JPH0339904B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention is lightweight despite its large carrying load;
In order to achieve superior corrosion resistance and durability,
At least the deck on the loading surface side is made up of synthetic resin strips covering the reinforcing hard rods arranged vertically and vertically and a group of reinforcing ribs made of synthetic resin alone. This invention relates to a pallet whose deck surface is made of synthetic resin.

Specifically, since the entire loading surface of the deck is made of a highly slippery resin, as in the case of the above-mentioned structure, it is easy to cause the load to collapse or unload due to the load slipping during forkling while loaded or during cargo handling operations such as transportation. In order to effectively prevent such inconveniences, the present invention relates to a synthetic resin pallet in which linear grooves are formed in the deck and an anti-slip elastic member is fitted and held in the grooves.

The pallet using the linear anti-slip elastic member as described above was developed earlier by the present applicant, and the pallet having the construction of this earlier application has the following advantages.

In other words, the previous anti-slip structure of pallets was a collection of dots in which elastic members with relatively small volumes and areas, such as cylindrical shapes, were fitted and held in a scattered manner at multiple locations on the loading surface of the deck. However, if the loading surface is extremely slippery, such as a plastic box, a sufficient anti-slip effect cannot be obtained, and therefore the use of the pallet is naturally limited. However, in the earlier application mentioned above, since the anti-slip elastic member is linear, the contact area of the loaded load with the elastic member can be sufficiently large, and the applied load can be dispersed to improve elasticity. Combined with the fact that the downward deflection of the parts is reduced and almost uniform friction is exerted over the entire large contact area,
As a whole, an extremely reliable and strong anti-slip effect can be expected, and early fatigue of the elastic member can be suppressed to improve durability. Furthermore, by forming grooves in the deck into which the anti-slip elastic member is fitted and held, the amount of resin can be reduced without reducing the load supporting area. In order to obtain the same anti-slip surface area as compared to other products, a simple mold is required, and the elastic member can be easily fitted, which has the advantage of reducing overall manufacturing costs. are doing.

The present invention provides a pallet using a linear anti-slip elastic member having the above-mentioned advantages, so that the anti-slip elastic member can be fitted and held on a deck in a strong state of preventing extraction without causing an increase in cost. It has a purpose in making things happen.

The characteristic structure of the synthetic resin pallet according to the present invention, which was taken to achieve the above object, is that it corresponds to at least a plurality of locations in the longitudinal direction of the grooved groove in the center portion in the groove width direction, as well as those of the elastic member. A protrusion and an open space that fit into each other are formed at the locations where the elastic member is pushed into the groove, and the outer surface of the protrusion and the inner surface of the groove opposing the protrusion are formed so that when the elastic member is pushed into the groove and fitted, The groove is formed into a sloped surface that is elastically deformed outward in the width direction of the groove as it approaches the tip of the push-in, and connecting protrusions extending between the opposing inner surfaces are formed at a plurality of locations in the longitudinal direction of the groove, and A notch is formed on the lower surface of the elastic member to fit into the protruding piece, and the effects of the present invention having such a characteristic structure are as follows.

That is, when the linear anti-slip elastic member is pushed into the concave groove and fitted, the projection enters the open space, so that at least a plurality of locations in the longitudinal direction of the elastic member are expanded; Due to the elastic repulsion action of the elastic member, the outer surface of the elastic member comes into strong elastic contact with the inner surface of the groove, and the closer to the tip of the push-in, the more strongly the elastic member comes into close contact with the inner surface. In this way, it is possible to create a complex retaining structure that mutually engages the groove bottoms with a simple operation such as push-fitting the elastic member without the need for applying adhesive or the like. Without,
With an extremely simple improvement of forming the outer surface of the protrusion and the inner surface of the groove facing thereto into a sloped surface,
The effect of preventing the elastic member from being pulled out against the deck can be made extremely large, and by fitting the connecting protrusion of the groove into the notch of the elastic member, the elastic member can be moved in the longitudinal direction of the elastic member. Even if a load is applied to the elastic member, the elastic member is prevented from moving and deforming in its longitudinal direction, and as a result, the fit state of the elastic member in the groove can be properly maintained. This further enhances the effect of preventing the member from being pulled out from the deck. Therefore, it has become possible to provide a pallet with high anti-slip effect and long-lasting effect while being advantageous in terms of manufacturing and processing and cost.

Hereinafter, embodiments of the present invention will be described in detail based on the drawings. In FIGS. 1 to 3, 1 is a loading deck, which has 5 decks in the vertical direction and 7 decks in the horizontal direction. Reinforcing hard rod-shaped bodies such as carbon steel pipes for mechanical structures, which are arranged in a vertical positional relationship such that the vertical ones are placed at equal intervals, and are integrally joined by welding means at each intersection. Synthetic resin strips 3, 3' made of high-density polyethylene or the like are covered with injection molding means so that the top surfaces of the synthetic resin strips 2, 2' are flush with each other, and the synthetic resin strips 3, 3' are integrated with each other. The reinforcing rib group 4 is made of synthetic resin and is shaped like a bias mesh in plan view and approximately T-shaped in longitudinal section.

Of the hard rod-like bodies 2 and 2', seven hard rod-like bodies 2' located in the lower position in the horizontal direction include two hard rod-like bodies 2' located at both ends in the direction of juxtaposition, and a total of four at intervals of one. As clearly shown in FIGS. 4 and 5, a linear concave groove 6 is formed in a portion of the resin strip 3' directly above the hard rod 2', partitioned by the hard rod 2 in the vertical direction. is formed during injection molding, and within this concave groove 6, an anti-slip elastic member 5 made of hard synthetic rubber or the like in a linear shape is placed on its upper surface 5.
The deck 1 is fitted and held in such a way that it slightly protrudes from the loading surface of the deck 1, and its fitting and holding structure is as follows.

As clearly shown in FIGS. 4 to 6 A and B, there are multiple locations (four locations in the drawing) at approximately equal intervals in the longitudinal direction including both ends of the groove width in the center of the grooved groove 6. (It is fine if it is shown in two or more places.)
A substantially cylindrical shape having a central hole 6d for insertion (extraction) of a location pin for holding the hard rod-like bodies 2, 2' in a fixed position in the mold cavity during resin coating molding. The protrusions 6A are integrally formed to protrude, and the protrusions 6A are integrally formed to protrude.
Connecting protrusions 6c for preventing the groove width from expanding and deforming are integrally formed at a plurality of locations in the longitudinal direction of the concave grooves 6 located between adjacent grooves A, extending between the opposing inner surfaces in the groove width direction. On the other hand, open spaces 5A having bottomed cylindrical circumferential walls 5e that can be elastically fitted to the projections 6A are formed at a plurality of locations of the elastic member 5 corresponding to the projections 6A in a state that opens only downward. At the same time, recesses are provided at a plurality of locations on the lower surface of the elastic member 5 corresponding to the connecting protrusions 6c to improve prevention of slippage by fitting into the connecting protrusions 6c while penetrating in the width direction. A notch 5c is formed that helps increase the contact area with the groove 6. As shown in FIG. 7 A and B, the groove 6
The inner surface 6b of the projection 6A and the outer peripheral surface 6a of the protrusion 6A are each formed with a slight slope that gradually becomes wider and larger in diameter toward the bottom, and the outer peripheral surface 6a of the projection 6A has a slightly larger slope. Along with being there,
The bottomed cylindrical peripheral wall 5e forming the open space 5A on the side of the elastic member 5 has a wall thickness (T) that is uniform over the entire vertical width and is slightly larger than the groove width (t) at a position corresponding to the upper end of the projection 6A. The other elastic member 5 is formed into a tapered shape with a slope slightly smaller than the slope of the inner surface 6b of the groove 6, so that the elastic member 5 can be inserted into the groove 6. By pushing and fitting together, the bottomed cylindrical peripheral wall 5e is elastically deformed outwardly by the protrusion 6A toward the tip of the push-in, and the other portion is deformed more strongly toward the tip by the sloped inner surface 6b. The elastic member 5 is fitted and held in the concave groove 6 in a state in which the elastic member 5 is in tight elastic contact with the groove 6 and is strongly prevented from being pulled out.

The two decks 1, 1 having the same specifications as described above are placed in an inverted position, and the girder portions 7, 7 formed integrally protruding from the periphery, corners, and center of each deck 1, 1 are heated in abutting state. By welding and joining, a four-sided pallet with fork insertion ports 8 provided on each of the four sides is constructed.

Reference numeral 9 in the figure is a fork anti-slip device formed at a suitable location on the reinforcing rib group constituting the deck 1;
0 is a cylindrical anti-slip elastic member that is fitted and held in the square portion of the deck 1.

Note that the pallet to which the present invention is directed is not limited to one that can be used on both sides as shown in the above embodiment, but may be one that can be used on one side, and the reinforcing rib group 4 may have any shape. good.

[Brief explanation of drawings]

The drawings show an embodiment of a synthetic resin pallet according to the present invention, in which FIG. 1 is a partially cutaway plan view, FIG. 2 is a side view, and FIG. 3 is an enlarged longitudinal sectional view taken along the line of FIG. Figure 4 is an enlarged plan view of the main parts, Figure 5 is a longitudinal sectional view taken along the line shown in Figure 4, and Figures 6 A and 6 are Figure 5.
FIGS. 7A and 7B are a vertical sectional view taken along a line in FIG. 5 and an exploded view thereof. 1...Deck, 2, 2'...Hard rod-shaped body, 3,
3'...Synthetic resin strip, 4...Reinforcement rib group, 5...
...Anti-slip elastic member, 6...Concave groove, 6A...Protrusion, 5A...Open space, 6a...Outer surface of 6A, 6
b...Inner surface of 6, 6c...Connecting protrusion, 5c...Notch.

Claims (1)

[Scope of Claims] 1 A synthetic resin pallet in which a linear groove 6 is formed in the deck 1, and a linear anti-slip elastic member 5 is fitted and held in the groove 6. , protrusions 6A that fit into at least a plurality of locations in the longitudinal direction of the groove width direction central portion of the concave groove 6 and the corresponding locations of the elastic member 5;
Open spaces 5A are formed in each of the outer surfaces 6a of the protrusions 6A and the inner surfaces 6b of the grooves 6 facing thereto.
is formed into a sloped surface such that when the elastic member 5 is pushed into the concave groove 6, the tip thereof is gradually elastically deformed outward in the width direction of the groove,
Connecting protrusions 6c extending between the opposing inner surfaces are formed at a plurality of locations in the longitudinal direction of the groove 6, and a notch 5c that fits into the connecting protrusions 6c is formed on the lower surface side of the elastic member 5. Synthetic resin pallet. 2. The deck 1 consists of synthetic resin strips 3, 3' covering reinforcing hard rods 2, 2' which are vertically and horizontally arranged vertically and vertically, and synthetic resin strips 3, 3' made of synthetic resin alone. The linear concave groove 6 is formed of a group of reinforcing ribs 4, and the linear concave groove 6 is formed of a resin at a portion directly above the lower hard rod-shaped body 2' of the synthetic resin strips 3, 3'. A synthetic resin pallet according to claim 1, which is formed in the strip 3' portion. 3. The synthetic resin pallet according to claim 1, wherein the projections 6A are formed in a cylindrical shape at a plurality of locations including both ends of the groove 6 in the longitudinal direction.