WO2024079973A1 - Machine de fixation de barre d'armature - Google Patents

Machine de fixation de barre d'armature Download PDF

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Publication number
WO2024079973A1
WO2024079973A1 PCT/JP2023/029235 JP2023029235W WO2024079973A1 WO 2024079973 A1 WO2024079973 A1 WO 2024079973A1 JP 2023029235 W JP2023029235 W JP 2023029235W WO 2024079973 A1 WO2024079973 A1 WO 2024079973A1
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WO
WIPO (PCT)
Prior art keywords
controller
brushless motor
disposed
circuit board
motor
Prior art date
Application number
PCT/JP2023/029235
Other languages
English (en)
Japanese (ja)
Inventor
和典 木下
祐太 朝倉
Original Assignee
株式会社マキタ
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社マキタ filed Critical 株式会社マキタ
Publication of WO2024079973A1 publication Critical patent/WO2024079973A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F15/00—Connecting wire to wire or other metallic material or objects; Connecting parts by means of wire
    • B21F15/02—Connecting wire to wire or other metallic material or objects; Connecting parts by means of wire wire with wire
    • B21F15/06—Connecting wire to wire or other metallic material or objects; Connecting parts by means of wire wire with wire with additional connecting elements or material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B25/00—Implements for fastening, connecting or tensioning of wire or strip
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B13/00—Bundling articles
    • B65B13/18—Details of, or auxiliary devices used in, bundling machines or bundling tools
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/12—Mounting of reinforcing inserts; Prestressing

Definitions

  • the technology disclosed in this specification relates to a rebar tying machine.
  • a controller When using a brushless motor as the power source for a rebar tying machine, a controller is required to control the brushless motor. To prevent the rebar tying machine from becoming too large, the controller must be placed in an appropriate position.
  • the technology disclosed in this specification aims to position the controller in an appropriate position in a rebar tying machine.
  • the rebar tying machine may include a first brushless motor that feeds wire wound on a reel, a second brushless motor that twists the wire, a head portion in which the reel, the first brushless motor, and the second brushless motor are arranged, a grip portion that extends downward from the head portion, a foot portion that is arranged below the grip 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 in the grip portion.
  • the technology disclosed in this specification allows the controller to be positioned appropriately in the rebar tying machine.
  • FIG. 1 is a perspective view of a reinforcing bar binding machine according to a first embodiment, seen from the upper left rear.
  • FIG. 2 is a perspective view of the reinforcing bar binding machine according to the first embodiment, seen from the upper right rear.
  • FIG. 3 is a perspective view of a portion of the internal structure of the reinforcing bar binding machine according to the first embodiment, as viewed from the upper right rear.
  • FIG. 4 is a perspective view of a portion of the internal structure of the reinforcing bar binding machine according to the first embodiment, as viewed from the upper left front.
  • FIG. 5 is a view showing the internal structure of the reinforcing bar binding machine according to the first embodiment as viewed from the left.
  • FIG. 1 is a perspective view of a reinforcing bar binding machine according to a first embodiment, seen from the upper left rear.
  • FIG. 2 is a perspective view of the reinforcing bar binding machine according to the first embodiment, seen from the upper right rear.
  • FIG. 3 is
  • FIG. 6 is an exploded perspective view of the feed motor according to the first embodiment, as viewed from below and on the front right.
  • FIG. 7 is an exploded perspective view of the feed motor according to the first embodiment, as viewed from above and to the front.
  • FIG. 8 is an exploded perspective view of the torsion motor according to the first embodiment, as viewed from the upper left rear.
  • FIG. 9 is an exploded perspective view of the torsion motor according to the first embodiment, as viewed from the upper left front.
  • FIG. 10 is a front view showing the controller according to the first embodiment.
  • FIG. 11 is a rear view showing the controller according to the first embodiment.
  • FIG. 12 is a diagram illustrating an example of the arrangement of controllers according to the first embodiment.
  • FIG. 13 is a diagram illustrating an example of the arrangement of controllers according to the second embodiment.
  • FIG. 14 is a diagram illustrating an example of the arrangement of controllers according to the third embodiment.
  • FIG. 15 is a diagram illustrating an example of the arrangement of controllers according to the fourth embodiment.
  • FIG. 16 is a diagram illustrating an example of the arrangement of controllers according to the fifth embodiment.
  • FIG. 17 is an exploded perspective view of the feed motor according to the fifth embodiment, as viewed from below and right-front.
  • FIG. 18 is an exploded perspective view of the feed motor according to the fifth embodiment, as viewed from above and to the front right.
  • FIG. 19 is an exploded perspective view of the torsion motor according to the fifth embodiment, as viewed from the upper left rear.
  • FIG. 17 is an exploded perspective view of the feed motor according to the fifth embodiment, as viewed from below and right-front.
  • FIG. 18 is an exploded perspective view of the feed motor according to the fifth embodiment, as viewed from above and to the front
  • FIG. 20 is an exploded perspective view of the torsion motor according to the fifth embodiment, as viewed from the upper left front.
  • FIG. 21 is a front view showing a controller according to the fifth embodiment.
  • FIG. 22 is a diagram illustrating an example of the arrangement of controllers according to the sixth embodiment.
  • FIG. 23 is a diagram illustrating an example of the arrangement of controllers according to the seventh embodiment.
  • FIG. 24 is a diagram illustrating an example of the arrangement of controllers according to the eighth embodiment.
  • FIG. 25 is a diagram illustrating an example of the arrangement of controllers according to the ninth embodiment.
  • FIG. 26 is a diagram illustrating an example of the arrangement of controllers according to the tenth embodiment.
  • FIG. 27 is a schematic perspective view showing a controller according to the tenth embodiment.
  • FIG. 28 is an exploded perspective view of the feed motor according to the tenth embodiment, as viewed from below and on the front right.
  • FIG. 29 is an exploded perspective view of the feed motor according to the tenth embodiment, as viewed from above and to the front right.
  • FIG. 30 is an exploded perspective view of the torsion motor according to the tenth embodiment, as viewed from the upper left rear.
  • FIG. 31 is an exploded perspective view of the torsion motor according to the tenth embodiment, as viewed from the upper left front.
  • FIG. 32 is a diagram illustrating an example of the arrangement of controllers according to the eleventh embodiment.
  • FIG. 33 is a diagram illustrating an example of the arrangement of controllers according to the twelfth embodiment.
  • the rebar tying machine may include a first brushless motor that feeds the wire wound on a reel, a second brushless motor that twists the wire, a head portion in which the reel, the first brushless motor, and the second brushless motor are arranged, a grip portion that extends downward from the head portion, a foot portion that is arranged below the grip 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 in the grip portion.
  • the controller is placed in an appropriate position in the rebar tying machine.
  • the controller may include a circuit board that is long in a predetermined direction and is disposed in the grip portion so that the circuit board extends in the vertical direction.
  • the controller is properly positioned in the grip section.
  • the controller may include a first control circuit mounted on a circuit board and controlling the first brushless motor, and a second control circuit mounted on the circuit board and controlling the second brushless motor.
  • the controller may be disposed in the grip 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.
  • the controller is properly positioned in the grip section.
  • the rebar tying machine may include a first brushless motor that feeds wire wound on a reel, a second brushless motor that is located behind the first brushless motor and twists the wire, a head portion in which the reel, the first brushless motor, and the second brushless motor are located, a grip portion that extends downward from the head portion, a foot portion that is located below the grip portion and to which a battery is connected, and a controller that includes a circuit board that extends in the front-to-rear direction and controls 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 may be mounted on the front side of the circuit board, and a second control circuit including 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.
  • the distance between the first brushless motor and the first control circuit is short, and the distance between the second brushless motor and the second control circuit is short. This allows the controller to be positioned appropriately in the rebar binding machine.
  • the controller may be located in the head portion.
  • the controller is placed in an appropriate position in the rebar tying machine.
  • the controller may be positioned in the grip portion such that the first surface of the circuit board on which the first control circuit and the second control circuit are mounted faces leftward or rightward.
  • the controller is properly positioned on the head unit.
  • the controller may be disposed in the grip portion such that the first surface of the circuit board on which the first control circuit and the second control circuit are mounted faces upward.
  • the controller is properly positioned on the head unit.
  • the first brushless motor has a first stator and a first rotor arranged around the first stator, the first brushless motor is arranged so that the rotation axis of the first rotor extends in the vertical direction, a first terminal connecting the multiple coils of the first stator is arranged at the rear of the first stator, a first sensor board detecting the rotation of the first rotor is arranged below the first stator, the first terminal and the controller are connected by a first power cable, and the first sensor board and the controller may be connected by a first signal cable.
  • the first brushless motor and the controller are positioned in an appropriate positional relationship.
  • the second brushless motor has a second stator and a second rotor arranged around the second stator, the second brushless motor is arranged so that the rotation axis of the second rotor extends in the front-to-rear direction, a second terminal connecting the multiple coils of the second stator is arranged under the second stator, a second sensor board detecting the rotation of the second rotor is arranged behind the second stator, the second terminal and the controller are connected by a second power cable, and the second sensor board and the controller may be connected by a second signal cable.
  • the second brushless motor and the controller are positioned in an appropriate positional relationship.
  • At least one of the first brushless motor and the second brushless motor may have a sensor board that detects the rotation of the rotor.
  • the sensor board may have an inverter circuit for driving the motor.
  • the above configuration simplifies the controller configuration and improves the freedom of controller placement.
  • 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.
  • the above configuration prevents the controller from overheating.
  • the circuit board may include a heat sink thermally connected to at least one of the first inverter circuit and the second inverter circuit.
  • the above configuration prevents the controller from overheating.
  • the rebar tying machine may further include a wireless communication unit provided in the grip portion.
  • the wireless communication unit and the controller are positioned in an appropriate positional relationship.
  • the rebar binding machine may have a noise removal member that removes electromagnetic noise in the power line connecting at least one of the first brushless motor and the second brushless motor to the controller.
  • the above configuration allows the brushless motor and controller to be positioned in an appropriate positional relationship, while suppressing the effects of electromagnetic noise.
  • the rebar tying machine includes a first brushless motor that feeds wire wound on a reel, a second brushless motor that twists the wire, a head portion in which the reel, the first brushless motor, and the second brushless motor are arranged, a grip portion that extends downward from the head portion, a foot portion that is arranged below the grip 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 arranged in the foot portion, and the controller may have a circuit board, a controller case that houses the circuit board, and terminals that connect the battery and the circuit board.
  • the controller is placed in an appropriate position in the rebar tying machine.
  • Fig. 1 is a perspective view of a reinforcing bar binding machine 2 according to this embodiment, seen from the upper left rear.
  • Fig. 2 is a perspective view of a reinforcing bar binding machine 2 according to this embodiment, seen from the upper right rear.
  • Fig. 3 is a perspective view of a part of the internal structure of the reinforcing bar binding machine 2 according to this embodiment, seen from the upper right rear.
  • Fig. 4 is a perspective view of a part of the internal structure of the reinforcing bar binding machine 2 according to this embodiment, seen from the upper left front.
  • Fig. 5 is a view of the internal structure of the reinforcing bar binding machine 2 according to this embodiment, seen from the left.
  • the reinforcing bar binding machine 2 is an electric tool for binding a plurality of reinforcing bars with wire.
  • the rebar tying machine 2 includes a feed motor 100, a twisting motor 200, a head unit 4, a grip unit 6, a foot unit 8, and a controller 300. Wire is wound around the reel 24.
  • the feed motor 100 feeds the wire wound around the reel 24.
  • the twisting motor 200 twists the wire fed by the feed motor 100.
  • the reel 24, the feed motor 100, and the twisting motor 200 are arranged in the head unit 4.
  • the grip unit 6 extends downward from the head unit 4 and is held by a user.
  • the foot unit 8 is arranged below the grip unit 6 and is connected to the battery 10.
  • the battery 10 is detachable from the bottom of the foot unit 8.
  • the battery 10 is a slide-type battery that can be attached and detached by sliding it relative to the foot unit 8.
  • the battery 10 is a lithium-ion battery that can be charged by a charger. When the battery 10 is connected to the foot portion 8, power is supplied from the battery 10 to the rebar binding machine 2. A battery terminal that is electrically connected to the battery 10 is provided on the underside of the foot portion 8. The battery terminal is electrically connected to the controller 300. The controller 300 controls the feed motor 100 and the twist motor 200. The controller 300 is disposed in the grip portion 6.
  • the rebar 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 synthetic resin.
  • the left housing 14, the right housing 16, and the side cover housing 18 can each be said to be a plurality of housing plates that make up the housing 12.
  • the left housing 14 is integrally formed with the outer shape of the left half of the head portion 4, the outer shape of the left half of the grip portion 6, and the outer shape of the left half of the foot portion 8.
  • the right housing 16 is integrally formed with a part of the outer shape of the right half of the head portion 4, the outer shape of the right half of the grip portion 6, and the outer shape of the right half of the foot portion 8.
  • the left housing 14 is fixed to the right housing 16 by a plurality of screws.
  • the side cover housing 18 is formed with a part of the outer shape of the right half of the head portion 4.
  • the side cover housing 18 is fixed to the right housing 16 by a plurality of screws.
  • a reel storage chamber 20 that stores a reel 24 is formed behind the head portion 4.
  • the reel storage chamber 20 is covered from above by a reel cover 22.
  • the reel cover 22 is held to the head portion 4 via annular attachment portions 22a, 22b provided on the left and right, and opens and closes the reel storage chamber 20 by rotating relative to the head portion 4 with the left and right direction as a rotation axis.
  • the upper front portion of the grip portion 6 is provided with a trigger 28 that can be pulled by the user, and a trigger lock 30 that is located behind the trigger 28 and can be switched between a state in which pulling the trigger 28 is permitted and a state in which pulling the trigger 28 is prohibited.
  • the trigger 28 is held by the left housing 14 and the right housing 16 so that it can slide forward and backward relative to the grip portion 6.
  • the trigger 28 is biased forward by a compression spring held by the left housing 14 and the right housing 16.
  • a trigger switch 34 is located at the upper portion inside the grip portion 6.
  • the trigger switch 34 is electrically connected to the controller 300.
  • the trigger lock 30 is held by the left housing 14 and the right housing 16 so that it can slide left and right relative to the grip section 6.
  • the trigger lock 30 can move between an allowable position that allows the trigger 28 to be pulled and a prohibition position that prohibits the trigger 28 from being pulled.
  • the trigger lock 30 can move backward. That is, when the trigger lock 30 is in the allowable position, the user can pull the trigger 28.
  • the trigger lock 30 is in the allowable position and the user presses the trigger lock 30 from the left side of the grip section 6, the trigger lock 30 slides rightward and moves to the prohibition position.
  • the trigger lock 30 faces the stopper of the trigger 28. In this state, when the trigger 28 moves backward, the trigger lock 30 abuts against the trigger 28, and the trigger 28 is prohibited from moving further backward. That is, when the trigger lock 30 is in the prohibition position, the user is prohibited from pulling the trigger 28.
  • the head unit 4 mainly comprises a storage mechanism 36, a feed mechanism 38, a brake mechanism 40, a guide mechanism 42, a cutting mechanism 44, and a twisting mechanism 46.
  • the storage mechanism 36 is disposed at the rear of the head portion 4 and removably holds the reel 24 stored in the reel storage chamber 20.
  • the reel 24 is rotatably supported by the storage mechanism 36 in the reel storage chamber 20.
  • the storage mechanism 36 includes a cam member 54 provided on the left side of the reel storage chamber 20.
  • the cam member 54 holds the reel cover 22.
  • the storage mechanism 36 also includes a bearing 64 that supports the reel 24, and a magnetic sensor 66.
  • the reel 24 is rotatably held in the right housing 16 via the bearing 64.
  • the magnetic sensor 66 is disposed on the outside of the right housing 16.
  • the magnetic sensor 66 is electrically connected to the controller 300.
  • the magnetic sensor 66 is attached to the right housing 16. When the side cover housing 18 is attached to the right housing 16, the magnetic sensor 66 is sandwiched between the right housing 16 and the side cover housing 18.
  • the reel 24 rotates, the sensor magnet provided on the reel 24 rotates together with the reel 24, and the magnetism detected by the magnetic sensor 66 fluctuates.
  • the controller 300 can detect the rotation of the reel 24 from the fluctuation in magnetism from the sensor magnet detected by the magnetic sensor 66.
  • the rotation sensor that detects the rotation of the reel 24 does not have to be a magnetic sensor 66.
  • An example of a rotation sensor that detects the rotation of the reel 24 is a photocoupler (optical sensor).
  • the feed mechanism 38 is located at the top near the center of the head unit 4 in the front-to-rear direction, and feeds the wire supplied from the reel 24 of the storage mechanism 36 to the guide mechanism 42 in front of the head unit 4.
  • the feed mechanism 38 includes a guide member 68, a cover member 70, a feed motor 100, a reduction mechanism 74, a drive gear 78, a driven gear 80, a release lever 82, and a lock lever 86.
  • the main gear 78 is connected to the feed motor 100 via the reduction mechanism 74.
  • the feed motor 100 is a DC brushless motor.
  • the feed motor 100 is electrically connected to the controller 300.
  • the controller 300 can control the operation of the feed motor 100.
  • the main gear 78 is rotatably held by the cover member 70 via a bearing.
  • the reduction mechanism 74 is housed in the space inside the cover member 70. In other words, the reduction mechanism 74 is disposed on the feed motor 100 side as viewed from the cover member 70, and reduces the rotation of the feed motor 100 before transmitting it to the main gear 78.
  • the guide member 68 has an insertion hole that guides the wire pulled out from the reel 24 toward the driving gear 78 and the driven gear 80.
  • 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 held between the driving gear 78 and the driven gear 80 is sent 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 considered as feed rollers that send out the wire.
  • the release lever 82 swings and the driven gear 80 moves away from the driving gear 78.
  • the release lever 82 is held in the pushed-in state.
  • 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 tip of the wire pulled out from the reel 24 is placed between the driving gear 78 and the driven gear 80 through the insertion hole of the guide member 68.
  • the guide mechanism 42 is disposed at the front of the head unit 4 and guides the wire fed from the feed mechanism 38 in a circular shape around the rebars.
  • the guide mechanism 42 includes a guide pipe 88, an upper curl guide 90, and a lower curl guide 92.
  • the rear end of the guide pipe 88 opens toward the space between the driving gear 78 and the driven gear 80 of the feed mechanism 38.
  • the wire fed from the feed mechanism 38 is fed into the guide pipe 88.
  • the front end of the guide pipe 88 opens toward the interior of the upper curl guide 90.
  • the wire fed from the guide pipe 88 is guided toward the oscillating member 120.
  • the oscillating member 120 cuts the wire by shearing.
  • the wire is fed toward the lower curl guide 92.
  • 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 toward the front of the lower curl guide 92.
  • a magnetic sensor 134 is attached to the right housing 16 in front of the head unit 4.
  • the magnetic sensor 134 is electrically connected to the controller 300.
  • the controller 300 can detect from the detection signal of the magnetic sensor 134 whether or not multiple rebars are pressed against the upper curl guide 90.
  • the right housing 16 in front of the head portion 4 is formed with screw bosses 16a, 16b, and 16c used when attaching the left housing 14 to the right housing 16.
  • the upper curl guide 90 can be attached to the right housing 16 without increasing the number of parts.
  • the upper curl guide 90 can be accurately positioned relative to the right housing 16.
  • the area where the screw bosses 16a, 16b, and 16c are formed has a relatively high strength even among the right housing 16, so high durability can be ensured even when a load caused by a collision with multiple reinforcing bars is transmitted from the upper curl guide 90 to the right housing 16.
  • the lower curl guide 92 is supported by the left housing 14 and the right housing 16 so that it can swing via a swing shaft 92a.
  • the lower curl guide 92 can swing between a closed state and an open state.
  • the lower curl guide 92 is biased in the closing direction by a torsion spring 92b.
  • the lower curl guide 92 is in a closed state. If a wire becomes tangled in the torsion mechanism 46 while the user is using the rebar binding machine 2, the user can remove the wire tangled in the torsion mechanism 46 by opening the lower curl guide 92 against the biasing force of the torsion spring 92b.
  • An opening/closing detection mechanism 136 that detects the open/closed state of the lower curl guide 92 is provided at the front lower part of the head unit 4.
  • the opening/closing detection mechanism 136 is attached to the right housing 16.
  • the opening/closing detection mechanism 136 includes an opening/closing detection member 138, a compression spring 140, and a magnetic sensor 142.
  • the opening/closing detection member 138 is supported swingably by the right housing 16.
  • the opening/closing detection member 138 is biased in the swinging direction upward by the compression spring 140 held by the right housing 16.
  • a sensor magnet is attached to the opening/closing detection member 138.
  • the magnetic sensor 142 is fixed to the right housing 16.
  • the magnetic sensor 142 is electrically connected to the controller 300.
  • the lower curl guide 92 presses down on the opening/closing detection member 138, and the sensor magnet of the opening/closing detection member 138 is positioned opposite the magnetic sensor 142.
  • the lower curl guide 92 moves away from the open/close detection member 138. This causes the open/close detection member 138 to swing, and the sensor magnet of the open/close detection member 138 is positioned away from the magnetic sensor 142.
  • the controller 300 can detect the open/close state of the lower curl guide 92 from the detection signal of the magnetic sensor 142.
  • a metallic side plate 180 attached to the left housing 14 is provided on the left housing 14 near the lower curl guide 92.
  • a metallic side plate 184 attached to the right housing 16 is provided on the right housing 16 near the lower curl guide 92.
  • the upper curl guide 90 feeds the wire downward from above and in front of the multiple rebars, and the lower curl guide 92 feeds the wire fed from the upper curl guide 90 upward from below and behind the multiple rebars. This causes the wire fed from the feed mechanism 38 to be wound in a circular shape around the multiple rebars.
  • the feed mechanism 38 stops the feed motor 100 and stops feeding the wire.
  • the brake mechanism 40 stops the rotation of the reel 24 in conjunction with the feed mechanism 38 stopping the feeding of the wire.
  • 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 attached to the right housing 16 so that it can swing.
  • the output shaft of the solenoid 146 which moves back and forth in the vertical direction, is connected to the brake member 150.
  • the brake member 150 is also biased by the compression spring 148 in a swinging direction away from the reel 24. When the solenoid 146 is not energized, the biasing force of the compression spring 148 causes the brake member to move away from the engagement portion of the reel 24.
  • the solenoid 146 When the solenoid 146 is energized, the solenoid 146 drives the brake member 150, and torque acts on the brake member 150, causing the brake member 150 to swing and engage with the engagement portion of the reel 24.
  • the controller 300 does not energize the solenoid 146, causing the brake member 150 to move away from the engagement portion of the reel 24. This allows the reel 24 to rotate freely, and the feed mechanism 38 to pull out the wire from the reel 24.
  • the controller 300 energizes the solenoid 146, causing the brake member 150 to engage with the engagement portion of the reel 24. This prevents the reel 24 from rotating. This prevents the reel 24 from continuing to rotate due to inertia even after the feed mechanism 38 has stopped feeding the wire, which can cause the wire to become loose between the reel 24 and the feed mechanism 38.
  • the brake mechanism 40 is located outside the right housing 16 and is housed in a space partitioned by the right housing 16 and the side cover housing 18.
  • a twist motor 200 of the twist mechanism 46, which will be described later, is located in front of the reel 24.
  • the solenoid 146 is positioned so that its longitudinal direction is approximately parallel to the tangential direction of the rotational motion of the part of the reel 24 that is closest to the solenoid 146.
  • the solenoid 146 is also positioned so that its longitudinal direction is approximately parallel to the axis of the feed motor 100.
  • the cutting mechanism 44 is located at the front of the head unit 4 and cuts the wire while it is wound around multiple reinforcing bars.
  • the cutting mechanism 44 is unitized with the upper curl guide 90 of the guide mechanism 42.
  • the twisting mechanism 46 is disposed from the front of the head 4 to the middle in the front-to-rear direction, and binds multiple rebars with the wire by twisting the wire wound around the multiple rebars.
  • the twisting mechanism 46 includes a twisting motor 200, a reduction gear 172, a sleeve 174, a screw shaft (not shown) disposed inside the sleeve 174, a pusher 176, and a hook 178.
  • the torsion motor 200 is a DC brushless motor.
  • the torsion motor 200 is electrically connected to the controller 300.
  • the controller 300 can control the operation of the torsion motor 200.
  • the rotation of the torsion motor 200 is transmitted to the screw shaft via the reduction mechanism 172.
  • the torsion motor 200 can rotate in the forward and reverse directions, and accordingly, the screw shaft can also rotate in the forward and reverse directions.
  • the sleeve 174 is arranged to cover the circumference of the screw shaft. In a state in which the rotation of the sleeve 174 is prohibited, when the screw shaft rotates in the forward direction, the sleeve 174 moves forward, and when the screw shaft rotates in the reverse direction, the sleeve 174 moves backward.
  • the sleeve 174 rotates together with the screw shaft.
  • the pusher 176 moves forward when the sleeve 174 moves forward, and moves backward when the sleeve 174 moves backward.
  • the pusher 176 presses the lower part of the cutting mechanism 44 forward, causing the swinging member 120 to swing.
  • the pusher 176 presses the lower part of the cutting mechanism 44 backward, causing the swinging member 120 to swing.
  • the hook 178 is provided at the front end of the sleeve 174, and opens and closes depending on the position of the sleeve 174 in the front-to-rear direction. When the sleeve 174 moves forward, the hook 178 closes and grips the wire. Conversely, when the sleeve 174 moves backward, the hook 178 opens and releases the wire.
  • the controller 300 rotates the torsion motor 200 with the wire wound around the rebars.
  • the sleeve 174 is prohibited from rotating, and the sleeve 174 advances as the screw shaft rotates, and the pusher 176 and hook 178 advance, the wire is cut by the cutting mechanism 44, and the hook 178 closes to grip the wire.
  • the sleeve 174 is allowed to rotate, the sleeve 174 rotates as the screw shaft rotates, and the hook 178 rotates. This twists the wire and binds the rebars together.
  • the torsion strength of the wire can be preset by the user.
  • the controller 300 twists the wire to the set torsion strength, it rotates the torsion motor 200 in the opposite direction.
  • the sleeve 174 is prohibited from rotating, and the sleeve 174 retreats as the screw shaft rotates, and the hook 178 opens and retreats, releasing the wire.
  • the pusher 176 retracts, and the cutting mechanism 44 returns to its initial state. After that, the pusher 176 and the hook 178 retract to their initial positions, and the sleeve 174 is allowed to rotate, and the hook 178 returns to its initial angle.
  • the rebar tying machine 2 executes a series of operations, winding the wire around the multiple rebars using the feed mechanism 38, brake mechanism 40 and guide mechanism 42, and cutting the wire using the cutting mechanism 44 and twisting mechanism 46, and twisting the wire wound around the multiple rebars.
  • an elastic cover 188 is provided on the outer surface of the storage mechanism 36 that holds the mounting portion 22a of the reel cover 22, and an elastic cover 190 is provided on the cover holding portion 18a of the side cover housing 18 that holds the mounting portion 22b of the reel cover 22.
  • Both elastic covers 188, 190 are made of an elastic material such as an elastomer.
  • Fig. 6 is an exploded perspective view of the feed motor 100 according to this embodiment, as viewed from the right front lower side.
  • Fig. 7 is an exploded perspective view of the feed motor 100 according to this embodiment, as viewed from the right front upper side.
  • 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 disposed around the rotor 102.
  • the rotor 102 is disposed 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 vertical direction.
  • 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 number of teeth protruding radially inward from the inner circumferential surface of the yoke.
  • the stator core 104 is disposed radially outward from the rotor 102.
  • the stator core 104 includes a number of stacked steel plates.
  • the steel plates are metal plates whose main component is iron.
  • the stator core 104 is cylindrical.
  • the teeth of the stator core 104 support the coil 105. In this embodiment, six teeth are provided.
  • the coil 105 is attached to the stator core 104 via the insulator 112.
  • a plurality of coils 105 are arranged.
  • the coils 105 are wound around the teeth of the stator core 104 via the insulator 112.
  • the insulator 112 is an electrically insulating member made of synthetic resin.
  • the coils 105 and the stator core 104 are electrically insulated by the insulator 112.
  • the plurality of coils 105 are connected via bus bars and terminals 106 (fusing terminals).
  • 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.
  • the three terminals 106 are disposed at the rear of the stator core 104.
  • the three terminals 106 are disposed so as to be aligned in the left-right direction.
  • 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 each made of steel.
  • the rotor shaft 103 is disposed in a through hole provided in the center of the rotor core 107.
  • the rotor core 107 and the rotor shaft 103 are fixed.
  • An upper portion of the rotor shaft 103 protrudes upward from the upper end surface of the rotor core 107.
  • An output pinion 114 is fixed to an upper portion of the rotor shaft 103.
  • the rotational force of the rotor shaft 103 is output via the output pinion 114.
  • the rotor magnet 108 is fixed to the rotor core 107.
  • the rotor magnet 108 is disposed inside a magnet hole provided in the rotor core 107.
  • four rotor magnets 108 are disposed 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.
  • the balance correction plate 113 corrects the rotational balance of the rotor 102 so that the rotational balance of the rotor 102 is improved.
  • a sensor board 109 is attached to the stator 101.
  • the sensor board 109 includes an annular circuit board portion 109A that faces the lower end surface of the rotor core 107, and a support portion 109B that is connected to the rear of the stator core 104.
  • a magnetic sensor 110 is disposed 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 direction of rotation.
  • a fan 111 is fixed to the upper end of the rotor shaft 103.
  • the fan 111 rotates together with the rotor shaft 103.
  • the rotation of the fan 111 generates an airflow for cooling the feed motor 100.
  • FIG. 8 is an exploded perspective view of the torsion motor 200 according to this embodiment, as viewed from the upper left rear.
  • FIG. 9 is an exploded perspective view of the torsion motor 200 according to this embodiment, as viewed from the upper left front.
  • the torsion motor 200 generates a rotational force.
  • the torsion motor 200 is an electric motor.
  • the torsion motor 200 is an inner rotor type brushless motor.
  • the torsion motor 200 has a stator 201, a rotor 202, and a rotor shaft 203.
  • the stator 201 is disposed around the rotor 202.
  • the rotor 202 is disposed 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 a rotation axis extending in the
  • 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 number of teeth protruding radially inward from the inner circumferential surface of the yoke.
  • the stator core 204 is disposed radially outward from the rotor 202.
  • the stator core 204 includes a number of stacked steel plates.
  • the steel plates are metal plates whose main component is iron.
  • the stator core 204 is cylindrical.
  • the teeth of the stator core 204 support the coil 205. In this embodiment, six teeth are provided.
  • the coil 205 is attached to the stator core 204 via the insulator 212.
  • a plurality of coils 205 are arranged.
  • the coils 205 are wound around the teeth of the stator core 204 via the insulator 212.
  • the insulator 212 is an electrically insulating member made of synthetic resin.
  • the coils 205 and the stator core 204 are electrically insulated by the insulator 212.
  • the plurality of coils 205 are connected via bus bars and terminals 206 (fusing terminals). In this 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.
  • the three terminals 206 are arranged on the lower part of the stator core 204.
  • the three terminals 206 are arranged side by side in the left-right direction.
  • 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 each made of steel.
  • the rotor shaft 203 is disposed in a through hole provided in 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 disposed inside a magnet hole provided in the rotor core 207.
  • four rotor magnets 208 are disposed 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 so that the rotational balance of the rotor 202 is improved.
  • a sensor board 209 is attached to the stator 201.
  • the sensor board 209 includes an annular circuit board portion 209A that faces the rear end surface of the rotor core 207, and a support portion 209B that is connected to the lower portion of the stator core 204.
  • a magnetic sensor 210 is disposed 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 rotational direction.
  • a fan 211 is fixed to the front of the rotor shaft 203.
  • the fan 211 rotates with the rotor shaft 203.
  • the rotation of the fan 211 generates an airflow for cooling the torsion motor 200.
  • Fig. 10 is a front view showing the controller 300 according to this embodiment.
  • Fig. 11 is a rear view showing the controller 300 according to this embodiment.
  • the controller 300 has a circuit board 301, a first control circuit 310 mounted on the circuit board 301, and a second control circuit 320 mounted on the circuit board 301.
  • the first control circuit 310 controls the feed motor 100.
  • the second control circuit 320 controls the torsion motor 200.
  • the circuit board 301 is a long plate that is long in a specific direction.
  • the circuit board 301 has a first surface 301A and a second surface 301B that faces the opposite direction to the first surface 301A.
  • the first control circuit 310 and the second control circuit 320 are each mounted on the first surface 301A of the circuit board 301.
  • 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 six switching elements.
  • the switching elements include field effect transistors (FETs).
  • the switching elements may be IGBTs or MOSFETs.
  • the gate drive circuit 312 is a drive circuit that drives the switching elements of the inverter circuit 313.
  • the microcomputer 311 outputs a control signal to the gate drive circuit 312 to drive the switching elements of the inverter circuit 313.
  • the capacitor 314 is provided to reduce noise generated when the switching element is switched on.
  • the capacitor 314 is also provided to reduce inductance when the battery 10 is attached to the foot portion 8.
  • 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. Descriptions of the microcomputer 321, the gate drive circuit 322, the inverter circuit 323, and the capacitor 324 will be omitted.
  • ⁇ Controller layout> 12 is a diagram showing a schematic arrangement example of the controller 300 according to the present embodiment.
  • the controller 300 is arranged in the grip portion 6.
  • the controller 300 is arranged in the grip portion 6 so that the circuit board 301 extends in the up-down direction.
  • the controller 300 is arranged in the grip portion 6 so 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 leftward.
  • the controller 300 may be arranged in the grip portion 6 so that the first surface 301A of the circuit board 301 faces leftward.
  • the feed motor 100 and the twist motor 200 are disposed above the controller 300.
  • the feed motor 100 and the twist motor 200 are disposed in the head unit 4.
  • the feed motor 100 is disposed forward of the twist motor 200.
  • the feed motor 100 is arranged so that the rotation axis of the rotor 102 and the rotor shaft 103 extends in the vertical direction.
  • the fan 111 is arranged above the stator 101.
  • the terminal 106 that connects the multiple coils of the stator 101 is arranged at the rear of the stator 101.
  • the sensor board 109 that detects the rotation of the rotor 102 is arranged below the stator 101.
  • the terminal 106 and the controller 300 are connected by a power cable 401. As described above, three terminals 106 are provided. One terminal 106 and the controller 300 are connected by one power cable 401. Three power cables 401 are provided. Five signal cables 402 are provided.
  • the torsion motor 200 is arranged so that the rotation axis of the rotor 202 and the rotor shaft 203 extends in the front-rear direction.
  • the fan 211 is arranged forward of the stator 201.
  • the terminal 206 that connects the multiple coils of the stator 201 is arranged at the bottom of the stator 201.
  • the sensor board 209 that detects the rotation of the rotor 202 is arranged behind the stator 201.
  • the terminal 206 and the controller 300 are connected by a power cable 403. As described above, three terminals 206 are provided. One terminal 206 and the controller 300 are connected by one power cable 403. Three power cables 403 are provided. Five signal cables 404 are provided.
  • 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. Power is output from the battery 10 to the controller 300 via the power supply cables 405.
  • the controller 300 and the trigger 28 are connected by a signal cable 406.
  • One signal cable 406 is provided.
  • An operation signal generated in the trigger switch 34 (see FIG. 4) by operating the trigger 28 is transmitted from the trigger switch 34 to the controller 300 via the signal cable 406.
  • 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.
  • the rotor 102 of the feed motor 100 rotates.
  • a detection signal from the sensor board 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 board 109.
  • 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 torsion motor 200.
  • the rotor 202 of the torsion motor 200 rotates.
  • a detection signal from the sensor board 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 torsion motor 200 based on the detection signal from the sensor board 209.
  • the rebar binding machine 2 includes the feed motor 100 which is a first brushless motor that feeds the wire wound around the reel 24, the torsion motor 200 which is a second brushless motor that twists the wire fed by the feed motor 100, the head unit 4 in which the reel 24, the feed motor 100, and the torsion motor 200 are arranged, the grip unit 6 which extends downward from the head unit 4, the foot unit 8 which is arranged below the grip unit 6 and to which the battery 10 is connected, and the controller 300 which controls the feed motor 100 and the torsion motor 200.
  • the controller 300 is arranged in the grip unit 6.
  • the controller 300 is placed in an appropriate position in the rebar binding machine 2.
  • FIG. 13 is a schematic diagram showing an example of the arrangement of the controller 300 according to this embodiment.
  • the controller 300 is arranged in the head unit 4.
  • the controller 300 is arranged below the feed motor 100 and the torsion motor 200.
  • the controller 300 is arranged in the head unit 4 so that the circuit board 301 extends in the front-rear direction.
  • the controller 300 is arranged in the head unit 4 so 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 leftward.
  • the controller 300 may also be arranged in the head unit 4 so that the first surface 301A of the circuit board 301 faces rightward.
  • the first control circuit 310 which includes 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.
  • the second control circuit 320 which includes a gate drive circuit 322 and an inverter circuit 323 for controlling the torsion motor 200, is mounted on the rear side of the circuit board 301.
  • the first control circuit 310 for controlling the feed motor 100 is mounted on the front side of the circuit board 301
  • the second control circuit 320 for controlling the torsion motor 200 is mounted on the rear side of the circuit board 301. This allows the lengths of the power cable 401, the signal cable 402, the power cable 403, and the signal cable 404 to be shortened.
  • FIG. 14 is a schematic diagram showing an example of the arrangement of the controller 300 according to this embodiment.
  • the controller 300 is arranged in the head unit 4.
  • the controller 300 is arranged below the feed motor 100 and the torsion motor 200.
  • the controller 300 is arranged in the head unit 4 so that the circuit board 301 extends in the front-rear direction.
  • the controller 300 is arranged in the head unit 4 so 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.
  • the controller 300 may also be arranged in the head unit 4 so that the first surface 301A of the circuit board 301 faces downward.
  • the first control circuit 310 which includes 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.
  • the second control circuit 320 which includes a gate drive circuit 322 and an inverter circuit 323 for controlling the torsion motor 200, is mounted on the rear side of the circuit board 301.
  • the first control circuit 310 for controlling the feed motor 100 is mounted on the front side of the circuit board 301
  • the second control circuit 320 for controlling the torsion motor 200 is mounted on the rear side of the circuit board 301. This allows the lengths of the power cable 401, the signal cable 402, the power cable 403, and the signal cable 404 to be shortened.
  • FIG. 15 is a schematic diagram showing an example of the arrangement of the controller 3000 according to this embodiment.
  • the controller 3000 is arranged in the grip portion 6.
  • the circuit board 3010 of the controller 3000 has a holding portion 330 that holds 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.
  • the signal cable 406 is omitted.
  • FIG. 16 is a schematic diagram showing an example of the arrangement of the controller 300 according to this embodiment.
  • at least one of the feed motor 100 (first brushless motor) and the torsion motor 200 (second brushless motor) has a sensor board that detects the rotation of the rotor, and the sensor board has an inverter circuit for driving the motor.
  • FIG. 16 shows an example in which inverter circuits 313, 323 are provided on both the sensor board 109 of the feed motor 100 and the sensor board 209 of the torsion motor 200.
  • the controller 300 is disposed in the grip portion 6.
  • the controller 300 is connected to the sensor board 109 of the feed motor 100 by both a power cable 401 and a signal cable 402.
  • the controller 300 is electrically connected to the stator 101 of the feed motor 100 via the sensor board 109.
  • the controller 300 is connected to the sensor board 209 of the torsion motor 200 by both a power cable 403 and a signal cable 404.
  • the controller 300 is electrically connected to the stator 201 of the torsion motor 200 via the sensor board 209.
  • FIG. 17 is an exploded perspective view of the feed motor 100 according to this embodiment, as viewed from the lower right front.
  • FIG. 18 is an exploded perspective view of the feed motor 100 according to this embodiment, as viewed from the upper right front.
  • the sensor board 109 is attached to the stator 101.
  • the circuit board portion 109A of the sensor board 109 is provided with an inverter circuit 313.
  • the inverter circuit 313 is provided on the lower surface of the sensor board 109.
  • the inverter circuit 313 includes six switching elements that control the current supply to each of the U-phase coil, the V-phase coil, and the W-phase coil.
  • the inverter circuit 313 is connected to the controller 300 (gate drive circuit 312) via a power cable 401 and a signal cable 402 that are connected to the sensor board 109.
  • the inverter circuit 313 is connected from the sensor board 109 to each coil 105 (U-phase coil, V-phase coil, W-phase coil) of the stator 101 by wiring that is not shown. Therefore, in the example of FIG. 17 and FIG. 18, terminals 106 (see FIG. 7) for supplying power to each coil 105 are not provided.
  • FIG. 19 is an exploded perspective view of the torsion motor 200 according to this embodiment, as viewed from the upper left rear.
  • FIG. 20 is an exploded perspective view of the torsion motor 200 according to this embodiment, as viewed from the upper left front.
  • the sensor board 209 is attached to the stator 201.
  • the circuit board section 209A of the sensor board 209 is provided with an inverter circuit 323.
  • the inverter circuit 323 is provided on the rear surface of the sensor board 209.
  • the inverter circuit 323 includes six switching elements that control the current supply to each of the U-phase coil, V-phase coil, and W-phase coil.
  • the inverter circuit 323 is connected to the controller 300 (gate drive circuit 322) via a power cable 403 and a signal cable 404 that are connected to the sensor board 209.
  • the inverter circuit 323 is connected from the sensor board 209 to each coil 205 (U-phase coil, V-phase coil, and W-phase coil) of the stator 201 by wiring that is not shown. Therefore, in the example of FIG. 19 and FIG. 20, terminals 206 (see FIG. 7) for supplying power to each coil 205 are not provided.
  • FIG. 21 is a front view showing the controller 300 according to this embodiment.
  • the controller 300 includes a first control circuit 310 that controls the feed motor 100, and a second control circuit 320 that controls the torsion motor 200.
  • the first control circuit 310 and the second control circuit 320 are each mounted on the first surface 301A of the circuit board 301.
  • the first control circuit 310 includes a microcomputer 311, a gate drive circuit 312, and a capacitor 314.
  • the controller 300 since the inverter circuit 313 is provided on the sensor board 109, the controller 300 (first control circuit 310) does not include the inverter circuit 313.
  • the gate drive circuit 312 drives the inverter circuit 313 of the sensor board 109 via a signal cable 402.
  • the second control circuit 320 includes a microcomputer 321, a gate drive circuit 322, and a capacitor 324.
  • the controller 300 since the inverter circuit 323 is provided on the sensor board 209, the controller 300 (second control circuit 320) does not include the inverter circuit 323.
  • the gate drive circuit 322 drives the inverter circuit 323 of the sensor board 209 via a signal cable 404.
  • the sensor board 109 of the feed motor 100 (first brushless motor) and the sensor board 209 of the torsion motor 200 (second brushless motor) are provided with inverter circuits 313 and 323 for driving the motors, but an inverter circuit may be provided on only one of the sensor boards. Also, part of the inverter circuit may be provided in the controller 300.
  • the controller 300 is placed in the grip section 6. This allows the controller 300 to be placed in an appropriate position in the rebar binding machine 2.
  • the feed motor 100 which is a first brushless motor
  • has a sensor board 109 which is a first sensor board that detects the rotation of the rotor 102.
  • the sensor board 109 has an inverter circuit 313 for driving the motor. This allows the connection of a power cable 401 that supplies drive current to the feed motor 100 and a signal cable 402 for signal transmission to be consolidated on the sensor board 109. There is no need to provide a terminal for connecting the power cable 401 to the feed motor 100. Since there are fewer restrictions on placement due to wiring processing, the freedom of placement of the controller 300 is improved.
  • the torsion motor 200 which is the second brushless motor, has a sensor board 209, which is a second sensor board that detects the rotation of the rotor 202.
  • the sensor board 209 has an inverter circuit 323 for driving the motor. This allows the connection of the power cable 403 that supplies drive current to the torsion motor 200 and the signal cable 404 for signal transmission to be consolidated on the sensor board 209. It is not necessary to provide a terminal for connecting the power cable 403 to the torsion motor 200. Since there are fewer restrictions on placement due to wiring processing, the freedom of placement of the controller 300 is improved.
  • FIG. 22 is a schematic diagram showing an example of the arrangement of the controller 300 according to this embodiment.
  • the controller 300 is arranged in the head unit 4.
  • the controller 300 is arranged below the feed motor 100 and the torsion motor 200.
  • the controller 300 is arranged in the head unit 4 so that the circuit board 301 extends in the front-rear direction.
  • the controller 300 is arranged in the head unit 4 so 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 leftward.
  • the controller 300 may also be arranged in the head unit 4 so that the first surface 301A of the circuit board 301 faces rightward.
  • the sensor board 109 is disposed below the stator 101 of the feed motor 100.
  • a first control circuit 310 including a 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 disposed on the circuit board 301 at a position on the sensor board 109 side.
  • the sensor board 109 is disposed above the first control circuit 310.
  • the sensor board 109 is provided with an inverter circuit 313 for controlling the feed motor 100. Therefore, the first control circuit 310 is not provided with an inverter circuit 313.
  • the sensor board 209 is disposed behind the stator 201 of the torsion motor 200.
  • the second control circuit 320 which includes a gate drive circuit 322 for controlling the torsion motor 200, is mounted on the rear side of the circuit board 301.
  • the second control circuit 320 is disposed at a position on the circuit board 301 close to the sensor board 209.
  • the sensor board 209 is disposed above the second control circuit 320.
  • the sensor board 209 is provided with an inverter circuit 323 for controlling the torsion motor 200. Therefore, the second control circuit 320 is not provided with an inverter circuit 323.
  • the first surface 301A of the circuit board 301 and the sensor board 109 are connected by a power cable 401 and a signal cable 402.
  • the sensor board 109 and the stator 101 are connected by wiring.
  • the inverter circuit 313 is driven by the gate drive circuit 312 to supply 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 board 109.
  • the first surface 301A of the circuit board 301 and the sensor board 209 are connected by a power cable 403 and a signal cable 404.
  • the sensor board 209 and the stator 201 are connected by wiring.
  • the inverter circuit 323 is driven by the gate drive circuit 322 to supply power from the power cable 403 to each coil 205 (U-phase coil, V-phase coil, W-phase coil) of the torsion motor 200 via the wiring of the sensor board 209.
  • the torsion motor 200 is disposed behind the feed motor 100.
  • the sensor board 109 is provided with an inverter circuit 313 for controlling the feed motor 100.
  • the sensor board 209 is provided with an inverter circuit 323 for controlling the torsion motor 200.
  • the first surface 301A of the circuit board 301 and the sensor board 109 of the feed motor 100 are connected by a power cable 401 and a signal cable 402.
  • the first surface 301A of the circuit board 301 and the sensor board 209 of the torsion motor 200 are connected by a power cable 403 and a signal cable 404.
  • the first control circuit 310 for controlling the feed motor 100 is mounted on the front side of the circuit board 301.
  • the second control circuit 320 for controlling the torsion motor 200 is mounted on the rear side of the circuit board 301. This allows the lengths of the power cable 401, the signal cable 402, the power cable 403, and the signal cable 404 to be shortened.
  • FIG. 23 is a schematic diagram showing an example of the arrangement of the controller 300 according to this embodiment.
  • the controller 300 is arranged in the head unit 4.
  • the controller 300 is arranged below the feed motor 100 and the torsion motor 200.
  • the controller 300 is arranged in the head unit 4 so that the circuit board 301 extends in the front-rear direction.
  • the controller 300 is arranged in the head unit 4 so 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.
  • the controller 300 may also be arranged in the head unit 4 so that the first surface 301A of the circuit board 301 faces downward.
  • the sensor board 109 is disposed below the stator 101 of the feed motor 100.
  • the first control circuit 310 which includes a 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 disposed in a position closer to the sensor board 109 than the second control circuit 320.
  • the sensor board 109 is disposed below the first control circuit 310, and the sensor board 109 and the first control circuit 310 are arranged vertically.
  • the sensor board 109 is provided with an inverter circuit 313 for controlling the feed motor 100. Therefore, the first control circuit 310 is not provided with an inverter circuit 313.
  • the sensor board 209 is disposed behind the stator 201 of the torsion motor 200.
  • the second control circuit 320 which includes a gate drive circuit 322 for controlling the torsion motor 200, is mounted on the rear side of the circuit board 301.
  • the second control circuit 320 is disposed in a position closer to the sensor board 209 than the first control circuit 310.
  • the sensor board 209 is disposed above the second control circuit 320, with the sensor board 209 and the second control circuit 320 lined up vertically.
  • the sensor board 209 is provided with an inverter circuit 323 for controlling the torsion motor 200. Therefore, the second control circuit 320 is not provided with an inverter circuit 323.
  • the first surface 301A of the circuit board 301 and the sensor board 109 are connected by a power cable 401 and a signal cable 402.
  • the first surface 301A of the circuit board 301 and the sensor board 209 are connected by a power cable 403 and a signal cable 404.
  • the torsion motor 200 is disposed behind the feed motor 100.
  • the sensor board 109 is provided with an inverter circuit 313 for controlling the feed motor 100.
  • the sensor board 209 is provided with an inverter circuit 323 for controlling the torsion motor 200.
  • the first surface 301A of the circuit board 301 is connected to the sensor board 109 by a power cable 401 and a signal cable 402.
  • the first surface 301A of the circuit board 301 is connected to the sensor board 209 by a power cable 403 and a signal cable 404.
  • the first control circuit 310 for controlling the feed motor 100 is mounted at a position closer to the sensor board 109 than the second control circuit 320.
  • the second control circuit 320 for controlling the torsion motor 200 is mounted at a position closer to the sensor board 209 than the first control circuit 310. This allows the lengths of the power cable 401, the signal cable 402, the power cable 403, and the signal cable 404 to be shortened.
  • FIG. 24 is a schematic diagram showing an example of the arrangement of the controller 3000 according to this embodiment.
  • the controller 3000 is arranged in the grip portion 6.
  • the circuit board 3010 of the controller 3000 has a holding portion 330 that holds 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.
  • the signal cable 406 is omitted.
  • a sensor board 109 is disposed on the feed motor 100.
  • the sensor board 109 is provided with an inverter circuit 313 for controlling the feed motor 100. Therefore, the first control circuit 310 is not provided with an inverter circuit 313.
  • a sensor board 209 is disposed on the torsion motor 200. The sensor board 209 is provided with an inverter circuit 323 for controlling the torsion motor 200. Therefore, the second control circuit 320 is not provided with an inverter circuit 323.
  • the circuit board 3010 and the sensor board 109 are connected by a power cable 401 and a signal cable 402.
  • the controller 3000 controls the drive of the feed motor 100 via the sensor board 109.
  • the circuit board 3010 and the sensor board 209 are connected by a power cable 403 and a signal cable 404.
  • the controller 3000 controls the drive of the torsion motor 200 via the sensor board 209.
  • the sensor board 109 is provided with an inverter circuit 313 for controlling the feed motor 100.
  • the sensor board 209 is provided with an inverter circuit 323 for controlling the torsion motor 200.
  • the inverter circuits 313, 323 can be omitted from the circuit board 3010 of the controller 3000. As there are less restrictions on placement due to wiring processing, the degree of freedom in placement of the controller 300 is improved.
  • FIG. 25 is a schematic diagram showing an example of the placement of the controller 3001 according to this embodiment.
  • the controller 3001 is placed on the foot portion 8.
  • the controller 3001 is placed on the foot portion 8 so that the circuit board 3011 extends in the front-to-rear direction.
  • the controller 3001 is placed on the foot portion 8 so 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.
  • a sensor board 109 is disposed on the feed motor 100.
  • the sensor board 109 is provided with an inverter circuit 313 for controlling the feed motor 100. Therefore, the first control circuit 310 is not provided with an inverter circuit 313.
  • a sensor board 209 is disposed on the torsion motor 200. The sensor board 209 is provided with an inverter circuit 323 for controlling the torsion motor 200. Therefore, the second control circuit 320 is not provided with an inverter circuit 323.
  • the circuit board 3011 and the sensor board 109 are connected by a power cable 401 and a signal cable 402.
  • the controller 3001 controls the drive of the feed motor 100 via the sensor board 109.
  • the circuit board 3011 and the sensor board 209 are connected by a power cable 403 and a signal cable 404.
  • the controller 3001 controls the drive of the torsion motor 200 via the sensor board 209.
  • the controller 3001 has a circuit board 3011, a controller case 3020 that houses the circuit board 3011, and a terminal 3030 that connects the battery 10 and the circuit board 3011.
  • the controller 3001 (circuit board 3011) is directly connected to the battery 10 by the terminal 3030. Therefore, in this embodiment, the power supply cable 405 is omitted.
  • the controller case 3020 has a flat dish-like or tray-like shape with a concave upper surface.
  • the controller case 3020 houses a circuit board 3011 inside the concave portion.
  • the controller case 3020 is housed in a housing 12 that constitutes the foot portion 8.
  • the lower surface of the controller case 3020 constitutes part of the connection surface with the battery 10 in the foot portion 8.
  • a 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 case 3020 exposes a part of the terminal 3030 so that it can be connected to the terminal of the battery 10.
  • a guide 3040 may be formed on the lower surface of the controller case 3020.
  • the guide 3040 partially covers the terminal 3030 to protect it from the outside, and also guides the battery 10 when connecting the terminal of the battery 10 to the terminal 3030.
  • the bottom surface of the controller case 3020, the terminals 3030, and the guides 3040 are covered by the housing of the battery 10 and are not exposed to the outside.
  • the rebar tying machine 2 includes the feed motor 100, which is a first brushless motor that feeds the wire wound on the reel 24, the torsion motor 200, which is a second brushless motor that twists the wire, the head unit 4 in which the reel 24, the feed motor 100, and the torsion motor 200 are arranged, the grip unit 6 that extends downward from the head unit 4, the foot unit 8 that is arranged below the grip unit 6 and to which the battery 10 is connected, and a controller 3001 that controls the feed motor 100 and the torsion motor 200.
  • the controller 3001 is arranged in the foot unit 8, and the controller 3001 has a circuit board 3011, a controller case 3020 that houses the circuit board 3011, and a terminal 3030 that connects the battery 10 and the circuit board 3011.
  • the controller 3001 is placed in an appropriate position in the rebar binding machine 2.
  • the power supply cable 405 can be omitted, simplifying the internal structure of the device.
  • FIG. 26 is a diagram showing a schematic example of the arrangement of the controller 300 according to this embodiment.
  • the tenth embodiment further includes a wireless communication unit 500, a heat sink (315, 325), and a noise removal member 510 in addition to the configuration shown in the first embodiment described above.
  • the wireless communication unit 500 is disposed in the grip portion 6.
  • the wireless communication unit 500 is disposed in the grip portion 6 so as to overlap the circuit board 301 of the controller 300 in the left-right direction.
  • the wireless communication unit 500 is disposed to the left of the circuit board 301 in the grip portion 6.
  • the wireless communication unit 500 is disposed between the circuit board 301 and the left housing 14.
  • the wireless communication unit 500 may be disposed to the right of the circuit board 301 in the grip portion 6.
  • the wireless communication unit 500 is disposed between the circuit board 301 and the right housing 16.
  • the wireless communication unit 500 may be detachable from the housing 12.
  • an attachment port for attaching the wireless communication unit 500 may be 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 may be attached to the attachment port from outside the housing 12. In this configuration, the wireless communication unit 500 is attached to the attachment port to establish an electrical connection with the controller 300.
  • the wireless communication unit 500 may be provided in the head portion 4, the foot portion 8, or the battery 10.
  • the wireless communication unit 500 can be connected to the controller 300 by wire or can be 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 external devices via the wireless communication unit 500.
  • the wireless communication unit 500 has an interface circuit for performing wireless communication.
  • the wireless communication method is not particularly limited.
  • the wireless communication unit 500 performs communication by, for example, short-range wireless communication such as Bluetooth (registered trademark), WLAN communication such as Wi-Fi (registered trademark), microwaves, infrared rays (optical signals), mobile communication systems such as so-called 5G, and the like.
  • the wireless communication unit 500 can communicate with other communication terminals, for example, computers, mobile devices, cloud servers, other power tools such as rebar tying machines, external battery units, and the like, by wireless communication.
  • the wireless communication unit 500 communicates with a terminal (such as a tablet terminal or PC) for managing the user's own power tools, including the rebar tying machine 2.
  • the controller 300 can transmit information about the rebar tying machine 2 via the wireless communication unit 500.
  • the information about the rebar tying machine 2 can include, for example, information about the remaining power of the battery 10, the voltage value, the current value, and the like.
  • the information about the rebar tying machine 2 can include, for example, information about each motor of the rebar tying machine 2 or log data.
  • the information about each motor can include the motor rotation speed, torque, rotation direction, and the like.
  • the information about the rebar tying machine 2 can include the current settings (operation mode, etc.) of the rebar tying machine 2.
  • the information about the rebar tying machine 2 can include, for example, the cumulative number of times rebars have been tied, or the remaining amount of wire wound on the reel 24 (remaining number of times tying).
  • the controller 300 can count the number of times rebars have been tied from the drive information about the feed motor 1000, and calculate the remaining number of times tying by subtracting the count value from the initial value of the number of times tying set on the reel 24.
  • the controller 300 may periodically transmit information about the rebar binding machine 2 to a set destination, or may transmit information about the rebar binding machine 2 as a response signal in response to a request from the destination.
  • the controller 300 may receive control signals via the wireless communication unit 500.
  • the control signals may include information to instruct the rebar binding machine 2 to be powered on/off, information to instruct a change in operating mode, and the like.
  • the controller 300 controls each part of the rebar binding machine 2 according to the received control signals.
  • FIG. 27 is a schematic perspective view showing a controller 300 according to this embodiment.
  • the controller 300 includes a circuit board 301 having 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 thermally conductive grease, thermally conductive adhesive, or the like, 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 having a heat transfer surface that contacts a heat absorption target such as a switching element, and a plurality of fins 315A rising from the main body.
  • the fins 315A have a plate-like, pin-like, lattice-like, or other shape, and increase the heat dissipation area of the heat sink 315.
  • 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 in which multiple switching elements are packaged. In this case, a heat sink 315 may be provided for each power module.
  • 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 thermally conductive material.
  • the thermally conductive material is thermally conductive grease, thermally 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 that contacts a heat absorption target such as a switching element, and a plurality of fins 325A rising from the main body.
  • the fins 325A have a plate-like, pin-like, lattice-like shape, etc., and increase the heat dissipation area of the heat sink 325.
  • the heat sink 325 is made of a highly thermally conductive material such as aluminum (aluminum or aluminum alloy).
  • One heat sink 325 may be provided for one switching element, or one may be provided for multiple switching elements.
  • the inverter circuit 323 may include, for example, one or two power modules in which multiple switching elements are packaged. In this case, a heat sink 325 can be installed for each power module.
  • the rebar binding machine 2 has a noise removal member 510 that removes electromagnetic noise on the power line connecting at least one of the feed motor 1000 (first brushless motor) and the torsion motor 2000 (second brushless motor) to the controller 300.
  • the noise removal member 510 is provided in common for multiple wirings.
  • the noise removal member 510 is a plate-shaped member in which multiple through holes 511 are formed to pass the wirings through. One wiring is inserted into each through hole 511.
  • the noise removal member 510 is an oval flat plate, and has three through holes 511 that penetrate in the thickness direction.
  • the three through holes 511 are linearly arranged in the long axis direction of the noise removal member 510 in a plan view.
  • the noise removal member 510 is made of a ferromagnetic material.
  • the noise removal member 510 is, for example, a permanent magnet.
  • the first noise removal member 510 is provided on the power cable 401 that supplies power to the feed motor 1000.
  • the first noise removal member 510 has three through holes 511 through which the three power lines (U-phase, V-phase, and W-phase power lines) included in the power cable 401 are inserted.
  • the second noise removal member 510 is provided on the power cable 403 that supplies power to the torsion motor 2000.
  • the second noise removal member 510 has three through holes 511 through which the three power lines (U-phase, V-phase, and W-phase power lines) included in the power cable 403 are inserted.
  • FIG 28 is an exploded perspective view of the feed motor 1000 according to this embodiment, as viewed from the lower right front.
  • Figure 29 is an exploded perspective view of the feed motor 1000 according to this embodiment, as viewed from the upper right front.
  • the feed motor 100 is an IPM (Interior Permanent Magnet) motor in which the rotor magnet 108 is disposed in a magnet hole provided in the rotor core 107, but in the example shown in Figures 28 and 29, the feed motor 1000 is an SPM (Surface Permanent Magnet) motor in which the rotor magnet 1080 is disposed on the outer circumferential surface of the rotor core 1070.
  • IPM Interior Permanent Magnet
  • SPM Surface Permanent Magnet
  • the rotor 1020 of the feed motor 1000 has a rotor core 1070, a rotor magnet 1080, and a holding 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 curved 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 adhesive or the like.
  • 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 four.
  • the number of rotor magnets 1080 is not particularly limited and may be other than four.
  • the holding tube 1021 has a cylindrical shape.
  • the holding tube 1021 surrounds the outer periphery of each rotor magnet 1080.
  • the inner circumferential surface of the holding tube 1021 presses the outer surface of each rotor magnet 1080 toward the rotor core 1070 (toward the center in the radial direction).
  • the holding tube 1021 prevents the rotor magnet 1080 from separating from the rotor core 1070.
  • the holding tube 1021 is made of steel, resin, or the like.
  • Figure 30 is an exploded perspective view of the torsion motor 2000 according to this embodiment, as viewed from the upper left rear.
  • Figure 31 is an exploded perspective view of the torsion motor 2000 according to this embodiment, as viewed from the upper left front.
  • the torsion motor 2000 is an IPM motor, but in the example shown in Figures 30 and 31, the torsion motor 2000 is an SPM motor in which the rotor magnet 2080 is disposed on the outer peripheral surface of the rotor core 2070.
  • the rotor 2020 of the torsion motor 2000 has a rotor core 2070, a rotor magnet 2080, and a holding 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 curved 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 adhesive or the like.
  • four rotor magnets 2080 are arranged in the circumferential direction of the rotor core 2070.
  • the number of poles of the torsion motor 2000 is four.
  • the number of rotor magnets 2080 is not particularly limited and may be other than four.
  • the holding tube 2021 has a cylindrical shape.
  • the holding tube 2021 surrounds the outer periphery of each rotor magnet 2080.
  • the inner circumferential surface of the holding tube 2021 presses the outer surface of each rotor magnet 2080 toward the rotor core 2070.
  • the holding tube 2021 prevents the rotor magnets 2080 from separating from the rotor core 2070.
  • the holding tube 2021 is made of steel, resin, or the like.
  • the feed motor 100 and the torsion motor 200 may be replaced with the feed motor 1000 and the torsion motor 2000 shown in Figures 28 to 31.
  • the controller 300 includes a circuit board 301 having an inverter circuit 313 for driving the feed motor 1000, which is a first brushless motor, and a heat sink 315 thermally connected to the inverter circuit 313.
  • the above configuration prevents the temperature of the controller 300 from rising.
  • the controller 300 includes a circuit board 301 having an inverter circuit 323 for driving the torsion motor 200, which is the second brushless motor, and a heat sink 325 thermally connected to the inverter circuit 323.
  • the above configuration prevents the temperature of the controller 300 from rising.
  • the circuit board 301 includes heat sinks 315, 325 thermally connected to at least one of the inverter circuit 313, which is the first inverter circuit, and the inverter circuit 323, which is the second inverter circuit.
  • the above configuration prevents the temperature of the controller 300 from rising.
  • the rebar tying machine 2 further includes a wireless communication unit 500 provided in the grip portion 6.
  • the wireless communication unit 500 and the controller 300 are positioned in an appropriate positional relationship.
  • the rebar binding machine 2 has a noise removal member 510 that removes electromagnetic noise on the power line of the power cable 401 that connects the feed motor 1000, which is the first brushless motor, and the controller 300.
  • the rebar binding machine 2 has a noise removal member 510 that removes electromagnetic noise on the power line of the power cable 403 that connects the torsion motor 2000, which is the second brushless motor, and the controller 300.
  • the brushless motor (feed motor 1000, torsion motor 2000) and controller 300 are positioned in an appropriate positional relationship, and the effects of electromagnetic noise can be suppressed.
  • FIG. 32 is a schematic diagram showing an example of the arrangement of the controller 300 according to this embodiment.
  • the eleventh embodiment further includes a wireless communication unit 500, a heat sink (315, 325), and a noise removal member 510 in addition to the configuration shown in the third embodiment.
  • the controller 300 is disposed in the head unit 4. In the head unit 4, the controller 300 is disposed below the feed motor 100 and the torsion motor 200. The controller 300 is disposed in the head unit 4 so that the circuit board 301 extends in the front-to-rear direction. The controller 300 is disposed in the head unit 4 so 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. The controller 300 may also be disposed in the head unit 4 so that the first surface 301A of the circuit board 301 faces downward.
  • 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). In FIG. 32, separate heat sinks 315, 325 are provided for the inverter circuit 313 and the inverter circuit 323.
  • the first control circuit 310 is mounted on the front side of the circuit board 301.
  • the inverter circuit 313 of the first control circuit 310 is provided with a heat sink 315.
  • the heat sink 315 is in contact with the surface of the switching element constituting the inverter circuit 313 via a thermal conductive material.
  • the second control circuit 320 is mounted on the rear side of the circuit board 301.
  • the inverter circuit 323 of the second control circuit 320 is provided with a heat sink 325.
  • the heat sink 325 is in contact with the surface of the switching element constituting the inverter circuit 323 via a thermal 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.
  • the wireless communication unit 500 is disposed in the grip portion 6.
  • the wireless communication unit 500 is connected to the controller 300 via a wired connection.
  • the wireless communication unit 500 is connected to the second surface 301B of the circuit board 301 via a 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.
  • the first surface 301A of the circuit board 301 and the feed motor 100 are connected by a power cable 401.
  • the first noise removal member 510 is provided on the power cable 401 that supplies 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 inserted into the three through holes 511 (see FIG. 27) of the first noise removal member 510.
  • the first surface 301A of the circuit board 301 and the torsion motor 200 are connected by a power cable 403.
  • the second noise removal member 510 is provided on the power cable 403 that supplies power to the torsion motor 200.
  • the second noise removal member 510 is disposed between the first surface 301A of the circuit board 301 and the torsion motor 200.
  • the three power lines (U-phase, V-phase, and W-phase power lines) included in the power cable 403 are inserted through the three through holes 511 (see FIG. 27) of the second noise removal member 510.
  • a wireless communication unit 500 heat sinks 315, 325, and a noise removal member 510 may be provided.
  • FIG. 33 is a diagram showing a schematic example of the arrangement of the controller 3001 according to this embodiment.
  • the twelfth embodiment further includes a wireless communication unit 500, heat sinks 315 and 325, and a noise removal member 510 in addition to the configuration shown in the ninth embodiment.
  • the controller 3001 is placed on the foot portion 8.
  • the controller 3001 is placed on the foot portion 8 so that the circuit board 3011 extends in the front-to-rear direction.
  • the controller 3001 is placed on the foot portion 8 so 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.
  • the sensor board 109 is disposed on the feed motor 100.
  • the sensor board 109 is provided with an inverter circuit 313 for controlling the feed motor 100. Therefore, the first control circuit 310 is not provided with the inverter circuit 313.
  • the inverter circuit 313 of the sensor board 109 is provided with a heat sink 315.
  • 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 sensor board 209 is disposed on the torsion motor 200.
  • the sensor board 209 is provided with an inverter circuit 323 for controlling the torsion motor 200. Therefore, the second control circuit 320 is not provided with the inverter circuit 323.
  • the inverter circuit 323 of the sensor board 209 is provided with a heat sink 325.
  • the heat sink 325 is in contact with the surface of the switching element constituting the inverter circuit 323 via a thermally conductive material.
  • the wireless communication unit 500 is disposed in the grip portion 6.
  • the wireless communication unit 500 is connected to the controller 300 via a connection cable 409.
  • the circuit board 3011 and the sensor board 109 are connected by a power cable 401 and a signal cable 402.
  • a first noise removal member 510 is provided on the power cable 401.
  • the first noise removal member 510 is disposed between the circuit board 3011 and the sensor board 109.
  • the three power lines (U-phase, V-phase, and W-phase power lines) included in the power cable 401 are inserted into the three through holes 511 (see Figure 27) of the first noise removal member 510.
  • the circuit board 3011 and the sensor board 209 are connected by a power cable 403 and a signal cable 404.
  • a second noise removal member 510 is provided on the power cable 403.
  • the second noise removal member 510 is disposed between the circuit board 3011 and the sensor board 209.
  • the three power lines (U-phase, V-phase, and W-phase power lines) included in the power cable 403 are inserted through the three through holes 511 (see FIG. 27) of the second noise removal member 510.
  • a rotor for rotating a rotor of a vehicle comprising: a rotor having a first end and a second end, and a second end of the rotor, the rotor being arranged to be in a position parallel to the rotor; a first end of the rotor being in a position parallel to the rotor; a second end of the rotor being in a position parallel to the rotor; a second end of the rotor being in a position parallel to the rotor; 178...hook, 180...side plate, 184...side plate, 188...elastic cover, 190...elastic cover, 200...torsion 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 board, 209A...circuit board section, 209B...support section, 210...magnetic

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Basic Packing Technique (AREA)

Abstract

Cette machine de fixation de barre d'armature comprend : un premier moteur sans balai qui alimente un fil enroulé sur une bobine ; un second moteur sans balai qui tord le fil ; une section de tête dans laquelle la bobine, le premier moteur sans balai et le second moteur sans balai sont disposés ; une section de préhension s'étendant vers le bas à partir de la section de tête ; une section de base qui est disposée au-dessous de la section de préhension et qui a une batterie reliée à celle-ci ; et un dispositif de commande qui commande le premier moteur sans balai et le second moteur sans balai. Le dispositif de commande est disposé dans la section de préhension.
PCT/JP2023/029235 2022-10-12 2023-08-10 Machine de fixation de barre d'armature WO2024079973A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2022163790 2022-10-12
JP2022-163790 2022-10-12

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WO2024079973A1 true WO2024079973A1 (fr) 2024-04-18

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PCT/JP2023/029235 WO2024079973A1 (fr) 2022-10-12 2023-08-10 Machine de fixation de barre d'armature

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009274195A (ja) * 2008-05-19 2009-11-26 Max Co Ltd 鉄筋結束機における配線構造
JP2012101860A (ja) * 2012-01-30 2012-05-31 Max Co Ltd 鉄筋結束機
JP2017189052A (ja) * 2016-04-07 2017-10-12 株式会社豊田自動織機 インバータ一体形回転電機
JP2020023026A (ja) * 2018-08-08 2020-02-13 京セラ株式会社 工具、通信装置、工具システム及び通信方法
US20200238493A1 (en) * 2019-01-25 2020-07-30 Robert Bosch Tool Corporation Pneumatic Linear Fastener Driving Tool
JP2021097510A (ja) * 2019-12-17 2021-06-24 株式会社マキタ 鉄筋結束機

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009274195A (ja) * 2008-05-19 2009-11-26 Max Co Ltd 鉄筋結束機における配線構造
JP2012101860A (ja) * 2012-01-30 2012-05-31 Max Co Ltd 鉄筋結束機
JP2017189052A (ja) * 2016-04-07 2017-10-12 株式会社豊田自動織機 インバータ一体形回転電機
JP2020023026A (ja) * 2018-08-08 2020-02-13 京セラ株式会社 工具、通信装置、工具システム及び通信方法
US20200238493A1 (en) * 2019-01-25 2020-07-30 Robert Bosch Tool Corporation Pneumatic Linear Fastener Driving Tool
JP2021097510A (ja) * 2019-12-17 2021-06-24 株式会社マキタ 鉄筋結束機

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