JP3146133B2 - Safety railing mounting device for temporary construction - 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 railing mounting device for securing workers' safety on a steel beam around a slab of a building under construction or around an opening. About.

[0002]

2. Description of the Related Art A conventional temporary handrail for temporary use used for the above-mentioned purpose is composed of a handrail support provided on a tubular body which is fixed upright corresponding to each handrail support vertically to a steel beam or the like. Temporarily installed by inserting the lower end, when concrete is cast and slabs and walls are built and handrails are no longer needed, handrail posts are removed from the tubular body, removed and reused. It is configured as follows.

[0003]

However, in practice, the cast concrete mortar enters the gap between the cylindrical body and the handrail support and solidifies, and the handrail support is removed from the cylindrical body. There was a problem that it often became impossible.

In order to solve such a problem, an unnecessarily long cylindrical body is fixedly erected so that the upper end of the cylindrical body projects sufficiently higher than the finished surface of the concrete (slab surface). Prevent concrete from entering the gap between the tubular body and the handrail support, or fix a tubular body short enough to be buried in the concrete, and fix the upper end of the tubular body and the It is conceivable to prevent the concrete from entering the gap between the cylindrical body and the handrail support by wrapping a gum tab or the like around the handrail support protruding upward.

However, when using the former long tubular body, it is necessary to remove the handrail by removing the handrail support, and then cut and remove the upper end of the tubular body projecting from the surface of the concrete slab. It is not practical because it requires a lot of labor and time, and even with the latter method of winding the gum tape, it takes a lot of time and effort to wind this gum tape, and there is a problem in practicality.

Further, if the gap between the inner periphery of the cylindrical body and the outer periphery of the handrail support is increased, the handrail will be unstable and the stability will be poor. If the gap is reduced, the handrail support will be inserted into or removed from the cylindrical body. Or it takes time and effort.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and the features thereof are indicated by reference numerals in the embodiments described later. The temporary safety railing mounting device of the present invention is a steel beam or the like (11)
A cone-shaped outer peripheral surface (7a) in which at least the upper outer peripheral surface becomes larger in diameter toward the upper end is attached to a cylindrical body (5) that is vertically fixed to
A ring (6) having a pressure contact between the cone-shaped outer peripheral surface (7a) and the inner periphery of the upper end portion of the tubular body (5), and the upper end of the concrete slab surface (13) above the tubular body (5). ) Is inserted and fixed to protrude upward.
The middle part of the inner diameter (part of the inner peripheral surface (8b) in the embodiment ) where the lower end portion (3a) of the temporary safety handrail (1) just fits inside, and the lower end side from the inner peripheral surface (8b) The lower end of the ring (6a), whose diameter can be expanded by the slit (9) with the lower end open
And the temporary safety railing inserted into this ring (6)
Having features post lower end of (1) by (3a) in that the ring lower end and the inclined protrusion (10) for causing the diameter of the (6a) is formed.

Preferably, the inclined protrusion (10) is provided at the lower end of the column (3).
The outer peripheral surface of the lower end of the ring (6a) is fitted to the cylindrical body (5)
Is formed to have a thickness to be pressed against the inner circumference. In addition, ring (6)
A tapered inner peripheral surface (8a) having a diameter increasing toward the upper end between the intermediate portion (the inner peripheral surface (8b) in the embodiment) and the upper end;
Is formed.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of a temporary safety railing mounting device according to an embodiment of the present invention; FIG.

As shown in FIG. 1, a temporary safety handrail 1 used in this embodiment includes a handrail body 2 and a pair of right and left columns 3 and 3 extending downward from the handrail body 2.
It is composed of The handrail body 2 is formed by bending and welding a pipe material so as to form a rounded rectangular shape, and the columns 3 are coupled at appropriate distances from both ends of upper and lower horizontal portions 2a and 2b. Are connected by a vertical member 4.

[0011] The temporary safety railing 1 is made of steel beams or the like.
1 is temporarily installed by the mounting device of the present invention. This mounting device includes a tubular body 5 that supports the column 3 of the temporary safety handrail 1, and a ring 6 that fits around the column 3.

As shown in detail in FIG. 4, the tubular body 5 is made of a short pipe material into which the ring 6 can be fitted. It is erected vertically by welding or the like. Since the temporary safety handrail 1 in the illustrated example is provided with the columns 3 and 3 fixedly, the fixing position of the tubular body 5 needs to correspond to the columns 3 and 3 accurately. In the case of difficulty, the temporary safety handrail 1 is constructed so that the handrail body 2 can be expanded and contracted in the horizontal direction.
It is needless to say that the distance between the columns 3 and 3 may be adjusted in accordance with the cylindrical body 5.

The ring 6 is made of a synthetic resin and has a cone shape which is inclined so that the outer diameter becomes larger toward the upper end over substantially the entire length except for the cylindrical outer peripheral surface 7b at the lower end as shown in FIGS. It has an outer peripheral surface 7a. When the ring 6 is fitted into the cylindrical portion 5 from the lower end thereof, the cone-shaped outer peripheral surface 7a is fitted and fixed to the inner periphery of the upper end of the cylindrical body 5 by press-fitting. In the press-fit fixed state, the upper end of the ring 6 protrudes from the upper end of the tubular body 5 by a predetermined length or more, and the protruding length becomes a length protruding above the surface 13 of the concrete slab 12 shown in FIG. , The outer diameter and the length are set.

The inner periphery of the ring 6 has a cylindrical inner peripheral surface 8b in which the column 3 is fitted almost exactly at the middle part in the vertical direction. Formed on the tapered inner peripheral surface 8a. A portion of the inner circumference of the ring 6 below the cylindrical inner circumferential surface 8b is formed on a lower tapered inner circumferential surface 8c having a slightly smaller diameter toward the lower end, and extends from the lower end of the ring 6 to the lower end of the cylindrical inner circumferential surface 8b. Four slits 9 having an open lower end are formed at regular intervals in the circumferential direction. Further, the lower end 6a of the ring 6 is fitted to the inner periphery of the lower end 6a of the ring 6 by fitting the lower end 3a of the support column 3.
An inclined protrusion 10 for increasing the diameter of a is formed. The inclined protruding portion 10 is set to a thickness such that the outer peripheral surface of the lower end portion 6a of the ring is pressed against the inner periphery of the tubular body 5 when the lower end portion of the column 3 is fitted.

In the above construction, the provisional safety handrail 1
4A, after the ring 6 is fitted into the tubular body 5 in advance, the support 3 of the temporary safety handrail 1 is positioned immediately above the tubular body 5 as shown in FIG. The pillar lower end 3a is fitted into the ring 6 as indicated by the arrow. At this time, since the upper inner peripheral surface of the ring 6 is formed on the tapered inner peripheral surface 8a, the lower end portion 3a of the supporting column is easily fitted into the ring 6, and is smoothly fitted onto the cylindrical inner peripheral surface 8b which is almost just fitted. It is possible to temporarily hold the safety rail for temporary use 1 with the support column 3 in a substantially vertical state. Thereafter, when the support 3 is strongly pressed down, as shown in FIG. 4B, the lower part of the ring 6 can be expanded in diameter by the slit 9, so that the support lower end 3a.
Is lowered while increasing the diameter of the lower tapered inner peripheral surface 8 c of the ring 6, and the outer peripheral surface of the ring lower end 6 a is fitted to the inner peripheral surface of the cylindrical body 5 by fitting the lower end 3 a of the support to the inclined projection 10. Press against the surface. Then, the temporary safety handrail 1 is supported by the lower end 3a of the pillar abutting on the steel beam 11 or the like.

In this state, the cone-shaped outer peripheral surface 7 of the ring 6
a is press-fitted and fixed at the upper end position of the cylindrical body 5, and at the lower end position of the ring 6, the outer periphery of the ring lower end 6 a is
The ring 6 is firmly fixed to the cylindrical body 5 because it is pressed against and fixed to the inner circumference, and the column 3 is firmly fixed to the ring 6 by fitting the lower end 3 a thereof to the inclined protrusion 10. And from the lower end of the ring 6 to the middle part of the cylindrical inner peripheral surface 8b is fitted and held with almost no gap, and the column 3 is firmly fixed and supported by the cylindrical body 5 via the ring 6. In addition, the temporary safety handrail 1 is stably temporarily fixed.

Thereafter, concrete mortar is cast to form a concrete slab 12. At this time, since the upper end opening of the cylindrical body 5 is closed by the ring 6, the concrete mortar that has been cast is
Since the ring 6 does not penetrate into the gap between the support 3 and the ring 6 projects above the surface 13 of the concrete slab 12, the concrete mortar contacts the peripheral surface of the support 3 and solidifies. Nor.

When the temporary safety railing 1 is no longer needed, the column 3 is pulled out from the ring 6 and the ring 6 is then moved into the cylindrical body 5 and the concrete slab 1 above the cylindrical body 5.
Pull out from 2. At this time, since the outer peripheral surface of the ring 6 is formed on the cone-shaped outer peripheral surface 7a and has a draft,
It can be pulled out relatively easily. After the column 3 and the ring 6 are pulled out, as shown in FIG. 4C, the work is completed by filling the vacant space with the concrete mortar 14 and finishing the concrete slab surface 13 flat. .

In the description of the above embodiment, the outer peripheral surface of the inclined projection 10 on the inner periphery of the lower end 6a of the ring 6 is pressed against the inner peripheral surface of the tubular body 5 when the lower end 3a of the support is fitted. Although the height has been described, it is not always necessary to make the pressure contact, and the height may be such that the gap between the outer peripheral surface of the ring lower end portion 6a and the inner peripheral surface of the cylindrical body 5 is reduced. Also, in the description of the above embodiment, the example in which the column lower end 3a completely penetrates the inclined protruding portion 10 is shown. The outer peripheral surface of the lower end 6a of the ring may be pressed against the inner periphery of the tubular body 5 in a state of being inserted and fitted halfway.

[0020]

As described above, according to the mounting device for a temporary safety handrail of the present invention, the ring () in which the upper end opening of the tubular body (5) projects above the concrete slab surface (13). 6) The concrete mortar that has been cast intrudes into the gap between the tubular body (5) and the strut (3), or solidifies when the concrete mortar contacts the peripheral surface of the strut (3) No safety rails for temporary use (1)
To remove the stake, simply pull out the column (3) from the ring (6) and then pull out the ring (6) from the concrete slab (12) inside the tubular body (5) and above the tubular body (5).
In this case, the outer peripheral surface of the ring (6) is
Since it is formed in (a) and has a draft angle, it can be easily pulled out and the safety handrail can be easily removed.

Further, with the support (3) of the temporary safety handrail (1) supported by the tubular body (5) via the ring (6), the support lower end (3a) has an inclined protrusion (3). 10), the lower end of the ring (6a) is enlarged in diameter, and the gap between the outer peripheral surface and the inner peripheral surface of the cylindrical body (5) is reduced. The outer peripheral surface (7a) is fixed at the upper end position of the cylindrical body (5), and the movement of the lower end of the ring (6a) and the lower end of the column (3a) is restricted by the inner peripheral surface of the cylindrical body (5). Thus, the ring 6 can be reliably supported by the tubular body 5 in a state where the ring 6 has not fallen, and the temporary handrail (1) can be stably supported by eliminating the movement of the lower end portion (3a) of the column.

According to the second aspect of the present invention, the thickness of the inclined protruding portion (10) is such that the outer peripheral surface of the lower end portion (6a) of the ring is formed by the fitting of the lower end portion (3a) of the column. Since the ring (6) is set so as to be pressed against the inner periphery of (5), the ring (6) is pressed and fixed to the cylindrical body (5) at the position of the upper end of the cylindrical body (5) and the position of the lower end of the ring (6a). Since the lower end of the support (3a) is completely fixed to the cylindrical body (5) via the ring (6), the temporary handrail
(1) can be mounted in a very stable state.

According to the third aspect of the present invention, the intermediate portion of the ring (6) (the portion of the inner peripheral surface (8b) in the embodiment).
The tapered inner peripheral surface (8a), whose diameter increases toward the upper end, is formed between the lower end and the upper end, so that the lower end portion (3a) of the strut can be easily and smoothly fitted into the ring (6), The support (3) can be stably supported.

[Brief description of the drawings]

FIG. 1 is an exploded front view of a temporary safety handrail and a mounting device thereof according to an embodiment of the present invention.

FIG. 2 is a front view of the ring of the embodiment, with a right half thereof being longitudinally sectioned from a center line.

FIG. 3 is a bottom view of the ring according to the embodiment.

4A and 4B show a use state of the embodiment, in which FIG. 4A is a longitudinal sectional front view in which a ring is press-fitted and fixed to a cylindrical body and a column is inserted, and FIG. 4B is a state in which a concrete slab is cast. (C) is a longitudinal sectional front view showing a finished state of a pillar extraction trace.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Temporary safety handrail 3 Post 3a Post lower end 5 Cylindrical body 6 Ring 6a Ring lower end 7a Cone-shaped outer peripheral surface 8a Tapered inner peripheral surface 8b Cylindrical inner peripheral surface 9 Slit 10 Inclined protrusion 11 Steel beam etc. 13 Concrete slab surface

Claims (3)

(57) [Claims] 1. A cylindrical body (5) vertically fixed to a steel beam or the like (11) has a cone-shaped outer peripheral surface (7a) in which at least the upper outer peripheral surface becomes larger in diameter toward the upper end. A ring (6) presses the cone-shaped outer peripheral surface (7a) against the inner periphery of the upper end of the tubular body (5) and has an upper end from the concrete slab surface (13) above the tubular body (5). fixedly inserted to protrude upward, this ring (6), an intermediate portion of the inner diameter pillar lower end of temporary safety handrail (1) (3a) is fitted in just the intermediate
The lower end of the ring (6a), whose diameter can be expanded by a slit (9) with the lower end open at the lower end of the ring, and the temporary safety handrail (1) inserted into the ring (6). inclined protrusion (10) and is formed, mounting system of temporary safety handrail for causing the diameter the ring lower end portion (6a) by the post lower section (3a). The inclined projection (10) is formed to a thickness such that the outer peripheral surface of the lower end of the ring (6a) is pressed against the inner periphery of the tubular body (5) by fitting the lower end of the support (3a). The mounting device for a temporary safety handrail according to claim 1, wherein: 3. The temporary installation according to claim 1, wherein the ring (6) has a tapered inner peripheral surface (8a) having a diameter increasing toward the upper end between the intermediate portion and the upper end. Safety railing mounting device.