shelf

Abstract

To provide a method for manufacturing an assembly-type shelf that can be produced from flat plates and can significantly reduce the number of fastening points using threaded members without any welded joints.SOLUTION: A method for manufacturing a column of an assembly-type shelf, which is fabricated by bending a sheet material comprises: a cutting step A of cutting a pair of column members from the sheet material into a predetermined shape; a threaded hole processing step B of forming female threads by pre-drilling and tapping; a bending step C of bending to form an approximately L-shaped cross-section in the longitudinal direction; and an assembling step D of fixing to respective coupling portions provided at ends of the column members by using threaded members.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an assembly type shelf, and more particularly to a manufacturing technique for an assembly type shelf that can be manufactured from flat plates and has no welding points and requires very few fastening points using screw members. [Background technology]

[0002] Metal shelves are primarily made from steel pipes and are used in harsh environments such as logistics warehouses that handle products of various sizes and heavy materials, or production factories that handle a lot of heavy items such as tools and metal parts. For this reason, the joints between vertically placed column members and horizontally placed cross members are often firmly joined by welding, and when fastening with threaded members such as bolts, multiple bolts are used in one place to ensure the rigidity of the shelves.

[0003] Furthermore, conventional assembly methods that simply fasten items with bolts require a great deal of skill and knowledge, such as temporary fastening, the order in which bolts are tightened, final tightening, and checking for any missed tightenings, and it is not uncommon for the entire unit to warp or become unstable after completion.Furthermore, once shelves are welded, it is difficult to easily increase the number of shelves or change their height, and it is also difficult to adapt them to the detailed dimensions of each site.

[0004] Among the existing light-medium-duty racks, there are also prefabricated steel shelves that can be easily assembled without using a single bolt, making them easy to use even for those unfamiliar with assembly work.However, pallet racks used in production factories where the shelves themselves are moved and heavy items are moved in and out require a large load capacity as well as strength against vibration, and these are not able to meet these requirements.

[0005] In light of this situation, various technical proposals have been made. The title of the invention is "A manufacturing method for a shelving device and a support column used therein," and the problem to be solved is "To provide an L-shaped, hollow sheet metal support column with excellent strength, appearance, and dimensional accuracy." The specific solution is described as "The support column has an outer plate connected to the outer plate in an L-shape in plan view, an outer end plate connected to the outer plate, an inner plate connected to the outer end plate, and an inner end plate connected to the inner plate. A nut is attached to the inner surface of the inner plate. The peripheral wall of the shelf is also hollow, and a connecting metal fitting is welded to a protruding portion of the inner peripheral wall, and the protruding portion, the connecting metal fitting, and the inner plate are fastened together with a bolt. A slit is formed in a portion of the first fold, which is the boundary between the inner end plate and the inner plate, on the side of the nut. When bending the inner end plate, the area where the nut is located cannot be held with a clamping die, but the slit allows the inner end shelf plate to be bent without hindrance." However, this technology involves a configuration in which a hollow section is provided in a sheet metal support formed into an L-shape, which requires many bending operations, and the connecting fittings that receive this are joined by welding, and the connecting fittings and the inner plate are further fastened together with bolts, so the problem of eliminating welded points, which is the objective of the present invention, is not solved.

[0006] The invention is titled "Steel piece for external diaphragm, column-beam joint structure and column-beam joint method," and the problem to be solved is described as "reducing the gap that occurs between the external diaphragm and the corner of the square steel pipe column by a simple process." The specific solution is described as "Providing a steel piece for external diaphragm that has a straight portion that extends in the longitudinal direction and corresponds to the shape of the flat portion on the periphery of the square steel pipe column, and a bending portion that is adjacent to the straight portion in the longitudinal direction and has multiple grooves formed in one direction that intersects with the longitudinal direction, so that it can be bent along the corner of the periphery of the square steel pipe column." Also provided is a column-beam connection structure comprising a square steel pipe column having a flat plate portion and corner portions on its outer periphery, an outer diaphragm joined to the outer periphery of the square steel pipe column, and a steel beam joined to the outer diaphragm, wherein the outer diaphragm is formed from a steel piece for the outer diaphragm having a straight portion joined to the flat plate portion and a bent portion adjacent to the straight portion and having multiple grooves formed on either the surface contacting the square steel pipe column or the surface opposite the square steel pipe column, thereby bending along the corner and joining to the corner. However, the technology in question is a method for joining a square steel pipe column as a column member and an H-shaped steel beam as a cross member, and the assembly method is welding, so the technical means for solving the problem is different.

[0007] The invention is titled "Storage Shelf and Manufacturing Method Thereof," and the objective is to "provide a storage shelf and manufacturing method therefor that has a simple structure, is easy to clean, and has a structure that is resistant to dust and moisture accumulation." The specific solution is described as follows: "A pair of stainless steel plates each have a cut parallel to one side, and short cuts extending from both ends of the cut in a direction intersecting the cut and extending in the same direction at both ends. Multiple cuts are formed parallel to each other at a predetermined interval in the stainless steel plates, and the area surrounded by the cuts is bent inward at a right angle to the plate surface to form a locking edge. The bent locking edge is fixed to a predetermined lower frame, facing each other." This technology has a simple structure in that it adds strength by bending a pair of stainless steel plates vertically, and then makes multiple horizontal cuts where shelves are placed, and is easy to assemble. However, it cannot accommodate heavy objects and is thought to be capable of storing relatively light-weight products, and its effects differ significantly from the present invention, which is intended to accommodate heavy objects. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Patent Publication No. 2014-155573 [Patent Document 2] Patent Publication No. 2022-68669 [Patent Document 3] JP 2004-194732 A Summary of the Invention [Problem to be solved by the invention]

[0009] An object of the present invention is to provide a technique for an assembly type shelf that can be manufactured from flat plates and has no welding points and can minimize the number of fastening points using screw members or rivets. [Means for solving the problem]

[0010] The present invention is a manufacturing method for producing columns for an assembled shelf made by bending sheet material, and employs a configuration including the following steps: a column member cutting process A, in which a pair of column members are cut from the sheet material into a predetermined shape; a column member screw hole processing process B, in which a female thread is formed by drilling and threading; a column member bending process C, in which the column members are bent in the longitudinal direction so that the cross section becomes approximately L-shaped; and a column member assembly process D, in which the column members are fixed with screw members to each of the joints provided at the ends of the column members.

[0011] The present invention also provides a method for manufacturing an assembled shelf consisting of square steel columns and cross members, in which the manufacturing process for the square steel columns includes a column member cutting process A in which a pair of column members are cut from plate material to a predetermined shape, a threaded column member hole processing process B in which female threads are formed by pilot holes and threading, a column member bending process C in which the column members are bent in the longitudinal direction so that the cross section is approximately L-shaped, and a column member assembly process D in which the column members are fixed to each connecting portion provided at the end of the column members with screw members, and the manufacturing process for the cross members includes a cross member cutting process E in which the plate material is cut to a predetermined shape, a cross member screw hole processing process F in which bolt holes are formed, and a cross member bending process G in which the column members are bent in the longitudinal direction so that the cross section is approximately L-shaped, and a shelf assembly process H in which the square steel columns and cross members are joined can also be adopted.

[0012] The present invention can also adopt a configuration in which a pair of column members are bent in the longitudinal direction so that the cross section is approximately L-shaped, and are combined to form a square steel column that is fixed to a connecting portion provided at the end using a screw member.

[0013] The present invention can also adopt a configuration in which the shelf is composed of the square steel column and a cross member, and the cross member is connected to the square steel column by a screw member via a connecting portion or connecting plate provided at the end.

[0014] Furthermore, the present invention can also adopt a connection structure for a partition member to be installed on a shelf using the square steel column and the cross member, in which an insertion piece is provided at the end of the partition member, an insertion groove is provided in the bottom plate into which the insertion piece is inserted, and a fixing plate is fixed by the screw member with the insertion piece inserted into the insertion groove.

[0015] The present invention may also employ a configuration in which curved portions are provided at the upper corners of the partition member, and the curved portions are grooves having a plurality of slit-like, V-shaped, or trapezoidal planar shapes. [Effects of the Invention]

[0016] Furthermore, according to the shelf manufacturing method of the present invention, the shelves can be manufactured by cutting them out from flat plate material, which provides the excellent effect of allowing for a high degree of freedom in design, such as detailed size changes and desired dimensions, and allowing manufacturing without being restricted by the size of standardized molded parts.

[0017] Furthermore, the shelf manufacturing method according to the present invention has the excellent advantage that it does not have any welded parts, so it is not affected by the heat from welding, and can be assembled without affecting the skill of the worker performing the welding.

[0018] Furthermore, with the shelf manufacturing method of the present invention, the square steel columns and cross members that make up the shelf can be joined by fastening them with screw members at one or two points on each end. Therefore, assembly can be completed with an extremely small amount of screwing work, which has the excellent effect of shortening lead time.

[0019] Furthermore, when the shelf according to the present invention is configured to include a partition member, it has the excellent effect of eliminating the need for equipment such as a dedicated hydraulic bender using dedicated jigs and molds, and making it possible to create curved shapes from sheet metal at low cost. [Brief explanation of the drawings]

[0020] [Figure 1]FIG. 2 is a process explanatory diagram showing each step required for the manufacturing method of a square steel column according to the present invention. [Figure 2] 1 is a process explanatory diagram showing the manufacturing process of an assembly shelf manufactured by combining square steel columns and cross members according to the present invention. FIG. [Figure 3] FIG. 1 is a basic configuration explanatory diagram illustrating the basic configuration of a square steel column according to the present invention. [Figure 4] FIG. 2 is a diagram illustrating the basic configuration of a cross member according to the present invention. [Figure 5] 1 is a diagram illustrating a basic configuration of an assembly shelf according to the present invention; [Figure 6] 1 is an explanatory diagram illustrating an embodiment of a configuration in which a bottom plate is attached to an assembly shelf according to the present invention and further includes a partition member. [Figure 7] 3A and 3B are explanatory diagrams illustrating the configuration of a partition member according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0021] The present invention is a manufacturing method for producing columns 20 of an assembly shelf manufactured by bending a plate material 10, and is characterized by including a cutting process A in which a pair of column members 21 are cut into a predetermined shape from the plate material 10, a tapped hole processing process B in which female threads 30 are formed by drilling pilot holes and threading, a bending process C in which the column members 21 are bent in the longitudinal direction so that their cross sections have a substantially L-shape, and an assembly process D in which screw members 31 are fastened to the respective connecting portions 22 provided at the ends of the column members 21. The following description will be made based on the drawings. However, the shape and configuration are not limited to those shown in the drawings, and modifications can be made within the scope of the effects achieved as a creation of the technical idea of ​​the present invention.

[0022] 1 is a process explanatory diagram showing each step required for the method of manufacturing a square steel column according to the present invention. Each step will be explained below.

[0023] The manufacturing method 1 for a square steel column includes a cutting process A, a screw hole processing process B, a bending process C, and an assembly process D. Specifically, blanks cut out from flat steel material using a laser processing machine or a wire cutting machine are subjected to plastic processing by bending to produce a pair of column members 21, which are long objects with a roughly L-shaped cross section, and these are then combined and joined with screw members to manufacture a square steel column 2.

[0024] The pillar member cutting process A is a process of cutting a flat plate into a predetermined shape, specifically a process of cutting out a blank by shearing, laser processing, electric discharge processing, or the like.

[0025] Process B of processing the threaded hole in the pillar member is a process of forming a female thread to enable fastening with a threaded member. Specifically, it is a process of drilling a pilot hole that matches the nominal diameter of the tap and then threading the hole with the tap.

[0026] The column component bending process C is a processing step in which a flat blank is bent into an angle. When angle bars are used, they are limited to standard dimensions, making it difficult to make detailed size changes or to accommodate specific on-site requirements. In this regard, bending processing allows for greater freedom in design.

[0027] The column member assembly process D does not require welding, which is a feature of the present invention, and allows assembly processing with as few screw members as possible; specifically, for example, when forming a square steel column 2, it can be assembled by screwing only at two points on both ends. Furthermore, when connecting and assembling the horizontal member 40 to the vertical square steel column 2, this is the process of assembling the shelf 3 by inserting the screw member 31 into the bolt hole opened in the connecting portion 41 of the horizontal member 40 and fastening it to the female threaded portion made in the square steel column 2.

[0028] FIG. 2 is a process explanatory diagram showing each step in the method of manufacturing a knockdown shelf according to the present invention, which is manufactured by combining square steel columns and cross members.

[0029] The pillar member cutting process A is a process of cutting a flat plate into the shape of a pillar member, specifically a process of cutting out a blank by shearing, laser processing, electric discharge processing, or the like.

[0030] The pillar member threaded hole processing process B is a process of forming a female thread that enables a set of pillar members to be fastened with a threaded member. Specifically, it is a process of drilling a pilot hole that matches the nominal diameter of the tap and then threading it with the tap. If a laser combined processing machine is used, the pillar member cutting process A and the pillar member threaded hole processing process B can be performed simultaneously, which eliminates the need to repeatedly remove and install the workpiece from the processing machine. This is advantageous because it reduces the number of processes, shortens the lead time, and minimizes the impact on processing accuracy.

[0031] The column component bending process C is a processing step in which a flat blank is bent into an angle. When using angled sections, the process is limited to standard dimensions, making it difficult to make detailed size changes or to accommodate specific on-site requirements. In this regard, bending from plate material allows for greater freedom in design.

[0032] The column member assembling process D does not require welding, which is a feature of the present invention, and allows assembly processing with as few screw members as possible; specifically, for example, when forming the square steel column 2, it can be assembled by connecting with screws at only two points on both ends. Furthermore, when connecting and assembling the horizontal member 40 to the vertical square steel column 2, the shelf 3 can be assembled simply by inserting the screw member 31 into the bolt hole opened in the connecting portion 41 of the horizontal member 40 and fastening it to the female thread provided in the square steel column 2.

[0033] The cross member cutting process E is a process of cutting a flat plate so that it will be bent into the desired shape of the cross member, and specifically, it is a process of cutting out a blank by shearing, laser processing, electric discharge processing, etc.

[0034] The cross member screw hole processing process F is a process of forming bolt holes in the cross member 40 to enable fastening to the square steel column 2 with the screw member 31. If a laser processing machine is used, the cross member cutting process E and the cross member screw hole processing process F can be performed simultaneously, which eliminates the need to repeatedly remove and install the workpiece from the processing machine, and is advantageous because it reduces the number of processes, shortens the lead time, and also makes it possible to minimize the impact on processing accuracy.

[0035] The cross member bending process G is a processing step in which a flat plate material 10 is bent into a channel shape. If a standard channel material is used, it is limited to standard dimensions, making it impossible to respond to detailed size changes or dimensions depending on the site. In this regard, bending the plate material 10 allows for greater design freedom.

[0036] The shelf assembly process H does not require welding, which is a feature of the present invention, and allows assembly processing with as few screw threads as possible. Specifically, for example, when connecting and assembling the horizontal cross member 40 to the square steel column 2 obtained in the column member assembly process D, the shelf 3 can be assembled simply by inserting the screw thread 31 into the bolt hole opened in the connecting portion 41 of the cross member 40 and fastening it to the female thread portion provided in the square steel column 2.

[0037] 3 is a diagram illustrating the basic configuration of a square steel column according to the present invention. Fig. 3(a) shows the state of a column member 21 cut from a standardized steel plate of a fixed length or the like in the column member cutting process A, Fig. 3(b) shows the column member 21 cut from a flat plate by shearing, laser processing, or the like in the column member cutting process A, Fig. 3(c) shows the state before a pair of column members 21, which have been bent at predetermined locations on the cut blank, are faced together and assembled, and Fig. 3(d) shows the square steel column 2 in the completed assembled state. Note that the scribing on the standardized plate of a fixed length or the like in Fig. 3(a) is not actually performed, but is an example of image information showing the cutting of parts, and it is preferable to devise an arrangement so as not to waste material.

[0038] The square steel column 2 is a square column formed by combining a pair of column members 21, which are long and approximately L-shaped in cross section, by plastic processing through bending a blank cut out of flat steel material using a laser processing machine or a wire cutting machine, and connecting them with a screw member.

[0039] The plate material 10 is a flat material made of metal such as iron, stainless steel, or aluminum, and since fixed-length steel plates or the like can be used, there is a wide range of freedom in selecting thickness and the like.

[0040] The columns 20 are structural members arranged vertically at the four corners of the shelf 3, and correspond to the square steel columns 2 of the present invention.

[0041] The column members 21 refer to each of a pair of members constituting the column 20 and the square steel column 2, each of which is formed by bending a blank cut out from a flat steel material to have a substantially L-shaped cross section.

[0042] The connecting portion 22 is a flat portion that is further folded back from the folded end surface 23 provided at the end of the pillar member 21, and is provided with a female thread portion 30 for connecting, for connecting a pair of pillar members 21 to each other.

[0043] The folded end surface 23 is a flat portion that is folded back at the end of the column member 21. It is desirable that the folded end surface 23 be provided with a female thread portion 30 that allows the base 24 to be attached.

[0044] The female threaded portion 30 is a threaded portion that corresponds to and receives a male-threaded threaded member 31 such as a bolt that is necessary for fastening a pair of column members 21 together and for fastening a square steel column 2 and a cross member 40.

[0045] The threaded member 31 is a bolt or similar device required for fastening a pair of column members 21 together and a square steel column 2 to a cross member 40. When the female threaded portion 30 is tightened with a threaded member 31, such as a bolt with a male thread, a compressive force is applied to the seating surface, and the tightened part exerts a repulsive force against the threaded member 31. At this time, a large frictional force is generated between the seating surface and the part, which allows for the fastening (fastening). Rivets are also used as fastening members similar to the threaded member 31. Rivets consist of a head and a threadless body. They are inserted into drilled parts and joined (crimped) by plastically deforming the opposite end with a dedicated tool. It is also preferable to use rivets and threaded members 31 appropriately. Rivets are inexpensive, contributing to cost reduction. Furthermore, blind rivets, among other rivets, can be used to fasten parts even in places where the inserted body is not visible. A blind rivet consists of a body (flange) with a flange that extends out from the barrel, combined with a mandrel (shaft) core rod.The mandrel is pulled up with a special tool called a riveter, causing the body to plastically deform and allowing the rivet to be fastened.Since it can be fastened from one side of the base material, it is suitable for fastening areas where it is difficult to reach the back of the fastening part with a jig, sealed areas, and areas where it is difficult to handle tools.

[0046] 4A and 4B are explanatory diagrams illustrating the basic configuration of a cross member according to the present invention, in which Fig. 4A shows a plan view of a cross member 40 cut in cross member cutting step E, and Fig. 4B shows the cut cross member 40 in a bent state. Note that the connecting portion 41 has bolt holes that allow fastening with two screw members 31 at one location, but this is an embodiment in which it is positioned so that the cross member can be provided at a more right angle to the square steel column 2.

[0047] Although not specifically shown in the drawings, the connecting plate 42 is a connecting metal fitting that is provided separately from the cross member 40 and the square steel column 2. The connecting plate 42 is not an essential member and is used as needed.

[0048] FIG. 5 is a diagram illustrating the basic configuration of the assembled shelf according to the present invention. As shown in FIG. 5, the manufacturing method of the shelf according to the present invention and the shelf are constructed as a whole by using square steel columns 2 assembled as columns 20, which serve as vertical members, and fastening them to cross members 40, which serve as horizontal members, with screw members 31.

[0049] The shelf 3 is a shelf (storage equipment such as racks, pallets, and nesters) consisting of square steel columns 2 and cross members 40, and is assembled by arranging the square steel columns 2 on all four sides, spanning the cross members 40, and using screw members 31 via connecting parts 41 or connecting plates 42 provided at the ends of the cross members 40.

[0050] The cross members 40 are members that connect horizontally to the square steel columns located at the four corners, and are members that are processed by bending a flat plate 10 into a channel shape by bending it twice or four times. In addition, the ends of the cross members 40 are provided with connecting parts 41, and the cross members 40 are members that are firmly fixed to the square steel columns 2 by screw members 31 via the connecting parts 41.

[0051] The connecting portion 41 is a flat portion integrally formed at the end of the cross member 40, and the connecting portion 41 has a bolt hole formed therein for inserting the screw member 31 to fasten it to the square steel column 2.

[0052] As shown in Figures 5 and 6, the base 24 serves as a base for distributing the load acting on the square steel columns 2 arranged at the four corners of the assembly shelf 3 and placing it on the floor, and also serves as a guide for making it easier to stack multiple assembly shelves 3 according to the present invention by abutting the folded end faces 23 against them.

[0053] Although not shown in the drawings, it is preferable to provide a means for moving by wheels in which the bottom of the wheels is positioned lower than the bottom of the base 24. When such wheels are used, they can be removed when no longer needed by adopting a configuration in which they are fastened to the shelf 3 with a screw member, and by removing the wheels that get in the way when stacked, it becomes possible to secure more storage space.

[0054] Figure 6 is an explanatory diagram of an embodiment of a configuration in which a bottom plate is attached to a knockdown shelf according to the present invention and further equipped with partition members, and this embodiment is configured such that a bottom plate with four sides folded onto the lowest cross member is provided with partition members 50 on top of which panel-shaped materials or ingredients can be leaned against and stored. Also, the configuration shown in Figure 6 does not include cross members 40 to leave one side open, but instead includes additional cross members 40 on the other side to ensure the required rigidity.

[0055] The bottom plate 60 is a plate-like member that covers the bottom portion that forms the lowest layer of the shelf 3. When the partition member 50 is provided, the bottom plate 60 is provided with an insertion groove 61 and a female screw portion 30 for fixing the fixing plate 70.

[0056] Figure 7 is an explanatory diagram illustrating the configuration of a partition member according to the present invention, in which Figure 7(a) shows an enlarged cross section of a portion illustrating an embodiment in which a seam fold is applied to the curved portion 80, Figure 7(b) shows a state in which a joining structure 4 and a fixing plate 70 for fixing the partition member are used, and Figure 7(c) is an explanatory diagram illustrating an embodiment in which a partition member is used. Note that the seam fold in the curved portion 80 shown in Figure 7(a) is not an essential requirement, but it is preferable to apply it.

[0057] The connecting structure 4 is a connecting means for fixing the partition member 50 to the bottom plate 60, in which the insertion piece 51 is inserted into the insertion groove 61, slid along the slide groove provided in the insertion piece 51, and the fixing plate 70 is fastened with a screw member to fix the position so that it does not move, thereby positioning and fixing it.

[0058] The partition member 50 is a member for providing a partition on the bottom plate 60, and has an insertion piece 51 provided at the bottom of the partition member 50, which is further provided with a slide groove, and is positioned by sliding the insertion piece 51 after being inserted into the insertion groove 61. Thereafter, the positioned state is maintained and fixed by a fixing plate 70. The partition member 50 is provided on a pallet or the like that stores panel-shaped materials or products by leaning them against each other.

[0059] The fitting piece 51 is an insertion piece for positioning and fixing the partition member 50 on the bottom plate 60, and is provided at the end of the partition member 50.

[0060] The upper corner 52 is a corner that connects the upper edge of the partition member 50 to the left and right vertical members, and is usually made by using a bending machine such as a pipe bender to make a pipe material such as a round pipe, or by connecting it with a standard shaped material such as a corner joint.

[0061] The fitting groove 61 is a groove into which the fitting piece 51 is fitted, and into which the partition member 50 is positioned via the slide groove of the fitting piece 51 .

[0062] The fixing plate 70 is in the form of a plate or an angle, so that the fitting piece 51 is fitted into the fitting groove 61 and slid to maintain its position, and the fixing plate 70 is provided with a bolt hole for inserting a screw member.

[0063] The curved portion 80 is a so-called cut that allows for easy formation of bent portions without using a hydraulic bender equipped with a dedicated jig or mold when bending channel shapes, square steel material, etc. Note that, in order to eliminate edges that people may touch, it is also preferable to perform hemming (also known as hemming, crease bending, or crushing) in which the end of the cut plate is bent 180 degrees and crushed flat, as shown in Figure 7(a).

[0064] The planar shape of the multiple slits 81 has multiple notches in the curved forming section 80 that allow for easy formation of bent sections when bending channel shapes, square steel material, etc., without the need for hydraulic benders equipped with special jigs or molds, and also creates a beautiful design structure.

[0065] The planar shape of the V-shape 82, like the multiple slits 81, has multiple V-shaped notches so that when bending channel shapes or square steel material, etc., bending can be easily performed without using a hydraulic bender equipped with special jigs or molds, and also creates a structural aesthetic.

[0066] The planar shape of the trapezoid 83, like the multiple slit shapes 81 and V-shape 82, has multiple notches in the trapezoid so that when bending channel shapes or square steel material, etc., bending can be easily performed without using a hydraulic bender with dedicated jigs or molds, and also creates a structural aesthetic design. [Industrial Applicability]

[0067] The assembled shelf of the present invention can be made from flat plates and does not require welding, so it can be manufactured without requiring a lot of equipment and can be used in many logistics warehouses and production factories, and is therefore considered to have high industrial applicability. [Explanation of symbols]

[0068] 1. Pillar manufacturing method 2 Square steel column 3 shelves 4 Bonded structure 5. Shelf manufacturing method 10 Board material 20 pillars 21 Column members 22 Joint 23 Folded end face 24 Pedestal 30 Female thread 31 Threaded member 40 Cross member 41 Joint 42 Bonding Plate 50 Partition material 51 Inset piece 52 Upper corner 60 Bottom plate 61 Inset groove 70 Fixing plate 80 Curved forming part 81 Multiple slits 82 V-shaped 83 Trapezoid Cutting process A Screw hole processing process B Bending process C Assembly process D Cutting process E Screw hole processing process F Bending process G Shelf assembly process H

Claims

1. A manufacturing method for manufacturing columns (20) of an assembly shelf manufactured by bending a plate material (10), comprising the steps of: a cutting step A for cutting a pair of pillar members (21) into a predetermined shape from a plate material (10); A threaded hole processing step B in which a female screw portion (30) is formed by drilling a pilot hole and threading; a bending step C of bending the sheet in the longitudinal direction so that the cross section is substantially L-shaped; an assembly process D in which the column members (21) are fixed to the respective connecting portions (22) provided at the ends thereof with threaded members (31); A method for manufacturing a pillar (1), characterized in that it comprises:

2. A method for manufacturing an assembled shelf consisting of a square steel column (2) and a cross member (40), the manufacturing process of the square steel column (2) comprising: a cutting step A for cutting a pair of pillar members (21) into a predetermined shape from a plate material (10); A threaded hole processing step B in which a female screw portion (30) is formed by drilling a pilot hole and threading; a bending step C of bending the sheet in the longitudinal direction so that the cross section is substantially L-shaped; an assembly step D of fixing the column members (21) to the respective coupling portions (22) provided at the ends of the column members (21) with threaded members (31); The manufacturing process of the cross member (40) a cutting step E of cutting the plate material (10) into a predetermined shape; a threaded hole processing step F for forming a bolt hole in the cross member (40); a bending step G of bending the sheet in the longitudinal direction so that the cross section is substantially L-shaped; The shelf manufacturing method (5) is characterized by including a shelf assembling process H in which the square steel column (2) and the cross member (40) are fastened together with the screw member (31) to assemble the shelf.

3. A pair of pillar members (21) bent in the longitudinal direction so that the cross section is approximately L-shaped are combined, A square steel column (2) characterized in that it is fixed to a connecting portion (22) provided at the end using a screw member (31).

4. A shelf (3) consisting of a square steel column (2) and a cross member (40), The cross member (40) is connected to the square steel column (2) by a screw member (31) via a connecting portion (41) or a connecting plate (42) provided at the end, The square steel column (2) is an assembly shelf (3) in which a pair of column members (21) bent longitudinally so that the cross section is approximately L-shaped are combined and fixed to connecting parts (22) provided at the ends using screw members (31).

5. A partition member (50) provided on an assembled shelf (3) consisting of a square steel column (2) and a cross member (40), the cross member (40) being connected to the square steel column (2) by a screw member (31) via a connecting portion (41) or connecting plate (42) provided at the end, A curved portion (80) is provided at an upper corner (52) of the partition member (50), and the curved portion (80) is a groove having a planar shape of a plurality of slits (81), a V-shape (82), or a trapezoid (83); The partition member (50) has a coupling structure in which an insert piece (51) is provided at the end of the partition member (50), and an insert groove (61) into which the insert piece (51) is inserted is provided in the bottom plate (60); The partition member (50) is configured to fix the fixing plate (70) by the screw member (31) in a state in which the fitting piece (51) is fitted into the fitting groove (61).

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