JPS5917781Y2 - Box bottom structure - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a box bottom structure that prevents the bottom plate of a box such as a folding box from falling out.

The bottom plate of foldable cardboard boxes etc. is mainly made of bottom plate pieces 4,
5 horizontally, their inner edges butted together, adhesive tape is pasted on the seam of the butted parts (f'-, r), and they are fastened with appropriate fasteners such as ho-sochi-su. It is difficult to seal it, and it is obsessively sealed too tightly.

The disadvantage of not being able to do both is also -,).

In particular, once the box has been sealed, it is difficult to fold up the bottom plate for reuse, which is a major hindrance to the repeated use of the box.

The present invention was made in view of the above circumstances.

That is, in the present invention, a convex plate 2 and a concave plate 3 are provided using rectangular paperboard, plastic plate, metal plate, etc. By fixing the inner edges 4a and 5a of 4 and 5 firmly and integrally to each other with rivets or screws, and superimposing and meshing the convex plate 2 and concave plate 3, the bottom plate can withstand loads from above ( In other words, the bottom structure of the box effectively prevents it from opening downward (falling out of the bottom) due to the weight of the items stored in the box. A pair of concave plates (combined as a pair of concave plates) are used by being attached at any time to the bottom plate pieces 4 and 5 of the box 1, which have not been processed in advance to prevent bottoming out. be.

Next, an embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 indicates a foldable or solid box made of paperboard, corrugated paper, plastic plate, metal plate, etc. as appropriate.

A shows a reinforcing plate in which a convex plate 2 and a concave plate 3 are combined as a pair, and the convex part 2a of the convex plate 2 and the concave part 3a of the concave plate 3 are as follows.
Both plates 2 and 3 are formed with unevenness having substantially the same dimensions at opposing positions. For example, if a piece of paperboard 6 is cut into uneven plate shapes with partition lines drawn as shown in the first figure, cutting waste will be generated. It can be produced economically.

Thus, the reinforcing plate A is made by firmly fixing the base 2C of the convex plate 2 to the inner edge 5a of one of the opposing bottom plate pieces 4 and 5 of the box 1 using rivets 7 or screws. Similarly, the base 3C of the concave plate 3 is attached to the inner edge 4a of the other bottom plate piece 4.
is firmly fixed with rivets 7 or screws, etc., and the fixed convex part 2a of the convex plate 2 is fixed to the concave part 3a of the concave plate 3.
, and the tip portion 2b of the convex portion 2a is engaged with the base portion 3C of the concave plate 3.
The both ends 31) of the concave portion 3a are used by being superimposed on the base portion 2C of the convex plate 2.

Due to the mutual overlapping engagement of the convex plate 2 and the concave plate 3, the reinforcing plate A exhibits extremely strong durability against loads from above, and therefore the bottom plate piece to which the reinforcing plate A is firmly fixed as one piece. 4 and 5 can be effectively prevented from opening downward and falling out.

In the folded state, the bottom plate pieces 4 and 5 are folded inside the box 1 and folded with the plates 2 and 3 disengaged. Therefore, when the box 1 is foldable, the bottom plate pieces 4 and 5 are folded together with the box. It can be folded as is.

Note that the number of convex portions 2a of the convex plate 2 is not limited to one, but may be two or more, and correspondingly, the number of concave portions 3a of the concave plate 3 is also limited to one. Instead, two or more are optional.

[Brief explanation of drawings]

Fig. 1 is a plan view of a reinforcing plate that combines a convex plate and a concave plate as a pair, and a plan view of its material paperboard, and Fig. 2 is a perspective view showing the state in which the reinforcing plate fixed to the bottom plate of the box is in the middle of being overlapped and engaged. FIG. 3 is a perspective view showing a state in which the superimposed engagement is completed, and FIG. 4 is a bottom view of FIG. 3.

Claims (1)

[Scope of utility model registration request] A pair of convex plate 2 having a convex portion 2a protruding from one side of the rectangular plate, and a concave plate 3 having a concave portion 3a cut at a position opposite to the convex portion 2a on one side of the rectangular plate. each inner edge 4a, 5 of the opposite bottom plate pieces 4, 5 of the box.
A convex plate 2 and a concave plate 3 are separately fixed to a, and the convex part 2a and the concave part 3a of the drawing board are engaged with each other, and each tip part 2b,
3b is superimposed on each base 3c, 2C, and H to prevent the bottom of the box from falling out.