JP2510063B2 - Box type pallet - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a box type pallet used for temporary storage of factory waste, transportation of parts and the like.

[0002]

2. Description of the Related Art In recent years, there has been an increasing demand for box type pallets for temporary storage of factory waste. In the box-type pallet, the rear edge of the bottom lid is rotatably attached to the rear edge of the lower end of the box whose upper and lower ends are open so that the bottom lid can open and close the lower opening of the box. It is configured. Such a pallet is placed in the factory and the waste generated in the factory is stored in the box type pallet. Then, when loading the waste to the truck to carry it out of the factory, for example, a box-type pallet is lifted by a forklift truck and placed on the truck bed, and the box-type pallet is lifted upward while the bottom lid is opened. , Load the waste in the pallet by dropping it onto the truck bed.

A bottom lid locking device for locking the bottom lid of such a box type pallet in a closed state is disclosed in, for example, Japanese Patent Publication No. 52-23489. In this bottom lid locking device, while the hook receiving metal fitting is fixed to the bottom lid side, the hook that is swingably attached to the box body side is engaged with the hook receiving metal fitting to lock the bottom lid. There is. Further, in this device, a cam for swinging the hook in the disengagement direction is attached, and by rotating the cam through the operation lever to swing the hook, the engagement between the hook and the hook receiving metal fitting is achieved. The bottom cover is opened in this way.

[0004]

However, in the above bottom lid lock device, when the pallet is suspended,
Much of the load of the bottom lid is applied to the engaging part of the hook with the hook receiving metal fittings, and especially when waste is stored in the pallet, the load of the waste material is also applied to the hooks, and the hook and the hook receiving metal fitting are attached. And are pressed against each other with a strong force, and a great frictional force is generated between them. Therefore, there is a problem that a great amount of operating force is required when swinging the hook to release the engagement with the hook receiving fitting, and operability at the time of opening the bottom lid cannot be ensured satisfactorily.

On the other hand, generally, in the box type pallet, when the bottom lid is opened, the rear end of the bottom lid is brought into contact with the receiving portion on the box body side to hold the bottom lid at a predetermined opening angle. However, when the bottom lid is opened, the loads of the bottom lid and the stored waste are instantaneously concentrated and applied to the receiving portion on the box body side, and that portion is deteriorated early. Therefore, it has been conventionally desired to prevent early deterioration of the bottom lid receiving portion and improve durability.

Further, in recent years, when a plurality of box-type pallets are stacked and used in multiple stages, positioning between the upper and lower pallets, especially the development of means for positioning in all four horizontal directions, has been developed. Is desired.

A first object of the present invention is to solve the above-mentioned problems of the prior art, to ensure good operability when the bottom cover is opened, and to easily open the bottom cover even when the pallet is suspended. It is to provide a box-type pallet that can be opened.

A second object of the present invention is to provide a box type pallet which can further improve the durability while achieving the first object.

A third object of the present invention is to achieve the above-mentioned first or second object, and further, in the case of stacking and using in a multi-stage manner, a box type capable of performing a vertical positioning smoothly. Is to provide pallets.

[0010]

In order to achieve the above-mentioned first object, the invention according to claim 1 rotates the rear edge of the bottom lid to the lower edge rear edge of the box body whose upper and lower ends are open. A box-type pallet that is freely attached and configured to open and close the lower end opening of the box body by its bottom lid,
A hook receiver is fixed to a side front end of the bottom lid, an upper part of a rearward hook is rotatably attached to a front end of a lower edge of the outer surface of the side plate of the box body, and the hook is rotated rearward by an urging force of an urging mechanism. By engaging the hook receiving member with the biased rearward hook, the bottom lid is locked in the closed state, while the lower end of the operating lever is at the lower edge portion on the outer surface of the side plate of the box body. While being rotatably attached to the end, the lower end of the connecting lever is attached to the upper end of the rearward hook, the front end of the connecting rod is rotatably attached to the upper end of the connecting lever, and the rear end of the connecting rod is attached. The connecting lever is rotatably attached to a lower portion of the operating lever, and the connecting rod is retracted by rotating the operating lever to move the connecting lever to the rear hook. Rotate against the biasing force of the biasing mechanism is adapted to release the engagement to the backward curved hook of the hook bracket as to be.

In order to achieve the second object, the second aspect
In the box type pallet described in claim 1, hitting metal fittings are attached to both sides of a rear portion on the lower surface side of the bottom lid, and on both sides of a rear leg portion fixed to a lower edge rear edge portion of the box body. , One edge of each stopper plate is welded, and the other edge of each stopper plate is welded to both sides of the lower end of the box body, and a cushioning member is provided in each area of the stopper plate facing the hitting metal. When the bottom cover is attached and the bottom cover is opened, the hitting metal piece contacts the stopper plate via the cushioning member, and the bottom cover is held at a predetermined opening angle.

In order to achieve the third object, the third aspect of the present invention is provided.
In the box-type pallet described in claim 1 or 2, the fork insertion holes are formed at both side positions of the front plate and the rear plate of the box body, while the lower surface front edge portion of the bottom lid is formed. The front end of the box body, the upper end of the box body corresponding to the inside of each of the four corners formed by the rear leg part and the both side leg parts fixed to both side edge parts of the lower surface of the bottom lid. Positioning members are attached to the insides of the four corners so as to protrude substantially upward.

[0013]

In the box type pallet according to claim 1, a rear hook is rotatably attached to the box body side in correspondence with the hook receiver on the bottom lid side, and the lower end of the connecting lever is fixed to the upper end of the hook. , While rotatably attaching the front end of the connecting rod to the upper end of the connecting lever,
The rear end of the connecting rod is rotatably attached to the lower part of the operating lever, and the rotating operation of the operating lever causes the connecting rod to retreat and the rear hook to rotate in the disengaging direction via the connecting lever. ing. Therefore, due to the lever action defined by the connecting lever or the like, a large rotational force is generated in the hook even with a small operating force.

In the box type pallet according to the second aspect of the present invention, while the hitting metal fittings are attached to the rear portions on both lower surfaces of the bottom lid, the stopper plates for receiving the hitting metal fittings are provided at the lower end of the box body and the rear leg portions. Since the contact metal is abutted on the stopper plate and a load such as a bottom lid is applied to the stopper plate, the load is dispersed to the lower end of the box body and the rear leg portion. Moreover, since the cushioning member is attached to the contact area of the stopper plate with the hitting metal fitting, the impact force on the stopper plate at the time of contacting the hitting metal fitting is alleviated.

In the box type pallet according to the third aspect of the present invention, the box pallet is formed of the front leg portion, both side leg portions and the rear leg portion.
Since the positioning members are attached to the insides of the four corners at the upper end of the box body corresponding to the insides of the four corners, respectively, when stacking a plurality of box-type pallets, the four positioning members of the lower pallet are The upper pallet will be locked inside the four corners formed by the front leg, both side legs and the rear leg.

[0016]

1 is a perspective view showing a box type pallet according to an embodiment of the present invention, and FIG. 2 is a side view of the pallet. As shown in both figures, this pallet has a box body (10) and a bottom lid (20). The box body (10) is formed in a rectangular tube shape with both upper and lower ends open, and is composed of a front plate (10a), both side plates (10b) and a rear plate (10c), while a bottom cover (20). ) Is formed in a rectangular shape following the shape of the lower end opening of the box body (10). The hinge shaft (11) is attached to the lower end of the box body (10) along the rear edge thereof, and the rear edge of the bottom lid (20) is rotatably attached to the shaft (11), whereby the box (11) is attached. The bottom opening of the main body (10) can be opened and closed by the bottom lid (20).

At the rear edge of the lower end of the box body (10),
The rear leg (33) is fixed by the welding process. Further, a front leg portion (31) is fixed to a lower surface front edge portion of the bottom lid (20) by a welding process, and both side leg portions except the rear ends of the bottom lid (20) are attached to both lower surface front edges. (32) are fixed by the welding process. On both sides of the bottom surface of the bottom lid (20), L-shaped metal fittings (40) having a thickness of 16 mm are attached by welding from the rear end position to the rear end surfaces of the leg portions (32).

As shown in FIG. 3, the upper edge of the stopper plate (41) having a thickness of 4.5 mm is fixed to the rear ends of both sides of the lower end of the box body (10) by a welding process. The stopper plate (41) is arranged so as to cover the hitting metal fitting (40) from the outside, and the region facing the hitting metal fitting (40) is bent inward, so that the bent piece (41a) The leading edge is fixed to both end surfaces of the rear leg portion (33) of the box body (10) by welding. At this time, the bent piece (41) of the stopper plate (41)
(a) is arranged so as to be inclined forward at a predetermined inclination angle. Further, on the inclined surface of the bent piece (41a), a buffer member (42) made of hard urethane rubber or the like is fixed by a fixing tool (43) such as a bolt. 1 and 2, the side surface of the box-type pallet on the opposite side (not shown) is also configured in the same manner as above.

With this configuration, the bottom lid (2
0) is opened, the metal fittings (40) (40) are supported by abutting against the stopper plates (41) (41) through the cushioning members (42) (42), respectively, and the bottom lid (20) is fixed. Will be held at the opening angle of.

Guide plates (21) and (21) are fixed to both side edges of the upper surface of the bottom lid (20) so as to stand up along those edges. Furthermore, the front legs (3
The hook receiving fittings (22) are fixed to both end faces of 1) so as to project laterally, and the guide plates (23) (23) are arranged above the hook receiving fittings (22). ) Are fixed to both end surfaces of the front leg part (31) in a posture in which they are respectively inclined forward.

On the other hand, as shown in FIGS. 1, 2 and 4,
A rotating shaft (24) is rotatably attached to the lower edge front edge of the box body (10) along the front edge. At both ends of the rotating shaft (24), the hook receiving fittings (22) are provided.
The upper parts of the hooks (51) and (51) are fixed to correspond to the respective (22), and the hooks (51) and (51) are fixed.
The engaging pieces (51a) (51a) formed at the lower end of the are arranged so as to face rearward. In this case, the both hooks (51) (51) rotate along the both side surfaces of the box body (10) in synchronization with each other with the rotation of the rotation shaft (50) about the shaft (50) as a fulcrum. Is configured.

Further, on one side surface side of the box body (10), a connecting lever (52) is provided at an upper end of the hook (51).
The bottom edge of is fixed. On the other hand, a support member (53) is fixed to the rear portion of the lower end on one side surface side of the box body (10), and the operation lever (54) is fixed to the support member (53).
The lower end of the
4) is configured to be rotatable along the one side surface of the box body (10) with its lower end as a fulcrum. Further, the rear end of the connecting rod (55) is rotatably attached to the lower portion of the operating lever (54), and the front end of the connecting rod (55) is rotatably attached to the upper end of the connecting lever (52). .

An urging mechanism including a cylinder (56) and the like is arranged at a position below the center of the connecting rod (55). That is, on one side of the box body (10),
The cylinder (56) is fixed in a rearward facing state. A tension spring (not shown) is housed inside the cylinder (56), and the cylinder rod is urged in the housing direction by the urging force of the tension spring. Further, the tip of the cylinder rod is connected to the substantially central portion of the connecting rod (55) via the connecting member (57), whereby the connecting rod (55) is directed forward by the urging force of the tension spring in the cylinder (56). Is urged to advance. The urging mechanism is naturally
However, it is not limited to such a configuration,
In addition to those that use ildampers and gas springs
From a well-known elastic member
Of course, it is also good.

Then, as shown by the solid lines in FIGS. 2 and 4, when the bottom lid (20) is closed, the cylinder (5
Due to the advancing bias of the connecting rod (55) by 6), the connecting lever (52) together with the rearward hooks (51) (51) rotationally bias toward the paper surface of FIG. 2 in the counterclockwise direction, that is, the engaging direction. Then, the hook receiving fittings (22) (22) on the bottom lid (20) side are engaged with the engaging pieces (51a) (51a) of the hooks (51) (51). This allows the bottom lid (2
0) is locked in the closed state.

From this locked state of the bottom lid, as shown in the phantom line in FIG. 4, the operation lever (54) is moved to the cylinder (5
When a predetermined amount of clockwise operation is performed in the clockwise direction against the urging force of 6), the connecting rod (55) retracts and the connecting lever (52) moves to the hooks (51) (51). Originally, the hook receiving fitting (22) of the hooks (51) (51) rotates in the clockwise direction of FIG. 2, that is, the disengagement direction.
The engagement with (22) is released. At this time, if the box-type pallet is suspended, the bottom lid (20) will open due to its own weight.

As described above, since the bottom cover (20) is held at a predetermined opening angle when opened, if the box type pallet is lowered to the ground in this state, the bottom cover (2
The front leg (31) of (0) is pushed upward by the ground, and the bottom lid (20) is closed. At this time, the guide member (2) arranged above the hook receiving metal fittings (22) (22).
3) Hooks (51) (5) along the inclined surface of (23)
1) Once rotated in the disengagement direction, the engagement piece (51
a) When the (51a) gets over the hook receiving metal fittings (22) (22), the hooks (51) (51) rotate in the engaging direction by the urging force of the cylinder (56), and the hooks (51) ( The hook receiving fittings (22) and (22) are engaged with the engaging pieces (51a) and (51a) of 51). Thus, at the same time when the bottom lid (20) is closed, the bottom lid (20) is locked.

As shown in FIGS. 5 and 6, a safety device including a stopper (61) and the like is provided at the lower rear position of the operating lever (54). The stopper (61)
It is formed in a deformed fan shape, and its outer peripheral portion has a short side portion (6
6), a long side portion (67) set to be longer than the short side portion (66), a short side portion (66) and a long side portion (6).
And an arc portion (68) connecting 7) in a substantially arc shape. Further, the stopper (61) has a protrusion (64) for preventing over-rotation at the end of the arc portion (68) on the long side portion (67) side.
And the operating lever (65) is formed on one main surface.
Is projected. Then, the top portion (62) defined by the intersection of the short side portion (66) and the long side portion (67) of the stopper (61) is provided on one side surface of the box body (10) via the support shaft (70). The stopper (61) is rotatably attached and is configured to be rotatable along one side surface of the box body (10). In this case, the stopper (61)
Is arranged such that its short side portion (66) is located on the counterclockwise side toward the paper surface of FIG. 5 with respect to the long side portion (67), and the supporting shaft (70) of the arc portion (68). ) Is increased as the distance from the clockwise increases.

Then, as shown by the solid line in FIG. 5, the operating lever (65) is grasped by hand, and the stopper (61) is rotated counterclockwise in the same figure, so that the stopper (61) is supported by the support shaft (70). ) And the operating lever (54), the operating lever (54) is locked to the box body (10) via the stopper (61) and the support shaft (70), and the operating lever (54) Of the hook (51) in the disengagement direction and the backward movement of the connecting rod (55) are restricted, thereby restricting the opening of the bottom lid (20). Also, from the bottom lid open regulation state, as shown in the imaginary line of FIG. 5, the stopper (61)
Is rotated clockwise in the figure, the stopper (61) comes out between the operation lever (54) and the support shaft (70), the movement restriction of the operation lever (54) is released, and the operation lever (54) is released. ), The bottom lid (20) can be opened. In this case, the stopper (61) rotates vigorously clockwise, and the stopper (61)
Even if an attempt is made to intervene between the operation lever (54) and the support shaft (70) from the lower side, the excessive rotation preventing protrusion (64)
By contacting the support member (53), the stopper (61) can be prevented from intervening between the operation lever (54) and the support shaft (70) from below.

By the way, the stopper (61) is formed in a deformed fan shape as described above, and the short side portion (66) is arranged on the intervention direction side between the operation lever (54) and the support shaft (70). Since the long piece portion (67) is arranged on the opposite side to the intervention direction, the stopper (61) intervenes between the operation lever (54) and the support shaft (70), for example, in the case of the box bottom opening restriction state. When vibration etc. occurs in the mold pallet, the vibration causes the stopper (61).
Shifts downward due to its own weight. At this time, as described above, the distance from the support shaft (70) of the arc portion (68) increases as it goes clockwise in FIG. 5,
The operation lever (54) is provided with an arc portion (6) of the stopper (61).
It is pushed forward along 8), and the opening of the bottom lid (20) is regulated more reliably. As described above, the open restriction state by the stopper (61) is not released even with respect to vibration and the like, and sufficient safety is provided.

FIG. 7 shows a perspective view of the upper part of the box type pallet. As shown in the figure, fork insertion holes (12) through which forks of a forklift truck can be inserted and removed are formed at both sides of the front plate (10a) and the rear plate (10c) of the box body (10). You. Further, a positioning member (13) at the time of stacking, which also serves as a hanger, is mounted slightly inside the four corners at the upper end of the box body (10) so as to project substantially upward. This positioning member (13) can be used not only as a hanging fitting when hoisting by a crane or the like, but also when positioning a plurality of box-type pallets as shown in the phantom line in FIG. Material (13)
Of the upper pallet, the front leg (31) and the side legs (3
2) and the inside of the four corners formed by the rear legs (33) respectively, all four horizontal positionings are achieved.

In FIG. 1, (80) is a string for remotely operating the operating lever (54), and (81) is for guiding the operating direction of the operating lever (54) and for restricting the operating amount. Is a guide member.

When this box-type pallet is used for temporary storage of waste in a factory, for example, the bottom cover (2
0) is closed, the stopper (61) is set to the open restriction state as shown by the solid line in FIG. 6, and the stopper (61) is placed in the factory in that state. Then, the waste generated in the factory is stored in the pallet through the upper opening of the box-type pallet. At the time of storage, in this box-type pallet, since the positioning members (13) are attached to the four corners at the upper end of the box body (10), the work of storing waste can be performed smoothly. That is, if the positioning member is attached near the center of the front plate and the rear plate, the waste comes into contact with the positioning member to hinder the storage of the waste, but in this pallet, the positioning member (13) is used. Is located in the corner,
The waste hardly touches the positioning member (13) during storage, and the waste can be stored smoothly.

Next, when the waste stored in the box type pallet is loaded on the bed of the truck for discharging to the outside of the factory, the stopper (61) is rotated to open it as shown by the imaginary line in FIG. After setting to the allowable state, the fork of the forklift truck is inserted into the fork insertion hole (12) of the box type pallet and the box type pallet is lifted above the truck bed. The operating lever (54) is connected to the cord (80).
Open the bottom lid (20) by pulling backwards through. In this case, the lower end of the connection lever (52) is rotatably attached to the upper end of the hook (51), and the rotation of the connection lever (52) causes the hook (51) to rotate in the disengagement direction. Due to the lever action defined by the connecting lever (52) and the like, a large rotational force can be generated on the hook (51) even with a small operating force. Therefore, the load of the bottom lid (20) and the waste is applied to the hook (51), and the hook (51) and the hook receiving metal fitting (2).
2) Even if a large frictional force is generated between
The engagement between the two can be released smoothly. Therefore, even when the Bucks type pallet is suspended, the bottom lid (20) can be opened, and the operability when opening the bottom lid can be favorably ensured. However, when the bottom lid (20) is opened, it is not always necessary to suspend the pallet, and the bottom lid (20) is unlocked while the pallet is placed on the truck bed to lift the pallet. However, the bottom lid (20) may be opened.

Thus, when the bottom lid (20) is opened,
The waste stored in the box-type pallet is dropped from the lower end opening of the box body (10), and the bottom lid (2
It slides down the upper surface of 0) and is loaded on the truck bed. At this time, since the guide plates (21) and (21) are attached to both side edges of the upper surface of the bottom lid (20),
The guide plates (21) (21) prevent the waste from being scattered, so that the waste can be accurately guided to a desired position on the loading platform.

Further, while the hitting metal fittings (40) are attached to the rear portions on both sides of the lower surface of the bottom lid (20), the hitting metal fittings (40)
Since the stopper plate (41) that receives the welding is welded to the lower end of the box body (10) and the rear leg (33) at two locations, the hitting metal fitting (40) comes into contact with the bottom of the stopper plate (41). When the load of the lid (20) and the waste is applied, the load is distributed to the lower end of the box body (10) and the rear leg part (33). For this reason, local concentration of the load is avoided, premature deterioration of the bottom lid supporting portion such as the stopper plate (41) is prevented, and the durability performance is improved. Moreover, since the buffer member (42) such as hard urethane rubber is attached to the contact area of the stopper plate (41) with the hitting metal fitting (40), the buffer member (42) is attached.
As a result, the impact force on the stopper plate (41) at the time of contact of the hitting metal piece (40) is alleviated, and from this point as well, the stopper plate (41) is prevented from premature deterioration and the durability is further improved.

After the waste is loaded on the loading platform of the truck, the box type pallet is once lowered on the loading platform and the bottom lid (20) is closed as described above, and then returned to a predetermined position. .

In the treatment of such waste,
When a crane is used instead of the forklift truck, the hook of the crane may be hooked on the positioning member (13) at the upper end of the box-type pallet to raise and lower the pallet and move it horizontally.

On the other hand, when changing the arrangement position of the box type pallet placed in the factory by using, for example, a forklift truck, the hook (51) of the box type pallet, the connecting lever (52), the operation during the pallet transfer. Even if the bottom cover opening mechanism such as the lever (54) and the connecting rod (55) accidentally comes into contact with the operator's body or peripheral equipment, the stopper (61) is in the bottom cover opening regulation state shown by the solid line in FIG. Once you have set, it is prevented from actuation of the bottom lid opening mechanism, bottom lid (20) is prevented from inadvertent opening of.

In the above embodiment, the box-type pallet is used for waste treatment, but the present invention is not limited to this, and it can be used for conveying small items such as parts.

[0040]

As described above, according to the box type pallet of the first aspect, the rear hook is rotatably attached to the box body side so as to correspond to the hook receiver on the bottom lid side, and the upper end of the hook. Secure the lower end of the connecting lever to
The front end of the connecting rod is rotatably attached to the upper end of the connecting lever, and the rear end of the connecting rod is rotatably attached to the lower part of the operating lever. Is rotated in the disengagement direction via the connecting lever, the lever action defined by the connecting lever etc.
Even with a small operating force, a large amount of torque is generated on the hook. Therefore, it is possible to ensure good operability when opening the bottom lid, and for example, even when a load such as the bottom lid is applied to the hook and a large frictional force is generated between the hook and the hook receiver, Since the engagement between them can be released smoothly, the bottom lid can be easily opened even when the pallet is suspended.

According to the box type pallet of the second aspect, while the metal fittings are attached to the rear portions on both sides of the lower surface of the bottom lid,
Since the stopper plate for receiving the hitting metal is welded to the lower end of the box body and the rear leg at two places, when the hitting metal comes into contact with the stopper plate and a load such as a bottom lid is applied, Since the load is distributed to the lower end of the box body and the rear legs, local concentration of the load is avoided, premature deterioration of the bottom plate receiving portion such as the stopper plate is prevented, and durability is improved. Moreover, since the cushioning member is attached to the contact area of the stopper plate with the hitting metal, the impact force on the stopper plate when the hitting metal abuts is mitigated, and from this point also the early deterioration of the stopper plate is prevented. The durability is further improved.

According to the box type pallet of the third aspect, the inside of the four corners at the upper end of the box body corresponds to the inside of the four corners formed by the front leg, the side legs and the rear leg, respectively. Since the positioning members are attached to the four pallets, the four positioning members of the lower pallet are formed by the front leg portion, the side leg portions, and the rear leg portion of the upper pallet when stacking a plurality of box-type pallets. By locking the inside of each corner, positioning in all four horizontal directions can be achieved.

[Brief description of drawings]

FIG. 1 is a perspective view showing a box type pallet according to an embodiment of the present invention.

FIG. 2 is a side view showing a box type pallet according to an embodiment.

FIG. 3 is a perspective view showing one corner portion on the rear side of the lower end of the box-type pallet of the embodiment.

FIG. 4 is a perspective view showing a bottom lid opening mechanism of the box-type pallet of the embodiment.

FIG. 5 is a side view showing a peripheral portion of a stopper of the box-type pallet of the embodiment.

FIG. 6 is a perspective view showing a stopper of the box-type pallet of the embodiment.

FIG. 7 is a perspective view showing the upper portion of the box-type pallet of the embodiment.

[Explanation of symbols]

 10 ... Box body 10a ... Front plate 10c ... Rear plate 12 ... Fork insertion hole 13 ... Positioning member 20 ... Bottom lid 22 ... Hook receiving metal fitting 40 ... Hitting metal fitting 41 ... Stopper plate 42 ... Buffer member 51 ... Hook 52 ... Connecting lever 55 ... Connection rod 56 ... Cylinder (biasing mechanism) 54 ... Operation lever

Claims (3)

(57) [Claims] 1. A rear edge portion of a bottom lid is rotatably attached to a lower edge rear edge portion of a box body whose both upper and lower ends are open, and the bottom lid portion is configured to open and close the lower end opening portion of the box body. In the box-type pallet, a hook receiver is fixed to a side front end of the bottom lid, an upper portion of a rearward hook is rotatably attached to a front end of a lower edge portion on an outer surface of a side plate of the box body, and a biasing mechanism is attached. The bottom cover is locked in the closed state by engaging the hook receiver with the rearward hook that is urged to rotate rearward by the force, while the lower end of the operating lever is the outer surface of the side plate of the box body. The lower end of the connecting rod is rotatably attached to the rear end of the lower edge of the connecting hook, while the lower end of the connecting lever is attached to the upper end of the rearward hook, while the front end of the connecting rod is rotatably attached to the upper end of the connecting lever. And the rear end of the connecting rod is rotatably attached to the lower part of the operating lever,
By rotating the operating lever, the connecting rod is retracted, and the connecting lever is rotated together with the rearward hook against the biasing force of the biasing mechanism to move to the rearward hook of the hook receiver. A box-type pallet characterized by being disengaged. 2. A metal fitting is attached to both sides of a rear portion on the lower surface side of the bottom lid, and one edge portion of a stopper plate is welded to both sides of a rear leg portion fixed to a lower edge rear edge portion of the box body. At the same time, the other edge of each stopper plate is welded to both sides of the lower end of the box body, and a buffer member is attached to each of the regions of the stopper plate facing the hitting metal fittings to open the bottom lid. 2. The box-type pallet according to claim 1, wherein the hitting metal is brought into contact with the stopper plate via the cushioning member to hold the bottom lid at a predetermined opening angle. 3. A fork insertion hole is formed at each side of the front plate and the rear plate of the box body, and a front leg portion fixed to a lower front edge of the bottom lid and a bottom lid of the bottom lid. Corresponding to the insides of the four corners formed by the side legs fixed to the both side edges of the lower surface and the rear legs, respectively, the inside of the four corners of the upper end of the box body is directed substantially upward. The box-type pallet according to claim 1 or 2, wherein the positioning members are attached so as to project.