JP2700384B2 - Mounting device for temporary handrails - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art Temporary safety handrails used for the above-mentioned purpose are handrails which are mounted vertically on a steel beam or the like and fixed to a cylindrical body fixedly corresponding to each handrail support. Temporarily installed by fitting the lower end of the support,
When the handrail becomes unnecessary after the concrete is cast and the slab or the wall is built, the handrail support is pulled out from the tubular body, 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 tubular body (15) that supports the temporary safety handrail support (2) and a ring that fits up and down on the temporary safety handrail support (2)
(27), and the tubular body (15) is a support for a temporary safety handrail.
The lower end (2a) of (2) is fittable, and is fixed vertically to a steel beam or the like (14) corresponding to each column (2).
7) can be press-fitted and fixed at the upper end of an annular gap (26) between the cylindrical body (15) and the lower end (2a) of the column fitted into the cylindrical body (15). It is characterized in that the upper end of the ring (27) in the fixed state has a length protruding above the concrete finishing surface (24a) above the tubular body (15).

In implementing the device of the present invention, it is preferable that the ring (27) has an outer peripheral surface which is inclined so that the outer diameter becomes larger toward the upper end over the entire length thereof.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. As shown in FIG. 1A, a temporary safety handrail used in this embodiment includes a handrail main body 1 and a pair of left and right supports 2, and the handrail main body 1 is composed of two handrail frames 3A and 3B. It is configured. The handrail frame 3A is formed by bending a pipe material into a U-shape, and connecting the vicinity of the tips of a pair of upper and lower horizontal portions 4a and 4b to each other with a vertical connecting rod 5.
B is a U-shaped bent small-diameter pipe material that can be just fitted into the pipe material constituting the handrail frame 3A, and a pair of upper and lower horizontal portions 6a and 6b are provided on the upper and lower sides of the handrail frame 3A. It is fitted inside the pair of horizontal portions 4a and 4b so as to be able to be taken in and out freely. That is, the handrail frames 3A and 3B are fitted to each other so as to be able to expand and contract in the horizontal direction.

Reference numerals 7a and 7b denote both handrail frames 3A and 3B.
Are fixed to each other so as to be inextensible, and are screwed into through-holes formed by through-holes and fixing nuts near the top ends of the upper and lower horizontal portions 4a and 4b of the handrail frame 3A. By rotating, the horizontal portions 6a and 6b on the side of the handrail frame 3B fitted inside are fixed.

[0009] A pair of upper and lower headed pins 10a, 10b and 11a, 11b are provided on the outer end vertical portions 8, 9 of the handrail frames 3A, 3B at the same level in the upper and lower directions, respectively, facing horizontally outward, that is, the handrail frames 3A, 3B. The projection is provided in a direction parallel to the direction of expansion and contraction of 3B. The pins 10a-11b with heads are
As shown in FIGS. 2 and 3, the large diameter head 12 and the small diameter shaft 13
The small-diameter shaft portion 13 penetrates the handrail frame vertical portions 8 and 9 and is fixed by welding.
At this time, the small-diameter shaft portion 13 is exposed to a required length between the handrail frame vertical portions 8 and 9 and the large-diameter head 12.

Each of the columns 2 is vertically erected at appropriate intervals in the handrail length direction by fitting the lower end 2a into a cylindrical body 15 vertically fixedly mounted on a steel beam 14 or the like. In this case, a pair of upper and lower locking members 16 are fixedly protruded laterally. These locking members 16 are formed by bending an iron plate into a U-shape in cross section as shown in FIGS. 2 and 3, and have locking holes 18a, 18b in the left and right side plate portions 17a, 17b.
18b is provided. These locking holes 18a, 18b
The large-diameter hole 19 into which the large-diameter head 12 of the headed pins 10a to 11b can be fitted, and the small-diameter shaft of the headed pins 10a to 11b connected directly downward from the large-diameter hole 19 Part 1
3 is a so-called ball-shaped through-hole having a small-width hole portion 20 into which it is fitted. A pair of upper and lower locking holes 18a, 18b provided separately on the upper and lower locking members 16 are respectively provided with a pair of upper and lower pins 10a, 1 on the handrail frames 3A, 3B side.
0b and 11a, 11b are arranged at the same vertical interval.

When the handrail body 1 is installed between the columns 2, the fixing screws 7a and 7b are loosened and the handrail frame 3 is loosened.
A and 3B are contracted so that the total length is shorter than the interval between the two columns 2. Then, the pins 10a and 10b with heads of the handrail frame 3A on one side are engaged with the locking holes 18a of the pair of upper and lower locking members 16 of the corresponding column 2 on the corresponding side. That is, the large-diameter head 12 of the pins 10a and 10b with heads.
Into the large hole portion 19 of each locking hole 18a. Then, the both handrail frames 3A, 3B are extended, and the pins 10a, 10b with the heads of the handrail frame 3B are engaged with the locking holes 18b in the pair of upper and lower locking members 16 of the corresponding column 2 on the corresponding side. Combine. In such a state, the handrail frame 3A,
3B is lowered, and the small-diameter shaft portions 13 of the head-mounted pins 10a to 11b are fitted into the small-width hole portions 20 of the engaging holes 18a and 18b which are engaged. Thereafter, the fixing screws 7a and 7b are tightened to fix the both handrail frames 3A and 3B to each other, and locked in a state in which they cannot be expanded or contracted.

The safety handrail constructed by laying the handrail body 1 between the two pillars 2 as described above has the advantage that even if an external force for lifting the handrail is applied to the handrail body 1, each of the heads can be used. The small diameter shaft portion 13 of each of the pins 10a to 11b is
Since the large-diameter head 12 only moves upward within the holes a and 18b, there is no danger that the large-diameter head 12 will fall out of the large-width holes 19 of the locking holes 18a and 18b. That is, there is no possibility that the handrail main body 1 comes off the support 2. When the handrail body 1 is to be removed from the column 2, the handrail body 1 is lifted with the fixing screws 7a and 7b loosened, and the large-diameter heads 12 of the head-mounted pins 10a to 11b are locked. 18a, 18b to the position of the large hole portion 19,
The handrail frames 3A and 3B may be contracted to each other, and the pins 10a to 11b with the heads may escape from the locking holes 18a and 18b. The removed handrail body 1 reduces the two handrail frames 3A, 3B to the minimum length and fixes the
a, 7b or both handrail frames 3A,
The 3Bs can be withdrawn and separated from one another, reduced in bulk and transported and stored.

The temporary safety railing constructed as described above is temporarily mounted on a steel beam 14 or the like by the mounting device according to the present invention. 1A and 1B.
As shown in FIG. 1, the cylindrical body 15 supports the column 2 of the temporary safety railing, and the ring 27 is fitted to the column 2 of the temporary railing so as to be able to move up and down. The tubular body 15 is
The lower end 2a of the temporary safety handrail support column 2 is fittable therein, and is vertically fixed to a steel beam or the like 14 corresponding to each support column 2.

The ring 27 includes the cylindrical member 15 and the cylindrical member 1.
5 can be press-fitted and fixed to the upper end of the annular gap 26 between the lower end 2a of the support and the concrete-finished surface 24a above the tubular body 15 with the upper end of the ring 27 in this press-fitted and fixed state. That is, it has a length protruding above the surface of a concrete slab 24 constructed by casting concrete to a predetermined thickness on a steel beam 14 or the like. The ring 27 has a wedge-shaped peripheral wall in a vertical section over the entire length. Therefore, the ring 27 has an outer peripheral surface inclined so that the outer diameter becomes larger toward the upper end side over the entire length.

When temporarily installing a temporary safety handrail, the lower end 2a of the handrail support 2 to which the ring 27 has been fitted in advance.
15 is fixedly mounted on a steel beam 14 or the like.
And the ring 27 is hit downward with a hammer or the like to press-fit and fix the ring 27 at the upper end of the annular gap 26 between the tubular body 15 and the inner column lower end 2a. As a result, the cylindrical body 15
Since the upper end of the annular gap 26 between the inner pillar lower end 2a and the inner pillar lower end 2a is closed by the ring 27, the concrete (mortar) does not enter the annular gap 26 when the concrete is poured. . Further, since the ring 27 projects above the concrete finished surface 24a, concrete (mortar) does not contact the peripheral surface of the handrail support 2 and solidify.

Accordingly, when the handrail is removed from the tubular body 15 because the handrail becomes unnecessary, the handrail support 2 is removed.
By swinging up, down, left and right,
The ring 27 can be easily pulled out from the tubular body 15 together with the ring 27 or with the ring 27 left on the tubular body 15 side. At this time, if the outer peripheral surface of the ring 27 is inclined in an upwardly expanding tapered shape as shown in FIG.
7 can be easily pulled out from the concrete slab 24. If you pull out the handrail support 2, the ring 2
When the ring 7 remains, the ring 27 is also pulled out of the cylindrical body 15, and then the mortar is filled in the voids where the pillars 2 and the ring 27 are drawn, and the work is completed by flattening the surface. I do.

[0017]

As described above, according to the temporary handrail mounting device of the present invention, the space between the cylindrical body (15) and the lower end of the handrail support (2a) fitted into the cylindrical body (15) is provided. Annular void (26)
Then, the ring (27) externally fitted to the handrail support (2) is press-fitted and fixed, and the upper end of the annular gap (26) can be closed. There is no danger that the concrete (mortar) to be provided will enter the annular space (26) and make it impossible to remove the handrail support (2).
Moreover, it is not necessary to cut and remove the upper end of the tubular body (15) after finishing the concrete slab (24) as in the conventional case. Further, the preparation work can be performed easily, easily and efficiently, as compared with the case where the upper end of the annular space is closed by wrapping a gum tape.

Furthermore, the ring (27) eliminates the swinging movement (play) of the handrail support (2) in the front-rear and left-right directions with respect to the tubular body (15), so that the safety handrail is temporarily provided firmly. Safety can be improved. In particular, according to the configuration of the second aspect, it is easy to remove the ring (27) from the concrete slab (24).

[Brief description of the drawings]

1A is an exploded partially cutaway side view showing a temporary safety handrail and a tubular body erected on a steel beam or the like, and FIG. B is an embodiment of the mounting device of the present invention; It is a longitudinal front view of the use state which shows.

FIG. 2 is a cross-sectional plan view showing an engaging portion between a support and a handrail main body.

FIG. 3 is a perspective view showing a main part of FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Handrail main body 2 Post 2a Post lower end 3A Handrail frame 3B Handrail frame 14 Steel beam etc. 15 Handrail post supporting tubular body 16 Locking member 24 Concrete slab 24a Concrete finishing surface 26 Annular gap 27 Vertical wedge-shaped ring

Claims (2)

(57) [Claims] A cylindrical body (15) for supporting a pillar (2) of a temporary safety handrail, and a ring (27) fitted to the pillar (2) of the temporary safety handrail so as to be able to move up and down. The tubular body (15) is attached to the lower end (2) of the temporary safety handrail support (2).
a) can be fitted, and fixed vertically to a steel beam or the like (14) corresponding to each column (2), and the ring (27) is made up of the tubular body (15) and the tubular body ( 15) can be press-fitted and fixed to the upper end of the annular gap (26) between the lower end (2a) of the support and the column (15) fitted in the cylindrical body (15). ) Above the concrete surface (24
a) A device for mounting a temporary safety railing having a length protruding upward. 2. A temporary safety railing mounting device according to claim 1, wherein the ring has an outer peripheral surface inclined so that an outer diameter becomes larger toward an upper end side over the entire length thereof.