JP5161733B2 - Pallet forming member made of synthetic resin - Google Patents

Description

The present invention relates to a synthetic resin pallet forming member that can be suitably used for a synthetic resin pallet that is used to place various articles on a loading surface for transportation or storage.

Conventionally, as a synthetic resin pallet used when carrying or storing an article, there are a two-way pallet and a four-way pallet having a large number of reinforcing ribs and a plurality of legs. Also, in such a synthetic resin pallet, a synthetic resin pallet forming member in which a plurality of reinforcing ribs and an upper deck board and a lower deck board constituting a plurality of girders are bonded together, There is also a so-called skid pallet composed of a synthetic resin pallet forming member having only leg portions (girder portions).

For example, in the synthetic resin pallet described in Patent Document 1, gas is injected by a gas injection method into the thickest part near the intersection of the deck board and the reinforcing rib at the substantially center part of the deck board. In some cases, a hollow portion is formed in a reinforcing rib or the like to reduce the weight. In this synthetic resin pallet, since the gas is injected from the substantially central portion, relatively many reinforcing ribs having a hollow portion in the central region and relatively many reinforcing ribs having a solid portion in the outer peripheral region are formed. The average bulk density of the outer peripheral region is made larger than the average bulk density of the central region.
Japanese Patent No. 3443318

However, in this synthetic resin pallet, since gas is injected from the substantially central portion, there are many reinforcing ribs having a hollow portion in the central region, and further improvement in creep resistance of the synthetic resin pallet is required. .

In view of such circumstances, an object of the present invention is to provide a synthetic resin pallet forming member having improved creep resistance while maintaining the weight reduction of the synthetic resin pallet.

That is, the present invention provides a synthetic resin pallet forming member having a substantially polygonal shape in plan view formed by injection molding, wherein the synthetic resin pallet forming member is composed of a plate-shaped portion, a plurality of girder components, and a plurality of reinforcing ribs. A plurality of girder components and a plurality of reinforcing ribs are formed on one surface of the plate-like portion, and the shape is similar to a substantially polygonal shape in plan view of the synthetic resin pallet forming member, except for a central region having an area ratio of 1/25 on at least one side of the area, possess an even number of gas gate in plan view substantially point symmetrical positions, each of said even number of the gas gate is provided on the reinforcing rib in Sumiketa components positioned in a corner, the there is provided a synthetic resin pallet member, wherein Rukoto include solid ribs the portion included in the central region of the plurality of reinforcing ribs.

According to the synthetic resin pallet forming member of the present invention, the synthetic resin pallet forming member has a shape similar to the substantially polygonal shape in plan view and has an area ratio of 1/25 at least on one side of the region other than the central region. Since gas is injected from an even number of gas gates provided at point symmetry positions, when the gas flows from the outer peripheral region to the central region, the gas flow is interrupted in the vicinity of the girder components located in the central region, When the channel ends face each other, the vicinity of the central region has a solid structure, and the creep resistance can be improved. In addition, the overall weight of the synthetic resin pallet forming member can be reduced by the presence of the reinforcing ribs in the hollow portion.

In the synthetic resin pallet forming member according to the embodiment of the present invention, the planar shape of the synthetic resin pallet forming member is substantially the same as the polygonal shape of the synthetic resin pallet forming member, and at least on one side of the region other than the central region with an area ratio of 1/25. By providing an even number of gas gates at point-symmetric positions, gas flows from the outer peripheral side other than the central region toward the central region. In the central region of the synthetic resin pallet forming member, which is similar to the polygonal shape in plan view and has an area ratio of 1/25, there is usually a girder component, but the gas flow is blocked in the vicinity of this central region. When the gas flow path ends face each other, the blocked part and the vicinity of the gas flow path ends face each other have a solid structure. Therefore, if a gas gate is provided in a region other than the central region, when this synthetic resin pallet forming member is used as a synthetic resin pallet, the load is concentrated near the central region when a load is loaded. However, since there is a solid structure portion in the vicinity of the girder component in the central region, the creep resistance as a synthetic resin pallet can be improved. The resin gate may be a one-point resin gate provided at one point in the center, or may be a multi-point resin gate provided at an even number of positions substantially symmetrical with respect to a plan view.

The presence of a solid part in the peripheral wall part of the girder component including the central region further improves the creep resistance. Therefore, the center of the synthetic resin pallet forming member is similar to the polygonal shape in plan view and has an area ratio of 1/16. It is preferable to provide an even number of gas gates at a substantially point-symmetrical position in plan view on at least one side of a region other than the region, more preferably a region other than the central region having an area ratio of 1/9, and an area ratio of 1/4. A region other than the central region is particularly preferable. Depending on the size of this area ratio, the position where the solid part is formed moves from the central part toward the outer peripheral direction of the central area, and more solid part is formed near the peripheral wall part of the central girder component. Will be.

Moreover, as a plane point approximate point-symmetrical position with respect to the center of the synthetic resin pallet forming member, it can be a position on a diagonal line, a horizontal line passing through the center, or a vertical line. Here, as the substantially point-symmetrical position, it is preferable that it is perfectly point-symmetric in consideration of the balance of the gas flow, but the gas flow does not change extremely even if there is a slight deviation. It is known that the slight deviation in this case is about ± 10 °. Therefore, it is an allowable position up to a deviation of about ± 10 °.

Further, in order to further improve the creep resistance as a synthetic resin pallet, it is preferable to have a solid rib in the central region or in the vicinity thereof. In order to form the solid rib, a reinforcing rib serving as a gas flow path may be formed intermittently in the spar constituting portion located in the central region. In the intermittent reinforcing rib, the gas flow is blocked at the end, so that the solid rib can be formed without gas passing through.

It is also preferable to provide a gas gate so that at least one surface of the synthetic resin pallet forming member is substantially equidistant from the surface adjacent to the one surface. The gas flows through the thick resin part, but the gas is supplied from a gas gate provided so as to be approximately equidistant from one surface of the synthetic resin pallet forming member and the surface adjacent to this one surface. By injecting, the gas flow channel ends face each other at the corner portion, and the vicinity of the facing portion becomes a solid structure, and the strength of the corner portion of the synthetic resin pallet is improved. Therefore, even if the claw of the forklift collides with the corner portion of the synthetic resin pallet, the corner portion can be prevented from being damaged.

Hereinafter, the synthetic resin pallet forming member of the present invention will be described with reference to FIGS. 1 is a plan view of a synthetic resin pallet forming member according to an embodiment, FIG. 2 is a side view of the synthetic resin pallet forming member shown in FIG. 4 is a rear view of the pallet forming member, FIG. 4 is a schematic view showing a state where a portion where the gas flow is blocked becomes a solid portion, and FIG. 5 is a schematic view showing a state where gas flow channel ends face each other. 6 is a schematic diagram showing an allowable range in which the gas gate is provided at a substantially point-symmetrical position in plan view, FIG. 7 is a schematic diagram showing the state of the hollow portion and the solid portion in the vicinity of the intermittent reinforcing rib, and FIG. 8 is substantially equidistant from the corner portion. FIG. 9 is a schematic diagram showing a state in which gas flow path ends at the corners face each other, FIG. 10 is a plan view of a synthetic resin pallet forming member according to another embodiment, and FIG. Is the B arrow line of the synthetic resin pallet forming member shown in FIG. See side view, FIG. 12 is a rear view of the synthetic resin pallet forming member shown in FIG. 10.

As shown in FIG. 1, the synthetic resin pallet forming member 1 as a whole has a substantially square shape in plan view, for example, a substantially rectangular shape or a substantially square shape. The synthetic resin pallet forming member 1 for two-way insertion shown in FIG. 3 includes a plate-like portion 2, a plurality of girders constituting portions 3, and a plurality of reinforcing ribs 4. A plurality of cylindrical girder components 3 and a plurality of reinforcing ribs 4 are formed. In addition, the girder structure part 3 is made into the end girder structure parts 3a and 3a located in the end, and the center girder structure part 3b.

The synthetic resin pallet forming member 1 having a substantially rectangular shape in a plan view for two-way insertion will be described. The shape is similar to the substantially rectangular shape in a plan view, and an even number is provided in a region other than the central region 5 having an area ratio of 1/4. The gas gate 6 is provided. Note that a part of the central region 5 and a part of the region of the central girder configuration part 3b overlap. The gas gate 6 is provided on at least one side of the plate-like portion 2. For example, when the gas gate 6 is provided on the surface side 2 a, the gas gate 6 is disposed on the flat portion of the plate-like portion 2. The gas flows through the thick resin portion, that is, the root portion of the plate-like portion 2 and the reinforcing rib 4 and the root portion of the peripheral portion 3aa of the plate-like portion 2 and the end-girder component 3a. It is preferable to provide at the position corresponding to the position where the peripheral wall portion 3aa of the end beam constituting portion 3a provided on the back surface side 2b and the reinforcing rib 4 are formed. Moreover, when providing in the back surface side 2b of the plate-shaped part 2, it is preferable to provide the gas gate 6 in the position where the surrounding wall part 3aa of the end beam structure part 3a and the reinforcement rib 4 are formed (refer FIG. 3).

The synthetic resin pallet forming member 1 is formed by injection molding of a resin, but since the gas is injected from the gas gate 6 before the resin is cooled and solidified, it travels through a molten portion that is not solidified in the resin. Will flow. Accordingly, the gas flows through the thick resin portion, but by providing an even number of gas gates 6 at the plane view symmetrical positions other than the central region 5, the outer periphery of the synthetic resin pallet forming member 1 is provided. The gas can flow almost uniformly from the side toward the central region 5.

For example, when two gas gates 6 are provided, they are provided at the corner 7 at the plane view symmetrical position, the short side intermediate position 8 at the plane view symmetrical position, or the long side intermediate position 9 at the plane view symmetrical position. be able to. In addition, in order to make many solid parts exist in the center area | region 5 vicinity, it is preferable to provide in the intermediate position 8 of the short side of a planar view substantially rectangular shape. Considering the gas flow, the gas flows uniformly from the gas gate 6 provided at the intermediate position 8 on the short side and the gas is blocked in the vicinity of the central region 5, or the ends of the gas flow paths face each other. This is because there are many solid parts.

Further, when four gas gates 6 are provided at symmetrical positions in a plane view, it is preferable to provide the gas gates 6 at the corners 7. In this case, since the gas flows from the four corners toward the central region 5, the gas flowing from various places in the vicinity of the central region 5 is blocked or the ends of the gas flow paths face each other. This is because many solid portions are formed at the positions (see FIGS. 4 and 5).

Moreover, as a plane point approximate point-symmetrical position with respect to the center of the synthetic resin pallet forming member, it can be a position on a diagonal line, a horizontal line passing through the center, or a vertical line. Here, as the substantially point-symmetrical position, it is preferable that it is perfectly point-symmetrical in consideration of the balance of gas flow, but the gas flows through the thick resin part, so there is a slight deviation. Even if there is, gas flow will not change drastically. It is known that the slight deviation in this case is about ± 10 °. Therefore, it is an allowable position up to a deviation of about ± 10 ° (see FIG. 6).

Further, in order to further improve the creep property as a synthetic resin pallet, it is preferable that a solid rib is present in the central region 5 or in the vicinity thereof. For example, what is necessary is just to form so that the reinforcement rib used as the flow path of gas may be intermittently formed in peripheral wall part 3ba of the center girder structure part 3b. In the intermittent reinforcing rib 4a, the gas flow is blocked at the end, so that a solid rib can be formed without gas passing through (see FIG. 7).

Further, as shown in FIG. 8, when four gas gates 6 are provided at the four corners 7 in the plane view symmetrical position, the gas also flows into the four corners 10, so that the synthetic resin pallet forming member 1 By providing the gas gate 6 so as to be substantially equidistant T from the one surface 1a and the surface 1b adjacent to one surface, the gas flow faces at the corner portion 10, and a solid portion is formed at that position. Thus, the strength of the corner portion 10 can be ensured (see FIG. 9).

Next, as another embodiment, a synthetic resin pallet forming member 21 having a substantially rectangular shape in plan view for four-way insertion will be described. In the synthetic resin pallet forming member 21 for four-way insertion shown in FIG. 10, a plurality of cylindrical girder constituting portions 33 and a plurality of reinforcing ribs 44 are formed on the surface side of the plate-like portion 22. The girder forming unit 33 includes a corner girder forming unit 33a, a central girder forming unit 33b, and an intermediate girder forming unit 33c located at the corners. Since the synthetic resin pallet forming member 21 is a member constituting the lower side of the synthetic resin pallet, an opening 12 for a pallet truck is formed, and an inclined rib for passing a wheel of the pallet truck is formed. 44b is provided. Also, as shown in FIG. 12, a back plate-like portion 23 and a plurality of reinforcing ribs 44 are formed on the back side. In addition, an even number of gas gates 6 are provided in regions other than the central region 5 having a substantially rectangular shape in plan view and an area ratio of 1/4. 12 around the reinforcing ribs 44 and the girder component 33a. A part of the central region 5 overlaps with the region of the central girder forming portion 33b. And the gas gate 6 is provided on the reinforcement rib 44 in the corner beam structure part 33a.

The gas injected from the gas gate 6 provided in the four-corner girder configuration portion 33a travels through the base portions of the plate-like portions 22 and the reinforcing ribs 44, and passes through the intermediate girder configuration portion 33c to the central girder configuration portion 33b. The gas flows to the side and the gas is blocked in the vicinity of the central girder constituting portion 33b, or the ends of the gas flow paths face each other, so that a solid portion is formed. In addition, intermittent reinforcing ribs 44a are provided in the central beam constituting portion 33b to improve the strength.

A synthetic resin pallet can be obtained by sticking the synthetic resin pallet forming members thus obtained. If the synthetic resin pallet forming members have the same shape, a double-sided synthetic resin pallet can be obtained, and if they have different shapes, a single-sided synthetic resin pallet can be obtained. Moreover, if it is a synthetic resin pallet formation member single-piece | unit, a skid pallet can also be obtained. In addition, an anti-slip tape 11 can be appropriately attached to the surface side of the synthetic resin pallet forming member 1 to prevent slipping of the luggage. When the gas gate 6 is formed on the surface side, The portion of the gas gate 6 can be sealed with the non-slip tape 11. In addition, although the said embodiment demonstrated the square-shaped synthetic resin pallet formation member, as a special thing, even if it is a planar view substantially hexagonal shape or a substantially octagonal shape, it can obtain similarly.

It is a top view of the synthetic resin pallet forming member of one embodiment of the present invention. It is the side view seen from the A arrow line of the synthetic resin pallet formation member of FIG. It is a reverse view of the synthetic resin pallet formation member of FIG. It is a schematic diagram which shows a mode that the part vicinity where the flow of gas was interrupted | blocked turns into a solid part. It is a schematic diagram which shows a mode that the flow-path end of gas faces each other. It is a schematic diagram which shows the tolerance | permissible_range which provides a gas gate in a planar point substantially point symmetrical position. It is a schematic diagram which shows the mode of the hollow part and solid part in the intermittent reinforcement rib vicinity. It is the schematic diagram which has arrange | positioned the gas gate at the substantially equal distance from the corner part. It is a schematic diagram which shows a mode that the flow-path end of gas faces in a corner part. It is a top view of the synthetic resin pallet formation member of other embodiments. It is the side view seen from the B arrow line of the synthetic resin pallet formation members of FIG. It is a reverse view of the synthetic resin pallet formation member shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Synthetic resin pallet formation member 2 Plate-shaped part 3 Girder structure part 4 Reinforcement rib 5 Central area 6 Gas gate 7 Corner part 8 Short side intermediate position 9 Long side intermediate position 10 Corner part 11 Anti-slip tape

Claims (2)

In the synthetic resin pallet forming member having a substantially polygonal shape in plan view formed by injection molding,
The pallet forming member made of synthetic resin is composed of a plate-like portion, a plurality of girder components, and a plurality of reinforcing ribs,
The plurality of girder components and the plurality of reinforcing ribs are formed on one surface of the plate-like portion,
On at least one side of the region other than the central region of the area ratio 1/25 with similar shape and plan view polygonal shape of said synthetic resin pallet member, possess an even number of gas gate in plan view substantially point symmetrical positions,
Each of the even number of gas gates is provided on the reinforcing rib in the corner beam component located at the corner,
A portion of the plurality of reinforcing ribs included in the central region includes a solid rib.
A synthetic resin pallet forming member. 2. The synthetic resin pallet forming member according to claim 1, wherein the reinforcing ribs that are intermittently formed are formed on a peripheral wall portion of the central girder component included in the central region among the plurality of girder components.

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