JP7080487B2 - Reinforcing bar bending method - Google Patents

Description

The present invention relates to a reinforcing bar bending method for bending a reinforcing bar into a predetermined shape.

Conventionally, a reinforcing bar is bent to form a predetermined shape. In this bending process, the fulcrum member, the bending roller (force point member) rotated around the fulcrum member, and the reaction force receiving portion (reinforcing bar receiving member) received on the side opposite to the bending direction during the bending process of the reinforcing bar. ), A reinforcing bar bending device (reinforcing bar bending machine) that bends the reinforcing bar is used. Using this reinforcing bar bending device, bending is performed while manually holding the reinforcing bar, and for example, bending such as bending the reinforcing bar into a three-dimensional structure is performed.

Further, for example, in Patent Document 1, in a conventional reinforcing bar bending device, when bending a reinforcing bar by rotation of a bending roller, a holding member that sandwiches and fixes the reinforcing bar by a cooperative action with a reaction force receiving portion (reinforcing bar receiving member) is provided. A reinforcing bar receiver that can be freely held and bent by a bending roller to receive the tip side of the reinforcing bar from below is placed along the reinforcing bar base end side portion that is in contact with the reaction force receiving portion (reinforcing bar receiving member). A structure is disclosed in which a reinforcing bar receiver is mounted so as to be swingable up and down around the axis, and an operation portion for operating the reinforcing bar receiver is provided.
According to the configuration of Patent Document 1, the fixing of the reinforcing bar can be securely fixed by the holding member, and the reinforcing bar is supported from the lower side by the reinforcing bar receiver, the direction of the reinforcing bar is changed, and the three-dimensional structure is bent. Makes the product easier to manufacture.

JP-A-2015-116594

However, although the device disclosed in Patent Document 1 facilitates three-dimensional bending of the reinforcing bar, there is a problem that the reinforcing bar bending device becomes complicated due to the provision of the reinforcing bar receiver and the holding member. Further, since the holding member disclosed in Patent Document 1 has a structure in which a member that opens and closes is provided at the reaction force receiving portion (reinforcing bar receiving member), it has a sturdy structure that can withstand a large force during bending. It has to be provided in this operating member, and there is a problem that the device itself becomes large in addition to the complexity of the reinforcing bar bending device.

Further, in the bending process using the conventional reinforcing bar bending device, when the bent portion of the reinforcing bar is brought close to each other to manufacture a fine bent product, the fulcrum member is sandwiched between the driving side of the bending roller (power point member). It is necessary to bring the gripping position of the reinforcing bar on the opposite side closer to the fulcrum member.
However, since the reinforcing bar receiving member is provided on the opposite side of the fulcrum member from the driving side of the bending roller (power point member), there is a limit to the gripping position of the reinforcing bar. Further, it is conceivable to make the reinforcing bar receiving member smaller, but if the reinforcing bar receiving member is made smaller, there is a problem that the strength of holding the reinforcing bar at the time of bending is weakened.

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a reinforcing bar bending method capable of avoiding complicatedness and large size of a reinforcing bar bending device and capable of fine bending.

The above problem can be achieved by the following means. That is, the present invention is as follows.
[1]
A reinforcing bar bending method for bending a reinforcing bar by using a reinforcing bar bending device including a fulcrum member constituting a fulcrum of bending and a force point member rotating around the fulcrum member.
A reinforcing bar supply member having a clamp portion for gripping the reinforcing bar is used, and the reinforcing bar is supplied between the fulcrum member and the power point member in a state of being gripped by the clamp portion.
A method of bending a reinforcing bar in which the force point member is rotated in a state where the clamp portion gripping the reinforcing bar is in contact with a reinforcing bar receiving member provided in the reinforcing bar bending device.

[2]
The reinforcing bar bending method according to [1].
The reinforcing bar supply member includes a pair of arm portions each having a clamp portion for gripping the reinforcing bar.
A method of bending a reinforcing bar in which the force point member is rotated in a state where the clamp portion of one of the pair of arm portions is in contact with the reinforcing bar receiving member.

[3]
The reinforcing bar bending method according to [1] or [2].
A method of bending a reinforcing bar in which the reinforcing bar is sandwiched by at least a pair of claw members of the clamp portion so as to surround the outer periphery of the reinforcing bar, and the force point member is rotated while the claw member is in contact with the reinforcing bar receiving member.

[4]
The reinforcing bar bending method according to [3].
A method of bending a reinforcing bar in which the contact between the claw member and the reinforcing bar receiving member is brought into surface contact on a surface orthogonal to the direction of the force toward the reinforcing bar receiving member when the force point member rotates.

According to the reinforcing bar bending method of [1], a reinforcing bar supply member provided with a clamp portion for gripping the reinforcing bar is used, and the reinforcing bar is supplied between the fulcrum member and the force point member while the reinforcing bar is gripped by the clamp portion, and the reinforcing bar is supplied. Since the force point member is rotated while the gripped clamp portion is in contact with the reinforcing bar receiving member provided in the reinforcing bar bending device, the bending process can be performed while the reinforcing bar is gripped by the clamp portion. It is possible to reliably hold the reinforcing bar and perform bending without providing the bending device with a gripping structure for the reinforcing bar.
Further, by setting the position of the clamp portion at the time of bending the reinforcing bar to the same position as the reinforcing bar receiving member, the gripping position of the reinforcing bar can be brought closer to the fulcrum member. As a result, the reinforcing bar can be gripped at a position closer to the bending portion than in the conventional case, and the bending process can be performed with a shorter interval between the bending processing positions, so that a bending processed product finer than the conventional one can be provided.
Further, since this gripping position (position of the clamp portion) is brought into contact with the reinforcing bar receiving member while gripping the reinforcing bar, the gripping position can be brought closer to the fulcrum member without making the reinforcing bar receiving member smaller. Fine bending can be performed without reducing the strength of the.

According to the reinforcing bar bending method of [2], the reinforcing bar supply member is provided with a pair of arm portions each having a clamp portion for gripping the reinforcing bar, and the clamp portion at the tip of one arm portion is in contact with the reinforcing bar receiving member. Since the force point member is rotated, the pair of arm portions can perform continuous bending while holding the reinforcing bar by the arm portion and changing the direction and grip of the reinforcing bar.

According to the reinforcing bar bending method of [3], the claw member is brought into contact with the reinforcing bar receiving member while being sandwiched by at least one pair of claw members of the clamp portion so as to surround the outer periphery of the reinforcing bar, so that the position of the reinforcing bar receiving member is located. The reinforcing bar can be stably held so that it does not move in any of its radial directions. As a result, it is possible to effectively suppress the positional deviation of the reinforcing bar during bending, and it is possible to perform bending with higher accuracy.

According to the reinforcing bar bending method of [4], the contact between the claw member and the reinforcing bar receiving member is brought into surface contact on a surface orthogonal to the direction of the force toward the reinforcing bar receiving member side when the force point member rotates. Therefore, the force received by the reinforcing bar receiving member during the reinforcing bar bending process can be reliably received on the surface. As a result, it is possible to provide a structure in which the reinforcing bar retention during bending of the reinforcing bar is more stable and can withstand a larger bending force.

It is a top view which shows one Embodiment of the reinforcing bar bending processing equipment which applied the reinforcing bar bending method of this invention. It is an enlarged perspective view of the arm part shown in FIG. It is an enlarged perspective view of the tip part of the arm part shown in FIG. FIG. 3 is an enlarged perspective view of a main part of the reinforcing bar bending device shown in FIG. 1. FIG. 3 is a perspective view showing an initial state in which a reinforcing bar is set in the reinforcing bar bending device in the reinforcing bar bending method using the reinforcing bar bending device shown in FIG. 1. FIG. 3 is a perspective view showing a state in which a force point member is operated in a reinforcing bar bending method using the reinforcing bar bending device shown in FIG. 1. 6 is a cross-sectional view taken along the line XX in FIG. It is a perspective view at the time of performing a three-dimensional bending process in the reinforcing bar bending method using the reinforcing bar bending apparatus shown in FIG. 1.

Hereinafter, an embodiment of the reinforcing bar bending equipment to which the reinforcing bar bending method of the present invention is applied will be described with reference to FIGS. 1 to 8.

The reinforcing bar bending equipment 1 shown in FIG. 1 is roughly divided into a reinforcing bar bending device 10, a reinforcing bar supply member 2 that supplies the reinforcing bar 20 to the reinforcing bar bending device 10, and a conveyor 17 that supplies the reinforcing bar 20 to the reinforcing bar supply member 2. And have. Then, the reinforcing bar 20 is conveyed by the transport conveyor 17 to a position where the reinforcing bar 20 can be gripped by the reinforcing bar supply member 2, the reinforcing bar 20 is gripped by the reinforcing bar supply member 2, and is set at a predetermined position of the reinforcing bar bending device 10. After that, the reinforcing bar 20 is bent by the drive of the reinforcing bar bending device 10 as described later in a state of being gripped by the reinforcing bar supply member 2.

As shown in FIG. 1, the transport conveyor 17 includes a large number of rollers 17r, and the reinforcing bars 20 that are linearly cut to a predetermined length are moved, for example, in the lateral direction (diameter direction of the reinforcing bars). It is configured so that the reinforcing bar 20 can be temporarily placed in the mounting area near the reinforcing bar bending device 10 by transporting the reinforcing bar.

As shown in FIG. 1, the reinforcing bar supply member 2 has, for example, a robot arm structure including a pair of left and right arm portions 3 (3L, 3R). That is, the arm portion 3 is provided with a clamp portion 4 on the arm mount 3a at the tip portion via, for example, each of the four arm portions. With the pair of left and right clamp portions 4, the reinforcing bar 20 can be gripped and supplied to the reinforcing bar bending device 10, and the reinforcing bar 20 can be re-grabbed and the direction of the reinforcing bar 20 can be appropriately changed to perform three-dimensional bending. .. The arm portion 3 is automatically controlled by a preset programming, interlocks with the reinforcing bar bending device 10, and can bend the reinforcing bar 20 fully automatically.

As shown in FIG. 2, the arm portion 3 is attached to, for example, a first arm portion 3b that can rotate in the horizontal direction (direction of arrow B) on the arm mount 3a and a vertical surface attached to the tip portion of the first arm portion 3b. The second arm portion 3c that can rotate along the vertical surface (direction of arrow C) and the second arm portion 3c that is attached to the tip of the second arm portion 3c and can also rotate along the vertical plane (direction of arrow D) and expand and contract (arrow). In the axial direction of the third arm portion 3d, which is attached to the tip of the third arm portion 3d and is capable of rotating in the E direction) and rotating around the axis in the expansion / contraction direction (arrow F direction). It has a fourth arm portion 3e that can rotate in the direction of inclination (arrow G direction), and further, at the tip of the fourth arm portion 3e, for example, swinging and turning (arrow H direction and arrow I). A clamp portion 4 capable of (direction) is provided. With the arm portion 3 configured in this way, the gripping direction of the reinforcing bar 20 can be freely adjusted.

As shown in FIGS. 2 and 3, the clamp portion 4 is provided with a pair of claw members 5 at the tip portions. The pair of claw members 5 are supported by, for example, a clamp portion body portion 4b so as to be slidable so as to be able to perform a so-called opening / closing operation (direction of arrow J) in which the claw members 5 approach and separate from each other.
Here, on the tip end side of the pair of claw members 5, holding grooves 5 g having a substantially semicircular cross section that can be contacted so as to surround the outer peripheral surface of the reinforcing bar 20 when gripping the reinforcing bar 20 are provided facing each other. ing.

Therefore, the reinforcing bar 20 can be securely gripped in a state where the reinforcing bar 20 is sandwiched in the sandwiching groove 5g of the claw member 5, and the bending process by the reinforcing bar bending device 10 can be performed in this gripped state. .. Further, the claw member 5 is provided with a flat surface 5s parallel to the longitudinal direction of the holding groove 5g (the axial direction of the reinforcing bar 20) on the side opposite to the side where the holding groove 5g for holding the reinforcing bar 20 is provided. There is. As will be described later, the flat surface 5s functions as a contact surface where the claw member 5 abuts on the reinforcing bar receiving member 18.

The reinforcing bar bending device 10 includes a fulcrum member 11 that constitutes a fulcrum for bending, a force point member 12 that rotates around the fulcrum member 11 to apply a bending force to the reinforcing bar 20, and when a bending force is applied to the reinforcing bar 20. A reinforcing bar receiving member 18 that supports the reinforcing bar 20 on the side opposite to the side that is bent toward the ground is provided so as to project upward from the upper end surface 10s of the machine base 10a.

More specifically, as shown in FIG. 4, the fulcrum member 11 is firmly fixed to the machine base 10a by a cylindrical rod member that projects perpendicularly to the upper end surface 10s. The force point member 12 is provided with a drive shaft 12f rotatably (in the direction of arrow A) around the fulcrum member 11 along, for example, an arc-shaped opening 10g formed on the upper end surface 10s, and the tip of the drive shaft 12f is provided. Is provided with a rotatable rotary roll 12r that applies a bending force to the reinforcing bar 20.

The reinforcing bar receiving member 18 is composed of a block-shaped member that protrudes perpendicularly to the upper end surface 10s, and is firmly fixed to the machine base 10a. The receiving surface 18s that receives a force from the reinforcing bar 20 during bending is configured as a surface that is parallel to the insertion line PL (see FIG. 1) of the reinforcing bar 20 and is perpendicular to the height direction. Further, the reinforcing bar receiving member 18 is provided so as to be set back so that the receiving surface 18s is separated from the insertion line PL of the reinforcing bar 20 by a predetermined distance (d). As will be described later, this is a structure in which the clamp portion 4 is brought into contact with the reinforcing bar receiving member 18 while the reinforcing bar 20 is gripped, so that a space corresponding to the thickness of the claw member 5 of the clamp portion 4 is secured. be.

Hereinafter, a reinforcing bar bending method using the reinforcing bar bending processing equipment 1 will be described with reference to FIGS. 5 to 8.

First, the reinforcing bar 20 on the conveyor 17 is gripped by the pair of arm portions 3 and moved to the side of the reinforcing bar bending device 10. Then, as shown in FIG. 5, a reinforcing bar 20 is inserted between the fulcrum member 11 and the force point member 12, and the bent portion of the reinforcing bar 20 is set so as to correspond to the fulcrum member 11. At this time, the clamp portion 4 on one side (left side in the figure) is positioned so as to hit the reinforcing bar receiving member 18 of the reinforcing bar bending device 10.

After that, as shown in FIG. 6, the force point member 12 is driven so as to rotate around the fulcrum member 11 (in the direction of arrow A). As a result, the reinforcing bar 20 is bent by a predetermined angle with the fulcrum member 11 as a bending fulcrum. At this time, a force (arrow Cf) that tends to turn in the direction opposite to the bending direction of the reinforcing bar 20 is applied, and the reinforcing bar 20 is pushed toward the reinforcing bar receiving member 18.

As shown in FIG. 7, the force (arrow Cf) for turning the reinforcing bar 20 in the direction opposite to the bending direction is received by the reinforcing bar receiving member 18. Here, the reinforcing bar 20 at the portion where the reinforcing bar receiving member 18 is pushed is gripped by the claw member 5 so as to surround the outer peripheral surface, and one of the claw members 5 is pressed against the reinforcing bar receiving member 18.

Here, as shown in FIG. 7, the flat surface 5s of the claw member 5 and the receiving surface 18s of the reinforcing bar receiving member 18 are in surface contact with each other. Further, the direction of the contact surface between the flat surface 5s and the receiving surface 18s is orthogonal to the direction of the turning force (arrow Cf) accompanying the bending force of the force point member 12. As a result, the first bending process is performed while the reinforcing bar 20 is securely held so as not to move in any direction.

Next, after the first rotation of the force point member 12 is completed, as shown in FIG. 8, the force point member 12 returns to its standby position (the same position as the position shown in FIG. 5). After that, by operating the arm portion 3, the reinforcing bar 20 is rotated by 90 degrees, and the reinforcing bar 20 is moved to the front side (lower left side in FIG. 8) by changing the holding by the clamp portion 4 on the left side. As a result, the reinforcing bar 20 is set at the second bending position (state shown in FIG. 8). At this time, the claw member 5 of the clamp portion 4 on the left side is positioned so as to hit the reinforcing bar receiving member 18. After that, the force point member 12 rotates in the same manner as the previous time, and a second bending process different from the first bending process, for example, in a direction of 90 degrees is performed. In this way, bending is sequentially performed to produce a predetermined processed product.

As described above, in the present embodiment, as described above, the reinforcing bar supply member 2 provided with the clamping portion 4 for gripping the reinforcing bar 20 is used, and the reinforcing bar 20 is gripped by the clamping portion 4, and the fulcrum member 11 and the force point are used. Since the force point member 12 is rotated in a state where the clamp portion 4 supplied between the members and 12 and gripping the reinforcing bar 20 is in contact with the reinforcing bar receiving member 18 provided in the reinforcing bar bending device 10, the reinforcing bar 20 is rotated. Since the bending process can be performed while being gripped by the clamp portion 4, the reinforcing bar 20 can be reliably held and bent without providing the reinforcing bar bending device 10 with a gripping structure for the reinforcing bar 20.

Further, by setting the position of the clamp portion 4 at the time of bending the reinforcing bar 20 to the same position as the reinforcing bar receiving member 18, the gripping position of the reinforcing bar 20 can be brought closer to the fulcrum member 11. As a result, the reinforcing bar 20 can be gripped at a position closer to the bending portion than in the conventional case, and the bending process in which the interval between the bending processing positions is narrowed becomes possible, and a bending processed product finer than the conventional one can be provided.
Further, since this gripping position (position of the clamp portion 4) is brought into contact with the reinforcing bar receiving member 18 while gripping the reinforcing bar 20, the gripping position can be brought closer to the fulcrum member 11 without making the reinforcing bar receiving member 18 smaller. It is possible to perform fine bending without causing a decrease in the strength of the reinforcing bar receiving member 18.

Further, in the present embodiment, the reinforcing bar supply member 2 includes a pair of arm portions 3 each having a clamp portion 4 for gripping the reinforcing bar 20, and the clamp portion 4 at the tip of one arm portion 3 is attached to the reinforcing bar receiving member 18. Since the force point member 12 is rotated in the abutted state, the pair of arm portions 3 can perform continuous bending to change the direction and grip of the reinforcing bar 20 while being held by the arm portion 3. can.

In the present embodiment, the claw member 5 is brought into contact with the reinforcing bar receiving member 18 in a state of being sandwiched by at least a pair of claw members 5 of the clamp portion 4 so as to surround the outer periphery of the reinforcing bar 20, so that the reinforcing bar receiving member 18 is used. The reinforcing bar 20 can be stably held at the position so as not to move in any direction in the radial direction of the reinforcing bar. As a result, it is possible to effectively suppress the positional deviation of the reinforcing bar 20 during bending, and it is possible to perform bending with higher accuracy.

Further, in the present embodiment, the contact between the claw member 5 and the reinforcing bar receiving member 18 is surface-contacted on a surface orthogonal to the direction of the force toward the reinforcing bar receiving member 18 when the force point member 12 rotates. Therefore, the force (arrow Cf) received by the reinforcing bar receiving member 18 during the reinforcing bar bending process can be reliably received on the surface. As a result, the holding of the reinforcing bar 20 at the time of bending becomes more stable, and the structure can withstand a larger bending force.

Although one embodiment of the present invention has been described above, the present invention is not limited to this, and for example, the arm portion 3 including the shape of the clamp portion 4 or the claw member 5 is limited to the structure of the above embodiment. Instead, it can be changed as needed. Further, the reinforcing bar bending device 10 to which the reinforcing bar bending method of the present invention is applied is not limited to the structure of the above embodiment including the shape of the reinforcing bar receiving member 18.

1 Reinforcing bar bending equipment 2 Reinforcing bar supply member 3 Arm part 4 Clamp part 5 Claw member 10 Reinforcing bar bending device 11 Supporting point member 12 Power point member 17 Conveying conveyor 18 Reinforcing bar receiving member 20 Reinforcing bar

Claims (4)

A reinforcing bar bending method for bending a reinforcing bar by using a reinforcing bar bending device including a fulcrum member constituting a fulcrum of bending and a force point member rotating around the fulcrum member.
A reinforcing bar supply member having a clamp portion for gripping the reinforcing bar is used, and the reinforcing bar is supplied between the fulcrum member and the power point member in a state of being gripped by the clamp portion.
A method of bending a reinforcing bar in which the force point member is rotated in a state where the clamp portion gripping the reinforcing bar is in contact with a reinforcing bar receiving member provided in the reinforcing bar bending device. The reinforcing bar bending method according to claim 1.
The reinforcing bar supply member includes a pair of arm portions each having a clamp portion for gripping the reinforcing bar.
A method of bending a reinforcing bar in which the force point member is rotated in a state where the clamp portion of one of the pair of arm portions is in contact with the reinforcing bar receiving member. The reinforcing bar bending method according to claim 1 or 2.
A method of bending a reinforcing bar in which the reinforcing bar is sandwiched by at least a pair of claw members of the clamp portion so as to surround the outer periphery of the reinforcing bar, and the force point member is rotated while the claw member is in contact with the reinforcing bar receiving member. The reinforcing bar bending method according to claim 3, wherein the reinforcing bar is bent.
A method of bending a reinforcing bar in which the contact between the claw member and the reinforcing bar receiving member is brought into surface contact on a surface orthogonal to the direction of the force toward the reinforcing bar receiving member when the force point member rotates.

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