JP2020117239A - Resin pallet - Google Patents

Abstract

To provide a resin pallet capable of enhancing durability of a metal mold.SOLUTION: A resin pallet 10 of the present disclosure has a pair of overall height center cross ribs 30 bisecting the inside of a girder portion 15 of the center of a figure both in the longitudinal and lateral directions, and lower ribs 31 between the girders positioned on extended lines in the four-way of the pair of center cross ribs 30. Four overall height chambers surrounded by overall height walls in the girder portion 15 of the center of the figure are formed.SELECTED DRAWING: Figure 5

Description

According to the present disclosure, a deck board on which luggage is placed is supported in a floating state by girder portions arranged in the four corners of a square that is a plane shape, the centroid, and the center of each side, and the fork of a forklift truck is supported from four sides. The present invention relates to a resin pallet capable of inserting.

Generally, the girder portion of the resin pallet is provided with a girder cylinder wall having the same height as the height of the entire resin pallet. Further, as a conventional resin pallet, it is known that the girder portion of the centroid is divided into nine full-height chambers by a partition wall of a total height, and a part of each room is subdivided by a rib of a non-total height. (For example, see Patent Document 1).

JP-A-3-98854 (FIGS. 3 and 8)

However, in the mold for molding the above-mentioned conventional resin pallet, the in-girder molding projection for molding the inside of the girder portion of the center of the figure is too subdivided, which may cause a problem of deformation by resin pressure. Therefore, development of a resin pallet capable of increasing the durability of the mold is required.

In order to solve the above-mentioned problems, the invention of claim 1 is such that the deck board on which the luggage is placed is floated by the girder portions arranged at the four corners of the quadrangle, which is its planar shape, the centroid and the center of each side. In a resin pallet in which a plurality of inter-girder lower ribs are provided between the lower ends of the adjacent girders, the total height means the same height as the entire resin pallet. And a pair of center cross ribs of a total height that divides the inside of the girder portion of the centroid into two parts in the vertical and horizontal directions, and the one pair. The first cross girder lower ribs, which are the girder lower ribs located on the four extension lines of the center cross rib, are surrounded by the entire height wall in the girder portion of the centroid. It is a resin pallet that has four rooms with total height.

According to the invention of claim 2, a second inter-digit lower rib which is the four inter-digit lower ribs which is shifted to one side in the clockwise direction or the counterclockwise direction with respect to the four first inter-digit lower ribs is provided. The resin pallet according to claim 1, further comprising four connecting ribs having a non-total height extending to a position reaching the center cross rib in the girder portion of the centroid.

A third aspect of the present invention is the resin pallet according to the second aspect, wherein four full-height reinforcing ribs of total height are provided in the girder portion of the centroid to connect between the connecting ribs and the girder cylinder wall. Is.

According to a fourth aspect of the present invention, in the girder portion at the center of each side, a total height extending rib having a total height extending on an extension line of the first inter-girder lower rib is provided, and the total height extending rib and the first girder are aligned. The resin pallet according to any one of claims 1 to 3, wherein the total length of the intermediate lower rib and the center cross rib is the total length of the resin pallet.

In the resin pallet according to the first aspect, the total number of rooms in the girder portion of the centroid is four. As a result, it is possible to make the girder molding projection for forming the inside of the girder portion of the centroid of the mold thicker than the conventional one in which the total number of chambers is nine. Further, the pair of center cross ribs divides the girder portion of the centroid into equal parts in both the vertical and horizontal directions to divide into the above-mentioned four full-height chambers, so that the plurality of girder forming protrusions are uniformly thickened. be able to. These allow the durability of the mold to be increased. Moreover, since the lower ribs between the first girders are arranged on the extension lines extending from the center cross ribs in all directions, the load received by the girder portion of the centroid can be easily transmitted in all directions, and the load on the girder portion of the centroid is increased. Is alleviated.

In the resin pallet according to the second and third aspects, the space between the girder cylinder wall and the center cross rib is reinforced in a well-balanced manner, and the strength of the girder portion of the centroid becomes high.

In the resin pallet according to the fourth aspect, since the total length of the total height extending rib, the first inter-digit lower rib, and the center cross rib is the total length of the resin pallet, it is possible to suppress the bending of the entire resin pallet.

Top side perspective view of the resin pallet of the present disclosure Perspective view of the bottom side of the resin pallet Partially broken perspective view of the lower end of the girder of the centroid Partially broken perspective view of resin pallet Perspective view of top side of girder part of centroid Partially broken perspective view of resin pallet Perspective view of bottom side of centroid girder Partially broken perspective view of the girder of the centroid from below Partially broken perspective view of the girder of the centroid viewed from above Bottom side perspective view of the girder part at the center of each side Side sectional view of the non-slip member and the concave and convex engaging portion Plane cross-sectional view of mold for resin pallet molding The sectional side view of the metal mold|die in the AA cross section of FIG.

Hereinafter, the resin pallet 10 of the present embodiment will be described with reference to FIGS. 1 to 13. The deck board 11 of the resin pallet 10 of this embodiment has a quadrangular planar shape, and has girder portions 15, 16 and 17 at the centroid of the quadrangle, the four corners and the center of each side. Hereinafter, when the digit portions 15, 16 and 17 are distinguished from each other, they are referred to as "centroid digit portion 15", "corner digit portion 16" and "center digit portion 17".

As shown in FIG. 2, each of the girder portions 15, 16 and 17 has girder tubular walls 15T, 16T and 17T having the same height as the entire resin pallet 10 and projecting downward from the deck board 11. There is. Further, bridge portions 12, 13 are provided between the lower end portions of the girder portions 15, 16, 17 so that the planar shape of the lower portion of the resin pallet 10 is in the shape of "T". The forks of the forklift are inserted between the deck board 11 and the bridge portions 12 and 13 from four directions.

Each bridging part 12, 13 has a plurality of inter-girder lower ribs extending in parallel between the lower ends of the girder parts 15, 16, 17. In the lower ribs between the girders, the plate thickness direction faces the width direction of the bridging portions 12, 13, and the lower surface is flush with the lower surfaces of the girder tubular walls 15T, 16T, 17T.

Hereinafter, the bridging portion 13 extending in all directions from the girder portion 15 in the center of the figure will be described in detail. As shown in FIG. 3, each bridging portion 13 has seven inter-girder lower ribs, and the center inter-girder lower rib 31 is clockwise with respect to the girder portion 15 as viewed from above. The three inter-beam lower ribs 32L to 34L on the side and the three inter-beam lower ribs 32R to 34R on the opposite side are symmetrically arranged. Further, the center inter-girder lower rib 31 and the inter-girder lower ribs 32L and 32R on both sides thereof are connected by a strip-shaped upper surface wall 13A formed over the entire upper surfaces thereof and a plurality of orthogonal ribs 13X. (See FIG. 2). Further, the two inter-digit lower ribs 33L and 34L on both sides and the inter-digit lower ribs 33R and 34R are also connected by the strip-shaped upper wall 13B and a plurality of orthogonal ribs 13Y (FIG. 2). Connected). In addition, as shown in FIG. 4, a plurality of elongated holes are formed in the upper surface walls 13A and 13B.

In addition, as shown in FIG. 3, the girder lower ribs 31, 32L, 32R at the center and on both sides thereof have the same height, and the two girder lower ribs 33L, 33R on both sides are located at the center side. Slightly lower than the three girder lower ribs 31, 32L, 32R, and even lower than the two girder lower ribs 33L, 33R on both sides by the two girder lower ribs 34L, 34R on both sides. Has become.

As shown in FIG. 4, the bridging portion 12 between each corner and the girder portions 16 and 17 at the center of each side has seven inter-girder lower ribs, but is left with respect to the central girder lower rib. Except that the lower ribs between the girders are not symmetrically arranged and that the upper surface wall 12A is formed over the entire bridging part 12, the bridging part 13 extending from the girder part 15 of the centroid is substantially the same. It has the same shape.

A plurality of groove-shaped beams 41 are provided between the center of the deck and the girders 15 and 17 at the center of each side of the deck board 11. Each groove-shaped beam 41 has a structure in which upper ends of inter-girder upper ribs 40 extending in parallel between the girder portions 15 and 17 are connected by a ceiling wall 40A, and the ceiling wall 40A is provided with a plurality of elongated holes. There is. Further, the plurality of groove-shaped beams 41 are, for example, an even number, and the space sandwiched between the two groove-shaped beams 41 faces the central portion in the width direction of the girder portion 15.

Between the corners of the deck board 11 and the girder portions 16 and 17 at the center of each side, inter-grating lattice ribs 52 are provided. The inter-girder lattice rib 52 has a plurality of inter-girder upper ribs 52A arranged between the girder portions 16 and 17, and a plurality of orthogonal ribs 52B orthogonal to the inter-girder upper ribs 52A. Further, the upper portions of the two upper inter-girder ribs 52A extending between the girder portions 16 and 17 at the widthwise inner position of the inter-girder lattice rib 52 are connected by a ceiling wall 52C, and the ceiling wall 52C has a plurality of elongated holes. Are formed.

A lattice rib 53 is provided on a portion of the deck board 11 surrounded by a pair of inter-grating lattice ribs 52 and a pair of groove-shaped beams 41 on all sides. The lattice ribs 53 are formed by orthogonally intersecting a plurality of ribs 53A extending on the extension lines of the orthogonal ribs 52B of the pair of inter-girder lattice ribs 52.

As shown in FIG. 2, first and second full height ribs 28 and 60 are provided inside the girder portion 17 at the center of each side. The first total height rib 28 is arranged at the center of the corner portion of the girder portion 17 in the direction facing the girder portion 16 (this direction is referred to as the “lateral direction of the girder portion 17 ”), and is located at the center of the bridge portion 13 described above. It is continuous with the inter-digit lower rib 31. In addition, the first total height rib 28 extends between the inner side surfaces of the girder cylinder wall 17T in the direction facing the girder part 15 of the centroid of the girder part 17 (this direction is referred to as the "longitudinal direction of the girder part 17"). Has been done. On the other hand, the second total height ribs 60 are orthogonal to the first total height ribs 28, arranged substantially at the center in the longitudinal direction of the girder portion 17, and are arranged between the inner side surfaces of the girder cylinder wall 17T in the lateral direction of the girder portion 17. ing. Further, the second overall height rib 60 is continuous with one inter-girder upper rib 52A (see FIG. 4) of the girder inter-grating rib 52, and communicates between the ceiling wall 17G and the bottom wall 17M described below.

As shown in FIG. 4, a plurality of extension ribs 17H extended from the inter-girder upper ribs 52A of the inter-girder lattice ribs 52 are orthogonal to the first overall height ribs 28 in the upper part of the girder portion 17 at the center of each side. Be prepared for the state. A ceiling wall 17G is formed between the upper ends of the plurality of extension ribs 17H at both longitudinal end portions of the girder portion 17, and the extension ribs 17H and the second total height are provided at the longitudinal center portion of the girder portion 17. A ceiling wall 17G is formed between the upper ends of the ribs 60. A plurality of through holes are provided in those ceiling walls 17G.

In addition, as shown in FIG. 10, a plurality of extension ribs 17K extended from a plurality of inter-girder lower ribs included in the bridging portion 12 are provided in the lower portion of the girder portion 17 at the center of each side. It is prepared to be orthogonal to. A bottom wall 17M is formed between the lower end portions of the extension ribs 17K and between the extension ribs 17K and the second overall height ribs 60 at positions where they do not vertically overlap the ceiling wall 17G.

As shown in FIG. 1, inside the girder portion 16 at each corner, a total height rib 16Z is provided. The total height rib 16Z is provided between a pair of diagonals of the girder cylinder wall 16T, and divides the girder cylinder wall 16T into two equal parts. Further, a plurality of extension ribs 16H extending from the inter-girder upper ribs 52A of the inter-girder lattice ribs 52 extend from the girder cylinder wall 16T to the total height ribs 16Z in the upper portion of the girder portion 16 of each corner portion. Then, on the extension of the three ceiling walls 17G of the girder portion 17 at the center of each side, a ceiling wall 16G is formed between the upper ends of the plurality of extension ribs 16H, and a plurality of through holes are provided in these ceiling walls 16G. Has been.

In addition, as shown in FIG. 2, a plurality of extension ribs 16K extended from a plurality of inter-girder lower ribs included in the bridging portion 12 are provided below the girder portion 16 of each corner portion from the girder tubular wall 16T. It extends to the full height rib 16Z. A bottom wall 16M is formed between the lower ends of the extension ribs 16K at a position where the ceiling wall 16G does not vertically overlap.

Next, the internal structure of the girder portion 15 of the centroid will be described in detail. As shown in FIG. 5, a pair of center cross ribs 30 having a total height orthogonal to each other in the girder cylinder wall 15T are provided in the girder part 15 of the centroid. The pair of center cross ribs 30 are arranged in a position that bisects the inside of the girder cylinder wall 15T in both the first horizontal direction and the second horizontal direction orthogonal to the first horizontal direction (that is, both vertical and horizontal directions). As shown in FIG. 6, the inter-beam lower rib 31 and the first total height rib 28 are continuous. That is, in the present embodiment, the inter-digit lower rib 31 corresponds to the “first inter-digit lower rib” in the claims. The total length of the center cross rib 30, the pair of inter-girder lower ribs 31, and the pair of first total height ribs 28 is the total length of the resin pallet 10.

As shown in FIG. 5, four upper connecting ribs 29 are provided above the girder portion 15 in the center of the figure between the girder tubular wall 15T and the center cross rib 30. Here, when the pair of center cross ribs 30 is regarded as four center cross ribs 30 centered on the intersections, the four upper connecting ribs 29 form a pair with the four center cross ribs 30, respectively. The upper connecting ribs 29 are arranged in parallel with the center cross ribs 30 and are arranged at positions counterclockwise with respect to the pair of center cross ribs 30 as viewed from above. ing. The upper part of the pair of upper connecting ribs 29 and the center cross ribs 30 are connected by the ceiling wall 39. Further, the ceiling wall 39 is continuous with the ceiling wall 40A of the channel beam 41 that is closest to the center cross rib 30, and one inter-beam upper rib 40 and the upper connecting rib 29 of the channel beam 41 are continuous. .. The ceiling wall 39 is formed with a plurality of quadrangular through holes.

As shown in FIG. 7, four bottom walls 38 are provided at the lower end of the girder portion 15 in the center of the drawing. Each bottom wall 38 is arranged so as to cover the entire portion of the girder portion 15 which is divided into four equal parts by the pair of center cross ribs 30 and which does not overlap the ceiling wall 39 in the vertical direction. A plurality of circular through holes are formed in the bottom wall 38.

As shown in FIG. 9, the connecting rib 35 stands up from the edge of the bottom wall 38 adjacent to the ceiling wall 39 when viewed from above. As shown in FIG. 8, the connecting rib 35 is formed by extending the inter-girder lower rib 33R of the bridging portion 13 to a position where it reaches the center cross rib 30 in the girder portion 15 of the centroid. That is, in the present embodiment, the inter-digit lower rib 33R corresponds to the "second inter-digit lower rib" in the claims.

As shown in FIG. 9, one side of the connecting rib 35 facing the center cross rib 30 and one side of the upper connecting rib 29 at the edge of the ceiling wall 39 above the connecting rib 35 facing the girder cylinder wall 15T. , Are arranged in the same plane. Further, as shown in FIG. 8, a vertical rib 37, which is connected to one end of the connecting rib 35 and extends in the up-down direction, projects from the inner side surface of the girder cylinder wall 15T, and the upper end of the vertical rib 37 is an upper part. The connecting ribs 29 are connected so as to overlap one side surface.

As shown in FIG. 9, between the connecting ribs 35 and the girder cylinder wall 15T facing the connecting ribs 35, a total height reinforcing rib 36 having a total height is provided and stands upright from the bottom wall 38. Further, the tip end surface of the overall height reinforcing rib 36, which is separated from the girder cylinder wall 15T, is arranged flush with one side surface of the connecting rib 35, and the upper portion of the tip end surface of the overall height reinforcing rib 36 is connected to the upper connecting rib 29. ing. Further, as shown in FIG. 8, the full height reinforcing rib 36 is continuous with the inter-beam lower rib 33L of the bridge portion 13.

As shown in FIGS. 1 and 2, a plurality of anti-slip members 80 are attached to both upper and lower surfaces of the resin pallet 10 and the lower surface of the deck board 11. The non-slip member 80 is made of a soft resin such as an elastomer and has an annular shape, and as shown in FIG. 10, is fitted and mounted inside a cylindrical portion 83 integrally formed with the resin wall of the resin pallet 10. .. A tool insertion groove 84 for inserting a tool or the like when the antiskid member 80 is taken out of the cylindrical portion 83 is formed at two locations on the inner peripheral surface of the cylindrical portion 83.

Further, as shown in FIG. 11, a part of the anti-slip member 80 slightly projects from the outer surface of the resin pallet 10, and the projecting portion (hereinafter, referred to as “outer-side projecting portion of the anti-slip member 80”) is It has a shape having a central hole 81 in the center of the truncated cone. The anti-slip member 80 frictionally engages the luggage, the floor surface, the fork of the forklift, and the like, and plays a role of anti-slip.

Also, as shown in FIG. 1, the cylindrical portion 83 may be integrally formed on the upper portions of the full-height ribs 16Z and 28, and the central portion of the cylindrical portion 83 may be directly above the full-height ribs 16Z and 28. positioned. The anti-slip engagement portion 90 shown in FIG. 10 is formed at the lower end portion directly below the full height ribs 16Z and 28 with respect to the cylindrical portion 83. The anti-slip engagement portion 90 corresponds to the side cross-sectional shape of the portion of the anti-slip member 80 that protrudes from the upper surface of the first overall height rib 28, and has the overall height ribs 16Z, 28 (the first overall height rib 16 in FIG. 10). (Only 28 is shown), and a trapezoidal recess 92 that is slightly recessed upward from the lower surface and extends in the longitudinal direction of the lower surface of the first height rib 28, and projects downward from the center of the recess 92 in the longitudinal direction. And a trapezoidal central protrusion 91. Then, when the resin pallets 10 are stacked, the total height ribs 16Z, 28 (only the first total height rib 28 is shown in FIG. 11) of the lower resin pallet 10 are slidable as shown in FIG. The outer protruding portion of the stopper member 80 is received in the concave portion 92 of the non-slip engagement portion 90 of the resin pallet 10 on the upper stage side, and the central projection 91 of the anti-slip engagement portion 90 is formed in the central hole of the anti-slip member 80. By engaging with 81, the lateral displacement of the stacked resin pallets 10 can be prevented.

The above is the description regarding the configuration of the resin pallets 10 of the present embodiment. In the present embodiment, the inter-digit lower rib 31 is the "first inter-digit upper rib" in the claims, and the inter-digit lower rib 33R is the "second inter-digit upper rib" in the claims. 1 total height rib 28 is equivalent to the "total height extension rib" of a claim.

Next, the function and effect of the resin pallet 10 of this embodiment will be described. In the resin pallet 10 of the present embodiment, in the girder portion 15 in the center of the figure, the total number of rooms surrounded by the entire height wall on all sides is four. As a result, it is possible to make the girder in-mold forming projection of the mold for forming the inside of the girder portion of the centroid thicker than the conventional one in which the total number of chambers is nine.

Specifically, FIGS. 12 and 13 show a mold 70 for molding the resin pallets 10 together. The mold 70 includes an upper mold 71 and a lower mold 72 that open and close in the vertical direction, and four slide molds 73 that are inserted between the upper mold 71 and the lower mold 72 from four sides. Then, the chambers inside the girder portion 15 of the centroid are molded by the in-girder molding protrusions (not shown) protruding from the upper mold 71 and the lower mold 72.

Here, as shown in FIG. 5, eight upper end openings 15N surrounded by ribs are provided at the upper end of the girder portion 15 in the center of the figure, so that the upper die 71 is formed in order to form them. Eight in-girder forming protrusions are provided. Further, as shown in FIG. 7, the lower end of the girder portion 15 in the center of the figure is provided with four lower end openings 15M surrounded by ribs. Two in-girder molding protrusions are provided. Further, since the small rooms formed by further partitioning the four height chambers are communicated with each other in the height chambers, when molding the resin pallet 10, the side surface of the girder molding protrusion of the upper mold 71 and the lower mold 72 are formed. The side surface of the in-girder molding protrusion abuts each other to reinforce. That is, when the resin pallet 10 is molded, the in-girder molding protrusions that mold the inside of the girder portion 15 of the centroid become four blocks corresponding to the four height chambers, and the inside of the girder that molds the girder portion of the centroid is formed. The block is larger than the conventional one in which the molding protrusion has nine blocks corresponding to nine full-height rooms. Moreover, since the pair of center cross ribs 30 divides the girder portion 15 of the centroid into two equal parts in both vertical and horizontal directions and divides them equally into four rooms of total height, the block is uniformly larger than the conventional one. Become. As a result, according to the resin pallet 10 of this embodiment, the durability of the mold 70 for molding it is improved.

Further, in the resin pallet 10 of the present embodiment, as shown in FIG. 8, the center inter-girder lower rib 31 of the bridging portion 13 is arranged on the extension line extending from the center cross rib 30 in all directions. The load received by the girder portion 15 is easily transmitted in all directions, and the load on the girder portion 15 in the centroid is alleviated. Moreover, as shown in FIG. 6, the total length of the first total height rib 28, the inter-girder lower rib 31 and the center cross rib 30 in the girder portion 17 at the center of each side is the total length of the resin pallet 10. Therefore, the bending of the entire resin pallet 10 can be suppressed. Furthermore, as shown in FIG. 9, since the girder cylinder wall 15T and the center cross rib 30 are connected by the connecting ribs 35, the total height reinforcing ribs 36, the upper connecting ribs 29, etc., the girder portion of the centroid. 15 is reinforced with good balance.

[Other Embodiments]
(1) In the resin pallet 10 of the above embodiment, a rib that is continuous with the center cross rib 30 and the first total height rib 28 may be provided between the centroid and the upper ends of the girders 15 and 17 at the center of each side. Good. Specifically, the girder upper ribs 40 included in some of the grooved beams 41 may be connected to the center cross ribs 30 and the first total height ribs 28, or the two grooved beams 41 closer to the center, Between 41, a girder upper rib continuous with the center cross rib 30 and the first total height rib 28 may be newly provided.

(2) Although the deck board 11 of the resin pallet 10 of the above embodiment has a square planar shape, it may have a rectangular shape.

(3) Lattice-shaped ribs may be provided in the portion of the lower surface of the resin pallet 10 of the above embodiment surrounded by the bridge portions 12 and 13.

10 Resin Pallet 11 Deck Board 15, 16, 17 Girder Section 15T, 16T, 17T Girder Cylinder Wall 28 First Height Rib (Height Extension Rib)
30 Center cross rib 31 Lower rib between digits (Lower rib between 1st digit)
33R Lower rib between girders (lower rib between second girders)
35 Connection Rib 36 Height Reinforcement Rib 53A Extension Rib

Claims (4)

The deck board on which luggage is placed is supported in a floating state by the girders arranged at the four corners of the plane shape of the quadrangle, the centroid, and the center of each side, and the lower ends of the adjacent girders are supported. In a resin pallet in which multiple lower ribs between girders are placed between each other,
A girder cylinder wall forming a side part of each girder part, in the form of a square cylinder having the same height as the height of the entire resin pallet,
A pair of center cross ribs having a total height that divides the girder portion of the centroid into two equal parts in both vertical and horizontal directions;
Four first girder lower ribs which are the girder lower ribs located on four extension lines of the pair of center cross ribs,
A resin pallet in which the total number of rooms surrounded by a wall of total height is four in the girder portion of the centroid. The second inter-digit lower ribs, which are the four inter-digit lower ribs, which are shifted to the one side in the clockwise or counterclockwise direction with respect to the four first inter-digit lower ribs, are provided in the girder portion of the centroid. The resin pallet according to claim 1, further comprising four connecting ribs each having a non-total height and extending to a position reaching the center cross rib. The resin pallet according to claim 2, wherein the girder portion of the centroid is provided with four total height reinforcing ribs that connect the connection ribs and the girder cylinder wall. Within the girder portion at the center of each side, there is provided a total height extension rib of an entire height extending on an extension line of the first inter-digit girder lower rib,
The total length of the total height extension ribs, the first inter-digit lower ribs, and the center cross ribs aligned in a straight line is the total length of the resin pallet. Resin pallet.

Images