JPH06269885A - Device for bending reinforcing bar - Google Patents

Abstract

PURPOSE:To bend a fie-hoop or a stirrup in a time of assembling a reinforcing bar. CONSTITUTION:The device is composed of a frame 10 inserting between main bars 2, a press-bending arm 12 bending a tie-hoop or a stirrup by being supported freely bending on the frame 10 through a cylinder type jack 11, and a claw like receiving metal 13 which is attached on the frame as one body, clamps the band bar or the rib bar and abuts to the main bar 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcing bar bending apparatus for locally bending a relatively small-diameter strip bar or rib bar which holds a main bar of a column or a beam of a reinforced concrete structure.

[0002]

2. Description of the Related Art When a reinforcing bar is assembled, there is no means for bending the stirrup and the ribs at the current position, even though the reinforcing bar has a relatively small diameter. Therefore, as shown in FIGS. The stirrup 102 of the pillar 101 at the intersecting portion was cut and inserted into a small member and then welded 103 to form a holding shape. The beam 104 was assembled by combining open type ribs 105a and 105b over the entire span. In the drawing, 106 is a beam main bar, 107 is a column main bar, 108 is an auxiliary bar, and 109 is a floor plate. Also, 105c is the floor plate 10
This is the shape of the ribs when there is no 9 (dotted line portion).

[0003]

However, FIG. 9A described above is used.
Welding 103 in Fig. 9 increases welding quality control and construction cost.
The beam 104 of B has problems that the ribs are divided into 105a and 105b, the number of steps is increased, and the ribs have to have the shape of 105c when there is no floor board 109.

The present invention was developed to address such problems, and it is an object of the present invention to enable bending of the stirrup or the rib when assembling the reinforcing bar.

[0005]

The structure of the present invention for achieving the above object will be described with reference to FIGS. 1 to 8 corresponding to an embodiment. A rebar bending apparatus for bending, which is a frame 10 that can be inserted between main bars of the rebar, and a band or a rib that is flexibly supported by the frame 10 via a cylinder-type jack 11 so as to be bendable. The push-bending arm 12 and the hook-shaped receiving member 13 that is integrally attached to the frame 10 and that clamps the stirrup or the rib and abuts against the main bar.

[0006]

According to the present invention, the frame is inserted between the main bars of the reinforcing bar by the above-mentioned means so that the bar hooks of the frame abut against the main bar and the band or the rib is pinched. In the clamped state, the pushing and bending arm is rotated by the power means of the jack to wrap and bend the stirrups or ribs around the main muscles, so that the relative position of the main muscles and stirrups or ribs is prevented from changing. It is possible to improve dimensional accuracy.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 8. In FIG. 1A, an internal bar 3 and a beam main bar 4 are assembled to a column main bar 2 of a column 1 and then an oblique bar 5 is formed. FIG. 1B shows a case where the diagonal bar 5 is bent after being inserted in a skewered manner and is bent as shown by a dotted line to maintain the proof stress equivalent to that of the belt bar 102 of FIG. 9A. 8 and the ribs 9 are assembled, and then the upper portion of the ribs 9 is bent as shown by the dotted line to secure a shape having the necessary structural performance.

[0008] In this case, a band or rib for bending
The muscle, for example the diagonal muscle 5 of FIG. 1A, is the main pillar muscle as shown in FIG.
2 and the central axis of the diagonal line 5 at each bending angle is
If there is no dimensional change in the length direction, the shape shown by the dotted line
It is deformed and the locus of the deformation is a at each position._0,a
₁, A₂, A₃, A_Four, B₀, B₁, B₂, B₃，
b _Four, C₀, C₁, C₂, C₃, D₀, D₁, D₂, F
₀, F₁Is.

FIGS. 3 to 7 show an apparatus for bending the diagonal or ribs as described above. The apparatus has a frame 10 which can be inserted between the main bars, and a cylinder type jack 11 on the frame 10. Push-bending arm 12 and push-bending arm 12 for bending and bending the stirrups or ribs supported by push-bending through
No. 0, which is integrally attached to 0 to hold the strap or the rib and engages with the main bar.

More specifically, the push-bending arm 1 will be described.
A cylindrical type jack 2 has one end formed on a curved arm pivotally supported on the frame 10 via a pivot 14 and a roller 16 on the other end via a pivot 15 and a pivot 17 at an intermediate portion thereof. 11 piston lot 18 is supported,
The cylinder type jack 11 has a pivot 19 provided at the base thereof.
It is pivotally supported by the frame 10 via.

As shown in FIGS. 6 and 7, the hook-shaped receiving metal 13 is attached to the outside of the fixed receiving metal 13a in the same shape as the fixed receiving metal 13a integral with the frame 10 and the fixed receiving metal 13a. The clamp jack 13b is pivotally supported by the rod 21 of the hydraulic jack 20 and is elastically urged by the spring 22 between the joint surfaces. Reference numeral 23 in the drawing denotes a pressure oil supply hose of the hydraulic jack 20.

Next, the operation will be described with reference to FIGS. 8A to 8C. Since the frame 10 has a narrow space between the column main bars 2 as shown in FIG. 8A, as shown in FIG. The insertion is made so as to be sandwiched between the receiving metal 13b and the tip end of the push-bending arm 12 is placed on the diagonal line 5.
Next, as shown in FIG. 8B, the column main bar 2 and the fixed bracket 13a
And the sandwiching money 13b. Further, as shown in FIG. 8C, the fixed support 13a and the clamp support 13b are engaged and rotated on the column main bar 2 so that the push-bending arm 12 can be bent.

Next, in FIG. 3, the sandwiching bracket 13b is slanted between the fixed bracket 13a and the fixed bracket 13a by the operation of the jack 20.
After confirming that the sheet is firmly pinched, the jack 11 is operated and the roller 16 pushes and bends the diagonal streak 5 from the pressure-sensitive point P ₀ to the pressure-sensitive point P ₄ to complete the necessary bending work. On the other hand, the ribs 9 of the beam 6 are the diagonal ribs 5 of the pillar 1 and the ribs 9
The explanation is omitted by replacing the main beam 7 with the beam 7, but the necessary bending angle is that the diagonal line 5 of the column 1 is 180 ° with respect to the beam 6
There is no problem because the ribs 9 are 135 ° and 90 °.
(Refer to FIGS. 1A and 1B) Although illustration of each hydraulic equipment is omitted, a machine in a range of a normal technical level is used to turn on / off a switch, operate a motor, and supply oil.

As described above, the diagonal lines 5 of the columns 1 and the ribs 9 of the beams 6 are described. However, since bending at the current position of the reinforcing bar is necessary at every part of the construction site, the proposal of the present proposal is made. Reinforcing bar bending equipment is used.

[0015]

As described above, according to the present invention, a frame which can be inserted between the main bars of a reinforcing bar and a reinforcing bar which is bendably supported by the frame via a cylinder type jack to bend the band or the rib. Since the push-bending arm and the hook-shaped receiving member that is integrally attached to the frame and clamps the stirrups or the ribs and abuts against the main bar, the frame is inserted between the main bars to form the frame. When the bar is struck against the main bar with a hook-shaped gold plate and the reinforcing bar pushing and bending arm is brought into contact with the stirrups or ribs and pushed through the jack, the stirrups or ribs are wrapped around the main bar to improve dimensional accuracy. It has an effect that it can be bent and can facilitate the work of assembling the reinforcing bars on site.

[Brief description of drawings]

FIG. 1A is a sectional view showing a method of constructing a column stirrup, and B is a sectional view showing a method of constructing a beam rib.

FIG. 2 is a plan view showing a locus of deformation of a reinforcing bar to be bent.

FIG. 3 is a front view showing the operation during bending according to the embodiment of the present invention.

FIG. 4 is a side view as seen in the direction of the arrow in FIG.

5 is a partial side view as seen from the direction of the arrow of FIG.

FIG. 6 is a cross-sectional view taken along the arrow of Harha in FIG.

FIG. 7 is a sectional view taken along the line Nini in FIG.

FIG. 8 is a front view showing a mounting procedure according to an embodiment of the present invention, where A is an inserted state, B is a hooked state, and C is a bending state.

9A is a sectional view showing the construction of a conventional column stirrup, and B is a sectional view showing the construction of a conventional beam rib.

[Explanation of symbols]

 10 frame 11 cylinder type jack 12 pushing and bending arm 13 hook-shaped receiving

Claims (1)

[Claims] 1. A reinforcing bar bending apparatus for bending a strip or a rib when assembling a reinforcing bar, comprising: (a) a frame that can be inserted between main bars of the reinforcing bar; and (b) a cylinder-shaped frame. (B) a push-bending arm that is bendably supported via a jack and bends the stirrups or ribs;
An apparatus for bending a reinforcing bar, comprising a hook-shaped bracket which is integrally attached to the frame and holds a strip or a rib and impinges against the main bar.