Binding system and binding machine

Abstract

A binding system 100 comprising: a reinforcing bar-binding machine 1A for binding reinforcing bars; a power supply unit 200 for supplying electricity to the reinforcing bar-binding machine 1A; and a backflow prevention unit 300 for preventing a regenerated current from flowing from the reinforcing bar-binding machine 1A to the power supply unit 200, wherein the reinforcing bar-binding machine 1A comprises a motor 110 driven by the electricity supplied from the power supply unit 200, and a drive unit 111 capable of executing at least reverse current braking in which the direction of the current flowing through the motor 110 is reversed to apply a current that reverses the rotational direction of the motor 110.

Description

Binding system and binding machine

[0001] This invention relates to a bundling system and bundling machine that are equipped with a bundling machine that uses wire to bundle objects such as reinforcing bars.

[0002] Steel bars are used in concrete structures to increase their strength, and are tied together with wire to prevent the bars from shifting from their designated positions when the concrete is poured.

[0003] BACKGROUND ART Conventionally, binding machines have been proposed that wrap wire around two or more reinforcing bars and twist the wire wrapped around the reinforcing bars to bind the two or more reinforcing bars with the wire.

[0004] A technology has been proposed in which such a binding machine is applied to a reinforcing bar mesh manufacturing device that is installed and used (see, for example, Patent Document 1).

[0005] Japanese Patent Application Publication No. 2013-35052

[0006] In a configuration in which a handheld bundling machine is used as a rebar mesh manufacturing device, electricity has conventionally been supplied to the bundling machine from a battery attached to the bundling machine.

[0007] In response to this, a configuration has been proposed in which a power supply unit is provided in the reinforcing bar mesh manufacturing device, and electricity is supplied from a power supply unit external to the binding machine without attaching a battery to the binding machine.

[0008] In binders, a reverse brake is used to stop the motor's rotation by switching the polarity of the current flowing through the motor to reverse the direction of rotation. When the reverse brake is activated, a regenerative current is generated, albeit for a short period of time. If the binder is powered by a battery attached to the binder, the battery can absorb the generated regenerative current. However, constant-voltage power supplies commonly used as external power supplies do not have protection functions against regenerative current, such as absorbing the regenerative current, and it is not desirable for regenerative current to flow in the power supply. If regenerative current flows in the power supply, it may cause problems such as unstable voltage supplied by the power supply or an electrical load being placed on the power supply, which may lead to deterioration of the power supply.

[0009] The present disclosure aims to provide a binding system that can prevent regenerative current from flowing from a binding machine to a power supply unit, and a binding machine that can prevent regenerative current from flowing to a power supply unit.

[0010] In order to solve the above-mentioned problems, the present disclosure provides a binding system comprising a binding machine for binding objects to be bound, a power supply unit for supplying electricity to the binding machine, and a backflow prevention unit for preventing regenerative current from flowing from the binding machine to the power supply unit, wherein the binding machine comprises a motor driven by electricity supplied from the power supply unit, and a drive unit capable of at least performing a reverse brake by switching the positive and negative current flowing to the motor to flow a current that reverses the direction of rotation of the motor.

[0011] The present disclosure also provides a binding machine that includes a motor driven by electricity supplied from a power supply unit, a drive unit that can at least perform a reverse brake that switches the positive and negative current flowing through the motor to flow a current that reverses the direction of rotation of the motor, and a backflow prevention unit that prevents regenerative current from flowing to the power supply unit.

[0012] In the present disclosure, the backflow prevention unit prevents the regenerative current generated by performing reverse braking in the binding machine from flowing to the power supply unit.

[0013] In the present disclosure, the regenerative current generated when reverse braking is performed in the binding machine can be prevented from flowing to the power supply unit, thereby protecting the power supply unit.

[0014] FIG. 1 is a functional block diagram showing an example of a bundling system according to the present embodiment. FIG. 2 is a functional block diagram showing an example of a bundling system according to the present embodiment. FIG. 3 is a configuration diagram showing an example of a bundling system according to the present embodiment. FIG. 4 is a functional block diagram showing an example of a backflow prevention unit. FIG. 5 is an internal configuration diagram seen from the side showing an example of the overall configuration of a reinforcing bar bundling machine. FIG. 6 is an internal configuration diagram seen from the front showing an example of a wire feeding unit. FIG. 7 is a configuration diagram showing another example of a bundling system according to the present embodiment. FIG. 8 is a configuration diagram showing another example of a bundling system according to the present embodiment. FIG. 9 is a functional block diagram showing an example of a bundling system equipped with a reinforcing bar bundling machine according to the present embodiment.

[0015] Hereinafter, an embodiment of a binding system of the present invention and an embodiment of a reinforcing bar binding machine as a binding machine of the present invention will be described with reference to the drawings.

[0016] 1A and 1B are functional block diagrams showing an example of a bundling system according to this embodiment, and Fig. 2 is a configuration diagram showing an example of a bundling system according to this embodiment. Also, Fig. 3 is a functional block diagram showing an example of a backflow prevention unit.

[0017] As shown in FIG. 1A , the bundling system 100 includes a rebar bundling machine 1A that bundles rebars S to be bundled, a power supply unit 200 that supplies electricity to the rebar bundling machine 1A, and a backflow prevention unit 300 that prevents backflow of current from the rebar bundling machine 1A to the power supply unit 200. The rebar bundling machine 1A includes an electrically driven motor 110 and a drive unit 111 that drives the motor 110 with electricity supplied from the power supply unit 200 and is capable of at least performing reverse braking, switching the polarity of the current flowing through the motor 110 to reverse the direction of rotation of the motor 110. By including the backflow prevention unit 300, the bundling system 100 can prevent regenerative current generated by the rebar bundling machine 1A performing reverse braking from flowing to the power supply unit 200, thereby protecting the power supply unit 200.

[0018] As shown in Figures 1B and 2, the bundling system 100 may include a rebar placement unit 150 where rebars S are placed. The bundling system 100 may also include a movement unit 160 that moves the rebar binding machine 1A. The bundling system 100 may also include a main control unit 170 that controls the rebar binding machine 1A and the movement unit 160. Note that although Figures 1 and 2 illustrate an example in which one rebar binding machine 1A is used, the bundling system 100 may also include multiple rebar binding machines 1A. In this case, a single power supply unit 200 may supply electricity to multiple rebar binding machines 1A.

[0019] The rebar binding machine 1A may include a control unit 112 that performs rotation control to rotate the motor 110 and braking control to stop the rotation of the motor 110, based on a control signal input from the main control unit 170, the load on the motor 110, a program, etc. The rebar binding machine 1A may also include an external signal connection unit 113 to which the main control unit 170 is communicatively connected and to which control signals, etc. are input from the main control unit 170. The rebar binding machine 1A may also include a power control unit 114 that controls the supply of electricity to the control unit 112, the drive unit 111, etc. The rebar binding machine 1A may also include a power connection unit 115 to which a power supply unit 200 is connected.

[0020] In the reinforcing bar arrangement section 150, a plurality of reinforcing bars S are arranged in a lattice pattern. The reinforcing bars S are bound at each intersection of the lattice.

[0021] The moving part 160 includes a support part 161, an attachment part 162 for the rebar binding machine 1A, at least one arm part 163, and a joint part 164 that connects the support part 161 and the arm part 163, and the arm part 163 and the attachment part 162, etc.

[0022] The joint 164 has one or more rotation axes. The joint 164 is driven by a motor (not shown) to change the orientation of the arm 163 relative to the support 161, the orientation of one arm 163 connected by the joint 164 relative to the other arm 163, the orientation of the attachment 162 relative to the arm 163, etc.

[0023] The moving unit 160 has a support unit 161 fixedly or movably supported by a frame 165. The reinforcing bar arrangement unit 150 is fixedly or movably supported by the frame 165, for example.

[0024] As a result, the moving unit 160 can move the reinforcing bar binding machine 1A in a direction along the arrangement surface of the reinforcing bar S arranged in the reinforcing bar arrangement unit 150, as well as in a direction toward and away from the arrangement surface.

[0025] The main control unit 170 outputs a control signal to control the moving unit 160 based on a predetermined program, and moves the reinforcing bar binding machine 1A to an arbitrary binding position P1. The main control unit 170 also outputs a control signal to control the reinforcing bar binding machine 1A based on a predetermined program, and binds the reinforcing bars S with the reinforcing bar binding machine 1A.

[0026] The power supply unit 200 is, for example, a switching power supply that can supply electricity at a constant voltage.

[0027] In the rebar binding machine 1A, one way to stop the rotation of the motor 110 is to stop the supply of electricity to the motor 110. In this case, since the motor 110 rotates by inertia, it takes time for the rotation to stop.

[0028] In response to this, a braking control method is known in which the polarity of the current flowing through the motor 110 is switched to positive and negative to pass a current that reverses the direction of rotation of the motor 110 for a predetermined period of time, thereby stopping the rotation of the motor 110. This type of braking control is called reverse braking. There is also a braking control method in which the electrodes of the motor 120 are short-circuited. This type of braking control is called short braking.

[0029] However, when reverse braking is performed, 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 to the power supply unit 200.

[0030] Therefore, a backflow prevention unit 300 is provided. The backflow prevention unit 300 has a diode 301 that passes current from the power supply unit 200 to the rebar binding machine 1A and blocks regenerative current from the rebar binding machine 1A to the power supply unit 200. The backflow prevention unit 300 also has a resistor 302 and a capacitor 303 that consume the regenerative current.

[0031] This prevents the regenerative current generated by reverse braking from flowing to the power supply unit 200, protecting the power supply unit 200. In addition, the regenerative current is consumed by the time constant of resistor 302 and capacitor 303, which can prevent a jump in voltage applied to the rebar binding machine 1A.

[0032] FIG. 4 is a diagram showing an example of the overall configuration of the reinforcing bar binding machine as viewed from the side, and FIG. 5 is a diagram showing an example of the internal configuration of the wire feeding section as viewed from the front.

[0033] The reinforcing bar binding machine 1A feeds the wire W in the forward direction indicated by the arrow F, winding it around the reinforcing bar S to be bound, and then feeds the wire W wound around the reinforcing bar S in the reverse direction indicated by the arrow R to wind it around the reinforcing bar S, and then twists the wire W to bind the reinforcing bar S with the wire W. The reinforcing bar binding machine 1A binds the reinforcing bar S with one wire W. The reinforcing bar binding machine 1A may also bind the reinforcing bar S with multiple wires W, two wires W in this example. In the following example, a configuration for binding the reinforcing bars S with two wires W will be described.

[0034] To achieve the above-mentioned functions, the reinforcing bar binding machine 1A includes a magazine 2 that stores the wire W, a wire feeding unit 3 that feeds two wires W aligned in the radial direction of the wire W, and a wire guide 4 that guides the two wires W fed to the wire feeding unit 3. The reinforcing bar binding machine 1A also includes a curl forming unit 5 that forms a circular feeding path that winds the two wires W fed by the wire feeding unit 3 around the reinforcing bar S, and a cutting unit 6 that cuts the two wires W wound around the reinforcing bar S. The reinforcing bar binding machine 1A also includes a binding unit 7 that twists the two wires W wound around the reinforcing bar S, and a drive unit 8 that drives the binding unit 7.

[0035] The magazine 2 rotatably and detachably stores a reel 20 around which a long wire W is wound so as to be able to be unwound. The wire W may be a wire made of a metal wire that can be plastically deformed, a metal wire coated with resin, or a twisted wire. Two wires W are wound around the reel 20, and two wires W can be pulled out from the reel 20 at the same time.

[0036] The wire feeding unit 3 includes a pair of feed gears 30 (30L, 30R) that clamp and feed two parallel wires W. In the wire feeding unit 3, the rotational motion of a feed motor 31 is transmitted to one of the feed gears 30L. In addition, the pair of feed gears 30 have their gear portions meshed together, so that the rotational motion of one of the feed gears 30L is transmitted to the other feed gear 30R.

[0037] The wire feeding unit 3 aligns the two wires W in the direction in which the pair of feed gears 30 are aligned. The wire feeding unit 3 also switches the rotation direction of the feed motor 31 between forward and reverse, thereby switching the rotation direction of the feed gears 30 and switching the forward and reverse feed direction of the wires W. The feed motor 31 is an example of the motor 110 shown in FIG. 1 .

[0038] The wire guide 4 is disposed on the upstream side and the downstream side (not shown) of the feed gear 30 with respect to the feed direction of the wire W fed in the forward direction. The wire guide 4 guides the two entering wires W between the pair of feed gears 30, aligning them in the direction in which the pair of feed gears 30 are aligned.

[0039] The curl forming unit 5 is provided with a curl guide 50 that curls the two wires W fed by the wire feeding unit 3 and regulates the parallel orientation of the two wires W, and an induction guide 51 that guides the two wires W that have been curled by the curl guide 50 to the bundling unit 7. The curl forming unit 5 curls the two wires W that are fed by the wire feeding unit 3 and pass through the curl guide 50, thereby forming a circular feed path Ru as shown by the two-dot chain line in Figure 4 that runs from the curl guide 50 through the induction guide 51 to the bundling unit 7.

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

[0041] The bundling unit 7 includes a wire locking body 70 that locks the wire W, and a sleeve 71 that operates the wire locking body 70. The driving unit 8 includes a torsion motor 80 and a reducer 81 that reduces speed and amplifies torque. The torsion motor 80 is an example of the motor 110 shown in FIG. 1.

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

[0043] <Example of Operation of Reinforcing Bar System of This Embodiment> Next, with reference to the drawings, an operation of binding reinforcing bars S with wire W by the reinforcing bar binding machine 1A in the binding system of this embodiment will be described.

[0044] The main control unit 170 outputs a control signal to control the movement unit 160 based on a predetermined program, and moves the rebar binding machine 1A to the desired binding position P1. The movement unit 160 moves the rebar binding machine 1A so that the rebar S enters between the curl guide 50 and the guiding guide 51. When the main control unit 170 determines that the rebar binding machine 1A has moved to a position where the rebar S enters between the curl guide 50 and the guiding guide 51, it outputs a control signal to control the rebar binding 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 rebar binding machine 1A drives the feed motor 31 in the forward rotation direction, and feeds the two wires W clamped between a pair of feed gears 30 in the forward direction indicated by the arrow F.

[0046] The wire W fed in the forward direction is fed 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 that causes it to be wound around the reinforcing bar S along the circular feed path Ru.

[0047] The wire W having been curled by the curl guide 50 is guided by the induction guide 51 and further fed in the forward direction by the wire feed unit 3, thereby being guided to the wire retainer 70. When the control unit 112 determines that the tip of the wire W has been fed to a position where it abuts against the feed regulating unit 90, it stops driving 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. This converts the rotation of the torsion motor 80 into linear movement, and the sleeve 71 moves forward in 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 amount of rotation of the torsion motor 80, etc., that the sleeve 71 has advanced to a 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 rotate in the reverse direction, and the wire W held between the pair of feed gears 30 is fed in the reverse direction indicated by the arrow R. By feeding the wire W in the reverse direction, the wire W is wound around the reinforcing bar S.

[0051] When the control unit 112 determines that the wire W has been wound around the rebar S, it stops driving the feed motor 31 in the reverse rotation direction and then drives the torsion motor 80 in the forward rotation direction. Driving the torsion motor 80 in the forward rotation direction causes the sleeve 71 to move further forward as indicated by the arrow A1. The forward movement of the sleeve 71 is transmitted to the cutting unit 6 by the transmission mechanism 62, causing the movable blade unit 61 to rotate, and the wire W is cut at a predetermined position by the operation of the fixed blade unit 60 and the movable blade unit 61.

[0052] By driving the torsion motor 80 in the forward direction, the sleeve 71 is moved forward as indicated by the arrow A1, cutting the two wires W. At almost the same time, the wire W is pushed forward by the wire retaining body 70, and the tip and end of the wire W are bent toward the reinforcing bar S.

[0053] After the tip and end of the wire W are bent toward the rebar S, the torsion motor 80 is further driven in the forward rotation direction, causing the sleeve 71 to move further forward. When the sleeve 71 has moved to a predetermined position, the restriction on the rotation of the sleeve 71 is released.

[0054] As a result, the torsion motor 80 is further driven in the forward direction, causing the sleeve 71 to rotate and starting the operation of twisting the wire W held by the wire holding body 70. When it is detected that the load on the torsion motor 80 has reached its maximum due to the twisting of the wire W, the control unit 112 stops driving the torsion motor 80 in the forward direction. Next, the control unit 112 drives the torsion motor 80 in the reverse direction. When the torsion motor 80 is driven in the reverse direction, the sleeve 71 moves backward, in the direction of arrow A2, with its rotation restricted.

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

[0056] The control unit 112 executes the reverse braking or short braking described above based on a predetermined pattern defined by a program to stop the rotation of the torsion motor 80 and the feed motor 31. This allows for appropriate braking control. Furthermore, the regenerative current generated by the execution of the reverse braking is prevented from flowing to the power supply unit 200, thereby protecting the power supply unit 200.

[0057] The bundling system may include a reel storage unit outside the rebar bundling machine 1A, rather than including the magazine 2 for storing the reel 20 in the rebar bundling machine 1A. In this case, a wire pull-out unit that pulls out the wire W from the reel 20 stored in the reel storage unit may be provided separately from the wire feeding unit 3.

[0058] 6A and 6B are configuration diagrams showing another example of the binding system of this embodiment. The binding system 100B shown in Fig. 6A includes a reinforcing bar binding machine 1B, a reel housing section 22 that houses a reel 20, and a wire unwinding section 400 that unwinds the wire W from the reel 20 housed in the reel housing section 22. Although not shown, the binding system 100B also includes a moving section, a reinforcing bar placement section, a main control section, a power supply section, and a backflow prevention section shown in Figs. 1, 2, and 3.

[0059] The reinforcing bar binding machine 1B does not have a magazine. The rest of the configuration may be the same as that of the reinforcing bar binding machine 1A shown in Figures 4 and 5. The wire draw-out unit 400 includes a pair of feed rollers 401 that clamp and feed the wire W, a draw-out motor 402 that drives the feed rollers 401, and a transmission unit 403 that transmits the driving force of the draw-out motor 402 to the feed rollers 401.

[0060] The wire pull-out section 400 is driven by a pull-out motor 402 to rotate the feed roller 401 in a predetermined direction, thereby pulling out the wire W from the reel 20. The pull-out motor 402 is an example of the motor 110 shown in FIG.

[0061] 6B includes a reinforcing bar binding machine 1B, a reel housing section 22 that houses a reel 20, and a wire unwinding section 410 that unwinds the wire W from the reel 20 housed in the reel housing section 22. Although not shown, the binding system 100C also includes a moving section, a reinforcing bar placement section, a main control section, a power supply section, and a backflow prevention section shown in FIGS.

[0062] The wire pull-out section 410 includes rollers 411 and 412 that form a transport path for the wire W, a pull-out roller 413 that is supported so as to be movable in a direction intersecting the transport path for the wire W, a pull-out motor 414 that moves the pull-out roller 413, and a transmission section 415 that transmits the driving force of the pull-out motor 414 to the pull-out roller 413.

[0063] The wire pull-out unit 410 is driven by a pull-out motor 414 to move the pull-out roller 413 in a direction away from the transport path of the wire W, thereby pulling out the wire W from the reel 20. The wire pull-out unit 410 is also driven by a pull-out motor 414 to move the pull-out roller 413 in a direction toward the transport path of the wire W, thereby creating an excess portion Wa of the wire W pulled out from the reel 20, and this excess portion Wa can be fed by the wire feed unit 3. The pull-out motor 414 is an example of the motor 110 shown in FIG. 1 .

[0064] Regarding the drawer motor 402 and the drawer motor 414, the control unit 112 executes the above-mentioned reverse braking or short braking based on a predetermined pattern defined in the program when controlling to stop the rotation of the drawer motor 402 or the drawer motor 414. This allows for appropriate braking control. In addition, the regenerative current generated by the execution of reverse braking is prevented from flowing to the power supply unit 200, thereby protecting the power supply unit 200.

[0065] <Configuration Example of Reinforcing Bar Binding Machine According to This Embodiment> FIGS. 7A and 7B are functional block diagrams showing an example of a binding system including a reinforcing bar binding machine according to this embodiment.

[0066] The rebar binding machine 1C is used in a binding system 100D. As shown in FIG. 7A , the binding system 100D includes a power supply unit 200 that supplies electricity to the rebar binding machine 1C and other components. The rebar binding machine 1C includes an electrically driven motor 110 and a drive unit 111 that drives the motor 110 with electricity supplied from the power supply unit 200 and is capable of at least performing reverse braking, which switches the positive and negative polarities of the current flowing through the motor 110 to reverse the direction of rotation of the motor 110. The rebar binding machine 1C also includes a backflow prevention unit 300 that prevents current from flowing back from the rebar binding machine 1C to the power supply unit 200. By providing the backflow prevention unit 300 in the rebar binding machine 1C, the binding system 100D can prevent regenerative current generated by reverse braking in the rebar binding machine 1C from flowing to the power supply unit 200. This protects the power supply unit 200.

[0067] As shown in Fig. 7B, the bundling system 100D may include a moving unit 160 that moves the reinforcing bar binding machine 1C. The bundling system 100D may also include a main control unit 170 that controls the reinforcing bar binding machine 1C and the moving unit 160. Furthermore, the bundling system 100D may also include a reinforcing bar placement unit shown in Fig. 2.

[0068] The rebar binding machine 1C may include a control unit 112 that performs rotation control to rotate the motor 110 and braking control to stop the rotation of the motor 110, based on a control signal input from the main control unit 170, the load on the motor 110, a program, etc. The rebar binding machine 1C may also include an external signal connection unit 113 to which the main control unit 170 is communicatively connected and to which control signals, etc. are input from the main control unit 170. The rebar binding machine 1C may also include a power control unit 114 that controls the supply of electricity to the control unit 112, the drive unit 111, etc. The rebar binding machine 1C may also include a power connection unit 115 to which a power supply unit 200 is connected.

[0069] As described above, the binding system 100 is configured to include the backflow prevention unit 300 separate from the reinforcing bar binding machine 1A. In contrast, the binding system 100D includes the backflow prevention unit 300 as part of the reinforcing bar binding machine 1C. The rest of the configuration is the same between the reinforcing bar binding machine 1A and the reinforcing bar binding machine 1C, and between the binding system 100 and the binding system 100D.

[0070] This application is based on a Japanese patent application (Patent Application No. 2023-222431) filed on December 28, 2023, the contents of which are incorporated herein by reference.

[0071] According to the present disclosure, it is possible to provide a binding system that can prevent regenerative current from flowing from a binding machine to a power supply unit, and a binding machine that can prevent regenerative current from flowing to a power supply unit.

[0072] 1A, 1B, 1C Rebar tying machine 100, 100B, 100C, 100D Binding system 110 Motor 111 Drive unit 112 Control unit 113 External signal connection unit 114 Power control unit 115 Power supply connection unit 150 Rebar placement unit 160 Moving unit 161 Support unit 162 Mounting unit 163 Arm unit 164 Joint unit 165 Frame 170 Main control unit 200 Power supply unit 300 Backflow prevention unit 301 Diode 302 Resistor 303 Capacitor 31 Feed motor (motor) 80 Torsion motor (motor) 402 Pull-out motor (motor) 414 Pull-out motor (motor) 22 Reel storage unit

Claims

1. A binding system comprising a binding machine for binding an object to be bound, a power supply unit for supplying electricity to the binding machine, and a backflow prevention unit for preventing a regenerative current from flowing from the binding machine to the power supply unit, wherein the binding 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 to reverse the rotation direction of the motor.

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

3. The binding system according to claim 1, wherein the binding machine includes a feed motor for feeding a wire for binding an object to be bound, and a twisting motor for twisting the wire, and the motor includes the feed motor and / or the twisting motor.

4. The binding system according to claim 1, comprising a reel housing unit for housing a reel around which a wire is wound, and a wire drawing unit for drawing a wire from the reel housed in the reel housing unit, wherein the wire drawing unit includes a drawing motor for drawing the wire, and the motor includes the drawing motor.

5. A binding machine comprising 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 to reverse the rotation direction of the motor, and a backflow prevention unit for preventing a regenerative current from flowing to the power supply unit.

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