JP5600609B2 - Temporary scaffolding structure - Google Patents

Description

  The present invention relates to the structure of a temporary scaffold used for boiler inspection and repair.

  Conventionally, many multistage temporary scaffolds are used for various operations of buildings (for example, see Patent Documents 1 and 2).

JP 2001-254495 A JP 11-280251 A

  By the way, the temporary scaffold is divided into a plurality of elements in order to facilitate the transportation thereof, and these elements are assembled and used at the site so as to have a required height and width. However, since the installation of the temporary scaffold requires a large number of conveying steps and assembly steps, a configuration that can improve the conveying property and assembling property of each element is always desired. In other words, in the conventional structure in which each element is simply assembled by a hook structure, a clamp structure, etc., a large number of man-hours are required for carrying in / out of each element to / from the site and attachment / detachment work, and the ratio of the scaffold to the scaffolding work increases. It was.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to facilitate the transportation and assembly of scaffold components in a temporary scaffold structure used for various operations of a building, thereby reducing costs.

As a means for solving the above problems, the invention described in claim 1 is a temporary scaffold structure used for various operations of a building, and a pair of upper and lower horizontal frames spanned between a pair of adjacent vertical frames, and each of the horizontal A brace that is bridged between alternate ends of the frame, the end of each horizontal frame and the end of the brace are pivotally connected, and the retaining plate is prevented from coming off by the protrusion of the return plate And a locking pin that is detachable from the locking hole when the return plate is inserted, and the locking pin is provided at one end of each horizontal frame, and the locking pin is provided at the other end. A pair of upper and lower assembly horizontal frames of a planar scaffold assembly is formed by providing a plurality of holes and connecting a plurality of the respective horizontal frames .
The invention described in claim 2, as the locking pin at both ends of the front Symbol each set body horizontal frame is located at both ends of the horizontal frame that is located on one outermost side of said each set body horizontal frame The locking pin is provided.
The invention described in claim 3 is characterized in that each assembly horizontal frame is a handrail.
According to a fourth aspect of the present invention, in the brace connecting portion of each horizontal frame, one of the locking pin and the locking hole is provided, and both ends of the brace are provided in the connecting portion. A locking hole or a locking pin corresponding to the locking pin or the locking hole is provided.

According to the first aspect of the present invention, the pair of upper and lower horizontal frames are connected so as to be foldable via the braces provided in the temporary scaffolding, so that each of the horizontal frames and the braces can be handled integrally and foldable. It is possible to easily carry and assemble each horizontal frame and brace. In addition, the cost can be reduced by reducing the number of man-hours required for scaffolding work. Moreover, when connecting each horizontal frame in multiple numbers and forming each assembly horizontal frame, the edge parts of each horizontal frame can be easily connected and detached with a locking pin and a locking hole.
According to the invention described in claim 2, since the both end portions are both connected to the vertical frame by the locking pin of each Kumitai horizontal frame (handrail), a longitudinal difference in each pair body horizontal frame It can be lost. Furthermore, it is only necessary to provide each vertical frame with a locked means, and the configuration can be simplified.
According to the invention described in claim 4, each horizontal frame and the brace are connected by the locking pin and the locking hole, so that each horizontal frame and the brace can be easily attached and detached (easily disassembled). The degree of freedom of conveyance can be improved. Further, the cost can be further reduced by sharing the locking pin and the locking hole for connecting the brace with the locking pin and the locking hole for connecting each horizontal frame.

It is a front view of the suspension scaffold in embodiment of this invention. (A) is a front view of the assembly which consists of a pair of upper and lower horizontal frames and braces of the said suspension scaffold, (b) is the A section enlarged view of (a). It is a top view which shows the connection structure of the said horizontal frame.

Embodiments of the present invention will be described below with reference to the drawings.
A suspension scaffold (temporary scaffold) 1 shown in FIG. 1 is suspended, for example, on the inner side of an outer peripheral wall 2a of a boiler 2 to inspect and repair the wall surface.
A main beam 3 made of, for example, H-shaped steel is installed inside the upper end portion of the boiler 2 through a through hole 2b formed in the outer peripheral wall 2a, and the suspension scaffold 1 is suspended below the main beam 3.

  On the main beam 3, for example, a scaffolding beam 4 made of H-shaped steel smaller than the main beam 3 is fixed, and a wire 5 extending from a winch (not shown) provided in the scaffolding beam 4 is attached to one of the suspension scaffolds 1. The block portion (in this embodiment, the portion having four vertical frames 7 and 22) is suspended. Hereinafter, one block of the suspended scaffold 1 is referred to as a scaffold assembly 6.

  For example, the scaffold assembly 6 pre-assembles materials input from a manhole (not shown) in the lower end portion (in the hopper) of the boiler 2 by two pitches (two layers), and the pre-assembled portion 6a is By assembling the subsequent scaffolds (hereinafter referred to as the rear assembly portion 6b) one pitch at a time while being lifted, it is formed in a planar shape having a large number of pitches.

  Although detailed illustration is omitted, the scaffold assemblies 6 are arranged in a plurality along the inner side of the outer peripheral wall 2a of the boiler 2, and these are connected to each other so that the outer peripheral wall 2a of the boiler 2 is A suspension scaffold (temporary scaffold) 1 is formed throughout.

  The pre-assembled portion 6a of the scaffold assembly 6 mainly forms four vertical frames 7 made of an existing scaffold material made of a round steel pipe. Hereinafter, the vertical frames 7 may be referred to as first to fourth vertical frames 7a to 7d in order from the left side in the drawing. Each vertical frame 7 has a length corresponding to two pitches in the pre-assembled portion 6a.

  A pair of vertical frames 7 (first and fourth vertical frames 7a and 7d) positioned on the outermost side of the pre-assembled portion 6a are used as scaffolding beams via suspension fittings 8 each having an upper end portion composed of a connecting plate, a pin and the like. 4 is attached. A pair of vertical frames 7 (second and third vertical frames 7b and 7c) located inside the pre-assembled portion 6a are connected to each other via an upper end horizontal frame 9 extending between the upper ends. A connecting beam 11 is installed between the upper ends of the second and third vertical frames 7b and 7c, just above the upper end horizontal frame 9. The connecting beam 11 is attached to the scaffolding beam 4 via a pair of support fittings 12.

  The upper and lower intermediate portions of each vertical frame 7 are connected by an assembly horizontal frame 13. The assembly horizontal frame 13 includes three pieces which are respectively constructed between the first and second vertical frames 7a and 7b, between the second and third vertical frames 7b and 7c, and between the third and fourth vertical frames 7c and 7d. The horizontal frame 14. Each horizontal frame 14 is made of, for example, a round steel pipe, and both ends of the horizontal frame 14 are crushed into a flat plate shape to form a connecting portion with the upper and lower intermediate portions of each vertical frame 7.

  Between the upper and lower intermediate part of the first vertical frame 7a and the upper end part of the second vertical frame 7b, between the lower end part of the first vertical frame 7a and the upper and lower intermediate part of the second vertical frame 7b, Braces 15 are respectively constructed between the upper end portion and the upper and lower intermediate portion of the fourth vertical frame 7d, and between the upper and lower intermediate portion of the third vertical frame 7c and the lower end portion of the fourth vertical frame 7d.

  Each brace 15 is made of, for example, a round steel pipe, and forms a connecting portion with each vertical frame 7 by crushing both ends thereof into a flat plate shape. In the pre-assembled portion 6a, between the upper and lower intermediate part of the first vertical frame 7a and the upper end part of the second vertical frame 7b, and between the lower end part of the first vertical frame 7a and the upper and lower intermediate part of the second vertical frame 7b. In addition, a staircase 16 is installed as an elevating equipment between each pitch. A scaffold plate (not shown) is installed on the scaffold beam 4 and the assembly horizontal frame 13.

  A lower end portion of each vertical frame 7 is connected by a suspension beam 17 extending between the first and fourth vertical frames 7a and 7d. A rear assembly portion 6b of the scaffold assembly 6 is suspended below the suspension beam 17. A scaffolding plate (not shown) is also installed on the suspension beam 17.

  The rear assembly portion 6b mainly forms four vertical frames 21 made of a flat strip-shaped steel material (flat bar). The upper end of each vertical frame 21 is attached to the suspension beam 17 by a fastener such as a bolt and nut. Each vertical frame 21 has a length corresponding to one pitch in the rear assembly portion 6b, and each vertical frame 21 is used by being connected by a plurality of pitches.

  That is, the upper end portion of each vertical frame 21 connected below the lower end portion of each vertical frame 21 is attached by a fastener such as a bolt and nut. In this way, by connecting a plurality of the four vertical frames 21 in the vertical direction, four assembly vertical frames 22 extending in the vertical direction of the rear assembly portion 6b are formed. Hereinafter, the assembly vertical frames 22 may be referred to as first to fourth assembly vertical frames 22a to 22d in order from the left side in the drawing.

  The connecting portion between the vertical frames 21 in each assembly vertical frame 22 is connected by a horizontal frame (not shown). A scaffolding board (not shown) is installed on the horizontal frame.

  At an arbitrary pitch of the rear assembly portion 6b, a staircase as a lifting device is provided between the lower end portion of the vertical frame 21 of the second assembly vertical frame 22b and the upper end portion of the vertical frame 21 of the third assembly vertical frame 22c. 23 is installed. Further, there is a stairway 23 between the upper and lower intermediate portions of the vertical frame 21 of the third assembly vertical frame 22c at an arbitrary pitch and the upper and lower intermediate portions of the vertical frame 21 of the second assembly vertical frame 22b at a lower pitch. A main brace 24 is installed in parallel with the main brace 24.

  At an arbitrary pitch of the rear assembly portion 6b, the upper and lower intermediate portions of each vertical frame 21 are connected to each other via an upper handrail (upper assembly horizontal frame) 25, and a portion below the upper handrail 25 is a lower portion. They are connected to each other via a handrail 27 (lower assembly horizontal frame).

  The handrail 25 is installed between the first and second assembly vertical frames 22a and 22b, between the second and third assembly vertical frames 22b and 22c, and between the third and fourth assembly vertical frames 22c and 22d, respectively. 3 upper horizontal frames 26. Similarly, the lower handrail 27 is provided between the first and second assembly vertical frames 22a and 22b, between the second and third assembly vertical frames 22b and 22c, and between the third and fourth assembly vertical frames 22c and 22d. Are composed of three lower horizontal frames 28 respectively.

Hereinafter, each upper horizontal frame 26 is referred to as an upper first to third upper horizontal frame 26a to 26c in order from the left side in the figure, and each lower horizontal frame 28 is assigned to a lower first to lower third horizontal frame 28a to 28a in order from the left side in the figure. It may be 28c.
Each of the horizontal frames 26 and 28 is made of, for example, a round steel pipe, and both ends thereof are crushed into a flat plate shape to form a connecting portion with each vertical frame 21 (each assembly vertical frame 22).

  Referring to FIGS. 2 and 3 together, a locking pin 31 that can be engaged with a locking hole 32 formed in each vertical frame 22 is located at the right end of each horizontal frame 26, 28 in the drawing. Is fixed. On the other hand, at the left end of each horizontal frame 26, 28 in the drawing, each second horizontal frame 26b, 28b and each third horizontal frame 26c, 28c have the same locking holes as those formed in each vertical frame 22. 32 is formed, and in each of the first horizontal frames 26a and 28a, the same locking pin 31 as that fixed to the right end in the figure is fixed.

That is, only the first horizontal frames 26a and 28a are provided with locking pins 31 at both ends, the second horizontal frames 26b and 28b and the third horizontal frames 26c and 28c have the locking pins 31 at the right end and the left end. Are each provided with a locking hole 32.
On the other hand, each vertical frame 21 (each assembly vertical frame 22) includes only a locking hole 32. For convenience of illustration, only the upper horizontal frame 26 is shown in FIG. 3, but the lower horizontal frame 28 has the same configuration as described above.

  Referring to FIG. 3, the locking pin 31 includes, for example, a substantially cylindrical pin body 31 a that is a forged product, and a return plate 31 b made of a strip-shaped steel material that is swingably held in the pin body 31 a. The pin main body 31a has a spherical tip end, and a base end is fixed to the end of each horizontal frame 26, 28 by welding or fastening, respectively.

  A slit is formed on the distal end side of the pin main body 31a, and the return plate 31b protrudes and retracts with respect to the slit. One end side of the return plate 31b is pivotally supported on the distal end side of the pin main body 31a, and the other end side can project a predetermined amount from the proximal end side of the pin main body 31a to the outer peripheral side.

  A biasing force is applied to the return plate 31b so that the other end protrudes toward the outer peripheral side of the pin body 31a. When the locking pin 31 is inserted into the locking hole 32, the urging force causes the return plate 31 b to protrude beyond the locking hole 32 and protrude from the locking hole 32 of the locking pin 31. It will prevent slipping. On the other hand, the locking pin 31 can be attached to and detached from the locking hole 32 by immersing the return plate 31b in the slit against the urging force.

  When the right end of the horizontal frame 26a (or 26b) located on the left side is connected to the assembly vertical frame 22b (or 22c), the right side of the assembly vertical frame 22b (or 22c) is connected between them. The right end of the horizontal frame 26b (or 26c) located in the direction is sandwiched. As a result, the three horizontal frames 26a and 26b (or 26b and 26c) and the assembly vertical frame 22b (or 22c) are integrally connected. This also applies to the lower horizontal frame 28.

  1 and 2, at the end of the upper second horizontal frame 26b, in addition to the horizontal frames 26a, 26b (or 26b, 26c) and the assembly vertical frame 22b (or 22c), the main brace 24 is used. The four parties including are connected together.

  Here, between each first horizontal frame 26a, 28a and between each third horizontal frame 26c, 28c, between the right end of the upper first horizontal frame 26a and the left end of the lower first horizontal frame 28a. A brace 33 is installed between the right end of the upper third horizontal frame 26c and the left end of the lower third horizontal frame 28c.

  The brace 33 is made of, for example, a round steel pipe and is connected to an upper connecting portion 34 projecting below the right end portion of the upper first and upper third horizontal frames 26a and 26c by crushing both ends thereof into a flat plate shape. And a connecting portion with the lower connecting portion 35 protruding above the left end portions of the lower first and lower third horizontal frames 28a, 28c.

  Both end portions of the brace 33 are rotatably connected to the connecting portions 34 and 35 through connecting pins 36 arranged so as to be orthogonal to the upper and lower horizontal frames 26 and 28 and the brace 33, respectively. The connecting pin 36 and the locking pin 31 are provided so as to be parallel to each other.

  As a result, the upper and lower horizontal frames 26 and 28 and the brace 33 can be easily folded and unfolded as necessary. The upper and lower horizontal frames 26 and 28 and the brace 33 can be folded into a rod shape when stored or transported. When assembling the suspension scaffold 1, the upper and lower horizontal frames 26 and 28 and the brace 33 can be developed in a Z shape and can be assembled to the assembly vertical frame 22 at the same time. At this time, by using the locking pins 31 and the locking holes 32, the vertical horizontal frames 26 and 28 can be easily attached to and detached from the assembly vertical frame 22.

  As described above, the temporary scaffold structure in the above embodiment is a pair of upper and lower horizontal bridges spanned between a pair of adjacent vertical frames 21 in the structure of a suspended scaffold 1 used for various operations of a building such as a boiler 2. Frames 26 and 28, and braces 33 spanned between the alternate ends of the horizontal frames 26 and 28, and the ends of the horizontal frames 26 and 28 and the ends of the braces 33 rotate. It is possible to be connected.

  According to this configuration, the pair of upper and lower horizontal frames 26 and 28 are foldably connected via the brace 33 provided on the suspension scaffold 1, so that the three of the horizontal frames 26 and 28 and the brace 33 can be folded together. The horizontal frames 26 and 28 and the brace 33 can be easily transported and assembled. In addition, the cost can be reduced by reducing the number of man-hours required for scaffolding work.

  Further, the temporary scaffold structure is provided with a locking pin 31 that is prevented from coming off from the locking hole 32 by the protrusion of the return plate 31b, and that is detachable from the locking hole 32 by the immersion of the return plate 31b. The locking pins 31 are provided at one end of each of the horizontal frames 26 and 28, and the locking holes 32 are provided at the other end, and a plurality of the horizontal frames 26 and 28 are connected to each other. Thus, a pair of upper and lower assembly horizontal frames (upper and lower handrails 25 and 27) of the scaffold assembly 6 having a planar shape are formed, and the locking pins 31 are positioned at both ends of each assembly horizontal frame. The locking pins 31 are provided at both ends of the first horizontal frame 26a located on the outermost side of one of the assembly horizontal frames.

  According to this configuration, when a plurality of horizontal frames 26 and 28 are connected to form each assembly horizontal frame (handrails 25 and 27), the end portions of the horizontal frames 26 and 28 are connected to each other with the locking pin 31 and The locking holes 32 can be easily attached and detached. Moreover, since both ends of each assembly horizontal frame (handrails 25 and 27) are both connected to each vertical frame 21 by the locking pin 31, differences in the longitudinal direction of each assembly horizontal frame can be eliminated. Furthermore, it is only necessary to provide each of the vertical frames 21 with a locking hole 32, and the configuration can be simplified.

  In the above-described embodiment, the connecting pin 36 that connects the connecting portions 34 and 35 of the horizontal frames 26 and 28 and both ends of the brace 33 is formed of a stepped bolt or the like. , 28 may be provided with one of the locking pin 31 and the locking hole 32 and the other end of the brace 33 with the other of the locking pin 31 and the locking hole 32.

  In this case, the horizontal frames 26 and 28 and the brace 33 can be easily attached / detached (easily disassembled), and the degree of freedom of storage and transportation can be improved. Further, the cost can be further reduced by sharing the locking pin 31 and the locking hole 32 for connecting the brace 33 with the locking pin 31 and the locking hole 32 for connecting the horizontal frames 26 and 28.

In addition, this invention is not restricted to the said embodiment, For example, you may use horizontal frames (assembly horizontal frame) other than the handrails 25 and 27. FIG. Moreover, you may apply not only to the suspension scaffold 1 but a grounding type temporary scaffold. Furthermore, it is good also as a structure which provided the latching hole 32 in each horizontal frame 26 and 28, and the latching pin 31 in the brace 33, respectively.
And the structure in the said embodiment is an example of this invention, and it cannot be overemphasized that a various change is possible in the range which does not deviate from the summary of the said invention.

1 Suspended scaffolding (temporary scaffolding)
2 Boiler (building)
21 Vertical frame 25, 27 Handrail (Assembly horizontal frame)
26, 28 Horizontal frame 31 Locking pin 31b Return plate 32 Locking hole 33 Brace 34, 35 Connecting part

Claims (4)

In the temporary scaffold structure used for various work of the building,
A pair of upper and lower horizontal frames spanned between a pair of adjacent vertical frames, and braces spanned between alternate ends of each horizontal frame;
The end of each horizontal frame and the end of the brace are rotatably connected ,
A locking pin that is prevented from coming off from the locking hole by the protrusion of the return plate and is detachable from the locking hole by immersing the return plate,
The locking pin is provided at one end of each horizontal frame, and the locking hole is provided at the other end,
A temporary scaffold structure, wherein a plurality of the horizontal frames are connected to form a pair of upper and lower assembly horizontal frames of a planar scaffold assembly . The coefficient such locking pin is positioned, that the locking pin is provided at both ends of the horizontal frame that is located on one outermost side of said each set body horizontal frame at both ends of the front Symbol each set body horizontal frame The temporary scaffold structure according to claim 1, wherein The temporary scaffold structure according to claim 1 or 2 , wherein each horizontal frame of the assembly is a handrail. One of the locking pin and the locking hole is provided in the brace connecting portion of each horizontal frame, and the both ends of the brace correspond to the locking pin or the locking hole provided in the connecting portion. The temporary scaffold structure according to any one of claims 1 to 3, wherein a locking hole or a locking pin is provided.

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