JP2007210624A - Metal pallet and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a metal pallet whose leg material has a required height at a low cost and easily to a user side by suppressing costs such as installation expenditure to the lowest. <P>SOLUTION: A top plate 13 of the metal pallet P and an upper plate 10, a lower plate 11 and supports 12 of the leg material A use a forming material of a metal thin sheet as a raw material, which is bent and molded into a wave shaped cross-section in which fitting channels 15a-15e with a U-shaped cross-section in the width direction are formed alternately upward and downward. The top plate, and the upper plate and the lower plate of the leg material are formed by using longitudinal plate pieces 13a-13e, 10a-10c and 11a-11c which are made by cutting the forming material into specified lengths in accordance with vertical and transverse lengths of the specified pallet. The supports are assembled by using assembly plate pieces such as a first assembly plate piece 12a and a second assembly plate piece 12b cut into specified lengths from the forming material in accordance with the arbitrary assembly height of the leg material. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a metal pallet for loading which is assembled into a flat lattice pallet as a whole using a leg member sandwiching a plurality of columns with a space between an elongated upper plate and a lower plate as a supporting member. And a manufacturing method thereof.

Conventionally, in various metal pallets, a plurality of leg members sandwiching a channel-shaped column with an interval between an elongated upper plate and a lower plate are arranged in parallel at intervals, and the upper plate of these leg members is arranged. On top of this, there is a one-side pallet-type assembly that forms a lattice shape, for example, by arranging a plurality of elongate top plates in a direction perpendicular to the upper plates and welding them in parallel with each other at intervals (Patent Documents 1 to 3). 3).
JP 2003-118734 A Japanese Utility Model Publication 3-56516 Japanese Utility Model Publication No. 63-40448

  By the way, recently, as for the metal pallet having a structure in which the legs are sandwiched between the upper plate and the lower plate as described above, the loading height is lowered from the user side when using or storing the pallet. In order to save space, there may be a demand for a structure in which the height of the legs is kept low. On the other hand, for example, there is a need to provide a pallet with a structure in which the height of the legs is increased so that luggage can be stored in the space between the top plate and the lower plate of the legs and the pallet can be used as a shelf. There is also.

  Therefore, conventionally, in response to such a request from the user side, when trying to manufacture a metal pallet with different leg heights, for example, each time a column of an arbitrary height is press-bent-molded as desired. It is also possible to adjust the height of the legs by sandwiching the struts of the desired height between the upper plate and the lower plate, thereby providing the pallet with the desired height to the user side. It is done. However, this requires processing equipment such as a dedicated press-bending die for each strut of a different height, so that the equipment cost increases dramatically, and the user's request can be met. There was no problem.

  In order to solve the above-described problem, the invention described in claim 1 includes a plurality of support columns spaced in the longitudinal direction between the elongated upper plate 10 and the lower plate 11, for example, as shown in the following illustrated embodiment. A plurality of legs A sandwiching 12 are juxtaposed at intervals, and a plurality of elongate top plates 13 are arranged on the upper plate 10 of the legs A in a direction perpendicular to the upper plates 10 with intervals. In the metal pallet P fixed in parallel, the top plate 13 and the upper plate 10, the lower plate 11 and the support column 12 of the leg material A all have fitting grooves 15a to 15e having a U-shaped cross section in the width direction. A long metal sheet forming material F bent into a corrugated cross section formed alternately upward and downward is used as a material, and the top plate 13 and the upper plate 10 and the lower plate 11 of the leg material A are respectively predetermined pallets. From the forming material F according to the length and width The long plate pieces 13a to 13e, 10a to 10c, and 11a to 11c cut into lengths are used, and the top plate 13 is disposed at both ends in the length direction on the upper plate 10 of the leg material A. While the long plate pieces 13a and 13e are welded in a state where the downward fitting grooves 15a and 15c having the outer sides in the width direction protrude from the edge of the upper plate 10, the support column 12 is formed of the leg material. Assembling using the assembly plate pieces such as the first assembly plate piece 12a and the second assembly plate piece 12b cut to a desired length from the forming material F according to an arbitrary assembly height of A, the leg material A At both end portions, the upper end of the assembly plate piece is fitted into the fitting grooves 15a and 15c of the top plate 13 projecting from the end edge of the upper plate 10 to provide a standing wall portion, and the width direction of the standing wall portion One side of the assembly plate piece in the fitting grooves 15a and 15c on both sides Are inserted into the fitting grooves 15a and 15c on both sides in the width direction of the upper plate 10 and the lower plate 11, respectively, so that side wall portions are erected. While forming in a channel shape with the standing wall portion, between the both end portions of the leg member A, a pair of the assembly plate pieces are opposed to each other, and the upper end and the lower end of each of the upper plate 10 and the lower plate 11 are respectively widened. It is characterized by being formed in parallel pair bundles by fitting into the fitting grooves 15a and 15c on both sides in the direction.

  The invention according to claim 2 is, for example, as shown in the embodiment shown below, a plurality of legs in which a plurality of struts 12 are sandwiched between the elongated upper plate 10 and the lower plate 11 in the longitudinal direction. A metal pallet in which A is juxtaposed at intervals, and a plurality of elongate top plates 13 are juxtaposed at intervals on the upper plate 10 of the leg material A in a direction orthogonal to the upper plate 10. In the manufacturing method, a forming material F of a long thin metal plate bent into a corrugated cross-sectional shape in which fitting grooves 15a to 15e having a U-shaped cross section are alternately formed upward and downward in the width direction is used as a raw material. The top plate 13 and the upper plate 10 and the lower plate 11 of the leg material A are formed by cutting into a predetermined length according to the vertical and horizontal lengths of the pallet, while the same forming material F is formed on the leg material A. Depending on any assembly height of the desired length A plurality of assembly plate pieces such as a first assembly plate piece 12a and a second assembly plate piece 12b constituting the support column 12, and then, the upper plate 10 is arranged in parallel at intervals, The top plates 13 are arranged side by side in a direction orthogonal to the top plates 10 with a gap therebetween, and the top plates 13 disposed at both ends in the length direction of the top plate 10 in the top plates 13 are respectively The grid-shaped top plate assembly is arranged in such a manner that the fitting grooves 15a and 15c on the outer side in the width direction protrude from the edge of the upper plate 10, and the bottom walls of the fitting grooves that overlap each other are welded by spot welding. The solid body 20 is assembled, and then the top plate assembly 20 is oriented so that the upper plate 10 faces upward. At both ends of the upper plate 10, one end of the assembly plate piece is separated from the edge of the upper plate 10. Fit into the fitting grooves 15a and 15c of the protruding top plate 13 A standing wall portion is formed, and one side edge of the assembly plate piece is fitted and connected to fitting grooves 15a and 15c provided on both sides in the width direction of the standing wall portion, and one end of the assembly plate piece is connected to the upper plate 10 The side walls are erected by fitting into the fitting grooves 15a and 15e on both sides in the width direction, and the column 12 is formed in a channel shape by the side walls and the standing wall, while the both ends of the upper plate 10 are In between, a pair of the assembly plate pieces are opposed to each other, and one end of each is fitted into the fitting grooves 15a and 15c on both sides in the width direction of the upper plate 10 to form the support columns 12 in parallel pairs. Thereafter, the lower plate 11 is placed on the support column 12 standing on each upper plate 10 of the top plate assembly 20, and the upward opposite end of the parallel assembly plate piece facing the support column 12 is set to the lower plate 11. After fitting into the fitting grooves 15a and 15c on both sides in the width direction of the plate 11, welding is performed by arc welding. It is characterized by being assembled.

  According to a third aspect of the present invention, a plurality of legs A each having a plurality of struts 12 sandwiched between the elongated upper plate 10 and the lower plate 11 in the longitudinal direction are arranged in parallel at intervals. On the upper surface of the upper plate 10 of the material A, a plurality of elongate top plates 13 are juxtaposed and spaced apart in a direction orthogonal to the upper plate 10, while being fixed to the lower surface of the lower plate 11 of the leg material A, In the metal pallet P ′ in which a plurality of elongated bottom plates 25 are fixed in a direction orthogonal to the lower plate 11 at intervals, the top plate 13, the upper plate 10, the lower plate 11 and the column 12 of the leg material A The bottom plate 25 is made of a long metal sheet forming material F bent into a cross-sectional corrugated shape in which fitting grooves 15a to 15e having a U-shaped cross section are alternately formed upward and downward in the width direction. A plate 13, an upper plate 10 and a lower plate 11 of the leg material A, and the bottom plate 5 is formed using long plate pieces 13a to 13e, 10a to 10c, 11a to 11c, and 25a to 25e cut to a predetermined length from the forming material F in accordance with predetermined vertical and horizontal lengths of the pallet, The top plate 13 has the downward fitting grooves 15a and 15c respectively having the long plate pieces 13a and 13e disposed at both ends in the length direction on the upper plate 10 of the leg material A on the outer sides in the width direction. The bottom plate 25 is welded in a state of protruding from the edge of the upper plate 10, and the long plate pieces 25a and 25e disposed at both ends in the length direction of the lower plate 11 of the leg material A are respectively outward in the width direction. While the above-mentioned upward fitting grooves 15a and 15c are welded in a state of projecting from the end edge of the lower plate 11, the support column 12 is formed in accordance with an arbitrary assembly height of the leg member A. Cut from forming material F to desired length Assembling by using assembly plate pieces such as the first assembly plate piece 12a and the second assembly plate piece 12b that are cut off, the upper end of the assembly plate piece is connected to the edge of the upper plate 10 at both ends of the leg A. The bottom plate 25 is fitted into the fitting grooves 15 a and 15 c of the bottom plate 25 that protrudes from the edge of the lower plate 11. The side wall of the assembly plate piece is fitted into the fitting grooves 15a and 15c provided on both sides in the width direction of the vertical wall portion, and the upper and lower ends of the assembly plate piece are respectively connected to the upper plate 10 and The lower plate 11 is fitted into the fitting grooves 15a and 15c on both sides in the width direction so as to stand upright, and the side wall and the standing wall are formed in a channel shape. A pair of the assembly plate pieces are opposed to each other, and the upper end and the lower end of each of the assembly plate pieces are It fitted 10 with both sides in the width direction of the fitting groove 15a · 15c of the lower plate 11, characterized by comprising forming the parallel-to-bundle.

  According to a fourth aspect of the present invention, a plurality of legs A each having a plurality of struts 12 sandwiched between the elongated upper plate 10 and the lower plate 11 in the longitudinal direction are arranged in parallel at intervals, and the legs On the upper surface of the upper plate 10 of the material A, a plurality of elongate top plates 13 are juxtaposed and spaced apart in a direction orthogonal to the upper plate 10, while being fixed to the lower surface of the lower plate 11 of the leg material A, In the method of manufacturing a metal pallet in which a plurality of elongated bottom plates 25 are fixed to each other in a direction orthogonal to the lower plate 11, the fitting grooves 15a to 15e having a U-shaped cross section are alternately formed upward and downward in the width direction. A long metal thin plate forming material F bent into a corrugated cross section is used as a raw material, and the forming material F is cut into a predetermined length according to a predetermined pallet vertical and horizontal length, and the top plate 13 and the leg material are cut. The upper plate 10 and the lower plate 11 of A, and the bottom plate 25 On the other hand, a plurality of first assembly plate pieces 12a and second assembly plate pieces constituting the support column 12 by cutting the same forming material F into a desired length according to an arbitrary assembly height of the leg material A. Forming an assembly plate piece such as 12b, and then paralleling the upper plate 10 with a space therebetween, while placing the top plate 13 in a direction perpendicular to the upper plate 10 with a space therebetween, Among the top plates 13, the top plate 13 disposed at both ends in the length direction of the upper plate 10 is such that the fitting grooves 15 a and 15 c on the outer side in the width direction protrude from the edge of the upper plate 10. The bottom walls of the fitting grooves which are arranged and welded to each other are welded by spot welding to assemble a grid-like top plate assembly 20, and the lower plate 11 is arranged in parallel with a space therebetween, Insert the bottom plate 25 in a direction perpendicular to The bottom plate 25 arranged at both ends in the length direction of the lower plate 11 among the bottom plates 25 has the fitting grooves 15a and 15c on the outer sides in the width direction of the lower plate 11, respectively. It arrange | positions in the state which protruded from the edge, and it welds between the bottom walls of the said fitting groove which overlaps with spot welding s, and assembles the grid | lattice-like bottom board assembly 30, Then, the said top board assembly 20 is attached to the said upper board. 10 is oriented upward, and at both ends of the upper plate 10, one end of the assembly plate piece is fitted into the fitting grooves 15 a and 15 c of the top plate 13 protruding from the edge of the upper plate 10. A standing wall portion is formed, and one side edge of the assembly plate piece is fitted and connected to fitting grooves 15a and 15c provided on both sides in the width direction of the standing wall portion, and one end of the assembly plate piece is connected to the upper plate 10 The side wall portion is fitted in the fitting grooves 15a and 15c on both sides in the width direction. The column 12 is formed in a channel shape by the side wall portion and the standing wall portion, while a pair of the assembly plate pieces are opposed to each other between the both end portions of the upper plate 10, and one end of each of the assembly plate pieces is opposed to each other. The support columns 12 are formed in parallel pair bundles by fitting into the fitting grooves 15a and 15c on both sides of the upper plate 10 in the width direction, or the bottom plate assembly 30 is oriented so that the lower plate 11 is on the upper side. At both ends of the lower plate 11, one end of the assembly plate piece is fitted into the fitting grooves 15a and 15c of the bottom plate 25 protruding from the edge of the lower plate 11 to form a standing wall portion, One side edge of the assembly plate piece is fitted and connected to the fitting grooves 15a and 15c provided on both sides in the width direction of the standing wall portion, and one end of the assembly plate piece is connected to the fitting groove on both sides in the width direction of the lower plate 11 15a and 15c are fitted into the side wall portion, and the side wall portion and the standing wall portion form a channel shape. While the post 12 is formed, a pair of the assembly plate pieces are opposed to each other between both ends of the lower plate 11, and one end of each is fitted in the fitting grooves 15 a and 15 c on both sides in the width direction of the lower plate 11. Then, the pillars 12 are formed in a pair of parallel bundles, and then the lower plate 11 of the bottom plate assembly 30 is covered with the pillars 12 standing on the upper plates 10 of the top plate assembly 20. The other end of the parallel and opposite assembly plate pieces of the column 12 fitted into the fitting grooves 15a and 15c on both sides in the width direction of the lower plate 11, and then welded and assembled by arc welding, or The upper plate 10 of the top plate assembly 20 is placed on the support columns 12 standing on the lower plates 11 of the bottom plate assembly 30 so that the parallel assembly plate pieces facing the support columns 12 face upward. The ends are fitted into the fitting grooves 15a and 15c on both sides of the upper plate 10 in the width direction. From, characterized by comprising assembling by welding with arc welding.

  According to the present invention, for example, at the request from the user side, the assembly height of the leg is made higher or lower than the standard, and therefore the height of the leg strut needs to be changed one by one, Always cut and form post assembly plate pieces from common forming material to a length that matches the user's desired leg height, and then use these assembly plate pieces to assemble the support posts in channel and pair bundles. Therefore, there is no need to prepare processing equipment such as a dedicated press bending die for each column of legs having different heights as in the past, and as a result, costs such as equipment costs can be kept as low as possible. The pallet with the desired height of the legs can be easily and inexpensively provided to the user side. In addition, the remaining pieces of the forming material can be effectively used as an assembly piece such as an assembly plate piece of the column without being discarded, and the cost of the assembly material can be significantly reduced.

  Further, according to the present invention, the end portions of the assembly plate pieces forming the support columns are fitted into the fitting grooves of the top plate and the bottom plate protruding from the edge of the upper plate and the lower plate at the both ends of the leg material. Because it is an assembly structure that forms the standing wall part of the channel-shaped support column, and the leg material covers and protects the end (edge) of the upper plate and lower plate, which are dangerous parts, from the outside by the end of the assembly plate piece, Therefore, safety can be improved so as not to get injured in handling the pallet. In addition, the conventional legs are formed by bending the support column into a channel shape with a simple flat plate. However, in the present invention, the assembly plate pieces having a corrugated cross section in which fitting grooves having a U-shaped cross section are alternately formed up and down. Since the support column is formed in a channel shape, the buckling (compression) strength can be further improved. Therefore, according to the present invention, the leg material is secured at the both end portions with sufficient buckling strength by the channel-shaped column made of the assembly plate piece having a corrugated cross section. It is sufficient that the two assembly plate pieces having a corrugated cross section are opposed to each other to form a pair of support columns, and the entire pallet can be reduced in weight by the amount of metal plate pieces to be reduced.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 is an assembled perspective view of a metal pallet as an example of the present invention, FIG. 2 is an exploded perspective view thereof, FIG. 3A is an enlarged perspective view of a main part of a forming material to be used, and FIG. is there. The metal pallet P in the illustrated example has a plurality of legs A each having a plurality of support columns 12 sandwiched between an elongated upper plate 10 and a lower plate 11 (three in the illustrated example). A plurality of elongate top plates 13 (five in the illustrated example) are juxtaposed and fixed to each other in a direction perpendicular to the upper plate 10 and assembled into a lattice-like single-sided pallet type.

  The illustrated metal pallet P is a long, for example, steel (steel) thin plate in which the upper plate 10, the lower plate 11, the column 12, and the top plate 13 of the leg material A and the top plate 13 are bent and formed into a waveform in the cross section in the width direction. The forming material F is used as a material (assembly material). That is, as shown in FIG. 3, the forming material F is bent into a cross-sectional corrugated shape in which downward fitting grooves 15a, 15b, 15c and upward fitting grooves 15d, 15e are formed alternately. Molded. Further, the width direction side portions 15f of the forming material F are respectively bent at the lower ends inwardly in the fitting grooves 15a and 15c to provide a pressing portion 15g having an L-shaped cross section, and the both side portions 15f increase rigidity. It is a shape which raises the fitting intensity | strength when the assembly board piece 12a * 12b of the support | pillar 12 mentioned later is inserted.

  The upper plate 10 and the lower plate 11 of the leg material A are cut into a predetermined length from the forming material F according to a predetermined pallet horizontal size, as shown in FIG. , 11a to 11c. The top plate 13 is formed by using long plate pieces 13a to 13e cut from the same forming material F into a predetermined length according to a predetermined vertical size of the pallet. The support column 12 is also assembled using a relatively short assembly plate piece cut to a desired length from the same forming material F in accordance with an arbitrary assembly height of the leg material A. The support column 12 in the illustrated example includes a first assembly plate piece 12a cut to a length of 110 mm in accordance with a general standard assembly height, and an abbreviation of fitting grooves 15a to 15e of the upper plate 10 from the first assembly plate piece 12a. Two types of second assembly plate pieces 12b cut long by about 10 mm of the groove depth are provided.

  Therefore, in the metal pallet P, as shown in FIG. 1, the top plate 13 has the long plate pieces 13 a to 13 e on the upper plate 10 of the leg material A at equal intervals in the direction perpendicular to the upper plate 10. As shown in FIG. 4, the bottom walls of the upward fitting groove and the downward fitting groove that overlap each other are welded by spot welding s and assembled in a lattice shape with the upper plate 10 of the leg member A. At the time of this assembly, the top plate 13 is a downward fitting having long plate pieces 13a and 13e arranged at both ends in the length direction on the upper plate 10 among the long plate pieces 13a to 13e on the outer side in the width direction. The joining grooves 15 a and 15 c are configured to be welded in a state of protruding from the edge of the upper plate 10.

  On the other hand, the leg material A is fitted to the top plate 13 (13a, 13e) that protrudes from the both end edges of the upper plate 10 at the upper end of the second assembly plate piece 12b that is one step longer at both ends in the longitudinal direction. The standing wall portions are formed by fitting into the grooves 15a and 15c. As shown in FIG. 5, the one side portion 15f of the first assembly plate piece 12a is fitted into the fitting grooves 15a and 15c provided on both sides in the width direction of each standing wall portion. And the upper and lower ends of the assembly plate piece 12a are fitted into the fitting grooves 15a and 15c on both sides in the width direction of the upper plate 10 and the lower plate 11, respectively. The column 12 is formed in a channel shape with the upright wall portion, and is welded and fixed to the four corners of the side wall portion by arc welding a as shown in FIG. At the intermediate portion of the leg A, the pair of first assembly plate pieces 12a are opposed to each other, and the upper ends and the lower ends of the first assembly plate pieces 12a are fitted in the fitting grooves 15a and 15c on both sides in the width direction of the upper plate 10 and the lower plate 11, respectively. Thus, the support columns 12 are formed in parallel pairs, and are assembled by welding by arc welding b at the four corners of the first assembly plate piece 12a.

  In the illustrated metal pallet P, the leg A has the upper end 10 and the lower end 11 of the upper plate 10 and the lower plate 11 which are dangerous parts at the ends on both ends in the length direction. 2 The assembly plate pieces 12b are assembled by covering from the outside with the upper end and the lower end, and the safety is improved so as not to be injured in handling the pallet.

  Further, in the illustrated metal pallet P, the leg member A has been formed by bending the support column 12 into a channel shape with a simple flat plate in the past, but in the illustrated example, the fitting grooves 15a to 15e having a U-shaped cross section are provided. Since the assembly plate pieces 12a and 12b having a corrugated cross section formed alternately in the upper and lower directions are formed in a channel shape, the buckling (compression) strength is increased accordingly. Accordingly, since the leg material A has sufficient buckling strength with the channel-shaped support column 12 made of the assembly plate pieces 12a and 12b having a corrugated cross section at the parts on both ends in the length direction, the intermediate part of the leg material A is provided. Then, it is sufficient that the two first assembly plate pieces 12a having the same cross-sectional waveform are opposed to each other to form the support columns 12 in a bundle shape, and the entire pallet is light and convenient for handling by the amount of the metal plate pieces. It has become.

  Further, the illustrated metal pallet P includes the upper plate 10 and the lower plate 11 of the leg material A, the assembly plate pieces 12a and 12b of the support column 12, and the top plate 13, all of which are fitting grooves 15a to 15e having a U-shaped cross section. Are formed by bending plate pieces having a corrugated cross section formed alternately in the upper and lower sides, and the end edges of both side portions 15f in the width direction of each bending plate piece are fitted into the fitting grooves 15a,. 15c is bent inwardly and is provided with a pressing portion 15g having an L-shaped cross section on both side portions 15f. Therefore, rigidity is increased at both side portions 15f, and the assembly plate pieces 12a and 12b of the column 12 are fitted into the fitting grooves 15a. -When fitting by 15c and assembling, each plate piece is clamped by the groove side wall and the pressing part 15g which oppose in fitting groove 15a * 15c, and it has the structure where fitting strength is raised by this.

  Now, in the present invention, for example, if the assembly height of the leg member A is set higher than the standard and the height of the support 12 needs to be set to 150 mm, for example, according to a request from the user side, for example, it is conventionally desired. Although it is conceivable to press-mold a column having a height using a dedicated press bending die, in the illustrated example, the column 12 is formed from the same forming material F in accordance with the height of the leg material desired by the user. As shown by the middle chain line, the first assembly plate piece 12c is formed by cutting to a length of 150 mm, and the first assembly plate piece 12c is cut longer than the first assembly plate piece 12c by an approximate groove depth of 10 mm. Thus, the second assembly plate piece 12d is formed. Then, using these assembly plate pieces 12c and 12d, as described above, it is only necessary to assemble the support columns 12 in a channel shape and a pair bundle shape of the leg material A which is one step higher.

  On the other hand, although not shown in the drawing, the common forming material F is similarly applied to the case where the assembly height of the leg material A is set lower than the standard and therefore the height of the support column 12 needs to be set lower by one step, for example, 60 mm. The first assembly plate piece is cut to a length of 60 mm from the first assembly plate, and the second assembly plate piece is formed by cutting 10 mm longer than the first assembly plate piece. Similarly, it is only necessary to assemble the column 12.

  Next, an example of a method for manufacturing the above-described single-sided pallet type metal pallet P in the present invention will be described.

  First, the forming material F is adjusted to a predetermined pallet vertical size, and as shown in FIG. 2, a predetermined number of top plates 13 are formed by cutting into long plate pieces 13a to 13e each having a predetermined length. . On the other hand, the same forming material F is cut into long plate pieces 10a to 10c and 11a to 11c each having a predetermined length in accordance with a predetermined lateral size of the pallet, and the upper plate 10 and the lower plate 11 for the leg material are necessary. Mold as many as you like. On the other hand, the same forming material is cut into a relatively short desired length in accordance with an arbitrary assembly height of the leg material A, and a required number of assembly plate pieces constituting the support column 12 are formed. In the illustrated example, as described above, the first assembly plate piece 12a is formed by cutting to a length of 110 mm in accordance with the general standard assembly height of the leg A, and from the first assembly plate piece 12a. The second assembly plate piece 12b is formed by cutting the fitting groove of the upper plate 10 long by approximately the groove depth of 10 mm.

  Now, in the present invention, even if the assembly height of the leg member A is made higher than the standard and the height of the support 12 needs to be set to 150 mm, for example, at the request of the user, the support for the support 12 is used. At the time of forming the assembly plate piece, the first forming plate piece 12c is formed from the same forming material F according to the user-desired leg material height, as shown in FIG. The second assembly plate piece 12d may be formed by cutting 10 mm longer than the first assembly plate piece 12c.

  Next, the upper plate 10 (10a to 10c) is arranged at equal intervals with a predetermined interval, while the top plate 13 (13a to 13e) is arranged at a predetermined interval in a direction orthogonal to the upper plate 10 as shown in FIG. Are placed at equal intervals and stacked in a lattice pattern. At this time, the long plate pieces 13a and 13e of the top plate 13 disposed at both ends in the length direction of the upper plate 10 in the top plate 13 have the fitting grooves 15a and 15c on the outer side in the width direction as the end edges of the upper plate 10. Place it overhanging. Then, the bottom walls of the fitting grooves that overlap each other are welded by spot welding s (see FIG. 4) to assemble the grid-like top plate assembly 20.

  Then, as shown in FIG. 7, the top plate assembly 20 is turned upside down and placed so that the upper plate 10 faces upward with respect to the top plate 13. One end (the lower end in the figure) of the long second assembly plate piece 12b is fitted into the fitting groove 15a of the top plate 13 (13a) protruding from one end edge of the upper plate 10, and the upper plate 10 is also at the other end side. The standing wall portion of the column 12 is formed by fitting into the fitting groove 15 c of the top plate 13 (13 e) protruding from the other end edge of the column 12. Further, as shown in FIG. 5, one side portion 15f of the first assembly plate piece 12a is fitted and connected to the fitting grooves 15a and 15c provided on both sides in the width direction of the standing wall portions, and the assembly plate pieces are connected. One end (the lower end in the figure) of 12a is fitted into the fitting grooves 15a and 15c on both sides in the width direction of the upper plate 10, and side walls are erected. As shown in FIG. Assemble the struts 12 to. On the other hand, at the intermediate portion of the upper plate 10, the pair of assembly plate pieces 12 a are fitted into the fitting grooves 15 a and 15 c on both sides in the width direction of the upper plate 10, and the columns 12 are formed in parallel pairs. assemble.

  After that, as shown in FIG. 9, the lower plate 11 is placed on the column 12 standing on each upper plate 10 of the top plate assembly 20 from above, and the assembly plate piece 12 a that is one step shorter than the column 12 is opposed. When the middle and upper ends are fitted into the fitting grooves 15a and 15c on both sides in the width direction of the lower plate 11, and then welded by arc welding a and b at the four corners of the first assembly plate piece 12a (see FIG. 4), a metal pallet P is assembled into a single-sided pallet mold as shown in FIG.

  By the way, in the above illustrated embodiment, an example in which the present invention is applied to a metal pallet P assembled into a lattice-like single-sided pallet mold is shown. However, the present invention can be applied to the same lattice as shown below. It can also be applied to a metal pallet assembled into a double-sided pallet mold. FIG. 10 is an assembled perspective view of a double-sided pallet type metal pallet P ′ which is another example of the present invention, and FIG. 11 is an exploded perspective view thereof. In the illustrated other example, the same reference numerals are given to the same configuration and action as the single-sided pallet type metal pallet P, and the following description will be given.

  The metal pallet P ′ of the other example shown in the figure has a plurality of legs A in which a plurality of support columns 12 are sandwiched between the elongated upper plate 10 and the lower plate 11 (three in the other example shown in the figure). On the upper surface of the upper plate 10, a plurality of elongate top plates 13 (five other examples shown in the drawing) are juxtaposed and fixed in a direction orthogonal to the upper plate 10, while the lower surface of the lower plate 11 of the leg member A is A plurality of elongated bottom plates 25 (five other examples shown in the drawings) are fixed in a direction orthogonal to the plate 11 and assembled into a lattice-like single-sided pallet type as a whole.

  In the present invention, the metal pallet P ′ of the other example shown in the figure is the length obtained by bending the top plate 13 and the bottom plate 25 in the width direction sectional waveform as well as the upper plate 10, the lower plate 11 and the support column 12 of the leg material A. It is characterized in that the above-mentioned forming material F is used as a material (assembly material). And the baseplate 25 is formed using the long board pieces 25a-25e cut | disconnected by the predetermined length according to the predetermined pallet vertical size from the common forming material F similarly to the top plate 13. FIG. In addition, the support | pillar 12 of illustration other example is the 1st assembly board piece 12a cut | disconnected by length 110mm according to the assembly height of a general standard, and the upper board 10 and the lower board 11 from the 1st assembly board piece 12a. There are two types of second assembly plate pieces 12b that are cut long by a length of 20 mm, which is the total depth of the fitting grooves 15a to 15e.

  Therefore, in the metal pallet P ′, the bottom plate 25 is opposite to the top plate 13 described above, and the long plate pieces 25 a to 25 e are orthogonal to the lower plate 11 on the lower surface of the lower plate 11 of the leg material A, respectively. The bottom wall of the upward fitting groove and the downward fitting groove, which are juxtaposed at equal intervals in the direction, are welded by spot welding and assembled in a grid with the lower plate 11 of the leg material A. At the time of this assembly, the bottom plate 25 is an upward fitting having long plate pieces 25a and 25e arranged at both ends in the length direction on the lower surface of the lower plate 11 among the long plate pieces 25a to 25e. The joint grooves 15 a and 15 c are welded in a state of protruding from the edge of the lower plate 11.

  In the metal pallet P ′, the top plates 13 (13a, 13a,. 13e) is fitted into the fitting grooves 15a and 15c, and the lower ends thereof are fitted into the fitting grooves 15a and 15c of the bottom plates 25 (25a and 25e) protruding from both end edges of the lower plate 10, and the top plate 13 and the bottom plate 25 are fitted. An upright wall portion is formed therebetween, and one side portion 15f of the first assembly plate piece 15a is fitted into the fitting grooves 15a and 15c provided on both sides in the width direction of the upright wall portion, and the upper end of the first assembly plate piece 15a is inserted. And the lower end of the upper plate 10 and the lower plate 11 are fitted into the fitting grooves 15a and 15c on both sides in the width direction, and side walls are erected, and the side walls and the upright walls form a channel-like support column 12. . And it welds and fixes to the four corners of the 1st assembly board piece 12a by arc welding. On the other hand, at the intermediate portion of the leg member A, the pair of first assembly plate pieces 12a are opposed to each other, and the upper end and the lower end of each are fitted in the fitting grooves 15a and 15c on both sides in the width direction of the upper plate 10 and the lower plate 11, respectively. Thus, the support columns 12 are formed in parallel pairs, and are assembled by welding to the four corners of the first assembly plate piece 12a by arc welding.

  Accordingly, even in the metal pallet P ′, the leg A is a strut that is longer than the end (edge) E of the upper plate 10 and the lower plate 11, which are dangerous parts, at both ends in the longitudinal direction. Twelve second assembly plate pieces 12b are assembled by covering from the outside with the upper and lower ends of the second assembly plate pieces 12b, thereby enhancing the safety in handling the pallet.

  Now, even in the metal pallet P ′, if it is necessary from the user side, the assembly height of the leg material A is made higher than the standard, and therefore the height of the support column 12 needs to be set to 150 mm, for example. In the other example shown in the figure, the support column 12 is cut to a length of 150 mm from the same forming material F according to the height of the leg material desired by the user, as shown by a chain line in FIG. At the same time, the second assembly plate piece 12d is formed by cutting the first assembly plate piece 12c longer than the first assembly plate piece 12c by a length of 20 mm, which is the total groove depth of the fitting grooves 15a to 15e of the upper plate 10 and the lower plate 11. To do. Then, the assembly plate pieces 12c and 12d are used to assemble the support pillars 12 in a channel shape and a pair bundle shape of the leg material A which is one step higher.

  Next, an example of a method for manufacturing the above-described double-sided pallet type metal pallet P ′ in the present invention will be described.

  First, the forming material F is cut into long plate pieces 13a to 13e each having a predetermined length in accordance with a predetermined vertical size of the pallet to form a necessary number of top plates 13 and long plate pieces. A necessary number of bottom plates 25 are formed by cutting into 25a to 25e. On the other hand, the same forming material F is cut into long plate pieces 10a to 10c and 11a to 11c each having a predetermined length in accordance with a predetermined lateral size of the pallet, and the upper plate 10 and the lower plate 11 for the leg material are necessary. Mold as many as you like. On the other hand, the same forming material is cut into a relatively short desired length according to an arbitrary assembly height of the leg material A, and a required number of assembly plate pieces constituting the support column 12 are formed. In the illustrated example, as described above, the first assembly plate piece 12a is formed by cutting to a length of 110 mm in accordance with the general standard assembly height of the leg A, and the first assembly plate piece 12a. Further, the second assembly plate piece 12b is formed by cutting it longer by a length of 20 mm in which the approximate groove depths d of the fitting grooves 15a to 15e of the upper plate 10 and the lower plate 11 are combined.

  Particularly in the manufacturing method of the other example shown in the figure, when the assembly height of the leg member A is made higher than the standard and the height of the support column 12 needs to be set to 150 mm, for example, at the request of the user. However, at the time of molding of the assembly plate piece for the support column 12, the same forming material F is cut as it is according to the height of the leg material desired by the user, as shown by the chain line in FIG. The second assembly plate piece 12d may be formed by forming the first assembly plate piece 12c and cutting it into a length L5 that is 20 mm longer than the first assembly plate piece 12c.

  Next, the upper plates 10 (10a to 10c) are arranged in parallel at equal intervals with a predetermined interval, while the top plate 13 (13a to 13e) is oriented in a direction orthogonal to the upper plates 10 as shown in FIG. They are arranged in parallel at equal intervals with a predetermined interval and stacked in a lattice shape. At this time, the long plate pieces 13a and 13e of the top plate 13 disposed at both ends in the length direction of the upper plate 10 in the top plate 13 have the fitting grooves 15a and 15c on the outer side in the width direction as the end edges of the upper plate 10. Place it overhanging. Then, the bottom walls of the fitting grooves overlapping each other are welded by spot welding to assemble the grid-like top plate assembly 20.

  In addition, the lower plates 11 (11a to 11c) are arranged in parallel at equal intervals with a predetermined interval, while the bottom plates 25 (25a to 25e) are arranged at equal intervals in a direction orthogonal to the upper plate 10. Adjacent to each other and stacked in a grid. At this time, in the bottom plate 25, the long plate pieces 25 a and 25 e of the bottom plate 25 disposed at both ends in the length direction of the lower plate 11 have the fitting grooves 15 a and 15 c on the outer side in the width direction protruding from the edge of the lower plate 11. Arrange in the state. Then, the bottom walls of the fitting grooves that overlap each other are welded by spot welding, and the lattice-shaped bottom plate assembly 30 is similarly assembled.

  Then, the top plate assembly 20 is turned upside down and placed so that the upper plate 10 is on the upper side, and one end of the second assembly plate piece 12b that is one step higher is placed on the upper plate 10 at one end in the longitudinal direction. The top plate 13 (13e) protruding from the other end edge of the upper plate 10 is fitted into the fitting groove 15a of the top plate 13 (13a) protruding from the one end edge of the plate 10, and the other end side of the opposite side of the top plate 13 (13e). The standing wall portion of the support column 12 is formed by fitting into the fitting groove 15c. Further, the one side portion 15f of the first assembly plate piece 12a is fitted and connected to the fitting grooves 15a and 15c provided on both sides in the width direction of each standing wall portion, and one end of the first assembly plate piece 12a is connected to the upper plate. 10 are fitted into the fitting grooves 15a and 15c on both sides in the width direction, and the side walls are erected. And the support | pillar 12 is assembled in a channel shape by a side wall part and a standing wall part. On the other hand, at an intermediate portion of the upper plate 10, a pair of assembly plate pieces 12 a are fitted into fitting grooves 15 a, 15 c on both sides in the width direction of the upper plate 10, and support columns are formed in a parallel parallel pair. 12 is assembled.

  After that, each lower plate 11 of the grid-like bottom plate assembly 30 is covered from above with a column 12 standing on each upper plate 10 of the top plate assembly 20, and one short assembly plate piece 12 a facing the column 12. When the upper ends in FIG. 10 are fitted in the fitting grooves 15a and 15c on both sides in the width direction of the lower plate 11, and then welded by arc welding at the four corners of each first assembly plate piece 12a, the metal pallet P ′ is shown in FIG. It is assembled into a double-sided pallet mold as shown in

  In the manufacturing method of the present invention for assembling into a double-sided pallet type, after assembling the top plate assembly 20 and the bottom plate assembly 30, the column 12 is erected on the bottom plate assembly 30, contrary to the illustrated example. After that, the metal pallet P ′ can be assembled into a double-sided pallet mold by the procedure of covering the upper plate 10 of the top plate assembly 20 on the support columns 12.

  That is, the bottom plate assembly 30 is placed in the direction in which the lower plate 11 is on the upper side, and one end of the second assembly plate piece 12b that is one step longer is placed on the lower plate 11 at a portion on one end side in the length direction of the lower plate 11. It fits into the fitting groove 15a of the bottom plate 25 (25a) protruding from the one end edge, and into the fitting groove 15c of the bottom plate 25 (25e) protruding from the other end edge of the lower plate 11 at the opposite end portion. The standing wall portion of the column 12 is formed by fitting. Further, the one side portion 15f of the first assembly plate piece 12a is fitted and connected to the fitting grooves 15a and 15c provided on both sides in the width direction of each standing wall portion, and one end of the first assembly plate piece 12a is connected to the upper plate 10. The side walls are erected by fitting into the fitting grooves 15a and 15c on both sides in the width direction. And the support | pillar 12 is assembled in a channel shape by a side wall part and a standing wall part. On the other hand, at the intermediate portion of the lower plate 11, a pair of assembly plate pieces 12a are fitted into fitting grooves 15a and 15c on both sides in the width direction of the lower plate 11 so as to be opposed to each other in parallel parallel bundles. 12 is assembled.

  Thereafter, the upper plate 11 of the top plate assembly 20 is placed on the column 12 standing on the lower plate 11 of the bottom plate assembly 30 from above, and the assembly plate piece 12a that is one step shorter than the column 12 is shown. The middle and upper ends are fitted into the fitting grooves 15a and 15c on both sides in the width direction of the upper plate 10, and then welded by arc welding at the four corners of each first assembly plate piece 12a, so that the metal pallet P 'is made into a double-sided pallet type. assemble.

It is an assembly perspective view of the metal pallet which is an example of the present invention. It is a disassembled perspective view of the metal pallet. (A) is a principal part expansion perspective view of the forming material to be used, (B) is an end view. It is a partial expansion perspective view of metal pallets. It is a perspective view which decomposes | disassembles and shows a part of leg material. It is a perspective view which shows the top plate assembly of metal pallets. It is a perspective view which shows the middle of the assembly which forms the standing wall part of a support | pillar in a top plate assembly. It is a perspective view which shows the step which formed the support | pillar upright. It is a perspective view which shows the step which covers a lower board on a support | pillar, and forms a leg material. It is an assembly perspective view of the metal pallet of a double-sided pallet type which is another example of the present invention. It is a disassembled perspective view of the metal pallet.

Explanation of symbols

A Leg material F Forming material P / P 'Metal pallet a / b Arc welding site s Spot welding site 10 (10a to 10c) Upper plate 11 (11a to 11c) Lower plate 12 Column 12a First assembly plate piece 12b of column Column second assembly plate piece 13 (13a-13e) Top plate 15a-15e Forming material fitting groove 20 Top plate assembly 25 (25a-25e) Bottom plate 30 Bottom plate assembly

Claims (4)

A plurality of leg members sandwiching a plurality of struts with a space in the length direction between an elongated upper plate and a lower plate are juxtaposed at intervals, and the upper plate of the leg material is orthogonal to the upper plate. In a metal pallet in which a plurality of elongate top plates are juxtaposed at intervals to be fixed,
Each of the top plate, the upper plate, the lower plate, and the support of the leg member is a long metal thin plate that is bent and formed into a corrugated cross-sectional shape in which a fitting groove having a U-shaped cross section is alternately formed upward and downward in the width direction. Using forming material as material,
The top plate, the upper plate and the lower plate of the leg material are formed using a long plate piece cut to a predetermined length from the forming material according to a predetermined pallet vertical and horizontal length,
The top plate has the long plate pieces arranged at both ends in the length direction on the upper plate of the leg material, and the downward fitting grooves each extending outward in the width direction project from the edge of the upper plate. While welding in state
The column is
Assembled using an assembly plate piece cut to a desired length from the forming material according to an arbitrary assembly height of the leg material, and at both ends of the leg material, the upper end of the assembly plate piece is connected to the upper plate. A vertical wall portion is provided by fitting into the fitting groove of the top plate protruding from the edge of the top plate, and the one side edge of the assembly plate piece is fitted into the fitting groove provided on both sides in the width direction of the vertical wall portion. The upper and lower ends of the assembly plate pieces are fitted into the fitting grooves on both sides in the width direction of the upper plate and the lower plate, respectively, so that side wall portions are erected, and the side wall portions and the standing wall portions are formed in a channel shape. The pair of assembly plate pieces are opposed to each other between both ends of the legs, and the upper and lower ends of each of the leg members are fitted into the fitting grooves on both sides in the width direction of the upper plate and the lower plate, respectively. A metal pallet formed in a bundle. A plurality of leg members sandwiching a plurality of struts with a space in the length direction between an elongated upper plate and a lower plate are juxtaposed at intervals, and the upper plate of the leg material is orthogonal to the upper plate. In the method of manufacturing a metal pallet that is fixed by juxtaposing a plurality of top plates elongated in the direction to be
A long metal sheet forming material bent into a corrugated cross-section in which cross-sectional fitting grooves are alternately formed upward and downward in the width direction is used as a raw material, and the forming material is adjusted to a predetermined pallet vertical and horizontal length, respectively. The top plate and the upper and lower plates of the leg material are formed by cutting to a predetermined length, while the same forming material is cut to a desired length according to an arbitrary assembly height of the leg material. And forming a plurality of assembly plate pieces constituting the column,
Next, the upper plates are juxtaposed in parallel with each other, while the top plates are stacked in parallel in a direction perpendicular to the upper plates, and both ends of the upper plate in the longitudinal direction are arranged in the top plates. The top plate is arranged in a state where the fitting groove on the outer side in the width direction protrudes from the edge of the upper plate, and the bottom walls of the fitting groove that overlap each other are welded by spot welding to form a lattice. Assemble the top plate assembly
Then, the top plate assembly is oriented so that the upper plate is on the upper side, and at both ends of the upper plate, one end of the assembly plate piece is fitted to the top plate protruding from the edge of the upper plate. A standing wall portion is formed by fitting into the groove, and one side edge of the assembly plate piece is fitted and connected to the fitting groove provided on both sides in the width direction of the standing wall portion, and one end of the assembly plate piece is connected to the upper plate. The side walls are erected by fitting into the fitting grooves on both sides in the width direction, and the support column is formed in a channel shape with the side walls and the standing wall part, while a pair of the upper plate between the both ends. The assembly plate pieces are made to face each other, one end of each is fitted into the fitting grooves on both sides in the width direction of the upper plate, and the columns are formed in parallel pairs.
After that, the lower plate is put on the support column which stands on each upper plate of the top plate assembly, and the upward other end of the parallel assembly plate piece facing the support column is set in the width direction of the lower plate. A method for manufacturing a metal pallet, which is assembled by fitting into fitting grooves on both sides and then welding by arc welding. A plurality of leg members sandwiching a plurality of struts with a space in the length direction between an elongated upper plate and a lower plate are juxtaposed at intervals, and on the upper surface of the upper plate of the leg members, the upper plate and A plurality of elongate top plates are juxtaposed and fixed in a direction orthogonal to each other, while a plurality of elongate bottom plates are fixed to a lower surface of the lower plate of the leg material in a direction orthogonal to the lower plate with a gap between them. In metal pallets,
Each of the top plate, the upper plate, the lower plate, and the support column of the leg member, and the bottom plate are each formed by bending a cross-sectional corrugated groove having a cross-sectionally U-shaped fitting groove alternately in the width direction. Using a thin metal sheet forming material,
The top plate, the upper plate and the lower plate of the leg material, and the bottom plate are each formed using a long plate piece cut to a predetermined length from the forming material according to a predetermined pallet vertical and horizontal length,
The top plate has the long plate pieces arranged at both ends in the length direction on the upper plate of the leg material, and the downward fitting grooves each extending outward in the width direction project from the edge of the upper plate. Welded in state,
The bottom plate protrudes from the edge of the lower plate by one upward fitting groove having the long plate pieces arranged at both ends in the length direction of the lower plate of the leg material, respectively on the outer side in the width direction. While welded in a state,
The column is
Assembled using an assembly plate piece cut to a desired length from the forming material according to an arbitrary assembly height of the leg material, and at both ends of the leg material, the upper end of the assembly plate piece is connected to the upper plate. Is fitted into the fitting groove of the top plate protruding from the edge of the bottom plate, the lower end of the assembly plate piece is fitted into the fitting groove of the bottom plate protruding from the edge of the lower plate, and a standing wall portion is provided. The one side edge of the assembly plate piece is fitted in the fitting groove provided on both sides in the width direction of the standing wall portion, and the upper end and the lower end of the assembly plate piece are fitted on the both sides in the width direction of the upper plate and the lower plate, respectively. The side wall portion is erected by being fitted in the groove, and the side wall portion and the standing wall portion are formed in a channel shape, while a pair of the assembly plate pieces are opposed to each other between the both end portions of the leg member. The upper end and the lower end are fitted into fitting grooves on both sides in the width direction of the upper plate and the lower plate, respectively, so as to form parallel pairs. That, a metal pallet. A plurality of leg members sandwiching a plurality of struts with a space in the length direction between an elongated upper plate and a lower plate are juxtaposed at intervals, and on the upper surface of the upper plate of the leg members, the upper plate and A plurality of elongate top plates are juxtaposed and fixed in a direction orthogonal to each other, while a plurality of elongate bottom plates are fixed to a lower surface of the lower plate of the leg material in a direction orthogonal to the lower plate with a space between them. In the method for manufacturing a metal pallet,
A long metal sheet forming material bent into a corrugated cross-section in which cross-sectional fitting grooves are alternately formed upward and downward in the width direction is used as a raw material, and the forming material is adjusted to a predetermined pallet vertical and horizontal length, respectively. The top plate, the top plate and the bottom plate of the leg material, and the bottom plate are formed by cutting to a predetermined length, while the same forming material is formed to a desired length according to an arbitrary assembly height of the leg material. Cut into a plurality of assembly plate pieces constituting the support column,
Next, the upper plates are juxtaposed in parallel with each other, while the top plates are stacked in parallel in a direction perpendicular to the upper plates, and both ends of the upper plate in the longitudinal direction are arranged in the top plates. The top plate is arranged in a state where the fitting groove on the outer side in the width direction protrudes from the edge of the upper plate, and the bottom walls of the fitting groove that overlap each other are welded by spot welding to form a lattice. And assembling the bottom plate in parallel with a space therebetween, while placing the bottom plates in a direction perpendicular to the bottom plate and placing them side by side in parallel to each other, The bottom plates arranged at both ends in the plate length direction are arranged in a state where the fitting grooves on the outer side in the width direction protrude from the edge of the lower plate, and spot welding is performed between the bottom walls of the fitting grooves that overlap each other. Assemble the grid-shaped bottom plate assembly with
Then, the top plate assembly is oriented so that the upper plate is on the upper side, and at both ends of the upper plate, one end of the assembly plate piece is fitted to the top plate protruding from the edge of the upper plate. A standing wall portion is formed by fitting into the groove, and one side edge of the assembly plate piece is fitted and connected to the fitting groove provided on both sides in the width direction of the standing wall portion, and one end of the assembly plate piece is connected to the upper plate. The side walls are erected by fitting into the fitting grooves on both sides in the width direction, and the support column is formed in a channel shape with the side walls and the standing wall part, while a pair of the upper plate between the both ends. The assembly plate pieces are made to face each other, one end of each is fitted into the fitting grooves on both sides in the width direction of the upper plate, and the columns are formed in parallel pairs.
Alternatively, the bottom plate assembly is oriented in such a way that the lower plate is on the upper side, and at both ends of the lower plate, one end of the assembly plate piece is inserted into a fitting groove of the bottom plate protruding from the edge of the lower plate. A standing wall portion is formed by fitting, and one side edge of the assembly plate piece is fitted and connected to a fitting groove provided on both sides in the width direction of the standing wall portion, and one end of the assembly plate piece is connected to the width of the lower plate. The side walls are erected by fitting into the fitting grooves on both sides in the direction, and the pillars are formed in a channel shape by the side walls and the vertical wall, while a pair of the assemblies is formed between both ends of the lower plate. The plate pieces are opposed to each other, and one end of each is fitted into the fitting grooves on both sides in the width direction of the lower plate to form the struts in parallel pairs.
After that, the lower plate of the bottom plate assembly is put on the support column which stands on each upper plate of the top plate assembly, and the upward other end of the parallel assembly plate piece facing the support column is After fitting into the fitting grooves on both sides in the width direction of the lower plate, welding and assembling by arc welding,
Alternatively, the upper plate of the top plate assembly is placed on the support column which stands on each lower plate of the bottom plate assembly, and the upper opposite end of the parallel assembly plate piece facing the support column is connected to the upper plate. A method for manufacturing a metal pallet, which is assembled by fitting into fitting grooves on both sides in the width direction of the plate and then welding and assembling by arc welding.

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