JPS5940258Y2 - assembly box - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an assembly box whose bottom does not fall out easily.

Conventionally, there have been various shapes of inner and outer flaps forming the bottom of an assembly box made of cardboard or the like.

For example, as shown in FIG. 1, the shape of the outer flap 20 forming the bottom of the box body is approximately triangular, and an insertion portion 25a protruding in the left-right direction is provided near the apex, and the inner flap 30a has an insert portion 25a protruding from the outer flap. Some devices are provided with a cut line 35a into which the insertion portion 25a is inserted and locked.

When assembling the bottom from materials with the structure shown in FIG. 1, it is necessary to insert each of the four insertion pieces 25 into the four cutting lines 35 separately, which requires a considerable amount of effort. Was.

In addition, the strength of the bottom of this assembly box is weak, and if heavy objects or loose items with a load concentrated in the center are inserted, the inserted and locked insertion portion 25a may be pulled out. There was a simple drawback.

As a method to compensate for this drawback, the inner and outer flaps 20a and 30a forming the bottom are glued or stapled to each other, and a reinforcing plate having a width and length approximately equal to the width and length of the inside of the bottom is attached to the bottom of the box. It was placed inside.

The present invention provides an assembly box which can be easily assembled without the need for glueing or other labor during assembly, and which has a high strength bottom.

The assembly box 10 according to the present invention is, for example, a so-called A-shaped cardboard box type in which left and right side walls 12 and front and rear side walls 13 are arranged alternately and in series via bending lines on the left and right, as shown in FIG. The outer flap 20 forms one side of the bottom via the upper edge (or lower edge) of the upper edge (or lower edge) of 12, and the other side of the bottom is formed at the upper edge (or lower edge) of the front and rear side walls 13, 13'. In the plate-like material 15 provided with the inner flap 30, the shapes of the inner and outer bottom flaps 20, 30 are as follows.

That is, the outer flap 20 forms an edge 22 forming the required α at both ends of the outer flap base 210, and the upper end 24 of the edge
It has a shape in which an overhanging insertion piece 25 is provided outwardly from the top.

The needle flaps 20 are of a mutually abutting type, and the height h from the base of the outer flap 200 is equal to the width l of the box body 10, the upper edge 23 is parallel to the base 21, and the shape is symmetrical. It is.

Further, a locking notch edge 26 extending substantially perpendicular to the base 21 is provided.
is provided with an appropriate length perpendicularly from the upper edge 24 to the upper edge 23 of the outer flap.

On the other hand, the inner flap 30 has a substantially rectangular outer shape, and the angle α' between both ends of the inner flap base 310, which is the fold line with the front and rear side walls 13 and 13', and the base 31 is the required angle of the outer flap. On the line that makes a complementary angle to α, the base 3
1 is the distance from both ends 28 of the outer flap 20 to the edge 2 of the outer flap 20.
An engaging score line 35 having a starting point 36 at a position equal to the length of 2 is provided from both ends 28, and both score lines are aligned at the center.

Also, from the starting point 36 of the engagement cut line 35 to the base 31
A substantially perpendicular auxiliary cut line 38 is provided with an appropriate length, and a cut 39 is provided perpendicularly in the direction of the inner flap upper edge 33 from the matching point 37 to the upper edge 33.

When assembling the box 10 using the plate material 15 having the inner and outer flaps 20.30 shaped according to the present invention, the third
As shown in the figure, first, the left and right side walls 12 and the front and rear side walls 13 are formed into an annular shape using a joint 14, and then the rear inner flap 3
0 to the inside of the box, and then fold the two-needle flap 20 inward so as to overlap it.

After that, if the upper edge 23 of the outer flap 20 is pushed further into the box body 10, as shown in FIG. 40 and the outer portion 41 are separated and opened along the engagement cut line 35.

At this time, since the protruding insertion piece 25 of the outer flap 20 is located below the presser opening part of the inner part 40 of the inner flap 30, if the pressing force of the outer flap is removed, it will move outward from the opening part of the engagement cut line 35. The bottom part with the protruding insertion piece 25 inserted below the portion 41 can be easily assembled.

At the bottom of the box assembled as described above, the lower end of the protruding insertion piece 25 hooks onto the engagement cut line 35 of the inner flap 30 by the locking cut line 26 provided on the outer flap 20, and both flaps 30 are opened. This prevents the outer flap 30 from opening, thereby preventing the box body 10 from falling out.

As described above, the present invention provides the locking cut line 26 and the cutting line 39 on the inner and outer flaps 20 and 30, respectively, thereby eliminating the use of extra materials, making the assembly easy, and reducing the cost. The present invention provides an assembly box 10 that does not require an assembly box.

In another embodiment, the locking cut line 26 provided on the outer flap 20 is not cut from the upper edge 24, but is cut from the upper edge 24 to an appropriate length on the extension of the edge 22, as shown in FIG. An engagement cut line 27 is provided, and a locking cut line 26 is provided from the tip toward the upper edge 23.

In this embodiment, the protruding insertion piece 25 at the locking cut line 26 is hooked on the locking cut line 35 of the inner flap, and unlike the first embodiment, the locking cut line 26 of the outer flap 20 is different from the first embodiment. The protruding insertion piece 25 at the engagement cut line 27 portion is engaged with the engagement cut line 35 of the inner flap 30.

Therefore, the force of the load of the contents of the box 10 to open the inner flap 30 and allow the bottom of the box to fall out is due to the locking cut line 2 of the outer flap.
They are distributed not only in the 6th part but also in the 27th part of the engagement cut line of the outer flap, which prevents bottoming out even more strongly than in the first embodiment.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an example of a conventional plate material for an assembly box, FIG. 2 is a diagram showing a plate material for an assembly box according to the present invention, and FIGS. 3 and 4 are diagrams showing an example of a plate material for an assembly box according to the present invention. FIG. 5 is a diagram showing another embodiment of the present invention, which shows the procedure for assembling the body. 10... Assembly box, 11... Bottom, 1
2... Left and right side walls, 13... Front and rear side walls,
14... Tsugishiro, 15... Plate material, 20... Outer flap, 21... Base, 22... Edge, 23 ...Top edge, 2
4... Upper end of edge, 25... Overhanging insertion piece, 26... Locking cut line, 27...
Engagement notch extension line, 28...Both ends of inner flap base, 30...Inner flap, 31...
Base, 32... Inner flap side edge, 33...
... Upper edge, 35 ... Engagement cut line, 36
...Start point, 37...End point, 38...
...Auxiliary score line, 39... Cutting line.

Claims (2)

[Scope of utility model registration request] (1) In a type A corrugated box, the outer flaps of the inner and outer flaps forming the bottom of the corrugated box have both left and right edges as diagonally inward edges at a required angle α from both ends of the base, and An insertion piece is provided extending outward from the upper end of the edge, and a locking cut line is provided approximately perpendicularly from the upper end of both edges to the upper end edge of the outer flap, and the other inner flap is provided with an engagement cut provided in the inner flap. The angle that the line makes with the base at both ends of the base of the inner flap in the extension of the incision line is an angle that is complementary to the angle α of the edge of the outer flap. Engagement score lines starting at positions corresponding to the upper ends of the edges of both needle flaps, and cutting lines provided from the intersection of the side inner flap engagement score lines to the upper edge of the inner flap, and the inner flap engagement cut An assembly box characterized in that it has inner and outer flaps for the bottom part having a structure in which substantially perpendicular auxiliary score lines are provided at the base of the inner flap from both starting points of the lines. (2) Both edges are provided diagonally inward at a required angle α from both ends of the outer flap base, and both edges are provided with insertion pieces extending outward from the upper ends of both edges, and both edges are provided from the upper ends of both edges. A request for registration of a utility model, characterized in that an outer flap engagement cut extension line is provided on the extension line of the edge, and a locking cut line is provided at the upper end of the engagement cut extension line, which is substantially perpendicular to the upper edge of the outer flap. The assembly box described in item 1 of the scope.