JP2700387B2 - Temporary safety handrail device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temporary safety handrail device which is mounted on a steel beam around a slab of a building under construction or around an opening to ensure the safety of workers. It is.

[0002]

2. Description of the Related Art Temporary safety handrails used for the above-mentioned purpose are formed by a supporting tubular body fixedly installed on a steel beam or the like corresponding to each handrail support. It is temporarily installed by fitting the lower end of the handrail support. When the handrail becomes unnecessary after the concrete is cast and the slab or the wall is constructed, the hand is removed from the cylindrical body. The sliding strut is removed and removed and reused.

However, in reality, there are cases where the concrete to be poured enters the gap between the tubular body and the handrail support and solidifies, and the handrail support cannot be removed from the tubular body. Many. Therefore, the cylindrical body longer than necessary is fixedly erected so that the upper end of the cylindrical body protrudes sufficiently higher than the concrete finishing surface (slab surface), and the gap between the cylindrical body and the handrail support is provided. In order to prevent concrete from easily intruding into the concrete, a short cylindrical body that is buried in the concrete is fixedly erected, and protrudes upward from the upper end of the cylindrical body and the cylindrical body. It was necessary to wrap a gum tape or the like around the handrail support to prevent concrete from entering the gap between the tubular body and the handrail support.

When using the former long tubular body, it is necessary to cut out and remove the tubular part protruding from the surface of the concrete slab after removing the handrail and removing the handrail. It is not practical because it takes time. Even with the latter method of winding the gum tape, it takes a lot of trouble and time to wind the gum tape, and there is a problem in practicality.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and its features are indicated by reference numerals in the embodiments described later. A temporary safety handrail, comprising a temporary safety handrail (1) and a handrail support tubular body (12) projecting above a steel beam (11)
(1) has two columns (2) with variable spacing, and each column
(2) is provided with a tapered lower end (10) of a length that protrudes above a concrete slab (14) cast on the steel beam or the like (11) and is tapered downward, and a cylindrical body. (12) is a length to be buried in the concrete slab (14), and is vertically fixed to a steel beam or the like (11) corresponding to each support (2) of the temporary safety handrail, and the support ( It is characterized in that the tapered lower end (10) of 2) has a tapered hole (13) which spreads upward and just fits inside.

In implementing the apparatus of the present invention, the tapered lower end portion (10) of each column (2) can be formed by processing the column (2) itself. It can be constituted by another cylindrical member (16) externally fitted and fixed to the lower end, and in this case, the cylindrical member (16) is provided with a bottom (16a) that abuts on the lower end (2a) of the column. Can be kept.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. A temporary safety handrail 1 used in this embodiment includes a pair of right and left columns 2 as shown in FIG.
And three frames 3A to 3C constituting a handrail main body. The frames 3A and 3B are formed by bending a pipe material into a U-shape, and the frame 3C is formed by a central portion of a pair of upper and lower horizontal members 4a and 4b which can be fitted into the pipe material constituting the frames 3A and 3B. It is a falling H-shaped member formed by connecting two members by a vertical member 5, and the both ends of a pair of upper and lower horizontal members 4a, 4b are connected to frames 3A, 3
It is inserted into the upper and lower horizontal portions 6a, 6b and 7a, 7b of B so that it can be taken in and out freely. Therefore, by moving the frames 3A, 3B on both sides horizontally with respect to the center frame 3C, the entire length of the entire handrail can be adjusted.

[0008] If necessary, fixing means for fixing the frames 3A and 3B on both sides to the central frame 3C can be provided. The fixing means includes, for example, upper and lower horizontal portions 6a, 6b of the frames 3A, 3B on both sides.
, 7a, 7b may be provided with lock bolts for pressing and fixing the upper and lower horizontal members 4a, 4b of the central frame 3C.

[0009] The two columns 2 are composed of frames 3A, 3B on both sides.
At the upper end, pipe members 8a and 9a which are movably fitted to upper horizontal portions 6a and 7a are provided.
A, 3B having a pipe member 8b, 9b which is movably fitted to the lower horizontal part 6b, 7b at an intermediate height.
The position can be arbitrarily adjusted in the handrail length direction with respect to both side frames 3A and 3B. A lower end of each of the columns 2 is formed with a tapered lower end portion 10 that tapers downward. If necessary, fixing means for fixing the support 2 to the frames 3A and 3B on both sides, for example, pipe members 8a to 9
b can be provided with a lock bolt.

[0010] On the steel beam or the like 11 on which the temporary safety handrail constructed as described above is temporarily installed, a handrail support tubular body 12 is vertically fixed at a position corresponding to each support 2 by welding or the like. It is protruding. As shown in FIG.
The tapered lower end 10 of each handrail support 2 is provided with a tapered hole 13 that is widened upward and fits just inside. The tubular body 12 has a length to be buried in the concrete slab 14 cast on the steel beam 10 or the like, and the pillar 12 is fitted in the tapered hole 13 of the tubular body 12. The second tapered lower end portion 10 has a length protruding above the concrete slab 14.

When the temporary safety handrail 1 is temporarily installed, the distance between the two columns 2 can be changed (when a fixing means for fixing the columns 2 after adjusting the distance is provided, at least one of the columns 2 is fixed). In this state, the tapered lower ends 10 of the two columns 2 are fixedly mounted on a steel beam 11 or the like, and the tapered holes of the cylindrical body 12 are fixed. 13 and each strut 2
Is vertically supported by the tubular body 12. Thereafter, if necessary, the columns 2 are fixed to the handrail frame to complete the temporary installation of the temporary safety handrail 1. When the concrete slab 14 is cast on the steel beam 11 or the like, the level of the slab surface 14a is set between the upper end of the cylindrical body 12 and the upper end 10a of the tapered lower end 10 of the column 2. Just put concrete.

When the handrail 1 becomes unnecessary, each column 2 is removed from the cylindrical body 12. At this time, the surface of the column 2 which is in contact with the concrete slab 14 is formed around the tapered lower end 10. And the tapered hole 13 of the tubular body 12 and the tapered lower end 10 of the column 2 are fitted with almost no gap, and concrete mortar hardly penetrates and solidifies between them. 2B, the column 2 can be easily pulled out from the concrete slab 14, as shown in FIG. 2B. After the handrail 1 is removed, as shown in FIG. 2C, the mortar 15 is filled in the voids (including the tapered holes 13 of the cylindrical body 12), which are the traces of pulling out the columns 2, and the surface is flattened. The work is completed by finishing.

It is needless to say that the structure of the temporary safety handrail 1 is not limited to the above embodiment. Also,
In the above embodiment, the lower end portion of the column 2 itself is drawn in a tapered shape to form the tapered lower end portion 10. However, as shown in FIG. Can be configured to be externally fitted to the lower end portion of the housing and fixed by welding or the like. In this case, by leaving the straight portion 16a at the lower end of the tubular member 16 as shown in the figure, the work of holding and fixing the tubular member 16 concentrically to the column 2 becomes easier. Further, the tapered hole 13 of the tubular body 12 fixedly provided on the steel beam 11 may have a straight portion 13a at the lower end thereof.

Further, when the tapered lower end 10 of the column 2 is formed by using another cylindrical member 16 as described above, the column 2 is attached to the lower end of the cylindrical member 16 as shown in FIG. 3B. A bottom portion 16b abutting on the lower end 2a can be provided. The bottom 16b is connected to the cylindrical member 1 as shown in the figure.
6 may be completely closed, or may be an annular bottom or a bottom partially projecting in the circumferential direction.
Further, when the tapered lower end portion 10 of the column 2 is formed by using another cylindrical member 16, the cylindrical member 16 is configured as shown in FIG.
As shown in B, the inner diameter is made slightly smaller than the outer diameter of the lower end of the column 2 from a synthetic resin material, so that it can be configured so as to be press-fitted to the lower end of the column 2. Of course, the cylindrical member 16 can be externally fitted and fixed to the lower end of the column 2 using an adhesive.

[0015]

As described above, according to the temporary safety handrail device of the present invention, the cylindrical body (12) vertically fixed and projected on the steel beam or the like has a tapered hole ( By fitting the tapered lower end portion (10) of each support (2) on the handrail side into the lower part (13), the handrail support (2) can be held vertically and stably. And two handrail posts
Since (2) can be changed in spacing, even if there is some variation in the spacing between the two cylindrical bodies (12) protruding above steel beams, etc., the handrail support (2 ) To each tubular body (12)
, So that the temporary installation of the handrail can be easily performed.

As described above, the temporary safety railing can be stably and simply and easily erected.
Tapered hole (13) of (12) and tapered lower end of column (2)
The concrete mortar that constitutes the concrete slab hardly penetrates and solidifies between them due to the fitting with (10), and the tapered lower end (10) of the column (2) projects above the concrete slab Therefore, it is possible to easily and easily remove the handrail support (2) from the concrete slab after use. Of course, the tubular body (12) supporting the handrail support (2) is buried in the concrete slab, so after removing the handrail support, the concrete slab surface can be smoothed only by filling the traces with concrete mortar. And post-processing can be performed easily and easily.

In particular, according to the structure of the second aspect, the support column
(2) does not need to be made of a special large-diameter pipe material, and the diameter of the tapered lower end (10) can be made relatively large, so that there is no problem in strength. Claim 3
According to the configuration described in (1), the cylindrical member (16) constituting the tapered lower end portion (10) is externally fitted to the lower end portion of the column, and the bottom portion (16
b) can be easily positioned simply by contacting the lower end (2a) of the column, and the work of mounting the tubular member (16) can be performed easily and easily.

[Brief description of the drawings]

FIG. 1 is a front view showing a temporary safety handrail and a tubular body erected on a steel beam or the like.

FIG. 2A is a longitudinal sectional front view showing a main part in the use state of a handrail, FIG. 2B is a longitudinal sectional front view showing a state where a handrail support is removed, and FIG. FIG.

FIG. 3 is a longitudinal sectional front view of a main part showing another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Temporary safety handrail 2 Prop 2a Prop lower end 3A U-shaped frame which constitutes a handrail main body 3B U-shaped frame which constitutes a handrail main body 3C E-shaped frame which constitutes a handrail main body 10 Lower tapered lower end 11 Steel beam, etc. 12 Handrail support cylindrical body 13 Upper tapered hole 13a Straight part 14 Concrete slab 14a Concrete slab surface 15 Filling mortar 16 Tubular member 16a Straight part 16b Bottom part

Claims (3)

(57) [Claims] A temporary safety handrail (1) and a handrail support tubular body (12) projecting above a steel beam (11) or the like are provided. , Two columns with variable spacing
Each strut (2) has a tapered lower end of a tapered lower end having a length protruding above a concrete slab (14) cast on the steel beam or the like (11). The cylindrical body (12) has a length to be buried in the concrete slab (14) and is perpendicular to a steel beam or the like (11) corresponding to each support (2) of the temporary safety handrail. A safety handrail device for temporary use having a tapered hole (13) which is upwardly fixed and has an upwardly widened tapered hole (13) in which the tapered lower end portion (10) of the column (2) just fits. 2. The method according to claim 1, wherein the tapered lower end of each of the columns is formed by a tubular member fixedly fitted to the lower end of the column. Temporary safety handrail device. The lower end (2a) of the column (2) is provided with the cylindrical member (16).
3. The temporary safety handrail device according to claim 2, further comprising a bottom portion (16b) that comes into contact with the handrail.