JP3186444U - Temporary scaffold - Google Patents

Abstract

Provided is a temporary scaffold that can be easily and quickly installed on an H-shaped steel.
A horizontal portion 2 placed on an upper surface 1a of an upper flange of an H-shaped steel 1 or I-shaped steel having an upper and lower flange 1A and a web 1B connecting the upper and lower flanges along the left-right width direction; A horizontal portion 4 that extends downward from one end and a horizontal support portion 4 that extends outward from the lower portion of the downward portion 3 in the left-right width direction and supports the scaffolding plate 8. At both ends, a clamp portion 6 is provided for clamping the upper flange in cooperation with the horizontal portion 2 by contacting the lower surface 1U of the upper flange. In addition, the lower portion of the downward portion may be provided with a stretchable stretch portion 7 that extends toward the web side and contacts the side surface 1b of the web.
[Selection] Figure 1

Description

  The present invention relates to a temporary scaffold that can be installed on an H-shaped steel used as a bridge pier for, for example, a railway or a road and can perform maintenance and inspection work.

  As described above, a temporary scaffold is installed on one lateral side in the horizontal direction of the H-shaped steel so that, for example, maintenance / inspection of railway tracks can be performed. In order to install the temporary scaffold, one using a scaffold clamp is an example. This scaffold clamp is configured to include a clamp part that sandwiches a flange of an H-shaped steel, and a steel pipe clamp part that clamps a steel pipe for placing the scaffold. And when installing a temporary scaffold, the fixing operation | work which clamps many scaffold clamps to H-shaped steel first, and fixes a scaffold clamp to H-shaped steel is performed. After this fixing work is completed, after performing the clamping work of clamping the steel pipe to the scaffolding clamp, the joining work of connecting and integrating the many clamped steel pipes is performed, and then the scaffolding plate is connected to the steel pipe. The work of placing the temporary scaffolding on the surface is completed (see, for example, Patent Document 1).

Utility Model Registration No. 3000733 (see FIG. 3)

  In Patent Document 1, there are three operations: a fixing operation for fixing the scaffolding clamp to the H-shaped steel, a clamping operation for clamping the steel pipe to the scaffolding clamp, and a connecting operation for connecting and integrating many clamped steel pipes. This has the disadvantage that it takes a lot of work time to install the temporary scaffold.

  Then, this invention is made | formed in view of this situation, and makes it a subject to provide the temporary scaffold which can be installed easily and rapidly.

  A temporary scaffold according to the present invention includes a horizontal portion placed on an upper surface of an upper flange of an H-shaped steel or an I-shaped steel having a vertical flange and a web connecting the vertical flange, and one end of the horizontal portion. A downwardly extending portion extending downward from the lower portion, and a horizontal support portion for extending and supporting the scaffolding plate extending from the lower portion of the downward portion to the left and right width direction, at both ends in the left and right width direction of the horizontal portion, It is characterized by comprising a clamp portion for holding the upper flange in cooperation with the horizontal portion by contacting the lower surface of the upper flange.

  According to the present invention, the horizontal portion is placed on the upper surface of the upper flange of the H-shaped steel or I-shaped steel so as to be along the left-right width direction, and then the clamp portion is clamped so that the upper flange is The temporary scaffold can be fixed to the upper flange of H-shaped steel or I-shaped steel. After the fixation, the scaffolding plate is placed on the horizontal support part and completed.

  Moreover, the temporary scaffold which concerns on this invention may be provided with the elastic | stretchable stretch part extended in the said web side and contact | abutting the side surface of this web in the lower part of the said downward part.

  According to such a configuration, it is possible to avoid the horizontal portion from being inclined downwardly toward the horizontal support portion side in the left-right width direction by extending the strut portion and contacting the side surface of the web.

  Moreover, the temporary scaffold which concerns on this invention may be provided with the bar-shaped handrail extended upwards in the left-right width direction outer end of the said horizontal support part.

  According to such a configuration, by providing the projecting bar-shaped handrail, it is possible to perform a stable walk by grasping the handrail when moving on the scaffolding board.

  As described above, according to the temporary scaffold according to the present invention, the temporary scaffold can be easily and quickly installed only by clamping the clamp portion.

The front view of the temporary scaffold of 1st Embodiment of this invention is shown. The top view of the temporary scaffold is shown. The perspective view of the temporary scaffold of 2nd Embodiment of this invention is shown.

  Hereinafter, a temporary scaffold according to the first embodiment of the present invention will be described with reference to the drawings. This temporary scaffold is installed on H-shaped steel used as a pier for railways and roads. Then, maintenance and inspection work on tracks and roads can be performed by the temporary scaffolds installed.

  In FIG. 1, the front view of the temporary scaffold F installed in the H-shaped steel 1 is shown. The temporary scaffolding F is installed so that a scaffolding plate 8 described later is placed and supported on one side of the H-shaped steel 1 in the left-right width direction. The height at which the scaffold plate 8 is placed and supported is set to be positioned below the upper end surface of the H-shaped steel 1.

  The H-shaped steel 1 has upper and lower flanges 1A and 1A (only the upper flange is shown in FIG. 1) and a web 1B that connects the upper and lower flanges 1A and 1A at the left and right width direction center portions. Here, although H-shaped steel 1 is shown, I-shaped steel may be used.

  The temporary scaffold F is made of aluminum, and includes a horizontal portion 2 placed on the upper surface 1a of the upper flange 1A of the H-shaped steel 1 so as to extend in the left-right width direction, and a downward portion 3 extending downward from one end of the horizontal portion 2. A horizontal support 4 for placing and supporting the scaffolding plate 8 extending from the lower part of the downward part 3 (the part slightly below the vertical center part of the downward part 3) in the left-right width direction, and the horizontal support A bar-shaped handrail 5 extending upward at the lateral width direction outer end of the portion 4 is provided, and the upper flange is cooperated with the horizontal portion 2 by contacting the lower surface of the upper flange at both lateral width direction ends of the horizontal portion 2. The clamp part 6 for clamping 1A from the up-down direction is provided. In FIG. 1, a triangular plate 9 for connection reinforcement is welded to an inner corner portion where the horizontal portion 2 and the downward portion 3 are connected. Further, a triangular plate 10 for reinforcing connection is also welded to a lower portion where the downward portion 3 and the horizontal support portion 4 are connected.

  Further, the lower portion of the downward portion 3 is provided with a stretchable stretch portion 7 that extends toward the web 1B and contacts the side surface 1b of the web 1B.

  The horizontal portion 2 is configured in a rectangular tube shape, and is configured to have a longer dimension than the left and right width dimension of the upper flange 1A. Further, one end of the horizontal portion 2 on the downward portion 3 side protrudes outward in the left-right width direction of the upper flange 1 </ b> A and is cut obliquely. On the other hand, the downward portion 3 is also formed in a rectangular tube shape having the same diameter, and the upper end of the downward portion 3 is cut obliquely. And it connects by welding in the state which faced the cut ends of these horizontal parts 2 and downward parts 3.

  The horizontal support portion 4 is configured in a rectangular tube shape having the same diameter as the horizontal portion 2 and the downward portion 3, and its one end surface 4 a abuts against the lateral width direction outer side surface 3 a of the lower portion of the downward portion 3. In the contact state, both 4 and 3 are connected by welding.

  The handrail 5 is formed of a cylindrical round pipe. And the lower end surface 5a of the handrail 5 is contact | abutted to the upper surface 4a of the left-right width direction outer end of the horizontal support part 4, and the handrail 5 is fixed to the horizontal support part 4 by welding in the contact state.

  The clamp portions 6 are provided at both ends in the longitudinal direction of the horizontal portion 2. Each clamp portion 6 includes a square ring-shaped movable portion 6A externally fitted to the horizontal portion 2, an extension portion 6B extending downward from the lower surface of the movable portion 6A, and the extension portion. A clamp body 6C composed of a screw shaft screwed into a screw hole (not shown) formed in 6B, and a rotation operation handle 6D provided at the lower end of the clamp body 6C for rotating the clamp body 6C. I have. In addition, the free end of the horizontal part 2 is provided with a flange 2F for preventing the movable part 6A from coming off by contact. At the upper end of the clamp body 6C, a contact portion 6E that contacts the lower surface 1U of the upper flange 1A is provided.

  The projecting portion 7 is screwed into a screw shaft 7A inserted through a hole (not shown) formed so as to penetrate the lower end portion of the downward portion 3 in the left-right width direction, and a portion exposed from the hole of the screw shaft 7A. A pair of nuts 7B, 7B, and an abutting portion 7C attached to the end of the screw shaft 7A on the web 1B side and abutting against the side surface 1b of the web 1B are provided.

  When the temporary scaffold F configured as described above is installed, first, the horizontal portion 2 of the temporary scaffold F is placed on the upper surface 1a of the upper flange 1A of the H-shaped steel 1 so as to be along the left-right width direction. In this state, by rotating the handle 6D of each clamp portion 6 by an artificial operation force, the clamp body 6C is screwed toward the upper flange 1A. By this screwing, the abutting portion 6E of the clamp body 6C abuts on the lower surface 1U of the upper flange 1A, and the upper flange 1A is vertically moved by the horizontal portion 2 and the abutting portions 6E, 6E of the pair of left and right clamp bodies 6C, 6C. It is sandwiched from the direction. Thus, the temporary scaffold F is fixed to the upper flange 1A. Next, by rotating the pair of nuts 7B, 7B, the screw shaft 7A is screwed toward the web 1B. By this screwing, the contact portion 7C of the screw shaft 7A contacts the side surface 1b of the web 1B, and the installation of the temporary scaffold F is completed. When the abutting portion 7C abuts on the side surface 1b of the web 1B, the horizontal portion is in an inclined posture (the posture in which the horizontal portion 2 is lowered to the right in FIG. 1) in the horizontal width direction toward the horizontal support portion side. Can be avoided.

  As shown in FIG. 2, a plurality of temporary scaffolds F (three in FIG. 2) are installed at a predetermined interval in the front-rear direction, and a scaffold plate 8 is spanned between the installed temporary scaffolds F and F. Finish the work. Here, a plurality of temporary scaffolds F are installed, and the scaffolding plate 8 is spanned between the temporary scaffolds F, F installed, but the scaffolding plate 8 is fixed to one temporary scaffolding F. May be.

  In addition, the temporary scaffold based on this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the summary of this invention.

  In the above embodiment, the temporary scaffolding F is made of aluminum for the purpose of reducing the weight, but it may be made of other various metal materials, or any material other than metal materials as long as it is excellent in strength. It may be.

  Moreover, in the said embodiment, although the handrail 5 was comprised from the round pipe, you may comprise from a square pipe and the length and shape of the handrail 5 can be changed freely. In some cases, the handrail 5 may be omitted.

  Moreover, in the said embodiment, although the temporary scaffold F is provided with the tension part 7, the temporary scaffold F without the tension part 7 may be sufficient.

  In the above embodiment, the handle 6D for rotating operation for rotating the clamp body 6C is disposed below the horizontal portion 2, but the handle 6D for rotating operation is arranged in the horizontal portion as shown in FIG. It may be arranged above 2 to improve operability. Specifically, each clamp portion 6 is movably engaged with the horizontal portion 2, a movable portion 61 </ b> A, a pedestal 61 </ b> B fixed to the upper surface in the left-right width direction of the movable portion 61 </ b> A, and the pedestal 61 </ b> B. A screw shaft 61C that is freely supported, a handle 61D for rotation operation that is attached to the upper end of the screw shaft 61C so as to rotate the screw shaft 61C, one end is screwed to the screw shaft 61C, and And a horizontal arm portion 61E that moves up and down by the rotation of the screw shaft 61C, and a clamp body 61F that is connected to the other end of the horizontal arm portion 61E so as to move up and down in conjunction with the up and down movement of the horizontal arm portion 61E. ing. A cover member 61G for covering the handle 61D is further attached to the horizontal arm portion 61E so that the handle 61D is not rotated unexpectedly by contact with another object when the handle 61D is not rotated. Yes. FIG. 3 shows a state where the left cover member 61G covers the handle 61D, and shows a state where the right cover member 61G is detached from the handle 61D so that the handle 61D can be rotated. The clamp main body 61F is formed in a substantially L shape, and is guided horizontally by a pair of upper and lower guide portions 61H, 61H fixed to the movable portion 61A by welding, and horizontally from the lower end of the vertical portion 611. And a horizontal portion 612 extending in the direction. By rotating the handle 61D of the clamp portion 6 configured in this way clockwise or counterclockwise, the horizontal arm portion 61E and the clamp body 61F can be moved upward or downward. Accordingly, the upper flange 1A can be clamped or released from the vertical direction by the horizontal portion 2 and the clamp body 61F.

  DESCRIPTION OF SYMBOLS 1 ... H-shaped steel, 1A ... Up-and-down flange (upper flange), 1B ... Web, 1U ... Lower surface, 1a ... Upper surface, 1b ... Side surface, 2 ... Horizontal part, 2F ... Flange, 3 ... Downward part, 3a ... Out of left-right width direction side. 4 ... horizontal support part, 4a ... upper surface, 5 ... handrail, 5a ... lower end surface, 6 ... clamp part, 6A ... movable part, 6B ... extension part, 6C ... clamp body, 6D ... handle, 6E ... contact part, 7: Protruding portion, 7A: Screw shaft, 7B ... Nut, 7C ... Abutting portion, 8 ... Scaffold plate, 9, 10 ... Triangular plate, 61A ... Movable portion, 61B ... Base, 61C ... Screw shaft, 61D ... Handle, 61E ... Horizontal arm part, 61F ... Clamp body, 61G ... Cover member, 61H ... Guide part, 611 ... Vertical part, 612 ... Horizontal part, F ... Temporary scaffolding

Claims (3)

  A horizontal part placed on the upper surface of the upper flange of the H-shaped steel or I-shaped steel having a web connecting the upper and lower flanges and the upper and lower flanges along the left-right width direction; and a downwardly extending part extending downward from one end of the horizontal part; A horizontal support for extending and supporting the scaffolding plate from the lower portion of the downward portion in the left-right width direction, and abutting the lower surface of the upper flange at both ends in the left-right width direction of the horizontal portion A temporary scaffold comprising a clamp portion for clamping the upper flange in cooperation with the horizontal portion.   The temporary scaffold according to claim 1, further comprising a stretchable stretch portion that extends toward the web and abuts against a side surface of the web at a lower portion of the downward portion.   The temporary scaffold according to claim 1 or 2, further comprising a bar-shaped handrail extending upward at an outer side end in the left-right width direction of the horizontal support portion.

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