Cable rack support material

Abstract

To provide a cable rack support material that can be easily manufactured in accordance with the rack width of various types of cable racks. [Solution] The cable rack support 1 comprises a base plate 2 and an arm 4 fixed at a right angle to the surface of the base plate 2. The arm 4 is formed by bending a single steel plate into a Z-shape so that the upper and lower top plate sections 5, 5, a central sloped section 7 having a fastening hole 11, and a pair of vertical sections 6, 6 form a crease between them. A vibration-proof bracket 30 is attached to the fastening hole 11.

Description

[Technical Field]

[0001] The present invention relates to a cable rack support for supporting a cable rack, and more particularly to a cable rack support that can be easily manufactured for cable racks with a variety of rack widths. [Background technology]

[0002] Cable racks that house power and control signal cables are mounted on cable rack supports that protrude in a cantilevered manner from the wall of a facility such as a factory or underground passage. Known cable rack support structures include those with U-shaped arms (Patent Document 1), those with gate-like arms (Patent Document 2), those with L-shaped arms (Patent Document 3), and those with rectangular pillar-shaped arms (Patent Document 4). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 61-153412 [Patent Document 2] Publication No. 3051593 [Patent Document 3] Japanese Patent Application Laid-Open No. 2009-106033 [Patent Document 4] Japanese Patent Application Publication No. 9-224314 DISCLOSURE OF THE INVENTION [Problem to be solved by the invention]

[0004] Cable racks come in a variety of widths depending on the amount of cable they can accommodate. Conventional cantilever-shaped cable rack support materials are manufactured to accommodate different rack widths. Depending on the rack width, measures must be considered, such as changing the length of the protruding arms and increasing the strength of the arms.

[0005] On the other hand, it is possible to leave the arm structure as it is to a certain extent by adopting a structure in which the arms of the cable rack support material, which protrude like beams, are supported from below by knee braces, but the presence of the knee braces limits the use of the space directly below the cable rack.

[0006] The present invention has been made to solve the above problems, and its purpose is to provide a cable rack support that can be easily manufactured to fit the rack width dimensions of different types of cable racks. [Means for solving the problem]

[0007] The cable rack support of the present invention comprises a base plate fixed to the wall of the facility or to a vertical member attached to the wall; The base plate is fixed by welding at right angles to the surface of the base plate, and is provided with a pair of horizontal top plate portions, a pair of vertical portions, and a sloped portion inclined relative to the horizontal and having a fastening hole, and an arm formed by bending a single steel plate into a Z shape so that the pair of vertical portions are formed on both sides of the sloped portion as the center, and the pair of top plate portions are formed on both sides of the pair of vertical portions, The stopper holes are perforated for attaching metal fittings that prevent the cable rack mounted on the upper top plate from swinging out. [Effects of the Invention]

[0008] According to this invention, the arms are bent in a Z-shape, which improves their strength. As long as the rack width of the cable rack is within a specified length range, the thickness and size of the base plate member and the thickness and size excluding the length of the arm member remain the same, and the required cable rack support material can be provided to customers simply by changing the length of the arm member according to the rack width to be installed.

[0009] According to this invention, the cable rack support has a sloped surface with marking holes, the number of which varies depending on the rack width. The slope of the surface prevents dust from sliding down and accumulating, making the marking holes less likely to become blocked. Furthermore, the marking holes on the sloped surface are easily visible when viewed from a sideways angle rather than directly below, without being hidden by the lower top panel. Therefore, even when updating equipment long after installation, the rack width can be easily observed by checking the number of markings from below using a magnifying glass. [Brief explanation of the drawings]

[0010] [Figure 1] 1A and 1B show a cable rack support, with FIG. 1A being a perspective view and FIG. 1B being a front view. [Figure 2] FIG. 10 is a diagram showing the cable rack mounted on the cable rack support. [Figure 3] 3A to 3E show examples of fabrication of a cable rack support and an example of installation of the cable rack support (FIG. 3F). BEST MODE FOR CARRYING OUT THE INVENTION

[0011] [Embodiment 1] The cable rack support member 1 of the present invention will be described below with reference to the drawings. FIG. 1 shows a wall-mounted cable rack support member 1, also known as a bracket, with FIG. 1A being a perspective view and FIG. 1B being a front view. The cable rack support member 1 has a base plate 2 and an arm 4. The cable rack support member 1 is 180° rotationally symmetrical about a center line c, allowing it to be used either upside down or upside down. The base plate 2 is fixed to the wall of a facility such as a factory or underground passage, or to a vertical member attached to the wall, using bolts or the like (not shown) in fixing holes 3 drilled at the top and bottom of the base plate 2. In this embodiment, the base plate 2 is made of a steel plate with a thickness of 6 mm, a width w2 of 150 mm, and a height h1 of 250 mm.

[0012] The arm 4 is a beam-shaped member that mounts the cable rack and is fixed to the base plate 2 by welding at a right angle. The arm 4 is formed by bending a single steel plate into a Z-shape, with a pair of horizontal top plate sections 5, 5 at the top and bottom, a pair of vertical sections 6, 6 at the top and bottom, and a slope section 7 that is inclined relative to the horizontal, with a crease between them. A pair of vertical sections 6, 6 are formed on both sides of a central slope section 71, and a pair of top plate sections 5, 5 are further formed continuously on both sides of the vertical sections 6, 6. In this embodiment, a 4.5 mm thick steel plate is used as the component for the arm 4. The upper and lower top plate sections 5, 5 are drilled with multiple through holes 10 to reduce weight (the lower top plate section 5 is hidden by the lower vertical section 6 in the drawing). The slope section 7 has elongated stop holes 11 drilled at its four corners. Additionally, multiple display holes 12 are arranged in a straight line along the length of arm 4, and the number of display holes 12 corresponds to the width of the rack that can be mounted, or the length L of arm 4. In the figure, six display holes 12 are provided at equal intervals, indicating that the cable rack support member 1 is capable of mounting a cable rack with a rack width of 600 mm (arm 4 length L = 700 mm).

[0013] The upper top panel 5 provides a horizontal surface on which the cable rack is mounted. The sloped surface 7 has an inclination angle θ of 45° or less with respect to the horizontal surface of the top panel 5. The vertical portions 6, 6 are provided perpendicular to the horizontal surface so that the distance between the top panels 5, 5 is not large and the inclination angle θ of the sloped surface 7 does not exceed 45°. The inclination angle of the sloped surface 7 is set to 45° or less because a larger inclination angle θ would increase the distance between the top panels 5, 5 and make it difficult to attach the metal fittings (described below) for attaching the cable rack to the fastening holes 11. The inclination angle θ is set at an angle that allows dust inside the facility to slide off easily and also prevents the display hole 12 from being hidden by the lower top panel 5 so that the display hole 12 is easily visible from below. Therefore, the inclination angle θ is preferably in the range of 45° to 20°, and in this embodiment, the width w3 of the top plate portions 5, 5 is 100 mm, the height h2 of the vertical portions 6, 6 is 50 mm, and the inclination angle θ of the inclined portion 7 is 28°.

[0014] 2 shows the cable rack 20 mounted on the cable rack support 1. The cable rack 20 is fixed by being pressed against the cable rack 20 by an anti-vibration bracket 30. The anti-vibration bracket 30 is equipped with a clamp 31 and a hook 34. The clamp 31 is U-shaped and is hung on the side rail 21 of the cable rack 20. Reference numeral 22 denotes a hanger.

[0015] The hook 34 has a key-shaped tip that is inserted into the fastening hole 11, while the rear end of the hook 34 is inserted into a through hole 33 provided in the bracket 32 ​​of the clamping fixture 31, and the cable rack support material 1 is attracted to and fixed to the cable rack 20 by the bolt 35 and washer 34.

[0016] FIG. 3 shows an example of manufacturing the cable rack support 1 (FIGS. 3A to 3E) and an example of installation (FIG. 3F). In this embodiment, the cable rack support 1 is shown to be used for various types of cable racks 20 with different rack widths. The rack widths of the cable racks 20 to be mounted are 600mm, 500mm, 400mm, 300mm, and 200mm, in the order shown in Figures 3A to 3E. The thickness and size of the steel plates used for the base plate 2 and arm 4 are all the same, except for the length L of the arm 4. The spacing between the display holes 12 is also the same. Therefore, the number of display holes 12 varies depending on the rack width. The number of display holes 12 is 6, 5, 4, 3, and 2, in the order shown in Figures 3A to 3E.

[0017] The analysis results for the cable rack support 1 of Figures 3A to 3E are shown below, according to the specifications of this embodiment. The required yield strength is 235.0 N / mm 2 With a safety factor of 1.5, the maximum strength for cable rack support 1 is 156.0N / mm 2 If there was no part where stress up to this point occurred, the test piece was deemed to have passed. The results are shown below.

[0018] Cable rack support material 1 in Figure 3A for rack width 600 mm L=700mm, Load capacity 238Kg / m, Maximum stress 118.0N / mm 2 Cable rack support material 1 in Figure 3B for rack width 500 mm L=600mm, Load capacity 222Kg / m, Maximum stress 135.0N / mm 2 Cable rack support material 1 in Figure 3C for rack width 400 mm L=500mm, Load capacity 206Kg / m, Maximum stress 146.7N / mm 2 Cable rack support 1 in Figure 3D for rack width 300 mm L=400mm, load capacity 60kg / m, maximum stress 77.4N / mm 2 Cable rack support 1 in Figure 3E for rack width 200 mm L=300mm, load capacity 44kg / m, maximum stress 59.5N / mm 2 The stress tended to be high near the joint between the upper top plate 5 and the base plate 2 and near the tip of the arm 4, but the area where the maximum stress occurred was near the fastening hole 11 at the tip of the arm 4 in all cable rack support materials 1.

[0019] In any of the cable rack supports 1 shown in Figures 3A to 3E, the maximum stress was 156.0 N / mm 2 The result is as follows. The Z-shaped cross section of the arm 4 improves strength and allows the arm to be longer than arms with conventional U-shaped or gate-shaped cross sections. For this reason, the thickness and size of the members for the base plate 2 are the same for all rack widths up to a specified width, with a limit of 600 mm for a rack width (arm 4 length L = 700 mm), and the thickness and size excluding the length of the members for the arm 4 are also the same, so that the customer can be provided with the desired cable rack support material 1 simply by modifying the length of the members for the arm 4 according to the rack width of the cable rack 20 to be mounted.

[0020] Furthermore, the base plate 2 can be shared for cable racks 20 up to a specified rack width (600 mm). This has the advantage that it is not necessary to design facilities according to rack width, such as by setting a larger area of ​​upper and lower wall surface required for installation for cable rack support materials corresponding to larger rack widths and setting a smaller area of ​​upper and lower wall surface required for installation for cable rack support materials corresponding to smaller rack widths. In other words, it becomes possible to design facilities so that the area of ​​upper and lower wall surface required for installation of the base plate 2 is common regardless of the rack width.

[0021] Cable racks are often installed at high locations in facilities such as factories. One task for updating such equipment is to check the rack width. While this is typically done using a magnifying glass from below, it can often be difficult, so scaffolding or other tools are often installed to check the rack from a closer distance. Figure 3F shows an example of an installed cable rack support member 1 according to this embodiment. The cable rack support member 1 is perforated with indicator holes 12, the number of which varies depending on the rack width. Because dust falling within the facility slides down the sloped portion 7 and is less likely to accumulate, the indicator holes 12 perforated in the sloped portion 7 are less likely to become clogged with dust. Furthermore, because the indicator holes 12 are perforated in the sloped portion 7, they can be easily observed from below, avoiding the oblique view of the lower top plate 5. Therefore, in this embodiment, even when updating equipment long after installation, the rack width can be observed by checking the number of indicator holes 12 from below using a magnifying glass.

[0022] Furthermore, through-holes 10 are also provided on the horizontal surface of the top panel 5 located on the lower side. It has been experienced that heavy dust accumulation occurs on the horizontal surface during equipment renewal periods, and there is a high possibility that the through-holes 10 are blocked by dust and become invisible. Therefore, it is difficult to line up the through-holes 10 to correspond to the rack width and use them as display holes 12.

[0023] [Embodiment 2] Tests were also conducted on a cable rack support material in which the specifications of each component of the cable rack support material 1 of embodiment 1 were changed, with the base plate 2 being made of a 6 mm thick iron plate (steel plate) with a width w2 of 100 mm and a height h1 of 120 mm, and the arm 4 being made of a 4.5 mm thick iron plate (steel plate) with a width w3 of 100 mm, h2 of 50 mm, and an inclination angle θ of 40°. This cable rack support material has the same configuration as the cable rack support material 1, with only the above-mentioned numerical values ​​being different, so it is not shown in the illustrations. Cable rack support material for rack width 600 mm L=700mm, Load capacity 238Kg / m, Maximum stress 139.9N / mm 2 Cable rack support material for rack width 500mm L=600mm, Load capacity 222Kg / m, Maximum stress 131.3N / mm 2 Cable rack support material for rack width 400 mm L=500mm, Load capacity 206Kg / m, Maximum stress 86.2N / mm 2 Cable rack support material for rack width 300 mm L=400mm, load capacity 60kg / m, maximum stress 25.6N / mm 2 Cable rack support material for rack width 200 mm L=300mm, load capacity 44kg / m, maximum stress 21.1N / mm 2 As with the cable rack support material 1 of embodiment 1, the maximum stress generated in the cable rack support material of embodiment 2 is 156.0 N / mm 2 As a result, the length of the arm can be increased. Therefore, by simply modifying the length of the component for arm 4, the required cable rack support material can be provided to the customer without changing the use of other components. [Explanation of symbols]

[0024] 1 Cable rack support 2 base plates 3 holes 4 Arm 5 Top plate 6 Vertical section 7 Slope 10 through holes 11 Stopper hole 12 display hole 20 Cable rack 21 Side rail 30 Vibration prevention bracket 31 Clamp 32 Bracket 33 Through hole 34 Hook 34 Washer 35 volts

Claims

1. a base plate fixed to a wall of the facility or to a vertical member attached to the wall; The arm is fixed to the surface of the base plate by welding at a right angle, and is provided with a pair of horizontal top plate portions, a pair of vertical portions, and a sloped portion inclined relative to the horizontal and having a fastening hole, the pair of vertical portions being on both sides of the sloped portion as the center, and the pair of top plate portions being on both sides of the pair of vertical portions, A cable rack support material characterized in that the stop holes are drilled for attaching metal fittings that prevent the cable rack mounted on the upper top plate from vibrating.

2. The cable rack support of claim 1, A cable rack support material characterized in that multiple display holes are arranged in a straight line along the length of the inclined portion of the arm, and the number of display holes indicates the rack width of the cable rack to be mounted.

3. The cable rack support of claim 1 or 2, A cable rack support material characterized in that the inclination angle of the inclined portion relative to the horizontal is within the range of 45° to 20°.

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