Binding system and binding machine

Abstract

To provide a binding system capable of preventing regenerative current from flowing from a binding machine to a power supply unit.SOLUTION: A binding system 100 comprises a steel bar binding machine 1A that binds steel bars, a power supply unit 200 that supplies electricity to the steel bar binding machine 1A, and a reverse current prevention unit 300 that prevents regenerative current from flowing from the steel bar binding machine 1A to the power supply unit 200. The steel bar binding machine 1A comprises a motor 110 driven by electricity supplied from the power supply unit 200, and a drive unit 111 capable of performing at least reverse braking, which switches the positive and negative current flowing to the motor 110 and applies a current that reverses a direction of rotation of the motor 110.SELECTED DRAWING: Figure 1A

Description

Technical Field

[0001] The present invention relates to a binding system and a binding machine equipped with a binding machine for binding binding objects such as reinforcing bars with a wire.

Background Art

[0002] Reinforcing bars are used in concrete structures to improve strength, and are bound with wires so that the reinforcing bars do not shift from their predetermined positions during concrete placement.

[0003] Conventionally, a binding machine has been proposed in which a wire is wound around two or more reinforcing bars, and the wire wound around the reinforcing bars is twisted to bind the two or more reinforcing bars with the wire.

[0004] A technique applying such a binding machine to a manufacturing apparatus for a reinforcing bar mesh has been proposed (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] In a configuration in which a binding machine that is used by hand is used in a manufacturing apparatus for a reinforcing bar mesh, conventionally, electricity has been supplied to the binding machine from a battery attached to the binding machine.

[0007] On the other hand, a configuration has been proposed in which a power supply unit is provided in the manufacturing apparatus for a reinforcing bar mesh, a battery is not attached to the binding machine, and electricity is supplied from a power supply unit outside the binding machine.

[0008] In the tying machine, as braking control for stopping the rotation of the motor, a reverse brake that switches the positive and negative of the current flowing through the motor and flows a current that reverses the rotation direction of the motor is used. When the reverse brake is executed, a regenerative current is generated although it is for a short time. When driven by a battery attached to the tying machine, the battery can absorb the generated regenerative current. However, a constant voltage power supply generally used as an external power supply unit does not have a protection function for regenerative current such as absorbing the regenerative current, and it is not preferable for the regenerative current to flow through the power supply unit. If the regenerative current flows through the power supply unit, there is a risk of causing problems such as the voltage supplied by the power supply unit becoming unstable or the power supply unit deteriorating due to an electrical load being applied to the power supply unit.

[0009] An object of the present disclosure is to provide a tying system capable of preventing a regenerative current from flowing from a tying machine to a power supply unit, and a tying machine capable of preventing a regenerative current from flowing to the power supply unit.

Means for Solving the Problems

[0010] To solve the above-described problems, the present disclosure provides a tying system including a tying machine that ties an object to be tied, a power supply unit that supplies electricity to the tying machine, and a backflow prevention unit that prevents a regenerative current from flowing from the tying machine to the power supply unit. The tying machine includes a motor driven by electricity supplied from the power supply unit, and a drive unit capable of at least executing a reverse brake that switches the positive and negative of the current flowing through the motor and flows a current that reverses the rotation direction of the motor.

[0011] Further, the present disclosure provides a tying machine including a motor driven by electricity supplied from a power supply unit, a drive unit capable of at least executing a reverse brake that switches the positive and negative of the current flowing through the motor and flows a current that reverses the rotation direction of the motor, and a backflow prevention unit that prevents a regenerative current from flowing to the power supply unit.

[0012] In the present disclosure, the backflow prevention unit suppresses the regenerative current generated by executing the reverse brake in the tying machine from flowing to the power supply unit.

Effects of the Invention

[0013] In the present disclosure, since the regenerative current generated by executing the reverse brake in the tying machine can be suppressed from flowing into the power supply unit, the power supply unit can be protected.

Brief Description of the Drawings

[0014]

Figure 1A

Figure 1B

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6A

Figure 6B

Figure 7A

Figure 7B

Embodiments for Carrying Out the Invention

[0015] Hereinafter, with reference to the drawings, embodiments of the tying system of the present invention and embodiments of the steel bar tying machine as the tying machine of the present invention will be described.

[0016] <Configuration Example of the Tying System of the Present Embodiment> FIG. 1A and FIG. 1B are functional block diagrams showing an example of the tying system of the present embodiment, and FIG. 2 is a configuration diagram showing an example of the tying system of the present embodiment. Further, FIG. 3 is a functional block diagram showing an example of the backflow prevention unit.

[0017] As shown in FIG. 1A, the tying system 100 includes a reinforcing bar tying machine 1A that ties the reinforcing bars S that are the objects to be tied, a power supply unit 200 that supplies electricity to the reinforcing bar tying machine 1A and the like, and a backflow prevention unit 300 that prevents the backflow of current from the reinforcing bar tying machine 1A to the power supply unit 200. The reinforcing bar tying machine 1A includes a motor 110 driven by electricity, and a drive unit 111 that drives the motor 110 with the electricity supplied from the power supply unit 200 and that can at least execute a reverse brake that switches the positive and negative of the current flowing through the motor 110 to flow a current that reverses the rotation direction of the motor 110. By including the backflow prevention unit 300, the tying system 100 can suppress the regenerative current generated when the reverse brake is executed by the reinforcing bar tying machine 1A from flowing into the power supply unit 200. Thereby, the power supply unit 200 can be protected.

[0018] As shown in FIGS. 1B and 2, the tying system 100 may include a reinforcing bar arrangement unit 150 where the reinforcing bars S are arranged. Further, the tying system 100 may include a moving unit 160 that moves the reinforcing bar tying machine 1A. Furthermore, the tying system 100 may include a main control unit 170 that controls the reinforcing bar tying machine 1A and the moving unit 160. Note that in FIGS. 1 and 2, an example where there is one reinforcing bar tying machine 1A is described, but the tying system 100 may include a plurality of reinforcing bar tying machines 1A. In this case, a single power supply unit 200 may supply electricity to the plurality of reinforcing bar tying machines 1A.

[0019] The steel bar bundling machine 1A may include a control unit 112 that executes rotation control for rotating the motor 110, braking control for stopping the rotation of the motor 110, etc., based on a control signal input from the main control unit 170, the load applied to the motor 110, a program, and the like. Further, the steel bar bundling machine 1A may include an external signal connection unit 113 to which the main control unit 170 is communicably connected and from which a control signal and the like are input. Furthermore, the steel bar bundling machine 1A may include a power control unit 114 that controls the supply of electricity to the control unit 112, the drive unit 111, and the like. Also, the steel bar bundling machine 1A may include a power connection unit 115 to which the power supply unit 200 is connected.

[0020] In the steel bar arrangement section 150, a plurality of steel bars S are arranged in a lattice pattern. At each intersection of the lattice, the steel bars S are in a bundling position.

[0021] The moving section 160 includes a support section 161, a mounting section 162 of the steel bar bundling machine 1A, at least one arm section 163, and joint sections 164 that connect the support section 161 and the arm section 163, the arm section 163 and the mounting section 162, and the like.

[0022] The joint section 164 has a single-axis or multi-axis (two or more axes) rotation shaft. The joint section 164 is driven by a motor (not shown) to change the orientation of the arm section 163 with respect to the support section 161, the orientation of one arm section 163 with respect to the other arm section 163 connected by the joint section 164, the orientation of the mounting section 162 with respect to the arm section 163, and the like.

[0023] In the moving section 160, the support section 161 is fixedly or movably supported by the frame 165. The steel bar arrangement section 150 is, for example, fixedly or movably supported by the frame 165.

[0024] As a result, the moving section 160 can move the steel bar bundling machine 1A in a direction along the arrangement plane of the steel bars S arranged in the steel bar arrangement section 150, and can also move it in a direction approaching and away from the arrangement plane.

[0025] The main control unit 170 outputs a control signal for controlling the moving unit 160 based on a predetermined program, and moves the rebar tying machine 1A to an arbitrary tying position P1. Further, the main control unit 170 outputs a control signal for controlling the rebar tying machine 1A based on a predetermined program, and ties the rebar S with the rebar tying machine 1A.

[0026] The power supply unit 200 is, for example, a switching power supply capable of supplying electricity at a constant voltage.

[0027] In the rebar tying machine 1A, to stop the rotation of the motor 110, for example, there is a method of stopping the supply of electricity to the motor 110. In this case, since the motor 110 rotates due to inertia, it takes time until the rotation stops.

[0028] On the other hand, there is known a braking control in which the positive and negative of the current flowing through the motor 110 are switched, and a current for reversing the rotation direction of the motor 110 is passed for a predetermined time to stop the rotation of the motor 110. Such braking control is called reverse braking. Also, there is a braking control in which the electrodes of the motor 120 are short-circuited. Such braking control is called short braking.

[0029] However, when the reverse braking is executed, a regenerative current is generated. When the voltage of the regenerative current output from the motor 110 becomes higher than the voltage of the current supplied from the power supply unit 200 to the motor 110, the regenerative current flows into the power supply unit 200.

[0030] Therefore, a reverse current prevention unit 300 is provided. The reverse current prevention unit 300 includes a diode 301 that allows current to flow from the power supply unit 200 to the rebar tying machine 1A and blocks the regenerative current from the rebar tying machine 1A to the power supply unit 200. Further, the reverse current prevention unit 300 includes a resistor 302 and a capacitor 303 that consume the regenerative current.

[0031] As a result, the regenerative current generated when the reverse brake is executed is suppressed from flowing into the power supply unit 200, and the power supply unit 200 is protected. Further, the regenerative current is consumed by the time constants of the resistor 302 and the capacitor 303, and the jump of the voltage applied to the rebar tying machine 1A can be suppressed.

[0032] FIG. 4 is an internal configuration diagram viewed from the side showing an example of the overall configuration of the rebar tying machine, and FIG. 5 is an internal configuration diagram viewed from the front showing an example of the wire feeding unit.

[0033] The rebar tying machine 1A feeds the wire W in the positive direction indicated by the arrow F, winds it around the rebar S which is the tying object, sends the wire W wound around the rebar S in the reverse direction indicated by the arrow R and winds it around the rebar S, then twists the wire W to tie the rebar S with the wire W. The rebar tying machine 1A ties the rebar S with one wire W. Further, the rebar tying machine 1A may tie the rebar S with a plurality of wires W, in this example, two wires W. In the following example, the configuration of tying the rebar S with two wires W will be described.

[0034] In order to realize the above-described functions, the rebar tying machine 1A includes a magazine 2 that houses the wire W, a wire feeding unit 3 that feeds two wires W side by side in the radial direction of the wire W, and a wire guide 4 that guides the two wires W sent to the wire feeding unit 3. Further, the rebar tying machine 1A includes a curl forming unit 5 that forms an annular feeding path for winding the two wires W sent by the wire feeding unit 3 around the rebar S, and a cutting unit 6 that cuts the two wires W wound around the rebar S. Furthermore, the rebar tying machine 1A includes a tying unit 7 that twists the two wires W wound around the rebar S, and a driving unit 8 that drives the tying unit 7.

[0035] The magazine 2 rotatably and removably houses a reel 20 around which a long wire W is wound so as to be payed out. The wire W is a wire made of a metal wire that can be plastically deformed, a wire in which the metal wire is coated with resin, or a stranded wire. The reel 20 has two wires W wound thereon, and two wires W can be simultaneously drawn out from the reel 20.

[0036] The wire feeding section 3 includes a pair of feeding gears 30 (30L, 30R) that sandwich and feed two parallel wires W. The rotation operation of the feeding motor 31 is transmitted to one of the feeding gears 30L in the wire feeding section 3. Also, in the pair of feeding gears 30, the rotation operation of one feeding gear 30L is transmitted to the other feeding gear 30R due to the meshing of the gear portions.

[0037] The wire feeding section 3 arranges the two wires W in parallel along the direction in which the pair of feeding gears 30 are arranged. Also, the wire feeding section 3 switches the forward and reverse directions of the rotation direction of the feeding motor 31, thereby switching the rotation direction of the feeding gears 30 and the forward and reverse directions of the feeding direction of the wire W. The feeding motor 31 is an example of the motor 110 shown in FIG. 1.

[0038] The wire guide 4 is arranged on the upstream side of the feeding gears 30 and on the downstream side (not shown) with respect to the feeding direction of the wire W fed in the forward direction. The wire guide 4 arranges the two entering wires W in parallel along the direction in which the pair of feeding gears 30 are arranged and guides them between the pair of feeding gears 30.

[0039] The curl forming section 5 includes a curl guide 50 that imparts a curl to the two wires W fed by the wire feeding section 3 and restricts the direction in which the two wires W are parallel, and a guiding guide 51 that guides the two wires W with curls imparted by the curl guide 50 to the binding section 7. The curl forming section 5 forms an annular feeding path Ru as shown by the two-dot chain line in FIG. 4 that passes from the curl guide 50 through the guiding guide 51 to reach the binding section 7 by imparting curls to the two wires W fed by the wire feeding section 3 and passing through the curl guide 50.

[0040] The cutting section 6 includes a fixed blade section 60, a movable blade section 61 that cuts the wire W in cooperation with the fixed blade section 60, and a transmission mechanism 62 that transmits the operation of the binding section 7 to the movable blade section 61. The cutting section 6 cuts the wire W by the rotational operation of the movable blade section 61 with the fixed blade section 60 as the fulcrum axis.

[0041] The end portion 7 includes a wire locking body 70 to which the wire W is locked and a sleeve 71 that actuates the wire locking body 70. The drive unit 8 includes a torsion motor 80 and a speed reducer 81 that performs speed reduction and torque amplification. The torsion motor 80 is an example of the motor 110 shown in FIG. 1.

[0042] The steel bar tying machine 1A includes a feed restricting portion 90 at the end of the feed path of the wire W that is locked by the wire locking body 70 and through which the wire W passes along the annular feed path Ru, against which the tip of the wire W abuts. Further, in the steel bar tying machine 1A, the curl guide 50 and the guide guide 51 of the curl forming portion 5 described above are provided at the front end of the main body portion 10. Furthermore, in the steel bar tying machine 1A, a butting portion 91 against which the steel bar S abuts is provided between the curl guide 50 and the guide guide 51 at the front end of the main body portion 10. The steel bar tying machine 1A includes the drive unit 111, the control unit 112, and the power control unit 114 described above inside the main body portion 10. The steel bar tying machine 1A includes the external signal connection portion 113 and the power supply connection portion 115 described above inside the rear side of the main body portion 10. Note that the positions where the drive unit 111, the control unit 112, the power control unit 114, the external signal connection portion 113, and the power supply connection portion 115 are provided are not limited to those shown in FIG. 4.

[0043] <Operation example of the steel bar system of the present embodiment> Next, with reference to the respective drawings, the operation of tying the steel bar S with the wire W by the steel bar tying machine 1A in the tying system of the present embodiment will be described.

[0044] The main control unit 170 outputs a control signal for controlling the moving unit 160 based on a predetermined program, and moves the steel bar tying machine 1A to a desired tying position P1. The moving unit 160 moves the steel bar tying machine 1A so that the steel bar S enters between the curl guide 50 and the guide guide 51. When the main control unit 170 determines that the steel bar tying machine 1A has moved to a position where the steel bar S enters between the curl guide 50 and the guide guide 51, the main control unit 170 outputs a control signal for controlling the steel bar tying machine 1A based on a predetermined program.

[0045] Based on the control signal input from the main control unit 170, the control unit 112 of the steel bar bundling machine 1A drives the feed motor 31 in the forward rotation direction, and sends the two wires W clamped by the pair of feed gears 30 in the positive direction indicated by the arrow F.

[0046] The wire W sent in the positive direction is sent to the curl guide 50 of the curl forming unit 5. By passing through the curl guide 50, the wire W is given a curl and wound around the steel bar S along the annular feed path Ru.

[0047] The wire W with a curl formed by the curl guide 50 is guided by the induction guide 51, and further sent in the positive direction by the wire feed unit 3, and thus is guided to the wire locking body 70. When the control unit 112 determines that the tip of the wire W has been sent to the position where it abuts against the feed regulating unit 90, it stops the drive of the feed motor 31.

[0048] After stopping the forward feed of the wire W, the control unit 112 drives the torsion motor 80 in the forward rotation direction. The rotation of the sleeve 71 is restricted in the operating range where the wire locking body 70 locks the wire W. Thereby, the rotation of the torsion motor 80 is converted into linear movement, and the sleeve 71 moves in the forward direction, i.e., the direction of arrow A1. When the sleeve 71 moves forward, the wire W is locked by a predetermined operation of the wire locking body 70.

[0049] When the control unit 112 determines from the rotation amount of the torsion motor 80 or the like that the sleeve 71 has advanced to the position where the wire W is locked by the wire locking body 70, it stops the rotation of the torsion motor 80 and drives the feed motor 31 in the reverse rotation direction.

[0050] As a result, the pair of feed gears 30 reverses, and the wire W clamped between the pair of feed gears 30 is sent in the reverse direction indicated by the arrow R. By the operation of sending the wire W in the reverse direction, the wire W is wound around the steel bar S.

[0051] When the control unit 112 determines that the wire W is wound around the reinforcing bar S, it stops driving the forward rotation direction of the feed motor 31, and then drives the torsion motor 80 in the forward rotation direction. When the torsion motor 80 is driven in the forward rotation direction, the sleeve 71 moves further in the forward direction indicated by the arrow A1. The movement of the sleeve 71 in the forward direction is transmitted to the cutting part 6 by the transmission mechanism 62, so that the movable blade part 61 rotates, and a predetermined position of the wire W is cut by the operations of the fixed blade part 60 and the movable blade part 61.

[0052] By driving the torsion motor 80 in the forward rotation direction to move the sleeve 71 in the forward direction indicated by the arrow A1 to cut the two wires W, almost simultaneously, the wire W is pushed forward by the wire locking body 70, and the tip side and the terminal side of the wire W are bent toward the reinforcing bar S side.

[0053] After the tip side and the terminal side of the wire W are bent toward the reinforcing bar S side, when the torsion motor 80 is further driven in the forward rotation direction, the sleeve 71 moves further in the forward direction. When the sleeve 71 moves to a predetermined position, the restriction on the rotation of the sleeve 71 is released.

[0054] As a result, when the torsion motor 80 is further driven in the forward rotation direction, the sleeve 71 rotates, and the operation of twisting the wire W locked by the wire locking body 70 is started. When it is detected that the load applied to the torsion motor 80 becomes maximum by twisting the wire W, the control unit 112 stops driving the torsion motor 80 in the forward rotation direction. Next, the control unit 112 drives the torsion motor 80 in the reverse rotation direction. When the torsion motor 80 is driven in the reverse rotation direction, the sleeve 71 moves in the direction of the arrow A2, which is the backward direction, with the rotation restricted.

[0055] When the sleeve 71 moves backward, the locking of the wire W by the wire locking body 70 is released, and the wire W binding the reinforcing bar S comes out of the wire locking body 70.

[0056] The control unit 112 performs control to stop the rotation of the torsion motor 80 and the feed motor 31, and executes the above-described reverse brake or short brake based on a predetermined pattern defined by a program. Thereby, appropriate braking control is performed. Further, the regenerative current generated by executing the reverse brake is suppressed from flowing into the power supply unit 200, and the power supply unit 200 is protected.

[0057] Note that the tying system may be provided with a reel storage unit outside the reinforcing bar tying machine 1A without including the magazine 2 in which the reel 20 is housed in the reinforcing bar tying machine 1A. In this case, a wire drawing unit that draws the wire W from the reel 20 stored in the reel storage unit may be provided separately from the wire feeding unit 3.

[0058] FIG. 6A and FIG. 6B are configuration diagrams showing other examples of the tying system according to the present embodiment. A tying system 100B shown in FIG. 6A includes a reinforcing bar tying machine 1B, a reel storage unit 22 that houses the reel 20, and a wire drawing unit 400 that draws the wire W from the reel 20 stored in the reel storage unit 22. Although not shown, the tying system 100B includes a moving unit, a reinforcing bar arranging unit, a main control unit, a power supply unit, and a backflow prevention unit shown in FIGS. 1, 2, and 3.

[0059] The reinforcing bar tying machine 1B does not include a magazine. Other configurations may be the same as those of the reinforcing bar tying machine 1A shown in FIGS. 4 and 5. The wire drawing unit 400 includes a pair of feed rollers 401 that sandwich and feed the wire W, a drawing motor 402 that drives the feed rollers 401, a transmission unit 403 that transmits the driving force of the drawing motor 402 to the feed rollers 401, and the like.

[0060] The wire drawing unit 400 draws the wire W from the reel 20 when the drawing motor 402 is driven and the feed rollers 401 rotate in a predetermined direction. The drawing motor 402 is an example of the motor 110 shown in FIG. 1.

[0061] The tying system 100C shown in FIG. 6B includes a reinforcing bar tying machine 1B, a reel housing portion 22 that houses a reel 20, and a wire drawing portion 410 that draws a wire W from the reel 20 housed in the reel housing portion 22. Although not shown, the tying system 100C includes a moving portion, a reinforcing bar arranging portion, a main control portion, a power supply portion, and a backflow prevention portion shown in FIGS. 1, 2, and 3.

[0062] The wire drawing portion 410 includes rollers 411 and 412 that constitute a conveyance path of the wire W, a drawing roller 413 that is movably supported in a direction intersecting the conveyance path of the wire W, a drawing motor 414 that moves the drawing roller 413, and a transmission portion 415 that transmits the driving force of the drawing motor 414 to the drawing roller 413.

[0063] The wire drawing portion 410 is driven by the drawing motor 414, and the drawing roller 413 moves away from the conveyance path of the wire W, so that the wire W is drawn from the reel 20. Further, the wire drawing portion 410 can create an excess portion Wa of the wire W drawn from the reel 20 by driving the drawing motor 414 and moving the drawing roller 413 in a direction approaching the conveyance path of the wire W, and this excess portion Wa can be sent by the wire feeding portion 3. The drawing motor 414 is an example of the motor 110 shown in FIG. 1.

[0064] Regarding the drawing motor 402 and the drawing motor 414 as well, the control unit 112 executes the above-described reverse brake or short brake based on a predetermined pattern defined by a program by controlling to stop the rotation of the drawing motor 402 or the drawing motor 414. Thereby, appropriate braking control is performed. Further, the regenerative current generated by executing the reverse brake is suppressed from flowing into the power supply unit 200, and the power supply unit 200 is protected.

[0065] <Configuration example of the reinforcing bar tying machine according to the present embodiment> FIGS. 7A and 7B are functional block diagrams showing an example of a tying system including the reinforcing bar tying machine according to the present embodiment.

[0066] The steel bar tying machine 1C is used in the tying system 100D. As shown in FIG. 7A, the tying system 100D includes a power supply unit 200 that supplies electricity to the steel bar tying machine 1C and the like. The steel bar tying machine 1C includes an electric motor 110 and a drive unit 111 that drives the motor 110 with the electricity supplied from the power supply unit 200 and can at least execute a reverse brake that switches the positive and negative of the current flowing through the motor 110 to reverse the rotation direction of the motor 110. Further, the steel bar tying machine 1C includes a backflow prevention unit 300 that prevents the backflow of current from the steel bar tying machine 1C to the power supply unit 200. By including the backflow prevention unit 300 in the tying system 100D, it is possible to suppress the regenerative current generated when the reverse brake is executed by the steel bar tying machine 1C from flowing into the power supply unit 200. Thereby, the power supply unit 200 can be protected.

[0067] As shown in FIG. 7B, the tying system 100D may include a moving unit 160 that moves the steel bar tying machine 1C. Further, the tying system 100D may include a main control unit 170 that controls the steel bar tying machine 1C and the moving unit 160. Furthermore, the tying system 100D may include the steel bar arranging unit shown in FIG. 2.

[0068] The steel bar tying machine 1C may include a control unit 112 that executes rotation control for rotating the motor 110, braking control for stopping the rotation of the motor 110, etc. based on a control signal input from the main control unit 170, the load applied to the motor 110, a program, etc. Further, the steel bar tying machine 1C may include an external signal connection unit 113 to which the main control unit 170 is communicably connected and a control signal etc. is input from the main control unit 170. Furthermore, the steel bar tying machine 1C may include a power control unit 114 that controls the supply of electricity to the control unit 112, the drive unit 111, etc. Also, the steel bar tying machine 1C may include a power supply connection unit 115 to which the power supply unit 200 is connected.

[0069] As described above, the bundling system 100 is configured to include the backflow prevention unit 300 separately from the steel bar bundling machine 1A. In contrast, the bundling system 100D includes the backflow prevention unit 300 as a part of the steel bar bundling machine 1C. The other configurations of the steel bar bundling machine 1A and the steel bar bundling machine 1C, and the bundling systems 100 and 100D are the same.

Explanation of Signs

[0070] 1A, 1B, 1C... steel bar bundling machines, 100, 100B, 100C, 100D... bundling systems, 110... motors, 111... drive units, 112... control units, 113... external signal connection parts, 114... power control units, 115... power supply connection parts, 150... steel bar arrangement parts, 160... moving parts, 161... support parts, 162... mounting parts, 163... arms, 164... joint parts, 165... frames, 170... main control units, 200... power supply parts, 300... backflow prevention units, 301... diodes, 302... resistors, 303... capacitors, 31... feed motors (motors), 80... torsion motors (motors), 402... extraction motors (motors), 414... extraction motors (motors), 22... reel storage parts

Claims

1. A bundling machine for bundling bundled objects, A power supply unit for supplying electricity to the bundling machine, A backflow prevention unit for preventing regenerative current from flowing from the bundling machine to the power supply unit, and The bundling machine A motor driven by electricity supplied from the power supply unit, A drive unit capable of at least executing a reverse brake that switches the positive and negative of the current flowing through the motor and flows a current that reverses the rotation direction of the motor Bundling system.

2. The backflow prevention unit includes a diode that cuts off the regenerative current from the bundling machine to the power supply unit, and a resistor and a capacitor that consume the regenerative current The bundling system according to claim 1.

3. The bundling machine A feed motor for feeding a wire for bundling bundled objects, A twisting motor for twisting the wire, and The motor includes the feed motor and / or the twisting motor The bundling system according to claim 1.

4. A reel storage unit for storing a reel around which a wire is wound, A wire extraction unit for extracting a wire from the reel stored in the reel storage unit, and The wire extraction unit includes an extraction motor for extracting the wire, The motor includes the extraction motor The bundling system according to claim 1.

5. A motor driven by electricity supplied from a power supply unit, A drive unit capable of at least executing a reverse brake that switches the positive and negative of the current flowing through the motor and flows a current that reverses the rotation direction of the motor, A backflow prevention unit for preventing regenerative current from flowing to the power supply unit Bundling machine provided with.

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