JPH0848362A - Method for packing metallic sheet lot and corner protector used therefor - Google Patents

Abstract

PURPOSE:To realize a method for reliably protecting a corner of a sheet lot and a corner protector used for the method. CONSTITUTION:A sheet lot 1 is wrapped by an anti-rusting sheet, a triangular- pyramid corner protector 3 is mounted on each summit of the parallelepiped sheet lot 1, and bands 5 are wound over ridges of the sheet lot 1 from over the corner protector 3 in parallel to bind for packing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packing method for binding a "sheet lot" formed by stacking metal sheets such as tinplate sheets with a steel band, and a corner protector used therefor.

[0002]

2. Description of the Related Art Metal sheets such as tinplate sheets, which have been sheared to a predetermined size in a shearing facility, are stacked on a base plate called a skid in a piler on the outlet side of the shearing facility to form a sheet lot. This rectangular parallelepiped "sheet lot" is wrapped with rust-proof paper, and is bundled with steel bands from the top of the package in order to prevent the load from collapsing during transportation and shipped.

Regarding the packaging of sheet lots, Japanese Patent Laid-Open No.
As described in Japanese Patent Laid-Open No. 146479, it has been attempted to cover with a heat-shrinkable film instead of the rust-proof paper, heat and shrink it for packaging. When bundling with a steel band, in order to prevent damage to the metal sheet, it is common to attach a pad to the ridge line portion of the sheet lot which is a contact portion.

An example of such a conventional package is shown in FIG. 1 is a sheet lot, 2 is a skid, 4 is a reliance, 5
Is a band. For the purpose of automating the steps from mounting of the pad to band binding, vertical ridges in a rectangular parallelepiped package as described, for example, in JP-A-51-88392 and JP-A-51-96690. The device for attaching the metal plate and the device for attaching the metal plate on the horizontal ridge have also been proposed.

The pad to be attached by these devices is equilateral angle steel or a steel plate bent into an L-shaped cross section and cut into a predetermined length, and is attached to each ridge of a rectangular parallelepiped as shown in FIG. To be Therefore, the apex (corner) of the sheet lot, which is likely to collide during transportation and transportation, is not protected, and it is possible to prevent accidents such as breakage of the corner packaging or crushing of the sheet corner due to a flaw. Can not.

Further, since the rectangular parallelepiped has twelve ridge lines and the mounting directions of the pad are all different, not only 12 pieces of the pad mounting device are required, but also the pad having a different length depending on the product size. Since it has to be used, there are many practical problems such as having to prepare a large number of types.

[0007]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a sheet lot binding method and a corner protector used for the same, which solves the above problems and reliably protects the corners of the sheet lot. .

[0008]

The method of packing a metal sheet lot according to the present invention comprises:
A rectangular parallelepiped sheet lot is equipped with a hollow corner-pyramidal corner protector having no bottom at each of the eight apexes, and a band is bound from above the corner protector in parallel with the edge line of the sheet lot. To do.

Further, the corner protector of the present invention used in this packing method cuts from one apex of two diagonal lines of a square thin metal plate to an intersection of the two diagonal lines,
The remaining diagonals are each bent inward at right angles to form a hollow triangular pyramid shape without a bottom surface.

[0010]

[Operation] According to the present invention, the triangular pyramid-shaped corner protectors are brought into contact with the eight corners (apex) of the sheet lot, and a steel band is put over the corner protectors to bind the sheets. The top of the lot is reliably protected.

[0011]

Embodiments of the present invention will be described in detail with reference to the drawings. An example of the package is shown in FIG. 1 is a tin plate sheet lot, which is a rectangular parallelepiped package in which a predetermined number of tin-plated tin plate sheets are stacked and packaged in rust-proof paper.
Reference numeral 2 denotes a skid, which is usually made of wood or plastic, and is a base plate with legs for carrying the sheet lot 1 while it is carried by a crane, a forklift or the like. 3 is a corner protector and 5 is a steel band.

Corner protectors 3 made by folding steel plates are provided at eight apexes of the sheet lot 1. The steel band 5 is arranged at a position close to the end so as to touch the ridgeline of the corner protector 3. Since the package of the present invention is configured in this way, no protector is required on the ridge of the sheet lot itself. Since the top of the sheet lot is eight, only eight corner protectors are required for one package, and the size is much smaller than the pad of Fig. 5, so the material cost is greatly reduced. To be done. Further, since the same corner protector can be used regardless of the size of the package, in principle, only one kind of corner protector needs to be prepared, and there is no need to judge the kind at the time of attachment, resulting in good work efficiency.

The width of the tin plate is 700 to 950 mm in width.
The length is 750 to 980 mm, the plate thickness is 0.2 to 0.35 mm, and the number of stacks is 1000, for example. The skid 2 has the same width and length as the tinplate sheet, and the base plate has a thickness of 25.
Since the size is mm, the dimensions of the combined sheet lot 1 and skid 2 are length (length) 750 to 980 mm and width (width) 700.
~ 950mm and height is 225 ~ 375mm.

The corner protector 3 is manufactured by bending a square thin steel plate shown in FIG. If the half length of the diagonal line is h, the length of one side of the square is √2h. The areas partitioned by two diagonal lines are designated as A, B, C, and D in the clockwise direction as shown in FIG. The boundary between B and C is notched and separated, but the remaining diagonal lines shown by broken lines are fold lines, and both are in the same direction, for example, valley folds.

FIG. 3 is a perspective view showing a bending procedure,
(A) is the same as that of FIG. 2 which is not bent yet.
First, as shown in (b), the planes C and D are raised up to the vertical direction. Then, as shown in (c), the surface C is bent forward until it becomes a right angle with the surface D. Further, as shown in (d), the remaining surface B is raised and stacked on the back side of the surface C to complete the work. The corner protector 3 has surfaces C and D.
It is not necessary to stack two sheets on the whole surface, but there is also a meaning to reinforce the surfaces A and C because the materials are not continuous. Also, if the surface B is removed, it will take more work to save the material. Since it does not happen, it is practical to keep two sheets stacked.

As described above, when the corner protector is manufactured by folding a steel plate, it is better to have a thicker plate in terms of protection ability. However, considering workability, a thicker steel plate cannot be used. Is preferably in the range of 0.05 to 0.8 mm. The length of each of the three ridge lines of the corner protector 3 formed in the shape of a triangular pyramid is half the length of the diagonal line in FIG. 2, that is, h. Since it is not preferable to be close to
It is desirable that the size is at least 50 mm or more.
00 mm or less, that is, 70 to 42 when it is corrected to the length of one side of the square
It is desirable to be in the range of 5 mm. In this embodiment, h = 80 mm and the length of one side of the square is 113 mm based on the size of the above-mentioned sheet lot.

When the corner protector 3 is manufactured by bending it from a thin steel plate as in this embodiment, it can be manufactured at a very low cost and in a large amount, so that it is highly practical, but it can also be manufactured integrally by, for example, plastic molding. . FIG. 4 shows the state of wrapping paper tearing and crushing sheet crushing occurring at the corners of the tin plate sheet lot, and the packing method of the present invention using the corner protector 3, and the angle-shaped steel sheet at the ridge of the sheet lot. It is a graph which shows the result compared with the conventional packing method which applied the protector of FIG. In the figure, “a” indicates the occurrence of tearing of the wrapping paper, and “b” indicates the occurrence of collapse of the tint sheet. It can be seen that the present invention drastically reduces these damages and significantly improves the quality.

The corner protector and the packing method of the present invention can be applied to all metal sheet lots.
In particular, the quality effect is extremely remarkable for the tin plate sheet lot, which is thin and has a soft material and is easily damaged.

[0019]

According to the present invention, by using a small-sized corner protector which can be mass-produced, the apex portion of the sheet lot is surely protected, and the accident such as the breakage of the wrapping paper and the crushing of the corner portion is drastically reduced. And the quality is improved, and the packaging cost is greatly reduced.

[Brief description of drawings]

FIG. 1 is a perspective view showing a package according to an embodiment of the present invention.

FIG. 2 is a plan view showing a material of a corner protector of the present invention.

FIG. 3 is a perspective view showing a manufacturing procedure of the corner protector of the present invention.

FIG. 4 is a graph showing the effect of the present invention.

FIG. 5 is a perspective view showing a package according to a conventional technique.

[Explanation of symbols]

 1 sheet lot 2 skid 3 corner protector 4 pad 5 band

Claims (4)

[Claims] 1. A method of packing a sheet lot comprising stacking metal sheets, wherein the sheet lot is packed with rust-proof paper, and the rectangular parallelepiped sheet lot has a hollow triangular pyramid shape with no bottom at each of eight apexes. The method for packing a metal sheet lot, comprising: attaching the corner protector, and banding from above the corner protector in parallel with the ridgeline of the sheet lot. 2. A hollow triangular pyramid having no bottom by cutting from one apex of two diagonals of a square thin metal plate to the intersection of two diagonals and bending the remaining diagonals inward at right angles. A corner protector for use in the packing method according to claim 1, which is formed by molding. 3. The square thin metal plate has a plate thickness of 0.05 to 0.8 mm.
The corner protector according to claim 2, which is the steel plate. 4. The corner protector according to claim 2, wherein the square thin metal plate is a steel plate having a side of 70 to 425 mm.