JP2017089270A - Binding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a binding machine capable of manually adjusting a wire binding force to bind multiple objects.SOLUTION: A binding machine 1 binds multiple objects with a wire. The binding machine 1 comprises: a first jaw 12; a second jaw 14, which can move relative to the first jaw 12 and holds a wire between the second jaw and the first jaw 12; a housing 16, which rotatably supports the first and second jaws 12, 14; a handle 22, which is supported so as to move relative to the housing 16 and connected with at least one of the first and second jaws 12, 14; a motor 30, which is mounted on the housing 16 and rotates the first and second jaws 12, 14; and a lock mechanism 34, which prohibits rotation of the first and second jaws 12, 14 toward the housing 16 in at least one direction.SELECTED DRAWING: Figure 2

Description

  The technology disclosed in the present specification relates to a binding machine for binding a plurality of reinforcing bars and other objects with wires.

  Patent Document 1 discloses a binding machine that binds a plurality of reinforcing bars with wires. The binding machine of Patent Document 1 includes first and second jaws that hold a wire, a housing that rotatably supports the first and second jaws, and a motor that rotates the first and second jaws. . According to this binding machine, the user holds the wires that have been circulated around the plurality of reinforcing bars by the first and second jaws, and rotates the first and second jaws by a motor, thereby allowing the plurality of reinforcing bars to be rotated. It can be bound by a wire.

European Patent Application No. 034569

  In the binding machine of Patent Literature 1, the user binds a plurality of reinforcing bars with wires by rotating a motor. When binding a plurality of reinforcing bars with a wire, there are cases where it is desired to manually adjust the binding force of the wire. For example, there is a case where it is desired to finely adjust the binding force of the wire after binding a plurality of reinforcing bars with a wire by a motor. In this case, the user may attempt to adjust the binding force of the wire by rotating the housing instead of driving the motor while the wire is held by the first and second jaws. However, the first and second jaws are rotatably supported by the housing. For this reason, even if a user rotates a housing, a torque cannot be applied to the 1st and 2nd jaws holding a wire. That is, the user cannot manually adjust the binding force of the wires.

  A binding machine disclosed in the present specification is a binding machine that binds a plurality of reinforcing bars with wires, and is capable of moving relative to a first jaw and a first jaw. A second jaw that can hold the wire, a housing that rotatably supports the first and second jaws, a first jaw and a second jaw that are supported so as to be movable relative to the housing. A handle connected to at least one of the jaws, a motor provided on the housing and rotating the first and second jaws, and prohibiting rotation of the first and second jaws relative to the housing in at least one direction And a locking mechanism.

  In the above binding machine, a lock mechanism that prohibits rotation of the first and second jaws relative to the housing in at least one direction is provided. Thereby, the user can apply torque to the first and second jaws holding the wire by rotating the housing. That is, the user can manually adjust the binding force of the wires by rotating the housing without driving the motor.

It is a perspective view of a binding machine. It is sectional drawing along the II-II line of FIG. It is sectional drawing along the III-III line of FIG. It is sectional drawing corresponding to FIG. 2 when a lever handle is a closed position. It is an enlarged view of the broken line V part of FIG. FIG. 6 is an enlarged view corresponding to FIG. 5 when a wire is held by a tool. It is sectional drawing along the VII-VII line of FIG. It is an enlarged view of the broken line VI part of FIG. It is sectional drawing along the IX-IX line of FIG. It is a block diagram which shows the electrical structure of a binding machine. It is a flowchart of a 1st process. It is a flowchart of a 2nd process. It is a figure which shows the binding of the wire to a some rebar using a binding machine (1). It is a figure which shows the binding of the wire to a some reinforcing bar using a binding machine (2). It is a figure which shows the binding of the wire to a some reinforcing bar using a binding machine (3). It is a figure which shows the binding of the wire to a some reinforcing bar using a binding machine (4).

  In some embodiments, the locking mechanism inhibits rotation of the first and second jaws relative to the housing when the motor is stopped, and the first and second relative to the housing when the motor is operating. Two jaws may be allowed to rotate. According to this configuration, when the motor is operating, the first and second jaws are driven by the motor without being blocked by the lock mechanism. On the other hand, when the motor is stopped, the user can apply torque to the first and second jaws holding the wire by rotating the housing.

  In some embodiments, the locking mechanism may include a bi-directional clutch provided on a transmission path for transmitting torque from the motor to the first and second jaws. According to this configuration, when the motor is stopped, the rotation of the first and second jaws with respect to the housing is prohibited. Therefore, the user can apply torque to the first and second jaws holding the wire by rotating the housing. On the other hand, when the motor is operating, the first and second jaws are allowed to rotate relative to the housing. Therefore, the motor can drive the first and second jaws without being obstructed by the lock mechanism.

  In some embodiments, the bidirectional clutch may include an input shaft coupled to the motor, an output shaft coupled to the first and second jaws, and a clutch case secured to the housing. . The bidirectional clutch allows the output shaft together with the input shaft to rotate relative to the clutch case, and locks the output shaft relative to the clutch case when the output shaft rotates relative to the input shaft. According to this configuration, when the user holds the wire with the first and second jaws and rotates the housing without driving the motor, the output shaft is locked with respect to the clutch case in the bidirectional clutch. . As a result, the first and second jaws connected to the output shaft are fixed to the housing connected to the clutch case. For this reason, the user can apply torque to the first and second jaws holding the wire by rotating the housing.

  In some embodiments, the locking mechanism may include a one-way clutch that connects the first and second jaws to the housing. According to this configuration, when the user rotates the housing in one direction, rotation of the first and second jaws with respect to the housing is prohibited, thereby torqueing the first and second jaws holding the wire. Can be added.

  The binding machine according to some embodiments may further include a variable ratio transmission provided on a transmission path for transmitting torque from the motor to the first and second jaws. According to such a configuration, the torque transmitted from the motor to the first and second jaws can be changed. In general rebar binding, wires of various sizes are bound to rebars of various sizes. Depending on the size of the reinforcing bar or the size of the wire, it may be desired to change the torque transmitted to the first and second jaws. In the above binding machine, the torque transmitted to the first and second jaws can be appropriately changed.

  In the binding machine according to some embodiments, the lock mechanism may be located between the variable ratio transmission and the first and second jaws on the transmission path. According to such a configuration, the vibration of the motor transmitted to the lock mechanism can be reduced as compared with the case where the variable ratio transmission is located between the lock mechanism and the first and second jaws.

  In some embodiments, a binding machine that binds a plurality of objects with a wire is provided with a tool capable of holding the wire, a housing that rotatably supports the tool, the housing, and the tool. You may have the motor to rotate and the lock mechanism which prohibits the rotation to the at least 1 direction of the tool with respect to a housing. In the above-described binding machine, a lock mechanism that prohibits rotation of the tool with respect to the housing in at least one direction is provided. Thereby, the user can apply torque to the tool holding the wire by rotating the housing. That is, the user can manually adjust the binding force of the wires by rotating the housing without driving the motor. Note that the lock mechanism may prohibit rotation of the tool in at least one direction relative to the housing by electrically locking the rotation of the motor.

  In some embodiments, the binding machine may include a speed reduction mechanism provided on a transmission path that transmits torque from the motor to the tool. In this case, the speed reduction mechanism may be located between the motor and the lock mechanism on the transmission path. According to such a configuration, the vibration of the motor transmitted to the lock mechanism can be reduced as compared with the case where the lock mechanism is located between the motor and the speed reduction mechanism.

(Example)
Below, the binding machine 1 of an Example is demonstrated, referring drawings. The binding machine 1 is an electric tool for binding a plurality of reinforcing bars 200 with wires 300 (see FIGS. 13 to 16). The reinforcing bar 200 is arranged inside the concrete and constitutes the reinforced concrete. The binding machine 1 is not limited to the plurality of reinforcing bars 200 and can be used to bind a plurality of objects with the wires 300.

  As shown in FIG. 1, the binding machine 1 includes a tool 10, a housing 16, and a lever handle 22. The housing 16 has a generally cylindrical shape and extends along the front-rear direction. The tool 10 is rotatably attached to one end of the housing 16, and the battery attachment portion 15 is provided to the other end of the housing 16. The battery mounting portion 15 is configured so that the battery pack 2 can be attached and detached. The battery back 2 is an example of a battery. The battery pack 2 is a power source for the binding machine 1. That is, the binding machine 1 is a kind of cordless electric tool. The binding machine 1 may be a cord-type electric tool that is connected to a commercial power source (for example, an outlet) and receives power supply. The lever handle 22 is supported by a handle pin 24 and can swing (relatively move) with respect to the housing 16. The lever handle 22 is an example of a handle. Hereinafter, when viewed from the housing 16, the tool 10 side is defined as the front side 16a, and the battery mounting portion 15 side is defined as the rear side 16b. The specific configuration of the lever handle 22 is not particularly limited. For example, the lever handle 22 may be a handle or other operation member that is supported by the housing 16 so as to be linearly movable.

  The tool 10 has a first jaw 12 and a second jaw 14. The first jaw 12 and the second jaw 14 are connected to each other by a tool pin 13, and the second jaw 14 can swing (relatively move) with respect to the first jaw 12. That is, the second jaw 14 is a movable part of the tool 10 and can move in the vertical direction. In addition, the up-down direction here is a direction perpendicular | vertical to the front-back direction mentioned above (refer FIG. 1). The tool pin 13 (that is, the swing axis of the second jaw 14) extends perpendicular to the front-rear direction of the housing 16. The tool 10 can hold and release the wire 300 by opening and closing the first jaw 12 and the second jaw 14. The lever handle 22 is connected to the second jaw 14, and the second jaw 14 swings with respect to the first jaw 12 when the lever handle 22 swings with respect to the housing 16. That is, the user can open and close the first jaw 12 and the second jaw 14 by operating the lever handle 22, thereby holding and releasing the wire 300. In addition, the specific structure of the 1st jaw 12 and the 2nd jaw 14 is not specifically limited. For example, one or both of the first jaw 12 and the second jaw 14 may be configured to move relative to each other by linearly moving (for example, linearly moving in the vertical direction). Further, for example, in the initial rotation position described later, the first jaw 12 and the second jaw 14 are not in contact with each other, and the first jaw 12 and the second jaw 14 are rotated from the initial rotation position. The first jaw 12 and the second jaw 14 may be in contact with each other. According to such a configuration, the wire 300 can be held by the first jaw 12 and the second jaw 14 by the rotation of the first jaw 12 and the second jaw 14.

  An intermediate portion 16c in the front-rear direction of the housing 16 serves as a grip that is gripped with the lever handle 22 by the user. In the vicinity of the grip 16c, a main switch 18 and an operation member 20 for shifting are provided. The main switch 18 is an operation member operated by the user in order to rotate and stop the tool 10. The operation member 20 is a member operated by the user in order to switch the torque and rotation speed of the tool 10. The main switch 18 and the operation member 20 are located on the surface of the housing 16. The main switch 18 is located on the front side of the grip 16c, and the user can turn the main switch 18 on and off with, for example, the thumb while holding the grip 16c and the lever handle 22. The housing 16 is provided with a plurality of vent holes 26 at positions away from the grip 16c. Although it is an example, the main switch 18 in the present embodiment is a push button type switch and is operated in the vertical direction by the user.

  Next, the internal structure of the binding machine 1 will be described. 2, 3, and 4, the binding machine 1 is connected to the motor 30, the speed reduction mechanism 32 connected to the motor 30, the lock mechanism 34 connected to the speed reduction mechanism 32, and the lock mechanism 34. And a cylinder 38 for fixing the first jaw 12 to the spindle 36. The spindle 36 and the cylinder 38 are integrally formed. The motor 30, the speed reduction mechanism 32, the lock mechanism 34, and the spindle 36 are disposed in the housing 16. The motor 30, the speed reduction mechanism 32, the lock mechanism 34, the spindle 36, and the cylinder 38 are located on the same axis. The binding machine 1 further includes a connecting mechanism 40 that transmits the swing of the lever handle 22 to the tool 10, an opening sensor 60 for detecting the position of the lever handle 22 (ie, opening and closing of the tool 10), and a stopper mechanism 68. Prepare.

  The motor 30 is driven by power supplied from the battery pack 2. Although it is an example, the motor 30 of a present Example is a brushless motor. When the user turns on the main switch 18, the motor 30 is operated, and when the user turns off the main switch 18, the operation of the motor 30 is stopped. Torque output from the motor 30 is transmitted to the tool 10 through the speed reduction mechanism 32, the lock mechanism 34, the spindle 36, and the cylinder 38. As a result, the first jaw 12 and the second jaw 14 are rotationally driven by the motor 30. A rotation axis A of the motor 30 extends parallel to the front-rear direction of the housing 16. The motor 30 is disposed in an intermediate portion of the housing 16, that is, in the grip 16c. The grip 16c is strongly held by the user together with the lever handle 22. Accordingly, the portion that becomes the grip 16c of the housing 16 is required to have relatively high rigidity. In this regard, when the motor 30 is disposed inside the grip 16c, the grip 16c is supported by the motor 30 from the inside, whereby the rigidity of the grip 16c can be increased.

  Torque output from the motor 30 is transmitted to the speed reduction mechanism 32. The speed reduction mechanism 32 amplifies the torque from the motor 30. The speed reduction mechanism 32 can switch the speed reduction ratio (that is, the torque amplification factor) according to the operation of the operation member 20 by the user. That is, the speed reduction mechanism 32 is a kind of variable ratio transmission. The torque amplified by the speed reduction mechanism 32 is transmitted to the spindle 36 via the lock mechanism 34. The tool 10 is connected to the spindle 36. Thereby, torque is transmitted from the motor 30 to the tool 10, and the tool 10 is rotationally driven by the motor 30. Here, the lock mechanism 34 is provided to prohibit the rotation of the tool 10 (that is, the first and second jaws 12 and 14) with respect to the housing 16 when the motor 30 is stopped. As an example, the lock mechanism 34 of the present embodiment is a two-way clutch. The lock mechanism 34 prohibits rotation of the spindle 36 in both directions with respect to the housing 16 while the motor 30 is stopped. On the other hand, when the motor 30 is in operation, rotation of the spindle 36 relative to the housing 16 is not prohibited, and torque from the speed reduction mechanism 32 is transmitted to the spindle 36 via the lock mechanism 34. Details of the lock mechanism 34 will be described later.

  The connection mechanism 40 connects the second jaw 14 and the lever handle 22 to each other. The coupling mechanism 40 is configured to transmit the swing of the lever handle 22 to the second jaw 14 and not to transmit the rotation of the second jaw 14 to the lever handle 22. As shown in FIGS. 2 and 4, the lever handle 22 has an open position (FIG. 2) spaced from the intermediate portion (grip 16 c) of the housing 16 and a close position close to the intermediate portion (grip 16 c) of the housing 16. It can swing between positions (FIG. 4). When the lever handle 22 swings, the second jaw 14 connected via the coupling mechanism 40 also swings. That is, as shown in FIG. 2, when the lever handle 22 is in the open position, the second jaw 14 is separated from the first jaw 12 and the tool 10 is opened. As shown in FIG. 4, when the lever handle 22 is in the closed position, the second jaw 14 approaches the first jaw 12 and the tool 10 is closed. Even when the tool 10 is rotated by the connecting mechanism 40, the tool 10 can continue to hold the wire 300 as the user continues to hold the grip 16 c and the lever handle 22.

  The specific configuration of the coupling mechanism 40 is not particularly limited. As an example, the coupling mechanism 40 of this embodiment includes a link 42, a piston 44, a spring 46, an outer sleeve 48, a connection pin 50, a linear motion member 52, and a bearing 54. One end of the link 42 is connected to the second jaw 14. The other end of the link 42 is connected to the piston 44 via a connection pin 50. The piston 44 is disposed inside the cylinder 38 and is supported so as to be movable along the front-rear direction of the housing 16. Both ends of the connection pin 50 extend to the outside of the cylinder 38 through a long hole 38 a formed in the cylinder 38. The longitudinal direction of the long hole 38 a is parallel to the longitudinal direction of the housing 16, and the connection pin 50 is movable in the longitudinal direction of the housing 16 with respect to the cylinder 38. The connection pin 50 is fixed to the outer sleeve 48 outside the cylinder 38.

  The outer sleeve 48 extends along the outer peripheral surfaces of the cylinder 38 and the spindle 36 and is rotatable together with the cylinder 38 and the spindle 36. The linear motion member 52 is connected to the outer sleeve 48 via a bearing 54. As a result, the linear motion member 52 moves in the front-rear direction of the housing 16 together with the outer sleeve 48, while torque is not transmitted from the outer sleeve 48 to the linear motion member 52 even when the outer sleeve 48 rotates. ing. A pair of projecting portions 52 a are provided on the outer peripheral surface of the linear motion member 52. Each protrusion 52 a is located in a long hole 22 a provided in the lever handle 22. Thereby, the linear motion member 52 moves along the front-rear direction of the housing 16 (that is, the rotation axis A of the tool 10) according to the swing of the lever handle 22.

  With the above-described configuration, when the lever handle 22 swings, the linear motion member 52, the outer sleeve 48, the connection pin 50, and the piston 44 move along the front-rear direction of the housing 16. Then, the operation of the piston 44 is transmitted to the second jaw 14 via the link 42, and the second jaw 14 swings with respect to the first jaw 12. As described above, the coupling mechanism 40 converts the swing of the lever handle 22 into the linear motion of the linear motion member 52, the outer sleeve 48, the connection pin 50, and the piston 44. It is converted into the swing of the jaw 14. Here, the spring 46 is disposed between the spindle 36 and the piston 44, and urges the piston 44 toward the front side 16a. Thereby, the lever handle 22 is urged to the open position.

  The open sensor 60 is a sensor that detects whether or not the lever handle 22 is in the open position. As an example, the open sensor 60 has a Hall element and changes an output signal according to the distance from the magnet 62. The open sensor 60 is not limited to the combination of the magnet 62 and the Hall element, and can be changed to various sensors and switches. The magnet 62 is fixed to the linear motion member 52 via a plate 64. As shown in FIG. 2, when the lever handle 22 is in the open position, the open sensor 60 outputs a first signal (for example, a high level signal) when the magnet 62 approaches the open sensor 60. On the other hand, as shown in FIG. 4, when the lever handle 22 is in the closed position, the opening sensor 60 outputs a second signal (for example, a low level signal) as the magnet 62 moves away from the opening sensor 60. Note that the opening sensor 60 (Hall element) of the present embodiment outputs the second signal even when the lever handle 22 is in an intermediate position between the open position and the closed position, and the lever handle 22 is closer to the open position. Only when the first signal is output.

  An exemplary structure of the tool 10 will be described with reference to FIGS. As shown in FIGS. 5 and 6, the first jaw 12 has a first holding surface 70 and a first cut surface 72 located closer to the housing 16 than the first holding surface 70. Yes. The second jaw 14 has a second holding surface 74 and a second cut surface 76 located closer to the housing 16 than the second holding surface 74. The first holding surface 70 and the second holding surface 74 constitute a holding portion 78 that holds the wire 300, and the first cutting surface 72 and the second cutting surface 76 are wires held by the holding portion 78. The cutting part 80 which cut | disconnects 300 is comprised. As described above, when the lever handle 22 moves from the open position (FIG. 2) to the closed position (FIG. 4), the first jaw 12 and the second jaw 14 come close to each other. As a result, as shown in FIG. 6, the wire 300 is sandwiched between the first holding surface 70 and the second holding surface 74, and the end portion 300 a of the wire 300 extending out of the tool 10 is the first cut surface. 72 and the second cut surface 76 are cut (sheared). Thereby, when the tool 10 rotates, it can prevent that the edge part 300a of the wire 300 which protrudes and extends from the tool 10 becomes entangled with the binding machine 1. The tool 10 may not have a configuration in which the first and second jaws 12 and 14 have the holding surfaces 70 and 74 and the cutting surfaces 72 and 76, respectively. For example, the tool 10 may include two gripping members each having a holding surface and two cutting members that are located behind the holding member and each have a cutting surface. The number of cutting members may be one. In this case, the cutting member may also be moved by the coupling mechanism 40 to cut the wire 300 held by the gripping member.

  An exemplary structure of the stopper mechanism 68 will be described with reference to FIG. The stopper mechanism 68 is disposed in the vicinity of the outer sleeve 48. As shown in FIG. 7, the stopper mechanism 68 includes a stopper member 82. The stopper member 82 is supported by a pin 82 a and can swing with respect to the housing 16. The distal end 82 b of the stopper member 82 is in contact with the outer peripheral surface of the outer sleeve 48. On the outer peripheral surface of the outer sleeve 48, a stopper surface 48 a that comes into contact with the tip 82 b of the stopper member 82 is provided. The normal vector of the stopper surface 48a faces the circumferential direction of the outer sleeve 48 (tangential direction of the outer circumferential surface). When the outer sleeve 48 (that is, the tool 10) rotates in the forward direction (counterclockwise in FIG. 7), the stopper member 82 does not contact the stopper surface 48a. Thus, the outer sleeve 48 (ie, tool 10) can freely rotate in one direction. On the other hand, when the outer sleeve 48 (ie, the tool 10) rotates in the other direction (clockwise in FIG. 7), the stopper member 82 abuts against the stopper surface 48a, and at that time, the outer sleeve 48 (ie, the tool 10). 10) rotation is prohibited. Hereinafter, the rotational position of the tool 10 when the stopper member 82 contacts the stopper surface 48a is referred to as an initial rotational position. That is, the stopper mechanism 68 allows the tool 10 to rotate in one direction (forward direction) beyond the initial rotation position, while the tool 10 rotates in the other direction (reverse direction) beyond the initial rotation position. It is forbidden. Here, when the tool 10 is in the initial rotation position, the swing axis of the second jaw 14 relative to the first jaw 12 and the swing axis of the lever handle 22 relative to the housing 16 are parallel to each other. A spring (not shown) is connected to the stopper member 82 and is biased toward the outer sleeve 48 by the spring. As described above, the stopper member 82 can inhibit the tool 10 from rotating in the reverse direction relative to the housing 16 when the tool 10 is in the initial rotation position. For this reason, even when the binding machine 1 is not provided with a lock mechanism 34 described later, the user holds the wire 300 by the first and second jaws 12 and 14 and rotates the housing 16 to rotate the motor 30. Torque can be applied to the wire 300 without driving. That is, the binding force by the wire 300 can be manually adjusted. In another embodiment, the direction in which the stopper mechanism 68 prohibits the rotation of the tool 10 may be opposite to that in the present embodiment. Thus, the direction in which the user manually applies torque to the wire 300 can be reversed according to the user's dominant hand or preference. In this case, the rotation direction of the motor 30 during the bundling process and the initial position return process, which will be described later, can be reversed from the present embodiment.

  An exemplary structure of the speed reduction mechanism 32 will be described with reference to FIG. As shown in FIG. 8, the speed reduction mechanism 32 includes the first planetary mechanism 100, the second planetary mechanism 110, the third planetary mechanism 120, the first planetary mechanism 100, the second planetary mechanism 110, and the third planetary mechanism. A gear housing 130 that houses the mechanism 120. The first planetary mechanism 100 includes a first sun gear 102, a first carrier 106 that rotatably supports three first planetary gears 104, and a first ring gear 108. The first sun gear 102 is fixed to the motor shaft 31 of the motor 30, the first ring gear 108 is fixed to the gear housing 130, and the gear housing 130 is fixed to the housing 16. The second planetary mechanism 110 includes a second sun gear 112, a second carrier 116 that rotatably supports the three second planetary gears 114, and a second ring gear 118. The second sun gear 112 is fixed to the first carrier 106, and the second ring gear 118 is selectively fixed to one of the housing 16 and the first carrier 106 by the operation member 20. The third planetary mechanism 120 includes a third sun gear 122, a third carrier 126 that rotatably supports the three third pinion gears 134, and a third ring gear 128. The third sun gear 132 is fixed to the second carrier 116, the third ring gear 128 is fixed to the gear housing 130, and the gear housing 130 is fixed to the housing 16. The third carrier 126 is connected to the lock mechanism 34. Thereby, the torque output from the motor 30 is amplified by the speed reduction mechanism 32 and transmitted to the lock mechanism 34. Further, as described above, the speed reduction mechanism 32 is located between the motor 30 and the lock mechanism 34. For this reason, the vibration of the motor transmitted to the lock mechanism 34 is smaller than when the lock mechanism 34 is positioned between the motor 30 and the speed reduction mechanism 32.

  As described above, in the speed reduction mechanism 32, the second ring gear 118 is selectively fixed to one of the housing 16 and the first carrier 106 by the operation member 20. When the second ring gear 118 is fixed to the gear housing 130 and the gear housing 130 is fixed to the housing 16 (see FIG. 8), the first planetary mechanism 100, the second planetary mechanism 110, and the third planetary mechanism. 120 functions, and the speed reduction mechanism 32 outputs high torque (low-speed rotation). On the other hand, when the second ring gear 118 is fixed to the first carrier 106, the second planetary mechanism 110 is invalidated and the speed reduction mechanism 32 outputs a low torque (high speed rotation). Thus, the speed reduction mechanism 32 is an example of a variable ratio transmission, and can switch the speed reduction ratio in accordance with the operation of the operation member 20 by the user. Thereby, the user can switch the torque and the rotational speed of the tool 10 appropriately according to the size (wire diameter) of the wire 300 to be used.

  An exemplary structure of the lock mechanism 34 will be described with reference to FIG. As shown in FIG. 9, the lock mechanism 34 has a bidirectional clutch configuration, and includes an input shaft 150, an output shaft 152, a plurality of lock pins 154, and a clutch case 158. The input shaft 150 is connected to the third carrier 136 of the speed reduction mechanism 32, and the output shaft 152 is connected to the spindle 36. The clutch case 158 is fixed to the gear housing 130, and the gear housing 130 is fixed to the housing 16 (see FIG. 8). The lock mechanism 34 permits torque transmission from the motor 30 to the tool 10, but prohibits torque transmission from the tool 10 to the motor 30. In particular, when the output shaft 152 rotates while the input shaft 150 is stopped, the output shaft 152 is fixed to the clutch case 158 via the plurality of lock pins 154. Thereby, when the motor 30 is stopped, the rotation of the tool 10 with respect to the housing 16 in both directions is prohibited. Further, as described above, the lock mechanism 34 is located between the speed reduction mechanism 32 and the tool 10. For this reason, the vibration of the motor 30 transmitted to the lock mechanism 34 is smaller than when the speed reduction mechanism 32 is located between the lock mechanism 34 and the tool 10.

  In another embodiment, the first ring gear 108, the second ring gear 118, the third ring gear 128, and the clutch case 158 may be directly fixed to the housing 16.

  As shown in FIGS. 2, 3, and 4, the battery attachment portion 15 is located at the rear end of the housing 16, and is provided at a position that intersects the extension line of the rotation axis A of the tool 10. The battery mounting portion 15 is configured so that the battery pack 2 can be attached and detached. The battery mounting portion 15 includes a pair of rails 15a that are slidably engaged with the battery pack 2. The pair of rails 15 a extends in a direction substantially perpendicular to the rotation axis A. The battery pack 2 includes a flat surface 2a. The flat surface 2a is a plane substantially perpendicular to the rotation axis A. For this reason, the binding machine 1 can be stably placed on a work table or the like using the flat surface 2a of the battery pack 2 as a ground plane.

  Next, the electrical configuration of the binding machine 1 will be described with reference to FIG. As shown in FIG. 10, the binding machine 1 further includes a controller 160 and a motor sensor 170. The controller 160 includes a memory 162 and a current sensor 164. The memory 162 can store a program for controlling the operation of the binding machine 1 and various information. Various information includes a first flag, a second flag, and position information of the lever handle 22, which will be described later. The current sensor 164 can detect the current flowing through the motor 30. The motor sensor 170 is disposed in the vicinity of the motor 30 and outputs a pulse signal according to the rotation of the motor 30. The motor 30 is a brushless motor, and the motor sensor 170 is a hall element 33 provided on a sensor substrate fixed to the stator of the brushless motor. To the controller 160, the motor 30, the motor sensor 170, the open sensor 60, the main switch 18, and the battery pack 2 are electrically connected. A pulse signal from the motor sensor 170 is input to the controller 160. The controller 160 can detect the rotational position and rotational speed of the motor 30 based on the pulse signal from the motor sensor 170. Further, the controller 160 can determine whether or not the lever handle 22 is in the open position based on the output signal from the open sensor 60. Further, the controller 160 can detect whether or not the user is turning on the main switch 18 based on the output signal from the main switch 18. When the motor 30 is a commutator motor, the motor sensor 170 may be prepared separately from the commutator motor and provided for the commutator motor.

  Next, processing executed by the controller 160 will be described with reference to FIGS. 11 and 12. As illustrated in FIGS. 11 and 12, the controller 160 mainly executes the first process and the second process based on the program stored in the memory 162. The controller 160 repeatedly executes the following processing every predetermined cycle.

  First, in step S2, the controller 160 determines whether or not the position of the lever handle 22 (that is, the state of the tool 10) has changed. As described above, the controller 160 can detect the position of the lever handle 22 based on the output signal from the opening sensor 60. The controller 160 determines that the position of the lever handle 22 has changed when the position of the lever handle 22 detected in the previous processing cycle is different from the position of the lever handle 22 detected in the current processing cycle. If the position of the lever handle 22 has changed (YES in step S2), the controller 160 proceeds to step S4. On the other hand, if the position of the lever handle 22 has not changed (NO in step S2), the controller 160 proceeds to step S18.

  In step S4, the controller 160 deletes the first flag. A 1st flag is a flag memorize | stored when the rotation position of the tool 10 returns to an initial rotation position by the initial position return process mentioned later. The controller 160 can determine that the tool 10 is in the initial rotation position if the first flag is stored, and can determine that the tool 10 is not in the initial rotation position if the first flag is not stored. .

  In step S6, the controller 160 determines whether or not the lever handle 22 is in the closed position. If the lever handle 22 is in the closed position (YES in step S6), the controller 160 proceeds to step S8. That is, when the user operates the lever handle 22 from the open position to the closed position, the controller 160 proceeds to the process of step S8 through the processes of steps S2, S4, and S6. On the other hand, if the lever handle 22 is not in the closed position (NO in step S6), the controller 160 proceeds to step S14. That is, when the user operates the lever handle 22 from the closed position to the open position, the controller 160 proceeds to the process of step S14 through the processes of steps S2, S4, and S6.

  In step S8, the controller 160 determines whether or not the main switch 18 is turned off. If the main switch 18 is turned off (YES in step S8), the controller 160 proceeds to step S10. On the other hand, if the main switch 18 is not turned off (NO in step S8), the controller 160 proceeds to step S14. That is, only when the lever handle 22 is operated to the closed position while the main switch 18 is turned off, the controller 160 proceeds to the process of step S10.

  In step S10, the controller 160 stores the second flag. The second flag is a flag that permits driving of the motor 30 in the positive direction. As will be described later, the controller 160 drives the motor 30 in the forward rotation direction only when the main switch 18 is turned on with the second flag stored. Next, in step S <b> 12, if the controller 160 is driving the motor 30, the driving of the motor 30 is stopped. Then, the controller 160 returns to step S2.

  On the other hand, in step S14, if the controller 160 stores the second flag, the controller 160 deletes the second flag. Proceeding to step S <b> 16, if the controller 160 is driving the motor 30, it stops the motor 30. Then, the controller 160 returns to step S2. Thus, the controller 160 stores the second flag only when the lever handle 22 is operated to the closed position while the main switch 18 is turned off. That is, driving of the motor 30 is permitted. On the other hand, when the lever handle 22 is in the open position, or when the lever handle 22 is operated to the closed position with the main switch 18 turned on, the second flag is erased and the driving of the motor 30 is prohibited. The

  Returning to step S2, if there is no change in the position of the lever handle 22, the controller 160 proceeds to step S18. In step S18, the controller 160 determines whether or not the lever handle 22 is in the closed position. If the lever handle 22 is in the closed position (YES in step S18), the controller 160 proceeds to step S20. If the lever handle 22 is not in the closed position (NO in step S18), the controller 160 proceeds to step S28 (second process).

  In step S20, the controller 160 determines whether or not the second flag is stored. If the second flag is stored (YES in step S20), the controller 160 proceeds to step S22. If the second flag is not stored (NO in step S20), the controller 160 proceeds to step S26, and if the motor 30 is being driven, the motor 30 is stopped. Then, the controller 160 returns to step S2.

  In step S22, the controller 160 determines whether or not the main switch 18 is turned on. When the main switch 18 is turned on (YES in step S22), the controller 160 proceeds to step S24 and starts a bundling process for driving the motor 30 in the forward rotation direction. As is apparent from the above description, the bundling process is executed only when the lever handle 22 is operated to the closed position and the main switch 18 is subsequently turned on. That is, the controller 160 executes the bundling process when the lever handle 22 is in the closed position or when the lever handle 22 is operated from the open position to the closed position while the main switch 18 is turned on. Is prohibited. The bundling process is continued only while the lever handle 22 is maintained in the closed position and the main switch 18 is turned on. For example, when the main switch 18 is turned off, NO is determined in step S22, and the driving of the motor 30 is stopped in step S26. Alternatively, once the lever handle 22 is moved from the closed position, the drive of the motor 30 is stopped in step S12 or S16 regardless of the lever handle 22 thereafter.

  When the above bundling process is completed and the user operates the lever handle 22 to the open position, the controller 160 proceeds to the second process of step S28 through steps S2 and S18. The second process will be described with reference to FIG. First, in step S32, the controller 160 determines whether or not the first flag is erased. If the first flag has been deleted (YES in step S32), the controller 160 proceeds to step S34. On the other hand, if the first flag is not erased (NO in step S32), the controller 160 proceeds to step S44, and if the motor 30 is being driven, the motor 30 is stopped.

  In step S34, the controller 160 determines whether or not the motor 30 is being driven. If the motor 30 is not driven, the controller 160 proceeds to step S42 and starts an initial position return process for driving the motor 30 in the reverse direction. That is, when the lever handle 22 is operated to the open position after the bundling process is completed, the initial position return process is automatically started. Note that the rotation speed of the motor 30 in the initial position return process is slower than the rotation speed of the motor 30 in the bundling process. The rotation direction of the motor 30 in the initial position return process is opposite to the rotation direction of the motor 30 in the bundling process. On the other hand, if motor 30 has already been driven in the reverse direction (YES in step S34), controller 160 proceeds to step S36.

  In step S36, the controller 160 determines whether or not the rotational speed of the motor 30 is less than a predetermined rotational speed. If the rotation speed of the motor 30 is less than the predetermined rotation speed (YES in step S36), the controller 160 proceeds to step S38. As described above, the binding machine 1 has the stopper mechanism 68, and the stopper mechanism 68 prohibits the tool 10 from rotating in the other direction (reverse direction) beyond the initial rotation position. Since the tool 10 rotates in the reverse direction in the initial position return process, the rotation of the tool 10 (that is, the motor 30) is prohibited by the stopper mechanism 68 when the tool 10 moves to the initial rotation position. As a result, the rotational speed of the motor 30 becomes less than the predetermined rotational speed (YES in step S36), and the controller 160 proceeds to step S38. That is, the controller 160 determines whether or not the tool 10 has moved to the initial rotation position based on the rotation speed of the motor 30. When the rotation of the tool 10 (that is, the motor 30) is prohibited by the stopper mechanism 68, the current of the motor 30 is significantly increased. Therefore, the controller 160 may determine whether or not the tool 10 has moved to the initial rotation position based on the current of the motor 30 instead of the rotation speed of the motor 30. That is, the controller 160 may proceed to step S38 when the current of the motor 30 becomes equal to or greater than a predetermined current in step S36. In step S38, the controller 160 stores the first flag. Next, in step S40, the motor 30 is stopped. On the other hand, when the rotation speed of the motor 30 is not less than the predetermined rotation speed (NO in step S36), the controller 160 proceeds to step S42 and continues to drive the motor 30. That is, the controller 160 continues the initial position return process until the tool 10 returns to the initial rotation position. As described above, when the lever handle 22 is in the closed position, the controller 160 does not execute the second process. That is, the controller 160 prohibits the initial rotational position return process when the lever handle 22 is in the closed position.

  Next, an operation procedure for binding a plurality of 200 by the wire 300 using the binding machine 1 of the present embodiment will be described.

  First, the user pulls out the wire 300 from the wire reel 302 and causes the wire 300 to circulate around the plurality of reinforcing bars 200 (FIG. 13). The wire 300 may be cut in advance with a required length.

  The user then operates the lever handle 22 to the closed position and holds the wire 300 with the tool 10 (FIG. 14). As described above, the tool 10 includes the cutting unit 80 that cuts the wire 300 in addition to the holding unit 78 that holds the wire 300 (see FIGS. 5 and 6). Therefore, when the user operates the lever handle 22 to the closed position, the wire 300 is held by the holding portion 78 and the extra length of the wire 300 is cut by the cutting portion 80. At this stage, the main switch 18 is not yet turned on. When the user operates the lever handle 22 from the open position to the closed position, the controller 160 deletes the first flag (steps S2 and S4). Since the main switch 18 is not turned on, the controller 160 stores the second flag (steps S8 and S10). When the controller 160 stores the second flag, the driving of the motor 30 in the forward rotation direction is permitted.

  Next, the user turns on the main switch 18 with the lever handle 22 maintained in the closed position (FIG. 15). As a result, the controller 160 sequentially executes the processes of steps S2, S18, S20, S22, and S24, and starts a bundling process that drives the motor 30 in the forward rotation direction. The bundling process continues while the lever handle 22 is maintained in the closed position and the main switch 18 is turned on.

  Next, the user turns off the main switch 18 when the binding of the plurality of reinforcing bars 200 by the wire 300 is completed. On the other hand, the lever handle 22 is still maintained in the closed position. The controller 160 sequentially performs the processes of steps S2, S18, S20, S22, and S26, and stops the motor 30. When the motor 30 is stopped, the binding by the wire 300 can be finely adjusted by manually rotating the binding machine 1. This is because the lock mechanism 34 fixes the tool 10 to the housing 16 so as not to rotate. In addition, after the bundling process is completed, the rotational position of the tool 10 is usually out of the initial rotational position.

  Next, the user operates the lever handle 22 to the open position (FIG. 16). As a result, the wire 300 is released from the holding portion 78. The controller 160 executes the processes of steps S2, S4, S6, S14, and S16, and erases the stored second flag. As a result, in the state where the lever handle 22 is in the open position, the driving of the motor 30 in the forward rotation direction is prohibited. Further, the controller 160 sequentially executes the processes of steps S2, S18, S28, S32, S34, and S42, and starts an initial position return process for driving the motor 30 in the reverse rotation direction. During the initial position return process, the controller 160 repeatedly executes the processes of steps S2, S18, S28, S32, S34, S36, and S42. When the tool 10 rotates to the initial rotation position, the lock mechanism 34 prohibits the rotation of the tool 10. Since the rotation speed of the motor 30 becomes less than the predetermined value (YES in step S36), the controller 160 stores the first flag (step S38) and stops the motor 30 (step S40). As a result, the tool 10 returns to the initial rotation position. By returning the tool 10 to the initial rotation position, the convenience of the binding machine 1 by the user is improved.

  As described above, the binding machine 1 of this embodiment includes the tool 10 that holds the wire 300 and the motor 30 that rotates the tool 10. With such a configuration, the user holds the wire 300 circulated around the plurality of reinforcing bars 200 with the tool 10, and rotates the tool 10 with the motor 30 to bind the plurality of reinforcing bars 200 with the wire 300. Can do. In particular, in the tool 10 of the binding machine 1, a cutting unit 80 that cuts the wire 300 is provided in addition to the holding unit 78 that holds the wire 300. Thereby, the tool 10 can cut | disconnect the edge part 300a of the wire 300 which protrudes and extends from the tool 10 simultaneously with hold | maintaining the wire 300 (refer FIG. 5, FIG. 6). For this reason, when the tool 10 holding the wire 300 is rotated, the end portion 300a of the wire 300 can be prevented from being entangled with the binding machine 1.

  The binding machine 1 according to the present embodiment further includes a lock mechanism 34. The lock mechanism 34 prohibits the rotation of the first and second jaws 12 and 14 relative to the housing 16 when the motor 30 is stopped. Accordingly, the user can apply torque to the first and second jaws 12 and 14 holding the wire 300 by rotating the housing 16. Thereby, the binding force by the wire 300 can be manually adjusted by rotating the housing 16 without driving the motor 30. Here, the lock mechanism 34 may include a one-way clutch that connects the first and second jaws 12 and 14 to the housing 16 instead of the bidirectional clutch. Even in such a configuration, the user can apply torque to the first and second jaws 12 and 14 holding the wire 300 by rotating the housing 16 in one direction.

  The binding machine 1 of the present embodiment includes a return mechanism that rotates and stops the first and second jaws 12 and 14 to the initial rotation position. The return mechanism in this embodiment is mainly configured by a controller 160 that rotates the tool 10 in the reverse rotation direction and a stopper mechanism 68 that prohibits the tool 10 from rotating in the reverse rotation direction beyond the initial rotation position. Yes. According to such a configuration, before the user holds the wire 300 by the first and second jaws 12 and 14, the first and second jaws 12 and 14 are returned to the initial rotation position by the return mechanism. Can do. The initial rotation position is not particularly limited, but may be a position where the user can easily hold the wire 300 by the first and second jaws 12 and 14. Since the first and second jaws 12 and 14 are positioned at the initial rotation position, the user can easily hold the wire 300 by the first and second jaws 12 and 14. As a result, the burden on the user who uses the binding machine 1 can be reduced.

  Specific examples of the present invention have been described in detail above, but these are merely examples and do not limit the scope of the claims. The technology described in the claims includes various modifications and changes of the specific examples illustrated above.

  In some embodiments, the operation of the motor 30 may be controlled with a configuration different from that of the present embodiment. For example, the controller 160 may control the operation of the motor 30 according to the operation of the lever handle 22. Specifically, the controller 160 can drive the motor 30 when the lever handle 22 is in the closed position. Thus, the user only has to operate the lever handle 22 when binding the plurality of reinforcing bars 200 with the wires 300. That is, the user does not need to operate both the lever handle 22 and the main switch 18 separate from the lever handle 22. According to such a configuration, the main switch 18 is not necessarily required. In this case, the binding machine 1 may further include a closing sensor that detects whether or not the lever handle 22 is in the closing position in addition to the opening sensor 60 described above. For example, the closing sensor is provided with a magnet (hereinafter referred to as a second magnet) in the lever handle 22 and a hall element (hereinafter referred to as a second Hall element) in the housing 16 so that the lever handle 22 moves to the closed position. In this case, the second magnet of the lever handle 22 may be close to the second Hall element so that the output signal of the second Hall element changes.

  The operation of the binding machine in which the motor 30 operates according to the operation of the lever handle 22 will be described. When the user operates the lever handle 22 to the closed position, the wire 300 is held by the holding unit 78 and the extra length of the wire 300 is cut by the cutting unit 80. As the lever handle 22 moves to the closed position, the output signal of the closure sensor (second Hall element) changes. In response to the change in the output signal of the closing sensor, the controller 160 drives the motor 30 (specifically, the bundling process is started). Thereafter, when the user operates the lever handle 22 to the open position, the open sensor 60 detects that the lever handle 22 has moved to the open position. In response to the output signal from the opening sensor 60, the controller 160 first stops driving the motor 30. Further, when the user operates the lever handle 22 to the open position, the wire 300 is released from the holding portion 78. The controller 160 further executes the above-described initial position return process. That is, the controller 160 drives the motor 30 in the reverse direction to return the tool 10 to the initial rotation position. As described above, the controller 160 is configured to execute the bundling process when the lever handle 22 is operated to the closed position, and to execute the initial position return process when the lever handle 22 is operated to the open position. Can do. The closing sensor (and the opening sensor 60) is not limited to the hall element, and various sensors or switches can be employed. That is, it is only necessary that the motor 30 is driven when the lever handle 22 is operated to the closed position. In the control of the motor 30 based on the operation of the lever handle 22 described above, the motor 30 may be driven and stopped based on the output signal of only one of the opening sensor 60 or the closing sensor. In this case, the binding machine 1 only needs to include one of the opening sensor 60 and the closing sensor.

  The technical elements described in this specification or the drawings exhibit technical usefulness alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. In addition, the technology exemplified in this specification or the drawings can achieve a plurality of objects at the same time, and has technical usefulness by achieving one of the objects.

1: Binding machine 2: Battery pack 2a: Flat surface 10: Tool 12: First jaw 14: Second jaw 15: Battery mounting portion 16: Housing 16c: Grip 18: Main switch 20: Shift switch 22: Lever handle 30: Motor 32: Deceleration mechanism 34: Lock mechanism 36: Spindle 40: Connection mechanism 48a: Stopper surface 52: Linear motion member 60: Closing sensor 68: Stopper mechanism 70: First holding surface 72: First cut surface 74 : Second holding surface 76: second cutting surface 78: holding unit 80: cutting unit 82: stopper member 150: input shaft 152 of locking mechanism: output shaft 154 of locking mechanism: locking pin 158 of locking mechanism: locking mechanism Clutch case 160: controller 162: memory 164: current sensor 170: motor sensor 200: rebar 300: wire 30 a: wire end 302: wire reel A: the motor rotation shaft

Claims (9)

A binding machine for binding a plurality of objects with wires,
With the first Joe,
A second jaw that is movable relative to the first jaw and can hold the wire between the first jaw;
A housing that rotatably supports the first and second jaws;
A handle supported relative to the housing and connected to at least one of the first and second jaws;
A motor that is provided in the housing and rotates the first and second jaws;
And a lock mechanism that prohibits rotation of the first and second jaws in at least one direction relative to the housing.   The locking mechanism prohibits rotation of the first and second jaws relative to the housing when the motor is stopped, and the first and second relative to the housing when the motor is operating. The binding machine according to claim 1, which allows rotation of two jaws.   The binding machine according to claim 1 or 2, wherein the lock mechanism includes a bidirectional clutch provided on a transmission path for transmitting torque from the motor to the first and second jaws.   The bidirectional clutch has an input shaft connected to the motor, an output shaft connected to the first and second jaws, and a clutch case fixed to the housing, and together with the input shaft, the The output shaft according to claim 3, wherein the output shaft is allowed to rotate with respect to the clutch case, and the output shaft is locked with respect to the clutch case when the output shaft rotates with respect to the input shaft. Binding machine.   The binding machine according to claim 1, wherein the lock mechanism includes a one-way clutch that connects the first and second jaws to the housing.   The binding machine according to any one of claims 1 to 5, further comprising a variable ratio transmission provided on a transmission path for transmitting torque from the motor to the first and second jaws.   The binding machine according to claim 6, wherein the lock mechanism is located between the variable ratio transmission and the first and second jaws on the transmission path. A binding machine for binding a plurality of objects with wires,
A tool capable of holding the wire;
A housing for rotatably supporting the tool;
A motor that is provided in the housing and rotates the tool;
A binding mechanism that prohibits rotation of the tool with respect to the housing in at least one direction. A reduction mechanism provided on a transmission path for transmitting torque from the motor to the tool;
The binding machine according to claim 8, wherein the speed reduction mechanism is located between the motor and the lock mechanism on the transmission path.

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