JPH0438527B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a portable bending/cutting machine that can continuously bend and shear bar materials such as reinforcing bars without changing attachments.

[Conventional technology]

Bending of bars such as reinforcing bars
Therefore, a large bending force is required. In a known bending machine (bender), bending is performed by, for example, holding a reinforcing bar between a center roller and a bending roller while the bending roller rotates around the center roller. Ru. That is, the reinforcing bar is held between a center roller and a bending roller, and is bent along the center roller. By pressing the reinforcing bars against the stopper, escape of the reinforcing bars is prevented. The bending roller is installed on a gear located concentrically with the center roller, and the driving force is transmitted to the gear to rotate the gear, thereby causing the bending roller to rotate around the center roller. has been done.

With the above configuration, the bending angle of the reinforcing bar can be easily set in accordance with the rotation angle of the bending roller. That is, by changing the rotation angle of the bending roller, bending at various bending angles can be freely set. Additionally, the reinforcing bars are bent gently around the center roller and do not deform rapidly. The bent end of the bar, the so-called hook, is formed in a shape that corresponds to the center roller and does not form an acute angle.

However, since known vendors use gears as described above, they have a complicated structure and require a large drive source.
The bending roller has a wide movement range, making it difficult to make the bender smaller and lighter.

On the other hand, for shearing (cutting) bar materials such as reinforcing bars, it is sufficient to cross a pair of shearing cutters. One shearing cutter is attached to the tip of the hydraulically driven piston, and the other shearing cutter is fixedly disposed opposite the shearing cutter (movable shearing cutter) on the side of the piston. (cutting machine) can be provided. With this configuration, the bar is easily sheared between the pair of shearing cutters by moving the piston forward or backward. With a cutter having such a configuration, it is sufficient to simply reciprocate the piston, and the stroke of the piston may be small. Therefore, cutters that are easily miniaturized and portable are provided.

[Problem to be solved by the invention]

Conventional bender (bending machine), cutter (cutting machine)
is designed as a specialized machine for either bending or shearing.

By the way, at work sites such as construction work and civil engineering work, bending and shearing of bars such as reinforcing bars are frequently performed in close proximity.

As mentioned above, it is difficult to miniaturize the bender, so large bender is installed at the site, but it requires a large installation area and is difficult to install in a narrow site. On the other hand, portable cutters are available, and shearing can be done quickly at any desired location. However, since the bender is installed at a predetermined position, when bending and shearing are performed continuously, it is necessary to go to the bender's installation position for bending, resulting in poor work efficiency. Furthermore, although shearing can be performed at any desired location using a portable cutter, the cutter and bender are often placed in one place in order to perform the bending and shearing continuously. , Katsuta's mobile functionality is inhibited.

For example, a portable bending/cutting machine that selectively performs bending and shearing is disclosed in Japanese Patent Application Laid-open No. 1983-
Proposed in No. 31279. However, this bending/cutting machine is a manual type in which two levers are gripped and rotated relative to each other, so the levers need to be long, making them large and unsuitable for portable use. In addition, since bending is performed by inserting a bar into the gap between the top and bottom of two levers, it is not possible to set the bar quickly, and depending on the size of the gap between the levers, bending is possible. The size (diameter) of the material is limited. Moreover, the bending angle and bending length are also limited, and the structure tends to become complicated. Furthermore, during bending, it is necessary to remove the cutting plate for shearing from the bending trajectory. For these various reasons, this bending/cutting machine has not yet been put into practical use.

The object of the present invention is to provide a small, lightweight, portable bending/cutting machine that can continuously bend and shear bar materials without requiring attachment replacement or pre-operation.

[Means to solve the problem]

To achieve this object, according to the present invention, a portable bending/cutting machine is provided with a portable drive means having a piston, a main body, one end of which is rotatably attached to the main body, and The rotating arm is operatively connected to the piston of the driving means.

The bending roller and the shearing cutter on the movable side are arranged together on a rotating arm, and the rotating arm is installed on the bottom surface of the main body instead of on the top surface where the center roller and bending stopper are provided. ing. The bending roller on the rotating arm extends beyond the top surface of the main body and rotates around the main body.

[Effect]

According to the above configuration, if the bar is placed between the center roller and the bending stopper, when the rotating arm rotates in conjunction with the movement of the piston, the center roller, the bending stopper, Bending is performed by a bending roller. Further, if a bar is inserted into the notch, shearing is performed by a pair of shearing cutters when the rotating arm rotates. In this way, bending and shearing can be performed arbitrarily depending on the placement position of the workpiece.

In addition, the top surface of the main body is open, and when bending, the bar can be set simply by lowering it onto the main body, making the setting quick and easy.

〔Example〕

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

As shown in FIG. 1, a portable bending/cutting machine 10 according to the present invention includes a portable driving means 12.
and the housing 1 of the driving means by the bolt 11.
3, and a rotating arm 18, one end of which is rotatably attached to the main body 14 by a rotating pin 16.

Since the driving means 12 has a known configuration,
Although its structure will not be described in detail, when the switch 19 is pressed, the motor is started and pressurized oil is sent to the cylinder, thereby moving the piston 20 (see FIG. 2) forward. After the piston moves forward, if the return lever 22 is operated to return the pressurized oil to the reservoir, the piston 20 is moved back and returned to the initial position by the biasing force of the return spring in the cylinder.

As shown in FIG. 2, the rotating arm 18 is operatively connected to the tip of the piston 20, and rotates clockwise (in the direction of the arrow) about the rotating pin 16 when the piston 20 moves forward. Also, piston 20
When it retreats, it rotates counterclockwise around the rotation pin 16. When the piston 20 moves forward and the rotating arm 18 rotates clockwise, bending and shearing are performed as will be described later. The pivot arm 18 is connected to the piston 20 in a known manner, for example by using a connecting pin or by using a combination of engagement protrusions and engagement grooves.
is operatively connected to.

As shown in FIGS. 1 and 2, the main body 14 has a center roller 24 and a bending stopper 26 on its upper surface, and a shearing cutter 2.
8 on its underside. The center roller 24 has a roller 30 and a long hole 32 in the main body.
It is integrally formed with a base portion 34 that is fitted into the base portion 34. The roller 30 extends eccentrically from the base 34, and as shown in imaginary lines in FIG. Bending at different angles is possible.

In addition, in the embodiment, if the roller 30 is located at the position shown by the solid line or imaginary line in FIG.
It is configured to allow bending of 90° or nearly 135°. The roller 30 may be formed integrally with the main body 14, and the bending angle may be adjusted by the rotation angle of the bending roller. Further, the roller 30 has a reverse tapered shape,
In other words, the diameter becomes smaller as it approaches the base 34. Therefore, the workpiece is prevented from escaping upward during bending.

The bending stopper 26 includes a block 36 fixed to the main body 14 and a bolt 38 screwed into a tap hole in the block, and is provided on the upper surface of the main body 14 facing the center roller 24. . By screwing the bolt 38 forward or backward, a distance L corresponding to the diameter of the workpiece is set between the roller 30 of the center roller and the head of the bolt 38.
A compression coil spring 40 is wound around the bolt 38 and is disposed between the block 36 and the bolt head.

In such a configuration, a pushing force is applied to the bolt 38 by the spring 40, thereby preventing the bolt from loosening. Therefore, movement of the bolt 38 is prevented. Moreover, a locking nut is omitted, and the distance L can be easily set by rotating the bolt with one touch.

Furthermore, a notch 42 is formed in the main body 14. This notch 42 is not limited to a rectangular shape as shown in the figure, as long as it has a shape that accommodates the bar material to be cut from the side. Then, the shearing cutter (fixed cutter) 28 on the fixed side is inserted into the notch 4.
The mounting groove 29 on the bottom surface of the main body along the right side surface 43 of 2
It is located in Of course, the fixed cutter 28 may be attached to the main body from the top or side by providing the attachment groove 29 on the top or side.

On the other hand, the rotating arm 18 includes a bending roller 44 and a shearing cutter (movable cutter) 46 on a movable side. The bending roller 44 is mounted on the rotating arm 18 so as to be rotatable around the main body 14 and extends beyond the upper surface of the main body. The movable cutter 46 is connected to the rotating arm 18
It is disposed in a mounting groove 47 formed on the upper surface of the main body 14, and performs shearing in cooperation with the fixed cutter 28 of the main body 14.

In the embodiment, the shearing stopper 48
is provided on the upper surface of the main body 14. This stopper 48 has the same structure as the bending stopper 26 described above. In other words, the stopper 48 is connected to the block 136 fixed to the main body 14.
and the bolt 13 screwed into the tap hole of the block.
8, and a compression coil spring 1 disposed between the block and the head of the bolt to prevent the bolt from loosening.
40. As the bolt 38 is screwed forward and backward, the distance M corresponding to the diameter of the workpiece changes from the right side surface 4 of the notch.
3 and the bolt head.

Bending roller 4 on rotating arm 18
4. The movable cutter 46 is disposed at a sufficient distance from the rotation pin 16, which is the center of rotation, so as to generate predetermined bending and shearing forces. Normally, the force required for bending is greater than the force required for shearing, so as shown in the embodiment, the rotating pin 16 is placed at one end of the rotating arm 18, and the bending roller 44 is placed at the other end of the rotating arm. It can be said that a configuration in which the movable cutters 46 are respectively disposed between the rotation pin and the bending roller can be said to be common. However, it is sufficient to generate a predetermined bending force and shearing force, and the arrangement position is not limited to that of the embodiment. For example, the movable cutter 46 may be provided at the other end of the rotating arm 18, and the bending roller 44 may be provided between the rotating pin 16 and the cutter 46.

Bending and shearing by the bending/cutting machine 10 having the above configuration is performed in the following manner.

First, to explain bending, the third
As shown in the figure, the bar to be bent,
For example, a reinforcing bar 50 is set between the center roller 24 and the bending stopper 26. In this invention, since the rotary arm 18 is provided on the bottom surface of the main body 14 and the top surface of the main body is open, setting can be done by simply lowering it onto the main body, and there is no difficulty in setting the bar, making it quick and easy. Ru. Also, reinforcing bar 5
Reinforcement bars can be set under the same conditions whether bending at the 0 end or center. Then, the bolt 38 of the stopper is threaded to clamp the reinforcing bar 50 between the roller 30 of the center roller and the bolt head. There is no problem even if this screwing operation of the bolt 38 is omitted and a gap is left between it and the reinforcing bar 50.

Then, actuate the drive means 12 to drive the piston 2.
When moving 0 forward, in response to the forward movement of the piston,
The rotating arm 18 rotates clockwise about the rotating pin 16. According to the rotation of the rotating arm, the bending roller 44 presses the reinforcing bar 50 against the roller 30 of the center roller, and the reinforcing bar escapes from the bending stopper 26.
This is prevented by Therefore, the reinforcing bar 50 is bent between the bending roller 44 and the roller 30, and bending of approximately 90° is performed as shown in the imaginary line.

Note that, as described above, the roller 30
If it is located away from the stopper 38 shown by the imaginary line in the figure, bending of approximately 135° can be performed. Since the rotating arm 18 rotates on the lower surface of the main body 14, there are no obstacles that prevent the rotating arm from rotating. Therefore, the rotation angle of the rotation arm is not limited, and bending of 180 degrees can be performed. Furthermore, since there are no obstacles on the rotation locus of the reinforcing bar 50 to be bent, bending can also be performed at the center of the reinforcing bar.

Then, return lever 22 (see Figure 1)
When the piston 20 is retracted, the pivot arm 18 is returned to its initial position and, if necessary, the next bending is performed again as described above.

On the other hand, for shearing, the reinforcing bar 52 to be sheared is accommodated in the cutout 42, as can be seen in FIG. Then, screw the bolt 138 of the stopper to the right side 43 of the notch.
A reinforcing bar 52 is held between the bolt head and the bolt head.

Thereafter, the driving means 12 is started to drive the piston 20.
When the piston moves forward, the pivot arm 18 pivots clockwise about the pivot pin 16 in response to the advance of the piston. Then, while preventing the reinforcing bar 52 from escaping with the stopper 48, the rotating arm 18
Shearing cutter (movable cutter) on the top surface of
46 and a shearing cutter (fixed cutter) 28 on the lower surface of the main body, the reinforcing bar 52 is sheared.

After shearing, return lever 22 (first
When the piston 20 is retracted by operating the piston 20 (see figure), the rotary arm 18 is returned to its initial position, and the next shearing can be similarly performed if necessary.

As described above, according to the present invention, the same rotational movement of the rotational arm 18 can be started as bending in some cases, and bending and shearing can be performed selectively. In this way, bending and shearing can be performed continuously and quickly with a single machine without replacing the attachment, such as the rotating arm 18, and work efficiency is dramatically improved. Further, since the top surface of the main body 14 is open and there are no obstacles, there is no need for pre-operation such as removing unnecessary members.

In addition, since the bending/cutting machine of the present invention is equipped with a portable drive means and is configured to be portable, it does not require an installation area and can be fully used even in a narrow site by taking advantage of its portable function. is not limited.

Because it is piston-driven rather than manual, large bending and shearing forces can be easily obtained.
Bending and shearing can be performed without tiring the operator.

Furthermore, since the bending roller 44 is rotated around the center roller 24, the bar 5
The bending angle of 0 can be easily set in accordance with the rotation angle of the bending roller. That is, by changing the rotation angle of the bending roller 44, bending at various bending angles can be freely set. The bar 50 is attached to the center roller 24
It bends gently around the , and does not deform rapidly.
The bent end of the bar, the so-called hook, is formed in a shape that corresponds to the center roller 24 and does not form an acute angle.

The reinforcing bar 50 to be bent is the main body 14
The reinforcing bars 52 to be sheared parallel to
They are each set perpendicular to the main body 14. Therefore, there is no possibility that the bending stopper 26 interferes with the setting of the reinforcing bar 52, and shearing can be performed regardless of the position of the bending stopper 26.

In the embodiment, as can be seen from FIGS. 2 and 3, the bolt 138 of the shearing stopper 48 is screwed up to the set position of the reinforcing bar 50, and
There is a possibility that the setting of 2. Therefore, the shearing stopper 48, notch 42, and cutters 28, 46 are moved to the left from the positions shown in the figure.
The bolts 138 may be configured so as not to interfere with the setting of the reinforcing bars 52. With such a configuration, bending and shearing can be performed without being hindered by the stoppers 26 and 46, further increasing work efficiency.

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

For example, in the embodiment, the rotating arm rotates in conjunction with the forward movement of the piston, thereby performing bending and shearing. However, bending and shearing may be performed in conjunction with the backward movement of the piston. Alternatively, one of bending and shearing may be performed in conjunction with the forward movement of the piston, and the other may be performed in conjunction with the backward movement of the piston.

〔Effect of the invention〕

As described above, according to the present invention, the same rotational movement of the rotating arm can be performed depending on the arrangement position of the bar.
In some cases it is used for bending and in other cases it is used for shearing. Therefore,
Bending and shearing can be performed continuously and quickly with a single machine without replacing attachments, dramatically improving work efficiency.

Furthermore, since the top surface of the main body is open and there are no obstacles, there is no need for pre-operation such as removing unnecessary members. The bar to be bent can be set simply by placing it on the top of the main body, making the setting quick and easy, and bending the bar at any position.
Bar stock can be set quickly and easily. Since there are no obstacles on the trajectory of the bar to be bent, the length of the end of the bar (bending length) is also not limited.

Since the bending roller is provided on a rotating arm that rotates on the lower surface of the main body and rotates around the main body, the angle of rotation is not limited. By changing the rotation angle, various bending angles can be freely set without causing sudden deformation of the workpiece.

Further, since the bending/cutting machine of the present invention is not a manual type using a lever, the structure is not complicated, and it is equipped with a portable drive means, making it portable and lightweight. Therefore, it does not require much installation space and can be fully used even in narrow workplaces by taking advantage of its portable function, and there are no restrictions on where it can be used.

Because it is piston-driven rather than manual, the necessary bending and shearing forces can be easily obtained.
Bending and shearing can be performed without tiring the operator.

[Brief explanation of drawings]

Fig. 1 is a schematic front view of a bending/cutting machine according to the present invention, Fig. 2 is a partially enlarged view of the bending/cutting machine, and Figs. Similar to FIG. 2 in the configured state. It is a partial enlarged view of the bending/cutting machine. 10... Portable bending/cutting machine, 12... Drive means, 14... Main body, 16... Rotating pin (rotation center), 18... Rotating arm, 20... Piston,
24... Center roller, 26... Bending stopper, 28, 46... Shearing cutter, 30... Center roller roller,
42... Notch, 43... Right side of the notch, 44
... Bending roller, 48 ... Stopper for shearing, 50 ... Reinforcement bar (bar to be bent), 52 ... Reinforcement bar (bar to be sheared).

Claims (1)

[Claims] 1. A portable driving means equipped with a piston, a center roller and a bending stopper facing the center roller are provided on the upper surface, and a notch and a bar extending through the notch are sheared. a fixed-side shearing cutter, the cutter being rotatably attached to the main body on the lower surface of the main body, and one end of which is rotatably attached to the main body on the lower surface of the main body, and a shearing cutter with a fixed side provided along the side of the notch; a pivoting arm operatively connected to a piston of the drive means at a position, the pivoting arm being operable to cooperate with a shearing cutter on a fixed side of the body; A portable bending device that is equipped with a center roller of the main body that is rotatable around the main body, and a bending roller that extends beyond the top surface of the main body so that it can bend the bar on the top surface of the main body in cooperation with a bending stopper. Combined cutting machine. 2. Claim 1, wherein the bending roller is disposed at the other end of the rotating arm, and the shearing cutter is disposed between the bending roller and the center of rotation of the rotating arm. A portable bending and cutting machine. 3. A bending stopper includes a block fixed to the main body, a bolt screwed into a tap hole of the block, and a compression spring wound around the bolt and disposed between the block and the bolt head. A portable bending/cutting machine according to item 1 or 2. 4. The portable bending/cutting machine according to any one of claims 1 to 3, wherein the shearing stopper is disposed on the main body adjacent to the notch.