Scaffolding

Abstract

To provide a work scaffolding that can improve its strength.SOLUTION: Provided is a work scaffolding 100 installed on a concrete or mortar crest A including a plurality of stages of work scaffolding units 10A to 10C each including a plurality of front supports 11 spaced apart in the left-right direction and supported by the crest A, a plurality of rear supports 12 spaced apart the same as the front supports 11 and longer than the front supports 11, a front beam member 13 connecting the front supports 11 to each other, a rear beam member 14 connecting the rear supports to each other, front and rear members 15 connecting the front supports 11 to the rear supports 12, a joist member 16 whose middle part is supported by the front beam member 13 and whose rear part is supported by the rear beam member 14 and whose front end part is supported by the crest A via a stress transfer member 20, and a work floor member 17 laid on the joist member 16. The rear supports 12 of the work scaffolding units 10A, 10B on the second or higher level are supported by the joist members 16 of the work scaffolding units 10B, 10C on the next lower level.SELECTED DRAWING: Figure 1

Description

Technical Field

[0006]

[0001] The present invention relates to a working platform, particularly a working platform installed along a slope surface.

Background Art

[0002] In some cases, the slope surface such as cutting or filling is protected by using a concrete or mortar slope frame formed by in-situ casting or precast. When working on such a slope frame, the work is carried out on a working platform constructed along the already formed slope frame.

[0003] For example, Patent Document 1 discloses a working platform including a plurality of front-side columns, a plurality of rear-side columns longer than the front-side columns, a front-side large pulling frame installed between the front-side columns, a rear-side large pulling frame installed between the rear-side columns, a plurality of joist frames installed and supported between the front-side large pulling frame and the rear-side large pulling frame, and a working floor laid on the joist frames.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in the working platform described in Patent Document 1 above, the front part of the joist frame is supported by the front-side large pulling frame installed between the front-side columns. Therefore, the distance between the working floor laid on the joist frame and the slope frame becomes longer than the length of the front-side columns. In such a case, it was very difficult to drive an anchor or a rock bolt into the slope frame using a placing machine arranged on the working floor from the viewpoint of the strength of the working platform.

[0006] In view of the above points, an object of the present invention is to provide a working platform capable of improving strength. [Means for solving the problem]

[0007] The present invention provides a work scaffolding that is installed on a concrete or mortar slope frame, and comprises a plurality of work scaffolding units, each of which includes a plurality of front support columns provided at intervals in the direction extending of the slope frame and supported by the slope frame, a plurality of rear support columns provided at the same intervals as the front support columns and longer than the front support columns, a front beam member connecting adjacent front support columns, a rear beam member connecting adjacent rear support columns, a front and rear member connecting adjacent front and rear support columns, a joist member whose middle portion is supported by the front beam member, whose rear portion is supported by the rear beam member, and whose front end is supported by the slope frame via a stress transmission member, and a work floor member laid on the joist member, wherein the rear support columns of the second and subsequent work scaffolding units are supported by the joist members of the work scaffolding unit one level below the work scaffolding unit.

[0008] According to the work scaffold of the present invention, the front end of the joist member on which the work floor member is laid is supported by the slope frame via a stress transmission member. Therefore, compared to the case where it is supported by a front support column as in Patent Document 1, the distance between the work floor member and the slope frame is shortened, making it possible to improve the strength of the work scaffold.

[0009] In the work scaffold of the present invention, the stress transmission member preferably consists of an L-shaped member, one of which is fixed to the slope frame, and a support member, which is fixed to the other plate-shaped portion of the L-shaped member and extends in the direction in which the slope frame extends, and the tip of the joist member is supported by the support member.

[0010] In this case, it becomes possible to easily construct a stress transfer member that can transmit the stress acting on the work platform member to the slope frame.

[0011] Furthermore, in the work scaffold of the present invention, for example, a clamp may be fixed to the other plate-like portion of the L-shaped member, and the support member may be gripped by the clamp.

[0012] Furthermore, in the work scaffold of the present invention, for example, the rear support column may be supported by a rectangular member that is horizontally extended across multiple joist members. [Brief explanation of the drawing]

[0013] [Figure 1] A schematic side view showing a work scaffolding according to an embodiment of the present invention. [Figure 2] A schematic enlarged side view showing the uppermost work scaffolding unit. [Figure 3] A schematic rear view showing the uppermost work scaffolding unit. [Modes for carrying out the invention]

[0014] A work platform 100 according to an embodiment of the present invention will be described with reference to the drawings. Note that the drawings are schematic diagrams for illustrating this embodiment, and the dimensions are simplified.

[0015] The work scaffolding 100 is constructed along the slope on which a concrete or mortar slope frame A is installed. The slope frame A is made of cast-in-place or precast concrete and has a grid-like projection where parts extending in the left-right direction (the direction in which the slope frame A extends, horizontally toward the slope frame A) and parts extending in the vertical direction (up and down) intersect. In this case, through holes B are formed in at least a portion of the intersecting parts of the projections, and anchors or rock bolts C are driven into the ground through these through holes B by a driving machine placed on the work scaffolding 100.

[0016] The work platform 100 is a multi-tiered, in this case three-tiered staircase, with each tier consisting of similarly configured work platform units 10A to 10C. The work platform 100 is constructed sequentially, one tier at a time, starting from the lowest work platform unit 10C.

[0017] Each workbench unit 10 includes a front support column 11, a rear support column 12, a front beam member 13, a rear beam member 14, a front and rear member 15, a joist member 16, a work floor member 17, and the like.

[0018] The front support column 11 is made of, for example, a round steel pipe and is supported by the formwork A at intervals in the left - right direction. Here, the front support column 11 is vertically installed via a jack base 11a on the horizontal plane formed in the formwork A.

[0019] The rear support column 12 is made of, for example, a round steel pipe, has the same number as the front support column 11, but is longer than the front support column 11. The rear support column 12 is provided at the same interval as the front support column 11 in the left - right direction.

[0020] Each rear support column 12 of the lowermost workbench unit 10C is vertically installed via a jack base 12a on the ground D behind the formwork A or the like.

[0021] Each rear support column 12 of the workbench units 10A and 10B other than the lowermost one is supported by the joist member 16 of the workbench units 10B and 10C one level below. These rear support columns 12 are supported by a U - shaped member 18 made of one or more, here two, angle steel pipes that are horizontally spanned and supported across a plurality of, here three, joist members 16. The rear support column 12 is vertically provided on the angle - shaped member 18 by fitting the opening of the U - shaped clamp with a downward opening at the bottom using a jack base 12a above two adjacent angle - shaped members 18. The rear support column 12 supports the joist member 16 in front of the location supported by the front support column 11 of the workbench units 10B and 10C one level below.

[0022] The front side beam member 13 is made of, for example, a round steel pipe and connects the front side columns 11 adjacent to each other in the left - right direction. Here, the front side beam member 13 connects the upper parts and the middle parts of the front side columns 11 respectively. The rear side beam member 14 connects the rear side columns 12 adjacent to each other in the left - right direction. The rear side beam member 14 is made of, for example, a truss structure combined with round steel pipes and connects the upper parts between the rear side columns 12 adjacent to each other in the left - right direction. The rear side beam member 14 is also made of, for example, a round steel pipe and connects the middle parts of the rear side columns 12 adjacent to each other in the left - right direction.

[0023] The front - rear member 15 is made of, for example, a round steel pipe and connects the front side column 11 and the rear side column 12 positioned in the front - rear direction. Here, the front - rear member 15 connects the upper parts and the middle parts of the front side column 11 and the rear side column 12 respectively. Also, the front - rear member 15 connects the upper part of the front side column 11 and the middle part of the rear side column 12 positioned in the front - rear direction.

[0024] The front side beam member 13, the rear side beam member 14, and the front - rear member 15 and the front side column 11 or the rear side column 12 may be connected, for example, in the same manner as described in the above Patent Document 1, but the connection method is not limited to this.

[0025] The joist member 16 has its middle part supported by the front side beam member 13 and its rear part supported by the rear side beam member 14. Further, the joist member 16 extends forward from the front side column 11, and its front end is supported by the legal frame A via the stress transmission member 20. The front end of the joist member 16 and the legal frame A are close to each other but not in contact.

[0026] The stress transmission member 20 is composed of an L - shaped member 21, a catch clamp 22 fixed to the L - shaped member 21, and a support member 23 gripped by the catch clamp 22.

[0027] The L-shaped member 21 is formed from a steel material such as an L-shaped steel beam, with an L-shaped cross-section extending in the left-right direction. One plate-shaped portion 21a of the L-shaped member 21 is fixed to the upper surface of the slope frame A by an anchor 24. A catch clamp 22 is fixed to the other plate-shaped portion 21b of the L-shaped member 21. This catch clamp 22 grips a support member 23, which extends in the left-right direction and is made of, for example, a round steel pipe.

[0028] Furthermore, the support member 23 and the lower part of the front support column 11 are connected by a reinforcing member 25, which is made of, for example, a round steel pipe. This connection method can be the same as the connection method using the front and rear members 15 described above.

[0029] The front portions of multiple joist members 16 are placed on the support member 23. As a result, the joist members 16 are supported by the slope frame A via the L-shaped member 21, the catch clamp 22, and the support member 23, i.e., the stress transmission member 20. Therefore, stress acting on the joist members 16 from above is transmitted to the slope frame A via the stress transmission member 20.

[0030] The work platform member 17 is laid across the top surface of multiple joist members 16. The work platform member 17 may be a metal plate such as perforated metal, or a wooden board such as cedar board. In the uppermost work scaffolding unit 10A, the work platform member 17 is laid across the top surface of all joist members 16. However, in the other work scaffolding units 10B and 10C, the work platform member 17 is laid only on the top surface of the joist members 16 located behind the joist members 16 supported by the rear support column 12.

[0031] Furthermore, the work scaffolding units 10A to 10C may be equipped with handrails, baseboards, etc. These can be configured similarly to those described in Patent Document 1, for example.

[0032] In the work scaffolding 100 described above, the front end of the joist member 16 on which the work floor member 17 is laid is supported by the slope frame A via the stress transmission member 20. Therefore, compared to the case where the front part is supported by a front support column as in Patent Document 1, the distance between the work floor member 17 and the slope frame A is shortened, making it possible to improve the strength of the work scaffolding 100. This also makes it possible to drive anchors and rock bolts into the slope frame A using a driving machine placed near the front end of the work floor member 17 of the uppermost work scaffolding unit 10A.

[0033] It should be noted that the present invention is not limited to the work platform 100 specifically described in the embodiments described above, and can be modified as appropriate within the scope of the claims. [Explanation of Symbols]

[0034] 10...Work scaffolding unit, 10A...Topmost work scaffolding unit, 10B...Middle work scaffolding unit, 10C...Bottommost work scaffolding unit, 11...Front support column, 11a...Jack base, 12...Rear support column, 12a...Jack base, 13...Front beam member, 14...Rear beam member, 15...Front and rear members, 16...Joist member, 17...Work floor member, 18...Angular member, 20...Stress transmission member, 21...L-shaped member, 21a...One plate-like part, 21b...The other plate-like part, 22...Catch clamp, 23...Support member, 24...Anchor, 25...Reinforcement member, 100...Work scaffolding, A...Slope frame, B...Through hole, C...Anchor, rock bolt, D...Ground.

Claims

1. A work platform installed on a concrete or mortar-framed slope, Multiple front support columns are provided at intervals in the direction in which the slope frame extends and are supported by the slope frame, Multiple rear support columns are provided at the same intervals as the aforementioned front support columns, and are longer than the aforementioned front support columns. A front beam member that connects adjacent front support columns, A rear beam member that connects adjacent rear support columns, Front and rear members connecting adjacent front support columns and rear support columns, A joist member whose intermediate portion is supported by the front beam member, whose rear portion is supported by the rear beam member, and whose front end is supported by the slope frame via a stress transmission member, The system has multiple levels of work scaffolding units, each equipped with a work platform member laid on the aforementioned joist member, A work scaffold characterized in that the rear support columns of the second and subsequent work scaffold units are supported by the joist members of the work scaffold unit one level below the work scaffold unit in question.

2. The stress transmission member comprises an L-shaped member, one of which is fixed to the slope frame, and a support member, which is fixed to the other plate-shaped portion of the L-shaped member and extends in the direction in which the slope frame extends. The work scaffolding according to claim 1, characterized in that the tip of the joist member is supported by the support member.

3. The work scaffold according to claim 2, characterized in that a clamp is fixed to the other plate-shaped portion of the L-shaped member, and the support member is gripped by the clamp.

4. The work scaffolding according to any one of claims 1 to 3, characterized in that the rear support column is supported by a rectangular member that is horizontally placed across multiple joist members.

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