JP4044647B2 - Plastic pallet - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a synthetic resin pallet for forklifts used when storing and transporting luggage.
[0002]
[Prior art]
In recent years, a pallet made of synthetic resin, which is excellent in water resistance and corrosion resistance, has been used in many of pallets for storing and transporting luggage in place of wooden pallets. The synthetic resin pallet manufacturing method includes an integral molding method using an injection molding machine and a butt welding molding method for obtaining an integral pallet by butting and welding the divided surfaces of parts that have been divided and molded in advance. As one of the latter butt welding molding methods, there is a method of dividing the pallet load parallel to the placing surface of the pallet at a spar portion. Reinforcing ribs are provided vertically and horizontally on the bottom surface of the deck board of the pallet manufactured by the above method, and the girder connecting the upper and lower deck boards has a hollow structure with the upper and lower surfaces and side surfaces closed.
[0003]
[Problems to be solved by the invention]
As described above, in the case of a hollow structure girder in which the upper and lower surfaces and the side surfaces are closed, there is the following problem when the girder is damaged. The damage of the girder may be caused by, for example, a collision of a fork of a forklift during a transportation operation by the forklift or a collision with another article. If there is no problem in use even if the digit is broken, it is used as it is. If the girder is damaged, water may enter the girder from the damaged part. That is, during cleaning of the pallet, cleaning water may enter from the damaged part, or rainwater may enter from the damaged part during storage outdoors. Rainwater that enters the girder must be drained with the broken part of the girder facing downward, but it is difficult to handle large molded products such as pallets, and it is not possible to completely drain water. Can not. Further, when there are a plurality of damaged portions and the directions are different, the water draining operation becomes more difficult. On the other hand, if rainwater is left in the girder without draining water, the water in the girder may flow out due to vibration during transportation, which may contaminate the loaded cargo. The above is also not preferable.
[0004]
In the butt-welding molding method, the girder has a hollow structure with the upper and lower surfaces closed for reasons of strength. A synthetic resin pallet that can be drained naturally or easily drained has been desired. The present invention has been made in view of the present situation, and an object of the present invention is to provide a synthetic resin pallet that can be drained in a girder without being reduced in strength, or can be easily drained.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the present invention is configured as follows. That is, the synthetic resin pallet according to claim 1 of the present invention connects the upper deck board and the lower deck board via a girder, and the girder has a hollow structure in which a side surface, an upper surface and a lower surface are closed, The upper surface of the girder is closed by an upper plate and a side plate that are part of the smooth plate of the upper deck board, and the lower surface of the girder is closed by a lower plate and a side plate that are part of the smooth plate of the lower deck board. In the synthetic resin pallet, the upper surface of the lower plate in the girder of the lower deck board is a convex surface that protrudes toward the center of the plane, and a plurality of drain holes that communicate with the girder are provided in the peripheral edge of the lower plate. It is characterized by. The synthetic resin pallet according to claim 2 is characterized in that a plurality of drain holes are provided in a peripheral portion of a lower plate of the lower deck board. The synthetic resin pallet according to claim 3 is characterized in that a plurality of drain holes are provided in a side plate of the lower deck board.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the illustrated embodiment will be described in detail. The synthetic resin pallet 10 is a four-way pallet, and two parts of an upper molding member 15 and a lower molding member 17 which are separately separately molded from a substantially middle dividing line 13 of the beam 11 are brought into contact with each other and welded. Is formed integrally. The upper molding member 15 is composed of an upper deck board 15a and a girder part 11a, and the lower molding member 17 is composed of a lower deck board 17a and a girder part 11b, and the end surfaces of the girder part 11a and the girder part 11b are butt-welded. Is molded by. The girder 11 composed of the girder part 11a and the girder part 11b is a hollow structure with closed side surfaces, and a space surrounded by the girder 11, the upper deck board 15a, and the lower deck board 17a is used as a fork insertion port 19. Yes.
[0007]
The upper deck board 15a of the pallet 10 is made of a smooth plate and a reinforcing rib , and the outer peripheral surface is closed by a side plate 22, and the lower deck board 17a is made of a smooth plate and a reinforcing rib , and the outer peripheral surface is closed by a side plate 26. It has been. The upper surface of the girder 11 is closed by an upper plate 20a which is a part of the smooth plate 20, and the lower surface is closed by a lower plate 23a which is a part of the smooth plate .
[0008]
FIG. 2 shows a first embodiment of the present invention, in which the upper surface of the lower plate 23a is formed as a convex surface 30 projecting toward the center of the plane, and a plurality of drain holes 31 are formed in the peripheral portion thereof. . In order to make the upper surface of the lower plate 23a the convex surface 30, the thickness of the peripheral portion is the same as the thickness of the smooth plate of the other part of the deck board or slightly thinner and gradually thicker toward the center portion. What is necessary is just to form. As described above, when the drain hole 31 is formed in the peripheral edge of the lower end of the girder, it is possible to naturally drain rainwater or the like that has entered from the damaged portion of the girder even if the pallet is inclined in any direction. .
[0009]
FIG. 3 shows a second embodiment of the present invention . As in the first embodiment, the upper surface of the lower plate 23a is formed as a convex surface 30 protruding toward the center of the plane, and is adjacent to the lower plate 23a of the side plate 26. A drain hole 33 is opened in the side surface. As in this embodiment, when the drain hole 33 is drilled in the side plate 26, it is possible to prevent intrusion of earth and sand from the drain hole even when the pallet is installed on the ground and stored. By lifting and tilting one of the side edges of the pallet, it is possible to drain the rainwater or the like accumulated in the girder at once. Further, by forming the drain hole 33 in the side plate 26, when the pallets are stacked, rainwater or the like entering the girders of the upper pallet can be drained to the side surface of the lower pallet.
[0010]
FIG. 4 shows a third embodiment of the present invention, in which a drainage groove 35 that intersects at the center of the lower plate 23a and reaches the peripheral edge is provided, and a drainage hole 36 that opens into the drainage groove 35 is provided. It is. When the drainage groove 35 is provided as in this embodiment, the thickness of the lower plate 23a can be made constant and natural drainage can be smoothly performed.
[0011]
In the double-sided pallet, it is preferable to provide a drain hole having the same configuration on the upper plate 20a as well as the lower plate 23a. Further, the drain holes of the above-described embodiment can be used in combination, and can be appropriately modified and changed. For the sake of convenience of explanation, the structure of the reinforcing ribs inside the girders is omitted. However, depending on the structure of the reinforcing ribs , it is preferable to cut out one or several lower ends of the reinforcing ribs so as not to prevent drainage.
[0012 ]
【The invention's effect】
According to the synthetic resin pallet according to the present invention, since the drain hole is provided in the deck board forming the lower end portion of the girder, even when rainwater or the like enters the girder from the damaged portion, it can be drained naturally. Therefore, not only can a hygienic pallet be used at all times, but the loaded luggage is not contaminated.
[Brief description of the drawings]
FIG. 1 is an explanatory perspective view showing an example of a pallet according to the present invention.
FIG. 2 is an explanatory cross-sectional perspective view showing the first embodiment.
FIG. 3 is an explanatory sectional perspective view showing a second embodiment.
FIG. 4 is an explanatory sectional perspective view showing a third embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Synthetic resin pallet 11 Girder 11a Girder part 11b Girder part 13 Dividing line 15 Upper molding member 15a Upper deck board 17 Lower molding member 17a Lower deck board 19 Fork insertion port 20 Smooth plate 20a Upper board 22 Side board 23a Lower board 26 Side board 30 Convex surface 31 Drain hole 33 Drain hole 35 Drain groove 36 Drain hole

Claims (3)

The upper deck board and the lower deck board are connected via a girder, and the girder has a hollow structure in which a side surface, an upper surface and a lower surface are closed, and the upper surface of the girder is a part of a smooth plate of the upper deck board. it is closed by a top plate and a side plate, in order of the lower surface of the synthetic resin pallet that is closed by the lower plate and the side plate which is part of the smoothing plate of the lower deck boards, bottom in the order of the lower deck board plate A synthetic resin pallet comprising a plurality of drainage holes communicating with the inside of the girder at the peripheral edge of the lower plate . The synthetic resin pallet according to claim 1 , wherein a plurality of drain holes are provided in a peripheral portion of a lower plate of the lower deck board . The synthetic resin pallet according to claim 1, wherein a plurality of drain holes are provided in a side plate of the lower deck board .

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