Patent Grant
11590638
The present invention relates to a driver which drives a fastener into a driven member.
A driver which drives a fastener into a driven member has been described in Patent Document 1. The driver described in Patent Document 1 includes a housing, a cylindrical guide member provided in the housing, a bumper provided in the housing, a bellows disposed in the housing, and a piston as an operation member which is operable along the guide member. A first end part of the guide member in a center axis direction is connected to the housing. The bellows is extendable, a first end part of the bellows is connected to the piston, and a second end part of the bellows is fixed to the housing. When compressed air is enclosed in the bellows, a compression chamber is formed.
The housing includes a wall part, and a bumper is supported by the wall part. The wall part is extended to a radial direction of the guide member, and the wall part is connected to a second end part of the guide member in the center axis direction. To the piston, a driver blade is fixed as an impactor. An ejection part is provided outside the housing, and the ejection part is fixed to a partition wall. An ejection path is provided to the ejection part. A magazine is attached to the ejection part, and a fastener housed in the magazine is supplied to the ejection path.
Furthermore, the driver described in Patent Document 1 has a motor provided in the housing, a gear which transmits a torque of the motor to a cam, a protrusion provided to the cam, an engagement part provided to the piston, and the bumper provided in the housing. Still further, the driver described in Patent Document 1 has a push rod which is movable with respect to the housing and a trigger which is operated by an operator.
When the motor stops, the piston is pushed against the bumper by a pressure of the compression chamber to stop at a bottom dead point. When the trigger is operated while the push rod is pushed against the driven member, the cam is rotated by the torque of the motor to mesh the protrusion with the engagement part, and the piston is moved from the bottom dead point toward a top dead point by a torque of the cam. While the piston is moving from the bottom dead point toward the top dead point, the bellows is compressed to increase the pressure of the compression chamber.
When the piston reaches the top dead point, the protrusion is away from the engagement part so that the torque of the cam is not transmitted to the piston. Thus, the piston is moved from the top dead point toward the bottom dead point by the pressure of the compression chamber. As a result, the driver blade impacts the fastener positioned in the ejection path to drive the fastener into the driven member. Next, when the piston collides with the bumper, the bumper reduces and attenuates an impact load. Furthermore, the motor stops after the driver blade drives the fastener into the driven member, and the piston stops in a state of being in contact with the bumper.
Patent Document 1: Japanese Patent Application Laid-open Publication No. 2014-69289
However, the driver described in Patent Document 1 has no description about a case in which the fastener is clogged in the ejection part, and has a room for improvement in this viewpoint.
An object of the present invention is to provide a driver capable of handling a case with clogging of the fastener in the ejection part.
The invention according to one embodiment is directed to a driver including: an ejection part to which a fastener is supplied; an impactor which moves from a first position toward a second position and drives the fastener into a driven member; and a rack provided to the impactor, the driver has a rotary component engaging with the rack and moving the impactor from the second position to the first position and an engagement member engaging with the rack, the impactor moves from the second position to the first position while the rotary component rotates once, the rotary component is released from engaging with the rack after the impactor moves from the second position to the first position, and moves from the first position to the second position, and the engagement member is engageable with the rack when the impactor stops before reaching the second position from the first position.
The invention according to one embodiment can prevent operation of the impactor in a case in which the fastener is clogged in the ejection part so as to handle the case.
Hereinafter, embodiments of a driver will be described in detail based on the drawings. In each of the drawings, the common members are denoted with the same reference symbol.
A driver 10 shown in
A cylindrically-shaped cylinder 16 is provided in the cylinder case 12. A holder 17 is provided in the cylinder case 12, and the cylinder 16 is positioned by the holder 17 in the radial direction. Also, a piston 18 is movably disposed in the cylinder 16. The operating direction of the piston 18 is a center line B1 direction of the cylinder 16.
A pressure accumulation container 19 is provided in the cylinder case 12, the pressure accumulation container 19 and the cylinder 16 are coupled to each other by a coupling member 20. The coupling member 20 is annular, and a pneumatic chamber 21 is formed from the inside of the pressure accumulation container 19 to the inside of the cylinder 16. A seal member 22 is attached to an outer peripheral surface of the piston 18, and the seal member 22 seals the pneumatic chamber 21 so as to be airtight. A driver blade 23 is attached to the piston 18.
A holder 24 is provided in the housing 11, and the cylinder 16 is supported by the holder 24 in the center line B1 direction. The holder 24 is disposed at a location opposite to a location where the pressure accumulation container 19 is disposed in the center line B1 direction of the cylinder 16. The holder 24 supports a bumper 25, and the bumper 25 is integrally formed of a rubber-like elastic body. A shaft hole 24a is provided in the holder 24, and a guide hole 26 is provided in the bumper 25. The driver blade 23 is movable in the shaft hole 24a and the guide hole 26 in the center line B1 direction. The present embodiment exemplifies a structure in which the center line B1 passes through the center of the driver blade 23 in a plane crossing the center line B1. When the piston 18 operates to cause the driver blade 23 or the piston 18 to collide with the bumper 25, the bumper 25 attenuates or reduces the impact load.
An ejection part 27 is attached to the holder 24. The ejection part 27 is disposed so as to be in line with the holder 24 in the center line B1 direction. The ejection part 27 is disposed from the inside of the housing 11 to the outside of the housing 11. The ejection part 27 has a blade guide 28 and a cover 30 fixed to the blade guide 28. The cover 30 is fixed to the blade guide 28 by using a screw member 29. An ejection path 31 is formed between the blade guide 28 and the cover 30. The ejection path 31 is a guide hole disposed along the center line B1 direction. The driver blade 23 can reciprocate inside the ejection path 31 in the center line B1 direction. In
A push rod 32 is attached to the blade guide 28. The push rod 32 is disposed outside the housing 11. The push rod 32 has a slide hole 32b, and a screw member 121 inserted into the slide hole 32b is fastened and fixed to the cover 30. The push rod 32 is movable with respect to the cover 30 in the center line B1 direction. A distal end 32a of the push rod 32 is pushed against a driven member W1. An ejection port 31a is provided at a location of the ejection path 31, the location being the closest to the distal end 32a.
As shown in
An accommodation part 37 continuing to the cylinder case 12 and the motor case 13 is provided. That is, the accommodation part 37 configures a part of the housing 11. Explanation will be made about a structure of a motive power mechanism 76 which operates the driver blade 23 in a direction of approaching the pneumatic chamber 21 so as to be against the force of the pneumatic chamber 21. A rotary component 38 is provided in the accommodation part 37. The rotary component 38 is a component which operates the piston 18 in a direction of approaching the pneumatic chamber 21. The rotary component 38 is fixed to a drive shaft 39, and the drive shaft 39 is supported by two bearings 40 so as to be rotatable about a center line B2.
The center line B2 is disposed so as to cross the center line B1 in a side view of the driver 10 shown in
On the other hand, a rack 42 is provided on a side edge of the driver blade 23 along the center line B1 direction. The rack 42 is formed by convex parts 42a and concave parts 42b which are alternately disposed in the center line B1 direction so as to have a certain space therebetween, and the pinions 41 can engage with and disengage from the rack 42. The rotary component 38, the pinions 41, and the rack 42 configure the motive power mechanism 76. The plurality of convex parts 42 are a plurality of teeth.
An electric motor 43 which rotates the rotary component 38 is provided. The electric motor 43 is provided in the motor case 13. The electric motor 43 has a stator 44 fixed to the motor case 13 and a rotor 45 rotatably provided in the motor case 13. A planetary-gear-type decelerator 46 is provided in the motor case 13, and an input shaft of the decelerator 46 is coupled to the rotor 45. An output shaft of the decelerator 46 is coupled to the drive shaft 39.
A battery 47 is attached to the attachment part 15. The battery 47 is detachable to the attachment part 15, and the battery 47 supplies electric power to the electric motor 43. The battery 47 has an accommodation case and a plurality of battery cells accommodated in the accommodation case. The battery cells are secondary batteries formed of lithium ion batteries, nickel metal hydride batteries, lithium ion polymer batteries, nickel cadmium batteries, or others.
A magazine 49 which accommodates a plurality of fasteners 48 is provided, and the magazine 49 is fixed to the housing 11 and the blade guide 28. A fixing component which fixes the magazine 49 is a screw member. A feed mechanism is provided to the magazine 49, and supplies the fasteners 48 accommodated in the magazine 49 to the ejection path. The fasteners 48 are shaft-shaped nails.
A push sensor 50 and a rotation angle sensor 51 are provided to the ejection part 27. The push sensor 50 detects whether the distal end 32a of the push rod 32 is pushed against the driven member W1, and outputs a signal. The rotation angle sensor 51 detects a rotation angle of the rotary component 38, and outputs a signal. A trigger 52 is provided to the handle 14, and a trigger switch 53 which detects whether an operation force is applied to the trigger 52 is provided thereto.
A control substrate 54 is provided in the attachment part 15, and a controller and an inverter circuit are provided to the control substrate 54. The inverter circuit is connected to the stator 44 of the electric motor 43, and has a switching element. The controller processes the signals which are output from the push sensor 50, the rotation angle sensor 51, and the trigger switch 53 to control the inverter circuit. That is, the controller controls rotation, stop, and a rotation speed of the electric motor 43.
Next, an example of control of the driver 10 is described. When the push rod 32 is away from the driven member W1 and the operation force of the trigger 52 is released as shown in
When detecting that the push rod 32 is pressed against the driven member W1 and the operation force is applied to the trigger 52, the controller rotates the electric motor 43. The torque of the electric motor 43 is transmitted via the decelerator 46 to the rotary component 38. When the rotary component 38 rotates in a counterclockwise direction in
After the driver blade 23 ascends by the torque of the electric motor 43 so that the driver blade 23 reaches the top dead point, the pinions 41 are away from the rack 42. In this manner, after the driver blade 23 reaches the top dead point during one rotation of the rotary component 38, the pinions 41 are away from the rack 42. Then, the driver blade 23 is moved by the air pressure of the pneumatic chamber 21 from the top dead point toward the bottom dead point in the center line B1 direction. And, the driver blade 23 impacts the fastener 48 in the ejection path 31, and the fastener 48 is driven from the ejection port 31a of the ejection path 31 into the driven member W1.
Also, when the driver blade 23 drives the fastener 48 into the driven member W1, the driver blade 23 descends while having excess kinetic energy, the driver blade 23 collides with the bumper 25, and apart of the kinetic energy of the driver blade 23 and the piston 18 is absorbed by the bumper 25. After the driver blade 23 impacts the fastener 48 and before the pinions 41 meshes with the rack 42 again, the controller stops the electric motor 43. The controller determines a timing of the stop of the electric motor 43 from the rotation angle of the rotary component 38.
Each of the piston 18 and the driver blade 23 has a top dead point and a bottom dead point. The top dead point of the piston 18 and the top dead point of the driver blade 23 are different from each other in a position in the center line B1 direction, but are the same as each other in a position which is the closest to the pneumatic chamber 21. The bottom dead point of the piston 18 and the bottom dead point of the driver blade 23 are different from each other in a position in the center line B1 direction, but are the same as each other in a position which is the farthest from the pneumatic chamber 21.
A case in middle of a driving work of the fastener 48 by the operator has a possibility of clogging of the fastener 48 impacted by the driver blade 23 in the ejection path 31 without coming out from the ejection path 31 for some reason, for example, because the driven member W1 is hard or others. In this case, the driver blade 23 stops between the top dead point and the bottom dead point. Thus, the operator performs a work of taking out the fastener 48 from the ejection path 31 while taking the push rod 32 away from the driven member W1 and releasing the operation force on the trigger 52.
The driver 10 of the present embodiment has a fixing mechanism 55 for use in the work of taking out the fastener 48 from the ejection path. The fixing mechanism 55 plays a role of holding the driver blade 23 at a stop position when the driver blade 23 stops between the top dead point and the bottom dead point. The fixing mechanism 55 has a lock plate 56 and a lock lever 57. The lock lever 57 is rotatable about a support shaft 58. A center line B3 of the support shaft 58 is parallel to the center line B2. A cam plate 59 is fixed to the lock lever 57. A protrusion 61 is provided so as to protrude from the surface of the cam plate 59 in the center line B3 direction. A cam surface 60 is formed on the outer periphery of the protrusion 61. The cam surface 60 is non-circular in a plane perpendicular to the center line B3.
Guide rails 62, 63 are provided to the blade guide 28. The guide rails 62, 63 are both linear and parallel to each other in a plan view perpendicular to the center line B3. The guide rails 62, 63 are tilted with respect to the center line B1. The guide rail 62 and the guide rail 63 are disposed so as to be spaced from each other in the center line B1 direction. The guide rail 62 is disposed between the distal end 32a of the push rod 32 and the guide rail 63 in the center line B1 direction.
The lock plate 56 is disposed between the guide rail 62 and the guide rail 63. The lock plate 56 includes contact parts 64, 65 at both ends in the center line B1 direction. The contact parts 64, 65 are both linear and parallel to each other. Also, the contact parts 64, 65 are tilted with respect to the center line B1. The angle and the direction of each of the contact parts 64, 65 tilted with respect to the center line B1 are identical to the angle and the direction of each of the guide rails 62, 63 tilted with respect to the center line B1. The contact parts 64, 65 are parallel to the guide rails 62, 63.
While being in contact with the guide rail 62 or the guide rail 63, the lock plate 56 is movable in a direction opposite to a direction in which the driver blade 23 drives the fastener 48 and diagonally with respect to the center line B1. The direction opposite to the direction in which the driver blade 23 drives the fastener 48 is a direction in which a component of force pushing the driver blade 23 toward the top dead point is caused by the movement of the lock plate 56. This component of force is a vector in the center line B1 direction.
The contact part 64 and the contact part 65 are disposed so as to be spaced from each other in the center line B1 direction. In the center line B1 direction, the space between the guide rail 62 and the guide rail 63 is larger than a distance between the contact part 64 and the contact part 65. The distance between the contact part 64 and the contact part 65 is a width of the lock plate 56 in the center line B1 direction. Thus, the lock plate 56 can move by a predetermined amount in the center line B1 direction while being disposed between the guide rail 62 and the guide rail 63. Also, the lock plate 56 can move along the guide rails 62, 63 in a plane perpendicular to the center line B3 while being disposed between the guide rail 62 and the guide rail 63.
A plurality of pins 66 are provided to the lock plate 56. The pins 66 protrude from the lock plate 56 in the center line B3 direction. The plurality of pins 66 are disposed at a certain pitch in the center line B1 direction. In the center line B1 direction, the pitch between the plurality of pins 66 is equal to a pitch between the plurality of convex parts 42a. The pins 66 are engageable with the rack 42. The fixing mechanism 55 plays a role of keeping the state in which the pins 66 engage with the rack 42. The outer diameter of each pin 66 is smaller than the length of the concave part 42b in the center line B1 direction. Also, a plate 67 is attached to the lock plate 56. The plate 67 is disposed between the lock plate 56 and the cam plate 59.
Furthermore, a pin 68 is provided to the blade guide 28, and a pin 69 is provided to the lock plate 56. Still further, a tension coil spring 70 is provided, a first end of the tension coil spring 70 is coupled to the pin 68, and a second end of the tension coil spring 70 is connected to the pin 69. The tension coil spring 70 is biased in a direction in which the lock plate 56 is away from the driver blade 23.
A fixing pin 71 is provided to the blade guide 28. The fixing pin 71 is pushed by the force of the spring in a direction of protruding from the surface of the blade guide 28. A notch 72 is provided on the outer peripheral surface of the cam plate 59. The fixing pin 71 can enter and exit from the notch 72.
Next, an example of use of the fixing mechanism 55 is described. At the time of the work of driving the fastener 48 by the driver blade 23, the lock lever 57 is held at an initial position as shown in
When the fastener 48 clogs in the ejection path 31, the operator rotates the lock lever 57 counterclockwise from the initial position. By this operation, the lock plate 56 slides in a direction of approaching the center line B1 so as to be against the force of the tension coil spring 70. And, when the lock lever 57 stops as shown in
Furthermore, when the lock plate 56 is at the fixed position as shown in
After removing the fastener 48, the operator causes the fixing pin 71 to exit from the notch 72, and rotates the lock lever 57 clockwise in
Next, with reference to
Here, the lock plate 56 slides so as to cross the center line B1. Thus, the pin 66 positioned first from the bottom enters the concave part 42b formed between the convex part 42a positioned first from the bottom and a convex part 42a positioned second from the bottom.
Furthermore, with reference to
Another example of the lock lever is described with reference to
When the lock lever 73 at the initial position rotates clockwise about the support shaft 74, the cam surface 75 is pressed against the plate 67, so that the lock plate 56 slides in a direction of approaching the center line B1. When the pins 66 engage with the rack 42 to stop the lock lever 73 while the lock plate 56 is sliding, the lock plate 56 stops at the fixed position. When the lock plate 56 stops at the fixed position, the driver blade 23 is prevented from moving in the center line B1 direction.
On the other hand, in a state in which the lock plate 56 is at the fixed position, the lock lever 73 can be rotated counterclockwise in
Here, the meaning of the configuration in the present embodiment is described. The top dead point corresponds to a first position, the bottom dead point corresponds to a second position, and the driver blade 23 corresponds to an impactor. Also, the lock plate 56 corresponds to an engagement member. The center line B1 is a first center line, the guide rail 62 and the guide rail 63 correspond to a first guide rail and a second guide rail, the support shafts 58, 74 correspond to a support shaft, the lock levers 57, 73 correspond to a lever, center lines B3, B4 correspond to a second center line, the blade guide 28 corresponds to a first component member, and the cover 30 corresponds to a second component member. Also, the center line B1 direction is a direction of the operation of the impactor.
A second embodiment of the driver is shown in
A guide hole 79 is provided in the rotary component 38. The guide hole 79 penetrates through the rotary component 38 in the center line B2 direction. The guide hole 79 is disposed at the same position and has the same shape as those of the guide hole 78 in a plan view perpendicular to the center line B2. That is, the guide holes 78, 79 overlap each other in the plan view perpendicular to the center line B2. A pinion 41A of the pinions 41, the pinion being disposed at one end in a circumferential direction, is disposed in the guide holes 78, 79 and is movable in the major axis direction of the guide holes 78, 79. That is, the pinion 41A is movable in a major axis direction of the rotary component 38. A retainer 88 is fixed to the pinion 41A, so that the pinion 41A is not detached from the rotary component 38.
A bias member 80 is attached to the drive shaft 39. The bias member 80 is a component which pushes the pinion 41A outward in the radial direction of the rotary component 38. As the bias member 80, an elastic member such as a metallic torsion coil spring can be used. A first end part 81 of the bias member 80 is fixed to the rotary component 38, and a second end part 82 of the bias member 80 is pressed against the pinion 41A.
Next, a control system of the driver 10 is described with reference to
The inverter circuit 84 configures a circuit which supplies electric power of the battery 47 to the electric motor 43. Furthermore, a phase detection sensor 85 which detects a rotation angle the electric motor 43 and a phase in a rotating direction of the electric motor 43 is provided, and a signal output from the phase detection sensor 85 is input to the controller 83. Furthermore, a current value detection sensor 86 which detects a current value of the electric power supplied from the battery 47 to the electric motor 43 is provided. A signal output from the current value detection sensor 86 is input to the controller 83.
Furthermore, a position detection sensor 87 which detects a position of the driver blade 23 in the center line B1 direction is provided. The position detection sensor 87 is achieved by, for example, detection coils attached to a plurality of locations of the cylinder 16 and a magnet attached to the piston 18. And, the detection coils are energized to detect an electromotive force occurring between the magnet and the detection coils, so that a signal indicative of the position of the driver blade 23 is output. The signal output from the position detection sensor 87 is input to the controller 83. The controller 83 processes the input signals to control the inverter circuit 84, so that the rotation and the stop of the electric motor 43 are controlled. Another configuration of the driver 10 shown in
The driver 10 shown in
Next, an example of the operation and the control of the driver 10 shown in
On the other hand, the controller 83 determines “the clogging of the fastener 48” unless it can detect that the driver blade 23 has reached the bottom dead point within the predetermined time from the moment when the rotary component 38 rotates counterclockwise in
(Case of No Clogging of the Fastener)
When determining that the fastener 48 does not clog, the controller 83 performs normal control. The normal control is control of rotating the electric motor 43 by a predetermined angle for stopping from a moment when the driver blade 23 starts ascending from the bottom dead point. From the load of the electric motor 43, that is, from a signal from the current value detection sensor 86, the controller 83 determines the moment when the driver blade 23 starts ascending by the torque of the electric motor 43. When the controller 83 stops the electric motor 43, the lower end of the driver blade 23 is positioned lower than the upper end of the fastener 48 positioned at the head in the magazine 49. That is, the driver blade 23 stops at the standby position in preparation for the next impact.
(Case of Clogging of the Fastener)
On the other hand, when determining that the fastener 48 clogs in the ejection path 31, the controller 83 allows a first holding control to be performed without performing the normal control.
The first holding control is control of ascending the driver blade 23 which is stopping without reaching the bottom dead point and of stopping it before reaching the top dead point. In specific description, the controller 83 ascends the driver blade 23 by a predetermined amount from the moment when the driver blade 23 starts the ascending to stop the electric motor 43.
The position where the driver blade 23 stops before reaching the bottom dead point because of the clogging of the fastener 48 is obtained by an experiment or simulation. That is, the predetermined amount by which the stopping driver blade 23 is ascended in the first holding control is a movement amount by which the driver blade 23 can stop before reaching the top dead point. When the driver blade 23 moves by the predetermined amount and stops, the lower end of the driver blade 23 is positioned lower than the upper end of the fastener 48 positioned at the head in the magazine 49.
With reference to
Next, with reference to
In this manner, the pinion 41A cannot move on the same circumference, and thus, moves inward in the radial direction inside the guide hole 78 so as to be against the bias force of the bias member 80 as shown in
After the second control is performed to ascend and stop the driver blade 23, the operator removes the clogged fastener 48 from the ejection path 31. After removing the fastener 48 from the ejection path 31, the operator operates the reset switch 89. When the reset switch 89 is operated, the controller 83 performs a first release control or a second release control.
The first release control is control of rotating the electric motor 43 in a second direction and rotating the rotary component 38 clockwise in
By the second release control, the electric motor 43 is rotated in the first direction, and the rotary component 38 is rotated counterclockwise in
Note that the controller 83 operates the stopper 90 while performing the second control to descend the driver blade 23, and thus, the fastener 48 in the magazine 49 is not supplied to the ejection path 31. And, the controller 83 releases the stopper 90 after the driver blade 23 stops. In this manner, when the fastener 48 clogs in the ejection path 31, the controller 83 performs the first holding control example to ascend the driver blade 23 by a predetermined amount and stop it. Therefore, the operator can smoothly perform the work of removing the fastener 48 from the ejection path 31. In the second embodiment of the driver 10, the pneumatic chamber 21 corresponds to an impact component, the electric motor 43 corresponds to a motor, and the pinions 41, particularly the pinion 41A, corresponds to an engagement member.
A third embodiment of the driver is described with reference to
The controller 83 performs the normal control when the fastener 48 does not clog. When the controller determines that the fastener 48 clogs in the ejection path 31, it allows the second holding control to be operated without performing the normal control.
The second holding control is control of rotating the electric motor 43 in the second direction to rotate the rotary component 38 clockwise in
First, with reference with
When the rotary component 38 rotates clockwise as shown in
Next, a function performed when the pinion 41B does not smoothly enter the concave part 42b is described with reference to
When detecting that the pinion 41B enters the concave part 42b and makes contact with the lower convex part 42a, the controller 83 stops the electric motor 43, and then, rotates the electric motor 43 in the first direction. In this manner, the rotary component 38 rotates counterclockwise in
Note that the controller 83 performs a first release control or a second release control when the operator operates the reset switch 89 after removing the fastener 48 from the ejection path 31. In the third embodiment of the driver 10, the electric motor 43 corresponds to a motor, the controller 83 corresponds to a controller, the pneumatic chamber 21 corresponds to an impact component, and the pinions 41, particularly the pinion 41B, corresponds to an engagement member.
A fourth embodiment of the driver is described with reference to
A knock pin 137 is provided to a free end of the latch 135. The knock pin 137 may be rotatable with respect to the latch 135. The knock pin 137 is disposed between the support shaft 134 and the drive shaft 39 in the center line B1 direction. The knock pin 137 is disposed between the driver blade 23 and the support shaft 134 in a direction at the right angle with respect to the center line B1. The knock pin 137 is engageable with and releasable from the rack 42. Also, the knock pin 137 is movable in the center line B1 direction in a state of being in contact with the convex part 42a of the rack 42.
The arm 133 is bent in the middle of a longitudinal direction, and the support shaft 132 is disposed in the middle in the longitudinal direction of the arm 133. The arm 133 has a first contact part 138 and a second contact part 139 on both sides of the support shaft 132. The first contact part 138 is disposed between the support shaft 132 and the support shaft 134 in the center line B1 direction. The first contact part 138 is capable of making contact with and departing from the free end of the latch 135. The second contact part 139 is disposed between the cam part 77 and the support shaft 132. The second contact part 139 makes contact with the cam part 77.
Furthermore, the outer peripheral surface 77A is formed in an arc shape around the center line B2. From the outer peripheral surface 77A, a swelling part 77B protruding outward in a radial direction of the cam part 77 is provided. The swelling part 77B is displaced with respect to the outer peripheral surface 77A of the cam part 77 in the radial direction of the cam part 77.
(Case without Clogging of Fastener)
An example of use in a case without the clogging of the fastener 48 in the driver 10 of the fourth embodiment is described with reference to
When the trigger switch 53 is turned ON and the push sensor 50 is turned ON, the controller 83 rotates the electric motor 43 in the first direction. In this manner, the rotary component 38 rotates in a counterclockwise direction in
Then, before the driver blade 23 reaches the top dead point, for example, before the pinion 41 positioned at a rear end in the rotating direction of the rotary component 38 is released from the convex part 42a that is the nearest to the distal end 23a of the driver blade 23 as shown in
Then, when the second contact part 139 is in contact with the outer surface of the swelling part 77B, the driver blade 23 reaches the top dead point, all pinions 41 are released from the rack 42, and the driver blade 23 is moved toward the bottom dead point by the air pressure of the pneumatic chamber 21, so that the driver blade 23 impacts the fastener 48. After the driver blade 23 impacts the fastener 48, the controller 83 moves the driver blade 23 to the standby position so as to stop the electric motor 43 as similar to the first embodiment.
(Case with Clogging of Fastener)
An example of use in a case with the clogging of the fastener 48 in the driver 10 of the fourth embodiment is described with reference to
In this manner, the second contact part 139 is away from the swelling part 77B, the arm 133 is rotated clockwise by the force of the elastic member 136, and the controller 83 stops the electric motor 43 at a moment at which the arm makes contact with the outer peripheral surface 77A as shown in
Thus, even an air pressure is applied to the driver blade 23, the knock pin 137 does not get over the convex part 42a, and the engagement between the knock pin 137 and the rack 42 is kept. That is, the latch 135 does not rotate about the support shaft 134. The force by which the driver blade 23 is biased toward the bottom dead point is received by the ejection part 27 through the latch 135. Therefore, when the operator removes the fastener 48 from the ejection path 31, the movement of the driver blade 23 toward the bottom dead point can be prevented, so that the operability can be improved.
After the operator removes the fastener 48, when detecting that the trigger switch 53 is turned ON and the push sensor 50 is turned ON, the controller 83 rotates the electric motor 43 in the second direction, and stops the electric motor 43 at a moment at which the second contact part 139 of the arm 133 makes contact with the outer surface of the swelling part 77B as shown in
Before the driver blade 23 reaches the top dead point, the knock pin 137 gets over an auxiliary rack 24c, and engages with the auxiliary rack 24c when the driver blade 23 reaches the top dead point. Thus, when the rotary component 38 rotates counterclockwise in
Even when the positions of the pinion 41 and the convex part 42a are difficult to engage with each other after removal of the fastener 48, note that the knock pin 137 engages with the auxiliary rack 24c, so that the movement of the driver blade 23 toward the bottom dead point can be avoided.
A fifth embodiment of the driver is described with reference to
The guide plate 129 has an opening 130, and the opening 128 and the opening 130 are disposed so as to overlap each other in a front view of the driver 10. When the shaft member 124 rotates, the second latch 126 enters and exits from the ejection path 31 through the inside of the opening 128.
The controller 83 detects at least either that the push rod 32 is away from the driven member W1 or that the trigger switch 53 is OFF, and stops the electric motor 43. Also, as shown in
Furthermore, the shaft member 124 is biased and rotated clockwise in
When the push rod 32 is pressed against the driven member W1, the push rod 32 moves in a direction of approaching the bumper 25 so as to be against the bias force of the compression coil spring 120. In this manner, the push rod 32 makes contact with the first latch 125 to rotate the shaft member 124 counterclockwise in
When detecting that the push rod 32 is pressed against the driven member W1 and the trigger switch 53 is turned ON, the controller 83 drives the electric motor 43 to rotate the rotary component 38 counterclockwise in
Then, as shown in
The controller 83 continues driving of the electric motor 43 even after the fastener 48 is driven into the driven member W1, engages the pinions 41 and the rack 42, and moves the driver blade 23 from the bottom dead point to the top dead point. As shown in
When the push rod 32 is away from the driven member W1 after the impacting work is performed without the clogging of the fastener 48 in the ejection path 31, the shaft member 124 is rotated clockwise in
In this manner, the electric motor 43 is driven, the rotary component 38 rotates counterclockwise in
Furthermore, the operator puts the push rod 32 away from the driven member W1 and releases the operation force from the trigger 52 to remove the fastener 48 from the ejection path 31. The second latch 126 described in the fifth embodiment corresponds to an engagement member.
A first specific example of a sixth embodiment of the driver is described with reference to
A longitudinal direction of the screw member 93 is the same as the center line B1 direction. The screw member 93 is supported so as to be rotatable but not movable in the longitudinal direction by the guide member 94. Also, an engagement member 98 is attached to the male screw shaft 95. The engagement member 98 has a female screw part, is rotatable with respect to the male screw shaft 95, and is movable in the longitudinal direction of the screw member 93. The engagement member 98 is not rotatable with respect to the blade guide 28. A thrust bearing 101 is interposed between the head part 96 and the guide member 94. The boss part 97 has a groove.
Furthermore, the driver blade 23 has a convex part 99 as a rack different from the rack 42. The convex part 99 protrudes from an edge of the driver blade 23, the edge being opposite to the edge where the rack 42 is provided. The convex part 99 is disposed to be upper than the engagement member 98 in the center line B1 direction. Other configurations shown in
When the fastener 48 does not clog in the ejection path 31 and the driver blade 23 is posited at the bottom dead point, there is a gap between the engagement member 98 and the convex part 99 as shown in
On the other hand, when the fastener 48 clogs in the ejection path 31 and the driver blade 23 stops before reaching the bottom dead point, the operator inserts a distal end of a tool 100 into the groove of the boss part 97, and rotates the tool 100 about the center axis of the screw member 93 in the first direction. In this manner, the engagement member 98 moves in a direction of approaching the head part 96 along the male screw shaft 95 of the screw member 93. Then, the operator stops the tool 100 at a moment at which the engagement member 98 makes contact with the convex part 99 as shown in
When the fastener 48 is removed from the ejection path 31, the load is transmitted to the screw member 93 through the convex part 99 and the engagement member 98 so as to attempt the movement of the driver blade 23 toward the bottom dead point. Since the screw member 93 is immovable in the center line B1 direction, the load attempting the movement of the driver blade 23 toward the bottom dead point is received by the blade guide 28 through the thrust bearing 101. That is, when the fastener 48 clogs in the ejection path 31, the driver blade 23 can be prevented from moving in a direction of approaching the bottom dead point in the center line B1 direction with respect to the ejection part 27.
When the operator manually rotates the tool 100 in the second direction after removing the fastener 48, the screw member 93 rotates, and the engagement member 98 moves in the center line B1 direction with respect to the screw member 93. The engagement member 98 moves in a direction of approaching the boss part 97. In this manner, the driver blade 23 moves toward the bottom dead point while the convex part 99 and the engagement member 98 are in contact with each other. That is, the engagement member 98 approaches the boss part 97 as receiving the load of the driver blade 23. Then, after the driver blade 23 reaches the bottom dead point as shown in
A second specific example of the sixth embodiment is described with reference to
A first bevel gear 105 is provided to the rotation shaft 103, and a second bevel gear 106 is provided to the head part 96. The first bevel gear 105 meshes with the second bevel gear 106. Other configurations of the driver 10 shown in
In the driver 10 shown in
On the other hand, when determining that the fastener 48 clogs in the ejection path 31, the controller 83 drives the electric motor 102 to rotate the rotation shaft 103, for example, clockwise in
When the fastener 48 is removed from the ejection path 31, the load is received by the blade guide 28 through the screw member 93 and the thrust bearing 101 so as to attempt the movement of the driver blade 23 toward the bottom dead point. That is, in the case with the clogging of the fastener 48 in the ejection path 31, the driver blade 23 can be prevented from moving in a direction of approaching the bottom dead point in the center line B1 direction with respect to the ejection part 27.
After the operator removes the fastener 48 and the operator operates the release switch 104, the controller 83 drives the electric motor 102 to rotate the rotation shaft 103 counterclockwise in
Note that the second specific example may be configured so that a manual switch 107 shown in
A third specific example of the sixth embodiment of the driver is described with reference to
A tool 109 that is detachable to the guide member 94 is provided. The tool 109 has a male screw part 110, and the male screw part 110 is inserted into the female screw hole 108 and is rotatable with respect to the female screw hole 108. Other configurations shown in
When the driver blade 23 is positioned at the bottom dead point in the case without the clogging of the fastener 48 in the ejection path 31, there is a gap between the guide member 94 and the convex part 99 as shown in
And, when the driver blade 23 stops before reaching the bottom dead point as shown in
When the fastener 48 is removed from the ejection path 31, the load is transmitted to the blade guide 28 through the tool 109 and the guide member 94 so as to attempt the movement of the driver blade 23 toward the bottom dead point. Since the tool 109 is immovable in the center line B1 direction, such a load as attempting the movement of the driver blade 23 toward the bottom dead point is received by the blade guide 28. That is, in the case with the clogging of the fastener 48 in the ejection path 31, the driver blade 23 can be prevented from moving in a direction of approaching the bottom dead point in the center line B1 direction with respect to the ejection part 27.
After the operator removes the fastener 48 and rotates the tool 109 in the second direction, the tool 109 moves in the center line B1 direction so as to be away from the rotary component 38. In this manner, the driver blade 23 moves toward the bottom dead point while the convex part 99 and the distal end of the tool 109 make contact with each other. Then, after the driver blade 23 reaches the bottom dead point as shown in
A fourth specific example of the sixth embodiment of the driver is described with reference to
The support frame 113 has a base part 116, two arm parts 117 extending from the base part 116 in parallel to each other, and engagement parts 118 respectively provided to the two arm parts 117. The base part 116 has a female screw hole 119. Other configurations shown in
In the case without the clogging of the fastener 48 in the ejection path 31, the support mechanism 112 is not attached to the blade guide 28. On the other hand, when the driver blade 23 stops before reaching the bottom dead point as shown in
And, when the male screw shaft 115 is inserted into the female screw hole 119 to rotate the screw member 114 in the first direction, the screw member 114 moves with respect to the support frame 113, and moves in a direction of approaching the rotary component 38 in the center line B1 direction. The operator stops the screw member 114 at a moment at which the distal end of the male screw shaft 115 makes contact with the convex part 99 as shown in
When the fastener 48 is removed from the ejection path 31, the load is transmitted to the blade guide 28 through the screw member 114 and the support frame 113 so as to attempt the movement of the driver blade 23 toward the bottom dead point. Since the support frame 113 does not move in the center line B1 direction with respect to the blade guide 28, such a load as attempting the movement of the driver blade 23 toward the bottom dead point is received by the blade guide 28. That is, in the case with the clogging of the fastener 48 in the ejection path 31, the driver blade 23 can be prevented from moving in a direction of approaching the bottom dead point in the center line B1 direction with respect to the ejection part 27.
After the operator removes the fastener 48, the operator pulls out the two engagement parts 118 from the attachment grooves 111, and removes the support mechanism 112 from the blade guide 28.
In the sixth embodiment of the driver 10, in the case with the clogging of the fastener 48 in the ejection path 31, the driver blade 23 can be supported without using the torque of the electric motor 43. Also, since the driver blade 23 is supported by using the screw member, the driver blade 23 can be supported by the support mechanism even if the driver blade stops at any position in the center line B1 direction. Also, after the fastener 48 is removed, stepless movement of the screw member is achieved by rotating the screw member. Therefore, the driver blade 23 can be prevented from moving toward the bottom dead point at a high speed.
The driver is not limited to the above-described embodiments, and various alterations can be made within the scope of the present invention. For example, the driver may be a driver having a pneumatic chamber formed in a bellows, a piston fixed to an end part of the bellows, and a guide member which movably supports the piston. Furthermore, the driver may have a structure in which the piston is moved by an elastic force of a spring. The spring includes a metallic compression spring. The spring corresponds to an impact component. Note that the guide member may be not only a cylinder but also a linear rail. An operation mechanism which moves the piston in a direction of being away from a bumper is not only a rack-and-pinion mechanism but also includes a pulley and a wire. That is, the operation mechanism includes a structure in which the piston is moved by a tractive force of the wire. Furthermore, the driver includes a driver which supplies compressed air generated by a compressor to the pneumatic chamber through an air hose.
Furthermore, the electric motor described in the embodiments includes a direct-current motor with a battery as a direct-current power supply as a motive power source and an alternating-current motor using an alternating-current power supply. Furthermore, as the motor, in place of the electric motor, any of an oil hydraulic motor, a pneumatic motor, and an internal combustion may be used. Also, an outer peripheral shape of the impactor in a plan view perpendicular to a first center line may be any of a quadrangle, a rectangle, a square, a circle, and so forth. A form of the impactor may be any of a shaft form, a blade form, and so forth. The fastener includes not only a shaft-form nail but also a U-form fastener. The driven member to which the fastener is to be driven may be made of any of wood, plasterboard, or others.
Still further, the first component member and the second component member are not limited to be disposed so as to overlap each other in a plan view perpendicular to the first center line, but also the plan view may be not the plan view perpendicular to the first center line as long as it is any crossing plan view. The impactor includes not only a configuration in which the first center line as a center axis of the cylinder is positioned at the center of the impactor but also a configuration in which the first center line shifts from the center position of the impactor. That is, the impactor is only required to be movable in parallel to the first center line, and the center of the impactor and the first center line may be at separated positions from each other in a plan view crossing the first center line.
Note that the present specification has described the driver in which the cam plate 59 is moved by manually moving the lock lever, and the driver includes a first modification example. In the first modification example of the driver, the controller of the driver determines clogging of a nail when the driver blade 23 as an impactor does not move to the bottom dead point. Furthermore, in the first modification example of the driver, the cam plate 59 can be automatically moved by an actuator. The actuator includes a motor, and the controller controls the motor. And, in the first modification example of the driver, when the controller determines the clogging of the nail, the cam plate 59 is moved by using the motor, and the movement of the driver blade 23 is automatically regulated.
Furthermore, the driver includes a second modification example. The second modification example of the driver has a configuration in which the movement of the driver blade 23 as the impactor is regulated by moving the cam plate 59 by using a movement mechanism such as a solenoid or a spring. The driver includes a third modification example. The third modification example of the driver has a structure in which the movement of the driver blade 23 is regulated by using a solenoid, a spring, or a fixing screw as an engagement member and directly engaging the engagement member with the driver blade 23 as the impactor.
The driver may be configured so that the engagement member cannot be detached unless the impactor is detached by disposing at least a part of the engagement member between the first component member and the driver blade 23 as the impactor.
The motor for use in the driver includes an electric motor, an oil hydraulic motor, a pneumatic motor, and an engine. The control of switching the rotating direction of the engine between the first direction and the second direction is handled by providing a switching mechanism between the engine and the rotary component, the switching mechanism switching the direction of the rotary component between a forward direction and a reverse direction, while the rotating direction of the engine itself can be the same therebetween. The electric motor may be either a brush-equipped motor or a brushless motor.
10 . . . driver, 19 . . . pressure accumulation container, 21 . . . pneumatic chamber, 23 . . . driver blade, 25 . . . bumper, 27 . . . ejection part, 28 . . . blade guide, 30 . . . cover, 31 . . . ejection path, 32 . . . push rod, 32a . . . distal end, 38 . . . rotary component, 41, 41A, 41B . . . pinion, 42 . . . rack, 43 . . . electric motor, 48 . . . fastener, 55 . . . fixing mechanism, 56 . . . lock plate, 57, 73 . . . lock lever, 62, 63 . . . guide rail, 58, 74 . . . support shaft, 76 . . . motive power mechanism, 83 . . . controller, B1, B3, B4 . . . center line, W1 . . . driven member.
| Number | Date | Country | Kind |
|---|---|---|---|
| JP2015-117586 | Jun 2015 | JP | national |
| JP2015-193919 | Sep 2015 | JP | national |
| JP2016-072920 | Mar 2016 | JP | national |
This is a Continuation of U.S. patent application Ser. No. 15/580,638, filed on Dec. 7, 2017, which is the U.S. National Phase under 35 U.S.C. § 371 of International Patent Application No. PCT/JP2016/066417, filed on Jun. 2, 2016, which claims the benefit of Japanese Patent Application No. 2015-117586, filed on Jun. 10, 2015, Japanese Patent Application No. 2015-193919, filed on Sep. 30, 2015, and Japanese Patent Application No. 2016-072920, filed on Mar. 31, 2016, the entire contents of each are hereby incorporated by reference in their entirety.
| Number | Name | Date | Kind |
|---|---|---|---|
| 2933290 | Ryder, Jr. | Apr 1960 | A |
| 3589588 | Vasku | Jun 1971 | A |
| 4215808 | Sollberger | Aug 1980 | A |
| 4807793 | Ghibely | Feb 1989 | A |
| 5388749 | Davignon | Feb 1995 | A |
| 6997367 | Hu | Feb 2006 | B2 |
| 7152774 | Chen | Dec 2006 | B2 |
| 7334715 | Oda | Feb 2008 | B2 |
| 8011441 | Leimbach | Sep 2011 | B2 |
| 8763874 | McCardle | Jul 2014 | B2 |
| 10173310 | Wyler | Jan 2019 | B2 |
| 20050082334 | Hu | Apr 2005 | A1 |
| 20050242154 | Leimbach | Nov 2005 | A1 |
| 20060027622 | Sun | Feb 2006 | A1 |
| 20060180631 | Pedicini | Aug 2006 | A1 |
| 20090090759 | Leimbach | Apr 2009 | A1 |
| 20090090762 | Leimbach | Apr 2009 | A1 |
| 20110198381 | McCardle | Aug 2011 | A1 |
| 20110290846 | Leimbach | Dec 2011 | A1 |
| 20150202755 | Tanji | Jul 2015 | A1 |
| 20150290786 | Largo | Oct 2015 | A1 |
| 20150352702 | Chien | Dec 2015 | A1 |
| 20160229043 | Wyler | Aug 2016 | A1 |
| 20160288305 | McCardle | Oct 2016 | A1 |
| 20170190037 | Sato | Jul 2017 | A1 |
| 20180126528 | Pomeroy | May 2018 | A1 |
| 20180154505 | Sato | Jun 2018 | A1 |
| 20190202042 | Wu | Jul 2019 | A1 |
| 20190321955 | Carrier | Oct 2019 | A1 |
| 20200338708 | Po | Oct 2020 | A1 |
| 20210308852 | Ueda | Oct 2021 | A1 |
| 20220226977 | Nettleton | Jul 2022 | A1 |
| 20220241947 | Ward | Aug 2022 | A1 |
| 20220241948 | Baba | Aug 2022 | A1 |
| Number | Date | Country |
|---|---|---|
| 3 263 286 | Jan 2018 | EP |
| 2008-119780 | May 2008 | JP |
| 2010-029951 | Feb 2010 | JP |
| 2012-236252 | Dec 2012 | JP |
| 2014-069289 | Apr 2014 | JP |
| Entry |
|---|
| Chinese Office Action issued in corresponding Chinese Patent Application No. 201680033808.7, dated Jul. 1, 2020, with English translation. |
| U.S. PTO Non-Final Office Action issued in related parent U.S. Appl. No. 15/580,638, dated Feb. 5, 2020. |
| U.S. PTO Notice of Allowance issued in related parent U.S. Appl. No. 15/580,638, dated Jul. 23, 2020. |
| U.S. Appl. No. 15/580,638, filed Dec. 7, 2017. |
| Search Report issued in corresponding International Patent Application No. PCT/JP2016/066417, dated Aug. 23, 2017. |
| Extended European Search Report issued in corresponding European Patent Application No. 16807377.3-1019, dated Jan. 4, 2019. |
| Number | Date | Country | |
|---|---|---|---|
| 20210031347 A1 | Feb 2021 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 15580638 | US | |
| Child | 17073033 | US |
