JPH0465738B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Field of Application: The present invention is applicable to pre-assembling a reinforcing steel frame used in the construction of a building into a unit at a factory.
The present invention relates to a reinforcing bar bending device that can bend reinforcing bars to equalize the amount of bending of reinforcing bars used for arranging reinforcement for a three-dimensional wall.

Background of the invention and problems: Reinforcing bars used in the construction of buildings are usually bent according to the situation in which the reinforcing bars are arranged at work sites, and in order to assemble them, wires are used to bind the intersections of the reinforcing bars. has been adopted. Since such a method requires skilled workers and has low workability, there is a need for rationalization.

Therefore, it is being proposed to unitize such reinforcement work with the aim of improving efficiency. However, when reinforcing bars are simply lined up and combined into a planar grid, it is only necessary to consider the strain of the reinforcing bars used, but for example, building a wall with a bent cross section as shown in Fig. In such cases, if the reinforcing bars are bent unevenly, it becomes difficult to unitize them uniformly. This causes an increase in construction costs and is not suitable for manufacturing in a factory. Moreover, the operation of straightening the bent material requires a lot of effort, which is inconvenient.

Purpose of the Invention: In view of the above circumstances, the present invention has been developed to provide reinforcing bars used for walls having a bent cross section or similar structures, which are subject to irregularities in the amount of bending that occurs when vertically bending the reinforcing bars. The purpose is a reinforcing bar bending device that can be regulated and uniformly controlled using a presser mechanism.

Structure of the invention: In order to achieve the above object, the present invention installs two sets of electric reinforcing bar bending machines on a common base so that their arrangement interval can be adjusted, and The side bending machine is arranged so that it can only move forward and backward in a fixed position, and the secondary side bending machine is arranged so that it can move left and right and forward and backward, and the focus roller operates in the opposite direction to the primary side bending machine. In addition, a reinforcing bar clamp is also provided, and at the position on the reinforcing bar feed side to the primary reinforcing bar bending machine, a kerf plate and a receiving arm are arranged in a bell crank shape at a required angle so as to be in contact with the end of the reinforcing bar to be bent. A reinforcing bar holder that rotates by a predetermined angle only in the jumping direction and holds and regulates the end of the reinforcing bar with a receiving arm, a movable base that supports the reinforcing bar holder in combination with a one-way clutch, and a movable base that supports the reinforcing bar end by a receiving arm. A reinforcing bar end holding device is provided, which includes a support stand including a driving means that can move forward and backward with respect to the supply line, and a rotational driving means that is mounted on the movable stand and restores the reinforcing bar holding after activation. The configuration is as follows.

Effect: According to the device of the present invention, the spacing between the two reinforcing bars bending machines is set in accordance with the intended bending dimension of the reinforcing bars, and the reinforcing bar presser of the reinforcing bar end holding device is moved back. After feeding the reinforcing bars into the bending operation parts of both bending machines and clamping and fixing the reinforcing bars ahead of the bending part, first bend the rear parts of the required square reinforcing bars downward to the primary bending machine, and then insert the reinforcing bars into the bending machines. The presser foot is moved forward to wait above the bent reinforcing bars, the primary bending machine is moved back, and the secondary bending machine bends the middle part of the reinforcing bars upward by the required angle. When the bent rear end of the reinforcing bar is lifted, it comes into contact with the edge plate of the reinforcing bar holder, rotates the bellcrank-shaped reinforcing bar holder, and the rear end of the reinforcing bar returns downward due to the rebound. The reinforcing bar is received by the receiving arm of the reinforcing bar holder, and the amount of rebound of the reinforcing bar end during secondary bending is regulated, its lower limit is defined as a certain amount, and the bending dimension is adjusted as set. During operation, the rotation range of the reinforcing bar presser is restricted by an attached stopper, and it can freely rotate only in the kicking direction, and is prevented from rotating in the return direction by a one-way clutch. from,
Once the presser foot's edge plate is flipped up, the lower limit will be set. Therefore, in order to return to its original state and move on to the next operation, the reinforcing bar presser is returned to its original position by the drive machine and is put on standby. In addition, when the bending angle at the intermediate portion becomes large and the bending parallel dimension difference increases, the support position of the reinforcing bar presser is raised to accommodate this.

Embodiment: Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

In FIGS. 1 to 3, the base 1 has a step on its upper surface so that an appropriate part on the feed side of the workpiece (left side in the figure) is low, and the rest is slightly high.
On the upper surface of the high position, there is a guide rail 2 in the longitudinal direction.
2, 2' and a rack gear 3 are arranged in a row, and guide rails 4, 4 are arranged at required intervals on the upper surface of the lower side to be perpendicular to the longitudinal center line and support the primary bending machine 10 so that it can move forward and backward. . This primary bending machine 10 uses a known power-driven type. This bending machine 10 is directly connected to the output shaft of a reduction motor 11, and rotates a large-diameter fulcrum roller 12 and a force roller 14 attached at an appropriate distance via an arm 13 at an arbitrarily set rotation angle. The focus roller 14 is located on the upper side. And this primary bending machine 1
The support base 15 on which the 0 is mounted is moved forward and backward by a required stroke by a linear actuator such as an air cylinder 16, for example. 17 is a reinforcing bar receiver.

On the higher side of the base 1, a trolley 5 is placed which can be traversed on the guide rails 2, 2 and the guide rail 2' via rollers 6, 6, 6'. A secondary bending machine 10A is mounted with the axes parallel to each other, and the secondary bending machine 10A is also moved forward and backward by a linear actuator such as an air cylinder 8 along guide rails 7, 7 arranged on a trolley 5. The structure is the same as the primary bending machine 10, except that the force roller 14 is located below the fulcrum roller 12, and above the reinforcing bar receiver 17, along the frame 9, there is a clamp piece 18 and its operation cylinder. 1
8' is attached. Further, the cart 5 is configured to move laterally by meshing a pinion gear 22 at the end of a shaft 21 operated by a handle 20 provided at the lower part of the cart with a rack gear 3 fixedly provided on the base 1. The trolley 5 is equipped with a hook-shaped locking piece 24 that engages with the traversing guide rails 2, 2 and fixes the trolley 5.
The shaft 25 protruding from the upper side of the trolley 5
(Removable) The locking piece 24 can be operated to fix and release the locking piece.

At the front side of the base on which the bending machines 10 and 10A are mounted at required intervals, a reinforcing bar guide roller 27 and a centering device 28 are installed in the middle, and a buffer 31 is installed at the position after the secondary bending machine 10A. a guide roller 29 connected to and supported by a bracket 30;
are arranged respectively. The centering device 28 supports rollers arranged in a V-shape, for example, and allows the support to be moved and adjusted in the vertical direction by a reciprocating actuator.

A reinforcing bar end holding device 40 is installed adjacent to the workpiece feeding side of the primary bending machine 10.

As shown in FIGS. 4 and 5, this reinforcing bar end holding device 40 has a support 42 which is movably adjustable up and down on a support 41 whose base is fixed to the side surface of the base 1 and protrudes laterally. The support stand 42 is formed into a vertically elongated frame parallel to the primary bending machine 10, and groove-shaped guide rails 43, 43 are attached to the upper surface thereof in parallel and facing each other. A movable base 44 is movably mounted on the guide rails 43, 43 via flanged rollers 44', 44'.
The tip of the piston rod 45' of the internal air cylinder 45 is connected with a pin to a connecting piece 44'' vertically provided from the lower surface, so that it can move forward and backward with respect to the reinforcing bar supply line. In this case, a front upright type bracket 46 is fixed to the front end, and a one-way clutch 4 is mounted on a shaft 47 whose both ends are supported by bearing blocks 47', 47'.
A reinforcing bar presser 48 is provided in parallel with a receiving arm 48'' of a receiving arm 48'' of the receiving arm 48'', to which the main body is attached via a The rotation angle is regulated by a bracket 46 and stoppers 49, 49' attached to the end of the movable base.A chain wheel 50 attached to one end of the shaft 47 is connected to the output shaft of the reduction motor M mounted on the movable base 44. Wrap the chain around the chain wheel 51,
The reinforcing bar presser 48 is rotated only in the return direction, and a limit switch is provided at the lower limit stopper 49' to stop the drive. The support stand 42 is provided with a plurality of (four in the embodiment, but not limited to) support rods 42' with respect to the support stand 41 so that the vertical position can be set. The support rod 42' is inserted into a guide support hole 41'' of a boss 41' provided on the support base 41 so that the vertical position can be set according to the bending dimension difference h of the reinforcing bars (see FIG. 8).

According to the apparatus of the present invention configured as described above, the reinforcing bar end holding device 40 moves the piston rod 45' of the air cylinder 45 backward from the state shown in FIG. Both the primary and secondary reinforcing bar bending machines 10 and 10A are set at a distance I that corresponds to the bending of the reinforcing bars, and the force point rollers 14 and 14 of each machine are placed in the pre-start position. , respectively advance. In this forward state, each fulcrum roller 12, 12 and the effort roller 1
4 and 14 so that the reinforcing bar A to be processed is received.

In this state, guide roller 27',
27 and centering device 28 into a predetermined position. Next, the clamp 18 attached to the secondary reinforcing bar bending machine 10A is operated to clamp the reinforcing bar A (see FIG. 6).

Thereafter, by first driving the primary bending machine 10 to rotationally displace the force point roller 14 and the fulcrum roller 12 at a required angle, the reinforcing bar A is bent at a position sandwiched between both rollers 14 and 12 as shown in FIG. bend like that. The displacement angle of the force point roller 14 at this time is approximately the same as the bending angle of the reinforcing bar to be processed.

Next, the primary bending machine 10 is moved back to the retracted position by the air cylinder 45 built into the support base 42, and the engagement between the force point roller 14 and the fulcrum roller 12 is severed. In connection with this operation, the reinforcing bar end holding device 4
The movable base 44 of No. 0 is moved forward so that the edge plate 48' of the reinforcing bar presser 48 is positioned above the bent reinforcing bar end A' in a protruding state. After that, if the secondary bending machine 10A is driven and the required angle force point roller 14 and fulcrum roller 12 are rotationally displaced, the middle part of the reinforcing bar A is bent as shown in FIG. 8, and from this bent part The rear end, which is bent first, is lifted. The displacement angle of the force point roller 14 at this time is approximately twice the bending angle. At this time, the rear end of reinforcing bar A
Since A' is free, it exhibits a phenomenon in which it jumps up excessively as the middle part bends, and while the end part A' is jumping up, the edge plate 48' of the reinforcing bar retainer 48
When it comes into contact with this, the edge plate 48' is kicked up as a reaction and rotates to a position regulated by the upper limit stopper 49. This reinforcing bar end
Even if A' rises excessively due to the rebound and then descends, the receiving arm 48'' of the reinforcing bar presser 48, which was rotated by kicking the edge plate 48' first, remains in a predetermined position and waits as shown in Fig. 10. Then, attach the end of the reinforcing bar to this
A′ is received, and the receiving arm 48″ (rebar presser 4
8) is supported on the support shaft 47 in association with the one-way clutch 47'', so it cannot rotate in the opposite direction, and is therefore restricted by contact with this receiving arm 48''. Contact surface with arm 48″ and secondary bending machine 1
The bend is set so that there is a predetermined dimensional difference h between the straight part of the part beyond 0A (8th
(see figure). After that, the gripping force of the clamp 18 is released and the bent reinforcing bar is removed in preparation for the next work.

In addition, the arrangement of the stress rollers in the bending machine may be reversed to that described above, and the reinforcing bar pressers may also be combined so as to operate in the opposite direction.

Effects of the invention: As described above, according to the present invention, it is possible to prevent excessive movement of reinforcing bars and regulate the dimensions of secondary bending by utilizing the bending reaction during secondary bending, and to control the dimensions of secondary bending without applying additional power. This means that the bending dimensions can be accurately finished. Therefore, since uniform processing can be performed, unitization work at the factory can be easily performed.

[Brief explanation of the drawing]

Fig. 1 is a front view of the device of the present invention, Fig. 2 is a plan view, Fig. 3 is a right side view of Fig. 1, Fig. 4 is a partially cutaway front view of the reinforcing bar end holding device, and Fig. 5 is a FIG. 4 is a perspective view, FIGS. 6 to 10 are views showing operating modes, and FIG. 11 is a view showing one aspect of reinforcing bars arranged in a structure having a bent cross section. 1...Base, 3...Rack gear, 2, 2'4,
7... Guide rail, 5... Dolly, 8... Air cylinder, 10... Primary bending machine, 10A... Secondary bending machine, 12... Fulcrum roller, 14... Force roller, 15... Support stand, 16, 45... Air cylinder, 17... Rebar receiver, 18... Clamp piece, 1
8'... Clamp piece operating cylinder, 20... Handle, 22... Pinion gear, 24... Locking piece,
27, 27'... Reinforcing bar guide roller, 29... Guide roller, 40... Reinforcing bar end holding device, 41... Support stand, 42... Support stand, 43... Guide rail,
44...Movable base, 44'...Roller, 44''...Connection piece, 46...Bracket, 47...Shaft, 47''
...One-way clutch, 48...Rebar presser, 48'
...Button plate, 48''...Receiving arm, 49,49'...
Stopper, 50, 51...Chain wheel, M...Reduction motor, A...Reinforcing bar, A'...Reinforcing bar end, a...Reinforcing bar supply line.

Claims (1)

[Claims] 1 Two sets of electric reinforcing bar bending machines are arranged on the base so that the primary side bending machine can only move forward and backward toward the supplied reinforcing bars at a fixed position with respect to the feeding direction of the processed reinforcing bars, and the secondary side The bending machine is arranged so that it can move left and right and forward and backward, and has a force roller that operates in the opposite direction to the primary bending machine, and is equipped with a reinforcing bar clamp. The reinforcing bar holder whose rotational range is regulated and the reinforcing bar holder whose rotational range is regulated are arranged in a bell-crank shape, with the edge plate receiving rotational force due to contact with the reinforcing bar end and the receiving arm holding and regulating the reinforcing bar end. A movable base that provides shaft support in combination with a directional clutch, a support base that includes a drive means that allows the movable base to move forward and backward with respect to the reinforcing bar supply line, and a support base that is mounted on the movable base and restored after the reinforcing bar press is activated. What is claimed is: 1. A reinforcing bar bending device, characterized in that a reinforcing bar end holding device is provided.