Support structure for running body

Abstract

To prevent breakage of a fixed member in the support structure of a running body.SOLUTION: The support structure for the running body includes a first support member, a second support member, and fixing means. The first support member has a first through hole formed therein and supports the running body. The second support member has a second through hole formed therein and supports the first support member. The fixing means fixes the first support member and the second support member. The fixing means has a first fixing member and a second fixing member. The first fixing member is inserted into the first through hole and the second through hole. The second fixing member is connected to the first fixing member. The second fixing member is located on the opposite side of the first through hole with respect to the second through hole and has a portion facing the first support member in the direction in which the first through hole and the second through hole are aligned. The first support member and the first fixing member are spaced apart from each other in the direction in which the running body runs, and the first support member and the second fixing member are spaced apart from each other in the direction in which the first through hole and the second through hole are aligned.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The technology disclosed in this specification relates to a support structure for a running body. [Background technology]

[0002] Cranes are used to transport heavy loads and the like. The support structure for a crane includes a crane girder that supports the crane. The crane transports heavy loads and the like horizontally by traveling on the crane girder installed inside a building, for example. Conventionally, a crane bridge structure (crane support structure) has been disclosed that includes an additional beam (crane girder) that supports the crane, an existing girder that supports the additional beam, and a fixing means that fixes the additional beam and the existing girder. The fixing means includes a bolt (first fixing member) that is inserted into bolt holes formed in the additional beam and the existing girder, and a nut that is connected to the bolt (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2010-132415 Summary of the Invention [Problem to be solved by the invention]

[0004] In a crane support structure, when a crane travels on a crane girder, the crane girder bends. As a result, the first fixing member is subjected to shear stress in the direction in which the crane travels and tensile stress in a direction intersecting the direction in which the crane travels, which may cause the first fixing member to break. Note that this issue is not limited to support structures that support cranes, but is a common issue in general for support structures that support traveling bodies.

[0005] This specification discloses a technique that can solve the above-mentioned problems. [Means for solving the problem]

[0006] The technology disclosed in this specification can be realized, for example, in the following forms.

[0007] (1) A support structure for a running body disclosed in this specification includes a first support member, a second support member, and a fixing means. The first support member has a first through hole formed therein and supports the running body. The second support member has a second through hole formed therein and supports the first support member. The fixing means fixes the first support member and the second support member. The fixing means includes a first fixing member and a second fixing member. The first fixing member is inserted into the first through hole and the second through hole. The second fixing member is connected to the first fixing member. The second fixing member is located on the opposite side of the first through hole to the second through hole and has a portion facing the first support member in a direction in which the first through hole and the second through hole are aligned. The first support member and the first fixing member are spaced apart from each other in a direction in which the running body runs, and the first support member and the second fixing member are spaced apart from each other in a direction in which the first through hole and the second through hole are aligned.

[0008] According to this support structure for a running body, the first support member and the first fixing member are spaced apart from each other in the direction in which the running body travels, thereby suppressing shear stress occurring in the first fixing member. Also, because the first support member and the second fixing member are spaced apart from each other in the direction in which the first through-hole and the second through-hole are aligned, tensile stress occurring in the first fixing member is suppressed. Therefore, according to this support structure for a running body, breakage of the first fixing member can be suppressed.

[0009] (2) In the support structure for the traveling body, the first fixing member may be a bolt, and the second fixing member may be a nut that is screwed onto the bolt. With this configuration, breakage of the first fixing member can be suppressed.

[0010] (3) In the support structure for a traveling body described above, the second fixing member may be a hard lock nut. With this configuration, the second fixing member is a hard lock nut, so that the first support member and the second support member can be fixed more firmly.

[0011] (4) In the support structure for the traveling body, the fixing means may further include a spring washer disposed between the first support member and the second fixing member in the direction in which the first through hole and the second through hole are aligned. According to this configuration, since the spring washer is disposed between the first support member and the second fixing member, tensile stress generated in the first fixing member is effectively suppressed, and breakage of the first fixing member can be more effectively suppressed.

[0012] (5) In the support structure for the running body, the first through hole may be a loose hole extending in the running direction of the running body. With this configuration, since the first through hole is a loose hole extending in the running direction of the running body, shear stress generated in the first fixing member is effectively suppressed, and breakage of the first fixing member can be more effectively suppressed.

[0013] (6) In the support structure for a traveling body, the traveling body may be a crane, and the first support member may be a crane girder. According to this configuration, in the support structure for a crane, breakage of the first fixing member can be suppressed.

[0014] The technology disclosed in this specification can be realized in various forms, for example, in the form of a support structure for a running body, a manufacturing method for a support structure for a running body, and a support method for a running body. [Brief explanation of the drawings]

[0015] [Figure 1] An explanatory diagram showing the support structure of the running body [Figure 2] An explanatory diagram showing an enlarged view of a part of the support structure of the running body. [Figure 3] An explanatory diagram showing an enlarged view of a part of the support structure of the running body. [Figure 4]An explanatory diagram showing the periphery of the fixing means [Figure 5] Cross-sectional view of the support structure at position VV in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0016] A. Implementation: FIG. 1 is an explanatory diagram showing a support structure 10 for a running body 20. FIG. 1 shows the running body 20 and a support structure 10 for the running body 20 (hereinafter, sometimes simply referred to as the "support structure 10"). In FIG. 1 and the subsequent figures, mutually orthogonal X, Y, and Z axes are shown to identify directions. In FIG. 1 and the subsequent figures, the Z-axis direction is the vertical direction, the X-axis direction is the horizontal direction, and the Y-axis direction is the horizontal direction and perpendicular to the X-axis direction. The positive Z-axis direction is the upward direction, and the negative Z-axis direction is the downward direction. In this specification, members extending in the Z-axis direction do not need to extend strictly vertically and may have a certain inclination relative to the vertical direction. Similarly, members extending in the X-axis and Y-axis directions do not need to extend strictly horizontally and may have a certain inclination relative to the horizontal direction.

[0017] The traveling body 20 is a crane that transports heavy objects, for example, within a building such as a factory. The traveling body 20 includes a beam 22 and a hook 24. The beam 22 moves in the X-axis direction by traveling on rails 400, which will be described later. The hook 24 moves in the Y-axis direction by moving along the beam 22 upon receiving power from a hoist (not shown) or the like. The traveling body 20 includes the beam 22 and the hook 24, which allows for the horizontal movement of heavy objects, etc.

[0018] 2 and 3 are explanatory diagrams showing enlarged portions of the support structure 10 for the running body 20. The support structure 10 is a structural body that supports the running body 20. The support structure 10 is installed, for example, inside a building of a factory or the like. The support structure 10 includes a first support member 100, a second support member 200, fixing means 300, a rail 400, and a column 500.

[0019] The first support member 100 is a member extending in the X-axis direction. In this embodiment, the first support member 100 is a crane girder. The first support member 100 is, for example, an H-beam, an I-beam, or the like. The first support member 100 has a web 110, an upper flange 120, and a lower flange 130. The upper flange 120 of the first support member 100 is connected to the lower part of the rail 400. The first support member 100 supports the rail 400, thereby supporting the running body 20. A first through-hole 132 penetrating in the Z-axis direction is formed in the lower flange 130 of the first support member 100 (see FIG. 4).

[0020] The second support member 200 is a member extending in the X-axis direction. In this embodiment, the second support member 200 is a cantilever beam. The second support member 200 is, for example, an H-shaped steel or an I-shaped steel. The second support member 200 has a web 210, an upper flange 220, and a lower flange 230. The upper flange 220 of the second support member 200 is connected to the lower flange 130 of the first support member 100. The second support member 200 supports the first support member 100 below the first support member 100. As shown in FIG. 3, the second support member 200 supports the end of the first support member 100 in the X-axis direction. Also, as shown in FIG. 3, one second support member 200 supports two first support members 100. A second through-hole 222 penetrating in the Z-axis direction is formed in the upper flange 220 of the second support member 200 (see FIG. 4). The second through-hole 222 is positioned so as to be aligned with the first through-hole 132 in the Z-axis direction.

[0021] The fixing means 300 fixes the first support member 100 and the second support member 200. Details of the fixing means 300 will be described later.

[0022] Rail 400 is a member extending in the X-axis direction. Rail 400 is, for example, an H-beam, an I-beam, or the like. Rail 400 supports traveling body 20. Rail 400 is a running path for traveling body 20 in support structure 10. Traveling body 20 travels in the X-axis direction, for example, by rotating wheels (not shown) attached to both ends of beam 22 in the Y-axis direction on rail 400.

[0023] The pillar 500 is a pillar extending in the Z-axis direction. The pillar 500 is connected to both the upper flange 220 of the second support member 200 and the lower flange 230 of the second support member 200. The pillar 500 supports the second support member 200. The pillar 500 is connected to the upper flange 120 of the first support member 100. The pillar 500 supports the first support member 100.

[0024] 4 is an explanatory diagram showing the periphery of the fixing means 300. The fixing means 300 has a first fixing member 310, a second fixing member 320, and a spring washer 330.

[0025] The first fixing member 310 is a member having a portion extending in the Z-axis direction. In this embodiment, the first fixing member 310 is a bolt. The first fixing member 310 has a threaded portion 312 and a head portion 314. The threaded portion 312 of the first fixing member 310 is inserted into the first through hole 132 and the second through hole 222. The head portion 314 is a portion located on the opposite side of the second through hole 222 from the first through hole 132. The head portion 314 is a portion facing the upper flange 220 of the second support member 200 in the direction in which the first through hole 132 and the second through hole 222 are aligned.

[0026] The second fixing member 320 is a member connected to the first fixing member 310. In this embodiment, the second fixing member 320 is a nut that screws onto the first fixing member 310. The second fixing member 320 has a concave nut 321 and a convex nut 322. The convex nut 322 has a convex portion that protrudes toward the concave nut 321. The concave nut 321 has a concave portion that fits into the portion of the convex nut 322 that protrudes toward the concave nut 321. In other words, the second fixing member 320 is a hard lock nut. The second fixing member 320 is connected to the first fixing member 310 by screwing onto it. The second fixing member 320 is located on the opposite side of the first through hole 132 from the second through hole 222. The second fixing member 320 has an opposing portion 324 that is a portion that faces the lower flange 130 of the first supporting member 100 in the direction in which the first through-holes 132 and the second through-holes 222 are aligned.

[0027] The spring washer 330 is a spring washer and is disposed between the lower flange 130 of the first support member 100 and the opposing portion 324 of the second fixing member 320 in the direction in which the first through-hole 132 and the second through-hole 222 are aligned.

[0028] 4, the second fixing member 320, the spring washer 330, the first supporting member 100, the second supporting member 200, and the head 314 of the first fixing member 310 are connected to one another and arranged in this order in the Z-axis direction. The fixing means 300 fixes the first supporting member 100 and the second supporting member 200 with this structure.

[0029] As already described, the spring washer 330 is disposed between the lower flange 130 of the first support member 100 and the facing portion 324 of the second fixing member 320. Therefore, the lower flange 130 of the first support member 100 and the facing portion 324 of the second fixing member 320 are spaced apart from each other in the direction in which the first through-hole 132 and the second through-hole 222 are aligned (the Z-axis direction).

[0030] Figure 5 is a cross-sectional view of the support structure 10 at position VV in Figure 3. As shown in Figure 5, the first through-hole 132 of the first support member 100 is a loose hole extending in the direction in which the running body 20 runs (the X-axis direction). As a result, the first support member 100 and the threaded portion 312 of the first fixing member 310 are spaced apart from each other in the direction in which the running body 20 runs.

[0031] Hereinafter, the action of the fixing means 300 when the running body 20 runs on the rail 400 will be described. When the running body 20 runs on the rail 400, the first support member 100, which receives the load of the running body 20, bends. When the running body 20 is located near the center of the first support member 100 in the X-axis direction, for example, the first support member 100 bends, causing the center of the first support member 100 in the X-axis direction to deform downward. Furthermore, as the center of the first support member 100 in the X-axis direction deforms downward, the end of the first support member 100 in the X-axis direction deforms upward and toward the center of the first support member 100 in the X-axis direction. In the support structure 10 of this embodiment, the first support member 100 and the first fixing member 310 are spaced apart from each other in the X-axis direction. Therefore, the shear stress generated in the first fixing member 310 is suppressed compared to, for example, a configuration in which the first support member and the first fixing member are not spaced apart from each other in the X-axis direction. Furthermore, in the support structure 10 of this embodiment, the first support member 100 and the second fixing member 320 are spaced apart from each other in the Z-axis direction, and therefore the tensile stress generated in the first fixing member 310 is suppressed compared to, for example, a configuration in which the first support member and the second fixing member are not spaced apart from each other in the Z-axis direction.

[0032] As described above, the support structure 10 for the running body 20 of this embodiment includes a first support member 100, a second support member 200, and a fixing means 300. The first support member 100 has a first through hole 132 formed therein and supports the running body 20. The second support member 200 has a second through hole 222 formed therein and supports the first support member 100. The fixing means 300 fixes the first support member 100 and the second support member 200 together. The fixing means 300 includes a first fixing member 310 and a second fixing member 320. The first fixing member 310 is inserted through the first through hole 132 and the second through hole 222. The second fixing member 320 is connected to the first fixing member 310. The second fixing member 320 is located on the opposite side of the first through hole 132 from the second through hole 222, and has a portion facing the first support member 100 in the direction in which the first through hole 132 and the second through hole 222 are aligned. The first support member 100 and the first fixing member 310 are spaced apart from each other in the direction in which the running body 20 runs, and the first support member 100 and the second fixing member 320 are spaced apart from each other in the direction in which the first through hole 132 and the second through hole 222 are aligned.

[0033] According to the support structure 10 for the running body 20 of this embodiment, the first support member 100 and the first fixing member 310 are spaced apart from each other in the direction in which the running body 20 travels, thereby suppressing shear stress generated in the first fixing member 310. Furthermore, since the first support member 100 and the second fixing member 320 are spaced apart from each other in the direction in which the first through hole 132 and the second through hole 222 are aligned, tensile stress generated in the first fixing member 310 is suppressed. Therefore, according to the support structure 10 for the running body 20 of this embodiment, it is possible to suppress breakage of the first fixing member 310.

[0034] In the support structure 10 for the running body 20 of this embodiment, the first fixing member 310 is a bolt, and the second fixing member 320 is a nut that screws onto the bolt. According to the support structure 10 for the running body 20 of this embodiment, it is possible to prevent the first fixing member 310 from breaking.

[0035] Furthermore, in the support structure 10 for the running body 20 of this embodiment, the second fixing member 320 is a hard lock nut. According to the support structure 10 for the running body 20 of this embodiment, since the second fixing member 320 is a hard lock nut, the first support member 100 and the second support member 200 can be fixed more firmly.

[0036] Furthermore, in the support structure 10 for the running body 20 of this embodiment, the fixing means 300 further has a spring washer arranged between the first support member 100 and the second fixing member 320 in the direction in which the first through-hole 132 and the second through-hole 222 are aligned. According to the support structure 10 for the running body 20 of this embodiment, since the spring washer is arranged between the first support member 100 and the second fixing member 320, the tensile stress generated in the first fixing member 310 is effectively suppressed, and breakage of the first fixing member 310 can be more effectively suppressed.

[0037] Furthermore, in the support structure 10 for the running body 20 of this embodiment, the first through-hole 132 is a loose hole that extends in the running direction of the running body 20. According to the support structure 10 for the running body 20 of this embodiment, since the first through-hole 132 is a loose hole that extends in the running direction of the running body 20, the shear stress generated in the first fixing member 310 is effectively suppressed, and breakage of the first fixing member 310 can be more effectively suppressed.

[0038] In the support structure 10 for the traveling body 20 of this embodiment, the traveling body 20 is a crane, and the first support member 100 is a crane girder. According to the support structure 10 for the traveling body 20 of this embodiment, breakage of the first fixing member 310 can be suppressed in the support structure for the crane.

[0039] B. Variations: The technology disclosed in this specification is not limited to the above-described embodiments, and can be modified into various forms without departing from the spirit thereof, for example, the following modifications are also possible.

[0040] The support structure 10 of the above embodiment is merely an example, and various modifications are possible. For example, the shapes of the first support member and the second support member are not necessarily limited to those of the above embodiment.

[0041] In the support structure 10 of the above embodiment, the first support member 100 is a bolt and the second support member 200 is a nut, but the first support member does not necessarily have to be a bolt and the second support member does not necessarily have to be a nut. Also, in the above embodiment, the second support member 200 is a Hardlock nut, but the second support member may be a nut other than a Hardlock nut.

[0042] In the support structure 10 of the above embodiment, the fixing means 300 has the spring washer 330, but the fixing means does not necessarily have to have a spring washer. The first support member and the second fixing member may be spaced apart from each other in the direction in which the first through hole and the second through hole are aligned by a method other than having a spring washer.

[0043] In the support structure 10 of the above embodiment, the first through hole 132 is a loose hole, but the first through hole does not necessarily have to be a loose hole. The first support member and the first fixing member may be spaced apart from each other in the direction in which the traveling body travels by a method other than the first through hole being a loose hole.

[0044] Although the support structure 10 in the above embodiment is a support structure for a crane that supports a crane as a running body, the support structure is not limited to a support structure for a crane. For example, the support structure may be a support structure for a retractable roof that supports a retractable roof as a running body, or a support structure for a fork that supports the forks of a forklift as a running body. [Explanation of symbols]

[0045] 10: Support structure 20: Traveling body 22: Beam 24: Hook 100: First support member 110: Web 120: Upper flange 130: Lower flange 132: First through hole 200: Second support member 210: Web 220: Upper flange 222: Second through hole 230: Lower flange 300: Fixing means 310: First fixing member 312: Threaded portion 314: Head 320: Second fixing member 321: Concave nut 322: Convex nut 324: Opposing portion 330: Spring washer 400: Rail 500: Pillar

Claims

1. A support structure for a traveling body, a first support member having a first through hole formed therein and supporting the traveling body; a second support member having a second through hole formed therein and supporting the first support member; A fixing means for fixing the first support member and the second support member, a first fixing member inserted through the first through hole and the second through hole; a fixing means including a second fixing member connected to the first fixing member, the second fixing member being located on the opposite side of the first through hole from the second through hole, and having a portion facing the first support member in a direction in which the first through hole and the second through hole are aligned; Equipped with the first support member and the first fixed member are spaced apart from each other in the direction in which the traveling body travels, A support structure for a running body, wherein the first support member and the second fixing member are spaced apart from each other in a direction in which the first through hole and the second through hole are aligned.

2. The support structure for a traveling body according to claim 1, the first fixing member is a bolt, The support structure for a traveling body, wherein the second fixing member is a nut that is screwed onto the bolt.

3. The support structure for a traveling body according to claim 2, The support structure for a traveling body, wherein the second fixing member is a hard lock nut.

4. The support structure for a traveling body according to claim 1, The support structure for a running body, wherein the fixing means further has a spring washer arranged between the first support member and the second fixing member in the direction in which the first through hole and the second through hole are aligned.

5. The support structure for a traveling body according to claim 1, The support structure for a running body, wherein the first through hole is a loose hole extending in a direction in which the running body runs.

6. The support structure for a traveling body according to any one of claims 1 to 5, the traveling body is a crane, The support structure for a traveling body, wherein the first support member is a crane girder.

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