JPH02269653A - Corrugated cardboard delivery box - Google Patents

Abstract

PURPOSE:To repeatedly reuse the box and safely transport the goods by a method wherein raised pieces are provided on corner holders so as to prevent a box piled on another one from getting out of place. CONSTITUTION:Corrugated cardboard coated with stretched reinforced plastic film layer 5 on the external surface is employed as the material of a delivery box, a inverse channel shape top frame 7 made of extrusion-mold material is fixed on the rims of side walls 2 and 3 to protect the top edges, and corner holders 8 are attached to the corners to hold the top frame 7. Raised pieces 15 are protruded from the corner holders 8 so as to prevent a box piled on another one from getting out of place and allow the load of boxes piled on top to be uniformly distributed over the rims of the side walls 2 and 3 through the corner holders and the top frame 7. Thereby, a construction or stability in strength suitable for safe transportation of goods and repeated use of the box is accomplished.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to a returnable box made of paper and cardboard that is used repeatedly.

[Prior art]

Currently, for example, parts and materials for the automatic 1fL1311 series,
Electronics-related products, fruits and vegetables, textile products, etc. are increasingly being transported in returnable plastic boxes or cardboard boxes.

However, returnable plastic boxes have too much elasticity and have a large resistance to folding and bounce back even when folded, making them somewhat inconvenient when returning them after use. In addition, although they are durable, it is necessary to make molds for production, which makes small-lot production expensive.9 Moreover, with the diversification of consumer trends, returnable boxes are also required to be manufactured in small quantities and in a wide variety of products. Since its life cycle is short, about 6 months, it has the disadvantage that it cannot respond immediately to requests depending on the long-tempered 91 construction method of creating molds. In addition, dew condensation may occur on the inner surface, causing the product to rust, and if the product is a precision product, printed circuit board, etc., there is a problem in that the product value is completely lost.

Because plastic returnable boxes have these drawbacks, paper and cardboard returnable cases are increasingly being used. In other words, returnable boxes made of paper and cardboard can be shipped 91 times by cutting cardboard into predetermined shapes and assembling them.
It can quickly respond to requests for small quantities and a wide variety of products with different shapes and sizes, is inexpensive, and does not have the problem of condensation on the inner surface due to the material. However, returnable boxes made of paper and cardboard are moisture and water resistant.
There are problems with abrasion resistance, bursting strength, etc., and in particular, the cut ends of the cardboard are torn and the folded parts are frayed, making it impossible to use it for a long time.

[Purpose of the invention]

This invention solves the above-mentioned drawbacks, and has improved moisture resistance, water resistance, abrasion resistance, bursting strength, etc., and has a structure and strength stability suitable for safe transportation and repeated use of products. The purpose is to provide returnable boxes.

[Structure of the invention]

That is, this invention uses corrugated board having a stretched reinforced plastic film layer on the outer surface as a material for the returnable box,
A reverse channel-shaped opening frame made of extruded material is fitted to the upper part of the wall of each returnable box (llI!) to protect the cut end of the upper end, and a corner holder is attached to each corner to hold down the opening frame. Attachment: An upright piece was installed on the corner holder to prevent the returnable boxes stacked on top from coming off, and the load of stacking was applied evenly to the cut at the top of the side wall via the corner holder's entrance frame. It is something.

[Example 1] (Figures f51 to 8) Front and rear side walls 2.2 and left and right side walls 3.3 are provided protruding from the bottom wall 1 and bent, and seams 4.4 are protruded at both ends of the front and rear side walls 2, 2. Adjacent side walls 2 and 3 are connected by connecting the joints 4 with wires. This is an assembled form of a standard corrugated cardboard box, but unlike an ordinary corrugated cardboard box, the outer surface is stretch-strengthened and covered with a plastic film layer 5.

The stretch-strengthened plastic film layer 5 is made by laminating a cloth 5a made by weaving flat yarns 9, 10 made of a stretch-strengthened film such as polyethylene or polypropylene lengthwise and crosswise on the outer surface of the front liner 6, and further laminating a thin film thereon. 51) is laminated.

To explain this from the manufacturing process, the corrugated pole F is manufactured using the liner IJK paper 6 on which the film layer 5 is formed,
Assemble a box using the cardboard F. A method for manufacturing this corrugated board advantageously has already been developed by the present applicant (Japanese Patent Application No. 57-217560). The mouth frame 7 is fitted, corner retainers Ji48 are attached to the four corners to hold the mouth frame 7, and handles 23 are attached to the left and right side walls 3, 3.
23 is the installation.

The mouth frame 7 is made of an extruded plastic section and is formed in the shape of an inverted channel so that the upper ends of the side walls 2 and 3 are sandwiched between the side pieces 11 and 11. Further, grooves 12 are formed on the side pieces 11 so that they can be bent easily, and the thick double portion where the joint margins 4 overlap can also be elastically clamped.

The dog corner holder 8 is mainly composed of an L-shaped cap 13 that straddles the adjacent mouth frames 7, 7, and the outer edges of both wing pieces 14 and 14 of the cap 13 have upstanding pieces 1.
5.15 is provided in a protruding manner, and when the box is turned over, the second box is prevented from coming off by the upright piece 15.15. Furthermore, a protrusion 16 is provided at the inner corner to prevent the corner of the box placed on the cap 131 from falling inward. matacap 1
Both wing pieces 14 and 14 of 3 have inner and outer IN clamping pieces 1, respectively.
7.18 are provided protrudingly, and the outer clamping piece 18 can be reversed by a thin hinge part 19. In addition, the inner clamping piece 17 has a male protrusion 21 with a bulging tip.
8 are each formed with a cylindrical female protrusion 2o, and the male and female protrusions 2
0 and 21, the male protrusion 21 is split into two parts, and the female protrusion 20 has a narrow opening. A hole 22 is provided in the side wall 2.3 of the box, and the male and female protrusions 20.21 are connected through the hole 22.
The wing pieces 14, 14 of the +q yap 13 strongly clamp the mouth frames 7, 7 to prevent them from coming off.

The handle 23 is fitted into the mounting hole 24 of the side wall 3, and its fitting means includes a crocodile 25 that clamps the edge of the mounting hole 24, and upper and lower locking pieces 26 and 27 that are opposed to the crocodile 25. It is a provision. Further, the upper locking piece 26 is formed to be swingable at the hinge part 28, and the upper locking piece 26 is provided with an engaging protrusion 29.
5 has an engaging elastic piece 30 formed by a groove on which the engaging protrusion 29 is engaged.

When using the above returnable box, other returnable boxes are placed on the cap 13 of the corner holder 8 and stacked. Then, the square part of the upper returnable box is accurately placed on the cap 13 by the upright piece 15, and its load is applied evenly to the cut ends 31 at the upper ends of the side walls 2 and 3 via the opening frame 7.

In addition, the outer surface of the returnable box is made of a stretch-strengthened film layer 5, so it is moisture and water resistant, and has improved abrasion resistance and bursting strength.In particular, the sidewalls of the box have enhanced compression resistance. . Further, in this case, since the film R5 is double-layered and the lower layer is a cloth 5a of 7 lacquer yarns, the abrasion resistance and bursting strength as well as the compression resistance of the (1111) walls are particularly enhanced.

Note that the film layer 5 may include only the flat yarn cloth 5a.

[Embodiment 2] (Figs. 9 to 11) In this case, the bottom wall of the returnable box has a known special structure, and when the corner holder 8 is removed, it opens as shown in Fig. 11. However, since a stretch-reinforced film is laminated on the outer surface and film scraps 5 are formed thereon, the folded portion 32 can be prevented from being worn out by the film scraps 5.

〔Effect of the invention〕

As described above, the paper and cardboard returnable box of the present invention has the outer surface of the cardboard box covered with a stretched reinforced plastic film layer laminated to the cardboard, and an inverted channel-shaped opening made of an extruded profile at the upper end of each side wall. The frame is fitted, a corner holder is attached to each corner to hold down the opening frame, and the corner holder has an upright piece protruding from the corner holder to prevent other returnable boxes stacked in -L from coming off.・It is water resistant, has high abrasion resistance and bursting strength, and especially the side walls of the box have sufficiently strengthened compression resistance. Moreover, since the cut end of the upper end of the side wall can be prevented from tearing, it not only can withstand repeated use but also has remarkable effects such as being suitable for safe transportation of products.

In addition, it has the advantages of conventional returnable boxes made of paper and cardboard, such as being lightweight, inexpensive, easy to fold, able to quickly respond to small-lot, high-mix needs, and free from condensation on the inner surface.

[Brief explanation of drawings]

The Lfia figure (not the fiS1 figure) shows the first embodiment of the present invention, and FIG. 1 is a perspective view of a returnable box, and FIG.
Fig. 4 is an enlarged sectional view of corrugated cardboard, Fig. 5 is an enlarged sectional view of the front liner of corrugated cardboard, and Fig. 6 is an enlarged sectional view of corrugated cardboard. plan view of
FIG. 7 is an exploded perspective view illustrating the installation state of the corner holder, and FIG. vJ8 is a perspective view of the handle. PIS figures 9 to 11 show the second embodiment;
The figure is a perspective view of the returnable box, FIG. 10 is an enlarged sectional view of the cardboard, and FIG. 11 is an explanatory diagram showing the folded state. 2.3...I! ! & 5...Film layer 7...
- Mouth frame 8... Corner holder 15... Standing piece

Claims (1)

[Claims] 1) Cover the outer surface of the cardboard box with a layer of stretched reinforced plastic film laminated to the cardboard in advance, fit an inverted channel-shaped mouth frame made of extruded profile material to the upper end of each side wall, and fit a mouth frame at each corner. A returnable box made of paper and cardboard, characterized in that a corner holder is attached to hold down the paperboard, and a stand-up piece is provided on the corner holder to prevent other returnable boxes stacked above from coming off.