Steel bar binding machine

Abstract

A rebar binding machine is provided with: a first brushless motor that conveys a wire wound around a reel; a second brushless motor that twists the metal wires; a head in which the spool, the first brushless motor, and the second brushless motor are disposed; a handle portion extending downward from the head portion; a foot part which is disposed below the handle part and to which a battery is connected; and a controller that controls the first brushless motor and the second brushless motor. The controller is arranged on the handle part.

Description

Technical Field

[0001] The technology disclosed in this specification relates to a steel bar bundling machine. Background Art

[0002] In the technical field of reinforcing bar binding machines, a reinforcing bar binding machine such as that disclosed in Patent Document 1 is known.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2019-112868 Summary of the invention

[0006] Problem that the invention aims to solve

[0007] When a brushless motor is used as a power source of a reinforcing bar binding machine, a controller for controlling the brushless motor is required. In order to suppress the increase in size of the reinforcing bar binding machine, the controller needs to be arranged at an appropriate position.

[0008] An object of the technology disclosed in this specification is to arrange a controller at an appropriate position in a reinforcing bar tying machine.

[0009] Solutions for solving problems

[0010] The present specification discloses a steel bar bundling machine. Alternatively, the steel bar bundling machine includes: a first brushless motor that conveys a metal wire wound on a reel; a second brushless motor that twists the metal wire; a head portion on which a reel, a first brushless motor, and a second brushless motor are arranged; a handle portion that extends downward from the head portion; a foot portion that is arranged below the handle portion and to which a battery is connected; and a controller that controls the first brushless motor and the second brushless motor. Alternatively, the controller is arranged on the handle portion.

[0011] Effects of the Invention

[0012] According to the technology disclosed in this specification, in the reinforcing bar tying machine, the controller is arranged at an appropriate position. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a perspective view of the reinforcing bar binding machine according to the first embodiment as viewed from the upper left rear.

[0014] Figure 2 This is a perspective view of the reinforcing bar binding machine according to the first embodiment as viewed from the upper right rear side.

[0015] Figure 3 This is a perspective view of a partial internal structure of the reinforcing bar binding machine according to the first embodiment as viewed from the upper right rear side.

[0016] Figure 4 This is a perspective view of a partial internal structure of the reinforcing bar binding machine according to the first embodiment as viewed from the upper left front.

[0017] Figure 5 This is a diagram showing the internal structure of the reinforcing bar tying machine according to the first embodiment as viewed from the left.

[0018] Figure 6 This is an exploded perspective view of the feed motor according to the first embodiment as viewed from the lower right front.

[0019] Figure 7 This is an exploded perspective view of the feed motor according to the first embodiment as viewed from the upper right front.

[0020] Figure 8 This is an exploded perspective view of the twist motor according to the first embodiment as seen from the upper left rear.

[0021] Fig. 9 This is an exploded perspective view of the twist motor according to the first embodiment as seen from the upper left front.

[0022] Fig.10 It is a front view showing the controller of the first embodiment.

[0023] Fig.11 It is a rear view showing the controller according to the first embodiment.

[0024] Fig.12 It is a diagram schematically showing an example of arrangement of a controller according to the first embodiment.

[0025] Fig.13 It is a diagram schematically showing an example of arrangement of a controller according to the second embodiment.

[0026] Fig.14 It is a diagram schematically showing a configuration example of a controller according to the third embodiment.

[0027] Fig.15 It is a diagram schematically showing a configuration example of a controller according to a fourth embodiment.

[0028] Fig.16 It is a diagram schematically showing a configuration example of a controller according to the fifth embodiment.

[0029] Fig.17 This is an exploded perspective view of the feed motor according to the fifth embodiment as viewed from the lower right front.

[0030] Fig.18 This is an exploded perspective view of the feed motor according to the fifth embodiment as viewed from the upper right front.

[0031] Fig.19 This is an exploded perspective view of the twist motor according to the fifth embodiment as viewed from the upper left rear.

[0032] Fig. 20 This is an exploded perspective view of the twist motor according to the fifth embodiment as viewed from the upper left front.

[0033] Fig.21 It is a front view of the controller of the fifth embodiment.

[0034] Fig. 22 This is a diagram schematically showing a configuration example of a controller according to the sixth embodiment.

[0035] Fig.23 This is a diagram schematically showing an example of the configuration of the controller according to the seventh embodiment.

[0036] Fig.24 It is a diagram schematically showing a configuration example of a controller according to the eighth embodiment.

[0037] Fig.25 This is a diagram schematically showing an example of a configuration of a controller according to the ninth embodiment.

[0038] Fig.26 It is a diagram schematically showing a configuration example of a controller according to the tenth embodiment.

[0039] Fig. 27 It is a perspective schematic diagram showing a controller according to the tenth embodiment.

[0040] Fig.28 This is an exploded perspective view of the feed motor according to the tenth embodiment as viewed from the lower right front.

[0041] Fig.29 This is an exploded perspective view of the feed motor according to the tenth embodiment as viewed from the upper right front.

[0042] Fig.30 This is an exploded perspective view of the twist motor according to the tenth embodiment as viewed from the upper left rear.

[0043] Fig.31 This is an exploded perspective view of the twist motor according to the tenth embodiment as viewed from the upper left front.

[0044] Fig.32 It is a diagram schematically showing a configuration example of a controller according to the eleventh embodiment.

[0045] Fig.33 This is a diagram schematically showing a configuration example of a controller according to the twelfth embodiment. DETAILED DESCRIPTION

[0046] In one or more embodiments, the steel bar tying machine may include: a first brushless motor that conveys the metal wire wound on a drum; a second brushless motor that twists the metal wire; a head portion on which the drum, the first brushless motor, and the second brushless motor are arranged; a handle portion that extends downward from the head portion; a foot portion that is arranged below the handle portion and to which a battery is connected; and a controller that controls the first brushless motor and the second brushless motor. The controller may be arranged on the handle portion.

[0047] In the above structure, the controller is arranged at an appropriate position in the reinforcing bar binding machine.

[0048] In one or more embodiments, the controller may include a circuit board that is long in a predetermined direction, and the controller may be arranged on the handle portion such that the circuit board extends in a vertical direction.

[0049] In the above structure, the controller is appropriately arranged on the handle portion.

[0050] In one or more embodiments, the controller may include: a first control circuit mounted on a circuit board, the first control circuit controlling a first brushless motor; and a second control circuit mounted on a circuit board, the second control circuit controlling a second brushless motor. Alternatively, the controller may be arranged on the handle portion in such a manner that a first surface of the circuit board on which the first control circuit and the second control circuit are mounted faces left or right.

[0051] In the above structure, the controller is appropriately arranged on the handle portion.

[0052] In one or more embodiments, the steel bar binding machine may include: a first brushless motor that conveys a metal wire wound on a drum; a second brushless motor that is arranged at a position behind the first brushless motor and twists the metal wire; a head portion on which the drum, the first brushless motor, and the second brushless motor are arranged; a handle portion that extends downward from the head portion; a foot portion that is arranged below the handle portion and to which a battery is connected; and a controller that includes a circuit board that extends in a front-to-back direction and controls the first brushless motor and the second brushless motor. Alternatively, a first control circuit that includes a first gate drive circuit and a first inverter circuit for controlling the first brushless motor may be mounted on the front side of the circuit board, and a second control circuit that includes a second gate drive circuit and a second inverter circuit for controlling the second brushless motor may be mounted on the rear side of the circuit board.

[0053] In the above structure, the distance between the first brushless motor and the first control circuit is shortened, and the distance between the second brushless motor and the second control circuit is shortened. Thus, in the reinforcing bar binding machine, the controller is arranged at an appropriate position.

[0054] In one or more embodiments, the controller may be configured on the head.

[0055] In the above structure, the controller is arranged at an appropriate position in the reinforcing bar binding machine.

[0056] In one or more embodiments, the controller may be arranged on the handle portion such that a first surface of the circuit board on which the first control circuit and the second control circuit are mounted faces leftward or rightward.

[0057] In the above structure, the controller is appropriately configured in the head.

[0058] In one or more embodiments, the controller may be arranged on the handle portion such that a first surface of the circuit board on which the first control circuit and the second control circuit are mounted faces upward.

[0059] In the above structure, the controller is appropriately configured in the head.

[0060] In one or more embodiments, the first brushless motor may include a first stator and a first rotor arranged around the first stator, the first brushless motor may be arranged in such a manner that the rotation axis of the first rotor extends in the up-down direction, the first terminal connecting the plurality of coils of the first stator may be arranged at the rear of the first stator, the first sensor substrate for detecting the rotation of the first rotor may be arranged at a position lower than the first stator, the first terminal and the controller may be connected via a first power cable, and the first sensor substrate and the controller may be connected via a first signal cable.

[0061] In the above structure, the first brushless motor and the controller are arranged in an appropriate positional relationship.

[0062] In one or more embodiments, the second brushless motor may include a second stator and a second rotor arranged around the second stator, the second brushless motor may be arranged in such a manner that the rotation axis of the second rotor extends in the front-to-back direction, the second terminal connecting the plurality of coils of the second stator may be arranged at the lower part of the second stator, the second sensor substrate for detecting the rotation of the second rotor may be arranged at a position farther rearward than the second stator, the second terminal and the controller may be connected via a second power cable, and the second sensor substrate and the controller may be connected via a second signal cable.

[0063] In the above structure, the second brushless motor and the controller are arranged in an appropriate positional relationship.

[0064] In one or more embodiments, at least one of the first brushless motor and the second brushless motor may include a sensor substrate for detecting rotation of the rotor. The sensor substrate may include an inverter circuit for driving the motor.

[0065] In the above structure, the structure of the controller is simplified and the degree of freedom of configuration of the controller is improved.

[0066] In one or more embodiments, the controller may include a circuit board having an inverter circuit for driving the motor and a heat sink thermally connected to the inverter circuit.

[0067] In the above configuration, it is possible to suppress a temperature increase in the controller.

[0068] In one or more embodiments, the circuit board may include a heat sink thermally connected to at least one of the first inverter circuit and the second inverter circuit.

[0069] In the above configuration, it is possible to suppress a temperature increase in the controller.

[0070] In one or more embodiments, the reinforcing bar tying machine may further include a wireless communication unit provided on the handle.

[0071] In the above structure, the wireless communication unit and the controller are arranged in an appropriate positional relationship.

[0072] In one or more embodiments, the reinforcing bar binding machine may include a noise removing member for removing electromagnetic noise on a power line connecting at least one of the first brushless motor and the second brushless motor and the controller.

[0073] In the above structure, the influence of electromagnetic noise can be suppressed by arranging the brushless motor and the controller in an appropriate positional relationship.

[0074] In one or more embodiments, the steel bar bundling machine may include: a first brushless motor that transports a metal wire wound on a reel; a second brushless motor that twists the metal wire; a head portion on which a reel, a first brushless motor, and a second brushless motor are disposed; a handle portion that extends downward from the head portion; a foot portion that is disposed below the handle portion and to which a battery is connected; and a controller that controls the first brushless motor and the second brushless motor, the controller being disposed at the foot portion, the controller having a circuit board, a controller housing that houses the circuit board, and terminals that connect the battery and the circuit board.

[0075] In the above structure, the controller is arranged at an appropriate position in the reinforcing bar binding machine.

[0076] Hereinafter, the embodiment will be described with reference to the drawings. In the embodiment, the terms left, right, front, rear, top, and bottom are used to describe the positional relationship of each part. These terms represent relative positions or directions with respect to the center of the reinforcing bar binding machine 2 as a reference.

[0077] [First embodiment]

[0078] <Rebar tying machine>

[0079] The first embodiment will be described. Figure 1 This is a perspective view of the reinforcing bar binding machine 2 according to the present embodiment as viewed from the upper left rear. Figure 2 This is a perspective view of the reinforcing bar binding machine 2 according to the present embodiment as viewed from the upper right rear. Figure 3 This is a perspective view of a partial internal structure of the reinforcing bar tying machine 2 according to the present embodiment, as viewed from the upper right rear side. Figure 4 This is a perspective view of a partial internal structure of the reinforcing bar binding machine 2 according to the present embodiment as viewed from the upper left front.

[0080] Figure 5 This is a diagram showing the internal structure of a reinforcing bar binding machine 2 according to the present embodiment as viewed from the left. The reinforcing bar binding machine 2 is an electric tool for binding a plurality of reinforcing bars with wires.

[0081] The reinforcing bar binding machine 2 includes a feeding motor 100, a twisting motor 200, a head 4, a handle 6, a leg 8, and a controller 300. The wire is wound on the reel 24. The feeding motor 100 conveys the wire wound on the reel 24. The twisting motor 200 twists the wire conveyed by the feeding motor 100. The reel 24, the feeding motor 100, and the twisting motor 200 are arranged on the head 4. The handle 6 extends downward from the head 4 for the user to hold. The leg 8 is arranged below the handle 6 and is connected to the battery 10. The battery 10 can be detached from the lower part of the leg 8. The battery 10 is a sliding battery that can be detached by sliding relative to the leg 8. The battery 10 is a lithium ion battery that can be charged by a charger. When the battery 10 is connected to the leg 8, power is supplied from the battery 10 to the reinforcing bar binding machine 2. A battery terminal electrically connected to the battery 10 is provided on the lower surface of the leg 8. The battery terminal is electrically connected to the controller 300. The controller 300 controls the feed motor 100 and the twisting motor 200. The controller 300 is disposed on the handle portion 6.

[0082] The reinforcing bar binding machine 2 includes a housing 12. The housing 12 includes a left housing 14, a right housing 16, and a side cover housing 18. The left housing 14, the right housing 16, and the side cover housing 18 are each made of a synthetic resin. The left housing 14, the right housing 16, and the side cover housing 18 can be respectively referred to as a plurality of housing plates constituting the housing 12. The left housing 14 has an outer shape of the left half of the head 4, an outer shape of the left half of the handle 6, and an outer shape of the left half of the foot 8 formed integrally. The right housing 16 has a portion of an outer shape of the right half of the head 4, an outer shape of the right half of the handle 6, and an outer shape of the right half of the foot 8 formed integrally. The left housing 14 is fixed to the right housing 16 by a plurality of screws. The side cover housing 18 has a portion of an outer shape of the right half of the head 4 formed. The side cover housing 18 is fixed to the right housing 16 by a plurality of screws. A reel storage chamber 20 for storing a reel 24 is formed at the rear of the head 4. The upper part of the reel storage chamber 20 is covered by a reel cover 22. The reel cover 22 is held on the head 4 by annular mounting portions 22a and 22b provided on the left and right sides, and the reel storage chamber 20 is opened and closed by rotating the reel cover 22 relative to the head 4 with the left and right directions as the rotation axis.

[0083] The handle 6 is provided with a trigger 28 at the upper front part, which can be pulled by the user, and a trigger lock 30, which is arranged behind the trigger 28 and can be switched between a state in which the pulling operation of the trigger 28 is allowed and a state in which the pulling operation of the trigger 28 is prohibited. The trigger 28 is held by the left housing 14 and the right housing 16 in a manner that it can slide in the front-back direction relative to the handle 6. The trigger 28 is urged forward by the compression spring held by the left housing 14 and the right housing 16. A trigger switch 34 is arranged at the upper part of the interior of the handle 6. The trigger switch 34 is electrically connected to the controller 300. When the user puts his finger on the trigger 28 and pulls the trigger 28 against the force of the compression spring, the trigger 28 moves backward and pushes the trigger switch 34. When the user's finger leaves the trigger 28, the trigger 28 moves forward and leaves the trigger switch 34 under the force of the compression spring.

[0084] The trigger lock 30 is held by the left housing 14 and the right housing 16 in a manner that allows sliding in the left-right direction relative to the handle portion 6. The trigger lock 30 can move between a permitted position that allows the pulling operation of the trigger 28 and a prohibited position that prohibits the pulling operation of the trigger 28. When the trigger lock 30 is in the permitted position, the trigger 28 can move backward. That is, when the trigger lock 30 is in the permitted position, the user can pull the trigger 28. When the user presses the trigger lock 30 from the left side of the handle portion 6 from the state in which the trigger lock 30 is in the permitted position, the trigger lock 30 slides to the right and moves to the prohibited position. When the trigger lock 30 is in the prohibited position, the trigger lock 30 is opposite to the stopper of the trigger 28. In this state, when the trigger 28 moves backward, the trigger lock 30 abuts against the trigger 28, prohibiting the trigger 28 from further moving backward. That is, when the trigger lock 30 is in the inhibiting position, the user is prohibited from pulling the trigger 28 .

[0085] The head 4 mainly includes a storage mechanism 36 , a feeding mechanism 38 , a braking mechanism 40 , a guiding mechanism 42 , a cutting mechanism 44 , and a twisting mechanism 46 .

[0086] The storage mechanism 36 is disposed at the rear portion of the head 4, and holds the reel 24 stored in the reel storage chamber 20 in a detachable manner. The reel 24 is rotatably supported by the storage mechanism 36 in the reel storage chamber 20.

[0087] The storage mechanism 36 includes a cam member 54 disposed on the left side of the reel storage chamber 20. The cam member 54 holds the reel cover 22. In addition, the storage mechanism 36 includes a bearing 64 and a magnetic sensor 66 for supporting the reel 24. The reel 24 is rotatably held on the right housing 16 by means of the bearing 64. The magnetic sensor 66 is disposed on the outer side of the right housing 16. The magnetic sensor 66 is electrically connected to the controller 300. The magnetic sensor 66 is mounted on the right housing 16. In a state where the side cover housing 18 is mounted on the right housing 16, the magnetic sensor 66 is clamped by the right housing 16 and the side cover housing 18. When the reel 24 rotates, the sensor magnet disposed on the reel 24 rotates integrally with the reel 24, and the magnetic change is detected by the magnetic sensor 66. The controller 300 can detect the rotation of the reel 24 based on the magnetic change from the sensor magnet detected by the magnetic sensor 66. In addition, the rotation sensor for detecting the rotation of the reel 24 may not be the magnetic sensor 66. As a rotation sensor for detecting the rotation of the reel 24 , a photocoupler (optical sensor) can be exemplified.

[0088] The feeding mechanism 38 is arranged at the upper part near the center in the front-back direction of the head 4, and feeds the wire supplied from the reel 24 of the storage mechanism 36 to the guide mechanism 42 in front of the head 4. The feeding mechanism 38 includes a guide member 68, a cover member 70, a feeding motor 100, a speed reduction mechanism 74, a driving gear 78, a driven gear 80, a release lever 82, and a locking lever 86.

[0089] The driving gear 78 is connected to the feeding motor 100 via the speed reduction mechanism 74. The feeding motor 100 is a DC brushless motor. The feeding motor 100 is electrically connected to the controller 300. The controller 300 can control the operation of the feeding motor 100. The driving gear 78 is rotatably held on the cover member 70 by means of a bearing. The speed reduction mechanism 74 is accommodated in the space inside the cover member 70. That is, the speed reduction mechanism 74 is arranged on the feeding motor 100 side when viewed from the cover member 70, and the speed reduction mechanism 74 reduces the rotation of the feeding motor 100 and transmits it to the driving gear 78.

[0090] The guide member 68 includes a through hole for guiding the wire pulled out from the spool 24 toward the driving gear 78 and the driven gear 80 .

[0091] The driven gear 80 is rotatably supported by the release lever 82. The release lever 82 is swingably supported by the right housing 16. The wire clamped by the driving gear 78 and the driven gear 80 is fed to the guide mechanism 42, and the wire is pulled out from the reel 24. The driving gear 78 and the driven gear 80 can be called feed rollers for feeding the wire.

[0092] When the user of the reinforcing bar tying machine 2 pushes in the release lever 82, the release lever 82 swings, and the driven gear 80 moves away from the driving gear 78. The release lever 82 remains in the pushed-in state. When the wire extending from the reel 24 is placed in the feeding mechanism 38, the user pushes in the release lever 82 to move the driven gear 80 away from the driving gear 78, and in this state, the front end of the wire pulled out from the reel 24 passes through the through hole of the guide member 68 and is arranged between the driving gear 78 and the driven gear 80. Then, when the user swings the locking lever 86 in a direction away from the release lever 82, the engagement of the locking lever 86 is released, the release lever 82 swings, the driven gear 80 engages with the driving gear 78, and the wire is clamped between the driving gear 78 and the driven gear 80.

[0093] The guide mechanism 42 is arranged at the front part of the head 4, and guides the metal wire fed from the feeding mechanism 38 to the periphery of the plurality of reinforcing bars in a circular ring shape. The guide mechanism 42 includes a guide tube 88, an upper curling guide 90, and a lower curling guide 92. The end of the guide tube 88 on the rear side opens toward between the driving gear 78 and the driven gear 80 of the feeding mechanism 38. The metal wire fed from the feeding mechanism 38 is fed into the guide tube 88. The end of the guide tube 88 on the front side opens toward the interior of the upper curling guide 90. The metal wire fed from the guide tube 88 is guided toward the swing member 120. The swing member 120 cuts the metal wire by shearing. The metal wire is fed toward the lower curling guide 92.

[0094] The lower curl guide 92 guides the wire fed from the front end of the upper curl guide 90. The wire fed from the rear of the lower curl guide 92 to the rear of the upper curl guide 90 is fed again from the front of the upper curl guide 90 to the front of the lower curl guide 92.

[0095] A magnetic sensor 134 is mounted on the right housing 16 in front of the head 4. The magnetic sensor 134 is electrically connected to the controller 300. When the reinforcing bar binding machine 2 is placed on a plurality of reinforcing bars by the user, if the plurality of reinforcing bars are pressed against the upper curling guide 90, the upper curling guide 90 swings, and the sensor magnet mounted on the upper curling guide 90 is arranged at a position separated from the magnetic sensor 134. The controller 300 can detect whether the plurality of reinforcing bars are pressed against the upper curling guide 90 based on the detection signal of the magnetic sensor 134.

[0096] The right housing 16 in front of the head 4 is provided with screw bosses 16a, 16b, and 16c used when the left housing 14 is mounted on the right housing 16. By mounting the upper curling guide 90 on the right housing 16 using the screw bosses 16a, 16b, and 16c used when the left housing 14 is mounted on the right housing 16, the upper curling guide 90 can be mounted on the right housing 16 without increasing the number of components. In addition, the upper curling guide 90 can be accurately positioned relative to the right housing 16. Furthermore, the portion where the screw bosses 16a, 16b, and 16c are formed has a relatively high strength in the right housing 16, so that even when a load caused by collision with a plurality of reinforcing bars is transmitted from the upper curling guide 90 to the right housing 16, high durability can be ensured.

[0097] The lower curling guide 92 is swingably supported by the left housing 14 and the right housing 16 via a swing shaft 92a. The lower curling guide 92 can swing between a closed state and an open state. The lower curling guide 92 is urged toward a closed direction by a torsion spring 92b. When the user uses the reinforcing bar binding machine 2, the lower curling guide 92 is in a closed state. When the user uses the reinforcing bar binding machine 2 and the metal wire is entangled in the twisting mechanism 46, the user can remove the metal wire entangled in the twisting mechanism 46 by overcoming the urging force of the torsion spring 92b and opening the lower curling guide 92.

[0098] An opening and closing detection mechanism 136 for detecting the opening and closing state of the lower curling guide 92 is provided at the front lower part of the head 4. The opening and closing detection mechanism 136 is mounted on the right shell 16. The opening and closing detection mechanism 136 includes an opening and closing detection member 138, a compression spring 140 and a magnetic sensor 142. The opening and closing detection member 138 is supported on the right shell 16 in a swingable manner. In addition, the opening and closing detection member 138 is biased in a swinging direction toward the upper side by the compression spring 140 held by the right shell 16. A sensor magnet is mounted on the opening and closing detection member 138. The magnetic sensor 142 is fixed to the right shell 16. The magnetic sensor 142 is electrically connected to the controller 300. When the lower curling guide 92 is closed, the lower curling guide 92 presses the opening and closing detection member 138 downward, and the sensor magnet of the opening and closing detection member 138 is arranged at a position opposite to the magnetic sensor 142. When the user opens the lower curling guide 92, the lower curling guide 92 leaves the opening and closing detection member 138. As a result, the opening and closing detection member 138 swings, and the sensor magnet of the opening and closing detection member 138 is arranged at a position separated from the magnetic sensor 142. The controller 300 can detect the opening and closing state of the lower curling guide 92 based on the detection signal of the magnetic sensor 142. In addition, the left housing 14 near the lower curling guide 92 is provided with a metal side plate 180 mounted on the left housing 14. The right housing 16 near the lower curling guide 92 is provided with a metal side plate 184 mounted on the right housing 16.

[0099] The upper curling guide 90 feeds the wire downward from the front upper part of the plurality of reinforcing bars, and the lower curling guide 92 feeds the wire fed from the upper curling guide 90 upward from the rear lower part of the plurality of reinforcing bars. Thus, the wire fed from the feeding mechanism 38 is wound around the plurality of reinforcing bars in a circular ring shape. After the feeding mechanism 38 feeds the wire of the feeding amount set by the user, the feeding motor 100 is stopped to stop feeding the wire.

[0100] In conjunction with the feeding mechanism 38 stopping the feeding of the wire, the brake mechanism 40 stops the rotation of the reel 24. The brake mechanism 40 includes a solenoid 146, a compression spring 148, and a brake member 150. The solenoid 146 is electrically connected to the controller 300. The controller 300 can control the operation of the solenoid 146. The brake member 150 is mounted on the right housing 16 so that it can swing. The output shaft of the solenoid 146 that moves forward and backward in the up and down directions is connected to the brake member 150. In addition, the brake member 150 is urged by the compression spring 148 in the swinging direction away from the reel 24. In a state where the solenoid 146 is not energized, the brake member is separated from the engaging portion of the reel 24 by the urging force of the compression spring 148. In a state where the solenoid 146 is energized, the solenoid 146 drives the brake member 150, so that torque acts on the brake member 150, thereby the brake member 150 swings and engages with the engaging portion of the reel 24. When the feeding mechanism 38 feeds out the wire, the controller 300 does not energize the solenoid 146, so that the brake member 150 is separated from the engaging portion of the reel 24. As a result, the reel 24 can rotate freely, and the feeding mechanism 38 can pull out the wire from the reel 24. In addition, when the feeding mechanism 38 stops feeding out the wire, the controller 300 energizes the solenoid 146, so that the brake member 150 is engaged with the engaging portion of the reel 24. As a result, the rotation of the reel 24 is prohibited. As a result, even after the feeding mechanism 38 stops feeding out the wire, the reel 24 continues to rotate due to inertia, and the wire is prevented from being loosened between the reel 24 and the feeding mechanism 38.

[0101] The brake mechanism 40 is arranged outside the right case 16 and is accommodated in a space defined by the right case 16 and the side cover case 18. In front of the drum 24, a twisting motor 200 of a twisting mechanism 46 described later is arranged.

[0102] The solenoid 146 is arranged so that its longitudinal direction is substantially parallel to the tangential direction of the rotational motion of the portion of the spool 24 closest to the solenoid 146. The solenoid 146 is arranged so that its longitudinal direction is substantially parallel to the axis of the feed motor 100.

[0103] The cutting mechanism 44 is disposed at the front portion of the head 4, and cuts the wire in a state where the wire is wound around a plurality of reinforcing bars. The cutting mechanism 44 and the upper curling guide 90 of the guide mechanism 42 are formed into a unit.

[0104] The twisting mechanism 46 is arranged in the range from the front part to the middle part in the front-back direction of the head 4, and the wires wound around the plurality of reinforcing bars are twisted to bundle the plurality of reinforcing bars with the wires. The twisting mechanism 46 includes a twisting motor 200, a speed reduction mechanism 172, a sleeve 174, a screw shaft (not shown) arranged inside the sleeve 174, a pusher 176, and a hook 178.

[0105] The twisting motor 200 is a DC brushless motor. The twisting motor 200 is electrically connected to the controller 300. The controller 300 can control the action of the twisting motor 200. The rotation of the twisting motor 200 is transmitted to the screw shaft via the speed reduction mechanism 172. The twisting motor 200 can rotate in the forward and reverse directions, and the screw shaft can also rotate in the forward and reverse directions accordingly. The sleeve 174 is configured in a manner covering the periphery of the screw shaft. In a state where the rotation of the sleeve 174 is prohibited, if the screw shaft rotates in the forward direction, the sleeve 174 moves forward, and if the screw shaft rotates in the reverse direction, the sleeve 174 moves backward. In addition, in a state where the rotation of the sleeve 174 is allowed, if the screw shaft rotates, the sleeve 174 rotates together with the screw shaft. When the sleeve 174 moves forward, the pusher 176 moves forward, and when the sleeve 174 moves backward, the pusher 176 moves backward. When the sleeve 174 advances from the initial position to the specified position, the pusher 176 pushes the lower part of the cutting mechanism 44 forward, thereby swinging the swing member 120. Conversely, when the sleeve 174 retreats from the advanced position to the specified position, the pusher 176 pushes the lower part of the cutting mechanism 44 backward, thereby swinging the swing member 120. The hook 178 is provided at the front end of the sleeve 174, and opens and closes according to the position of the sleeve 174 in the front-to-back direction. When the sleeve 174 moves forward, the hook 178 closes to hold the wire. Conversely, when the sleeve 174 moves backward, the hook 178 opens to release the wire.

[0106] In a state where the metal wire is wound around a plurality of steel bars, the controller 300 rotates the twisting motor 200. At this time, the rotation of the sleeve 174 is prohibited, and the sleeve 174 is advanced and the pusher 176 and the hook 178 are advanced by the rotation of the screw shaft, and the metal wire is cut by the cutting mechanism 44, and the hook 178 is closed to hold the metal wire. Furthermore, if the rotation of the sleeve 174 is allowed, the sleeve 174 is rotated and the hook 178 is rotated by the rotation of the screw shaft. Thus, the metal wire is twisted, thereby bundling a plurality of steel bars. The user can pre-set the twisting strength of the metal wire. If the metal wire is twisted to the set twisting strength, the controller 300 rotates the twisting motor 200 in the reverse direction. At this time, the rotation of the sleeve 174 is prohibited, and the sleeve 174 is retreated and the hook 178 is opened and retreated by the rotation of the screw shaft, thereby releasing the metal wire. In addition, the sleeve 174 retreats, and the pusher 176 retreats, and the cutting mechanism 44 returns to the initial state. Afterwards, the pusher 176 and the hook 178 retreat to the initial position, and the rotation of the sleeve 174 is allowed, and the hook 178 returns to the initial angle.

[0107] When the user places the steel bar tying machine 2 in a manner that the plurality of steel bars are located between the upper curling guide 90 and the lower curling guide 92 and pulls the trigger 28, the steel bar tying machine 2 performs a series of actions such as winding the metal wire around the plurality of steel bars by using the feeding mechanism 38, the braking mechanism 40 and the guiding mechanism 42, and cutting the metal wire by using the cutting mechanism 44 and the twisting mechanism 46, and twisting the metal wire wound around the plurality of steel bars.

[0108] In the reinforcing bar binding machine 2 of the present embodiment, an elastic cover 188 is provided on the outer surface of the storage mechanism 36 of the mounting portion 22a holding the reel cover 22, and an elastic cover 190 is provided on the cover holding portion 18a of the side cover housing 18 holding the mounting portion 22b of the reel cover 22. Both the elastic covers 188 and 190 are made of an elastic material such as an elastomer. Thus, even when the reinforcing bar binding machine 2 is laid flat, the elastic covers 188 and 190 serve as buffers, and the internal components of the reinforcing bar binding machine 2 can be protected from impact.

[0109] <Motor>

[0110] Figure 6 This is an exploded perspective view of the feed motor 100 according to the present embodiment as viewed from the lower right front. Figure 7 1 is an exploded perspective view of the feed motor 100 of the present embodiment as viewed from the upper right front. The feed motor 100 generates a rotational force. The feed motor 100 is an electric motor. The feed motor 100 is an inner rotor type brushless motor. The feed motor 100 has a stator 101, a rotor 102, and a rotor shaft 103. The stator 101 is arranged around the rotor 102. The rotor 102 is arranged around the rotor shaft 103. The rotor shaft 103 is fixed to the rotor 102. The rotor 102 and the rotor shaft 103 rotate relative to the stator 101. The rotor 102 and the rotor shaft 103 rotate around a rotation axis extending in the up-down direction.

[0111] The stator 101 has a stator core 104, an insulator 112, and a coil 105. The stator core 104 has a circular yoke and a plurality of teeth protruding radially inward from the inner circumference of the yoke. The stator core 104 is arranged at a position radially outward from the rotor 102. The stator core 104 includes a plurality of stacked steel plates. The steel plate is a metal plate with iron as the main component. The stator core 104 is cylindrical. The teeth of the stator core 104 support the coil 105. In this embodiment, six teeth are provided.

[0112] The coil 105 is mounted on the stator core 104 via an insulator 112. A plurality of coils 105 are provided. The coil 105 is wound around the teeth of the stator core 104 via the insulator 112. The insulator 112 is an electrical insulating member made of synthetic resin. The coil 105 and the stator core 104 are electrically insulated by the insulator 112. The plurality of coils 105 are connected via a bus bar and a terminal 106 (welding terminal). In the present embodiment, six coils 105 are provided. Two coils 105 are assigned to the U-phase coil, two coils 105 are assigned to the V-phase coil, and two coils 105 are assigned to the W-phase coil. Three terminals 106 are provided. The first terminal 106 connects a pair of U-phase coils. The second terminal 106 connects a pair of V-phase coils. The third terminal 106 connects a pair of W-phase coils. In the present embodiment, the three terminals 106 are arranged at the rear of the stator core 104. The three terminals 106 are arranged side by side in the left-right direction.

[0113] The rotor 102 has a rotor core 107, a rotor magnet 108, and a balance correction plate 113. The rotor core 107 and the rotor shaft 103 are respectively made of steel. The rotor shaft 103 is arranged in a through hole provided at the center of the rotor core 107. The rotor core 107 and the rotor shaft 103 are fixed. The upper part of the rotor shaft 103 protrudes upward from the upper end surface of the rotor core 107. An output pinion 114 is fixed to the upper part of the rotor shaft 103. The rotational force of the rotor shaft 103 is output via the output pinion 114. The lower part of the rotor shaft 103 protrudes downward from the lower end surface of the rotor core 107. The rotor magnet 108 is fixed to the rotor core 107. The rotor magnet 108 is arranged inside the magnet hole provided in the rotor core 107. In the present embodiment, four rotor magnets 108 are arranged in the circumferential direction of the rotor core 107. The balance correction plate 113 is fixed to the upper end surface of the rotor core 107. The balance correction plate 113 is made of brass and corrects the rotation balance of the rotor 102 to improve the rotation balance of the rotor 102 .

[0114] A sensor substrate 109 is mounted on the stator 101. The sensor substrate 109 includes a circular circuit board portion 109A facing the lower end surface of the rotor core 107 and a support portion 109B connected to the rear portion of the stator core 104. A magnetic sensor 110 is arranged on the circuit board portion 109A. At least a portion of the circuit board portion 109A faces the rotor magnet 108. The magnetic sensor 110 detects the position of the rotor magnet 108 based on the magnetic flux, thereby detecting the position of the rotor 102 in the rotation direction.

[0115] A fan 111 is fixed to the upper end of the rotor shaft 103. When the rotor shaft 103 rotates, the fan 111 rotates together with the rotor shaft 103. By rotating the fan 111, an air flow for cooling the feed motor 100 is generated.

[0116] Figure 8 This is an exploded perspective view of the twist motor 200 according to the present embodiment as viewed from the upper left rear. Fig. 9 This is an exploded perspective view of the twisted motor 200 of this embodiment as viewed from the upper left front. The twisted motor 200 generates a rotational force. The twisted motor 200 is an electric motor. The twisted motor 200 is an inner rotor type brushless motor. The twisted motor 200 has a stator 201, a rotor 202, and a rotor shaft 203. The stator 201 is arranged around the rotor 202. The rotor 202 is arranged around the rotor shaft 203. The rotor shaft 203 is fixed to the rotor 202. The rotor 202 and the rotor shaft 203 rotate relative to the stator 201. The rotor 202 and the rotor shaft 203 rotate around the rotation axis extending in the front-rear direction.

[0117] The stator 201 has a stator core 204, an insulator 212, and a coil 205. The stator core 204 has a circular yoke and a plurality of teeth protruding radially inward from the inner circumference of the yoke. The stator core 204 is arranged at a position radially outward from the rotor 202. The stator core 204 includes a plurality of stacked steel plates. The steel plate is a metal plate with iron as the main component. The stator core 204 is cylindrical. The teeth of the stator core 204 support the coil 205.

[0118] In this embodiment, there are 6 teeth.

[0119] The coil 205 is mounted on the stator core 204 via an insulator 212. A plurality of coils 205 are provided. The coil 205 is wound around the teeth of the stator core 204 via the insulator 212. The insulator 212 is an electrical insulating member made of synthetic resin. The coil 205 and the stator core 204 are electrically insulated by the insulator 212. The plurality of coils 205 are connected via a bus bar and a terminal 206 (welding terminal). In the present embodiment, six coils 205 are provided. Two coils 205 are assigned to the U-phase coil, two coils 205 are assigned to the V-phase coil, and two coils 205 are assigned to the W-phase coil. Three terminals 206 are provided. The first terminal 206 connects a pair of U-phase coils. The second terminal 206 connects a pair of V-phase coils. The third terminal 206 connects a pair of W-phase coils. In the present embodiment, the three terminals 206 are arranged at the lower part of the stator core 204. The three terminals 206 are arranged side by side in the left-right direction.

[0120] The rotor 202 has a rotor core 207, a rotor magnet 208, and a balance correction plate 213. The rotor core 207 and the rotor shaft 203 are respectively made of steel. The rotor shaft 203 is arranged in a through hole provided at the center of the rotor core 207. The rotor core 207 and the rotor shaft 203 are fixed. The front part of the rotor shaft 203 protrudes forward from the front end surface of the rotor core 207. An output pinion 214 is fixed to the front part of the rotor shaft 203. The rotational force of the rotor shaft 203 is output via the output pinion 214. The rear part of the rotor shaft 203 protrudes rearward from the rear end surface of the rotor core 207. The rotor magnet 208 is fixed to the rotor core 207. The rotor magnet 208 is arranged inside the magnet hole provided in the rotor core 207. In the present embodiment, four rotor magnets 208 are arranged in the circumferential direction of the rotor core 207. The balance correction plate 213 is fixed to the front end surface of the rotor core 207. The balance correction plate 213 is made of brass. The balance correction plate 213 corrects the rotational balance of the rotor 202 to improve the rotational balance of the rotor 202 .

[0121] A sensor substrate 209 is mounted on the stator 201. The sensor substrate 209 includes a circular circuit board portion 209A facing the rear end surface of the rotor core 207 and a support portion 209B connected to the lower portion of the stator core 204. A magnetic sensor 210 is arranged on the circuit board portion 209A. At least a portion of the circuit board portion 209A faces the rotor magnet 208. The magnetic sensor 210 detects the position of the rotor magnet 208 based on the magnetic flux, thereby detecting the position of the rotor 202 in the rotation direction.

[0122] A fan 211 is fixed to the front of the rotor shaft 203. When the rotor shaft 203 rotates, the fan 211 rotates together with the rotor shaft 203. By rotating the fan 211, an air flow for cooling the twist motor 200 is generated.

[0123] <Controller>

[0124] Fig.10 It is a front view showing the controller 300 of this embodiment. Fig.11 Controller 300 of this embodiment is a rear view. Controller 300 includes circuit board 301, first control circuit 310 mounted on circuit board 301, and second control circuit 320 mounted on circuit board 301. First control circuit 310 controls feed motor 100. Second control circuit 320 controls twisting motor 200.

[0125] The circuit board 301 is in the shape of a long plate extending in a predetermined direction. The circuit board 301 has a first surface 301A and a second surface 301B facing in the opposite direction of the first surface 301A. The first control circuit 310 and the second control circuit 320 are mounted on the first surface 301A of the circuit board 301, respectively.

[0126] The first control circuit 310 includes a microcomputer 311, a gate drive circuit 312, an inverter circuit 313, and a capacitor 314. The microcomputer 311 includes a processor such as a CPU (Central Processing Unit), a non-volatile memory such as a ROM (Read Only Memory), and a volatile memory such as a RAM (Random Access Memory). The inverter circuit 313 supplies a drive current to the coil 205 based on the power supplied from the battery 10. The inverter circuit 313 has 6 switching elements. The switching element includes a field effect transistor (FET: Field Effect Transistor). In addition, the switching element can be an IGBT or a MOSFET. The gate drive circuit 312 is a drive circuit that drives the switching element of the inverter circuit 313. The microcomputer 311 outputs a control signal to the gate drive circuit 312 to drive the switching element of the inverter circuit 313. The capacitor 314 is provided to reduce the noise when the switching element is switched. The capacitor 314 is provided to reduce the inductance when the battery 10 is mounted on the leg portion 8 .

[0127] The second control circuit 320 includes a microcomputer 321, a gate drive circuit 322, an inverter circuit 323, and a capacitor 324. The structure and function of the microcomputer 321 are substantially the same as the structure and function of the microcomputer 311. The structure and function of the gate drive circuit 322 are substantially the same as the structure and function of the gate drive circuit 312. The structure and function of the inverter circuit 323 are substantially the same as the structure and function of the inverter circuit 313. The structure and function of the capacitor 324 are substantially the same as the structure and function of the capacitor 314. The description of the microcomputer 321, the gate drive circuit 322, the inverter circuit 323, and the capacitor 324 is omitted.

[0128] <Controller Configuration>

[0129] Fig.12 : is a diagram schematically showing an example of the configuration of the controller 300 of the present embodiment. The controller 300 is configured on the handle portion 6. The controller 300 is configured on the handle portion 6 in a manner that the circuit board 301 extends in the up-down direction. The controller 300 is configured on the handle portion 6 in a manner that the first surface 301A of the circuit board 301 on which the first control circuit 310 and the second control circuit 320 are mounted faces the left. In addition, the controller 300 may be configured on the handle portion 6 in a manner that the first surface 301A of the circuit board 301 faces the left.

[0130] The feed motor 100 and the twist motor 200 are arranged above the controller 300. The feed motor 100 and the twist motor 200 are arranged in the head 4. In the head 4, the feed motor 100 is arranged in front of the twist motor 200.

[0131] The feed motor 100 is arranged in such a manner that the rotation axis of the rotor 102 and the rotor shaft 103 extends in the up-down direction. The fan 111 is arranged above the stator 101. The terminal 106 for connecting the plurality of coils of the stator 101 is arranged at the rear of the stator 101. The sensor substrate 109 for detecting the rotation of the rotor 102 is arranged below the stator 101. The terminal 106 and the controller 300 are connected via the power cable 401. As described above, three terminals 106 are provided. One terminal 106 and the controller 300 are connected via one power cable 401. Three power cables 401 are provided. Five signal cables 402 are provided.

[0132] The twisted motor 200 is configured in such a manner that the rotation axis of the rotor 202 and the rotor shaft 203 extends in the front-to-back direction. The fan 211 is configured in a position forward of the stator 201. The terminal 206 that connects the plurality of coils of the stator 201 is configured in a lower portion of the stator 201. The sensor substrate 209 that detects the rotation of the rotor 202 is configured in a position backward of the stator 201. The terminal 206 and the controller 300 are connected via the power cable 403. As described above, three terminals 206 are provided. One terminal 206 and the controller 300 are connected via one power cable 403. Three power cables 403 are provided. Five signal cables 404 are provided.

[0133] The controller 300 and the battery terminal of the battery 10 are connected by a power supply cable 405. Two power supply cables 405 are provided. Electric power is output from the battery 10 to the controller 300 via the power supply cables 405.

[0134] The controller 300 and the trigger 28 (trigger switch 34) are connected via a signal cable 406. One signal cable 406 is provided. The trigger switch 34 (see Figure 4 ) The operation signal generated is sent from the trigger switch 34 to the controller 300 via the signal cable 406.

[0135] The first control circuit 310 supplies power from the battery 10 to the terminal 106 via the power cable 401. The power supplied to the terminal 106 is supplied to the coil 105 of the feed motor 100. By supplying power to the coil 105 of the feed motor 100, the rotor 102 of the feed motor 100 rotates. A detection signal of the sensor substrate 109 that detects the rotation of the rotor 102 is input to the first control circuit 310 via the signal cable 402. The first control circuit 310 controls the power supplied to the coil 105 of the feed motor 100 based on the detection signal from the sensor substrate 109.

[0136] The second control circuit 320 supplies power from the battery 10 to the terminal 206 via the power cable 403. The power supplied to the terminal 206 is supplied to the coil 205 of the twisting motor 200. By supplying power to the coil 205 of the twisting motor 200, the rotor 202 of the twisting motor 200 rotates. A detection signal of the sensor substrate 209 that detects the rotation of the rotor 202 is input to the second control circuit 320 via the signal cable 404. The second control circuit 320 controls the power supplied to the coil 205 of the twisting motor 200 based on the detection signal from the sensor substrate 209.

[0137] <Effect>

[0138] As described above, in the embodiment, the reinforcing bar binding machine 2 includes: the feed motor 100 as a first brushless motor that feeds the metal wire wound on the drum 24; the twisting motor 200 as a second brushless motor that twists the metal wire fed by the feed motor 100; the head 4 on which the drum 24, the feed motor 100 and the twisting motor 200 are arranged; the handle 6 that extends downward from the head 4; the foot 8 that is arranged below the handle 6 and is connected to the battery 10; and the controller 300 that controls the feed motor 100 and the twisting motor 200. The controller 300 is arranged on the handle 6.

[0139] In the above-mentioned structure, in the reinforcing bar tying machine 2, the controller 300 is arranged at an appropriate position.

[0140] [Second embodiment]

[0141] In the following description, the same reference numerals are given to the same or equivalent components as those in the above-mentioned embodiment, and the description of the components is simplified or omitted.

[0142] Fig.13 Schematic diagram of a configuration example of the controller 300 of this embodiment. Fig.13In the example shown, the controller 300 is arranged in the head 4. In the head 4, the controller 300 is arranged at a position lower than the feed motor 100 and the twisting motor 200. The controller 300 is arranged in the head 4 in a manner that the circuit board 301 extends in the front-back direction. The controller 300 is arranged in the head 4 in a manner that the first surface 301A of the circuit board 301 on which the first control circuit 310 and the second control circuit 320 are mounted faces the left. In addition, the controller 300 may be arranged in the head 4 in a manner that the first surface 301A of the circuit board 301 faces the right.

[0143] A first control circuit 310 including a gate drive circuit 312 and an inverter circuit 313 for controlling the feed motor 100 is mounted on the front side of the circuit board 301. A second control circuit 320 including a gate drive circuit 322 and an inverter circuit 323 for controlling the twisting motor 200 is mounted on the rear side of the circuit board 301.

[0144] As described above, in the embodiment, when the twisting motor 200 is arranged at a position behind the feed motor 100, the first control circuit 310 for controlling the feed motor 100 is mounted on the front side of the circuit board 301, and the second control circuit 320 for controlling the twisting motor 200 is mounted on the rear side of the circuit board 301. Thus, the lengths of the power cable 401, the signal cable 402, the power cable 403, and the signal cable 404 can be shortened.

[0145] [Third Embodiment]

[0146] In the following description, the same reference numerals are given to the same or equivalent components as those in the above-described embodiment, and the description of the components is simplified or omitted.

[0147] Fig.14 Schematic diagram of a configuration example of the controller 300 of this embodiment. Fig.14 In the example shown, the controller 300 is arranged in the head 4. In the head 4, the controller 300 is arranged at a position lower than the feed motor 100 and the twisting motor 200. The controller 300 is arranged in the head 4 in a manner that the circuit board 301 extends in the front-back direction. The controller 300 is arranged in the head 4 in a manner that the first surface 301A of the circuit board 301 on which the first control circuit 310 and the second control circuit 320 are mounted faces upward. In addition, the controller 300 may be arranged in the head 4 in a manner that the first surface 301A of the circuit board 301 faces downward.

[0148] A first control circuit 310 including a gate drive circuit 312 and an inverter circuit 313 for controlling the feed motor 100 is mounted on the front side of the circuit board 301. A second control circuit 320 including a gate drive circuit 322 and an inverter circuit 323 for controlling the twisting motor 200 is mounted on the rear side of the circuit board 301.

[0149] As described above, in the embodiment, when the twisting motor 200 is arranged at a position behind the feed motor 100, the first control circuit 310 for controlling the feed motor 100 is mounted on the front side of the circuit board 301, and the second control circuit 320 for controlling the twisting motor 200 is mounted on the rear side of the circuit board 301. Thus, the lengths of the power cable 401, the signal cable 402, the power cable 403, and the signal cable 404 can be shortened.

[0150] [Fourth embodiment]

[0151] In the following description, the same reference numerals are given to the same or equivalent components as those in the above-mentioned embodiment, and the description of the components is simplified or omitted.

[0152] Fig.15 Schematic diagram of a configuration example of the controller 3000 of this embodiment. Fig.15 In the example shown, the controller 3000 is disposed on the grip portion 6. The circuit board 3010 of the controller 3000 has a holding portion 330 for holding the trigger 28. The trigger 28 is directly held on the circuit board 3010 of the controller 3000 via the holding portion 330. The controller 3000 is an integrated controller integrated with the trigger 28. In this embodiment, the signal cable 406 can be omitted.

[0153] [Fifth embodiment]

[0154] In the following description, the same reference numerals are given to the same or equivalent components as those in the above-described embodiment, and the description of the components is simplified or omitted.

[0155] Fig.16 : is a diagram schematically showing an example of the configuration of the controller 300 of the present embodiment. In the fifth embodiment, at least one of the feed motor 100 (first brushless motor) and the twisting motor 200 (second brushless motor) has a sensor substrate for detecting the rotation of the rotor, and the sensor substrate has an inverter circuit for driving the motor. Fig.16 , an example is shown in which inverter circuits 313 and 323 are provided on both the sensor substrate 109 of the feed motor 100 and the sensor substrate 209 of the twist motor 200 .

[0156] exist Fig.16 In the example shown, the controller 300 is arranged on the handle portion 6. The controller 300 is connected to the sensor substrate 109 of the feed motor 100 through both the power cable 401 and the signal cable 402. The controller 300 is electrically connected to the stator 101 of the feed motor 100 via the sensor substrate 109. The controller 300 is connected to the sensor substrate 209 of the twisting motor 200 through both the power cable 403 and the signal cable 404. The controller 300 is electrically connected to the stator 201 of the twisting motor 200 via the sensor substrate 209.

[0157] Fig.17 This is an exploded perspective view of the feed motor 100 according to the present embodiment as viewed from the lower right front. Fig.18 This is an exploded perspective view of the feed motor 100 according to the present embodiment as viewed from the upper right front.

[0158] The sensor substrate 109 is mounted on the stator 101. The circuit board portion 109A of the sensor substrate 109 is provided with not only a magnetic sensor 110 but also an inverter circuit 313. The inverter circuit 313 is provided on the lower surface of the sensor substrate 109. The inverter circuit 313 includes 6 switching elements that control the supply of current to the U-phase coil, the V-phase coil, and the W-phase coil, respectively. The inverter circuit 313 is connected to the controller 300 (gate drive circuit 312) via a power cable 401 and a signal cable 402 connected to the sensor substrate 109. The inverter circuit 313 is connected to each coil 105 (U-phase coil, V-phase coil, W-phase coil) of the stator 101 through wiring not shown from the sensor substrate 109. Therefore, in Fig.17 and Fig.18 In the example, the terminal 106 for supplying power to each coil 105 is not provided (refer to Figure 7 ).

[0159] Fig.19 This is an exploded perspective view of the twist motor 200 according to the present embodiment as viewed from the upper left rear. Fig. 20 This is an exploded perspective view of the twist motor 200 according to the present embodiment as viewed from the upper left front.

[0160] A sensor substrate 209 is mounted on the stator 201. The circuit board portion 209A of the sensor substrate 209 is provided with not only a magnetic sensor 210 but also an inverter circuit 323. The inverter circuit 323 is provided on the rear surface of the sensor substrate 209. The inverter circuit 323 includes 6 switching elements that control the supply of current to the U-phase coil, the V-phase coil, and the W-phase coil, respectively. The inverter circuit 323 is connected to the controller 300 (gate drive circuit 322) via a power cable 403 and a signal cable 404 connected to the sensor substrate 209. The inverter circuit 323 is connected to each coil 205 (U-phase coil, V-phase coil, W-phase coil) of the stator 201 through wiring not shown from the sensor substrate 209. Therefore, in Fig.19 and Fig. 20 In the example, the terminal 206 for supplying power to each coil 205 is not provided (see Figure 7 ).

[0161] Fig.21 Controller 300 of this embodiment is a front view. Controller 300 includes a first control circuit 310 for controlling feed motor 100 and a second control circuit 320 for controlling twisting motor 200. First control circuit 310 and second control circuit 320 are mounted on first surface 301A of circuit board 301, respectively.

[0162] The first control circuit 310 includes a microcomputer 311, a gate drive circuit 312, and a capacitor 314. In this embodiment, since the inverter circuit 313 is provided on the sensor substrate 109, the inverter circuit 313 is not provided in the controller 300 (first control circuit 310). The gate drive circuit 312 drives the inverter circuit 313 of the sensor substrate 109 via the signal cable 402.

[0163] The second control circuit 320 includes a microcomputer 321, a gate drive circuit 322, and a capacitor 324. In this embodiment, since the inverter circuit 323 is provided on the sensor substrate 209, the inverter circuit 323 is not provided in the controller 300 (the second control circuit 320). The gate drive circuit 322 drives the inverter circuit 323 of the sensor substrate 209 via the signal cable 404.

[0164] In the fifth embodiment, the motor drive inverter circuit 313 is provided on the sensor substrate 109 of the feed motor 100 (first brushless motor), and the motor drive inverter circuit 323 is provided on the sensor substrate 209 of the twist motor 200 (second brushless motor), but the inverter circuit may be provided on only one of the sensor substrates. In addition, a part of the inverter circuit may be provided on the controller 300.

[0165] As described above, the controller 300 is disposed on the handle portion 6. Thus, in the reinforcing bar tying machine 2, the controller 300 is disposed at an appropriate position.

[0166] In the embodiment, the feed motor 100 as the first brushless motor has a sensor substrate 109 as the first sensor substrate for detecting the rotation of the rotor 102. The sensor substrate 109 has an inverter circuit 313 for motor driving. Thus, the connection of the power cable 401 for supplying driving current to the feed motor 100 and the signal cable 402 for signal transmission can be integrated into the sensor substrate 109. It is not necessary to provide a terminal for connecting the power cable 401 on the feed motor 100. Since it is not easy to be subject to the configuration restrictions associated with the wiring process, the freedom of configuration of the controller 300 is improved.

[0167] In the embodiment, the twisted motor 200 as the second brushless motor has a sensor substrate 209 as the second sensor substrate for detecting the rotation of the rotor 202. The sensor substrate 209 has an inverter circuit 323 for driving the motor. Thus, the connection of the power cable 403 for supplying the driving current to the twisted motor 200 and the signal cable 404 for signal transmission can be integrated into the sensor substrate 209. It is not necessary to provide a terminal for connecting the power cable 403 in the twisted motor 200. Since it is not easy to be subject to the configuration restrictions associated with the wiring process, the degree of freedom of configuration of the controller 300 is improved.

[0168] [Sixth embodiment]

[0169] In the following description, the same reference numerals are given to the same or equivalent components as those in the above-mentioned embodiment, and the description of the components is simplified or omitted.

[0170] Fig. 22 Schematic diagram of a configuration example of the controller 300 of this embodiment. Fig. 22 In the example shown, the controller 300 is arranged in the head 4. In the head 4, the controller 300 is arranged at a position lower than the feed motor 100 and the twisting motor 200. The controller 300 is arranged in the head 4 in a manner that the circuit board 301 extends in the front-back direction. The controller 300 is arranged in the head 4 in a manner that the first surface 301A of the circuit board 301 on which the first control circuit 310 and the second control circuit 320 are mounted faces the left. In addition, the controller 300 may be arranged in the head 4 in a manner that the first surface 301A of the circuit board 301 faces the right.

[0171] The sensor substrate 109 is arranged at a position below the stator 101 of the feed motor 100. The first control circuit 310 including the gate drive circuit 312 for controlling the feed motor 100 is mounted on the front side of the circuit board 301. The first control circuit 310 is arranged at a position close to the sensor substrate 109 in the circuit board 301. The sensor substrate 109 is arranged above the first control circuit 310. The sensor substrate 109 is provided with an inverter circuit 313 for controlling the feed motor 100. Therefore, the inverter circuit 313 is not provided in the first control circuit 310.

[0172] The sensor substrate 209 is arranged at a position behind the stator 201 of the twisted motor 200. The second control circuit 320 including the gate drive circuit 322 for controlling the twisted motor 200 is mounted on the rear side of the circuit board 301. The second control circuit 320 is arranged at a position close to the sensor substrate 209 of the circuit board 301. The sensor substrate 209 is arranged above the second control circuit 320. The sensor substrate 209 is provided with an inverter circuit 323 for controlling the twisted motor 200. Therefore, the inverter circuit 323 is not provided in the second control circuit 320.

[0173] The first surface 301A of the circuit board 301 and the sensor substrate 109 are connected through a power cable 401 and a signal cable 402. The sensor substrate 109 and the stator 101 are connected through wiring. The inverter circuit 313 is driven by the gate drive circuit 312 to supply the power from the power cable 401 to each coil 105 (U-phase coil, V-phase coil, W-phase coil) of the feed motor 100 via the wiring of the sensor substrate 109. The first surface 301A of the circuit board 301 and the sensor substrate 209 are connected through a power cable 403 and a signal cable 404. The sensor substrate 209 and the stator 201 are connected through wiring. The inverter circuit 323 is driven by the gate drive circuit 322 to supply the power from the power cable 403 to each coil 205 (U-phase coil, V-phase coil, W-phase coil) of the twisted motor 200 via the wiring of the sensor substrate 209.

[0174] As described above, the twisting motor 200 is arranged at a position behind the feed motor 100. The inverter circuit 313 for controlling the feed motor 100 is provided on the sensor substrate 109. The inverter circuit 323 for controlling the twisting motor 200 is provided on the sensor substrate 209. In addition, the first surface 301A of the circuit board 301 and the sensor substrate 109 of the feed motor 100 are connected through the power cable 401 and the signal cable 402. The first surface 301A of the circuit board 301 and the sensor substrate 209 of the twisting motor 200 are connected through the power cable 403 and the signal cable 404. In addition, the first control circuit 310 for controlling the feed motor 100 is installed at a position on the front side of the circuit board 301. The second control circuit 320 for controlling the twisting motor 200 is installed at a position on the rear side of the circuit board 301. As a result, the lengths of the power cable 401, the signal cable 402, the power cable 403, and the signal cable 404 can be shortened.

[0175] [Seventh embodiment]

[0176] In the following description, the same reference numerals are given to the same or equivalent components as those in the above-mentioned embodiment, and the description of the components is simplified or omitted.

[0177] Fig.23 Schematic diagram of a configuration example of the controller 300 of this embodiment. Fig.23 In the example shown, the controller 300 is arranged in the head 4. In the head 4, the controller 300 is arranged at a position lower than the feed motor 100 and the twisting motor 200. The controller 300 is arranged in the head 4 in a manner that the circuit board 301 extends in the front-back direction. The controller 300 is arranged in the head 4 in a manner that the first surface 301A of the circuit board 301 on which the first control circuit 310 and the second control circuit 320 are mounted faces upward. In addition, the controller 300 may be arranged in the head 4 in a manner that the first surface 301A of the circuit board 301 faces downward.

[0178] The sensor substrate 109 is arranged below the stator 101 of the feed motor 100. The first control circuit 310 including the gate drive circuit 312 for controlling the feed motor 100 is mounted on the front side of the circuit board 301. The first control circuit 310 is arranged closer to the sensor substrate 109 than the second control circuit 320. The sensor substrate 109 is arranged below the first control circuit 310, and the sensor substrate 109 and the first control circuit 310 are arranged in the vertical direction. The sensor substrate 109 is provided with an inverter circuit 313 for controlling the feed motor 100. Therefore, the inverter circuit 313 is not provided in the first control circuit 310.

[0179] The sensor substrate 209 is arranged at a position behind the stator 201 of the twist motor 200. The second control circuit 320 including the gate drive circuit 322 for controlling the twist motor 200 is mounted on the rear side of the circuit board 301. The second control circuit 320 is arranged at a position closer to the sensor substrate 209 than the first control circuit 310. The sensor substrate 209 is arranged above the second control circuit 320, and the sensor substrate 209 and the second control circuit 320 are arranged in an upper and lower direction. The sensor substrate 209 is provided with an inverter circuit 323 for controlling the twist motor 200. Therefore, the inverter circuit 323 is not provided in the second control circuit 320.

[0180] The first surface 301A of the circuit board 301 and the sensor substrate 109 are connected via a power cable 401 and a signal cable 402. The first surface 301A of the circuit board 301 and the sensor substrate 209 are connected via a power cable 403 and a signal cable 404.

[0181] As described above, the twisting motor 200 is arranged at a position behind the feed motor 100. In addition, the sensor substrate 109 is provided with an inverter circuit 313 for controlling the feed motor 100. The sensor substrate 209 is provided with an inverter circuit 323 for controlling the twisting motor 200. In addition, the first surface 301A of the circuit board 301 and the sensor substrate 109 are connected by the power cable 401 and the signal cable 402. The first surface 301A of the circuit board 301 and the sensor substrate 209 are connected by the power cable 403 and the signal cable 404. In addition, the first control circuit 310 for controlling the feed motor 100 is installed at a position closer to the sensor substrate 109 than the second control circuit 320. The second control circuit 320 for controlling the twisting motor 200 is installed at a position closer to the sensor substrate 209 than the first control circuit 310. As a result, the lengths of the power cable 401, the signal cable 402, the power cable 403, and the signal cable 404 can be shortened.

[0182] [Eighth embodiment]

[0183] In the following description, the same reference numerals are given to the same or equivalent components as those in the above-mentioned embodiment, and the description of the components is simplified or omitted.

[0184] Fig.24 Schematic diagram of a configuration example of the controller 3000 of this embodiment. Fig.24In the example shown, the controller 3000 is disposed on the grip portion 6. The circuit board 3010 of the controller 3000 has a holding portion 330 for holding the trigger 28. The trigger 28 is directly held on the circuit board 3010 of the controller 3000 via the holding portion 330. The controller 3000 is an integrated controller integrated with the trigger 28. In this embodiment, the signal cable 406 can be omitted.

[0185] The feed motor 100 is provided with a sensor substrate 109. The sensor substrate 109 is provided with an inverter circuit 313 for controlling the feed motor 100. Therefore, the inverter circuit 313 is not provided in the first control circuit 310. The twisting motor 200 is provided with a sensor substrate 209. The sensor substrate 209 is provided with an inverter circuit 323 for controlling the twisting motor 200. Therefore, the inverter circuit 323 is not provided in the second control circuit 320.

[0186] The circuit board 3010 and the sensor substrate 109 are connected by a power cable 401 and a signal cable 402. The controller 3000 drives and controls the feed motor 100 via the sensor substrate 109. The circuit board 3010 and the sensor substrate 209 are connected by a power cable 403 and a signal cable 404. The controller 3000 drives and controls the twisting motor 200 via the sensor substrate 209.

[0187] As described above, the sensor substrate 109 is provided with the inverter circuit 313 for controlling the feed motor 100. The sensor substrate 209 is provided with the inverter circuit 323 for controlling the twisting motor 200. Thus, by providing the inverter circuits 313 and 323 on the sensor substrates 109 and 209 for detecting the rotation of the rotor, the inverter circuits 313 and 323 can be omitted from the circuit board 3010 of the controller 3000. Since the configuration is not easily restricted by the wiring process, the freedom of configuration of the controller 300 is improved.

[0188] [Ninth embodiment]

[0189] A ninth embodiment will be described. In the following description, the same reference numerals are given to components that are the same as or equivalent to those in the above-described embodiment, and description of the components will be simplified or omitted.

[0190] Fig.25 3 is a diagram schematically showing an example of the configuration of the controller 3001 of the present embodiment. The controller 3001 is configured on the leg 8. The controller 3001 is configured on the leg 8 in a manner that the circuit board 3011 extends in the front-rear direction. The controller 3001 is configured on the leg 8 in a manner that the first surface 3011A of the circuit board 3011 on which the first control circuit 310 and the second control circuit 320 are mounted faces upward.

[0191] The feed motor 100 is provided with a sensor substrate 109. The sensor substrate 109 is provided with an inverter circuit 313 for controlling the feed motor 100. Therefore, the inverter circuit 313 is not provided in the first control circuit 310. The twisting motor 200 is provided with a sensor substrate 209. The sensor substrate 209 is provided with an inverter circuit 323 for controlling the twisting motor 200. Therefore, the inverter circuit 323 is not provided in the second control circuit 320.

[0192] The circuit board 3011 and the sensor substrate 109 are connected by a power cable 401 and a signal cable 402. The controller 3001 drives and controls the feed motor 100 via the sensor substrate 109. The circuit board 3011 and the sensor substrate 209 are connected by a power cable 403 and a signal cable 404. The controller 3001 drives and controls the twisting motor 200 via the sensor substrate 209.

[0193] In the ninth embodiment, the controller 3001 includes a circuit board 3011, a controller housing 3020 that houses the circuit board 3011, and a terminal 3030 that connects the battery 10 and the circuit board 3011. In the ninth embodiment, the controller 3001 (circuit board 3011) is directly connected to the battery 10 via the terminal 3030. Therefore, in this embodiment, the power supply cable 405 can be omitted.

[0194] The controller housing 3020 has a flat disk or tray shape with a concave upper surface. The controller housing 3020 accommodates the circuit board 3011 inside the concave portion. The controller housing 3020 is accommodated in the housing 12 constituting the leg 8. The lower surface of the controller housing 3020 constitutes a part of the connection surface of the leg 8 connected to the battery 10. The terminal 3030 for connecting to the battery 10 is provided on the second surface 3011B of the circuit board 3011. The lower surface of the controller housing 3020 exposes a part of the terminal 3030 so that it can be connected to the terminal of the battery 10. A guide 3040 can be formed on the lower surface of the controller housing 3020. The guide 3040 partially covers the terminal 3030 to protect the terminal 3030 from the outside, and guides the battery 10 when the terminal of the battery 10 is connected to the terminal 3030. When the battery 10 is connected, the lower surface of the controller housing 3020 , the terminal 3030 , and the guide 3040 are covered by the housing of the battery 10 and are not exposed to the outside.

[0195] As described above, in the embodiment, the steel bar tying machine 2 includes: a feed motor 100 as a first brushless motor, which feeds a metal wire wound on a reel 24; a twisting motor 200 as a second brushless motor, which twists the metal wire; a head 4, on which the reel 24, the feed motor 100 and the twisting motor 200 are arranged; a handle 6, which extends downward from the head 4; a foot 8, which is arranged below the handle 6, and the foot 8 is connected to the battery 10; and a controller 3001, which controls the feed motor 100 and the twisting motor 200, and the controller 3001 is arranged on the foot 8, and the controller 3001 has a circuit board 3011, a controller housing 3020 for storing the circuit board 3011, and a terminal 3030 for connecting the battery 10 and the circuit board 3011.

[0196] In the above-mentioned structure, the controller 3001 is arranged at an appropriate position in the reinforcing bar binding machine 2. The power supply cable 405 can be omitted, and the structure inside the device can be simplified.

[0197] [10th embodiment]

[0198] In the following description, the same reference numerals are given to the same or equivalent components as those in the above-mentioned embodiment, and the description of the components is simplified or omitted.

[0199] Fig.26 3 is a diagram schematically showing an example of the configuration of the controller 300 of this embodiment. In the tenth embodiment, a wireless communication unit 500, a heat sink (315, 325) and a noise removal member 510 are further provided in addition to the configuration shown in the first embodiment.

[0200] The wireless communication unit 500 is arranged in the handle portion 6. The wireless communication unit 500 is arranged in the handle portion 6 in a manner overlapping with the circuit board 301 of the controller 300 in the left-right direction. The wireless communication unit 500 is arranged on the left side of the circuit board 301 in the handle portion 6. The wireless communication unit 500 is arranged between the circuit board 301 and the left housing 14. The wireless communication unit 500 may also be arranged on the right side of the circuit board 301 in the handle portion 6. For example, the wireless communication unit 500 is arranged between the circuit board 301 and the right housing 16.

[0201] Alternatively, the wireless communication unit 500 can be detachably mounted on the housing 12. For example, a structure may be as follows: an assembly port for mounting the wireless communication unit 500 is formed on the outer surface of the left housing 14 (or the outer surface of the right housing 16), and the wireless communication unit 500 is mounted on the assembly port from the outside of the housing 12. In the case of this structure, the wireless communication unit 500 is assembled in the assembly port to establish an electrical connection with the controller 300. In addition, the wireless communication unit 500 may also be provided on the head 4, the foot 8, or the battery 10.

[0202] exist Fig.26 In the embodiment, the wireless communication unit 500 can be connected to the controller 300 by wire or directly mounted on the circuit board 301. The controller 300 supplies power from the battery 10 to the wireless communication unit 500. The controller 300 communicates with an external device via the wireless communication unit 500.

[0203] The wireless communication unit 500 has an interface circuit for wireless communication. The method of wireless communication is not particularly limited. The wireless communication unit 500 communicates, for example, through short-range wireless communication such as Bluetooth (registered trademark), WLAN communication such as Wi-Fi (registered trademark), microwave, infrared (optical signal), mobile communication system such as so-called 5G, etc. The wireless communication unit 500 can communicate with other communication terminals, such as computers, mobile devices, cloud servers, other electric tools such as steel bar tying machines, external battery cells, etc. through wireless communication. As an example, the wireless communication unit 500 communicates with a terminal (tablet-type terminal, PC, etc.) for managing electric tools owned by a user including the steel bar tying machine 2.

[0204] The controller 300 can send information of the rebar bundling machine 2 via the wireless communication unit 500. The information of the rebar bundling machine 2 may include, for example, information such as the remaining power of the battery 10, the voltage value, and the current value. The information of the rebar bundling machine 2 may include, for example, information or log data of each motor of the rebar bundling machine 2. The information of each motor may include motor speed, torque, rotation direction, etc. The information of the rebar bundling machine 2 may include the current setting content (operation mode, etc.) of the rebar bundling machine 2. The information of the rebar bundling machine 2 may include, for example, the cumulative value of the number of bundling times of the rebars, or the remaining amount of the metal wire wound on the reel 24 (remaining number of bundling times). In this case, the controller 300 may also count the number of bundling times of the rebars according to the driving information of the feeding motor 1000, and subtract the count value from the initial value of the number of bundling times set on the reel 24, thereby calculating the remaining number of bundling times. The controller 300 may periodically transmit the information of the reinforcing bar tying machine 2 to the set transmission destination, or may transmit the information of the reinforcing bar tying machine 2 as a response signal corresponding to a request from the transmission destination. The controller 300 can receive a control signal via the wireless communication unit 500. The control signal may include information for instructing to switch the power on / off of the reinforcing bar tying machine 2, information for instructing to change the operation mode, etc. The controller 300 controls each part of the reinforcing bar tying machine 2 according to the received control signal.

[0205] Fig. 27 : is a perspective schematic diagram showing the controller 300 of the present embodiment. The controller 300 includes a circuit board 301, and the circuit board 301 has an inverter circuit (313, 323) for driving a motor and a heat sink (315, 325) thermally connected to the inverter circuit. That is, the circuit board 301 includes a heat sink 315 thermally connected to the inverter circuit 313 of the first control circuit 310. The heat sink 315 is in contact with the surface of the switching element constituting the inverter circuit 313 via a thermally conductive material. The thermally conductive material is a thermally conductive lubricant, a thermally conductive adhesive, etc., and fills the gap between the surface of the heat sink 315 and the surface of the switching element. The heat sink 315 includes: a main body, which has a heat transfer surface in contact with a heat absorbing object such as a switching element; and a plurality of fins 315A, which stand up from the main body. The fins 315A have a plate shape, a pin shape, a lattice shape, etc., so that the heat dissipation area of ​​the heat sink 315 is increased. The heat sink 315 is made of a highly thermally conductive material such as aluminum (aluminum or aluminum alloy). One heat sink 315 may be provided for one switching element, or one heat sink 315 may be provided for multiple switching elements. The inverter circuit 313 may include, for example, one or two power modules encapsulating multiple switching elements. In this case, a heat sink 315 may be provided for each power module.

[0206] The circuit board 301 includes a heat sink 325 thermally connected to the inverter circuit 323 of the second control circuit 320. The heat sink 325 is in contact with the surface of the switching element constituting the inverter circuit 323 via a heat conductive material. The heat conductive material is a heat conductive lubricant, a heat conductive adhesive, etc., and fills the gap between the surface of the heat sink 325 and the surface of the switching element. The heat sink 325 includes: a main body having a heat transfer surface in contact with a heat absorbing object such as a switching element; and a plurality of fins 325A, which stand upright from the main body. The fins 325A increase the heat dissipation area of ​​the heat sink 325 through a plate-like, pin-like, lattice-like shape, etc. The heat sink 325 is made of a high heat conductive material such as aluminum (aluminum or aluminum alloy). One heat sink 325 can be provided for one switching element, or one heat sink 325 can be provided for multiple switching elements. The inverter circuit 323 can include, for example, one or two power modules that encapsulate multiple switching elements. In this case, a heat sink 325 may be provided for each power module.

[0207] The reinforcing bar binding machine 2 has a noise removing member 510 for removing electromagnetic noise on the power line connecting at least one of the feed motor 1000 (first brushless motor) and the twisting motor 2000 (second brushless motor) to the controller 300. The noise removing member 510 is provided in common with respect to a plurality of wirings. The noise removing member 510 is a plate-shaped member having a plurality of through holes 511 formed therein for the wirings to pass through. One wiring is passed through each through hole 511. Fig. 27 In the figure, the noise removing member 510 is an elliptical flat plate having three through holes 511 penetrating in the thickness direction. The three through holes 511 are arranged linearly along the long axis direction of the noise removing member 510 in a plan view. The noise removing member 510 is made of a ferromagnetic body. The noise removing member 510 is, for example, a permanent magnet.

[0208] exist Fig. 27 In the embodiment, two noise removing members 510 are provided. The first noise removing member 510 is provided on the power cable 401 that supplies power to the feeding motor 1000. The three power lines (the power lines of the U phase, the V phase, and the W phase) included in the power cable 401 are respectively passed through the three through holes 511 of the first noise removing member 510. The second noise removing member 510 is provided on the power cable 403 that supplies power to the twisting motor 2000. The three power lines (the power lines of the U phase, the V phase, and the W phase) included in the power cable 403 are respectively passed through the three through holes 511 of the second noise removing member 510.

[0209] Fig.28 This is an exploded perspective view of the feed motor 1000 according to the present embodiment as viewed from the lower right front. Fig.29 This is an exploded perspective view of the feed motor 1000 of this embodiment as viewed from the upper right front. Figure 6 , Figure 7 ) shows a feed motor 100 as an IPM (Interior Permanent Magnet) motor, in which a rotor magnet 108 of the feed motor 100 is arranged in a magnet hole provided in a rotor core 107, but Fig.28 , Fig.29 In the illustrated example, the feed motor 1000 is an SPM (Surface Permanent Magnet) motor in which a rotor magnet 1080 is disposed on the outer peripheral surface of a rotor core 1070 .

[0210] The rotor 1020 of the feed motor 1000 has a rotor core 1070, a rotor magnet 1080 and a retaining tube 1021. The rotor magnet 1080 is fixed to the rotor core 1070. The rotor magnet 1080 is arranged on the outer peripheral surface of the rotor core 1070. The rotor magnet 1080 is bent along the outer peripheral surface of the rotor core 1070. The rotor magnet 1080 is fixed to the outer peripheral surface of the rotor core 1070 by bonding or the like. In the present embodiment, four rotor magnets 1080 are arranged in the circumferential direction of the rotor core 1070. The number of poles of the feed motor 1000 is 4. The number of rotor magnets 1080 is not particularly limited and may be a number other than 4. The retaining tube 1021 has a cylindrical shape. The retaining tube 1021 surrounds the outer circumference of each rotor magnet 1080. The inner peripheral surface of the holding tube 1021 presses the outer surface of each rotor magnet 1080 toward the rotor core 1070 (radial center side). The holding tube 1021 prevents the rotor magnet 1080 from being separated from the rotor core 1070. The holding tube 1021 is made of steel material, resin material, or the like.

[0211] Fig.30 This is an exploded perspective view of the twist motor 2000 according to the present embodiment as viewed from the upper left rear. Fig.31 This is an exploded perspective view of the twist motor 2000 of this embodiment as viewed from the upper left front. Figure 8 , Fig. 9 ), a twisted motor 200 is shown as an IPM motor, but Fig.30 , Fig.31 In the illustrated example, the twisted-coil motor 2000 is an SPM motor in which a rotor magnet 2080 is arranged on the outer peripheral surface of a rotor core 2070 .

[0212] The rotor 2020 of the twisted motor 2000 has a rotor core 2070, a rotor magnet 2080 and a retaining tube 2021. The rotor magnet 2080 is fixed to the rotor core 2070. The rotor magnet 2080 is arranged on the outer peripheral surface of the rotor core 2070. The rotor magnet 2080 is bent along the outer peripheral surface of the rotor core 2070. The rotor magnet 2080 is fixed to the outer peripheral surface of the rotor core 2070 by bonding or the like. In the present embodiment, four rotor magnets 2080 are arranged in the circumferential direction of the rotor core 2070. The number of poles of the twisted motor 2000 is 4. The number of rotor magnets 2080 is not particularly limited, and may be a number other than 4. The retaining tube 2021 has a cylindrical shape. The retaining tube 2021 surrounds the outer periphery of each rotor magnet 2080. The inner peripheral surface of the retaining tube 2021 presses the outer surface of each rotor magnet 2080 toward the rotor core 2070 side. The holding pipe 2021 prevents the rotor magnet 2080 from being separated from the rotor core 2070. The holding pipe 2021 is made of a steel material, a resin material, or the like.

[0213] In the second to ninth embodiments described above, a motor may be provided instead of the feed motor 100 and the twist motor 200. Figure 28 to Figure 31 The feeding motor 1000 and the twisting motor 2000 are provided.

[0214] As described above, in the embodiment, the controller 300 includes the circuit board 301 including the inverter circuit 313 for driving the feed motor 1000 as the first brushless motor and the heat sink 315 thermally connected to the inverter circuit 313 .

[0215] In the above-described structure, it is possible to suppress a temperature increase in the controller 300 .

[0216] In the embodiment, the controller 300 includes a circuit board 301 including an inverter circuit 323 for driving the twisted motor 200 as the second brushless motor and a heat sink 325 thermally connected to the inverter circuit 323 .

[0217] In the above-described structure, it is possible to suppress a temperature increase in the controller 300 .

[0218] In the embodiment, the circuit board 301 includes heat sinks 315 and 325 thermally connected to at least one of the inverter circuit 313 as the first inverter circuit and the inverter circuit 323 as the second inverter circuit.

[0219] In the above-described structure, it is possible to suppress a temperature increase in the controller 300 .

[0220] In the embodiment, the reinforcing bar tying machine 2 further includes a wireless communication unit 500 provided on the handle portion 6 .

[0221] In the above structure, the wireless communication unit 500 and the controller 300 are arranged in an appropriate positional relationship.

[0222] In the embodiment, the reinforcing bar tying machine 2 has a noise removing member 510 for removing electromagnetic noise on the power line of the power cable 401 connecting the feed motor 1000 as the first brushless motor and the controller 300. The reinforcing bar tying machine 2 has a noise removing member 510 for removing electromagnetic noise on the power line of the power cable 403 connecting the twisting motor 2000 as the second brushless motor and the controller 300.

[0223] In the above-described structure, the influence of electromagnetic noise can be suppressed by arranging the brushless motor (feed motor 1000, twist motor 2000) and the controller 300 in an appropriate positional relationship.

[0224] [11th embodiment]

[0225] In the following description, the same reference numerals are given to the same or equivalent components as those in the above-mentioned embodiment, and the description of the components is simplified or omitted.

[0226] Fig.32 3 is a diagram schematically showing an example of the configuration of the controller 300 of this embodiment. In the eleventh embodiment, a wireless communication unit 500, a heat sink (315, 325) and a noise removal member 510 are further provided in addition to the configuration shown in the third embodiment.

[0227] The controller 300 is arranged in the head 4. In the head 4, the controller 300 is arranged at a position lower than the feed motor 100 and the twisting motor 200. The controller 300 is arranged in the head 4 in a manner that the circuit board 301 extends in the front-back direction. The controller 300 is arranged in the head 4 in a manner that the first surface 301A of the circuit board 301 on which the first control circuit 310 and the second control circuit 320 are mounted faces upward. In addition, the controller 300 may be arranged in the head 4 in a manner that the first surface 301A of the circuit board 301 faces downward.

[0228] The circuit board 301 includes a heat sink (315, 325) thermally connected to at least one of the inverter circuit 313 (first inverter circuit) and the inverter circuit 323 (second inverter circuit). Fig.32In the embodiment, a heat sink 315 is provided in the inverter circuit 313, and a heat sink 325 is provided in the inverter circuit 323. The first control circuit 310 is mounted on the front side of the circuit board 301. The heat sink 315 is provided in the inverter circuit 313 of the first control circuit 310. The heat sink 315 is in contact with the surface of the switching element constituting the inverter circuit 313 via a heat conductive material. The second control circuit 320 is mounted on the rear side of the circuit board 301. The heat sink 325 is provided in the inverter circuit 323 of the second control circuit 320. The heat sink 325 is in contact with the surface of the switching element constituting the inverter circuit 323 via a heat conductive material. Therefore, the heat sink 315 and the heat sink 325 are provided on the first surface 301A side of the circuit board 301.

[0229] The wireless communication unit 500 is disposed on the handle portion 6. The wireless communication unit 500 is connected to the controller 300 by wire. The wireless communication unit 500 is connected to the second surface 301B of the circuit board 301 by wire through the connection cable 409. The connection cable 409 includes a signal line and a power line. The controller 300 supplies power from the battery 10 to the wireless communication unit 500 via the connection cable 409. The controller 300 exchanges signals with the wireless communication unit 500 via the connection cable 409.

[0230] The first surface 301A of the circuit board 301 and the feed motor 100 are connected via a power cable 401. The first noise removal member 510 is provided on the power cable 401 for supplying power to the feed motor 100. The first noise removal member 510 is disposed between the first surface 301A of the circuit board 301 and the feed motor 100. The three power lines (U-phase, V-phase, and W-phase power lines) included in the power cable 401 are respectively passed through three through holes 511 (see FIG. 1 ) of the first noise removal member 510. Fig. 27 ). The first surface 301A of the circuit board 301 and the twisted motor 200 are connected via a power cable 403. The second noise removal member 510 is provided on the power cable 403 for supplying power to the twisted motor 200. The second noise removal member 510 is arranged between the first surface 301A of the circuit board 301 and the twisted motor 200. The three power lines (U-phase, V-phase, and W-phase power lines) included in the power cable 403 are respectively passed through the three through holes 511 (see Fig. 27 ).

[0231] In the second embodiment described above, the wireless communication unit 500 , the heat sinks 315 and 325 , and the noise removing member 510 may be provided.

[0232] [12th embodiment]

[0233] In the following description, the same reference numerals are given to the same or equivalent components as those in the above-mentioned embodiment, and the description of the components is simplified or omitted.

[0234] Fig.33 3 is a diagram schematically showing an example of the configuration of the controller 3001 of this embodiment. In the twelfth embodiment, a wireless communication unit 500, heat sinks 315, 325, and a noise removal member 510 are further provided in addition to the configuration shown in the ninth embodiment.

[0235] The controller 3001 is disposed on the leg 8. The circuit board 3011 is extended in the front-rear direction. The controller 3001 is disposed on the leg 8 with the first surface 3011A of the circuit board 3011 on which the first control circuit 310 and the second control circuit 320 are mounted facing upward.

[0236] A sensor substrate 109 is provided on the feed motor 100. An inverter circuit 313 for controlling the feed motor 100 is provided on the sensor substrate 109. Therefore, the inverter circuit 313 is not provided in the first control circuit 310. A heat sink 315 is provided on the inverter circuit 313 of the sensor substrate 109. The heat sink 315 is in contact with the surface of the switching element constituting the inverter circuit 313 via a heat conductive material. A sensor substrate 209 is provided on the twisted motor 200. An inverter circuit 323 for controlling the twisted motor 200 is provided on the sensor substrate 209. Therefore, the inverter circuit 323 is not provided in the second control circuit 320. A heat sink 325 is provided on the inverter circuit 323 of the sensor substrate 209. The heat sink 325 is in contact with the surface of the switching element constituting the inverter circuit 323 via a heat conductive material.

[0237] The wireless communication unit 500 is disposed on the handle portion 6 . The wireless communication unit 500 is connected to the controller 300 via a connection cable 409 .

[0238] The circuit board 3011 and the sensor substrate 109 are connected via the power cable 401 and the signal cable 402. The first noise removing member 510 is provided on the power cable 401. The first noise removing member 510 is arranged between the circuit board 3011 and the sensor substrate 109. The three power lines (U-phase, V-phase, and W-phase power lines) included in the power cable 401 are respectively passed through the three through holes 511 (see FIG. 4 ) of the first noise removing member 510. Fig. 27). The circuit board 3011 and the sensor substrate 209 are connected via the power cable 403 and the signal cable 404. The second noise removal member 510 is provided on the power cable 403. The second noise removal member 510 is arranged between the circuit board 3011 and the sensor substrate 209. The three power lines (U-phase, V-phase, and W-phase power lines) included in the power cable 403 are respectively passed through the three through holes 511 (see Fig. 27 ).

[0239] Description of Reference Numerals

[0240] 2. Steel bar tying machine; 4. Head; 6. Handle; 8. Foot; 10. Battery; 12. Housing; 14. Left housing; 16. Right housing; 16a. Threaded boss; 16b. Threaded boss; 16c. Threaded boss; 18. Side cover housing; 18a. Cover holding portion; 20. Reel storage chamber; 22. Reel cover; 22a. Mounting portion; 22b. Mounting portion; 24. Reel; 28. Trigger; 30. Trigger lock; 34. Trigger switch; 36. Storage mechanism; 38. Feeding mechanism; 40. Braking mechanism; 42. Guide mechanism; 44. Cutting mechanism; 46. Twisting mechanism; 54. Cam member; 64. Bearing; 66. Magnetic sensor; 68. Guide member; 70. Cover member; 74. Speed ​​reduction mechanism; 78 , driving gear; 80, driven gear; 82, release lever; 86, locking lever; 88, guide tube; 90, upper curling guide; 92, lower curling guide; 92a, swing shaft; 92b, torsion spring; 100, feed motor (first brushless motor); 101, stator; 102, rotor; 103, rotor shaft; 104, stator core; 105, coil; 106, terminal; 107, rotor core; 108, rotor magnet; 109, sensor substrate; 109A, circuit board part; 109B, support part; 110, magnetic sensor; 111, fan; 112, insulator; 113, balance correction plate; 114, output pinion; 120, swing member; 134, magnetic sensor; 136, opening and closing detection mechanism; 138, opening and closing detection member; 140, compression spring; 142, magnetic sensor; 146, solenoid; 148, compression spring; 150, brake member; 172, speed reduction mechanism; 174, sleeve; 176, pusher; 178, hook; 180, side plate; 184, side plate; 188, elastic cover; 190, elastic cover; 200, twisted motor (second brushless motor); 201, stator; 202, rotor; 203, rotor shaft; 204, stator core; 205, coil; 206, terminal; 207, rotor core; 208, rotor magnet; 209, sensor substrate; 209A, circuit board portion; 209B, support portion; 210, magnetic sensor; 211, fan; 212, insulator; 213, balance correction plate; 214, output pinion; 300, controller; 301, circuit board; 301A, first surface; 301B, second surface; 310, first control circuit; 311, microcomputer; 312, gate drive circuit; 313, inverter circuit; 314, capacitor; 320, second control circuit; 321, microcomputer; 322, gate drive circuit; 323, inverter circuit; 324, capacitor; 330, holding part; 401, power cable; 402, signal cable; 403, power cable; 404, signal cable; 405, power supply cable; 406, signal cable; 409, connecting cable; 1000, feed motor; 1020, rotor; 1021, holding tube;1070, rotor core; 1080, rotor magnet; 2000, twisted motor; 2020, rotor; 2021, retaining tube; 2070, rotor core; 2080, rotor magnet; 3000, controller; 3001, controller; 3010, circuit board; 3011, circuit board; 3011A, first surface; 3011B, second surface; 3020, controller housing; 3030, terminal; 3040, guide. ;

Claims

1. A steel bar bundling machine, wherein: The steel bar tying machine has: a first brushless motor for conveying the wire wound on the drum; a second brushless motor for twisting the metal wires; a head portion, on which the reel, the first brushless motor, and the second brushless motor are arranged; a handle portion extending downward from the head portion; A foot portion, which is disposed below the handle portion and to which a battery is connected; as well as a controller that controls the first brushless motor and the second brushless motor, The controller is configured on the handle portion.

2. The steel bar bundling machine according to claim 1, wherein: The controller includes a circuit board that is long in a predetermined direction, and the controller is disposed on the handle portion such that the circuit board extends in a vertical direction.

3. The steel bar bundling machine according to claim 2, wherein: The controller comprises: a first control circuit mounted on the circuit board, the first control circuit controlling the first brushless motor; and a second control circuit mounted on the circuit board, the second control circuit controlling the second brushless motor, The controller is disposed on the handle portion such that a first surface of the circuit board on which the first control circuit and the second control circuit are mounted faces leftward or rightward.

4. A steel bar bundling machine, wherein: The steel bar tying machine has: a first brushless motor for conveying the wire wound on the drum; a second brushless motor disposed at a rearward position relative to the first brushless motor, the second brushless motor twisting the metal wires; a head portion, on which the reel, the first brushless motor, and the second brushless motor are arranged; a handle portion extending downward from the head portion; A foot portion, which is disposed below the handle portion and to which a battery is connected; as well as a controller including a circuit board extending in a front-rear direction, the controller controlling the first brushless motor and the second brushless motor, A first control circuit including a first gate drive circuit and a first inverter circuit for controlling the first brushless motor is mounted on the front side of the circuit board. A second control circuit including a second gate drive circuit and a second inverter circuit for controlling the second brushless motor is mounted on the rear side of the circuit board.

5. The steel bar bundling machine according to claim 4, wherein: The controller is configured on the head.

6. The steel bar bundling machine according to claim 5, wherein: The controller is disposed on the handle portion such that a first surface of the circuit board on which the first control circuit and the second control circuit are mounted faces leftward or rightward.

7. The steel bar bundling machine according to claim 5, wherein: The controller is disposed on the handle portion such that a first surface of the circuit board on which the first control circuit and the second control circuit are mounted faces upward.

8. The steel bar bundling machine according to claim 1 or 4, wherein: The first brushless motor includes a first stator and a first rotor disposed around the first stator. The first brushless motor is arranged such that the rotation axis of the first rotor extends in the vertical direction. A first terminal for connecting the plurality of coils of the first stator is disposed at the rear of the first stator. A first sensor substrate for detecting the rotation of the first rotor is arranged below the first stator. The first terminal and the controller are connected via a first power cable, The first sensor substrate and the controller are connected via a first signal cable.

9. The steel bar bundling machine according to claim 1 or 4, wherein: The second brushless motor includes a second stator and a second rotor disposed around the second stator. The second brushless motor is arranged so that the rotation axis of the second rotor extends in the front-rear direction. A second terminal for connecting the plurality of coils of the second stator is disposed at a lower portion of the second stator. A second sensor substrate for detecting the rotation of the second rotor is arranged at a rearward position relative to the second stator. The second terminal and the controller are connected via a second power cable. The second sensor substrate and the controller are connected via a second signal cable.

10. The steel bar bundling machine according to claim 1 or 4, wherein: At least one of the first brushless motor and the second brushless motor includes a sensor substrate for detecting rotation of a rotor. The sensor substrate includes an inverter circuit for driving a motor.

11. The steel bar bundling machine according to claim 1, wherein: The controller includes a circuit board having an inverter circuit for driving a motor and a heat sink thermally connected to the inverter circuit.

12. The steel bar bundling machine according to claim 4, wherein: The circuit board includes a heat sink thermally connected to at least one of the first inverter circuit and the second inverter circuit.

13. The steel bar bundling machine according to claim 1 or 4, wherein: The reinforcing bar binding machine further includes a wireless communication unit provided on the handle portion.

14. The steel bar bundling machine according to claim 1 or 4, wherein: A noise removing member for removing electromagnetic noise is provided on a power line connecting at least one of the first brushless motor and the second brushless motor and the controller.

15. A steel bar bundling machine, wherein: The steel bar tying machine has: a first brushless motor for conveying the wire wound on the drum; a second brushless motor for twisting the metal wires; a head portion, on which the reel, the first brushless motor, and the second brushless motor are arranged; a handle portion extending downward from the head portion; A foot portion, which is disposed below the handle portion and to which a battery is connected; as well as a controller that controls the first brushless motor and the second brushless motor, The controller is arranged on the foot. The controller includes a circuit board, a controller case that accommodates the circuit board, and a terminal that connects the battery and the circuit board.

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