JP6790629B2 - Driving machine - Google Patents

Description

The present disclosure relates to a driving machine that strikes a stopper of an injection portion with a striking portion.

Patent Document 1 describes an example of a driving machine that strikes a stopper of an injection portion with a striking portion. The driving machine described in Patent Document 1 has an injection portion, a magazine for sending a stopper to the injection portion, a striking portion for striking the stopper in the injection portion, and a power unit having a built-in striking portion. .. The power unit has a handle, a start switch, a trigger, and a start lever. The start lever is reciprocating, and the start lever includes an upper start lever and a lower start lever. The upper start lever has a hook lever. The magazine comprises a feeder that feeds the stopper, which has an engaging portion.

The driving machine described in Patent Document 1 does not engage the engaging portion and the hooking lever when a sufficient number of fasteners remain in the magazine. Therefore, the upper start lever and the lower start lever are engaged, and the start switch can be turned on when the user presses the lower start lever against the material to be driven and operates the trigger. That is, the driving machine can hit the stopper.

On the other hand, when the number of fasteners in the magazine becomes less than the set number, the engaging portion contacts the hook lever and pushes down the hook lever. Then, the upper start lever and the lower start lever are separated from each other. Therefore, even if the user presses the lower start lever against the material to be driven and operates the trigger, the start switch cannot be turned on. That is, the driving machine does not start. Therefore, the user can recognize that the hitting prevention of the driving machine is effective.

JP-A-2002-210676

As a method different from the above-mentioned method of the blank hitting prevention mechanism in the nailing machine, a method of restricting the movement of the starting lever, that is, the pressing member can be considered. When such a structure is assumed, a structure for avoiding a blank driving problem due to interference between the nail feeding mechanism and the pressing member is required as in the above-mentioned conventional technique. The nail feed mechanism is a feeder and an engaging portion.

An object of the present disclosure is to provide a driving machine capable of preventing a blank shot by smoothly performing an operation of sending a stopper housed in a magazine to an injection unit.

The driving machine of one embodiment strikes a magazine holding a stopper, an injection portion to which the stopper is sent from the magazine, and the stopper sent to the injection portion to drive the stopper into the material to be driven. A driving machine provided with a striking portion, which is provided on the injection portion and is provided on the magazine with a pressing member that moves with respect to the injection portion when pressed against the material to be driven. A feeder that moves in a direction approaching the injection portion and sends the stopper to the injection portion, and a feeder that is movable in a direction approaching the injection portion with respect to the magazine and engages with the pressing member. The stopper has a stopper that can be released, an urging member that urges the feeder to approach the injection portion, and a moving force transmitting member that transmits the moving force of the feeder to the stopper. When the number of the stoppers held by the magazine is equal to or greater than a predetermined number, the pressing member is released from the pressing member to allow the pressing member to move, and the stopper has a number of the stoppers held by the magazine. If it is less than a predetermined number, it engages with the pressing member to prevent the pressing member from moving, and in the feeder, the pressing member is pressed against the driven material and the stopper is pressed against the pressing member. If the movement of the stopper in contact with is inhibited, Ri feed the fastener to the injection unit, the moving force transmitting member, the number of the fastener in which the magazine is held is equal to or greater than a predetermined number does not transmit the moving force of the feeder to the stopper, the moving force transmitting member, the number of the fastener in which the magazine is held by that be transmitted is less than a predetermined number of moving force of the feeder to the stopper.

In one embodiment of the driving machine, the operation of feeding the stopper housed in the magazine to the injection unit can be smoothly performed.

It is a side view of the driving machine which is an embodiment of this invention. It is sectional drawing which shows the inside of the driving machine. It is a side view which shows the main part of a driving machine. It is a figure which shows the motion conversion mechanism of a driving machine. It is a figure which shows the structure of the magazine provided in the driving machine. It is a figure which shows the operation of a driving machine. It is a figure which shows the operation of a driving machine. It is a schematic diagram which shows the operation of a driving machine. It is a schematic diagram which shows the operation of a driving machine. It is a schematic diagram which shows the operation of a driving machine. It is a schematic diagram which shows the operation of a driving machine. It is a figure which shows the operation of a driving machine. It is a figure which shows the operation of a driving machine. It is a figure which shows the operation of a driving machine. It is a figure which shows the operation of a driving machine. It is a block diagram which shows the control system of a driving machine. It is a perspective view which shows the main part of the driving machine. It is a schematic diagram which shows the operation of a driving machine. It is a schematic diagram which shows the operation of a driving machine. It is a schematic diagram which shows the operation of a driving machine. It is a schematic diagram which shows the operation of a driving machine.

Hereinafter, embodiments of the driving machine will be described in detail with reference to the drawings. In each figure, the common elements are designated by the same reference numerals.

The driving machine 10 shown in FIG. 1 has a housing 11. The housing 11 includes a cylinder case 12, a motor case 13 connected to the cylinder case 12, a handle 14 connected to the cylinder case 12, and a mounting portion 15 connecting the handle 14 and the motor case 13. There is.

The cylinder 16 is fixedly provided in the cylinder case 12, and the piston 17 is housed in the cylinder 16. The piston 17 can move in the direction of the center line A1 of the cylinder 16. The driver blade 18 is fixed to the piston 17. The piston 17 and the driver blade 18 form a striking portion 19.

The accumulator container 20 is provided in the cylinder case 12, and the accumulator container 20 is fixed to the cylinder 16. The pressure chamber 21 is formed from the inside of the accumulator container 20 to the inside of the cylinder 16. A sealing member is attached to the outer peripheral surface of the piston 17, and the sealing member airtightly seals the pressure chamber 21. The pressure chamber 21 is filled with gas. The gas may be a compressible gas, and the gas may be an inert gas such as nitrogen gas or a rare gas in addition to air. In the present disclosure, an example in which the pressure chamber 21 is filled with air will be described.

As shown in FIG. 2, the holder 22 is provided in the cylinder case 12, and the holder 22 supports the bumper 23. The bumper 23 is made of rubber or urethane. The bumper 23 is annular and has a shaft hole 24. The driver blade 18 can move in the shaft hole 24 in the direction of the center line A1.

The injection portion 25 projects from the cylinder case 12 in the direction of the center line A1, and the injection portion 25 is provided with an injection path 26. The injection portion 25 has a blade guide 52 shown in FIG. 6A, and an injection path 26 is formed by the blade guide 52. The injection path 26 may be either a gap between the elements or a groove provided in the element. The blade guide 52 has a function of holding the moving posture of the driver blade 18 and a function of holding the moving posture of the stopper 31.

As shown in FIGS. 1 and 3, a push lever 27 is provided in the injection portion 25, and the push lever 27 can move in the center line A1 direction with respect to the injection portion 25. The push lever 27 is urged by an elastic member in a direction away from the bumper 23. The elastic member that urges the push lever 27 includes a metal spring. The push lever 27 is made of a material that is not easily deformed by a load in the center line A1 direction, for example, a metal or a hard resin.

When the operator holds the driving machine 10 and presses the push lever 27 against the material to be driven W1, the push lever 27 moves in a direction approaching the bumper 23 and stops in contact with the first stopper. When the push lever 27 is separated from the object to be driven W1, the push lever 27 moves away from the bumper 23 by the urging force of the elastic member, and the push lever 27 comes into contact with the second stopper and stops at the initial position. ..

The injection portion 25 is provided with the push lever switch 69 shown in FIG. The push lever switch 69 turns off when the push lever 27 is stopped at the initial position. The push lever switch 69 is turned on when the push lever 27 is pressed against the driven material W1 and moves from the initial position.

The driver blade 18 can move in the injection path 26 and the cylinder 16 in the center line A1 direction. The driver blade 18 has a shaft shape, and as shown in FIG. 4, a plurality of convex portions 28 protruding from the edge of the driver blade 18 are provided. The plurality of convex portions 28 are arranged at intervals from each other in the longitudinal direction of the driver blade 18.

As shown in FIG. 1, a long magazine 29 is attached to the housing 11. As shown in FIG. 2, the supply path 30 is provided along the reference line A2 representing the longitudinal direction of the magazine 29. A plurality of stoppers 31 are housed in the supply path 30 in a state of being connected to each other by a connecting element. It is assumed that the stopper 31 is a shaft-shaped nail. The connecting element may be either a wire or an adhesive.

The magazine 29 has a guide rail 32 provided along the reference line A2, a feeder 33 movable along the guide rail 32, and an elastic member 34 for urging the feeder 33. The elastic member 34 urges the feeder 33 in parallel with the reference line A2 and in a direction approaching the injection portion 25. The feeder 33 has a slider 62 and a contact 63 attached to the slider 62. The contactor 63 is arranged between the injection path 26 and the slider 62 in the reference line A2 direction. When the driving machine 10 is viewed from the side as shown in FIG. 1, the center line A1 and the reference line A2 intersect. The driving machine 10 shown in FIG. 1 is an example in which the angle formed between the center line A1 and the reference line A2 is not 90 degrees.

The elastic member 34 shown in FIG. 5 is an example in which a metal spiral spring is used. A spiral spring is attached to the slider 62, and the end of the spiral spring is connected to the magazine 29. The contactor 63 is pressed against the stopper 31 at the position farthest from the injection portion 25 among the plurality of stoppers 31 arranged in the supply path 30. The feeder 33 sends the stopper 31 to the injection path 26 by the urging force of the elastic member 34.

As shown in FIG. 2, the electric motor 35 is arranged in the motor case 13. The electric motor 335 has a stator 36 fixed to the motor case 13 and a rotor 37 rotatably arranged in the motor case 13. The stator 36 has a steel plate and an energizing coil wound around the steel plate. The rotor 37 has a rotor core and a permanent magnet attached to the rotor core. The rotor 37 is fixed to the rotating shaft 38. A bearing 39 is provided in the motor case 13, and the bearing 39 rotatably supports the rotating shaft 38. The electric motor 35 is, for example, a three-phase AC type brushless motor, and the energizing coil includes three types of energizing coils corresponding to the U phase, the V phase, and the W phase. The rotation state detection sensor 70 shown in FIG. 11 is provided in the motor case 13. The rotation state detection sensor 70 detects the rotation speed and the position in the rotation direction of the rotor 37.

The speed reducer 40 and the conversion mechanism 41 are provided in the motor case 13. The speed reducer 40 is a mechanism for transmitting the rotational force of the rotating shaft 38 to the drive shaft 42. The speed reducer 40 has a plurality of planetary gear mechanisms, the input element of the speed reducer 40 is connected to the rotating shaft 38, and the output element of the speed reducer 40 is connected to the drive shaft 42. A bearing 64 is provided in the motor case 13, and the bearing 64 rotatably supports the drive shaft 42.

The reduction ratio of the speed reducer 40 is constant. The speed reducer 40 transmits the rotational force by setting the rotational speed of the drive shaft 42 to be lower than the rotational speed of the rotary shaft 38. When the rotational force of the electric motor 35 is transmitted to the drive shaft 42 via the speed reducer 40, the rotation direction of the drive shaft 42 is forward rotation. The conversion mechanism 41 is a mechanism that converts the rotational force into the moving force of the driver blade 18.

As shown in FIG. 4, the wheel 43 has a plurality of pinion pins 44. The plurality of pinion pins 44 are arranged at intervals from each other along the rotation direction centered on the center line A3. The plurality of pinion pins 44 can be independently engaged with and disengaged from each of the convex portions 28 of the driver blade 18 as the wheel 43 rotates. The plurality of pinion pins 44 and the plurality of protrusions 28 form a rack and pinion mechanism. The conversion mechanism 41 includes a plurality of pinion pins 44 and a plurality of convex portions 28. The conversion mechanism 41 includes a plurality of pinion pins 44 and a plurality of convex portions 28.

The position detection sensor 71 shown in FIG. 11 is provided in the motor case 13. The position detection sensor 71 detects the position of the wheel 43 in the rotation direction and outputs a signal. A rotation regulation mechanism 45 is provided in the motor case 13. The rotation regulation mechanism 45 allows the drive shaft 42 and the wheel 43 to rotate by the rotational force transmitted from the speed reducer 40. The rotation regulation mechanism 45 prevents the wheel 43 and the drive shaft 42 from rotating when a rotational force is applied to the wheel 43 by the force of the driver blade 18.

As shown in FIG. 1, a battery 46 that can be attached to and detached from the mounting portion 15 is provided. The battery 46 is a DC power source having a storage case, a battery cell housed in the storage case, and a terminal provided in the storage case. Battery cells include lithium ion batteries, nickel metal hydride batteries, lithium ion polymer batteries and nickel cadmium batteries. A battery cell is a secondary battery capable of repeating charging and discharging.

A trigger 47 is provided on the handle 14. The trigger 47 is a lever provided so as to be movable with respect to the handle. The operator can perform the On / Off operation of the trigger 47 while holding the handle 14 by hand. On of the trigger 47 is to apply an operating force, and Off of the trigger 47 is to release the operating force. A trigger switch 68 shown in FIG. 11 is provided inside the handle 14. When the operator applies an operating force to the trigger 47, the trigger switch 68 is turned on, and when the operating force is released, the trigger switch 68 is turned off.

The control unit 48 is provided in the mounting unit 15. The control unit 48 includes the microcomputer 66 and the inverter circuit 67 shown in FIG. The microcomputer 66 has an input / output interface, a central arithmetic processing unit, and a storage unit. The inverter circuit 67 is connected to the stator 36 of the electric motor 35 and has a plurality of switching elements. Each of the plurality of switching elements can be switched on and off.

The control unit 48 detects the signal of the trigger switch 68, the signal of the push lever switch 69, the signal of the rotation state detection sensor 70, and the signal of the position detection sensor 71. The control unit 48 processes various signals to control the inverter circuit 67, and switches between rotation and stop of the electric motor 35. The moving mechanism 65 is composed of the conversion mechanism 41 shown in FIG. 1, the control unit 48, and the electric motor 35 shown in FIG.

Next, an example of using the driving machine 10 will be described. When the control unit 48 detects at least one of the off of the trigger switch 68 and the off of the push lever switch 69, the control unit 48 turns off the switching element of the inverter circuit 67. Therefore, the electric power of the battery 46 is not supplied to the electric motor 35, and the electric motor 35 is stopped. The pressure in the pressure chamber 21 is applied to the piston 17, and the piston 17 and the driver blade 18 are urged in the center line A1 direction. The pinion pin 44 and the convex portion 28 are engaged with each other.

The urging force received by the driver blade 18 is transmitted to the wheel 43, and the wheel 43 receives the rotational force in the clockwise direction in FIG. The rotation regulation mechanism 45 prevents the wheel 43 from rotating due to the force applied from the driver blade 18, and the piston 17 and the driver blade 18 are stopped at the standby position. The standby position of the piston 17 is between the top dead center and the bottom dead center of the piston 17. The top dead center of the piston 17 is the position farthest from the bumper 23 in the center line A1 direction. The bottom dead center of the piston 17 is a position in contact with the bumper 23 in the center line A1 direction.

When the piston 17 is stopped at the standby position, as shown in FIG. 6A, the tip 49 of the driver blade 18 includes the rear end 50 and the tip 51 of the stopper 31 closest to the injection path 26 among the plurality of stops 31. Located between. The rear end 50 is the rear end in the shooting direction with respect to the driven material W1, and the tip 51 is the tip in the shooting direction with respect to the driven material W1. The feeder 33 urges a plurality of stoppers 31 by the force of the elastic member 34, and the stopper 31 closest to the injection path 26 among the plurality of nail stoppers 31 is pressed against the driver blade 18.

When the control unit 48 detects that the trigger switch 68 is turned on and the push lever switch 69 is turned on, the control unit 48 controls the inverter circuit to supply the electric power of the battery 46 to the electric motor 35. The rotational force of the electric motor 35 is transmitted to the drive shaft 42 via the speed reducer 40. The drive shaft 42 and the wheel 43 rotate counterclockwise in FIG.

The rotational force of the wheel 43 is transmitted to the driver blade 18, and the piston 17 moves in the second direction D2 in FIG. The movement of the piston 17 in the second direction D2 in FIG. 1 is called ascending. When the piston 17 rises, the pressure in the pressure chamber 21 rises.

After the piston 17 reaches top dead center, all pinion pins 44 are released from the protrusion 28, as shown in FIG. The piston 17 moves in the first direction toward the bumper 23 under the pressure of the pressure chamber 21. The movement of the piston 17 in the first direction D1 in FIG. 1 is called descent. The second direction D2 is opposite to the first direction D1. The driver blade 18 hits one stopper 31 sent to the injection path 26, and the stopper 31 is driven into the material to be driven W1.

Further, the piston 17 collides with the bumper 23 after the stopper 31 is driven into the driven material W1. The bumper 23 is elastically deformed by receiving a compressive load in the center line A1 direction, and the bumper 23 absorbs the kinetic energy of the piston 17 and the driver blade 18. Further, the control unit 48 rotates the electric motor 35 even after the driver blade 18 hits the stopper 31. The pinion pin 44 engages the convex portion 28, and the piston 17 moves from the bottom dead center to the top dead center. When the piston 17 reaches the standby position, the control unit 48 stops the electric motor 35. The control unit 48 processes the signal of the position detection sensor 71 and estimates that the piston 17 has reached the standby position.

After that, when the above operations, operations, and controls are performed and the fasteners 31 housed in the magazine 29 are sequentially driven into the material W1 to be driven, the number of the stoppers 31 housed in the magazine 29 decreases. .. The number of fasteners 31 housed in the magazine 29 is described as the remaining number of fasteners 31. The driving machine 10 of the present disclosure has a remaining number notification mechanism B1 that notifies the operator of the remaining number of the stoppers 31 when the remaining number is less than a preset predetermined number.

The remaining number notification mechanism B1 will be described. The push lever 27 has an engaging portion 53. The engaging portion 53 projects from the push lever 27 toward the magazine 29. A stopper 54 and an intermediate member 55 are provided in the magazine 29. The stopper 54 and the intermediate member 55 can move with respect to the magazine 29 in the reference line A2 direction within a predetermined range. Further, the intermediate member 55 can move in the direction of the reference line A2 with respect to the stopper 54. The stopper 54 and the intermediate member 55 are made of a material that is not easily plastically deformed by a load in the reference line A2 direction, for example, a metal or a hard resin.

An elastic member 56 that urges the intermediate member 55 in the reference line A2 direction is provided. The elastic member 56 urges the intermediate member 55 in a direction away from the injection path 26. 6A and 12 show an example in which the elastic member 56 is arranged between the intermediate member 55 and the receiving portion 72 provided in the magazine 29. As the elastic member 56, a metal compression spring can be used. A regulation unit 57 is provided in the magazine 29, and the movement range of the stopper 54 is regulated by the regulation unit 57. The regulating portion 57 may be either a wall or a protrusion with which the stopper 54 can be contacted and separated. The regulating unit 57 has a function as a stopper.

Further, an elastic member 58 is provided between the stopper 54 and the intermediate member 55. The elastic member 58 is a metal compression spring. The first end of the elastic member 58 is pressed against the stopper 54, and the second end of the elastic member 58 is pressed against the intermediate member 55. As shown in FIG. 7A, the stopper 54 is provided with the engaging portion 59, and the intermediate member 55 is provided with the engaging portion 60. The stopper 54 is urged against the elastic member 58, and the engaging portion 59 is pressed against the engaging portion 60. That is, the urging force of the elastic member 56 is indirectly transmitted to the stopper 54 via the intermediate member 55.

The remaining number notification mechanism B1 is composed of a stopper 54, an intermediate member 55, elastic members 34, 56, 58, an engaging portion 53, and the like. The spring constant of the elastic member 34 is larger than the spring constants of the elastic members 56 and 58, respectively.

In the driving machine 10 of the present disclosure, when the remaining number of the stoppers 31 is equal to or more than a preset predetermined number, the feeder 33 is separated from the intermediate member 55 as shown in FIG. 7A. The intermediate member 55 is urged by the elastic member 56 in a direction away from the injection path 26, and the stopper 54 is pressed against the regulating portion 57 to stop. When the stopper 54 is pressed against the regulating portion 57, the engaging portion 61 of the stopper 54 is located outside the moving range of the engaging portion 53. Therefore, when the push lever 27 is pressed against the material to be driven W1, the stopper 54 does not hinder the movement of the push lever 27, and the push lever switch 69 is turned on.

On the other hand, as the remaining number of the fasteners 31 decreases, the feeder 33 approaches the injection path 26 by the urging force of the elastic member 34. Then, when the remaining number of the fasteners 31 is less than a predetermined number set in advance while the push lever 27 is separated from the material to be driven W1, the feeder 33 is pressed against the intermediate member 55.

Then, the intermediate member 55 approaches the injection path 26 against the urging force of the elastic member 56. The moving force of the intermediate member 55 is transmitted to the stopper 54 via the elastic member 58. Then, as shown in FIG. 7B, the engaging portion 61 of the stopper 54 enters the moving range of the engaging portion 53. In this state, when the operator presses the push lever 27 against the driven material W1, the engaging portion 61 engages with the engaging portion 53 and the stopper 54 hinders the movement of the push lever 27 as shown in FIG. 6B. To do.

Therefore, the movement of the push lever 27 is hindered and the push lever switch 69 is kept off. That is, the electric motor 35 is maintained in the stopped state, and the stopper 31 is not driven. Therefore, the operator can recognize that the remaining number of the stoppers 31 is less than the preset predetermined number.

Next, the operation and control when the remaining number of the stoppers 31 becomes less than a preset predetermined number in a state where the push lever 27 is pressed against the driven material W1 will be described. For example, when the operator maintains the state in which the push lever 27 is pressed against the driven material W1 and the trigger switch 68 is alternately turned on and off, the stopper 31 sequentially moves the driven material. It is driven into W1 and the remaining number of stops 31 is reduced. When the remaining number of the fasteners 31 is a predetermined number or more, the feeder 33 is separated from the intermediate member 55 as shown in FIG. 8A. Further, the urging force of the elastic member 56 is transmitted to the stopper 54 via the intermediate member 55, and the stopper 54 is pressed against the regulating portion 57 to stop. Further, the engaging portion 61 of the stopper 54 is separated from the engaging portion 53.

When the number of the stoppers 31 is less than the predetermined value due to repeated driving of the stoppers 31, the feeder 33 is pressed against the intermediate member 55 as shown in FIGS. 8B and 9A, and the intermediate member 55 is the elastic member 56. It approaches the injection path 26 against the urging force. The moving force of the intermediate member 55 is transmitted to the stopper 54 via the elastic member 58, and the stopper 54 approaches the injection path 26. Therefore, the engaging portion 61 of the stopper 54 is pressed against the engaging portion 53, and the stopper 54 stops.

When the trigger switch 68 is switched from off to on and the electric motor 35 is rotated while the push lever switch 69 is on, the driver blade 18 is raised as shown in FIG. 9B.

When the driver blade 18 rises, as shown in FIG. 10A, the feeder 33 approaches the injection path 26 by the urging force of the elastic member 34, and the stopper 31 located at the head in the feed direction of the stopper 31 feeds to the injection path 26. Be done. Further, the driver blade 18 descends and hits the stopper 31 of the injection path 26, and the stopper 31 is driven into the material to be driven W1 as shown in FIG. 10B.

After that, when the push lever 27 is pressed against the material to be driven W1 and the trigger switch 68 is repeatedly turned on and off, the feeder 33 approaches the injection path 26 with the stopper 54 stopped. Further, the driver blade 18 repeatedly rises and falls, and the stopper 31 sent from the magazine 29 to the injection path 26 is sequentially driven into the material to be driven W1.

The driving machine 10 of the present disclosure can obtain both the following first and second functions.

The first function is that when the remaining number of the stoppers 31 is less than a predetermined number and the push lever 27 is separated from the driven material W1, the engaging portion 61 of the stopper 54 is disengaged as shown in FIGS. 6A and 7B. , It is located in the moving region of the engaging portion 53. Therefore, even if the push lever 27 is pressed against the material to be driven W1, the engaging portion 61 engages with the engaging portion 53 as shown in FIG. 6B, the push lever 27 does not move, and the push lever switch 69 is kept off. Therefore, the electric motor 35 is maintained in the stopped state and the stopper 31 is not driven. When the remaining number of the stopper 31 is a predetermined number including zero, it is possible to prevent a blank shot in order to suppress the driving operation. Then, the operator can recognize that the stopper 31 needs to be replenished.

The second function is when the stopper 31 is driven in a state where the push lever 27 is pressed against the material W1 to be driven, and the remaining number of the stoppers 31 reaches a predetermined number that needs to be replenished. , The stopper 31 in the magazine 29 is sent to the injection path 26. Therefore, the operation of sending the stopper 31 housed in the magazine 29 to the injection path 26 can be smoothly performed. Further, the driver blade 18 can hit the stopper 31 sent to the injection path 26.

Another example of the remaining number notification mechanism B1 shown in FIGS. 5 and 6A is shown in FIG. 13A. An elastic member 73 is provided to urge the stopper 54 in a direction away from the injection path 26. FIG. 13A shows an example in which the elastic member 73 is arranged between the engaging portion 59 of the stopper 54 and the magazine 29. The elastic member 73 is a metal compression spring. The elastic member 73 directly urges the stopper 54. An elastic member 74 is provided between the intermediate member 55 and the feeder 33. A metal compression spring is suitable for the elastic member 74. The elastic member 74 urges the intermediate member 55 in a direction approaching the injection path 26. The elastic member 74 may be integrated with the intermediate member 55, and may be another elastic material such as a resin as long as it has a structure having elastic force.

When the remaining number of the stoppers 31 of the driving machine 10 is equal to or more than a preset predetermined number, the intermediate member 55 is separated from the engaging portion 59 as shown in FIG. 13A. The stopper 54 is pressed against the regulating portion 57 and is stopped. When the stopper 54 is pressed against the regulating portion 57, the engaging portion 61 of the stopper 54 is located outside the moving range of the engaging portion 53. Therefore, when the push lever 27 shown in FIG. 1 is pressed against the driven material W1, the stopper 54 does not hinder the movement of the push lever 27, and the push lever switch 69 shown in FIG. 11 is turned on.

On the other hand, as the remaining number of the fasteners 31 decreases, the feeder 33 approaches the injection path 26 by the urging force of the elastic member 34. Then, when the push lever 27 shown in FIG. 1 is separated from the driven material W1 and the remaining number of the fasteners 31 is less than a preset predetermined number, the intermediate member 55 is pressed against the engaging portion 59. ..

Then, the stopper 54 approaches the injection path 26 against the urging force of the elastic member 73. Then, as shown in FIG. 13B, the engaging portion 61 of the stopper 54 enters the moving range of the engaging portion 53. In this state, when the operator presses the push lever 27 against the driven material W1, the engaging portion 61 engages with the engaging portion 53, and the stopper 54 hinders the movement of the push lever 27.

Therefore, the movement of the push lever 27 is hindered and the push lever switch 69 is kept off. That is, the electric motor 35 is maintained in the stopped state, and the stopper 31 is not driven. Therefore, the operator can recognize that the remaining number of the fasteners 31 is less than the preset predetermined number.

Next, when the push lever 27 shown in FIG. 1 is pressed against the driven material W1 and the remaining number of the fasteners 31 is less than a preset predetermined number, the remaining number shown in FIG. 13A. The operation of the notification mechanism B1 will be described. When the remaining number of the fasteners 31 is a predetermined number or more, the intermediate member 55 is separated from the engaging portion 59 as shown in FIG. 14A. Further, the stopper 54 is pressed against the regulating portion 57 by the urging force of the elastic member 74 and is stopped. Further, the engaging portion 61 of the stopper 54 is separated from the engaging portion 53.

When the number of the stoppers 31 is less than a predetermined value due to repeated driving of the stoppers 31, the intermediate member 55 is pressed against the engaging portion 59, and the stopper 54 opposes the urging force of the elastic member 73 to the injection path. Approaching 26. Therefore, as shown in FIG. 14B, the engaging portion 61 of the stopper 54 is pressed against the engaging portion 53, and the stopper 54 stops.

When the trigger switch 68 is switched from off to on and the electric motor 35 is rotated while the push lever switch 69 shown in FIG. 11 is on, the driver blade 18 is raised. When the driver blade 18 rises, the feeder 33 approaches the injection path 26 by the urging force of the elastic member 34, and the stopper 31 located at the head in the feed direction of the stopper 31 is fed to the injection path 26. Then, the driver blade 18 descends and hits the stopper 31 of the injection path 26, and the stopper 31 is driven into the material to be driven W1. The driving machine 10 provided with the remaining number notification mechanism B1 shown in FIG. 13A can also obtain both the first function and the second function described above.

The meanings of the elements of this disclosure are as follows. The stopper 31 is a stopper, the push lever 27 is a pressing member, and the elastic member 34 is an urging member. The intermediate member 55 and the elastic member 58 are moving force transmitting members. The tip 49 of the driver blade 18 is the tip of the striking portion. The rotation regulation mechanism 45 is a holding mechanism. The trigger 47 is an operating member, and the wheel 43 is a rotating element. Further, the elastic members 56 and 73 are pressing members. The elastic member 34 can be grasped as a first urging member, and the elastic members 56 and 73 can be grasped as a second urging member.

The driving machine is not limited to the disclosed embodiment, and can be variously changed without departing from the gist thereof. For example, the moving mechanism that moves the striking portion by the pressure of gas may be an air tool of a type that supplies compressed air from the outside. Further, in the air spring system in which the closed space is filled with gas, a stretchable bellows and a pressure chamber formed in the bellows may be provided. The bellows can be expanded and contracted in the center line direction, and a striking portion is attached to the end of the bellows in the expansion and contraction direction. Further, the moving mechanism includes a mechanism for moving the striking portion by the pressure of gas and a mechanism for moving the striking portion by the elastic force of the elastic member. Here, the elastic member includes a metal compression spring. Further, the striking portion and the stopper may be moved by bringing the striking portion into contact with the launching structure that performs rotational movement at high speed.

As the moving mechanism for moving the striking portion, a cam mechanism or a winch mechanism can be used in addition to the rack and pinion mechanism. The cam mechanism has a cam plate that is rotated by the rotational force of the motor and a contact that comes into contact with the cam surface of the cam plate. The winch mechanism has a rotating element to which the rotational force of the motor is transmitted, and a cable connecting the rotating element and the striking portion. Rotating elements include gears, sprockets, pulleys, shafts.

The control unit includes a processor, a unit, and a module in addition to the microcomputer. The control unit includes one composed of an electric component or an electronic component alone, and one composed of a plurality of electric components or a plurality of electronic components. The control unit processes signals, information, and data.

The predetermined number of fasteners held by the magazine may be "1" or more. As the elastic member that urges the element such as the feeder, the intermediate member, and the stopper, a spring or synthetic rubber can be used according to the direction in which the element is urged. As the spring, a compression spring or a tension spring can be used depending on the direction in which the element is urged and the position of the spring. The shape and structure of the spring may be any of a coil spring, a spiral spring, a torsion spring, and a leaf spring. As the material of these springs, metal or synthetic resin can be used.

The elastic member 56 shown in FIG. 7A can also be arranged between the injection portion 25 and the engaging portion 60. That is, the position of the elastic member 56 may be any position as long as the intermediate member 55 is urged away from the injection portion 25.

The elastic member 73 shown in FIG. 13A can also be arranged between the injection portion 25 and the engaging portion 60. That is, the position of the elastic member 73 may be any position as long as the stopper 54 is urged away from the injection portion 25.

The motor may be an electric motor, a hydraulic motor, or a pneumatic motor. The power source of the electric motor may be either a DC power source or an AC power source. In the embodiment of the driving machine, the positional relationship between the cylinder 16 and the magazine 29 is designed so that the angle formed between the center line A1 and the reference line A2 shown in FIG. 1 is 90 degrees. including.

The operating member is an element operated by an operator's finger, and the operating member includes buttons, levers, and switches that are movably provided with respect to the housing. Further, the operation member includes a piezoelectric element and an operation panel which are provided so as not to be movable with respect to the housing and can detect the application and release of the operation force pressed by the operator with a finger. The intermediate member is an element that transmits the moving force of the feeder to the stopper, and the intermediate member may be any of an arm, a rod, a plunger, a lever, and a link. The stopper may be either a shaft-shaped nail or a U-shaped metal piece. Further, the stopper is not limited to a T-shaped nail having a flat surface portion on the nail head, and may be an I-shaped pin nail having no flat surface nail.

10 ... driving machine, 11 ... housing, 18 ... driver blade, 19 ... striking part, 21 ... pressure chamber, 25 ... injection part, 27 ... push lever, 29 ... magazine, 31 ... stopper, 33 ... feeder, 34, 58 ... Elastic member, 35 ... Electric motor, 41 ... Conversion mechanism, 43 ... Wheel, 45 ... Rotation regulation mechanism, 47 ... Trigger, 49, 51 ... Tip, 50 ... Rear end, 54 ... Stopper, 55 ... Intermediate member, 65 ... movement mechanism, D1 ... first direction, D2 ... second direction.

Claims (6)

A driving portion including a magazine for holding the stopper, an injection portion to which the stopper is sent from the magazine, and a striking portion for striking the stopper sent to the injection portion to strike the material to be driven. It ’s a machine,
A pressing member provided on the injection portion and moving with respect to the injection portion when pressed against the material to be driven.
A feeder provided in the magazine and moving in a direction approaching the injection portion to send the stopper to the injection portion.
A stopper that is movably provided with respect to the magazine in a direction approaching the injection portion and that can be engaged and disengaged from the pressing member.
An urging member that urges the feeder in a direction that brings it closer to the injection portion,
A moving force transmitting member that transmits the moving force of the feeder to the stopper,
Have,
When the number of the stoppers held by the magazine is equal to or greater than a predetermined number, the stopper is released from the pressing member to allow the pressing member to move.
When the number of the stoppers held by the magazine is less than a predetermined number, the stopper engages with the pressing member to prevent the pressing member from moving.
The feeder sends the stopper to the injection portion when the pressing member is pressed against the driven material and the stopper comes into contact with the pressing member to hinder the movement of the stopper. ,
The moving force transmitting member does not transmit the moving force of the feeder to the stopper when the number of the stoppers held by the magazine is a predetermined number or more.
The moving force transmission member, the number of the fastener in which the magazine is held by you transmit moving force of the feeder is less than the predetermined number in the stopper, driving machine. A pressure chamber in which the striking portion is moved in the first direction by the pressure of gas and the striking portion strikes the stopper.
When the pressing member is pressed against the material to be driven and moves, the striking portion is moved in a second direction opposite to the first direction to increase the pressure in the pressure chamber.
A holding mechanism that stops the striking portion against the pressure of the pressure chamber before moving the striking portion in the second direction and positions the tip of the striking portion between the tip and the rear end of the stopper. ,
Is provided, the driving machine of claim 1, wherein. A housing that movably supports the striking portion and
An operating member attached to the housing and operated by an operator,
Is provided,
The moving mechanism
With the motor
A rotating element that rotates with the rotational force of the motor,
A conversion mechanism that converts the rotational force of the rotating element into the moving force of the striking portion in the second direction, and
A control unit that rotates the motor when the operating member is operated and the pressing member moves with respect to the injection unit.
2. The driving machine according to claim 2 . A pressing member for urging the stopper in a direction away from the injection portion is provided.
When the number of the stoppers held by the magazine is equal to or greater than a predetermined number, the pressing member releases the stopper from the pressing member.
The driving machine according to any one of claims 1 to 3 , wherein the pressing member engages the stopper with the pressing member when the number of the stoppers held by the magazine is less than a predetermined number. The driving machine according to claim 4 , wherein the pressing member indirectly urges the stopper via the moving force transmitting member. The driving machine according to claim 4 , wherein the pressing member directly urges the stopper.

Images