JP3275131B2 - Synthetic resin storage container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a storage container made of synthetic resin, and more particularly, to a case where hinges are integrally formed at required positions between a plurality of plate-like bodies, and each hinge is bent at a substantially right angle. The present invention relates to a synthetic resin container that can be assembled in a box shape.

[0002]

2. Description of the Related Art As a synthetic resin storage container, hinge portions are integrally formed at required positions between bottom plates, four peripheral side plates, and respective plate-like bodies serving as lid plates, and each hinge portion is bent at a substantially right angle. 2. Description of the Related Art A structure that is assembled in a box shape is known.

[0003]

However, conventional storage containers made of synthetic resin having the above-mentioned structure have not been considered much when they are stored or transported in a stacked state.

[0004] Therefore, the present invention, when assembled,
Even when unfolded, it can be stacked in a stable state,
It is still another object of the present invention to provide a synthetic resin container capable of rotating the lid plate to a position along the side plate.

[0005]

In order to achieve the above-mentioned object, a synthetic resin container according to the present invention comprises a bottom plate made of a plate-like body, and side plates and a lid plate around the bottom plate, each bent by a hinge. Connectable as possible, in a synthetic resin container assembled in a box shape by bending each hinge portion at a substantially right angle from the unfolded state where the hinge portion is linear, on the upper surface of the lid plate and the lower surface of the bottom plate, When the storage containers are stacked, a convex portion and a concave portion which fit each other are provided, and the outer surface of the side plate corresponds to the position of the convex portion when the lid plate is rotated to a position along the side plate. It is characterized in that a recess is provided. Further, the present invention is characterized in that when the containers in the unfolded state are stacked on the lower surface of the lid plate, a concave portion is provided in which a convex portion on the upper surface of the lid plate can be fitted, and A concave portion for forming a handle portion is provided on the outer surface at a position corresponding to a rotation end of the lid plate when the lid plate is rotated to a position along the side plate.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail with reference to the drawings. FIG. 1 is a perspective view showing one embodiment of the synthetic resin container of the present invention, and FIG. 2 is a plan view showing the same expanded state. FIG. 3 is a cross-sectional view of a main part of the lid plate, FIG. 4 is a cross-sectional view showing a state where storage containers are stacked, and FIGS. 5 and 6 are positional relationships between a convex portion on the upper surface of the lid plate and a concave portion on the lower surface of the bottom plate. FIG. 7 is a plan view showing a state in which storage containers are stacked alternately, and FIG. 8 shows a relationship between a convex portion on the upper surface of the lid plate and a concave portion of the side plate when the lid plate is opened. FIG. 9 is a cross-sectional view of the main part showing the relationship between the lid plate and the concave part provided on the side plate, and FIG. 10 is a cross-sectional view of the main part showing a state where the expanded storage containers are stacked. 11 and 12 are sectional views showing the relationship between the side plate and the bottom plate at the time of assembly, FIG. 13 is a sectional view showing the relationship between the short side plate and the cover plate when the cover plate is closed, and FIG. It is sectional drawing of the principal part which shows the relationship between side plates.

First, in the synthetic resin container shown in this embodiment, a parison made of polyethylene, polypropylene, or the like is mounted in a mold having a predetermined shape, and each plate is hollowed by blowing high-pressure gas into the parison. It is obtained by blow molding into a shape and integrally forming a hinge portion between each plate-like body, and as shown in FIGS.
Short side plates 2 and 2 connected to the short side of the bottom plate 1, long side plates 3 and 3 connected to the long side, and lid plates 4 and 4 connected to both side plates 3 and 3, It has bendable hinge portions 5 and 5 provided between the plate-like bodies 1, 2, 3 and 4. The storage container made of synthetic resin can be assembled into a box shape as shown in FIG. 1 by bending the hinge portions 5 and 5 from the unfolded state shown in FIG. 2 at substantially right angles. In addition, a plurality of ribs 6 and 6 and reinforcing holes 7 for reinforcement are provided at appropriate positions on each plate-like body, and a contact portion of each side plate has
Engaging portions 8 are provided for fixing the side plates in an assembled state. Further, the length-width ratio of the storage container, that is, the width ratio of the short side plate 2 to the long side plate 3 is 1: 2.
Is set to

The base of the cover plate 4 is connected to the upper end of the long side plate 3 via a hinge portion 5, and the distal ends of both cover plates 4 have arc-shaped irregularities as shown in FIG. A fitting portion 9 is formed. The concave-convex fitting portion 9 has a shape that can be fitted to each other when the lids 4 are closed, and is formed in a shape that does not greatly affect the opening / closing operation of the lid 4.
When the cover is closed, the concave-convex fitting portion 9 is fitted to prevent a gap from being generated between the lid plates 4 and 4. The outer wall 4a on the upper surface of the cover plate 4 is formed with a convex portion 10 that bulges the outer wall 4a upward, and the inner wall 4b is formed on the inner wall 4b on the lower surface of the lid plate 4. A concave portion 11 is formed so as to be fittable.

Further, on the lower surface of the bottom plate 1, there are provided one short side recess 12 provided in the center near the short side plate, and two long side recesses 13 provided in the vicinity of the long side plate. Are formed. These recesses 12 and 13 are obtained by indenting the outer wall 1a of the bottom plate 1 inward, and as shown in FIG. It is formed in a size that can be made.

[0010] As shown in FIG.
Is formed at a position corresponding to the convex portion 10 of the lid plate 4. When the storage containers are stacked in the same direction, that is, when the storage containers are stacked, the convex portion 10 and the short side concave portion 12 are fitted. In addition, it is set so that the lateral displacement of the storage container can be prevented.

As shown in FIG. 6, when the storage containers are stacked on the storage container by changing the direction by 90 degrees, the protruding portion 10 of the lower storage container is moved upward. It is provided at a position where it fits into one of the long side recesses 13 of the storage container. Therefore, since the length-to-width ratio of the storage containers is set to 1: 2, as shown in FIG. 7, when the storage containers are stacked two by two while changing the direction by 90 degrees, that is, when the storage containers are alternately stacked. Since the protrusions 10 of the lower storage container are fitted into the long-side recesses 13 located outside when the upper storage container is stacked, the lateral displacement of the storage container is reduced in the same manner as when the storage containers are stacked. Can be prevented and stacking can be performed in a stable state.

An outer wall 3a is provided on the outer surface of the long side plate 3.
Is recessed inward. As shown in FIG. 8, the concave portion 13 corresponds to the position of the convex portion 10 when the cover plate 4 is rotated to a position along the outer surface of the long side plate 3, and corresponds to the shape of the convex portion 10. An engaging portion 15 is provided on the side surface of the concave portion 14 and the side surface of the convex portion 10 to engage with each other to fix the cover plate 4.

That is, when the cover plate 4 is opened, the projection 1
0 enters the recess 14 so that the lid plate 4 is
Can be rotated 270 degrees to a position along the outer surface of
In addition, the engaging portions 15 are engaged with each other so that the cover plate 4
Can be fixed in its open position. This allows
The lid plate 4 does not become an obstacle when taking in and out the stored items, and the lid plate 4 does not flutter even when transported with the lid plate 4 opened.

Further, as shown in FIG. 9, the center of the outer surface of the long side plate 3 is provided at the rotation end 4c of the cover plate 4 when the cover plate 4 is rotated to a position along the outer surface of the long side plate 3. At a corresponding position, a concave portion 16 for forming a hook portion is provided. The concave portion 16 is formed by denting the outer wall 3a inward similarly to the concave portion 14, and is set to have a shape capable of forming a gap into which a fingertip can be inserted between the rotating end 4c and the outer wall 3a. .

As described above, by providing the concave portion 16 corresponding to the rotating end portion of the lid plate 4 at the open position, the concave portion 16 can be used as a handle portion when closing the lid plate 4.
This gap can be used not only to improve workability but also to close the cover plate 4 with an automatic machine or the like.

Further, by providing a concave portion 11 in which the convex portion 10 can be fitted on the lower surface of the cover plate 4, as shown in FIG.
As a result, a large number of storage containers in the unfolded state can be stored and transported in a stacked state, thereby greatly improving the stability.

Further, as shown in FIGS. 11 and 12,
The storage container shown in this embodiment employs a shape in which a load is not applied to the hinge portion 5 at the contact portion between the bottom plate 1 and each of the side plates 2 and 3. For example, in the case of the short side plate 2 shown in FIG. 11, a horizontal contact portion 1 is provided between the end of the bottom plate 1 and the lower end of the short side plate 2.
7 are formed. Thereby, the load applied to the short side plate 2 from above the storage container can be received by the horizontal contact portion 17, and the load can be prevented from being applied to the hinge portion 5.

In the case of the long side plate 3 shown in FIG. 12, a contact portion 18 having a downward slope toward the inside of the container is formed at the end of the bottom plate 1 and the end of the long side plate 3. By forming in this manner, it is possible to prevent the load from being applied to the hinge portion 5 by receiving the load from above by the contact portion 18 and to press the lower end of the long side plate 3 toward the inside of the container. Therefore, it is possible to prevent the long side plate 3 from moving in the direction away from the bottom plate 1.

Further, as shown in FIG. 13, a contact portion between the short side plate 2 and the cover plate 4 is provided with a ridge 19 extending from the inside of the container of the short side plate 2 at an end of the cover plate 4. The groove 21 is provided with an engaging step 21 that engages with the ridge 19 and the groove 20. This allows
The cover plate 4 can be protected from the impact from the side, and the short side plate 2 and the cover plate 4 can be securely fixed without any gap.

As shown in FIG. 14, a contact portion between the short side plate 2 and the long side plate 3 has a ridge 2 projecting from a side edge of the short side plate 2.
2 is formed so as to fit into a concave groove 23 provided at an end of the long side plate 3. As a result, the both side plates 2 and 3 can be fixed to each other, so that it is possible to prevent rattling of the both side plates 2 and 3 and to prevent a gap from being generated between the both side plates.

The shape and structure of the storage container in detail are not limited to the above-described embodiment, but can be formed in an appropriate shape and structure according to the type and shape of the storage object and the required strength. For example, without joining all the plate-like bodies at a hinge part integrally molded, forming some plate-like bodies separately,
This may be connected by an appropriate hinge member.

[0022]

As described above, according to the synthetic resin container of the present invention, it is possible to stack in a stable state even when assembled and unfolded, and to store and transport. Can be performed efficiently. In addition, since the cover plate can be rotated 270 degrees to a position along the side plate, the cover plate does not become an obstacle when taking in and out of stored items.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a synthetic resin container according to the present invention.

FIG. 2 is a plan view similarly showing a developed state.

FIG. 3 is a sectional view of a main part of a lid plate.

FIG. 4 is a cross-sectional view showing a state where storage containers are stacked.

FIG. 5 is a plan view for explaining a positional relationship between a convex portion on an upper surface of a cover plate and a concave portion on a lower surface of a bottom plate.

FIG. 6 is a plan view for explaining a positional relationship between a convex portion on the upper surface of the lid plate and a concave portion on the lower surface of the bottom plate.

FIG. 7 is a plan view showing a state where storage containers are alternately stacked.

FIG. 8 is a cross-sectional view of a main part showing a relationship between a convex portion on the upper surface of the lid plate and a concave portion on the side plate when the lid plate is opened.

FIG. 9 is a cross-sectional view of a main part showing a relationship between a lid plate and a concave portion provided on a side plate.

FIG. 10 is a cross-sectional view of a main part showing a state when the expanded storage containers are stacked.

FIG. 11 is a sectional view showing a relationship between a short side plate and a bottom plate at the time of assembly.

FIG. 12 is a cross-sectional view showing the relationship between the long side plate and the bottom plate during assembly.

FIG. 13 is a cross-sectional view showing a relationship between the short side plate and the cover plate when the cover plate is closed.

FIG. 14 is a sectional view of a main part showing a relationship between side plates at the time of assembly.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... bottom plate, 2 ... short side plate, 3 ... long side plate, 4 ... lid plate, 5 ... hinge part, 6 ... rib, 7 ... handle hole, 8 ... engaging part, 9 ... concave and convex fitting part, 10 ... convex part , 11: concave portion, 12: short side concave portion, 13: long side concave portion, 14: concave portion, 15: engaging portion, 1
6 ... concave part, 17, 18 ... abutting part, 19 ... convex ridge, 20 ...
Concave groove, 21: engaging step, 22: convex ridge, 23: concave groove

────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hisashi Nakajima 2480 Mado, Hiratsuka-shi, Kanagawa Pref. Inside the Hiratsuka Plant of Mitsubishi Plastics Corporation (56) References JP-A-9-309530 (JP, A) −19840 (JP, U) Japanese Utility Model Showa 48-52729 (JP, U) Special Table Hei 7-507260 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B65D 6/18 B65D 21/02

Claims (3)

(57) [Claims] 1. A bottom plate made of a plate-like body, and side plates and a cover plate on four sides of the bottom plate are connected to each other so as to be bendable by hinges. In a synthetic resin container that is assembled into a box shape by folding it into a box shape, the upper surface of the lid plate and the lower surface of the bottom plate are provided with a convex portion and a concave portion that fit together when the containers are stacked. , On the outer surface of the side plate,
A synthetic resin container having a concave portion corresponding to the position of the convex portion when the lid plate is rotated to a position along the side plate. 2. The combination according to claim 1, wherein a concave portion is provided on a lower surface of the lid plate, into which a convex portion on the upper surface of the lid plate can be fitted when the containers in an unfolded state are stacked. Resin storage container. 3. A concave portion for forming a hand-holding portion is provided on an outer surface of the side plate at a position corresponding to a rotation end of the cover plate when the cover plate is rotated to a position along the side plate. The storage container made of synthetic resin according to claim 1, characterized in that: