JPH0598800A - Anchoring of handrail for opening curing and its fixture - Google Patents

Abstract

PURPOSE:To increase safety of fitting works of handrails in an opening curing. CONSTITUTION:A setting piece 5 is provided at the upper end of an insert 7 and fixed at a mold 3 so that the insert 7 turns upward. And then, concrete is placed and the handrail 11 is connected to the insert 7. The joint metal 17 of the insert 7 and the handrail 11 is constituted by jointing a protruded piece 15 fitted to a handrail pipe 11 at the upper end of a bolt 9 or the like. The setting piece 5 bent to form an L-shape in time section is easily handled. Since the bending stress of the protruded piece 15 is received on the concrete face, if a collar 13 is provided at the bottom edge of protruded piece 15, the strength is increased.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anchor construction method for a handrail for opening curing when constructing a concrete structure and a metal fitting used for the construction.

[0002]

2. Description of the Related Art A conventional handrail for opening and curing a concrete structure has a through hole formed at regular intervals at the bottom or lower side surface of a single pipe after the concrete is set and cured. Providing two plate-shaped metal parts that sandwich the concrete end, one of which is applied to one side of the concrete,
The other one was engaged and supported in the through hole so as to come into contact with the other side surface of the concrete, and the lower part of the single pipe was clamped and fixed by these two plate-shaped metal pieces. Needless to say, the single pipe may be chevron steel, etc. In this way, another single pipe was installed so as to connect the single pipes clamped and fixed to the concrete portion forming the opening, thus forming the handrail. ..

[0003]

Therefore, when the conventional handrail for opening curing is mounted and constructed, it is necessary to lean out toward the opening side, and the same risk is involved when removing the handrail. It was Further, since the concrete part is mounted after it has a certain strength, it is impossible to mount the handrail for curing at the time of placing the concrete.

The present invention has been made in view of the above circumstances, and an object thereof is to provide an anchor construction method for a handrail for opening curing and a metal fitting thereof that can be safely installed and removed during and after concrete pouring. It is in.

[0005]

In order to achieve the above object, the anchoring method of the handrail for opening curing of the present invention prepares an insert to which a stopper for engaging with a mold is connected in advance, and the opening is opened. The stopper is fixed so that the insert faces upward inside the concrete formwork to be formed, and the insert surface is closed with gum tape or the like, and after placing concrete, a metal fitting with a handrail for curing is attached to the insert. I tried to connect. A flange is provided at the bottom end of the projecting body of the metal fitting to evenly contact the concrete surface, and a metal fitting having an L-shaped vertical cross section is welded to the upper end of the stopper of the insert. Further, the metal fitting is formed by joining a round bar steel with a screw that is screwed and fastened to an insert attached to the concrete at the opening, one end of a bolt, etc. I was able to connect.

[0006]

When the insert is directed upward and the stopper is fixed to the mold side, the insert can be supported in the mold. If the stopper has an L-shaped cross-section welded to the upper end of the insert, the vertical side of the stopper can be fixed to the vertical surface of the mold to hold the insert vertically as well. By closing the insert surface and placing concrete in this way, the placed concrete and insert can be integrated in advance, and a single pipe or the like can be connected to the insert at any time to attach the handrail hardware from the inside of the opening. It is a thing. After placing the concrete, the insert is attached to the concrete, and the round bar steel with screws, bolts, etc., to which the protruding body is joined, is screwed onto the insert. After that, a single pipe for handrails may be connected to the projecting body. Bending stress to the round bar steel with screws and bolts can be released to the concrete pouring side by the flange at the bottom end of the projecting body.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 shows a perspective view of the opening side end of the floor slab 1. At this end, a stop form 3 for the floor slab 1 is provided. The floor slab 1 is formed by pouring and curing concrete in the formwork 3. Before the concrete is placed, the fastener 5 is fixed to the formwork 3 and the insert 5 is supported by the fastener 5. Let The stopper 5 is formed by bending an iron plate for leveling out into an L-shape and fixing it to the insertion surface of the ceiling insert 7 by welding. This is determined so that the ceiling insert 7 faces upward inside the form 3, and is vertically fixed to the form 3 with a nail or the like. After that, the surface of the insert 7 is closed with gum tape or the like, concrete is poured into the mold 3, and after curing, a long bolt 9 is screwed to the insert 7 as shown in FIG. A single pipe handrail 11 is attached to the long bolt 9. When the L-shaped stopper 5 described in the present embodiment is used, the insert 7 can be easily held vertically, but the stopper may be a flat iron plate. In this case, the flat iron plate is used as the form 3 It will be stopped from the edge of.

FIGS. 3 and 4 show the case where the single pipe handrail 11 is connected to the open end of the already placed floor slab 1. The ceiling insert 7 is driven into the end of the floor slab 1, and the connection fitting 17 in which the protrusion 15 with the collar 13 is welded is screwed into the upper end of the bolt. Screw the collar 13 until it touches the upper end surface of the insert 7. Then, the single pipe handrail 1 is attached to the projecting body 15.
1 may be fitted, and the single pipe handrail 11 may be provided with a handrail cross member.

[0009]

As described in detail above, according to the anchor construction method of the handrail for opening curing and the metal fitting thereof according to the present invention,
Fix the insert to the mold with the stopper with the insert connected to the stopper for locking to the mold facing upwards,
After that, concrete is poured and the handrail is connected to this insert, so that it is not necessary to lean outside the opening, and the work safety is improved. Further, there is an effect that the opening curing handrail can be attached without disassembling the formwork.
Furthermore, since the handrail is not clamped at the opening end portion as compared with the conventional one, the handrail may be left until the latter stage of the finishing work, and the work safety is greatly improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a side view showing a state where a single pipe handrail is connected thereto.

FIG. 3 is a cross-sectional view showing another embodiment.

FIG. 4 is a cross-sectional view of a connection fitting that connects an insert and a handrail for curing.

[Explanation of symbols]

 1 Floor slab 3 Formwork 5 Stopper 7 Insert 9 Long bolt 11 Single pipe handrail 13 Tsuba 15 Projecting body 17 Connection fitting

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI Technical display area E04H 17/22 9128-2E

Claims (4)

[Claims] 1. An insert, to which a stopper for connecting to a mold is connected in advance, is prepared, and the stopper is fixed inside the concrete mold forming an opening so that the insert faces upward, Further, the surface of the insert is closed with gum tape or the like, concrete is poured, and then a fitting for handrail for curing is connected to the insert. 2. An anchor construction method for a handrail for opening curing, wherein the stopper of claim 1 is formed by welding a metal fitting having an L-shaped vertical section to the upper end portion of the insert. 3. The insert and the single pipe are joined to one end of a round steel bar with a screw and a bolt or the like that is screwed and fastened to the insert attached to the concrete of the opening, and a projecting body capable of fitting the single pipe in the coaxial direction. Anchor metal fittings for opening curing handrails, which are characterized in that they can be connected. 4. The metal fitting for an anchoring method for an opening curing handrail according to claim 3, wherein a flange that evenly contacts the concrete surface is provided at a bottom end portion of the projecting body.