JPH1157869A - Bending device for long steel material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the production cost of a bending machine by reducing the number of expensive hydraulic cylinder parts so as to make even a large bending angle work possible with one hydraulic cylinder. SOLUTION: This bending device comprises; the fixed shafts 7a, 7b, one end portion of which swing, the pressure plates 1a, 1b having the supporting shafts 4a, 4b thereon which an swing while sporting the pressure plates, the moving plates 3a, 3b having the fixed shafts 6a, 6b thereon, one end of which are swingable, and the driving shafts 5a, 5b, the connecting plates 2a, 2b, by which the pressure plates and the movable plates are connected each other swingably at the both ends with the supporting shafts 4a, 4b and with the driving shafts 5a, 5b respectively, and the hydraulic cylinders 8a, 8b at downwards of the driving shafts to conduct the bending work of a work (W), and a placing plate 10 which gently supports the work (W) at approximately the center part not to move.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for bending a reinforcing bar used in a building, and to reduce the number of expensive hydraulic cylinders when bending a long reinforcing bar, and particularly to bending at a high angle (about 90 degrees). It relates to a possible bending mechanism.

[0002]

2. Description of the Related Art Conventionally, an apparatus for bending a long object includes a holding apparatus for holding a work, an end holding apparatus for holding an end, and a bending apparatus for bending a long work. Japanese Unexamined Patent Publication No. 3-126222).

Further, there is a stretch vender (Japanese Utility Model Laid-Open No. 4-421) in which a chuck arm on which a chuck portion and a tension cylinder are mounted is mounted on a first arm, and a first working cylinder is mounted on a base.

[0004]

The above-mentioned long object bending apparatus requires a tension cylinder for holding the work (W) when bending the work (W) on an axis because the work (W) is a long object. In the case of bending, there is a disadvantage that a plurality of hydraulic cylinders are required. Because the work (W) is a long object, it is necessary to apply even tension over the entire length. Further, when bending at a high angle, a direction change of the force (approx. 90 degrees).

[0005] The problem to be solved by the present invention is to solve the following problems. This is a bending structure in which the bending force acts uniformly over the entire long object. When converting a reciprocating motion into a bending motion, if the bending angle is large (45 degrees to 90 degrees), a dead point (a point that does not generate a force to rotate the reciprocating motion) occurs because the mechanism is combined, The goal is to develop a mechanism to avoid this dead point.

[0006]

In order to solve the above problems, the present inventor has repeated trial production and experiments and has provided a bending mechanism that can bend a long steel material at a large angle even with a single expensive hydraulic cylinder. The completed long steel bending device was completed.

Pressing plates 1a, 1b provided with supporting shafts 4a, 4b capable of vibrating at one end and supporting fixed shafts 7a, 7b provided at the other end and a pressing plate.
And fixed shafts 6a, 6 having one end vibrated.
b and drive shafts 5a, 5 for transmitting power to the other end.
b provided with movable plates 3a and 3b, and supporting shafts 4a and 4b connected to a pressing plate and a movable plate at both ends to enable mutual vibration.
And the connecting plates 2a and 2b provided with the drive shafts 5a and 5b, and the hydraulic cylinders 8a and 2b for bending the work (W) having a required angle at an angle below the drive shaft when the pressing plate is horizontal.
8b and a bending device for a long steel material comprising a holding plate 10 for holding a substantially central portion of a workpiece (W) thereon so as not to move.

A horizontal groove capable of adjusting the vibrating fixed shafts 7a and 7b in the horizontal direction according to the diameter of the work (W).
11a, 11b and vertical grooves 12a, 12b capable of vertically adjusting the vibrating fixed shafts 6a, 6b are provided in the frame of the bending apparatus, and the horizontal and vertical grooves of the frame are used as guide guides so as to be movably fixed. This is a long steel bending device consisting of a shaft.

The above-mentioned bending device for a long steel material capable of discharging a work (W) by natural fall by tilting a base supporting the bending device in a rearward direction at a required angle.

[0010]

When the bending angle of one hydraulic cylinder is increased (45 degrees or more), the bending force of the hydraulic cylinder is also divided into two parts in the direction of 45 degrees, so the bending force also increases, and the material strength of a frame or the like that maintains the bending force As a result, there is a problem that a large hydraulic cylinder and a large amount of reinforcing material are required. Further, when the bending angle is increased, there is a problem that a dead point occurs at a certain operation point. What solved this problem is the mechanism of the present invention.

A long steel material (W) is placed on a horizontal pressing plate 1a, 1a.
b, and is fixed so as not to move by the holding plate 10 substantially at the center. Next, when the hydraulic cylinders 8a and 8b are operated, the force of the hydraulic cylinder is transmitted from the drive shafts 5a and 5b to the connecting plates 2a and 2b, and further from the support shafts 4a and 4b to the pressing plates 1a and 1b. Since the fixed shafts 7a and 7b are fixed so as to be freely vibrated, the steel material (W) is bent upward at the other end of the pressing plate around the fixed shafts 7a and 7b.

Fixed shafts 6a and 6b and fixed shafts 7a and 7b
And the support shafts 9a and 9b of the intermediate trillion type hydraulic cylinders 8a and 8b are fixed so as to be freely vibrated, and the support shafts 4a and 4b and the drive shafts 5a and 5b provided on the connecting plate move while drawing arcs. . Since the pressure plates 1a and 1b are opposed to each other, the pressure plates 1a and 1b are moved upward by 90 degrees around the fixed shafts 7a and 7b.
And the long steel material (W) is bent 180 degrees around the holding plate 10.

The above-mentioned preferred relationship of the mechanism is expressed by the following ratio. Pressing plate (1a, 1b): Connecting plate (2a, 2b): Moving plate (3a, 3b) =
1: 0.23: 0.71 When the pressure plates 1a and 1b are completely pressurized, the pressure plate 1a and the movable plate 3a form an inverted character, and the pressure plate 1b and the movable plate 3b
Also form an inverted character. When the pressure plates 1a, b are horizontal, the angles αβ (shown in FIG. 2) are equal and form about 140 degrees. When the pressure plates 1a, b are horizontal, the intermediate trillion type hydraulic cylinders 8a, 8b are inclined about 2 to 3 degrees.

Further, since the entire long steel bending apparatus is inclined at about 2 to 3 degrees in the rear direction, when the bending is completed and the hydraulic cylinders 8a and 8b return to the original positions,
Since the steel plates (W) begin to open from the upper portions of the pressurizing plates 1a and 1b, the long steel materials (W) are discharged as they naturally fall toward the rear surface by their own weight.

When the long steel material (W) has a different diameter, the lateral grooves 11a and 11b and the movable plate 3a and the movable plates 3a and 11b are arranged so that the fixed shafts 7a and 7b of the pressing plates 1a and 1b can be adjusted in the horizontal direction.
Vertical grooves 12a and 12b are provided so that the fixed shafts 6a and 6b of 3b can be adjusted in the vertical direction. In the case of a thin long steel material (W), the fixed shafts 7a, 7b of the pressure plates 1a, 1b
The movable plates 3a, 3a toward the center with the holding plate 10 as the center.
Adjust the fixed shafts 6a and 6b of b upward. In the case of a thick long steel material (W), the fixed shafts 7a,
7b, the movable plate 3
Adjust the fixed shafts 6a, 6b of a, 3b downward.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be illustratively described in detail below. However, the configuration method, the configuration device, the configuration content, the dimensions and the materials of the components described in this embodiment,
Unless otherwise specified, shapes, relative arrangements, and the like are not intended to limit the scope of the present invention thereto, but are merely illustrative examples.

The work (W) has a diameter of 10 mm and a length of 12 mm.
When bending a 00 mm circular steel material at the center, preferable dimensions are as follows. Pressure plate (1a, 1b) = 600mm Connecting plate (2a, 2b) = 140mm Movable plate (3a, 3b) = 425mm

One end of each of the pressure plates 1a, 1b is fixed to a vibrating fixed shaft 7a, 7b. One ends of the movable plates 3a, 3b are fixed to the vibrable fixed shafts 6a, 6b. Next, the pressurizing plate and the movable plate are connected to connecting plates 2a and 2b connecting the vibrating support shafts 4a and 4b and the drive shafts 5a and 5b,
Further, the rods of the hydraulic cylinders 8a, 8b are connected to the drive shafts 5a, 5b.
b.

First, FIG. 2 will be described in detail. FIG. 2 shows an initial setting, in which five steel materials, which are works (W), are placed on five concave surfaces on the upper surfaces of the pressure plates 1a and 1b. (Not shown) Next, the center of the work (W) is fixed with the holding plate 10,
When the hydraulic cylinders 8a and 8b are operated, the force of the hydraulic cylinders is transmitted from the drive shafts 5a and 5b connected to the rod to the connecting plate 2
a, 2b and transmitted to the support shafts 4a, 4b of the pressure plate, the other ends of the pressure plate become fixed shafts 7a, 7b.
Move upward in a circle around b.

FIG. 3 shows the middle of the bending operation while pressing the work (W). The force of the hydraulic cylinder is
The work (W), which is five steel materials, is transmitted from the drive shafts 5a and 5b to the connecting plates 2a and 2b, transmitted from the support shafts 4a and 4b to the pressing plates 1a and 1b, and is on the upper surfaces of the pressing plates 1a and 1b.
Is bent around the holding plate 10.

FIG. 4 shows the completion of bending by pressing the work (W). The force of the hydraulic cylinder is
a, 5b to the connecting plates 2a, 2b,
The work of bending the five steel workpieces (W) on the upper surfaces of the pressure plates 1a and 1b is completed by the force obliquely upward from the positions a and 4b.

When the bending operation is completed, the presser plate 10 is raised and the hydraulic cylinders 8a and 8b are returned to their original positions, so that a gap is formed in the pressing plates 1a and 1b. Discharged in the direction. Because the long steel bending device of the present invention is
This is because the work (W) is naturally dropped by its own weight by inclining the work (W) by three degrees, which is one of the important parts of the present invention.

The work (W) is discharged and the pressure plates 1a, 1
b is stopped in a horizontal state, and a new work (W) is placed on the five concave surfaces on the upper surface of the pressure plate. Next, the central part of the work (W) is fixed with the presser plate 10, and the hydraulic cylinders 8a and 8b are operated again as described above to bend the steel material as the work (W) to 180 degrees. Can be.

The long steel material (W) has a diameter of 10 mm,
There are 12 mm, 14 mm, etc., and the horizontal grooves 11a, 11b and the movable plates 3a, 3b so that the fixed shafts 7a, 7b of the pressing plates 1a, 1b can be adjusted in the horizontal direction so as to correspond to each.
So that the fixed shafts 6a and 6b can be adjusted vertically.
12a and 12b are provided. Thin long steel material (W)
In this case, the fixed shafts 7a and 7b of the pressing plates 1a and 1b are adjusted toward the center, and the fixed shafts 6a and 6b of the movable plates 3a and 3b are adjusted upward. In the case of a thick and long steel material (W), the fixed shafts 7a and 7b of the pressing plates 1a and 1b are adjusted outward and the fixed shafts 6a and 6b of the movable plates 3a and 3b are adjusted downward.
The adjustment method is a structure in which the fixed shafts 7a and 7b move in the horizontal direction and the fixed shafts 6a and 6b move in the vertical direction by adjusting the clamping force of the bolts and nuts or by rotating the bolts while displaying the dimensions on the frame. Is also an example of a preferred embodiment.

The embodiment of the present invention has been described above.
The present invention is not limited to such embodiments at all, and it goes without saying that the present invention can be implemented in various modes without departing from the gist of the present invention.

[0026]

Since the present invention is configured as described above, it has the following effects.

When performing a bending operation with a large bending angle with one hydraulic cylinder, a dead point is generated during the operation. Therefore, two hydraulic cylinders are usually used by changing the load direction. However, when the mechanism of the present invention is combined, even a single hydraulic cylinder can be used for a large bending angle (45 degrees to 90 degrees) work or a single hydraulic cylinder, and the number of expensive hydraulic cylinders can be reduced. Since it can be reduced, the manufacturing cost of the bending machine can be reduced.

According to the second aspect, the position of the pressing plate is adjusted in the horizontal direction to correspond to different diameters of the work (W), and the fixed axis of the movable plate is adjusted in the vertical direction, so that various types of work (W) can be adjusted. W) can be evenly weighted over its entire length, and can be used for a wide range of long workpieces (W).

According to the third aspect of the present invention, in the case where a long object folded in two is discharged by the discharging device, the production efficiency of the discharging device and the trouble of operating the discharging device are increased, so that the working efficiency is reduced. There was a problem. Because the work (W)
Due to its own size and weight, it was an inevitable matter that the work efficiency would be reduced if the worker was forced to discharge work.
However, the work (W) itself is naturally discharged to the rear rear by its own weight by slightly tilting the bending device (2 to 3 degrees) in the rear direction, so that the work efficiency is improved and the special discharge device is used. Can be omitted, so that the manufacturing cost of the bending apparatus can be reduced.

[Brief description of the drawings]

FIG. 1 is a front view of the present invention.

FIG. 2 is a front view of a main part of the present invention.

FIG. 3 is a front view of a main part of the present invention.

FIG. 4 is a front view of a main part of the present invention.

[Explanation of symbols]

 1a, 1b ... Pressing plate 2a, 2b ... Connecting plate 3a, 3b ... Movable plate 4a, 4b ... Support shaft 5a, 5b ... Drive shaft 6a, 6b ... Fixed shaft 7a, 7b ... fixed shaft 8a, 8b ... middle trillion hydraulic cylinder 9a, 9b ... support shaft 10 ... holding plate 11a ... lateral groove 12b ... Flute

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[Procedure amendment]

[Submission date] October 2, 1997

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0001

[Correction method] Change

[Correction contents]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for bending a reinforcing bar used in a building, and to reduce the number of expensive hydraulic cylinders when bending a long reinforcing bar, and particularly to bending at a high angle (about 90 degrees). It relates to a bending mechanism that has been enabled.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0013

[Correction method] Change

[Correction contents]

The above-mentioned preferred relationship of the mechanism is expressed by the following ratio. Pressing plate (1a, 1b): connecting plate (2a, 2b): movable plate (3a, 3b) = 1: 0.23: 0.71 connecting plate (2a, 2b) and movable plate (3a, 3b) are added. When the pressure is completed, the connecting plate 2a and the movable plate 3a form an inverted character, and the connecting plate 2b and the movable plate 3b also form an inverted character. When the pressure plates 1a, b are horizontal, the angles αβ (shown in FIG. 2) are equal and form about 140 degrees. When the pressure plates 1a, b are horizontal, the intermediate trillion type hydraulic cylinders 8a, 8b are inclined about 2 to 3 degrees.

Claims (3)

[Claims] 1. A fixed shaft (7a, 7b) provided at one end and a supporting shaft (4a, 4b) capable of vibrating while supporting a pressure plate are provided at one end. A pressure plate (1a, 1b), and a fixed shaft (6a, 6
b) and a drive shaft (5) for transmitting power to the other end.
a, 5b), and a supporting shaft (4a, 4b) and a drive shaft (5a, 5b) that connect the pressing plate and the movable plate to both ends and allow them to vibrate with each other. A connecting plate (2a, 2b) provided; and a hydraulic cylinder (8a, 8b) for bending a work (W) having a pressure plate below the drive shaft when in a horizontal position and inclined at a required angle; And a press plate (10) for holding a substantially central portion of the work (W) so as not to move. 2. According to the size of the diameter of the work (W),
Bending device for horizontal grooves (11a, 11b) that can adjust the vibrating fixed shafts (7a, 7b) in the horizontal direction and vertical grooves (12a, 12b) that can adjust the vibrating fixed shafts (6a, 6b) in the vertical direction The long steel material bending apparatus according to claim 1, further comprising a fixed shaft provided on the frame, wherein the fixed shaft can be movably fixed by using the horizontal groove and the vertical groove of the frame as a guide. 3. The bending of a long steel material according to claim 1, wherein the base supporting the bending device is inclined at a required angle in the rear direction so that the work (W) can be discharged by natural fall. apparatus.