JPS633932Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention relates to a synthetic resin transportation container (or packaging container, the same shall apply hereinafter) used for storing, transporting, and storing mechanical parts, etc. Furthermore, when storing items, the side wall plates stand upright in the box's original position, and when all the items are removed and the box is stocked or returned, each side wall plate falls inward and becomes flat. This invention relates to a foldable box whose bulk is reduced to a fraction of its original size when folded.

2. Description of the Related Art Various types of folding boxes are known in the art, in which the side wall plates on each of the four sides are folded down and folded flat.

For example, in the box described in JP-A-51-36374, as shown in FIG. The rigidity of the plates a is ensured by the coupling between the coupling pins c provided at each corner and the coupling holes d.

In addition, the box described in Japanese Patent Publication No. 54-25473 has each side wall plate a...
A lower side wall f formed in series is attached to the bottom plate h by a stopper pin g via a thin hinge e.

Furthermore, as shown in Figure 12, the box described in Japanese Patent Publication No. 55-26058 has each side wall plate a
The lower side wall f, which is formed in series, is connected to the bottom plate h via a hinge e', also via a hinge e'.

The box described in Utility Model Publication No. 53-164543 is
It is essentially a shallow box with short wall panels on all four sides that stand upright integrally with the bottom plate, and a part of the central part of the short side wall panels is cut out and connected directly to the bottom plate. It has a high side wall plate that can be opened and closed.

Problems to be solved by the present invention () In the case of the box described in the above-mentioned Japanese Patent Application Laid-Open No. 51-36374, a large number of pins b... are required in the manufacturing (assembly) process, and the parts management is difficult. It's a hassle. Furthermore, it is essential to form pin holes that coincide with each other in the bottom plate and the side wall plate a, which makes the forming process extremely complicated. Moreover, each side wall plate a
Since it is configured so that it can fall down not only inward of the box but also outward, in order to make the upright side wall plates a sturdy, connecting pins c and connecting holes d are indispensable at each corner. For this reason, the process of forming the side wall plate a becomes even more complicated, resulting in increased costs.
Moreover, once the connecting pins c and the connecting holes d are assembled, there is a problem in that each side wall plate a cannot be folded as desired.

() In the case of the box described in the above-mentioned Japanese Patent Publication No. 54-25473, the outward force (lateral pressure) exerted on each side wall plate a by the stored articles is applied directly to the thin hinge e, and is a structure that is added to the stop pin g. Moreover, since the lateral pressure acting on the side wall plate a acts directly on the thin hinge e and the stop pin g as so-called bending and shearing forces, the thin hinge e, which has a structure that is particularly vulnerable to external forces, is highly likely to be damaged. Therefore, it is not suitable for storing or transporting heavy items such as mechanical parts, and the problem is that the range of application is limited.

() Also in the case of the box described in the above-mentioned Japanese Patent Publication No. 55-26058, the side wall plate a
The structure is such that when outward lateral pressure is applied to it, the weak, thin hinge directly receives it, making it unsuitable for storing or transporting heavy objects. Furthermore, since both the side wall plate a and the lower side wall f have a structure that allows them to fall only outward, the side wall plate a is likely to fall down due to the lateral pressure of the stored items, and a strong coupling mechanism between the side wall plates is essential. Therefore, there is a problem in that once the side wall plate a is assembled in an upright state, it is difficult to fold it up and use it as desired.

() The box described in the above-mentioned Japanese Utility Model Publication No. 53-164543 is essentially a shallow box with immovable side walls, and the only wall plate that can be opened and closed simply collapses inside the box. The structure has nothing to do with the technical concept of sequentially folding the wall panels on all four sides flat.

Means for Solving the Problems As a means for solving the problems of the prior art, the foldable box according to the present invention has the following preferred embodiments as shown in FIGS. 1 to 9 of the drawings: In a synthetic resin foldable box that has a rectangular planar shape and can be folded flat by tilting the side wall plates 2, 2' and 3, 3' facing each other inward, (a) rectangular; Lower side walls 6, 7 and 8, 9 are integrally erected on the outside across a groove 5 having a width equivalent to the thickness of a separate side wall plate, which will be described later, along the outer periphery of the four sides of the bottom plate 1.

(b) Each side wall plate 2, 2' and 3 formed separately,
3', the lower end of each is connected to the groove 5 of the bottom plate 1.
The connecting protrusion 20 protruding downward from the lower edge of the groove is inserted into the connecting hole 19 provided at the bottom 18 of the groove, and is inseparably integrated into the inner side of the lower side walls 6, 7 and 8, 9, respectively. It was installed exactly.

(c) Each of the side wall plates 2, 2' and 3, 3' has a structure that covers the entire length of the lower part of the side wall plates 2, 2' and 3, 3', and also extends over the entire length of the bottom plate 1.
the lower side wall 6, 7 or 8, which is higher than the upper surface of the
Bend inward of the box at a position lower than the upper end of 9 by a certain dimension and at a height that allows the side wall plate to be folded over the side wall plate of the previous order folded onto the surface of the bottom plate 1. Thin hinges 10, 12 and 14, 15 with possible structures were formed, respectively.

(d) The outer surfaces of each side wall plate 2, 2' and 3, 3' are inscribed with lower side walls 6, 7 and 8, 9, respectively.
Ribs 11, 13 are placed at height positions that abut on top of the upper end flanges 6b, 7b or 8b, 9b, respectively.
16 and 17 were installed protrudingly. In addition, thin hinge 1
A dowel 21 that fits into the dowel hole 22 of the lower side wall 6, 7 or 8, 9 is provided at a position higher than 0, 12 and 14, 15.

Function Each side wall plate 2, 2' and 3, 3' has a thin wall hinge 1
By folding 0, 12, 14, and 15 inward in descending order, the four side wall plates can be folded into a flat stack on the surface of the bottom plate 1, and can be folded to the minimum bulk. . Therefore, return shipping and inventory of boxes can be carried out with minimum bulk and with high efficiency.

Moreover, in the folded state, even if a load is applied, the load is not applied to each of the side wall plates 2, 2' and 3.
The load is transmitted straight to the bottom plate 1 through the overlapping portion 3', so that any side wall plate is not partially deformed or damaged due to excessive loading.

The heights of the lower side walls 6, 7 and 8, 9 are equal to the heights of the thin hinges 1 of the side wall plates 2, 2' and 3, 3' inscribed therein, respectively.
Since it is higher by a certain dimension than the height positions 0, 12, 14, and 15, and is always higher than the top surface of the side wall plates folded in order, the boxes in the folded state can be stacked with their lower side walls in order, At this time, no load is ever applied to the side wall plates 2, 2' and 3, 3' of the lower boxes, allowing them to be stacked without any risk of deformation or damage.

Next, when each side wall plate 2, 2' and 3, 3' is stood upright, each lower side wall 6, which is inscribed therein,
The wall plate portions above the thin hinges 10, 12 and 14, 15 are tightly inscribed with respect to 7, 8, 9,
and ribs 11, 12 and 16, 17 abut on the upper end flanges 6b, 7b or 8b, 9b of each lower side wall, respectively, to define an upright position. In other words, the side wall plates are stiffened by exerting a back-up action that prevents each side wall plate from falling further outward, so it can withstand the lateral pressure of stored items and is suitable for storing and transporting fairly heavy items. can. Further, the vertical load when these boxes are stacked is transmitted to the lower side wall through the ribs of each side wall plate, so that the load is not applied to the thin hinge.

Furthermore, when each of the side wall plates 2, 2' and 3, 3' is stood upright, the dowels 21 are simultaneously attached to each lower side wall 6,
7, 8, and 9 fit into the corresponding dowel holes 22, so when the box is lifted by holding one of the side wall plates, the entire weight is handled by the shear stress of the dowels 21, and the dowel holes 22 formed below the dowels 21 are It does not act on thin hinges 10, 12 and 14, 15.

Example Next, the illustrated embodiment of this invention will be described.

FIG. 1 shows the collapsible box according to this invention in an exploded state, and FIGS. 2 to 4 show it in an assembled state.

This foldable box consists of one bottom plate 1 formed into a rectangle, and four side wall plates 2, 2' and 3, 3' formed separately from the bottom plate 1, each made of synthetic material such as polypropylene. Molded from resin.

Side wall plates 2 and 2' used on the long sides of the box,
And the side wall plates 3 and 3' used on the short side are:
They are each formed into substantially the same shape and assembled on the bottom plate 1 in such a manner that both end surfaces of the longer side wall plates 2, 2' are sandwiched between the shorter side wall plates 3, 3' (FIG. 2).

The rectangular bottom plate 1 has 4 holes along its outer periphery.
At a position on the outside with a groove 5 (FIG. 1, FIG. 7) having a width a corresponding to the thickness of the side wall plate 2, 2' or 3, 3' on the side, the vertical cross-sectional shape is approximately U-shaped outward. The lower side walls 6, 7 and 8, 9 forming a
and are integrally connected at the groove bottom 18.

The lower flanges 6a to 9a formed outward at the lower edges of the lower side walls 6 to 9 are positioned higher than the lower edge of the bottom plate 1 by approximately b=4 mm.
This step b allows the skirt-shaped reinforcing ribs 30 on the bottom plate 1 to
(Fig. 5) fits tightly inside the opening of the lower box, and the lower flanges 6a-9 of the lower side walls 6-9
Since the box a rests on the upper end of the lower side wall (or side wall plate) of the lower box, stable stacking is possible without the risk of shifting (Fig. 5).

On the other hand, the height of the lower side walls 6 to 9, that is, the height of the upper end flanges 6b to 9b, is the highest level when the side wall plates 2, 2' and 3, 3' inscribed in each are folded flat in order. Side wall plate (side wall plate 3, 3' in Figure 6)
It is formed slightly higher than the top surface.

Next, in the groove bottom 18 of the groove 5 in the bottom plate 1, that is, in the part that integrally connects the bottom plate 1 and each of the lower side walls 6 to 9, a long hole is formed at a position where the length of the groove 5 is divided into several equal parts. Connection holes 19... are provided (FIG. 8).

On the other hand, at the lower end of each side wall plate 2, 2' and 3, 3', at a position corresponding to the connecting hole 19..., an arrowhead shape is formed to prevent it from coming off, and the central part is cut out in an inverted U shape to provide appropriate flexibility. A connecting protrusion 20 having flexibility (elasticity) is provided downward. Each of the side wall plates 2, 2' and 3, 3' is connected to the bottom plate by first firmly inserting its lower part into the groove 5 around the bottom plate, and then fitting the connecting protrusion 20 into the connecting hole 19. 1 (Fig. 7, Fig. 8).

Each of the side wall plates 2, 2 and 3, 3 is provided with a hole located at a position extending over the entire length of the lower part in the longitudinal direction, higher than the upper surface of the bottom plate 1, and lower than the upper end of the lower side wall 6, 7 or 8, 9 by a certain dimension. and a thin-walled hinge 10, 12 or 14 having a structure that can be bent inward of the box at a height position where the side wall plate can be folded onto the side wall plate of the previous order folded onto the surface of the bottom plate 1, 15
are formed respectively.

To explain more specifically, the side wall plate 2 on the long side that is folded first is folded down so that it comes into close contact with the surface of the bottom plate 1 (FIG. 5), so that the side wall plate 2
The height position of the thin hinge 10 is at the same level as the top surface of the bottom plate 1.

The outer surface of this side wall plate 2 has a position (approximately 10 to 30 mm above the thin hinge 10) where the side wall plate 2 contacts the upper end flange 6b of the lower side wall 6 inscribed therein. <Rib 1
1 is horizontally protruded across the entire width of the side wall plate 2, and when the side wall plate 2 is vertically erected, the rib 11 just contacts the upper flange 6b. Therefore, the ribs 11 prevent the side wall plate 2 from falling further outward than the upright position. Moreover, the lateral pressure and downward force of the stored objects applied to the vertically erected side wall plate 2 are transmitted from the rib 11 to the lower side wall 6 and the bottom plate 1, and are processed.
No force is directly applied to the thin hinge 10.

Since the side wall plate 2' with the remaining longitudinal side is folded over the side wall plate 2 (FIG. 5), the height position of the thin hinge 12 is adjusted from the top surface of the bottom plate 1 to the entire side wall plate 2 in the priority order. It is formed at an upper position by a thickness c. Further, on the outer surface of this side wall plate 2', a rib 1 is provided which abuts on the upper end flange 7b of the lower side wall 7, which is inscribed in the side wall plate 2'.
3 protrudes horizontally, and when the side wall plate 2' is vertically erected, the rib 13 just touches the upper end flange 7 of the lower side wall 7.
It is configured to abut on top of b. Therefore, this side wall plate 2' is also prevented from falling outward from the vertically erected position, and the outward side pressure and downward force applied to this side wall plate 2' are transferred from the rib 13 to the lower side wall 7. The thin hinge 1
No direct force is placed on 2.

The side wall plate 3 on the short side that will be folded later,
3' is its height dimension, in particular each thin hinge 14,
The height of the portion above No. 15 is set to be 1/2 (or smaller) of the inner dimension in the longitudinal direction of the box.
Therefore, even if these side wall plates 3 and 3' are both folded inward into the box, they will not collide with each other, but will be folded so that they are in close contact with the surfaces of the previously folded side wall plates 2 and 2'. (Figure 6). Because of this premise,
The height position of the thin hinges 14, 15 of each side wall plate 3, 3' is formed at a position higher than the upper surface of the bottom plate 1 by the total thickness dimension d of the two longitudinal side wall plates 2, 2'. (Figure 6). Further, on the outer surfaces of these side wall plates 3, 3', horizontal ribs 16, 17 are provided which abut on the upper end flanges 8b, 9b of the lower side walls 8, 9 inscribed with each side wall plate 3, 3'. It is installed protrudingly. Therefore, when each side wall plate 3, 3' is vertically erected, the ribs 16, 17 just abut on the upper end flanges 8b, 9b of each lower side wall 8, 9, and each side wall plate 3, 3' It is prevented from falling further outward. In addition, each side wall plate 3, 3'
The outward lateral pressure and downward force applied to rib 1
6, 17 to the bottom side walls 8, 9 and processed.
No direct force is applied to the thin hinges 14, 15.

Next, dowels 21 projecting outward are provided at positions above the thin hinges 10, 12 or 14, 15 on the outer surface of each side wall plate 2, 2' and 3, 3'. On the other hand, dowel holes 22 are provided in the vertical wall portions of each of the lower side walls 6 to 9 at positions corresponding to the dowels 21 of the side wall plate, into which the dowels 21 can freely enter and exit.

In other words, when the side wall plates 2, 2' or 3, 3' are vertically erected, the dowels 21 always fit into the dowel holes 22, so that any one of the side wall plates 2, 2' or 3,
The weight when lifting the box by holding the box 3' is handled by the shear stress of the dowel 21 inserted into the dowel hole 22, and the weight is absorbed by the thin hinges 10, 12 or 14 of each side wall plate.
There is no need to directly apply force to 15.

Next, both ends of the side wall plates 2, 2', which face each other in parallel along the longitudinal sides of the box, are sandwiched between the side wall plates 3, 3' on the shorter sides (FIG. 2). On this premise, reinforcing ribs 23 projecting outward at right angles are formed on both side edges of the longitudinal side wall plates 2, 2'. On the other hand, a hook 24 for holding the reinforcing rib 23 is formed on the short side wall plates 3, 3' (FIG. 9). However, among the reinforcing ribs 23,
The portion 23' held by the latch hook 24 is recessed by an amount corresponding to the wall thickness of the latch hook 24 (the first
(Fig. 9), and a retaining protrusion 25 is formed on its outer edge (Fig. 9). On the other hand, the latching hook 24
A thick wall portion 26 is formed at the inner edge of the tip of the slider to restrain the retaining convex portion 25 (Fig. 9). The side wall plate 2 or 2' is constructed to be strong enough to maintain its upright state even if it receives an inward external force.

As shown in FIG.
Holes 29, 29 are formed in the upper center of the side wall plates 3, 3' on the shorter sides to serve as handle portions.

A skirt-like reinforcing rib 30 that stands vertically downward is provided around the lower edge of the bottom plate 1, and in particular, the reinforcing rib 30 in the longitudinal direction prevents lower boxes (in FIG. A notch 3 with sufficient width and depth to accommodate the ribs 17 or reinforcing ribs 28, 28 standing perpendicularly from the side wall plates 3, 3' in the short direction of the solid line box) is placed at the position where they abut.
1 and 32 are provided (Fig. 6). Therefore,
Shearing movement between the stacked boxes is reliably prevented, and the stability of the stacked state is achieved.

Effects of the invention As described above in detail together with the embodiments, the folding box according to this invention has a bottom plate 1
and four side wall plates 2, 2', 3, 3', total 5
Since it is composed of parts and has a simple assembly type structure that does not require any other attached parts, it is easy to mold with synthetic resin and can be manufactured at low cost.

Each side wall plate 2, 2' and 3, 3' can be folded inward of the box, and when the thin hinges 10, 12 and 14, 15 are folded inward in order from the lowest height to the bottom plate 1. It can be folded tightly against the surface and folded into an overlapping state. That is, since it can be folded to a minimum volume, this folded state allows for highly efficient inventory and return shipping, which is economical.

Moreover, even if a load were to be applied to each folded side wall plate for some reason, the structure prevents local bending or other excessive force from being applied to each side wall plate, resulting in damage or damage. There is no need to worry about deformation etc. Of course, a box with folded side wall plates has a structure in which no load is applied to each folded side wall plate as long as the lower side walls 6, 7 and 8, 9 are stacked vertically, so it is suitable for stacking. Moreover, a stable stacking state can be obtained, and the applicability to multi-level stacking is excellent.

When the side wall plates 2, 2' and 3, 3' are vertically erected, they are inscribed in the lower side walls 6, 7 and 8, 9 and are backed up to prevent them from falling further outward, and at the same time the ribs 11 ,13 and 16,1
7 comes into contact with the upper end flanges 6b, 7b and 8b, 9b of each of the lower side walls 6, 7 and 8, 9 and prevents them from falling further outward, resulting in a structure that is strong and robust against the lateral pressure of the contents. Yes, suitable for storing heavy items. Moreover, the load when these boxes are stacked is always transferred from the ribs to the lower side wall, and the thin hinges 10, 12 and 14, 15
Since it has a structure that does not place any load on it, it can be applied to quite heavy objects in this sense as well.

When each side wall plate 2, 2' and 3, 3' is stood upright, the dowel 21 will definitely fit into the dowel hole 22, so
The weight when lifting a lever box with either side wall plate is handled by the shear stress of the dowel 21,
After all, the structure does not apply any load to the thin hinge, so in this sense as well, it has excellent applicability for storing heavy objects.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of the box of this invention, Figs. 2 to 4 are a plan view, a half-sectional front view, a half-sectional right side view, and a half-sectional front view and a half-sectional right side view of the box. 5 is a cross-sectional view corresponding to the - arrow view in FIG. 2 and showing the folded state of the side wall plate, and FIG. 6 is a cross-sectional view corresponding to the - arrow view in FIG. 2 and showing the side wall plate in the folded state. Fig. 7 is an enlarged view of the middle part of Fig. 5, Fig. 8 is a - arrow view of Fig. 7, Fig. 9 is a - arrow view of Fig. 3, and Figs. 10 to 12 are explanatory diagrams of the conventional example. It is.

Claims (1)

[Claims for Utility Model Registration] A folding type made of synthetic resin that has a rectangular planar shape and can be folded flat by tilting inward each side wall plate 2, 2' and 3, 3' facing each other in parallel. In the box, (a) Lower side walls 6, 7 and 8, 9 are integrated along the outer periphery of the four sides of the rectangular bottom plate 1 on the outside across a groove 5 with a width equivalent to the thickness of the separate side wall plate described later. (b) Each of the separately molded side wall plates 2, 2' and 3, 3' has its lower end inserted into the groove 5 of the bottom plate 1, and its lower end A connecting protrusion 20 projecting downward from the edge is fitted into a connecting hole 19 provided in the groove bottom 18, and is inseparably and integrally attached to the inner side of the lower side walls 6, 7 and 8, 9, respectively. Each side wall plate 2, 2' and 3, 3' has a position that is higher than the upper surface of the bottom plate 1 and lower than the upper end of the lower side wall 6, 7 or 8, 9 by a certain dimension over the entire length in the longitudinal direction of the lower part thereof. And bottom plate 1
Thin hinges 10, 1 having a structure that can be bent inward of the box at a height position where the side wall plate can be folded onto the side wall plate of the previous order folded onto the surface of the box.
(d) Lower side walls 6, 7 and 8, which are inscribed on the outer surface of each side wall plate 2, 2' and 3, 3', are respectively formed.
Ribs 11, 13 are placed at height positions that abut on the upper end flanges 6b, 7b and 8b, 9b of 9, respectively.
and 16, 17 are provided protrudingly, and the thin hinge 1
A folding box characterized in that dowels 21 that fit into dowel holes 22 of lower side walls 6, 7 and 8, 9 are provided at positions higher than 0, 12 and 14, 15.