JPH0666833U - Rebar bending correction device - Google Patents

Abstract

(57) [Summary] [Purpose] Reinforcing bars protruding from a concrete base that have been bent from their roots are returned to their original straight state.
Provide a compact and portable device to the market. [Structure] The hydraulic cylinder 11 is provided with a hook 18 that can be engaged with the base of the reinforcing bar B, and a bifurcated reinforcing bar pressing member 14 for pressing the reinforcing bar B is provided at the tip of a piston rod 13 that moves integrally with the piston 12. The hydraulic cylinder 11 is provided with a stabilizer 21 at the rear end thereof, the hook 18 is engaged with the base of the reinforcing bar B, and the side surface of the reinforcing bar B slightly above this is attached to the reinforcing bar pressing member. Press with 14,
Be sure to reinforce bar B.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an apparatus for straightening a bent reinforcing bar of a joint between a foundation of a structure and a superstructure again.

[0002]

[Prior art]

 In the part where the upper structure is connected to the foundation of the conventional structure, the upper part of the reinforcing bar B of the reinforced concrete pile A that was driven into the ground is exposed on the base, and after bending it radially outward, the upper structure is formed in the center. The steel frame C for the frame is installed, and then each of the reinforcing bars B is returned straight again, and these are integrated by welding or the like.

In the conventional work of this type, the reinforcing bar usually has a diameter of 19 to 51 mm, but when it is opened outward, it can be bent relatively easily by the manual work of a worker.

However, when restoring the original shape of these reinforcing bars B, since the steel frame C of the upper structure is already installed in the central part, a large tool cannot be used, and the returning work by human power is also difficult for the above-mentioned upper structure. Steel frame C gets in the way and I can't work. Therefore, after almost returning, the base of the reinforcing bar is tapped with a hammer or the like, but it does not return to the original state quite easily, and it is difficult to return it evenly, which requires a great deal of labor and labor. In addition, the conventional steel frame bender can bend and return at a position away from the root, but cannot restore the bent one from the root as described above.

[0005]

[Problems to be solved by the device]

 Therefore, the present invention is to make it possible to accurately and easily correct even a rebar bent from the root of a protruding surface to the original straight state by using a simple tool. . Another object is to provide a tool that allows the tool to be maintained in a substantially constant posture and to perform work accurately and safely, even if the ground supporting the tool is not always uniform and there is some height. That is.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention has a hook arm member fixed to one end of a hydraulic cylinder of a hydraulic cylinder device, the hook arm member extending in a radial direction of the cylinder and further curved in an axial direction. A hook that can engage with the reinforcing bar is integrally provided at the tip of the piston, and the outer end of the piston rod that is integral with the piston of the hydraulic cylinder device is outside the piston and extends toward the tip of the hook arm member. Has a fork-shaped rebar pressing member fixed thereto, and the stroke of this rebar pressing member is from the position close to the hydraulic cylinder to the vicinity of the hook, and the other end of the cylinder extends in the radial direction. The reinforcing bar bending correction device is characterized in that a stabilizer having supporting legs is attached. Further, in order to achieve the above-mentioned object, the stabilizer of the rebar bending straightening device of the present invention is rotatably fixed around the axis of the hydraulic cylinder, and 2 to 4 pieces are radiated at right angles to the axis. It is preferable that the supporting legs having different lengths are formed so as to project. Further, in order to achieve the above-mentioned object, it is preferable that the hook arm member of the rebar bending correction device of the present invention is detachably attached to the hydraulic cylinder.

[0007]

[Action]

 In order to restore the bent rebar by using the device according to the first or second aspect of the invention, the hydraulic cylinder is connected to the hydraulic pump by using a suitable hydraulic hose. Then, the hook part is hooked at the base of the bent reinforcing bar, and a bifurcated reinforcing bar pressing member is applied to the inclined reinforcing bar, and the supporting leg extending in the radial direction at the rear end of the hydraulic cylinder is grounded. Abut the surface.

Next, when pressure oil is sent into the cylinder by the hydraulic pump, the piston and the piston rod move forward, and the reinforcing bar pressing member presses the reinforcing bar. At this time, a reaction acts on the hydraulic cylinder, but since a hook integral with this reacts with the base of the reinforcing bar, the hydraulic cylinder stops there, and the piston, the piston rod and the reinforcing bar pressing member move forward and bend. Straighten the existing reinforcing bar using the root as a fulcrum. When completely extended, the hydraulic pump is stopped and the pressure of the hydraulic oil in the hydraulic cylinder is removed, and the piston is retracted manually or by spring force, and the device is disengaged from the engaged rebar and the next bent rebar Then, the same work is repeated.

According to the second aspect of the present invention, the stabilizer is appropriately rotated about its axis, and the optimum length of the support legs is selected from the support legs of different lengths so that the axial direction of the device is substantially horizontal. Select and use. According to the third aspect of the invention, since the hook arm member is detachable, when it is damaged, the hook arm member is replaced with a new hook arm member or the bifurcated hook arm member is replaced.

[0010]

【Example】

 In the figure, 10 is a hydraulic cylinder device, in which a piston 12 is reciprocally mounted in a hydraulic cylinder 11, and a piston rod 13 integrated with the piston 12 projects axially outside the hydraulic cylinder 11 and has a two-pronged tip. The reinforcing bar pressing member 14 is fixed.

The piston 12 is moved by the hydraulic pressure in the direction in which the piston rod 13 projects, and when it is returned, the compression spring 15 provided in the hydraulic cylinder 11 is used. Reference numeral 16 is a hook arm member, the base 17 of which is integrally attached to and detached from the end surface of the hydraulic cylinder 11 from which the piston rod 13 projects, and d = about 5 to 15 cm from the base 17 in the radial direction of the hydraulic cylinder 11. Further, it extends in parallel with the piston rod 13 and a hook 18 is formed at the tip thereof, and in the embodiment of the axial length of the hook arm member 16, it is formed to be 25 to 35 cm. The hook arm member 16 described above is preferably made of forged iron, but may be a bent steel pipe bent and may be made of any material as long as it is durable.

The stroke of the piston 12, the piston rod 13 and the reinforcing bar pressing member 14 is 20 to 25 cm, and the dimension L between the hook 18 and the reinforcing bar pressing member 14 is about when the reinforcing bar pressing member 14 is most retracted. It is 20 to 25 cm. These dimensions themselves are not particularly limited, and may be a little larger as long as they are easy to carry and do not hinder the handling.

An oil supply port 19 is provided near the rear end of the hydraulic cylinder 11, and is connected to a hydraulic pump (not shown) by an appropriate hydraulic hose 20. At the rear end of the hydraulic cylinder 11, a stabilizer 21 that rotates around this axis is installed, and three support legs 22 having different lengths are radially projected in the radial direction. The length differs by 10 mm. This stabilizer 21 can be stopped at an arbitrary phase by a set screw 23. FIG. 5 shows a bifurcated hook arm member 16a, the base portion 17a of which has the same gauge as the hook arm member 16 and is detachably attached to the hydraulic cylinder 11. Hooks 18a and 18b are provided at the tips of the arms, respectively.

Since the operation of the embodiment performs all the operations of each claim, the repeated description will be omitted. The only difference is that the stabilizer 21 has three different support legs 22. Therefore, rotate this in any direction by 120 ° to select the support leg 22 on which this device is supported horizontally, and set screw 23 Use it after fixing the stabilizer 21 to the hydraulic cylinder with. As shown in FIG. 5, when the forked hook arm member 16a is used, the hook arm member 16 is replaced, the two hooks 18a are engaged with the reinforcing bar, and the bifurcated reinforcing bar pressing member 14 is applied in the middle thereof. Press to bend the rebar.

[0015]

[Effect of device]

 In the device according to the first aspect of the present invention, which is constructed and acts as described above, even if the reinforcing bar protrudes from the ground and is bent from the root, the hook is engaged with the root of the reinforcing bar, and a little more than this. By applying the reinforcing bar pressing member to the upper part and pressing the reinforcing bar pressing member by hydraulic pressure, the reinforcing bar can be easily and accurately corrected to the original straight state.

Further, even while the hydraulic pressure is being pressed, the rear end of the hydraulic cylinder is supported by the ground on the stabilizing base, the posture of the hydraulic cylinder is stable, and the hydraulic cylinder is not directly pressed against the ground.

According to the second aspect of the present invention, the support base is provided with three support legs of different lengths which are rotatable about the axis of the hydraulic cylinder, so that the ground supporting the cylinder is somewhat high. Or, even if it is low, by selecting and using a supporting leg of an appropriate length from these supporting legs, the hydraulic cylinder can be held almost horizontally. According to the third aspect of the present invention, the hook arm having one arm or the one having a forked shape can be selectively selected to perform bending or bending back in the middle of the reinforcing bar or bending back work from the root. .

In the apparatus of the embodiment, in addition to all the effects of the invention described in each of the above claims, the stroke of the reinforcing bar pressing member 14 is at most 20 to 25 cm and the total length is about 60 cm, so that it can be carried and installed. It is not necessary to take it, it can be fully used at the construction site, and it is most suitable for bending back work of the most used rebar diameter 19 to 51 mm.

[Brief description of drawings]

FIG. 1 is a partially longitudinal side view of this device.

FIG. 2 is a plan view of FIG.

FIG. 3 is a front view of a stabilizer.

FIG. 4 is a schematic side view showing a relationship between a foundation pile of a structure and a superstructure.

[Explanation of symbols]

 10 Hydraulic Cylinder Device 11 Hydraulic Cylinder 12 Piston 13 Piston Rod 14 Reinforcing Bar Pressing Member 16 Hook Arm Member 18 Hook 21 Stabilizer 22 Support Leg

[Procedure amendment]

[Submission date] July 21, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Figure 5

[Correction method] Added

[Correction content]

FIG. 5 is a perspective view of a bifurcated arm.

Claims (3)

[Scope of utility model registration request] 1. A hook arm member, which extends in the radial direction of the cylinder and is bent in the axial direction, is fixed to one end of a hydraulic cylinder of the hydraulic cylinder device, and a hook is engaged with a reinforcing bar at the tip of the hook arm member. Is provided, and the outer end of the piston rod integrated with the piston of the hydraulic cylinder device is outside the piston and extends in the direction of the tip of the hook arm member. Is fixed, and the stroke of the reinforcing bar pressing member is from the position close to the hydraulic cylinder to the vicinity of the hook, and the other end of the cylinder is attached with a stabilizer having a supporting leg extending in the radial direction. Rebar bending correction device characterized by the above. 2. The stabilizing base is rotatably fixed around an axis of the hydraulic cylinder, and is formed by radially projecting two or four supporting legs having different lengths at right angles to the axis. The reinforcing bar bending straightening device according to claim 1, wherein 3. The reinforcing bar bending correction device according to claim 1, wherein the hook arm member is detachably attached to the hydraulic cylinder.