JP2018034258A - Driving tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a driving tool capable of reducing the load that is applied to each protrusion of a driver blade.SOLUTION: The driving tool includes: a cylinder 15 for movably supporting a driver blade 21; and a pressure chamber for moving the driver blade 21 from a top dead center toward a bottom dead center to impact a nail 28. There are also provided a pin wheel 40 and a rack 42 that hold the driver blade 21 at a standby position between the top dead center and the bottom dead center, moving the driver blade 21 from the standby position to the top dead center. The pin wheel 40 has multiple pins 49, 50, and the rack 42 has multiple protrusions 51, 52. When the driver blade 21 moves from the top dead center to the bottom dead center, the multiple pins 49, 50 are located outside an area E1 through which the multiple protrusions 51, 52 pass. When the driver blade 21 is held at the standby position, the multiple pins 49, 50 are located inside the area E1.SELECTED DRAWING: Figure 5

Description

  The present disclosure relates to a driving machine that moves a striker and strikes a stopper with the striker.

  2. Description of the Related Art Conventionally, a driving machine that moves a striker and strikes a stopper with the striker is known. The driving machine described in Patent Document 1 includes a cylinder provided in a housing, a piston movably accommodated in the cylinder, a driver blade attached to the piston, and a plurality of second blades provided in the driver blade. 1 engagement portion and a pressure chamber formed in the housing. The piston and the driver blade constitute a striker.

  Further, the driving machine includes a motor housing portion continuous with the housing, a motor provided in the motor housing portion, a nose portion attached to the housing, a rotating member rotatably provided in the nose portion, and a rotation direction of the rotating member A plurality of second engaging portions, a bumper provided between the cylinder and the nose portion, and a clutch mechanism provided between the motor and the rotating member. Further, the driving machine includes a handle portion continuous to the housing, a trigger provided on the handle portion, a connection portion connected to the handle portion, a control portion provided on the connection portion, and a battery attached to the connection portion. Have.

  In the driving machine described in Patent Document 1, when the tip of the nose portion is separated from the material to be driven and no operating force is applied to the trigger, the control unit stops the motor. When the motor is stopped, the piston is pressed against the bumper by the pressure in the pressure chamber, and the striker is stopped. In other words, the striker stops at the bottom dead center.

  When the tip of the nose portion is pressed against the workpiece and an operating force is applied to the trigger, the control unit rotates the motor, and the rotational force of the motor is transmitted to the rotating member by the clutch mechanism. The plurality of first engaging portions and the plurality of second engaging portions are always meshed, and the rotational force of the rotating member is transmitted to the driver blade, so that the striker moves from the bottom dead center toward the top dead center. . When the striker reaches top dead center, the clutch mechanism is released and the rotational force of the motor is not transmitted to the rotating member. For this reason, the striker moves toward the bottom dead center by the pressure in the pressure chamber, and the driver blade strikes the stopper. While the striker moves from the top dead center toward the bottom dead center, the plurality of first engaging portions and the plurality of second engaging portions are always meshed with each other.

Japanese Patent Laid-Open No. 2006-68221

  However, in the driving machine described in Patent Document 1, the first engagement portion and the second engagement portion are engaged with each other in any position between the top dead center and the bottom dead center. Therefore, there is a problem that the first engaging portion is always subjected to a load.

  An object of the driving machine of the present disclosure is to provide a driving machine capable of reducing the load received by the first engaging portion of the driving tool.

  The driving machine according to an embodiment includes a first guide member that supports the striker so as to be able to reciprocate, a first moving mechanism that moves the striker from a first position to a second position and strikes a stopper. A holding mechanism that holds the striker in a standby position between the first position and the second position, and moves the striker from the standby position to the first position. A second moving mechanism and a plurality of first engaging portions provided on the striker and projecting across the moving direction of the striker, the second moving mechanism having an axis A rotating member that is rotatable as a center, and a plurality of second engagements that are arranged along the rotation direction of the rotating member and that can be engaged and released independently from each of the plurality of first engaging portions. And when the striking piece moves from the first position to the second position, the plurality of striking elements All of the two engaging portions are located outside the region through which the plurality of first engaging portions pass, and at least 2 of the plurality of second engaging portions when the striker is held at the standby position. One is located in the region.

  In the driving machine according to one embodiment, when the striker moves from the first position to the second position, the plurality of first engaging portions pass through the region, and all of the plurality of second engaging portions are in the region. Located outside. Therefore, the load received by the first engagement portion can be reduced.

It is a partial side sectional view of a driving machine which is one embodiment of the present invention. It is a partial side sectional view of a driving machine which is one embodiment. It is front sectional drawing of the driving machine shown in FIG. It is front sectional drawing of the driving machine shown in FIG. It is an expanded sectional view which shows the principal part of FIG. It is an expanded sectional view which shows the principal part of FIG. It is front sectional drawing which shows the nose part of a driving machine. FIG. 8 is a bottom cross-sectional view taken along line AA in FIG. 7. It is a block diagram which shows the control system of a driving machine.

  A driving machine according to an embodiment will be described with reference to the drawings.

  A driving machine 10 shown in FIGS. 1 to 4 includes a cylindrical cylinder housing 11, a handle 12 continuous to the cylinder housing 11, a nose portion 13 fixed to the cylinder housing 11, and a motor housing attached to the nose portion 13. 14 and. The cylinder 15, the annular holder 16 and the pressure accumulating container 17 are provided inside the cylinder housing 11, and the piston 18 is disposed in the cylinder 15 so as to be reciprocally movable.

  A pressure chamber 19 is formed across the pressure accumulation container 17 and the cylinder 15. A seal member 20 is attached to the outer peripheral surface of the piston 18, and the seal member 20 contacts the inner peripheral surface of the cylinder 15 to form a seal surface. The seal member 20 seals the pressure chamber 19. The gas is compressed and sealed in the pressure chamber 19. The gas sealed in the pressure chamber 19 may be sealed with an inert gas such as nitrogen gas or a rare gas in addition to air. In this embodiment, an example in which air is sealed in a pressure chamber will be described.

  The piston 18 is movable in the direction of the center line A1 of the cylinder 15. The piston 18 is biased in the direction of the center line A1 under the pressure of the pressure chamber 19. A driver blade 21 is provided on the piston 18. The driver blade 21 is integral with the piston 18, and the driver blade 21 and the piston 18 constitute a striker 22. Both the driver blade 21 and the piston 18 are made of metal.

  As shown in FIG. 1, the electric motor 23 is provided in the motor housing 14. A power transmission mechanism 24 is provided in the nose portion 13. The power transmission mechanism 24 transmits the power of the electric motor 23 to the driver blade 21. A trigger 25 is provided on the handle 12, and a trigger switch 26 is provided in the handle 12. The trigger switch 26 is turned on when an operating force is applied to the trigger 25, and is turned off when the operating force applied to the trigger 25 is released.

  Further, as shown in FIG. 2, a mounting portion 79 that connects the handle 12 and the motor housing 14 is provided. The battery 27 can be attached to and detached from the mounting portion 79. The battery 27 supplies power to the electric motor 23. The battery 27 has a housing and a plurality of battery cells housed in the housing. The battery cell is a secondary battery that can be charged and discharged, and an arbitrary battery such as a lithium ion battery, a nickel hydrogen battery, a lithium ion polymer battery, or a nickel cadmium battery can be used as the battery cell. The battery 27 is a direct current power source.

  A magazine 29 for accommodating the nail 28 is provided, and the magazine 29 is attached to the nose portion 13. The nails 28 accommodated in the magazine 29 are arranged in series. The magazine 29 has a feed mechanism that supplies the nail 28 to the nose portion 13.

  As shown in FIGS. 1, 3, and 4, a bumper 30 is provided between the cylinder 15 and the nose portion 13. A concave portion 31 is provided in the nose portion 13, and the bumper 30 is disposed in the concave portion 31. The bumper 30 is integrally formed of a rubber-like elastic body, for example, an elastomer. The bumper 30 is a buffer member that absorbs the kinetic energy of the piston 18 by elastically deforming upon receiving the moving load of the piston 18. A guide hole 32 penetrating the bumper 30 in the direction of the center line A1 is formed. The driver blade 21 can move in the direction of the center line A1 within the guide hole 32.

  As shown in FIGS. 3 and 4, the holder 33 is provided between the cylinder housing 11 and the nose portion 13. The nose portion 13 is fixed to the holder 33 by a screw member 34, and the nose portion 13 is fixed to the cylinder housing 11 via the holder 33.

  The motor housing 14 is fixed to the nose portion 13. The electric motor 23 includes a stator 35 that does not rotate with respect to the motor housing 14 and a rotor 36 that can rotate within the motor housing 14. The stator 35 is obtained by winding a conductive wire around a stator core. The rotor 36 has a permanent magnet. The electric motor 23 is a brushless motor. The rotor 36 is fixed to an output shaft 78, and the output shaft 78 is supported by two bearings 37. The output shaft 78 is rotatable about the axis A2.

  A reduction gear 38 is provided in the motor housing 14. The speed reducer 38 is disposed in a power transmission path between the electric motor 23 and the driver blade 21. The speed reducer 38 includes a plurality of planetary gear mechanisms and a drive shaft 39. When electric power is supplied to the electric motor 23 and the output shaft 78 rotates, the rotational force of the output shaft 78 is transmitted to the speed reducer 38. The speed reducer 38 makes the rotational speed of the drive shaft 39 slower than the rotational speed of the output shaft 78.

  The power transmission mechanism 24 converts the rotational force of the drive shaft 39 into the reciprocating movement force of the driver blade 21. The power transmission mechanism 24 includes a pin wheel 40 fixed to the drive shaft 39, a pinion mechanism 41 provided on the pin wheel 40, and a rack 42 provided on the driver blade 21. The drive shaft 39 and the pin wheel 40 are rotatable about the axis A2.

  The pinion mechanism 41 has a plurality of, specifically, eight pins 43 to 50. The pins 43 to 50 are made of metal. As shown in FIG. 5, the eight pins are arranged at equal intervals in the rotation direction of the pin wheel 40. Eight pins 43-50 are arrange | positioned in the range of about 270 degree | times on the same periphery centering on axis A2. The range in which the eight pins 43 to 50 are arranged in the rotation direction of the pin wheel 40 is the first portion B1. The range in which the eight pins 43 to 50 are not arranged in the rotation direction of the pin wheel 40 is the second portion B2. The range of the second part B2 is about 90 degrees. The angle corresponding to the first part B1 around the axis A2 is larger than the angle corresponding to the second part B2. In the rotational direction of the pin wheel 40, the pins 43 and 50 are located at both ends in the first part B1, and in the rotational direction of the pin wheel 40, the second part B2 is located between the pin 43 and the pin 50.

  The pin wheel 40 in the present embodiment rotates counterclockwise in FIGS. The outer diameter of the pin 50 located at the rearmost part in the rotation direction of the pin wheel 40 is larger than the outer diameters of the pins 43 to 49. The outer diameters of the pins 43 to 49 are all the same.

  As shown in FIGS. 3 and 4, the rack 42 has a plurality of, specifically, eight convex portions 51 to 58 formed on the edge 60 of the driver blade 21. The eight convex portions 51 to 58 are arranged at intervals in the longitudinal direction of the driver blade 21, that is, in the direction of the center line A1. The eight convex portions 51 to 58 protrude from the edge 60 of the driver blade 21 in a direction intersecting the center line A1.

  Of the eight convex portions 51 to 58, the protrusion amount L1 of the convex portion 51 arranged at the position closest to the tip 21A of the driver blade 21 is larger than the protrusion amount L2 of the convex portions 52 to 58. The protruding amounts L2 of the convex portions 52 to 58 are all the same. Among the eight convex portions 51 to 58, the width L3 of the convex portion 51 is larger than the width L4 of each of the other convex portions 52 to 58. The widths L3 and L4 are lengths in the direction of the center line A1. The widths L4 of the convex portions 52 to 58 are all the same. The eight convex portions 51 to 58 can be individually engaged with and released from the eight pins 43 to 50, respectively. The pin with which a single convex part is engaged and released is uniquely determined.

  As the pinwheel 40 rotates, the pinion mechanism 41 switches between a state engaged with the rack 42 and a state released from the rack 42. When the pinwheel 40 rotates counterclockwise in FIGS. 3 to 6 and the pinion mechanism 41 engages with the rack 42, the rotational force of the pinwheel 40 is transmitted to the driver blade 21, and the driver blade 21 and the piston 18 moves in a direction approaching the pressure accumulating container 17. When the pinion mechanism 41 is released from the rack 42, the rotational force of the pin wheel 40 is not transmitted to the driver blade 21, and the piston 18 and the driver blade 21 move away from the pressure accumulating container 17 by the pressure of the pressure chamber 19. .

  In FIGS. 1, 3, and 4, the movement of the driver blade 21 and the piston 18 in a direction approaching the pressure accumulating container 17 is referred to as “raising”. The movement of the piston 18 and the driver blade 21 away from the pressure accumulating vessel 17 is referred to as “down”.

  A rotation control mechanism 81 is provided in the motor housing 14. The rotation control mechanism 81 is disposed in a power transmission path between the speed reducer 38 and the pin wheel 40. The rotation control mechanism 81 transmits the rotational force of the drive shaft 39 to the pin wheel 40 regardless of the rotation direction of the drive shaft 39. The rotation control mechanism 81 prevents the drive shaft 39 from rotating when the urging force of the driver blade 21 is transmitted to the pin wheel 40.

  When the driving machine 10 is viewed from the side as shown in FIG. 1, the axis A2 of the drive shaft 39 is arranged so as to intersect the center line A1 at a right angle. When the driving machine 10 is viewed from the front as shown in FIGS. 3 and 4, the axis A2 is disposed so as not to intersect the center line A1.

  As shown in FIG. 7, the nose portion 13 includes a base portion 62 fixed to the holder 33 via a screw member 34, and a guide plate 64 fixed to the base portion 62 via a screw member 80. The guide plate 64 is made of metal, and an injection path 66 is formed between the base portion 62 and the guide plate 64. The injection path 66 is formed along the direction of the center line A1, and the injection path 66 is connected to the guide hole 32.

  The guide plate 64 has a rail 67 shown in FIG. 8, and the rail 67 protrudes from the surface of the guide plate 64 toward the injection path 66. The rail 67 is provided in the direction of the center line A1 in FIG. The driver blade 21 has a groove 68 shown in FIG. The groove 68 is provided in the direction of the center line A1 in FIG. The rail 67 is disposed in the groove 68. The driver blade 21 is movable in the direction of the center line A1 in the injection path 66. The guide plate 64 serves to move the driver blade 21 in the direction of the center line A1. The base portion 62 and the guide plate 64 prevent the driver blade 21 from moving in the protruding direction of the convex portions 51 to 58, and the driver blade 21 intersects the protruding direction of the convex portions 51 to 58. Prevents moving in the direction.

  As shown in FIG. 1, a push lever 69 is attached to the nose portion 13. A guide hole 70 is provided in the push lever 69 in the direction of the center line A1. A stopper 71 is provided in the nose portion 13, and the stopper 71 is disposed in the guide hole 70. The push lever 69 is movable in the direction of the center line A1 within a range where the inner wall of the guide hole 70 and the stopper 71 are in contact with each other.

  The push lever 69 is urged in the direction of the center line A1 by the force of the elastic member, and the stopper 71 comes into contact with the inner wall of the guide hole 70 and stops. Specifically, the push lever 69 is biased in a direction away from the bumper 30 by the force of the elastic member. The elastic member includes a metal coil spring. When the push lever 69 is pressed against the workpiece W1, the push lever 69 moves in a direction approaching the bumper 30 against the force of the elastic member and stops.

  A push lever switch 72 shown in FIG. 9 is provided in the nose portion 13 of FIG. The push lever switch 72 is turned on when the push lever 69 is pressed against the driven material W1, and turned off when the push lever 69 is separated from the driven material W1.

  As shown in FIG. 2, the control unit 73 is provided in the mounting unit 79, and the control unit 73 includes the microcomputer 74 and the inverter circuit 75 shown in FIG. The microcomputer 74 has an input / output interface, an arithmetic processing unit, and a storage unit. The inverter circuit 75 is connected to the stator 35 of the electric motor 23 and the battery cell of the battery 27. The inverter circuit 75 includes a plurality of semiconductor elements. The plurality of semiconductor elements can be turned on and off independently.

  A position detection sensor 76 shown in FIG. 9 is provided in the nose portion 13 of FIG. The position detection sensor 76 outputs a signal based on the position of the pin wheel 40 in the rotational direction. A phase detection sensor 77 is provided in the motor housing 14. The phase detection sensor 77 detects the phase in the rotation direction of the output shaft 78 of the electric motor 23. The microcomputer 74 processes the signal of the trigger switch 26, the signal of the push lever switch 72, the signal of the position detection sensor 76, and the signal of the phase detection sensor 77 to control the inverter circuit 75. The microcomputer 74 processes the signal from the position detection sensor 76 to estimate whether the piston 18 is in the standby position.

  Next, a usage example of the driving machine 10 will be described. The controller 73 turns off all the switching elements of the inverter circuit 75 when at least one of the trigger switch 26 and the push lever switch 72 is turned off. For this reason, the electric power of the battery 27 is not supplied to the electric motor 23, and the electric motor 23 is stopped.

  Further, as shown in FIG. 5, the pin 50 is engaged with the convex portion 51, and the other pins 43 to 49 are released from the convex portions 52 to 58. Further, a part of the pins 49 and 50 are located in a region E1 corresponding to the protrusion amount L2 of the convex portions 52 to 58 with respect to the edge 60. The region E1 is a range or space in a direction intersecting the center line A1.

  The piston 18 and the driver blade 21 are biased in the downward direction by the pressure in the pressure chamber 19, and the force received by the driver blade 21 is transmitted to the pin 50 via the convex portion 51. For this reason, the pin wheel 40 receives clockwise rotational force in FIGS. 3 and 5. The rotation control mechanism 81 prevents the drive shaft 39 from rotating clockwise while the force of the driver blade 21 is transmitted to the pin wheel 40. Therefore, the piston 18 is stopped at the standby position shown in FIG.

  When the piston 18 is stopped at the standby position, the tip 21A of the driver blade 21 is positioned below the head 28A of the nail 28. That is, the tip 21A of the driver blade 21 is located between the tip 13A and the head 28A in the direction of the center line A1.

  When the trigger switch 26 is turned on and the push lever switch 72 is turned on, the control unit 73 repeats control for turning on and off the switching element of the inverter circuit 75 and supplies the electric power of the battery 27 to the electric motor 23. To do. Then, the output shaft 78 of the electric motor 23 rotates in one direction. The rotational force of the output shaft 78 is transmitted to the drive shaft 39 via the speed reducer 38. The drive shaft 39 and the pin wheel 40 rotate counterclockwise in FIGS. When the pin wheel 40 rotates, the piston 18 moves toward the top dead center, and the air pressure in the pressure chamber 19 increases.

  After the piston 18 reaches the top dead center, when the pins 50 are released from the convex portions 51, all the pins are released from all the convex portions. That is, all the pins 43 to 50 are located outside the region E1. For this reason, the piston 18 is lowered toward the bottom dead center by the air pressure in the pressure chamber 19, the driver blade 21 strikes the nail 28 in the injection path 66, and the nail 28 is driven into the driven material W1. When the piston 18 moves from the top dead center toward the bottom dead center, the convex portions 51 to 58 pass through the region E1.

  Further, after the nail 28 is driven into the driven material W1, the piston 18 collides with the bumper 30 as shown in FIG. The position of the piston 18 that has collided with the bumper 30 is the bottom dead center. The bumper 30 is elastically deformed by receiving a compressive load in the direction of the center line A1, and the bumper 30 absorbs the kinetic energy of the piston 18 and the driver blade 21.

  Further, the electric motor 23 is rotated even after the driver blade 21 hits the nail 28. Then, the pin 43 meshes with the convex portion 58, and the piston 18 moves from the bottom dead center toward the top dead center. As the pin wheel 40 rotates counterclockwise in FIG. 4, the pin 44 engages with the convex portion 57 and is released, and the pin 45 engages with the convex portion 56 and is released. Further, the pin 46 is engaged with the convex portion 55 and released, and the pin 47 is engaged with the convex portion 54 and released. Further, the pin 48 is engaged and released by the convex portion 53, and the pin 49 is engaged and released by the convex portion 52. Further, the pin 50 is engaged with the convex portion 51 and released. And the control part 73 will stop the electric motor 23, if the piston 18 arrives at the stand-by position shown in FIG.

  When the piston 18 stops at the standby position as shown in FIG. 3, the driving machine 10 applies the force of the driver blade 21 urged by the pressure of the pressure chamber 19 via the convex portion 51 and the pin 50 as shown in FIG. 5. Is transmitted to the pin wheel 40. The convex portions 52 to 58 are released from the pins, respectively. For this reason, the amount of wear of the convex portion 51 is larger than the amount of wear of each of the convex portions 52 to 58, and the convex portion 51 has an inclined surface 51A inclined with respect to the center line A1, as shown in FIG. It is formed.

  However, when the piston 18 is stopped at the standby position, some of the pins 49 and 50 are located in the region E1. For this reason, in addition to the pin 50 engaging with the convex part 51, the pin 49 engages with the convex part 52. Therefore, the load received by the convex portions 51 and 52 can be reduced, and the deterioration of the durability of the driver blade 21 can be suppressed.

  Further, the width L3 of the convex portion 51 is larger than the width L4 of each of the other convex portions 52 to 58. Therefore, the strength of the convex portion 51 in the center line A1 direction is higher than the strength of each of the other convex portions 52 to 58. Therefore, deformation of the convex portion 51 can be suppressed.

  Further, when the inclined surface 51A is formed, a component force F1 in a direction intersecting the center line A1 is generated at a contact portion between the inclined surface 51A and the pin 50. For this reason, the driver blade 21 is pushed away from the pinwheel 40. When the pin 50 is released from the convex portion 51, the driver blade 21 tries to return in a direction approaching the pin wheel 40.

  In the driver blade 21, the width L3 of the convex portion 51 is larger than the respective width L4 of the convex portions 52 to 58, and the protrusion amount L1 of the convex portion 51 is larger than the respective protrusion amounts L2 of the convex portions 52 to 58. large. For this reason, when the pin 50 is released from the convex portion 51, the pins 43 to 49 are all located outside the region E1. Therefore, it is possible to prevent the convex portion 52 from colliding with the pin 50 when the driver blade 21 is lowered.

  Further, when the convex portion 51 is worn, the convex portion 51 engages with the pin 50, and the convex portion 52 engages with the pin 49 and the piston 18 stops at the standby position, so that the component force F1 is reduced. it can. Accordingly, when the convex portion 51 is released from the pin 50 and the convex portion 52 is released from the pin 49 and the piston 18 is lowered, the sliding resistance between the driver blade 21 and the guide plate 64 can be suppressed.

  In the driving machine 10 of the embodiment, the top dead center and the bottom dead center are grasped as the position of the piston 18 in the direction of the center line A1. The top dead center and the bottom dead center can also be grasped as the position of the driver blade 21. Further, the top dead center and the bottom dead center can be grasped as the position of the striker 22.

  Explaining the meaning of the matters described in the driving machine 10 of the embodiment, the top dead center as the position where the piston 18 is closest to the pressure chamber 19 is the first position of the striker 22. The position of the striker 22 at the time when the piston 18 collides with the bumper 30, that is, the bottom dead center is the second position. The pressure chamber 19 is a first moving mechanism, and the pin wheel 40, the pinion mechanism 41, the rack 42, and the rotation control mechanism 81 are holding mechanisms. The convex portions 51 to 58 are a plurality of first engaging portions, the pin wheel 40 is a rotating member, the pins 43 to 50 are a plurality of second engaging portions, and the power transmission mechanism 24 is a second moving mechanism. It is. The cylinder 15 is a first guide member, and the nose portion 13 is a second guide member. The cylinder housing 11 is a housing, and the electric motor 23 is a motor.

  The driving machine is not limited to the above embodiment, and various changes can be made without departing from the scope of the driving machine. For example, the first moving mechanism that moves the housing striker can use a structure that moves the striker with the force of an elastic member, instead of the structure that moves the striker with air pressure. The elastic member may be either synthetic rubber or a metal coil spring. When using a metal coil spring or the like, the first guide member that restricts the movement of the striker can use a rail instead of the cylinder.

  A 1st guide member is an element which suppresses that a striker moves to the direction which cross | intersects with respect to a centerline. The control unit may be an electric component or a single electronic component, or may be a unit having a plurality of electrical components or a plurality of electronic components. The electrical component or electronic component includes a processor, a control circuit, and a module.

  The motor that moves the striker from the second position to the first position includes an electric actuator, an electromagnetic actuator, an engine, a hydraulic motor, and a pneumatic motor. The electric motor may be either a brush motor or a brushless motor. The power source of the electric motor may be either a DC power source or an AC power source. The stopper driven into the workpiece by the driving element includes a U-shaped stopper in addition to the shaft-shaped nail. The nail includes a nail having a head and a nail having no head. Further, a gear can be used as the second engaging portion provided on the rotating member, and the gear can be engaged with and released from the first engaging portion.

  DESCRIPTION OF SYMBOLS 10 ... Driving machine, 11 ... Cylinder housing, 13 ... Nose part, 15 ... Cylinder, 18 ... Piston, 19 ... Pressure chamber, 21 ... Driver blade, 22 ... Impactor, 23 ... Electric motor, 24 ... Power transmission mechanism, 28 ... nail, 40 ... pin wheel, 41 ... pinion mechanism, 42 ... rack, 43-50 ... pin, 51-58 ... convex, 60 ... edge, 66 ... injection path, A1 ... center line, A2 ... axis, B1 ... 1st site | part, B2 ... 2nd site | part, E1 ... area | region, L1, L2 ... Projection amount, L3, L4 ... Width.

Claims (7)

A driving machine comprising: a first guide member that supports the striker so as to be reciprocally movable; and a first moving mechanism that moves the striker from a first position to a second position to strike a stopper.
A holding mechanism for holding the striker at a standby position between the first position and the second position;
A second moving mechanism for moving the striker from the standby position to the first position;
A plurality of first engaging portions provided on the striker and projecting across the movement direction of the striker;
Have
The second moving mechanism includes:
A rotating member rotatable about an axis;
A plurality of second engaging portions arranged along a rotation direction of the rotating member and capable of being individually engaged and released with respect to the plurality of first engaging portions;
Have
When the striker moves from the first position to the second position, all of the plurality of second engaging portions are located outside the region through which the plurality of first engaging portions pass,
When the striker is held at the standby position, at least two of the plurality of second engaging portions are located in the region. The striker is
A piston movable in the direction of the center line of the first guide member;
A driver blade that moves in the direction of the centerline with the piston;
Have
2. The driving machine according to claim 1, wherein the plurality of first engaging portions protrude from an edge of the driver blade in a direction intersecting with the center line. The rotating member is
A first portion where the plurality of second engaging portions are arranged in a rotation direction about the axis;
A second portion in which the second engaging portion is not arranged in a rotation direction about the axis;
The driving machine according to claim 2, comprising:   Of the plurality of first engaging portions, the protruding amount of the first engaging portion arranged at the position closest to the tip of the driver blade is larger than the protruding amounts of the other first engaging portions. The driving machine according to claim 2 or 3.   Of the plurality of first engaging portions, the width in the center line direction of the first engaging portion disposed at a position closest to the tip of the driver blade is the center of the other first engaging portion. The driving machine according to any one of claims 2 to 4, wherein the driving machine is larger than a width in a line direction. A housing in which the first guide member and the first moving mechanism are provided;
A second guide member attached to the housing and movably supporting the driver blade;
An injection path formed in the second guide member and supplied with the stopper;
Is provided,
The driving machine according to claim 2, wherein the driver blade hits the stopper supplied to the injection path. The first moving mechanism has a motor that rotates the rotating member;
The driving device according to any one of claims 1 to 6, wherein the second moving mechanism includes a pressure chamber that moves the striker with a gas pressure.

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