JP2002240821A - Folding container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a box container from moving out of a corner mount block even if external force in the direction along a longer side bank of a bottom of a folding container works to the box container stacked on the folding container which has been folded, by forming corner mount blocks with an approximately L-shaped plane shape at four corners of the bottom, forming a shorter side region to be long, which extends along an outer wall on a shorter side where a longer side mount block is not formed, and forming a stage outside the shorter side. SOLUTION: The folding container has the corner mount blocks 1d whose plane shape is an approximate L-shape formed at four corners on the bottom, the shorter side region 1d2 extending along the outer wall 1c on the shorter side where the longer side mount block is not formed is formed to be long, and the stage 1d3 is formed outside the shorter side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a folding container which can be folded so that a side wall disposed so as to surround a bottom portion overlaps the bottom portion.

[0002]

2. Description of the Related Art Conventionally, a long side wall connected via a hinge member to an opposite long side portion of a bottom portion having a substantially rectangular planar shape, and a hinge member similarly connected to an opposite short side portion of the bottom portion. It is composed of short side walls connected through the base, and is set up in a box shape by erecting the long side wall and the short side substantially perpendicularly to the bottom, and when folded, so as to overlap on the bottom. There is known a folding container in which a long side wall and a short side wall are folded. When assembled in a box shape, a long side wall or a short side wall is locked by a locking mechanism so that the long side wall or the short side wall does not fall toward the bottom. The lock mechanism has an elastic plate-like body formed on the long side wall or the short side wall and having a protruding ridge at the tip, and is assembled in a box shape. , The plate is shaped The inner wall surface of one side wall which is not, by abutting the convex protrusions formed on the plate-like body, the side wall is configured so as not fall toward the bottom.

[0003]

A so-called non-foldable container, which is not foldable, is placed on a folded container.
The stacking of the box containers is performed, but at the time of the stacking operation, the fitting bank portion having a large radius at the corner formed on the bottom rear surface of the box container located at the top is located at the bottom. However, there is a problem that the container can be easily moved with respect to the bottom of the folded container in a folded state, and cannot be stably stacked.

An object of the present invention is to solve the problems of the above-mentioned conventional folding container.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention has a bottom portion and four side walls connected to each other via a hinge member, and is folded so that the side walls overlap the bottom portion. First, in the folding container capable of being formed, first, at the four corners of the bottom, a corner mounting block having a substantially L-shaped planar shape is formed,
From the box-shaped state, the corner mounting block portion extending along the side wall that is first collapsed is formed to be long, and the corner mounting block extending along the side wall that is first collapsed is formed. Secondly, a stepped portion is formed on the outer side of the placing block portion, and secondly, a concave portion whose lower side is opened is formed in a lower horizontal portion constituting a peripheral rib of a side wall which is folded down later. When the container is folded, a portion extending along the side wall of the corner mounting block that is first collapsed is inserted into the recess.

[0006]

Embodiments of the present invention will be described below, but the present invention is not limited to these embodiments unless it exceeds the gist of the present invention.

The overall structure of the present invention comprises a bottom 1 and opposed long side walls 2 hingedly connected to the bottom 1.
And the opposite short side wall 3 hinged to the first side wall 3 from the assembled state shown in FIG. 1. Then, it is laid down so as to overlap the bottom portion 1, and then the long side wall 2 is
By folding over the short side wall 3 overlapped on the bottom part 1, as shown in FIG. 3, the folding container can be compactly folded. Further, from the state shown in FIG.
Is set up substantially vertically, and then the short side wall 3 is set up almost vertically, so that the folded container that has been folded can be assembled in a box shape as shown in FIG.

Next, mainly referring to FIGS. 4 and 5,
The bottom 1 will be described.

The bottom 1 has a substantially rectangular planar shape, and the opposite long side of the bottom 1 has a generally U-shaped cross section perpendicular to the longitudinal direction. 1a is formed. On the outer upper surface of the long side bank 1a, an outer wall 1b (hereinafter, referred to as a long side outer wall) extending upward and flush with the outer surface of the long side bank 1a is formed.
On the inner upper surface of the long-side bank portion 1a, a plate-shaped portion h1 constituting the long-side hinge female portion H1 extends upward, and the top end of the plate-shaped portion h1 has a long side. Side outer wall 1b
A hook h2 curved in the direction is formed. On the long side bank portion 1a, an appropriate number of long side hinge female portions H1 are formed at predetermined intervals. In this embodiment, an example in which seven long-side hinge female portions H1 are formed is shown. The long side hinge female portion H1 is connected to the long side outer wall 1b.
It is formed at substantially the same height as.

An outer wall (hereinafter, referred to as a short side outer wall) 1c having a height lower than that of the long side outer wall 1b formed on the long side bank 1a is formed on the opposite short side of the bottom portion 1. The short side outer wall 1c is formed with a pair of fitting recesses 1c1 that are open at the outside and above at predetermined intervals. Further, along the short side outer wall 1c and close to the short side outer wall 1c, the bottom 1 includes a plate-shaped portion h1 and a hook h2 curved in the direction of the short side outer wall 1c. Short side hinge female part H2 similar to the long side hinge female part H1
Are formed. This embodiment shows an example in which three short side hinge female portions H2 are provided.
The short side hinge female portion H2 is formed at substantially the same height as the short side outer wall 1c.

[0011] The four corners of the bottom 1 have long side outer walls 1b.
A corner mounting block 1d having a substantially L-shaped planar shape is formed to extend upward beyond. Corner mounting block 1
d is approximately the same width as the long side bank 1a,
a long side portion 1d1 extending in the direction a, and a short side outer wall 1c
It has a shorter side portion 1d2 that is more inside and extends along the shorter side outer wall 1c, and a step portion 1d3 is formed outside the shorter side portion 1d2.

Reference numeral 1e denotes an appropriate number of long side mounting blocks formed at predetermined intervals at corners formed by the upper surface of the long side bank 1a and the inner wall surface of the outer wall 1b. The long side mounting block 1e has the same height as the corner mounting block 1d described above. In this embodiment, it is formed between the corner mounting block 1d and the long side hinge female portion H1 adjacent to the corner mounting block 1d, and between the adjacent long side hinge female portion H1. In total, six long side mounting blocks 1e are formed. 1f is
Plate-shaped reinforcing ribs are formed at appropriate places at corners formed by the upper surface of the long-side bank 1a and the inner wall of the long-side outer wall 1b, and the reinforcing rib 1f is formed of the long-side outer wall 1b. Is formed so as not to extend upward beyond. The corner mounting block 1d and the long side mounting block 1e have an opening on the outside and are formed in a cavity, which is advantageous in terms of reducing the weight of the bottom 1 and thus the folding container. Preferably, as in the case of the corner mounting block 1d, the ribs 1d4 can be formed vertically and horizontally as necessary. 1g is a reinforcing partition rib formed in the substantially inverted U-shaped long side bank portion 1a.

Reference numeral 1h denotes a substantially square fitting bank bulging downward from the back surface of the bottom 1 in a cylindrical shape. On the back surface of the bottom portion 1, an appropriate number of long-side direction band-shaped concave portions (in this embodiment, opposite long-side bank portions 1 a) along the corresponding long-side bank portions 1 a.
A single long side direction band-shaped concave portion is shown in the center portion of FIG. By forming a short-side band-shaped concave portion (in this embodiment, three short-side band-shaped concave portions are shown) 1i2 between 1i1 and the opposing short side outer wall 1c. The fitting bank portion 1h is formed, and in the present embodiment, eight fitting bank portions 1h are shown as an example. A short side edge 1j that forms the back surface of the bottom 1 is formed between the short side outer wall 1c and the fitting bank 1h formed close to the short side outer wall 1c. . A rib 1k extending vertically and horizontally is formed on the back surface of the bottom portion 1. Further, the fitting bank 1h is provided with a circumferential rib 1h1 and an intersection extending vertically and horizontally within the circumferential rib 1h1. Rib 1h
2 is formed.

Next, the long side wall 2 will be described with reference to FIGS. 6, 7 and 14. FIG.

The long side wall 2 has a horizontally long substantially rectangular plate-like portion 2.
a peripheral rib 2b extending perpendicularly to the surface of the plate-like portion 2a along the upper and lower edges and the left and right edges of the plate-like portion 2a. Have been. Peripheral rib 2
An appropriate number of reinforcing ribs 2c extending in the vertical direction and the horizontal direction are appropriately formed in the plate-like portion 2a surrounded by b. The side on which the peripheral ribs 2b and the reinforcing ribs 2c are formed is located outside the folding container when assembled in a box shape, forms the outer wall surface of the long side wall 3, and includes such peripheral ribs 2b and reinforcing ribs. The flat side on which the 2c is not formed is located inside the folding container when assembled in a box shape, and forms the inner wall surface of the long side wall 2.

At both vertical ends of the long side wall 2, a vertically long engagement frame 2d is formed which extends substantially perpendicular to the plate-like portion 2a and extends in the direction of the inner wall surface of the long side wall 2. In the engagement frame 2d, three fitting holes 2e1, 2e2, 2e3 substantially parallel to the plate-like portion 2a are formed at predetermined intervals in the vertical direction.
Of the fitting holes 2e1, 2e2, 2e3, around the fitting hole 2e2 located at the center, cooperating with the plate-like portion 2a, surrounding the fitting hole 2e2, and in the plate-like portion 2a. The reinforcing bank 2e4 having a substantially U-shape connected thereto is formed. By forming such a reinforcing bank 2e4, the twist strength and rigidity of the engagement frame 2d can be increased.

A U-shaped slit 2f is formed near each of the upper end corners of the plate-like portion 2a of the long side wall 2, and by forming the U-shaped slit 2f,
The portion surrounded by the slit 2f is formed in a cantilevered elastic piece 2g. A locking projection 2g1 is projected from the tip of the locking elastic piece 2g on the inner wall surface side.
The vertical surface of the g1 on the side of the engagement frame 2d is preferably
d is formed on a vertical surface 2g2 substantially parallel to a surface 2d1 on the inner wall surface side, and the locking projection 2g1 has a vertical surface 2g2.
An inclined surface 2g3 is formed from 2 toward the inner wall surface. In addition, the locking projection 2g1 of the locking elastic piece 2g is formed such that the tip protrudes from the inner wall surface by a predetermined amount, and in this embodiment, the locking elastic piece 2g is It is configured to be located between the upper fitting hole 2e1 formed in the frame 2d and the center fitting hole 2e2.

Reference numeral 2h denotes a horizontally elongated lower block formed at a predetermined interval on the back surface of the lower horizontal portion 2b1 constituting the peripheral rib 2b of the long side wall 2. The lower block 2h
A recess 2i is formed in the space between the bottom 1 and the long side mounting block 1e. In this embodiment, seven lower blocks 2h are shown, and six recesses 2i are formed corresponding to the six long-side mounting blocks 1e. At the lower surface of the horizontal frame 2h1 of each lower block 2h, a pair of support pieces h3 whose lower ends are semicircular are vertically provided at predetermined intervals, and a horizontal pin h4 is provided between the support pieces h3. The long side hinge male part H corresponding to the long side hinge female part H1 of the bottom part 1 described above is formed by a pair of support pieces h3 and a horizontal pin h4.
3 are formed. A reinforcing piece 2j similar to the supporting piece h3 is vertically provided at a portion of the lower block 2h where the long side wall side hinge male portion H3 of the lower surface of the horizontal frame 2h1 is not formed. The supporting piece 2j and the supporting piece h3 or the adjacent reinforcing piece 2j and the supporting piece h3 are connected by a connecting plate 2k.

Reference numeral 2m denotes a concave portion which is formed in the vicinity of both ends of the lower horizontal portion 2b1 constituting the peripheral rib 2b of the long side wall 2 and whose lower portion is opened. When the folding container is assembled in a box shape, The short side portion 1d2 of the corner mounting block 1d formed on the bottom 1 is inserted. Further, a corner notch 2n is formed by a lower horizontal portion 2b1 constituting a peripheral rib 2b of the long side wall 2 and a lower block 2h located on both sides, and the corner notch 2n is folded. When the container is assembled in a box shape, the long side portion 1d1 of the corner mounting block 1d formed on the bottom portion 1 described above is inserted.

Next, referring to FIGS. 8 to 12 and FIG.
The short side wall 3 will be described.

The short side wall 3 has a horizontally long, substantially rectangular plate-like portion 3.
a peripheral rib 3b extending perpendicularly to the surface of the plate portion 3a along the upper and lower edges and the left and right edges of the plate portion 3a. Have been. Peripheral rib 3
b, the plate-like portion 3 is provided outside the substantially vertical side portion 3b1.
An overhang frame 3c having a vertically long plate portion 3c1 formed by extending a is formed. A corner notch 3d is formed below the overhang frame 3c by the lower surface of the overhang frame 3c and the substantially vertical side 3b1 forming the peripheral rib 3b, and this corner notch 3d is formed. Is configured such that when the folding container is assembled in a box shape, the short side portion 1d2 of the corner mounting block 1d formed on the bottom portion 1 described above is inserted.

At a vertical edge of the plate portion 3c1 forming the overhanging frame 3c, an end vertical rib 3c2 extending perpendicularly to the plate portion 3c1 and extending outward is formed. Fitting projections 3e1, 3e2, 3e3 which extend beyond the tip of the end vertical rib 3c2 and have the same height at the tip are formed on the vertical rib 3c2. 3e1, 3e2, 3e3 are fitting holes 2e1, 2e2, 2e3 formed in the engaging frame 2d of the long side wall 2 described above.
It is configured to be inserted into. Recesses 3f are formed in the upper and lower portions of the fitting protrusion 3e2 located at the center, and the fitting protrusion 3e2 located at the center is smaller than the fitting protrusions 3e1 and 3e3 located at the upper and lower sides. When the folding container is assembled in a box shape, the engagement frame 2 of the long side wall 2 is formed in the concave portion 3f.
The reinforcing bank portion 2e4 formed around the fitting hole 2e2 located at the center of d is inserted.

An unlocking member, which will be described later, is provided on the outside near the upper corners of the plate portion 3a of the short side wall 3, that is, when the folding container is assembled in a box shape. A possible unlocking member storage area 3g is formed. The lock release member storage area 3g is
vertical rib 3g parallel to the substantially vertical side 3b1 forming b
1 and upper horizontal ribs 3g2 'extending horizontally from the vertical ribs 3g1 at predetermined intervals in the side portion 3b1 direction.
An upper vertical rib 3g2 'extending vertically upward from the tip of the upper horizontal rib 3g2' and connected to an upper horizontal portion 3b2 forming a peripheral rib 3b;
A lower vertical rib 3g3 "extending vertically downward from the tip of the lower horizontal rib 3g2"; a horizontal rib 3g4 extending from the lower end of the lower vertical rib 3g3 "in the direction of the side portion 3b1 and connected to the side portion 3b1. , An upper vertical branch rib 3g5 'extending downward from the upper horizontal portion 3b2 located on the side portion 3b1 side.
A lower vertical branch rib 3g5 "extending in the direction of the upper horizontal portion 3b2 from the middle of the horizontal rib 3g4; and an upper inclined rib inclined downward from the tip of the upper vertical branch rib 3g5 'toward the side portion 3b1. 3g6 'and lower vertical branch rib 3
g5 ", and lower inclined ribs 3g6" which are inclined upward from the leading end toward the side 3b1. Further, a slit 3h is formed on the side of the plate portion 3a of the side portion 3b1 located between the upper inclined rib 3g6 'and the lower inclined rib 3g6 ". Further, a lower surface of the upper horizontal rib 3g2' is formed. , Approaching the plate-shaped portion 3a, and engaging the upper locking projection 3i1.
Similarly, on the upper surface of the lower horizontal rib 3g2 ″, a lower locking projection 3i2 is provided so as to correspond to the upper locking projection 3i1.

Reference numeral 4 denotes an unlocking member. The unlocking member 4 has a substantially square base 4a on which upper and lower rails 4a1 are formed, and a central portion of the base 4a. Hook recess 4a into which a worker can insert a finger
2 are formed. One of the opposite vertical bank portions 4a3 of the base portion 4a is formed in a triangular shape, and is formed by extending the back plate 4a4 of the base portion 4a from the tip of the triangular bank portion 4a3. A horizontally long substantially rectangular plate-shaped pressing portion 4b extends. A support rib 4c connected to the pressing portion 4b extends from the tip of the triangular bank portion 4a3. Further, the tip of the support rib 4c extends vertically and in a triangular shape. Bank part 4a3
An arrow-shaped elastic wing portion 4d formed of a pair of elastic strips 4d1 inclined in the direction is formed. 4e is a bank 4a3
The vertical ridge 4e is formed in the vertical ridge 4e.
Is formed, the unlocking member 4 can be easily visually confirmed, and the tactile sensation of the hand can be obtained without visual inspection.
The operation of the unlocking member 4 becomes possible, and thus the operability of the unlocking member 4 is improved. Note that, without forming the back plate 4a4 on the base 4a, the hooking recess 4a2 can be configured as a window formed on the base 4a.

In the lock release member 4 described above, the rail 4a1 of the lock release member 4 is inserted into the gap between the plate-like portion 3a of the short side wall 3, the upper locking projection 3i1 and the lower locking projection 3i2, and the lock is released. The pressing portion 4b of the releasing member 4 is formed on the plate-like portion 3a side of the side portion 3b1 located between the upper inclined rib 3g6 ′ and the lower inclined rib 3g6 ″ forming the unlocking member storage area 3g of the short side wall 3. Inserted into the slit 3h, and a pair of elastic strips 4 of the unlocking member 4.
d1 is replaced by an upper concave portion 3m1 and a lower vertical rib 3g3 ″ formed by an upper horizontal rib 3g2 ′ and an upper vertical branch rib 3g5 ′ forming an upper vertical rib 3g3 ′, a peripheral rib 3b.
And the lower ribs 3g5 ″ formed by the horizontal ribs 3g4 and the lower vertical branch ribs 3g5 ″.
When no external force acts on the unlocking member 4, it is formed in the unlocking member storage area 3 g of the short side wall 3 by the elastic force of the pair of elastic strips 3 d 1 inserted in the upper concave portion 3 m 1 and the lower concave portion 3 m 2. The pressing portion 4b of the unlocking member 4 inserted into the slit 3h
Is configured not to extend outside beyond the end vertical rib 3c2 of the overhang frame 3c.

The lower horizontal portion 3b3 forming the peripheral rib 3b
A pair of support pieces h3 similar to the support piece h3 constituting the long side wall side hinge male portion H3 described above is vertically provided on a lower surface of the support piece h3, and a similar horizontal pin h4 is provided between the support pieces h3. The short side hinge male portion H4 corresponding to the short side hinge female portion H2 of the bottom portion 1 is formed by the pair of support pieces h3 and the horizontal pin h4. In addition, adjacent to the support piece h3 forming the short side wall side hinge male part H4,
Reinforcing piece 3 similar to the reinforcing piece formed on long side wall 2 described above
j is suspended, and the adjacent reinforcing piece 3j and supporting piece h3 are connected to the connecting plate 2 formed on the long side wall 2 described above.
are connected by a connection plate 3k similar to k. In the plate-like portion 3a of the short side wall 3, reinforcing vertical ribs 3n and horizontal ribs 3p are appropriately formed as necessary. 3q
Is a handle rib disposed diagonally forward from the lower surface of the horizontal rib 3p located immediately below the upper horizontal portion 3b2 forming the peripheral rib 3b. The gap 3r into which the operator's finger or an appropriate hook can be inserted is formed by the use rib 3q. This gap 3
r to carry the box-shaped folded container or to insert the
By inserting an appropriate hook into r, the folding container assembled in a box shape can be moved and transported while dragging. In addition, 3s is a pair of gaps located between the reinforcing pieces 3j suspended from the lower surface of the lower horizontal portion 3b3, and a pair of fittings formed on the short side outer wall 1c of the bottom 1 in the gap 3s. The bulging portion 1c1 'constituting the mating concave portion 1c1 is configured to be inserted.

The bottom 1, the long side wall 2, and the
It is preferable that the short side wall 3 and the lock release member 4 are integrally formed of a synthetic resin by injection molding or the like.

Next, the bottom part 1, the long side wall 2 and the short side wall 3 are
An operation of assembling the container into a folding container will be described.

In order to hinge-connect the long side wall 2 to the bottom 1, the hook h2 of the long side hinge female part H1 formed along the long side bank 1a formed on the bottom 1 and the long side outer wall 1b are connected. In the gap, the horizontal pin h of the long side wall side hinge male portion H3 of the long side wall 2
4 and the horizontal pin h4 is hooked on the hook h2 of the long side hinge female portion H1 of the bottom portion 1 so that the bottom portion 1 and the long side wall 2 are hinged. At this time, as described above, the concave portion 2i formed between the lower blocks 2h provided on the back surface of the lower horizontal portion 2b1 constituting the peripheral rib 2b of the long side wall 2 has the length formed on the bottom portion 1. The side mounting block 1e is configured to be inserted.

To connect the short side wall 3 to the bottom 1, the hook h 2 of the short side hinge female portion H 2 formed along the short side outer wall 1 c of the bottom 1 and the short side outer wall 1 c are connected. The horizontal pin h4 of the short side wall side hinge male portion H4 of the short side wall 3 is provided in the gap.
And the horizontal pin h4 is hooked on the hook h2 of the short-side hinge female portion H2 of the bottom portion 1 so that the bottom portion 1 and the short side wall 3 are hinged.

As described above, the bottom portion 1 and the long side wall 2 are hinged, and the bottom portion 1 and the short side wall 3 are hinged, so that the folding container is assembled.

When assembling the box-shaped folding container as shown in FIG. 1 from the state of being folded as shown in FIG. 3, first, as shown in FIG. Then, the long side wall 2 is set up substantially vertically. Next, the short side wall 3 folded so as to overlap the bottom 1 is
When it is rotated in the vertical direction from the substantially horizontal state, the overhang frame 3c of the short side wall 3 approaches so as to face the engagement frame 2d formed on the long side wall 2, and the short side wall 3 is further moved in the vertical direction. , The end vertical rib 3c2 of the overhang frame 3c of the short side wall 3
Is a locking elastic piece 2g protruding from the inner wall surface of the long side wall 2.
Is pressed to rotate the locking elastic piece 2g in the outer surface direction against the elasticity of the locking elastic piece 2g.
Further, when the short side wall 3 is rotated in the vertical direction, the short side wall 3
Fitting projections 3 e 1, 3 e 2, 3 protruding from projections 3 c of
e3 is a fitting hole 2e formed in the engagement frame 2d of the long side wall 2.
1, 2e2 and 2e3. Fitting protrusions 3e1, 3e2, 3e3 protruding from the overhang frame 3c of the short side wall 3.
Are fitted holes 2e1 formed in the engagement frame 2d of the long side wall 2,
In the process of being inserted into 2e2 and 2e3, the locking projection 2g1 of the locking elastic piece 2g formed on the long side wall 2 is disengaged from the end vertical rib 3c2 of the protruding portion 3c of the short side wall 3 to lock. The elastic piece 2g returns to its original position as shown in FIG. 14 due to its elasticity, and the vertical surface 2g of the locking elastic piece 2g.
2 comes into contact with the plate portion 3c1 of the overhang portion 3c of the short side wall 3, and therefore, even if the short side wall 3 tries to rotate in the direction of the bottom portion 1,
The protruding portion 3c of the short side wall 3 comes into contact with the locking projection 2g1 of the locking elastic piece 2g formed on the long side wall 2, so that the rotation in the direction of the bottom 1 is prevented, and the short side wall 3 is prevented. Even if a load is applied from the outside to the bottom, it does not fall down in the direction of the bottom 1. Similarly, the other short side wall 3 is rotated vertically from a substantially horizontal state, and the folding container is assembled in a box shape.

When folding the box-shaped folding container, a finger is hooked on a hooking recess 4a2 formed on a base 4a of the unlocking member 4 provided on the short side wall 3, and the unlocking member 4 is held. When it is moved in the direction of the long side wall 2 against the elastic force of the pair of elastic strips 3d1 inserted into the upper concave portion 3m1 and the lower concave portion 3m2,
The tip of the pressing portion 4b of the unlocking member storage area 3g at a position facing the locking projection 2g1 of the locking elastic piece 2g formed near the upper end corner of the upper plate-like portion 2a has a short side wall. 3 and projecting outward beyond the end vertical ribs 3c2 of the overhanging frame 3c. As shown in FIG. 15, the engaging protrusion 2g1 of the engaging elastic piece 2g formed on the long side wall 2 is engaged. Stop projection 2
The direction in which g1 is disengaged from the overhang frame 3c of the short side wall 3, that is,
By pushing outward, the locking elastic piece 2g of the long side wall 2 is bent against its elasticity. When the locking projection 2g1 of the locking elastic piece 2g of the long side wall 2 formed on the long side wall 2 is disengaged from the overhang frame 3c of the short side wall 3, as shown in FIG. 3 is rotated in the direction of the bottom 1 so that a pair of opposing short side walls 3 are overlapped on the bottom 1. Then, the pair of opposing long side walls 2 are superimposed on the pair of opposing short side walls 3 which are superimposed on the bottom 1, so that the folding container assembled in a box shape can be folded.

As described above, when folding the box-shaped folded container, hands are put inside the folded container without bending the locking elastic pieces 2g of the long side walls 2 outward. By actuating the unlocking member 4 disposed on the short side wall 3 from the outside of the folding container, the locking elastic piece 2g of the long side wall 2 and the short side wall 3
Can be released from the lock state with the overhang frame 3c, so that the workability of the lock release operation of the lock mechanism is improved.

A reinforcing bank 2e4 is formed around the fitting hole 2e2 located at the center of the fitting holes 2e1, 2e2, 2e3 formed in the engaging frame 2d of the long side wall 2. Since the twisting strength and rigidity of the mating frame 2d are enhanced, it is possible to prevent the engaging frame 2d and its vicinity from being deformed or damaged by the external force applied to the engaging frame 2d as in the related art. Besides, it is possible to prevent the locked state of the locking elastic piece 2g of the long side wall 2 and the overhanging frame 3c of the short side wall 3 from being released due to deformation or damage of the engaging frame 2d or its vicinity.

As shown in FIG. 2, the long side wall 2 is moved from the state in which the short side wall 3 overlaps the bottom 1 to the bottom 1.
When it is rotated on the short side wall 3 laid on the bottom 1, the reinforcement formed around the centrally located fitting hole 2 e 2 formed in the engagement frame 2 d of the long side wall 2. Bank part 2
e4 is configured to be inserted into a fitting concave portion 1c1 formed on the short side outer wall 1c of the bottom portion 1, and the reinforcing bank portion 2e4 formed on the engaging frame 2d of the long side wall 2 is used as a folding container. It is configured so as not to interfere with the compact folding of the.

As shown in FIG. 17, a so-called box container B, which cannot be folded, is stacked on a folded container H in a folded state. The bottom surface of the bottom portion b1 of the box container B is placed on the long side placement blocks 1e and the corner portion placement blocks 1d formed on the bottom portion 1 of the folding container H in an appropriate number, and the bottom portion b1 of the box container B is placed. A fitting bank b2 similar to the fitting bank 1h formed on the back surface of the bottom portion 1 of the folding container formed on the back surface of the above-described folding container.
Are located inside the long side mounting block 1 e and the corner mounting block 1 d formed on the bottom 1 of the folding container H. With this configuration, even if the box container B attempts to move in the direction along the short side outer wall 1c of the bottom portion 1 of the folding container H, the fitting bank b2 of the box container B is moved to the long side. The mounting block 1e and the long side portion 1d of the corner mounting block 1d.
1, the movement of the box container B is prevented, and the box container B is moved along the long side bank 1 of the bottom 1 of the folding container H.
If the user tries to move in the direction along
Is fitted to the short side portion 1d2 of the corner mounting block 1d, and its movement is prevented. Therefore, the box containers B are stacked on the folding container H in a stable state. can do.

The number and intervals of the long side mounting blocks 1e formed on the bottom 1 differ depending on the size of the folding container or box container stacked on the folded folding container. As shown in the embodiment, when six long side mounting blocks 1e are formed between the corner mounting blocks 1d, the long side bank of the bottom 1 of the folding container is provided. Four small folding containers and box containers can be stacked in a stable state without moving horizontally in the 1a direction.

Incidentally, the corner radius b3 of the fitting bank b2 formed on the back surface of the bottom portion 1 of the box container B is the corner radius of the fitting bank portion 1h formed on the back surface of the bottom portion 1 of the folding container H. In addition, no mounting block such as the long-side mounting block 1e is formed on the short-side outer wall 1c of the bottom portion 1 of the folding container H, and Since only the short side portion 1d2 of the corner mounting block 1d prevents movement, an external force acts on the box container B in the direction along the long side bank portion 1a of the bottom portion 1 of the folding container H. In this case, there is a possibility that the fitting bank b2 of the box container B comes off the short side portion 1d2 of the corner mounting block 1d and moves. In order to eliminate this possibility, in the present embodiment, the length of the short side portion 1d2 of the corner mounting block 1d is configured to be long. As described above, when the length of the short side portion 1d2 of the corner mounting block 1d is simply increased, the lower horizontal portion 2b1 constituting the peripheral rib 2b of the long side wall 2 and the lower block located on both sides are formed. 2h
Therefore, the height of the corner notch 2n formed by the above must be increased. If the height of the corner notch 2n is not increased, the lower horizontal portion 2b which forms the peripheral rib 2b of the long side wall 2 when the long side wall 2 in the substantially vertical state is tilted in the direction of the bottom 1
1 is the shorter side portion 1 of the longer corner mounting block 1d
As a result, the long side wall 2 cannot rotate in the direction of the bottom 1. However, when the height of the corner cutout 2n formed on the long side wall 2 is increased, the height near both sides of the long side wall 2 is reduced, and the strength of the long side wall 2 is reduced.

In order to solve the above-mentioned problem, as described above, in the present embodiment, the stepped portion 1d is provided outside the short side portion 1d2 of the corner mounting block 1d disposed on the bottom portion 1.
By forming d3, the thickness w of the short side portion 1d2 is obtained.
1 is thinned, and a lower horizontal portion 2b1 forming a peripheral rib 2b of the long side wall 2 has a concave portion
Is formed so that the short side portion 1d2 of the corner mounting block 1d is inserted into the recess 2m during the assembling work of the folding container. Therefore,
As compared with the case where the height of the corner notch 2n formed in the long side wall 2 is increased as a whole, the recess 2m into which the short side portion 1d2 of the corner mounting block 1d can be inserted is provided. Since it is merely formed, the strength of the long side wall 2 is not greatly reduced, and when the folding container is folded, the corner mounting block 1 of the bottom 1 is
d is formed in the concave portion 2 formed in the long side wall 2.
m, the longitudinal direction of the long side wall 2, ie,
The rattling in the horizontal direction is suppressed.

When the folding container is assembled in a box shape, the upper surface of the corner mounting block 1d of the bottom 1
Since it is configured to approach or contact the lower horizontal portion 2b1 of the peripheral rib 2b forming the corner cutout 2n formed on the long side wall 2, a load is applied to the long side wall 2 from above. Also, since the lower horizontal portion 2b1 of the long side wall 2 is supported by the upper surface of the step portion 1d3 formed on the bottom portion 1, it is possible to prevent the long side wall 2 from being buckled and damaged.

[0042]

Since the present invention has the above-described structure, the following effects can be obtained.

At the four corners at the bottom, a corner mounting block having a substantially L-shaped planar shape is formed, and extends from a box-shaped state along a side wall that is first collapsed. Since the corner mounting block portion is formed to be long, and a step portion is formed outside the corner mounting block portion extending along the first collapsed side wall, the corner mounting block portion is in a folded state. Even if an external force is applied to the box containers stacked on the folding container in the direction along the side wall that is folded down from behind the bottom of the folding container, the box container moves off the corner mounting block. Can be prevented.

In the lower horizontal portion that constitutes the peripheral rib of the side wall that is later folded down, a concave portion whose lower portion is opened is formed, and when the folding container is folded, the concave portion is provided with the corner mounting block. Since the portion extending along the side wall that is first collapsed is configured to be inserted, the strength of the side wall that is later collapsed does not significantly decrease,
Further, since the corner mounting block portion extending along the side wall that is first collapsed is inserted into the recess formed in the side wall that is later collapsed, the longitudinal direction of the side wall that is later collapsed, that is, The rattling in the horizontal direction is suppressed.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state in which a folding container according to the present invention is assembled in a box shape.

FIG. 2 is a perspective view of the folding container according to the present invention in the middle of assembly.

FIG. 3 is a perspective view of the folding container according to the present invention in a folded state.

FIG. 4 is a perspective view of the bottom of the folding container of the present invention.

FIG. 5 is a rear perspective view of the bottom of the folding container of the present invention.

FIG. 6 is a perspective view of the long side wall of the folding container according to the present invention as seen from the outer wall surface side.

FIG. 7 is a perspective view of the long side wall of the folding container according to the present invention as viewed from the inner wall surface side.

FIG. 8 is a perspective view of the short side wall of the folding container according to the present invention as viewed from the outer wall surface side.

FIG. 9 is a perspective view seen from the inner wall surface side of the short side wall of the folding container according to the present invention.

FIG. 10 is a partially exploded perspective view of the short side wall of the folding container according to the present invention as viewed from the outer wall surface side.

FIG. 11 is a partial front view of the short side wall of the folding container according to the present invention as seen from the outer wall surface side.

FIG. 12 is a partial perspective view of the short side wall of the folding container according to the present invention as viewed from the outer wall side.

FIG. 13 is a partial perspective view of the folding container according to the present invention, in which the short side wall of the folding container is rotating in the vertical direction.

FIG. 14 is a partial horizontal sectional view showing the vicinity of a corner in a state where the folding container of the present invention is assembled in a box shape.

FIG. 15 is a view for explaining a process in which the short side wall of the folding container according to the present invention is rotated toward the bottom.
It is a partial horizontal sectional view similar to.

FIG. 16 is a view illustrating a process in which the short side wall of the folding container according to the present invention is rotated in the bottom direction.
FIG. 6 is a partial horizontal sectional view of a state following FIG.

FIG. 17 is a perspective view of a folding container and a box container showing a state in which box containers are stacked on the folded folding container of the present invention.

[Explanation of symbols]

 1. Bottom 1d Corner mounting block 2. Long side wall 2d ........................... Engagement frame 3 ... Short side wall 3c ... Overhanging frame 4 ... .... Lock release members

Claims (2)

[Claims] 1. A folding container having a bottom portion and four side walls connected to the bottom portion via hinge members, and capable of being folded so that the side wall portions overlap the bottom portion, wherein four corner portions of the bottom portion include: While forming a corner mounting block having a substantially L-shaped planar shape, the corner mounting block portion extending along the side wall that is first collapsed from a box-shaped state is formed to be long, A folding container, wherein a step is formed outside the corner mounting block portion extending along the side wall that is first collapsed. 2. A lower horizontal portion which forms a peripheral rib of a side wall which is folded down later, is formed with a concave portion which is opened downward, and when the folding container is folded, a corner portion is placed in the concave portion. The folding container according to claim 1, wherein a portion extending along a side wall of the block that first falls is configured to be inserted.