JPH0399726A - Continuous bending method for long sized material with two times of bending executed and its bender - Google Patents

Abstract

PURPOSE:To continuously bend the long sized material with 2 times of bending executed and to improve the productivity of the bending work of the bender by setting position of the 1st and 2nd stoppers. CONSTITUTION:The 1st and the 2nd stoppers 18, 20 are arranged with the center guide 14 of the bender 10 inter posed therebetween, the positioning is executed by bringing the one end of the long sized material in contact with the 2nd stopper 20 and the 1st bending work is executed with rotating around the bending roller 16. Next, the other end of the long sized material is brought in contact with the 1st stopper 18 by extending the piston 48 of the cylinder 46 of the 2nd stopper 20 and the 2nd bending work is executed by re-rotating the bending roller 16. In such a way, of once the positions of the 1st and the 2nd stoppers 18, 20 are set in accordance with the shape to be bent for the long sized material, the 2 times of bending work is continuously executed and the productivity is improved.

Description

[Detailed description of the invention] [Industrial application field] This invention provides right angle bending and flapping at both ends of a long object.

The present invention relates to a continuous bending method and bender for a long object, which performs two bending processes such as anchor bending and anchor bending.

[Conventional technology]

Generally, in a bending load device (hengu) for a long object,
A long object such as a reinforcing bar or a steel pipe is disposed between a center guide such as a center roller and a bending roller that is rotatable around the center guide. The bending roller rotates (revolutions) around the center guide, thereby bending the long object to a desired angle. During the bending process, the long object that is pinched and bent between the center guide I and the bending rollers tries to escape to the side, so the long object should be brought into contact with the stopper to allow the long object to escape. is prevented.

Bending processes include right angle bending (90° bending), hook bending (135° bending), anchor bending (180° bending), etc. For long objects, such as reinforcing bars, these bending processes are performed continuously. Bending is a widely used process. As a continuous bending process, bending process a2, in which both ends are bent, is frequently performed, and the bending process with a number of bending processes of 2Ω depends on the type of bending process, such as U-shape (for right-angled bending), hook-shape ( (for hook bending) and anchor muscle (for anchor bending). Note that U-shaped reinforcements are often used to regulate the width of column reinforcements and beam reinforcements, and are also called width stop reinforcements.

Of course, different bending processes are often applied to both ends.

When two hook bends and two right angle bends are combined, a stirrup strip (number of bends=4) is formed. Further, when three right angle bends are added to two hook bends (one hook bend and one right angle bend, or two right angle bends), a hoop muscle (number of bending processes = 5) is formed. Anchor bars, stirrup bars, and hoop bars are widely used as column bars and beam bars.

Center guide (guide roller) on box-shaped housing
The bending process is often performed using a so-called box-shaped bender equipped with a set of curved 1f rollers (bending rollers).

For example, a continuous bending process using a box-shaped bender with the number of bending pressures of 2 is normally performed as follows.

A long object, for example, a reinforcing bar, is cut to a predetermined length, and from this reinforcing bar, a width stop bar (U-shaped bar) 124 having a center length of O1 and a length of both ends L1 as shown in FIG. 4(E) is bent. Assuming that, first, from the center of the center guide 114,
A stopper (positioning stopper) 118 is set at a distance approximately equal to O+L1, and the reinforcing bar is fed from the right to the left until it comes into contact with this stopper (see Fig. 4 (A)).
.

Then, as shown in FIG. 4(B), the bending roller 116
rotates counterclockwise around the center guide 114 by approximately 90 degrees.
The right end is rotated by 1° to make a right angle bend. Rebar 124
is pressed by a lateral stopper (stopper for preventing escape) 126, thereby preventing escape to the side during bending -1-.

After returning the bending roller 116 to the initial position and removing the obstacle (bending roller) from the path of the reinforcing bar 124, the position shown in FIG.
), the stopper 118 is moved to the right by approximately the center length LO, and the reinforcing bar 124 is conveyed to the right.

Then, the bending roller 116 rotates counterclockwise around the center guide 114 again by approximately 80 degrees, thereby performing a right angle bending of 2 degrees 1] to obtain the desired U-shaped streak ( (See Figure 4(D)).

[Problems to be Solved by the Invention] As described above, the box-shaped bender can easily perform two bending operations. However, in order to repeatedly perform bending, it is necessary for the stopper 118 to reciprocate between the initial position and the forward position, which is the center length LOf4 from the initial position. For example, width stop bars, etc., are required in the order of several hundred pieces even in the construction work of medium-sized buildings.
Even if 2-3 trees are processed at the same time, 100-200
This bending process is repeated several times. Therefore, the stopper 118 must be moved back and forth the same number of times as the number of bending operations, which is unbearable. Moreover, high workability cannot be ensured.

Normally, the stopper 118 is moved along a scale and the position of the stopper is determined visually, so that machining errors are likely to occur. Therefore, the stopper cannot be positioned accurately, and it is difficult to bend the chamber by a certain amount.

Recently, a continuous bending device for long objects has been known in which a so-called pengu head, which is a combination of a center guide and a bending roller, is arranged in parallel on the front of a housing. Hoop f)5 is the most commonly used continuous bending process.
5 (Number of processing: 5), in general, continuous bending loading "equipment" has five pentaheads arranged in parallel, so-called "
It is configured as a five-handed type. In this type of continuous bending machine, the center guide is configured to move forward and backward in the axial direction, and in order not to interfere with the feeding of long objects, the center guide that is not applying bending pressure is moved backward, and the center guide is moved back and forth during the bending process. It is excluded from the trajectory of a long object (the bending trajectory of a long object).

A box-shaped bender head bends long objects on a horizontal plane, whereas a continuous bending machine with pengu heads installed side by side bends long objects on a vertical plane. Also called a vendor.

According to this vertical bender, the bending process with the center length LO1 and both end lengths L1 and the number of bending processes of 2 is performed by two pengo heads including the central bender head in the following manner.

As shown in FIG. 5(A), the center guides 114L and 114R are set apart by a length corresponding to the center rear LO, and the stopper 118 is set apart by a length corresponding to the length L1 at both ends. is set away from the left center guide 114L. The reinforcing bar, which has been cut in advance to a predetermined length, is fed from the right side to the left side until it comes into contact with the collar 118.

Then, by rotating the right bending roller 116R counterclockwise and the left bending roller 118L clockwise at the same time, a U-shaped portion 124 having a center length LO1 and both end lengths L1 is formed by one bending process. (See Figure 5(B)).

In this way, according to the vertical bender, by rotating the left and right bending rollers simultaneously, two bending processes can be performed in one bending process, so the bending process can be performed quickly and the work efficiency is high. can be secured. In addition, once the distance between the left and right center guides and the position of the stopper are set, the same bending process can be performed continuously, eliminating the troublesome work of moving the left and right center guides, S) and PA, for each bending process. It will be released. And, since the same bending process can be performed while the center guide and stopper positions are fixed,
Bending of a certain amount of chambers can be easily performed without any processing errors.

However, the vertical bender has the disadvantage that the center back (corresponding to the width) that can be processed is limited.

In other words, the bending radius (corner) of the bending process is twice the diameter d of the long object, so the diameter of the center guide is 4
d. As can be clearly seen from Fig. 6, since center guides of such size are arranged adjacent to each other, the center rear LO is LO=d+4d+α+4d+d=1
0d+α≧10d. In this way, bending at a width 10 times the diameter of the long object is minimized.

However, in recent years, improvements in wall structures have led to thinner walls, and with the known vertical bender, the width that can be processed is limited to 10 times that of a long piece, the narrow width required for the wall structure Bending products (narrow bending products) cannot be obtained.

On the other hand, a box-type bender is capable of bending a long object to a width about eight times as narrow, and therefore narrow-width bending is performed using a box-type bender.

This invention has the following advantages: - The same bending process can be performed continuously while fixing the previously set position of the stopper, and narrow bending processes corresponding to thinning of the wall can also be performed. The purpose of this paper is to provide a method for continuous bending of large objects and a bender for the same.

[Means to solve the problem]

In order to achieve the objective -1, according to the continuous bending method of IJI, the first and second stoppers are arranged at predetermined positions with a center guide in between, and the second stopper with a cylinder
A first bending process is performed by bringing the long object into contact with the stopper. Then, the piston of the cylinder of the second stopper is extended, the elongated object is brought into contact with the first stopper, and a second bending process is performed.

[Effect]

In such continuous bending II method, once the first and second stoppers are set at predetermined positions, the necessary positioning of the long object can be performed simply by expanding and contracting the piston of the cylinder of the second stopper. , bending can be performed continuously.

〔Example〕

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

1 As shown in FIG. 1, a bender 10 according to the present invention is equipped with a box-shaped housing 12, and a center guide 14, a bending roller 16, and a pair of positioning stops 18, 20 are provided on the housing surface. It is arranged. The center kite 14 and the bending roller 16 have a known configuration, and an arcuate groove 22 is formed on the upper surface of the housing around the center guide. Then, the driving force is transmitted to the bending roller via the motor, gear train, etc. built in the housing 12, and the bending roller 16 is rotated along the arcuate groove 22, thereby creating a gap between the center guide 14 and the bending roller. A long object, for example a reinforcing bar 24, is bent at a predetermined angle. Rebar 24
By being pressed by the collar 26, side escape during one bending process is prevented. Here, the reinforcing bar 24 is cut into a predetermined length corresponding to the center length and the length L1 at both ends of O1.
- Supplied by trees or by several trees.

An L-shaped angle steel 28 is bolted to the front of the housing on the left side of the center guide 14, and an L-shaped angle steel 29 is attached to the port 11-on the housing opening on the right side of the center guide 14. 2. The first stopper 18 is attached to the angle steel 28, the second stopper 20 is attached to the angle steel 29, and the scales 30 and 31 indicating the positions of the points and the collar are attached to the angle steel. is fixed on the right side of the

To explain the first stop collar 18, as can be clearly seen by looking at FIG. 2 in addition to the IT diagram, the first stopper includes a slider 34 and stopper plates 1 and 36 rotatably attached to the slider. It is composed of The slider 34 includes a U-shaped member 34a that slides using the angle steel 28 as a guide, a play 1/34b that is welded to the U-shaped member and extends behind the U-shaped member, and a U-shaped member 34c that is welded to the right side of the plate. Clamp lever screwed onto the front of the U-shaped member
34d, rotate the clamp lever, screw it forward,
By securing the U-shaped member to the angle steel, the slider is fixed in place. The shaft 3 is attached to the U-shaped member 34c.
The shaft 4e is supported by the shaft 1ilh, and by welding the stopper plate 36 to this shaft, the stopper plate is rotatable relative to the slider.

The stopper plate 36 is formed into a substantially L shape, and a port 37a is screwed onto the rear end of the stopper plate. In addition, another port 37b is screwed onto the plate 1-34b, and a hole 38a is formed at the tip of the port h37a, 37b.
, 38b, each end is connected to 11=, and pol l-37a, 3
A tension spring 40 is tensioned between 7b.

According to such a configuration, the stopper plate 36 is biased clockwise around the shirt l-34e by the biasing force of the tension spring 40, and comes into contact with the inner surface of the U-shaped member 34c.
Stopper is played.

The configuration in which the stopper plate 36 is rotatable is not limited to the illustrated configuration, but may be other various configurations. In addition, in the embodiment, the tension spring 40 causes the stopper plates 1 and 3 to
6, but other biasing means, e.g.
A biasing force may be applied to the stopper plate by a biasing means such as a compression spring or a leaf spring.

As shown in FIG. 1, the second stopper 18
4 and a cylinder 46 attached to the slider, the slider includes a U-shaped member 44a that slides using the angle steel 29 as a guide, and a U-shaped member 44a that is fixed to the angle steel to hold the slider in a predetermined position. Clamp lever to fix in position
44d. The cylinder 4G is, for example, an air cylinder, and is attached to the slider by attaching the flange 46 to the rear surface of the U-shaped member 44a. Since the piston 48 of the cylinder has a relatively small diameter, it is difficult to press multiple elongated objects at the same time. Therefore, in the embodiment, an L-shaped suppressing piece 48a that constitutes a part of the piston is screwed onto the tip of the piston, thereby making it possible to suppress a plurality of long objects. Of course, the shape of the suppressing piece 48a may be a shape other than I, for example, T-shaped, or a flange may be provided at the tip of the piston, and this flange may be used instead of the suppressing piece. An example of the bending method with the number of bending operations of 2 is shown in FIGS. 3(A) to 3(E). As shown in FIG. Both ends -1L1) shall be added.

5 First, the first and second stoppers 18 and 20 are positioned. The slider 34 is slid and fixed until the stopper plate 1.36 is located at a distance approximately equal to the center length LO of the U-shaped strip from the center guide 14, and the first stopper 18
(See Figure 3 (A)) Also, the distance from the center guide 14 is approximately equal to the sum of the center length LO of the U-shaped bar plus the length L1 at both ends (to be precise, from the total length of the reinforcing bar 24) The second stopper 18 is positioned by sliding and fixing the slider 44 so that the tip of the piston is located at a value obtained by subtracting the center length LD. Second stopper 1
The initial position of the piston 48 of the cylinder at the time of positioning in step 8 is normally the retracted position.

In this way, when the first and second I-bars 18 and 20 are positioned in one row, in the present invention, as will be described later, the same bending process is performed by fixing the positions of the first and second I-abas. You can do it continuously.

After positioning the first and second stoppers 18 and 20, the reinforcing bar 24 is brought into contact with the tip of the piston of the cylinder of the second stopper 18 to position the reinforcing bar. Thereafter, when the bending 60-ra 16 is rotated approximately 80° clockwise, the left end of the reinforcing bar is bent at a right angle (first bending process) (third bending process).
(See Figure CB).

When the bending roller 16 is returned to the initial position and the first bending process is completed, high pressure air is supplied to the cylinder 46 and the piston 48 of the cylinder is extended by a length corresponding to the central length LO of the reinforcing bar. As can be seen from FIG. 1, the first strut horns 18 are set in advance to be separated from the center guide 14 by a length corresponding to the central length LD of the reinforcing bars. Therefore, when the piston of the cylinder is extended to the center length LO, the left end of the reinforcing bar 24 comes into contact with the first stopper 18, and the reinforcing bar is sandwiched between the first stopper pistons.

The piston 48 is stopped when the central iLO is extended.
J24 also moves to the left along with the piston by a distance IIILO. Here, the stopper plate 3G of the first stopper is not fixed and is a rotating part. Therefore, as the piston 48 extends beyond the center length LO, the reinforcing bar 2
Even if the reinforcing bar is fed beyond the distance #LO or the reinforcing bar is fed beyond the distance LO due to inertia, the striker plate 36 rotates counterclockwise to absorb the overfeed amount of the reinforcing bar. . Therefore, the reinforcing bars can be fed without the risk of destroying the first stopper 18 and the cylinder 46 or bending the reinforcing bars 24 and making them defective. In particular, since the cylinder 46 is an air cylinder, the pushing force by the piston 48 can be set small, and the reinforcing bar 24 will not be forcibly pushed against the first stopper 18. From this point of view, the first stopper and cylinder will be destroyed. Reliably prevents reinforcing steel from bending.

Even if the left end of the reinforcing bar 24 comes into contact and the first stopper's spring plate 1.36 is rotated counterclockwise, a clockwise biasing force is applied to the stopper plate 1 by the tension spring 40. Therefore, the stopper plate 1 is connected to the reinforcing bar 24.
Push back clockwise to return to the initial position. Therefore, the reinforcing bar 24 reliably contacts the stopper plate 36,
Accurate positioning is possible. Here, if the biasing force of the compression spring 40 is made stronger than the pushing force of the piston 48 and the amount of extension of the piston is set slightly larger than LO, the reinforcing bar 24
positioning can be performed more accurately.

Then, by rotating the bending roller 16 approximately 80 degrees clockwise, the right end is bent at a right angle (second bending process), and a bent product having the desired shape with the number of bends of 2 is obtained (
(See Figures 3(D) and (E)).

As described above, according to the present invention, once the positions of the first and second stoppers 18 and 20 are set corresponding to the bending shape of the long object (the shape of the bent product), By rotating the cylinder, extending the screw of the cylinder by a length approximately equal to the center length of the reinforcing bar, and rotating the bending roller again, two bending operations can be performed. Therefore,
1st. There is no need to repeat the positioning of the second stopper,
You are free from complicated positioning, the same bending process can be performed continuously, and high workability can be ensured. Of course, variations in the quality of the bent product due to positioning errors are eliminated, and the bending process Z [of a constant quality can be accurately performed. If the three operations of rotation of the machine are controlled by a sequence circuit, etc., and operated in conjunction with the feeding of long objects, it will be easy to automate the bending process and greatly improve the efficiency of the bending process. becomes possible.

Furthermore, according to the present invention, like the known box-shaped bender,
Even if the center guide is 4d, the center length LO that can be processed +-if is LO≧d+4d+d≧6d, and it is possible to bend a long object with a narrow width of 6 times, usually 8 times, the diameter. , which can fully accommodate thinner walls.

Further, the bender 10 can be constructed by simply adding a cylinder stopper 18 to a known box-shaped bender, and compared to a vertical pengoo, the bender 10 can be significantly simplified and made smaller in size. Furthermore, compared to known box-type benders, the structure is not so complicated and can be produced at low cost.

Although an air cylinder is optimal as the cylinder 48, a hydraulic cylinder may be used in combination with a sensor or the like.

Although the bender 10 is most suitable for bending with two bending processes, the present invention is not limited to this, and normal bending can also be performed with this bender as a box-shaped bender.

0 The above-mentioned embodiments are for illustrating this invention, and do not limit this invention in any way, and any modifications, modifications, etc. made within the technical scope of this invention are also included in this invention. Needless to say.

〔Effect of the invention〕

As described in -1-, according to the continuous bending method of the present invention, once the positions of the first and second stoppers are set corresponding to the bending shape of the long object, the first rotation of the bending roller is performed. The number of bending operations is 2.0 by three operations: movement, extension of the piston of the cylinder, and second rotation of the bending roller. Can be bent. Therefore, there is no need to repeat the positioning of the first and second stoppers, and the same bending process can be performed continuously without complicated positioning, thereby ensuring high workability.

In addition, variations in quality due to positioning errors are eliminated.
Bending processing with constant quality can be performed accurately.

Furthermore, the three operations of the first rotation of the bending roller, the extension of the piston of the cylinder, and the second rotation of the bending roller are controlled by a sequence circuit, etc., and are operated in conjunction with the feeding of the long object. , automation of the bending process can be easily achieved, and the efficiency of the bending process can be greatly improved.

In addition, it is now possible to bend long objects six times as narrowly as possible.
It is possible to obtain a narrow bent product that is fully compatible with thinning walls.

Since the bender can be constructed by simply adding a stopper with a cylinder to a known box-shaped bender, it is significantly simpler and more compact in construction than a vertical pengoo. Also,
Compared to known box-type benders, the structure is not so complicated and can be produced at low cost.

The cylinder is an air cylinder, and the second cylinder is in contact with a long object.
If the stopper plate of the stopper is configured to be rotatable under a biasing force in the direction of the initial position, overfeeding of a long object can be absorbed, thereby preventing damage to the first stopper or cylinder or bending of reinforcing bars. It can be prevented.

[Brief explanation of drawings]

1 is a schematic plan view of a bender according to the present invention; FIG. 2 is a plan view of a first stopper; FIGS. 3(A) to (E) are process diagrams of bending according to the present invention; Figures (A) to (E) are process diagrams of bending using a known box-shaped bender; ) and a plan view of a bending product that can be processed. 10: Bender, 12: Housing, 14: Center force id, 16: Bending roller, 18: First stopper, 20
, 2nd S]・Brim 122: Arc groove, 24: Reinforcement bar (long object), 2Ei: Stopper, 28, 29: Angle steel,
30, 31 Niscale, 34, 44 Nislider, 36:
Stopper play i・, 40: Tension spring (biasing means), 4B
+Cylinder 48: Piston, 49d: Suppression piece at the tip of the piston.

Claims (4)

[Claims] (1) Among the first stopper and the second stopper with cylinder, which are respectively arranged at predetermined positions across the center guide,
a step of positioning the long object by bringing one end of the long object into contact with a second stopper; a step of rotating the bending roller around a center guide to perform the first bending process; and a second stopper. A bending process comprising: extending the piston of the cylinder to bring the other end of the long object into contact with a first stopper; and rotating the bending roller again to perform a second bending process. Continuous bending method for long objects as shown in number 2. (2) First and second stoppers are arranged at predetermined positions across the center guide, and one end of the elongated object is brought into contact with the second stopper with a cylinder,
Perform the first bending process, extend the piston of the cylinder of the second stopper, bring the other end of the elongated object into contact with the first stopper, and perform the second bending process on the elongated object with the number of bending processes of 2. Continuous bending method. (3) Position the long object by bringing it into contact with the slidable stopper, rotate the bending roller around the center guide, and bend the long object at the desired angle between the center guide and the bending roller. In the processing bender, the stopper includes a first stopper that is slidably arranged with a center guide in between, and a second stopper loaded with a cylinder, and the long length is moved by the expansion and contraction of the piston of the cylinder of the second stopper. A vendor characterized by the ability to position objects. (4) The cylinder of the second stopper is an air cylinder, and the second stopper includes a slider, a stopper plate that is rotatably attached to the slider, and that is pressed by the piston of the air cylinder and comes into contact with the elongated object; 4. The bender according to claim 3, further comprising biasing means for biasing the stopper plate in the position direction.