Laboratory table

Abstract

This laboratory table (10) comprises a pair of support columns (12) and a beam part (13). Each of the support columns (12) has an overlapping part (31) in which both ends of a second support column wall (27) are overlapping in two layers with both ends of a first support column wall (25) from the inside of the first support column wall (25), and is formed to have a closed cross section. The beam part (13) is disposed between the pair of support columns (12) and is attached to the overlapping parts (31).

Description

Experimental table

[0001] This application claims priority from Japanese Patent Application No. 2024-128988, filed on August 5, 2024, the contents of which are incorporated herein by reference.

[0002] Known laboratory tables are installed in research laboratories, universities, etc., for use in experimental work and for placing experimental instruments and devices on them. The laboratory table, for example, has a pair of support columns spaced apart on the left and right sides, the pair of support columns connected by a beam, brackets attached to the front and rear walls of the pair of support columns, and a top plate disposed on the beam and the pair of brackets (see, for example, Patent Document 1).

[0003] Japanese Patent Application Publication No. 2016-107168

[0004] Here, it is preferable that the laboratory table has a wide top surface so that it can be used for experimental work when laboratory instruments and equipment are placed on the top surface. However, in order to maintain the laboratory table in a stable state, it is necessary to firmly connect a pair of supports with a beam section to ensure the rigidity of the connection between the pair of supports and the beam section.

[0005] An object of one aspect of the present invention is to provide a laboratory bench that can ensure the rigidity of the connection between a pair of support columns and a beam portion.

[0006] The laboratory bench according to the first aspect of the present invention comprises a pair of support columns formed with a closed cross section, each having an overlapping portion where both ends of a second support wall are overlapped from the inside onto both ends of a first support wall; and a beam portion disposed between the pair of support columns and attached to the overlapping portion.

[0007] With this configuration, both ends of the first support wall and both ends of the second support wall are overlapped to form an overlapping portion. This increases the rigidity of the overlapping portion. A beam portion is attached to this overlapping portion. This allows the beam portion to be firmly attached to the overlapping portion. This ensures the rigidity of the connection between the pair of support columns and the beam portion.

[0008] In a second aspect, in the laboratory bench according to the first aspect, the second support wall may have a step portion along both ends of the first support wall.

[0009] With this configuration, the second support wall has a step portion. The step portion has increased strength due to, for example, the bending of the second support wall. Therefore, the overlapping portion can be reinforced by the step portion. This allows the beam portion to be attached to the overlapping portion more firmly.

[0010] In a third aspect, in the laboratory table according to the first or second aspect, weld nuts may be provided on the inner surfaces of both ends of the second support wall facing the inside of the closed cross section, and the weld nuts may be threadedly connected to fastening portions that pass through the beam portion and the overlapping portion.

[0011] With this configuration, weld nuts are provided on both ends of the second support wall, which allows the overlapping portion to be reinforced with the weld nuts, thereby enabling the beam portion to be attached to the overlapping portion more firmly.

[0012] According to this aspect of the present invention, the rigidity of the connection portion formed by the pair of support posts and beam portions can be ensured.

[0013] Fig. 1 is a perspective view showing a laboratory table according to an embodiment of the present invention. Fig. 2 is a perspective view showing the laboratory table of Fig. 1 in an exploded state. Fig. 3 is a perspective view showing the support body and first beam of the embodiment in an exploded state. Fig. 4 is a cross-sectional view of the laboratory table of Fig. 1 taken along line IV-IV. Fig. 5 is a perspective view showing the support body and first bracket of the embodiment in an exploded state. Fig. 6 is a cross-sectional view showing the first bracket attached to the support body of the embodiment.

[0014] A laboratory table according to one embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of the laboratory table. FIG. 2 is a perspective view showing the laboratory table in an exploded state. <Laboratory Table> As shown in FIGS. 1 and 2, the laboratory table 10 is installed on a floor F in, for example, a research laboratory or a university laboratory, and is used for experimental work and for placing laboratory instruments and devices on it. In the drawings, the forward direction is indicated by an arrow Fr, the rearward direction by an arrow Rr, the leftward direction by an arrow L, and the rightward direction by an arrow R. The upward direction is indicated by an arrow U, and the downward direction by an arrow D. The laboratory table 10 includes, for example, a pair of support columns 12, a beam 13, a pair of first brackets 14, a plurality of first drawers 15, a pair of second brackets 16, a plurality of second drawers 17, and a top panel 18.

[0015] <Pair of Supports> The pair of support posts 12 are arranged with a gap between them in the left-right direction. Of the pair of support posts 12, one support post 12 is arranged on the left side, and the other support post 12 is arranged on the right side. The one support post 12 and the other support post 12 are formed symmetrically. Hereinafter, the left support post 12 will be described as the "support post 12," and a description of the right support post 12 will be omitted. The support post 12 includes a support main body 21 and legs 22.

[0016] FIG. 3 is an exploded perspective view showing an enlarged view of section III in FIG. 2. FIG. 4 is a cross-sectional view of the laboratory bench shown in FIG. 1 taken along line IV-IV. As shown in FIGS. 3 and 4, the support body 21 includes a first support wall 25, a pair of ribs 26, and a second support wall 27. The first support wall 25, the pair of ribs 26, and the second support wall 27 are formed, for example, from steel plates having a thickness of 1.6 mm. The support body 21 has a closed cross section formed by joining the first support wall 25 and the second support wall 27 at an overlapping portion 31. The overlapping portion 31 will be described in detail later.

[0017] The first support wall 25 has an outer wall 41, an upper flap 42, a front wall 43, a front flap 44, a rear wall 45, and a rear flap 46. The outer wall 41 is formed in a rectangular shape that is raised in the vertical direction when viewed from the outside left of the laboratory table 10. The upper flap 42 is, for example, bent rightward from the upper edge of the outer wall 41 toward the inside of the laboratory table 10, perpendicular to the outer wall 41.

[0018] The front wall 43 is, for example, bent rightward from the front edge of the outer wall 41 toward the inside of the laboratory table 10, perpendicular to the outer wall 41. The front wall 43 has a plurality of elongated holes 48 extending in the vertical direction. The plurality of elongated holes 48 penetrate the front wall 43 in the front-rear direction and are spaced apart in the vertical direction. In the embodiment, three elongated holes 48 are described as an example, but the number of elongated holes 48 can be selected as desired.

[0019] The front flap 44 is, for example, folded from the inner edge of the front wall 43 toward the rear, perpendicular to the front wall 43. The front flap 44 is arranged parallel to the outer wall 41. The front flap 44 has a plurality of through holes 49. The plurality of through holes 49 penetrate the front flap 44 in the left-right direction and are spaced apart in the up-down direction. In the embodiment, an example is described in which there are two through holes 49, but the number of through holes 49 can be selected as desired.

[0020] The rear wall 45 is, for example, bent rightward from the rear edge of the outer wall 41 toward the inside of the laboratory table 10, perpendicular to the outer wall 41. The rear wall 45 has a plurality of elongated holes 51 extending in the vertical direction. The plurality of elongated holes 51 penetrate the rear wall 45 in the front-to-rear direction and are spaced apart in the vertical direction. In the embodiment, three elongated holes 51 are used as an example, but the number of elongated holes 51 can be selected as desired.

[0021] The rear flap 46 is, for example, bent rearward from the inner edge of the rear wall 45, perpendicular to the rear wall 45. The rear flap 46 is arranged parallel to the outer wall 41. The rear flap 46 has a plurality of through holes 52. The through holes 52 penetrate the rear flap 46 in the left-right direction and are spaced apart in the up-down direction. In the embodiment, an example is described in which there are two through holes 52, but the number of through holes 52 can be selected as desired.

[0022] The pair of ribs 26 are provided on the rear surface of the outer wall 41 at a distance from each other in the front-to-rear direction. The pair of ribs 26 extend in the up-and-down direction along the rear surface of the outer wall 41. The rib 26 is formed, for example, with a U-shaped cross-section 54 and a pair of flanges 55, so as to have a hat-shaped cross section. The pair of flanges 55 of the rib 26 are joined to the rear surface of the outer wall 41 by welding. A reagent shelf (not shown) is attached to the pair of ribs 26.

[0023] The second support wall 27 has an inner wall 61, a front step portion (step portion) 62, a first overlapping portion 63, a first overlapping flap 64, a rear step portion (step portion) 65, a second overlapping portion 66, and a second overlapping flap 67. The inner wall 61 is disposed, for example, spaced apart from the outer wall 41 in the left-right direction on the inside (i.e., right side) of the laboratory table 10. The inner wall 61 is formed in a rectangular shape that is raised in the vertical direction when viewed from the inside left of the laboratory table 10.

[0024] The inner wall 61 is disposed between the front flap 44 and the rear flap 46 of the first support wall 25. The inner wall 61, the front flap 44, and the rear flap 46 form an inner wall 71 of the support 12. The inner wall 61 is disposed flush with the front flap 44 and the rear flap 46. In other words, the inner wall 71 of the support 12 is formed flat by the inner wall 61, the front flap 44, and the rear flap 46.

[0025] The front step portion 62 is, for example, bent from the front edge of the inner wall 61 toward the inside of the support main body 21. The front step portion 62 is arranged along the front flap 44 in a state close to the inner edge of the front flap 44. The first overlapping portion 63 is bent from the front edge of the front step portion 62 and is arranged inside the support 12 with respect to the front flap 44. The first overlapping portion 63 is arranged along the front flap 44.

[0026] The first overlapping portion 63 has a plurality of through holes 73. The plurality of through holes 73 penetrate the first overlapping portion 63 in the left-right direction and are spaced apart in the up-down direction. The plurality of through holes 73 are arranged in positions facing the plurality of through holes 49 in the front flap 44. In the embodiment, an example is described in which there are two through holes 73, but the number of through holes 73 can be selected as desired. A plurality of weld nuts 75 are provided on the inner surface of the first overlapping portion 63. The weld nuts 75 are arranged in positions corresponding to the plurality of through holes 73 and the plurality of through holes 49.

[0027] For example, the first overlapping flap 64 is folded perpendicular to the first overlapping portion 63 from the front edge of the first overlapping portion 63 toward the outer wall 41. The first overlapping flap 64 is arranged along the front wall 43. The first overlapping flap 64 has a plurality of elongated holes 77 extending in the up-down direction. The plurality of elongated holes 77 penetrate the first overlapping flap 64 in the front-rear direction and are spaced apart in the up-down direction. The plurality of elongated holes 77 are arranged in positions facing the plurality of elongated holes 48 in the front wall 43. In the embodiment, three elongated holes 77 are described as an example, but the number of elongated holes 77 can be selected as desired.

[0028] The rear step portion 65 is, for example, bent from the rear edge of the inner wall 61 toward the inside of the support post 12. The rear step portion 65 is arranged along the rear flap 46 in a state close to the inner edge of the rear flap 46. The second overlapping portion 66 is bent from the rear edge of the rear step portion 65 and is arranged inside the support post 12 with respect to the rear flap 46. The second overlapping portion 66 is arranged along the rear flap 46.

[0029] The second overlapping portion 66 has a plurality of through holes (not shown). The plurality of through holes penetrates the second overlapping portion 66 in the left-right direction and is spaced apart in the up-down direction. The plurality of through holes are arranged in positions facing the plurality of through holes 52 in the rear flap 46. In the embodiment, the second overlapping portion 66 has two through holes, but the number of through holes in the second overlapping portion 66 can be selected arbitrarily. A plurality of weld nuts (not shown) are provided on the inner surface of the second overlapping portion 66. The weld nuts (not shown) are arranged in positions corresponding to the plurality of through holes (not shown) and the plurality of through holes 52 in the second overlapping portion 66.

[0030] For example, the second overlapping flap 67 is folded perpendicular to the second overlapping portion 66 from the rear edge of the second overlapping portion 66 toward the outer wall 41. The second overlapping flap 67 is arranged along the rear wall 45. The second overlapping flap 67 has multiple elongated holes (not shown). The multiple elongated holes in the second overlapping flap 67 penetrate the second overlapping flap 67 in the front-to-rear direction and are spaced apart in the up-down direction. The multiple elongated holes in the second overlapping flap 67 are arranged in positions facing the multiple elongated holes 51 in the rear wall 45. In the embodiment, the second overlapping flap 67 has three elongated holes as an example, but the number of elongated holes in the second overlapping flap 67 can be selected as desired.

[0031] Here, the support main body 21 is formed with a closed cross section by joining the first support wall 25 and the second support wall 27 at an overlapping portion 31. The overlapping portion 31 has a first overlapping portion 32 and a second overlapping portion 33. The first overlapping portion 32 is joined by welding, for example, in a state in which the first overlapping flap 64 of the second support wall 27 is overlapped twice on the front wall 43 of the first support wall 25, and further, the first overlapping portion 63 of the second support wall 27 is overlapped twice on the front flap 44 of the first support wall 25. Furthermore, the second overlapping portion 33 is joined by welding, for example, in a state in which the second overlapping flap 67 of the second support wall 27 is overlapped twice on the rear wall 45 of the first support wall 25, and further, the second overlapping portion 66 of the second support wall 27 is overlapped twice on the rear flap 46 of the first support wall 25.

[0032] The front wall 43 and front flap 44 of the first support wall 25 constitute the front end of the first support wall 25. Therefore, the front end of the first support wall 25 is a highly rigid portion formed with an L-shaped cross section by the front wall 43 and the front flap 44. The rear wall 45 and rear flap 46 of the first support wall 25 constitute the rear end of the first support wall 25. The rear end of the first support wall 25 is a highly rigid portion formed with an L-shaped cross section by the rear wall 45 and the rear flap 46.

[0033] Furthermore, the first overlapping portion 63 and the first overlapping flap 64 of the second support wall 27 constitute the front end of the second support wall 27. The front end of the second support wall 27 is a highly rigid portion formed with an L-shaped cross section by the first overlapping portion 63 and the first overlapping flap 64. The second overlapping portion 66 and the second overlapping flap 67 of the second support wall 27 constitute the rear end of the second support wall 27. The rear end of the second support wall 27 is a highly rigid portion formed with an L-shaped cross section by the second overlapping portion 66 and the second overlapping flap 67.

[0034] Therefore, the front end of the first support wall 25 and the front end of the second support wall 27 are joined by welding to form a first overlapping portion 32. Furthermore, the rear end of the first support wall 25 and the rear end of the second support wall 27 are joined by welding to form a second overlapping portion 33. In other words, the overlapping portion 31 is joined by doubly overlapping and welding both ends (front end and rear end) of the first support wall 25 and both ends (front end and rear end) of the second support wall 27.

[0035] 1 and 2, the legs 22 are provided at the lower end of the support body 21. The legs 22 extend in the front-to-rear direction relative to the lower end of the support body 21. By placing the legs 22 on the floor surface F, the support body 21 is maintained in a state where it is raised from the floor surface F.

[0036] <Beam section> As shown in Figures 1 and 2, the beam section 13 is disposed between a pair of support columns 12. The beam section 13 extends in the left-right direction. The beam section 13 includes a first beam 81, a second beam 82, and a third beam 83. The first beam 81, the second beam 82, and the third beam 83 are formed, for example, from steel plates having a thickness of 1.6 mm. The first beam 81 and the second beam 82 are formed symmetrically in the front-rear direction. Therefore, the following description will focus on the first beam 81, and a description of the second beam 82 will be omitted.

[0037] As shown in Figures 3 and 4, the first beam 81 has an exterior wall beam 91, an upper wall beam 92, an interior wall beam 93, an upper flap beam 94, a lower wall beam 95, a lower flap beam 96, and a pair of joints 97. The exterior wall beam 91 is disposed between a pair of supports 12 and extends in the left-right direction. The exterior wall beam 91 is formed in a rectangular shape extending in the horizontal direction when viewed from the front. The upper wall beam 92 is, for example, bent from the upper edge of the exterior wall beam 91 toward the second beam 82 (see Figure 1) so as to be perpendicular to the exterior wall beam 91.

[0038] The inner wall beam 93 is, for example, bent downward from the inner side of the upper wall beam 92, perpendicular to the upper wall beam 92. The upper flap beam 94 is, for example, bent from the lower side of the inner wall beam 93, perpendicular to the inner wall beam 93, toward the outer wall beam 91. The lower wall beam 95 is, for example, bent from the lower side of the outer wall beam 91, perpendicular to the outer wall beam 91, toward the second beam 82 (see FIG. 1). The lower flap beam 96 is, for example, bent upward from the inner side of the lower wall beam 95, perpendicular to the lower wall beam 95.

[0039] As shown in Figures 2 to 4, a pair of joints 97 are provided on the left and right sides of the exterior wall beam 91. The pair of joints 97 are formed symmetrically. Therefore, hereinafter, the joint 97 on the left side will be described as the joint 97, and a description of the joint 97 on the right side will be omitted. The joint 97 is bent inward from the left side of the exterior wall beam 91, perpendicular to the exterior wall beam 91. The joint 97 has multiple through holes 98. The multiple through holes 98 penetrate the joint 97 in the left-right direction and are spaced apart in the up-down direction. The multiple through holes 98 are positioned opposite the multiple through holes 49 in the front flap 44. In the embodiment, two through holes 98 are described as an example of the multiple through holes 98, but the number of through holes 98 can be selected as desired.

[0040] As shown in Figures 2 and 3, the third beam 83 is joined to, for example, the lower flap beam 96 of the first beam 81 and the lower flap beam 96 of the second beam 82. The beam portion 13 is formed in a U-shape by the first beam 81, the second beam 82, and the third beam 83. The left end of the beam portion 13 is attached to the left-side support body 21. The right end of the beam portion 13 is attached to the right-side support body 21. The configuration in which the left end of the beam portion 13 is attached to the left-side support body 21 is bilaterally symmetrical with the configuration in which the right end of the beam portion 13 is attached to the right-side support body 21. Therefore, hereinafter, an example in which the left end of the beam portion 13 is attached to the left-side support body 21 will be described, and an example in which the right end of the beam portion 13 is attached to the right-side support body 21 will be omitted.

[0041] As shown in FIGS. 3 and 4 , the joint 97 of the first beam 81 is attached to the front flap 44 and the first overlapping portion 63 at the first overlapping portion 32 by fastening portions 101. In the embodiment, a "bolt 101" will be described as an example of the fastening portion 101. Specifically, the bolt 101 is inserted through the through hole 98 of the joint 97, the through hole 49 of the front flap 44, and the through hole 73 of the first overlapping portion 63 from the first beam 81 side. The inserted bolt 101 is threadedly coupled to the weld nut 75 of the first overlapping portion 63. Thus, the joint 97 is attached to the front flap 44 and the first overlapping portion 63 by the bolt 101. In the embodiment, two bolts 101 will be described as an example, but the number of bolts 101 can be selected arbitrarily.

[0042] 1 and 2 , a first beam 81 is attached to the first overlapping portion 32 of the support body 21. Similarly, a second beam 82 is attached to the second overlapping portion 33 of the support body 21. As a result, the left end of the beam portion 13 is attached to the left support body 21. Also, the right end of the beam portion 13 is attached to the right support body 21.

[0043] <First bracket, first drawer, second bracket, second drawer, top plate> A pair of first brackets 14 is attached to the front sides of the left-side support body 21 and the right-side support body 21. A plurality of first drawers 15 are arranged by the pair of first brackets 14 and a plurality of first support brackets 105. In addition, a pair of second brackets 16 is attached to the rear sides of the left-side support body 21 and the right-side support body 21. A plurality of second drawers 17 are arranged by the pair of second brackets 16 and a plurality of second support brackets 106. In this state, a top plate 18 is attached from above to the pair of support columns 12, beams 13, pair of first brackets 14, pair of second brackets 16, etc.

[0044] The pair of first brackets 14 and the pair of second brackets 16 are similarly attached to the left and right support body 21. Therefore, hereinafter, an example of attaching one first bracket 14 to the left support body 21 will be described with reference to Figures 5 and 6, and an explanation of attaching the other brackets will be omitted.

[0045] <First Bracket> Figure 5 is a perspective view showing the left support column body and the first bracket disassembled. Figure 6 is a cross-sectional view showing the left support column body and the first bracket attached. As shown in Figures 5 and 6, the first bracket 14 is formed, for example, from a steel plate with a thickness of 1.6 mm. The first bracket 14 has a plurality of locking claws 112. In the embodiment, three locking claws 112 are described as an example, but the number of locking claws 112 can be selected arbitrarily.

[0046] The multiple locking claws 112 are locked in the first overlapping portion 32 while inserted into the elongated holes 48 of the front wall 43 and the elongated holes 77 of the first overlapping flap 64. In this way, the first bracket 14 is attached to the front wall 43 and the first overlapping flap 64 (first overlapping portion 32) by the multiple locking claws 112.

[0047] 1 and 2, another first bracket 14 is also attached to the first overlapping portion 32. Furthermore, a pair of second brackets 16 are also attached to the second overlapping portion 33.

[0048] As described above, according to the experimental table 10 of the embodiment, as shown in FIGS. 3 and 4 , the front end of the first support wall 25 is formed by the front wall 43 and the front flap 44. The rear end of the first support wall 25 is formed by the rear wall 45 and the rear flap 46. The front end of the second support wall 27 is formed by the first overlapping portion 63 and the first overlapping flap 64. The rear end of the second support wall 27 is formed by the second overlapping portion 66 and the second overlapping flap 67. Furthermore, the front end of the first support wall 25 and the front end of the second support wall 27 are joined by welding to form the first overlapping portion 32. The rear end of the first support wall 25 and the rear end of the second support wall 27 are joined by welding to form the second overlapping portion 33. The first overlapping portion 32 and the second overlapping portion 33 form the overlapping portion 31.

[0049] That is, the overlapping portion 31 is formed by doubly overlapping and joining both ends (front and rear ends) of the first support wall 25 and both ends (front and rear ends) of the second support wall 27. This increases the rigidity of the overlapping portion 31. The first beam 81 and second beam 82 of the beam portion 13 are attached to this overlapping portion 31. This allows the beam portion 13 to be firmly attached to the overlapping portion 31. This ensures the rigidity of the connection between the pair of support columns 12 and the beam portion 13. As a result, the laboratory table 10 can be maintained in a stable state.

[0050] The second support wall 27 also has a front step portion 62 and a rear step portion 65. The strength of the front step portion 62 and the rear step portion 65 is increased by, for example, bending the second support wall 27. The front step portion 62 is disposed along the front flap 44 of the first support wall 25. The rear step portion 65 is disposed along the rear flap 46 of the first support wall 25. Therefore, the overlapping portion 31 can be reinforced by the front step portion 62 and the rear step portion 65. This allows the beam portion 13 to be attached to the overlapping portion 31 even more firmly.

[0051] Furthermore, the front step portion 62 is disposed close to the inner side of the front flap 44. Moreover, the rear step portion 65 is disposed close to the inner side of the rear flap 46. This allows the overlapping portion 31 to be more appropriately reinforced by the front step portion 62 and the rear step portion 65.

[0052] In addition, weld nuts 75 are provided on both ends of the second support wall (specifically, the first overlapping portion 63 and the second overlapping portion 66). This allows the overlapping portion 31 to be reinforced with the weld nuts 75. This allows the beam portion 13 to be attached to the overlapping portion 31 even more firmly.

[0053] Furthermore, in the first support wall 25, the upper flap 42 is bent inward from the upper edge of the outer wall 41. Therefore, the first support wall 25 can be reinforced by the upper flap 42. This allows the beam portion 13 to be attached to the overlapping portion 31 even more firmly.

[0054] 5 and 6 , the first bracket 14 is attached to the front wall 43 and the first overlapping flap 64 by a plurality of locking claws 112. The front wall 43 and the first overlapping flap 64 are overlapped twice to form part of the first overlapping portion 32. In other words, the first bracket 14 is attached to the first overlapping portion 32, which has high rigidity.

[0055] 1 and 2, the other first bracket 14 is also attached to the highly rigid first overlapping portion 32. Furthermore, the pair of second brackets 16 are also attached to the highly rigid second overlapping portion 33. This allows the laboratory table 10 to stably attach the top plate 18 to the pair of support body portions 21, the beam portion 13, the pair of first brackets 14, and the pair of second brackets 16.

[0056] The technical scope of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

[0057] In the above embodiment, the first support wall 25, the pair of ribs 26, and the second support wall 27 were formed of, for example, steel plates having a thickness of 1.6 mm. The first beam 81, the second beam 82, and the third beam 83 of the beam portion 13 were also formed of steel plates having a thickness of 1.6 mm. The first bracket 14 was also formed of a steel plate having a thickness of 1.6 mm. However, the thicknesses and materials of the first support wall 25, the pair of ribs 26, the second support wall 27, the first beam 81, the second beam 82, the third beam 83, and the first bracket 14 are not limited to those in the above embodiment. For example, the thicknesses of the first support wall 25, the pair of ribs 26, the second support wall 27, the first beam 81, the second beam 82, the third beam 83, and the first bracket 14 may be 1.2 mm, or the thicknesses of the respective components may be different. Furthermore, the first support wall 25, the pair of ribs 26, the second support wall 27, the first beam 81, the second beam 82, the third beam 83, and the first bracket 14 may be partially formed from a material such as aluminum.

[0058] In the above embodiment, the second support wall 27 includes an inner wall 61, a front step portion (step portion) 62, a first overlap portion 63, a first overlap flap 64, a rear step portion (step portion) 65, a second overlap portion 66, and a second overlap flap 67. The first overlap portion 63 and the second overlap portion 66 each have a plurality of through holes. A plurality of weld nuts are provided on the inner surface of the first overlap portion 63 and the inner surface of the second overlap portion 66, respectively, and the bolts 101 are fastened to the weld nuts of the first overlap portion 63 and the second overlap portion 66. However, the form of the fastening portion 101 is not limited to the above embodiment. For example, stud bolts may be provided on the inner surface of the first overlap portion 63 and the inner surface of the second overlap portion 66 so as to pass through the through holes, and the stud bolts may be fastened with nuts.

[0059] In the above embodiment, a single laboratory bench 10 has been described, but it is also possible to use a plurality of laboratory benches 10. For example, a plurality of laboratory benches 10 may be lined up on the left and right sides of a single laboratory bench 10.

[0060] In the above embodiment, the second support wall 27 has a front step portion 62 bent from the front edge of the inner wall 61 toward the inside of the support body 21, and a rear step portion 65 bent from the rear edge of the inner wall 61 toward the inside of the support 12, but the second support wall 27 does not have to have the front step portion 62 and the rear step portion 65. However, by having the front step portion 62 and the rear step portion 65, the second support wall 27 has an advantage in that the section modulus is improved and the overlap portion 31 can be more appropriately reinforced by the front step portion 62 and the rear step portion 65.

[0061] In addition, within the scope of the spirit of the present invention, the components in the above-described embodiments may be replaced with well-known components as appropriate, and the above-described modified examples may be combined as appropriate.

[0062] DESCRIPTION OF SYMBOLS 10...Experiment bench 12...Support 13...Beam portion 21...Support body 25...First support wall 27...Second support wall 31...Overlap portion 32...First overlap portion 33...Second overlap portion 62...Front step portion (step portion) 65...Rear step portion (step portion) 75...Welded nut 101...Bolt (fastening portion)

Claims

1. A laboratory table comprising: a pair of support columns formed with a closed cross section, each having an overlapping section where both ends of a second support column wall are overlapped from the inside twice onto both ends of a first support column wall; and a beam section disposed between the pair of support columns and attached to the overlapping section.

2. The laboratory bench of claim 1, wherein the second support wall has a step along each end of the first support wall.

3. A laboratory bench as described in claim 1 or claim 2, wherein weld nuts are provided on the inner surfaces of both ends of the second support wall facing the inside of the closed cross section, and fastening portions that pass through the beam portion and the overlapping portion are screwed to the weld nuts.

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