JP5261075B2 - Plastic pallet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the strength and rigidity of a horizontal plate for attaching a caster on which the caster is attached and hence to prevent corner beams by sectioning a cylindrical body, formed in each of the corner beams from being damaged, by dividing a cylindrical body in a beam formed in corner beams into upper and lower spaces by the horizontal plate for attaching the caster, by disposing the caster in the lower space, and by forming a bar in the upper space. <P>SOLUTION: A pallet made of a synthetic resin includes the four corner beams 1 disposed at corners, four intermediate beams 2 disposed between the corner beams, and one central beam 3 disposed at the central part. The cylindrical body 1b in the beam formed in each corner beam is sectioned into the upper space A1 and the lower space A1' by the horizontal plate 1c used for attaching the caster. The caster C is disposed in the lower space. The bar is formed in the upper space 4a. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to an integrally formed synthetic resin pallet used for transporting, transporting, storing and the like of luggage.

  Conventionally, as an example, Patent Document 1 discloses a synthetic resin pallet in which casters are disposed in concave portions formed at four corners of a lower deck of a synthetic resin pallet.

Utility Model Registration No. 2602474

  The conventional synthetic resin pallet described above has a problem in that the caster mounting portion is damaged because the strength of the top of the recess to which the caster base is mounted is not sufficient.

  In addition, since the load of the synthetic resin pallet including the loaded load is supported by four casters arranged at the four corners of the lower deck of the synthetic resin pallet, the central portion of the synthetic resin pallet Therefore, there is a problem in that a load is applied to the caster to move the caster to the outside, and the caster mounting portion is more easily damaged.

  An object of the present invention is to solve the problems of the above-described conventional synthetic resin pallet.

In order to achieve the above-mentioned object, the present invention provides four corner girders arranged at the corners, four intermediate girders arranged between the corner girders, and one central girder arranged at the central portion. In the synthetic resin pallet having the first structure, first, an inner cylinder body is formed in the corner girder, and the inner cylinder body has a base fitting recess in which a base of a caster can be fitted. The caster mounting horizontal plate is divided into an upper space portion and a lower space portion. In the lower space portion, casters are disposed, and at least one of the crosspieces formed in the upper space portion. A book is formed by extending a connecting beam constituting an upper connecting beam portion of a corner girder / intermediate beam into the upper space portion. together are formed over a substrate the digit in the cylinder body, the caster base The upper space portion and the lower space portion are partitioned by a caster mounting horizontal plate in which a pedestal fitting recess that can be combined is formed, and a caster is disposed in the lower space portion, and the upper space portion At least one of the crosspieces formed in (1) is formed by extending a connection crosspiece constituting the intermediate girder / center girder upper connection crosspiece portion into the upper space portion .

  In a synthetic resin pallet having four corner girders arranged at corners, four intermediate girders arranged between the corner girders, and one central girder arranged at the center, Since the formed in-girder cylindrical body is partitioned into an upper space portion and a lower space portion by a horizontal plate for installing casters, casters are disposed in the lower space portion, and a crosspiece is formed in the upper space portion. The strength and rigidity of the caster mounting horizontal plate to which the casters are mounted can be improved, and therefore the corner beams can be prevented from being damaged.

  A horizontal plate for casters to which casters are attached because the beam is formed by extending a connecting beam that constitutes a corner beam / intermediate beam upper connecting beam portion that connects the upper end portion of the corner beam and the upper end portion of the intermediate beam. The strength and rigidity of the frame can be further improved, and therefore damage to the corner beams can be reliably prevented.

  In the synthetic resin pallet having four corner girders arranged at the corners, four intermediate girders arranged between the corner girders and one central girder arranged at the central portion, Since the formed in-girder cylindrical body is partitioned into an upper space portion and a lower space portion by a horizontal plate for installing casters, casters are disposed in the lower space portion, and a crosspiece is formed in the upper space portion. The strength and rigidity of the caster mounting horizontal plate to which the casters are mounted can be improved, and therefore damage to the central beam can be prevented.

  Since the crosspieces are formed by extending the connecting crosses constituting the intermediate girder / center girder upper connecting crossing part that connects the upper end part of the intermediate girder and the upper end part of the central girder, a horizontal plate for casters to which casters are attached The strength and rigidity of the central girder can be further improved, and therefore damage to the central beam can be reliably prevented.

  In a plastic pallet having four corner girders arranged at the corners, four intermediate girders arranged between the corner girders and one central girder arranged at the central portion, A caster is attached to each horizontal plate for casters formed on the inner cylinder of the girders, and a caster is attached to the horizontal plate for casters formed on the inner girders of one central girder, so that the plastic pallet In addition, since the five casters are arranged, even if the synthetic resin pallet on which the load is placed is bent downward, the synthetic resin pallet is bent downward by the caster arranged in the central girder. Therefore, the loaded luggage can be prevented from collapsing.

  Casters are attached to the four corner girders arranged in the corners, and casters are also attached to the central girders, so the plastic pallet on which the load is placed will bend downward Even so, the caster disposed in the central girder suppresses the downward bending of the synthetic resin pallet, and therefore the tilting of the caster disposed on the synthetic resin pallet can be prevented. Therefore, it is possible to prevent the smooth running of the synthetic resin pallet by the casters from being hindered and the casters and the caster mounting portions from being damaged.

  Examples of the present invention will be described below. However, the present invention is not limited to these examples as long as the gist of the present invention is not exceeded.

  First, the overall structure of a synthetic resin pallet as an example of an integrally molded synthetic resin pallet will be described with reference to FIGS. 1 and 2.

  1 is a corner girder arranged at the four corners of the synthetic resin pallet, 2 is an intermediate girder arranged at the middle part of the corner girder 1, and 3 is arranged at the central part of the synthetic resin pallet. The central digit.

  The upper end portion of the corner beam 1 and the upper end portion of the intermediate beam 2 are connected by a corner beam / intermediate beam upper connecting beam portion 4, and the lower end portion of the corner beam 1 and the lower end portion of the intermediate beam 2 are It is connected by a corner beam / intermediate beam lower connecting beam 5. Further, the upper end portion of the intermediate beam 2 and the upper end portion of the central beam 3 are connected by the intermediate beam / central beam upper connecting beam 6, and the lower end portion of the intermediate beam 2 and the lower end portion of the central beam 3 are connected to each other. Are connected by a middle beam / center beam lower connecting beam 7.

  In addition, each of the square shape regions surrounded by the two orthogonal cross-girder / intermediate girder upper connecting bars 4 and the two intermediate girder / middle girder upper connecting bars 6 orthogonal to each other has a rectangular shape. An upper auxiliary crosspiece 8 for connecting the opposite corner girder / intermediate girder upper connecting beam 4 and the intermediate girder / center girder upper connecting beam 6 is formed.

  Further, the back surface shape surrounded by the two orthogonal corner girders / intermediate girder lower connecting bars 5 and the two intermediate girders / middle girder lower connecting bars 7 is substantially rectangular. Such an auxiliary crosspiece 8 is not formed, and an opening 9 is formed. A fork insertion passage 10 is formed between the corner beam 1 and the intermediate beam 2 and between the intermediate beam 2 and the central beam 3.

  The upper end of the corner beam 1, the upper end of the intermediate beam 2, the upper end of the central beam 3, the corner beam / intermediate beam upper connection beam 4, the intermediate beam / middle beam upper connection beam 6, An upper deck surface D1 on which a load is placed is formed by the auxiliary crosspiece 8, and the lower end of the corner beam 1, the lower end of the intermediate beam 2, the lower end of the center beam 3, and the corner The lower deck surface D <b> 2 is formed by the beam / intermediate girder lower connecting beam portion 5 and the intermediate beam / middle beam lower connecting beam portion 7.

  Further, the above-described synthetic resin pallet is formed with a horizontally long strip-like peripheral frame 11 so as to surround the upper deck surface D1. Further, upper horizontal ribs 12 are formed on the upper outer wall surface of the peripheral frame 11 except for the central region of the four side portions 11a constituting the peripheral frame 11, and further on the lower outer wall surface of the peripheral frame 11. The intermediate horizontal ribs 13 are formed except for the central region of the four side portions 11 a constituting the peripheral frame 11. The protruding length of the upper horizontal rib 12 from the peripheral frame 11 and the protruding length of the intermediate horizontal rib 13 from the peripheral frame 11 are substantially the same. Furthermore, a lower horizontal rib 14 is formed in the vicinity of the lower portion of the intermediate horizontal rib 13 except for the central region of the four side portions 11a constituting the peripheral frame 11, and the peripheral frame 11 of the lower horizontal rib 14 is formed. The projecting length from the upper horizontal rib 12 and the intermediate horizontal rib 13 is shorter than the projecting length from the peripheral frame 11.

  Next, details of the synthetic resin pallet will be described with reference to FIGS.

  Opposing vertical edges of the upper horizontal ribs 12 located in the central region of the four side portions 11a constituting the peripheral frame 11, and the intermediate horizontal ribs 13 located in the central region of the four side portions 11a constituting the peripheral frame 11 The opposing vertical edges and the opposing vertical edges of the lower horizontal ribs 14 located in the central region of the four side portions 11 a constituting the peripheral frame 11 are connected by the opposing vertical connecting ribs 15. The vertical leading edge 15a of the opposing vertical connecting rib 15, the horizontal leading edge 12a of the upper horizontal rib 12, and the horizontal leading edge 13a of the intermediate horizontal rib 13 are formed substantially flush with each other.

  By configuring as described above, the band accommodation in which the up and down direction and the front are opened by the peripheral frame 11 and the opposing vertical connecting ribs 15 in the central region of the four side portions 11a configuring the peripheral frame 11. A recess 16 is formed. The opposing vertical connecting ribs 15 constituting the band housing recess 16 are bridged by tightening band locking connecting ribs 17 arranged so as to face the peripheral frame 11, and the tightening band locking connecting ribs 17. Is formed on the peripheral frame 11 as a substantially parallel plate. Further, the tightening band locking connection rib 17 is disposed at a retracted position by a predetermined distance L1 on the peripheral frame 11 side from the vertical tip edge 15a of the opposing vertical connection rib 15. Thus, by bridging the opposing vertical connection ribs 15 constituting the band housing recess 16 by the fastening band locking connection ribs 17, in the central region of the four side parts 11 a constituting the peripheral frame 11, A tightening band through hole H1 is formed as a vertical through hole opened in the vertical direction and surrounded by the peripheral frame 11, the opposing vertical connection rib 15 and the tightening band locking connection rib 17. Further, a notch 17b is formed in the center of the lower edge horizontal edge 17a of the tightening band locking connection rib 17.

  The upper horizontal rib 12 and the intermediate horizontal rib 13 are connected by an upper horizontal rib / intermediate horizontal rib connecting vertical rib 18 arranged at a predetermined interval, and the upper horizontal rib / intermediate horizontal rib connecting vertical rib 18. 18 vertical tip edges 18a, vertical tip edges 15a of opposing vertical connecting ribs 15, horizontal tip edges 12a of upper horizontal ribs 12, and horizontal tip edges 13a of intermediate horizontal ribs 13 are formed substantially flush with each other. Has been. Further, the intermediate horizontal rib 13 and the lower horizontal rib 14 are connected by an intermediate horizontal rib / lower horizontal rib connection vertical rib 19 arranged at a predetermined interval, and the intermediate horizontal rib / lower horizontal rib connection is established. The vertical leading edge 19 a of the vertical rib 19 is configured to be substantially flush with the horizontal leading edge 13 a of the intermediate horizontal rib 13 and the horizontal leading edge 14 a of the lower horizontal rib 14. The side shape of the horizontal rib connection vertical rib 19 (the side shape viewed from the vertical direction with respect to the opposing vertical connection rib 15 constituting the band housing recess 16) is formed in an inverted trapezoidal shape or an inverted triangular shape.

  As described above, the central regions of the four side portions 11a constituting the peripheral frame 11 are surrounded by the peripheral frame 11, the opposing vertical connection ribs 15, and the tightening band locking connection ribs 17, respectively. A tightening band through hole H1 is formed as a vertical through hole opened in the vertical direction.

  6 to 8, B1 is a known tightening band member with a hook, and the tightening band member B1 with a hook includes a band b1 and a substantially L-shaped hook b2 attached to both ends of the band b1. As shown in FIG. 8, when tightening the load G1 placed on the synthetic resin pallet, it is formed in the central region of the side portion 11a of one opposing peripheral frame 11. Each of the tightening band locking connection ribs 17 is fastened with a folded portion b2a of the substantially L-shaped hook b2, and from the outside of the tightening band locking connection rib 17, the folded portion b2a of the substantially L-shaped hook b2 is tightened. It is hooked so as to be positioned in a gap formed between the band locking connecting rib 17 and the peripheral frame 11. Similarly, if necessary, the folded portions b2a of the substantially L-shaped hooks b2 are respectively attached to the fastening band locking connection ribs 17 formed in the central region of the side 11a of the other opposite peripheral frame 11. The folded portion b2a of the substantially L-shaped hook b2 is formed between the tightening band locking connecting rib 17 and the side portion 11a constituting the peripheral frame 11 from the outside of the tightening band locking connecting rib 17. Hook it so that it is located in the gap. In this way, as shown in FIG. 8, the load G1 placed on the synthetic resin pallet is fastened to the synthetic resin pallet by the fastening band member B1 with hook.

  As described above, the tightening band locking connection rib 17 is disposed at the retracted position by the predetermined distance L1 on the peripheral frame 11 side from the vertical tip edge 15a of the opposing vertical connection rib 15. L1 is formed to be equal to the thickness b2 ′ of the substantially L-shaped hook b2 of the tightening band member B1 with hook or larger than the thickness b2 ′ of the substantially L-shaped hook b2 of the tightening band member B1 with hook. . Therefore, when the load G1 placed on the synthetic resin pallet is tightened by the tightening band member B1 with hook, the substantially L-shaped hook b2 of the tightening band member B1 with hook constitutes the peripheral frame 4. It is configured not to protrude outward beyond the band accommodating recess 16 formed in the central region of the two side portions 11a.

  As described above, when the load G1 placed on the synthetic resin pallet is fastened by the fastening band member B1 with hook, the hooks b2 of the fastening band member B1 with hooks form the four frames constituting the peripheral frame 11. Since it is configured not to protrude outward beyond the band housing recess 16 formed in the central region of the side portion 11a, the side surfaces of the synthetic resin pallets on which the luggage G1 is placed are in contact with each other. Alternatively, the hooks b2 of the elastic band pallet B1 with the hooks of the synthetic resin pallets arranged side by side are brought into contact with each other to prevent the hook b2 from being deformed or damaged. In addition, the band b1 of the tightening band member B1 with hooks of the synthetic resin pallet arranged side by side is rubbed to prevent the band b1 from being worn and damaged. It can be.

  When the load G1 placed on the synthetic resin pallet is tightened by the tightening band member B1 with hook, the hook b2 of the tightening band member B1 with hook hooks the lower end horizontal of the connecting band 17 for tightening band locking. Since it is configured to be fitted into the notch 17b formed at the center of the edge 17a, the horizontal movement of the hook b2 of the hook-and-loop tightening band member B1 is suppressed. By the tightening band member B1 with the hook, it is possible to reliably prevent the load G1 placed on the synthetic resin pallet from moving.

  9 and 10 show a tightening band member B2 with a hook-and-loop fastener, which is another embodiment of the tightening band member, and this tightening band member B2 with a hook-and-loop fastener includes the above-described tightening band member B1 with a hook. Unlike the case, the substantially L-shaped hook b2 is not attached, and the band b3 has a loop portion b4a forming a known surface fastener on one surface at the lower end thereof, and the band b3. A hook portion b4b is formed above the surface where the loop portion b4a is formed, and the loop fastener b4a and the hook portion b4b constitute a hook-and-loop fastener b4.

  When the luggage G1 placed on the synthetic resin pallet is tightened by the tightening band member B2 with the hook-and-loop fastener, first, the tip of the band b3 is connected to the loop portion b4a and the hook portion constituting the hook-and-loop fastener b4. b4b does not face the peripheral frame 11 constituting the band housing recess 16, in other words, the peripheral frame 11 so that the loop part b4a and the hook part b4b constituting the hook-and-loop fastener b4 are located outside, It is inserted from above into a tightening band through hole H1 as a vertical through hole opened in the vertical direction and surrounded by the opposing vertical connecting rib 15 and the tightening band locking connecting rib 17, and then the tightening band The tip of the band b3 discharged from the lower side of the through hole H1 is bent upward so as to sandwich the tightening band locking connecting rib 17, and is formed at the tip of the band b3. The loop part b4a constituting the hook-and-loop fastener b4 is brought into close contact with the hook part b4b constituting the hook-and-loop fastener b4 formed on the band b3, so that the load G1 placed on the synthetic resin pallet is attached with the hook-and-loop fastener Tightening is performed by the tightening band member B2.

  As described above, the tightening band through hole H1 opened in the vertical direction surrounded by the peripheral frame 11, the opposing vertical connection ribs 15, and the tightening band locking connection ribs 17 is formed. Since both the band member B1 and the tightening band member B2 with the surface fastener having the surface fastener b4 can be used, the usable tightening band member is not limited.

  Further, the tightening band locking connection rib 17 is disposed at a predetermined distance L1 and retracted from the vertical tip edge 15a of the opposing vertical connection rib 15 to the peripheral frame 11 side. It is formed to be the same as the thickness b3 ′ of the band b3 of the tightening band member B2 with the surface fastener or larger than the thickness b3 ′ of the band b3 of the tightening band member B2 with the surface fastener. Therefore, when the load G1 placed on the synthetic resin pallet is fastened by the fastening band member B2 with the hook-and-loop fastener, the band b3 of the fastening band member B2 with the hook-and-loop fastener has four sides constituting the peripheral frame 11. It is configured not to protrude outward beyond the band housing recess 16 formed in the central region of the portion 11a.

  As described above, when the load G1 placed on the synthetic resin pallet is tightened by the tightening band member B2 with the hook-and-loop fastener, the band b3 of the tightening band member B2 with the hook-and-loop fastener constitutes the peripheral frame 11. Since it is configured not to protrude outward beyond the band accommodating recess 16 formed in the central region of the four side portions 11a, the synthetic resin pallets on which the luggage G1 is placed can be connected to each other on the side surfaces. The bands b3 of the fastening band members B2 with the surface fasteners of the synthetic resin pallets arranged side by side do not come into contact with each other when arranged side by side so as to contact or be close to each other. It is possible to prevent the band b3 of the tightening band member B2 with the surface fastener of the synthetic resin pallet from rubbing and being worn and damaged.

  Further, when the load G1 placed on the synthetic resin pallet is tightened by the tightening band member B2 with the hook-and-loop fastener, a part or all of the band b3 of the tightening band member B2 with the hook-and-loop fastener in the width direction Since it is deformed by the tightening force and is configured to be fitted into a notch 17b formed at the center of the lower edge horizontal edge 17a of the tightening band locking connecting rib 17, the tightening band member B2 with the hook-and-loop fastener The movement of the band b3 in the horizontal direction is suppressed, and therefore the movement of the luggage G1 placed on the synthetic resin pallet can be surely prevented by the tightening band member B2 with the hook-and-loop fastener.

  Furthermore, since the synthetic resin pallet is formed with the peripheral frame 11 so as to surround the upper deck surface D1, the fastening band locking connection ribs 17 are formed outside the peripheral frame 11. When the luggage G1 placed on the synthetic resin pallet moves horizontally, the luggage G1 comes into contact with the peripheral frame 11, and the horizontally moved luggage G1 becomes the band b1 of the tightening band member B1 with hook. And the band b3 of the tightening band member B2 with hook and the band b3 of the tightening band member B2 with hook and loop fastener can be prevented from coming into contact with the band b3 of the tightening band member B2 with hook and loop fastener. The hook b2 of the tightening band member B1 with a hook can be deformed while being able to prevent damage from being brought into contact with the load G1 placed on the pallet. Or, it is possible to prevent things like damage.

  Next, with reference to FIGS. 11 to 13, attachment of casters to the corner beams 1 arranged at the four corners of the synthetic resin pallet will be described.

  In the corner girder 1, a girder cylindrical body 1 b having the same height as the peripheral wall 1 a of the corner girder 1 is disposed, and a caster mounting horizontal plate 1 c is provided at a substantially central portion in the vertical direction of the girder cylindrical body 1 b. The caster mounting horizontal plate 1c is formed in the inner girder body 1b, so that the inner girder body 1b has an upper space part A1 whose upper part is opened and a lower space part whose lower part is opened. It is partitioned into A1 ′. Further, the central region of the caster mounting horizontal plate 1c bulges from the lower surface 1c ′ of the caster mounting horizontal plate 1c toward the upper surface 1c ″, so that the lower surface 1c ′ of the caster mounting horizontal plate 1c has a pedestal of the caster C. A base fitting recess 1c1 into which c1 can be fitted is formed, and bolt insertion holes 1c2 are formed at four corners of the caster mounting horizontal plate 1c located in the base fitting recess 1c1. A caster C is disposed in the lower space A1 ′ of the in-cylinder cylinder 1b partitioned by the horizontal plate 1c for mounting casters.

  The above-mentioned corner girder / intermediate girder upper connecting frame 4 that connects the upper end of the corner girder 1 and the upper end of the intermediate girder 2 has a plurality of connections that connect the peripheral wall 1a of the corner girder 1 and the peripheral wall 2a of the intermediate girder 2. It has a connecting bar 4a, and the plurality of connecting bars 4a are connected to the connecting bar 4a by a plurality of intersecting bars 4b intersecting at substantially right angles.

  Among the plurality of connecting bars 4a constituting the upper and lower connecting beams 4 of the corner beam / intermediate beam, at least one connecting beam 4a exceeds the peripheral wall 1a of the corner beam 1 and is located in the upper space A1. It extends to the cylindrical body 1b and is connected to a diagonal rib 1e that connects the central girder side corner 1d1 of the corner girder 1 and the outer corner 1d2 that is diagonally opposed to the central girder side corner 1d1. ing. In addition, the diagonal rib 1e is comprised so that it may not penetrate lower space part A1 'of the in-cylinder cylinder 1b.

  With this configuration, the upper space portion A1 of the inner cylindrical body 1b constituting the corner beam 1 is connected to the diagonal rib 1e across the diagonal rib 1e and the peripheral wall 1a of the corner beam 1. Further, at least one connecting bar 4a constituting the corner beam / intermediate beam upper connecting bar portion 4 is provided. In the present embodiment, an example is shown in which two connecting bars 4a are connected to the diagonal rib 1e beyond the peripheral wall 1a of the corner beam 1.

  At least one connecting beam 4a constituting the corner beam / intermediate beam upper connecting beam portion 4 that connects the corner beam 1 and one intermediate beam 2 opposite to the corner beam 1 is included in the beam that forms the corner beam 1. A corner girder / intermediate girder connected to a diagonal rib 1e located in the upper space A1 of the cylindrical body 1b and connecting the corner girder 1 and the other intermediate girder 2 opposite to the corner girder 1 At least one connecting bar 4a constituting the upper connecting bar part 4 is also connected to the diagonal rib 1e located in the upper space part A1 of the inner cylindrical body 1b constituting the corner beam 1. A corner girder / intermediate girder upper connecting beam 4 that connects the corner girder 1 and one intermediate girder 2 opposite to the corner girder 1 is located in the upper space A1 of the inner girder body 1b. The connecting position P1 of the at least one connecting bar 4a with the diagonal rib 1e, and the corner beam 1 and the other intermediate beam facing the corner beam 1 positioned in the upper space A1 of the inner cylindrical body 1b. The diagonal rib 1e is configured to coincide with the connection position P2 of the diagonal rib 1e of at least one of the connecting bars 4a constituting the corner beam / intermediate beam upper connecting bar portion 4 that connects the two. ing.

  As described above, the diagonal rib 1e and the corner girder connected to the diagonal rib 1e beyond the peripheral wall 1a of the corner girder 1 are formed in the upper space A1 of the cylindrical body 1b formed in the corner girder 1. -By disposing at least one connecting bar 4a constituting the intermediate beam upper connecting bar part 4, the strength and rigidity of the caster mounting horizontal plate 1c formed in the inner cylindrical body 1b can be increased, Therefore, the caster mounting horizontal plate 1c is prevented from being deformed or damaged by the load applied to the caster C attached to the caster mounting horizontal plate 1c formed in the inner cylindrical body 1b of the corner beam 1. can do.

  The upper surface 1c "of the caster mounting horizontal plate 1c has a hexagonal column-shaped head of the bolt S so as to surround the bolt insertion holes 1c2 drilled at the four corners of the caster mounting horizontal plate 1c located in the base fitting recess 1c1. A hexagonal bolt head fitting rib 1c3 that can be fitted with s1 is formed, and one side of the hexagonal bolt head fitting rib 1c3 is in the girder formed in the corner beam 1 described above. It is comprised so that it may be connected with the connection crosspiece 4a which comprises the corner girder | intermediate girder upper connection crosspiece part 4 extended in upper space part A1 of the cylinder 1b. The strength and rigidity of the part fitting rib 1c3 can be increased. Therefore, it is possible to prevent the bolt head fitting rib 1c3 from being damaged by the load applied to the bolt S.

  The caster C was fitted into the base fitting recess 1c1 of the caster mounting horizontal plate 1c, and then drilled at the four corners of the caster mounting horizontal plate 1c located in the base fitting recess 1c1. The screw shaft portion s2 of the bolt S is inserted into the bolt insertion hole 1c2 from the upper surface 1c ″ side of the caster mounting horizontal plate 1c, and the head portion s1 of the bolt S is formed on the upper surface 1c ″ of the caster mounting horizontal plate 1c. It is fitted to the bolt head fitting rib 1c3. Thereafter, the nut s3 is screwed into the screw shaft portion s2 of the bolt S projecting downward from the lower surface 1c ′ of the caster mounting horizontal plate 1c located in the base fitting recess 1c1, whereby the caster mounting horizontal plate 1c. Further, the caster C is attached. In this way, the casters C are arranged at the corner girders 1 arranged at the four corners of the synthetic resin pallet.

  Next, with reference to FIGS. 14 to 16, attachment of casters to the central beam 3 of the synthetic resin pallet will be described.

  In the central girder 3, a cylindrical inner cylinder 3b having the same height as the peripheral wall 3a of the central girder 3 is disposed, and a caster mounting horizontal plate 3c is provided at a substantially central portion in the vertical direction of the inner girder cylindrical body 3b. The caster mounting horizontal plate 3c is formed in the girder cylinder 3b so that the girder cylinder 3b has an upper space part A2 with the upper part opened and a lower space part with the lower part opened. It is partitioned into A2 ′. In addition, by bulging the central region of the caster mounting horizontal plate 3c from the lower surface 3c ′ of the caster mounting horizontal plate 3c toward the upper surface 3c ″, a base c1 of the caster C is formed on the lower surface of the caster mounting horizontal plate 3c. A pedestal fitting recess 3c1 that can be fitted is formed, and bolt insertion holes 3c2 are formed at four corners of the caster mounting horizontal plate 3c located in the pedestal fitting recess 3c1. A caster C is disposed in the lower space A2 ′ of the inner girder body 3b partitioned by the horizontal plate 3c.

  The intermediate girder / center girder upper connecting beam 6 connecting the upper end of the intermediate girder 2 and the upper end of the central girder 3 has a plurality of connections connecting the peripheral wall 2a of the intermediate girder 2 and the peripheral wall 3a of the central girder 3. It has a connecting bar 6a, and the plurality of connecting bars 6a are connected to the connecting bar 6a by a plurality of intersecting bars 6b intersecting at substantially right angles.

  Among the one intermediate girder 2 and the central girder 3 positioned at the center thereof, a plurality of connecting bars 6a constituting the intermediate girder / center girder upper connecting bar 6 connecting the one intermediate girder 2 and the central girder 3 Among them, at least one connecting bar 6a extends beyond the peripheral wall 3a of the central girder 3 to the girder inner cylinder 3b located in the upper space A2, and further passes through the inner girder cylinder 3b. In the same way, among the opposite intermediate girder 2 and the central girder 3 located in the center, the middle girder and the upper middle girder connecting the other intermediate girder 2 and the central girder 3 Of the plurality of connecting bars 6a constituting the connecting bar 6, at least one connecting bar 6a also extends beyond the peripheral wall 3a of the central beam 3 to the inner beam cylinder 3b located in the upper space A2. In addition, it extends through the in-girder cylinder 3b. By configuring in this way, the connecting bar 6a extending into the inner girder body 3b constitutes one linear connecting bar 6a that connects the peripheral walls 2a of one of the opposite intermediate girders 2. It will be.

  In addition, among the other opposite intermediate girder 2 and the central girder 3 positioned at the center, a plurality of intermediate girder / center girder upper connecting beam portions 6 that connect the intermediate girder 2 and the central girder 3 are configured. Among the connecting bars 6a, at least one connecting bar 6a also extends beyond the peripheral wall 3a of the central beam 3 to the inner beam body 3b located in the upper space A2, and further, the inner beam body. Similarly, an intermediate beam extending through 3b and connecting the other intermediate beam 2 and the central beam 3 out of the other opposed intermediate beam 2 and the central beam 3 located in the center of the other intermediate beam 2 -Among the plurality of connecting bars 6a constituting the central beam upper connecting bar part 6, at least one connecting bar 6a also exceeds the peripheral wall 3a of the central beam 3 and is located in the upper space part A2. It extends to 3b, and further extends through the inner girder cylinder 3b. By configuring in this way, the connecting bar 6a extending in the inner girder 3b is connected to the opposite peripheral wall 2a of the other opposite intermediate girder 2 by one linear connecting bar 6a. Will be configured.

  Therefore, one linear connecting bar 6a for connecting one opposite intermediate beam 2 and one linear connecting bar 6a for connecting the other opposite intermediate beam 2 are provided in the central beam 3. In the upper space portion A2 of the formed intra-girder cylinder 3b, it is configured to cross in a cross shape. Hereinafter, the cross-shaped rib formed in the upper space portion A2 of the inner cylinder body 3b formed in the central beam 3 will be referred to as a cross-shaped rib 3d. Note that the cross-shaped rib 3d is not formed in the lower space portion A2 'of the intra-cylinder cylinder 3b.

  As described above, in the upper space portion A2 of the inner girder body 3b formed in the central beam 3, one linear connecting bar 6a for connecting one opposite intermediate beam 2 and the other relative By forming a cross-shaped rib 3d with a single linear connecting bar 6a for connecting the intermediate girders 2, the strength and rigidity of the caster mounting horizontal plate 3c formed in the inner cylindrical body 3b is increased. Accordingly, the caster mounting horizontal plate 3c is deformed or damaged by the load applied to the caster C attached to the caster mounting horizontal plate 3c formed in the inner cylindrical body 3b of the central beam 2. This can be prevented.

  The upper surface 3c ″ of the caster mounting horizontal plate 3c includes a hexagonal column-shaped head of the bolt S so as to surround the bolt insertion holes 3c2 drilled at the four corners of the caster mounting horizontal plate 3c located in the base fitting recess 3c1. A hexagonal bolt head fitting rib 3c3 that can be fitted with s1 is formed, and the bolt head fitting ribs 3c3 facing each other are bolt head fittings that extend beyond the cross-shaped rib 3d. The bolt head fitting rib connecting ribs 3e are connected to each other by the bolt head fitting rib connecting ribs 3e having substantially the same height as the joint rib 3c3. By connecting with the bolt 3e, the strength and rigidity of the bolt head fitting rib 3c3 can be increased. Therefore, the bolt head fitting rib 3c3 is prevented from being damaged by the load applied to the bolt S. It is possible.

  The caster C was fitted into the pedestal fitting recess 3c1 of the caster mounting horizontal plate 3c, and then drilled at the four corners of the caster mounting horizontal plate 3c located in the pedestal fitting recess 3c1. The screw shaft portion s2 of the bolt S is inserted into the bolt insertion hole 3c2 from the upper surface 3c "side of the caster mounting horizontal plate 3c, and the head s1 of the bolt S is formed on the upper surface 3c" of the caster mounting horizontal plate 3c. It is fitted to the bolt head fitting rib 3c3. Thereafter, the caster mounting horizontal plate 3c is screwed into the screw shaft portion s2 of the bolt S protruding downward from the lower surface 3c 'of the caster mounting horizontal plate 3c located in the base fitting recess 3c1. Further, the caster C is attached. Thus, the caster C is arrange | positioned to the center girder 3 arrange | positioned in the center part of the synthetic resin pallets.

  As described above, the caster C is attached to the caster attaching horizontal plate 1c formed in the inner cylindrical body 1b of the corner girder 1 disposed at the four corners of the synthetic resin pallet, and the synthetic resin pallet is attached. As shown in FIG. 17, the caster C is attached to the caster mounting horizontal plate 3c formed in the inner cylindrical body 3b of the single central girder 3 disposed in the central portion of the resin as shown in FIG. The made pallet is supported by five casters C at five points.

  By the way, in the conventional synthetic resin pallet in which casters are attached only to the four corners, the vicinity of the central girder is curved downward due to the load placed on the synthetic resin pallet. There was a problem that the loaded luggage collapsed due to the curved deformation. In addition, the load placed on the synthetic resin pallet causes the vicinity of the central girder to bend downward, and this bending deformation causes the casters disposed at the four corners of the synthetic resin pallet to tilt, and the casters There was a problem that smooth running of the synthetic resin pallet was hindered, and casters and caster mounting portions were damaged.

  However, in the present invention, as described above, since the caster C is attached to the caster attaching horizontal plate 3c formed in the inner cylindrical body 3b of the central girder 3, the composite on which the load is placed is also provided. Even if the resin pallet tries to bend downward, the caster C disposed in the central girder 3 suppresses the downward bending of the synthetic resin pallet. Collapse can be prevented.

  Since the caster C is also attached to the caster mounting horizontal plate 3c formed in the inner cylindrical body 3b of the central girder 3, the synthetic resin pallet on which the load is placed tends to bend downward. However, the caster C disposed in the central girder 3 suppresses the downward bending of the synthetic resin pallet. Therefore, the caster disposed on the synthetic resin pallet can be prevented from tilting. Therefore, it is possible to prevent the smooth running of the synthetic resin pallet by the casters from being hindered or the casters and the caster mounting portions from being damaged.

  In a state in which no load is placed on the synthetic resin pallet, as shown in FIG. 18, the casters C disposed on the central girders 3 of the synthetic resin pallet float from the floor or the like. The caster C disposed in the corner beam 1 disposed at the four corners of the synthetic resin pallet is configured to support the synthetic resin pallet on which no load is placed. preferable.

  The structure in which the casters C arranged on the central girder 3 of the synthetic resin pallet 3 are floated from the floor or the like in a state where no load is placed on the synthetic resin pallet is in the girder cylinder 3b of the central girder 3. The formed caster mounting horizontal plate 3c can be realized by disposing the caster mounting horizontal plate 1c above the caster mounting horizontal plate 1c formed in the cylindrical body 1b of the corner beam 1.

  As described above, the caster C disposed on the central girder 3 of the synthetic resin pallet is configured to float from the floor or the like in a state where no load is placed on the synthetic resin pallet. When a load is placed on the pallet made of metal, it is possible to eliminate the burden when the load of the caster C disposed on the central beam 3 to which a large load is applied is not placed. The durability of the caster C disposed in the central beam 3 can be increased.

  Further, in a state where no load is placed on the synthetic resin pallet, the load is placed by configuring the casters C disposed on the central girders 3 of the synthetic resin pallet to float from the floor or the like. It is possible to smoothly run the synthetic resin pallet in a state where the caster C is not running, and to reduce noise when the caster C is running.

  Furthermore, it is preferable that the caster C disposed in the central beam 3 to which a large load is applied when a load is placed be a higher load caster than the caster C disposed in the corner beam 1. For example, the pedestal c1 and the wheel c2 of the caster C disposed in the central beam 3 are made larger than the caster C disposed in the corner beam 1, or the caster C disposed in the central beam 3 is increased. By making the wheel c2 made of nylon or iron instead of rubber, the caster C can be a caster C that can withstand high loads.

  It is preferable from the viewpoint of strength and rigidity that the above-described intra-girder cylinder 1b formed in the corner girder 1 and the intra-girder cylinder 3b formed in the central girder 3 are preferably formed in a cylindrical shape. The inner cylinders 1b and 3b can also be square cylinders or polygonal cylinders.

FIG. 1 is a perspective view of a synthetic resin pallet according to the present invention. FIG. 2 is a rear perspective view of the synthetic resin pallet of the present invention. FIG. 3 is a partially enlarged perspective view of the vicinity of the intermediate beam of the synthetic resin pallet of the present invention. FIG. 4 is a partially enlarged vertical sectional view in the vicinity of the intermediate beam of the synthetic resin pallet of the present invention. FIG. 5 is a partially enlarged vertical sectional view of the synthetic resin pallet of the present invention in the vicinity of the intermediate beam. FIG. 6 is a partially enlarged perspective view including a partial cross section near the intermediate beam of the synthetic resin pallet of the present invention. FIG. 7 is a partially enlarged vertical sectional view of the synthetic resin pallet of the present invention in the vicinity of the intermediate beam. FIG. 8 is a partial perspective view of a fastening band member with a hook used for fastening a load placed on the synthetic resin pallet of the present invention. FIG. 9 is a partially enlarged perspective view showing a state in which a load placed on the synthetic resin pallet of the present invention is tightened by a tightening band member with a hook-and-loop fastener. FIG. 10 is a partially enlarged perspective view showing a state in which the load placed on the synthetic resin pallet of the present invention is tightened by a tightening band member with a hook-and-loop fastener. FIG. 11 is a partial perspective view of the vicinity of the corner beam of the synthetic resin pallet of the present invention. FIG. 12 is a partial rear perspective view of the vicinity of the corner beam of the synthetic resin pallet of the present invention. FIG. 13 is a partial perspective view including a partial cross section near the corner beam of the synthetic resin pallet of the present invention. FIG. 14 is a partial perspective view of the vicinity of the central girder of the synthetic resin pallet of the present invention. FIG. 15 is a partial rear perspective view of the vicinity of the central girder of the synthetic resin pallet of the present invention. FIG. 16 is a partial perspective view including a partial cross section near the central beam of the synthetic resin pallet of the present invention. FIG. 17 is a rear perspective view of the synthetic resin pallet of the present invention with casters attached thereto. FIG. 18 is a front view of the synthetic resin pallet of the present invention with casters attached thereto.

Explanation of symbols

A1, A2 ·················· Upper space A1 ', A2' ········ Lower space B1 ··········· Fastening band member with hook-and-loop fastener C ············· Caster G1 ·········· Luggage H1 ··· ............ Tightening band through hole 1 ............ Corner girder 1b ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Cylinder inner cylinder 1c ・ ・………… Caster mounting horizontal plate 2 ・ ・ ・ ・ ・ ・ ・ ・ Intermediate girder 3 ・ ・ ・ ・ ・ ・ ・ ・ Center girder 3b ・ ・ ・······································································. Connecting beam part 5 ......... Corner girder Middle girder lower connecting beam 6 ··············· Intermediate girder / center girder upper connecting beam 7 ············· Intermediate girder / center girder lower connecting beam Crosspiece 8 ・ ・ ・ ・ ・ ・ ・ ・ Auxiliary crosspiece 9 ・ ・ ・ ・ ・ ・ ・ ・ Opening 10 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Fork insertion Passage 11 ······························· 15・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Linking ribs for tightening bands

Claims (2)

In a synthetic resin pallet having four corner girders arranged at corners, four intermediate girders arranged between the corner girders, and one central girder arranged at the center, The inner space of the upper space portion and the lower space portion are formed by a caster mounting horizontal plate in which the inner tube body of the girders is formed, and the pedestal fitting recessed portion into which the pedestal of the casters can be fitted is formed. A caster is disposed in the lower space part, and at least one of the bars formed in the upper space part has a connecting beam that forms a corner beam / intermediate beam upper connecting beam part. A synthetic resin pallet formed by extending into the upper space . An upper space portion is formed by a caster mounting horizontal plate in which a cylindrical inner body is formed in the central girder, and the inner cylindrical body is formed with a base fitting recess into which a base of the caster can be fitted. And a lower space portion, and a caster is disposed in the lower space portion, and at least one of the crosspieces formed in the upper space portion has an intermediate girder / center girder upper connecting beam portion. The synthetic resin pallet according to claim 1 , wherein the connecting bar is formed by extending into the upper space .

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