JPH08128158A - Fixture of corner main reinforcement for beam bottom - Google Patents

Abstract

PURPOSE: To fix a corner main reinforcement at the corner section of a stirrup under the state, in which the corner main reinforcement is crossed at a right angle with the horizontal side of the stirrup, by a simple operation. CONSTITUTION: A fixture, which holds down and fixes a corner main reinforcement for a beam bottom to the lower-side corner section of a stirrup and is made of a steel wire material, is composed of a holder body 1 and an operating rod 2 upwards projected from the holder body 1. The holder body 1 is constituted of a holder straight section and main-reinforcement retaining sections 5, in which the free end sections of both oppositely placed side sections 4 of a rod made of steel formed in a U shape in a plan view are bent and formed downwards. A hook 6 for engagement retained to a hook for engagement at the upper end section of the operating rod of another fixture holding the same attitude at a place, where another fixture is faced oppositely while holding a center in the cross direction of the reinforcement for a beam, when the operating rod 2 is rotated up to a central position in the cross direction of the reinforcement for the beam while using the holder body 1 as a rotary fulcrum is folded and formed at the upper end section of the operating rod 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixing tool for pressing and fixing a corner main bar for a beam bottom to a lower corner portion of a stalap.

[0002]

2. Description of the Related Art When assembling a reinforcing bar for a beam in a pit for forming a beam, the main reinforcing bar is generally fixed to a slap by a binding means using a thin steel wire. However, among the above-mentioned main reinforcements, the binding work of the corner main reinforcement for the beam bottom with the steel wire is a work at the bottom in the beam forming pit, so for example, the knee is attached to the slab formwork surface and the upper half of the body is bent, An unreasonable posture was required, such as inserting both hands in the pit, and it took a considerable amount of time and labor to bind the steel wires, resulting in inefficient work. In addition, there is a problem that it is not easy to bind the steel wires, and the work efficiency greatly depends on experience and skill.

Therefore, the inventor of the present invention first proposed a fixing metal fitting for fixing the beam bottom corner main bar to the corner portion of the stalap without tying the steel wire (actually, 1-1578).
No. 15). The fixing metal fittings for the corner main bar for the beam bottom proposed earlier include a holding metal fitting formed by bending at least one end portion of the metal fitting formed in a substantially U shape in a plan view downward, and a U-shaped metal fitting. It is composed of an operating rod that has a hook portion at the upper end portion that extends upward from the metal fitting, the U-shaped metal fitting is fitted to the vertical side of the strap, the engaging portion is engaged with the corner main bar, and this engagement is performed. By rotating the operating rod toward the center in the width direction of the reinforcing bar for the beam with the U-shaped metal fitting as the center of rotation for the contact with the vertical side, the main corner bar is pulled up to the corner of the stirrup, and the center of the reinforcing bar for the beam By engaging the hook portion formed on the upper end of the operation rod rotated in the direction with the hook portion of the other fixing metal piece that is arranged in a facing state, the pulling state of the main bar is maintained. is there

[0004]

However, according to the above-mentioned proposal, the main corner corners can be firmly fixed to the corner portion of the stalap without binding with steel wire. Since it is fitted to the vertical side of the stuffed wrap and engages the main reinforcement with a very short distance of the wrap diameter, the corner main reinforcement can be retained even when the corner main reinforcement is inclined to the horizontal side of the wrap. , The main bar is separated from the stalap in the middle part of the main bar arrangement direction, and the U-shaped metal fitting is inserted into the vertical side of the wrap and the lowered engaging part of the U-shaped metal fitting cannot catch the corner main bar. There was also something that had to be fixed. The present invention has been made in view of such a point, and an object of the present invention is to provide a fixture capable of fixing a corner main bar in a state orthogonal to a stap lap horizontal side only by disposing a fixing metal fitting. .

[0005]

In order to achieve the above-mentioned object, the present invention comprises a holding fixture main body and an operating rod extending upward from the holding fixture main body. The steel rod formed in a square shape in plan view is formed by bending the free end portions of both projecting portions of the steel rod facing each other downward to form the main bar hooking portion, and the holder main body is provided on the upper end portion of the operating rod. When the operating rod is rotated to the center position in the width direction of the beam rebar with the rotation fulcrum as the fulcrum, keep the same posture at the positions facing each other with the center of the above as the locking rod. The feature is that the hook is formed by folding back.

[0006]

According to the present invention, since the holder main body is formed in a plane-like shape in plan view in which the main bar retaining portions are placed at a predetermined interval and are opposed to each other, the holder main body has at least one stap vertical side on the opposite side. By arranging them so that they are sandwiched between them, the main bar retaining part catches the main bar and pulls it toward the stirrup corner side at two places that have been extended to a certain distance, and the main bar fixed by the main bar retaining part is the stirrup corner part. It will be fixed in a state that is orthogonal to the horizontal side of the stab. Further, at the time of mounting, the operation rods of the fixing metal fittings arranged so as to face the side surface of the beam are securely held by the engagement of the hooks formed at the tip portions thereof.

[0007]

1 is a perspective view, FIG. 2 is a perspective view showing a use state, and FIG. 3 is a sectional view showing the use state. This fixing metal fitting is composed of a holder main body (1) formed in the shape of a horseshoe in plan view, and an operation rod (2) extending upward from the central portion of the connecting rod portion of the holder main body (1). There is.

The holder main body (1) is formed by bending both ends of the steel rod (3) to the dimension of the stapling arrangement pitch to form a square-shaped plan view, and the side edges of the square-shaped opposite. part
A main bar retaining portion (5) is formed by bending the tip end portion of (4) downward in an arc shape so as to be orthogonal to the projecting axis of the side portion.

On the other hand, the operating rod (2) has its lower end fixed to the central part of the connecting side part connecting the side parts of the holder main body (1), and the upper end part is J-shaped. A hook (6) for engagement is formed by folding back. The operating rod (2) is fixed in a vertically extending state with the side part (4) of the holder main body (1) horizontally positioned,
The engaging hook (6) formed on the upper end portion of the operating rod (2) has its bending direction parallel to the connecting side of the holder main body (1).

Next, the procedure for fixing the corner main bar using this fixing bracket will be described. The piers are spanned between the upper surfaces of the formwork (not shown) arranged to face each other to form the pits, and the upper corner main bar (10) of the beam is placed on the pier, and the upper corner main bar (10) is placed. The upper engaging portion (12) of the sturlap (11) is hooked on the plurality of stabs (11), and the plurality of stabs (11) are suspended in the pit at appropriate intervals. Then, the reinforcing bars that serve as the corner main bars (14) on the beam bottom side are deposited in the horizontal side (13) of the stub (11) hanging in the pit.

Next, a large number of hanging straps (11)
Among them, the vertical side (15) of the slap (11a) located every several pitches and the slap (11b) located immediately next to it.
Fixing metal fittings are attached from the outside of the stapling (11) in a state where they are positioned inside the side portions (4) that are arranged opposite to each other, and the main bar hook formed at the tip of the side portion (4) The part (5) is engaged with the beam bottom side corner main bar (14) deposited on the horizontal side (13) of the sturup (11) from above.

The operation rod (2) is tilted toward the center of the beam reinforcing bar in the width direction while the main bar retaining portion (5) catches the corner main bar (14). Then, the connecting side portion of the holder main body (1) abuts the outer peripheral surface of the stapler (11), and the side side portion (4) of the holder main body (1) contacts the connecting side portion and the strap (11). Rotate with this part as the center of rotation, and staple the corner main bar (14) (11).
To the corner of. Then, the engaging hook (6) formed on the upper end of the operation rod (2) is engaged with the hook on the upper end of the operation rod by the fixing metal fitting arranged on the opposite side surface of the beam reinforcing bar to hold the posture of the fixing metal fitting. To do. As a result, the beam bottom side corner reinforcing bars (14) are attracted and fixed to the corner portions of the stirrup (11).

At this time, since the side portion (4) of the holder main body (1) of the fixing metal fitting is arranged in a state where a predetermined stalap disposition pitch is maintained, this side portion (4) is attached to the stalap (1).
By descending along the vertical side (15) of (1), the stapling (15) holds a predetermined pitch. Further, since the beam bottom side corner main bar (14) is pulled toward and fixed to the corner part of the stirrup (11) at two adjacent places, the beam bottom side corner main bar (14) is connected to the horizontal side (13) of the stirrup (11). As they are pulled in substantially parallel to each other while keeping the orthogonal posture, the beam bottom side corner main bar (14) is located at the corner of the stalap (11) even in the stalap (11) portion where the fixing bracket is not arranged.

As described above, since the beam bottom side corner main bars (14) are fixed to the corners at two places extending a certain distance, the vertical side (1
5) can be positioned in parallel, and the wrap (1
Since the vertical side (15) of 1) is inclined with respect to the vertical line, one of the main bar retaining portions (5) of the fixing bracket cannot catch the beam bottom corner main bar (14). Main bar hook
By catching the beam bottom side corner reinforcements (14) at (5), the vertical side (15) of the stapling (11) can be positioned vertically.

Stlap without fixing metal fittings (11)
Is adjusted to have a predetermined pitch. At this time, since the beam bottom corner main bar (14) is fixed to the slap (11) with fixing metal fittings at appropriate intervals, the beam bottom corner main bar (14) is parallel to the upper corner main bar (10). Since the upper and lower corner main bars (10) and (14) are kept at a constant distance, the vertical side (15) of the stalap (11) without fixing metal fittings should also maintain a vertical posture. Become.

In the above example of use, two stapling pieces are used.
Although the fixing metal fittings are attached so as to straddle (11), they may be arranged so as to straddle three or more staplings (11).
Although it may be arranged so as to straddle one stalap (11), the connecting side part connecting both side parts (4) abuts the stalap (11) and the holder body is centered around the abutting part. (5)
Since it has to be rotated, it is necessary to use it so that at least one stapler (11) is located between the side portions (4). Also, the holder body (5)
The space between the two sides forming the slab does not have to be formed to the slap arrangement pitch dimension, and it is sufficient if the interval is set to an appropriate interval. Setting it at (for example, 20 cm or 30 cm) has an advantage that the pitch of the stalap can be easily set.

[0017]

According to the present invention, since the main body of the holder is formed in the shape of a squat in a plan view in which the main bar retaining portions are opposed to each other at a predetermined interval, the holder main body is provided with at least one opposite side. By arranging so that the vertical side of the stab is sandwiched,
The main reinforcement hooking part catches the main reinforcement and pulls it toward the stalap corner side at two places that have been extended to a certain distance, and the main reinforcement fixed by the main reinforcement retention part is perpendicular to the horizontal side of the slap at the stalap corner. Can be fixed to. In addition, at the time of mounting, the operating rods of the fixing metal fittings arranged in a state of facing the beam side surface portion can be securely held by the engagement of the hooks formed at the tip portions thereof. Moreover, since this work only requires mounting the fixing metal fittings with the slap being sandwiched between them, the work of disposing the corner main bar at the beam bottom can be easily and accurately performed,
It can be performed homogeneously without being influenced by experience or skill.

[Brief description of drawings]

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

FIG. 2 is a perspective view showing a usage state.

FIG. 3 is a cross-sectional view in use.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Retainer main body, 2 ... Operation rod, 4 ... Both side parts of a retainer main body, 5 ... Main bar retaining part, 6 ... Engagement hook, 11 ... Strap, 14 ... Beam bottom corner main bar.

Claims (1)

[Claims] 1. A corner main bar (14) for a beam bottom is attached to a stirrup (1).
1) A fixing bracket made of steel wire for pressing and fixing to the lower corner portion, which includes a holder body (1) and an operation rod (2) extending upward from the holder body (1). The holder main body (1) is formed by bending the free ends of the opposite side portions (4) of the steel rod formed in the shape of a plane in a plan view by bending it downward. When the operation rod (2) is rotated to the center position in the width direction of the beam reinforcing bar using the holder body (1) as a fulcrum at the upper end of the operation rod (2), A fixing bracket for the corner main bar for the beam bottom, which is formed by folding back an engaging hook (6) that is hooked to the hook at the upper end of the operating rod of another fixing bracket that holds the same posture with the center facing each other.