JP2021055296A - Temporary handrail structure and construction method for temporary handrail - Google Patents

Abstract

To provide a temporary handrail structure capable of smoothly performing external wall construction and waterproof construction around a floor structure while a temporary handrail is installed, and capable of saving construction labor of workers by easily attaching/detaching the temporary handrail.SOLUTION: A temporary handrail structure 1 comprises: a floor structure 2 which is provided continuously to a building body A and faces an outdoor space; a plurality of bracing strut 3 which are erected on an outer peripheral part of the floor structure 2 at a constant interval and support a main handrail 5; and a long temporary handrail 4 detachably fixed to a side surfaces 31a of a plurality of bracing strut 3 by a steel clamp 8 and extending in the horizontal direction.SELECTED DRAWING: Figure 1

Description

The present invention relates to a temporary handrail structure in which a temporary handrail is installed on a floor structure provided facing an outdoor space during construction of a building, and a construction method thereof.

Normally, when installing waterproof materials or outer wall materials around the floor structure facing the outdoor space of the building body, such as balconies and terraces located at high places, to prevent workers from falling from the floor structure. A temporary handrail will be installed in. Since this temporary handrail is a temporary material that is installed only during the period from the start of construction around the floor structure to the installation of the main handrail, it can be easily attached and detached to save the labor of workers. Temporary handrails that can be used have been proposed (for example, Patent Document 1, Patent Document 2, and Patent Document 3).

In the invention described in Patent Document 1, the temporary handrail can be fixed to the floor structure by sandwiching the rising edge of the outer peripheral portion of the floor structure with a clamp metal fitting provided at the lower part of the support of the temporary handrail, and the clamp can also be used. The columns of the temporary handrail can be easily attached to and detached from the floor structure simply by rotating the bolts of the metal fittings. In the inventions described in Patent Documents 2 and 3, the temporary handrail can be attached by simply screwing the lower end of the support of the temporary handrail into the female screw hole formed in advance on the outer peripheral portion of the concrete floor. , Workers can easily install and disassemble temporary handrails.

Akira Jitsukai 61-67353 Actual climb 3149454 Actual Kaihei 7-32111

However, the invention described in Patent Document 1 can be used only for a floor structure having a rising edge formed on the outer peripheral portion, and the temporary handrail and its support must be removed when performing outer wall construction. .. In the inventions described in Patent Document 2 and Patent Document 3, a temporary handrail cannot be installed unless the floor structure is a concrete floor, and a mortar is provided with a female screw hole that becomes unnecessary after the temporary handrail is removed. It takes time and effort to finish the work, such as burying it in. Further, in the inventions described in Patent Documents 1 to 3, when waterproofing work is performed on the upper part of the floor structure, the support of the temporary handrail interferes with the waterproof material, so that the work must be performed unless the support is removed. In the end, workers have to perform waterproofing work in an environment where fall prevention measures cannot be taken.

Therefore, the present invention has been made in view of the above-mentioned problems, and it is possible to smoothly carry out the outer wall construction and waterproofing work around the floor structure while the temporary handrail is installed, and the temporary handrail can be easily provided. It is an object of the present invention to provide a temporary handrail structure that can be attached and detached to save the construction work of workers.

The first temporary handrail structure of the present invention is continuously provided on the building body, and is erected on the floor structure facing the outdoor space and the outer peripheral portion of the floor structure at regular intervals. It is characterized in that it is provided with a plurality of retaining columns for supporting the above, and a long temporary handrail that is detachably fixed to the side surface of the plurality of retaining columns by a steel frame clamp and extends in the horizontal direction.

The second temporary handrail structure of the present invention is characterized in that a waterproof material is installed on the upper portion of the floor structure and the lower end portion of the retaining column, and the temporary handrail is installed above the waterproof material. It is said.

In the third temporary handrail structure of the present invention, an outer wall material covering the outer peripheral side surface of the floor structure is fixed to the siding pillar, and the temporary handrail is installed above the outer wall material. It is a feature.

The construction method of the first temporary handrail structure of the present invention is the construction method of the temporary handrail structure according to any one of the first to the third, and the copy is made at regular intervals on the outer peripheral portion of the floor structure. A pillar is erected, and the temporary handrail is fixed to the first side surface of the stilt pillar on the floor structure side with the steel frame clamp, and then a waterproof material is applied to the upper part of the floor structure and the lower end of the stilt pillar. The temporary handrail and the steel frame clamp are removed from the retaining column so that the retaining column supports the main handrail.

In the second method of constructing the temporary handrail of the present invention, before removing the temporary handrail and the steel frame clamp from the retaining column, the outer wall material covering the outer peripheral side surface of the floor structure is provided with the first one of the retaining column. It is characterized by being fixed to the side surface opposite to the side surface.

In the third method of constructing the temporary handrail of the present invention, the portion of the retaining column exposed upward from the waterproof material by the cover material fixed to the retaining column after the temporary handrail and the steel frame clamp are removed. The main handrail is covered and is supported by the retaining column via the cover material.

According to the first temporary handrail structure of the present invention, since the temporary handrail is fixed to the retaining pillar for supporting the main handrail, it is not necessary to separately prepare a support for the temporary handrail, and the temporary handrail can be provided. The installation work of the main handrail after removal can be performed smoothly. Since the temporary handrail is detachably fixed to the retaining column by the steel frame clamp, the temporary handrail can be easily attached and detached, and the workability can be improved by saving the labor of the worker.

According to the second temporary handrail structure of the present invention, the temporary handrail is installed above the waterproof material installed at the upper part of the floor structure and the lower end of the retaining column, so that the temporary handrail remains installed. Even if there is, the temporary handrail does not interfere with the waterproof material, and the worker can smoothly perform the waterproof work around the floor structural material and the retaining pillar in a safe situation.

According to the third temporary handrail structure of the present invention, the outer wall material covering the outer peripheral side surface of the floor structure is fixed to the retaining column, and the temporary handrail is installed above the outer wall material, so that the floor structure It is not necessary to remove the temporary handrail when constructing the outer wall around the body, and the work efficiency of the outer wall construction can be improved.

According to the method of constructing the first temporary handrail of the present invention, the retaining pillars are erected on the outer peripheral portion of the floor structure at regular intervals, and the temporary handrails are placed on the first side surface of the retaining pillar on the floor structure side. After fixing with a steel clamp, waterproofing material will be installed on the upper part of the floor structure and the lower end of the handrail, so workers should perform waterproofing work around the floor structure and the handrail in a safe situation. Can be done. And since the temporary handrail is fixed to the retaining pillar for supporting the main handrail, there is no need to prepare a separate support for the temporary handrail as in the past, or to remove the support of the temporary handrail during the waterproofing work. In addition, the installation work of the main handrail after removing the temporary handrail can be smoothly performed, and the workability can be improved.

According to the construction method of the second temporary handrail of the present invention, after the temporary handrail is fixed to the first side surface of the stanchion, the outer wall material covering the outer peripheral side surface of the floor structure is placed on the side opposite to the first side surface of the stanchion. Since it is fixed to the side surface of the floor structure, it is possible to construct the outer wall around the floor structure without removing the temporary handrail, and the work efficiency can be improved.

According to the third method of constructing the temporary handrail of the present invention, the retaining column is covered with a cover material after removing the temporary handrail and the steel frame clamp, and the main handrail is a cover material. Since it is supported by the backing pillar via the main handrail, even if the surface of the backing pillar is scratched when attaching or detaching the temporary handrail, the scratches on the backing pillar will not be exposed after the main handrail is installed. The design of the handrail can be maintained.

A vertical sectional view showing a temporary handrail structure. Partially omitted plan view showing the temporary handrail structure. A perspective view showing a backing pillar. A vertical cross-sectional view showing a situation in which a retaining column is fixed to a beam material. Partially omitted plan view showing the situation where the stanchion is fixed to the beam material. A vertical sectional view showing a situation in which a temporary handrail is installed on a backing pillar. A vertical cross-sectional view showing the situation where the outer wall material is installed on the siding pillar. FIG. 7 is a cross-sectional view taken along line XX of FIG. (A) A vertical cross-sectional view showing a state in which waterproofing work around the floor structure is completed, and (b) a vertical cross-sectional view showing a state in which the temporary handrail is removed from the retaining column. A vertical cross-sectional view showing a state in which the main handrail is installed on a backing pillar. FIG. 10 is a cross-sectional view taken along the line YY.

Hereinafter, embodiments of the temporary handrail structure according to the present invention will be described with reference to each figure. The temporary handrail structure of the present application is a floor structure of a worker until the main handrail is installed on the outer periphery of the floor structure when constructing a floor structure such as a balcony or a terrace located mainly at a high place. It is a structure for easily installing temporary handrails to prevent them from falling from the body and not to interfere with each construction. In the present application, the "main handrail" is a handrail that is gripped and used by the user of the floor structure after all the construction around the floor structure is completed, and the "temporary handrail" is the floor structure. It refers to a handrail that is temporarily used by the workers who perform each construction until the surrounding construction is completed and the main handrail is installed.

As shown in FIGS. 1 and 2, the temporary handrail structure 1 is continuously provided on the building body A, and is spaced at regular intervals between the floor structure 2 facing the outdoor space and the outer peripheral portion of the floor structure 2. It is provided with a plurality of erection pillars 3 and a long temporary handrail 4 fixed to the stanchion pillar 3 and extending in the horizontal direction.

As shown in FIG. 1, the floor structure 2 is arranged at the outer peripheral edge, and is formed by a long beam member 21 made of H-shaped steel having upper and lower flanges 21a and web 21b, and a metal fitting (not shown). It has a thick flat plate-shaped member fixed to the material 21, for example, a long floor slab 22 formed of an extrusion-molded cement slab, a lightweight aerated concrete slab, or the like. Further, in the flange 21a of the beam member 21, a first bolt hole 21c penetrating in the plate thickness direction is formed in a portion of the upper flange 21a opposite to the floor slab 22 in accordance with the installation position of the retaining column 3. A bolt 61 for fixing the retaining column 3 can be inserted into the first bolt hole 21c.

As shown in FIGS. 1 and 3, the retaining pillar 3 is a long member extending in the vertical direction, and is a pillar material that supports the temporary handrail 4 and the main handrail 5 described later. The retaining pillar 3 is formed at the first member 31 for fixing the temporary handrail 4, the second member 32 formed at the lower end of the first member 31, and fixed to the beam member 21, and the upper end of the first member 31. It has a flat plate-shaped third member 33. The first member 31 which is long in the vertical direction is a substantially square plate-shaped member which is elongated in the depth direction when viewed from the floor slab 22 side, and is formed on the first side surface 31a which is the side surface of the floor slab 22 side. The temporary handrail 4 can be fixed. Further, a plurality of second bolt holes 31c penetrating in the plate thickness direction from the second side surface 31b side orthogonal to the first side surface 31a are formed at the lower end portion of the first member 31. The second member 32 is a flat plate-shaped member whose plate surface is directed toward the first member 31 and is arranged closer to the first side surface 31a of the first member 31, from the two second side surfaces 31b of the first member 31. Also protrudes outward, and a third bolt hole 32a penetrating in the plate thickness direction is formed in this protruding portion. The third member 33 is a member to which the cover material 7 for covering the retaining column 3, which will be described later, is fixed, and the plate surface is directed toward the first member 31, and a female screw penetrating substantially in the center in the plate thickness direction. The hole 33a is formed. The first member 31 is formed with a groove 31d extending downward from the upper end in accordance with the position of the female screw hole 33a. The distance L1 between the centers of the retaining columns 3 shown in FIG. 2 is determined by the shape of the main handrail 5 to be finally installed. For example, it is desirable that the distance is about 1000 mm or less, and such a distance. If so, the temporary handrail 4 can be safely installed.

The temporary handrail 4 shown in FIGS. 1 and 2 is installed to prevent the worker from falling from the floor structure 2 until the main handrail 5 is installed on the retaining pillar 3, and is a scaffold. It is possible to use a long single pipe used as a temporary material such as. Further, the temporary handrail 4 can be detachably fixed to the retaining column 3 by a conventionally known steel frame clamp 8, and the steel frame clamp 8 has a sandwiching portion 81 for sandwiching the first member 31 of the retaining column 3 and a temporary handrail. It has a fitting portion 82 into which the 4 is fitted. The main handrail 5 shown in FIGS. 10 and 11 is a glass surface material formed in a substantially rectangular shape, and the outer wall 9 is more than the back pillar 3 after all the outer wall construction and waterproofing work around the floor structural material 2 are completed. Both ends in the horizontal direction are held by the cover material 7 which is arranged on the side and covers the retaining column 3.

Next, the construction method of the temporary handrail structure 1 will be described. First, as shown in FIGS. 4 and 5, the retaining column 3 is fixed to the beam member 21 of the floor structure 2 supported by the column member (not shown) or the like. Specifically, each of the retaining columns 3 is arranged above the beam member 21 with the first side surface 31a of the first member 31 of the retaining column 3 facing the floor structure 2 side, and the first bolt hole of the flange 21a is provided. Align the positions of 21c with the third bolt hole 32a of the retaining column 3, insert the bolt 61, and tighten and fix it with the nut 62.

Subsequently, as shown in FIGS. 6 and 8, in a state where the fitting portion 82 of the steel frame clamp 8 is directed toward the floor structure 2 side from the retaining column 3, the steel frame clamp 8 is spaced vertically apart. A plurality of members are arranged on one member 31, and the first member 31 is sandwiched between the sandwiching portions 81 from the second side surface 31b side, and the attached bolts are tightened to fix the first member 31 to the retaining column 3. Then, the temporary handrail 4 is fitted into the fitting portion 82 of each steel frame clamp 8 and similarly tightened with the attached bolts to fix the temporary handrail 4 to the retaining column 3. At this time, as shown in FIG. 9A, the steel frame clamp 8 is arranged at a position above the outer wall material 9 and the waterproof material 10 which are later installed at the lower end of the retaining column 3. Further, in the illustrated example, two temporary handrails 4 are installed in the vertical direction, but the number of the temporary handrails 4 is not particularly limited, and may be one or three or more depending on the height of the retaining pillar 3.

After arranging the temporary handrail 4 in this way, as shown in FIGS. 7 and 8, an outer wall material 9 that covers the outer peripheral side surface of the floor structure 2 is installed. The outer wall material 9 installed around the siding pillar 3 is a member fixed to the third side surface 31e, which is the side surface opposite to the first side surface 31a of the first member 31, and has a lip channel steel in a three-sided frame shape. It is composed of an outer wall base material 91 assembled in the above and an outer wall finishing material 92 fixed to the outer wall base material 91. As shown in FIG. 8, the outer wall base material 91 is arranged between the adjacent pillars 3, and the adjacent outer wall base materials 91 are formed at the lower ends of the outer wall base material 91 and the first member 31. 2 It is connected and fixed to the retaining column 3 by a bolt 61 penetrating the bolt hole 31c. At this time, since the temporary handrail 4 is located above the outer wall material 9, it does not hinder the construction of the outer wall around the floor structure 2 and the retaining pillar 3, and the outer wall construction is smooth. Can proceed.

Next, as shown in FIG. 9A, a waterproof material 10 such as a tarpaulin 10a or a cap tree 10b is installed on the upper part of the floor structure 2 and the lower end of the retaining pillar 3 to complete the waterproofing work. Also at this time, as described above, since the temporary handrail 4 is arranged at a position above the waterproof material 10, the temporary handrail 4 and the steel frame clamp 8 do not interfere with the waterproofing work, and the worker It can be installed smoothly. Therefore, since it is not necessary to remove the temporary handrail 4 when performing waterproofing work as in the conventional case, it is possible to effectively prevent the worker from falling from the floor structural material 2 and maintain safety.

After the completion of the outer wall work and the waterproof work, the temporary handrail 4 and the steel frame clamp 8 are removed as shown in FIG. 9 (b), and the main handrail 5 and the cover material 7 are attached to the columns as shown in FIGS. 10 and 11. Install in 3. The cover material 7 includes a covering portion 71 that covers a portion exposed upward from the cap tree 10b installed at the lower end portion of the retaining pillar 3, and a holding portion 72 that fits and holds both end edges of the main handrail 5 in the horizontal direction. And, the upper end of the covering portion 71 and the third member 33 of the retaining column 3 are penetrated by the bolt 61, and the bolt 61 is screwed into the female screw hole 33a of the third member 33 to retain it. It can be fixed to the pillar 3. At this time, since the entire portion of the retaining column 3 exposed above the cap tree 10b is covered with the cover material 7, the retaining column 3 is scratched when the temporary handrail 4 or the steel frame clamp 8 is attached or detached. However, these scratches are not exposed, and the design of the main handrail around 5 can be maintained. Then, the main handrail 5 is fitted into the holding portion 72 of the cover material 7, and finally, the handrail caps 11 are installed on the main handrail 5 and the cover material 7 to complete the installation of the main handrail 5.

As described above, in the temporary handrail structure 1 of the present application, since the temporary handrail 4 is installed by using the retaining pillar 3 that supports the main handrail 5, it is not necessary to separately prepare a support for the temporary handrail 4. The installation work of the main handrail 5 after removing the temporary handrail 4 can be smoothly performed. Since the temporary handrail 4 does not become an obstacle when performing the outer wall construction and the waterproof construction as in the conventional case, the worker performs these constructions in a safe situation without removing the temporary handrail 4. be able to. Further, since the temporary handrail 4 is detachably fixed to the retaining column 3 by the steel frame clamp 8, the work efficiency can be improved by omitting the construction work of the temporary handrail 4. In the present embodiment, the second member 32 of the retaining column 3 is fixed to the flange 21a of the beam member 21, but the shapes of the retaining column 3 and the beam member 21 and the arrangement relationship between the two members are particularly limited. For example, the retaining column 3 may be fixed to the web of the beam member 21 made of C-shaped steel. Further, in the illustrated example, the floor slab 22 is a thick flat plate-shaped member, but this is also not particularly limited, and a floor slab having other configurations may be used.

The embodiment of the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the scope of the idea of the present invention.

The temporary handrail structure according to the present invention can be suitably used when constructing a balcony or terrace located at a high place.

1 Temporary handrail structure 2 Floor structure 3 Reservoir 31a 1st side surface 31c 3rd side surface (side surface opposite to the 1st side surface)
4 Temporary handrail 5 Main handrail 7 Cover material 8 Outer wall material 9 Steel clamp 10 Waterproof material A Building body

Claims (6)

A floor structure that is continuously installed in the building body and faces the outdoor space,
A plurality of retaining columns that are erected on the outer peripheral portion of the floor structure at regular intervals and support the main handrail,
A temporary handrail structure including a long temporary handrail that is detachably fixed to the side surface of the plurality of retaining columns by a steel frame clamp and extends in the horizontal direction. Waterproofing materials are installed on the upper part of the floor structure and the lower end of the retaining column.
The temporary handrail structure according to claim 1, wherein the temporary handrail is installed above the waterproof material. An outer wall material covering the outer peripheral side surface of the floor structure is fixed to the siding column.
The temporary handrail structure according to claim 1 or 2, wherein the temporary handrail is installed above the outer wall material. The method for constructing a temporary handrail structure according to any one of claims 1 to 3.
The retaining pillars are erected on the outer peripheral portion of the floor structure at regular intervals.
After fixing the temporary handrail to the first side surface, which is the side surface of the retaining column on the floor structure side, with the steel frame clamp,
A waterproof material is installed on the upper part of the floor structure and the lower end of the retaining column.
A method for constructing a temporary handrail, which comprises removing the temporary handrail and the steel frame clamp from the retaining column and causing the retaining column to support the main handrail. Before removing the temporary handrail and the steel clamp from the retaining column,
The method for constructing a temporary handrail according to claim 4, wherein the outer wall material covering the outer peripheral side surface of the floor structure is fixed to the side surface of the retaining column opposite to the first side surface. After removing the temporary handrail and the steel frame clamp, the retaining column is covered with a cover material fixed to the retaining column so as to be exposed upward from the waterproof material.
The method for constructing a temporary handrail according to claim 4 or 5, wherein the main handrail is supported by the retaining pillar via the cover material.

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