Protection panel

Abstract

To provide a protection panel used as scaffolding during an inspection capable of easily opening and closing.SOLUTION: A protection panel 100 for protecting a lower part of a bridge BR includes: a lower panel 10 arranged along the lower end of a support M provided in the lower part of the bridge BR; and a side panel 20 placed upright on the outside of the support M in the width direction D2 of the bridge BR and installed rotatably with respect to the support M. An opening / closing member for opening and closing the side panel 20 and a restricting member for restricting the opening degree of the side panel 20 are connected to the lower part of the side panel 20.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a protective panel.

Background Art

[0002] In order to facilitate the regular inspection of bridge structures, permanent scaffolds may be installed. In Patent Document 1, a structure is disclosed in which the lower surface panel for protecting the lower part of the bridge structure is used as a scaffold to facilitate the inspection of the lower part of the bridge structure, or the side panel is inclined (deployed) to facilitate access to the side part of the bridge structure.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Regarding the structure in which the protective panel for protecting the bridge structure is deployed to be used as a scaffold, the locations where this structure is provided are narrow places, dark places, or both. For this reason, there is a problem that the work load becomes high if the deployment work of the protective panel is complicated or the operator has to take an unnatural posture during deployment.

[0005] The present invention has been made in view of the above circumstances, and an object thereof is to provide a protective panel that can be used as a scaffold during inspection and that can easily perform opening and closing operations.

Means for Solving the Problems

[0006] In order to solve the above problems, the present invention proposes the following means. The protection panel according to the present invention is a protection panel for protecting the lower part of a bridge, and includes a bottom panel disposed along the lower part at the lower end of a support member provided at the lower part of the bridge, and a side panel disposed in an upright state on the outer side in the width direction of the bridge with respect to the support member and rotatably installed with respect to the support member. A lower part of the side panel is connected to an opening / closing member for opening and closing the side panel and a limiting member for limiting the opening degree of the side panel.

[0007] According to this invention, a lower part of the side panel is connected to an opening / closing member for opening and closing the side panel and a limiting member for limiting the opening degree of the side panel. Thereby, the side panel can be easily opened and closed.

[0008] Further, the opening / closing member and the limiting member may be the same member.

[0009] According to this invention, the opening / closing member and the limiting member are the same member. Thereby, the structure can be further simplified.

[0010] Further, the opening / closing member may be disposed at the eye height of an operator passing through the bottom panel.

[0011] According to this invention, the opening / closing member is disposed at the eye height of an operator passing through the bottom panel. Thereby, when the side panel is opened and closed, it is possible to prevent the operator from taking an unnatural posture. Therefore, the work can be made safer and more efficient.

[0012] Further, a first joining member is provided on the support member, a second joining member is provided on the side panel, and the first joining member and the second joining member may be joined when the side panel is stored.

[0013] According to the present invention, the first joining member and the second joining member are joined when the side panel is stored. As a result, the side panel in the stored state is fixed to the support member. Therefore, it is possible to prevent the side panel in the stored state from unexpectedly unfolding or from rotating in the storage direction more than necessary.

Effect of the Invention

[0014] According to the present invention, it is possible to provide a protection panel that can be used as a scaffold during inspection and that can facilitate the opening and closing operations.

Brief Description of the Drawings

[0015]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Embodiments for Carrying Out the Invention

[0016] Hereinafter, with reference to the drawings, a protection panel 100 according to an embodiment of the present invention will be described. The protection panel 100 is provided to protect the lower part of the bridge BR from a corrosive environment or the like. In addition, by having the following structure, it also functions as a scaffold when inspecting the bridge BR. Here, the bridge BR has a passage part T, a wall railing F, a support member M, and a girder member S.

[0017] The passage part T is a part where vehicles and pedestrians pass. In the present embodiment, the lower part of the bridge BR specifically refers to the lower surface of the passage part T. The parapet F is provided on the side surface of the passage T in the bridge BR. This prevents vehicles and pedestrians passing through the passage T from falling. In the present embodiment, the side surface of the bridge BR particularly refers to the outer surface of the parapet F, that is, the surface facing the operator O shown in FIG. 1.

[0018] The support member M is provided at the lower part of the bridge BR and supports the bottom panel 10 and the side panel 20 described later. The support member M has a horizontal support member M1 and a vertical support member M2. The horizontal support member M1 is horizontally provided at the lower part of the bridge BR. One end of the horizontal support member M1 is attached to the girder S of the bridge BR, and the other end is attached to the vertical support member M2. The vertical support member M2 is vertically arranged at the lower part of the bridge BR by the horizontal support member M1. The vertical support member M2 holds the bottom panel 10. Also, the vertical support member M2 rotatably holds the side panel 20.

[0019] Next, the configuration of the protection panel 100 will be described. In the following, when explaining each configuration of the protection panel 100, as shown in FIG. 1, the direction from vertically above to below the bridge BR is the vertical direction D1, the direction from the side facing the operator O to the side facing the passage T with the parapet F as a reference is the width direction D2 (direction perpendicular to the bridge axis), and the direction orthogonal to both the vertical direction D1 and the width direction D2, which is the traveling direction of vehicles or pedestrians passing through the passage T, etc., may be referred to as the longitudinal direction D3 (bridge axis direction).

[0020] The protection panel 100 is held by the support member M provided at the lower part of the bridge BR as described above and protects the lower part of the bridge BR. As shown in FIG. 1, the protection panel 100 has a bottom panel 10, a side panel 20, a handrail portion 30, a cable 40, and a second cable 50.

[0021] The lower panel 10 is arranged along the lower part of the bridge BR at the lower end of the vertical support member M2. One end of the lower panel 10 in the width direction D2 is attached to the girder member S, and the other end is attached to the lower end of the vertical support member M2. The lower panel 10 is, for example, a flat plate in a rectangular or square shape, and each side is arranged so as to be parallel to either the width direction D2 or the longitudinal direction D3. When the operator O moves inside the protection panel 100, the operator moves by walking on the lower panel 10.

[0022] The side panel 20 is, for example, a flat plate in a rectangular or square shape, and two of its sides are arranged parallel to the longitudinal direction D3, and the other two sides are arranged parallel to the plane composed of the vertical direction D1 and the width direction D2. The side panel 20 is installed rotatably with respect to the support member M. Specifically, the lower end of the side panel 20 is installed rotatably by a rotating shaft M2s provided on the vertical support member M2. Thereby, the side panel 20 is arranged with respect to the vertical support member M2 in the following two states.

[0023] That is, first, as shown in FIG. 2, the side orthogonal to the side arranged parallel to the longitudinal direction D3 is arranged parallel to the vertical direction D1. That is, the side panel 20 is arranged in a state of standing outside the width direction D2 of the bridge BR with respect to the support member M. Hereinafter, this state is referred to as the storage state. Alternatively, as shown in FIG. 6, the side orthogonal to the side arranged parallel to the longitudinal direction D3 of the side panel 20 is arranged inclined with respect to the vertical direction D1. Hereinafter, this state is referred to as the deployed state.

[0024] Note that in the following, when the side panel 20 rotates, the direction of rotation when changing from the stored state to the deployed state is referred to as the first direction R1, and the direction of rotation when changing from the deployed state to the stored state may be referred to as the second direction R2. Further, the angle of the side panel 20 with respect to the vertical direction D1 when changing from the deployed state to the stored state is referred to as the opening degree A1. The opening degree A1 is assumed to be minimum when the side panel 20 is in the stored state and maximum when in the deployed state. In the present embodiment, the opening degree A1 is maximum when the side panel 20 is inclined at 45° with respect to the vertical direction D1.

[0025] When the side panel 20 is in the stored state, the side panel 20 serves to protect the lower part of the bridge BR. When the side panel 20 is in the deployed state, as shown in FIG. 1, it serves as a scaffold when the operator O inspects the side of the bridge BR. For this reason, steps 20s are provided on the inner surface of the side panel 20, that is, the side facing the girder S of the side panel 20. The steps 20s may be provided only one on the inner surface of the side panel 20 or a plurality of them may be provided. The steps 20s are provided such that when the side panel 20 is in the deployed state, its upper surface is parallel to the width direction D2. Thereby, the ease of movement when the operator O uses the side panel 20 as a scaffold is ensured.

[0026] As described above, the side panel 20 serves two roles by being in the stored state or the deployed state. In the present embodiment, the switching between the stored state and the deployed state of the side panel 20, that is, the opening and closing of the side panel 20, is performed manually. For this reason, a lever 21 that functions as an opening and closing member for opening and closing the side panel 20 is provided at the lower part of the side panel 20.

[0027] The lever 21 is provided at the end of the side panel 20 in the longitudinal direction D3. The lever 21 is arranged at the eye level height of the operator O passing through the lower panel 10. In the present embodiment, the eye level height is a height of 50 cm or more and 2 m or less upward from the lower panel 10. Further, the lever 21 is arranged so as not to interfere with a cable 40 described later. Specifically, the lever 21 is located below the cable 40.

[0028] A rotation axis M2s is disposed on a part of the lever 21. Further, a lever fixing portion 21f is provided on a part of the lever 21 other than the portion where the rotation axis M2s is disposed. The lever fixing portion 21f is a portion that is joined to a fixing portion M2f provided on the vertical support member M2 by a bolt B when the side panel 20 is in the deployed state, as shown in FIG. 1. Thereby, it has a function of holding the side panel 20 in the deployed state.

[0029] When the lever fixing portion 21f and the fixing portion M2f are in contact with each other as shown in FIG. 1, further rotation of the side panel 20 in the first direction R1 is restricted. That is, the lever 21 also functions as a restricting member that restricts the opening degree A1 of the side panel 20. In other words, in the present embodiment, the opening / closing member and the restricting member are the same member. Hereinafter, the restriction that the side panel 20 is restricted from rotating in the first direction R1 by the lever 21 as the restricting member is referred to as the restricting member functioning.

[0030] In this way, the side panel 20 in the deployed state is fixed by joining the lever fixing portion 21f provided on the lever 21 to the fixing portion M2f of the vertical support member M2 with a bolt B. On the other hand, the side panel 20 in the stored state is fixed as follows. That is, a first joining member J1 is provided on the vertical support member M2. Further, a second joining member J2 is provided on the side panel 20. The first joining member J1 and the second joining member J2 are provided with bolt holes corresponding to each other. As shown in FIG. 2, the first joining member J1 and the second joining member J2 are joined by a bolt B when the side panel 20 is in the stored state. In this way, the side panel 20 in the stored state is fixed. The first joining member J1 and the second joining member J2 may be provided on both sides in the longitudinal direction D3 of the protection panel 100, or may be provided on only one side. Thereby, it prevents the side panel 20 in the stored state from unexpectedly deploying.

[0031] When the first joining member J1 and the second joining member J2 are in contact with each other as shown in FIG. 2, further rotation of the side panel 20 in the second direction R2 is restricted. Thereby, the side panel 20 is prevented from rotating in the second direction R2 more than necessary. The first joining member J1 and the second joining member J2 are installed at positions that do not interfere with the cable 40. For example, the first joining member J1 provided on the vertical support member M2 is arranged above the fixing portion M2f of the cable 40 on the vertical support member M2 to avoid interference with the cable 40. The second joining member J2 provided at the end of the side panel 20 in the longitudinal direction D3, for example, provides an intermediate hook f3 described later in the vicinity of the second joining member J2 to prevent the cable 40 from sagging toward the second joining member J2, thereby avoiding interference with the cable 40.

[0032] The handrail portion 30 is a fence-like member provided along the longitudinal direction D3. Specifically, it is formed by combining a rod parallel to the longitudinal direction D3 and a rod located in the plane formed by the vertical direction D1 and the width direction D2. Hereinafter, the rod parallel to the longitudinal direction D3 is referred to as a horizontal rod, and the rod located in the plane formed by the vertical direction D1 and the width direction D2 is referred to as a vertical rod. The handrail portion 30 is provided to prevent the operator O from falling when the operator O rides on the deployed side panel 20 for inspection work. The handrail portion 30 may serve as a backrest during work, or a lifeline may be attached to the handrail portion 30 for use.

[0033] The handrail portion 30 is rotatably arranged with respect to the side panel 20. Specifically, one end of the vertical rod is rotatably connected to the upper end of the side panel 20 in the vertical direction D1 via a handrail rotation shaft 30r. As shown in FIG. 2, the handrail portion 30 is in a state along the side panel 20 when the side panel 20 is stored. When the side panel 20 is deployed, the handrail portion 30 is in a state separated from the side panel 20 as shown in FIG. 6.

[0034] Hereinafter, in this embodiment, the angle formed by the vertical bar of the handrail portion 30 and the side panel 20 is referred to as the opening angle A2. As shown in FIG. 2, the opening angle A2 is minimized when the side panel 20 and the vertical bar are warped. Hereinafter, this state is referred to as the stored state. As shown in FIG. 6, when the side panel 20 is in the deployed state and the side panel 20 and the vertical bar are farthest apart, the opening angle A2 is maximized. Hereinafter, this state is referred to as the deployed state. In this embodiment, the maximum opening angle A2 is 135°.

[0035] The cable 40 is provided so as to pass through the side panel 20. In other words, the cable 40 is arranged along the end of the side panel 20 in the longitudinal direction D3. As shown in FIG. 1, one end of the cable 40 is fixed to the vertical support member M2. Specifically, it is fixed to the first hook f1 attached to the vertical support member M2. The other end of the cable 40 is fixed to the handrail portion 30. Specifically, it is fixed to the second hook f2 provided on the handrail portion 30.

[0036] The cable 40 is arranged along the side panel 20 by the following method between one end and the other end. That is, as shown in FIG. 1, the wire passes through the intermediate hook f3 provided near the rotation axis M2s of the side panel 20. Further, it passes along the outer periphery of the handrail rotation axis 30r and is fixed to the second hook f2. Thereby, the cable 40 is provided so as to pass through the side panel 20. The cable 40 pulls the handrail portion 30 to rotate in the first direction R1, which is the direction of increasing the opening angle A2 of the handrail portion 30, as the opening A1 of the side panel 20 increases. Specific embodiments will be described later.

[0037] The second cable 50 has one end fixed to the upper end of the vertical support member M2 and the other end connected to the upper end of the vertical bar of the handrail portion 30. The second cable 50 serves to prevent the operator O from falling from the end in the longitudinal direction D3 of the side panel 20 when the side panel 20 is in the deployed state and the operator O is working while standing on the step 20s. Also, when storing the side panel 20, pulling the middle portion of the second cable 50 downward causes the handrail portion 30 to rotate in the direction of being stored. Thus, the second cable 50 may be used to store the handrail portion 30.

[0038] (Regarding the deployment and storage of the side panel 20 and the handrail portion 30) Next, with reference to FIGS. 2 to 6, the deployment and storage of the side panel 20 and the handrail portion 30 will be described. When deploying the side panel 20, the operator O is standing on the lower surface panel 10. As shown in FIG. 2, when the side panel 20 is stored, the first joining member J1 and the second joining member J2 are fixed by the bolt B. From this state, first, remove this bolt B. Next, rotate the side panel 20 in the first direction R1 by pushing up the lever 21, which is an opening / closing member, from below. Then, as shown in FIGS. 3 and 4, the side panel 20 rotates in a direction inclined with respect to the vertical direction D1 and completes the deployment in the state of FIG. 5. After the deployment of the side panel 20 is completed, fix the lever fixing portion 21f of the lever 21, which is a restricting member, and the fixing portion M2f of the vertical support member M2 with the bolt B. Thereby, the deployment of the side panel 20 is completed. After the side panel 20 is deployed, move from the lower surface panel 10 to the step 20s of the side panel 20 and perform an inspection operation.

[0039] As shown in Fig. 2, when the side panel 20 is in the stored state, the handrail 30 is also in the stored state. In the present embodiment, by operating the lever 21 which is an opening / closing member, the handrail 30 automatically changes. Specifically, when the lever 21 is operated to deploy the side panel 20, the handrail 30 automatically changes the opening angle A2 according to the opening degree A1 of the side panel 20. Here, as described above, as the opening degree A1 of the side panel 20 increases, the cable 40 pulls the handrail 30 in the first direction R1 which is the direction of increasing the opening angle A2 of the handrail 30 so as to rotate it. That is, in the present embodiment, the automatic change of the handrail 30 is ensured by the cable 40.

[0040] As shown in Fig. 2, when the side panel 20 is in the stored state, the cable 40 between the first hook f1 and the intermediate hook f3 is slack and no tension is generated. As shown in Fig. 3, when the side panel 20 is rotated in the first direction R1 and deployed, as the distance between the first hook f1 and the intermediate hook f3 increases, the slack of the cable 40 disappears and tension is generated in the cable 40. When the side panel 20 is further deployed in the first direction R1, the distance between the first hook f1 and the intermediate hook f3 becomes even larger. As a result, as shown in Fig. 4, the cable 40 pulls the second hook f2 via the intermediate hook f3 and the handrail rotation shaft 30r. Thereby, the handrail 30 rotates in the direction of increasing the opening angle A2.

[0041] As shown in Fig. 5, when the deployment of the side panel 20 is completed, the automatic change of the handrail 30 is also completed. More specifically, the deployment which is the automatic change of the handrail 30 is completed before the lever 21 functions as a restricting member. The opening angle A2 of the handrail 30 at this time is about 90°. Thereafter, as shown in Fig. 6, the operator O manually rotates the handrail 30 further in the first direction R1 to complete the deployment of the handrail 30. At this time, in order to prevent the handrail 30 from unexpectedly rotating in the storage direction during the operation, it is preferable to fix the rotation of the handrail rotation shaft 30r with the eyebolt EB.

[0042] When storing the side panel 20 and the handrail 30 in the deployed state, first remove the eye bolt EB, and pull the middle part of the second cable 50 downward to rotate the handrail 30 in the storage direction. Then, remove the bolt B that fixes the lever fixing part 21f and the fixing part M2f, rotate the lever 21 in the second direction R2, and store the side panel 20. When the side panel 20 is in the stored state, fix the first joining member J1 and the second joining member J2 with the bolt B. By doing the above, the protection panel 100 is used for the inspection work of the bridge BR.

[0043] As described above, according to the protection panel 100 according to the present embodiment, an opening / closing member for opening and closing the side panel 20 and a restricting member for restricting the opening degree A1 of the side panel 20 are connected to the lower part of the side panel 20. Thereby, the opening and closing of the side panel 20 can be easily performed.

[0044] Also, the opening / closing member and the restricting member are the same member. Thereby, the structure can be further simplified.

[0045] Also, the opening / closing member is arranged at the eye height of the operator passing through the bottom panel 10. Thereby, when opening and closing the side panel 20, it is possible to prevent the operator from taking an unnatural posture. Therefore, the work can be made safer and more efficient.

[0046] Also, when the side panel 20 is stored, it is joined by a joining member. Thereby, it is possible to prevent the side panel 20 in the stored state from unexpectedly deploying, and to prevent the side panel 20 from moving in the storage direction more than necessary.

[0047] Note that 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. For example, a telescoping mechanism may be provided in the handrail 30. Thereby, the handrail 30 may be telescoped according to the opening degree A1 of the side panel 20. Also, although the automatic change of the handrail portion 30 has been described as being ensured by the cable 40, it is not limited to this. For example, the opening degree A1 of the side panel 20 may be measured by providing a rotation angle sensor on the rotation axis, and the handrail portion 30 may be rotated by providing a servo motor on the handrail rotation axis 30r. Also, the side panel 20 may be deployed until it becomes parallel to the width direction D2. The opening angle A2 of the handrail portion 30 may be deployed until it becomes 135° or more.

[0048] In addition, within the scope not departing from the gist of the present invention, it is possible to appropriately replace the components in the above-described embodiment with well-known components, and the above-described modified examples may also be appropriately combined.

Explanation of Reference Numerals

[0049] 10 Bottom panel 20 Side panel 30 Handrail portion 100 Protection panel A1 Opening degree BR Bridge D2 Width direction J1 First joining member J2 Second joining member M Support member O Operator

Claims

1. A protective panel for protecting the lower part of a bridge, comprising: a bottom panel disposed along the lower part at the lower end of a support member provided on the lower part of the bridge; a side panel disposed in an upright state outside the bridge width direction with respect to the support member and rotatably installed with respect to the support member; and having at the lower part of the side panel, an opening / closing member for opening and closing the side panel, a limiting member for limiting the opening degree of the side panel, are connected, the limiting member limits the opening degree of the side panel together with a fixing portion provided on the support member, the opening / closing member and the limiting member are the same member, protective panel.

2. The protective panel according to claim 1, wherein the opening / closing member is disposed at the eye height of an operator passing through the bottom panel. The protective panel according to claim 1.

3. A first joining member is provided on the support member, a second joining member is provided on the side panel, the first joining member and the second joining member are joined when the side panel is stored, The protective panel according to claim 1 or 2.

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