Channel base

Abstract

To improve the fatigue strength at a channel base.SOLUTION: An installation frame 16 is interposed between a floor 12 and a panel 13, and includes a downward-opening member 21 and an upward-opening member 22. The downward-opening member 21 has a U-shaped cross section that opens downward, and the panel 13 is installed on a top plate 31. The upward-opening member 22 has a U-shaped cross section that opens upward, and a bottom plate 41 is installed on the floor 12 and is fitted and joined to the downward-opening member 21.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention is channel based. [Background technology]

[0002] A freestanding panel that houses electrical equipment and the like is installed on the floor via a channel base. For example, Patent Document 1 discloses a channel base frame structure in which the frame is U-shaped, opening downward, with one side panel bent outward to form an L-shape, with the L-shaped bottom panel attached to the floor and the panel attached to the U-shaped top panel. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2001-275212 Summary of the Invention [Problem to be solved by the invention]

[0004] When the deck vibrates due to external forces such as wind or earthquakes, the channel-based frame is subjected to a moment, which causes stress to concentrate at the L-shaped bend, potentially leading to fatigue. The object of the present invention is to improve fatigue strength at the channel base. [Means for solving the problem]

[0005] A channel base according to one aspect of the present invention includes an installation frame interposed between a floor and a panel. The installation frame includes a downward-opening member and an upward-opening member. The downward-opening member has a U-shaped cross section that opens downward, and the panel is installed on the top plate. The upward-opening member has a U-shaped cross section that opens upward, and the bottom plate is installed on the floor and is fitted and joined to the downward-opening member. [Effects of the Invention]

[0006] According to the present invention, by fitting the upward-opening member into the downward-opening member, the installation frame can have a closed cross section at least at the point where it is attached to the floor. Moreover, since the distance from the point where the downward-opening member attaches to the panel to the point where the upward-opening member attaches to the floor can be shortened, the moment arm when the panel sways can be reduced. This reduces stress concentration and improves the fatigue strength of the installation frame. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 10 is a diagram showing an example of installation of a channel base. [Figure 2] FIG. 1 illustrates a channel base. [Figure 3] FIG. [Figure 4] FIG. [Figure 5] FIG. [Figure 6] FIG. 10 is a diagram illustrating a concatenated frame. [Figure 7] FIG. 10 is a diagram illustrating a first modified example. [Figure 8] FIG. 1 illustrates a channel base. [Figure 9] FIG. [Figure 10] FIG. [Figure 11] FIG. [Figure 12] FIG. 10 is a diagram illustrating a concatenated frame. DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the drawings are schematic and may differ from the actual product. Furthermore, the following embodiments exemplify devices and methods for embodying the technical concept of the present invention, and are not intended to limit the configuration to those described below. In other words, the technical concept of the present invention can be modified in various ways within the technical scope described in the claims.

[0009] First Embodiment "composition" In the following description, the three mutually orthogonal directions are referred to as the width direction, the depth direction, and the up-down direction. A plane along the width direction and the depth direction is considered to be horizontal. FIG. 1 is a diagram showing an example of installation of a channel base 11. As shown in FIG. Here, an example of installation of the channel base 11 is shown as viewed from one side in the width direction, one side in the depth direction, and from above in the vertical direction. The channel base 11 is interposed between the floor 12 and the panel 13, and forms a foundation for installing the panel 13. The channel base 11 has width and depth dimensions that match the panel 13, with the width direction being the longitudinal direction and the depth direction being the lateral direction.

[0010] FIG. 2 is a diagram showing the channel base 11. As shown in FIG. (a) in the figure shows the channel base 11 as viewed from one side in the width direction, one side in the depth direction, and from above in the vertical direction. (b) in the figure shows the channel base 11 as viewed from the other side in the width direction, one side in the depth direction, and from below in the vertical direction. The channel base 11 comprises a pair of installation frames 16 and a pair of connecting frames 17. The pair of installation frames 16 extend in the depth direction and are arranged parallel to each other and spaced apart in the width direction. The pair of connecting frames 17 extend in the width direction and are arranged parallel to each other and spaced apart in the depth direction. The channel base 11 is a square-shaped frame body formed by connecting the ends of the pair of installation frames 16 and the pair of connecting frames 17.

[0011] FIG. 3 is a diagram showing the installation frame 16. As shown in FIG. FIG. 1A shows the end of the installation frame 16 as viewed from the outside in the width direction, the outside in the depth direction, and from above in the vertical direction. FIG. 1B shows the end of the installation frame 16 as viewed from the outside in the width direction, the outside in the depth direction, and from below in the vertical direction. FIG. 1C shows a cross section of the end of the installation frame 16 along the width direction and the vertical direction as viewed from the outside in the depth direction. The installation frame 16 includes a downward-opening member 21, an upward-opening member 22, and a nut 23. The downward-opening member 21 and the upward-opening member 22, as well as the downward-opening member 21 and the nut 23, are joined by welding. The downward-opening member 21 is a main frame on which the panel 13 is installed, and the upward-opening member 22 is a subframe joined to the downward-opening member 21 and installed on the floor 12. The nut 23 is joined to the downward-opening member 21 and is a fastening part for installing the panel 13 to the downward-opening member 21.

[0012] FIG. 4 is a view showing the downward-opening member 21. As shown in FIG. (a) in the figure shows the end of the downward-opening member 21 as seen from the outside in the width direction, the outside in the depth direction, and from above in the vertical direction. (b) in the figure shows the end of the downward-opening member 21 as seen from the outside in the width direction, the outside in the depth direction, and from below in the vertical direction. (c) in the figure shows the downward-opening member 21 as seen from the outside in the depth direction. The downward-opening member 21 is formed by bending a single steel plate of uniform thickness, and has a U-shaped or C-shaped cross section that opens downward, and includes a top plate 31 and a pair of side plates 32.

[0013] The top plate 31 is a flat plate extending in the depth direction and aligned along the depth and width directions. A through hole 33 penetrating the top plate 31 in the thickness direction is formed on the outer side in the depth direction. The through hole 33 is a circular hole for installing the panel 13, and is smaller than the width across flats of the nut 23 and larger than the nominal diameter of the female thread portion of the nut 23. The nut 23 is arranged coaxially with the through hole 33 and is joined to the underside of the top plate 31 by welding. An opening 34 penetrating the top plate 31 in the thickness direction is formed on the inner side of the through hole 33 in the depth direction. The opening 34 is a circular hole for installing the upward-opening member 22 to the floor 12, and is smaller than the width dimension of the top plate 31 and larger than the through hole 33. The pair of side plates 32 are flat plates extending in the depth direction and aligned along the depth and vertical directions, and are formed by bending downward at right angles from both edges of the top plate 31 in the width direction. The inner dimension between the side plates 32, that is, the distance between the opposing surfaces, is defined as W1.

[0014] FIG. 5 is a view showing the upward opening member 22. As shown in FIG. (a) in the figure shows the upper-opening member 22 as viewed from the outside in the width direction, the outside in the depth direction, and from above in the vertical direction. (b) in the figure shows the upper-opening member 22 as viewed from the outside in the depth direction. The upper-opening member 22 is formed by bending a single steel plate of uniform thickness. Its cross-sectional shape is U-shaped or C-shaped, opening upward. It includes a bottom plate 41 and a pair of side plates 42. The bottom plate 41 is a flat plate extending along the depth and width directions. A through-hole 43 is formed in the center of the bottom plate 41 in the depth direction, penetrating the thickness direction. The through-hole 43 is a circular hole for installation on the floor 12. The pair of side plates 42 are flat plates extending along the depth and vertical directions, and are formed by bending both edges of the bottom plate 41 in the width direction upward at a right angle. The outer dimension of the side plates 42, i.e., the distance between the back surfaces, is designated W2.

[0015] The inner dimension W1 between the side plates 32 of the downward-opening member 21 corresponds to the outer dimension W2 between the side plates 42 of the upward-opening member 22. Therefore, the downward-opening member 21 and the upward-opening member 22 fit together with their opening directions facing each other. The upward-opening member 22 is disposed in a position in the depth direction in which the downward-opening member 21 extends, where the through-hole 43 of the upward-opening member 22 and the opening 34 of the downward-opening member 22 are approximately coaxial. The position of the upward-opening member 22 in the depth direction is the installation point to the floor 12. The downward-opening member 21 and the upward-opening member 22 are joined by welding the overlapping side plates 32 and 42. By joining one upward-opening member 22 to each side in the depth direction to one downward-opening member 21, the installation frame 16 is completed, as shown in FIG. 3 .

[0016] FIG. 6 is a diagram showing the connecting frame 17. As shown in FIG. FIG. 1A shows the end of the connecting frame 17 as viewed from the outside in the width direction, the outside in the depth direction, and from above in the vertical direction. FIG. 1B shows the connecting frame 17 as viewed from the outside in the width direction. The connecting frame 17 is formed by bending a single steel plate of uniform thickness, has an L-shaped cross section, and includes a top plate 51 and side plates 52. The top plate 51 is a flat plate that extends in the width direction and is aligned along the width and depth directions. The side plates 52 are flat plates that extend in the width direction and are aligned along the width and vertical directions, and are formed by bending the outer edge of the top plate 51 in the depth direction downward at a right angle. The side plates 52 protrude outward in the width direction beyond the top plate 51.

[0017] The mounting frame 16 and the connecting frame 17 are joined by welding at their ends perpendicular to each other. First, the side plate 52 of the connecting frame 17 is abutted against and welded to the outer end face in the depth direction of the downward-opening member 21. Then, the top plate 51 of the connecting frame 17 is abutted against and welded to the inner side plate 32 in the width direction of the downward-opening member 21. In this way, the channel base 11 is completed as shown in FIG. 2. The channel base 11 is installed to the floor 12 by fastening the through holes 43 of the upward-opening member 22 with bolts and nuts. Therefore, the through holes 43 serve as installation points to the floor 12. The bolts and nuts are fastened through the openings 34 of the downward-opening member 21. If the installation work can be performed through the openings 34, the position at which the upward-opening member 22 is joined may be adjusted relative to the extension direction of the downward-opening member 21. The panel 13 is installed to the nuts 23 through the through holes 33 of the channel base 11 with bolts and nuts. Therefore, the through holes 33 and the nuts 23 serve as installation points for the panel 13. In this way, installation of the panel 13 is completed as shown in FIG. 1 .

[0018] <<Action and Effect>> Next, the main effects of the first embodiment will be described. The channel base 11 includes an installation frame 16. The installation frame 16 is interposed between the floor 12 and the base plate 13 and includes a downward-opening member 21 and an upward-opening member 22. The downward-opening member 21 has a U-shaped cross section that opens downward, and the base plate 13 is installed on a top plate 31. The upward-opening member 22 has a U-shaped cross section that opens upward, and a bottom plate 41 is installed on the floor 12 and fitted and joined to the downward-opening member 21. By fitting the upward-opening member 22 to the downward-opening member 21 in this manner, the installation frame 16 can have a closed cross section at least at the point where it is installed on the floor 12. Furthermore, the distance from the point where the base plate 13 is installed on the downward-opening member 21 to the point where the upper-opening member 22 is installed on the floor 12 can be shortened, thereby reducing the moment arm when the base plate 13 sways. This reduces stress concentration and improves the fatigue strength of the installation frame 16.

[0019] The pair of side plates 42 of the upward-opening member 22 fit inside the pair of side plates 32 of the downward-opening member 21. This allows for the construction of an installation frame 16 that does not protrude in the width direction, resulting in excellent design. The downward-opening member 21 and the upward-opening member 22 are formed by joining the overlapping side plates 32 and 42. This increases the joining strength and makes the joining work easier. The upper opening member 22 is shorter in the extension direction than the lower opening member 21, and is provided only at the point where it is attached to the floor 12. This makes it possible to reduce the weight while increasing the rigidity only where necessary.

[0020] The installation point of the upper opening member 22 on the floor 12 can be adjusted along the extending direction of the lower opening member 21. This improves the degree of freedom in installation. A through hole 43 for installation on the floor 12 is formed in the bottom plate 41 of the upward-opening member 22. This makes it possible to easily install the member on the floor 12. A through hole 33 for installing the panel 13 is formed in the top plate 31 of the downward-opening member 21. This allows the panel 13 to be easily installed. An opening 34 for installation work is formed in the top plate 31 of the downward-opening member 21 when the upward-opening member 22 is installed on the floor 12. This makes it easy to install the upward-opening member 22 on the floor 12.

[0021] The channel base 11 comprises a mounting frame 16 and a connecting frame 17. The pair of mounting frames 16 are arranged in parallel. The pair of connecting frames 17 are arranged in parallel and perpendicular to the mounting frames 16. The channel base 11 is a square-shaped frame body formed by connecting the ends of the pair of mounting frames 16 and the pair of connecting frames 17. In this way, a robust channel base 11 can be constructed simply by combining four frames. The channel base 11 has a longitudinal direction and a lateral direction. The pair of mounting frames 16 extend in the lateral direction. The panel 13 is prone to shaking in the lateral direction. Therefore, by arranging the mounting frames 16, which have higher fatigue strength than the connecting frames 17, in the lateral direction, it is possible to increase the effectiveness against shaking of the panel 13.

[0022] Next, a comparative example will be described. Here, we will explain a comparative example of a structure in which the unit is U-shaped, with one side panel bent outward to form an L-shape, the L-shaped bottom panel attached to the floor, and the panel attached to the U-shaped top panel. With this type of structure, when the panel sways due to external forces such as wind or an earthquake, the channel-based frame is subjected to a moment, causing stress to concentrate at the L-shaped bend, potentially resulting in fatigue. While it is possible to increase the strength by increasing the thickness of the panel or the dimensions of the bottom panel, this would increase the weight and potentially make transportation and installation difficult.

[0023] Variation 1 The height of the side plate 32 of the downward-opening member 21 and the height of the side plate 42 of the upward-opening member 22 affect the strength of the installation frame 16. Therefore, the higher the required strength, the greater the height of the side plate 32 and the side plate 42 may be changed. FIG. 7 is a diagram illustrating the first modification. The strength of the downward-opening member 21 and the upward-opening member 22 increases as the height of the side plates 32 and 42 increases. Therefore, the higher the required strength, the greater the height of the side plates 32 and 42. This allows the channel base 11 to be configured to meet specific needs.

[0024] Other Modifications In the first embodiment, a configuration has been described in which the width dimension of the upper opening member 22 is smaller than the width dimension of the lower opening member 21, and the upper opening member 22 is fitted inside the lower opening member 21. However, this is not limited to this. That is, a configuration may be adopted in which the width dimension of the upper opening member 22 is larger than the width dimension of the lower opening member 21, and the upper opening member 22 is fitted outside the lower opening member 21. In the first embodiment, the opening 34 of the downward-opening member 21 is a round hole, but this is not limited to this. That is, the opening 34 may be an elongated hole extending in the depth direction. This makes it possible to expand the adjustment range of the mounting point of the upward-opening member 22 in the extension direction of the downward-opening member 21. Furthermore, multiple openings 34 may be formed on one side of the downward-opening member 21. This makes it possible to expand the adjustment range of the mounting point of the upward-opening member 22.

[0025] Second Embodiment "composition" The second embodiment shows another aspect of the method of joining the downward-opening member 21 and the upward-opening member 22, and the other configurations are the same as those of the first embodiment described above, so the common configurations are given the same symbols and detailed explanations are omitted. FIG. 8 is a diagram showing the channel base 11. As shown in FIG. (a) in the figure shows the channel base 11 as viewed from one side in the width direction, one side in the depth direction, and from above in the vertical direction, while (b) in the figure shows the channel base 11 as viewed from the other side in the width direction, one side in the depth direction, and from below in the vertical direction.

[0026] FIG. 9 is a diagram showing the installation frame 16. As shown in FIG. (a) in the figure shows the end of the installation frame 16 as viewed from the outside in the width direction, the outside in the depth direction, and from above in the vertical direction. (b) in the figure shows the end of the installation frame 16 as viewed from the outside in the width direction, the inside in the depth direction, and from below in the vertical direction. (c) in the figure shows a cross section of the end of the installation frame 16 along the width direction and the up-down direction as viewed from inside in the depth direction. The downward-opening member 21 and the upward-opening member 22 are joined by fasteners (not shown). The fasteners are, for example, rivets, but may also be screws or bolts and nuts. The downward-opening member 21 and the nuts 23 are joined by welding.

[0027] FIG. 10 is a view showing the downward-opening member 21. As shown in FIG. (a) in the figure shows the end of the downward-opening member 21 as seen from the outside in the width direction, the outside in the depth direction, and from above in the vertical direction. (b) in the figure shows the end of the downward-opening member 21 as seen from the outside in the width direction, the inside in the depth direction, and from below in the vertical direction. (c) in the figure shows a cross section of the downward-opening member 21 along the width direction and the vertical direction as seen from the inside in the depth direction. The downward-opening member 21 is formed by bending a single steel plate of uniform thickness, and in addition to the top plate 31 and a pair of side plates 32, further includes an end plate 36, an end plate 37, and a top plate 38.

[0028] Each of the pair of side panels 32 has four through holes 35 formed along the depth direction, penetrating the thickness direction. The end panel 36 is a flat panel extending along the width and vertical directions, and is formed by bending downward at a right angle from the outer edge of the top panel 31 in the depth direction. Two through holes 35 are formed along the width direction in the end panel 36. The end panel 37 is a flat panel extending along the width and vertical directions, and is formed by bending downward at a right angle from the outer edge of the depth direction in the side panel 32 located on the inner side in the width direction. One through hole 35 is formed in the end panel 37, penetrating the thickness direction. The top panel 38 is a flat panel extending along the width and depth directions, and is formed by bending downward at a right angle from the upper edge of the end panel 37 in the depth direction. The top panel 38 is positioned downward by the thickness of the top panel 31. One through hole 35 is formed in the top panel 38, penetrating the thickness direction.

[0029] FIG. 11 is a view showing the upward opening member 22. As shown in FIG. (a) in the figure shows the upward-opening member 22 as viewed from the outside in the width direction, the outside in the depth direction, and from above in the vertical direction. (b) in the figure shows the upward-opening member 22 as viewed from the outside in the depth direction. Each of the pair of side plates 42 has four through holes 45 formed along the depth direction, penetrating through the thickness direction. The bottom-opening member 21 and top-opening member 22 are joined by fasteners to the overlapping side plates 32 and 42. Here, structural rivets capable of high shear, tensile, and high-pressure bonding are used, and the two are joined by crimping and tightly adhering them using a dedicated fastening tool. It is preferable to use a countersunk head rivet by countersunk processing on the side plate 32 located on the outside in the width direction, or a round head rivet by spot-boring processing. This prevents the rivet head from protruding outward.

[0030] FIG. 12 is a diagram showing the connecting frame 17. As shown in FIG. (a) in the figure shows the end of the connecting frame 17 as seen from the outside in the width direction, the outside in the depth direction, and from above in the up-down direction. (b) in the figure shows the connecting frame 17 as seen from the outside in the width direction. One through-hole 55 is formed in the top plate 51, penetrating in the thickness direction. Three through-holes 55 are formed in the side plate 52, penetrating in the thickness direction, along the width direction. The mounting frame 16 and connecting frame 17 are joined by fasteners, with the end plates 36 and 37 overlapping the side plates 52, and the top plates 38 and 51 overlapping each other. Here, structural rivets with high shear, tensile, and high pressure are used, and the two plates are joined by caulking with a dedicated fastening tool to firmly secure them together. It is preferable to use countersunk head rivets by countersunk processing the top plate 51 and side plates 52, or countersunk head rivets by spot boring. This prevents the rivet heads from protruding outward.

[0031] <<Action and Effect>> Next, the main effects of the second embodiment will be described. The downward-opening member 21 and the upward-opening member 22 are joined together via fasteners, which eliminates the need for welding, thereby improving workability and suppressing increases in costs. The installation frame 16 is formed with end plates 36 and 37 at both ends facing outward in the short side direction, thereby increasing the joint area with the connecting frame 17 and increasing the joint strength. The connecting frame 17 is joined by overlapping its ends with the end plates 36 and 37. This increases the joining strength and makes the joining work easier. Other effects brought about by the common configuration are the same as those of the first embodiment described above.

[0032] Although the present invention has been described above with reference to a limited number of embodiments, the scope of the invention is not limited thereto, and modifications of the embodiments based on the above disclosure will be obvious to those skilled in the art. [Explanation of symbols]

[0033] 11...Channel base, 12...Floor, 13...Panel, 16...Installation frame, 17...Connecting frame, 21...Downward opening member, 22...Upward opening member, 23...Nut, 31...Top plate, 32...Side plate, 33...Through hole, 34...Opening, 35...Through hole, 36...End plate, 37...End plate, 38...Top plate, 41...Bottom plate, 42...Side plate, 43...Through hole, 45...Through hole, 51...Top plate, 52...Side plate, 55...Through hole

Claims

1. An installation frame is provided to be interposed between the floor and the panel, The mounting frame includes: A downward-opening member having a U-shaped cross section that opens downward and on whose top plate the board is installed; A channel base characterized by having a cross-sectional shape that is U-shaped and opens upward, a bottom plate that is attached to the floor, and an upward-opening member that is fitted and joined to the downward-opening member.

2. The channel base according to claim 1 , wherein the upper opening member has a pair of side plates that fit inside the pair of side plates of the lower opening member.

3. The channel base according to claim 2 , wherein the side plates of the downward-opening member and the upward-opening member that overlap each other are joined together.

4. The channel base according to claim 3 , wherein the downward opening member and the upward opening member are joined together via a fastener.

5. The channel base according to claim 1, wherein the upper opening member is shorter in the extension direction than the lower opening member and is provided only at the point where the channel base is attached to the floor.

6. The channel base according to claim 1 , wherein the upper opening member is capable of adjusting an attachment point to the floor along an extension direction of the lower opening member.

7. The channel base according to claim 1, wherein the bottom plate of the upwardly opening member has a through hole formed therein for installation on the floor.

8. The channel base according to claim 1, wherein a through hole for installing the board is formed in the top plate of the downward-opening member.

9. 2. The channel base according to claim 1, wherein an opening for installation work is formed in the top plate of the downward-opening member when the upward-opening member is installed on the floor.

10. a pair of the installation frames arranged in parallel; a pair of connecting frames arranged parallel to each other and perpendicular to the installation frame; 2. The channel base according to claim 1, wherein the pair of installation frames and the pair of connecting frames are connected at their ends to form a square-shaped frame body.

11. There are longitudinal and lateral directions, The channel base according to claim 10, wherein the pair of mounting frames extend in a short direction.

12. The installation frame has end plates formed on both ends facing outward in the short side direction, The channel base according to claim 11, wherein the connecting frame is joined to the end plate by overlapping the end portion thereof.

13. 2. The channel base according to claim 1, wherein the height of each side plate of the downward-opening member and the upward-opening member increases as the required strength increases.

Images