JP3002859B2 - Handrail mounting method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of attaching a handrail to retrofit a handrail to a veranda or a roof of a building constructed of concrete.

[0002]

2. Description of the Related Art As is well known, when a handrail is installed on a veranda, a roof, or the like of a building constructed by casting concrete, an anchor member is embedded in advance before the concrete is cast. It is a general attachment method to fix the support of the handrail to the anchor member. On the other hand, when retrofitting a handrail to an existing building, a necessary portion of the concrete was cut off, the reinforcing bar was exposed, and an anchor member was welded to the reinforcing bar. In addition, as a means of retrofitting a handrail to an existing building without cutting concrete, fixing holes are opened at predetermined intervals at the installation location, and a cylinder is fixed to this fixing hole with adhesive, and this cylinder is fixed. The handrail is installed by inserting a handrail post into the material.
No. 9 and other publications.

[0003]

However, when welding an anchor member, it is difficult to confirm the position of the support of the handrail, and a welding operation is required. Furthermore, the timing at which construction is possible is limited, and the construction period is short, and if it is delayed, subsequent processes (for example, mortar filling, ironing down, spraying of spraying material, etc.)
Had been affected. Further, in the handrail which is installed by using the above-mentioned tubular material, a special tool such as a diamond tool is required when opening the fixing hole because the fixing hole has a large diameter. Further, in the completed handrail, stress is concentrated on the root of the column, that is, on the cylindrical member, so that the concrete is easily damaged in the radial direction. Furthermore,
Since the stress is concentrated on the tubular member, the tubular member is hollow and easily buckled, and the handrail is easily deformed or broken, resulting in poor reliability. In addition, the cost is high due to the large amount of expensive adhesive filling. The present invention has been proposed in view of the above, can be easily installed in an existing building,
An object of the present invention is to provide an inexpensive and safe handrail mounting method.

[0004]

In order to achieve the above object, according to the first aspect of the present invention, there is provided a process of inking a concrete body and drilling a mounting hole with a hammer drill, and filling the mounting hole with a filler. Injected and embedded material and angled steel
A step of inserting the embedded member side of the connection fitting formed by welding the connection member formed in the mounting hole into the mounting hole and hardening, and erecting the connection fitting in the concrete skeleton, on the connection member side of the standing connection fitting, Attaching a handrail main body having a hollow support having a fitting hole, and attaching the handrail main body to a concrete skeleton by combining the above steps. It is. According to the invention described in claim 2, the ink is printed on the concrete body and is hammer drilled.
The process of drilling the mounting holes, filling the mounting holes with filler and filling
The connecting member made of flat steel material
Insert the embedded member side of the connecting bracket into the mounting hole and cure it.
And erecting the connecting bracket on the concrete skeleton,
A hollow with a fitting hole on the connecting member side of the upright connecting fitting
Attaching a handrail body having a columnar support,
Combine the above steps to make the handrail body a concrete body
This is a method for attaching handrails, which is to be retrofitted . According to the third aspect of the present invention, the concrete body is marked with ink.
And drilling a mounting hole with a hammer drill.
Is filled with a filling material, and it is formed by an embedding member and a square tubular steel
With the embedded member side of the connecting bracket welded to the connecting member
Insert it into the mounting hole and cure it.
The process of erecting on the skeleton and the connecting member of the erecting connection fitting
On the side, a handrail body with a hollow support having a fitting hole
Attaching, and combining the above steps to form a handrail.
A method for attaching a handrail, characterized by attaching a main body to a concrete frame later . Invention, co according to claim 4
Ink on the concrete body and use a hammer drill to drill the mounting holes.
Drilling process, filling material into the mounting hole,
A joint formed by welding a connecting member made of cylindrical steel
Insert the embedding member side of the metal fitting into the mounting hole and cure it,
The process of erecting the connection fitting on the concrete frame and the erecting
On the connecting member side of the connecting metal fitting, a hollow
Applying a handrail body having a support, and
Combine each process and retrofit the handrail body to the concrete body
Only a mounting method of the handrail, characterized by.

[0005]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view showing a handrail mounting structure according to the present invention. In the drawings, left and right separate embodiments are shown.

In the method of attaching a handrail according to the present invention, a mounting hole 2 is opened in a concrete skeleton 1 of a building, one end of which can be inserted into the mounting hole 2 of the skeleton 1 and the other end of which is described later. A connecting metal fitting 3 that can be fitted into the fitting hole 42 of the support post 41 is mounted in the mounting hole 2, and the handrail body 4 having the fitting hole 42 in the connecting metal fitting 3 and having the hollow support 41 is provided. It is to adhere.

The concrete skeleton 1 is, for example, an outer edge rising portion 12 of a floor portion 11 of a veranda. Therefore, the mounting hole 2 is formed on the upper end surface of the rising portion 12. At this time, the diameter of the mounting hole 22 may be about 20 to 22 mm, as long as it is possible to insert the connecting fitting 3 described later. Further, the depth may be about 80 mm. Therefore, it can be drilled using a hammer drill, and there is no need to use a special machine tool such as a core boring machine. When opening the mounting hole 2, be careful not to cut the reinforcing bars provided on the floor 11.
Alternatively, it is good to consider the interval so as not to interfere.
Then, when there is a risk of cutting the reinforcing bar, the position of the mounting hole may be set to the position indicated by the broken line in FIG. 1 so that the inside and outside of the connection fitting 3 described later are reversed.

The connecting fitting 3 inserted into the mounting hole 2 as described above is formed by welding a solid bar-shaped steel material forming an embedded member and the connecting fitting. In the embodiment shown in FIG. 2, for example, a deformed reinforcing bar 31 having a diameter of about 16 mm and a length of about 120 mm as an embedding member, and a steel plate having a thickness of about 3.2 mm as a connecting member are bent into a C shape of about 28 × 40 mm. It is formed by welding the angle-shaped steel material 32. In addition, the length of the angle-shaped steel material 32 is about 300 mm,
The total length of the welded connection fitting 3 is about 380 mm.

In the same manner as described above, the connecting fitting 3 in FIG. 3 is formed by a deformed reinforcing bar 31 as an embedding member and an L-shaped angled steel material 32 of about 28 × 40 mm as a connecting member. are doing. On the other hand, the connection fitting 3 in FIG.
The tip of the angle-shaped steel material 32 bent to a certain degree is welded to the peripheral surface of the deformed reinforcing bar 31 as described above. That is,
The deformed reinforcing bar 31 and the angled steel material 32 do not overlap.

[0010] Further, in FIG.
A deformed reinforcing bar 31 of about 6 mm and a connecting member of 16 × 2
The connecting bracket 3 is formed by welding a flat steel 33 of about 2 mm. In this embodiment, a loose hole 34 is previously formed in the flat steel 33 by factory processing so that the screw 5 for fixing the column 41 can be easily fastened.

On the other hand, in the embodiment shown in FIG.
As shown in the cross-sectional view, a deformed reinforcing bar 31 of about 16 mm is used as an embedding member, and 38 × 2 is used as a connecting member.
The connection fitting 3 is formed by welding a square cylindrical steel material 35 of about 8 mm through welding holes formed on both side surfaces of one corner. That is, the deformed reinforcing bar 31 and the rectangular tubular steel material 35 are integrated at the plug welding portion 61. In this embodiment, as shown in the side view of the main part of (B), a lower cover member 44 is provided to cover a lower portion of a pillar 41 described later.

In the embodiment shown in FIG. 7, a base plate 7 is added to the connection fitting 3 formed in the same manner as in FIG. That is, the substantially rectangular base plate 7 having the deformed reinforcing bar 31 penetrated is welded to the lower end surface of the rectangular tubular steel material 35 and is brought into contact with the concrete top end 13. According to such a configuration, buckling can be prevented with respect to a larger load, and the appearance can be improved in cooperation with the lower cover member 44 without depending on the finishing state of the concrete top end 13. Handrails can be provided.

In the embodiment shown in FIG. 8, a deformed reinforcing bar 31 having a diameter of about 16 mm is used as an embedding member, and a cylindrical steel member 36 having a diameter of about 32 mm is used as a connecting member. The connection fitting 3 is formed by welding via a plug welding portion 61 on the surface.

In the embodiment shown in FIGS. 6 to 8, the same components as those in the embodiment shown in FIGS. 1 to 5 are denoted by the same reference numerals, and description thereof is omitted.

The handrail main body 4 to be attached to the connecting fitting 3 having the above-described configuration has struts 41 arranged at predetermined intervals, and the struts 41 are hollow having a fitting hole 42 that opens downward. It is. 2, 3, 6, and 7 are provided with screw grooves 43 at four corners that can be used when attaching a coping or the like. 4, 5 and 8.
Has a thread groove 43 provided slightly above the center of the side surface and the inner and outer surfaces. Such a support 41 is
For example, it can be formed by extrusion of aluminum. The support 41 is a rectangular tube having a side of about 45 mm.

Next, a method for attaching a handrail according to the present invention using the above members will be described. First, using a hammer drill, a mounting hole 2 having a predetermined diameter is formed at a predetermined depth in a vertical direction at a predetermined position on an upper end surface of a rising portion 12 made of concrete.

After sufficiently cleaning the mounting hole 2 formed as described above, a filler is injected into the mounting hole 2. As this filler, for example, a modified epoxy acrylate resin can be employed. This filler has high tensile strength and long-term durability.

Then, while the filler is in an uncured state, a deformed reinforcing bar 31 which is an embedding member of the connection fitting 3 is inserted into the mounting hole 2 so that a small amount of the filler overflows and the connection fitting 3 is completely adhered. . Further, the connecting fitting 3 is set up vertically using a level or the like, and the filler is cured while maintaining this upright state.

When the filler is sufficiently hardened and the connection fitting 3 is fixed vertically to the rising portion 12, the handrail main body 4 is attached to the connection fitting 3 in the same manner as a conventional handrail is attached. That is, the angle-shaped steel material 32 or the like, which is a connecting member of the connection fitting 3, is inserted into the fitting hole 42 of the support column 41 of the handrail main body 4. This state is shown in the sectional views of FIG. 2 to FIG. 5 and the sectional views of FIG. 6 to FIG. Note that the connection fitting 3 and the support 41 of the handrail body 4 may be fixed with a tapping screw 5 or the like as necessary.

Although not shown in the illustrated embodiment, if the support column 41 is formed so as to be slidable with respect to the horizontal rail of the handrail main body 4, the mounting error can be easily absorbed.

According to the handrail mounting method according to the present invention as described above, a commercially available inexpensive material can be applied to the connection fitting 3. The combination of the connecting member and the embedding member, which are unlikely to cause buckling, can increase the section modulus, generate a pulling force on the embedding member with the lower surface corner of the connecting member as a fulcrum, and furthermore, local bending. The load is hardly generated. Also,
This is effective for shortening the construction period and cost. In addition, it is possible to secure a sufficient strength and to provide a safe handrail mounting method that clears various standards and restrictions.

According to the present invention as described above, not only is the welding of the anchor unnecessary, but also the position confirmation and the drilling work are easy, and there is no need to cut the reinforcing bars. Also,
Since no skill is required, it can be easily carried out by ordinary workers, and the construction period is long (independent of the finishing process). Further, the amount of the filler used for fixing the connection fitting is small. In addition, a normal hammer drill can be used without using a special tool for drilling.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the above-described embodiments, and can be appropriately implemented unless the configuration described in the claims is changed. . For example, although a deformed reinforcing bar is assumed as the solid bar-shaped steel material forming the embedding member, a round bar, a screw bar, or a square bar may be used, though not shown. However, in the latter case, care must be taken when implementing the latter, since the pull-out force as an anchor is lower than that of deformed reinforcing bars.

[0024]

In summary, according to the present invention, there is provided a process of inking a concrete body to form a mounting hole with a hammer drill, injecting a filler into the mounting hole, and forming an embedded member and an angled steel.
Formed of steel, flat steel, square tubular steel, or cylindrical steel
A step of inserting the embedded member side of the connection fitting formed by welding the connected connection member into the mounting hole to harden the connection fitting and standing the connection fitting on the concrete skeleton, and fitting the connection fitting to the connection member side of the standing connection fitting. A step of attaching a handrail main body having a hollow support having a hole, and comprising the above steps, when opening a mounting hole in the concrete skeleton, a special tool is not required, No skill is required. In addition, since an inexpensive off-the-shelf commercially available product can be used as the connection fitting, not only is it advantageous in terms of cost, but also it is possible to greatly reduce the number of work steps and the construction period. And
Sufficient strength can be ensured, buckling hardly occurs even when a load is applied to the handrail, and cracks hardly occur in the concrete frame. Therefore, it is a safe retrofitting method for handrails that can clear various standards and restrictions.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a main part for explaining a handrail mounting method according to the present invention.

FIG. 2 is a cross-sectional view showing a state in which a handrail main body is attached to a connection fitting.

FIG. 3 is a cross-sectional view of a state in which a handrail main body is attached to another connection fitting.

FIG. 4 is a cross-sectional view of a state in which the handrail main body is attached to another connecting fitting.

FIG. 5 is a cross-sectional view of a state in which the handrail main body is attached to another connection fitting.

6A and 6B show another embodiment of the connection fitting, wherein FIG. 6A is a cross-sectional view of a state in which a handrail body is attached to the connection fitting, and FIG. 6B is a side view of a main part.

FIGS. 7A and 7B show another embodiment of the connection fitting, in which FIG. 7A is a cross-sectional view of a state in which the handrail body is attached to the connection fitting, and FIG.

8A and 8B show another embodiment of the connection fitting, wherein FIG. 8A is a cross-sectional view of a state in which the handrail body is attached to the connection fitting, and FIG. 8B is a side view of a main part.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Concrete skeleton 2 Mounting hole 3 Connecting metal fitting 4 Handrail main body 5 Screw 31 Deformed bar as an embedding member 32 Angle-shaped steel material as a connecting member 33 Flat steel as a connecting member 35 Square tubular steel material as a connecting member 36 As a connecting member Cylindrical steel material 41 support column 42 fitting hole 43 screw groove 61 plug welded part

Claims (4)

(57) [Claims] 1. A process of inking a concrete body and drilling a mounting hole with a hammer drill, injecting a filler into the mounting hole, and filling the mounting member and the angle-shaped steel material.
A step of inserting the embedded member side of the connection fitting formed by welding the connecting member formed above into the mounting hole and hardening, and erecting the connection fitting in the concrete skeleton; Attaching a handrail body having a hollow support having a fitting hole, and attaching the handrail body to a concrete body by combining the above steps. . 2. A hammer for inking a concrete body.
Process of drilling mounting holes with a drill, filling material into the mounting holes, forming with embedded members and flat steel
The embedded member side of the connection fitting formed by welding the connecting member
Insert it into the mounting hole and cure it.
G. The process of erecting on the skeleton, and having a fitting hole on the connection member side of the
Attaching a handrail main body having a pillar-like shape, and combining the above steps to convert the handrail main body into a concrete frame.
Handrail mounting method characterized by retrofitting . 3. A hammer for inking a concrete body.
The process of drilling a mounting hole with a drill, filling material into the mounting hole, and using an embedded member and square tubular steel
Embedding member of connecting fitting formed by welding formed connecting member
Side into the mounting holes above and harden, and
The process of erecting on the REIT frame , and having a fitting hole on the connecting member side of
Attaching a handrail main body having a pillar-like shape, and combining the above steps to convert the handrail main body into a concrete frame.
Handrail mounting method characterized by retrofitting . 4. A hammer for inking a concrete body.
A step of drilling the mounting holes in the drill, injecting a filler material into the mounting hole, the embedded members and the cylindrical steel member
Embedding member of connecting fitting formed by welding formed connecting member
Side into the mounting holes above and harden, and
The process of erecting on the REIT frame , and having a fitting hole on the connecting member side of
Attaching a handrail main body having a pillar-like shape, and combining the above steps to convert the handrail main body into a concrete frame.
Handrail mounting method characterized by retrofitting .