JPH08239950A - Slab-opening curing reinforcement - Google Patents

Abstract

PURPOSE: To improve workability by installing moving reinforcements, in which both ends are engaged slidably with a first parallel member arranged into the opening section of a hole for construction works and a second parallel member disposed in the direction different from the first parallel member respectively. CONSTITUTION: When concrete is placed on a floor board, anchors 4 projected to the outsides of form reinforcements 1 are combined with the concrete of the floor board, and a first parallel reinforcement 3 and a second parallel reinforcement 6 are fixed firmly onto the floor board. Since concrete is not flowed into the reinforcements 1 at that time, a hole for construction works is formed inside the reinforcements 1. First moving reinforcements 5 and second moving reinforcements 7 are slid to ends and the hole for construction works is bored at the time of requirement for construction works. When construction works are completed and concrete is poured into the hole for construction works and the hole is buried, the reinforcements 5, 7 are arranged at a regular interval so as to be fitted to concete placing. Accordingly, the reinforcements can be arranged simultaneously to the floor board and the hole for construction works, and the strength of the reinforcements can be increased, and the mounting and dismounting of the forms of the hole for construction works can be unnecessitated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slab opening curing rebar for filling work holes formed in a floorboard of a reinforced concrete structure with reinforced concrete at the end of work.

[0002]

2. Description of the Related Art When constructing a reinforced concrete building, in order to perform various constructions under the floor, there are cases in which a construction hole commonly referred to as a "hole" is made in a reinforced concrete floor plate (slab). is there.

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

During construction, the opening of the construction hole is closed with an iron plate or the like and opened when necessary, and at the end of the construction, reinforcing bars are stretched in the construction hole and then concrete is poured to fill the hole. .

[0005]

[Problems to be Solved by the Invention] However, in the above-mentioned process, since it is necessary to stretch the floor plate with the reinforcing rod to hit the concrete, and then to construct the reinforcing rod only in the construction hole, it is troublesome. Is.

[0006] Since the reinforcing bars stretched over the construction holes are not joined to the concrete that was first struck in the main body of the floorboard, it is unavoidable that the strength of the construction holes is reduced. .

Further, in order to form the construction holes, it is necessary to arrange a formwork having the shape of the construction hole at the time of first concrete pouring, and to remove the formwork after the concrete pouring is completed. Construction is also troublesome.

[0008] Therefore, an object of the present invention is to provide a slab opening curing reinforcing bar capable of forming a work hole and filling the hole in a simple process and obtaining excellent strength in the hole filling portion.

[0009]

In order to achieve the above object, a slab opening curing reinforcing bar of the present invention is a slab opening curing reinforcing bar for filling 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 when viewed from the opening side of the hole;
One or a plurality of first moving rebars having both ends slidably engaged with the first parallel member, and the first moving rebar installed in the construction hole and viewed from the opening side of the hole. The second member arranged substantially straight in parallel to the direction different from the parallel member
And a moving range overlapping both ends of the first moving rebar when viewed from the opening side of the construction hole so that both ends are slidably engaged with the second parallel member. A book or a plurality of second moving reinforcing bars is provided.

The first moving reinforcing bar slides at its both ends with respect to the first parallel member, and the second moving reinforcing bar slides at its both ends with respect to the second parallel member. Then, the moving range of both moving reinforcing bars has a portion overlapping when viewed from the opening side of the construction hole.

Therefore, by installing a slab opening curing rebar in the construction hole and moving both moving rebars, when necessary for construction, both moving rebars are slid to the end to open a hole, and the concrete is put in the construction hole. When pouring and filling, both moving rebars can be arranged side by side 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 portion projecting to the outside of the construction hole. .

The parallel member is a plate-shaped member,
The base portion of the anchor member projecting outside of the construction hole may be connected to each of the plate members, and the anchor member projects laterally from each of the plate members at appropriate intervals. A plurality of anchor members may be connected to each plate member.

Further, a plurality of reinforcing bars arranged at the inner peripheral surface of the construction hole when concrete is poured onto the floor plate and functioning as a formwork are connected to the first and second parallel members. Or a hook portion protruding outside the construction hole may be formed on the reinforcing bar functioning as the mold.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION 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 construction hole formed in a floor plate of a reinforced concrete structure with reinforced concrete at the time of completion of the construction, and a concrete slab on the floor plate is provided on the outer peripheral portion thereof. A plurality of rebars 1 ... (Hereinafter, referred to as “form frame rebar 1”) are arranged in a portion which becomes an inner peripheral surface of a construction hole when flowing, and function as a formwork.

As shown in the exploded view of FIG. 2, the formwork rebars 1 ... Form a rectangular ring shape by welding a pair of U-shaped rebars at their open ends, and then the rectangular shape It is formed by stacking a plurality of reinforcing bars (for example, 5 to 6 steps).

In each of the formwork rebars 1 ..., only the central welded portion is partially overlapped vertically, so that in the other portions, a space for one rebar is provided between the formwork rebars 1 ... Are formed.

As shown in FIG. 1, each formwork rebar 1 is welded and fixed to pillar rebars 2 ... Standing at four corners. In addition, the tops of the pillar rebars 2 ... Project slightly above the uppermost formwork rebar 1.

Reference numeral 3 denotes a first parallel rebar installed in the construction hole and arranged substantially straight in parallel when viewed from the opening side (upper side) of the hole, and has long sides on both sides of the formwork rebar 1. Of the two form rebars 1, 1 which are respectively arranged immediately inside of the above, and which protrude outward from the gap between the two form frame rebars 1 and 1 which are welded to the column rebars 2.

The portion extending further outward from the welded portion is an anchor portion 4 that is joined to the concrete when the floor board is concrete-cast, and the anchor portion 4 is joined to the concrete of the floor board to form the first portion. The parallel reinforcing bars 3 are strongly integrated with the floor board.

The first moving rebars 5 arranged at right angles to the first parallel rebars 3 have both ends bent in J-shapes, and the portions loosen the first parallel rebars 3. It is arranged so as to surround it. FIG. 3 shows the first parallel reinforcing bar 3 and the first parallel reinforcing bar 3.
The moving rebar 5 of FIG.

Therefore, both ends of the first moving reinforcing bar 5 are slidably engaged with the first parallel reinforcing bar 3,
It can be freely slid along the first parallel rebar 3 in the direction of arrow A in FIG. Although eight first moving reinforcing bars 5 are provided in this embodiment, one or more first moving reinforcing bars 5 may be set depending on the size of the construction hole or the like.

Returning to FIG. 1, reference numeral 6 denotes a second parallel reinforcing bar which is installed in the construction hole and is arranged at a right angle to the first parallel reinforcing bar 3 when viewed from the opening side of the hole, Formwork rebar 1
Of the two form rebars 1 and 1 which are respectively arranged just inside the short sides on both sides of the above, and which protrude outward from the gap between the two formwork rebars 1 and 1 arranged below and are welded to the column rebars 2. The extended portion is also the anchor portion 4.

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

Therefore, both ends of the second movable reinforcing bar 7 are slidably engaged with the second parallel reinforcing bar 6,
It can be freely slid along the second parallel reinforcing bar 6 in the direction of arrow B in FIG. In this embodiment, four second movable reinforcing bars 7 are provided, but one or more may be set depending on the size of the construction hole or the like.

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

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

The slab opening curing reinforcing bar constructed as described above is installed in a portion forming a construction hole when concrete is poured into a floorboard. And the formwork rebar 1 becomes a formwork for forming the construction hole.

Then, when concrete is poured on the floor plate, the anchor portion 4 projecting to the outside of the form rebar 1 is connected to the concrete of the floor plate, and the parallel rebars 3 and 6 are strongly integrated with the floor plate. 6 has excellent strength in the fixed state. Then, since concrete does not flow into the inside of the form rebar 1, a construction hole is formed there.

Then, by sliding both moving rebars 5 and 7, when necessary for construction, both moving rebars 5 and 7 are slid to the end to open a hole, and when the construction is completed, concrete is put in the working hole. When pouring and filling, both moving rebars 5 and 7 can be arranged at equal intervals so as to be suitable for concrete pouring. At that time, the formwork rebar 1 is embedded together in the construction hole.

Further, when there is no construction using the construction holes, it is sufficient to cover the form rebar 1 with the curing lid 10 as shown in FIG. Since it protrudes from the upper end of the formwork rebar 1, the foot 1 of the curing lid 10
It is possible to prevent the position shift of the curing lid 10 by engaging the support rod 0 with 0a.

7 to 10 show a second embodiment of the present invention. FIG. 7 is a plan view of a slab opening curing reinforcing bar and FIG. 8 is a front sectional view thereof. However, FIG. 8 is illustrated vertically longer than it actually is for the sake of clarity.

A feature of this embodiment is that both ends of the first and second moving reinforcing bars 15 and 17 are slidably supported. For example, the first and second parallel plates 13 and 13 are formed of iron plates. 16 and the anchor rebars 14 ... Corresponding to the slab rebars 100 ... stretched in the concrete of the floorboard at predetermined intervals in a mesh shape, the four parallel steel plates 13, 16
The point is that a large number are projected on each outer surface.

As shown in the perspective view of FIG. 9, the first parallel iron plate 13 is arranged in an upright orientation so that one end of the first moving rebar 15 can be slidably engaged. Groove 18 is formed in the horizontal direction.

From the first parallel iron plate 13, there are five anchor rebars 14 in upper and lower two rows, and slab rebars 100.
Of the anchor rebars 14 ... Are fixed to the first parallel iron plate 13 by welding. In addition, in this embodiment, a nut is screwed to the base end portion of the anchor reinforcing bar 14 ...
It is easy to assemble to the first parallel iron plate 13.

The pair of first parallel iron plates 13 are arranged in parallel, and the side end faces 13 of each of the first parallel iron plates 13 are arranged.
a is welded and fixed to the inner peripheral surface portion of the form rebar 1. The pair of second parallel iron plates 16 are also configured in the same manner, and their side end faces are welded and fixed to the first parallel iron plates 13. Reference numeral 19 shown in FIG. 8 is a groove formed in the second parallel iron plate 16 in order to slidably engage the second moving reinforcing bar 17.

The first and second movable reinforcing bars 15 and 17 have one end portions 15a and 17a formed outside the grooves 18 and 19 to be thicker than the widths of the grooves 18 and 19, respectively, and the other ends thereof are formed with grooves. A nut with an outer diameter larger than the width of 18, 19
It is screwed onto the outside of the grooves 18, 19.

Therefore, the first and second moving rebars 1
5 and 17 do not come out of the grooves 18 and 19
It is movable along 8 and 19 and when necessary for construction, slide both moving rebars 15 and 17 to the end to open a hole as shown in FIG. 10 and pour concrete into the construction hole to fill it. At this time, as shown in FIG. 7, both moving reinforcing bars 15 and 17 can be arranged at equal intervals.

The first and second moving reinforcing bars 15, 17
Any means may be used to prevent the rod from coming out of the grooves 18 and 19, and for example, the end portion of the reinforcing bar may be bent or rivets may be used.

As shown in FIG. 7, the first and second moving reinforcing bars 15 and 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 being embedded in concrete. Has been. Further, the column rebars 2 ... Are welded near the central portions of the four sides of the form rebar 1.

In the second embodiment constructed as described above, when it is finally embedded in concrete,
Since the slab reinforcing bars 100 and the moving reinforcing bars 15 and 17 are connected to each other through the anchor reinforcing bars 14 and so on, it is possible to secure extremely excellent strength.

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

The present invention is not limited to the above-described embodiments. For example, the form rebar 1 may have a circular shape or another shape, or the form rebar 1 may be omitted. .

[0044]

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

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

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

Further, a plurality of reinforcing bars connected to the parallel members are made to function as a formwork for forming a construction hole when concrete is poured into the floorboard, so that concrete can be poured into the construction hole after that. When filling it, it is filled together as it is, so there is no need to attach and detach the formwork for forming the construction hole, and the process is greatly simplified.

[Brief description of 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 rebar according to the first embodiment of this invention.

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

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

FIG. 5 is a perspective view showing a state where the slab opening curing reinforcing bar of the first embodiment of the invention is opened.

FIG. 6 is a side partial cross-sectional view of a state in which the curing lid of the first embodiment of the present invention 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 reinforcing bar 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 showing a state where the slab opening curing reinforcing bar of the second embodiment of the invention is opened.

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

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

[Explanation of symbols]

 1 Formwork Reinforcing Bar 3 First Parallel Reinforcing Bar 4 Anchor Section 5 First Moving Reinforcing Bar 6 Second Parallel Reinforcing Bar 7 Second Moving Reinforcing Bar

Claims (7)

[Claims] 1. A slab opening curing bar for filling a construction hole formed in a floorboard of a reinforced concrete structure with reinforced concrete at the end of construction, which is installed in the construction hole and viewed from the opening side of the hole. A first parallel member arranged substantially straight in parallel, one or a plurality of first moving rebars having both ends slidably engaged with the first parallel member, and installed in the construction hole. A second parallel member arranged substantially straight in parallel with the first parallel member in a direction different from that of the first parallel member when viewed from the opening side of the hole, and both ends slidable with respect to the second parallel member. A slab provided with one or a plurality of second moving reinforcing bars which are engaged with each other and have 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 rebar. 2. The slab opening curing reinforcing bar according to claim 1, wherein the first and second parallel members are reinforcing bars. 3. The slab opening curing reinforcing bar according to claim 2, wherein an anchor portion projecting to the outside of the construction hole is formed in an extension portion of at least one of the first and second parallel members. 4. The slab opening curing reinforcing bar according to claim 1, wherein the parallel member is a plate-shaped member, and a base portion of an anchor member protruding outside the construction hole is connected to each plate-shaped member. 5. The slab according to claim 4, wherein a plurality of anchor members are connected to the plate members so that the anchor members project laterally from the plate members at appropriate intervals. Opening rebar. 6. A plurality of rebars, which are arranged in a portion which becomes an inner peripheral surface of the construction hole when concrete is poured into the floor board and function as a formwork, are connected to the first and second parallel members. The slab opening curing rebar according to claim 1, 2, 3, 4, or 5, which is provided. 7. The slab opening curing reinforcing bar according to claim 6, wherein the reinforcing bar functioning as the form is formed with a hook part projecting outside the construction hole.