JP2000135518A - Long material bending device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a long material bending device which can easily and quickly change a bending length of a long material such as a reinforcing bar and, is easy to replace an initial setup. SOLUTION: A steel bar X penetrating between a catching shaft 31 and a turning roller 32 of a bending machine 3 is positioned at a given position by a stopper 2. Under this condition, the steel bar X is bent from a given part by turning the turning roller 32 with the catching shaft 31 as a center. After that, the steel bar X bent is clamped with a second clamp 41 and is transferred by a transfer device 4. Thus, a next bending portion of the steel bar X can be arranged between the catching shaft 31 and the turning roller 32. Therefore, the steel bar X can be bent again by turning the turning roller 32 again. The steel bar X can be bent in a desired shape by repeating the above mentioned action thereafter whenever it is necessary.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a long bending device for bending a long material such as a reinforcing bar, a pipe material, and a wire material at a plurality of positions.

[0002]

2. Description of the Related Art Conventionally, when constructing a concrete column, it has been practiced to arrange horizontal bars at a constant pitch with respect to vertical main bars and to reinforce them. This transverse streak generally has four rebars.
After bending at a location, the ends are butt-welded to form a square or rectangular frame. As shown in FIG. 5, as a bending device for bending the reinforcing bar, a bending machine 103 having a locking shaft 101 and a turning roller 102 that can turn around the locking shaft 101 is horizontally mounted on one surface of a substrate 104. Four arrangements are provided at predetermined intervals along the direction. In this bending apparatus, the reinforcing bar X is manually inserted between the locking shaft 101 of each bending machine 103 and the turning roller 102, and the bending machines 103 located on both sides are formed.
By rotating the revolving rollers 102 about 90 ° in opposite directions to each other, the both ends of the reinforcing bar X are bent (see the two-dot chain line in FIG. 5), and the respective bending machines 103 located at both ends are locked. The shaft 101 is pulled into the inside of the substrate 104 so that the bent portion of the reinforcing bar X is in a free state, and in this state, the turning rollers 102 of the two bending machines 103 located in the middle are turned by approximately 90 ° in opposite directions to each other. Thus, the intermediate portion of the reinforcing bar X is bent to form a frame (see FIG. 6).

[0003]

When the bending device changes the bending length (side length) of the horizontal streak X, it is necessary to adjust the position of the bending machine 103 in the horizontal direction according to the bending length. Therefore, there is a problem that a great deal of time and labor is required for the changeover. The present invention has been made in view of the above problems, and has as its object to provide a bending device that can easily and quickly change a bending length of a long member such as a reinforcing bar.

[0004]

According to a first aspect of the present invention, there is provided an apparatus for bending a long material, comprising: a locking shaft; and a turning roller rotatable around the locking shaft. A bending machine for rotating and bending a long material inserted between a shaft and a turning roller, and a stopper for positioning the long material inserted between the locking shaft and the turning roller. A clamp that clamps the long material bent by the bending machine, a slider that holds the clamp so that the clamp can move linearly, a drive unit that drives the slider, and a control unit that controls the amount of movement of the slider. And a transfer device for transferring the long material clamped by the clamp and arranging the next bent portion of the long material between the locking shaft and the turning roller ( Claim 1).

[0005] In the bending device for a long material having the above-mentioned structure, the long roller inserted between the locking shaft and the turning roller is positioned at a predetermined position by a stopper, and the turning roller of the bending machine is moved. By turning, the long material can be bent from a predetermined portion. Next, the turning roller is turned in the opposite direction to return to the original position, and the bent long material is clamped by the clamp. By driving the slider by the driving unit in this state, the long material is transferred together with the clamp. By controlling the transfer amount of the long material by the control unit, the next bent portion of the long material can be arranged between the locking shaft and the turning roller. Then, by releasing the clamp of the long material by the clamp and turning the turning roller again,
The long material can be bent at the next bending point. Thereafter, if necessary, the transfer of the long material by the slider and the bending by the bending machine are alternately repeated, whereby the long material can be bent into a desired shape. According to the long material bending apparatus, the bending length of the long material at the time of the first bending can be changed only by changing the positioning position of the long material by the stopper. Further, the bending length at the time of the second or subsequent bending can be changed only by changing the transfer amount of the long material by the control unit.

The stopper is preferably attached to a slider (claim 2). In this case, the position of the stopper can be changed by controlling the amount of movement of the slider by a control unit.

[0007] It is preferable that the bending device for a long material includes a conveyor for feeding the long material along a longitudinal direction thereof and passing the long material between the locking shaft and the turning roller. . According to this bending device, the long material can be automatically passed between the locking shaft and the turning roller by the conveyor.

[0008] The stopper may be adapted to receive the leading end of the long material inserted between the locking shaft and the turning roller to perform positioning of the long material. Therefore, the structure of the stopper can be simplified.

[0009]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a plan view showing a long material bending apparatus of the present invention, and FIG. 2 is a front view. The device for bending a long material includes a conveyor 1 for feeding a reinforcing bar X as a long material along a longitudinal direction thereof,
A stopper 2 for positioning the reinforcing bar X fed by the conveyor 1 at a predetermined position; a bending machine 3 disposed between the conveyor 1 and the stopper 2 for bending the reinforcing bar X; The main part is constituted by the transfer device 4 that transfers the toner linearly.

The conveyor 1 has a pair of pulleys 11.
The reinforcing bar X is loaded on the belt 12 and fed toward the stopper 2. The belt 12 is endlessly rotated by a geared motor 12 connected to a rotation shaft of one pulley 11. Above the other pulley 11, a pressing roller 13 for sandwiching the reinforcing bar X between the pulley 11 and the pulley 11 is provided so as to be able to move up and down in the vertical direction.

The stopper 2 is made of a flat metal plate, and is arranged on the feed path Y of the reinforcing bar X by the conveyor 1. The stopper 2 strikes the tip of the reinforcing bar X fed by the conveyor 1
The rebar X is positioned at a predetermined position. This stopper 2
The bending length L1 (see FIG. 3A) of the reinforcing bar X at the time of the first bending is defined by the positioning of the reinforcing bar X according to. As described above, since the stopper 2 only abuts the tip of the reinforcing bar X, its structure can be extremely simplified. The stopper 2 is mounted on a slider 42 of the transfer device 4 which will be described later.
2, the rebar X can be moved along the feed path Y, and by this movement, the bending length L1 of the rebar X at the time of the first bending can be adjusted. When the reinforcing bar X hits the stopper 2, a sensor (not shown) detects this and stops driving the conveyor 1.

The bending machine 3 includes a locking shaft 31 and a turning roller 32 which are opposed to each other with a feed path Y of the reinforcing bar X therebetween, a driving unit 33 for driving the turning roller 32 to rotate, and a locking shaft 3.
1 and a first clamp 34 for clamping the reinforcing bar X fed between the rotating roller 32 and the first roller 34. The locking shaft 3
1 is a drive unit 33 with its axis oriented vertically.
Projecting from the upper part of the turning arm 33a. The axis of the locking shaft 31 coincides with the pivot axis of the pivot arm 33a. The turning roller 32 is rotatably mounted on a support shaft 32a, and the support shaft 32a is rotated by the turning arm 33 with its axis oriented in the vertical direction.
It is set up on the upper part of a. The swing arm 33a includes:
Swivel shaft 33c rotatably supported by bearing member 33b
And is integrated with the upper end. The turning shaft 33c is driven by the geared motor 33e to drive the gear box 3
It is rotationally driven through 3d. The swing arm 3
The turning position of 3a can be detected by a pulse generator 35 connected to an output shaft of a gear box 33d via a belt 34. The first clamp 34 includes a fixing member 34a that is disposed to face the feed path Y of the reinforcing bar X.
And a movable member 34b, and a fluid pressure cylinder (not shown) for moving the movable member 34b toward and away from the fixed member 34a
The rebar X fed between the locking shaft 31 and the turning roller 32 can be sandwiched and fixed.

The transfer device 4 includes a second clamp 41 for clamping the reinforcing bar X bent by the bending machine 3, a slider 42 for holding the second clamp 41, and a driving unit 43 for linearly moving the slider 42. And a controller 44 for controlling the amount of movement of the slider 42. The second
The clamp 41 includes a pair of clamp pawls 41a that can be opened and closed about an axis Q, and a link 41 formed by a fluid pressure cylinder 41b.
It is driven to open and close via the switch c. The second clamp 41 is held by a slider 42 via a bracket 42d, and its clamp claw 41a is arranged in a floating state to the left of the slider 42 in FIG. The pair of clamp claws 41a can be arranged just above the bent side X0 on the distal end side of the reinforcing bar X in the opened state, and by closing the clamp claws 41a at this position, the bent side X0 can be clamped. it can.

The slider 42 is provided movably along a linear track 42a arranged on the gantry B. This linear track 42a guides the traveling of the slider 42,
The slider 42 is moved in parallel with the feed path Y of the reinforcing bar X. The drive unit 43 detects a rack 43a provided along the linear track 42a, a pinion 43b meshed with the rack 43a, a geared motor 43c for driving the pinion 43b to rotate, and the number of rotations of the pinion 43b. And a pulse generator 43d.

Referring to FIG. 4, a control unit 44 includes a microcomputer A, and includes a pulse generator 43d.
By controlling the drive of the geared motor 43c of the drive unit 43 by using the signal from the controller as an input, the movement amount of the slider 42 is controlled. The control unit 44 inputs the bending lengths L1 to L4 (see FIG. 3) from the time of the first bending to the time of the last bending of the rebar X, and the rebar X based on the input value of the input unit 44a. A calculation unit 44b for calculating the amount of movement of the slider 42 from the step of abutting the stopper 2 to the completion of all bending steps, including the direction of movement,
A comparison discriminator 44c for comparing and discriminating whether or not the amount of movement of the slider 42 matches a value calculated by the calculator 44b, based on a signal from the calculator 44b and a signal from the pulse generator 43d; An output unit 44d that controls the rotation of the geared motor 43c of the drive unit 43 including the rotation direction based on the determination signal from the drive unit 44c.

Next, the operation of the bending apparatus having the above configuration will be described with reference to FIG. First, after moving the slider 42 from the home position P to a position corresponding to the initial bending length L1 of the reinforcing bar X, the reinforcing bar X is fed by the transport conveyor 1 and the locking shaft 31 of the bending machine 3 and the turning roller 32, and the leading end of the insertion is brought into contact with the stopper 2 (see FIG. 3A). Thereby, the first bent portion (first bent portion) C <b> 1 of the reinforcing bar X can be arranged between the locking shaft 31 and the turning roller 32.

Next, the driving of the conveyor 1 is stopped, and the rebar X is clamped by the first clamp 34 to maintain the rebar X in an immobile state. Thereafter, the driving roller 33 of the bending machine 3 causes the turning roller 32 to turn approximately 90 ° in the counterclockwise direction in FIG. 3 to bend the reinforcing bar X by 90 ° at the first bending point C1 (see FIG. 3B). Next, the revolving roller 32 is reversed to return to the original position, and the slider 42 is moved to the left in the figure, so that the opened clamp claw 41a is moved directly above the first bending side X1 of the reinforcing bar X. Then, the clamp pawl 41a is closed by the fluid pressure cylinder 41b, and the first bent side X1 is clamped by the second clamp 41. Then, the clamp of the reinforcing bar X by the first clamp 34 is released, and the slider 42 is moved to the second clamp 41.
And is moved rightward by a distance corresponding to the second bending length L2. Thereby, the rebar X is transferred to the right,
The second bent portion C2 is connected to the locking shaft 31 and the turning roller 32.
(See FIG. 3c).

Further, after the rebar X is released from being clamped by the second clamp 41 and the rebar X is again clamped by the first clamp 34, the revolving roller 32 is turned approximately 90 ° in a counterclockwise direction to rebar the rebar X. It is bent 90 ° at the second bending point C2 (see FIG. 3d). Thereafter, the revolving roller 32 is reversed to return to the original position, and the slider 42 is moved to the left to clamp the second bent side X2 of the reinforcing bar X by the second clamp 41. Next, the clamping of the reinforcing bar X by the first clamp 34 is released, and the slider 42 is moved rightward by a distance corresponding to the third bending length L3, so that the third bending point C3
Is disposed between the locking shaft 31 and the turning roller 32 (see FIG. 3E).

Thereafter, in the same manner as described above, the reinforcing bar X is bent 90 ° at the third bending point C3 by the bending machine 3 (see FIG. 3f), and then the third bar 41 of the reinforcing bar X is bent by the second clamp 41.
And bending the slider 42 to the right by a distance corresponding to the fourth bending length L4 to move the fourth bent portion C4 between the locking shaft 31 and the turning roller 32. (See FIG. 3g), and the bending machine 3 bends the reinforcing bar X at the fourth bending point C4 by 90 ° (see FIG. 3h). As described above, the rectangular frame D made of the reinforcing bar X can be automatically manufactured, and the frame D can be manufactured continuously by repeating the same steps as described above. Then, a horizontal streak can be obtained by welding the ends of the reinforcing bars X.

According to the bending device, the bending length L1 of the reinforcing bar X at the time of the first bending can be changed only by adjusting the position of the stopper 2 by the transfer device 4. Also,
Only by inputting the bending lengths L1 to L4 from the first bending to the final bending of the reinforcing bar X to the input unit 44a of the control unit 44, the transfer amount of the reinforcing bar X by the transfer device 4 can be changed. The reinforcing bar X can be bent to a desired size. Therefore, the setup change can be performed easily and quickly, which is suitable for multi-product small-lot production. In particular, since the stopper 2 is also automatically moved by the transfer device 4, the setup change can be performed more easily and quickly. Also,
Since the reinforcing bar X can be automatically supplied by the conveyor 1, labor saving can be achieved. Further, the position of the reinforcing bar X at the time of completion of the bending step (the fourth bent portion C
Since 4) is always constant irrespective of the size of the frame D, it is easy to automatically transfer the frame D to the next process such as a welding process.

The stopper 2 may be provided separately from the slider 42. In this case, the position at which the reinforcing bar X abuts may be manually adjusted. Further, the conveyor 1 may supply the reinforcing bar X to the bending machine 3 from a direction orthogonal to the illustrated feeding path Y. However, the transport conveyor 1 is configured as needed, and may naturally be configured to supply the reinforcing bar X manually. In addition, in the said embodiment, although the case where the rebar X was bent as a long material was illustrated, it is of course possible to bend other long materials, such as a pipe material and a wire, and the number of times of bending is also possible. Can also be arbitrarily selected.

[0022]

As described above, according to the apparatus for bending a long material according to the first aspect, the bending length at the time of the first bending of the long material is changed only by changing the position of the positioning of the long material by the stopper. Can be changed, and the bending length at the time of the second or subsequent bending can be changed simply by changing the transfer amount of the long material by the control unit, so that the setup can be changed easily and quickly. be able to.

According to the second aspect of the present invention, since the stopper is attached to the slider, the position of the stopper is automatically changed by controlling the amount of movement of the slider by the control unit. Can be. For this reason,
The initial bending length can be easily set.

According to the long bending device of the third aspect, the long material can be automatically passed between the locking shaft of the bending device and the turning roller by the transport conveyor, thereby saving labor. It can be achieved effectively.

According to the apparatus for bending a long material according to the fourth aspect, the stopper receives the leading end of the long material inserted between the locking shaft and the turning roller, so that the structure is simplified. can do.

[Brief description of the drawings]

FIG. 1 is a schematic plan view showing one embodiment of a long material bending apparatus of the present invention.

FIG. 2 is also a schematic front view.

FIG. 3 is a schematic view showing a bending step.

FIG. 4 is a schematic diagram showing a control unit.

FIG. 5 is a schematic view showing a bending step of a conventional example.

FIG. 6 is a schematic view showing a bending step of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Conveyor 2 Stopper 3 Bending device 31 Locking shaft 32 Revolving roller 4 Transfer device 41 Second clamp 42 Slider 43 Drive unit 44 Control unit C1 First bending point C2 Second bending point C3 Third bending point C4 4 bend points X rebar

Claims (4)

[Claims] An elongating member having a locking shaft and a revolving roller rotatable about the locking shaft, the revolving roller rotating a long material inserted between the locking shaft and the revolving roller. A bending machine that bends; a stopper that positions a long material inserted between the locking shaft and the turning roller; a clamp that clamps the long material bent by the bending machine; A slider for movably holding the slider, a driving unit for driving the slider, and a control unit for controlling the amount of movement of the slider; A transfer device for arranging a bent portion of the long material between the locking shaft and the turning roller. 2. An apparatus according to claim 1, wherein said stopper is attached to a slider. 3. An apparatus for bending a long material according to claim 1, further comprising a conveyor for feeding the long material along the longitudinal direction thereof and passing the material between the locking shaft and the turning roller. 4. The apparatus for bending a long material according to claim 1, wherein the stopper receives the tip of the long material inserted between the locking shaft and the turning roller to position the long material.