JP6634883B2 - Driving machine - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a driving machine that strikes a stopper with a striking tool portion and drives the stopper into a material to be driven.

  2. Description of the Related Art Conventionally, a driving machine that hits a fastener with a hitting tool portion and drives the fastener into a material to be driven is known, and the driving machine is described in Patent Literature 1. The driving machine described in Patent Literature 1 includes a plunger movably provided in a housing, a blade serving as a hitting tool provided in the plunger, a spring for pressing the plunger, and a bumper provided in the housing. A motor provided in the housing, a drum rotating by the rotational force of the motor, a wire connecting the drum and the plunger, an injection unit provided in the housing, and a magazine provided over the housing and the injection unit. Have. The magazine accommodates nails as fasteners and supplies the nails to the ejection section.

  The driving machine has a handle continuously provided on the housing, and a battery detachable from the handle. A trigger is provided on the handle and a control is provided within the housing. An acceleration sensor is provided in the control unit. Further, the driving machine has a trigger switch for detecting a trigger pull-in operation, and an amplifier for amplifying an output of the acceleration sensor. The acceleration sensor detects the impact due to the nail driving and the acceleration due to the recoil, and the signal output from the amplifier is input to the control unit.

  In the initial state of the driving machine, the plunger is located at the bottom dead center. When the operator presses the injection unit against the material to be driven and operates the trigger, electric power is supplied from the battery to the motor, and the motor rotates. When the rotational force of the motor is transmitted to the drum, the wire is wound around the drum, and the plunger rises. The spring is compressed by the rise of the plunger. When the plunger reaches the top dead center, the torque of the motor is not transmitted to the drum, and the plunger moves toward the bottom dead center by the force of the compressed spring. The nail supplied from the magazine to the nose portion is hit with a blade and driven into the material to be driven. Also, the plunger collides with the bumper, and the bumper absorbs the impact.

  The acceleration sensor detects an acceleration acting in a direction opposite to the moving direction of the blade due to a reaction force when the nail is driven, and the control unit detects the driving of the nail based on a signal output from the amplifier.

JP 2010-82765 A

  However, the driving machine described in Patent Literature 1 was unable to detect clogging of a stopper at an injection section.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a driving machine capable of detecting clogging of a stopper at an injection section.

The driving machine according to one embodiment has an injection unit to which a stopper is supplied, a striking tool unit that linearly operates and strikes the stopper to strike the material to be driven, and strikes the stopper. A buffer member that receives the operating load of the impact tool portion due to collision of the impact tool portion, wherein the driving load detected by the buffer member is detected, and the detected operating load is A detection unit that outputs a signal of a corresponding voltage, and when the voltage of the signal output from the detection unit is equal to or more than a first threshold value, it is determined that the stopper is not clogged, and is output from the detection unit. A controller that determines that the stopper is clogged when the voltage of the signal is less than the first threshold .

  The detecting unit of the driving machine detects whether or not the stopper is clogged in the injection unit based on the operation load received by the shock absorbing member when the hitting tool unit operates and hits the stopper.

It is a side sectional view showing the whole driving machine. It is a side sectional view showing an important section of a driving machine. It is a front sectional view of a driving machine. It is a front sectional view of a driving machine. It is a block diagram which shows the control system of a driving machine.

  An embodiment of a driving machine according to the present invention will be described with reference to the drawings.

  A driving machine 10 shown in FIG. 1 includes a driver blade 12 for hitting a nail 11 as a fastener, a pressure chamber 13 for applying a hitting force to the driver blade 12, a pressure accumulating vessel 14 forming the pressure chamber 13, and a pressure accumulating vessel. A cylinder case 15 accommodating the piston 14 and a piston 16 fixed to the driver blade 12 are provided. The cylinder case 15 has a cylindrical body 15A, and a wall 15B that is continuous with the first end of the body 15A. The second end of the body 15A is open.

  The driving machine 10 has a cylinder 17 and a tail cover 18. The cylinder 17 is provided in the cylinder case 15 and operatively supports the piston 16. The tail cover 18 is fixed to the trunk 15A. As shown in FIG. 2, the cylinder 17 and the tail cover 18 are arranged adjacent to each other in the direction of the center line A1, and the tail cover 18 is fixed to the second end of the body 15A. Further, an electric motor 19 is provided outside the cylinder case 15, and a winding mechanism 20 that transmits the power of the electric motor 19 to the driver blade 12 is provided. A handle 21 that is continuous with the body 15A of the cylinder case 15 is provided. The cylinder case 15 and the handle 21 constitute a housing 80.

  In the handle 21, an attachment portion 22 is provided at an end opposite to the trunk portion 15A. A battery 23 that is detachable from the mounting portion 22 is provided, and the battery 23 supplies power to the electric motor 19. Further, a magazine 24 for accommodating the nail 11 is provided, and the magazine 24 is attached to the tail cover 18.

  The cylinder case 15 is made of metal or synthetic resin. A pressure storage container 14 and a cylinder 17 are provided in a cylinder case 15. The accumulator 14 and the cylinder 17 are made of metal. The pressure accumulator 14 has a hollow main body 25 and a boss 26 fixed to the main body 25, and the pressure chamber 13 is formed in the main body 25. The boss 26 is annular. The cylinder 17 has a cylindrical body portion 27 and a fixing portion 28 provided at a first end in the direction of the center line A1 of the cylinder 17. A second end located opposite to the fixing portion 28 in the direction of the center line A1 is disposed in the boss portion 26, and the pressure chamber 13 and the inside of the cylinder 17 are connected.

  2, 3, and 4, the holder 29 is interposed between the tail cover 18 and the body 15A of the cylinder case 15. The holder 29 is made of metal or synthetic resin, and has a holding hole 30. The tail cover 18 has a base portion 31 and a nose portion 32 continuous from the base portion 31 along the center line A1 direction. The tail cover 18 is fixed to the holder 29 by a screw member 33, and the holder 29 is fixed to the cylinder case 15. The fixing part 28 is disposed in the holding hole 30, and the fixing part 28 is positioned and fixed in a direction along the center line A <b> 1 by being sandwiched between the tail cover 18 and the holder 29.

  The piston 16 and the driver blade 12 are movable within the cylinder 17 in the direction of the center line A1. The center line A1 is common to the piston 16, the cylinder 17, and the driver blade 12. The cylinder 17 is a guide member that linearly regulates the operation direction of the piston 16 and the driver blade 12. A seal member 34 is attached to the outer peripheral surface of the piston 16, and the seal member 34 contacts the inner peripheral surface of the cylinder 17 to form a seal surface. Compressed air is sealed in the pressure chamber 13, and the seal member 34 keeps the pressure chamber 13 airtight.

  The piston 16 receives the air pressure of the pressure chamber 13 and is urged to approach the tail cover 18. An air chamber 13 </ b> A in the cylinder 17 and connected to the pressure chamber 13 forms a part of the pressure chamber 13. The air chamber 13A is also called an upper piston chamber. The driver blade 12 is an element that strikes the nail 11 and has a shaft shape. The driver blade 12 is made of metal. The piston 16 and the driver blade 12 constitute a striking tool part 70.

  The battery 23 has a storage case 35 and a plurality of battery cells stored in the storage case 35. The battery cell is a secondary battery that can be charged and discharged, and any of a lithium ion battery, a nickel hydride battery, a lithium ion polymer battery, and a nickel cadmium battery can be used as the battery cell. Battery 23 is a DC power supply.

  The electric motor 19 is provided in a motor case 36, and the motor case 36 is fixed to the tail cover 18. The electric motor 19 includes a stator 37 that does not rotate with respect to the motor case 36, and a rotor 38 that can rotate within the motor case 36. The stator 37 is formed by winding a conductor around a stator core. The electric motor 19 is a brushless motor. The rotor 38 includes an output shaft 39 and a rotor core 40 fixed to the output shaft 39. The output shaft 39 is supported by two bearings 41, and the rotor 38 is rotatable around the axis A2. A permanent magnet is attached to the rotor core 40.

  Further, a speed reducer 42 is provided in the motor case 36. The speed reducer 42 is arranged in a power transmission path between the electric motor 19 and the driver blade 12. The speed reducer 42 includes a plurality of sets of planetary gear mechanisms. Electric power is supplied to the electric motor 19, and the output shaft 39 rotates. The torque of the output shaft 39 is transmitted to the speed reducer 42.

  The hoist mechanism 20 converts the rotational force of the speed reducer 42 into the reciprocating operation force of the driver blade 12. The winding mechanism 20 includes a drive shaft 46 arranged coaxially with the speed reducer 42, a disk 49 fixed to the drive shaft 46, a pin 50 provided on the disk 49, and a rack 51 provided on the driver blade 12. , Is provided.

  1 and 2, the axis A2 of the drive shaft 46 intersects the center line A1 at right angles. 3 and 4, the axis A2 does not intersect the center line A1. The axis A2 is arranged between the base 31 and the tip 32A of the nose 32 in the direction of the center line A1. The disk 49 can rotate integrally with the drive shaft 46, and a plurality of pins 50 are arranged at intervals in the rotation direction of the disk 49.

  The rack 51 has a configuration in which convex portions and concave portions are alternately arranged in the longitudinal direction of the driver blade 12. The pin 50 switches between a state in which the pin 50 meshes with the rack 51 and a state in which the pin 50 is separated from the rack 51 as the disk 49 rotates. When the drive shaft 46 rotates counterclockwise in FIGS. 3 and 4 and the pin 50 meshes with the rack 51, the rotational force of the drive shaft 46 is transmitted to the driver blade 12, and the driver blade 12 and the piston 16 operates in the direction of the center line A1 in a direction approaching the accumulator 14. When all the pins 50 are separated from the rack 51, the rotational force of the drive shaft 46 is not transmitted to the driver blade 12, and the piston 16 and the driver blade 12 are urged in the direction of the center line A1 by the air pressure of the pressure chamber 13. You.

  A bumper 52 is provided between the fixed part 28 of the cylinder 17 and the base part 31. A concave portion 53 is provided in the base portion 31, and the bumper 52 is disposed from the concave portion 53 to the inside of the fixing portion 28. A part of the bumper 52 is disposed in the fixed part 28. The bumper 52 is a buffer member that absorbs the kinetic energy of the piston 16 by elastically deforming under the operation load of the piston 16. The bumper 52 is integrally formed of a rubber-like elastic body, for example, an elastomer. In particular, a thermosetting elastomer having excellent heat resistance is preferable. Also, the bumper 52 has a role as a stopper that regulates the range of movement in the direction of the center line A1 when the piston 16 operates in a direction approaching the tail cover 18.

  A guide hole 54 penetrating the bumper 52 in the direction of the center line A1 is formed. The driver blade 12 can reciprocate in the direction of the center line A1 through the guide hole 54. The outer shape of the bumper 52 is circular in a plan view perpendicular to the center line A1. Further, as shown in FIGS. 3 and 4, the outer peripheral surface of the bumper 52 is provided with a taper whose diameter increases as it approaches the nose portion 32 in a direction along the center line A1. Further, the inner peripheral surface of the fixing portion 28 is provided with a taper whose diameter increases as it approaches the nose portion 32 in a direction along the center line A1.

  The tail cover 18 is made of metal or synthetic resin, and has an injection path 55 in the nose portion 32. The emission path 55 is arranged in a direction parallel to the center line A <b> 1, and the emission path 55 is connected to the guide hole 54. The driver blade 12 is movable in the direction of the center line A1 in the injection path 55.

  A guide plate 71 is provided in the injection path 55. The guide plate 71 is made of metal. The guide plate 71 guides the operation of the driver blade 12 and guides the movement of the nail 11 hit in the injection path 55.

  The nails 11 held by the magazine 24 are supplied to the ejection path 55 one by one. As shown in FIGS. 1 and 2, a push lever 56 is attached to the nose portion 32. The push lever 56 is movable within a predetermined range with respect to the tail cover 18 in a direction along the center line A1.

  A contact 58 is fixed to the push lever 56, and a stopper 59 is provided on the nose 32. The push lever 56 is pushed in the direction along the center line A1 by the force of the compression spring 57, and the contact 58 contacts the stopper 59 and stops. Specifically, the push lever 56 is pushed away from the base 31 by the force of the compression spring 57. When the push lever 56 is pressed against the material W1 to be driven, the push lever 56 moves toward the base portion 31 against the force of the compression spring 57 and stops. A push lever switch 74 shown in FIG. 5 is provided on the tail cover 18. The push lever switch 74 is turned on when the push lever 56 is pressed against the driven material W1, and is turned off when the push lever 56 is separated from the driven material W1.

  A trigger 73 is provided on the handle 21. The trigger 73 is attached to the handle 21 so as to be able to reciprocate linearly. A trigger switch 61 is provided in the handle 21. The trigger switch 61 is turned on when an operation force is applied to the trigger 73, and turned off when the operation force of the trigger 73 is released.

  A board 62 is provided in the mounting section 22, and a microcomputer 63 and an inverter circuit 64 are provided on the board 62. The microcomputer 63 has an input / output interface, an arithmetic processing unit, and a storage unit. The inverter circuit 64 is connected to the stator 37 of the electric motor 19 and the battery cells. The inverter circuit 64 includes a plurality of switching elements, and the microcomputer 63 switches on and off of the plurality of switching elements. The inverter circuit 64 controls electric power supplied from the battery 23 to the electric motor 19.

  Further, a position detection sensor 65 is provided in the tail cover 18. The position detection sensor 65 outputs a signal based on the position of the disk 49 in the rotation direction. The microcomputer 63 processes the signal output from the position detection sensor 65 to detect the position of the disk 49 in the rotation direction. The microcomputer 63 estimates the positions of the piston 16 and the driver blade 12 in the direction of the center line A1 based on the position of the disk 49 in the rotation direction.

  Further, a concave portion 66 is provided in the base portion 31, and the piezoelectric element 67 is accommodated in the concave portion 66. The piezoelectric element 67 is arranged in contact with the end face of the bumper 52 closest to the nose portion 32 in the direction of the center line A1. The piezoelectric element 67 converts the pressure applied to the bumper 52 in the direction of the center line A1 into a voltage and outputs a signal. The piezoelectric element 67 may have either a pad shape or a sheet shape. More specifically, the piezoelectric element 67 receives a load when the piston 16 collides with the bumper 52, and outputs a signal corresponding to the magnitude of the load. The piezoelectric element 67 has such a characteristic that the larger the load, the higher the signal voltage.

  The driving machine 10 has a reset switch 81 and a notification device 82 shown in FIG. The reset switch 81 may be provided solely on the handle 21 or the cylinder case 15, or may be provided on the operation display unit together with other switches. The operation display unit is not shown, and the operation display unit includes a liquid crystal display. The reset switch 81 is operated by an operator. The notification device 82 is provided on the handle 21 or the cylinder case 15. The notification device 82 includes an LED lamp, an electric lamp, and a speaker. The LED lamp and the electric light blink to notify the worker of the situation. The speaker generates an alarm sound to notify the operator of the situation.

  The microcomputer 63 processes the signal of the trigger switch 61, the signal of the push lever switch 74, the signal of the position detection sensor 65, the signal of the piezoelectric element 67, and the signal of the reset switch 81, and controls the inverter circuit 64. A cover 68 is provided between the piezoelectric element 67 and the bumper 52 in the direction of the center line A1 in the recess 66. The material of the cover 68 is, for example, a rubber-like elastic body, the cover 68 is in a sheet shape, and the cover 68 covers the piezoelectric element 67.

  Next, a usage example of the driving machine 10 will be described. When the operation force of the trigger 73 is released and the trigger switch 61 is turned off, the microcomputer 63 turns off all the switching elements of the inverter circuit 64. Therefore, the electric power of the battery 23 is not supplied to the electric motor 19, and the electric motor 19 is stopped. When the electric motor 19 is stopped, the piston 16 is stopped at an initial position away from the bumper 52.

  When the microcomputer 63 detects that the push lever 56 is pressed against the workpiece W1 and that the trigger switch 61 is turned on, the microcomputer 63 repeats the control for turning on and off the switching element of the inverter circuit 64. The power of the battery 23 is supplied to the electric motor 19. Then, the rotor 38 of the electric motor 19 stops after rotating by a predetermined angle in one direction. The torque of the electric motor 19 is transmitted to the drive shaft 46 via the speed reducer 42. The drive shaft 46 and the disk 49 rotate counterclockwise in FIG. When the disk 49 rotates, the driver blade 12 operates by the engaging force between the pin 50 and the rack 51. That is, the piston 16 and the driver blade 12 move toward the top dead center, and the air pressure in the pressure chamber 13 increases.

  When all the pins 50 are released from the rack 51 after the piston 16 reaches the top dead center as shown in FIGS. 1 and 3, the piston 16 descends toward the bottom dead center by the air pressure of the pressure chamber 13. . For this reason, the driver blade 12 hits the nail 11 in the injection path 55, and the nail 11 is driven into the driven material W1.

  After the nail 11 is driven into the driven material W1, the piston 16 collides with the bumper 52 as shown in FIG. The bumper 52 is elastically deformed by receiving a compressive load in the direction of the center line A1, and the bumper 52 absorbs the kinetic energy of the piston 16 and the driver blade 12. Further, the electric motor 19 continues to rotate even after the driver blade 12 hits the nail 11. Then, the pin 50 meshes with the rack 51, and the driver blade 12 and the piston 16 move from the bottom dead center toward the top dead center. When the piston 16 reaches the initial position, the microcomputer 63 stops the electric motor 19.

  After driving the nail 11 into the driven material W1, the operator releases the push lever 56 from the driven material W1 with the trigger switch 61 turned on. When the operator presses the push lever 56 against the driven material W1 again, the electric motor 19 rotates a predetermined angle in one direction, drives the nail 11 into the driven material W1, and the electric motor 19 stops. Thereafter, when the operator repeats the above operation, the nail 11 can be sequentially driven into the workpiece W1.

  When the driver blade 12 hits the nail 11 and the whole nail 11 comes out of the injection path 55, the piston 16 collides with the bumper 52, and the bumper 52 receives a compressive load and is elastically deformed. However, if the nail 11 is jammed in the injection path 55 after the driver blade 12 hits the nail 11, the piston 16 does not collide with the bumper 52, and the bumper 52 does not receive a compressive load. The clogging of the nail 11 is a state in which the entire nail 11 is not driven into the driven material W1, and the nail 11 buckles and remains in the injection path 55.

  The microcomputer 63 determines whether or not the nail 11 is clogged in the ejection path 55 based on the voltage of the signal output from the piezoelectric element 67. A threshold value is stored in the storage unit of the microcomputer 63 to determine whether or not the nail 11 is clogged.

  After hitting the nail 11 with the driver blade 12, the microcomputer 63 determines that the nail 11 is not jammed in the injection path 55 if the voltage of the signal output from the piezoelectric element 67 is equal to or higher than the first threshold. After determining that the nail 11 is not clogged in the injection path 55, the microcomputer 63 performs the first control when the trigger switch 61 is turned on again and the push lever switch 74 is turned on. The first control is a control in which the electric motor 19 is rotated to hit the nail 11.

  After hitting the nail 11 with the driver blade 12, the microcomputer 63 determines that the nail 11 is jammed in the injection path 55 if the voltage of the signal output from the piezoelectric element 67 is less than the first threshold. Note that the microcomputer 63 may be configured to determine that the nail 11 is clogged in the ejection path 55 when the voltage of the signal output from the piezoelectric element 67 is lower than the second threshold which is lower than the first threshold. .

  When the microcomputer 63 determines that the nail 11 is jammed in the injection path 55, it performs the second control. The second control is to stop the electric motor 19 even when the push lever 56 is pressed against the driven material W1 after the nail 11 is hit and the trigger switch 61 is turned on. When the microcomputer 63 performs the second control, the electric motor 19 is stopped at the position where the pin 50 is engaged with the rack 51. Therefore, the driver blade 12 does not move in the direction of the center line A1 due to the force of the pressure chamber 13. That is, when the nail 11 is jammed, the next striking operation is not performed. After the operator removes the nail clogged in the injection path 55, when the push lever 56 is pressed against the workpiece W1 and the trigger switch 61 is turned on, the electric motor 19 rotates the nail of the rotor and nail 11. The driving operation can be resumed.

  Further, after the operator removes the nail stuck in the injection path 55, the operator operates the reset switch 81. Then, after the reset switch 81 is operated, when the push lever 56 is pressed against the material W1 to be driven and the trigger switch 61 is turned on, the electric motor 19 rotates and the driving operation of the nail 11 can be restarted. . That is, the operation of the reset switch 81 is a precondition for canceling the second control.

  The piezoelectric element 67 can be disposed between the outer peripheral surface of the bumper 52 and the inner peripheral surface of the concave portion 53, or can be disposed between the outer peripheral surface of the bumper 52 and the inner peripheral surface of the fixing portion 28. It is. In this case, the bumper 52 receives a load in the direction of the center line A1 and is elastically deformed in the radial direction, and the piezoelectric element 67 receives a pressure and outputs a signal. That is, the piezoelectric element 67 may be disposed at a location where the collision load of the piston 16 is indirectly transmitted via the bumper 52. For this reason, the piezoelectric element 67 can be embedded in the bumper 52.

  Further, the microcomputer 63 can also detect the presence or absence of air leakage in the pressure chamber 13 based on the signal of the piezoelectric element 67. In this case, a third threshold for detecting the presence or absence of air leakage is stored in the storage unit of the microcomputer 63 in advance. The third threshold is smaller than the first threshold and higher than the second threshold. When the signal of the piezoelectric element 67 is equal to or larger than the third threshold value, the microcomputer 63 determines that there is no air leak in the pressure chamber 13. When the signal of the piezoelectric element 67 is less than the third threshold value, the microcomputer 63 determines that there is an air leak in the pressure chamber 13.

  Note that the third threshold value used for detecting the presence or absence of air leakage is higher than the second threshold value. This is because, even if there is an air leak in the pressure chamber 13, if the nail 11 is hit with the driver blade 12, the piston 16 collides with the bumper 52 unless the nail 11 is clogged in the injection path 55.

  Further, since the cover 68 is provided between the bumper 52 and the piezoelectric element 67, damage to the piezoelectric element 67 can be prevented. Further, a display unit can be provided on the handle 21 or the cylinder case 15. The operation display unit includes a lamp and a liquid crystal display. Then, when the microcomputer 63 detects the clogging of the nail 11 or when the microcomputer 63 detects the air leak of the pressure chamber 13, the situation can be displayed on the operation display unit.

  Further, the microcomputer 63 may determine that the pressure in the pressure chamber 13 is higher than usual when the signal of the piezoelectric element 67 is a voltage equal to or higher than the fourth threshold value. The voltage corresponding to the fourth threshold can be, for example, 1.5 times or more the voltage corresponding to the first threshold. The state in which the pressure in the pressure chamber 13 is higher than normal is, for example, a state in which the gas in the pressure chamber 13 is warmed because the outside air temperature is high. When the microcomputer 63 determines that the pressure in the pressure chamber 13 is higher than usual, the microcomputer 63 can notify the condition with the notifying device 82 and stop the electric motor 19.

  To explain the meaning of the items described in the embodiment, the nail 11 corresponds to a stopper, the bumper 52 corresponds to a cushioning member, the tail cover 18 corresponds to an injection unit, and the microcomputer 63 and the piezoelectric element 67 The electric motor 19 corresponds to a motor, the microcomputer 63 and the inverter circuit 64 correspond to a control unit, the pressure chamber 13 and the air chamber 13A correspond to an urging unit, and the trigger 73 corresponds to a detection unit. It corresponds to an operation member. Note that the detection unit may be an acceleration sensor provided in the control unit. The top dead center corresponds to a position where the impact tool portion starts shifting in the stopper direction.

  The driving machine is not limited to the above embodiment, but can be variously modified without departing from the gist thereof. For example, it is possible to connect the bellows and the piston and form a pressure chamber in the bellows. Further, the striking force applying mechanism for applying a striking force to the striking tool portion may be either a structure that operates the striking tool portion by air pressure or a structure that operates the striking tool portion by the force of an elastic member. The elastic member may be either a synthetic rubber or a metal compression spring. That is, it includes a structure in which the elastic force of a metal spring is applied to the striking tool to strike the stopper. When a bellows is used or when a metal spring is used, a rail may be used as a guide member for guiding the operation of the impact tool unit instead of the cylinder.

  Further, the biasing unit for operating the impact tool unit by air pressure includes a structure for connecting an air hose to a driving machine in addition to a pressure chamber formed in the housing. The urging unit can be grasped as a striking force applying mechanism. Then, the air is compressed by the compressor, the compressed air is supplied into the housing via the air hose, and the striking tool can be operated toward the buffer member.

  The control unit may be a single electric component or an electronic component, or may be a unit having a plurality of electric components or a plurality of electronic components. Electrical or electronic components include processors, control circuits, and modules.

Motors that move the striking mechanism away from the bumper include an electric motor, an engine, a hydraulic motor, and a pneumatic motor. The electric motor may be either a brushed motor or a brushless motor. The power supply of the electric motor may be either a DC power supply or an AC power supply.
When an AC power supply is used as the power supply, the driving machine and an AC power supply outlet are connected by a power cable. Stoppers driven into the material to be driven by the driving machine include U-shaped stops in addition to shaft-shaped nails. The nail includes a nail having a head and a nail without a head.

  The power transmission mechanism that transmits the power of the motor to the impact tool includes a pulling mechanism in addition to the hoisting mechanism. The pulling mechanism includes a rotating body that rotates with the rotating force of the motor, a clutch that connects and disconnects a power transmission path between the motor and the rotating body, and a cable that connects the rotating body and the piston. When the clutch mechanism is connected, the rotating body rotates by the rotational force of the motor to wind up the cable, and the pulling mechanism operates in a direction in which the striking tool is pulled away from the bumper. When the clutch mechanism is disengaged, the striking tool moves toward the buffer member with the force of the striking force imparting mechanism, and the striking tool strikes the stop.

  Instead of providing the pins 50 on the disk 49, a gear may be provided on the outer peripheral surface of the disk 49 within a predetermined angle range, and the gear may be engaged with the rack 51. The operation member includes a trigger operable linearly with respect to the handle, and a lever operable within a predetermined angle range around the support shaft with respect to the housing.

  DESCRIPTION OF SYMBOLS 10 ... Driving machine, 11 ... Nail, 12 ... Driver blade, 13 ... Pressure chamber, 13A ... Air chamber, 15 ... Cylinder case, 16 ... Piston, 17 ... Cylinder, 18 ... Tail cover, 19 ... Electric motor, 20 ... Winding mechanism, 21 Handle, 56 Push lever, 61 Trigger switch, 63 Microcomputer, 64 Inverter circuit, 65 Position detection sensor, 67 Piezoelectric element, 70 Impact tool, 73 Trigger, 74 Push lever switch, 80: housing, A1: center line, W1: driven member.

Claims (9)

An injection unit to which a stopper is supplied, a striking tool unit that strikes the stopper by operating in a straight line and drives the struck member, and the striking tool unit that strikes the stopper collides with the striking tool unit. And a shock-absorbing member for receiving an operating load of the impact tool portion,
A detection unit that detects the operation load received by the buffer member , and outputs a voltage signal according to the detected operation load,
When the voltage of the signal output from the detection unit is equal to or higher than a first threshold, it is determined that the stopper is not clogged, and when the voltage of the signal output from the detection unit is lower than the first threshold. A control unit that determines that there is clogging of the stopper,
A driving machine. A motor for operating the impact tool part in a direction away from the buffer member;
After the impact tool unit is operated by the motor, an urging unit configured to operate the impact tool unit so as to strike the stopper and strike the driven member.
The driving machine according to claim 1, further comprising: Wherein the control unit includes a determines that clogging of the fastener there Ru stops the motor, the driving machine of claim 2 wherein. A housing provided with the motor and the biasing portion;
A push lever pressed against the driven member and movable with respect to the housing;
A trigger provided on the housing and operated by an operator;
Has ,
The control unit includes:
When it is determined that the stopper is not clogged, the push lever is pressed against the material to be driven, and when the trigger is operated, by rotating the motor, the impact tool part is First control for operating in a direction away from the buffer member ;
If it is determined that the clogging of the fastener is present, the push lever is pressed against the nailed object, and, when the trigger is operated, and a second control Ru stops the motor,
The driving machine according to claim 3, which performs the following. A reset switch operated by the operator is provided,
The second control restarts the rotation of the motor when the reset switch is operated after the motor is stopped, the push lever is pressed against the material to be driven, and the trigger is operated. Item 4. A driving machine according to Item 4. A cylinder provided in the housing and supporting the impact tool portion so as to be capable of operating linearly;
The striking tool section,
A piston operable in the direction of the center line of the cylinder ,
A driver blade attached to the piston,
Has,
The driving machine according to claim 4, wherein the driver blade hits the stopper when the piston moves in a direction approaching the cushioning member. Before Symbol injection unit and the cylinder are arranged along the center line direction,
The cushioning member is disposed between the cylinder and the injection unit in the center line direction,
The driving machine according to claim 6, wherein a guide hole in which the driver blade is operably disposed is provided in the buffer member.   The driving machine according to claim 6, wherein the detection unit includes a piezoelectric element disposed between the buffer member and the emission unit. The driving machine according to any one of claims 1 to 8, wherein, when the control unit determines that the stopper is clogged, the notifying device reports that the stopper is clogged .

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