JP4377345B2 - Metal pallet - Google Patents

Description

  The present invention relates to a pallet used for carrying, transporting, and storing cargo, and more particularly to a metal flat pallet.

  Conventionally, when carrying, transporting, and storing cargo, a pallet is used as a loading platform on which the cargo is placed. There are various types of pallets, such as plate and box. For example, when a plate pallet (so-called flat pallet) is used, a forklift is used by placing cargo on the top surface. It becomes possible to carry cargo easily. When the number of cargoes is large, a large amount of cargos can be distributed at a time by stacking a plurality of cargos on a flat pallet.

  Wood, metal, synthetic resin, etc. are applied as the material that constitutes such a flat pallet, but wooden pallets have the disadvantage that they are not durable because they deform or become brittle due to moisture. There are also environmental conservation issues related to the depletion of forest resources. On the other hand, a resin pallet lacks strength and rigidity, and in order to compensate for this, the structure and the like tend to be complicated and the cost is increased. Therefore, a metal pallet as shown in FIG. 5 is used as a material having relatively high rigidity and strength and excellent durability.

  A metal pallet 100 shown in FIG. 5 has a pair of metal plates M formed with a plurality of concavo-convex portions along the length direction so as to face each other in the vertical direction, and the leg member 101 is fitted therebetween. It is formed by. Then, another metal plate (not shown) disposed in the orthogonal direction is joined to the upper surface of the upper metal plate M, and a plurality of metal plates M and leg members 101 assembled in a lattice shape are formed into a flat plate shape. Form a pallet. Here, the leg member 101 is provided with a protruding portion 102 that protrudes from both side wall surfaces 106 toward the outside in the length direction of the metal plate M, and the protruding portion 102 is provided with respect to the recessed portion 105 of the metal plate M. By being fitted, the leg member 101 can be positioned in the width direction. Both side wall surfaces 106 are provided with flange portions 104 that protrude in the same direction as the protruding portion 102 and abut against the top surface of the convex portion 108 of the metal plate M. The flange portion 104 and the convex portion 108 are spot welded. It is comprised so that the leg member 101 can be fixed by joining by such as.

The applicant of the present application knows the following documents as the background art at the time of filing.
JP 2003-118734 A

  However, according to the conventional metal pallet 100, among the constituent wall surfaces of the leg member 101 to be fitted between the metal plates M, the metal pallet 100 is disposed in the length direction of the metal plate M and is fitted into the recess 105 of the metal plate M. The side wall surface 107 on which the protruding portion 102 is extended has a planar shape without an uneven portion, is not provided with a joining means such as welding, and further receives the side wall surface 107 in the concave portion 105. Therefore, there is a risk that the side wall surface 107 may be bent when a forklift claw or the like comes into contact with it and a large force is applied in the arrow X direction. In order to avoid such a problem, it is necessary to increase the thickness of the leg member 101 or to join the side wall surface 107 and the metal plate M by welding or the like, which requires much labor and cost. .

  Therefore, in view of the above circumstances, an object of the present invention is to provide a metal pallet having a strength secured against external forces from both the vertical and horizontal directions using a relatively simple configuration.

The metal pallet according to the present invention is a long-shaped pallet having a concave-convex cross-sectional shape in which a plurality of concave portions and convex portions are alternately arranged in the width direction. A pair of metal plates and a leg member fitted between the metal plates to form a predetermined interval between the metal plates, the leg members being arranged in the width direction of the metal plate, a pair of first side wall and the flange portion formed on the upper and lower ends which are welded to contact the top surface of said substantially songs folded vertically from at least one of the left and right end surface side of the first side wall galley A support surface that is in contact with the inner wall of the concave portion with respect to the width direction, and projects from the support surface toward the outside in the width direction to perform positioning in the width direction. A second side wall having a projecting portion in which a surface closing the inside of the recess is cut out The comprising "is intended.

  According to the metal pallet of the present invention, the second side wall disposed in the width direction of the metal plate is formed with a protruding portion that protrudes outward, so that it has a planar shape without an uneven portion. Compared to a certain case, the sectional moment of inertia increases. On the other hand, because the support surface is in contact with the inner wall on the inner side with respect to the width direction in the recess of the metal plate, when an external force is applied from the outer side in the width direction of the metal plate, the inner wall and the support surface cooperate with each other. The external force can be received by working, and the stress can be dispersed as compared with the case where the external force is received only by the support surface.

  By the way, when the protrusion part which protruded in the width direction of the metal plate was provided from the 2nd side wall arrange | positioned in the length direction of a metal plate, and it was made to fit in a recessed part, a part of the said protrusion part is a metal plate. It will be arrange | positioned with respect to the width direction, and a part of space in the recessed part currently formed in bowl shape toward the length direction of a metal plate may be obstruct | occluded. In this way, if there is a closed space in the recess, even if dust or dirt accumulates, it cannot be washed away by pouring water, etc., and it is unsanitary, and moisture from the outside air tends to accumulate. There is also a risk of causing rust.

  However, according to the metal pallet of the present invention, among the protrusions of the leg members fitted in the recesses of the metal plate, the surface that closes the recesses is cut out, so that, for example, the end of the metal plate It can be easily cleaned by pouring water into the recess from the part side. Furthermore, since the air in the concave portion is good, moisture is hardly accumulated and rust is hardly generated.

  By the way, in the metal pallet of the present invention, “the second side wall is formed in a pair by being bent in a substantially vertical direction from the left and right end surfaces of the first side wall, and the leg member is the pair of first first side walls. The horizontal cross-sectional shape of the side wall and the pair of second side walls has a substantially square closed cross-sectional shape ”.

  According to the metal pallet of the present invention, the second side wall disposed in the length direction of the metal plate is formed by being bent in a substantially vertical direction from the left and right end surface sides of the first side wall, and is disposed in a pair. Has been. For this reason, the bending strength of the first side wall is higher than the case where the second side wall is disposed only on either one of the left and right end surface sides of the first side wall, for example, the length of the metal plate Even if the claw of the forklift collides with the first side wall from the direction (hereinafter referred to as “lateral direction”), the possibility that the first side wall is bent can be reduced.

  The metal pallet according to the present invention is a long-shaped pallet having a concave-convex cross-sectional shape in which a plurality of concave portions and convex portions are alternately arranged in the width direction. A pair of support members formed in a substantially U-shaped cross section with a pair of metal plates, a first side wall, and a pair of second side walls are joined to face each other, thereby forming a substantially square cross section as a whole. And a leg member fitted between the pair of metal plates to form a predetermined interval between the metal plates, and the first side wall is disposed in the width direction of the metal plate, A flange portion that contacts the top surface of the convex portion is formed, and the second side wall is a member disposed in the length direction of the metal plate, and is substantially from the left and right end surface sides of the first side wall. It is formed at the corner by being bent in the vertical direction, and on the inner wall outside the width direction. A projecting fitting portion that is in contact with the projecting fitting portion extends upward and downward, and is bent from the projecting portion to the inside in the width direction. A predetermined gap is formed between the projecting fitting portion and the projecting fitting portion. And a main support surface extending in the upward and downward directions is provided for positioning the leg member in the width direction in cooperation with the protruding fitting portion. is there.

  According to the metal pallet of the present invention, since the second side wall is formed from the left and right side surfaces of the first side wall as in the case of the above-described invention, when external force is applied from the lateral direction, Even when it collides with the first side wall, the first side wall and the pair of second side walls have a substantially U-shaped cross section, so that the first side wall is not easily bent. In addition, the second side wall disposed in the length direction of the metal plate is provided with a main fitting portion extending from the inner wall in the concave portion of the metal plate to be in contact with the inner wall on the inner side in the width direction. A support surface is provided. Thereby, it is possible to receive an external force from the vertical direction in cooperation with the inner wall and the main support surface, and because the main support surface of a relatively large area in contact with the inner wall compared to the protrusion, The stress is effectively dispersed. Further, the provision of the protruding portion that protrudes outward from the main support surface increases the sectional moment of inertia as compared to the case of a flat shape without unevenness. Claws and the like collide with the protrusions, and the impact is alleviated, and the strength against external force from the outside in the width direction of the main support surface is further improved.

  In addition, since a gap passing through the recess of the metal plate is provided between the main fitting portion and the protruding fitting portion, it is easy to clean by flowing water or the like into the recess. The metal pallet can be maintained in a simple way. Furthermore, since the leg member is configured by combining a pair of common parts, that is, support members having a substantially U-shaped cross section, a leg member having a substantially square cross section can be configured in a relatively simple manner, Compared to the case where the leg members are configured by combining the members, the management of the members is also easier.

  Thus, according to the metal pallet of the present invention, the second side wall disposed in the length direction of the metal plate is formed with the protruding portion that protrudes outward, so that the outer side in the width direction ( It is relatively strong against external force applied in the vertical direction) and is difficult to bend. In addition, since the support surface is in contact with the inner wall on the inner side with respect to the width direction of the inner wall of the concave portion of the metal plate, when an external force is applied from the vertical direction, the inner wall and the support surface receive the external force in cooperation. The stress can be dispersed as compared with the case where an external force is received only by the support surface. Accordingly, not only the protrusions but also the support surface can be configured to be hardly bent, and the bending strength can be improved with respect to the external force. Furthermore, since the air in the concave portion is good, moisture is hardly accumulated and rust is hardly generated. For this reason, it is easy to keep the metal plate clean and hard to rust, and the durability and life of the metal pallet can be improved.

  Hereinafter, a metal pallet according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view showing the entirety of a metal pallet according to the present invention, FIG. 2 is an exploded perspective view of a main part, FIG. 3 is a plan view and a front view of a leg member, and FIG. It is the figure which represented typically the fitting state of a leg member and a metal plate.

  As shown in FIG. 1, the metal pallet 1 of the present invention is fitted between the long metal plates M1 and M2, the metal plate M1 and the metal plate M2, which are arranged facing each other in the vertical direction. And a leg member 2 for forming a predetermined gap between the metal plates M1 and M2, and a metal plate M3 disposed in a direction orthogonal to the metal plates M1 and M2 and joined to the upper surface of the metal plate M1. ing. As shown in FIG. 2, the metal plates M <b> 1 to M <b> 3 have three concave portions 3 a, 3 b, and 3 c and convex portions 4 a and 4 b that are formed between the concave portions 3 a to 3 c, alternately arranged in the width direction. It is a long member having a cross-sectional shape with an uneven portion, and is a lattice of a metal plate M1 arranged in the vertical direction and a metal plate M3 arranged in a horizontal direction perpendicular to the metal plate M1. It is configured so that cargo can be placed on the upper surface. And the metal plate M2 is arrange | positioned through the leg member 2 under the metal plate M1, and by this, the nail | claw of a forklift etc. are inserted under the metal plate M1, and cargo can be simply It can be lifted and transported.

  An appropriate metal such as steel or aluminum is applied to the metal plates M1 to M3, and the concave portions 3a, 3b, 3c and the convex portions 4a, 4b are formed by pressing or bending. In addition, it is more preferable to apply a material whose surface is plated with zinc or zinc-iron alloy because corrosion resistance and paintability are improved. Further, the end portions of the concave portions 3a and the concave portions 3c of the metal plates M1 to M3 have their lower ends bent into a substantially U shape, and are fitted with a main fitting portion 11 and a protruding fitting portion 12 of the leg member 2 described later. The fitting strength when it is inserted is improved.

  The leg member 2 forms a predetermined gap between the metal plate M1 and the metal plate M2, and as shown in FIG. 2 or FIG. 3, a support member 5 having a pair of substantially U-shaped cross sections. Are made to face each other and joined at the joint S1. The method for joining the support members 5 to each other is not particularly limited, and joining means such as an adhesive, a bolt, and a nut may be used. In this embodiment, welding such as spot welding or arc welding is used. Joined using technology.

  FIG. 3A is a plan view of the support member 5, and FIG. 3B is a front view. As shown in FIG. 3, the support member 5 includes a first side wall 6 and a second side wall 7 disposed in a direction substantially perpendicular to the first side wall 6. The first side wall 6 is formed with a flange portion 8 projecting toward the outer side direction (in the substantially U-shaped cross section, the opposing second side wall 7 side is the inner side direction) at the upper end and the lower end, It is comprised so that it may contact | abut with respect to the top surface of the convex parts 4a and 4b of the metal plates M1 and M2. The flange portion 8 is formed with an emboss S2 for a welding point, and the metal plates M1 and M2 and the flange portion 8 can be easily joined (for example, using an automatic welding device) by spot welding. it can.

  The second side wall 7 has a protruding portion 9 formed by being bent in a substantially vertical direction from the left and right end surfaces of the first side wall 6, and a main support surface 10 formed by bending inward from the end surface of the protruding portion 9. It consists of and. The main support surface 10 is provided with a main fitting portion 11 extending at the upper end and the lower end at the upper end and the lower end, abutting against the inner wall 13 (described later) inside the concave portion 3c. A protruding fitting portion 12 is provided so as to abut against the outer wall 14 (described later) of the concave portion 3a and the concave portion 3c. And between the main fitting part 11 and the protrusion fitting part 12, the clearance gap K which penetrates the inside of recessed part 3a, 3c is provided. The main support surface 10 corresponds to the “support surface” of the present invention, and the gap K corresponds to a configuration in which “the surface closing the inside of the recess is cut out”.

  Then, the assembly method of the metal pallet 1 of this invention is demonstrated based on FIG.2 and FIG.4. First, as shown in FIG. 2, the first side wall 6 of the leg member 2 is disposed in the width direction X of the metal plate M2 in the vicinity of the end of the metal plate M2 (that is, the second side wall 7 is arranged in the length direction Y). The main fitting portion 11 and the protruding fitting portion 12 are fitted into the recess 3a (3c). At this time, in the fitting portion between the leg member 2 and the metal plate M2, as shown schematically in FIG. 4, the inner wall 13 on the inner side with respect to the width direction X among the inner walls in the recess 3a (3c) The main fitting portion 11 of the main support surface 10 is in contact, and the protruding fitting portion 12 of the protruding portion 9 is in contact with the outer inner wall 14. Thus, the main fitting part 11 and the protrusion fitting part 12 contact | abut to the inner wall in the recessed part 3a (3c), and can position the leg member 2 with respect to the width direction X. Similarly, a plurality (three in FIG. 1) of leg members 2 are arranged at equal intervals on one metal plate M2.

  Next, the metal plate M1 is opposed to the metal plate M2 so that the concave portions 3a to 3c face each other (see FIG. 2), that is, in an inverted state, is disposed on the upper side of the leg member 2, and the procedure described above is performed. Similarly, the recess 3a (3c) is fitted to the main fitting portion 11 and the protruding fitting portion 12. And the flange part 8 formed in the 1st side wall 6 and the top surface of the convex parts 4a and 4b of the metal plates M1 and M2 are joined by welding. Thereby, the position of the length direction Y (refer FIG. 2) of the leg member 2 is fixable. The type of welding is not particularly limited, and a fusion welding method such as gas welding or arc welding may be used, or a pressure welding method such as spot welding or a brazing method may be used. . Further, it may be performed manually by an operator, or automatically or semi-automatically using a welding robot. In short, any material may be used as long as the flange portion 8 and the top surfaces of the convex portions 4a and 4b can be joined.

  The composite body of the metal plates M1 and M2 and the plurality of leg members 2 formed in this way is arranged in parallel to the width direction (three bodies in FIG. 1), and the upper surface of the metal plate M1. In addition, a plurality (five in FIG. 1) of metal plates M3 are arranged at equal intervals in a direction orthogonal to the metal plate M1. Here, the metal plate M3 is arranged in the same direction as the metal plate M1, that is, the direction in which the convex portions 4a and 4b abut on the top surfaces of the concave portions 3a to 3c of the metal plate M1. And the convex parts 4a and 4b of the metal plate M3 and the recessed parts 3a-3c of the metal plate M1 are joined using spot welding etc., and the metal pallet 1 is completed. By comprising in this way, the metal plate M1 and the metal plate M3 are formed as a grid | lattice-like plane board, and it becomes possible to mount the cargo etc. of various forms on an upper surface. Further, a gap is formed below the metal plate M1 and the metal plate M3 by the metal plate M2 and the leg member 2, so that a forklift claw or the like can be easily inserted. Note that the assembly order of the metal plates M1 to M3 is not limited to this, and can be changed as appropriate.

  As described above, according to the metal pallet 1 of this example, the main fitting portion 11 that contacts the inner wall 13 on the inner side with respect to the width direction X of the recess 3 a extends on the main support surface 10 of the leg member 2. Therefore, even when an external force is applied from the outside in the width direction X (for example, when a forklift claw collides), the external force is received in cooperation with the inner wall 13 on the inside. Compared to the case of receiving the main support surface 10 alone, it is relatively difficult to deform. Furthermore, since the protrusion part 9 which protruded toward the outer side of the width direction X is formed in the left-right both ends side of the main support surface 10, the 2nd side wall 7 is exhibiting the uneven | corrugated cross-sectional shape as a whole. For this reason, the cross-sectional secondary moment increases compared to the case of a planar shape without unevenness, and it is a strong structure that is less likely to bend against the external force. Therefore, it is not necessary to increase the thickness of the second side wall 7 or to join the metal plates M1 and M2 by using a joining means such as welding, and by using an external force from the width direction X using a relatively simple configuration. A sturdy metal pallet 1 that is difficult to deform can be provided.

  On the other hand, according to the metal pallet 1 of the present example, the first side wall 6 of the leg member 2 is not provided with a protruding portion and a surface that contacts the recess 3a and the like, but the metal plates M1, M2 by the flange portion 8 are provided. Therefore, even when an external force is applied from the outside in the length direction Y, it is considered that it is not easily bent. Furthermore, since the second side wall 7 is formed from the left and right ends of the first side wall 6, it is relatively difficult to bend with respect to external force as compared with the case where the second side wall 7 is formed from only one of them. A metal pallet 1 can be provided.

  On the other hand, according to the metal pallet 1 of the present example, the gap K is formed between the main fitting portion 11 and the projecting fitting portion 12, and the concave portion 3a is formed through the concave portion 3a. It can be cleaned easily by pouring water into it. Further, since the gap K penetrates, a passage through which the poured water flows out is also secured, and the water drainage is relatively good. Therefore, it is possible to provide a sanitary and economical metal pallet 1 that can easily remove dust and dirt, and that can hardly be moistened and rusted.

  Moreover, according to the metal pallet 1 of this example, since it is comprised by combining the two support members 5 with a substantially U-shaped cross section, the leg member 2 which exhibits a substantially four-section cross section with a relatively simple configuration. Can be formed. Furthermore, it is preferable to apply the pair of support members 5 because the members can be easily shared.

  The present invention has been described with reference to the preferred embodiments. However, the present invention is not limited to these embodiments, and various improvements and modifications can be made without departing from the spirit of the present invention, as described below. Design changes are possible.

  In the said embodiment, although the metal pallets 1 illustrated what was comprised from the metal plates M1-M3 and the leg member 2, it is not limited to this structure, a metal plate M2 has a metal under the metal plate M2. Another metal plate disposed in a direction orthogonal to the plate M2 may be further joined, or a configuration including a backing material formed of wood, resin, or the like may be used instead of the metal plate. According to this configuration, since the lower surface side of the metal pallet 1 has a flat shape equal to or higher than the upper surface side, a plurality of stages are stacked in a state where cargo is placed on the upper surface of the metal pallet 1. However, the lower surface side of the metal pallet 1 is less likely to be caught by freight and damaged, and the metal pallet 1 on the upper side is less likely to be displaced or tilted.

  Moreover, in the said embodiment, although the structure which has arrange | positioned long metal plate M1, M3 in the grid | lattice form was illustrated, it replaced with metal plate M1, M3, and a some recessed part and convex part are width direction. It is good also as a structure which uses the substantially rectangular-shaped metal plate formed with the uneven | corrugated cross-sectional shape arranged alternately. However, when the long metal plates M1 to M3 are applied as in the present invention, the metal pallet 1 that is relatively lightweight and excellent in water drainage and air permeability can be provided, which is more preferable.

  Moreover, in the said embodiment, although the thing which the three leg members 2 were fitted by the metal plate M1 and the metal plate M2 was illustrated, it is not limited to this, The length of metal plate M1, M2 An appropriate number can be selected according to the strength required by the sheath specifications. Further, the number of metal plates M1 is not limited, and may be four or more or less than three. In short, any number may be used as long as cargo can be placed on the upper surface.

It is a perspective view which shows the metal pallets of this invention. It is a disassembled perspective view which shows the principal part of metal pallets. It is the top view and front view of a leg member. It is explanatory drawing which expanded the fitting part of a leg member and a metal plate. It is explanatory drawing which represented typically the joining state of the leg member and a metal plate in the conventional metal pallets.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Metal pallet 2 Leg member 3a, 3b, 3c Concave part 4a, 4b Convex part 5 Support member 6 1st side wall 7 2nd side wall 8 Flange part 9 Protrusion part 10 Main support surface (support surface)
DESCRIPTION OF SYMBOLS 11 Main fitting part 12 Projection fitting part 13 Inner inner wall 14 Outer inner wall M1, M2, M3 Metal plate K Gap

Claims (2)

A pair of elongated metal plates that are arranged to face each other in the vertical direction and have a concave-convex cross-sectional shape in which a plurality of concave portions and convex portions are alternately arranged in the width direction,
A leg member fitted between the metal plates and forming a predetermined interval between the metal plates;
The leg member is
Is arranged in a width direction of the metal plate, a pair of first side wall and the flange portion formed on the upper and lower ends which are welded to contact the top surface of the convex portion,
A member which is formed by folding galley substantially perpendicular from at least one of the left and right end face side of the first side wall, the support surface abutting the inner side of the inner wall of the recess with respect to the width direction, and And a second side wall having a protrusion protruding from the support surface toward the outside in the width direction and having a protrusion in which a surface for positioning in the width direction and closing the inside of the recess is cut out. Made pallet. The second side wall is formed in a pair by being bent in a substantially vertical direction from the left and right end surface sides of the first side wall,
2. The metal pallet according to claim 1, wherein the leg member has a closed cross-sectional shape having a substantially square cross section at the pair of first side walls and the pair of second side walls.

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