JPH0221409Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field] The present invention is used when exporting cylindrical rolled materials such as steel plates, and the present invention is used when exporting materials wound into a cylindrical shape such as steel plates. It relates to a packaging material that covers a container with a cover made of plate material such as an iron plate.

[Description of prior art]

FIG. 1 is an external perspective view showing a state in which a cylindrical rolled material such as a steel plate is packed using a conventional packing material, and FIG. 2 is a sectional view schematically showing the packing structure.

In Fig. 2, the cylindrical roll material 1 is indicated by a dashed line.
It is. This cylindrical roll material 1 is made by winding a steel plate that has undergone a process such as rolling into a cylindrical shape, and wrapping the surface with wrapping paper. To pack this
An outer circumferential cover 2 is attached to the outer circumferential surface of the cylindrical rolled material 1,
An inner cover 3 is attached to the inner circumferential surface. The outer circumferential cover 2 and the inner circumferential cover 3 are attached by winding plate materials such as iron plates in accordance with the diameters of the inner circumference and outer circumference of the winding material 1. Further, end covers 4 are attached to both end faces of the cylindrical rolled material 1. This end cover 4 is made of a donut-shaped plate material, and a cylindrical body 4a is formed on the inner diameter thereof by a process such as drawing. It is interposed between the peripheral cover 3 and the peripheral cover 3. Further, an inner corner protector 5 is fitted to the inner corner of the end cover 4, and an outer corner protector 6 is fitted to the outer corner of the end cover 4. Both corner protectors 5 and 6 are formed from iron plates having an L-shaped cross section and formed into a ring shape.

After each cover and protector are attached as described above, a plurality of bands 7 are wrapped around the outer and inner peripheries and tightened and fixed as shown in FIG.

[Problems with conventional technology]

However, in the above-mentioned conventional packaging material, the end face cover 4 that covers the end face of the cylindrical rolled material 1 is formed of a thin iron plate, so there is a drawback that it is difficult to maintain flatness. That is, when forming the end cover 4 from a plate material, a hole is made in the center and the cylindrical body 4a is formed by a process such as drawing, but distortion occurs due to residual stress during this forming process, as shown in FIG. This makes it more likely to cause ripples. When the diameter of the end cover 4 is large, this distortion becomes very large.

When the end cover 4 which has been distorted in this manner is used, it becomes difficult to fit the end cover 4 onto the end face of the cylindrical material 1, as shown in FIG. Furthermore, if the end cover 4 is heavily corrugated, the fit between the outer edge of the end cover 4 and the outer corner protector 6 becomes uncertain, and a gap may be created between the end cover 4 and the outer corner protector 6. There is an inconvenience.

[Purpose of this invention]

The present invention has been developed by focusing on the above-mentioned conventional problems.The shape of the end cover formed from a thin plate is stabilized, the strength of the end cover is increased, and the end cover of the cylindrical material is securely attached to the end face. The object of the present invention is to provide a packaging material for a cylindrical roll material that can be fitted.

[Structure of the present invention]

The packaging material for a cylindrical rolled material according to the present invention includes an outer circumferential cover that covers the outer peripheral surface of the cylindrical rolled material, an inner circumferential cover that covers the inner circumferential surface, and an end face cover that covers the end face of the rolled material, and the end face cover is , in which a hole is bored in the center of a disc made of a thin plate material, and the peripheral part of the hole is bent so as to face the inner peripheral cover, and the outer edge part of the end cover has a predetermined shape. It is characterized by being bent into a tapered shape in width.

[Example of the present invention]

Embodiments of the present invention will be described below with reference to FIG. 5 and the following drawings.

FIG. 5 is a perspective view showing an end cover 10 used for packaging a cylindrical roll according to the present invention. This end cover 10 is used in place of the end cover 4 in the conventional example shown in FIGS. 1 and 2.

This end cover 10 is formed from a thin metal plate, and has a main body 11 with a hole in the center and a cylindrical body 12 positioned around the hole formed by a process such as drawing. Further, a tapered portion 13 is formed at the outer edge of the main body 11. The tapered portion 13 is formed by bending the outer edge of the main body 11 to a predetermined width and at a shallow angle.

An example of a method for forming the tapered portion 13 will be explained with reference to FIGS. 6 and 7. This end cover 10
is cut out into a disc shape from a plate material, and the tapered part 13 is formed following this cutting process. Rotary shears 21a and 21b are used to cut out the end cover 10 into a disk shape. The cutting process involves cutting the center part of the board into the shaft body 2.
It is held at 0a and 20b and rotated to sequentially cut and form the peripheral edge of the end cover 10. A protrusion 22 is provided at the center of the lower blade 21a of the rotary shear, and a roller 23 made of rubber molded into a tapered shape is fixed at the tip of the upper blade 21b. And rotary shear 21
Immediately after the cutting process by a and 21b, this roller 2
3, the peripheral portion of the main body 11 is sequentially formed into a tapered shape. As a result, as shown in FIG. 7, the cross-sectional shape of the end cover 10 is
and the tapered portion 13 are bent into a mountain shape.

Next, Figures 8 and 9 (partially enlarged view of Figure 7)
shows another means for forming the tapered portion 13. In this example, the end cover 10 is cut out into a disk shape, and then a plurality of gears α are formed on the peripheral edge of the main body 11 to form the tapered portion 13.

Next, the overall structure and packing work of the cylindrical roll material using the end cover 10 described above will be described in the 10th section.
This will be explained with reference to figures (sectional views).

Reference numeral 1 designates the same cylindrical rolled material as shown in the conventional example of FIG. 2, which is a rolled steel plate wrapped in wrapping paper.

The end face cover 10, which is a characteristic part of the present invention, is attached to the end face of this cylindrical rolled material 1, and the central cylindrical body 1
2 is fitted onto the inner peripheral portion of the cylindrical winding material 1. Then, the inner circumferential cover 3 is inserted into the inner circumferential portion of the cylindrical rolled material 1. Furthermore, an inner corner protector 5 similar to that shown in FIG. 2 is fitted to the end of the inner cover 3. Further, as in the conventional case, an outer circumferential cover 2 is wrapped around the outer circumferential surface of the cylindrical rolled material 1, and an outer circumferential corner protector 6 is fitted to the edge of the outer circumference. Then, a belt 7 (the same as in FIG. 1) is passed around the inner cover 3, end cover 10, and outer corner protector 6 to fix each cover.

During this packing work, the end cover 10 is attached to the main body 11.
Due to the presence of the tapered portion 13 around the cylindrical material 1, the shape is stabilized and the end cover 10 is not deformed into a wavy shape unlike the conventional end cover 4 shown in FIG. It will fit. In particular, due to the presence of the surrounding tapered part 13, the outer peripheral edge part A of the end face cover 10 comes to reliably contact the end face of the cylindrical winding material 1, and a gap etc. is created at the contact part with the outer peripheral corner protector 6. It disappears. Furthermore, due to the presence of the tapered portion 13, a space B is formed between the main body 11 of the end cover 10 and the end surface of the cylindrical winding material 1. This space B will function as a buffer section, and the end cover 1 will be
It becomes possible to absorb the external force that hits the outer surface of the 0, improving the protection function. Furthermore, since the main body 11 of the end cover 10 protrudes outward (towards the right in FIG. 10) beyond the outer corner protector 6, when a packaged item is lifted with a hanging device, it may not be easily attached to other members. Even if the end face hits, the main body 11 of the end face cover 10 will come into contact with it, and the outer corner protector 6 will not directly hit another member. Therefore, accidents such as damage such as peeling off of the outer corner protector 6 can also be prevented.

Further, FIG. 11 shows another embodiment. The end cover 10a in this embodiment has a tapered portion 13a formed around its main body 11a, and a flat collar portion 13b is further formed on the outer periphery of this tapered portion 13a. When this end cover 10a is attached to the end surface of the cylindrical winding material 1, the back surface C of the collar portion 13b comes into contact with the end surface of the cylindrical winding material 1 over a wide area. Therefore, this back surface C does not apply a sharp force to the end face of the cylindrical wrapping material 1, and thus defects such as damage to the wrapping paper of the cylindrical wrapping material 1 can be prevented. Furthermore, this collar part 13b
is parallel to the inner surface of the outer corner protector 6, so that the end cover 10a and the outer corner protector 6 are in good contact with each other.

[Effects of this invention]

As described above, according to the present invention, the following effects can be achieved.

(1) Since the tapered portion is formed around the end cover, the shape of the end cover is stabilized, and the fitability to the end face of the cylindrical material is improved. Therefore, since a large-diameter end cover can be formed from a thin plate material, it is possible to reduce the weight of the end cover and save material costs.

(2) Due to the presence of the tapered part, the periphery of the end cover will surely come into close contact with the end face of the cylindrical material, the contact with the corner protector will be stable, there will be no gaps, and the packaging state will be improved. Become good.

(3) Due to the presence of the tapered portion, a buffer space is created between the main body portion of the end cover and the end surface of the cylindrical winding material. This also makes it possible to protect the contents of the package against external forces.

[Brief explanation of the drawing]

Fig. 1 is an external perspective view showing a state of packing using a conventional cylindrical roll material, Fig. 2 is a sectional view schematically showing the packing structure, Fig. 3 is a perspective view showing a conventional end cover, and Fig. 4 is a cross-sectional view showing the problems of the conventional method, and the fifth
The figures below show examples of the present invention, and the fifth
The figure is a perspective view of the end cover, FIG. 6 is a perspective view showing an example of the process of molding the end cover, FIG. 7 is a sectional view of FIG. , FIG. 9 is an enlarged view of a portion thereof, FIG. 10 is a cross-sectional view showing a packed state, and FIG. 11 is a cross-sectional view showing a packed state according to another embodiment. 1... Cylindrical winding material, 2... Outer cover, 3...
Inner circumference cover, 5, 6...Corner protector, 1
0, 10a... End cover, 11, 11a... Main body, 12, 12a... Cylindrical body, 13, 13a...
Tapered part, 13b... collar part.

Claims (1)

[Scope of utility model registration request] The cylindrical winding material has an outer circumferential cover that covers the outer circumferential surface, an inner circumferential cover that covers the inner circumferential surface, and an end face cover that covers the end face of the winding material. In the packaging material, which is a cylindrical roll having a hole formed therein and the peripheral part of the hole is bent so as to face the inner cover, the end cover has an outer edge tapered to a predetermined width. A cylindrical packaging material characterized by being bent into a shape.