JPH0748868Y2 - Handrails for stairs of frame scaffolding - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a handrail configured for stairs of a frame scaffold.

[Conventional technology]

The frame scaffold connects multiple building frames arranged at the same height at regular intervals with connecting materials such as braces, and these are stacked over multiple floors, and stairs are erected between the upper and lower floors. And is assembled along the outer surface of the building. A horizontal member is erected between the tops of adjacent building frames so that workers can come and go and perform a predetermined work using the horizontal member as a scaffold.

[Problems to be solved by the device]

In each layer of the frame scaffolding, workers on the horizontal members are prevented from falling because the braces between the building frames act as handrails, and there is a special handrail above the horizontal members on the top floor. This is also a safety measure due to the installation of. Thus, while workers on horizontal members have handrails or substitutes for them, safety is ensured, but the safety measures do not exist on the stairs connecting the upper and lower floors. was there.

The present invention has been made in view of the above-mentioned problems of the conventional technology, and aims to ensure safety even when the stairs of the frame scaffolding are lifted and lowered.

[Means for Solving the Problems]

The staircase handrail of the frame scaffold of the present invention has a rod-shaped middle part of the handrail material that is inclined along the stairs as a whole in the middle part in the longitudinal direction of the horizontal frame that is installed between adjacent building frames at the same height. It is pivotally connected. A clamp which is fixed to one of the building frames below the horizontal frame is attached to the lower end of the handrail member below the horizontal frame. An upper end of the handrail member above the horizontal frame is bent downward, and a detachable engaging portion is formed between the upper end and the horizontal frame.

[Action]

In the installation procedure of the handrail for stairs of this invention, a horizontal frame is installed between the upper parts of adjacent building frames at the same height where the stairs are installed.
At this time, the lower part of the handrail member faces the lower side of the stairs, and the upper part thereof faces the upper side of the stairs. Here, the clamp at the lower end of the handrail is externally fitted to the vertical portion of the adjacent building frame on the lower side of the stairs and is not yet fixed. Next, the lower end of the upper part of the handrail and the horizontal frame are engaged with each other at the engaging portion, and then the clamp is fixed to the building frame.

As a result, the handrail member has its lower end fixed to the building frame, its upper end engaged with the horizontal frame, and its middle part pivotally attached to the horizontal frame. Therefore, the handrail is supported at these three points to support the frame scaffold. Part of. Moreover, the stair handrail can be installed along the stairs even after the stairs are installed. Thus, the safety of workers is ensured as a handrail when going up and down stairs.

〔Example〕

FIGS. 1 and 2 show an example of handrails for stairs of a frame scaffold, in which the horizontal frame 1 is made of steel pipe, and hooks 1a are fixed to the front and rear, and in the hooks 1a, adjacent building frames at the same height. 2,2
It is installed between. A torii type building frame is used as the building frame 2 in this embodiment, and the horizontal frame 1 is installed between the horizontal portions 2a.

The horizontal frame 1 is erected between the building frames 2 on which the stairs 3 are erected, and in the middle of the horizontal frame 1 in the longitudinal direction,
A rod 5 is formed of a steel pipe, and the handrail member 4 that is inclined along the stairs 3 as a whole is pivotally attached by means of a pin 5. A clamp 6 that is fixed to a vertical portion 2b of one of the building frames 2 below the horizontal frame 1 is attached to the tip of a lower portion 4a of the handrail member 4 that is below the horizontal frame 1. The clamp 6 is a known one for fixing to the outer circumference of the steel pipe, and the lower end of the handrail member 4 is pivotally attached by a pin 6a.

Further, the upper portion 4b of the handrail member 4 above the horizontal frame 1 is bent in the middle and the tip thereof is directed downward, and the tip opening 4c thereof is a projection 1b projectingly provided on the upper surface of the horizontal frame 1. The tip end opening portion 4c and the projection 1b constitute a detachable engaging portion 7.

The handrail member 4 is not in the same plane as shown in FIG. 2 due to the support position of the clamp 6, the horizontal frame 1, and the protrusion 1b at three points, and is slightly warped.

Then, the handrail for stairs of this frame scaffold is assembled as follows. First, as shown in FIG. 4, building frames 2 of the same height from the ground are built at predetermined intervals, and horizontal members (scaffold boards) are placed between them.
8 and the cross braces 9, and then the building frames 2 are added on top of these building frames 2 and similarly connected by the horizontal members (scaffolding plates) 8 and the cross braces 9.

At this time, a staircase 3 is installed between a certain building frame 2 on the upper stage and each horizontal portion 2a of the lower building frame 2 on the lower side next to it, and the handrail for stairs of this invention is assembled.

For the handrail for stairs, first attach the hooks 1a at both ends of the horizontal frame to the stairs 3
The horizontal frames 1 are horizontally installed by engaging the horizontal portions 2a of the adjacent building frames 2 at the same height before and after. Next, the clamp 6 at the tip of the lower portion 4a of the handrail member 4 is engaged with the outer periphery of the vertical portion 2b of the building frame 2, and this is not yet fixed. In addition, pin 5
While vertically pivoting the handrail member 4 around the center (at this time, the clamp 6 slides with respect to the vertical portion 2b of the building frame 2), the opening 4c at the tip of the upper portion 4b of the handrail member 4 is moved horizontally. Frame 1
After being externally fitted onto and engaged with the protrusion 1b, the clamp 6 is finally tightened.

Thus, the handrail member 4 is fixed in the vertical direction by the clamp 6 and the pin 5, and is also fixed in the horizontal direction by the engaging portion 7 in addition to these, and is integrated with the frame scaffold. And
Below the horizontal frame 1, the lower part 4a of the handrail member 4 protects the worker, and above the horizontal frame 1 the upper part 4b of the handrail member 4 protects the worker. In addition, handrail material 4
As a whole, that is, the lower part 4a and the part of the upper part 4b close to the pin 5 are along the stairs 3, but do not need to be exactly parallel to the stairs 3. If these are roughly parallel to the stairs 3, they can sufficiently function as a handrail.

In FIG. 4, the building frame 2 and the cross braces 9 indicated by broken lines indicate the portions to be stacked further on.

Thus, the worker who moves up and down the stairs 3 can balance the weight by grasping the handrail member 4 and avoid the risk of falling.

Further, this handrail can be reduced in bulk by changing the angle between the handrail member 4 and the horizontal frame 1 at the time of disassembling the frame scaffolding. Further, the bending portion 4d shown in FIG. If it can be bent, it can be made into an elongated shape when folded, which is convenient for transportation and storage.

In addition, in this embodiment, the bent portion of the upper portion 4b of the handrail member 4 is bent into a square shape, but these may be bent so as to be curved. Further, although the engaging portion 7 at the tip of the upper portion 4b is in the form of concave and convex fitting, it is also possible to adopt another known engaging structure.

[Effect of device]

As described above, according to the present invention, the safety when climbing the stairs of the frame scaffolding is improved, and the transportation and storage when the frame scaffolding is disassembled are easy, and the structure is simple and inexpensive. There is an effect.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view showing an embodiment of the present invention, FIG. 2 is a partially cutaway side view of the same, and FIG. 3 is an enlarged perspective view of an essential part of FIG. FIG. 4 is a front view of the frame scaffold. 1 ... Horizontal frame, 2 ... Building frame, 3 ... Stairs, 4 ... Handrail material, 4a ... Lower handrail, 4b ... Upper handrail, 5 ... Pin, 6
…… Clamp, 7 …… Engagement part.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hidetoshi Koitabashi 1418-7 Odaira Sarashina, Bandai-cho, Yama-gun, Fukushima Prefecture Innovative construction office at Inawashiro No. 1 Power Plant, Tokyo Electric Power Co., Inc. (72) Yasuyuki Nakajima Fukushima 1418-7 Oyama, Bandai-cho, Yamada-gun, Yamanashi Prefecture Oyama 1418-7 Tokyo Electric Power Co., Inc. Inawashiro No. 1 Power Station Renovation Construction Office (72) Yuiro Saito Fukushima Prefecture, Aizuwakamatsu City, Jericho 10-1 Tokyo Electric Power Co., Ltd. Inawashiro Inside the power station

Claims (1)

[Scope of utility model registration request] 1. A frame scaffolding in which a plurality of building frames of the same height are connected by connecting members such as braces, which are laminated over a plurality of floors, and stairs are erected between the upper and lower floors, A horizontal part of the handrail is pivotally attached to a middle part in the longitudinal direction of the horizontal frame that is installed between adjacent building frames at the same height, and the middle part of the handrail that is rod-shaped and inclines along the stairs as a whole is pivoted. At the tip of the lower part below, a clamp that is fixed to one of the building frames below the horizontal frame is attached, and the tip of the upper part above the horizontal frame of the handrail is bent downward,
A stair handrail for a framed scaffold, characterized in that a detachable engaging portion is formed between the upper end and the horizontal frame.