JP2022114081A - container - Google Patents

Abstract

An object of the present invention is to provide a container in which a door member can be smoothly rotated and displaced while ensuring the strength of a connecting portion with a hinge member.
A box pallet (1) as a container has a long side wall (11) including a side wall body (12) having an opening (13) and a door member (14) for opening and closing the opening (13). is connected via a hinge member 51 to the lower edge of the opening 13 so that it can be rotatably displaced. Each of the side wall body 12 and the door member 14 includes inner surface forming portions 15 and 17 that form the inner surface side of the long side wall portion 11, an outer surface forming portion 16 that forms the outer surface side of the long side wall portion 11, 18 are welded together. The side wall body 12 and the door member 14 are provided with a side wall body side hinge member support portion 62 connected to the hinge member 51 and a door side hinge member support portion 66, and the side wall body side hinge member support portion 62 and the door member support portion 66 are provided. The door-side hinge member support portion 66 is composed of the outer surface forming portions 16 and 18, respectively.
[Selection drawing] Fig. 20

Description

TECHNICAL FIELD The present invention relates to a container used for transporting articles and the like.

Conventionally, a bottom wall-constituting portion having a substantially rectangular shape in plan view and a side wall portion extending upward from each side portion of the bottom wall-constituting portion are provided, and each side wall portion is formed separately from the bottom wall-constituting portion. A container is known which is constructed by assembling a side wall portion to a bottom wall forming portion. There is also a technique of forming the side wall by welding (heat welding, vibration welding, ultrasonic welding, etc.) an inner surface forming part and an outer surface forming part. With this technology, it is possible to secure sufficient strength to the side wall even when the side wall is configured to be relatively large. Furthermore, a groove portion is provided at a joining portion (welding portion) between the inner surface forming portion and the outer surface forming portion, and surplus resin (welding burr) generated by welding the inner surface forming portion and the outer surface forming portion is removed from the groove portion. There is a technique of storing the side wall inside so that it does not become a hindrance when assembling the side wall with the bottom wall forming part or the like (see, for example, Patent Document 1, etc.).

JP 2018-162085 A

In addition, in order to make it easier to put in and take out items stored in the folding container, openings are provided in the main body of the predetermined side wall (hereinafter referred to as "side wall main body"), and a hinge member is attached to the side wall main body. There is a technique of installing a door member that is rotatably connected through the opening and opens and closes the opening. Furthermore, when the side wall is formed by welding the inner surface forming portion and the outer surface forming portion, the door member may also be formed by welding the inner surface forming portion and the outer surface forming portion. is desirable.

Here, it is required that welding burrs and the like generated by welding the inner surface forming part and the outer surface forming part not hinder the rotational displacement of the door member. On the other hand, as in Patent Document 1, it is conceivable to provide a groove portion at the connection portion of the door member and the side wall main body with the hinge member as a countermeasure against welding burrs. There is a concern that it may be difficult to provide the groove portion itself, or that the strength of the connection portion may be reduced due to the provision of the groove portion in the connection portion.

SUMMARY OF THE INVENTION The present invention has been made to solve the problems exemplified above. It is to provide a container that can

Hereinafter, each means suitable for solving the above object will be described separately. It should be noted that actions and effects specific to the corresponding means will be added as necessary.

Means 1. a bottom wall forming portion having a substantially rectangular shape in a plan view;
A container comprising a side wall portion extending upward from each side portion of the bottom wall forming portion,
At least one of the side wall portions has a side wall main body provided with an opening extending through the side wall portion in a thickness direction, an open state in which the opening is opened, and a closed state in which the opening is closed. and a variable door member;
The door member is rotatably displaceably connected to the peripheral portion of the opening of the side wall body through a separate hinge member, and is rotatably displaced outwardly of the container from the closed state. The open state configuration,
Each of the side wall main body and the door member has a synthetic resin inner surface forming portion forming the inner surface side of the side wall portion and a synthetic resin outer surface forming portion forming the outer surface side of the side wall portion. Constructed by welding,
The side wall body includes a side wall body side hinge member supporting portion connected to the hinge member and supporting the hinge member so as to be relatively rotatably displaceable,
The door member includes a door-side hinge member supporting portion connected to the hinge member so as to be relatively rotatable,
A container, wherein the side wall main body side hinge member supporting portion and the door side hinge member supporting portion are each formed of one of the inner surface forming portion and the outer surface forming portion.

According to Means 1, the side wall main body side hinge member supporting portion and the door side hinge member supporting portion are each configured by one (only) of the inner surface forming portion and the outer surface forming portion. For this reason, for example, the side wall main body side hinge member supporting portion and the door side hinge member supporting portion are formed by welding the inner surface forming portion and the outer surface forming portion, respectively. It is possible to avoid the occurrence of surplus resin (welding burrs), steps, and the like due to welding in the door-side hinge member supporting portion. Therefore, in a state in which the side wall main body side hinge member support section, the door side hinge member support section, and the hinge member are connected, the side wall main body side hinge member support section, the door side hinge member support section, and the hinge member are connected. , and thus the relative rotational displacement of the door member can be made relatively smooth. As a result, the opening and closing operability of the door member can be improved while suppressing the production of defective products.

Further, for example, in the side wall body side hinge member support portion and the door side hinge member support portion, there is no need to form a groove portion for accommodating a welding burr or the like. It is possible to avoid a situation in which the strength of the side wall main body side hinge member support portion and the door side hinge member support portion is lowered due to the provision of the groove portion in the side hinge member support portion. Furthermore, compared to the case where the side wall main body side hinge member supporting portion and the door side hinge member supporting portion are respectively formed by welding the inner surface forming portion and the outer surface forming portion, the side wall main body side hinge member supporting portion and the The accuracy of the shape of the door-side hinge member supporting portion can be improved, and the dimensions of the hinge member, the side wall main body-side hinge member supporting portion, and the door-side hinge member supporting portion are set more severely to suppress rattling, etc. be able to. Therefore, it is possible to improve the durability of the hinge member, the side wall main body side hinge member support portion, and the door side hinge member support portion, and to make the rotational displacement of the door member smoother.

Means 2. The side wall body includes a side wall body side connecting portion projecting from the peripheral edge portion of the opening to the inner peripheral side of the opening,
The side wall main body side connecting portion is provided in the outer surface forming portion of the side wall main body,
The side wall main body side hinge member supporting portion is provided in the side wall main body side connecting portion,
The door member includes a cover portion that covers the side wall main body side connecting portion from the inside of the container when the door member is in the closed state,
The cover portion is configured by at least the inner surface forming portion of the inner surface forming portion and the outer surface forming portion of the door member,
The container according to means 1, wherein the inner side of the container in the cover portion is constituted by the inner surface forming portion.

According to the means 2, when the door member is in the closed state, the side wall main body side connecting portion is covered with the cover portion from the inner side of the container, so that the articles contained in the container are prevented from contacting the side wall main body side connecting portion. It is possible to prevent the situation of being damaged by being caught or the like.

Further, when the door member is in the closed state, the cover portion and the side wall main body side connecting portion overlap each other in the inside-outside direction of the container. Therefore, when a load from the inside of the container or a load from the outside of the container is applied to the cover portion and the side wall main body side connection portion, it is possible to adopt a configuration in which they support each other. Deformation or the like of the cover portion, the side wall main body side connecting portion, etc. can be suppressed.

Furthermore, since the inside of the container in the cover portion is configured by the inner surface forming portion, welding burrs are generated on the surface of the cover portion on the inside side of the container, and the articles contained in the container are affected by the welding burrs. It is possible to prevent a situation such as being caught in a rig and being damaged.

Means 3. In the peripheral edge portion of the opening of the side wall main body, the connection corresponding peripheral edge portion corresponding to the side wall main body side connecting portion has an outer peripheral side of the opening at the welded portion between the inner surface forming portion and the outer surface forming portion. A recessed groove is provided in the
At least part of the cover portion is configured by the inner surface forming portion and the outer surface forming portion of the door member,
When the door member is in the closed state, the cover portion is positioned on the inner peripheral side of the opening with respect to the groove portion provided in the connection-corresponding peripheral portion and in the inner and outer peripheral directions of the opening. facing the groove at
The container according to means 2, wherein the inner surface of the side wall main body and the inner surface of the door member in the closed state are substantially flush with each other.

According to the means 3, the welding burrs generated at the welded portion between the outer surface constituting portion and the inner surface forming portion of the connecting corresponding peripheral portion corresponding to the side wall main body side connecting portion of the peripheral portion of the opening of the side wall main body are housed in the groove. (Positioned on the outer peripheral side of the opening rather than the peripheral edge of the opening). Therefore, it is possible to avoid a situation in which the welding burr on the peripheral edge of the opening hinders the pivotal movement of the door member. As a result, the effect of making the rotational displacement of the door member smoother can be achieved more reliably.

Further, by configuring at least a part of the cover portion with the inner surface forming portion and the outer surface forming portion, it is possible to increase the strength of the cover portion and improve the durability. Furthermore, since the deformation of the cover portion is suppressed, the cover portion is deformed by the pressure from the articles housed in the container, and consequently, the hinge member, the side wall main body side hinge member support portion, and the door side hinge member support portion are deformed. It is possible to prevent a situation in which the connection state with the part is adversely affected.

Further, by closing the door member, the groove portion of the connection corresponding peripheral portion of the side wall main body is covered with the cover portion from the inner peripheral side of the opening. For this reason, it is possible to prevent a situation in which an article housed in the container is caught in the groove of the connection-corresponding peripheral portion of the side wall body and is damaged. Furthermore, since the inner surface of the side wall main body and the inner surface of the door member in the closed state are substantially flush with each other, for example, a step is formed between the inner surface of the side wall main body and the inner surface of the door member in the closed state. Therefore, it is possible to prevent a situation in which an article housed in the container is caught on the step and is damaged.

It should be noted that "the groove portion is the tip portion of an inner protrusion that protrudes outward from the container from a position on the outer peripheral side of the opening relative to the peripheral edge portion of the opening in the inner surface forming portion of the side wall main body. and a tip of an outer protrusion protruding inwardly of the container from a position on the outer peripheral side of the opening of the outer surface forming portion of the side wall main body relative to the peripheral edge of the opening. be established. In this case, since the welding process in the groove portion can be performed only at the tips of the inner protrusion and the outer protrusion, for example, compared to the case of performing the welding process on flat surfaces that are relatively wide, the welding workability can be improved. planned.

Means 4. The door member is rotatably connected via the hinge member to the peripheral edge portion of the opening of the side wall body with the width direction of the side wall portion with the door serving as an axial direction,
The door member is positioned so as to protrude toward the outer circumference of the opening when the door member is in the closed state from the center portion in the width direction of the door member among the side portions provided with the door-side hinge member support portion. Equipped with a convex part,
The side wall main body is inserted into the positioning convex portion of the door member in the closed state at the central portion in the lateral width direction of the side wall main body, and is opened to the inner peripheral side of the opening, extending in the thickness direction of the side wall main body. Equipped with a positioning recess that penetrates,
Means characterized in that the positioning protrusion and the positioning recess are provided at positions between the plurality of hinge members provided at predetermined distances from each other in the lateral width direction of the side wall with door. 4. The container according to any one of 1 to 3.

According to means 4, the positioning protrusion is provided at the center in the width direction of the door member as a resin molded product. In comparison, the dimensional error (deviation from the designed position) in the width direction of the door member can be made relatively small. The positioning recess is also provided in the center portion of the side wall main body in the width direction, so that the dimensional error in the width direction of the side wall main body can be made relatively small.

Side wall main body side hinge member support portions, door side hinge member support portions, etc., are also provided at a plurality of locations corresponding to the plurality of hinge members provided at a predetermined distance from each other in the width direction of the side wall portion with the door. In consideration of the clearance between the width of the door member and the width of the opening of the side wall body, in order to smoothly accommodate the door member in the opening of the side wall body when the door member is closed, It is conceivable to set the clearance according to the amount of clearance for the hinge member supporting portion, the door side hinge member supporting portion, and the like. However, when the door member is relatively large, a not-so-small gap is formed between both side portions of the door member in the closed state and the side edge portions of the opening of the side wall body. Regarding the inner surface side of the container, there is a concern that an article contained in the container may be caught in the gap.

On the other hand, a positioning protrusion and a positioning recess are provided at the center of the lateral width direction of the side wall with the door, which is the position where the dimensional error in the lateral direction is small, and when closing the door member from the open state, By configuring the positioning protrusion to be inserted into the positioning recess, positioning between the door member and the side wall main body in the width direction of the side wall with door can be performed more accurately by the positioning protrusion and the positioning recess. It can be carried out. Therefore, the clearance between the width of the door member and the width of the opening of the side wall body can be set according to the clearance amounts of the positioning protrusion and the positioning recess. As a result, the gap between both sides of the door member in the closed state and the side edges of the opening of the side wall body can be minimized, and the article is more suitable for the container with the door member in the closed state. can be accommodated in

Moreover, when the door member is in the closed state, the positioning protrusion and the positioning recess are positioned between the plurality of hinge members, and are out of alignment with the hinge members in the lateral width direction of the side wall portion with the door. For this reason, for example, compared to the case where the positioning protrusion and the positioning recess and the hinge member are arranged side by side in the inner and outer directions of the container (provided at the same position in the width direction of the side wall portion with the door), the side wall portion with the door thickness can be reduced. In particular, since the side wall portion with the door (the side wall body and the door member) is configured by welding the inner surface forming portion and the outer surface forming portion to each other, the door having the same degree of strength without welding treatment can be used. The thickness of the side wall portion can be made thinner than that of the attached side wall portion. Therefore, it is possible to increase the storage capacity for a given outer dimension of the container.

Furthermore, by providing the positioning recess so as to pass through the side wall body in the thickness direction, the positioning protrusion is less likely to be caught during the insertion operation into the positioning recess during the opening and closing operation of the door member, and in the inserted state. The amount of engagement between the positioning protrusion and the positioning recess (the area of the side wall with the door facing each other in the width direction) can be made relatively large, and the positioning accuracy can be improved.

It should be noted that the positioning protrusion may be configured by one of the inner surface forming portion and the outer surface forming portion. Further, "the positioning recess may be formed by one of the inner surface forming portion and the outer surface forming portion". In this case, the positioning convex portion and the positioning concave portion can more effectively position the door member and the side wall main body more accurately in the width direction of the side wall portion with the door. . Further, corresponding to the means 2, the side wall main body side connecting portion may be provided with a positioning concave portion. In this case, the positioning recess is formed by the outer surface forming portion.

Means 5. All of the side wall portions have an upright posture in which they stand above the side portions of the bottom wall-constituting portion corresponding to each side portion of the bottom wall-constituting portion, and a central portion of the bottom wall-constituting portion. It is configured so that the posture can be changed between the lying posture lying on the side,
A container capable of changing its state between an assembled state in which all of the side walls are in the upright posture and a folded state in which all of the side walls are in the lying posture,
The side wall portion with a door is configured to be able to be drawn upward from the bottom wall forming portion at least in the standing posture,
a regulating means for regulating upward relative displacement of the door member with respect to the side wall main body when the door member is in the closed state and the side wall portion with the door is in the standing posture; The container according to any one of means 1 to 4, characterized by:

According to the means 5, since the restricting means is provided, when the side wall portion with the door is pulled upward from the bottom wall constituting portion in order to remove the side wall portion with the door in the upright posture, the hinge member and the side wall main body side hinge member The side wall portion with the door can be lifted upward by gripping the door member while reducing the load on the support portion and the door-side hinge member support portion. Therefore, the hinge member and the side wall are improved in convenience when pulling out the side wall portion with the door upward from the bottom wall-constituting portion, and securing freedom in design such as the arrangement and size of the door member. It is possible to improve the durability of the main body side hinge member supporting portion and the door side hinge member supporting portion.

Means 6. The opening is provided so as to leave the side wall main body below the opening and on both sides of the opening when the side wall with the door is in the standing posture,
The door member is rotatably connected to the lower edge of the opening of the side wall body via the hinge member,
On both sides of the door member or on both sides of the opening of the side wall main body, lock positions for restricting rotational displacement of the door member in the closed state and the door member in the closed state are provided. a pair of lock members displaceable between a lock release position that allows rotational displacement of the
a side wall main body-side reinforcing member mounting space in which a reinforcing member extending in a substantially horizontal direction can be mounted between the inner surface forming portion and the outer surface forming portion of the side wall main body and the door member, respectively; , The door member side reinforcing member mounting space is provided,
The side wall main body side reinforcing member mounting space extends laterally beyond both side edges of the opening in the width direction of the side wall with door along the lower edge of the opening,
The door member-side reinforcing member mounting space is arranged between the pair of lock members,
In the side wall main body side reinforcing member mounting space and the door member side reinforcing member mounting space, the side wall main body side reinforcing member mounting space and the above-mentioned 6. The container according to any one of means 1 to 5, wherein a recessed space groove is provided on the outer side of the door member side reinforcing member installation space.

According to the means 6, the side wall main body of the side wall portion with the door and the door member are each reinforced by the reinforcing member, and deformation and the like can be suppressed. In other words, it is possible to avoid a situation in which it is difficult to close the door member or bring the lock member to the locked position due to the deformation of the door member. Furthermore, it is possible to avoid a situation in which the side wall main body side hinge member supporting portion is displaced and deformed due to the deformation of the lower edge of the opening of the side wall main body, making it difficult to rotate and displace the door member. can.

In addition, in the side wall main body side reinforcing member mounting space and the door member side reinforcing member mounting space, welding burrs generated at the welding portions between the inner surface forming portion and the outer surface forming portion can be accommodated in the space grooves. As a result, if the posture of the reinforcing member is tilted due to the welding burr, or if the welding burr breaks due to contact with the reinforcing member and displaces the side wall main body or the door member, the broken welding burr will cause the side wall main body or the door member to displace. It is possible to prevent the occurrence of abnormal noise due to rolling inside.

FIG. 4 is a perspective view of the box pallet in an assembled state with door members closed; FIG. 4 is a perspective view of the box pallet in an assembled state with one door member opened. 1 is a perspective view of a box pallet in a folded state; FIG. FIG. 11 is a perspective view showing a process of changing the state of the box pallet; FIG. 11 is a perspective view showing a process of changing the state of the box pallet; It is a perspective view which shows the outer surface side of a long-side side wall part. It is a perspective view which shows the inner surface side of a long-side side wall part. It is a perspective view which shows the inner surface side of the long-side side wall part which made the door member into the open state. FIG. 9 is a partially enlarged perspective view of FIG. 8; It is a perspective view which shows the outer surface side of a side wall main body. It is a perspective view which shows the inner surface side of a side wall main body. It is a partial expansion perspective view including a partial cross section which shows the peripheral part of a side wall main body side connection part. It is a partial expansion perspective view which shows the upper one side part side (periphery part of a control structure part) of a side wall main body. It is a perspective view which shows the outer surface side of a door member. It is a perspective view which shows the inner surface side of a door member. It is a partial expansion perspective view including a partial cross section which shows the peripheral part of a door side hinge member support part. FIG. 4 is a partially enlarged perspective view showing one side of the upper portion of the door member (the door lock member and the periphery of the notch); Fig. 10 is a perspective view of a hinge member; Fig. 10 is a perspective view of a hinge member; It is a partially enlarged perspective view including a partial cross section showing a connecting portion between a side wall body and a door member via a hinge member. It is a partial enlarged sectional view showing a connection part of a side wall main part and a door member via a hinge member. It is a partially enlarged perspective view including a partial cross section showing a connecting portion between a side wall body and a door member, with illustration of a hinge member omitted. It is a front view of the outer surface side of a long side wall part. It is a partially enlarged cross-sectional view of a side wall body. It is a partial expanded sectional view of a door member.

An embodiment will be described below with reference to the drawings. As shown in FIGS. 1, 4, 5, etc., a box pallet 1 as a container includes a bottom wall portion 3 having a substantially rectangular shape in a plan view, and long sides protruding upward from each long side portion of the bottom wall portion 3. A bottom wall forming part 2 comprising side base parts 4 and short side base parts 5 protruding upward from each short side part of the bottom wall part 3 between the pair of long side base parts 4. I have. The bottom wall portion 3 of the present embodiment has a pallet shape, and connects a plurality of strut portions 6 , an upper deck portion 7 that connects the upper end portions of the strut portions 6 , and the lower end portions of the strut portions 6 . A lower deck portion 8 is provided, and a fork insertion portion 9 into which a fork of a forklift can be inserted is formed between the support portions 6 . In this embodiment, the pallet has a four-way insertion type into which forks can be inserted from four side surfaces constituting the outer peripheral surface of the bottom wall portion 3 . The bottom wall forming portion 2 is made of polypropylene.

In addition, the box pallet 1 has long side wall portions 11 detachably attached to the long side base portions 4 and rotatable to the short side base portions 5. and a short side wall portion 31 . As shown in FIGS. 1 and 3, the long side wall portion 11 and the short side wall portion 31 are erected above the long side base portion 4 and the short side base portion 5, respectively. and a lying posture in which the user is laid down on the central portion side of the bottom wall-constituting portion 2 (above the bottom wall portion 3). Therefore, when the box pallet 1 of the present embodiment stores and transports articles, the assembled state ( 1), and when only the box pallet 1 is to be transported, all the long side wall portions 11 and the short side wall portions 31 are laid down in a folded state (see FIG. 3), It is configured so as to be able to save space. In the present embodiment, each of the short side wall portions 31 is rotated and displaced without being removed from the bottom wall forming portion 2 to change its posture. 4. As shown in FIG. 5, the long side wall portion 11 is once removed from the bottom wall forming portion 2, and after changing the attitude of the long side wall portion 11, it is attached to the bottom wall forming portion 2. there is

Furthermore, as shown in FIG. 4 , the projection length of the long-side base portion 4 from the bottom wall portion 3 is longer than the projection length of the short-side base portion 5 from the bottom wall portion 3 . In addition, the width of the long side wall portion 11 is substantially the same as the length of the long side base portion 4 (longitudinal width of the bottom wall forming portion 2), and the width of the short side wall portion 31 is short. The length of the side base portion 5, that is, the distance between the pair of long side base portions 4 is substantially the same. In addition, in the box pallet 1 of this embodiment, the lateral width of the long side wall portions 11 is 1,000 mm or more.

As shown in FIGS. 1, 2, 6 to 8, each of the long side wall portions 11 includes a side wall main body 12 provided with an opening 13 penetrating through the long side wall portion 11 in the thickness direction. , and a side wall portion with a door provided with a door member 14 capable of changing its state between an open state for opening the opening 13 and a closed state for closing the opening 13 . The opening 13 has a shape that opens above the side wall main body 12 while leaving the side wall main body 12 below the opening 13 and on both sides of the opening 13 when the long-side side wall 11 is in an upright posture. None. Further, as shown in FIGS. 20 to 22 and the like, the side wall body 12 includes a side wall inner surface forming portion 15 made of polypropylene forming the inner surface side of the long side side wall portion 11 and the outer surface side of the long side side wall portion 11. It is configured by welding together the side wall outer surface forming portion 16 made of polypropylene. Further, regarding the door member 14 as well, a polypropylene door inner surface forming portion 17 forming the inner surface side of the long side wall portion 11 and a polypropylene door outer surface forming portion 18 forming the outer surface side of the long side wall portion 11 are provided. are welded together. The details of the configuration for opening and closing the door member 14 will be described later.

As shown in FIGS. 10, 11, etc., the side wall main body 12 includes a long-side base portion 19 having a shape in which the opening portion 13 is formed in a plate-like body having a substantially rectangular shape in a side view, and a long-side base portion Long-side insertion portions 20 protruding downward from the lower sides of the portion 19 , and locking structure portions 21 protruding inwardly of the box pallet 1 from the side portions of the long-side base portion 19 . Three long-side insertion portions 20 are provided at predetermined intervals in the lateral width direction of the side wall main body 12 . Each long-side insertion portion 20 is provided with insertion protrusions 20a that protrude laterally from the lower ends of the left and right side surfaces of the long-side insertion portion 20 . Further, as shown in FIGS. 11 and 12 , the locking structure portion 21 protrudes inwardly of the box pallet 1 from the side portion of the inner surface of the long side base portion 19 , A substantially rectangular plate-shaped locking plate portion 22 extending in the width direction, and a substantially inverted L-shaped locking projection connected to the surface of the side wall main body 12 on the side of the lateral width direction center portion side of the locking plate portion 22 . 23, and a side wall lock engaging portion 24 having a substantially square cylindrical shape that is connected to the surface of the side wall main body 12 on the side of the lateral width direction central portion side of the locking plate portion 22 and opens to the inner side of the box pallet 1. there is

As shown in FIGS. 1 and 5, each of the short-side sidewalls 31 includes a short-side base portion 32 that is substantially rectangular in front view, and a short-side base portion 32 that protrudes downward from the lower side of the short-side base portion 32 . and an insertion portion 33 (see FIG. 5). In this embodiment, three short-side insertion portions 33 are provided at predetermined intervals in the width direction of the short-side sidewall portion 31 . Each short-side insertion portion 33 has a shaft portion (not shown) that protrudes laterally from the lower ends of the left and right side surfaces of the short-side insertion portion 33 .

In addition, as shown in FIG. 5 , in the assembled state of the box pallet 1 , the outer side portions of the short side wall portions 31 are engaged with the locking structure portions 21 of the long side wall portions 11 in substantially abutting contact therewith. A locked component 34 is provided to be stopped. The to-be-engaged constituent portion 34 includes an to-be-engaged plate portion 35 which is thinned so as to omit the thickness of the outer surface side of the short side wall portion 31, and a short plate portion 35 protruding from the outer surface of the to-be-engaged plate portion 35. and an L-shaped locked protrusion 36 .

In the assembled state of the box pallet 1, the outer surface side of the locking component 34 of the short side wall portion 31 substantially abuts the locking component 21 of the long side wall portion 11, whereby the short side wall The outward displacement of the box pallet 1 of the portion 31 is regulated. Also, both side portions of the short-side sidewall portion 31 (side portions of the locked component portion 34) substantially abut against the inner surfaces of the long-side sidewall portion 11, thereby allowing the box pallet 1 of the long-side sidewall portion 11 to is regulated. Further, the locking protrusion 23 of the locking component 21 of the long-side sidewall 11 and the locked projection 36 of the locking component 34 of the short-side sidewall 31 are locked, As a result, the outward displacement of the box pallet 1 of the long side wall portions 11 is restricted.

In addition, side wall locking members for connecting the short side wall portions 31 and the long side wall portions 11 in the assembled state of the box pallet 1 are provided near both side portions of the short side wall portions 31 . 37 is installed. Each side wall lock member 37 is configured to be operable from the outer surface side of the short-side side wall portion 31 and slidable to the left and right. It protrudes into the engaged component 34 . After the long-side side wall portion 11 and the short-side side wall portion 31 are set in an upright posture, the side wall lock member 37 is slid sideways to protrude into the locked constituent portion 34, thereby protruding the side wall lock member 37. The direction leading end portion side is inserted into the side wall lock engaging portion 24 of the engaging structure portion 21 of the long side wall portion 11 and is engaged (locked). As a result, the inward displacement of the short-side sidewalls 31 of the box pallet 1 is restricted, and the upward relative displacement of the long-side sidewalls 11 with respect to the short-side sidewalls 31 is restricted.

In the present embodiment, the short side wall portion 31 also has an inner surface forming portion made of polypropylene that forms the inner surface side of the short side side wall portion 31, and an inner surface forming portion made of polypropylene that forms the outer surface side of the short side side wall portion 31. are welded to each other. In addition, a groove portion (gap) is appropriately provided at the joining portion of the inner surface forming portion and the outer surface forming portion, and surplus resin (welding burr) generated by welding the inner surface forming portion and the outer surface forming portion is generated. etc. are accommodated inside the groove so as not to become a hindrance to various types of assembly.

As shown in FIG. 4 and the like, the long-side base portion 4 of the bottom wall-constituting portion 2 is open upward, and the long-side covering portion 20 into which the long-side insertion portion 20 of the long-side side wall portion 11 can be inserted from above. An insertion portion 41 is provided. The long-side inserted portion 41 allows the insertion protrusion 20a of the long-side inserted portion 20 inserted into the long-side inserted portion 41 to displace inwardly of the bottom wall forming portion 2 (box pallet 1). A long-side insertion portion restricting portion 42 for restricting is provided. The long-side inserted portions 41 are provided at three positions individually corresponding to the three long-side insertion portions 20 provided on the long-side side wall portion 11 . In addition, the long-side inserted portion 41 is also opened to the inner side of the bottom wall forming portion 2 (box pallet 1), and the long-side inserted portion 20 of the long-side side wall portion 11 in the standing posture is Not only can it be inserted, but also the long-side insertion portion 20 (especially the insertion protrusion 20a) of the long-side side wall portion 11 in the lying posture can be inserted. In this embodiment, due to the shape of the insertion protrusion 20a, it is impossible to change the posture of the long side wall portion 11 while the long side insertion portion 20 is being inserted into the long side inserted portion 41. ing.

As shown in FIG. 4 , the short-side base portion 5 is provided with a short-side inserted portion 43 into which the short-side insertion portion 33 of the short-side sidewall portion 31 is inserted. The short-side inserted portions 43 are provided at three locations individually corresponding to the three short-side insertion portions 33 provided on the short-side side wall portion 31 . Each short-side inserted portion 43 includes a short-side bearing portion 44 that pivotally supports the shaft portion of the short-side inserted portion 33 . It has a shape that allows displacement of

In the present embodiment, when the box pallet 1 in the folded state is to be assembled, first, the pair of long side wall portions 11 in the lying posture are removed from the bottom wall forming portion 2 (the long side insertion portions 20 are removed). are pulled upward from the long-side inserted portion 41), the pair of short-side side wall portions 31 are pivotally displaced to the standing posture, and then the pair of long-side side wall portions 11 are set to the standing posture, as shown in FIG. As shown, it is attached to the bottom wall forming part 2, and the side wall lock member 37 is locked. When folding the box pallet 1 in the assembled state, the side wall locking members 37 are unlocked first, and the pair of long side side wall portions in the upright position as shown in FIG. 11 is removed from the bottom wall forming part 2 (pulled out upward), the pair of short side wall parts 31 are rotated to the laying posture, and then the long side wall part 11 is set to the laying posture, and the bottom wall forming part is placed. 2.

As shown in FIGS. 6 to 9 and the like, the door member 14 of the long side wall portion 11 of this embodiment has a separate hinge member 51 for the lower edge portion of the opening 13 of the side wall body 12. It is configured to be pivotally displaceable from the closed state to the outside of the box pallet 1 to be in the open state. In this embodiment, the door member 14 and the side wall main body 12 are connected to each other via four hinge members 51 provided at a predetermined distance from each other in the width direction of the long-side side wall portion 11 . In this embodiment, the lower edge of the opening 13 of the side wall main body 12 corresponds to the connection corresponding peripheral edge portion.

As shown in FIGS. 18, 19, etc., the hinge member 51 includes a hinge body 52 which has a substantially rectangular shape when viewed from the front and a substantially oval shape when viewed from the side, and a hinge body 52 extending from one end in the longitudinal direction of both side surfaces of the hinge body 52. A pair of side wall corresponding shaft portions 53 protruding laterally, and a pair of door corresponding shaft portions 54 protruding laterally from the other longitudinal end portions of both side surfaces of the hinge body 52 are provided. The side wall corresponding shaft portion 53 is configured in a substantially columnar shape, and the tip portion side thereof has a substantially oval cross section. The door-corresponding shaft portion 54 has a substantially C-shaped cross section that opens to one side in the thickness direction of the hinge body 52 . The hinge member 51 is integrally formed of polypropylene.

As shown in FIG. 11 , the side wall body 12 includes a side wall body side connecting portion 61 that protrudes upward (inner peripheral side of the opening 13 ) from the lower edge of the opening 13 . The side wall body connecting portion 61 includes a side wall body side hinge member supporting portion 62 that is connected to the side wall corresponding shaft portion 53 of the hinge member 51 and supports the hinge member 51 so as to be relatively rotatably displaceable. The side wall main body side hinge member support portions 62 are provided at four locations spaced apart from each other by a predetermined distance in the width direction of the long side wall portion 11 so that four hinge members 51 can be attached to each long side wall portion 11 . It is As shown in FIGS. 12 and 20 , each side wall main body side hinge member supporting portion 62 projects upward from the lower edge of the opening 13 and is a pair of vertical hinges facing each other with a distance therebetween in the thickness direction of the side wall main body 12 . A pair of wall portions 63 are provided at a distance slightly longer than the width of the hinge body 52 in the lateral width direction of the side wall main body 12 , and locks protruding from the upper portions of the opposing surfaces of each pair of vertical wall portions 63 . A protrusion 64 is provided. Then, as shown in FIG. 20 , by inserting the side wall corresponding shaft portion 53 of the hinge member 51 to the lower position of the locking projection 64 , the side wall corresponding shaft portion 53 is moved to the side wall main body side hinge member supporting portion 62 . It is supported so as to be rotatably displaceable.

In addition, as shown in FIG. 11 and the like, the boundary between the lower edge of the opening 13 of the side wall body 12 and the side edge of the opening 13 is connected obliquely, and the side wall body side connecting portion 61 is , the obliquely connected boundary portion and the side wall main body side hinge member support portion 62 are connected, and the side wall main body side hinge member support portions 62 are connected to each other. As a result, in the side wall body side connecting portion 61 , each side wall body side hinge member support portion 62 is formed with a recess opening upward and penetrating the side wall body 12 in the thickness direction. Further, as shown in FIGS. 20, 22, etc., the side wall main body side connecting portion 61 of the present embodiment is composed only of the side wall outer surface forming portion 16 of the side wall main body 12. As shown in FIGS.

As shown in FIGS. 14, 16, etc., the door member 14 includes a door-side hinge member support portion 66 that is connected to the hinge member 51 so as to be relatively rotatable and displaceable. The door-side hinge member support portions 66 are also provided at four locations corresponding to the side wall main body-side hinge member support portions 62 and spaced apart from each other by a predetermined distance in the width direction of the long side wall portion 11 . Each door-side hinge member support portion 66 is provided at the lower side portion of the door member 14 in the closed state (the long-side side wall portion 11 is in an upright posture), and opens downward and outward from the box pallet 1. It is composed of a side hinge recess 67 and substantially cylindrical shaft projections 68 protruding from a pair of opposing inner side surfaces of the door side hinge recess 67 . Then, as shown in FIG. 20, by relatively inserting the shaft protrusion 68 of the door-side hinge member support portion 66 inside the door-corresponding shaft portion 54 of the hinge member 51, the door-side hinge member support portion 66 is attached to the door. It is supported so as to be rotatably displaceable with respect to the corresponding shaft portion 54 . Further, as shown in FIGS. 16, 22, etc., the door-side hinge member support portion 66 of the present embodiment is configured only by the door outer surface forming portion 18, and the box pallet 1 of the door-side hinge member support portion 66 is The inner side is covered with the door inner surface forming portion 17 . As shown in FIGS. 9 and 20, the hinge member 51 is basically connected to the side wall main body side hinge member supporting portion 62 of the side wall main body side connecting portion 61 regardless of the state of the door member 14 . and the door side hinge recess 67 of the door member 14. As shown in FIGS. 6 and 20, when the door member 14 is closed, the door The lower side portion of the member 14 and the upper side portion of the side wall main body side connecting portion 61 of the side wall main body 12 face each other vertically and are close to each other.

As shown in FIG. 12 and the like, at the lower edge of the opening 13 of the side wall main body 12 (peripheral edge portion corresponding to connection), the side wall inner surface forming portion 15 and the side wall outer surface forming portion 16 are welded downward (opening portion). 13) is provided with a recessed groove portion 70 . As shown in FIGS. 21 and 22 , the groove portion 70 extends from a position below the lower edge of the opening 13 (on the outer periphery of the opening 13 ) of the side wall inner surface forming portion 15 toward the outer side of the box pallet 1 . and the tip of the inner protrusion 71 protruding toward the inside of the box pallet 1 from a position below the lower edge of the opening 13 (on the outer periphery of the opening 13) of the side wall outer surface forming portion 16. It is provided so as to open to the inner peripheral side of the opening 13 by being welded to the tip of the outer protrusion 72 .

As shown in FIGS. 14, 16, 22, etc., the door member 14 includes a cover portion 73 that covers the side wall main body side connecting portion 61 from the inside of the box pallet 1 when the door member 14 is in the closed state. I have. In this embodiment, when the door member 14 is in the closed state, the cover portion 73 covers the entire side wall main body side connecting portion 61 from the inside of the box pallet 1, and the inside and outside directions of the box pallet 1 are covered. The portion 73 and the side wall main body side connecting portion 61 are arranged to be close to each other. In the cover portion 73, the door inner surface forming portion 17 and the door outer surface forming portion 18 face each other in the thickness direction of the door member 14, and ribs having a short projecting length are provided to connect (weld) the tip portions thereof. (It has a two-layer structure of a door inner surface forming portion 17 and a door outer surface forming portion 18). Further, as shown in FIG. 21 and the like, when the door member 14 is in the closed state, the cover portion 73 is positioned upward (inwardly around the inner circumference of the opening portion 13) with respect to the groove portion 70 provided in the lower edge portion of the opening portion 13. side), and faces and approaches the groove portion 70 in the vertical direction (the inner and outer peripheral directions of the opening portion 13). In addition, in this embodiment, the inner surface of the side wall main body 12 and the inner surface of the door member 14 in the closed state are substantially flush with each other (see FIGS. 7 and 21). Further, the inner surface of the door member 14 is composed only of the door inner surface forming portion 17 . Further, the outer surface of the side wall main body 12 and the outer surface of the door member 14 in the closed state are also substantially flush (see FIG. 6), and the outer surface of the side wall main body 12 and the outer surface of the door member 14 in the open state (this In the state, the inner surface of the box pallet 1) is substantially in contact with the inner surface of the box pallet.

14 and the like, when the door member 14 is in the closed state from the center portion in the width direction of the door member 14 in the lower side portion where the door-side hinge member support portion 66 is provided, the door member 14 is closed. A positioning protrusion 75 protruding downward (on the outer peripheral side of the opening 13) is provided on the inner side. On the other hand, as shown in FIGS. 8, 10, etc., the side wall body 12 has an upward opening at the central portion of the side wall body side connecting portion 61 in the width direction of the side wall body side connecting portion 61. It has a positioning recess 76 penetrating in the thickness direction. Then, as shown in FIG. 6 , by closing the door member 14 , the positioning projections 75 of the door member 14 are inserted into the positioning recesses 76 of the side wall main body 12 . As described above, in this embodiment, the four hinge members 51 are provided at predetermined distances from each other in the lateral width direction of the long side wall portion 11, and the positioning protrusions 75 and the positioning recesses 76 It is provided at a position between a plurality of hinge members 51 so that two hinge members 51 are arranged on each side. Further, the positioning protrusion 75 is composed only of the door outer surface forming part 18 , and the positioning recess 76 is composed only of the side wall outer surface forming part 16 .

As shown in FIGS. 10 and 13 , the side wall main body 12 is provided with regulating constituent portions 78 projecting from both side edges of the opening 13 toward the inner peripheral side of the opening 13 . The regulation structure portion 78 includes a substantially rectangular plate-shaped regulation plate portion 79 that protrudes from the edge portion of the side edge portion of the opening 13 on the inner surface side of the side wall body 12 and extends in the height direction of the side wall body 12 , and a regulation plate portion 79 that extends in the height direction of the side wall body 12 . A substantially L-shaped restricting projection 80 connected to the outer surface of the plate portion 79 is provided. Further, locking recesses 81 recessed toward the outer periphery of the opening 13 are provided on both side edges of the opening 13 of the side wall body 12 .

As shown in FIG. 15, on both side portions of the inner surface of the door member 14, when the door member 14 is in the closed state, regulated constituent portions 83 are provided which contact and are locked by the regulating constituent portions 78 of the side wall main body 12. It is The regulated constituent portion 83 includes a regulated plate portion 84 which is thinned by omitting the wall thickness of the inner surface of the door member 14 and a substantially inverted L-shaped plate projecting from the inner surface of the regulated plate portion 84 . and a restricting protrusion 85 .

In the closed state of the door member 14, the inner surface side of the regulated component 83 of the door member 14 substantially abuts the regulating component 78 of the side wall main body 12, thereby causing the door member 14 to move toward the inside of the box pallet 1. Displacement to the side is restricted. Further, both side portions of the door member 14 (side portions of the regulated component 83) substantially abut on the side edges of the opening 13 of the side wall body 12, and the regulating projections 80 of the regulating component 78 of the side wall body 12 are in contact with each other. As a result, the regulated protrusion 85 of the regulated component 83 of the door member 14 is locked, thereby restricting the lateral displacement of the long-side side wall 11 of the door member 14 .

Further, as shown in FIGS. 14 and 17, in the vicinity of both sides of the door member 14, there are a lock position for restricting the rotational displacement of the door member 14 in the closed state, and a box for the door member 14 in the closed state. A pair of door lock members 86 are mounted to be displaced between a lock release position that allows the pallet 1 to rotate outwardly. Each door lock member 86 is configured to be operable from the outer surface side of the door member 14 and slidable to the left and right. is adapted to be in a locked position protruding from the side of the By closing the door member 14 and then moving the door lock member 86 to the lock position, the tip side of the door lock member 86 in the projecting direction is inserted into the lock recess 81 of the side wall body 12 and locked (locked). state). Thereby, the outward displacement of the box pallet 1 of the door member 14 is restricted. When the door member 14 in the closed state is to be opened, the door lock member 86 in the locked position is displaced toward the central portion of the door member 14 in the lateral width direction, and the door lock member 86 as a whole moves toward the door member 14 . , the door member 14 is pivotally displaced outward.

In addition, as shown in FIGS. 14, 17, etc., notches 87 penetrating in the thickness direction of the door member 14 and opening to the sides of the door member 14 are formed in the upper end portions of both sides of the door member 14. is provided. The lower edge of the notch 87 extends substantially horizontally (see FIG. 23). Further, as shown in FIGS. 15 and 17 , the peripheral portion of the notch portion 87 is composed of the door inner surface forming portion 17 and the door outer surface forming portion 18 .

On the other hand, as shown in FIGS. 6, 10, 13, etc., door members 14 are closed at the upper ends of both side edges (restriction structure portions 78) of the opening 13 of the side wall body 12. In this case, a restriction portion 88 is provided that is relatively inserted into the notch portion 87 of the door member 14 . The lower surface of the restricting portion 88 extends substantially horizontally. When the box pallet 1 is in the assembled state (the long side wall portion 11 is in the upright position) and the door member 14 is closed, the lower edge of the notch 87 of the door member 14 is aligned with the side wall main body 12. It faces the lower surface of the restriction part 88 up and down, contacts, or approaches. In particular, when an upward force is applied to the door member 14 in such a state, the lower edge of the notch 87 of the door member 14 abuts the lower surface of the restricting portion 88 of the side wall body 12, The upward relative displacement of the door member 14 with respect to the side wall main body 12 is restricted. In the present embodiment, the notch 87 (periphery thereof) of the door member 14 and the restricting portion 88 constitute restricting means.

As shown in FIGS. 23 and 24, the side wall main body 12 can be equipped with a side wall reinforcing member 90 extending substantially horizontally between the side wall inner surface forming portion 15 and the side wall outer surface forming portion 16. A side reinforcing member mounting space 91 is provided. The side wall main body side reinforcing member mounting space 91 extends along the lower edge of the opening 13 (in the height direction of the long side wall 11, the lower edge of the opening 13 is wider than the lower side of the long side wall 11). ), and extends further laterally than both side edges of the opening 13 in the lateral width direction of the long side wall 11 . The side wall reinforcing member 90 mounted in the side wall main body side reinforcing member mounting space 91 extends from a range where the opening 13 is not formed above one side of the side wall main body 12 to above the other side of the side wall main body 12 . It extends to a range where the opening 13 is not formed.

Further, as shown in FIGS. 23 and 25, the door member 14 can be fitted with a door reinforcing member 92 extending substantially horizontally between the door inner surface forming portion 17 and the door outer surface forming portion 18. A door member side reinforcing member mounting space 93 is provided. The door member-side reinforcing member mounting space 93 is arranged between the pair of door lock members 86 . The door reinforcing member 92 mounted in the door member side reinforcing member mounting space 93 extends from the vicinity of one door lock member 86 to the vicinity of the other door lock member 86 . In addition, the side wall reinforcing member 90 and the door reinforcing member 92 of this embodiment are configured by iron square pipes.

Further, as shown in FIGS. 24 and 25, in the side wall main body side reinforcing member mounting space 91 and the door member side reinforcing member mounting space 93, the side wall inner surface forming portion 15, the door inner surface forming portion 17, and the side wall outer surface In the welded portions (where the ribs are welded together) with the constituent portion 16 and the door outer surface constituent portion 18, there are outer sides of the side wall main body side reinforcing member mounting space 91 and the door member side reinforcing member mounting space 93. A space groove portion 94 is provided which is recessed into the groove. That is, the side wall inner surface forming portion 15 and the door inner surface forming portion 17 are provided at the upper edge portion and the lower edge portion of the side wall main body side reinforcing member mounting space 91 and the door member side reinforcing member mounting space 93, respectively. , the side wall outer surface forming portion 16, and the door outer surface forming portion 18, but by providing the space groove portion 94, the welded portion can be replaced by the side wall main body side reinforcing member mounting space 91 and the door outer surface forming portion 18. The side wall body side is closer to the upper edge and lower edge of each member-side reinforcing member mounting space 93 (the general surface defining the side wall main body-side reinforcing member mounting space 91 and the door member-side reinforcing member mounting space 93). It is positioned outside the reinforcement member installation space 91 and the door member side reinforcement member installation space 93 .

As described in detail above, according to the present embodiment, the side wall body 12 of the long side wall portion 11 is formed by welding the side wall inner surface forming portion 15 and the side wall outer surface forming portion 16 together. The side wall main body side hinge member supporting portion 62 connected to the hinge member 51 is composed only of the side wall outer surface forming portion 16 . Further, the door-side hinge member supporting portion 66 is configured by welding the door inner surface forming portion 17 and the door outer surface forming portion 18 together. is composed only of the door outer surface forming part 18 . Therefore, for example, the side wall main body side hinge member support portion 62 and the door side hinge member support portion 66 are configured by welding the inner surface forming portions 15 and 17 and the outer surface forming portions 16 and 18, respectively. In addition, it is possible to avoid the occurrence of surplus resin (welding burrs) and steps due to welding in the side wall main body side hinge member supporting portion 62 and the door side hinge member supporting portion 66 . Therefore, when the side wall main body side hinge member support portion 62 and the door side hinge member support portion 66 are connected to the hinge member 51, the side wall main body side hinge member support portion 62 and the door side hinge member support portion 66 are connected to each other. , and the hinge member 51, and thus the relative rotational displacement of the door member 14 can be relatively smooth. As a result, the opening and closing operability of the door member 14 can be improved while suppressing the production of defective products.

Further, for example, in the side wall main body side hinge member support portion 62 and the door side hinge member support portion 66, there is no need to form a groove portion for accommodating a welding burr or the like. Also, to avoid a situation in which the strength of the side wall main body side hinge member support portion 62 and the door side hinge member support portion 66 is lowered due to the provision of the groove portion in the door side hinge member support portion 66. can be done. Furthermore, compared to the case where the side wall main body side hinge member supporting portion 62 and the door side hinge member supporting portion 66 are formed by welding the inner surface forming portions 15 and 17 and the outer surface forming portions 16 and 18 respectively, the side wall main body The shape accuracy of the side hinge member support portion 62 and the door side hinge member support portion 66 can be improved, and the hinge member 51, the side wall main body side hinge member support portion 62, and the door side hinge member support portion 66 By setting the dimensions more severely, rattling or the like can be suppressed. Therefore, it is possible to improve the durability of the hinge member 51, the side wall main body side hinge member support portion 62, and the door side hinge member support portion 66, and to make the rotational displacement of the door member 14 smoother. can.

In addition, at the lower edge of the opening 13 of the side wall body 12 provided with the side wall main body side connecting portion 61, at the welded portion between the side wall inner surface forming portion 15 and the side wall outer surface forming portion 16, the outer peripheral side of the opening 13 A groove portion 70 recessed (downwardly) is provided. Therefore, welding burrs generated at the welding portion can be contained in the groove portion 70 (located below the lower edge portion of the opening 13). Therefore, it is possible to avoid a situation in which the welding burr on the lower edge of the opening 13 impedes the pivotal movement of the door member 14 . As a result, the effect of making the rotational displacement of the door member 14 smoother can be achieved more reliably. In addition, since the welding process in the groove part 70 can be performed only at the tip parts of the inner projection part 71 and the outer projection part 72, for example, the welding workability is improved compared to the case of performing the welding process on flat surfaces that are relatively wide. improvement, etc.

Further, the door member 14 is provided with a covering portion 73 that covers the side wall main body side connecting portion 61 from the inside of the box pallet 1 when the door member 14 is in the closed state. Therefore, it is possible to prevent a situation in which articles stored in the box pallet 1 with the door member 14 in the closed state are caught in the side wall body side connecting portion 61 and damaged. Further, when the door member 14 is in the closed state, the cover portion 73 and the side wall body side connection portion 61 overlap (approach each other) in the inside and outside directions of the box pallet 1 . Therefore, when a load from the inside of the box pallet 1 or a load from the outside of the box pallet 1 is applied to the covering portion 73 and the side wall main body side connecting portion 61, they can support each other. It is possible to suppress deformation of the cover portion 73, the side wall main body side connecting portion 61, and the like. Furthermore, since the inner side of the box pallet 1 in the cover portion 73 is constituted by the door inner surface forming portion 17, welding burrs are generated on the inner side surface of the box pallet 1 in the cover portion 73, and the box pallet 1 can be prevented from being damaged by being caught by the welding burrs.

In addition, the cover portion 73 has a two-layer structure in which the door inner surface forming portion 17 and the door outer surface forming portion 18 are connected to each other. Therefore, the strength of the cover portion 73 can be increased, and durability can be improved. Furthermore, since the deformation of the cover portion 73 is suppressed, the cover portion 73 is deformed by the pressure from the articles accommodated in the box pallet 1, and the hinge member 51, the side wall body side hinge member support portion 62, and the , the connection state with the door-side hinge member support portion 66 can be prevented from being adversely affected.

Further, by closing the door member 14 , the groove 70 at the lower edge of the opening 13 of the side wall body 12 is covered with the cover 73 from the inner peripheral side of the opening 13 . Therefore, it is possible to prevent a situation in which articles stored in the box pallet 1 are caught in the groove 70 at the lower edge of the opening 13 of the side wall body 12 and damaged. Further, since the inner surface of the side wall main body 12 and the inner surface of the door member 14 in the closed state are substantially flush with each other, for example, the inner surface of the side wall main body 12 and the inner surface of the door member 14 in the closed state It is possible to prevent a situation in which a step is formed in the box pallet 1 and an article stored in the box pallet 1 is caught on the step and damaged.

In addition, the door member 14 is provided with a positioning convex portion 75 projecting downward from the lower side portion of the door member 14, and the side wall main body side connecting portion 61 of the side wall main body 12 closes the door member 14. A positioning concave portion 76 into which the positioning convex portion 75 is inserted is provided. The positioning projections 75 are provided at the central portion of the door member 14 in the width direction. In this case, the dimensional error (deviation from the designed position) in the width direction of the door member 14 can be made relatively small. The positioning recesses 76 are also provided in the center portion of the side wall main body 12 in the width direction, so that when the side wall main body 12 is molded, dimensional errors in the width direction of the side wall main body 12 can be made relatively small.

Considering the clearances for the side wall main body side hinge member support portions 62, the door side hinge member support portions 66, etc., which are provided at four locations spaced apart from each other by a predetermined distance in the width direction of the long side wall portion 11, the door When closing the member 14, the door member 14 is smoothly accommodated in the opening 13 of the side wall main body 12 (to avoid contact with the portion adjacent to the side edge of the opening 13 on the outer surface of the side wall main body 12). Therefore, a clearance is provided between the width of the door member 14 and the width of the opening 13 of the side wall body 12 according to the clearance amount of the side wall body side hinge member support portion 62, the door side hinge member support portion 66, and the like. It is conceivable to set However, when the door member 14 is relatively large, a not-so-small gap is formed between both sides of the door member 14 in the closed state and the side edges of the opening 13 of the side wall body 12. Regarding the inner surface side of the long-side side wall portion 11, there is a concern that an article accommodated in the box pallet 1 may be caught in the gap.

On the other hand, a positioning convex portion 75 and a positioning concave portion 76 are provided at the center portion in the width direction of the long-side side wall portion 11, which is a position where the dimensional error in the width direction is small, so that the door member 14 in the open state can be closed. In this case, the positioning projections 75 are inserted into the positioning recesses 76, so that the positioning projections 75 and the positioning recesses 76 allow the door member 14 and , and the side wall body 12 can be more accurately positioned. Therefore, the clearance between the width of the door member 14 and the width of the opening 13 of the side wall body 12 can be set according to the clearance amounts of the positioning protrusions 75 and the positioning recesses 76 . As a result, the gap between both side portions of the door member 14 in the closed state and the side edge portion of the opening 13 of the side wall body 12 can be minimized, and the box pallet 1 with the door member 14 in the closed state can be obtained. On the other hand, articles can be accommodated more suitably. Further, the positioning convex portion 75 is formed only by the door outer surface forming portion 18 , and the positioning concave portion 76 is formed in the side wall main body side connecting portion 61 formed only by the side wall outer surface forming portion 16 . Therefore, the positioning projections 75 and the positioning recesses 76 provide a more pronounced effect of more accurately positioning the door member 14 and the side wall main body 12 in the width direction of the long-side side wall portion 11 . can be

Further, when the door member 14 is in the closed state, the positioning protrusions 75 and the positioning recesses 76 are positioned between the plurality of hinge members 51, and displaced. For this reason, for example, when the positioning convex portion 75 and the positioning concave portion 76 and the hinge member 51 are provided side by side in the inside and outside directions of the box pallet 1 (provided at the same position in the width direction of the long side wall portion 11). The thickness of the long-side side wall portion 11 can be made thinner than in the case of FIG. In particular, the long side wall portion 11 (the side wall body 12 and the door member 14) is formed by welding the inner surface forming portions 15 and 17 and the outer surface forming portions 16 and 18 to each other. The thickness can be made thinner than in the case of the long-side sidewall portions having a certain degree of strength and not being welded. Therefore, it is possible to increase the storage capacity of the box pallet 1 with respect to the predetermined outer dimensions.

Furthermore, by providing the positioning recesses 76 so as to penetrate the side wall main body 12 in the thickness direction, the positioning protrusions 75 are less likely to get caught during the operation of inserting them into the positioning recesses 76 when the door member 14 is opened and closed. In addition, the amount of engagement between the positioning protrusion 75 and the positioning recess 76 in the inserted state (areas facing each other in the lateral width direction of the long side wall portion 11) can be made relatively large, and the positioning accuracy can be improved. can.

Further, when the box pallet 1 is assembled and the door member 14 is closed, the side wall lock member 37 is unlocked, and the door member 14 is applied with an upward force by hand. When the side wall portion 11 is lifted and pulled upward from the bottom wall forming portion 2, the lower edge portion of the notch portion 87 of the door member 14 contacts the lower surface of the restriction portion 88 of the side wall main body 12, The upward relative displacement of the door member 14 with respect to the side wall main body 12 is restricted. Therefore, when the long side wall portion 11 in the standing posture is pulled upward from the bottom wall forming portion 2, the hinge member 51, the side wall main body side hinge member support portion 62, and the door side hinge member support portion 66 (and , door locking member 86), the door member 14 can be gripped and the long side wall portion 11 can be lifted upward. Therefore, it is possible to improve the convenience when pulling out the long side wall portion 11 upward from the bottom wall forming portion 2, and to secure the freedom of design such as the arrangement and size of the door member 14. The durability of the hinge member 51, the side wall main body side hinge member support portion 62, and the door side hinge member support portion 66 can be improved.

Further, the side wall main body 12 is provided with a side wall main body side reinforcing member mounting space 91 between the side wall inner surface forming portion 15 and the side wall outer surface forming portion 16 to which a side wall reinforcing member 90 extending in a substantially horizontal direction can be mounted. It is The side wall main body side reinforcing member mounting space 91 extends along the lower edge of the opening 13 , and the side wall reinforcing member 90 mounted in the side wall main body side reinforcing member mounting space 91 extends along the width of the long side wall portion 11 . It extends laterally beyond both side edges of the opening 13 in the direction. Therefore, deformation of the side wall main body 12 can be suppressed. For example, due to deformation of the lower edge of the opening 13 of the side wall main body 12, the side wall main body side hinge member supporting portion 62 is displaced and deformed. It is possible to avoid a situation in which the rotational displacement of the door member 14 becomes difficult due to, for example, the positions of the four side wall main body side hinge member support portions 62 being displaced in the thickness direction of the side wall main body 12 . .

Further, the door member 14 is provided with a door member-side reinforcing member mounting space 93 between the door inner surface constituting portion 17 and the door outer surface constituting portion 18, in which a door reinforcing member 92 extending in a substantially horizontal direction can be mounted. It is The door member-side reinforcing member mounting space 93 extends between the pair of door lock members 86 , and the door reinforcing member 92 mounted in the door member-side reinforcing member mounting space 93 is positioned near one of the door lock members 86 . , to a position near the other door lock member 86 . Therefore, deformation of the door member 14 can be suppressed. For example, due to the deformation of the door member 14, it is difficult to close the door member 14 or set the door lock member 86 to the locked position. can be avoided.

In addition, in the side wall main body side reinforcing member mounting space 91 and the door member side reinforcing member mounting space 93, the side wall main body side reinforcing member is installed at the welded portion between the inner surface forming portions 15 and 17 and the outer surface forming portions 16 and 18. A space groove portion 94 recessed to the outside of the mounting space 91 and the door member side reinforcing member mounting space 93 is provided. For this reason, in the side wall body side reinforcing member mounting space 91 and the door member side reinforcing member mounting space 93, the welding burrs generated at the welded portions between the inner surface forming portions 15 and 17 and the outer surface forming portions 16 and 18 are removed from the space grooves. It can fit in 94. As a result, if the reinforcing members 90 and 92 are tilted due to the welding burrs, or if the welding burrs are damaged due to contact with the reinforcing members 90 and 92 and displace the side wall main body 12 and the door member 14, the damaged welding will occur. It is possible to prevent noise from being generated due to burrs rolling inside the side wall body 12 and the door member 14 .

In addition, it is not limited to the description content of the said embodiment, For example, you may implement as follows. Of course, other applications and modifications not exemplified below are naturally possible.

(a) In the above embodiment, the long side wall portion 11 is detachably attached to the bottom wall forming portion 2, and the short side wall portion 31 is connected to the bottom wall forming portion 2 so as to be rotatably displaceable. It is embodied in a box pallet 1 that can be changed between an assembled state and a folded state, and the door-equipped side wall portion having a door member is configured by welding the inner surface constituting portion and the outer surface constituting portion. It is applicable to containers that For example, when changing the posture of each short side wall portion, the short side wall portion may be once detached from the bottom wall forming portion and attached to the bottom wall forming portion after the posture is changed. Further, the long side wall portion may be configured to be rotatably displaceable (the container can be folded) without being removed from the bottom wall forming portion. Furthermore, the box pallet 1 of the above-described embodiment is configured so that it can be put together in units in a folded state. It is also possible to embody it in a prefabricated container whose state can be changed (for example, each part is stored separately). In addition, in the above-described embodiment, when the box pallet 1 in the folded state is put into the assembled state, the pair of short side wall portions 31 are placed in the upright position, and then the long side wall portions 11 are assembled into the bottom wall forming portion. 2, the assembled state can be obtained by attaching the pair of long side wall portions to the bottom wall forming portion in an upright position and then rotating the pair of short side side wall portions to the upright position. It may be configured to be

(b) In the above embodiment, the bottom wall portion 3 of the bottom wall forming portion 2 is embodied in the box pallet 1 configured in the shape of a pallet. May be applied to containers. Furthermore, as the shape of the pallet-shaped bottom wall portion 3, a shape in which the lower deck portion 8 is omitted, or a two-way insertion type shape in which a fork can be inserted from two side surfaces constituting the outer peripheral surface of the bottom wall portion 3. may be

Also, in the above embodiment, the box pallet 1 is made of polypropylene, but it may be made of other resin materials such as polyethylene, PET, and polyamide. In addition, in the above embodiment, the door member 14 is provided on each of the pair of long side wall portions 11, but the door member 14 may be provided on only one of the long side wall portions 11. In place of or in addition to the configuration in which the door members 14 are provided on the long side wall portions 11, a configuration in which door members are provided on one or both of the short side wall portions 31 may be employed.

(c) In the above embodiment, the opening 13 of the side wall main body 12 penetrates the side wall main body 12 (long side side wall portion 11) in the thickness direction and is provided so as to open upward (the opening 13 However, for example, an opening may be provided so that the upper, lower, right, and left sides are surrounded by the side wall body (the peripheral edge of the opening may be substantially square-shaped). good. In that case, the door member 14 may be connected to the upper edge of the opening of the side wall main body through the hinge member 51 so as to be rotatably displaceable to the outside of the box pallet. Further, for example, the door member 14 may be connected to the side edge of the opening 13 of the side wall body 12 via the hinge member 51 so as to be rotatably displaceable to the outside of the box pallet. The door locking member 86 and the reinforcing members 90 and 92 are appropriately arranged according to which edge of the opening 13 the door member 14 is connected to.

(d) In the above embodiment, the side wall main body side hinge member support portion 62 and the door side hinge member support portion 66 are composed of only the outer surface constituting portions 16 and 18, but only the inner surface constituting portions 15 and 17 are used. may be configured. Even when this configuration is adopted, it is possible to avoid the occurrence of welding burrs in the side wall main body side hinge member support portion 62 and the door side hinge member support portion 66, and the opening and closing operation of the door member 14 is relatively easy. It can be smooth.

(e) In the above embodiment, the groove 70 is provided in the lower edge of the opening 13 of the side wall body 12, but the groove 70 may be omitted. In the above-described embodiment, the side wall main body side connecting portion 61 (side wall main body side hinge member support portion 62) is composed only of the side wall outer surface forming portion 16, and at the lower edge portion of the opening portion 13, the side wall inner surface forming portion 15 and the side wall outer surface forming portion 16 are located on the inner side of the box pallet 1 with respect to the side wall main body side hinge member support portion 62 . Therefore, even if the groove portion 70 is omitted and a welding burr occurs at the lower edge portion of the opening portion 13, the situation in which the welding burr hinders the rotational displacement of the hinge member 51 is suppressed. However, in the closed state of the door member 14, the cover portion 73 is brought as close to the lower edge of the opening 13 of the side wall body 12 as possible to minimize the gap between the inner surface of the door member 14 and the inner surface of the side wall body 12. In order to reduce this, it is desirable to provide a groove 70 at the weld site at the lower edge of the opening 13 .

(f) Furthermore, in the above-described embodiment, the entire cover portion 73 is composed of the door inner surface forming portion 17 and the door outer surface forming portion 18, but the door inner surface forming portion 17 and the door outer surface forming portion 18 Only one of them may be used. However, the cover portion 73 is configured to cover the side wall main body side hinge member support portion 62 from the inside of the box pallet 1 when the door member 14 is closed. Since it is desirable to make the inner surface of the door member 14 as flat as possible without forming a welded portion on the inner surface of the door member 14 , the cover portion 73 is composed of at least the door inner surface forming portion 17 . Further, from the viewpoint of improving durability, it is desirable that at least a portion of the cover portion 73 is composed of the door inner surface forming portion 17 and the door outer surface forming portion 18 (having a two-layer structure). . In addition, in the above-described embodiment, the entire side wall body connecting portion 61 is covered from the inside of the box pallet 1 by the cover portion 73 of the door member 14 in the closed state. As long as at least a portion of the connecting portion 61 is covered, the effect of suppressing contact between the articles stored in the box pallet 1 and the side wall body side connecting portion 61 is exhibited. However, the cover portion 73 preferably covers the side wall main body side hinge member support portion 62 (and the positioning recess 76 ), and more preferably covers the side wall main body side connecting portion 61 entirely.

(g) In the above embodiment, the details of the configuration for restricting upward relative displacement of the door member 14 in the closed state with respect to the side wall main body 12 are not particularly limited, and can be changed as appropriate. The structure of the door lock member 86 is not particularly limited, either. For example, the door lock member 86 may be arranged on both sides of the opening 13 in the side wall body 12 . Furthermore, in the above-described embodiment, the reinforcing members 90 and 92 are provided on the side wall main body 12 and the door member 14, respectively. It may be omitted. In addition, although the reinforcing members 90 and 92 in the above embodiment are steel square pipes, the shape and material of the reinforcing members 90 and 92 can be changed as appropriate, and the side wall main body 12 and the door member 14 can be changed. It is sufficient that the strength and rigidity are enhanced.

DESCRIPTION OF SYMBOLS 1... Box pallet, 2... Bottom wall forming part, 11... Long side side wall part, 12... Side wall body, 13... Opening part, 14... Door member, 15... Side wall inner surface forming part, 16... Side wall outer surface forming part, 17 Door inner surface forming portion 18 Door outer surface forming portion 31 Short side side wall portion 51 Hinge member 53 Side wall corresponding shaft portion 54 Door corresponding shaft portion 61 Side wall body side connecting portion 62 Side wall main body side hinge member support portion 66 Door side hinge member support portion 70 Groove portion 71 Inner protrusion portion 72 Outer protrusion portion 73 Cover portion 75 Positioning protrusion portion 76 Positioning recess portion 86 Door lock member 87 Notch portion 88 Regulating portion 90 Side wall reinforcing member 91 Side wall main body side reinforcing member mounting space 92 Door reinforcing member 93 Door member side reinforcing member mounting space 94 Spatial groove.

Claims (6)

a bottom wall forming portion having a substantially rectangular shape in a plan view;
A container comprising a side wall portion extending upward from each side portion of the bottom wall forming portion,
At least one of the side wall portions has a side wall main body provided with an opening extending through the side wall portion in a thickness direction, an open state in which the opening is opened, and a closed state in which the opening is closed. and a variable door member;
The door member is rotatably displaceably connected to the peripheral portion of the opening of the side wall body through a separate hinge member, and is rotatably displaced outwardly of the container from the closed state. The open state configuration,
Each of the side wall main body and the door member has a synthetic resin inner surface forming portion forming the inner surface side of the side wall portion and a synthetic resin outer surface forming portion forming the outer surface side of the side wall portion. Constructed by welding,
The side wall body includes a side wall body side hinge member supporting portion connected to the hinge member and supporting the hinge member so as to be relatively rotatably displaceable,
The door member includes a door-side hinge member supporting portion connected to the hinge member so as to be relatively rotatable,
A container, wherein the side wall main body side hinge member supporting portion and the door side hinge member supporting portion are each formed of one of the inner surface forming portion and the outer surface forming portion. The side wall body includes a side wall body side connecting portion projecting from the peripheral edge portion of the opening to the inner peripheral side of the opening,
The side wall main body side connecting portion is provided in the outer surface forming portion of the side wall main body,
The side wall main body side hinge member supporting portion is provided in the side wall main body side connecting portion,
The door member includes a cover portion that covers the side wall main body side connecting portion from the inside of the container when the door member is in the closed state,
The cover portion is configured by at least the inner surface forming portion of the inner surface forming portion and the outer surface forming portion of the door member,
2. The container according to claim 1, wherein the inner side of the container in the cover portion is configured by the inner surface forming portion. In the peripheral edge portion of the opening of the side wall main body, the connection corresponding peripheral edge portion corresponding to the side wall main body side connecting portion has an outer peripheral side of the opening at the welded portion between the inner surface forming portion and the outer surface forming portion. A recessed groove is provided in the
At least part of the cover portion is configured by the inner surface forming portion and the outer surface forming portion of the door member,
When the door member is in the closed state, the cover portion is positioned on the inner peripheral side of the opening with respect to the groove portion provided in the connection-corresponding peripheral portion and in the inner and outer peripheral directions of the opening. facing the groove at
3. The container according to claim 2, wherein the inner surface of the side wall main body and the inner surface of the door member in the closed state are substantially flush with each other. The door member is rotatably connected via the hinge member to the peripheral edge portion of the opening of the side wall body with the width direction of the side wall portion with the door serving as an axial direction,
The door member is positioned so as to protrude toward the outer circumference of the opening when the door member is in the closed state from the center portion in the width direction of the door member among the side portions provided with the door-side hinge member support portion. Equipped with a convex part,
The side wall main body is inserted into the positioning convex portion of the door member in the closed state at the central portion in the lateral width direction of the side wall main body, and is opened to the inner peripheral side of the opening, extending in the thickness direction of the side wall main body. Equipped with a positioning recess that penetrates,
The positioning convex portion and the positioning concave portion are provided at positions between a plurality of the hinge members provided at a predetermined distance from each other in the lateral width direction of the side wall portion with the door. Item 4. The container according to any one of items 1 to 3. All of the side wall portions have an upright posture in which they stand above the side portions of the bottom wall-constituting portion corresponding to each side portion of the bottom wall-constituting portion, and a central portion of the bottom wall-constituting portion. It is configured so that the posture can be changed between the lying posture lying on the side,
A container capable of changing its state between an assembled state in which all of the side walls are in the upright posture and a folded state in which all of the side walls are in the lying posture,
The side wall portion with a door is configured to be able to be drawn upward from the bottom wall forming portion at least in the standing posture,
a regulating means for regulating upward relative displacement of the door member with respect to the side wall main body when the door member is in the closed state and the side wall portion with the door is in the standing posture; 5. The container according to any one of claims 1 to 4, characterized in that: The opening is provided so as to leave the side wall main body below the opening and on both sides of the opening when the side wall with the door is in the standing posture,
The door member is rotatably connected to the lower edge of the opening of the side wall body via the hinge member,
On both sides of the door member or on both sides of the opening of the side wall main body, lock positions for restricting rotational displacement of the door member in the closed state and the door member in the closed state are provided. a pair of lock members displaceable between a lock release position that allows rotational displacement of the
a side wall main body-side reinforcing member mounting space in which a reinforcing member extending in a substantially horizontal direction can be mounted between the inner surface forming portion and the outer surface forming portion of the side wall main body and the door member, respectively; , The door member side reinforcing member mounting space is provided,
The side wall main body side reinforcing member mounting space extends laterally beyond both side edges of the opening in the width direction of the side wall with door along the lower edge of the opening,
The door member-side reinforcing member mounting space is arranged between the pair of lock members,
In the side wall main body side reinforcing member mounting space and the door member side reinforcing member mounting space, the side wall main body side reinforcing member mounting space and the above-mentioned 6. The container according to any one of claims 1 to 5, wherein a recessed space groove is provided on the outer side of the mounting space for the reinforcing member on the door member side.

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