JPH08192846A - Container for transportation - Google Patents

Abstract

PURPOSE: To prevent containers for transportation which have been vertically stacked in multiple stages from being unfastened and shifted due to lateral shift. CONSTITUTION: An upper protrusion 6 for positioning is formed on an upper face of an upper flange 4 of each of opposite side walls 3a, 3b of a container body 1A. Each protrusion 6 is inclined at each different angle with respect to a line M perpendicularly connecting between the side walls 3a, 3b. A lower recess to be fitted with the upper protrusion 6 is formed on a lower face of a lower flange of each of the side walls 3a, 3b. Even if external force or vibration from a lateral direction is applied, fitting between the protrusion 6 and the recess prevents disengagement. Thus containers 1 for transportation which have been stacked in multiple stages can be prevented from being unfastened and shifted due to lateral shift, thereby protecting contents P.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a storage container for accommodating precision parts such as semiconductors, documents, foods and the like, which are vertically stacked.

[0002]

2. Description of the Related Art Conventionally, as a storage container of this type, as shown in FIGS. 6 to 8, for example, a side wall 3 of a container body 1A, which is composed of a bottom wall 2 and four side walls 3a to 3d, faces each other.
On the upper surface of the upper flange 4 ″ of a and 3 b, the opposite side wall 3
a recess 3 ″ for positioning is formed in a direction parallel to a line M perpendicular to a and 3 b, and the side walls 3 a and 3 a facing each other are formed.
Lower protrusions 5 ″ of the upper flange 3 ″ are formed on the lower flange 5 ″ of the upper flange 3 ″, respectively. A configuration is known in which the upper flange 4 ″ of the 1 ′ and the recess 7 ″ of the upper flange 4 ″ are fitted to each other to be stacked in multiple stages in the vertical direction. Further, as shown in Japanese Utility Model Publication No. 54-14592 shown in FIG. Locking pieces f are formed on the upper flange of the container 1 ″ at appropriate intervals, and the locking pieces f surround the bottom peripheral portion of the upper storage container 1 ″ to position the upper storage container 1 ″. There is a known form.

[0003]

However, as shown in FIGS.
In the concavo-convex fitting structure shown in, the convex portion 6 ″ and the concave portion 7 ″ for fitting are provided.
Since they are formed in the same direction and at the same angle, the concave-convex fitting portion 6 with respect to the storage container 1'when carrying the storage containers 1 ', which are stacked vertically, or storing them in a warehouse, for example. External force is applied in the direction parallel to ", 7",
Alternatively, if a slight lateral vibration is applied during the transportation of the storage container 1 ', the fitting of the concave-convex fitting portions 6 and 7 is likely to be disengaged due to the external force or vibration, and the storage containers stacked vertically There is a concern that 1'will slip sideways and the load may collapse.
Moreover, in order to facilitate the fitting of the convex portion 6 ″ and the concave portion 7 ″, generally, as shown in FIG. 8, the inner width of the concave portion 7 ″ is slightly larger than the outer width of the convex portion 6 ″. Then, the uneven fitting part 6 ",
A small gap G (about 1 mm) is secured in 7 ",
For example, when the storage containers 1'are stacked in 10 layers, the vertical line L
An overall inclination of about 10 mm (= 1 mm x 10) with respect to (Fig. 7) occurs, and about 20 mm when 20 layers are stacked.
(= 1 mm × 20), the whole inclination will occur,
There is a problem that the horizontal inclination angle H of the storage container 1'becomes large, the balance of the storage container 1'becomes unbalanced, and the load collapse due to the lateral shift is more likely to occur. Further, when the storage container 1'is a molded product, the convex portion 6 "for fitting and the concave portion 7" do not coincide with each other due to contraction due to physical properties after the container is molded, so that the convex portion 6 "and the concave portion 7" are formed. Since fitting may not be possible, in consideration of this, it has been necessary to mold with a gap G larger than necessary.

On the other hand, in the storage container 1 "shown in FIG. 9 in which the locking piece f is formed on the flange, the bottom of the storage container 1" in the upper stage is held by the locking piece f standing upright on the flange at a distance. Since the upper storage container 1 ″ is positioned by surrounding the peripheral portion, external force is concentrated on the locking piece f when lateral vibration is applied while the storage container 1 ″ is being transported. Moreover, when the storage container 1 ″ is a molded product, the strength of the locking piece f is weak and the locking piece f is easily broken by an external force.

As a result, any of the conventional storage containers 1 ',
Even with 1 ″, it is easy to cause a load collapse during transportation,
In particular, it was not suitable for carrying precision parts. The present invention has been made in view of the above-described conventional problems, and an object thereof is to prevent load collapse due to lateral displacement of storage containers stacked in a multi-tiered manner, and to ensure the protection of contents. The present invention provides a storage container for transportation.

[0006]

In order to solve the above-mentioned problems, the present invention relates to the respective upper edges of the opposite side walls 3a and 3b of the container body 1A consisting of the bottom wall 2 and the four side walls 3a to 3d. One of the upper convex portion 6 or the concave portion for positioning is formed, and the upper convex portion 6 or the concave portion is formed on the opposing side wall 3
The side walls 3a and 3b are formed so as to be inclined at different angles with respect to a line M connecting the a and 3b at a right angle.
One of the features is that one of the lower concave portion 7 and the convex portion that fits with the upper convex portion 6 or the concave portion is formed in the vicinity of the lower edge portion, respectively.

It is preferable that the upper convex portion 6 or the concave portion is formed so as to be inclined toward the center point N of the upper opening of the container body 1A.

[0008]

According to the present invention, however, the bottom wall 2 and the four side walls 3a are formed.
To side walls 3a, 3 of the container body 1A which are composed of
An upper convex portion 6 (or a concave portion) for positioning is formed at each upper edge portion of b, and different angles are formed with respect to a line M connecting the upper convex portions 6 at right angles between the side walls 3a and 3b facing each other. Side walls 3a, 3 facing each other
By forming the lower concave portions 7 (or the convex portions) that fit with the upper convex portions 6 in the vicinity of the lower edge portion of b, for example, the storage containers 1 stacked vertically can be transported or stored in a warehouse. Even when an external force is applied to the storage container 1 in a direction parallel to the concave-convex fitting portions 6 and 7 or a lateral microvibration is applied during transportation, The lateral displacement of the concave and convex fitting portions 6 and 7 of the side wall 3a is caused by the concave and convex fitting portions 6 and 7.
7, the concave and convex fitting portions 6, 7 of the other side wall 3b having different inclination angles
Can be prevented, and lateral displacement of the uneven fitting portions 6, 7 of the other side wall 3b can be prevented by the uneven fitting portions 6, 7 of the one side wall 3a. As a result, the unevenness can be obtained even if external force or vibration is applied from any direction. There is no concern that the fitting portions 6 and 7 will be disengaged, and the lateral displacement of the multi-tiered storage containers 1 can be reliably prevented.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 and 2, the transport storage container 1 of the present embodiment has a flat bottom wall 2 and four side walls 3a to 3d that are erected from the ends of the bottom wall 2 and open upward. The container body 1A made of the synthetic resin is formed. Container body 1A
Upper flanges 4 are provided on the upper edge portions of the four side walls 3a to 3d of the upper flange 4 toward the outside of the container body 1A.
On the upper surfaces of the two sides 4a, 4b facing each other, three positioning projections 6 are provided at intervals in the length direction of each side 4a, 4b.
6'is formed respectively. These protrusions 6 and 6'are each formed in a triangular shape in cross section, and are inclined at different angles with respect to the line M connecting the side walls 3a and 3b facing each other at right angles. ing. In this embodiment, the ridgelines of the protrusions 6 and 6 located on both sides are angled about 45 ° toward the center point N of the upper opening of the container body 1A.
They are inclined at ₁ and θ ₂ , respectively. In other words, the container body 1
The ridgelines of the convex portions 6 and 6'are formed on the radiation extending radially through the center point N of A, respectively. The ridgeline of the convex portion 6'located on the center side is at an angle different from that of the convex portions 6 and 6 (an angle parallel to the line M that connects the opposing side walls 3a and 3b at a right angle) to the upper opening of the container body 1A. Is directed to the center point N of.

On the other hand, at the lower edges of the four side walls 3a to 3d of the container body 1A, a lower flange 5 is provided so as to extend toward the outside of the container body 1A in a continuous manner with the end of the bottom wall 2 of the container body 1A. The upper convex portion 6 on the lower surface of the lower flange 5,
At the positions corresponding to 6 ', respectively, groove-shaped recesses 7 and 7'having a triangular cross-section that are fitted vertically with the upper protrusions 6 and 6'are formed. The groove forming direction of these concave portions 7 and 7'is inclined in the same direction and at the same angle as the upper convex portions 6 and 6 ', in other words, it passes through the center point N of the container body 1A and is radially formed. Grooves of concave portions 7 and 7'are formed along the extended radiation. Thereby, the plurality of storage containers 1
Storage container 1 located at the top when stacking stacks vertically
The protrusions 6 and 6'of the upper flange 4 of the storage container 1 located below the respective recesses 7 and 7'of the lower flange 5 can be fitted vertically, and the concave and convex fitting portions 6, 7 '; 6 ', 7'
With this structure, lateral displacement of each storage container 1 can be prevented.

Here, in order to make it easier to fit the convex portions 6 and 6'and the concave portions 7 and 7'having a triangular cross-section, and in consideration of shrinkage due to the material (molded product) of the container 1. , Fig. 2
(A), the the angle w ₂ 'of the recess 7 of the angle w ₁ and lower (as well (7 over the convexity 6 6)' as well) w
_It is preferable to set the relationship of ₁ <w ₂ , and in order to prevent rattling due to contraction deformation of the upper flange 4, the height t of the convex portions 6 and 6'and the depth of the concave portions 7 and 7 ' It is preferable to set the relationship of d>t> d. Furthermore, FIG.
As shown in (a), the convex portion 6 and the concave portion 7 are formed by reinforcing ribs 12.
May be connected to improve the strength of the concave and convex fitting portions 6 and 7. 3 (b) shows a bar code display portion 11 recessed on the outer surface of the side wall, FIG. 3 (c) shows the cross-sectional shape of the upper flange 4, and FIG. 3 (d) shows the drain hole 10 and
The drainage hole 10 is an upper flange 4 formed in a hook shape in cross section.
It also has a function as a positioning hole for preventing the molding die (core) from falling over or shifting during molding. Further, (e) shows the cross-sectional shape of the convex portion 6.

Therefore, when the contents P are stored in the storage container 1 and stacked vertically, the convex portions 6, 6'of the upper flange 4 of the lower storage container 1 and the upper storage container 1 are stacked. By fitting the recesses 7 and 7'of the lower flange 5 into the recesses 7 and 7 ', respectively, it is possible to stack the required number of storage containers 1 in the vertical direction and transport them, or store them in a warehouse. At this time, for example, even when an external force is applied to the storage container 1 in a direction parallel to the concave-convex fitting portions 6 and 7, or a slight lateral vibration is applied during transportation, for example, as shown in FIG.
The lateral displacement of the concave-convex fitting portions 6 and 7 of one side wall 3a indicated by the arrow X can be prevented by the concave-convex fitting portions 6 and 7 of the other side wall 3b having a different inclination angle from the concave-convex fitting portions 6 and 7, and The lateral displacement of the concave-convex fitting portions 6, 7 of the other side wall 3b shown by the arrow Y in FIG. 4 can be prevented by the concave-convex fitting portions 6, 7 of the one side wall 3a, and further the concave-convex fitting portions 6 ', 7'. The lateral deviation can be prevented by the concave-convex fitting portions 6 and 7, and as a result, there is no concern that the concave-convex fitting portions 6 and 7 will be disengaged from any direction when external force or vibration is applied. Moreover, since the positioning convex portion 6 and the concave portion 7 are formed to be inclined, the lengths of the concave portion 7 and the convex portion 6 can be increased without increasing the flange width, and accordingly, the convex fitting portion is formed. The fitting area of 6 and 7 is increased, and the fitting force of the storage container 1 can be increased.

As a result, the storage containers 1 which are vertically stacked in multiple stages
There is no risk of the contents P falling or being damaged due to the collapse of the load, and the contents P can be protected completely. Moreover, when the storage container 1 is a molded product, the storage container 1 of the present invention can be easily formed by merely changing the design of a part of the molding die (the portions where the convex portion 6 and the concave portion 7 are formed). Therefore, it is not necessary to significantly change the design of the molding die, and the increase in cost can be suppressed.

Moreover, a pair of the above-mentioned (three pairs in this embodiment) positioning projections 6, 6'and recesses 7, 7'on the radiation extending radially through the center point N of the container body 1A. By respectively forming and, when the storage containers 1 are stacked in multiple stages, even when the storage containers 1 on the upper stage are inverted 180 ° in the horizontal direction about the center point N as an axis, they are fitted on the storage container 1 on the lower stage. Can be combined. That is, since the upper storage container 1 can be fitted with the lower storage container 1 in any of the two states in which the upper storage container 1 is horizontally inverted by 180 °, it is possible to reduce the time required for multi-stage stacking. In addition, even if external forces or vibrations are applied from the lateral direction to the storage containers 1 that are stacked vertically, these concave and convex fitting portions 6, 7; 6 ', 7'can evenly receive these external forces and vibrations. With such a structure, it is possible to more effectively prevent the collapse of the load due to the lateral displacement of the storage container 1.

By the way, in the prior art, since the fitting convex portion and the concave portion have a quadrangular cross section, when the convex portion and the concave portion are fitted with a gap (see FIG. 7), they are stacked in multiple stages. Occurrence of rattling in the lateral direction of the entire storage container is unavoidable, and easily collapses the load, whereas in this embodiment,
Since the convex portions 6 and 6 ′ for positioning and the concave portions 7 and 7 ′ each have a triangular cross-sectional shape, no gap is formed in the concave and convex fitting portions 6 and 7, and the vibration of the entire multi-stacked storage containers 1 is prevented. It is possible to effectively prevent rattling, and it is possible to prevent not only the collapse of the load of the storage container 1 but also the slight vibration of the storage container 1 at the same time. Moreover, by making the angle w ₁ of the upper convex portions 6, 6 ′ smaller than the angle w ₂ of the lower concave portions 7, 7 ′, it is possible to deal with the shrinkage of the molded product (storage container 1), and
By making the height t of the convex portions 6 and 6 ′ higher than the depth d of the concave portions 7 and 7 ′, it is possible to prevent rattling due to shrinkage deformation of the upper flange 4. In this way, the convex parts 6, 6 '
By making the cross-sectional shapes of the concave portions 7 and 7'and the triangular shape, it is possible to prevent the fitting deviation of the concave and convex dimensions caused by the shrinkage due to the physical properties of the container body 1A after molding, and to store the heavy objects. The convex portions 6 and 6'and the concave portions 7 and 7'are engaged with each other, so that it is possible to reliably prevent disengagement during multi-stage stacking. In addition, as shown in FIG. 1, by forming a large number of ribs 13 on the lower surface side of the bottom wall 2 in a vertical and horizontal matrix, there is an advantage that the strength of the entire bottom wall 2 can be improved with less material.

In the above embodiment, the convex portion 6 and the concave portion 7 are
Inclining in the direction toward the center point N of the storage container 1
However, the present invention is not limited to this, and FIG.
As shown in (b), the direction toward the center point N of the storage container 1
May be formed by inclining in different directions.
Yes. In FIG. 5A, the convex portion 6 (similarly to the concave portion 7) is formed on the sidewall 3
a and 3b in the same direction with respect to a line M connecting at a right angle and different
Angle θ₁, Θ₂(Θ ₁≠ θ₂) When tilted with
FIG. 5B shows the convex portion 6 (the concave portion 7 is also the same).
Different from the line M connecting the side walls 3a and 3b at a right angle
It shows the case of tilting in the opposite direction and at different angles.

In the above embodiment, the upper flange 4 of the container body 1A has convex portions 6 and 6 ', and the lower flange 5 has concave portions 7 and 7'.
However, the positioning recess 7 is provided on the upper flange 4 side.
7 ', the lower flange 5 side may be provided with convex portions 6, 6'fitting with the concave portions 7, 7'. Incidentally, the convex portions 6, 6 '
The sectional shape of the recesses 7 and 7'is not limited to the triangular shape,
It may have a quadrangular shape or any other shape, and, in short, may be any shape that can be vertically fitted and tilted.

[0018]

As described above, according to the first aspect of the invention, one of the upper convex portion or the concave portion for positioning is provided on each upper edge portion of the opposing side walls of the container body including the bottom wall and the four side walls. Each of the upper protrusions or recesses is formed to incline at a different angle with respect to the line connecting the opposing side walls at a right angle, and the upper protrusions are formed near the lower edges of the opposing side walls. Since one of the lower concave portion or the convex portion that fits with the concave portion or the concave portion is formed respectively, the storage containers stacked vertically can be formed by a simple configuration in which the convex portion and the concave portion for positioning have an inclination. Even when an external force is applied to the storage container in a direction parallel to the concave-convex fitting part during transportation or storage in a warehouse, or when lateral vibration is applied during transportation. It has a structure that the fitting of the uneven fitting part does not come off It is possible to prevent the cargo collapse due to lateral displacement of the saw the container. Moreover, since the positioning convex portion and the concave portion are respectively inclined, the fitting area of the concave portion and the convex portion is increased, and the fitting force of the storage container can be increased.
As a result, it is possible to provide a storage container for transportation that can sufficiently protect the contents without the risk of the contents falling or being damaged due to the collapse of the loads of the storage containers stacked in the upper and lower stages. Further, when the storage container is a molded product, the transport storage container of the present invention can be easily formed only by changing the design of a part of the molding die (the portion where the convex portion and the concave portion are formed). Thus, there is an effect that it is not necessary to significantly change the design of the molding die and an increase in cost can be suppressed.

According to the invention of claim 2, in addition to the effect of claim 1, the convex portion or concave portion on the upper side of claim 1 is formed to be inclined toward the center point of the upper opening of the container body.
At least one pair of projections and recesses for positioning are respectively formed on the radiation radially extending through the center of the container body, and when stacking the storage containers in multiple stages, Even when it is flipped 180 ° in the horizontal direction about the center point, it can be fitted on the lower storage container. That is, the upper storage container is horizontally
° In any of the two inverted states, it is possible to fit the lower storage container, so it is possible to reduce the time required for multi-stage stacking, etc. On the other hand, even if external force or vibration is applied from the lateral direction, it is possible to receive these external force and vibration evenly by the concave and convex fitting parts, and it is possible to more reliably prevent the collapse of the load due to the lateral displacement of the storage container for transportation. Play.

[Brief description of drawings]

1 shows a storage container for transportation used in an embodiment of the present invention, (a) is a sectional view taken along line EE of (b), and (b) is a partially cutaway plan view.

2A is a sectional view taken along line FF of FIG. 1B, FIG.
FIG. 2 is a sectional view taken along line WW of FIG.

FIG. 3A is a line AA or A′-A ′ in FIG.
1B is a sectional view taken along line BB in FIG. 1B,
2C is an enlarged cross-sectional view of the P ′ portion of FIG. 2A, and FIG.
1B is a sectional view taken along the line DD, and FIG. 1E is an enlarged sectional view of a Q portion in FIG.

FIG. 4 is a plan view illustrating a fitted state of the convex portion and the concave portion of the same.

5A and 5B are partially omitted plan views showing another embodiment of the present invention.

FIG. 6 is a perspective view of a conventional storage container.

FIG. 7A is a front view of a conventional storage container, and FIG. 7B is an explanatory view of a conventional multi-tiered storage container in an inclined state.

FIG. 8 is an explanatory diagram of a gap in a conventional concave-convex fitting portion.

9A and 9B show another conventional example, in which FIG. 9A is a front view, FIG. 9B is a perspective view in a stacked state, and FIG.

[Explanation of symbols]

 1A Container main body 2 Bottom wall 3a-3d Four side walls 6 Convex part 7 Recessed part N Center point

Claims (2)

[Claims] 1. One of an upper convex portion or a concave portion for positioning is formed at each upper edge portion of opposing side walls of a container body composed of a bottom wall and four side walls, and these upper convex portions or concave portions are formed. , Formed so as to be inclined at different angles with respect to a line connecting the opposing side walls at a right angle, and near the lower edge of the opposing side wall, a lower concave portion that fits with the upper convex portion or concave portion or A storage container for transportation, characterized in that one of the convex portions is formed. 2. The storage container for transportation according to claim 1, wherein the upper convex portion or the concave portion is formed to be inclined toward the center point of the upper opening of the container body.