Metal sheet lattice structure and metal sheet lattice assembly using the same

Abstract

Conventionally, lattice structures have a structure in which cylindrical rod-shaped bodies are simply held between two opposing points, resulting in a structure that is weak against deformation due to twisting, where the metal plate rotates around the rod-shaped body as a whole. [Solution] The metal sheet lattice structure consists of a plurality of first lattice members 10 formed by cutting out strip-shaped metal sheets into a predetermined shape and then bending the strip-shaped metal sheets in the longitudinal direction, and a plurality of second lattice members 30 formed by cutting out strip-shaped metal sheets into a predetermined shape and then bending the strip-shaped metal sheets in the longitudinal direction. Each of the first lattice members 10 and the plurality of second lattice members 30 are arranged in a shape where they face each other and sandwich each other at approximately right angles, and where they overlap and make surface contact, so that the plurality of first lattice members 10 and the plurality of second lattice members 30 are combined at approximately right angles to each other.

Description

Technical Field

[0001] The present invention relates to a lattice structure of a thin metal plate (hereinafter abbreviated as "thin metal plate") subjected to punching and bending, and a lattice assembly of a thin metal plate using the same.

Background Art

[0002] Conventionally, gratings are known as metal products having load-bearing capacity, durability, and drainage properties. Gratings are mainly made of metals such as iron in a lattice shape and have been used as manhole covers for roads and sidewalks, and floor plates for factories and plants. Conventional gratings have been manufactured to have a lattice shape by welding a metal thick plate of 3 mm or more.

[0003] Further, the invention of Patent Document 1 discloses an invention of creating a lattice structure by sandwiching a rod-shaped body in a deformed through hole by utilizing the deformation of a through hole provided at a bent portion of a metal plate.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Conventional gratings are mainly assembled by welding, so there is a problem that it is difficult to manufacture them with thin plates in order to prevent deformation due to heat. In addition, when welding stainless steel plates, there is a problem that care must be taken so that the material does not change due to heat.

[0006] Furthermore, welding itself involves applying heat to the area being welded or its vicinity. When metal is heated, it tends to expand, making it difficult to produce multiple highly accurate and homogeneous lattice assemblies. Moreover, in welding, if only the joining area is heated locally, its expansion is hindered by the surrounding material, resulting in "thermal stress" within the metal.

[0007] Conventional gratings, after being assembled by welding steel materials, require corrosion protection treatments such as galvanizing or anti-corrosion coating, as they are expected to provide drainage.

[0008] Furthermore, because it was assembled by welding together thick steel plates, there was a problem in that the load per unit area was heavy.

[0009] Regarding the invention of Patent Document 1, the structure involves a through-hole provided at a bent portion of a metal plate that deforms, and a rod-shaped body being clamped in the deformed through-hole, which means that it does not bite into the surface of the metal, etc. Aside from deformation, the clamping mechanism involves either line contact at two points (top and bottom) or a form of clamping that is close to point contact at two points (top and bottom). When the invention of Patent Document 1 is used horizontally, such as in drain covers or floorboards, there is a problem that there is a limit to the load that can maintain the shape of the lattice structure when a load is applied to the upper surface.

[0010] In particular, the lattice structure of the invention described in Patent Document 1 is a structure in which cylindrical rod-shaped bodies are simply held in place at two opposing points. Therefore, the movement of the metal plates in the direction of rotation around the rod-shaped bodies is basically achieved by the combination of multiple rod-shaped bodies and multiple metal plates. Nevertheless, the lattice structure as a whole has the problem of being weak against deformation due to twisting, where the metal plates rotate as a whole around the rod-shaped bodies.

[0011] Furthermore, in the invention of Patent Document 1, if the structure is based on the premise that when a through-hole provided in the bent portion of a metal plate deforms and a rod-shaped body is clamped in the deformed through-hole, the deformation occurs at the point of line contact or point contact of the metal plate or rod-shaped body, resulting in surface contact, then the metal plate and / or rod-shaped body must be made of a ductile metal, and the metal plate and / or rod-shaped body itself will be easily bent. Naturally, the lattice structure invention of Patent Document 1 will have the problem of easily deforming. Moreover, if the through-hole in the metal plate deforms, the clamping force will be lost in the first place, so the lattice structure will easily deform. [Means for solving the problem]

[0012] To solve the above problems, the present invention employs the following technical measures.

[0013] The metal sheet lattice structure of the first invention comprises a plurality of first lattice members formed by cutting a strip-shaped metal sheet into a predetermined shape and then bending the strip-shaped metal sheet in the longitudinal direction, and a plurality of second lattice members formed by cutting a strip-shaped metal sheet into a predetermined shape and then bending the strip-shaped metal sheet in the longitudinal direction. The plurality of first lattice members and the plurality of second lattice members are subjected to the punching process, which causes each of them to face each other and sandwich each other in a substantially orthogonal shape, and the bending process, which causes each of the plurality of first lattice members and the plurality of second lattice members to overlap and make surface contact, thereby forming the plurality of first lattice members and the plurality of second lattice members assembled together in a substantially orthogonal shape to each other. The metal sheet lattice structure of the second invention, as described in claim 1, has joint holes provided in the plurality of first lattice members and the plurality of second lattice members by the punching process, which allow them to be joined to each other by various joining methods. The metal sheet lattice structure of the third invention, in the invention described in claim 2, has holes for weight reduction provided in each of the plurality of first lattice members and the plurality of second lattice members by the punching process. The metal sheet lattice structure of the fourth invention, in the invention described in claim 2, has notches provided at the upper ends of the plurality of second lattice members by the punching process. The metal sheet lattice assembly of the fifth invention is characterized in that a frame member surrounding the lattice structure is attached in the invention described in any one of claims 2 to 4. [Effects of the Invention]

[0014] By having the technical means described above, the following effects are achieved.

[0015] The lattice structure of the first invention is formed from a single rectangular thin metal sheet by punching and bending, and it is possible to create a lattice space that is resistant to deformation. The lattice structure of the second invention utilizes the first invention and can be joined without welding, eliminating the need to consider deformation due to welding. Furthermore, if corrosion-resistant metals are used for the thin metal sheets, plating and painting can be eliminated. The third invention allows for weight reduction of the lattice structure by utilizing the second invention. In the fourth invention, by utilizing the second invention, the lattice structure can be assembled into a lattice product, and when used with a grating, an anti-slip feature can be easily formed, and lattice products with varying degrees of anti-slip effect can be manufactured. The fifth invention, a lattice assembly, can have the effects of any one of the second to fourth inventions by utilizing any one of the second to fourth inventions. [Brief explanation of the drawing]

[0016] [Figure 1] This is an external view of a lattice assembly according to the first embodiment of the present invention. [Figure 2] This is an exploded view of a lattice structure constituting a lattice assembly according to the first embodiment of the present invention. [Figure 3] This is an assembly drawing of a lattice structure constituting a lattice assembly according to the first embodiment of the present invention. [Figure 4] This is an exploded view of the lattice structure at the corner of a lattice assembly according to the first embodiment of the present invention. [Figure 5] It is an assembly view of the lattice structure at the corner of the lattice assembly of the first embodiment according to the present invention. [Figure 6] It is an exploded view of the lattice structure constituting the lattice assembly of the second embodiment according to the present invention. [Figure 7] It is an exploded view of the lattice structure at the corner of the lattice assembly of the third embodiment according to the present invention. [Figure 8] It is an assembly view of the lattice structure at the corner of the lattice assembly of the third embodiment according to the present invention.

Embodiments for Carrying Out the Invention

[0017] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0018] (First Embodiment) The lattice assembly 1 of the first embodiment will be described with reference to FIG. 1. The lattice assembly 1 is formed by combining a lattice structure 5 in which 24 sets of first lattice members 10 and second lattice members 30 are crossed at a predetermined interval and assembled into a substantially square shape, and two sets of first frame members 60 and second frame members 70 corresponding to each of the two opposing sides of the substantially square lattice structure 5. Regarding the first lattice member 10, since the lattice assembly 1 is made line-symmetric with respect to the line that divides the lattice assembly 1 into two at the center of the second frame member 70, it is assembled so that there are 12 sets of first lattice members 10 facing in the opposite direction to the 12 sets of first lattice members 10. The reason for making the above line-symmetric is to prevent the orientation from occurring on the upper surface of the lattice assembly 1 and since there is no change in strength, the orientation of the first lattice member 10 may be all the same.

[0019] The lattice assembly 1 is an example when it is manufactured to be 1 m × 1 m in length and width and 40 mm in thickness (height), but it can be manufactured in a free size as long as the size of the material and the size that the processing machine can handle are compatible.

[0020] ) The first lattice member 10, the second lattice member 30, the first frame member 60, and the second frame member 70 are formed into predetermined shapes from thin metal sheets by punching and bending processes described later. Here, the thin metal sheet is appropriately selected from stainless steel sheets, surface-treated steel sheets such as hot-dip galvanized steel sheets, painted color steel sheets, aluminum sheets, titanium sheets, etc., depending on the place and application of use. Furthermore, since it is a thin metal sheet, a sheet thickness of less than 3 mm is used, and the sheet thickness is selected according to the size of the lattice assembly 1 and the required load-bearing capacity (strength).

[0021] The structure of the lattice structure 5 will be explained using Figures 2 and 3. Since the entire lattice assembly 1 consists of numerous components and repeating shapes, as shown in Figure 1, it will be explained using a diagram of a portion of the lattice assembly 1 (the circled portion 1a in Figure 1). Because the lattice assembly 1 has a symmetrical structure, with two sets of first frame members 60 and second frame members 70 of the lattice structure 5, and adjacent lattice spaces, 484 locations other than the lattice space running crosswise through the center of the lattice structure 5 are formed to have the same lattice space structure. Therefore, to explain the minimum necessary basic configuration of the lattice structure 5, Figures 2 and 3 show diagrams of four lattice spaces out of the 484 lattice spaces in the circled portion 1a of the lattice assembly 1 in Figure 1.

[0022] Figure 2 shows two sets of short pieces of first lattice members 10 and second lattice members 30 separated to illustrate an example of creating four lattice spaces out of 484 lattice structures 5. In Figure 2, the first lattice members 10 and second lattice members 30 are made using, for example, a standard-sized sheet of stainless steel, which is 1.5 mm thick, 1219 mm wide, and 2438 mm long, and punched to the size described later. Examples of punching include creating a dedicated die and performing press work, or shearing with a general-purpose turret punch press, laser, or wire cutter to create an outer shape with a predetermined punched shape.

[0023] Furthermore, this punched-out stainless steel sheet metal is bent to create the final shapes of the first lattice member 10 and the second lattice member 30. Examples of bending methods include creating a dedicated die and attaching it to a press machine, or using a general-purpose press brake. When using a dedicated die, punching and bending may be performed simultaneously, but usually, punching is performed first, followed by bending to create the desired shape. In addition, for bending, the end plates are bent first, and then, with the end plates bent, the inner plates are bent to create the desired shape.

[0024] As mentioned above, bending is performed after punching, and the shape after processing will be explained using Figure 2. The joints between the frame members 70 at both ends in the longitudinal direction of the first lattice member 10 will be described later. The first lattice member 10 has a long, rectangular overhang 12 formed by a first bend 21 of the first lattice member that is approximately right-angled on the upper side of the first inner plate 11, and a long, rectangular upper plate 13 formed by a second bend 22 of the first lattice member that is also approximately right-angled. The first lattice member 10 is formed in a cross-sectional shape of "approximately angular inverted J" by the first bend 21 and the second bend 22 of the first lattice member. In addition, the first inner plate 11 has rectangular cutouts 16 provided at equal intervals. The width of the cutouts 16 should be slightly wider than the thickness of the metal sheet used, preferably the same width as the thickness of the metal sheet used, and should extend in the height direction to approximately half the width of the first inner plate 11.

[0025] Furthermore, the first inner plate 11 has roughly square-shaped cutouts 17 with rounded corners, which are provided at equal intervals in the center of the wall separated by the first lattice member 10 and the second lattice member 30. The cutouts 17 are provided in locations that have little effect on the load-bearing capacity of the lattice assembly 1 (lattice structure 5), and are intended to reduce the weight of the lattice assembly 1 (lattice structure 5) and make it easier to handle, so they do not need to be provided if weight is not a concern. At the bottom of the first inner plate 11, roughly square-shaped interlocking pieces 14 are provided at equal intervals, protruding along one side of the notch 16, and are bent in the opposite direction to the first bend 21 and second bend 22 of the first lattice member by the roughly right-angled third bend 23 of the first lattice member. An interlocking hole 18 is made approximately in the center of the interlocking pieces 14 of the lattice member.

[0026] As mentioned above, bending is performed after punching, and the shape after processing will be explained in Figure 2. The joints between the frame members 60 at both ends in the longitudinal direction of the second lattice member 30 will be described later. In Figure 2, the second lattice member 30 has a long, rectangular lower plate 32 attached to the lower side of the second inner plate 31 by a second lattice member first bend 41 which is approximately right-angled. This second lattice member first bend 41 forms the cross-sectional shape of the second lattice member 30 to be "approximately L-shaped". Second inner plate 31 has rectangular cutouts 36 provided at equal intervals. The width of the cutouts 36 should be slightly wider than the thickness of the metal sheet being used, preferably the same width as the thickness of the metal sheet being used, and the cutout should extend in the height direction to approximately half the width of the second inner plate 31.

[0027] Furthermore, the second inner plate 31 has roughly square cutouts 37 with rounded corners, which are provided at equal intervals in the center of the wall separated by the first lattice member 10 and the second lattice member 30. The cutouts 37 are provided in locations that have little effect on the load-bearing capacity of the lattice assembly 1 (lattice structure 5), and are intended to reduce the weight of the lattice assembly 1 (lattice structure 5) and make it easier to handle, so they do not need to be provided if weight is not a concern. The upper part of the second inner plate 31 has a roughly trapezoidal cutout that runs along one side of the notch 36 to allow the hanging plate 12 of the first lattice member 10 to pass through, and an upper end cutout 39 with a roughly concave shape at its upper end. The lower plate 32 has equally spaced joining holes 38 that correspond to the joining holes 18 of the lattice member mutual joining pieces 14 of the first lattice member 10.

[0028] In Figure 2, when the notch 16 of the first inner plate 31 is inserted into the notch 36 of the second inner plate 31, a lattice structure 5 is formed with a single lattice space. This lattice structure 5 with a single lattice space is shown in Figure 3.

[0029] In Figure 3, when the four notches 16 of the first lattice member 10 and the four notches 36 of the second lattice member 30 are inserted so as to intersect with each other, a single lattice space is formed, surrounded on all four sides by two first inner plates 11 and two second inner plates 31. In addition, the two lattice member interconnecting pieces 14 of the two first lattice members 10 overlap the upper surfaces of the lower plates 32 of the two second lattice members 30. At this time, the connecting holes 38 of the lower plates 32 and the connecting holes 18 of the lattice member interconnecting pieces 14 overlap and communicate with each other.

[0030] Here, even if the lower ends of the four notches 16 of the first lattice member 10 and the upper ends of the four notches 36 of the second lattice member 30 do not come into contact, the relative positions of the first lattice member 10 and the second lattice member 30 are determined by the overlapping of the two interconnecting pieces 14 of the two first lattice members 10 on the upper surfaces of the lower plates 32 of the second lattice member 30, so they do not need to come into contact.

[0031] However, in order to ensure that the lower end of the notch 16 and the upper end of the notch 36 are in firm contact (closely attached), the lattice member interconnecting piece 14 is positioned so as to be slightly raised from the upper surface of the lower plate 32, for example, by 0.5 mm, in the aforementioned positional relationship, and is attached by a joining method that applies pressure to the lattice member interconnecting piece 14 from the upper surface of the lower plate 32. This joining method, which applies pressure, makes it possible to bring the four notches 16 of the first lattice member 10 and the four notches 36 of the second lattice member 30 into close contact. When they are in close contact, the play in the lattice assembly 1 (lattice structure 5) is reduced, and the rattling when a user stands on the lattice assembly 1 can be reduced.

[0032] The joining method for joining the lattice member interconnecting piece 14 to the upper surface of the lower plate 32 includes, for example, joining the joining hole 38 of the lower plate 32 and the joining hole 18 of the lattice member interconnecting piece 14 with rivets or blind rivets, or making the joining hole 18 of the lattice member interconnecting piece 14 slightly smaller than the joining hole 38 of the lower plate 32, performing burring in an inward direction if necessary, and joining with tapping screws from the lower plate 32 side. In any of these methods, pressure is applied to the upper surface of the lower plate 32 to join the lattice member interconnecting piece 14. Furthermore, since the joining point is on the outside of the lattice structure 5, the joining work can be easily performed.

[0033] Furthermore, if the joining holes 38 of the lower plate 32 and the joining holes 18 of the lattice member interconnecting piece 14 are not provided, and the lattice member interconnecting piece 14 is spot-welded to the upper surface of the lower plate 32, then because it is a partial welding method, there is little deformation of the material during welding, and the area where the material is altered is small, so there is no need for surface treatment such as painting.

[0034] If, depending on the usage environment, it is not necessary to increase the load-bearing capacity or strength required of the lattice structure 5, the joining holes 18 of the lattice member interconnecting pieces 14 and the joining holes 38 of the lower plate 32 may not be joined at all. For example, they may be joined in a staggered pattern (alternating diagonally) with one hole skipped between them, or with multiple holes skipped between them. In this case, the joining holes 38 of the lower plate 32 that are not joined may be given an upward-facing convex burring or drawing process so that they fit into the joining holes 18 of the lattice member interconnecting pieces 14.

[0035] When the first lattice member 10 is attached to the second lattice member 30 as described above, the relative positional relationship between the upper surface of the upper plate 13 of the first lattice member 10 and the upper end notch 39 of the second lattice member 30 can be adjusted by cutting out the second lattice member 30, using the position of the upper surface of the upper plate 13 of the first lattice member 10 as a reference. In this case, if the height of the end face of the upper end notch 39 of the second lattice member 30 is made higher than the upper surface of the upper plate 13 of the first lattice member 10, for example, by about 0.5 to 1 mm, it can be made less slippery on the upper surface of the lattice assembly 1. Alternatively, if the height of the end face of the upper end notch 39 of the second lattice member 30 is made lower than the upper surface of the upper plate 13 of the first lattice member 10, for example, by about 0.5 to 1 mm, it will be less slippery on the upper surface of the lattice assembly 1 with rubber soles, but it will be possible to slide boxes with hard bottom plates.

[0036] In the lattice structure 5, in which the first lattice member 10 is attached to the second lattice member 30, the load applied from the upper side of the lattice structure 5 is supported by the lower plate 32 that supports the second inner plate 31 formed by the first bend 41 of the second lattice member 30. Furthermore, in the first lattice member 10 as well, the load applied from the upper side of the lattice structure 5 is supported by the second lattice member 30 through the lattice member interconnecting piece 14 and the notch 16, with the lower plate 32 and notch 36 of the second lattice member 30 present.

[0037] The first lattice member 10 has an upper plate 13 formed by the first bend 21 and the second bend 22 of the first lattice member, which is structured to be resistant to deformation under loads applied from the upper side of the lattice structure 5. Furthermore, the second lattice member 30 is structured to support the loads applied from the upper side of the lattice structure 5 by the first lattice member 10, through the use of the aforementioned blind rivet or similar joining method in the joining holes 18 and 38 of the lattice member 10 and the lower plate 32 of the second lattice member 30.

[0038] In the roughly cubic space formed by the lattice structure 5, the lattice member interconnection piece 14 of the first lattice member 10 is joined to the lower plate 32 of the second lattice member 30. Furthermore, the lattice member interconnection piece 14 of the first lattice member 10 is close to the first bend 41 of the second lattice member that forms the lower plate 32, and the notch 16 of the first lattice member 10 is inserted into the notch 36 of the second lattice member 30 so as to intersect with each other. As a result, the formed roughly cubic space has a structure that is difficult to deform.

[0039] If you want to make the top surface of the lattice assembly 1 even less slippery, you can do so by giving the top plate 13 of the first lattice member 10 a predetermined width, and then adding anti-slip features such as multiple circular or square cutouts or burring that rises up on the top surface.

[0040] As mentioned above, the first lattice members 10 are assembled in such a way that they are symmetrical to the lattice assembly 1, which is divided into two parts at the center of the second frame member 70. Therefore, there are 12 sets of first lattice members 10 that are facing the opposite direction. For this reason, in the lattice space in the center of the lattice assembly 1, the hanging plates 12 and top plates 13 of the first lattice members 10 are oriented in opposite directions, and the shape of the cutouts in the second inner plate 31 in the center of the corresponding second lattice member 30, such as the notches 36 and upper cutouts 39, is altered.

[0041] Next, we will explain the case where the first frame member 60 and the second frame member 70, as described in Figure 1, are attached to the aforementioned lattice structure 5. As shown in the circled lattice assembly portion 1b in the lattice assembly 1 in Figure 1, the structure of the lattice space near the first frame member 60 and the second frame member 70 is different in order to correspond to the first frame member 60 and the second frame member 70. Regarding the lattice structure 6, which is a modified version of this lattice structure 5, we will explain schematic diagrams of the lattice structure 5 and the lattice structure 6 which is a continuous and integrated structure with it using Figures 4 and 5. Note that since Figures 4 and 5 show the lattice structure 6 attached to the first frame member 60 and the second frame member 70, we will also explain the structure of the lattice assembly 1, which is formed by attaching the first frame member 60 and the second frame member 70.

[0042] Similar to Figures 2 and 3, the entire lattice assembly 1 is described as having numerous components and repeating the same shape, as shown in Figure 1. Therefore, it is described as a cutaway view of a part of the lattice assembly 1 (the circled lattice assembly portion 1b in Figure 1). The circled lattice assembly portion 1b at the corner of the lattice assembly 1 in Figure 1 includes the lattice structure 6. Figures 4 and 5 show cutaway views of four lattice spaces near the point where the first frame member 60 and the second frame member 70 are joined, including this lattice structure 6.

[0043] In the lattice structure 6 shown in Figure 4, in order to join it with the second frame member 70 described later, a lattice frame joining piece 15 is bent at the end of the first inner plate 11 of the first lattice member 10 by a lattice frame joining bend 24 so as to be perpendicular to the upper plate 13 and in the opposite direction to the bending direction of the upper plate 13 relative to the first inner plate 11. In addition, two lattice frame joining holes 19 are provided in the lattice frame joining piece 15.

[0044] At the end of the first lattice member 10, the first inner plate 11 has notches at the top and bottom to accommodate the shape of the second frame member 70, which will be described later. Corresponding to the upper notch, the length of the top plate 13 and the length of the hanging plate 12 are also shortened. Furthermore, the end of the first inner plate 11 does not have a cutout hole 17. This is to ensure strength with respect to the lattice frame joining piece 15, but if there is no problem with strength, it may be provided, or a smaller cutout hole of a different shape may be provided.

[0045] Similarly, for the second lattice member 30 of the lattice structure 6, in order to join it with the first frame member 60 described later, a lattice frame joining piece 33 is bent at the end of the second inner plate 31 of the second lattice member 30 by a lattice frame joining bend 42 so that it is perpendicular to the lower plate 32 and bends in the same direction as the bending direction of the lower plate 32 relative to the second inner plate 31. In addition, two lattice frame joining holes 43 are provided in the lattice frame joining piece 33.

[0046] At the end of the second inner plate 11 of the second lattice member 30, notches are provided at the top and bottom to correspond to the shape of the first frame member 60, which will be described later, and the bottom plate 32 is shortened in correspondence with the lower notch. Furthermore, the end of the second inner plate 31 does not have a cutout hole 37. This is to ensure strength with respect to the lattice frame joining piece 33, but if it is not necessary to consider the strength of the lattice assembly 1, a cutout hole 37 may be provided, or a cutout hole of a different shape with a smaller size may be provided.

[0047] Regarding the first frame member 60 and the second frame member 70, if the diagram clearly shows their joint relationship, the shapes of the first frame member 60 and the second frame member 70 will be difficult to understand. Therefore, for reference, a diagram showing the first frame member 60i and the second frame member 70i, with each of them reversed and facing inward (inside), is shown at the bottom of Figure 4. The first frame member 60i and the second frame member 70i are manufactured using the same process as the first grid member 10 and the second grid member 30, by punching and bending 1.5 mm thick stainless steel sheets using the aforementioned processing machines. Roughly speaking, the stainless steel sheets are punched into roughly rectangular shapes, and then bent to create a roughly C-shaped cross-section.

[0048] In Figure 4, the first frame member 60(60i) has a long, rectangular frame hanging plate 62 attached to the upper side of the frame vertical plate 61 by a nearly right-angled first frame bend 66, and then a long, rectangular frame upper plate 63 attached by a nearly right-angled second frame bend 67. Furthermore, a long, rectangular frame rising plate 64 attached to the lower side of the frame vertical plate 61 by a nearly right-angled third frame bend 68, and then a long, rectangular frame lower plate 65 attached by a nearly right-angled fourth frame bend 69. The first frame member 60(60i) is formed with a nearly "C-shape" cross-section by the first frame bend 66, second frame bend 67, third frame bend 68 and fourth frame bend 69.

[0049] The first frame member 60 (60i) has two frame lattice joining holes 83 at equal intervals on each vertical frame plate 61, corresponding to the two lattice frame joining holes 43 of the lattice frame joining piece 33. In addition, the ends of the vertical frame plates 61 are provided with two frame mutual joining holes 85, corresponding to the frame mutual joining holes 84 of the frame mutual joining piece 81, which will be described later.

[0050] In Figure 4, the second frame member 70(70i) has a long, rectangular frame hanging plate 72 attached to the upper side of the frame vertical plate 71 by a nearly right-angled first frame bend 76, and then a long, rectangular frame upper plate 73 attached by a nearly right-angled second frame bend 77. Furthermore, a long, rectangular frame rising plate 74 attached to the lower side of the frame vertical plate 71 by a nearly right-angled third frame bend 78, and then a long, rectangular frame lower plate 75 attached by a nearly right-angled fourth frame bend 79. The second frame member 70(70i) is formed with a nearly "C-shape" cross-section by the first frame bend 76, second frame bend 77, third frame bend 78 and fourth frame bend 79.

[0051] Furthermore, at the vertical ends of the vertical frame plates 71, i.e., the corners of the lattice assembly 1, frame connecting pieces 81 are provided by bending the frame connecting pieces 82 in the same direction as the upper frame plate 73 and the lower frame plate 75, at approximately a right angle. Frame connecting holes 84 are also provided in the frame connecting pieces 81. These frame connecting pieces 81 are positioned on the inside of the first frame member 60 in the lattice assembly 1. This is to prevent unnecessary members from protruding from the outer shape, but they may be positioned on the outside if there is no need to consider this.

[0052] The first frame member 70 has two frame lattice joining holes 88 at equal intervals on each vertical frame plate 71, corresponding to the two lattice frame joining holes 19 of the lattice frame joining piece 15.

[0053] Regarding the "approximately C-shaped" cross-sectional shape of the first frame member 60 and the second frame member 70, there is a shape called a C-channel (lip channel steel) for steel materials with an "approximately C-shaped" cross-sectional shape. However, the "approximately C-shaped" cross-sectional shape in this embodiment differs from the shape of a C-channel, in that the lower frame plates 65 and 75 are wider than the upper frame plates 63 and 73. This is because, when supporting the lattice assembly 1 from below, it is easier to support if the lower side is wider.

[0054] Figure 5 shows the structure assembled as shown in Figure 4. In Figure 5, when the first frame member 60 and the second frame member 70 are attached to the lattice structure 6, the frame lattice joining hole 88 of the second frame member 70 and the lattice frame joining hole 19 of the lattice frame joining piece 15 will overlap, and the frame lattice joining hole 83 of the first frame member 60 and the lattice frame joining hole 43 of the lattice frame joining piece 33 will overlap. In addition, the two frame mutual joining holes 84 of the frame mutual joining piece 81 of the second frame member 70 and the frame mutual joining hole 85 of the first frame member 60 will also overlap.

[0055] The joining methods for the frame lattice joining holes 83 and lattice frame joining holes 43, frame lattice joining holes 88 and lattice frame joining holes 19, and frame mutual joining holes 84 and frame mutual joining holes 85 include, for example, joining the overlapping holes with rivets or blind rivets, or making the inner overlapping holes slightly smaller than the outer overlapping holes, performing burring inwards if necessary, and joining them from the outside with tapping screws. Furthermore, since the joining points are located on the outer surface of the lattice assembly 1, the joining work can be easily performed.

[0056] The lattice assembly 1 can be assembled by first assembling the lattice structure 5, which includes the lattice structure 6, then attaching the first frame members 60 to both sides, and finally attaching the second frame members 70. When assembled as the lattice assembly 1, the top plate 63 of the first frame member 60, the top plate 73 of the second frame member 70, and the top plate 13 of the first lattice member 10 are all on the same plane and are formed to form the top surface of the lattice assembly 1. In addition, the bottom plate 65 of the first frame member 60, the top plate 75 of the second frame member 70, and the bottom plate 32 of the second lattice member 30 are all on the same plane and are formed to form the bottom surface of the lattice assembly 1.

[0057] The lattice assembly 1 has a structure in which a first frame member 60 and a second frame member 70 are attached to the perimeter of numerous lattice structures 5 via lattice structures 6. Since the structure that supports the load applied from the upper side of the aforementioned lattice structures 5 is joined to the first frame member 60 and the second frame member 70, the lattice assembly 1 also has a structure that supports the load applied from the upper side of the lattice assembly 1.

[0058] Regarding the lattice assembly 1, the roughly cubic space formed by the aforementioned lattice structure 5 is structured to be difficult to deform. Since the first frame member 60 and the second frame member 70 are joined to the periphery of these multiple lattice structures 5 via the lattice structure 6, the lattice assembly 1 also has a structure that is difficult to deform.

[0059] (Second Embodiment) Another embodiment of the lattice assembly will be described. In the lattice assembly of the second embodiment, the second lattice member 30 is referred to as the second lattice member 30a, and the first lattice member 10 and other structures are the same as in the first embodiment. Therefore, the assembly of the lattice structure 7, consisting of the second lattice member 30a and the first lattice member 10, will be explained using Figure 6, which illustrates this. Note that the assembled state of the lattice structure 7 from the state in Figure 6 can be inferred from Figure 3 of the first embodiment. For this reason, the explanation of the assembled state of the lattice structure 7 will be omitted. Furthermore, the basic structure is the same as that of the lattice assembly 1 of the first embodiment, and the same structural parts are denoted by the same reference numerals as in the first embodiment and their explanation will be omitted.

[0060] Similar to the first embodiment, bending is performed after punching, but the explanation will be given using the second lattice member 30a in the processed shape shown in Figure 6. The joints with the frame members 60 at both ends in the longitudinal direction of the second lattice member 30a are the same as in the first embodiment. In Figure 6, the second lattice member 30a has a long, rectangular upright plate 34 provided on the lower side of the second inner plate 31 by a second lattice member upright bend 44 which is approximately right-angled, and then a long, rectangular lower plate 32 provided by a second lattice member first bend 41 which is approximately right-angled. The second lattice member 30a is formed by the second lattice member upright bend 44 and the second lattice member first bend 41 to form a cross-sectional shape that is "approximately angular J-shaped". The second inner plate 31 has rectangular cutouts 36 provided at equal intervals. The notch 36 should have a notch width that is slightly wider than the thickness of the metal sheet being used, preferably the same width as the thickness of the metal sheet being used, and should extend in the height direction to approximately half the width of the second inner plate 31.

[0061] Furthermore, as described in the first embodiment, the second inner plate 31 has roughly square cutouts 37 with rounded corners, which are provided at equal intervals in the center of the wall separated by the first lattice member 10 and the second lattice member 30a. The cutouts 37 are provided in locations that have little effect on the load-bearing capacity of the lattice assembly (lattice structure 7) and are intended to reduce the weight of the lattice assembly (lattice structure 7) and make it easier to handle, so they do not need to be provided if weight is not a concern. The second inner plate 31 has a roughly trapezoidal cutout at the top that runs along one side of the notch 36 to allow the hanging plate 12 of the first lattice member 10 to pass through, and an upper end cutout 39 with a roughly concave shape at the top end. The bottom plate 32 has equally spaced joining holes 38 corresponding to the joining holes 18 of the lattice member mutual joining pieces 14 of the first lattice member 10.

[0062] In Figure 6, when the notch 16 of the first inner plate 31 is inserted into the notch 36 of the second inner plate 31, a lattice structure (not shown in Figure 6, but hereafter referred to as lattice structure 7) is formed, with a single lattice space.

[0063] When the first lattice member 10 is attached to the second lattice member 30a, the relative positional relationship between the upper surface of the upper plate 13 of the first lattice member 10 and the upper end notch 39 of the second lattice member 30a can be adjusted by cutting out the second lattice member 30a, using the position of the upper surface of the upper plate 13 of the first lattice member 10 as a reference. In this case, if the height of the end face of the upper end notch 39 of the second lattice member 30a is made higher than the upper surface of the upper plate 13 of the first lattice member 10, for example, by about 0.5 to 1 mm, it can be made less slippery on the upper surface of the lattice assembly 1. Alternatively, if the height of the end face of the upper end notch 39 of the second lattice member 30 is made lower than the upper surface of the upper plate 13 of the first lattice member 10, for example, by about 0.5 to 1 mm, it can be made less slippery on the upper surface of the lattice assembly 1 with rubber soles, but easier to slide with hard-bottomed boxes, etc.

[0064] In the lattice structure 7, in which the first lattice member 10 is attached to the second lattice member 30a, the load applied from the upper side of the lattice structure 7 is supported by the lower plate 32 that supports the second inner plate 31 formed by the first bend 41 of the second lattice member 30a. Furthermore, the lower plate 32 is reinforced by the rising plate 34 formed by the rising bend 44 of the second lattice member. In addition, the first lattice member 10 is also supported by the load applied from the upper side of the lattice structure 7 by the second lattice member 30a, through the lattice member interconnecting piece 14 and the notch 16, where the lower plate 32 of the second lattice member 30 and the notch 36 are located.

[0065] The first lattice member 10 has an upper plate 13 formed by the first bend 21 and the second bend 22 of the first lattice member, which is structured to resist deformation under loads applied from the upper side of the lattice structure 7. Furthermore, the second lattice member 30a is structured to support the load applied from the upper side of the lattice structure 7 by the first lattice member 10, through the use of the aforementioned blind rivet or similar joining method in the joining holes 18 and 38 between the lattice member interconnecting piece 14 of the first lattice member 10 and the lower plate 32 of the second lattice member 30a. In addition, the lower plate 32 of the second lattice member 30a is reinforced by the rising plate 34, further increasing its load-bearing capacity.

[0066] In the substantially cubic space formed by the lattice structure, the presence of a rising plate 34 formed by the second lattice member rising bend 44 makes the second lattice member 30a itself difficult to deform. Furthermore, similar to the first embodiment, the lattice member interconnecting piece 14 of the first lattice member 10 is joined to the lower plate 32 of the second lattice member 30a. In addition, the lattice member interconnecting piece 14 of the first lattice member 10 is close to the second lattice member first bend 41 that forms the lower plate 32, and the notch portion 16 of the first lattice member 10 is inserted into the notch portion 36 of the second lattice member 30a so as to intersect with each other, resulting in a structure that makes the formed substantially cubic space difficult to deform.

[0067] Furthermore, the interlocking piece 14 of the first lattice member 10 overlaps the lower plate 32, which is in a concave state sandwiched between the second inner plate 31 and the rising plate 34 on the lower side of the second lattice member 30a. When a deformable force is applied to the lattice structure 7, the interlocking piece 14 is structured to withstand the external deformable force thanks to the second inner plate 31 and the rising plate 34. In addition, the lattice assembly using the second lattice member 30a can have its load-bearing strength from the upper side increased, making it difficult for the lattice assembly to deform.

[0068] (Third embodiment) The third embodiment of the lattice assembly is an example in which the first frame member 60 and the second frame member 70 of the first embodiment are replaced with the first frame member 60a and the second frame member 70a, and the lattice structure connected to the first frame member 60a and the second frame member 70a to correspond to the first frame member 60a and the second frame member 70a is changed from the lattice structure 6 of the first embodiment to the lattice structure 8. The lattice structure 5 is the same as that of the first embodiment, so the same reference numerals are used and its description is omitted. Note that the lattice structure 5 can also be replaced with the lattice structure 7 of the second embodiment.

[0069] When attaching the first frame member 60a and the second frame member 70a to the aforementioned lattice structure 5, the structure of the lattice space near the first frame member 60a and the second frame member 70a is different in order to correspond to the first frame member 60a and the second frame member 70a. A schematic diagram of the lattice structure 8, which is a modified version of this lattice structure 5, and the lattice structure 8 which is continuous and integrated with it, will be explained using Figure 7. Note that since Figure 7 shows the lattice structure 8 attached to the first frame member 60a and the second frame member 70a, the structure of the lattice assembly 2, which is formed by attaching the first frame member 60a and the second frame member 70a, will also be explained.

[0070] Similar to the first embodiment, the entire lattice assembly consists of numerous components, as shown in the lattice assembly 1 of Figure 1, and is a repeating of the same shape. Therefore, it is described as a portion of the lattice assembly 2b, which is a cutaway of the lattice assembly. The corner portion of the lattice assembly 2b includes a lattice structure 8. Figures 7 and 8 show cutaway diagrams of four lattice spaces near the point where the first frame member 60a and the second frame member 70a are joined, including this lattice structure 8.

[0071] Regarding the lattice structure 8 in Figure 7, in order to join it with the second frame member 70a described later, the lattice frame joining piece 51 is bent at the end of the first inner plate 11 of the first lattice member 10 in the same direction as the lattice member mutual joining piece 14a by a lattice frame joining bend 52, and then the lattice frame joining piece 15a is bent by a lattice frame joining bend 24 so that it is perpendicular to the upper plate 13 and bends in the opposite direction to the bending direction of the upper plate 13 relative to the first inner plate 11. In addition, the lattice frame joining piece 15a is provided with two lattice frame joining holes 19a.

[0072] The vertical length from the upper plate 13 at the end of the first lattice member 10 to the lattice frame joining piece 51 is approximately equal to the inner dimensions of the frame upper plate 73 and frame lower plate 75 of the second frame member 70a (70ai), which has a roughly U-shaped cross-section, as described later. In addition, since the upper end of the lattice frame joining piece 15a needs to be bent by the lattice frame joining bend 24, it is punched out so that it is shorter than the upper plate 13 by the thickness of the metal sheet used. As a result, the vertical length of the lattice frame joining piece 15a can be made slightly shorter than the inner dimensions of the frame upper plate 73 and frame lower plate 75 of the second frame member 70a, so the spacing between the two lattice frame joining holes 19a provided in the lattice frame joining piece 15a is also arranged to be as close as possible to the frame upper plate 73 and frame lower plate 75 of the second frame member 70a, provided that there are no problems with the joining method.

[0073] Furthermore, the lattice member interconnecting piece 14a extends laterally from the notched portion 16 to the end of the first inner plate 11 and the top plate 13 of the first lattice member 10, and is formed to overlap the upper side of the lattice frame connecting piece 51. At the point where the lattice frame connecting piece 51 and the lattice member interconnecting piece 14a overlap, a lattice frame connecting hole 53 is provided in the lattice member interconnecting piece 14a, and a lattice frame connecting hole 54 is provided in the lattice frame connecting piece 51, respectively.

[0074] The connecting lattice frame joining holes 53 and 54 are formed to communicate with the frame lattice joining holes 89 provided in the lower frame plate 75 of the second frame member 70a, which will be described later. Furthermore, since the lattice member mutual joining piece 14a overlaps the upper side of the lattice frame joining piece 51 and the lower plate 32a of the second lattice member 30, which will be described later, the lattice frame joining piece 51 and the lower plate 32a are designed to form the same surface.

[0075] The first inner plate 11 that forms the lattice structure 6 at the end of the first lattice member 10 does not have a hole 17. This is to ensure strength with the lattice frame joining piece 15a, but if there is no problem with strength, it may be provided, or a smaller, differently shaped hole may be provided.

[0076] Similarly, for the second lattice member 30 of the lattice structure 8, in order to join it with the first frame member 60a described later, a lattice frame joining piece 33a is bent at the end of the second inner plate 31 of the second lattice member 30 by a lattice frame joining bend 42 so that it is perpendicular to the lower plate 32a and bends in the same direction as the bending direction of the lower plate 32a relative to the second inner plate 31. In addition, two lattice frame joining holes 43a are provided in the lattice frame joining piece 33a.

[0077] The vertical length from the upper end of the lattice frame joining piece 33a at the end of the second lattice member 30 to the lower plate 32a is approximately equal to the inner dimensions of the frame upper plate 63 and frame lower plate 65 of the first frame member 60a, which have a roughly U-shaped cross-section, as described later. Therefore, the vertical length of the lattice frame joining piece 33a can be slightly shorter than the inner dimensions of the frame upper plate 63 and frame lower plate 65 of the first frame member 60a, which have a roughly U-shaped cross-section. As long as there are no problems with the joining method, the spacing between the two lattice frame joining holes 43a provided in the lattice frame joining piece 33a is arranged to be as close as possible to the frame upper plate 63 and frame lower plate 65 of the first frame member 60a. In addition, a lattice frame joining hole 49 is provided in the lower plate 32a near the lattice frame joining piece 33a. The lattice frame joining hole 49 is formed to communicate with the frame lattice joining hole 86 provided in the frame lower plate 65 of the first frame member 60a, as described later.

[0078] The second inner plate 11 that forms the lattice structure 6 at the end of the second lattice member 30 does not have a cutout hole 37. This is to ensure strength with the lattice frame joining piece 33a, but if there is no problem with strength, it may be provided, or a cutout hole of a different shape but smaller in size may be provided.

[0079] Regarding the first frame member 60a (60ai) and the second frame member 70a (70ai), if the diagram clearly shows their joint relationship, the shapes of the first frame member 60a and the second frame member 70a are difficult to discern. Therefore, for reference, a diagram showing the first frame member 60ai and the second frame member 70ai, with each of them reversed and facing inward (inside), is shown at the bottom of Figure 7. The first frame member 60ai and the second frame member 70ai are manufactured from standard-length stainless steel sheets with a thickness of 1.5 mm, similar to the first lattice member 10 and the second lattice member 30, using the aforementioned processing machines for punching and bending. Roughly speaking, the stainless steel sheets are punched to form roughly rectangular strips, and then bent to create a roughly U-shaped cross-section.

[0080] In Figure 7, the first frame member 60a (60ai) has a long, rectangular upper frame plate 63 attached to the upper side of the vertical frame plate 61 by a second frame bend 67 that is approximately right-angled. Furthermore, a long, rectangular lower frame plate 65 is attached to the lower side of the vertical frame plate 61 by a fourth frame bend 69 that is approximately right-angled. Due to this second frame bend 67 and fourth frame bend 69, the first frame member 60 is formed with a cross-sectional shape that is "approximately U-shaped".

[0081] The first frame member 60a (60ai) has two frame lattice joining holes 83a on each vertical frame plate 61, spaced at equal intervals, corresponding to the two lattice frame joining holes 43a of the lattice frame joining piece 33a. In addition, the ends of the vertical frame plates 61 are provided with two frame mutual joining holes 85, corresponding to the frame mutual joining holes 84 of the frame mutual joining piece 81, which will be described later.

[0082] In Figure 7, the second frame member 70a (70ai) has a long, rectangular upper frame plate 73 attached to the upper side of the vertical frame plate 71 by a second frame bend 77 that is approximately right-angled. Furthermore, a long, rectangular lower frame plate 75 is attached to the lower side of the vertical frame plate 71 by a fourth frame bend 79 that is approximately right-angled. The second frame bend 77 and the fourth frame bend 79 form the cross-sectional shape of the first frame member 60a (60ai). In addition, at the vertical ends of the vertical frame plate 71, in other words, at the corners of the lattice assembly 1, frame interconnecting pieces 81 are provided by a frame interconnecting piece bend 82 that is approximately right-angled in the same direction as the upper frame plate 73 and the lower frame plate 75. Frame interconnecting holes 84 are also provided in the frame interconnecting pieces 81. These frame interconnecting pieces 81 are positioned on the inside of the first frame member 60 in the lattice assembly 1. This is to prevent unnecessary members from protruding from the outer shape, but they may be positioned on the outside if there is no need to consider this.

[0083] The first frame member 70a has two frame lattice joining holes 88a on each vertical frame plate 71, spaced at equal intervals, corresponding to the two lattice frame joining holes 19a of the lattice frame joining piece 15a.

[0084] Regarding the "approximately U-shaped" cross-sectional shape of the first frame member 60a and the second frame member 70a, there is a shape called channel steel for steel materials with an "approximately U-shaped" cross-sectional shape. However, the "approximately U-shaped" cross-sectional shape of this embodiment differs from that of channel steel, in that the lower frame plates 65 and 75 are wider than the upper frame plates 63 and 73. This is because when supporting the lattice assembly 1 from below, it is easier to support if the lower side is wider.

[0085] Figure 8 shows the structure of Figure 7 assembled. In Figure 8, when the first frame member 60a and the second frame member 70a are attached to the lattice structure 8, the frame lattice joint hole 88a of the second frame member 70a and the lattice frame joint hole 19a of the lattice frame joint piece 15a will overlap. Furthermore, the frame lattice joint hole 89 of the second frame member 70a and the lattice frame joint hole 54 of the lattice frame joint piece 51, which is superimposed on the lattice frame joint hole 53 of the lattice member mutual joint piece 14a, will overlap. The frame lattice joint hole 83a of the first frame member 60a and the lattice frame joint hole 43a of the lattice frame joint piece 33a will overlap. Furthermore, the frame lattice joint hole 86 of the first frame member 60a and the lattice frame joint hole 49 of the lower plate 32a will overlap. In addition, the two frame mutual joint holes 84 of the frame mutual joint piece 81 of the second frame member 70a and the frame mutual joint hole 85 of the first frame member 60a will also overlap.

[0086] The joining methods for the frame lattice joining hole 83a and lattice frame joining hole 43a, frame lattice joining hole 88a and lattice frame joining hole 19a, frame lattice joining hole 86 and lattice frame joining hole 49, frame lattice joining hole 89 and lattice frame joining hole 53 (54), and frame mutual joining hole 84 and frame mutual joining hole 85 include, for example, joining the overlapping holes with rivets or blind rivets, or making the inner overlapping hole slightly smaller than the outer overlapping hole, performing burring inwards if necessary, and joining from the outside with tapping screws. Furthermore, since the joining points are on the outside of the lattice assembly 2, the joining work can be easily performed.

[0087] The assembly method for the lattice assembly 2 involves first assembling the lattice structure 5, which includes the lattice structure 8, then attaching the first frame members 60a to both sides, and finally attaching the second frame members 70a. When assembled as the lattice assembly 2, the upper frame plate 63 of the first frame member 60a and the upper frame plate 73 of the second frame member 70a are thicker on the upper side than the upper plate 13 of the first lattice member 10 by the thickness of the metal sheet used, and are formed to form the upper surface of the lattice assembly 2. Furthermore, the lower frame plate 65 of the first frame member 60a and the upper frame plate 75 of the second frame member 70a are thicker on the lower side than the lower plates 32 and 32a of the second lattice member 30 by the thickness of the metal sheet used, and are formed to form the lower surface of the lattice assembly 2.

[0088] The lattice assembly 2 has a structure in which a first frame member 60a and a second frame member 70a are attached to the perimeter of numerous lattice structures 5 via lattice structures 8. Since the structure that supports the load applied from the upper side of the aforementioned lattice structures 5 is joined to the first frame member 60a and the second frame member 70a, the lattice assembly 2 also has a structure that supports the load applied from the upper side of the lattice assembly 2.

[0089] Regarding the lattice assembly 2, the roughly cubic space formed by the aforementioned lattice structure 5 is structured to be resistant to deformation. Since the first frame member 60a and the second frame member 70a are joined to these multiple lattice structures 5 via the surrounding lattice structure 8, the lattice assembly 2 also has a structure that is resistant to deformation.

[0090] Since joining is possible between the two widely spaced frame lattice joining holes 83a in the vertical frame plate 61 of the first frame member 60a and the two widely spaced frame lattice joining holes 88a in the vertical frame plate 71 of the second frame member 70a, this structure supports the load applied from the upper side of the lattice assembly 2, compared to the first embodiment. In this case, the lattice frame joining piece 33a, which is approximately equal to the inner height of the vertical frame plate 61 of the first frame member 60a, will be in close contact with the inner side of the vertical frame plate 61 of the first frame member 60a, and the lattice frame joining piece 15a, which is approximately equal to the inner height of the vertical frame plate 71 of the second frame member 70a, will be in close contact with the inner side of the vertical frame plate 71 of the second frame member 70a. Therefore, in this structure as well, this structure supports the load applied from the upper side of the lattice assembly 2.

[0091] Furthermore, the lattice member interconnecting piece 14a and the lattice frame connecting piece 51 that support the lower side of the first lattice member 10 are joined to the lower frame plate 75 of the second frame member 70a, and the lower plate 32a that supports the lower side of the second lattice member 30 is joined to the lower frame plate 65 of the first frame member 60a, thus creating a structure that supports the load applied from the upper side of the lattice assembly 2.

[0092] Although the present invention has been described above based on the first to third embodiments, the present invention is not limited in any way to the configurations of these embodiments. For example, the combinations of the first to third embodiments can be changed as appropriate.

[0093] Furthermore, this invention is not limited to these claims, but includes the inventions described in the claims and their equivalents. The invention described in the claims of this application is listed below. (Note) [1] Note 1 is a plurality of first grid members formed by cutting out a strip-shaped metal sheet into a predetermined shape and then bending the strip-shaped metal sheet in the longitudinal direction, It consists of multiple second grid members formed by cutting out strip-shaped metal sheets into a predetermined shape and then bending the strip-shaped metal sheets in the longitudinal direction. The punching process results in the plurality of first lattice members and the plurality of second lattice members facing each other and sandwiching each other at approximately right angles, The plurality of first lattice members and the plurality of second lattice members are each subjected to the bending process that forms overlapping surface contact, thereby forming a metal sheet lattice structure in which the plurality of first lattice members and the plurality of second lattice members are combined in a substantially orthogonal shape to each other. [2] Appendix 2 is a metal sheet lattice structure according to claim 1, wherein the plurality of first lattice members and the plurality of second lattice members are provided with joining holes by the punching process, which allow them to be joined to each other in various joining methods. [3] Appendix 3 is a metal sheet lattice structure according to claim 2, wherein each of the plurality of first lattice members and the plurality of second lattice members is provided with holes for weight reduction by the punching process. [4] Appendix 4 is a metal sheet lattice structure according to claim 2, wherein notches are provided at the upper ends of the plurality of second lattice members by the punching process. [5] Appendix 5 is a metal sheet lattice assembly according to any one of claims 2 to 4, wherein a frame member surrounding the lattice structure is attached. [Industrial applicability]

[0094] The lattice structure and lattice assemblies using the present invention can be used as replacements for conventional gratings, and therefore have industrial applicability. [Explanation of Symbols]

[0095] 1: Grid assembly 1a, 1b, 2b: Lattice assembly parts 5, 6, 7, 8: Lattice structure 10: First lattice member 11:First inner plate 12: Hanging board 13: Top board 14, 14a: Interconnecting pieces for lattice members 15, 15a, 33, 33a, 51: Lattice frame connecting pieces 16: Cut section 17: Punch hole 18: Junction hole 19, 19a, 43, 43a, 49, 53, 54: Lattice frame joining holes 21: First lattice member, first bend 22: First lattice member, second bend 23: First lattice member, third bend 24, 42, 52: Lattice frame joint bending 30, 30a: Second grid member 31:Second inner plate 32, 32a: Lower plate 34: Riser 36: Cut section 37: Hole 38: Junction hole 39: Upper end notch 41: Second lattice member, first bend 44: Second lattice member rising bend 60, 60i, 60a, 60ai: First frame member 70, 70i, 70a, 70ai: Second frame member 61, 71: Frame vertical board 62, 72: Frame hanging board 63, 73: Frame top plate 64, 74: Frame riser plate 65, 75: Frame bottom plate 66, 76: Frame first bend 67, 77: Frame second bend 68, 78: Third frame bend 69, 79: Frame fourth bend 81: Frame interlocking piece 82: Frame mutual joint, one-sided bending 83, 83a, 88, 88a, 86, 89: Frame grid joint holes 84, 85: Frame interlocking holes

Claims

1. A plurality of first grid members are formed by cutting out strip-shaped metal sheets into a predetermined shape and then bending the strip-shaped metal sheets in the longitudinal direction, It consists of multiple second grid members formed by cutting out strip-shaped metal sheets into a predetermined shape and then bending the strip-shaped metal sheets in the longitudinal direction. The punching process results in the plurality of first lattice members and the plurality of second lattice members facing each other and sandwiching each other at approximately right angles, A metal sheet lattice structure is formed in which the plurality of first lattice members and the plurality of second lattice members are combined in a substantially orthogonal shape to each other, by performing the bending process that forms overlapping surface contact between each of the plurality of first lattice members and the plurality of second lattice members.

2. The metal sheet lattice structure according to claim 1, wherein the plurality of first lattice members and the plurality of second lattice members are provided with joining holes by the punching process, which allow them to be joined to each other using various joining methods.

3. The metal sheet lattice structure according to claim 2, wherein each of the plurality of first lattice members and the plurality of second lattice members is provided with holes for weight reduction by the punching process.

4. The metal sheet lattice structure according to claim 2, wherein the upper ends of the plurality of second lattice members are provided with notches by the punching process.

5. A metal sheet lattice assembly according to any one of claims 2 to 4, wherein a frame member surrounding the lattice structure is attached.

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