WO2019074101A1

WO2019074101A1 - Container, folding container

Info

Publication number: WO2019074101A1
Application number: PCT/JP2018/038106
Authority: WO
Inventors: 吉田　攻一郎; 松原　礼宗; 照久花房
Original assignee: キョーラク株式会社
Priority date: 2017-10-13
Filing date: 2018-10-12
Publication date: 2019-04-18
Also published as: CN111108046A; CN111108046B

Abstract

Provided is a container with which it is possible to increase the movable range of an upper wall in relation to a side wall. The present invention provides a container provided with a side wall, an upper hinge member, and an upper wall. The upper hinge member and the side wall are linked so as to enable rotation about a first rotation axis. The upper hinge member and the upper wall are linked so as to enable rotation about a second rotation axis. The first and second rotation axes are parallel.

Description

Container, folding container

The present invention relates to a container such as a collapsible container (preferably a foldable container).

(First and third viewpoints)
Patent Document 1 discloses an assembly-type container configured of a resin panel.

(Second point of view)
Patent Document 2 discloses an assembly-type container configured of a resin panel. In Patent Document 2, the side wall is foldable so as to be in contact with the top surface of the bottom member by inserting a stop shaft provided on the side wall into a hole provided on the bottom member.

(Fourth viewpoint)
2. Description of the Related Art Conventionally, a foldable container that is used for transporting goods etc. is known. For example, Patent Document 3 discloses a folding container (container) composed of a resin panel.

JP 2001-180670 A JP, 2011-185442, A JP, 2006-205684, A JP, 2011-37500, A

(First point of view)
In Patent Document 1, the lid is configured to be openable and closable by a hinge structure provided on the upper side of the side wall. In such a configuration, the lid can not be rotated until the lid is parallel to the side wall.

The first aspect of the present invention is made in view of such circumstances, and provides a container in which the movable range of the upper wall with respect to the side wall can be expanded.

(Second point of view)
However, it is troublesome to fit the retaining shaft provided on the side wall into the hole provided on the bottom member.

The second aspect of the present invention is made in view of such circumstances, and provides a container capable of easily connecting the side wall to the bottom member in a rotatable manner.

(Third point of view)
In Patent Document 1, the upper wall of the container is constituted by a pair of lids. In such a configuration, a gap is easily formed between the pair of lids, and the inside of the container is not easily sealed.

The 3rd viewpoint of the present invention is made in view of such a situation, and provides a container in which a crevice is hard to be formed between a pair of upper walls.

(Fourth viewpoint)
However, in the resin panel of Patent Document 3, the front wall constituting the outer surface of the container and the back wall constituting the inner surface of the container are both formed of a foam blow molded resin, and for example, a structure such as a handle is used as a container In order to attach to the outer surface of, there existed a possibility that intensity might become inadequate.

Moreover, in the above-mentioned folding container, air leaks in the contact surface between members, and there existed a problem that sealing property and heat retention property are easy to be impaired.

The 4th viewpoint of the present invention is made in view of such a situation, and provides a folding container which improved heat retention.

(First point of view)
According to a first aspect of the present invention, there is provided a container comprising a side wall, an upper hinge member, and an upper wall, wherein the upper hinge member and the side wall are rotatably coupled around a first rotation axis, A container is provided, wherein the upper hinge member and the upper wall are rotatably connected about a second rotation axis, and the first and second rotation axes are parallel.

In the present invention, since the upper wall and the side wall are connected via the upper hinge member having the first and second rotation axes, the movable range of the upper wall with respect to the side wall can be expanded.

Preferably, the container as described above, wherein the second rotation axis is always arranged above the first rotation axis.
Preferably, in the container described above, the upper hinge member includes a rotation restricting portion that restricts the rotation of the upper hinge member, and the rotation restricting portion abuts on the side wall so that the second rotation shaft is It is a container comprised so that it may not become lower than a 1st rotating shaft.
Preferably, the container described above, wherein the plane passing through the first and second rotation axes is an angle of 91 to 135 degrees with respect to the outer surface of the side wall.
Preferably, in the container described above, the first rotation shaft is disposed in a recess provided on the outer surface side of the side wall, and the recess is configured not to penetrate the side wall. .
Preferably, when the side wall is a first side wall, and the upper wall is a first upper wall, the container includes the second to fourth side walls, a second upper wall, and a bottom member, The first and second side walls face each other, the third and fourth side walls face each other, and are provided between the first and second side walls, and the first to fourth side walls face the bottom member. The second upper wall is a container configured to be rotatable relative to the second side wall.

(Second point of view)
According to a second aspect of the present invention, there is provided a container comprising a side wall, a lower hinge member, and a bottom member, wherein the lower hinge member and the side wall are rotatably connected, and the lower hinge member is The lower hinge member includes a hinge inclined surface inclined so that the width of the lower hinge member narrows toward the lower end, and the lower hinge member has a projection biased in a direction to project from the hinge inclined surface, and the bottom member Has a recess having a recess inclined surface inclined so that the width narrows downward, the recess inclined surface is provided with an inclined surface engagement hole, and the projection is retracted when pressed against the recess inclined surface A container is provided which is configured to: and the projection is engageable with the ramp engagement hole.

In the present invention, since the lower hinge member can be connected to the bottom member by pressing the projection of the lower hinge member against the concave slope, assembly is easy.

Preferably, in the container described above, the lower surface of the recess is provided with a lower surface engaging hole, the lower hinge member is provided with a lower protrusion projecting toward the lower surface engaging hole, and the lower side The protrusion is a container configured to be engageable with the lower surface engagement hole.
Preferably, in the container described above, the recess sloped surface includes first and second recess slopes, and the first and second recess slopes are provided to sandwich the lower hinge member. The protrusion is a container comprising first and second protrusions, wherein the first and second protrusions are configured to protrude towards the first and second recess slopes, respectively.
Preferably, in the container described above, the tip of the protrusion is configured to be parallel to the inclined surface of the recess.
Preferably, in the container described above, the hinge inclined surface is parallel to the recess inclined surface.
Preferably, when the side wall is a first side wall, the container includes second to fourth side walls, the first and second side walls face each other, and the third and fourth side walls face each other. Opposite and provided between the first and second side walls, the first to fourth side walls are containers configured to be rotatable with respect to the bottom member.

(Third point of view)
According to a third aspect of the present invention, there is provided a container comprising first and second side walls and first and second upper walls, wherein the first and second side walls face each other, and the first and second side walls The upper wall is configured to be rotatable relative to the first and second side walls, respectively, and when the first upper wall is pressed from above, the force in the direction in which the first upper wall approaches the second upper wall is the first upper A container is provided, configured to join a wall.

In the container of the present invention, when the first upper wall is pressed from above, the first upper wall is biased in the direction approaching the second upper wall, so a gap between the pair of upper walls Are difficult to form, and it is easy to improve the sealability inside the container.

Preferably, the container according to the above, wherein the first upper wall has a first inclined surface which becomes lower toward the tip of the first upper wall.
Preferably, the first and second upper walls have overlapping portions overlapping each other, the first inclined surface is provided at the overlapping portion, and the second upper wall is at the tip of the second upper wall at the overlapping portion. It is a container which has a 2nd inclined surface which becomes high, and the 1st and 2nd inclined surfaces oppose so that a 1st inclined surface may be located above a 2nd inclined surface.
Preferably, in the container described above, the inclination angle of the first inclined surface is 1 to 45 degrees with respect to the upper surface of the first upper wall.
Preferably, the container described above comprises the third and fourth side walls and the bottom member, and the third and fourth side walls are provided opposite to each other and between the first and second side walls, The first to fourth side walls are containers configured to be rotatable with respect to the bottom member.

(Fourth viewpoint)
According to a fourth aspect of the present invention, there is provided a collapsible container comprising a bottom wall and a side wall, wherein the side wall is vertically connected to the bottom wall, wherein the bottom wall and the side wall each have a container inner surface. An inner surface wall forming an outer surface wall forming an outer surface of the container, and an abutment wall forming an abutment surface abutting the bottom wall or the side wall, wherein the thermal conductivity of at least a part of the abutment wall is A folding container is provided, which is configured to be lower than the thermal conductivity of the outer wall.

According to the present invention, since the thermal conductivity of at least a part of the abutment wall constituting the abutment surface is higher than the thermal conductivity of the outer surface wall, it is possible to improve the heat retention on the abutment surface. It has become.

Hereinafter, various embodiments of the present invention will be illustrated. The embodiments shown below can be combined with one another.
Preferably, the expansion ratio of at least a part of the abutment wall is higher than the expansion ratio of the outer wall.
Preferably, the contact wall is configured such that the expansion ratio of the portion corresponding to the region of 60% or more of the contact surface is higher than the expansion ratio of the outer surface wall.
Preferably, in each of the bottom wall and the side wall, the at least one portion of the abutment wall and the inner wall are integrally formed.
Preferably, the at least one portion of the abutment wall and the inner wall are formed by a foam molding.
Preferably, the outer wall is formed by a non-foamed molding.
Preferably, the abutment surfaces of the abutment walls are each provided with a step and are adapted to mate with the abutment surfaces of the other abutment walls being abutted.
Preferably, the side wall is configured to turn around the rotation axis inside the container with respect to the main surface at the center of the inner surface wall and the outer surface wall to stand upright over the bottom wall.
Preferably, at least one of the bottom wall and the side wall includes a heat insulating material between the inner surface wall and the outer surface wall, and the abutment wall is formed of the heat insulating material.

It is a perspective view of container 1 of one embodiment of the 1st-a 3rd viewpoint of the present invention. FIG. 2 is a cross-sectional view passing through the upper hinge member 8 and the lower hinge member 7 in FIG. 1 (the upper hinge member 8 and the lower hinge member 7 are front views). FIG. 3 is a cross-sectional view in which

upper walls

5 and 6 are separated from each other for a region A in FIG. 2. It is the perspective view which looked at the bottom member 2 from lower side. FIG. 5 is a cross-sectional view of the region B in FIG. 4 through the center of a groove 2e. It is a perspective view which shows the state which opened the

upper walls

5 and 6 of the container 1 of FIG. It is a perspective view provided with the state which made the short side wall 4 fall over from the state of FIG. It is a perspective view provided with the state which made the long side wall 3 fall over from the state of FIG. It is a perspective view which shows the process of mounting the short side wall 4 to the bottom member 2. FIG. FIG. 10A is a perspective view of the area C in FIG. 9 seen at different angles, and FIG. 10B is an exploded view of FIG. 10A. It is an enlarged view of the area | region D in FIG. It is a perspective view which shows the process of mounting the long side wall 3 to the bottom member 2. FIG. 13A is an enlarged view of region E in FIG. 12, and FIG. 13B is an exploded view of FIG. 13A. FIG. 7 is an exploded view of a lower hinge member 7; FIG. 10 is a front view of the lower hinge member 7 with the lid 7a2 removed. It is a perspective view of the vicinity of the area | region E of FIG. 12, and shows the process of mounting the lower hinge member 7 to the bottom member 2. FIG. FIG. 17 is a cross-sectional view of the same cross section as FIG. 2 (lower hinge member 7 is a front view) showing a state after lower hinge member 7 is attached to bottom member 2 from the state of FIG. 16; 18A is an enlarged view of a region F in FIG. 12, and FIG. 18B is an exploded view of FIG. 18A. FIG. 10 is a perspective view of a state in which the engagement fitting 3 b and the engagement convex portion 3 c are shown in the vicinity of the area C in FIG. 9. FIG. 20A is a perspective view of a region G in FIG. 12 viewed at different angles, and FIG. 20B is an exploded view of FIG. 20A. The upper hinge member 8 is shown, FIG. 21A is a plan view, FIG. 21B is a front view, and FIG. 21C is an exploded perspective view. FIG. 22A is a cross-sectional view of the region G in FIG. 12 (the upper hinge member 8 is a front view), and FIGS. 22B to 22C show the state when the upper wall 5 is rotated. FIGS. 23A to 23C correspond to FIGS. 22A to 22C when there is no rotation restricting portion 8a3. It is an external appearance perspective view of folding container 1a concerning an embodiment of the 4th viewpoint of the present invention. It is an external appearance perspective view when the container main body 20 of the folding container 1a of FIG. 24 is seen from upper surface side. It is an external appearance perspective view when the container main body 20 of the folding container 1a of FIG. 24 is seen from lower surface side. FIG. 27A is a front view of the lid 10 of the container as viewed from the short side, and FIG. 27B is a front view of the container body 20 as viewed from the left and right side plates 50. It is an external appearance perspective view which shows the baseplate 30 of the container main body 20 of the folding container 1a of FIG. It is an end elevation when the resin panel which comprises the left-right side plate 50 of this embodiment is cut | disconnected by the surface perpendicular | vertical to the left-right direction. It is a block diagram (the longitudinal cross-sectional view about the member of the metal mold | die 221,231 and the part of the vicinity of it) which manufactures the resin-made panel which comprises the front and back side plate 60. FIG. 31A is a perspective view of the left and right end portions of the front and rear side plates 60 as viewed from inside and below, and FIG. 31B is a perspective view of the left and right end portions of the front and rear side plates 60 as viewed from the outside and above 31C is a perspective view of the front and rear end portions of the left and right side plates 50 as viewed from the outside and above, and FIG. 31D is a perspective view of the corner of the bottom plate 30 as viewed from the outside and above. FIG. 6 is an end view showing a state in which front and rear side plates 60 are raised with respect to a bottom plate 30. It is an external appearance perspective view which shows the state in the middle of making the left and right side plates 50 of the container main body 20 of folding container 1a fall. FIG. 25 is an external perspective view showing a state in which the front and rear side plates 60 are being turned over after the left and right side plates 50 of the container body 20 of the folding container 1a of FIG. 24 are turned over. It is an external appearance perspective view which shows the state which made the left-right side plate 50 and the front-back side plate 60 of the container main body 20 of the folding container 1a of FIG. 24 fall over. It is an external appearance perspective view which shows the folding state of the folding container 1a of FIG. It is a front view which shows the state which removed the front and back side plate 60 from the front view of FIG. 27B. It is an end elevation corresponding to Drawing 32 of bottom plate 30 and front and back side plate 60 concerning a modification of the present invention. 39A and 39B are end views corresponding to FIG. 32 of the bottom plate 30 and the front and rear side plates 60 according to another modification of the present invention. It is a schematic diagram which shows the contact part of the side plate 60 and the baseplate 30 of the conventional folding container 1a. It is a schematic diagram which shows the place which looked at the container main body 20 of the conventional folding container 1a from the front. It is an end elevation corresponding to Drawing 32 of bottom plate 30 and front and back side plates 60 concerning other modification of the present invention. It is an end elevation corresponding to Drawing 32 of bottom plate 30 and front and back side plates 60 concerning other modification of the present invention. It is an end elevation corresponding to Drawing 32 of bottom plate 30 and front and back side plates 60 concerning other modification of the present invention. It is a front view which shows the state which accommodated the folding container 1a in the outer container 16. FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(Embodiments of the First to Third Aspects)
1. Overall Configuration As shown in FIG. 1, the container 1 of the present embodiment is a built-up type cold storage container. The container 1 includes a bottom member 2, a pair of long side walls 3 facing each other, a pair of short side walls 4 facing each other, and first and second

upper walls

5 and 6. These members preferably have a sandwich structure in which a foam is sandwiched by resin sheets from the viewpoints of strength, heat insulation, lightness, etc., but may have another configuration, such as a hollow double wall structure or It may be a structure composed only of foam.

The container 1 has a substantially rectangular parallelepiped shape. The bottom member 2 and the

upper walls

5 and 6 face each other. The pair of short side walls 4 is disposed between the pair of long side walls 3. The pair of long side walls 3 and the pair of short side walls 4 constitute the side walls of the container 1. The

upper walls

5 and 6 constitute the lid of the container 1. These members are connected to each other such that no gap is provided between the members so as to enhance the sealing property of the container 1.

In the following description, top, bottom, left, right, front and back are defined as shown in FIG. 1 and FIG. That is, in the direction perpendicular to the main surface of the upper wall 5, the upper wall 5 side is "upper", the bottom member 2 side is "lower", and the front side in the direction perpendicular to the main surface of the long side wall 3 is "front" The rear side is referred to as “rear”, and the left side of FIG. 1 is referred to as “left” and the right side is referred to as “right” in the direction perpendicular to the main surface of the short side wall 4. We also refer to going "up" and "down" as "becoming higher" and "becoming lower." Also, "opposite" preferably faces in parallel.

As shown in FIG. 2, the long side wall 3 is rotatably connected to the bottom member 2 via the lower hinge member 7. The short side wall 4 is directly rotatably connected to the bottom member 2. The

upper walls

5 and 6 are rotatably connected to the long side wall 3 via the upper hinge members 8 respectively. The long side wall 3 and the short side wall 4 are connected to each other in the connecting mechanism 9. The bottom member 2 includes a bottom wall 2 q and a peripheral wall 2 i rising from the periphery of the bottom wall 2 q.

The short side wall 4 is provided with a recess 4 p that serves as a handle. The container 1 can be lifted by hooking a finger in the recess 4p. Further, the long side wall 3 is provided with a concave portion 3p which becomes a handle. In the case of a large container of about 40 L, the length of the arm may be insufficient to hook and lift the finger on the concave portions 4p of the short side walls 4 on the left and right. In such a case, the container 1 can be lifted by hooking a finger on the recess 3 p of the long side wall 3. The

upper walls

5 and 6 are provided with recesses 5 k and 6 k, respectively. By putting the thumb in the recesses 5k and 6k when hooking the finger in the recess 3p, the slip of the thumb is suppressed and the container 1 can be easily lifted.

Convex parts

5 r and 6 r are provided on the upper surface side of the

upper walls

5 and 6. The

protrusions

5r and 6r are provided at positions facing the recess 3p when the

upper walls

5 and 6 are opened as shown in FIG. Moreover, the

convex parts

5r and 6r are comprised so that fitting to the recessed part 3p is possible. When the

upper walls

5 and 6 are opened, the sliding movement of the

upper walls

5 and 6 with respect to the long side wall 3 is suppressed by fitting the

convex portions

5 r and 6 r to the concave portions 3 p. For example, in the folded state as shown in FIG. 8, the

upper walls

5 and 6 are prevented from relative movement toward the center in the front-rear direction with respect to the long side wall 3 by the fitting of the

convex portions

5 r and 6 r and the concave portion 3 p. It is done. In addition, relative movement of the

upper walls

5 and 6 toward the outside in the front-rear direction with respect to the long side wall 3 is suppressed by the upper hinge member 8 (see FIG. 22A).

As shown in FIG. 4, the lower surface 2 a of the bottom member 2 is provided with a pair of recesses 2 r and a pair of recesses 2 s. The recess 2 r is provided outside the recess 2 s in the front-rear direction. The recesses 2 r fit with the

protrusions

5 r and 6 r when the containers 1 are stacked in the assembled state. This makes it possible to stack the containers 1 stably.

As shown in FIG. 8,

convex portions

5 s and 6 s are provided on the

upper walls

5 and 6 on the surface opposite to the surface on which the

convex portions

5 r and 6 r are provided. The

convex portions

5s and 6s are directed to the upper side of the

upper walls

5 and 6 in a state where the container 1 is folded as shown in FIG. The

protrusions

5s and 6s fit into the recess 2s when the containers 1 are stacked in a folded state. This makes it possible to stack the containers 1 stably.

2. Configuration of

Upper Walls

5 and 6 As shown in FIGS. 2 to 3, the

upper walls

5 and 6 are provided with overlapping

portions

5 h and 6 h overlapping each other. In the overlapping

portions

5h and 6h, the total thickness of the

upper walls

5 and 6 is the same as the thickness of the

upper walls

5 and 6 in the adjacent portions 5i and 6i adjacent to the overlapping

portions

5h and 6h. The upper wall 5 has an inclined surface 5b which becomes lower toward the tip of the overlapping portion 5h. The upper wall 6 has an inclined surface 6b which rises toward the tip of the overlapping portion 6h. The inclination angles of the

inclined surfaces

5b and 6b are preferably the same, but may be different. When the inclination angles of the

inclined surfaces

5b and 6b are different, it is preferable that the inclination angle of the inclined surface 5b> the inclination angle of the inclined surface 6b. The abutment of the

inclined surfaces

5 b and 6 b prevents the formation of a gap between the

upper walls

5 and 6. When the upper wall 5 is pressed from above, the inclined surface 5 b slides on the inclined surface 6 b to apply a force in the direction in which the upper wall 5 approaches the upper wall 6. For this reason, even if the upper wall 5 is pressed from above by stacking the containers 1, the formation of a gap between the

upper walls

5 and 6 is suppressed.

As shown in FIG. 3, the inclination angle α of the inclined surface 5b is preferably 1 to 45 degrees with respect to the upper surface 5c (horizontal surface when the container 1 is placed on a horizontal surface). If this angle is too small, a gap is likely to be formed between the

upper walls

5 and 6. If this angle is too large, the

inclined surfaces

5b and 6b may be engaged to make it difficult to open the

upper walls

5 and 6. Specifically, the inclination angle α is, for example, 1, 5, 10, 15, 20, 25, 30, 35, 40, 45 degrees, and is in the range between any two of the numerical values exemplified here. May be

When the

upper walls

5 and 6 are closed, the end surface 5a of the overlapping portion 5h faces the end surface 6g of the adjacent portion 6i, and the end surface 6a of the overlapping portion 6h faces the end surface 5g of the adjacent portion 5i. The tip surfaces 5a, 5g, 6a, 6g are tapered surfaces that are inclined so as not to interfere easily when the

upper walls

5, 6 are closed. A groove 6c is provided at the base end of the inclined surface 6b. By providing the groove 6c, water attached to the

upper walls

5 and 6 by condensation or the like can easily flow toward the short side wall 4 along the groove 6c. Further, the bottom surface of the groove 6c is inclined so as to be lower from the center in the left-right direction toward the end, so that the water can flow more easily.

3. Configuration of the lower surface 2a of the bottom member 2 As shown in FIGS. 4 to 5, the lower surface 2a of the bottom member 2 is provided with recesses 2b in the vicinity of both ends in the left-right direction at the center in the front-rear direction. The recess 2 b is shallow from the deepest portion 2 c toward the end, and a step 2 d is provided in the middle. When lifting the container 1, if the tip of the finger is placed at the deepest portion 2 c and the finger is hooked on the step 2 d, it is possible to prevent the finger 1 from slipping and dropping the container 1. Further, a groove 2e is provided to connect the concave portions 2b in the vicinity of both ends. The groove 2e is formed shallower than the recess 2b. It is possible to lift the container 1 by hooking the belt in the groove 2e.

4. How to fold container 1 The method to fold container 1 will be described.
First, the

upper walls

5 and 6 are opened from the state of FIG. 1 to be in the state of FIG. In the state of FIG. 1, the ridge 4d (shown in FIG. 6) provided on the upper end of the short side wall 4 engages with the groove 6e (shown in FIG. 6) provided on the

lower surfaces

5d and 6d of the

upper walls

5 and 6. Thus, there is no gap between the short side wall 4 and the

upper walls

5 and 6. Therefore, in this state, although the short side wall 4 can not be rotated, the engagement of the ridge 4 d and the groove 6 e is released by opening the

upper walls

5 and 6, and the short side wall 4 can be rotated. It will be possible. Since the

upper walls

5 and 6 are connected to the long side wall 3 via the upper hinge member 8, the

upper walls

5 and 6 can be rotated until the

upper walls

5 and 6 are parallel to the long side wall 3. It has become.

Next, the short side wall 4 is turned over from the state of FIG. 6 to the state of FIG. The short side wall 4 is rotatably connected to the bottom member 2 by engaging the projecting shaft 4 c shown in FIG. 11 with the bearing hole 2 f of the bottom member 2. By pressing the short side wall 4, the short side wall 4 rotates about the bearing hole 2 f and falls inside the container 1. Further, by pushing the short side wall 4 toward the center of the container 1, the connection between the long side wall 3 and the short side wall 4 by the connection mechanism 9 is released.

Next, the long side wall 3 is turned over from the state of FIG. 7 to the state of FIG. Since the long side wall 3 is rotatably connected to the bottom member 2 via the lower hinge member 7, the long side wall 3 can be moved to the lower hinge member 7 by pushing the long side wall 3 toward the center of the container 1. , And falls to the inside of the container 1.

The container 1 can be folded in a compact manner by the above steps. When the container 1 is expanded, the long side wall 3 may be erected from the state of FIG. 8 to be in the state of FIG. 7, and the short side wall 4 may be erected from the state to be in the state of FIG. The long side wall 3 and the short side wall 4 are connected by the connecting mechanism 9 in conjunction with the operation of raising the short side wall 4, and the state in which the long side wall 3 and the short side wall 4 rise is maintained.

5. Method of assembling the container 1 The method of assembling the container 1 will be described.

<Mounting the latch structure 11 on the short side wall 4>
First, as shown in FIGS. 9 to 10, the latch structure 11 is attached to the main body 4a of the short side wall 4. The latch structure 11 includes a main body fitting 11a, a biasing member 11b, and a projecting member 11c. The biasing member 11 b is, for example, a plate spring made of resin. The main body fitting 11a includes a housing recess 11a1 and an engagement recess 11a2. When the projecting member 11c is pushed into the receiving recess 11a1 in a state where the biasing member 11b is disposed in the receiving recess 11a1, the projection 11c on the side surface of the projecting member 11c is a locking wall of the main body fitting 11a while being elastically deformed. The biasing member 11 b and the projecting member 11 c are held in the housing recess 11 a 1 by getting over the portion 11 a 3, and the latch structure 11 is obtained. The projecting member 11c is biased by the biasing member 11b in the direction of projecting from the opening end of the housing recess 11a1, but the projection 11c is accommodated by the locking wall 11a3 by the projection 11c1 being locked by the locking wall 11a3. It is held in 11a1. The latch structure 11 is pressed into and fixed to the side surface of the main body 4 a. This results in the structure shown in FIG. 10A.

<Connection of short side wall 4 and bottom member 2>
As shown in FIG. 9 and FIG. 11, the lower end of the short side wall 4 is provided with a convex stripe 4 b having a substantially arc-shaped cross section. The ridges 4 b extend in the front-rear direction (the width direction of the short side wall 4). Protruding shafts 4c are provided at both ends of the ridges 4b. At a position adjacent to a portion of the peripheral wall 2i of the bottom member 2 to which the short side wall 4 is attached, a concave 2g for housing the convex 4b is provided. Bearing holes 2f are provided at both ends of the recessed streak 2g. Inclined grooves 2h are provided so as to be connected to the bearing holes 2f. The tip end of the protruding shaft 4c is moved while being in contact with the inclined groove 2h, and the protruding shaft 4c is engaged with the bearing hole 2f. At this time, the ridge 4b is accommodated in the groove 2g. Thereby, the short side wall 4 is connected to the bottom member 2. If a pair of short side walls 4 are attached to the bottom member 2 and these are turned over, it will be in the state shown in FIG. In such a configuration, the close contact is maintained between the short side wall 4 and the bottom member 2 even if the short side wall 4 rotates with respect to the bottom member 2, so a gap is formed between the short side wall 4 and the bottom member 2 Is suppressed.

<Connection of Long Side Wall 3 and Lower Hinge Member 7>
Next, as shown in FIGS. 12 to 17, the lower hinge member 7 is attached to the main body 3a of the long side wall 3. The lower hinge member 7 includes a case 7a, a side wall locking member 7b, and a bottom member locking member 7c. The case 7a includes a main body 7a1 and a lid 7a2. The main body 7a1 can accommodate the side wall locking member 7b and the bottom member locking member 7c. The side wall locking member 7b includes a pair of protruding shafts 7b1 and a biasing portion 7b2 therebetween. The bottom member locking member 7c includes a pair of projecting portions 7c1 and a biasing portion 7c2 therebetween. The direction in which the protruding shaft 7b1 and the protruding portion 7c1 protrude is parallel.

The case 7a includes a pair of parallel side surfaces 7a3, a lower surface 7a4, and an inclined surface (hinge inclined surface) 7a5 therebetween. The protruding shaft 7b1 protrudes from the case 7a through an opening provided in the side surface 7a3. The protrusion 7c1 protrudes from the case 7a through an opening provided in the inclined surface 7a5. The lower surface 7a4 is provided with a lower side projecting portion 7a6 projecting downward.

The case 7a is provided with a guide wall 7a7 and a ridge 7a8. The protrusion 7c1 is configured to slide along the guide wall 7a7. In addition, since the protrusion 7c1 slides while being in contact with the two parallel ridges 7a8, rattling during slide movement is suppressed. The tip end surface 7c3 of the protrusion 7c1 is preferably substantially parallel to the inclined surface 7a5. Moreover, it is preferable that the tip 7c5 of the lower surface 7c4 of the protrusion 7c1 is inside the surface P in which the side surface 7a3 is extended. According to such a configuration, the lower hinge member 7 can be easily attached to the housing recess 2 j of the bottom member 2.

The protruding shaft 7b1 is biased by the biasing portion 7b2 in a direction to protrude from the case 7a. The projecting portion 7c1 is biased by the biasing portion 7c2 in a direction to protrude from the case 7a. The protruding shaft 7b1 and the biasing portion 7b2 may be integrally formed or may be separate members. The projecting portion 7c1 and the biasing portion 7c2 may be integrally formed or may be separate members.

As shown in FIGS. 13 and 17, on the inner surface side of the lower end of the long side wall 3, a housing recess 3d for housing the lower hinge member 7 is provided. The width of the housing recess 3 d is substantially the same as the width of the lower hinge member 7. Bearing holes 3e for bearing the projecting shaft 7b1 are provided on both sides in the width direction of the housing recess 3d. The lower hinge member 7 is rotatably connected to the long side wall 3 by inserting the lower hinge member 7 into the housing recess 3 d and engaging the protruding shaft 7 b 1 with the bearing hole 3 e in a state where the protruding shaft 7 b 1 is pressed and retracted. Be done. The housing recess 3 d does not penetrate the long side wall 3, and there is a wall surface 3 f outside the housing recess 3 d in the front-rear direction. Further, on the upper side of the lower hinge member 7, a circular arc surface 7d centering on the protruding shaft 7b1 is provided. In the accommodation recess 3d, a portion which the arc surface 7d abuts is an arc surface 3g having the same radius of curvature as the arc surface 7d. Therefore, the long side wall 3 rotates with respect to the lower hinge member 7 while maintaining the abutment of the arc surfaces 7d and 3g. According to such a configuration, the formation of a gap between the long side wall 3 and the lower hinge member 7 is suppressed.

Assuming that the protrusion amount of the protrusion shaft 7b1 is A and the protrusion amount of the protrusion 7c1 is B, it is preferable that A ≧ B, and more preferably A> B. Thus, since the amount of protrusion of the protrusion shaft 7b1 is relatively large, the protrusion shaft 7b1 is stably held in the bearing hole 3e.

<Connection of lower hinge member 7 and bottom member 2>
Next, the lower hinge member 7 is connected to the bottom member 2 as shown in FIGS. The lower hinge member 7 may be connected to the bottom member 2 before connecting the lower hinge member 7 to the long side wall 3. The lower hinge member 7 may be connected to the bottom member 2 after the long side wall 3 and the

upper walls

5 and 6 are connected by the upper hinge member 8.

On the inner surface side of the upper end of the peripheral wall 2i of the bottom member 2, a housing recess 2j for housing the lower hinge member 7 is provided. The housing recess 2 j has the same shape as the shape formed by the inclined surface 7 a 5 and the lower surface 7 a 4 of the lower hinge member 7. The accommodation recess 2 j has an inclined surface (recessed inclined surface) 2 k and a lower surface 21. The inclined surface 2k is inclined such that the width of the housing recess 2j narrows downward. The lower surface 21 is provided between the pair of inclined surfaces 2k. The lower hinge member 7 is inserted into the housing recess 2 j so as to be sandwiched by the pair of inclined surfaces 2 k.

In the inclined surface 2k, an engagement hole (inclined surface engagement hole) 2m that engages with the protrusion 7c1 is provided. The lower surface 21 is provided with an engagement hole (lower surface engagement hole) 2n that engages with the lower protrusion 7a6. When the lower hinge member 7 is inserted into the housing recess 2j, the protrusion 7c1 is retracted by being pushed by the inclined surface 2k until the protrusion 7c1 reaches the position of the engagement hole 2m, and the protrusion 7c1 is engaged with the engagement hole 2m When the second position is reached, the projection 7c1 is projected by the biasing force of the biasing portion 7c2 and the projection 7c1 is engaged with the engagement hole 2m. At this time, the lower protrusion 7a6 engages with the engagement hole 2n. According to such a configuration, the lower hinge member 7 can be coupled to the accommodation recess 2 j only by pressing the lower hinge member 7 from above with respect to the accommodation recess 2 j, so that the assembly efficiency is very excellent. There is. In addition, the housing recess 2j does not penetrate the peripheral wall 2i, and there is a wall surface 2o on the outside in the front-rear direction of the housing recess 2j. Therefore, the formation of a gap between the lower hinge member 7 and the bottom member 2 is suppressed.

As shown in FIG. 14 and FIG. 17, the outer surface of the lower hinge member 7 is provided with a recess 7 e at a portion in contact with the bottom member 2. By providing the recess 7e in this portion, it is possible to increase the thickness of the wall surface 2o. When the bottom member 2 has a sandwich structure in which a foam is sandwiched between a pair of resin sheets, the bottom member 2 can be manufactured using a split mold that opens and closes in the vertical direction. In this case, if the wall 2o is too thin, it becomes difficult to arrange the foam on the wall 2o. Therefore, by providing the concave portion 7e in the lower hinge member 7, it is possible to increase the thickness of the wall surface 2o. Moreover, in order to provide the recessed part 7e, the position of the protrusion 7c1 is closer to the center side of the container 1 than the protruding shaft 7b1.

As shown in FIG. 17, a ridge 2 p is provided at the upper end of the peripheral wall 2 i of the bottom member 2, and a ridge 3 h is provided at the lower end of the long side wall 3. The ridges 3h are disposed outside the ridges 2p, and the side surfaces of the ridges 3h and the ridges 2p are in contact with each other. According to such a configuration, the formation of a gap between the bottom member 2 and the long side wall 3 is suppressed.

<Connection of long side wall 3 and short side wall 4>
Next, as shown in FIG. 12 and FIG. 18 to FIG. 19, the engagement fitting 3 b is attached to the main body 3 a of the long side wall 3. The engagement fitting 3b can be attached by press fitting. The engagement fitting 3b is mounted at a position adjacent to the engagement projection 3c which protrudes from the inner surface of the main body 3a. A coupling mechanism 9 is configured by the latch structure 11, the engagement fitting 3b, and the engagement protrusion 3c. When the short side wall 4 is erected from the state shown in FIG. 7, the projecting member 11c shown in FIG. 10 abuts on the engaging convex portion 3c, and the projecting member 11c is pushed by the engaging convex portion 3c and retreats while being retracted. Get over section 3c.

When the projecting member 11c passes over the engaging convex portion 3c, as shown in FIG. 19, the projecting member 11c projects again, and the long side wall 3 and the short side wall 4 are connected by the connecting mechanism 9. When connected in such a manner, it is difficult for misalignment of the container to occur. Further, in this state, when the short side wall 4 is about to fall, the projecting member 11c abuts on the engagement convex portion 3c, so that the short side wall 4 is prevented from being overturned. At this time, the engagement projection 3b1 of the engagement fitting 3b enters the engagement recess 11a2 of the main body fitting 11a, and the engagement projection 3b1 abuts on the main body fitting 11a so that the short side wall 4 is not further opened. It has become. By such an action, the standing state of the short side wall 4 can be maintained. Further, in this state, the ridges 3i (shown in FIG. 18) of the long side wall 3 are disposed outside the ridges 4e (shown in FIG. 19) of the short side walls 4, and the side surfaces of the

ridges

3i and 4e Is in contact. According to such a configuration, the formation of a gap between the long side wall 3 and the short side wall 4 is suppressed.

In the container in which the latch structure 11 is not provided, there is a possibility that the

upper walls

5 and 6 may be closed in a state where the short side wall 4 is not completely erected. If the

upper walls

5 and 6 are closed in such a state, the ridges 4d of the short side walls 4 and the grooves 6e of the

upper walls

5 and 6 may interfere with each other and may be scraped, resulting in a reduction in sealing performance. On the other hand, in the present embodiment, since the latch structure 11 is provided, the

upper walls

5 and 6 can be closed in a state where the short side wall 4 is completely erected, and the interference between the ridge 4d and the groove 6e is suppressed. be able to. The container 1 of the present embodiment is assumed to repeatedly perform the opening and closing operation and the folding operation, and in such a case, the scraping due to the interference between the ridges 4 d and the grooves 6 e is likely to be remarkable. The technical significance of the provision is particularly great.

When it is desired to make the short side wall 4 fall, if a strong force is applied to the method of turning the short side wall 4 over, the connection by the connection mechanism 9 is released by moving over the engagement convex portion 3 c while the projecting member 11 c recedes. The side wall 4 can be turned over.

<Connection of Long Side Wall 3 and

Upper Walls

5 and 6>
Next, as shown in FIG. 12 and FIG. 20 to FIG. 22, the long side wall 3 and the

upper walls

5 and 6 are connected. One long side wall 3 and the upper wall 5 are connected, and the other long side wall 3 and the upper wall 6 are connected. The connection structure of the long side wall 3 and the upper wall 6 is the same as the connection structure of the long side wall 3 and the upper wall 5 and therefore, the connection of the long side wall 3 and the upper wall 5 will be described below as an example.

The long side wall 3 and the upper wall 5 are connected via the upper hinge member 8. The upper hinge member 8 includes a case 8a, an upper wall locking member 8b, and a side wall locking member 8c. The case 8a includes a main body 8a1 and a lid 8a2. The main body portion 8a1 can accommodate the upper wall locking member 8b and the side wall locking member 8c. The upper wall locking member 8b includes a pair of projecting shafts 8b1 and a biasing portion 8b2 therebetween. The side wall locking member 8c includes a pair of protruding shafts 8c1 and a biasing portion 8c2 therebetween. The protruding shafts 8b1 and 8c1 protrude from the case 8a through openings provided on the side surfaces of the case 8a. The protruding shafts 8b1 and 8c1 extend in parallel. The projecting shafts 8b1 and 8c1 are biased by the biasing portions 8b2 and 8c2 in a direction in which they protrude from the case 8a. The protruding shaft 8b1 and the biasing portion 8b2 may be integrally formed or may be separate members. The protruding shaft 8c1 and the biasing portion 8c2 may be integrally formed or may be separate members. The case 8 a is provided with a rotation restricting portion 8 a 3 which restricts the rotation of the upper hinge member 8.

As shown in FIGS. 20B and 22, on the outer surface side of the upper end of the long side wall 3, a housing recess 3j for housing the upper hinge member 8 is provided. The width of the housing recess 3 j is substantially the same as the width of the upper hinge member 8. Bearing holes 3k for bearing the protruding shaft 8c1 are provided on both sides in the width direction of the housing recess 3j. The upper hinge member 8 is rotatably connected to the long side wall 3 by inserting the upper hinge member 8 into the receiving recess 3j and engaging the protruding shaft 8c1 with the bearing hole 3k in a state where the protruding shaft 8c1 is pressed and retracted. Be done. The housing recess 3 j does not penetrate the long side wall 3, and there is a wall surface 3 l on the inner side in the front-rear direction of the housing recess 3 j. The upper hinge member 8 is provided with a circular arc surface 8d centered on the protruding shaft 8c1. In the accommodation recess 3j, a portion which the arc surface 8d abuts is an arc surface 3m having the same radius of curvature as the arc surface 8d. Therefore, the upper hinge member 8 rotates with respect to the long side wall 3 while maintaining the abutment of the arc surfaces 8d and 3m. According to such a configuration, the formation of a gap between the upper hinge member 8 and the long side wall 3 is suppressed.

As shown in FIGS. 20B and 22, at the proximal end of the upper wall 5, a housing recess 5 f for housing the upper hinge member 8 is provided. The width of the housing recess 5 f is substantially the same as the width of the upper hinge member 8. Bearing holes 5j for bearing the protruding shaft 8b1 are provided on both sides in the width direction of the housing recess 5f. The upper hinge member 8 is rotatably connected to the upper wall 5 by inserting the upper hinge member 8 into the housing recess 5f and engaging the protruding shaft 8b1 with the bearing hole 5j in a state where the protruding shaft 8b1 is pressed and retracted. Be done.

By the above process, the long side wall 3 and the

upper walls

5 and 6 are connected, and the container 1 assembled as shown in FIG. 6 is obtained.

6. How to close the

upper walls

5 and 6 As shown in FIG. 22, the upper wall 5 is closed by rotating the upper hinge member 8 about the projecting shaft 8c1 while rotating the upper wall 5 about the projecting shaft 8b1. be able to. The protruding shafts 8b1 and 8c1 are rotation shafts. The upper wall 6 is also the same.

In the present embodiment, the upper hinge member 8 is provided with the rotation restricting portion 8a3 on the lower side of the protruding shaft 8c1, and the upper hinge member 8 is formed by the rotation restricting portion 8a3 contacting the lower surface 3j1 of the housing recess 3j. It is designed not to rotate further. Therefore, the position of the protruding shaft 8b1 is always higher than that of the protruding shaft 8c1. Therefore, as shown in FIGS. 22B to 22C, when the upper wall 5 is gripped and rotated, the upper hinge member 8 is easily rotated about the protruding shaft 8c1, so the upper hinge member 8 rotates smoothly. And the upper wall 5 can be closed smoothly.

The plane passing through the projecting shafts 8b1 and 8c1 preferably has an angle β of 91 to 135 degrees with respect to the outer surface 3o of the long side wall 3, more preferably 100 to 120 degrees, specifically, for example, 91, 95 , 100, 105, 110, 115, 120, 125, 130, 135 degrees, and may be in the range between any two of the numerical values exemplified here.

If the upper hinge member 8 does not have a rotation restricting portion as shown in FIG. 23, the upper hinge member 8 is at the same position as the protruding shaft 8c1 or lower than the protruding shaft 8c1. It abuts on the lower surface 3j1 to prevent further rotation. In this state, when the upper wall 5 is gripped and rotated, the upper hinge member 8 may not be easily rotated about the protruding shaft 8c1, which may result in a state as shown in FIG. 23C. In such a state, the upper wall 5 can not be closed unless the upper hinge member 8 is rotated by directly applying a force to the upper hinge member 8, which is troublesome.

(Embodiment of the fourth aspect)

As shown in FIGS. 24 and 25, the folding container 1a of the present embodiment has a rectangular parallelepiped container body 20 having a bottom wall 13 and a side wall 14, and a lid for closing the accommodation space S (see FIG. 25) of the container body 20. And 10. Further, as shown in FIGS. 25 and 26, the folding container 1a includes a pair of left and right handles 80 disposed at opposite positions of the side walls, and two front and rear belts 90 connecting the pair of handles 80. Is equipped. In the following description, the direction perpendicular to the main surface of the side wall 14 (front and rear side plates 60) provided with the handle 80 is the left and right direction, and the direction perpendicular to the main surface of the side wall 14 (left and right side plates 50) without the handle 80 The side of the accommodation space S is inside (inward direction), and the opposite side is outside (outside direction). In addition, the folding container 1a of this embodiment is a foldable container in which each side wall 14 is connected to the bottom wall 13 in a fallable manner. Moreover, the folding container 1a of this embodiment is comprised as a cold storage container (or heat retention container) which maintains the temperature of a thing to be stored.

The lid 10 is a member having a rectangular planar shape and a predetermined thickness, as shown in FIGS. 24 and 27A. On the upper surface of the lid 10, a rectangular annular annular convex portion 10a in which the central portion is recessed is formed, and at the central portion of each short side of the lid 10, a fastening member 12 for fastening the lid 10 and the container body 20 is attached There is. Further, as shown in FIG. 27A, the lower surface of the lid 10 is formed with a downwardly projecting lower convex portion 15 having an outline smaller than the contour of the lid 10.

As shown in FIG. 25, the container body 20 includes a bottom plate 30 having a rectangular planar shape that constitutes the bottom wall 13, and a pair of left and right side plates 50 and a pair of front and rear side plates 60 that constitute the side wall 14. Here, the left and right side plates 50 have the same configuration on the left and right, and the front and rear side plates 60 have the same configuration on the front and rear. In the present embodiment, the width in the front-rear direction of the left and right side plates 50 is shorter than the width in the left-right direction of the front and rear side plates 60. Further, the left and right side plates 50 and the front and rear side plates 60 are connected to the bottom plate 30 so as to be upright and fall over, and are foldable. In the present embodiment, the lid 10, the bottom plate 30, the left and right side plates 50, and the front and back side plates 60 described above are each formed of a resin panel molded by blow molding. The specific configuration of the resin panel will be described later.

As shown in FIG. 28, the bottom plate 30 has a bottom wall 31 having a rectangular planar shape, and a pair of opposing left and right side peripheral wall portions 33 and a pair of front and rear side peripheral wall portions 34 rising from the periphery of the top surface of the bottom wall 31. Have. Connecting members 40 are provided at both ends of the left and right side peripheral wall portions 33 for connecting the left and right side plates 50 so as to be able to stand upright and fall over. A connecting member 41 is provided for connecting to the The connecting member 40 and the connecting member 41 restrict the rotation axes of the left and right side plates 50 and the front and back side plates 60, and the left and right side plates 50 and the front and back side plates 60 rotate around this rotation axis and fall upright. There is. The specific configuration of the connecting member 40 and the connecting member 41 may be any known configuration, and the detailed description thereof will be omitted. Further, the height of the left and right side peripheral wall portions 33 is lower than that of the front and rear side peripheral wall portions 34. This is because when the container body 20 is folded, the left and right side plates 50 are first folded, and the front and back side plates 60 are folded on the folded left and right side plates 50 (see FIGS. 33 and 34). At the center of the outer surface of the left and right side peripheral wall portion 33, a locking portion 33a is formed for locking the locking member 12 of the lid 10 when folded. As a structure of the latching | locking part 33a, simple structures, such as a velcro, a magnet, concavo-convex latching, concavo-convex fitting, can be used.

Further, as shown in FIG. 26, the bottom plate 30 is formed on the lower surface thereof in the vicinity of the connection portion of the long side and the short side, and a pair of front and rear convex portions 35a extending in the longitudinal direction near the front and rear side peripheral wall portion 34. It has four corner projections 35b and a central projection 35c formed in the central portion. When stacking the folding container 1a by the front and rear convex portions 35a, the corner projections 35b, and the central convex portion 35c, the folding container 1a is stacked by fitting with the concave annular convex portion 10a of the central portion formed on the top surface of the lid 10. The folding containers 1a are stabilized with each other.

In addition, as shown in FIGS. 26 and 27B, two grooves 36 extending to both ends are formed on the lower surface of the bottom plate 30 in the longitudinal direction, and a belt 90 described later is accommodated in the grooves 36. It has become. Further, both ends of the groove 36 are notches 36a inclined in the direction of the left and right side peripheral wall portions 33, and a rod-like holding portion 37 for passing and holding the belt 90 is stretched over the notches 36a. . Further, in the central portion near the boundary with the left and right side peripheral wall portion 33 on the lower surface of the bottom plate 30, there is formed a concave portion 38 into which a fingertip can be inserted when carrying the folded container 1a in a folded state.

As shown in FIGS. 25 to 27, the left and right side plates 50 are members having a substantially rectangular planar shape, and are configured to be foldable in the inward direction of the folding container 1a by the connecting member 40. The width in a front view of the left and right side plates 50 is smaller than the width of the left and right side peripheral wall portion 33 of the bottom plate 30 by about twice the thickness of the front and rear side plates 60. This is to avoid interference between the side plates at the time of folding by the thickness of each of the left and right side plates 50 and the front and rear side plates 60. Further, as shown in FIG. 25 and FIG. 27B etc., concave portions 57 are formed at both end portions of the left and right side plates 50, and are engaged with convex portions 67 of projecting portions 63 of the front and rear side plates 60 described later. There is. When the left and right side plates 50 are folded, the recessed portion 57 prevents the left and right side plates 50 and the connecting member 41 from interfering with each other (see FIGS. 25 and 33). In addition, the lower surface 57a of the recessed part 57 is curvilinear shape corresponding to rotation of folding.

On the outer surface of the left and right side plates 50, as shown in FIG. 27B, there are formed two grooves 53 extending upward from the lower end so as to be continuous with the grooves 36 and the notches 36a of the bottom plate 30, It is done. Further, a concave portion 54 deeper than the groove 53 is formed at the upper end of the groove 53 at a substantially intermediate position between the central portion in the height direction and the upper end (but not penetrating into the container). A rod-like holding portion 55 for passing and holding the belt 90 is bridged. A locking portion 56 for locking the locking member 12 of the lid 10 is formed at a central portion near the upper end of the outer surface of the left and right side plates 50. As a structure of the latching | locking part 56, simple structures, such as a velcro, a magnet, concavo-convex latching, concavo-convex fitting, can be used.

The front and rear side plates 60 are members having a substantially rectangular planar shape, and are configured to be foldable in the inward direction of the folding container 1 a by the connecting member 41. The width in the left-right direction of the front and rear side plates 60 is equal to the length of the front and rear side peripheral wall portion 34 of the bottom plate 30. Further, as shown in FIGS. 25, 29, 31A, 31C, etc., the overhanging portions 63 slightly overhanging along the left and right side peripheral wall portions 33 of the bottom plate 30 are formed at both ends of the front and rear side plates 60. A protrusion 67 is formed on a part of the end surface of the overhanging portion 63. Then, when the left and right side plates 50 and the front and rear side plates 60 are erected, the end face of the projecting portion 63 and the end face of the left and right side plate 50 are engaged, and the convex portion 67 of the overhanging portion 63 and the concave portion 57 of the left and right side plate 50 are engaged. Configured Although detailed description is omitted, the left and right side plates 50 and the front and back side plates 60 are fixed at the corner of the container body 20 in the vicinity of the position where the concave portion 57 and the convex portion 67 are formed. The lock mechanism 59 is formed (see FIG. 25).

The belt 90 is a belt-like member made of a material (cloth, rubber, string, etc.) having strength enough to support the folding container 1a together with the contents, and as shown in FIG. 25 and FIG. , And the outer surface of the other left and right side plates 50 through the lower surface of the bottom plate 30. In the present embodiment, two belts 90 are arranged side by side in the front-rear direction, and are accommodated in the groove 53 and the groove 36 on the lower surface of the bottom plate 30 and the outer surface of the left and right side plates 50, respectively. As shown in FIGS. 26 and 27B, one end and the other end of the two belts 90 pass through the holding portions 37 on the lower surface of the bottom plate 30, respectively, and then upward from the holding portions 55 provided on the left and right side plates 50. And each connected to the end of the handle 80. When the left and right side plates 50 are erected, the belt 90 is connected to the handle 80 in a state of being pulled out from the holding portion 55 by a predetermined length. In the present embodiment, the predetermined length of the belt 90 pulled out from the holding portion 55 is half or more of the thickness of the left and right side plates 50. The predetermined length is appropriately set from the thickness of the left and right side plates 50 and the configuration of the connecting member 40 (the position of the rotation shaft, etc.).

The handle 80 is for carrying the folded container 1a in the assembled state, and is disposed outside the left and right side plates 50 as shown in FIG. In the present embodiment, the handle 80 is formed by bending a material having the same width as the belt 90 in half along the longitudinal direction, and both ends (the front end and the rear end) are connected to the two belts 90 There is. In other words, it can be said that the two belts 90 pulled out from the two holding parts 55 are connected by the handle 80, thereby preventing the belt 90 from coming off the holding parts 55 and coming off There is. In addition, the handle 80 of the cloth material is not limited to being folded in two, and may be folded in three, for example. In addition, a cover can be attached to the handle 80. Furthermore, the handle 80 may be made of a material different from the belt 90.

By the way, the lid 10, the bottom plate 30, the left and right side plates 50, and the front and back side plates 60 of the present embodiment are respectively formed of resin panels molded by blow molding. Although the structure of the front and rear side plates 60 will be representatively described below, the structures of the other members, that is, the lid 10, the bottom plate 30, and the left and right side plates 50 are basically the same as the structure of the front and rear side plates 60.

As shown in FIGS. 29, 31A and 31B, the front and rear side plates 60 have an inner surface wall 161 forming the inner surface of the folding container 1a, an outer surface wall 162 forming the outer surface of the folding container 1a, and a lid 10, and a bottom side abutting wall 164 abutting on the front and rear side peripheral wall portion 34 of the bottom plate 30, and a heat insulating material 166 is preferably provided in the hollow portion formed by these. Be done. However, the entire outer surface of the heat insulating material 166 does not have to be welded to the inner surface wall 161, the outer surface wall 162, the lid side abutment wall 163 and the bottom side abutment wall 164, even if there is a gap between them. good. As the heat insulating material 166, one formed of any material such as foam, glass wool, silica airgel, vacuum heat insulating material, etc. can be used, and it is possible to combine various materials. As the foam, thermoplastic resins such as polyolefin resin, polystyrene, polycarbonate, ABS resin and the like and mixtures thereof, and thermosetting resins such as phenol resin, melamine resin, epoxy resin and polyurethane can be used. The expansion ratio of the foam or its thickness may be determined from the viewpoint of the heat insulation performance, sound insulation and sound absorption performance required for the specification application. For example, the expansion ratio is preferably 5 to 50 times, and the thickness is preferably about 10 to 100 mm. is there.

Although the overhanging portion 63 is formed at the end in the left-right direction of the front and rear side plates 60 in the present embodiment, the outer wall 162 includes the outer surface up to the outer surface of the overhanging portion 63 in the present specification. The end face and the inner surface are included in the inner wall 161. However, the “main surface of the inner surface wall” described later indicates the inner surface of the portion excluding the end surface and the inner surface of the projecting portion 63. Further, a step 163c1 is formed on the contact surface 163c of the lid-side contact wall 163, and a step 164c1 is formed on the contact surface 164c of the bottom-side contact wall 164 to contact the left and right side plates 50 of the inner wall 161. A step 161c1 is also formed on the contact surface 161c (see FIGS. 31A and 31B).

Hereinafter, the inner wall 161, the lid side abutting wall 163, and the bottom side abutting wall 164 are collectively referred to as "inner side wall 160". In the present embodiment, the expansion ratio of the inner wall 160 is higher than the expansion ratio of the outer wall 162. Therefore, the thermal conductivity of the inner wall 160 is lower than the thermal conductivity of the outer wall 162. The inner side wall 160 is a foam molding, and its foaming ratio is, for example, 1.1 to 6 times, and specifically, for example, 1.1, 1.5, 2, 2.5, 3, 3. 5, 4, 4.5, 5, 5.5, 6 and may be in the range between any two of the numerical values exemplified here. The expansion ratio of the outer surface wall 162 is, for example, 1 to 4 times, and specifically, for example, 1, 1.5, 2, 2.5, 3, 3.5, 4 and the numerical values exemplified here are It may be in the range between any two. The outer wall 162 preferably has a foaming ratio of 1, that is, a non-foamed molded body. The difference between the expansion ratio of the inner wall 160 / the expansion ratio of the outer surface wall 162 is preferably 0.5 to 5, and specifically, for example, 0.5, 1, 1.5, 2, 2.5, 3, 3 .5, 4, 4.5, 5 and may be in the range between any two of the numerical values exemplified here. The thickness of the inner wall 160 and the outer wall 162 is not particularly limited, but the ratio of the thickness of the inner wall 160 to the thickness of the outer wall 162 is preferably 1 to 5, and 1.2 to 3 Is more preferably, specifically, for example, 1, 1.2, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5 and the numerical values exemplified here It may be in the range between any two.

The front and rear side plates 60 configured as described above are molded by a foam molding machine 200 shown in FIG. The foam molding machine 200 includes a pair of resin

sheet forming devices

220 and 230 and a pair of split

molds

221 and 231. The resin

sheet forming apparatus

220, 230 includes a hopper 212, an extruder 213, an injector 216, an accumulator 217, and a T-die 218. The extruder 213 and the accumulator 217 are connected via a connecting pipe 225. The accumulator 217 and the T-die 218 are connected via a connecting pipe 227. Each component will be described below.

The hopper 212 is used to introduce the raw resin 211 into the cylinder 213 a of the extruder 213. Although the form of raw material resin 211 is not specifically limited, Usually, it is a pellet form. The raw material resin is, for example, a thermoplastic resin such as polyolefin, and examples of the polyolefin include low density polyethylene, linear low density polyethylene, high density polyethylene, polypropylene, ethylene-propylene copolymer and mixtures thereof. The raw material resin 211 is introduced into the cylinder 213a from the hopper 212, and then is melted by being heated in the cylinder 213a to become a molten resin. Further, it is conveyed toward the tip of the cylinder 213a by the rotation of a screw disposed in the cylinder 213a. The screw is disposed in the cylinder 213a, and the molten resin is conveyed while being kneaded by its rotation.

The cylinder 213a is provided with an injector 216 for injecting the foaming agent into the cylinder 213a. When the raw material resin 211 is not foamed, the foaming agent is not injected. The blowing agent injected from injector 216 may include physical blowing agents, chemical blowing agents, and mixtures thereof, with physical blowing agents being preferred. As physical blowing agents, inorganic physical blowing agents such as air, carbon dioxide gas, nitrogen gas, water and the like, organic physical blowing agents such as butane, pentane, hexane, dichloromethane, dichloroethane and the like, and their supercritical fluids are used. be able to. As a supercritical fluid, it is preferable to use carbon dioxide, nitrogen, etc., and if it is nitrogen, its critical temperature is -149.1 ° C, its critical pressure is 3.4 MPa or more, and if it is carbon dioxide, its critical temperature is 31 ° C, its critical pressure It is obtained by setting it as 7.4 MPa or more. As a chemical foaming agent, what generates carbon dioxide gas by the chemical reaction of an acid (example: citric acid or its salt) and a base (example: sodium bicarbonate) is mentioned. The chemical blowing agent may be fed from the hopper 212 instead of the injector 216.

The molten resin 211 a to which the foaming agent is added or not added is extruded from the resin extrusion port of the cylinder 213 a and injected into the accumulator 217 through the connecting pipe 225. The accumulator 217 includes a cylinder 217 a and a piston 217 b slidable therein, and the molten resin 211 a can be stored in the cylinder 217 a. Then, after the molten resin 211a is stored in the cylinder 217a by a predetermined amount, the piston 217b is moved to push down the molten resin 211a from the slit provided in the T-die 218 through the connecting pipe 227 and make the resin sheet 223 fall. , 233. The expansion ratio of the

resin sheets

223 and 233 is appropriately set such that the inner side wall 160 and the outer surface wall 162 have a desired expansion ratio.

The

resin sheets

223 and 233 are guided between the pair of split

molds

221 and 231. In addition, a heat insulating material 166 is disposed between the

resin sheets

223 and 233. The mold 221 includes a cavity 221 a having a shape that forms the inner side wall 160 of the front and rear side plates 60, and a pinch off portion 221 b. On the other hand, the mold 231 only forms the outer surface wall 162, and is formed substantially flat. By molding the

resin sheets

223 and 233 using such a pair of split

molds

221 and 231, front and rear side plates 60 as shown in FIG. 29 can be obtained. In addition, as an interior method of the heat insulating material 166, the method of sandwiching the heat insulating material 166 may be used as described above, or a hollow body may be formed and then the heat insulating material may be filled later. When the heat insulating material 166 is a foam, a method may be used in which foam beads are filled in the hollow body to foam.

When the front and rear side plates 60 are formed by the split

molds

221 and 231 having the above-described shape, the lid side contact wall 163 contacting the lid 10 and the bottom side contact wall contacting the front and rear side peripheral wall portion 34 of the bottom plate 30 Although all the resin sheets 164 are formed by the resin sheet 223, it is possible to form a part of the contact surface by the resin sheet 233 by changing the position of the parting line.

Further, the method of molding using the split

molds

221 and 231 is not particularly limited, and blow molding may be performed by blowing air into the cavities of the split

molds

221 and 231, and the split molds 221, The inside of the cavity may be decompressed from the inner surface of the cavity 231 to form the

resin sheets

223 and 233, or the combination may be used.

The inner wall 151 (see FIG. 25) forming the inner surface of the left and right side plates 50, the lid side contact wall 153 in contact with the lid 10, and the left and right peripheral wall portions of the bottom plate 30 by the same method as the manufacturing method of the front and rear side plates 60. The bottom side abutment wall 154 abutting on 33 and the front and back abutment wall 155 (see FIG. 31C) abutting on the front and rear side plates 60 are integrally formed of the resin sheet 223. Further, the outer wall 152 forming the outer surface is formed of the resin sheet 233. In the bottom plate 30, an inner wall 131 forming the inner surface of the bottom wall 31 and the

peripheral walls

33 and 34, and a side plate contact wall forming the contact surfaces 133c and 134c of the

peripheral walls

33 and 34 in contact with the

side plates

50 and 60. The components 133 and 134 (see FIGS. 28 and 31D) are integrally formed of the resin sheet 223. Further, the outer wall 132 (see FIG. 26) forming the outer surface (the lower surface and the side surface) is formed of the resin sheet 233. On the other hand, in the lid 10, as shown in FIG. 27, the inner wall 111 forming the lower surface is molded by the resin sheet 223, and the outer wall 112 forming the upper surface and the side is molded by the resin sheet 233. A heat insulating material is also provided in the hollow portions of the lid 10, the bottom plate 30, and the left and right side plates 50.

Next, the folding and assembling operations of the folding container 1a constituted by the resin panels (the lid 10, the bottom plate 30, the left and right side plates 50, and the front and back side plates 60) molded as described above are shown in FIGS. Refer to the description.

When folding the folding container 1a, with the lid 10 removed, as shown in FIG. 33, first, the fixation of the left and right side plates 50 and the front and back side plates 60 by the lock mechanism 59 is released and the left and right side plates 50 are bottom plates 30 The member 40) is turned and turned over. At this time, since the belt 90 of the present embodiment is connected to the handle 80 with a slight play from the holding portion 55, the belt 90 pulled out with the rotation of the left and right side plates 50 is pulled back. Thus, the left and right side plates 50 can be completely overturned.

After the left and right side plates 50 are completely turned over as described above, next, the front and rear side plates 60 are turned relative to the bottom plate 30 (the connecting member 41) to be turned over (see FIG. 34). At this time, since the height of the front and rear side peripheral wall portions 34 is higher than that of the left and right side peripheral wall portions 33, the front and rear side plates 60 can be folded on the left and right side plates 50 folded first. There is. When the front and rear side plates 60 are completely turned over, as shown in FIG. 35, the left and right side plates 50 and the handle 80 are covered by the front and rear side plates 60. Then, finally, the lid 10 is placed on the folded front and rear side plates 60, and the fastening member 12 is engaged with the engaging portions 33a of the left and right side peripheral wall portions 33 to complete the folding operation (see FIG. 36). ).

On the other hand, when assembling the folding container 1a, on the contrary to the above, the lid 10 is first removed, the front and rear side plates 60 are erected, and then the left and right side plates 50 are erected. It fixes and completes the folding container 1a (refer FIG.25 and FIG.32).

By the way, also in Patent Document 4, as shown in FIG. 40, in order to enhance the sealing property, a stepped portion (step) is formed on the upper surface of the side portion of the bottom plate 30, and a lower ridge is formed on the lower end surface of the side plate 60. There is disclosed a container (container) configured to be engageable. In this container, when folding the side plate 60, the rotation axis X of the side plate 60 is provided between the inner wall 161 and the outer wall 162, specifically, the rotation axis X is provided at the center of the inner wall 161 and the outer wall 162. The upper end of the inner surface of the lower end of the inner wall 161 of the side plate 60 may interfere with the upper end of the inner surface of the peripheral wall portion 34 of the bottom plate 30. Therefore, when forming a non-contacting portion U1 which is a gap formed by notching the corner inside the container on the contact surface of the side plate 60 and / or the bottom plate 30 (only the side plate 60 in FIG. 40), the side plate 60 is folded. To prevent interference.

However, when such a non-contacting portion U1 is provided, the area in which the side plate 60 and the bottom plate 30 abut is reduced, so that the sealing property is insufficient, air leakage occurs, and the heat retaining property is impaired. There was a fear.

Further, as shown in FIG. 40, when the rotation axis X of the side plate 60 is between the inner wall 161 and the outer wall 162, specifically, at the center of the inner wall 161 and the outer wall 162, On the inner surface side of the container, as shown in FIG. 41, a non-contacting portion U2 must be provided to prevent interference with the front and rear side peripheral wall portions 34. In addition, since the overhanging portion 63 is positioned closer to the inner surface of the container with respect to the rotation axis X, the non-contacting portion U2 has to be cut out deeper than the non-contacting portion U1.

In this respect, in the configuration of the present invention, the rotation axes of the front and rear side plates 60 rotatably attached to the front and rear side peripheral wall portion 34 of the bottom plate 30 by the connecting member 41 (see FIG. 25) are shown in FIGS. As schematically shown, the inner surface of the container 1 than the center of the inner wall 161 and the outer wall 162, particularly in the configuration of the present embodiment, the main surface of the inner wall 161 (in the cross-sectional view of FIG. 32). It is arranged so as to be more inside of the container 1 than the inner surface of the container. With such a configuration, it is not necessary to provide a gap (non-contacting portion U1, see FIG. 40) at the inner corner of each member while avoiding interference between the front and rear side plates 60 and the front and rear side peripheral wall portion 34 of the bottom plate 30. It is possible to contact the bottom plate 30 over the entire thickness of the side plate 60, and the sealing performance can be improved.

In addition, as shown in FIG. 27, the rotary shaft A is disposed on the inner side of the inner wall 161 rather than the inner wall 161, so that the non-contacting portion U2 (see FIG. The lower end of the overhanging portion 63 can come into contact with the bottom plate 30 in the front-rear direction without the need to provide the reference 41.

Further, when the front and rear side plates 60 are erected, the contact surface 164c of the bottom side contact wall 164 of the front and rear side plate 60 is the side plate contact wall 134 of the front and rear side peripheral wall portion 34 of the bottom plate 30, as shown in FIG. It abuts on the abutment surface 134c. Here, as shown in FIGS. 31A and 32, a step 164c1 is formed on the contact surface 164c of the front and rear side plates 60, and a step 134c1 formed on the contact surface 134c of the side plate contact wall 134 of the bottom plate 30. 31D and 32), the bottom side contact wall 164 and the side plate contact wall 134 are in close contact with each other, and air flows in the contact surfaces 164c and 134c (that is, the front and rear side plates 60 and the bottom plate 30). It is possible to suppress the flow of air). Moreover, in the present embodiment, the bottom side abutment wall 164 forming the abutment surface 164c and the side plate abutment wall 134 forming the abutment surface 134c are both foam molded bodies, and the abutment surface acts as a cushion Since it is slightly compressed, air flow can be further suppressed as compared with the case where the contact surfaces 164c and 134c are formed of non-foam resin. In addition, when the

contact walls

134 and 164 are non-foamed, the structure of the inner surface can be easily raised by the external air heat passing through the resin (heat bridge), but in the present invention, the

contact walls

134 and 164 are used. Since it is a foam molded body, it has a structure in which heat is less likely to be transmitted.

Similarly, a step 155c1 is formed on the contact surface 155c of the front and rear contact walls 155 of the left and right side plates 50 (see FIG. 31C), and a step 161c1 is formed on the contact surface 161c of the inner surface wall 161 of the front and rear side plates 60. (See FIG. 31B). Further, the bottom side abutment wall 164 forming the abutment surface 164c and the side plate abutment wall 134 forming the abutment surface 134c are both foam molded bodies. Therefore, the flow of air between the left and right side plates 50 and the front and rear side plates 60 can be effectively suppressed.

Further, a step 163c1 is formed on the contact surface 163c of the lid side contact wall 163 of the left and right side plates 50 (see FIG. 31B), and a step 153c1 is formed on the contact surface 153c of the lid side contact wall 153 of the front and rear side plates 60. A step 153c1 is formed on the contact surface 111c of the inner wall 111 of the lid 10 (see FIG. 31A). The lid side abutment wall 163 forming the abutment surface 163c, the lid side abutment wall 153 forming the abutment surface 153c, and the inner wall 111 forming the abutment surface 111c are respectively foam molded articles. Therefore, it is possible to effectively suppress the flow of air between the left and right side plates 50 and the front and rear side plates 60 and the lid 10.

Furthermore, in the present embodiment, there is no need to provide a non-contacting portion U2 (see FIG. 41) between the front and rear side plates 60 and the front and rear side peripheral wall portion 34. Step 155c1 (see FIGS. 31c and 37) of 155c and step 161c1 (see FIG. 31B) of the contact surface 161c of the front and rear side plates 60 are formed to the end (especially to the lower end) along the longitudinal direction (vertical direction) It has become possible. As a result, the left and right side plates 50 are also in contact with the bottom wall 13 at the portions where the left and right side plates 50 and the front and rear side plates 60 abut, that is, at the portions where the bottom plate 30, the left and right side plates 50, and the front and rear side plates 60 are in contact. The front and rear side plates 60 overlap in the direction from the inside of the container toward the outside of the container, so that the contact area can be increased to improve the sealing performance. In the present embodiment, the rotation axes of the left and right side plates 50 are provided between the inner surface wall 161 and the outer surface wall 162 of the left and right side plates 50 as shown in FIGS. 28 and 31C.

In the present embodiment, the outer wall 132 of the bottom plate 30 forming the outer surface of the folding container 1a, the outer wall 152 of the left and right side plates 50, the outer wall 162 of the front and rear side plates 60, and the outer wall 112 of the lid 10 have a low expansion ratio. . Therefore, it is possible to improve the appearance and cleanability of the container 1. Furthermore, since the expansion ratio of the outer surface wall 112 is low, the structures such as the holding portion 37 and the holding portion 55 for holding the belt 90 can be attached to the outer surface wall by welding or the like.

On the other hand, since the inner wall 131 of the bottom plate 30 forming the outer surface of the folding container 1a, the inner wall 151 of the left and right side plates 50, the inner wall 161 of the front and rear side plates 60, and the inner wall 111 of the lid 10 are respectively foam molded articles It has become possible to improve.

In addition, this embodiment can also be implemented in the following modes.
In the above embodiment, as shown in FIG. 32, the inner wall 131 and the side plate contact wall 134 of the bottom plate 30 and the inner wall 161 and the bottom side contact wall 164 of the front and rear side plates 60 are integrally molded with the same thickness. However, as shown in FIG. 38, the side plate contact wall 134 of the bottom plate 30 and the bottom side contact wall 164 of the front and rear side plates 60 are compared to the thickness h1 of the inner wall 131 of the bottom plate 30 and the inner wall 161 of the front and rear side plates 60. It is also preferable to form thick the thickness h2 of the fitting portion of. In this case, since the part-foamed product is thickly molded, the sealing property can be further improved by crushing the part. Further, in the present modification, the

contact walls

134 and 164 are formed into a foam, and the thickness h2 is formed to be thick, so that heat is less likely to be transmitted.
In the above embodiment, as shown in FIG. 32, the contact surface 164c of the bottom contact wall 164 of the front and rear side plates 60 and the contact surface 134c of the side plate contact wall 134 of the bottom plate 30 have the step 164c1 and the step 134c1. However, the air flow is suppressed by providing the overlapping portion, but it is also possible to form the contact surface flat as shown in FIG. 39A. Also in this case, it is possible to suppress the flow of air on the contact surfaces 164c and 134c. Also, as shown in FIG. 39B, the contact surfaces 164c and 134c can be formed on the wave. As a result, the contact area of the contact surfaces 164c and 134c is increased, and the flow of air can be further suppressed.
In the above embodiment, the handle 80 is attached to the folding container 1a via the belt 90. However, the handle 80 may be directly welded to the outer surface wall 152 or the like of the left and right side plates 50.
-Although the folding container 1a was a rectangular parallelepiped shape in the said embodiment, it can also be made into other shapes, such as a column shape.
It is also possible to attach a structure other than the handle to the

outer side walls

152 and 162 of the left and right side plates 50 and the front and rear side plates 60.
In the above embodiment, the entire area of the contact surface 164c of the bottom contact wall 164 of the front and rear side plates 60 is a foam molding, but the parting line of the

molds

221 and 231 to be molded is changed Thus, it is possible to form a partial region of the contact surface 164c integrally with the outer wall 162 with a non-foamed molded product or a molded product with a low expansion ratio. However, in order to ensure the sealing property, the foaming ratio of the portion corresponding to the region of 60% or more in the entire region of the contact surface 164c is configured to be higher than the foaming ratio of the outer surface wall 162 preferable. Further, it is more preferable that the expansion ratio of the portion corresponding to the area of 80% or more be higher than the expansion ratio of the outer wall 162. In addition, this can be said about not only the contact surface 164c of the bottom side contact wall 164 of the front and back side plate 60 but all the contact surfaces.
In the above embodiment, the lid 10, the bottom plate 30, the left and right side plates 50, and the

inner walls

111, 131, 151, and 161 of the front and rear side plates 60 are foam moldings, but all members are non-foam moldings. Is also possible. Even in this case, by providing a step on each contact wall and arranging the rotation axis of the side wall on the inner side of the container rather than the inner surface wall, the contact area between the members is increased to improve the sealing performance. It has become possible.

In the above embodiment, the

contact walls

134 and 164 are formed of the resin sheet 223. However, as shown in FIGS. 42 to 44, the heat insulating material 136 is interposed between the

inner surface walls

131 and 161 and the

outer surface walls

132 and 162. , 166, and at least a portion of the

abutment walls

134, 164 may be constituted by the thermal insulators 136,166. In this case, at least a part of the contact surfaces 134c and 164c is constituted by the

heat insulators

136 and 166. Since the

heat insulators

136 and 166 are generally disposed over substantially the entire space between the

inner surface walls

131 and 161 and the

outer surface walls

132 and 162, as shown by the dotted line L in FIGS. Of the

portions

136 and 166, portions near the abutting

surfaces

134c and 164c (portions whose distances from the abutting

surfaces

134c and 164c are equal to or less than the thickness of the inner wall 131 or 161) are defined as the abutting

walls

134 or 164.

Since the thermal conductivity of the

thermal insulators

136 and 166 is usually lower than that of the resin sheet 223, the thermal insulation of the container can be enhanced by forming at least a part of the

abutment walls

134 and 164 by the

thermal insulators

136 and 166. . The

heat insulators

136 and 166 are preferably foams, and the foam ratio of the foams is preferably higher than the foam ratio of the

inner walls

131 and 161. In this case, the heat retaining property and the sealing property are particularly good.

In the configuration of FIG. 42, the

inner wall

131, 161 and the

outer wall

132, 162 are not bent at the end, and the inner wall 131 and the inner wall 161, and the outer wall 132 and the outer wall 162 only abut on that end. In the configuration of FIG. 43, the

inner wall

131, 161 is bent at the end, and the

outer wall

132, 162 is not bent at the end. In the configuration of FIG. 44, the

inner wall

131, 161 and the

outer wall

132, 162 are both bent at the end. Of the contact surfaces 134c and 164c, the proportions occupied by the

heat insulating materials

136 and 166 decrease in the order of FIGS. 42, 43, and 44, and the heat retention property decreases in this order. On the other hand, since the strength of the

heat insulating material

136, 166 is usually lower than the

inner wall

131, 161 and the

outer wall

132, 162, the strength of the container becomes higher in the order of FIG. 42, FIG. 43 and FIG.

The configuration shown in FIG. 42 to FIG. 44 may be adopted in one of the bottom wall 13 and the side wall 14, and the configuration of the above embodiment or modification may be adopted in the other.

-As shown in FIG. 45, the folding container 1a may be accommodated in the outer container 16. The outer container 16 is composed of the first and

second members

16a and 16b, and a closed space capable of containing the folding container 1a is formed in a state where the first and

second members

16a and 16b are combined. In FIG. 45, the first member 16a has a container shape having a volume capable of accommodating the outer container 16, and the second member 16b has a lid shape. For example, the first and

second members

16a and 16b are not Also, it may be in the form of a container.

Each of the first and

second members

16a and 16b is integrally formed and has no joint. For this reason, the outer container 16 comprised by 1st and

2nd member

16a, 16b is excellent in sealing property and heat retention. For this reason, in an application where a high degree of airtightness and heat retention is particularly required for the folding container 1a, deterioration of the contents can be suppressed by containing the folding container 1a in the outer container 16 and carrying it.

The method of manufacturing the first and

second members

16a and 16b, the layer configuration, the configuration of the contact surface, and the like are not particularly limited, and the same ones as those described for the folding container 1a can be employed.

(Codes of Embodiments of First to Third Aspects)
1: Container,
2: Bottom member, 2a: lower surface, 2b: recess, 2c: deepest portion, 2d: step, 2e: groove, 2f: bearing hole, 2g: recess, 2h: inclined groove, 2i: peripheral wall, 2j: accommodation recess , 2k: inclined surface, 2l: lower surface, 2m: engagement hole, 2n: engagement hole, 2o: wall surface, 2p: ridge, 2r: recess, 2s: recess,
3: Long side wall, 3a: main body, 3b: engagement metal fitting, 3b1: engagement projection, 3c: engagement projection, 3d: accommodation recess, 3e: bearing hole, 3f: wall surface, 3g: arc surface, 3h : Convex line, 3i: convex line, 3j: accommodation recess, 3j1: lower surface, 3k: bearing hole, 3l: wall surface, 3m: arc surface, 3o: outer surface, 3p: recess,
4: short side wall, 4a: main body, 4b: ridge, 4c: projecting axis, 4d: ridge, 4e: ridge, 4p: recess,
5: first upper wall, 5a: tip surface, 5b: inclined surface, 5c: upper surface, 5d: lower surface, 5f: accommodation recess, 5g: tip surface, 5h: overlapping portion, 5i: adjacent portion, 5j: bearing hole, 5k: concave portion, 5r: convex portion, 5s: convex portion 6: second upper wall, 6a: tip surface, 6b: inclined surface, 6c: groove, 6d: lower surface, 6e: groove, 6g: tip surface, 6h: overlapping Part, 6i: adjacent part, 6k: concave part, 6r: convex part, 6s: convex part 7: lower hinge member, 7a: case, 7a1: main body, 7a2: lid, 7a3: side surface, 7a4: lower surface, 7a5: Inclined surface, 7a6: lower side protrusion, 7a7: guide wall, 7a8: ridge, 7b: side wall locking member, 7b1: protruding shaft, 7b2: biasing portion, 7c: bottom member locking member, 7c1: protrusion , 7c2: biasing portion, 7c3: tip surface, 7c4: lower surface, 7c5: tip, 7d: arc surface, 7e: recess,
8: upper hinge member, 8a: case, 8a1: main body, 8a2: lid, 8a3: rotation restricting portion, 8b: upper wall locking member, 8b1: protruding shaft, 8b2: biasing portion, 8c: side wall locking Member, 8c1: projecting shaft, 8c2: biasing portion, 8d: arc surface,
9: Coupling mechanism,
11: latch structure, 11a: main body fitting, 11a1: accommodation recess, 11a2: engagement recess, 11a3: locking wall, 11b: biasing member, 11c: projecting member, 11c1: projection

(Code of Embodiment of Fourth Aspect)
DESCRIPTION OF SYMBOLS 1a: Folding container, 10: Lid, 10a: Annular convex part, 12: Fastening member, 13: Bottom wall, 14: Side wall, 16: Outer container, 16a: 1st member, 16b: 2nd member, 15: Down convex Parts, 20: container main body, 30: bottom plate, 31: bottom wall part, 33: left and right side peripheral wall part, 33a: locking part, 34: front and rear side peripheral wall part, 35a: convex part, 35b: corner part projection, 35c: Center convex portion 36: groove 36a: notch 37: holding portion 38: concave portion 40: connecting member 41: connecting member 50: left and right side plates 53: groove 54: concave portion 55: holding portion 56: locking portion, 57: concave portion, 57a: lower surface, 59: locking mechanism, 60: front and rear side plates, 63: projecting portion, 67: convex portion, 80: handle, 90: belt, 100: foam molding machine, 111 : Inner surface wall, 111c: Contact surface, 112: Outer surface wall, 130: Resin sheet forming apparatus 131: inner surface wall, 132: outer surface wall, 133: side plate contact wall, 133c: contact surface, 134: side plate contact wall, 134c: contact surface, 134c1: step, 136: heat insulator, 151: inner surface wall, 152: outer surface wall, 153: lid side contact wall, 153c: contact surface, 153c1: step, 154: bottom contact wall, 155: contact wall, 155c: contact surface, 155c1: step, 160: inside Wall 161: inner surface wall 161c: contact surface 161c1: step difference 162: outer surface wall 163: lid side contact wall 163c: contact surface 163c1: step difference 164: bottom contact wall 164c: Abutment surface, 164c1: step, 166: heat insulator, 211: raw resin, 212: hopper, 213: extruder, 213a: cylinder, 216: injector, 217: accumulator, 217a: cylinder, 217b: Stone, 218: T die, 220: resin sheet forming device, 221, 231: split mold, 221a: cavity, 221b: pinch off portion, 223, 233: resin sheet, 225, 227: connecting pipe, 230: resin sheet formation Device, S: Accommodation space

Claims

A container,
A side wall, an upper hinge member, and an upper wall,
The upper hinge member and the side wall are rotatably coupled about a first rotation axis,
The upper hinge member and the upper wall are rotatably connected about a second rotation axis,
The container, wherein the first and second axes of rotation are parallel.
A container according to claim 1, wherein
A container, wherein the second rotation axis is always arranged above the first rotation axis.
A container according to claim 2, wherein
The upper hinge member includes a rotation restricting portion that restricts the rotation of the upper hinge member.
A container configured such that the second rotation shaft does not become lower than the first rotation shaft by the rotation restricting portion contacting the side wall.
A container according to claim 2 or claim 3, wherein
The plane passing through the first and second axes of rotation has an angle of 91 to 135 degrees with respect to the outer surface of the side wall.
A container according to any one of the preceding claims, wherein
The first rotation shaft is disposed in a recess provided on the outer surface side of the side wall,
The container, wherein the recess is configured not to penetrate the side wall.
The container according to any one of claims 1 to 5, wherein
Assuming that the side wall is a first side wall and the upper wall is a first upper wall,
Second to fourth side walls, a second upper wall, and a bottom member,
The first and second side walls face each other,
The third and fourth side walls are provided opposite to each other and between the first and second side walls,
The first to fourth side walls are configured to be rotatable with respect to the bottom member,
The container, wherein the second upper wall is configured to be rotatable relative to the second side wall.
A container,
A side wall, a lower hinge member, and a bottom member;
The lower hinge member and the side wall are rotatably connected;
The lower hinge member includes a hinge inclined surface which is inclined so that the width of the lower hinge member is narrowed toward the lower end.
The lower hinge member has a projection biased in a direction to project from the hinge inclined surface,
The bottom member is provided with a recess having a recessed inclined surface inclined so as to narrow in width downward,
An inclined surface engaging hole is provided on the inclined surface of the recess,
The projection is configured to retract when pressed against the recess slope surface,
The container, wherein the protrusion is configured to be engageable with the inclined surface engagement hole.
A container according to claim 7, wherein
A lower surface engaging hole is provided on the lower surface of the recess,
The lower hinge member includes a lower protrusion projecting toward the lower surface engagement hole,
The container, wherein the lower protrusion is configured to be engageable with the lower surface engagement hole.
A container according to claim 7 or 8, wherein
The recessed sloped surface comprises first and second recessed sloped surfaces,
The first and second recess slopes are provided to sandwich the lower hinge member,
The protrusion comprises first and second protrusions,
A container, wherein the first and second protrusions are configured to protrude towards the first and second recess slopes, respectively.
A container according to any one of claims 7 to 9, wherein
The container, wherein the tip of the protrusion is configured to be parallel to the concave slope.
A container according to any one of claims 7 to 10, wherein
The container, wherein the hinge slope is parallel to the recess slope.
A container according to any one of claims 7-11, wherein
Assuming that the side wall is a first side wall,
Provided with second to fourth side walls,
The first and second side walls face each other,
The third and fourth side walls are provided opposite to each other and between the first and second side walls,
The first to fourth side walls are configured to be rotatable with respect to the bottom member.
A container,
First and second side walls, and first and second upper walls,
The first and second side walls face each other,
The first and second upper walls are configured to be rotatable relative to the first and second side walls, respectively
A container configured to exert a force on the first upper wall such that the first upper wall approaches the second upper wall when the first upper wall is pressed from above.
14. A container according to claim 13, wherein
The container, wherein the first upper wall has a first inclined surface which becomes lower toward the tip of the first upper wall.
A container according to claim 14, wherein
The first and second upper walls have overlapping portions overlapping each other,
The first inclined surface is provided at the overlapping portion,
The second upper wall has a second inclined surface which rises toward the tip of the second upper wall at the overlapping portion,
The first and second inclined surfaces face each other such that the first inclined surface is located above the second inclined surface.
A container according to claim 14 or 15, wherein
The container in which the inclination angle of the first inclined surface is 1 to 45 degrees with respect to the upper surface of the first upper wall.
A container according to any one of claims 13-16, wherein
And third and fourth side walls and a bottom member,
The third and fourth side walls are provided opposite to each other and between the first and second side walls,
The first to fourth side walls are configured to be rotatable with respect to the bottom member.
A foldable container comprising a bottom wall and a side wall, wherein the side wall is upturned and connected to the bottom wall,
Each of the bottom wall and the side wall includes an inner surface wall forming the inner surface of the container, an outer surface wall forming the outer surface of the container, and an abutment wall forming an abutment surface abutting the bottom wall or the sidewall.
A folding container, wherein the thermal conductivity of at least a portion of the abutment wall is configured to be lower than the thermal conductivity of the outer wall.
19. The collapsible container of claim 18, wherein the expansion ratio of at least a portion of the abutment wall is configured to be higher than the expansion ratio of the outer wall.
20. The folding container according to claim 19, wherein the contact wall is configured such that the expansion ratio of the portion corresponding to the region of 60% or more of the contact surface is higher than the expansion ratio of the outer wall.
The foldable container according to any one of claims 18 to 20, wherein the at least a portion of the abutment wall and the inner wall are integrally formed on each of the bottom wall and the side wall.
22. The collapsible container according to any one of claims 18 to 21, wherein the at least one portion of the abutment wall and the inner wall are formed by a foam molding.
The folding container according to any of claims 18 to 22, wherein the outer wall is formed by a non-foamed molded body.
24. A fold according to any of the claims 18-23, wherein the abutment surfaces of the abutment walls each have a step and are adapted to mate with the abutment surfaces of the other abutment walls in abutment. container.
25. The apparatus according to any one of claims 18 to 24, wherein the side wall is configured to rotate around a rotation axis inside the container with respect to the center of the inner surface wall and the outer surface wall to stand upright against the bottom wall. Folding container as described in.
26. The at least one of the bottom wall and the side wall includes a heat insulating material between the inner surface wall and the outer surface wall, and at least a portion of the abutment wall is constituted by the heat insulating material. The folding container in any one.