JP2009012029A - Bending device for reinforcing bar - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To facilitate improvement in working efficiency even when a bending direction of a reinforcing bar in a place where is bent precedingly and a bending direction of the reinforcing bar in a place where is bend succeedingly are reverse each other. <P>SOLUTION: A bending device for the reinforcing bar is provided with: an elevating and lowering mechanism by which the reinforcing bar clamped with a clamping machine B can be driven, elevated and lowered relatively to a reinforcing bar bending machine A; and an appearing and retreating mechanism by which a supporting point rollers 4 and a dynamic point rollers 5 can be driven and moved from a projected position where the reinforcing bar is bent to a retired position where the reinforcing bar is fallen out of between the supporting point rollers and the dynamic point rollers. In a stage where the reinforcing bar clamped with the clamping machine is bent in a plurality of places, a first control section is provided so that the operations of the elevating and lowering mechanism and appearing and retreating mechanism are controllable so as to be able to switch a state where the reinforcing bar bending machine is operated in a downward bending mode for bending the reinforcing bar downward and a state where the reinforcing bar bending machine is operated in an upward bending mode for bending the reinforcing bar upward. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention provides a clamping machine for clamping a reinforcing bar substantially horizontally, a reinforcing bar bending machine for bending a reinforcing bar clamped by the clamping machine, and a first for controlling the operation of the reinforcing bar bending machine. A control unit, and the clamp machine and the reinforcing bar bending machine are provided on a base so as to be relatively movable along the longitudinal direction of the reinforcing bar clamped by the clamping machine, and the reinforcing bar bending machine Comprises a fulcrum roller, a force point roller capable of driving and rotating the outer peripheral side of the fulcrum roller around a rotation axis that is substantially concentric with the axis of the fulcrum roller, and the rotation axis in a substantially horizontal direction. And a reaction force receiving member that can receive a bending reaction force generated when the reinforcing bar is bent, and the reinforcing bar clamped by the clamping machine is connected to the fulcrum roller and the force point. With Laura Reinforcing bar bending device configured to bend along the outer periphery of the fulcrum roller while receiving the bending reaction force by the reaction force receiving member by driving and turning the power point roller About.

The above reinforcing bar bending apparatus is provided with a clamp machine and a reinforcing bar bending machine on a base so as to be relatively movable along the longitudinal direction of the reinforcing bar clamped by the clamping machine, and a desired location of the reinforcing bar clamped by the clamping machine. Is configured to be bendable.
The reinforcing bar bending machine is provided with a fulcrum roller and a force point roller that is capable of driving and rotating the outer peripheral side of the fulcrum roller around a rotation axis that is substantially concentric with the axis of the fulcrum roller. By inserting the fulcrum roller between the fulcrum roller and driving the force roller, the rebar can be bent along the outer periphery of the fulcrum roller while receiving the bending reaction force with the reaction force receiving member. Reinforcement bending where the outer peripheral side of the fulcrum roller is driven and rotated around the rotation axis that is eccentric to the axis of the fulcrum roller, and the reinforcing bar is bent by the force point roller. Compared to a rebar bending machine in which the distance between the power point roller and the fulcrum roller changes as the power point roller is driven and rotated, there is an advantage that the rebar can be bent with a substantially constant curvature.
In the above-described reinforcing bar bending apparatus having such advantages, conventionally, the reinforcing bar bending is configured so that the reinforcing bar can be bent upward by inserting the reinforcing bar between the fulcrum roller and the power point roller below the fulcrum roller. Equipped with a machine (see, for example, Patent Document 1).

JP 2002-143931 A

For this reason, in the step of bending a plurality of rebars clamped by the clamping machine, when the rebar bending direction at the first bending position and the reinforcing bar bending direction at the subsequent bending position are opposite to each other, After bending the preceding part upward, release the clamp of the reinforcing bar by the clamp machine, invert the reinforcing bar around the axis, and then clamp the clamp again to bend the subsequent part upward. There is a drawback that it is difficult to improve the work efficiency.
The present invention has been made in view of the above circumstances, and in a step of bending a plurality of reinforcing bars clamped by a clamping machine, a reinforcing bar bending direction at a portion to be bent in advance and a portion to be bent subsequently. It is an object of the present invention to make it easier to improve the work efficiency even when the reinforcing bar bending directions are opposite to each other.

A first characteristic configuration of the present invention is a clamp machine for clamping a reinforcing bar substantially horizontally, a reinforcing bar bending machine for bending a reinforcing bar clamped by the clamping machine, and controlling the operation of the reinforcing bar bending machine. A first control unit for carrying out the operation, and the clamping machine and the reinforcing bar bending machine are provided on a base so as to be relatively movable along the longitudinal direction of the reinforcing bar clamped by the clamping machine. The rebar bending machine includes a fulcrum roller, and a power point roller that can rotate and drive the outer peripheral side of the fulcrum roller around a rotation axis that is substantially concentric with the axis of the fulcrum roller. Is provided along a substantially horizontal direction, and a reaction force receiving member capable of receiving a bending reaction force generated when the reinforcing bar is bent is provided, and the reinforcing bar clamped by the clamping machine is Fulcrum roller and said The reinforcing bar can be bent along the outer periphery of the fulcrum roller while receiving the bending reaction force with the reaction force receiving member by driving and turning the force point roller by interposing with the point roller. A rebar bending device
An elevating mechanism capable of driving the reinforcing bars clamped by the clamping machine relative to the reinforcing bar bending machine along a vertical elevating path is provided, and the fulcrum roller and the force roller The reinforcing bar is inserted between the fulcrum roller and the power point roller, and extends between a protruding position where the reinforcing bar can be bent and a retraction position where the reinforcing bar is pulled out between the fulcrum roller and the power point roller. And a retractable mechanism that can be driven and moved,
In the step of bending a plurality of rebars clamped by the clamp machine, the first control unit causes the rebar to enter between the fulcrum roller and the power point roller above the fulcrum roller, and The rebar bending machine is operated in a downward bending mode in which the rebar is bent downward, and the rebar is inserted between the fulcrum roller and the power roller under the fulcrum roller so that the rebar is directed upward. The operation of the elevating mechanism and the retracting mechanism can be controlled so that the rebar bending machine can be switched to a state in which the rebar bending machine is operated in the upward bending mode of bending.

[Action and effect]
An elevating mechanism capable of driving the rebars clamped by the clamp machine relative to the rebar bending machine along a vertical elevating path, a fulcrum roller and a power roller, and a rebar as a fulcrum roller and a power roller. Since there is a protruding / retracting mechanism that can move between the protruding position where the reinforcing bar can be bent and the retracted position where the reinforcing bar is pulled out from between the fulcrum roller and the power roller, In a state where the fulcrum roller and the power roller are driven and moved to the retraction position, the reinforcing bar clamped by the clamping machine is driven up and down relative to the reinforcing bar bending machine along the vertical lifting path, After the rebar is moved relative to the upper side or the lower side of the fulcrum roller, the fulcrum roller and the power roller are driven and moved to the protruding position, and the rebar can be bent downward or upward.
The first control unit bends the reinforcing bar in a state in which the reinforcing bar bending machine is operated in a downward bending mode in which the reinforcing bar is bent downward in the step of bending a plurality of reinforcing bars clamped by the clamping machine. Since the operation of the elevating mechanism and the retracting mechanism can be controlled so that the rebar bending machine can be switched to the state in which the rebar bending machine is operated in the upward bending mode, the rebar bending direction at the location to be bent in advance and the subsequent bending are provided. Even if the rebar bending direction at the location to be reversed is opposite to each other, after bending the preceding portion upward, release the clamp by the rebar clamping machine, invert the rebar around the axis, and again It is not necessary to be clamped by the clamping machine and bend the subsequent portion upward, and it is easy to improve the work efficiency.

In the second characteristic configuration of the present invention, the first control unit moves the fulcrum roller and the force roller to the retracted position when operating the rebar bending machine in the downward bending mode. The operation of the elevating mechanism is provided so as to be controllable so that the rebar rises relative to the rebar bending machine, and
The push-up member that can push up the reinforcing bar, the push-up position that can hold the push-up member between the fulcrum roller and the force roller, and the push-up position that can hold the reinforcing bar near the upper surface of the fulcrum roller, and retreat from the lifting path A push-up mechanism that can be driven and moved over the retracted position, and the push-up member is moved to the push-up position when the elevating mechanism is operated so that the rebar is raised relative to the rebar bending machine. And a second control unit for controlling the operation of the push-up mechanism so as to move to the position.

[Action and effect]
When the rebar bending machine is operated in the downward bending mode, the first control unit moves the fulcrum roller and the power roller to the retracted position, and the rebar is relative to the rebar bending machine. Since the lifting mechanism is controlled so that it can be lifted up, the reinforcing bar clamped by the clamping machine is easily bent downward by its own weight, and there is a reinforcing bar part that enters between the fulcrum roller and the power point roller. There is a possibility that the movement path from the retracted position of the fulcrum roller to the protruding position is blocked, and the fulcrum roller cannot be operated in the downward bending mode.
Therefore, a push-up member that can push up the rebar, and the push-up member so that the rebar portion that enters between the fulcrum roller and the force roller does not block the movement path from the retracted position of the fulcrum roller to the protruding position. A push-up mechanism capable of holding the rebar portion to be inserted between the fulcrum roller and the power point roller near the upper surface of the fulcrum roller and a push-up mechanism capable of driving and moving between the retraction position retracted from the lifting path. When the rebar bending machine is operated in the downward bending mode, the reinforcing member is moved near the upper surface of the fulcrum roller by moving the push-up member to the push-up position and pushing up the rebar. It can be held in.
A second control unit is provided for controlling the operation of the push-up mechanism so that the push-up member moves to the push-up position when the lift mechanism is actuated so that the rebar is raised relative to the rebar bending machine. Therefore, the push-up member can be moved to the push-up position with good timing.

According to a third feature of the present invention, a downward bending reaction force receiving member capable of receiving a bending reaction force generated when operating in the downward bending mode is provided, and an action position capable of receiving the bending reaction force above the reinforcing bar. And movably provided across the non-acting position retracted to the lateral side of the reinforcing bar,
A reaction force receiving member moving mechanism capable of driving and moving the reaction force receiving member for lower bending over the operating position and the non-operating position, and the reaction force receiving member for lower bending in a state of operating in the downward bending mode. The third control for controlling the operation of the reaction force receiving member moving mechanism so that the reaction force receiving member for lower bending moves to the non-operating position in a state where it moves to the operating position and operates in the upward bending mode. And is provided with a part.

[Action and effect]
The lower bending reaction force receiving member that can receive the bending reaction force generated when operating in the downward bending mode is retracted to the position where the bending reaction force can be received above the reinforcing bar and to the lateral side of the reinforcing bar. Since there is provided a reaction force receiving member moving mechanism capable of driving and moving the lower bending reaction force receiving member between the operating position and the non-operating position. In the state operated in the downward bending mode, the reaction force receiving member for lower bending can be driven to the operating position to receive the bending reaction force, and in the state operated in the upward bending mode, the reaction force receiving member for lower bending is inactive. It is possible to avoid the interference between the reinforcing bar portion bent upward and the reaction force receiving member for lower bending by driving to the position.
Then, the reaction force receiving member for lower bending moves to the operating position in the state operated in the downward bending mode, and the reaction force so that the reaction receiving member for lower bending moves to the non-operating position in the state operated in the upward bending mode. Since the 3rd control part which controls the action | operation of a receiving member moving mechanism is provided, the reaction force receiving member for lower bending can be moved with sufficient timing over an action position and a non-action position.

  According to a fourth characteristic configuration of the present invention, the elevating mechanism is configured so that the clamp machine can be driven up and down with respect to the base, and the rebar clamped by the clamp machine can be driven up and down. There is a point.

[Action and effect]
The elevating mechanism is configured so that the clamp machine can be driven up and down with respect to the base and the rebar clamped by the clamp machine can be driven up and down, so the rebar bending machine on both sides sandwiching the clamp machine When the middle part of the reinforcing bar is clamped with a clamping machine and each end of the reinforcing bar is bent with a separate reinforcing bar bending machine, the reinforcing bar is moved to each reinforcing bar bending machine with one lifting mechanism. Can be driven up and down.
Therefore, it is possible to move the reinforcing bar up and down relatively with respect to each reinforcing bar bending machine with less power and with a simple structure compared to moving up and down each reinforcing bar bending machine.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 shows a reinforcing bar bending apparatus according to the present invention used to bend a reinforcing bar such as a different diameter steel bar for reinforced concrete into a predetermined shape, and a clamping machine B for clamping a reinforcing bar a along a substantially horizontal direction. And two reinforcing bar bending machines A for bending both sides of the reinforcing bar a clamped by the clamping machine B are mounted on the horizontally long base 1, and the operation of the reinforcing bar bending apparatus is controlled. A control device C is provided.

  The clamp machine B is provided at a substantially central position of the base 1, and guide rails 2 are fixed to both sides of the base 1 sandwiching the clamp machine B, and a cart 3 that can be driven and driven along each guide rail 2 is provided. Each of the reinforcing bar bending machines A is mounted on each carriage 3 so as to be movable with respect to the clamping machine B along the longitudinal direction of the reinforcing bar a clamped to the clamping machine B.

  Each of the rebar bending machines A has the same configuration although there is a difference between right and left, and as shown in FIGS. 2 to 6, the fulcrum roller 4 and the rotation axis concentric with the axis X of the fulcrum roller 4. A force point roller 5 capable of driving and rotating on the outer peripheral side of the fulcrum roller 4 around the core is provided with the rotation axis X in a substantially horizontal direction and in a direction perpendicular to the reinforcing bar a.

  3, 4, and 6, each of the reinforcing bar bending machines A is supported on the carriage 3 so as to be movable in the direction along the rotation axis X along the guide member 7, and the reinforcing bar bending machine As shown in FIGS. 3 (a) and 3 (b), a first pneumatic cylinder 8a for driving and moving the entirety of A along the guide member 7 is attached to the carriage 3, and the first pneumatic cylinder 8a is expanded and contracted, as shown in FIGS. As shown in FIGS. 4 (a) and 4 (b), the roller 4 and the power roller 5 are inserted into the rebar a between the fulcrum roller 4 and the power roller 5 and the rebar a can be bent. In addition, an exit / retreat mechanism 9 is provided which can be driven and moved over a retraction position where the reinforcing bar a is pulled out from between the fulcrum roller 4 and the force point roller 5.

  Then, as shown in FIG. 5, one or a plurality of reinforcing bars a clamped by the clamping machine B are inserted between the fulcrum roller 4 and the power roller 5, and the power roller 5 is driven by an electric motor (not shown). The rebar a is bent along the outer periphery of the fulcrum roller 4 while receiving the bending reaction force generated when the rebar a is bent by the reaction force receiving members 10a and 10b. .

  As the reaction force receiving members 10a and 10b, as shown in FIG. 5 (a), the reinforcing bar a is inserted above the fulcrum roller 4 and between the fulcrum roller 4 and the power point roller 5 at the standby position for lower bending. 5b, the downward bending reaction force receiving member 10a capable of receiving the bending reaction force when the reinforcing bar a is bent downward, and the reinforcing bar a below the fulcrum roller 4 as shown in FIG. An upper bending reaction force receiving member 10b that can be received between the fulcrum roller 4 and the force point roller 5 at the upper bending standby position to receive the bending reaction force when the reinforcing bar a is bent upward. It is provided separately.

  The upper bending reaction force receiving member 10b is fixed to the carriage 3, and the lower bending reaction force receiving member 10a has a bending reaction force above the lower bending rebar a as shown in FIG. As shown in FIG. 3 (b), the movable position can be swung around the longitudinal axis Y1 over the non-acting position where it is retracted to the lateral side of the reinforcing bar a. A second pneumatic cylinder 8b that drives and swings the lower bending reaction force receiving member 10a is attached to the carriage 3, and the lower bending reaction force receiving member 10a is moved to a non-acting position by the expansion and contraction operation of the second pneumatic cylinder 8b. A reaction force receiving member moving mechanism 11 that can be driven and moved over the position is provided.

  Further, as shown in FIG. 6, an arm-like push-up member 12 capable of pushing up the reinforcing bar a clamped by the clamping machine B is supported on the carriage 3 so as to be swingable around the horizontal axis X1 along the longitudinal direction of the reinforcing bar. At the same time, a third pneumatic cylinder 8c that can swing up and down the push-up member 12 is provided. As shown in FIG. 6 (a), the fulcrum roller 4 and the power point roller can be expanded and contracted by the third pneumatic cylinder 8c. A push-up position where the rebar portion to be inserted between the rebar 5 can be held near the upper surface of the fulcrum roller 4, and a retreat position where the rebar is retracted downward from the lifting path of the rebar a as shown in FIG. A push-up mechanism 13 capable of driving and moving the push-up member 12 is provided.

  As shown in FIGS. 2 and 4, the end of the reinforcing bar a supplied to the clamping machine B is attached to one of the carts 3 on which the reinforcing bar bending machines A are mounted. Thus, a positioning mechanism 14 for positioning the clamp position of the reinforcing bar a by the clamping machine B is provided.

  The positioning mechanism 14 is slidably movable along a guide bar 15 fixed to the carriage 3 and is in contact with a base plate 16 that can be fixed in position relative to the guide bar 15. A fourth pneumatic cylinder 8d for driving and swinging the contact plate 17 is provided through the arm 18 so as to be swingable about the vertical axis Y2 via the arm 18, and the fourth pneumatic cylinder 8d is expanded and contracted. In operation, as shown in FIG. 4 (b), the position where the end of the reinforcing bar a can be contacted, and as shown in FIG. The contact plate 17 is provided so as to be able to drive and move over the retracted position.

  As shown in FIG. 7, the clamping machine B includes a fixed clamping member 21 capable of clamping a reinforcing bar a from the vertical direction to a base 20 that is movable up and down along a guide bar 19 standing on the base 1. A movable clamping member 22 is provided.

  The fixed clamping member 21 is fixed to the base 20, and the movable clamping member 22 is movable up and down along the guide rod 19 with respect to the base 20 by the expansion and contraction operation of the fifth pneumatic cylinder 8e, and the sixth air pressure. The cylinder 8f can be extended and retracted in a direction perpendicular to the reinforcing bar a.

  When the rebar a is not clamped by the expansion / contraction operation of the fifth pneumatic cylinder 8e and the sixth pneumatic cylinder 8f, the movable clamping member 22 is lifted away from the fixed clamping member 21 as shown in FIG. In addition, when the rebar a is clamped by moving it from the upper side of the fixed clamping member 21 to the standby position, the movable clamping member 22 is moved to the position of the fixed clamping member 21 as shown in FIG. After projecting upward, as shown in FIGS. 8 (B) and 8 (C), the rebar a can be clamped by moving to a clamping position that is lowered so as to be close to the fixed clamping member 21 side. It is.

  Further, when supplying the reinforcing bar a to the clamping machine B, a guide member 24 for guiding the reinforcing bar a to be placed on the clamping surface 23 of the fixed clamping member 21 is attached to the base 20, and this guide member 24 7, the guide surface 25 has a horizontal axis Y2 around a guide position where the guide surface 25 is close to the clamping surface 23 and a non-guide position where the guide surface 25 is separated from the clamping surface 23 as shown in FIG. And an urging member (coil spring) 26 for urging elastically so as to move to the guide position.

  The guide member 24 is connected to a pin with a retracting member 30 that moves in and out in a substantially horizontal direction along the guide hole 29 on the base 20 side in association with the swing of the guide member 24. A contact member 31 that contacts 30 is fixed to a guide cylinder 32 that is movable up and down along the guide rod 19 by the expansion and contraction of the fifth pneumatic cylinder 8e.

  As shown in FIG. 7, when the reinforcing bar a is supplied to the clamping machine B with the movable clamping member 22 moved to the standby position, the distal end surface of the retracting member 30 is urged by the urging force of the coil spring 26. In a state where the contact member 31 is in contact with the contact member 31, the guide member 24 is moved to the guide position, and the reinforcing bar a is transferred to the holding surface 23 along the guide surface 25.

  When clamping the reinforcing bar a placed on the clamping surface 23, as shown in FIG. 8 (a), the movable clamping member 22 moving to the standby position is projected and moved above the fixed clamping member 21. At the same time, the movable clamping member 22 swings the guide member 24 against the urging force, and the distal end surface of the retracting member 30 is separated from the contact member 31, as shown in FIG. As the movable clamping member 22 is lowered so as to be close to the fixed clamping member 21 side by the contraction operation of the fifth pneumatic cylinder 8e, the guide member 24 is further swung against the urging force so as to be non-guided. After the forced movement to the position, as shown in the phantom line in FIG. 8 (b) and FIG. 8 (c), the movable clamping member 22 is retracted by the extension operation of the sixth pneumatic cylinder 8f. By the member 22 and the fixed clamping member 21 Muscle a is stably clamped.

  Since the movable clamping member 22 clamps the reinforcing bar a by the contraction operation of the fifth pneumatic cylinder 8e using air as a compressive fluid as a working fluid, the reaction force when the reinforcing bar bending machine A bends the reinforcing bar a downward is generated. When acting on the movable clamping member 22, the fifth pneumatic cylinder 8e may be forcibly extended and the rebar clamp may be released. However, as shown in FIG. As the reinforcing bar a is clamped, the contact member 31 descends to the base 20 side and is movable by the extension operation of the sixth pneumatic cylinder 8f as shown in the phantom line in FIG. 8 (b) and FIG. 8 (c). As the holding member 22 is retracted, the retracting member 30 protrudes toward the guide tube 32 and engages with the upper portion of the contact member 31, so that the reaction force when the reinforcing bar a is bent downward is movable movable member 22. Even if acting on the fifth air pressure It is possible to prevent a forced stretching Linda 8e, can stably clamp the reinforcing bar a.

  Also, a seventh pneumatic cylinder 8g for moving the base 20 up and down with respect to the base 1 is provided, and the clamp machine B is driven up and down with respect to the base 1 by the expansion and contraction operation of the seventh pneumatic cylinder 8g. Thus, as shown in FIG. 8 (b), the lower position for the upper bending, as shown in FIG. As shown in FIG. 8C, an elevating mechanism 27 that can be driven up and down is provided at the ascending position for downward bending.

  The controller C rebar bending machines A and clamping machines B so that the reinforcing bars a are bent on the basis of previously input processing data such as the length, bending position, and bending angle of the reinforcing bars a. , Controls the operation of the reaction force receiving member moving mechanism 11, the push-up mechanism 13, the positioning mechanism 14, the lifting mechanism 27, and the like. A first control unit C1 for controlling the operation, a second control unit C2 for controlling the operation of the push-up mechanism 13, and a third control unit C3 for controlling the operation of the reaction force receiving member moving mechanism 11. Is provided.

Hereinafter, as shown in FIG. 9, the case where the reinforcing bar a is bent into a bilaterally symmetrical shape in which the central portion is bent in a U-shape and both end portions are further bent in opposite directions is illustrated. The control operation by the control device C will be described with reference to FIGS.
10 to 12, it is shown that the black fulcrum roller 4 and the power point roller 5 have moved to the retracted position, and the white fulcrum roller 4 and the power point roller 5 have moved to the protruding position. Is shown.

  Before the operation of the reinforcing bar bending apparatus, as shown in FIG. 10 (a), each reinforcing bar bending machine A and the reaction force receiving member moving mechanism 11 are in a state in which each reinforcing bar bending machine A is adjacent to and adjacent to the clamping machine B. The push-up mechanism 13, the clamp machine B, the positioning mechanism 14, and the lifting mechanism 27 are on standby in the initial state.

  That is, in the initial state, as shown in FIG. 4A, each rebar bending machine A has the fulcrum roller 4 and the power point roller 5 moved to the retracted position, and the reaction force receiving member moving mechanism 11 The downward bending reaction force receiving member 10a has moved to the non-operating position, and the push-up mechanism 13 has moved the push-up member 12 to the retracted position as shown in FIG.

  Further, as shown in FIG. 7, the clamping machine B stands by in the initial state in which the movable clamping member 22 has moved to the standby position, and the lifting mechanism 27 has the base 20 up as shown in FIG. As shown in FIG. 4 (a), the positioning mechanism 14 stands by in the initial state where the contact plate 17 is moved to the retracted position. ing.

  Then, when an operation start command is input to the control device C by the foot switch 28, the positioning mechanism is arranged so that the end of the reinforcing bar a supplied to the clamping machine B is positioned at a predetermined position by contact with the contact plate 17. As shown in FIG. 10 (b), one carriage 3 (3a) provided with 14 is driven to stop and stops at the position determined based on the machining data, and the contact plate 17 is moved to the positioning position. Move.

  Next, as shown in FIGS. 7 and 10 (C), the rebar a is bent upward and the rebar bending machine A is bent upward so that the end of the rebar a contacts the contact plate 17. By placing the reaction force receiving member 10b over and inputting an operation start command again by the foot switch 28, the contact plate 17 is moved to the retracted position as shown in FIG. After the movable clamping member 22 is moved to the clamping position to clamp the reinforcing bar a, each carriage 3 is caused to travel so that each bending machine A can bend down a predetermined bending portion of the reinforcing bar a downward. Move it to the correct position.

  Next, the operation of the elevating mechanism 27 and the withdrawing / retracting mechanism 9 is controlled so that the reinforcing bar a is inserted between the fulcrum roller 4 and the power point roller 5 at the lower bending standby position above the fulcrum roller 4. Each reinforcing bar bending machine A is operated in a downward bending mode in which the reinforcing bar a is bent downward.

  Specifically, as shown in FIG. 11E, after the power point roller 5 is moved to the lower bending standby position, the clamping machine B is moved to the raised position together with the reinforcing bar a, and the push-up member 12 is moved to the pushed-up position. As shown in FIG. 11 (f), the fulcrum roller 4 and the force point roller 5 are moved to the projecting position, and the reinforcing bar a is positioned above the fulcrum roller 4 between the fulcrum roller 4 and the force point roller 5. Get in.

  Next, the downward bending reaction force receiving member 10a is moved to the operating position, and the force roller 5 is driven to rotate downward, and the left and right sides of the reinforcing bar a are bent downward as shown in FIG. Then, as shown in FIG. 11 (h), the push-up member 12 is moved to the retracted position, the lower bending reaction force receiving member 10a is moved to the non-acting position, and the fulcrum roller 4 and the force roller 5 are moved. Move to retirement position.

  Next, each reinforcing bar bending machine A is operated in an upward bending mode in which the reinforcing bar a is inserted between the supporting point roller 4 and the power point roller 5 below the supporting point roller 4 and the reinforcing bar a is bent upward.

  Specifically, as shown in FIG. 12 (i), the clamping machine B is moved to the lowered position, and the reinforcing bar a is placed on the upper bending reaction force receiving member 10b of each reinforcing bar bending machine A. (N), after moving each rebar bending machine A to the upper bending position, the power roller 5 is moved to the upper bending standby position, and as shown in FIG. 4 and the power roller 5 are moved to the projecting position so that the reinforcing bar a is inserted between the fulcrum roller 4 and the power roller 5 below the fulcrum roller 4 and then the power roller 5 is driven to rotate upward. Then, as shown in FIG. 12 (W), the reinforcing bar a is bent upward.

  When each reinforcing bar bending machine A is moved from the position shown in FIG. 12 (R) toward the clamping machine B side, the diameter of the reinforcing bar a is small (the bending rigidity of the reinforcing bar a is small) or the moving distance is long. When it is long, the reinforcing bar portion 33 of the reinforcing bar a on the end side of the upper bending reaction force receiving member 10b is greatly bent by its own weight, and as shown in FIG. Even if the fulcrum roller 4 and the power roller 5 are moved to the protruding position as shown in FIG. There is a possibility that it will not enter between the power point roller 5 and

  For this reason, from the position where each reinforcing bar bending machine A shown in FIG. 12 (R) starts moving toward the clamping machine B, the diameter of the reinforcing bar a and the planned moving distance (for example, the reinforcing bar a having a diameter of 10 mm or 13 mm). When each rebar bending machine A moves to the clamping machine B side by a small preset distance (for example, 180 mm) according to the movement distance of 1 m or more), the fulcrum roller 4 and the power roller 5 is moved to the protruding position, and the reinforcing bar a is inserted between the fulcrum roller 4 and the power point roller 5, as shown in FIG. It is comprised so that it may move to the position for use or under bending.

  Thereafter, the fulcrum roller 4 and the force roller 5 are moved to the retraction position, and the movable clamping member 22 is moved to the non-clamping position so that the processed reinforcing bar a can be taken out and the next reinforcing bar a can be processed. As shown in FIG. 10 (b), each rebar bending machine A is stopped at a position determined based on the machining data, and the contact plate 17 is moved to the positioning position and operated in the same manner as described above.

[Other Embodiments]
1. The reinforcing bar bending apparatus according to the present invention may include only a single reinforcing bar bending machine.
2. The rebar bending apparatus according to the present invention includes a lifting mechanism that can lift and lower the rebar bending machine relative to the rebar bending machine along a vertical lifting path by moving the rebar bending machine up and down. It may be provided.
3. The reinforcing bar bending device according to the present invention may be provided with a retracting mechanism capable of driving and moving the fulcrum roller and the power point roller with respect to the reinforcing bar bending machine main body over the protruding position and the retracted position.

Schematic front view of rebar bending device Front view of rebar bending machine Top view of rebar bending machine Top view of rebar bending machine Reinforcing bar bending machine illustration Side view of rebar bending machine Side view of the clamping machine Top view of the clamp machine Reinforcing bar plan view Illustration of rebar bending Illustration of rebar bending Illustration of rebar bending

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Base 4 Supporting roller 5 Force point roller 9 Retracting mechanism 10a Reaction force receiving member (Reaction force receiving member for downward bending)
10b Reaction force receiving member 11 Reaction force receiving member moving mechanism 12 Pushing member 13 Pushing mechanism 27 Lifting mechanism A Reinforcing bar bending machine a Reinforcing bar B Clamping machine C1 1st control part C2 2nd control part C3 3rd control part

Claims (4)

A clamping machine for clamping the reinforcing bar substantially horizontally, a reinforcing bar bending machine for bending the reinforcing bar clamped by the clamping machine, and a first control unit for controlling the operation of the reinforcing bar bending machine. As well as
The clamp machine and the reinforcing bar bending machine are provided on the base so as to be relatively movable along the longitudinal direction of the reinforcing bar clamped by the clamping machine,
The rebar bending machine includes a fulcrum roller, a force point roller that can rotate and drive the outer periphery of the fulcrum roller around a rotation axis that is substantially concentric with the axis of the fulcrum roller, and the rotation axis. A reaction force receiving member is provided along the substantially horizontal direction and capable of receiving a bending reaction force generated when the reinforcing bar is bent.
The rebar clamped by the clamping machine is inserted between the fulcrum roller and the force roller, and the force roller is driven and rotated, thereby receiving the bending reaction force with the reaction force receiving member. A rebar bending device configured to bend a rebar along the outer periphery of the fulcrum roller,
An elevating mechanism capable of driving the reinforcing bars clamped by the clamping machine relative to the reinforcing bar bending machine along a vertical elevating path is provided.
The fulcrum roller and the power point roller are inserted between the fulcrum roller and the power point roller by inserting the reinforcing bar between the fulcrum roller and the power point roller, and the rebar is bent between the fulcrum roller and the power point roller. An exit / retreat mechanism is provided that can be driven and moved across the retraction position that has slipped out of the space,
The first controller is
In the step of bending a plurality of rebars clamped by the clamping machine,
A state in which the reinforcing bar bending machine is operated in a downward bending mode in which the reinforcing bar is inserted between the supporting point roller and the power point roller on the upper side of the supporting point roller and the reinforcing bar is bent downward; It is possible to switch between a state in which the reinforcing bar bending machine is operated in an upward bending mode in which the reinforcing bar is inserted between the fulcrum roller and the power point roller below the roller and the reinforcing bar is bent upward. A rebar bending device that can control the operation of the retracting mechanism. The first controller is
When operating the rebar bending machine in the downward bending mode, the rebar rises relative to the rebar bending machine in a state where the fulcrum roller and the power roller are moved to the retracted position. Is provided so that the operation of the lifting mechanism can be controlled,
A push-up member capable of pushing up the rebar;
The push-up member is driven between a push-up position where a reinforcing bar portion for allowing the push-up member to enter between the fulcrum roller and the force roller can be held near the upper surface of the fulcrum roller, and a retraction position where the retraction path is retracted. A movable push-up mechanism;
A second control unit that controls the operation of the push-up mechanism so that the push-up member moves to the push-up position when the lift mechanism is operated so that the rebar is raised relative to the rebar bending machine. The reinforcing bar bending apparatus according to claim 1. A downward bending reaction force receiving member capable of receiving a bending reaction force generated during operation in the downward bending mode is provided at an action position capable of receiving the bending reaction force above the reinforcing bar and on a lateral side of the reinforcing bar. It is provided so as to be movable over the retired non-operating position,
A reaction force receiving member moving mechanism capable of driving and moving the reaction force receiving member for lower bending over the action position and the non-action position;
In the state operated in the downward bending mode, the reaction force receiving member for lower bending moves to the operating position, and in the state operated in the upward bending mode, the reaction force receiving member for lower bending moves to the non-operating position. The rebar bending apparatus according to claim 1, further comprising a third control unit that controls the operation of the reaction force receiving member moving mechanism.   The said raising / lowering mechanism provides the said clamp machine so that a drive movement is possible up and down with respect to the said base, It has comprised the reinforcing bar clamped by the clamp machine so that a drive raising / lowering is possible. The reinforcing bar bending apparatus according to item 1.

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