sheets S changes due to changes in the plane dimensions of the metal sheets S, the number of sheets in one lot, and the like. In order to avoid delays in the operation, boxes of various dimensions must be formed in advance, resulting in a significant increase in cost. The present invention has been made in view of such problems of the conventional technology, and has a method of packing a metal sheet that is low in cost, has excellent rust prevention effect, and enables reuse of waste material. It is intended to provide.

[0009]

According to one aspect of the present invention, there is provided a method for packing a plurality of stacked metal sheets, wherein the stacked metal sheets are vaporized. After covering with a rust-proof paper impregnated with a rust agent, the outside of the rust-proof paper is covered with a waterproof sheet, and between the metal sheet and the rust-proof paper, and between the rust-proof paper and the waterproof sheet. In each case, an air layer was formed.

According to a second aspect of the present invention, in the first aspect of the present invention, after covering the outer side of the rust-proof paper with the waterproof sheet, the four sides on the upper surface side and the four sides on the lower surface side are provided with the respective sides. It was decided to wind the band with the corner angle corresponding to the length. According to a third aspect of the present invention, in the first or second aspect, 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 procedure for packing a metal sheet S in the present embodiment. The same reference numerals are given to members and the like similar to those in the above-described conventional technology.

That is, even in the present embodiment, first, as shown in FIG. 1A, a plurality of metal sheets S are laid in a rectangular parallelepiped on a seat plate 4 to which foot members 5 are fixed on the back side. Stack up. Next, as shown in FIG. 1B, kraft paper 10 as rust-proof paper impregnated with a vaporizable rust-preventive agent is wound around four sides of the stacked metal sheets S. Also in this case, the kraft paper 10 covers the four sides of the metal sheet S and the seat plate 4 and has a width extending from the upper surface of the uppermost metal sheet S further upward. The protruding portion is folded inward to cover the edge of the upper surface of the uppermost metal sheet S.

Further, a polyethylene film 11 as a waterproof sheet is wound around the kraft paper 10 so as to cover the outside. In addition, such polyethylene film 11
The width is set so as to extend further upward from the upper surface of the uppermost metal sheet S and further lower than the back surface of the seat plate 4. The portion protruding downward from the rear 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 rear surface of the seat plate.

The polyethylene film 11 may be replaced with a polyethylene shrink film 11A as a heat-shrinkable sheet. In this case, the polyethylene shrink film 11A is simply wound around a body and then retained in an oven at a predetermined temperature. As shown in FIG. 1C, a portion projecting upward from the upper surface of the metal sheet S (the same applies to a portion projecting 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 the protective plate 7 is placed on the uppermost surface as in the prior art, as shown in FIG. 2 which is a perspective view of the completed package, the four sides on the upper side and the four sides on the lower side have the length of each side. The iron band 8 is wound from outside the corner angles 12 with the corresponding corner angles 12 applied. In addition, what is necessary is just to use the inferior goods etc. which were produced at the time of the shearing of the metal sheet S, etc., and it is not necessary to shear the protective plate 7 daringly.

The length of the corner angles 12 is preferably matched to the length of the side to which they are applied, but this need not be strictly the same, but is actually aimed at the minus tolerance side, Should 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 increases, and a cross-sectional view showing the packing state of the metal sheet S (however, , And the band 8 are omitted.) As shown in FIG.
3 is formed, an air layer 14 is formed between the kraft paper 10 and the polyethylene film 11, and the air layers 13 and 14 are filled with a rust inhibitor vaporized from the kraft paper 10 to form 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 on the inside of the polyethylene shrink film 11A and the inside of the kraft paper 10 at the time of heat shrinkage, so that the air layers 13 and 14 are also formed. You.

Then, as described above, the double air layers 13, 1
If the polyethylene film 11 is torn, the sealing inside the air layer 13 is maintained as long as the kraft paper 10 is not broken. There is no such thing. In addition, since the kraft paper 10 and the polyethylene film 11 are formed as separate sheet members, and the air layer 14 is formed without making close contact between them, there is a possibility that both the polyethylene film 11 and the kraft paper 10 are broken. Are extremely small as compared with the case where they are integrated as in the prior art.

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,
If the packing method as in the present embodiment is used, it is possible to cope with a change in the size of the packing object only by preparing a few types 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 a rust-proofing paper and a waterproof sheet, the possibility that the rust-preventing force is suddenly reduced without incurring a large increase in cost is reduced, and the reuse of waste materials is also possible. This has the effect.

In particular, according to the invention of claim 3, in addition to the above effects, there is also an effect that the efficiency of the packing operation is improved.

[Brief description of the 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 where packing is completed in the embodiment.

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

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

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

FIG. 6 is a sectional view showing a conventional packing state.

[Explanation of symbols]

Reference Signs List 4 seat plate 5 foot material 7 protective plate 8 band 10 kraft paper (rust-proof paper) 11 polyethylene film (waterproof sheet) 11A polyethylene shrink film (heat-shrinkable sheet) 12 corner angle 13, 14 air layer

Continued on the front page (72) Inventor Norihiro Okawa 1 Kawasaki-cho, Chuo-ku, Chiba-shi, Chiba Kawasaki Steel Corporation Chiba Works (72) Inventor Kazuhisa Hamakami 1 Kawasaki-cho, Chuo-ku, Chiba-shi, Chiba Kawasaki Steel Corporation In the Chiba Works (56) References JP-A-5-278757 (JP, A) JP-A-6-286762 (JP, A) JP-A-5-201474 (JP, A) JP-A-5-22369 (JP, A U) (58) Field surveyed (Int.Cl. ⁶ , DB name) B65B 25/14 B65D 71/02

Claims (3)

(57) [Claims] 1. A method for packing a plurality of stacked metal sheets, wherein the stacked metal sheets are covered with a rust-proof paper impregnated with a vaporizable rust-preventive agent, and the outside of the rust-proof paper is covered with the rust-proof paper. Is covered with a waterproof sheet, and, furthermore, an air layer is formed between the metal sheet and the rust-proof paper and between the rust-proof paper and the waterproof sheet, respectively. Packing method. 2. After covering the outside of the rust-proof paper with the waterproof sheet, a band is wound around the four sides on the upper surface side and the four sides on the lower surface side with corner angles corresponding to the length of each side. Item 4. A method for packing a metal sheet according to Item 1. 3. The method for packing a metal sheet according to claim 1, wherein a heat-shrinkable sheet is used as the waterproof sheet.