JPH0333634Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a foldable box made of flexible materials such as plastic, cloth, or paper.
In particular, it relates to the reinforcing vertical ribs.

(Prior Art) As a conventional art, there is a structure shown in FIG.

That is, the horizontally arranged plastic bottom plate A and the vertically arranged plastic side plate A are integrated at the upper edge of the bottom plate A on the A-1 side and the lower edge of the inner surface E-1 side of the side plate A. There was a foldable box that was connected so that it could be bent.

(Problems to be Solved by the Invention) In the conventional device described above, when the side plate A is bent upward with respect to the bottom plate A, the lower end surface E-2 of the side plate I becomes the lower surface A-2 of the bottom plate A. It will be located above the ground.

For this reason, when a load is applied from above to the side plate A due to stacking a large number of boxes, for example, the load is applied to the thin connecting part C, which has the disadvantage of damaging this part.

The object of the present invention is to obtain a novel vertical rib for reinforcing a foldable box that eliminates the above-mentioned drawbacks.

(Means for Solving the Problems) In order to achieve the above object, the present invention is constructed as follows.

That is, in a foldable box in which a horizontally disposed bottom plate and a vertically disposed side plate are integrally and bendably connected at the top edge of the bottom plate and the bottom edge of the inner side of the side plate, the thickness of the side plate is A vertical rib is formed that protrudes in the horizontal direction and extends in the vertical direction, and the lower end of the vertical rib protrudes below the connecting portion between the bottom plate and the side plate, and the lower end surface of the vertical rib is formed. The concave portion is disposed substantially on the same level as the lower surface of the bottom plate, and a recess into which the lower end portion is retractably fitted is formed at the edge portion of the bottom plate corresponding to the lower end portion of the vertical rib.

(Function) Since the present invention has the above structure, when the side plate is bent in the direction perpendicular to the bottom plate (upward),
The lower ends of the vertical ribs separate from the recesses formed in the bottom plate, and their lower end surfaces come into contact with the ground.

As a result, the load applied to the side plate from above is borne by the vertical ribs.

Furthermore, when the side plate is rotated outward with respect to the bottom plate, the lower end of the vertical rib is rotated toward the bottom plate around the joint between the bottom plate and the side plate, and fits into the recess of the bottom plate. become.

This causes the side plates to expand horizontally in the same way as the bottom plate.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

In the drawings, FIG. 1 is a perspective view of an assembled state showing an embodiment of the present invention, and FIGS.
Figure 7 is a plan view of the developed state, and Figures 8 to 10 are Figure 7.
- It is a cross-sectional view.

In Fig. 1, reference numeral 1 denotes a foldable box made of an elastic hard plastic material, such as polypropylene, and includes a rectangular bottom plate 2 and rectangular side plates on each of its edges, that is, on its short and long sides. It has 3, 3, 4, 4 integrally.

The side plates 3, 3 on the short side and the side plates 4, 4 on the long side both have the same structure, and one of them will be explained as a representative.

The connecting portion 5 between each of the side plates 3 and 4 and the bottom plate 2 is connected to the inner side of the corner where the two intersect at right angles, that is, as shown in FIGS.
4 are integrally connected to the lower edges of the inner surfaces 3a and 4a side of the base plate 2, thereby allowing each side plate 3 and 4 to be bent orthogonally (upwardly) and horizontally with respect to the bottom plate 2, centering on the connecting portion 5. shall be.

Each of the side plates 3 and 4 is integrally formed with locally thick reinforcing vertical ribs 6 and horizontal ribs 7.

As shown in FIG.
Extends along the upper edge of the Also, fresh ribs 6
are formed extending from the horizontal rib 7 toward the lower edge of each side plate 3, 4 at a predetermined interval in the longitudinal direction of each side plate 3, 4, and the lower end portion 6a thereof is shown in FIGS. 3 and 5. As shown in FIG. 2, each of the side plates 3 and 4 is made to protrude downward from the connecting portion 5 so that its lower end surface 6b is on the same level as the lower surface 2b of the bottom plate 2.

Further, a recess 2c is formed on the lower surface of the edge of the bottom plate 2 facing the lower end 6a. This recess 2c is
As shown in FIG. 7, each of the side plates 3 and 4 is formed in a shape that fits into the lower end 6a of the vertical rib 6 when it is rotated in the horizontal direction. Note that the recess 2c may extend through the edge of the bottom plate 2 in the vertical direction.

As shown in FIG. 7, each of the side plates 3 and 4 is divided from each other at opposing edges 3c and 4c, and a fan-shaped gusset plate 11 in plan view is integrally connected to the opposing edge 3c of the side plate 3. do. This gusset plate 11 is made of the same material as the side plate 3, and is molded at the same time as the side plate 3, and as shown in FIG.
The connecting portion with the base end edge 11a is thinly bound to reduce bending rigidity, thereby making it bendable in the direction perpendicular (inward) to the side plate 3 and in the direction in which the side plate 3 extends.

As shown in FIG. 7, the gusset board 11 has an outer peripheral edge 11c with a radius slightly smaller than the width in the height direction of the side panels 3 and 4, centered on the corner point (M) of the bottom plate 2. The opening angle is approximately 90 degrees. Further, the open end edge 11b is brought close to the opposing edge 4c of the side plate 4 when deployed, and a fitting claw 11d is formed protruding outward on the outer periphery of the open end edge 11b. It is always fitted into a guide groove 12 formed in the side plate 4, which will be described later.

On the opposing edge 4c of the side plate 4, the gusset plate 1 is provided.
A guide groove 12 is formed into which the outer circumferential portion of the guide groove 12 is slidably fitted.

That is, as shown in FIG. 7, FIG. 9, and FIG. 10, the side plate 4 is provided with a reinforcing thick wall portion 4d extending in a hook shape from the outer periphery of the opposing edge 4c toward the connecting portion 5. An arcuate guide groove 12 centered at the point (M) is formed in this thick portion 4d. The radius and groove width of this guide groove 12 are formed to be slightly larger than the radius and thickness of the gusset board 11.

And the above-mentioned fitting claw 11d of the gusset board 11
As shown in FIG. 7, is formed to protrude outward to such an extent that it does not separate from the guide groove 12 in the unfolded state.

Further, a circular engagement hole 13 is formed in the approximate center of the gusset plate 11 described above, and a guide groove 1 is formed in the side plate 4.
A semi-disc-shaped engagement body 14 is formed on the inner side of the 2.

As shown in FIG. 10, the engaging body 14 is integrally and bendably connected to the side plate 4 by forming the opposing edge 4c side of the side plate 4, that is, the base portion 14a, thin.
The open end 14b is separated from the side plate 4 by an arcuate slit. Further, from the base 14a to the open end 1
4b, and the open end 14
The outer end in the thickness direction of b is made to protrude outward in the thickness direction from the outer surface of the side plate 4.

Further, the engagement hole 13 and the engagement body 14 are connected to the seventh
As shown in the figure, the engaging bodies 1 are formed line-symmetrically with respect to the opposing edge 4c of the side plate 4 and equidistant from each other at an angle of 45 degrees with respect to the point (M).
The radius of the open end 14b of No. 4 is formed to be slightly smaller than the radius of the engagement hole 13.

As a result, when the gusset plate 11 is fitted into the guide groove 12 most deeply, the engagement hole 13 matches the outside of the engagement body 14, as shown in FIG. 6, and the engagement body 14 is fitted therein.

Next, the manner of use of the above embodiment will be explained.

From the state shown in Fig. 7, each side plate 3, 4 is
Fold upwards around the center.

This will cause the vertical rib 6 to rotate outwardly around the connecting portion 5 of the lower end 6a, and will separate from the recess 2c formed in the bottom plate 2.

When the side plates 3 and 4 stand up perpendicularly to the bottom plate, the lower end surface 6b of the vertical rib 6 is positioned on the extension line of the lower surface 2b of the bottom plate 2, as shown in FIGS. 3 and 5. I will do it.

On the other hand, when the side plates 3 and 4 stand up in a direction perpendicular to the bottom plate, the gusset plate 11 is deeply fitted into the guide groove 12, and the engagement hole 13 is inserted into the outer side of the engagement body 14 as shown in FIG. They match and engage with each other.

As a result, the load applied from above to the side plates 3 and 4 is mainly borne by the vertical ribs 6 having high bending rigidity, and the load applied from the outside to the side plates 3 and 4 is carried by the engaging holes 13 and the engaging bodies. The gusset board 11 is in charge of this via 14.

In this case, the engagement hole 13 and the engagement body 14 are engaged with each other by pressure between their end surfaces, that is, by force in a direction perpendicular to the bending direction of the engagement body 14.
are integrally connected over substantially the entire length of the opposing edge 3c of the side plate 3, so that the connection strength between the adjacent side plates 3 and 4 is increased, and each side plate is 3 and 4 will not expand inadvertently.

Note that 15 is a handle hole bored in the side plate 3.

Next, when disassembling (expanding) the box 1 into a flat plate, the engaging body 14 is pressed from the outside and bent inward at a predetermined angle as shown by the imaginary line in FIG.

Then, the engaging body 14 will be disengaged from the engaging hole 13 of the gusset plate 11, and the gusset plate 11 will fit into the guide groove 12.
It becomes possible to slide outward along.

In this state, if each side plate 3, 4 is rotated outward with respect to the bottom plate 2, the lower end 6a of the vertical rib 6 will rotate around the connecting portion 5 toward the concave portion 2c of the bottom plate. Then, it will fit into the recess 2c.

As a result, as shown in FIG. 7, each side plate 3,
4 expands in the horizontal direction like the bottom plate 2, and the whole becomes flat, reducing the space required for transportation or storage.

In addition, in the present invention, the vertical ribs 6 may be formed to protrude from the inner surfaces 3a and 4a of each side plate 3 and 4. Further, the connection between each side plate 3, 4 and the bottom plate is achieved by forming each side plate 3, 4 and the bottom plate using separate molds of the same material, and attaching a hook to one connecting portion and rotating the hook to the other connecting portion. A movably engaging engagement shaft may be formed, and the hook may be press-fitted into engagement with the engagement shaft.

(Effects of the invention) As is clear from the above description, according to the invention, the lower end of the vertical rib formed on the side plate is made to protrude below the connecting part between the side plate and the bottom plate, and corresponds to the lower end of the rib. Since the edge of the bottom plate is formed with a recess into which the lower end is retractably fitted, the rigidity against loads in the vertical direction is increased, and
When disassembled, each side plate can be expanded horizontally in the same way as the bottom plate, resulting in an effect that the space required for transportation or storage can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of an assembled state showing an embodiment of the present invention, and Figs. 2 to 6 are the same as Fig. 1.
- sectional view, FIG. 7 is a plan view of the developed state, FIGS. 8 to 10 are - to - sectional views of FIG. 7, and FIG. 11 is a sectional view of a main part showing a conventional example. 1: Foldable box, 2: Bottom plate, 2a: Top surface, 2
b: lower surface, 2c: recess, 3: side plate, 3a: inner surface,
3b: outer surface, 3c: opposing edge, 4: side plate, 4a: inner surface, 4b: outer surface, 4c: opposing edge, 4d: thick wall portion,
5: Connecting portion, 6: Vertical rib, 6a: Lower end, 6
b: lower end surface, 7: horizontal rib, 11: gusset board, 11
a: base edge, 11b: open edge, 11c: outer peripheral edge, 11d: fitting claw, 12: guide groove, 13: engaging hole, 14: engaging body, 14a: base, 14b: open end.

Claims (1)

[Scope of utility model registration request] In a foldable box in which a horizontally arranged bottom plate and a vertically arranged side plate are integrally and bendably connected at the upper edge of the bottom plate and the lower edge of the inner side of the side plate, A vertical rib is formed that protrudes from the bottom plate and extends in the vertical direction, and the lower end of the vertical rib projects downward from the connecting portion between the bottom plate and the side plate. Reinforcement of a folding box, characterized in that a recess is formed at the edge of the bottom plate, which is arranged substantially at the same level as the lower surface and corresponds to the lower end of the vertical rib, into which the lower end fits so that the lower end can come out and go out. Freshly used ribs.