JP3084349B2 - Slab opening curing bar - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slab opening reinforcing bar for filling a reinforced concrete structure floor plate with a reinforced concrete at the time of completion of construction.

[0002]

2. Description of the Related Art When constructing a reinforced concrete building, in order to perform various types of work under the floor, there is a case where a hole for construction called a "usehole" is formed in a slab of a reinforced concrete structure. is there.

In order to form such a construction hole, a formwork is installed in the form of a construction hole without forming a reinforcing bar for a floor plate in a portion to be the construction hole. Concrete is poured around.

[0004] During the construction, the opening of the construction hole is closed with an iron plate or the like, and it is opened when necessary. At the end of the construction, a steel bar is set in the construction hole and concrete is poured to fill the hole. .

[0005]

However, in the above-mentioned process, a steel bar is laid on the floor plate and concrete is struck, and then the steel bar must be laid only on the hole for the construction work. It is.

[0006] Since the reinforcing steel that is stretched in the hole for construction is not bonded to the concrete that has been initially struck on the main body of the floorboard, it is inevitable that the strength of the portion in which the hole for construction is filled is reduced. .

Also, in order to form a construction hole, a formwork having the shape of the construction hole must be arranged at the time of the first concrete pouring, and the formwork must be removed after the concrete is cast. The construction is also troublesome in point.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a slab-opening reinforcing steel which can form and fill a hole for construction in a simple process, and can obtain excellent strength in the filled portion.

[0009]

In order to achieve the above-mentioned object, the present invention provides a cured slab opening reinforcing bar according to the present invention, which fills a construction hole formed in a floor plate of a reinforced concrete structure with reinforced concrete at the end of construction. A first parallel member installed in the construction hole and arranged substantially straight in parallel as viewed from the opening side of the hole;
One or a plurality of first movable rebars, both ends of which are slidably engaged with the first parallel member, and the first movable rebar installed in the construction hole and viewed from the opening side of the hole. A second, substantially straight, parallel arrangement in a direction different from the parallel member;
And a moving range in which both ends are slidably engaged with the second parallel member and overlap with the moving range of the first moving rebar when viewed from the opening side of the construction hole. A book or a plurality of second moving rebars is provided.

The first moving reinforcing bar slides at both ends thereof with respect to the first parallel member, and the second moving reinforcing bar slides at both ends thereof with respect to the second parallel member. The moving range of the two rebars overlaps when viewed from the opening side of the construction hole.

[0011] Therefore, by setting the slab opening curing steel in the construction hole and moving both movable reinforcements, when necessary for construction, the two movable reinforcements are slid to the end to open a hole, and concrete is inserted into the construction hole. When pouring and filling, both moving rebars can be arranged at equal intervals.

The first and second parallel members may be rebars, and at least one extension of the rebars may be formed with an anchor projecting outside the construction hole. .

Further, the parallel member is a plate-like member,
The base of the anchor member protruding outside the construction hole may be connected to each of the plate members, and the anchor member protrudes laterally from the plate members at appropriate intervals. A plurality of anchor members may be connected to each plate member.

In addition, a plurality of rebars, which are arranged on the inner peripheral surface of the construction hole when the concrete is poured on the floorboard and function as a formwork, are connected to the first and second parallel members. A hook portion protruding outside the construction hole may be formed so as to protrude from the reinforcing bar functioning as the formwork.

[0015]

Embodiments will be described with reference to the drawings. Fig. 1 shows a first embodiment of a slab opening curing reinforcing bar for filling a hole for construction formed in a floor plate of a reinforced concrete structure with reinforced concrete at the time of completion of construction, and a concrete plate is provided on an outer peripheral portion thereof. A plurality of rebars 1... (Hereinafter referred to as “form rebars 1”) which are arranged on the inner peripheral surface of the construction hole when flowing and function as a formwork are arranged.

As shown in FIG. 2, a pair of U-shaped rebars are formed by welding a pair of U-shaped rebars to each other at their open ends to form a rectangular ring. It is formed by stacking a plurality of reinforcing bars (for example, 5 to 6 stages).

Since only the central welded portion of each of the form reinforcing bars 1 is partially overlapped with each other vertically, in the other portions, a gap of one reinforcing bar is provided between the form reinforcing bars 1. Are formed.

As shown in FIG. 1, each form reinforcing bar 1 is fixed by welding to column reinforcing bars 2 standing at four corners. Note that the tops of the column reinforcing bars 2 project slightly upward from the top frame reinforcing bar 1.

Reference numeral 3 denotes a first parallel reinforcing bar installed in the construction hole and arranged substantially straight in a parallel and parallel manner when viewed from the opening side (upper side) of the hole. And projecting outward from the gap between the two form-bar reinforcements 1, 1 arranged above, and are welded to the column reinforcement 2 there.

A portion extending further outward from the welded portion is an anchor portion 4 which is connected to the concrete when the floor plate is driven into concrete. The anchor portion 4 is connected to the concrete of the floor plate to form the first portion. The parallel reinforcing bar 3 is strongly integrated with the floor plate.

The first movable reinforcing bar 5 arranged at a right angle to the first parallel reinforcing bar 3 has both ends bent in a J-shape, and the portion loosens the first parallel reinforcing bar 3. It is arranged to surround. FIG. 3 shows the first parallel reinforcing bar 3 and the first parallel reinforcing bar 3.
Only the moving rebar 5 is hatched.

Accordingly, both ends of the first movable reinforcing bar 5 are slidably engaged with the first parallel reinforcing bar 3.
3 can be freely slid along the first parallel reinforcing bar 3 in the direction of arrow A in FIG. In the present embodiment, eight first movable rebars 5 are provided, but any number of one or more may be set according to the size of a construction hole or the like.

Returning to FIG. 1, reference numeral 6 denotes a second parallel reinforcing bar installed in the construction hole and arranged at right angles to the first parallel reinforcing bar 3 when viewed from the opening side of the hole. Formwork reinforcement 1
Are protruded outward from the gap between the two form reinforcing bars 1 and 1 disposed below, and are welded to the column reinforcing bars 2. The extended portion is also the anchor portion 4.

The second movable reinforcing bar 7 arranged at a right angle to the second parallel reinforcing bar 6 has both ends bent in a J-shape, similarly to the first moving reinforcing bar 5, and the portion is bent. It is arranged so as to loosely surround the second parallel reinforcing bar 6. In FIG. 4, only the second parallel reinforcing bar 6 and the second moving reinforcing bar 7 are hatched.

Therefore, both ends of the second movable reinforcing bar 7 are slidably engaged with the second parallel reinforcing bar 6,
It is possible to slide freely along the second parallel reinforcing bar 6 in the direction of arrow B in FIG. In this embodiment, four second movable rebars 7 are provided, but one or more second movable rebars 7 may be set according to the size of a construction hole or the like.

Although the anchor portion 4 is bent in a J-shape in this embodiment, it may be straight.
Or you may form in other various shapes. Further, the first and second parallel reinforcing bars 3, 6 may be single wires or stranded wires.

In this manner, the first and second movable reinforcing bars 5 and 7 can be freely slid in the right angle direction in almost the entire area inside the form reinforcing bar 1. Therefore, when the first and second movable reinforcing bars 5 and 7 are both moved outward, a large opening is formed in the formwork reinforcing bar 1 as shown in FIG.

The slab-opening curing steel bar configured as described above is installed in a portion where a construction hole is formed when concrete is cast on a floor plate. And formwork reinforcement 1 becomes a formwork for forming a hole for construction.

Then, when concrete is hit on the floor plate, the anchor portions 4 projecting outside the form reinforcing bar 1 are connected to the concrete of the floor plate, and the parallel reinforcing bars 3 and 6 are strongly integrated with the floor plate. Excellent strength can be obtained in the fixed state of No. 6. Since no concrete flows into the inside of the form reinforcing bar 1, a construction hole is formed there.

Then, by sliding the movable reinforcing bars 5 and 7, when necessary for construction, the moving movable bars 5 and 7 are slid to the ends to make holes, and when the construction is completed, concrete is filled in the construction holes. When pouring and filling, both movable reinforcing bars 5 and 7 can be arranged at equal intervals so as to be suitable for concrete driving. At that time, the formwork reinforcing bar 1 is embedded together in the construction hole.

When there is no construction using the construction hole, as shown in FIG. 6, a curing lid 10 may be placed on the form reinforcing bar 1, and the upper end of the column reinforcing bar 2 may be closed. Since it protrudes from the upper end of the formwork reinforcing bar 1,
Oa is engaged with the support rebar 2, and the displacement of the curing lid 10 can be prevented.

FIGS. 7 to 10 show a second embodiment of the present invention. FIG. 7 is a plan view of a slab opening reinforcing bar, and FIG. 8 is a front sectional view thereof. However, FIG. 8 is drawn vertically longer than it is for easy understanding.

The feature of this embodiment is that both ends of the first and second movable reinforcing bars 15, 17 are slidably supported by, for example, the first and second parallel plates 13, formed of an iron plate. 16 and four parallel iron plates 13, 16 corresponding to the slab reinforcing bars 100, which are meshed at predetermined intervals in the concrete of the floorboard.
Are protruded from each outer surface.

As shown also in the perspective view of FIG. 9, the first parallel iron plate 13 is arranged upright in a horizontally long direction, so that one end of the first movable reinforcing bar 15 is slidably engaged. Groove 18 is formed in the horizontal direction.

From the first parallel iron plate 13, five anchor reinforcing bars 14 are provided in each of two upper and lower rows, and slab reinforcing bars 100.
Are projected outward so as to correspond to the positions of the anchor bars 14, and the roots of the anchor reinforcing bars 14 are fixed to the first parallel iron plate 13 by welding. In this embodiment, a nut is screwed into the base end of the anchor reinforcing bars 14.
It is easy to assemble to the first parallel iron plate 13.

A pair of first parallel iron plates 13 are arranged in parallel, and the side end surfaces 13 of each first parallel iron plate 13
a is welded and fixed to the inner peripheral surface of the formwork reinforcing bar 1. The pair of second parallel iron plates 16 have the same configuration, and their side end surfaces are fixed to the first parallel iron plate 13 by welding. Reference numeral 19 shown in FIG. 8 is a groove formed in the second parallel iron plate 16 for slidably engaging the second movable reinforcing bar 17.

Each of the first and second movable reinforcing bars 15, 17 has one end 15a, 17a formed to be wider than the width of the groove 18, 19 outside the groove 18, 19, and has a groove at the other end. A nut having an outer diameter larger than the width of 18, 19 is
It is screwed outside the grooves 18 and 19.

Therefore, the first and second moving rebars 1
5 and 17 are grooves 1 without falling out of grooves 18 and 19.
It is free to move along 8, 19, and when necessary for construction, both moving rebars 15, 17 are slid to the end as shown in FIG. 10 to make a hole, and concrete is poured into the construction hole and filled. In this case, as shown in FIG. 7, both movable reinforcing bars 15, 17 can be arranged side by side at equal intervals.

The first and second moving reinforcing bars 15, 17
Any means can be used to prevent the metal from falling out of the grooves 18 and 19, for example, by bending the end of the reinforcing bar or using a rivet.

As shown in FIG. 7, the first and second movable reinforcing bars 15, 17 are provided in such a number that they can be arranged corresponding to the slab reinforcing bars 100 and the anchor reinforcing bars 14 when embedded in concrete. Have been. The column reinforcing bars 2 are welded near the center of each of the four sides of the form reinforcing bar 1.

In the second embodiment configured as described above, when it is finally embedded in concrete,
Since the slab reinforcing bars 100 and the moving reinforcing bars 15, 17 are connected via the anchor reinforcing bars 14, extremely excellent strength can be secured.

Incidentally, the first parallel iron plate 13 and the second parallel iron plate 16 may be arranged so as to be shifted vertically as shown in FIG. Further, as shown in FIG. 12, if a semicircular hook portion 1 a is projected outward from each of the sides of the form reinforcing bar 1, the force applied to the slab reinforcing bar 100 is stretched in a direction perpendicular thereto. Since it is transmitted to the slab reinforcing bar 100 via the hook portion 1a, the stress is dispersed and the reinforcing strength can be improved.

The present invention is not limited to the above embodiments. For example, the form reinforcing bar 1 may have a circular or other shape, or the form reinforcing bar 1 may be omitted. .

[0044]

According to the present invention, a slab opening curing reinforcing bar is installed in a construction hole, and when necessary for construction, a movable reinforcing bar is slid to an end to open a hole, and concrete is poured into the construction hole. When burying, both moving rebars may be arranged at equal intervals, so that the construction of the curing rebar for the construction hole can be performed together with the rebar construction of the floor plate, and the process can be simplified.

By connecting the anchor member formed on the parallel member to the concrete of the floorboard, the parallel member is integrated with the floorboard side, so that extremely excellent strength can be obtained.

Further, if a plurality of anchor members are projected from the parallel members and arranged so as to correspond to the slab rebar,
More excellent strength can be obtained.

Further, the plurality of rebars connected to the parallel members function as a formwork for forming a construction hole when concrete is cast on the floorboard, and then concrete is poured into the construction hole. When filling, it is buried as it is, so it is not necessary to attach and detach the mold for forming the holes for construction, and the process is greatly simplified.

[Brief description of the drawings]

FIG. 1 is a perspective view of a slab opening curing reinforcing bar according to a first embodiment of the present invention.

FIG. 2 is an exploded perspective view of the formwork reinforcing bar according to the first embodiment of the present invention.

FIG. 3 is a perspective view showing a first parallel reinforcing bar and a first moving reinforcing bar according to the first embodiment of the present invention with hatching.

FIG. 4 is a perspective view showing a second parallel reinforcing bar and a second moving reinforcing bar according to the first embodiment of the present invention with hatching.

FIG. 5 is a perspective view of the first embodiment of the present invention in which a slab opening curing reinforcing bar is opened.

FIG. 6 is a partial side sectional view of the first embodiment of the present invention in a state where a curing lid is placed.

FIG. 7 is a plan view of a slab opening curing reinforcing bar according to a second embodiment of the present invention.

FIG. 8 is a front sectional view of a slab opening curing steel according to a second embodiment of the present invention.

FIG. 9 is a perspective view of a parallel iron plate portion according to the second embodiment of the present invention.

FIG. 10 is a plan view of the second embodiment of the present invention in a state where a slab opening curing reinforcing bar is opened.

FIG. 11 is a front sectional view of a slab opening curing steel bar according to a third embodiment of the present invention.

FIG. 12 is a perspective view of a form reinforcing bar according to a fourth embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF REFERENCE NUMERALS 1 Formwork reinforcing bar 3 First parallel reinforcing bar 4 Anchor part 5 First moving reinforcing bar 6 Second parallel reinforcing bar 7 Second moving reinforcing bar

Claims (7)

(57) [Claims] 1. A slab-opening rebar for filling a construction hole formed in a floor plate of a reinforced concrete structure with reinforced concrete at the time of completion of construction, which is installed in the construction hole and viewed from the opening side of the hole. A first parallel member arranged substantially in parallel and straight, one or a plurality of first moving rebars whose both ends are slidably engaged with the first parallel member, and installed in the construction hole. And a second parallel member arranged substantially straight parallel to a direction different from the first parallel member when viewed from the opening side of the hole, and both ends slidably with respect to the second parallel member. A slab provided with one or a plurality of second moving rebars having a moving range overlapping with the moving range of the first moving reinforcing bar when viewed from the opening side of the construction hole. Opening-curing rebar. 2. The slab opening reinforcing bar according to claim 1, wherein the first and second parallel members are reinforcing bars. 3. The reinforcing steel slab opening according to claim 2, wherein at least one of the first and second parallel members has an extension protruding outside the construction hole. 4. The rebar according to claim 1, wherein the parallel member is a plate-like member, and a base of an anchor member protruding outside the construction hole is connected to each of the plate-like members. 5. The slab opening curing according to claim 4, wherein a plurality of anchor members are connected to each of said plate members so that the anchor members protrude laterally from each of said plate members at appropriate intervals. Rebar. 6. A plurality of rebars, which are arranged on a portion to be an inner peripheral surface of a construction hole when concrete is poured on a floor plate and function as a formwork, are provided in connection with the first and second parallel members. The slab opening curing reinforcing bar according to claim 1, 2, 3, 4, or 5, wherein 7. The slab-opening reinforcing bar according to claim 6, wherein the reinforcing bar functioning as a form has a hook portion protruding outside the construction hole.