JPH0234220A - Continuous bending device for lengthy stock, continuous bending method and working method for hoop reinforcing bar - Google Patents

Abstract

PURPOSE:To enable continuous bending the lengthy stock by providing bender heads of both sides movably on the subject positions to the central bender head and providing a sliding clamp movably to hold the lengthy stock. CONSTITUTION:Considering the length of the reinforcing steel 48 to be bend, the position of a positioning stopper 86 is set to position the bender heads 14-2 near the center. Then, a motor 50 of the bender-heads 14-1, 14-3 are started to drive and to rotate a driving shaft 16, corresponding to the length of a hook to position inwards on the front end and rear end of the reinforcing steel 48, the left and right bender-heads 14-1, 14-3 are moved simultaneously. As the bender-heads are moved to the prescribed position, during the bending, these are fixed on that position. Each cylinder 25 of the bender-heads 14-1, 14-3 to perform the bending is driven to advance a piston 28, to insert the guide hole 28 provided on the front end of the piston loosely into the guide pin 30 of the main frame and to cover upwards the reinforcing steel, the bending work is performed by using the piston as the central roller.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention is equipped with a center guide that can move forward and backward in the axial direction, and by retracting the center guide when unnecessary, it is possible to continuously bend a long object. The present invention relates to a continuous bending device and a continuous bending method for long objects.

[Conventional technology]

Generally, in long object bending equipment, long objects such as reinforcing bars and iron pipes are placed between a center guide such as a center roller and a bending roller that can rotate around the center guide. Ru. One bending roller rotates (revolutions) around the center guide, thereby bending the long object to a desired angle. During bending, a long object that is held between the center guide and the bending roller will try to escape to the side, so the long object must be brought into contact with the stopper to prevent it from escaping. The bending processes that are prevented are right angle bending (so' bending) and hook bending (135°
bending), anchor bending (180° bending), etc. For long objects, these bending processes are often performed continuously.

It is being done. For example, by anchor-bending both ends of a reinforcing bar, an anchor bar (see FIG. 11(^), number of bending operations = 2) is formed. Here, if the bending angle is 135°, hooks of 135° are formed at both ends, as shown by the dashed line in FIG. 11(A), and when two hook bends are combined with two right angle bends, , stirrup muscle (Fig. 11 (B
) Reference, number of bending processes: 4) is formed. Also, if you add three right angle bends to the two hook bends, the hoop muscle (
Refer to FIG. 11(C), number of bending processes: 5) is formed.

Anchor muscles, stirrup muscles, and hoop muscles are widely used as columnar muscles.

The anchor muscles, stirrup muscles, and hoop muscles shown in FIGS. 11(A), (B), and (C) are examples.
A 135° hook may be provided at the end of the anchor bar,
Also, although 135° hooks are common, 90135
A hook may be provided at the end of the stirrup bar or hoop bar.

In order to efficiently perform such continuous bending,
A continuous bending machine for long objects, in which bender heads equipped with a center guide and bending rollers are arranged side by side on a main frame, is known for its continuous bending of long objects. In response to the number of processes (=5), a continuous bending apparatus is generally configured as a so-called five-head type in which five bender heads are arranged in parallel. In this type of continuous bending device, the center guide of the bender head is configured to move forward and backward in the axial direction. Then, in order not to interfere with the feeding of the long object, the center guide of the bender head that does not perform one bending process is moved back, and is removed from the trajectory of the long object during the bending process (the bending trajectory of the long object). For example, a hoop line is formed by a continuous bending apparatus for a long object in the following manner.

If the lengths of the hook, short side, and long side of the hoop line to be molded are a, X, and Y, respectively (see FIG. 11(C)), the five bender heads 114-1 to 114-5 form the hoop line. As shown in FIG. 12, the distances 1, v141, xl, xl, and a+ are arranged in parallel and separated from each other by a predetermined distance, as shown in FIG. 12 (see FIG. 12(A)).

After setting the five bender heads 114-1 to 114-11 to the predetermined positions, first, while all the center guides 22 are moved forward, the bender heads 114-1 to 114 at both ends are moved.
-5 bending rollers 24 are rotated approximately 135" in opposite directions, both ends of the reinforcing bar are bent by 135 degrees.

Hook bending of both ends is done at the same time (Figure 12 (B)
reference).

After that, the bender heads 114-1, 114 on both sides
-5 center guide 22 is moved backward, and the reinforcing bar bend 1 (
After removal from the trajectory (the center guide in the retracted position is indicated by When rotated, two right angle bends are made at the same time (see Figure 12(b)).

Furthermore, the center guide 2 of the bender head 114-2
2 (see FIG. 12(E)), and the bending roller 24 of the central bender head 114-3 is rotated about 806 turns to perform the final right-angle bending, thereby forming the desired hoop line.

According to such a continuous bending device, a long object such as a reinforcing bar can be continuously bent by appropriately controlling the forward and backward movement of the center guide and the rotational movement of the bending roller.
Continuous bending of long objects can be performed quickly and easily. Further, even complicated hoop lines can be easily formed without moving the bender head during processing.

In addition, after hook bending the bender heads 114-1 and 114-5 at both ends, the second and fourth bender heads 1
In such a configuration, the bender heads 114-2 and 114-4 can be omitted, and the continuous bending device for long objects can be , it is sufficient to have three bender heads, and it can be configured as a three-head type.

[Problem to be solved by the invention]

In a configuration with five bender heads installed side by side (five-head type), once the bender head and reinforcing bar are set in the predetermined position according to the final shape of the workpiece, feeding of the long workpiece can be performed during the bending process. Continuous bending can be performed without adding or moving the bender head, and complex hoop lines can be formed quickly and easily. However, since five bender heads are required, the continuous bending apparatus for long objects becomes structurally complex and cannot be produced at low cost.

On the other hand, if the bender heads at both ends are moved during the bending process, a continuous bending apparatus for long objects can be constructed from three bend heads. With this three-head type, loops can be formed by reciprocating the bender heads at both ends by - degrees for each bending cycle between the positions at both ends for hook bending and the inner position for right-angle raising. .

Incidentally, even in the construction IK of a medium-sized building, about 500 to 3000 hoop muscles are required, and even if 5 trees are processed at the same time, the bending cycle is repeated 100 to 600 times. Therefore, it is necessary to reciprocate the bender head at both ends 100 to 600 times, corresponding to the number of bending cycles. Such manual adjustment of the bender head is complicated and does not ensure high workability.

Furthermore, in known continuous bending machines for long objects, not only the feed of the long object but also the feed of the bender head is manually adjusted, making it difficult to achieve accurate positioning and high processing accuracy. .

By configuring the bender heads at both ends to be moved mechanically by the control means, the drawbacks of the configuration in which the bender heads are manually moved can be overcome.

However, the bender head with center guide and bending roller is relatively heavy, and the reciprocating motion of the heavy pen head must be precisely controlled, so a relatively large and precise motor is required to control the bender head. It is necessary to construct a means for continuous bending of long objects, and the structure of the apparatus for continuous bending of long objects becomes complicated and cannot be produced at low cost.

Although this invention is a three-head type, once the bender heads at both ends are set at a predetermined position, a series of bending Y can be performed continuously on the long object by simply feeding the long object. The present invention aims to provide a continuous bending device and a continuous bending method, for example, a method for processing hoop lines.

[Means to solve the problem]

In order to achieve this purpose, for example, according to the continuous bending device for R fabric of the present invention, one of the three bender heads on both sides can be moved to a symmetrical position with the central bender head in between. will be placed in For example, the bender heads on both sides are configured to be movable synchronously and symmetrically using drive shafts threaded in opposite directions. A sliding clamp that clamps and conveys a long object is slidably provided on the main frame.

[Effect]

With this configuration, once the bender heads at both ends are set at the predetermined positions, continuous bending of the long object can be performed simply by reciprocating the long object a predetermined distance using the sliding clamp, and the bending process can be performed continuously during the bending process. , eliminating the need to move the bender heads at both ends.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

As shown in FIG. 1, a continuous bending apparatus at10 for long objects according to the present invention is equipped with a main frame 12 formed by combining shaped steel, etc. , a drive shaft 1e, a sliding clamp 1B, a position detection means 20, etc. are provided.

The three bender heads 14 (14-1 to 14-3) are
The bender heads 14-1 and 14-3 are arranged in parallel in the long direction of the main frame 12, and the bender heads 14-3 on both sides are movable on the main frame, and the bender head 14-2 in the center is fixed to the main frame. Figure 2 provided respectively,
As you can clearly see in Figure 3, each bender head 1
4 includes a center guide, for example, a center roller 22, which is arranged substantially horizontally and can move forward and backward in the axial direction, and a bending roller 24, which rotates (revolutions) around the center roller. The center roller 22 has a collar 2 loosely fitted around the tip of the piston 26 of the cylinder 25.
3, and a guide hole 2 is bored in the center of the piston tip surface. However, for long objects with small diameters, the collar 23 may be removed and the piston 2B may be used as a center guide, and the guide pin 30 loosely fitted into the guide hole 28 may be opposed to the guide hole. and is provided on the bracket 13. The center roller 22 moves in the axial direction as the piston 2B advances and retreats (advances and retreats), and in the forward position, the guide bin 30 loosely fits into the guide hole 28 of the center roller to support the center roller. Therefore, the center roller 22 has a double-sided beam shape, and a strong structure having a large resistance to lateral pushing forces is obtained.

As shown in FIG. 3, the bending roller 24 is rotatably mounted on a shaft 32, and a stopper 34 is fixed to the tip end surface of the shaft to prevent the bending roller from falling off. The shaft 32 is fixed to the crank arm 38 by a set screw 36. The crank arm 38 is loosely fitted around the collar 23 of the center roller at the tip of the piston 2B, and a gear 40 is fixed to the crank arm by a key 39. A gear 4B fixed to a motor shaft 44 of the motor 42 is meshed with the gear 40. In such a configuration, the driving force of the motor 42 is transmitted to the crank arm 38 via the motor shaft 44 and gears 48, 40 to swing the crank arm, and as the crank arm swings, the bending roller 24 is rotated around the center roller 22 in a vertical plane.

Note that a plurality of bending rollers 24 having different outer diameters are prepared. Then, in order to bend the reinforcing bar 4B while reliably holding it between the center roller 22, an optimal bending roller 24 is selected according to the diameter of the reinforcing bar 48, is attached to the roller shaft 32, and is bent. Bending is performed by an optimal combination of roller 24 and center roller 22.

A long object, for example, a reinforcing bar 48 is arranged between the center roller 22 and the bending roller 24, and the center roller 22 is moved forward to loosely fit the guide hole 28 and the guide pin 30, and then the bending roller 24 is rotated. The bending process is then performed. For example, when the bending roller 24 rotates approximately 135' clockwise around the center roller 22 as shown in FIGS. 4(A) and 4(B), the reinforcing steel 4 The end portion is bent to form a 135° hook 48a. Here, since the first bending roller 24 rotates upward in the vertical plane, the end of the reinforcing bar located on the horizontal plane is bent upward in the vertical plane and moves upward in the vertical plane. In addition, the first
As can be seen from the figure, in the embodiment, the bending rollers 24 of the pengu heads 14-1 and 14-2 on the left side and center rotate clockwise, and the bending rollers of the pengu head 14-3 on the right side rotate counterclockwise. is configured to do so.

In this way, the bent piece (hook) 48a of the reinforcing bar.

In a configuration in which the operator moves upwardly on a vertical plane rather than on a horizontal plane, the risk of injury to the operator due to contact with the folded piece is reduced. Furthermore, since the locus of movement of the bending piece 48a is on the vertical plane, there is less dead space on the horizontal plane, the continuous bending device 10 can be downsized, and the installation area can be reduced.

During bending, the bending roller 24 rotates while pressing the reinforcing bar 48 against the center roller 22, so that a large pressing force acts on the center roller from the side.

However, in the embodiment, in the forward position, the center roller 22 is held by the guide pin 30 and has a double-sided beam shape, so it can withstand a large pushing force from the sides.
Deformation and damage to the center roller are sufficiently prevented.

As shown in FIGS. 1, 5, and 6, the drive shaft 1B is provided in the main frame 12 below the central fixed pengu head 14-2 and extends to the right. This drive shaft 16 is, for example,
It has a threaded portion 17 on its outer peripheral surface, and is installed between a pair of brackets 12a of the main frame so as to be rotatable but immovable in the axial direction. Drive shaft 1
A motor shaft 52 of a motor 50 is connected to the left end of the motor 50 via a coupling 51, and the drive shaft is driven and rotated once as the motor is started. motor 5
0, use a servo motor, pulse motor, etc.
The motor can be used in combination with an inverter.

In addition, the rotation speed of the drive shaft is detected and the motor 50 is
A position detecting means 4I3 is provided to adjust the position of the sliding clamp 1B in cooperation with the position detecting means 4I3. In the embodiment, the 1-position detection means 48 includes an encoder 53,
The encoder is connected to the right end of the drive shaft 1B via a coupling 54. encoder 5
The rotation speed of the drive shaft 16 detected in step 3 is the same as that of the motor 5.
0, thereby controlling the rotation of the motor and regulating the movement of the sliding clamp 18 on the drive shaft.

The sliding clamp 1B has a built-in female threaded portion that engages with the threaded portion 17 of the drive shaft, and is mounted on the drive shaft. Therefore, when the motor 50 is started to drive and rotate the drive shaft 1B, the sliding clamp 18 is moved to the right or left on the drive shaft as the drive shaft rotates. Here, the moving distance of the sliding clamp 18 depends on the rotation speed of the drive shaft 1B, and the moving direction depends on the rotation direction of the drive shaft. Please note that the guide/
<-55 is installed parallel to the drive shirt 1B between the pair of brackets 12a. And bearing 5B
Using this, the sliding clamp 18 guides l<
-55 is supported. In this way, Gaitono (-5
5. By being supported by both sides of the drive shaft te, the sliding clamp 18 is guided by the guide bar without rotating and is attached to the drive shaft 1B.
be moved above. The range of movement of the sliding clamp 18 is regulated by a limit switch 59 on the main frame 12 (see FIG. 6).

The drive shaft 16 only needs to be configured to move the sliding clamp 18 in conjunction with the rotation of the drive shaft. For example, with two steel balls (pol) interposed,
Attach the pole screw to the drive shaft 16. It may also be configured such that it is formed between the sliding clamps 18.

The sliding clamp 18 has a support plate 57, and a clamp mechanism 58 is provided on the support plate 7, as shown in FIG. Then, the reinforcing bar 48 is clamped by the clamp mechanism 58 of the sliding clamp 18-1-, moves together with the sliding clamp, and is conveyed a predetermined distance.

As shown in FIGS. 8 and 9, the clamp mechanism 58 is configured by combining a shielding block 60 that is movable in the axial direction and a suppressing block B2 that can be raised and lowered and that holds the reinforcing bar 48 between the shielding blocks. There is. That is, a cylinder 70 for axial movement and a cylinder 72 for lifting and lowering are respectively fixed to the frame 64, and shielding blocks 60. The suppression blocks 62 are each fixed. A pair of square holes θB into which M of the shielding block GO is fitted are provided facing each other in the frame 64, and a pair of guide bins B8 extend into the square holes from both left and right sides, respectively. A long groove-shaped guide hole 69 into which the guide bin G8 is loosely fitted is formed from the tip to the center of both left and right sides of the shielding block 60, and the shielding block is guided by the guide bin and smoothly moves back and forth in the axial direction. will be moved.

In this manner, the clamping mechanism 58 that combines the shielding block 80 that is movable in the axial direction and the suppressing block 62 that is movable up and down allows the reinforcing bar 48 to be reliably clamped between them despite its simple configuration. Further, since the configuration is simple, the clamp mechanism 5B can be easily made into a unit.

As shown by the dashed line, a spacer 87 is bolted to the lower surface of the shielding block 60 for the large-diameter reinforcing bar 48 . Therefore, the shielding block 60 along with the spacer
The square hole 8B is formed to have a sufficient size in the vertical direction so that the square hole 8B can be inserted therethrough. Further, the suppression block 62 is configured to provide a piston 73 of the lifting cylinder 72 with, for example, 'RM
The spacer 76 is fixed by the spacer 76, and the cushion rubber 78 fitted into the hole 77 is formed on the north side of the spacer.

A pair of guide plates 79 for guiding the vertical movement of the suppression block B2 are provided on the frame B4 on both sides of the spacer.

In this manner, in the configuration in which the cushion rubber 78 is provided, the reinforcing bars 48 can be reliably held between the shield blocks GO1 suppressing blocks 62 by utilizing the elasticity of the cushion rubber. In addition, variations in the diameters of the many reinforcing bars 48 are compensated for by the elasticity of the cushion rubber, and a large number of reinforcing bars 48 can be reliably held at the same time. Note that a large number of suppression blocks 6 with different thicknesses
2 and attaching the optimal suppression block 62 to the piston 73 of the lifting cylinder according to the (¥) of the reinforcing bar 48, the extension distance of the piston 73 can be reduced, and the reinforcing bar can be clamped quickly and reliably. .

The unitized clamp mechanism 58 is not only attached to the sliding clamp 18, but also attached to the pengu head 14 (+4-1 to +4-3) as shown in FIG.
A main plane ILt- is also disposed adjacent to each of the main planes 1a and 1a. Here, although the clamp mechanism 58 is the same in its basic mechanism of clamping the reinforcing bar 48, the clamping mechanism 58 is slightly different depending on the position 8 provided. In other words, the clamp mechanism 58 provided in the sliding clamp 18 utilizes the elasticity of the cushion rubber 78 to reliably clamp a large number of reinforcing bars and simultaneously feed them the same distance.

On the other hand, the clamping mechanism 58 provided in the pengu head 14 only needs to clamp a large number of reinforcing bars 48 at the same time so as to prevent the reinforcing bars 48 from escaping during one bending process.

Therefore, in place of the spacer 76, rubber 78, an L-shaped block is screwed onto the piston 73, and the L-shaped block is screwed onto the piston 73.
Rebar is pressed against the tip of the mold block. in this way,
The clamping mechanism 58 of the pengu head 14 also functions as a stopper. Therefore, the clamp mechanism 58 of the pengu head 14 is provided on the side opposite to the bending side of the reinforcing bar. In the embodiment, the bending rollers 24 of the left side and center bender heads 14-1 and 14-2 are configured to be able to rotate clockwise, and the right side bender 14-3 is configured to be able to rotate counterclockwise. 1, as can be seen from the position of the lifting cylinder 72, the clamp mechanism 58 is provided on the right side with respect to the bender head 14-1, 14-2, and on the left side with respect to the bender head 14-3. It is being

As described above, the central bender head 14-2 is fixed and the drive shaft 16 is adjacent to the central bender head 14-2.
is provided on the main frame 12. Therefore, the reinforcing bar 48 that is held and conveyed by the clamp mechanism 58 of the sliding clamp on the drive shaft 1B is positioned based on the position of the bender head 14-2. Therefore, the position of the reinforcing bar 48 can be set relative to the bender head 14-2, and the feeding of the reinforcing bar can be quickly and easily adjusted.

Among the bender heads 14-1 to 14-3, the bender head 14-2 in the center is fixed to the main frame 12, while the bender heads 14-1 on both sides,
+4-3 is provided so as to be movable to symmetrical positions across the central bender head. For example, the bender head +4-1.14-3 is made movable by a configuration similar to the conveying means for the sliding clamp 18 described above. That is, the motor 50 shown in FIGS. 5 and 6,
For example, a combination of the drive shaft 1B and the encoder 53 is arranged symmetrically on both sides of the central bender head 14-2. In place of the sliding clamp 18, a movable bender head 14-1 or 14-3 may be attached to the drive shaft 16, respectively. In this configuration, the twisting direction of the drive shirt 1B is reversed, and by driving the motor 50 in the opposite direction, the bender heads +4-1, 14-3 are rotated synchronously and reciprocally along the feeding direction of the reinforcing bar 48. is moved symmetrically in the direction. In this way, the bender head 14-1.
By moving 14-3 synchronously and symmetrically in opposite directions, the bender heads +4-1.14-3 are always moved to symmetrical positions.

Also, cut female threads in opposite directions on one drive shaft 1B, and use this drive shaft.

1 motor 50. In combination with the encoder 53, the bender heads 14-1, 14-3 may be moved to symmetrical positions. In this configuration, the drive shaft 16, motor 50. Only one encoder 53 is required, which simplifies the configuration and reduces the number of bender heads 14-1.1.
4-3 ensures that the pole screw is moved symmetrically, as described for the sliding clamp 18, and the drive shaft 1B, bender head 14-1.14-
' It is also possible to have a configuration provided between three.

When the motor 50 is started and the drive shaft is rotated, the transfer roller 84 rolls on a pair of rails 82 on the frame (see FIG. 3), is guided by the guide bar 55, and moves the bender head 14-1. .14-3 are moved the same distance in opposite directions on the main frame.

Further, as shown in FIG. 1, the continuous bending apparatus 10 for long objects includes a positioning stopper 86 and an auxiliary holder 88. In the embodiment, since the reinforcing bars 48 are conveyed from right to left, the positioning stopper 8
6. The auxiliary holder 88 is attached to the left bender F14-1
．． They are each attached to the main frame 12 on the left side of the right bender head 14-3. The positioning stopper 86 and the auxiliary holder 88 have a known configuration, and the tip of the reinforcing bar 48 conveyed from the right to the left is positioned by coming into contact with the positioning stopper. The installation position of the zero positioning stopper 88 and the auxiliary holder 88, which are slid on the ground and sent to the left, can be adjusted manually as appropriate. Contrary to the embodiment, when conveying the reinforcing bars 48 from the left to the right, the positioning stopper 88 and the auxiliary holder 88 are moved from the left bender head 14-1. They are respectively arranged on the right side of the right bender head 14-3.

The hoop line having the shape shown in FIG. 12(C) is formed by the continuous bending apparatus 10 having the above configuration as follows.

There are various possible procedures for processing hoop lines.

Similar to the processing procedure in the known configuration described above, the following assumptions are made.

(1) First, hook bending of both ends of the reinforcing bar is performed simultaneously by the bender heads 14-1 and 14-3.

(2) Next, by the bender head 14-2.14-3.

Perform right angle bends on both sides of the reinforcing bar at the same time.

(3) Finally, the center of the reinforcing bar is bent at a right angle using the bender head 14-2.

First, considering the length (L) of the steel vJ48 to be bent, the position of the positioning block 86 is set so that the bender head 14-2 is located at the center of the reinforcing bar.
Five reinforcing bars 48 of the same diameter are placed on one auxiliary holder 88, pushed to the left, and the tips of the reinforcing bars are placed on the positioning block 8.
It comes into contact with B.

Then, the motor 50 for the bender head 14-1. The left and right bender heads 14-1, 14-3 are simultaneously moved so that they are located at the 10th
(See Figure (A)), the moving distance of the sliding clamp 18 is determined by the encoder 53 detecting the rotation speed of the drive shaft 16, and when the sliding clamp moves by a predetermined pressure # (in the embodiment, 龜゛), the motor 50 starts moving. will be stopped. - Once the bender head 14-1.14-3 has been moved to a predetermined position, it is fixed at that position during the bending process and there is no need to move it again. The value is the sum of 1/4 (X' and Y', which will be described later, are also the sum of X and Y plus 174, which is the circumference of the center roller 22).

Then, the cylinders 70 for moving back and forth of the clamp mechanisms 58 attached to the sliding clamp 18 and the bender heads 14-1 to 14-3 are respectively driven, and the piston 7
1, and loosely fit the shielding block 60 at the tip of the piston into the square hole 8B of the frame (see Figures 8 and 9 r!
Then, the upper part of the reinforcing bar 48 is covered by the shielding block 60. After that, drive the lifting cylinder 72,
The piston 73 and the pressing block 62 are raised L to sandwich the reinforcing bar 48 between the shielding block 60 and the suppressing block. The clamping mechanism 58 of the sliding clamp 18 continues to clamp the rebar 48 during the bending cycle. On the contrary,
As will be described later, before the reinforcing bars 48 are conveyed, each clamp mechanism 58 of the bender heads 14-1 to 14-3
releases the reinforcing bar.

Then, among the bender heads 14-1 to 14-3,
Drive each cylinder 25 of the Rad 14-1 and 14-3 to advance the piston 28 to the bender that performs the bending process,
The guide hole 28 at the tip of the piston is fitted into the guide bin 30 of the main frame, and also in the bender head.
If the workpiece that covers the upper part of the reinforcing bar 48 (see Fig. 3) is the reinforcing bar 48 with a small diameter of about 10-1,
The collar 23 is not attached to the piston 2B, and the bending process is performed using the piston as a center roller.

Thereafter, when the motor 42 is started, the driving force of the motor is transmitted to the crank arm 38 via the motor shaft 44 and gears 413, 40, and the crank arm swings around the piston 26. As the crank arm 38 swings, the bending roller 24 is rotated about 135° around the center roller while sandwiching the reinforcing bar 4B between the bending roller 24 and the center roller 22. Then, both ends of the reinforcing bar 48 are bent upward in a vertical plane, and hooks 48a are formed at both ends of the reinforcing bar (see FIG. 10(B)). The bending roller is clockwise, and the bending roller of the bender head 14-3 is counterclockwise.

Regarding the bender head 14-1.14-3, the cylinder 42 of the bending roller 24 is driven, and the bender head 14-
1. Return the bending roller 24 of 14-3 to the initial position.

Further, regarding the bender head 14-1, the cylinder 25 of the center roller is driven, and the center roller is moved back by vk together with the piston 26 to return to the initial position.

For ease of understanding on the drawing, the bender head 14 shows the center roller 22 retracted to its initial position with an x.
By retreating the center roller 22 of -1, there is no obstruction in the conveyance path -L of the hook 48a at the end of the reinforcing bar, and it becomes possible to convey (feed) the reinforcing bar to the right. Further, the cylinders 70 and 72 of each clamp mechanism 58 of the bender heads 14-1 to 14-3 are driven to retreat the shielding block and lower the suppression block to release the clamping of the iron TFJ48. The reinforcing bars 48 are made free for each clamp mechanism 58 from -1 to 14-3.

However, the clamp mechanism 5 of the sliding clamp 18
8 continues to clamp the reinforcing bar 48, then starts the sliding clamp motor 50, and drives the drive shaft 1.
By rotating B, the sliding clamp 18 is moved to the right by a distance corresponding to one side of the hoop muscle. In the example, the short side of the hoop muscle is 48! The sliding clamp 18 is moved to the right by a distance X' corresponding to (length: x), but the long side is 48! Drive shaft 1 may be moved to the right by a distance Y corresponding to (length: Y)
By detecting the rotational speed of B, the moving distance of the sliding clamp 18 is ascertained, and when the sliding clamp moves a predetermined distance (x' in the embodiment), the motor 50 is stopped. The sliding clamp is at a distance of X°
If it moves, the reinforcing bar 48 held by the clamp mechanism 58 on the sliding clamp will be sent a distance of X degrees to the right (see FIGS. 10(B) and (C)). Therefore, as shown in FIG. As shown in (C), the right end hook of the reinforcing bar 48 is separated from the pengu head 14-3 to the right by a distance ax'. Also, Penguhe/F 14-2
Reinforcement bar 4 located to the left by force P + distance (X' + Y')
8 is moved to a position a distance Y° from the pengu head 14-2.

After feeding the reinforcing bar 48 by a distance X'' corresponding to the short side X of the hoop bar, the cylinder 70.72 of the clamping mechanism 58 of the pengu head 14-2. Clamp again.

Then, the cylinder 25 of the pengu head 14-2, 14-3 is driven to move the center roller 22 forward.

Then, when the motor 42 is started and the crank arm 38 is swung to rotate the first bending roller 24 by about 80 degrees, the reinforcing bar 4
8 is subjected to two right angle bends at the same time (Fig. 10 ([1
), then the short side 48 of the hoop bar is formed on the right end of the reinforcing bar 48, and the long side 48 of the hoop bar is formed on the left end of the reinforcing bar.

After right angle bending, the pengu head 14-2 is
．． The cylinders 70 and 72 of the clamp mechanism 58 of 14-3 are driven to release the clamping of the reinforcing bar 48. Further, the bending roller 24 and center roller 22 of the pengu head 14-2, 14-3 are returned to their initial positions, and the center roller 22 of the pengu head 14-3 is retreated.

Then, start the motor 50 and drive the drive shaft te.
Rotate and move the sliding clamp 18 a distance of X°
The sliding clamp is returned to the initial position shown in FIGS. 10(A) and 10(B) by moving it to the left by
0(E)), then, as shown in FIG. 10(E), the long side 48 of the hoop muscle located on the left is sent to the left of the pengu head 14-2 by a distance It will be done.

Here, the center roller 22 of the pengu head 14-3
has been retreated in advance and removed from the conveying path of the reinforcing bar 48, so the reinforcing bar is sent to the left without being obstructed by the center roller 22 of the pengu head 14-3.

After the reinforcing bar 48 is clamped by the clamping mechanism 58 of the pengu head 14-2, the pengu head 14-2
The center of the reinforcing bar is bent at a right angle by the center roller 22 and bending roller 24. Then, Pengu Head 14-
Short side 48 of the hoop muscle to the left of 2! However, the long side of the hoop muscle is 48 on the right! are formed at the same time, and a hoop streak of a desired shape is formed (see Fig. 1θ (F)).

As described above, according to the present invention, it takes one day for the sliding clamp to load and transport long objects such as reinforcing bars 48.
A hoop line that requires five bending processes can be formed by reciprocating a predetermined distance, for example, a distance corresponding to the short side of the hoop line. In other words, Pengu Head 14-1
, 14-3 is positioned according to the length of the hook, a series of bending processes of hoop muscles of the same shape can be performed continuously by reciprocating the sliding clamp 18 once at a time. . Therefore, the 500 to 3,000 hoops required for construction work on medium-sized buildings are
100 to 80 when bending each book at the same time
Even zero bending processes can be performed quickly and easily, and one bending process can be performed with high workability.

The sliding clamp 18 is connected to the drive shaft 16
The rotation of the drive shirt is detected by, for example, an encoder 53 to adjust the position of the sliding clamp. Therefore,
By adjusting the position of the sliding clamp 18, feeding of a long object can be performed mechanically and automatically. In particular, since the position of the long object is set based on the fixed position of the bender head 14-2, the bender head 14-2
The position of the long object is set relative to the object. Therefore, compared to the known configuration in which the sliding clamp 18 is manually moved to send a long object, in this invention,
Reinforcing bars can be fed accurately and quickly, and a series of continuous bending operations can be performed quickly and easily with high precision.

In addition, in the configuration in which the sliding clamp 18 is moved in this way, since the sliding clamp is lightweight,
The sliding clamp can be transported by a small and inexpensive motor.

In the configuration of the present invention that automates the feeding of long objects, if the movements of the center roller 22, bending roller 24, shielding block 60 of the clamp mechanism, and suppression block 62 as well as the movement of the drive shaft motor 50 are programmed and controlled, A high degree of automation becomes possible. Therefore, 100~
The bending process can be repeated B00 times easily.

Bender head 14-1 prior to processing. The movement of item 3 only needs to be performed once for a series of bending operations, and is easy to perform, so there is little need to automate it. -1.14-3 is moved to the vendor by a program that automatically moves it to the desired position.
The movement of 4-3 may be controlled.

Such a configuration further facilitates automation.

Of course, the continuous bending device 10 for long objects of the present invention that automatically feeds long objects can not only be used to form hoop lines, but also to
Other bending processes such as anchor bars and stirrup bars can also be performed quickly and easily. In other words, as understood from the 10th UA (B), if the bending process ends when both ends are bent,
Anchor bars are formed. Moreover, as can be understood from FIG. 10(D), if the bending process is completed when two right angle bends are performed in addition to the bends at both ends, stirrup lines are formed.

In addition, the bender heads 14-1 and 14-3 can be moved independently, and the bender heads 14-1 and 14-3 are moved to a different position from the central bender to the 12th door 14-2, not in the 4th position.
1.14-3 may be moved. With such a configuration, stirrup bars having bent pieces of different lengths can be formed.

As mentioned above, if a known continuous bending device for long objects is a three-head device, it is necessary to move the bender heads on both sides during one bending process, and the bending process can be performed without moving the bender head. Needs to be five heads. However, if a five-head is used, the structure becomes complicated, and a continuous bending machine for long objects cannot be produced at low cost.

In contrast, according to the present invention, there is no need to move the bender head during bending despite the three-head type, and the continuous bending apparatus for long objects eliminates the drawbacks of both the three-head type and the five-head type. is obtained.

The above-mentioned embodiments are for illustrating the present invention, and are not intended to limit the present invention in the same way, and all modifications and modifications within the technical scope of the present invention are also included in the present invention. Needless to say.

For example, in the embodiment, the position detecting means 20 detects the rotation speed of the drive shaft 18 using the encoder 53, but it is also possible to use a rotation speed sensor other than the encoder. The position detecting means 20 may be configured to directly detect the position of the sliding clamp 18 or the movable pengu head row 1, +4-3 using a sensor.

In addition, the rotating direction of the bending roller 24 of the bender head 14 (14-1 to 14-3) is not fixed to either clockwise or counterclockwise, but can be rotated in either direction. It may also be configured to control the direction as appropriate; in this case,
Depending on the direction of rotation of the bending roller 24, the bender head 1
It is preferable that the clamp mechanism 58 of 4" can be switched from side to side by sliding it to the left or right. In particular, the clamp mechanism 58 of
2 can be rotated in any direction, various continuous bending processes can be performed quickly and easily using only this pengu head. It can also be applied to processing equipment. For example, when two different types of continuous bending, for example A and B, are to be performed in a complicated manner alternately, the first. It is preferable to arrange five pengu heads in parallel so that the fifth pengu head moves symmetrically in a pair, and the second and fourth pengu heads move symmetrically in a pair. In this configuration, 'm
The continuous bending process A can be performed alternately and rapidly by combining the first and fifth pengu heads with the central pengu head, and the continuous bending process B can be performed by combining the second and fourth pengu heads with the central pengu head.

〔Effect of the invention〕

As described above, according to the continuous bending apparatus for long objects according to the present invention, among the three pengu heads, the pengu heads on both sides are arranged so as to be movable to symmetrical positions with the central pengu head in between, and the sliding clamp but,
It is provided so that it can slide while holding a long object.

With this configuration, once the rads are set on the benders on both sides at positions according to the length of the hooks, the sliding clamp only needs to be moved back and forth once for each bending process. It can also be done continuously. Therefore, one bending process can be repeated several hundred times quickly and easily, ensuring high workability.

Furthermore, since it is sufficient to have three pengu heads instead of five, the continuous bending apparatus for long objects is structurally simplified and can be manufactured at low cost.

Further, since the sliding clamp, which is reciprocated once for each bending process, is lighter than the pengu head, a small and inexpensive motor can be used as the motor for conveying the sliding clamp.

Furthermore, with the continuous bending device for long objects of the present invention, automation of one bending process can be easily achieved.If the pengu heads on both sides can be moved synchronously and symmetrically, the pengu head can be quickly positioned. Ru. For example, a single drive shaft threaded in opposite directions can be fitted with benders on both sides to ensure symmetrical movement of the pengu heads on both sides.

Furthermore, according to the method for continuous bending of a long object of the present invention, there is no need to move the pengu head in the center or the pengu heads on both sides during bending, just by feeding the long object. Can bend long objects. For example, bending processes that require a large number of processes, such as loop lines, are
This can be done by simply reciprocating the workpiece once in a while, and the -a bending process can also be done continuously. Therefore, bending can be repeated hundreds of times quickly and easily, and continuous bending of long objects is possible.
Can be performed with high workability.

For example, when bending a hoop bar, set the reinforcing bar so that the central pengu head is located in the center of the reinforcing bar, and move the pengu head on both sides away from the end of the reinforcing bar by a length corresponding to the length of the hook. There is no need to move the pengu head, and the hook bar can be formed by simply moving the reinforcing bar once for a length corresponding to one side of the hook bar.

In addition, the central Pengu head is generally as shown in the illustration.
Although it is fixed to the main frame, it may be movable along with the sliding clamp and the drive shafts of the pengu heads on both sides.

[Brief explanation of the drawing]

1rf4 is a schematic plan view of a continuous bending apparatus for long objects according to the present invention. 2 and 3 are cross-sectional views of the continuous bending apparatus for long objects along lines 1--1 and m-mK in FIG. 1. Figures 4 (A) and (B) are a schematic front view and a schematic left side view of the pengu head showing the movement of the bending roller in one bending process, and Figures 5 and 6 are views of a long object around the slider. A partial plan view and a partial fair view of the continuous bending device. FIG. 7 is a schematic sectional view of the continuous bending device for long objects along the line ■-■ in FIG. 1. FIG. 8 is a clamping mechanism. FIG. 9 is a cross-sectional view of the clamping mechanism taken along line IX-IX in FIG. A schematic operational diagram of the continuous bending processing device for objects, Fig. 11 (
A), CB), ((:) is a plan view illustrating anchor bars, stirrup bars, and hoop bars formed by continuous bending. , is a schematic operational diagram of a known five-head type continuous bending device for long objects. 10: continuous bending device for long objects, 12: main frame, +4 (+4-1 to 14-3): Bengu head ,
IB: Drive shaft, 18; Sliding clamp, 20: Position detection means, 22: Pengu head center roller (center guide), 23: Center roller collar, 24: Bengu head bending roller, 25
．． 70,72 cylinder, 2B, 71,738 piston, 38: crank arm, 40,48: gear, 42,5
0: Motor, 48: Rebar (long object), 49a, 48
X, 48Y: Rebar hook. Short side, long side, 53: Encoder, 58: Clamp mechanism, 60: Clamp mechanism shielding block, 62: Clamp mechanism suppression block, 86 Two positioning stoppers, 88:
Auxiliary holder applicant Ishihara Kikai T-gyo Co., Ltd.

Claims (1)

[Scope of Claims] (1) A center guide arranged approximately horizontally and movable in the axial direction, and a bending roller that rotates upward around the center guide, arranged in the longitudinal direction of the main frame. In a continuous bending machine for long objects equipped with three bender heads, the bender heads on both sides are movable to symmetrical positions with the central bender head in between. The sliding clamp that holds and transports long objects is
2. The continuous bending device for a long object, characterized in that it is slidably provided on the main frame. (2) The long object according to claim 1, wherein the bender heads on both sides are configured to be movable synchronously and symmetrically. Continuous bending equipment for objects. (3) Attach bender heads on both sides to both sides of the drive shaft that are threaded in opposite directions.
3. The continuous bending apparatus for long objects according to claim 2, wherein the bender heads on both sides are movable synchronously and symmetrically. (4) A plurality of bender heads equipped with a center guide arranged almost horizontally and capable of moving back and forth in the axial direction, and a bending roller that rotates upward around the center guide are installed in parallel in the feeding direction of the long object. Then, the center guide that prevents the feeding of long objects is moved back appropriately, and while adding the necessary feed to the long objects,
In a continuous bending method for long objects in which a long object is continuously bent using a bending roller, there are three bender heads, and the central bender head is
The reinforcing bar is positioned in the center of the reinforcing bar, one bender head is placed symmetrically on each side of the central bender head, and fixed during the bending process. A continuous bending method for long objects by adding (5) Three bender heads equipped with a center guide arranged almost horizontally and movable in the axial direction and a bending roller that rotates upward around the center guide are arranged in parallel in the reinforcing bar feeding direction, In the hoop reinforcement processing method, the center guide that prevents the reinforcing bar from being fed is moved back as appropriate, and while applying the necessary feed to the reinforcing bar, the reinforcing bar is continuously bent by bending rollers to form the hoop reinforcement. Position the reinforcing bar so that the bender head is located in the center of the reinforcing bar, place the bender heads on both sides inward from the end of the reinforcing bar by a length corresponding to the length of the hook, and bend. During processing, the reinforcing bar is fixed, and the bending rollers of the bender heads on both sides are rotated in opposite directions to perform hook bending, and the reinforcing bar is fed by a length corresponding to one side of the hoop bar, and then The bending rollers of the central bender head are rotated in opposite directions to perform a right-angle bend, the reinforcing bar is returned by the distance it was sent, and the bending rollers of the central bender head are rotated to perform a right-angle bend. How to process hoop muscles to form the muscles.