JPH0144425Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a forklift pallet made of synthetic resin and having a deck board formed by a blow molding method.

[Conventional technology and its problems]

Synthetic resin pallets are lighter than wooden or metal pallets and have excellent chemical resistance and moisture resistance.

By the way, a deck board constituting a pallet made of synthetic resin as a hollow box by blow molding is known, for example, in Japanese Utility Model Application No. 56-34721 (hereinafter referred to as the conventional example). but,
In this conventional example, a single large deck board is formed by combining multiple synthetic resin hollow molded members.If you try to obtain a single hollow deck board in order to avoid the trouble of such combinations, you will have to Deck boards may have low bending rigidity, so reinforcing ribs and the like is a particularly important element.

If the ribs are arranged in only one direction as in the conventional example, there is a risk that sufficient strength in the direction in which the ribs are not directed may not be obtained.

The purpose of the present invention is to eliminate the disadvantages of the conventional example and to provide a synthetic resin pallet having a single hollow deck board with ribs that can ensure uniform rigidity. be.

[Means for solving problems]

In order to achieve the above object, the present invention consists of a combination of a hollow deck board integrally formed by a hollow molding method and a support leg attached to the hollow deck board, and a plurality of first concave ribs are provided in parallel on the upper surface plate of the hollow deck board. The gist is that a plurality of second concave ribs orthogonal to the first concave ribs are provided in parallel on the bottom plate that is integrally continuous with the face plate via the side plate, and the first and second ribs are crimped at the bottom. It is something.

[Effect]

According to the present invention, since the hollow deck board and the support leg are formed separately and combined, the rib is not interrupted at the support leg part because the deck board and the support leg are integrally molded in the same mold. As a result, there is no fear that the amount of deflection of the interrupted portion of the rib will increase and deform when a supporting load is applied by a fork or the like. Moreover, the ribs are not limited to one direction, but are provided perpendicularly between the upper and lower plates of the pallet, so there is no difference in direction of rigidity, and appropriate rigidity can be obtained depending on the direction in which the forks are inserted. Not that there isn't.

〔Example〕

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

Fig. 1 is a plan view showing an embodiment of the pallet of the present invention, Fig. 2 is a top and bottom view of the same, Fig. 3 is a front view of the same,
FIG. 4 is a cross-sectional view taken along the line A--A in FIG. 1, in which reference numeral 1 indicates a deck board made of synthetic resin, and reference numeral 2 indicates a support leg that is detachably attached to the back surface of the deck board 1.

Examples of the synthetic resin forming the deck board 1 include polyolefin resins such as high density polyethylene, low density polyethylene, polypropylene, and ethylene-propylene copolymers; vinyl chloride resins such as polyvinyl chloride and polyvinylidene chloride;
Examples include styrene resins such as polystyrene, acrylonitrile-styrene copolymer, acrylonitrile-butadiene-styrene copolymer, polyamide resins, and polyester resins, but polyolefin resins, especially polyolefin resins, are preferred from the viewpoint of physical properties of pallets and economic efficiency. High density polyethylene or ethylene-propylene copolymers are preferred. Note that these resins may contain antioxidants, ultraviolet absorbers, blowing agents, dyes, pigments, and organic or inorganic fillers, if necessary.

The deck board 1 is formed by a blow molding method using such a synthetic resin, and includes an upper plate 1a and a lower plate 1.
It consists of a hollow body having a side plate 1c and a side plate 1c.
c is provided with a recess 3 for reinforcement when supporting with a fork and for hanging a robe as appropriate.

On the other hand, a plurality of first concave ribs 4 are formed in parallel to each other on the upper surface plate 1a so as to be parallel to the rectangular outer peripheral edge. The mutual spacing between the ribs 4 does not necessarily have to be uniform; wide portions are provided near the center and left and right ends of the top plate 1a, and an appropriate number of circular recesses 5 are formed therein.

Further, a plurality of second concave ribs 6 which are orthogonal to the first concave ribs 4 are formed in parallel to each other on the lower surface plate 1b, but it is not necessary that these concave ribs 6 are all equally spaced. A wide part is provided at the center of the lower plate 1b, and an appropriate number of circular recesses 5 are formed here as well.

These circular recesses 5 serve to alleviate the bending of the deck board 1 from the center along the line of the ribs 4 or 6 parallel to the outer peripheral edge thereof.

The depth ratio of these concave ribs 4 and 6 is inversely proportional to the number of ribs, and as shown in FIG. 4, the bottoms of the ribs 4 and 6 are pressed together.

Furthermore, the number of ribs 4 and 6 should be selected according to the load capacity; for applications with low load capacity, wide ribs should be installed with a reduced number, and for applications with high load capacity, wide ribs should be installed. Increase the number of narrow ones and install them.

Select the location where the inserted fork should come into contact, and install a thick sliding plate made of ethylene-propylene rubber, ethylene-vinyl acetate copolymer, or other elastic rubber material between the ribs 6 of the bottom plate 1b. The stopper sheet 7 is buried by insert molding.

FIG. 5 is a longitudinal sectional side view showing an example of joining the deck board 1 and the supporting leg 2. The supporting leg 2 is integrally provided with a bearing 8 having a through hole 9 vertically arranged in the center of a hollow cylindrical body with reinforcing ribs. is extended upward to form a protrusion 8a.
The material may be wood, metal, hardened synthetic rubber, etc. in addition to synthetic resin such as polyethylene.

On the other hand, a wide and shallow recess 10 into which the upper outer periphery 2a of the support leg 2 is inserted is formed in the bottom plate 1b of the deck board 1, and a recess 11 having substantially the same shape as the protrusion 8a is formed in the center of the recess 10. The bottom part and the bottom part of the same-shaped recess 5 of the top plate 1a of the deck board 1 are joined.

In this way, the protruding part 8a of the supporting leg 2 is moved into the recessed part 1.
1, insert the bolt 13 into the through hole 9 from the recess 5 side with the washer 15 interposed, and insert the washer 15 and spring washer 1 into the protruding part.
The double nut 14 is screwed together with the screw 6 interposed therebetween. A rubber gasket 12 is fitted into the recess 5 into which the bolt 13 is inserted to prevent slipping.

FIG. 6 is a front view showing another embodiment of the pallet of the present invention, in which the two deck boards 1 are connected by a supporting leg 2' with their lower plates 1b facing each other to form a pallet that can be used on both sides. You can also do that.

In this case, the supporting leg 2' has a shaft 8 as shown in FIG.
extends vertically, and protrusions 8a and 8a' are provided symmetrically on both sides, and the outer peripheral shape is not tapered downward like the support leg 2, but has almost the same diameter at the upper and lower ends. It shall be something like this.

Next, the usage and operation will be explained. The fork of a forklift or a handlift can be inserted into the deck board 1 from any direction, front, back, left, or right. On the other hand, since the deck board 1 on which the fork comes into contact is provided with a first concave rib 4 and a second concave rib 6 that are orthogonal to each other, no matter which direction the fork is inserted, the fork will be inserted at right angles to the fork. There are ribs that provide rigidity against bending loads.

In addition, the support leg 2 or 2' is attached with the deck board 1 so that it will not rotate with a little force due to the spring reaction force of the spring washer 16, but the claw of the fork may accidentally hit the side of the support leg 2 or 2'. In this case, the bolt 13 can be rotated as an axis to deflect the impact. Furthermore, the sheet 7 prevents this claw from slipping.

[Effect of idea]

As mentioned above, the synthetic resin pallet of the present invention has ribs perpendicular to the top and bottom plates of the hollow deck board, so the ribs are not biased in one direction, making it possible to use a fork in all directions. It can exhibit uniform strength. Further, since ribs are provided on both the top plate and the bottom plate, the arrangement of the ribs does not have to be complicated, and the structure of the mold can be relatively simple. Furthermore, since the upper and lower ribs are integrally continuous in the circumferential and longitudinal directions of the deck board, sufficient strength can be exhibited even with pallets made of synthetic resin.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an embodiment of the synthetic resin pallet of the present invention, Fig. 2 is a top and bottom view of the same, Fig. 3 is a front view of the same, Fig. 4 is a sectional view taken along line A-A in Fig. 1, Fig. 5 is a longitudinal side view showing an example of how the deck board and the supporting leg are connected, Fig. 6 is a front view showing another embodiment of the present invention, and Fig. 7 is an example of how the deck board and the supporting leg are connected in the embodiment of Fig. 6. FIG. 1...Deck board, 1a...Top plate, 1b...
...Bottom plate, 1c...Side plate, 2, 2'...Support leg, 3
... recess for hanging a rope, 4 ... first recessed rib,
5... Circular recess, 6... Second concave rib, 7... Anti-slip sheet, 8... Bearing, 8a, 8a'... Protrusion, 9... Through hole, 11... Recess, 12... ...Putskin, 13...Bolt, 14...Double nut, 15...Washer, 16...Spring washer.

Claims (1)

[Scope of utility model registration request] It consists of a hollow deck board integrally formed by a hollow molding method and a supporting leg attached to the hollow deck board, and a plurality of first concave ribs are provided in parallel on the top plate of the hollow deck board, and a bottom plate is integrally continuous with the top plate via the side plate. A synthetic resin pallet characterized in that a face plate is provided with a plurality of parallel second concave ribs perpendicular to the first concave ribs, and the first and second ribs are crimped at the bottom.