Punch machine

Abstract

The present invention provides a driving machine capable of reducing the amount of gas injected into a pressure chamber. The driving machine (10) comprises: an impact piece (12) that moves from a first position to a second position to impact a fastener (58); a pressure chamber (13) filled with gas that moves the impact piece (12) from the first position to the second position; a control mechanism that moves the impact piece (12) from the second position to the first position; and a gas injection unit that injects gas into the pressure chamber (13), wherein the impact piece (12) has a standby position between the second position and the first position, and before injecting gas into the pressure chamber (13), the control mechanism allows the impact piece (12) to stop at an adjustment position closer to the second position than the standby position.

Description

[0001] The present invention is a divisional application of the invention application with application number 201780046260.4, invention name “punch-in machine” and application date June 30, 2017. Technical Field

[0002] The present invention relates to a driving machine which utilizes the pressure of gas in a pressure chamber to move an impact piece and utilizes the impact piece to impact a fastener. Background Art

[0003] At present, a driving machine is known, which seals air or an inert gas as a gas in a closed pressure chamber, presses a piston using the pressure of the gas, and moves the impact piece. The driving machine is described in Patent Document 1. The driving machine comprises: a cylinder provided in a housing; a piston movably accommodated in the cylinder; a driving blade fixed to the piston; a pressure chamber formed in the cylinder; and a charging valve as a gas pressure regulating mechanism provided in the housing. Compressed gas is filled into the pressure chamber from a nitrogen bottle provided outside the housing via an air pipe and a charging valve. There is a sealing component between the cylinder and the piston, and the sealing component maintains the airtightness of the pressure chamber.

[0004] The piston and the driving blade are impact members. In addition, the driver includes: a motor provided in a housing; a gear train that transmits rotational force from the motor; and a cam that rotates when the rotational force is transmitted from the gear train. The cam has a protrusion that engages with and disengages from the piston.

[0005] In the driving machine described in Patent Document 1, the rotational force of the motor is transmitted to the cam via a gear train. When the protrusion engages with the piston, the piston moves from the bottom dead center to the top dead center using the power of the cam. When the piston moves from the bottom dead center to the top dead center, the pressure in the pressure chamber rises. When the piston reaches the top dead center, the protrusion disengages from the piston, and the power of the cam is no longer transmitted to the piston. As a result, an impact force corresponding to the pressure in the pressure chamber is applied to the drive blade, which drives the nail into the object.

[0006] Prior art literature

[0007] Patent Literature

[0008] Patent Document 1: Japanese Patent No. 5849920 Summary of the invention

[0009] Problems to be solved by the invention

[0010] In a driving machine that uses such compressed gas as an elastic body to drive fasteners, when the pressure in the pressure chamber decreases, it is necessary to replenish the pressure chamber with air, inert gas, or other gas until the predetermined pressure is reached. In this case, the pressure of the gas depends on the volume of the enclosed space, so in order to specify the predetermined pressure, it is necessary to specify the volume of the enclosed space. In addition, when replenishing the gas to the pressure chamber, if the gas can be replenished at a lower pressure, a simple replenishment mechanism can be used even without a large device such as a compressor. As replenishment mechanisms, there are small simple compressors, simple electric pumps, and manual compression pumps.

[0011] An object of the present invention is to provide a driving machine capable of easily replenishing a pressure chamber with a gas having a predetermined pressure.

[0012] Solutions to Solve Problems

[0013] A driving machine in one embodiment comprises: an impact piece that moves from a first position toward a second position to impact a fastener; a pressure chamber filled with gas that causes the impact piece to move from the first position toward the second position; a control mechanism that causes the impact piece to move from the second position toward the first position; and a gas injection portion that injects the gas into the pressure chamber, wherein the impact piece has a standby position between the second position and the first position, and before injecting the gas into the pressure chamber, the control mechanism allows the impact piece to stop at an adjustment position that is closer to the second position than the standby position.

[0014] Effects of the Invention

[0015] The driver according to one embodiment can easily replenish the pressure chamber with gas at a predetermined pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional view of the driver according to one embodiment of the present invention as seen from the side.

[0017] Figure 2 It is a cross-sectional view of a driver according to an embodiment when viewed from the side.

[0018] Figure 3 It is a positive observation Figure 1 A cross-sectional view of the driver is shown.

[0019] Figure 4 It is a positive observation Figure 1 A cross-sectional view of the driver is shown.

[0020] Figure 5 This is a block diagram showing a control system of a driver.

[0021] Fig. 6A This is a diagram showing an example of a phase detection sensor provided in a driver.

[0022] Figure 6B This is a diagram showing an example of a phase detection sensor provided in a driver.

[0023] Figure 7 : is a line graph showing the voltage of the signal output by the phase detection sensor.

[0024] Figure 8 This is a flowchart showing a control example 1 of the driver.

[0025] Fig. 9 This is a flowchart showing a control example 2 of the driver.

[0026] Fig. 10A It is a diagram showing another example of the phase detection sensor.

[0027] Fig. 10B It is a diagram showing another example of the phase detection sensor.

[0028] Fig.11 Yes means Fig. 10A , Fig. 10B A line graph of the voltage of the signal output by the phase detection sensor.

[0029] Fig. 12A It is a diagram showing another example of the phase detection sensor.

[0030] Fig. 12B It is a diagram showing another example of the phase detection sensor.

[0031] Fig.13 Yes means Fig. 12A , Fig. 12B A line graph of the voltage of the signal output by the phase detection sensor.

[0032] Fig.14A It is a diagram showing another example of the phase detection sensor.

[0033] Fig. 14B It is a diagram showing another example of the phase detection sensor.

[0034] Fig.15 Yes means Fig.14A , Fig. 14B A line graph of the voltage of the signal output by the phase detection sensor.

[0035] Fig.16 This is a flowchart showing a control example 3 of the driver.

[0036] Fig.17 It is a cross-sectional view of a driver according to another embodiment when viewed from the side.

[0037] Fig.18It is a cross-sectional view of a driver according to another embodiment when viewed from the side.

[0038] Fig.19 yes Fig.17 Cross-sectional view of the I-I line of the punching machine.

[0039] Fig. 20 yes Fig.17 Cross-sectional view of the I-I line of the punching machine.

[0040] Fig.21 It means that it is located at Fig.17 A sectional view showing the operation of a power conversion mechanism of a driver.

[0041] Fig. 22 It means that it is located at Fig.17 A sectional view showing the operation of a power conversion mechanism of a driver. DETAILED DESCRIPTION

[0042] A driver according to an embodiment will be described with reference to the drawings.

[0043] Figure 1 , Figure 2 as well as Figure 3 The driver 10 is shown. The driver 10 includes: a cylindrical housing 11; an impact piece 12 arranged from the inside to the outside of the housing 11; a pressure chamber 13 that moves the impact piece 12 in a first direction B1 from the top dead center to the bottom dead center; a power conversion mechanism 14 that moves the impact piece 12 in a second direction B2 opposite to the first direction; and an electric motor 15 that transmits rotational force to the power conversion mechanism 14.

[0044] The housing 11 includes a main body 16, a cover 17 covering an opening of the main body 16, a handle 18 and a motor housing 19 continuous with the main body 16, and a connection 20 connecting the handle 18 and the motor housing 19. A pressure storage container 21 and a cylinder 22 are provided in the housing 11, and an annular connection member 23 connects the pressure storage container 21 and the cylinder 22. The pressure chamber 13 is formed in the pressure storage container 21. The valve 80 is provided in the connection member 23. The valve 80 includes a passage connected to the pressure chamber 13 and a valve core for opening and closing the passage. The valve 80 is provided in the main body 16.

[0045] The driver 10 is connected to the gas compressor 81 and the pressure regulator 94 which are separately provided from the driver 10 through the air hose 82. The gas compressor 81 and the pressure regulator 94 are not included in the structure of the driver 10. The pressure regulator 94 of the present embodiment is preferably a pressure reducing valve. The adapter 83 is mounted on the air hose 82. When the cover 17 is removed from the main body 16, the air hose 82 can be inserted into the main body 16. The adapter 83 can be connected to and removed from the valve 80. When the adapter 83 is connected to the valve 80, the valve 80 opens the passage. When the adapter 83 is removed from the valve 80, the valve 80 closes the passage.

[0046] The impact member 12 includes a piston 24 movably disposed in the cylinder 22 and a driving blade 25 fixed to the piston 24. The piston 24 is movable in the direction of the center line A1 of the cylinder 22. The center line A1 direction is parallel to the first direction B1 and the second direction B2. A sealing member 79 is mounted on the outer periphery of the piston 24, and the sealing member 79 contacts the inner surface of the cylinder 22 to form a sealing surface. The sealing member 79 hermetically seals the pressure chamber 13.

[0047] Compressed gas is sealed in the pressure chamber 13. The gas sealed in the pressure chamber 13 may be an inert gas such as nitrogen or a rare gas, in addition to air. In the present embodiment, an example in which dry air is sealed in the pressure chamber 13 is described.

[0048] The drive blade 25 is preferably made of metal, and a portion of the drive blade 25 may be coated with resin or the like, or different types of metals may be joined. Figure 3 As shown in FIG. 1 , a rack 26 is provided along the longitudinal direction of the driving blade 25. The rack 26 has a plurality of convex portions 26A. The plurality of convex portions 26A are arranged at regular intervals in the direction of the center line A1.

[0049] A retainer 28 is arranged from the inside to the outside of the main body 16. The retainer 28 is made of aluminum alloy or synthetic resin. The retainer 28 has a cylindrical load-bearing portion 29, an arc-shaped cover 30 continuous with the load-bearing portion 29, and a tail portion 31 continuous with the load-bearing portion 29. Figure 1 As shown, the tail portion 31 is continuous with the motor housing portion 19 .

[0050] The load bearing portion 29 is arranged in the main body 16, and the load bearing portion 29 has an axial hole 32. A buffer 33 is provided in the load bearing portion 29. The buffer 33 is integrally formed by a rubber-like elastic member. The buffer 33 has an axial hole 34. The axial holes 32 and 34 are arranged with the center line A1 as the center, and the driving blade 25 can move in the axial holes 32 and 34 in the direction of the center line A1. The cover 30 is arranged in the tail portion 31. The nozzle portion 35 is fixed to the tail portion 31 using a threaded member 78, and the nozzle portion 35 has an injection path 36. The injection path 36 is a space or a passage, and the driving blade 25 can move in the injection path 36 in the direction of the center line A1.

[0051] The electric motor 15 is disposed in the motor housing 19. The electric motor 15 has a motor shaft 37, and the motor shaft 37 is rotatably supported by bearings 38 and 39. The motor shaft 37 can rotate around the axis A2. Figure 2 As shown, a battery 40 is provided which is attachable to and detachable from the connection portion 20 , and the battery 40 supplies electric power to the electric motor 15 .

[0052] The storage battery 40 has a storage box 41 and a battery cell stored in the storage box 41. The battery cell is a secondary battery that can be charged and discharged, and the battery cell can use any one of a lithium ion battery, a nickel metal hydride battery, a lithium ion polymer battery, and a nickel cadmium battery. The storage battery 40 is a DC power source. A first terminal is provided in the storage box 41, and the first terminal is connected to the battery cell. A second terminal is fixed to the connecting portion 20, and when the storage battery 40 is installed on the connecting portion 20, the first terminal and the second terminal can be electrically connected.

[0053] like Figure 1 As shown, a gear box 42 is provided in the tail section 31, and a speed reducer 43 is provided in the gear box 42. The speed reducer 43 has an input component 44, an output component 45, and three sets of planetary gear mechanisms. The input component 44 is fixed to the motor shaft 37. The input component 44 and the output component 45 can rotate around the axis A2. The rotational force of the motor shaft 37 is transmitted to the output component 45 via the input component 44. The speed reducer 43 sets the rotation speed of the output component 45 to a lower speed relative to the input component 44.

[0054] The power conversion mechanism 14 is arranged in the cover 30. The power conversion mechanism 14 has a pin wheel shaft 48, a pin wheel 49 fixed to the pin wheel shaft 48, and a pinion mechanism 77 provided on the pin wheel 49. The pin wheel shaft 48 is rotatably supported by bearings 46 and 47. The pinion mechanism 77 has a plurality of pins 77A arranged at intervals in the circumferential direction of the pin wheel 49. The number of protrusions 26A constituting the rack 26 is the same as the number of pins 77A constituting the pinion mechanism 77. The bearing 46 and the bearing 47 are arranged at different positions in the direction of the axis A2, and the bearing 46 is arranged between the reducer 43 and the bearing 47. The power conversion mechanism 14 is arranged between the bearing 46 and the bearing 47 in the direction of the center line A1. The power conversion mechanism 14 converts the rotational force of the pin wheel 49 into the moving force of the impact member 12. The reducer 43, the power conversion mechanism 14 and the protrusion 26A form a power transmission path 109.

[0055] A rotation limiting mechanism 51 is provided in the gear box 42. The rotation limiting mechanism 51 is arranged in the power transmission path between the motor shaft 37 and the pin wheel 49. The rotation limiting mechanism 51 is arranged between the bearing 46 and the output member 45 in the direction of the axis A2. The rotation limiting mechanism 51 is a mechanism that transmits the rotational force of the output member 45 to the pin wheel shaft 48. Regardless of the rotation direction of the output member 45, the rotation limiting mechanism 51 transmits the rotational force of the output member 45 to the pin wheel shaft 48. In addition, the rotation limiting mechanism 51 has a function of preventing the pin wheel shaft 48 from rotating due to the force transmitted from the drive blade 25.

[0056] In addition, a magazine 59 for storing the nails 58 is provided, and the magazine 59 is supported by the nozzle unit 35 and the connection unit 20. The magazine 59 has a feeding mechanism for supplying the nails 58 to the injection path 36.

[0057] A motor substrate 60 is provided in the motor housing portion 19. Figure 5 The inverter circuit 61 shown in FIG. 61 has a plurality of switch elements, and the plurality of switch elements can be individually switched on and off.

[0058] like Figure 2 As shown, a control substrate 62 is provided in the connecting portion 20, and a Figure 5 The controller 63 shown in FIG. 6 is a microcomputer having an input port, an output port, a central processing unit, and a storage device. The controller 63 is connected to the second terminal and the inverter circuit 61 .

[0059] like Figure 1 As shown, the handle 18 is provided with a trigger 66. The trigger 66 is mounted so as to be movable relative to the handle 18. A trigger switch 67 is provided in the handle 18, and the trigger switch 67 switches from off to on, for example, as an operating force is applied to the trigger 66. In addition, the trigger switch 67 switches from on to off, for example, as an operating force is released from the trigger 66.

[0060] A push rod 68 is mounted on the nozzle portion 35. The push rod 68 can move relative to the nozzle portion 35 in the direction of the center line A1. Figure 1 As shown, an elastic member 74 is provided to urge the push rod 68 in the direction of the center line A1. The elastic member 74 is a metal compression coil spring, and the elastic member 74 urges the push rod 68 in a direction away from the buffer 33. A push rod stopper 86 is provided on the nozzle portion 35, and the push rod 68 urged by the elastic member 74 contacts the push rod stopper 86 and stops.

[0061] The nozzle portion 35 is provided with Figure 5 The push switch 69 is shown. When the push rod 68 is pressed against the driven member 70 and the push rod 68 moves a predetermined amount from the position in contact with the push rod stopper 86 in a direction close to the buffer 33, the push switch 69 is turned on. When the force pressing the push rod 68 against the driven member 70 is released and the push rod 68 moves in a direction away from the buffer 33 by the force of the elastic member 74, the push switch 69 is turned off.

[0062] A phase detection sensor 72 is provided to detect the rotation angle, that is, the phase, of the pin wheel 49. The phase detection sensor 72 includes Fig. 6A , Figure 6BThe Hall IC substrate 84 and permanent magnets 85A and 85B shown. The Hall IC substrate 84 is provided at the tail portion 31, and the permanent magnets 85A and 85B are mounted on the pin wheel 49. The permanent magnet 85A is an N pole, and the permanent magnet 85B is an S pole. The permanent magnets 85A and 85B are both in an arc shape, and the permanent magnets 85A and 85B are arranged in the same range in the rotation direction of the pin wheel 49. The Hall IC substrate 84 outputs a signal corresponding to the intensity of the magnetic field formed by the permanent magnets 85A and 85B. The Hall IC substrate 84 is separated from the permanent magnets 85A and 85B. The phase detection sensor 72 is a non-contact sensor.

[0063] like Figure 2 As shown, the air supply button 71 is provided on the connection portion 20. The operator can operate the air supply button 71 to turn it on and off. Figure 5 The current value detection sensor 75 shown detects the current value of the circuit connecting the battery 40 and the electric motor 15. An angle detection sensor 93 is provided to detect the rotation angle of the motor shaft 37 and output a signal. The signal of the trigger switch 67, the signal of the push switch 69, the on / off signal of the air supply button 71, the signal of the phase detection sensor 72, the signal of the current value detection sensor 75, and the signal of the angle detection sensor 93 are input to the controller 63.

[0064] The driver 10 is provided with a display unit 95 on the housing 11. The display unit 95 includes a liquid crystal display and a lamp. The display unit 95 is connected to the controller 63 and displays the usage mode of the driver 10. The display unit 95 uses the power of the battery 40 to function.

[0065] An example of an operation performed by an operator using the driver 10 and an example of control performed by the controller 63 are as follows. The controller 63 determines whether the condition for striking the nail 58 is met. If the trigger switch 67 is turned off and the push switch 69 is turned off, the controller 63 determines that the condition for striking the nail 58 is not met, and turns off all the switch elements of the inverter circuit 61. Therefore, the power of the battery 40 is not supplied to the electric motor 15, and the electric motor 15 stops.

[0066] In addition, the pin 77A of the pinion mechanism 77 engages with the convex portion 26A of the rack 26, and the piston 24 is Figure 3 The piston 24 stops at the standby position between the bottom dead center and the top dead center. When the piston 24 stops at the standby position, the front end 25A of the driving blade 25 is located between the head 58A of the pin 58 and the front end 35A of the nozzle portion 35 in the direction of the center line A1.

[0067] like Figure 3As shown in FIG. 1 , when the piston 24 stops at the standby position and the front end 68A of the push rod 68 is separated from the driven member 70, the push rod 68 stops by contacting the push rod stopper 86. Therefore, the front end 68A of the push rod 68 protrudes from the front end 35A of the nozzle portion 35 by a predetermined amount in the direction of the center line A1. In addition, the front end 68A of the push rod 68 is located in front of the front end 25A of the driving blade 25 in the direction of the center line A1.

[0068] like Figure 1 As shown, the bottom dead center of the piston 24 is the position where the piston 24 is pressed against the buffer 33 in the direction of the center line A1. When the piston 24 is at the bottom dead center, the front end 25A of the driving blade 25 protrudes a predetermined amount from the front end 35A of the nozzle portion 35. The front end 25A of the driving blade 25 is located between the front end 35A and the front end 68A of the push rod 68 in the direction of the center line A1. Figure 1 and Figure 3 In the embodiment, the top dead center of the piston 24 is located at a position where the piston 24 is closest to the pressure chamber 13 in the direction of the center line A1.

[0069] Furthermore, the controller 63 detects that the piston 24 is in the standby position based on the voltage of the signal output from the Hall IC substrate 84, and the controller 63 stops the electric motor 15. Fig. 6A , the controller 63 detects that the voltage of the signal of the Hall IC substrate 84 is Figure 7 The voltage V2 shown indicates that the piston 24 is located at the standby position.

[0070] When the electric motor 15 stops, the rotation limiting mechanism 51 holds the piston 24 in the standby position. The piston 24 and the driving blade 25 receive the force of the pressure chamber 13, and the force received by the driving blade 25 is transmitted to the pin wheel shaft 48 via the pin wheel 49. Figure 3 When the piston 24 is subjected to a clockwise rotational force, the rotation limiting mechanism 51 blocks the rotational force and prevents the pin wheel shaft 48 from rotating. Figure 3 standby position.

[0071] If the trigger switch 67 is turned on and the push switch 69 is turned on, the controller 63 determines that the condition for striking the nail 58 is met, repeatedly performs control of turning on and off the switch element of the inverter circuit 61, and supplies the power of the battery 40 to the electric motor 15. Then, the motor shaft 37 of the electric motor 15 rotates forward. The rotational force of the motor shaft 37 is transmitted to the pin wheel shaft 48 via the speed reducer 43.

[0072] The motor shaft 37 and the output member 45 rotate in the same direction. When the output member 45 rotates, the rotational force of the output member 45 is transmitted to the pin wheel 49. Figure 3The rotation direction of the pin wheel shaft 48 is the same as the rotation direction of the pin wheel 49. That is, if the motor shaft 37 rotates forward, the pin wheel shaft 48 and the pin wheel 49 rotate in a counterclockwise direction. Figure 3 Rotate counterclockwise.

[0073] If the pin wheel 49 is Figure 3 When the piston 24 rotates counterclockwise, the rotational force of the pin wheel 49 is transmitted to the drive blade 25 and the piston 24, and the piston 24 moves in the direction of the center line A1 toward the pressure chamber 13. That is, the piston 24 moves from the standby position to the top dead center, and the air pressure of the pressure chamber 13 increases.

[0074] When the piston 24 reaches the top dead center, the front end 25A of the driving blade 25 is located above the head 58A of the pin 58. In addition, when the piston 24 reaches the top dead center, the pin 77A of the pinion mechanism 77 is released from the convex portion 26A of the rack 26. Therefore, the piston 24 and the driving blade 25 are moved toward the bottom dead center by the air pressure of the pressure chamber 13. The driving blade 25 hits the head 58A of the pin 58 located in the ejection path 36, and the pin 58 is driven into the driven member 70.

[0075] Furthermore, if the entire nail 58 sinks into the driven member 70 and the nail 58 stops, the front end 25A of the driving blade 25 is separated from the head 58A of the nail 58 due to its reaction force. In addition, the piston 24 hits the buffer 33, and the buffer 33 elastically deforms, thereby absorbing the kinetic energy of the piston 24 and the driving blade 25.

[0076] In addition, the motor shaft 37 of the electric motor 15 also rotates forward after the driving blade 25 hits the pin 58. Then, when the pin 77A of the pinion mechanism 77 engages with the convex portion 26A of the rack 26, the piston 24 is rotated by the rotational force of the pin wheel 49. Figure 1 The controller 63 detects that the piston 24 has reached Figure 3 The electric motor 15 is moved to the standby position to stop.

[0077] When the electric motor 15 stops, the rotation restricting mechanism 51 holds the piston 24 at the standby position. That is, the piston 24 stops at a position ahead of the top dead center while moving from the bottom dead center to the top dead center. Figure 3 The standby position of the piston 24 shown is above the middle of the top dead center and the bottom dead center in the direction of the center line A1. In addition, the stroke of the piston 24 from the bottom dead center to the standby position exceeds 1 / 2 of the stroke of the piston 24 from the bottom dead center to the top dead center.

[0078] In the driver 10, the standby position of the piston 24 is set between the top dead center and the bottom dead center. Therefore, the time required for driving one nail 58 can be shortened, and the workability is improved. The required time is the time from the moment when the trigger switch 67 is turned on and the push switch 69 is turned on to make the piston 24 start to move to the top dead center to the time when the driving blade 25 drives the nail 58 into the driven workpiece 70.

[0079] (Control Example 1) When the air pressure in the pressure chamber 13 of the driver 10 decreases, or when the actual driving force of the driver 10 is lower than the target driving force, the operator can inject air into the pressure chamber 13. The actual driving force of the driver 10 is determined by the maximum pressure of the pressure chamber 13 when the piston 24 is at the top dead center and the pressure-bearing area of ​​the piston 24. The pressure-bearing area of ​​the piston 24 is the area of ​​the piston 24 that bears the pressure of the pressure chamber 13 when viewed from a plane perpendicular to the center line A1.

[0080] The maximum pressure of the pressure chamber 13 is determined by the compression ratio corresponding to the stroke amount of the piston 24. The compression ratio is a value obtained by dividing the maximum volume of the pressure chamber 13 by the minimum volume of the pressure chamber 13. The minimum volume of the pressure chamber 13 is the volume of the pressure chamber 13 when the piston 24 is at the top dead center. The maximum volume of the pressure chamber 13 in this embodiment is understood to be the volume of the pressure chamber 13 when the piston 24 stops in order to inject compressed air into the pressure chamber 13.

[0081] In the single-body driver 10, the pressure receiving area of ​​the piston 24 is fixed, so the actual driving force of the driver 10 can be adjusted by adjusting the maximum pressure of the pressure chamber 13. The pressure for determining the driving force is determined within a predetermined upper limit range defined by the main body 16 of the driver 10, and is determined by conditions such as the length of the nail 58 and the hardness of the driven workpiece 70. The longer the nail 58 is and the higher the hardness of the driven workpiece 70 is, the greater the target driving force required is.

[0082] based on Figure 8 The control example 1 of the embodiment of the present invention will describe the operation of the operator injecting air into the pressure chamber 13 and the control example performed by the controller 63. In step S10, the controller 63 detects that the piston 24 stops at the standby position and the air supply button 71 is turned on, and performs the judgment of step S11. In step S11, the controller 63 judges whether the trigger switch 67 is turned on and the push switch 69 is turned on within a specified time after the air supply button 71 is turned on.

[0083] If the controller 63 determines that the result is yes in step S11, the controller 63 moves the piston 24 from the standby position toward the bottom dead center in step S12. Specifically, the electric motor 15 is reversed. Figure 3 The piston 24 rotates in a clockwise direction and moves toward the bottom dead center.

[0084] Then, if the controller 63 detects that the piston 24 moves to Figure 1 The controller 63 detects that the piston 24 moves from the standby position to the bottom dead center from the signal of the angle detection sensor 93. When the piston 24 stops at the bottom dead center, the front end 25A of the driving blade 25 protrudes from the front end 35A of the nozzle portion 35 in the direction of the center line A1.

[0085] When the piston 24 stops at the bottom dead center, the operator performs the air replenishment operation in step S13. In step S13, the adapter 83 is connected to the valve 80, and the pressure of the compressed air supplied from the gas compressor 81 is reduced by the pressure regulator 94 and supplied to the pressure chamber 13. The pressure of the compressed air supplied to the pressure chamber 13 is set according to the target driving force of each model of the driving machine 10.

[0086] If the air replenishment operation is completed, the operator turns off the air replenishment button 71. If the controller 63 detects that the air replenishment button 71 is turned off in step S14, in step S15, the electric motor 15 is reversed to move the piston 24 toward the top dead center and stop the piston 24 at the standby position. Then, in step S16, the controller 63 selects the nailing mode and ends the operation. Figure 8 Control Example 1. The control of moving the piston 24 from the bottom dead center to the standby position after supplying compressed air to the pressure chamber 13 in this way is the fourth control.

[0087] If the controller 63 determines that it is not in step S11, the process proceeds to step S16. When the controller 63 selects the nail driving mode, if the trigger switch 67 is turned on and the push switch 69 is turned on, the electric motor 15 is rotated forward to drive the nail 58, and then the piston 24 is moved to the standby position to stop the electric motor 15. In addition, when the controller 63 selects the nail driving mode, if at least one of the trigger switch 67 and the push switch 69 is turned off, the electric motor 15 is stopped and the piston 24 is stopped at the standby position.

[0088] As described above, when the compressed air is injected into the pressure chamber 13, the piston 24 is stopped at the bottom dead center. Therefore, the pressure of the air injected into the pressure chamber 13 can be set low.

[0089] (Control Example 2) Based on Fig. 9 The control example 2 of the embodiment of the present invention will describe the operation of injecting air into the pressure chamber 13 by the operator and the control example performed by the controller 63. Fig. 9 In control example 2, Figure 8 The same processing steps as in Control Example 1 are marked with Figure 8 Same step number. Fig. 9In control example 2, if the controller 63 determines YES in step S11, the process proceeds to step S20, and moves the piston 24 from the standby position to the adjustment position.

[0090] That is, the electric motor 15 is reversed to make the pin wheel 49 Figure 3 The piston 24 is rotated clockwise to move from the standby position to the bottom dead center. Figure 4 When the adjustment position is reached, the electric motor 15 is stopped. If the positional relationship between the Hall IC substrate 84 and the permanent magnets 85A and 85B is Figure 6B The controller 63 detects that the voltage of the signal of the Hall IC substrate 84 changes from Figure 7 The voltage V2 shown decreases to the voltage V1, and it is determined that the piston 24 has reached the adjustment position.

[0091] Figure 4 The adjustment position of the piston 24 shown is between the top dead center and the bottom dead center, more specifically, between the bottom dead center and the standby position. The adjustment position of the piston 24 is lower than the middle of the top dead center and the bottom dead center in the direction of the center line A1. The stroke amount of the piston 24 from the bottom dead center to the adjustment position is less than 1 / 2 of the stroke amount of the piston 24 from the bottom dead center to the top dead center.

[0092] In step S13 following step S20, the air supply operation is performed. If the controller 63 detects that the air supply button 71 is turned off in step S14, the process proceeds to step S16. If the determination result in step S11 is negative, the process proceeds to step S16.

[0093] exist Fig. 9 In the control example 2, from the state where the piston 24 stops at the adjustment position, the process proceeds to step S16 via step S14 to select the nail driving mode. Fig. 9 Control Example 2 enters step S16. If the trigger switch 67 is turned on and the push switch 69 is turned on, the piston 24 moves from the adjustment position toward the top dead center.

[0094] Therefore, if Fig. 9 Control Example 2 can be obtained by Figure 8 The same effect as in the case of Control Example 1.

[0095] In addition, if the piston 24 is Figure 4 As shown in the figure, the front end 25A of the driving blade 25 is located at the same position as the front end 35A of the nozzle portion 35 in the direction of the center line A1. In this state, the process proceeds to step S16, and if the push rod 68 is pressed to the driven member 70, the push switch 69 is turned on before the front end 25A of the driving blade 25 contacts the driven member 70. That is, the push switch 69 is smoothly switched from off to on, and the nail 58 is driven.

[0096] As described above, when compressed air is injected into the pressure chamber 13, the piston 24 can be stopped at a position other than the top dead center, such as an adjustment position such as the bottom dead center. The adjustment position of the piston 24 can be changed arbitrarily. The closer the position where the piston 24 is stopped is to the bottom dead center, the lower the supplementary pressure can be set. In other words, when the pressure chamber 13 is supplemented with compressed gas from a pressure supply mechanism whose supply pressure value is fixed, and a pressure regulator 94 of a type that is adjusted not to an arbitrary pressure but to one or more specified pressure values, the specified pressure of the filled pressure chamber 13 can be set arbitrarily by changing the stop position of the piston 24. Therefore, the actual driving force of the driving machine 10 can be set to a value corresponding to the target driving force.

[0097] Furthermore, if the actual driving force is adjusted for each model of the driver 10 by changing the stop position of the piston 24, the pressure regulator 94 can be shared even when the models of the driver 10 are different. That is, even when the target driving force for each model of the driver 10 is different, there is no need to change the pressure regulator 94, and the workability is improved.

[0098] (Example of Phase Detection Sensor) Next, refer to Fig. 10A , Fig. 10B , another example of the phase detection sensor 72 is described. In the phase detection sensor 72, the permanent magnet 85A and the permanent magnet 85B are arranged at different positions in the rotation direction of the pin wheel 49. The Hall IC substrate 84 has a Hall element 84A for detecting the permanent magnet 85A and a Hall element 84B for detecting the permanent magnet 85B.

[0099] The Hall element 84A detects the magnetic field formed by the permanent magnet 85A and outputs a signal. The Hall element 84B detects the magnetic field formed by the permanent magnet 85B and outputs a signal. The Hall element 84A is separated from the permanent magnet 85A, and the Hall element 84B is separated from the permanent magnet 85B. That is, the phase detection sensor 72 is a non-contact sensor. Fig.11 The line graph of FIG. 8 shows an example of the voltage of the signal of the Hall elements 84A and 84B. Fig.11 In FIG. 8 , the vertical axis represents voltage, and the horizontal axis represents the rotation angle of the pin wheel 49. The voltage of the signal of the Hall element 84A is represented by a solid line, and the voltage of the signal of the Hall element 84B is represented by a dotted line.

[0100] In such Fig. 10A When the pin wheel 49 shown in the figure rotates in the counterclockwise direction, if Fig.11 As shown, when the signal of the Hall element 84A rises from the voltage V2 to the voltage V4, the controller 63 determines that the piston 24 has reached the standby position.

[0101] like Fig. 10BAs shown, the pin wheel 49 rotates in the clockwise direction, and the piston 24 descends from the standby position. Fig.11 As shown, when the signal of the Hall element 84B rises from the voltage V1 to the voltage V3, the controller 63 determines that the piston 24 has reached the adjustment position.

[0102] Fig. 12A , Fig. 12B Another example of the phase detection sensor 72 is shown. The phase detection sensor 72 includes a cam 87 and a contact switch 88 provided on the pin wheel 49. The cam 87 includes a cam surface 87A having a radius centered on the axis A2 and a cam surface 87B having a larger radius than the cam surface 87A. The cam surface 87A and the cam surface 87B are provided in different ranges in the rotation direction of the pin wheel 49 and are connected to each other. The contact switch 88 includes a contact piece 88A, and the contact piece 88A contacts the cam surfaces 87A and 87B. Fig. 12A , Fig. 12B The phase detection sensor 72 shown is a contact sensor.

[0103] Fig.13 Shows from Fig. 12A , Fig. 12B An example of the voltage of the signal output by the phase detection sensor 72. Fig.13 In FIG. 4 , the vertical axis represents voltage and the horizontal axis represents the rotation angle of the pin wheel 49. Fig. 12A When the pin wheel 49 rotates counterclockwise, the contact portion of the contact piece 88A switches from the cam surface 87A to the cam surface 87B. Fig.13 As shown, when the voltage V1 increases to the voltage V2 , the controller 63 determines that the piston 24 has reached the standby position.

[0104] like Fig. 12B As shown, the pin wheel 49 rotates in the clockwise direction, the piston 24 descends from the standby position, and the contact portion of the contact piece 88A switches from the cam surface 87B to the cam surface 87A. Fig.13 As shown, when the voltage V2 decreases to the voltage V1 , the controller 63 determines that the piston 24 has reached the adjustment position.

[0105] Fig.14A , Fig. 14B Another example of the phase detection sensor 72 is shown. The phase detection sensor 72 includes cams 89, 90 and contact switches 91, 92 provided on the pin wheel 49. The cams 89, 90 are arranged at different positions in the rotation direction of the pin wheel 49 and at different positions in the direction of the axis A2. The cams 89, 90 protrude in the radial direction of the pin wheel 49.

[0106] The contact switches 91 and 92 are arranged at different positions in the direction of the axis A2. The contact switch 91 has a contact piece 91A, which contacts the cam 89 to detect the rotation angle of the pin wheel 49. The contact switch 92 has a contact piece 92A, which contacts the cam 90 to detect the rotation angle of the pin wheel 49. Fig.14A , Fig. 14B The illustrated phase detection sensor 72 is a contact sensor.

[0107] Fig.15 Shows from Fig.14A , Fig. 14B An example of the voltage of the signal output by the phase detection sensor 72. Fig.15 In FIG. 4 , the vertical axis represents voltage, and the horizontal axis represents the rotation angle of the pin wheel 49. The voltage of the signal of the contact switch 91 is represented by a solid line, and the voltage of the signal of the contact switch 92 is represented by a dotted line. Fig.14A When the pin wheel 49 rotates counterclockwise, the contact piece 91A contacts the cam 89. Fig.15 As shown, when the voltage V2 increases to the voltage V4 , the controller 63 determines that the piston 24 has reached the standby position.

[0108] The pin wheel 49 rotates in the clockwise direction, the piston 24 descends from the standby position, and the contact piece 92A contacts the cam 90. Fig.15 As shown, when the voltage V1 increases to the voltage V3 , the controller 63 determines that the piston 24 has reached the adjustment position.

[0109] (Control Example 3) Based on Fig.16 Control Example 3 of the present invention will now be described an operation in which an operator injects air into the pressure chamber 13 and a control example performed by the controller 63. Fig.16 The control example 3 is performed in a state where the nail 58 is taken out from the magazine 59. In addition, if the magazine 59 can be detached relative to the housing 11, the magazine 59 can also be removed from the housing 11.

[0110] The controller 63 stops the impact member 12 at the standby position in step S21. That is, the piston 24 is located at the standby position. If the air supply button 71 is turned on in step S22, the controller 63 causes the display unit 95 to display that the maintenance mode is selected. The operator applies an operating force to the trigger 66 and presses the push rod 68 to the driven member 70 in step S23. If the controller 63 detects that the trigger switch 67 is turned on and the push switch 69 is turned on, the controller 63 rotates the electric motor 15 forward within a specified angle range in step S24, and then stops the electric motor 15.

[0111] When the impact member 12 reaches the top dead center, the pin 77A and the projection 26A are released, and the impact member 12 moves from the top dead center to the bottom dead center. Then, the operator determines whether the impact member 12 has reached the bottom dead center in step S25. The operator can determine whether the impact member 12 has reached the bottom dead center by the vibration of the handle 18.

[0112] If the operator determines that the answer is No in step S25, the operator repeats the operation of pressing the trigger 66 and pressing the push rod 68 to the driven part 70. If the operator determines that the answer is Yes in step S25, the operator performs the air replenishment operation in step S26. The air replenishment operation in step S26 is the same as the air replenishment operation in step S13. Fig.16 In the control example 3, the operator performs the air replenishment operation in a state where the piston 24 is pressed to the buffer 33 by the air pressure and the piston 24 stops at the bottom dead center.

[0113] After the air supply operation in step S26 is completed, the operator turns off the air supply button 71 to cancel the maintenance mode. In addition, if the controller 63 detects that the trigger switch 67 is turned on and the push switch 69 is turned on in step S28, the electric motor 15 is rotated forward in step S29 to move the piston 24 from the bottom dead center to the standby position, and the electric motor 15 is stopped to end the control example 3. The control of moving the piston 24 from the bottom dead center to the standby position after supplying compressed air to the pressure chamber 13 in this way is the fourth control.

[0114] Control Example 3 Before the compressed air is injected into the pressure chamber 13, the electric motor 15 is repeatedly rotated and stopped. Then, the piston 24 reaches the top dead center, the convex portion 26A is released from the pin 77A, and the piston 24 moves from the top dead center to the bottom dead center by the air pressure of the pressure chamber 13. The piston 24 hits the buffer 33 and stops. In this state, the air replenishment operation is performed. Therefore, the air pressure injected into the pressure chamber 13 can be set low.

[0115] In addition, Fig.16 In step S25, the controller 63 can also determine whether the piston 24 has reached the bottom dead center. The controller 63 processes the signal output from the phase detection sensor 72, thereby being able to determine whether the piston 24 has reached the bottom dead center. Moreover, if the controller 63 determines that it is No in step S25, the controller 63 causes the display unit 95 to display that it is not in a state where air can be supplemented, and the operator performs the operation of step S23. On the other hand, if the controller 63 determines that it is Yes in step S25, the controller 63 causes the display unit 95 to display that it is in a state where air can be supplemented, and the operator performs the operation of step S26.

[0116] Furthermore, an interruption step may be performed between step S25 and step S26. In this interruption step, the electric motor 15 is rotated forward to move the piston 24 away from the buffer 33, and the piston 24 is stopped at an adjustment position between the standby position and the bottom dead center.

[0117] Reference Fig.17 and Fig.18 , another example of the driver 10 will be described. Fig.17 and Fig.18 The speed reducer 43 shown has a rotating element 96, and the rotating element 96 is arranged in the gear box 42. The rotating element 96 is connected to the input member 44 so as to be rotatable as a whole. In addition, the rotating element 96 is connected to the output member 45 so as to be power-transmissible. The rotating element 96 is rotatable around the axis A2.

[0118] Fig.17 and Fig.18 The driver 10 shown has a rotation limiting mechanism 108. Fig.19 and Fig. 20 , the structure of the rotation limiting mechanism 108 is described. A plurality of engaging portions 97 are provided on the outer peripheral surface of the rotating element 96. The engaging portions 97 are arranged at intervals in the rotation direction of the rotating element 96. The engaging portion 97 has an engaging surface 98 extending in the radial direction of the rotating element 96 and a curved surface 99. The curved surface 99 connects the front end of the engaging portion 97 and the inner end of the engaging surface 98.

[0119] A cylinder 100 is fixed to the outer surface of the motor housing 19. A plunger 101 is provided in the cylinder 100, and a spring 102 is provided to urge the plunger 101. A hole 103 is provided in the motor housing 19, and a hole 104 is provided in the gear box 42. A part of the plunger 101 is arranged in the holes 103 and 104, and the front end of the plunger 101 is arranged in the gear box 42. The spring 102 is a metal compression spring, and the spring 102 urges the plunger 101 toward the rotating element 96. The plunger 101 has a flange 105, and the flange 105 is arranged in the cylinder 100. The rod 106 can move in the radial direction of the rotating element 96.

[0120] The rod 106 is mounted on the cylinder 100. The rod 106 can move within a predetermined angle range with the support shaft 107 as a fulcrum. The first end of the rod 106 is arranged outside the cylinder 100, and the second end of the rod 106 is arranged inside the cylinder 100. The flange 105 is pressed to the second end of the rod 106 by the force of the spring 102. The rod 106, the plunger 101, the spring 102, and the engaging portion 97 constitute a rotation limiting mechanism 108. The rotation limiting mechanism 108 has a function of allowing the rotating element 96 to rotate with the power of the electric motor 15. Fig.19 Function of rotating in counter-clockwise direction.

[0121] When the impact member 12 is urged toward the bottom dead center by the air pressure in the pressure chamber 13, the rotation restricting mechanism 108 has the function of preventing the rotating element 96 from rotating. Fig.19 The first state of rotating in the clockwise direction and allowing the rotating element 96 to rotate in the Fig. 20 The second state rotates in a clockwise direction.

[0122] Next, the function and action of the rotation limiting mechanism 108 when the driver 10 is used to drive the nail 58 will be described. If the operator does not apply an operating force to the rod 106, the first end of the plunger 101 urged by the force of the spring 102 is located in the gear box 42. If the electric motor 15 rotates forward, the rotating element 96 rotates in the gear box 42. Fig.19 When the piston 101 is rotated counterclockwise, the first end of the plunger 101 moves along the curved surface 99.

[0123] Therefore, the plunger 101 moves in a direction away from the rotating element 96 against the force of the spring 102. When the first end of the plunger 101 passes over the engaging portion 97, the plunger 101 moves in a direction close to the rotating element 96 due to the elastic force of the spring 102. During the forward rotation of the electric motor 15, the above-mentioned action is repeated, and the rotating element 96 is moved by the power of the electric motor 15. Fig.19 Then, the rotation force of the rotating element 96 is transmitted to the pin wheel 49, and the impact piece 12 moves toward the top dead center while the projection 26A is engaged with the pin 77A.

[0124] When the piston 24 reaches the standby position and the electric motor 15 stops, the piston 24 is urged by the pressure in the pressure chamber 13, and the pin wheel 49 is subjected to a rotational force. Then, the rotational force borne by the pin wheel 49 is transmitted to the rotating element 96, and the rotating element 96 is Fig.19 Then, the engaging surface 98 of the engaging portion 97 engages with the first end of the plunger 101, thereby preventing the rotation of the rotating element 96. Therefore, the piston 24 is held in the standby position.

[0125] Furthermore, the function and operation of the rotation limiting mechanism 108 during maintenance of the driver 10 are described. The maintenance includes air replenishment. During maintenance of the driver 10, the electric motor 15 is stopped, such as Fig.19 As shown, the engaging portion 97 engages with the first end portion of the plunger 101 , and the rotating element 96 stops.

[0126] Here, if the operator applies an operating force to the rod 106, Fig. 20As shown in FIG. 1 , the rod 106 is moved at a predetermined angle, and the plunger 101 is moved away from the rotating element 96 by the operating force of the rod 106 and stops. Therefore, the first end of the plunger 101 moves into the hole 104, and the first end of the plunger 101 is released from the engaging portion 97. Then, the rotating element 96 is rotated by the rotation force transmitted from the piston 24. Fig. 20 The piston 24 rotates clockwise in the middle of the piston 24, and the piston 24 moves from the standby position toward the bottom dead center by the air pressure of the pressure chamber 13. The piston 24 collides with the buffer 33 and stops, and the rotating element 96 also stops. The operator recognizes through touch that the piston 24 collides with the buffer 33 and stops, and then releases the operating force applied to the rod 106.

[0127] In this way, when the driver 10 is maintained, the rotating element 96 can be kept in a stable state. Fig. 20 Therefore, when the piston 24 stops at the standby position, even if Fig.21 The engagement state between the pin 77A and the convex portion 26A shown in the figure is not appropriate. By combining the action of driving the blade 25 to descend, it is also possible to allow the pin wheel 49 to be moved in the Fig.21 Therefore, the protrusion 26A is separated from the engaged pin 77A, as shown in FIG. Fig. 22 As shown, it is possible to avoid collision between the projection 26A and other pins 77A.

[0128] In the driver 10 having the rotation limiting mechanism 108, if the controller 63 detects whether an operating force is applied to the lever 106, it is possible to execute Figure 8 , Fig. 9 , Fig.16 In this case, in step S10 or step S22, instead of detecting that the gas replenishment button is turned on, it is detected that the operating force is applied to the rod 106. In addition, in step S14 or step S27, instead of detecting that the gas replenishment button is turned off, it is detected that the operating force of the rod 106 is released.

[0129] The controller 63, the inverter circuit 61, the electric motor 15, and the power transmission path 109 are explained below. Figure 5 An example of the control mechanism 110 shown. The controller 63, the trigger switch 67 and the push switch 69 are condition determination units. The valve 80 is a gas injection unit, the top dead center is the first position, and the bottom dead center is the second position. The control to stop the piston 24 at the standby position is the first control.

[0130] As in the control example 3, after the electric motor 15 is rotated forward, the electric motor 15 is stopped with the pinion mechanism 77 and the convex portion 26A released, and the piston 24 is allowed to come into contact with the damper 33 and stop. This is the second control.

[0131] As in control example 1, the electric motor 15 is reversed to move the piston 24 from the standby position to the bottom dead center, and the piston 24 is allowed to contact the buffer 33 and stop. This is the third control. As in control example 2, the electric motor 15 is reversed to move the piston 24 from the standby position to the adjustment position, and the piston 24 is allowed to stop at a position separated from the buffer 33. This is the third control. The nozzle part 35 is an injection part, and the nail 58 is an example of a fastener.

[0132] The air replenishment button 71 is an example of the first operating unit, the second operating unit, and the third operating unit. That is, the physically identical element, that is, the single air replenishment button 71 serves as the first operating unit, the second operating unit, and the third operating unit. The push rod 68 is a pressing component. The trigger 66 and the push switch 69 are pressing sensors, and the pin wheel 49 is a rotating element. The electric motor 15 is a motor, and the phase detection sensor 72 and the controller 63 are detection mechanisms. In the above embodiment, the top dead center, the bottom dead center, the standby position, and the adjustment position of the impact member 12 are respectively described with reference to the piston 24, but with respect to the drive blade 25, the top dead center, the bottom dead center, the standby position, and the adjustment position of the impact member 12 can also be grasped.

[0133] Furthermore, the engagement of the pinion mechanism 77 and the convex portion 26A corresponds to the connection of the power transmission path. The release of the pinion mechanism 77 and the convex portion 26A corresponds to the disconnection of the power transmission path. When the pinion wheel 49 is rotated by the power of the electric motor 15, Figure 3 and Figure 4 , the rotation direction of the electric motor 15 that rotates the pin wheel 49 counterclockwise is the first rotation direction. The rotation direction of the electric motor 15 that rotates the pin wheel 49 clockwise is the second rotation direction. That is, the forward rotation of the electric motor 15 is the first rotation direction, and the reverse rotation of the electric motor 15 is the second rotation direction.

[0134] Furthermore, if Fig.19 The state in which the plunger 101 is engaged with the engaging portion 97 is the first state of the rotation limiting mechanism 108. Fig. 20 The state in which the plunger 101 is released from the engaging portion 97 is the second state of the rotation restricting mechanism 108 .

[0135] In addition, the buffer 33 is an example of a stopper. Furthermore, the adjustment position of the impact member 12 includes a case where the piston 24 stops at the bottom dead center in addition to the case where the piston 24 is located between the standby position and the bottom dead center. In addition, when the piston 24 stops at the adjustment position, the front end 25A of the driving blade 25 can also protrude from the front end 35A of the nozzle portion 35 in the moving direction of the impact member 12, that is, the direction of the center line A1. Furthermore, the rotating element 96, the engaging portion 97, and the plunger 101 are an example of a clutch mechanism, and the rod 106 is an example of a release mechanism.

[0136] The rotating element 96 utilizes the rotational force of the electric motor 15 to rotate Fig.19 The counterclockwise rotation direction is the positive rotation of the rotating element 96. Fig. 20 The clockwise rotation direction is the reverse rotation of the rotating element 96 .

[0137] The driver is not limited to the above-mentioned embodiment, and various modifications can be made without departing from the scope of the main purpose. For example, a bellows and a piston can be connected to form an air pressure chamber in the bellows. When a bellows is used, the guide member for guiding the movement of the impact piece can be a rail instead of a cylinder.

[0138] The control mechanism and the condition judgment unit include a processor, a circuit, a storage device, a module and a unit. The motor that moves the impact member from the second position to the first position includes a hydraulic motor and a pneumatic motor in addition to an electric motor. The electric motor can be any one of a brushed motor and a brushless motor. The power supply of the electric motor can be any one of a DC power supply and an AC power supply.

[0139] The detection mechanism includes a contact sensor and a non-contact sensor. The non-contact sensor includes a magnetic sensor and an optical sensor. In addition to a mechanism that detects the rotation angle or phase of the pin wheel and indirectly detects the position of the impact piece based on the detection result, the detection mechanism also includes a mechanism that directly detects the position of the impact piece itself. The mechanism that directly detects the position of the impact piece itself includes a magnetic component installed on the impact piece and a magnetic sensor that detects the magnetic component. In addition to the rack and pinion mechanism, the power conversion mechanism also includes a cam mechanism. The rotating element is an element that transmits rotational force from the motor. In addition to the pin wheel 49, the rotating element also includes a gear, a pulley, and a rotating shaft.

[0140] In addition, in reference Figure 3 , Figure 4 , Fig. 6A , Figure 6B , Fig. 12A , Fig. 12B , Fig.14A , Fig. 14B as well as Figure 19 to Figure 22In the description of the invention, it is recorded that the pin wheel 49 rotates in the counterclockwise direction and the clockwise direction. Figure 3 The state of the front view of the driver 10 is conveniently defined by the rotation direction of the pin wheel 49. The driven part 70 includes a floor, a wall, a ceiling, a column, and a roof. The material of the driven part 70 includes wood, concrete, and gypsum.

[0141] Explanation of symbols

[0142] 10—driver, 12—impact member, 13—pressure chamber, 14—power conversion mechanism, 15—electric motor, 63—controller, 25A, 35A, 68A—front end, 26—rack, 49—pin wheel, 58A—head, 61—inverting circuit, 66—trigger, 67—trigger switch, 68—push rod, 69—push switch, 71—air replenishment button, 72—phase detection sensor, 77—pinion mechanism, 80—valve, 96—rotating element, 97—engaging part, 101—plunger, 106—rod, 108—rotation limiting mechanism, 109—power transmission path, 110—control mechanism.

Claims

1. A driver, comprising: an impact member that moves from a first position toward a second position to impact the fastener; a pressure chamber enclosing a gas for moving the impact member from the first position to the second position; A control mechanism having a motor and utilizing power of the motor to move the impact member from the second position to the first position against the force of the pressure chamber; and An operating unit for actuating the control mechanism. The above-mentioned driver is characterized in that: A gas injection portion is provided for allowing the gas to be injected into the pressure chamber from outside the driver. The control mechanism can be set by the operator as the first control and the second control. When the first control is set, the impact member is released at the first position and moves toward the second position by operating the operating unit, and moves from the second position to the first position and stops at a standby position separated from the second position. When the second control is set, the impact member is allowed to stop at the second position or at an adjustment position close to the second position. The device further comprises a switch for an operator to set the first control and the second control. By setting the second control using the switch and operating the operating portion, the control mechanism can move the impact member to the second position or an adjustment position close to the second position.

2. The driver according to claim 1, characterized in that: It also has a battery. The motor and the control mechanism are operated by the power supplied from the battery.

3. The driver according to claim 1, characterized in that: With respect to the above-mentioned control bodies, When the first control is set and the operating unit is operated, the motor is rotated by a predetermined amount in the first direction, so that the impact member stops at the standby position after striking the fastener. When the second control is set and the operating unit is operated, the motor is rotated in the first direction by an amount less than the predetermined amount, and the impact member is stopped at the second position or at an adjustment position close to the second position.

4. The driver according to claim 1, characterized in that: When the impact member stops at the second position or at an adjustment position close to the second position, the first control is set by the switch and the operation portion is operated, so that the control mechanism moves the impact member to the standby position and stops.

5. The driver according to claim 1, characterized in that: A detection mechanism is provided, which detects that the impact member is located at the second position or an adjustment position close to the second position.

6. The driver according to claim 5, characterized in that: A notification mechanism is provided for notifying an operator that the impact member is located at the second position or at an adjusted position close to the second position.

7. The driver according to claim 1, characterized in that: An ejection unit is provided, the ejection unit is supplied with the fastener and the impact piece is movably arranged, The front end of the impact piece stopped at the adjustment position protrudes from the front end of the ejection portion in the moving direction of the impact piece.

8. A driver, comprising: an impact member that moves from a first position toward a second position to impact the fastener; a pressure chamber enclosing a gas for moving the impact member from the first position to the second position; A control mechanism having a motor and utilizing power of the motor to move the impact member from the second position to the first position against the force of the pressure chamber; and An operating unit for actuating the control mechanism. The above-mentioned driver is characterized in that: A gas injection portion is provided for allowing the gas to be injected into the pressure chamber from outside the driver. The control mechanism can be set by the operator as the first control and the second control. When the first control is set, the impact member is released at the first position and moves toward the second position by operating the operating unit, and moves from the second position to the first position and stops at a standby position separated from the second position. When the second control is set, the impact member is allowed to stop at the second position or at an adjustment position close to the second position. A detection mechanism is also provided, which detects whether the impact member is located at the second position or an adjustment position close to the second position.

Images