JPH1149165A - Synthetic resin pallet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate draining of exhausted water in a beam without reducing strength by forming a drain hole connected with the inside of the beam on a deck board at a lower end of the beam. SOLUTION: An upper molded member comprising an upper deck board 15a and a beam part 11a and a lower molded member comprising a lower deck board 17b and a beam part 11b are butt-welded on end faces of the beam part 11a and the beam part 11b which are divided faces to form the synthetic resin pallet. An upper face of a beam comprising the beam parts 11a and the beam part 11b is closed by an upper plate 20a being a part of a smooth plate 20, while a lower face is closed by a lower plate 23a being a part of a smooth plate 23. In this case, an upper face of the lower plate 23a is a recessed face 29 recessed toward the center, while a water drain hole 27 is opened at its center. Thus even if rainwater enters due to damage of the beam, it can be naturally drained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synthetic resin pallet for a forklift used for storing and transporting luggage.

[0002]

2. Description of the Related Art In recent years, in many pallets for storing and transporting luggage, synthetic resin pallets having excellent water resistance and corrosion resistance have been used instead of wooden pallets. Methods of manufacturing a synthetic resin pallet include an integral molding method using an injection molding machine, and a butt welding molding method of butt-welding divided surfaces of previously divided parts to obtain an integrated pallet. As one of the latter butt welding methods, there is a method in which a pallet is divided at a girder portion in parallel with a load-carrying surface of a pallet. Reinforcing ribs are provided vertically and horizontally on the lower 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 closed upper and lower surfaces and side surfaces.

[0003]

As described above, in the case of a girder having a hollow structure in which the upper and lower surfaces and side surfaces are closed, the following problems occur when the girder is damaged. The breakage of the girder may be caused, for example, by a collision of a fork of a forklift during a carrying operation by the forklift or by a collision with another article. If there is no problem in use even if the girder is damaged, it is used as it is. If the girder is damaged, water may enter the girder from the damaged part. That is, during the washing of the pallet, the washing water may enter from the damaged portion, or the rainwater may enter from the damaged portion during storage outdoors. Rainwater, etc. that has entered the girder must be drained with the damaged part of the girder facing downward, but it is difficult to handle large molded products such as pallets, and it is impossible to completely drain water. Can not. In addition, if there are a plurality of damaged portions and their directions are different, draining work becomes more difficult. On the other hand, if rainwater etc. is left in the girder without draining water, vibrations during transportation may cause water in the girder to leak and contaminate the loaded luggage, Above is also not preferred.

In the butt welding method, the spar has a hollow structure with closed upper and lower surfaces for strength reasons. Therefore, the spar is not limited to a structure that can be prevented from being damaged. There has been a demand for a synthetic resin pallet that can be drained naturally when drained or can be easily drained. The present invention has been made in view of such a situation,
It is an object of the present invention to provide a synthetic resin pallet in which the girder can be drained naturally without reducing the strength or in which drainage can be easily performed.

[0005]

The present invention has the following configuration to achieve the above object. That is, in the synthetic resin pallet according to claim 1 of the present invention, the upper deck board and the lower deck board are connected via a girder, and the upper and lower surfaces of the girder are closed. A drain hole communicating with the inside of the girder is provided on the deck board of the present invention. The pallet made of synthetic resin according to claim 2 is characterized in that a drainage hole is provided in a lower plate at a girder portion of the lower deck board. Further, the synthetic resin pallet according to claim 3 is characterized in that the upper surface of the lower plate is formed as a concave surface gradually depressed toward the center of the plane, and a drain hole is formed substantially at the center of the concave surface. I do.
Further, the synthetic resin pallet according to claim 4 is characterized in that the upper surface of the lower plate is formed as a convex surface gradually protruding toward the center of the plane, and a drain hole is formed in a peripheral portion of the lower plate. I do. The pallet made of synthetic resin according to claim 5 is
A drain hole is provided in a side plate of the lower deck board.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The illustrated embodiment will be described below in detail. The synthetic resin pallet 10 is a four-sided pallet, in which two parts, an upper molding member 15 and a lower molding member 17, which have been separately formed in advance from a dividing line 13 substantially at the center of the spar 11, are welded by joining their divided surfaces. By doing so, they are integrally formed. The upper molded member 15 is composed of an upper deck board 15a and a girder 11a, and the lower molded member 17 is composed of a lower deck board 17a and a girder 11b. The end faces of the girder 11a and the girder 11b are butt-welded. Formed by The spar 11 composed of the spar 11a and the spar 11b is a hollow structure having a closed side surface, and the spar 11 and the upper deck board 1
A space surrounded by the lower deck board 5a and the lower deck board 17a is a fork insertion port 19.

The upper deck board 15a of the pallet 10
Is composed of a smooth plate 20 and a reinforcing rib 21, the outer peripheral surface is closed by a side plate 22, and the lower deck board 17 a is composed of a smooth plate 23 and a reinforcing rib 25, and the outer peripheral surface is closed by a side plate 26. . The upper surface of the beam 11 is closed by an upper plate 20a which is a part of the smoothing plate 20, and the lower surface is closed by a lower plate 23a which is a part of the smoothing plate 23. The lower plate 23a is a feature of the present invention. A drain hole 27 is provided.

As shown in FIGS. 2 and 3, the drain hole 27 forms a concave surface 29 formed by recessing the upper surface of the lower plate 23a toward the center of the plane, and is formed substantially at the center thereof. . In order to make the upper surface of the lower plate 23a a concave surface 29, it is formed by making the thickness of the peripheral portion thicker than the thickness of the smooth plate 23 in other parts of the deck board and gradually reducing the thickness toward the center. do it. In this way, by forming the drainage hole 27 at the stop portion of the concave surface 29, it is possible to drain water naturally even if rainwater or the like enters due to partial damage of the spar. In addition, since the drain holes 27 need only be small holes, the strength of the pallet is not reduced. In the case of a pallet using both sides, it is preferable to provide a drain hole of the same configuration with the concave surface 29 inverted, in both the lower plate 23a and the upper plate 20a.

FIG. 4 shows a second embodiment of the present invention. Contrary to the first embodiment, the upper surface of the lower plate 23a has a convex surface 30 protruding toward the center of the plane, and a plurality of convex surfaces 30 are provided on the periphery thereof. The water drain hole 31 is formed. Lower plate 23a
In order to make the upper surface of the convex surface 30, the thickness of the peripheral portion is equal to or slightly smaller than the thickness of the smooth plate in the other parts of the deck board, and gradually increased toward the center. do it. In this way, the drain hole 3
When 1 is formed, rainwater or the like that has entered from the damaged portion of the girder can be naturally drained even if the pallet is inclined in any direction.

FIG. 5 shows a third embodiment of the present invention. As in the second embodiment, the upper surface of the lower plate 23a is formed as a convex surface 30 protruding toward the center of the plane, and the lower plate 2 of the side plate 26 is formed.
A drain hole 33 opening on the side surface is formed in a portion adjacent to 3a. When the drain holes 33 are formed in the side plate 26 as in this embodiment, it is possible to prevent intrusion of earth and sand from the drain holes even when the pallet is placed on the ground and stored. By raising and inclining one side end of the pallet, rainwater or the like accumulated in the girder can be drained at a stretch. In addition, by forming the drain holes 33 in the side plate 26, rainwater or the like that has entered the girders of the upper pallet when the pallets are stacked can be drained to the side surface of the lower pallet.

FIG. 6 shows a fourth embodiment of the present invention, in which a drain groove 35 intersecting at the center of the lower plate 23a and reaching the peripheral edge is provided, and a drain hole 3 opening into the drain groove 35 is provided.
6 is provided. When the drain groove 35 is provided as in this embodiment, the thickness of the lower plate 23a can be made constant, and the natural drainage can be performed smoothly.

In the second embodiment and the following embodiments, in a pallet used on both sides, the lower plate 23a and the upper plate 20
It is preferable that a drain hole having the same configuration is provided in a. In addition, the drain holes of the above embodiment can be used in combination with each other, and can be appropriately modified or changed. Although the structure of the reinforcing ribs inside the spar is omitted for convenience of explanation, one or several lower ends of the reinforcing ribs are cut out as shown in FIG. 3 so as not to hinder drainage depending on the structure of the reinforcing ribs. Is preferred.

[0013]

According to the synthetic resin pallet of the present invention, since drain holes are provided in the deck board forming the lower end of the girder, even if rainwater or the like enters the girder from the damaged portion, it is drained naturally. be able to. Therefore, not only can a sanitary pallet be used at all times, but also 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 enlarged sectional view of four corners.

FIG. 3 is an explanatory sectional perspective view showing a part of a spar at four corners.

FIG. 4 is an explanatory cross-sectional perspective view showing a second embodiment.

FIG. 5 is a cross-sectional perspective view for explanation showing a third embodiment.

FIG. 6 is an explanatory sectional perspective view showing a third embodiment.

[Explanation of symbols]

 Reference Signs List 10 pallet made of synthetic resin 11 girder 11a girder part 11b girder part 13 dividing line 15 upper forming member 15a upper deck board 17 lower forming member 17a lower deck board 19 fork insertion port 20 smooth plate 20a upper plate 21 reinforcing rib 22 side plate 23 smooth Plate 23a Lower plate 25 Reinforcement rib 26 Side plate 27 Drain hole 29 Concave surface 30 Convex surface 31 Drain hole 33 Drain hole 35 Drain groove 36 Drain hole

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Shizuo Tejima 2-10 Honcho, Naka-ku, Yokohama-shi, Kanagawa Prefecture Inside Parenet Co., Ltd. (72) Inventor Kunihiro Terano 1 Nobesawa, Kaisei-cho, Ashigara-gun, Kanagawa Prefecture Rubber Chemicals Headquarters Factory (72) Inventor Masahiro Samejima 1 Nobesawa, Kaisei-cho, Ashigara-gun, Kanagawa Prefecture Meiji Rubber Chemicals Headquarters Factory (72) Inventor Kei Kei Shioya 1 Nobesawa, Kaisei-cho, Ashigarashimo-gun, Kanagawa Prefecture Meiji Rubber Chemicals Co., Ltd. Inside the headquarters factory (72) Inventor Noriaki Hara 1 Nobesawa, Kaisei-cho, Ashigarashimo-gun, Kanagawa Prefecture Inside the headquarters factory of Meiji Rubber Kasei Co., Ltd. (72) Inventor Masafumi Endo 1 Nobesawa, Kaisei-cho, Ashigarakami-gun, Kanagawa Prefecture Co., Ltd. Inside

Claims (5)

[Claims] 1. A synthetic resin pallet in which an upper deck board and a lower deck board are connected via a girder and the upper and lower surfaces of the girder are closed, and a drain hole communicating with the inside of the girder of the deck board at a lower end of the girder. A pallet made of synthetic resin, characterized in that a pallet is provided. 2. The synthetic resin pallet according to claim 1, wherein a drain hole is provided in a lower plate at a girder portion of the lower deck board. 3. The synthetic resin according to claim 2, wherein the upper surface of the lower plate is formed as a concave surface gradually depressed toward the center of the plane, and a drain hole is formed substantially at the center of the concave surface. Pallets. 4. The synthetic resin according to claim 2, wherein an upper surface of the lower plate is formed as a convex surface gradually projecting toward the center of the plane, and a drain hole is formed in a peripheral portion of the lower plate. Pallets. 5. The synthetic resin pallet according to claim 1, wherein a drain hole is provided in a side plate of said lower deck board.