JPS5819543B2 - Method for manufacturing box-shaped bags and boxes - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing boxes for box-shaped bags, industrial equipment, devices, and the like.

BACKGROUND ART Conventionally, leather and plywood, aluminum and plywood, decorative iron plates, etc. are pasted together to form a double board, and box-shaped bags and boxes made using the double-layered board materials are widely known.

71) However, when the above-mentioned plate material is subjected to bending or drawing processing, the bending part is strained due to the difference in elongation rate of each constituent material of the above-mentioned plate material, and each constituent material is likely to separate from each other. Because the strength of the bent part is weakened, it was difficult for Kokichi to create the main bodies and lids of box-shaped bags and boxes by bending and drawing a single sheet of material. .

In addition, box-shaped bags and boxes made of the above-mentioned laminated plates have the disadvantage that they are weak against impact and easily become uneven, are prone to warping and rust, and do not have good insulation properties.

For this reason, it lacks the strength to be used as a box-shaped bag or as a box for industrial equipment, equipment, etc., and cannot sufficiently protect stored items, making it difficult to say that it is a durable product.

The present invention was made with the aim of solving the above-mentioned drawbacks, and its purpose is to create a three-layer laminate made of a new material, polyethylene sheet, as a core material, and aluminum sheets pasted on the front and back surfaces of the core material. Using board materials and taking advantage of their characteristics,
To provide a method for manufacturing box-shaped bags and boxes that requires a small number of steps and is robust, lightweight, and aesthetically pleasing.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 shows the cross-sectional structure of a three-layer laminate 1 used in the present invention.

This three-layer laminate 1 uses a polyethylene sheet 2 as its core material, and aluminum sheets 3 are attached to both sides of the polyethylene sheet 2 by means such as pressure bonding.
It has a completely new material composition that is integrated and laminated.

Note that the thickness of each layer is 0.1 to 0.2 mm for the aluminum layer.

The polyethylene layer is 2 to 4 mrlL.

Therefore, this laminate uses a polyethylene sheet 2 as a core material, compared to the conventional two-layer laminate made of leather and plywood, aluminum and plywood, decorative iron plate, etc., as described above.
Since the aluminum sheet 3 is pasted on both sides and has a one- or three-layer structure, it has extremely high rigidity and light weight (specific gravity 1.04 to 1.30) compared to its thickness. There is.

◎High impact strength, good water resistance, no warping, rust,
No worries about corrosion.

■Excellent heat insulation and sound insulation properties.

■Easy to bend and draw, allowing parts to be embedded.

In addition, since the polyethylene sheet 2 is a polymeric material, even if a θ nail is driven into it, the polyethylene sheet is made of a polymeric material, so it will not come out, and the nail extraction strength is higher than that of a conventional two-layer laminate. Significant improvement in comparison.

It has the following characteristics. In order to manufacture a box-shaped bag using the three-layer laminate 1 having such characteristics, as shown in FIG.
Grooves 4. are formed to a depth that reaches 3 layers of aluminum sheets or 2 layers of polyethylene sheets on one side, while leaving the groove 4.
4.4.4, and then a notch 5 having a length corresponding to the rising width H is provided at one end of each groove portion 4, 4.4.4.

As shown in FIG. 3, the peripheral edge portion of the three-layer laminate 1 constructed as described above is bent inward from the grooves 4, 4, 4, 4 to form peripheral walls 5a+5a+5a, 5a. Then, overlapping walls 6, 6.6°6 are provided at the four corners.

Therefore, when the aluminum sheet 3 is bent 90 degrees by bending or drawing, the difference in elongation rate between the front and back surfaces of the aluminum sheet 3 causes misalignment, wrinkles, or cracks, as shown in FIG. This can be prevented by forming 4.4.4.4.

Next, as shown in FIG. 5, the single wall portion 7 excluding the overlapping walls 6, 6, 6.6 is covered with a three-layer laminate of the same aluminum sheet and polyethylene sheet having the same size as the single wall portion 7. The reinforcing inner plate 7a is fixed with adhesive or the like to form the casing body A, and the lid B is formed by the same method.

As a result, all the side walls of the housing body A and the lid body B are
It is formed into a double wall structure as shown in the figure.

Next, a female sash 8 having a protrusion HB8a is fitted to the upper edge of the casing body A, and a grooved groove FjV=
9a is fitted.

In addition, there are L-shaped studs 1 at each corner of the housing body A and the lid body B.
0 is fixed by caulking one or two places or using strong adhesive.

In case of large size, increase the number of caulking stops as necessary.

Furthermore, a hexagonal metal fitting 11 is caulked to a portion of each corner of the housing body A and the lid body B.

In the case of this caulking, the three-layer laminate 1 of the present application has significantly higher strength when driven with rivets, nails, etc. than conventional two-layer laminates, so the rivets used for caulking are As a result, it becomes possible to increase the strength of the crimped part, which was the weakest part of conventional bags.

Then, the housing body A and the lid body B configured in this manner are joined together with a hinge 12.12, and a lock 13 and a handle 14 are attached.
is attached, and then the inner parts of the housing body A and the lid body B are finished with cloth or cushioning material 15.

The casing body A and the lid B thus formed are made of a polyethylene sheet as a core material and a reinforcing inner plate fixed to the overlap wall 6.6.6.6 portion and the single wall portion 7, both of which are covered with aluminum sheets. 7a to form a completely double-walled structure, in addition to the characteristics of the material itself, a box body with extremely high strength and rigidity is formed.

Note that the cutout groove 4°4.4. which is one of the features of the present invention.
4, as mentioned above, should be appropriately deep enough to reach one or two layers of the laminate that constitutes the surface that forms it, and should be formed so as to minimize the decrease in strength of the laminate member. This is of course a necessary condition.

Furthermore, as shown in FIG. 7, for example, when attaching the force plate portion 16 etc. to the surface of the force plate, a recess 17 is formed.
It is preferable to retract the edge part 16 so that it does not protrude above the surface of the band (like a protrusion).

In such a case, according to the present invention, the characteristics of the three-layer structure of the aluminum sheet and the polyethylene sheet make it possible to easily form the recessed portion 17 using a press or the like and to produce a beautiful finished surface.

According to the present invention, a laminate made of polyethylene as a core material and aluminum bonded to the front and back surfaces is used as a material, and grooves are cut in accordance with the laminate structure, and the material is bent and reinforced. This allows us to manufacture the casing body and the lid body.1 This allows us to greatly reduce the number of manufacturing steps. Because it is firmly fixed,
Box-shaped bags and boxes can be manufactured without fear of peeling off from each other.

Furthermore, due to the many characteristics that the above-mentioned laminate has compared to conventional two-layer laminates, it is possible to manufacture box-shaped bags and articles that are durable, robust, water resistant, impact resistant, and have excellent heat insulation properties. Can be done.

Furthermore, by pasting aluminum on both sides of the polyethylene plate, which is a polymeric material, and creating a one- or three-layer structure, it becomes difficult to remove the rivets at the crimped part, which is the weakest part of conventional bags. can significantly improve the strength of

Furthermore, on the inside surface of the housing body and lid,
Since each reinforcing inner plate is interposed, the housing main body and the lid body can be manufactured with a double wall structure, and their robustness, impact resistance, and heat insulation properties can be further improved.

[Brief explanation of drawings]

Fig. 1 is a partial sectional view showing the structure of a three-layer laminate, Fig. 2 is a perspective view showing the same laminate with cutout grooves and notches, and Fig. 3 is a four-periphery view of the same laminate. An explanatory diagram showing an intermediate process of starting up. FIG. 4 is a partially enlarged sectional view showing the state of the bent portion, FIG. 5 is a perspective view showing the state in which the reinforcing inner plate is inserted, and FIG. 6 is a completed perspective view after integral formation. FIG. 7 is a sectional view showing another embodiment of the hook portion. 1... Three-layer laminate, 2... Polyethylene sheet, 3... Aluminum sheet, 4...
...Groove H13,5...Notch, 7a...
... Reinforcement inner plate, A ... Housing body, B ...
...Lid body.

Claims (1)

[Claims] 1. On the inside of each of the four peripheries of two sets of rectangular three-layer laminates made by pasting aluminum sheets on both sides of polyethylene sheets, four strips are placed parallel to each of the four peripheries, leaving a desired width. Form a groove with a depth that reaches the polyethylene layer, provide a notch with a length corresponding to the rise width at one end of each groove, and bend the four circumferences of the three-layer laminate inward at approximately right angles to form a rise. , overlapping walls are formed at the four corners, and a single wall is formed in the remaining part, and a reinforcing inner plate consisting of the above three-layer laminate board force of the same magnitude as the single wall is provided on the single wall part. A method for manufacturing a box-shaped bag and boxes, in which a casing body and a lid body are formed with a double-walled side wall structure, and the casing body and the lid body are formed into linear layers, respectively.