JP2006142392A - Motor-driven nailing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a motor-driven nailing machine capable of realizing miniaturization, compactification, weight-reduction, and cost-reduction by reducing the number of components. <P>SOLUTION: The motor-driven nailing machine 1 is composed by including a housing 2, a plunger 13 for driving a nail with reciprocation in the housing 2, a supporting roller 15 for supporting the plunger 13, an outer rotor (a motor) 16 for driving the plunger 13, a rotor (a driving roller) rotationally driven by the outer rotor 16, and a moving means (a linear motor 23 and an arm 25) for making the outer rotor 16 or the supporting roller 15 contact with or separate from the plunger 13 by moving the outer rotor 16 or the supporting roller 15. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an electric nailing machine in which a nail is driven by a plunger that reciprocates in a housing using a motor as a drive source.

  As a driving method of the nailing machine, an air type using a compressor is most frequently used. When nailing with this pneumatic nailing machine, for example, to move from the first floor to the second floor of a house, it is necessary to carry a heavy compressor from the first floor to the second floor. However, there was a problem that a lot of labor was required.

  In addition, there are often few flat places on the work site where materials and tools are carried in, and it is not easy to secure a place for installing the compressor.

  Therefore, an electric nailing machine using the electromagnetic force of the solenoid coil as a main power source has been proposed. According to this, a compressor is unnecessary, but the solenoid generally has a low electric efficiency of 5 to 20%, so that power consumption is low. Becomes larger. Also, in this type of electric nail driver, the energy for driving the nail must be supplied while the plunger moves in the solenoid, the longitudinal dimension of the solenoid becomes long, and the compressor is used to drive the same nail. The product weight more than three times the weight of the pneumatic nailer excluding the above is required, and it is difficult to work for a long time with the electric nailer in hand.

  For this reason, an electric nail driver for driving nails using the inertia of a flywheel has been proposed (see Patent Document 1). In this type of electric nail driver, the electric efficiency of the motor used to rotate the flywheel is as high as 50 to 90%, and it is necessary to supply energy for driving the nail while the plunger moves in the solenoid. Since the length of the solenoid in the longitudinal direction is long, the product weight can be reduced to about 1.5 times the weight of the pneumatic nailer excluding the compressor.

JP-A-6-278051

  However, in the electric nailing machine according to the above proposal, as a mechanism for transmitting the rotation of the motor to the flywheel through the gear and rotating the flywheel, and transmitting the energy of the flywheel to the plunger only when driving the nail. Since a complicated clutch with a large number of parts was used, it was necessary to install flywheels, gears, clutches, etc., which are parts separate from the motor. This increased the size and weight of the nailer and increased the number of parts. There was a problem of incurring a cost increase.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide an electric nail driver that can reduce the number of parts to reduce the size, size, weight, and cost. is there.

  In order to achieve the above object, an invention according to claim 1 includes a housing, a plunger that reciprocates in the housing and drives a nail, a support roller that supports the plunger, a motor that drives the plunger, An electric nail driving machine including a driving roller that is rotationally driven by a motor and covers at least a part of the outer periphery of the stator of the motor, and a moving means that moves the driving roller or the support roller to contact and separate the plunger. It is characterized by comprising.

  According to a second aspect of the present invention, in the first aspect of the present invention, the rotational axes of the drive roller and the motor are made to coincide with each other.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the drive roller is constituted by a rotor of the motor.

  According to a fourth aspect of the present invention, in the first aspect of the present invention, the moving means includes an actuator having an actuator that reciprocates by electromagnetic force, and the reciprocating motion of the actuator of the actuator is controlled by the drive roller or the support roller. It is characterized by comprising an arm that converts it into a rotating motion.

  The invention according to claim 5 is the invention according to any one of claims 1 to 3, wherein the motor is arranged between the plunger and the handle.

  According to a sixth aspect of the present invention, in the fifth aspect of the present invention, the motor is arranged so as to intersect with each other in a state where the rotation axis and the handle axis are projected on a plane perpendicular to the plunger moving direction. It is characterized by that.

  A seventh aspect of the invention is characterized in that, in the first aspect of the invention, the plunger is disposed between the support roller and the driving roller.

  According to an eighth aspect of the present invention, in the first aspect of the invention, when the trigger switch is turned on, the moving means is driven to bring the support roller or the driving roller into contact with the plunger to perform nailing, and the trigger switch is turned on. When a predetermined time elapses after being turned on, the support roller or the driving roller is separated from the plunger by the moving means.

  According to the first and second aspects of the present invention, the drive roller or the support roller that is rotationally driven by the motor is moved by the moving means, and the plunger is directly driven by bringing the drive roller into and out of contact with the plunger. Because it is configured to cover at least a part of the outer periphery of the stator, parts such as the flywheel, the gear that connects the flywheel and the drive source, and the clutch that has a complicated mechanism are no longer necessary, reducing the number of parts. Thus, the electric nailer can be reduced in size, weight, and cost.

  According to the third aspect of the present invention, since the driving roller is composed of the rotor of the motor, there is no need for an independent part as the driving roller, the number of parts is further reduced, and the electric nailer is further reduced in size and size. Weight reduction and cost reduction are achieved.

  According to the fourth aspect of the present invention, since the reciprocating motion of the actuator actuator is converted into the rotational motion of the driving roller or the supporting roller by the arm, and this is moved toward and away from the plunger, The degree of freedom increases, and the product shape can be set according to user needs.

  According to the invention of claim 5, since the motor is arranged between the plunger and the handle, the height dimension from the plunger at the nail driving position can be kept small, and the work at the wall can be performed. As a result, the weight balance of the electric nailer is improved and workability is improved.

  According to the invention described in claim 6, since the motor is disposed so as to intersect with each other in a state where the rotation axis and the handle axis are projected on a plane perpendicular to the plunger moving direction, that is, disposed horizontally. Miniaturization can be achieved by keeping the height of the product low.

  According to the seventh aspect of the present invention, since the plunger is disposed between the support roller and the drive roller, the movement amount and the movement time of the support roller or the drive roller when the support roller or the drive roller is moved toward and away from the plunger. Can be kept small, and the continuous firing speed of the nail can be increased to improve the working efficiency.

  According to the eighth aspect of the present invention, when a predetermined time elapses after the trigger switch is turned ON, even if the trigger switch is not turned OFF, the support roller or the drive roller is separated from the plunger by the moving means to move the plunger. Since the position is returned to the initial position, the nail can be fired at the timing when the operator's trigger switch is turned on.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

<Embodiment 1>
FIG. 1 is a cutaway side view of an electric nail driver 1 according to an embodiment of the present invention. The illustrated electric nail driver 1 has a housing 2, and a handle 3 extends from the side of the housing 2. The battery 4 as a power source is detachably attached to the lower portion of the handle 3.

  The handle 3 has one end of a magazine 6 filled with a large number of nails 5 fixed to the handle 3 by bolts 7. The magazine 6 is attached to the housing 2 at one end and is slanted. A gap δ is formed between the housing 8 and a guide 8 that protrudes horizontally from the housing 2 toward the front (left side in FIG. 1). The gap δ guides the driving direction of the nail 5, and the nails 5 are supplied from the magazine 6 to the gap δ one by one.

  Further, a trigger switch 9 is provided near the handle 3 at the bottom of the housing 2, and a main power switch 10 is provided near the trigger switch 9 of the handle 3.

  By the way, the upper and lower bosses 11 and 12 are projected horizontally and integrally in the housing 2 from the rear wall toward the front, and a plate-like plunger 13 is inserted into a hole 11a formed in one boss 11. Is inserted so as to be able to reciprocate back and forth. The plunger 13 is provided at the same height as the gap δ, and is always urged rearward (in the initial position direction) by a spring 14 that is retracted in the hole 11 a of the boss 11.

  A support roller 15 and an outer rotor 16 are disposed at positions facing each other with the plunger 13 in between. The support roller 15 is rotatably supported by a shaft 17 fixed to the housing 2, and is always in contact with the upper surface of the plunger 13. The outer rotor 16 is obtained by integrating a motor, which is a driving source, and a driving roller, and details of the configuration are shown in FIG.

  That is, FIG. 2 is a cutaway perspective view of the outer rotor 16. As shown in FIG. 2, the outer rotor 16 has a fixed shaft 18 at the center, and the fixed shaft 18 has a hollow roller-like rotor core 19a. Is rotatably supported via a bearing 20, and a permanent magnet 19b is fixed to the inner surface of the rotor core 19a. A rotor 19 is constituted by the rotor core 19a and the permanent magnet 19b, and the rotor 19 also serves as a driving roller. A resin layer 21 is formed on the outer peripheral surface of the rotor core 19a.

  A stator core 22a fixed to the fixed shaft 18 is housed inside the rotor core 19a, and a stator coil 22b is wound around the stator core 22a. The stator 22 is constituted by the core 22a and the stator coil 22b.

  Here, as shown in FIG. 1, the outer rotor 16 is disposed between the plunger 13 and the handle 3, and the axis of rotation of the outer rotor 16 and the axis of the handle 3 intersect perpendicularly with the moving direction of the plunger 13. They are arranged sideways so as to intersect each other when projected onto a plane.

  By the way, as shown in FIG. 1, a linear motor 23 as an actuator is horizontally attached to the boss 12 in the housing 2, and the end portion of the piston 24 provided in the linear motor 23 is a pair of left and right. It is connected to the outer rotor 16 via an arm 25. The linear motor 23 and the arm 25 constitute moving means for moving (rotating) the outer rotor 16 and bringing it into contact with and separating from the plunger 13.

  Here, the basic configuration and operation of the linear motor 23 will be described with reference to FIG.

  3A and 3B are cross-sectional views of the linear motor 23. The linear motor 23 inserts the piston 24 in the center of a cylindrical housing 26 so as to be able to reciprocate, Two coils C1 and C2 are arranged around the piston 24 in the axial direction (sliding direction of the piston 24).

  Thus, in the linear motor 23 having the above configuration, when one coil C1 is energized, the piston 23 is pushed forward by the electromagnetic force generated in the coil C1, as shown in FIG. When the coil C2 is energized, the piston 24 moves backward as shown in FIG. 3B by the electromagnetic force generated in the coil C2. Therefore, by alternately energizing the coils C1 and C2, the piston 24 can be reciprocated (advanced and retracted).

  Next, the configuration and operation of the moving means will be described with reference to FIG.

  FIG. 4 is a perspective view showing the configuration of the moving means. The pair of left and right arms 25 are formed in an L shape, and an arm shaft 27 is inserted in the middle portion thereof. 2 is fixed. Accordingly, the left and right arms 25 are supported by the housing 2 so as to be rotatable about the arm shaft 27, and the outer rotor 16 is rotatably supported at one end thereof. Further, a long hole 25a is formed at the other end of each arm 25, and both ends of the shaft 28 are engaged with both the long holes 25a. The tip of the piston 24 is bound.

  Thus, as described above, when one coil C1 of the linear motor 23 is energized and the piston 24 is pushed out as shown in FIG. 3A, the arm 25 and the outer rotor 16 supported by the arm 25 support the arm shaft 27. As the center rotates in the clockwise direction of FIG. 1, the outer rotor 16 is brought into contact with the lower surface of the plunger 13, and the other coil C2 of the linear motor 23 is energized to make the piston 24 as shown in FIG. When retracted, the arm 25 and the outer rotor 16 supported by the arm 25 rotate about the arm shaft 27 in the counterclockwise direction in FIG. 1, so that the outer rotor 16 is separated from the plunger 13.

  Incidentally, the electric nailer 1 according to the present embodiment has a built-in control circuit for controlling the energization to the outer rotor 16 and the linear motor 23. The configuration of the control circuit is based on FIG. explain.

  That is, FIG. 5 is a block diagram showing the configuration of the control circuit. The battery 4 as a power source includes the main power switch 10, trigger switch 9, timer switch control circuit 29, motor rotation speed control circuit 30, coil C1, Timer switches S1 and S2 respectively connected to C2 and coils C1 and C2 are respectively connected in parallel. The motor rotation speed control circuit 30 is connected to a stator coil 22b of the outer rotor 16.

  Next, the operation of the electric nail driver 1 having the above configuration will be described with reference to FIG.

  FIGS. 6A to 6F are broken side views showing the operation of the electric nail driver 1 according to the driving procedure thereof. In the initial state (non-operating state) shown in FIG. Both the trigger switch 9 and the trigger switch 9 are in an OFF state, and no current is supplied from the battery 4 to the outer rotor 16 and the linear motor 23, and these are in an inoperative state. Accordingly, the outer rotor 16 in the stopped state is separated from the plunger 13 as shown in the figure, and the plunger 13 is in the retracted position (initial position) by the spring 14.

  Next, as shown in FIG. 6B, when the main power switch 10 is turned on, the stator coil 22b of the outer rotor 16 is energized from the battery 4 via the motor speed control circuit 30, and therefore the rotor 19 of the outer rotor 16 is energized. Since the timer switch S2 is turned on and the coil C2 of the linear motor 23 is energized at the same time as the rotation starts, the piston 24 of the linear motor 23 is retracted and the outer rotor 16 is fixed away from the plunger 13. Therefore, in this state, the rotor 19 of the outer rotor 16 rotates idly while being separated from the plunger 13.

  When the trigger switch 9 is turned on as shown in FIG. 6C in the above state, the timer switch control circuit 29 is energized, and the timer switch control circuit 29 is set for a preset time (for example, 0.2 seconds). The timer switch S1 of the linear motor 23 is turned on and the timer switch S2 is turned off. Then, the coil C1 of the linear motor 23 is energized, the piston 24 advances, and the arm 25 and the outer rotor 16 supported by the arm 25 are rotated about the arm shaft 27 in the clockwise direction (upward) in the figure. 16 abuts on the plunger 13, and the outer rotor 16 clamps the plunger 13 with the support roller 15. For this reason, a frictional force is generated between the rotor 19 (resin layer 21) of the rotating outer rotor 16 and the plunger 13, and the plunger 14 is synchronized with the rotational speed of the rotor 19 by this frictional force. 6 is pushed forward against the urging force and collides with the end of the nail 5 as shown in FIG. 6D, and the nail 5 is driven along the guide 8 by this collision force.

  When a preset time (for example, 0.2 seconds) elapses, the timer switch control circuit 29 turns on the timer switch S2 of the linear motor 23 and turns off the timer switch S1. Then, the coil C2 of the linear motor 23 is energized and the piston 24 moves backward, and the arm 25 and the outer rotor 16 supported by the arm 25 and the outer rotor 16 supported by the arm 25 are counterclockwise as shown in FIG. 6 (e). Since the outer rotor 16 is moved away from the plunger 13 and the transmission of the driving force from the outer rotor 16 to the plunger 13 is interrupted, as shown in FIG. Is pulled back by the urging force of the spring 14 to return to the original initial position, and the next nail 5 is loaded from the magazine 6 into the gap δ with the guide 6.

  After that, a plurality of nails 5 are fired continuously and driven in at the timing when the trigger switch 9 is turned on. In this embodiment, a predetermined time (0.2 seconds) has passed since the trigger switch 9 was turned on. When the trigger switch 9 is not turned off, the outer rotor 16 is separated from the plunger 13 by the linear motor 23 to return the plunger 13 to the initial position even when the trigger switch 9 is not turned off. Can be fired continuously.

  As described above, in the present embodiment, the plunger 13 is directly driven by bringing the outer rotor 16 serving as the rotational drive source into contact with and separating from the plunger 13 by the linear motor 23 constituting the moving means. Parts such as a flywheel, a gear for connecting the flywheel and a drive source, and a clutch having a complicated mechanism are not required, and the number of parts is reduced, so that the electric nailer 1 is reduced in size, weight and cost. Can be achieved.

  Further, since the driving roller is constituted by the rotor 19 of the outer rotor 16, no independent parts are required as the driving roller, the number of parts is further reduced, and the electric nailer 1 is further reduced in size, weight and cost. You can go down.

  Furthermore, since the reciprocating motion of the piston 24 of the linear motor 23 is converted into the rotational motion of the outer rotor 16 by the arm 25 and is moved toward and away from the plunger 13, the degree of freedom of the installation location of the linear motor 23 increases. The product shape can be set according to user needs. In this case, by providing an angle to the shape of the arm 25, the degree of freedom of the installation location of the linear motor 23 can be further increased.

  In the present embodiment, since the outer rotor 16 is disposed between the plunger 13 and the handle 3, the height dimension from the plunger 13 at the driving position of the nail 5 (dimension h shown in FIG. 1) is kept small. As a result, the work on the wall can be performed, and the weight balance of the electric nail driver 1 can be improved to improve workability.

  Since the outer rotor 16 is arranged so as to intersect each other in a state where the rotation axis and the axis of the handle 3 are projected on a plane perpendicular to the moving direction of the plunger 13, that is, the outer rotor 16 is arranged sideways. The electric nailer 1 can be reduced in size and size by reducing the overall height of the nailer 1.

  Furthermore, since the plunger 13 is disposed between the support roller 15 and the outer rotor 16, the movement amount (rotation amount) and the movement time (rotation time) of the outer rotor 16 when the outer rotor 16 is brought into and out of contact with the plunger 13 are small. It is restrained and the continuous firing speed of the nail 5 can be increased and the working efficiency can be improved.

<Embodiment 2>
Next, an embodiment of the present invention will be described.

  FIG. 7 is a cutaway side view of the electric nail driver 1 ′ according to the present embodiment. In FIG. 7, the same elements as those shown in FIG. Will not be described again.

  In the present embodiment, only the linear motor 23 is used as a moving means for moving the outer rotor 16 and moving it toward and away from the plunger 13, and the linear motor 23 faces the support roller 15 on the bottom surface in the housing 2. The outer rotor 16 is directly attached to the tip (upper end) of the piston 24 that moves vertically and is fixed vertically to the position. The other configuration is the same as that of the first embodiment.

  Therefore, when the linear motor 23 is driven and the piston 24 is moved up and down together with the outer rotor 16, the outer rotor 16 can be brought into contact with and separated from the plunger 13.

  Next, the operation of the electric nail driver 1 'according to the present embodiment will be described with reference to FIG.

  FIGS. 8A to 8F are broken side views showing the operation of the electric nail driver 1 ′ according to its driving procedure. In the initial state (non-operating state) shown in FIG. 10 and the trigger switch 9 are both in the OFF state, and the battery 4 is not energized from the outer rotor 16 and the linear motor 23, and these are in the non-operating state. Accordingly, the outer rotor 16 in the stopped state is separated from the plunger 13 as shown in the figure, and the plunger 13 is in the retracted position by the spring 14.

  Next, when the main power switch 10 is turned on as shown in FIG. 8B, the stator coil 22b (see FIGS. 2 and 5) of the outer rotor 16 is energized from the battery 4 via the motor rotation speed control circuit 30. Therefore, at the same time as the rotor 19 (see FIG. 2) of the outer rotor 16 starts to rotate, the linear motor 23 is energized, the piston 23 moves downward, and the outer rotor 16 is fixed in a state of being separated from the plunger 13. Therefore, in this state, the rotor 19 of the outer rotor 16 rotates idly while being separated from the plunger 13.

  When the trigger switch 9 is turned on as shown in FIG. 8C in the above state, the linear motor 23 is energized for a preset time (for example, 0.2 seconds), the piston 24 is moved upward, and the outer rotor 16 is moved. Since the outer rotor 16 is pressed against the lower surface of the plunger 13, the outer rotor 16 sandwiches the plunger 13 with the support roller 15. For this reason, a frictional force is generated between the rotor 19 (resin layer 21) of the rotating outer rotor 16 and the plunger 13, and the plunger 14 is synchronized with the rotational speed of the rotor 19 by this frictional force. The nail 5 is driven along the guide 6 as shown in FIG.

  Then, when a preset time (for example, 0.2 seconds) elapses, the energization to the linear motor 23 is switched and the piston 24 moves downward, and as shown in FIG. As shown in FIG. 8 (f), the plunger 13 is pulled back by the urging force of the spring 14 to return to the original initial position because the transmission of the driving force from the outer rotor 16 to the plunger 13 is interrupted. Then, the next nail 5 is loaded from the magazine 6 into the gap δ with the guide 6.

  After that, the plurality of nails 5 are continuously fired and driven continuously at the timing when the trigger switch 9 is turned on.

  Thus, in the present embodiment, the same effect as in the first embodiment can be obtained. However, in this embodiment, the moving means is composed only of the linear motor 23 and the arm used in the first embodiment is used. Since 25 (see FIG. 1) is omitted, the number of parts is further reduced, and an effect that further miniaturization, weight reduction, and cost reduction can be achieved.

<Embodiment 3>
Next, a third embodiment of the present invention will be described with reference to FIGS.

  9 and 10 are broken side views of the electric nail driver 1 "according to the present embodiment. In these figures, the same elements as those shown in FIG. Hereinafter, description thereof will be omitted.

  In the first and second embodiments, the configuration is adopted in which the support roller 15 is fixed and the outer rotor 16 opposed to the support roller 15 is moved via the plunger 13 so that the support roller 15 is moved toward and away from the plunger 13. In this embodiment, conversely, the outer rotor 16 is fixed and always brought into contact with the plunger 13, and the support roller 15 is moved (rotated) by the moving means so as to be brought into contact with and separated from the plunger 13. ing.

  That is, the linear motor 23 constituting the moving means is fixed vertically to the bottom of the housing 2, and the support roller 15 is rotatably pivoted at the tip of the arm 31 connected to the tip (upper end) of the piston 24 that moves up and down. I support.

  Thus, as shown in FIG. 9, in the initial state (non-operating state) in which both the main power switch 10 and the trigger switch 9 are in the OFF state, the support roller 15 is separated from the plunger 13, and the plunger 13 Is in the retracted position by a spring 14.

  Next, when the main power switch 10 is turned on, the stator coil 22b (see FIGS. 2 and 5) of the outer rotor 16 is energized from the battery 4, so the rotor 19 (see FIG. 2) of the outer rotor 16 starts to rotate. At the same time, the linear motor 23 is energized and the piston 24 is moved downward to fix the support roller 15 away from the plunger 13. Therefore, in this state, the rotor 19 of the outer rotor 16 rotates idly in contact with the plunger 13, and the plunger 13 is driven because the frictional force generated between them is smaller than the biasing force of the spring 14. Therefore, no nailing is done.

  When the trigger switch 9 is turned on as shown in FIG. 10 in the above state, the linear motor 23 is energized for a preset time (for example, 0.2 seconds), the piston 24 is moved upward, and the arm 31 is rotated. Since the support roller 15 is pressed by the plunger 13, the plunger 13 is sandwiched between the support roller 15 and the outer rotor 16. For this reason, a frictional force is generated between the rotor 19 (resin layer 21) of the rotating outer rotor 16 and the plunger 13, and the plunger 14 is synchronized with the rotational speed of the rotor 19 by this frictional force. The nail 5 is driven along the guide 8 by being pushed forward against the urging force.

  When a preset time (for example, 0.2 seconds) elapses, the energization to the linear motor 23 is switched, the piston 24 moves downward, and the support roller 15 is separated from the plunger 13. It is pulled back by the urging force of the spring 14 to return to the original initial position, and the next nail 5 is loaded from the magazine 6 into the gap δ with the guide 8.

  After that, the plurality of nails 5 are continuously fired and driven continuously at the timing when the trigger switch 9 is turned on.

  Thus, also in this embodiment, the same effect as in the first embodiment can be obtained.

<Other embodiments>
In the first to third embodiments, the outer rotor 16 formed by integrating the driving roller and the motor is used as the driving means for the plunger 13, but as shown in FIG. 11, the motor 32 and the driving roller (flywheel). 32 may be configured separately and the drive roller 33 may be configured to be concentrically attached to the output shaft 32a of the motor 32.

  Further, although the linear motor 23 is used as an actuator constituting the moving means, other arbitrary ones such as an electromagnetic solenoid can be used.

  In the above first to third embodiments, one support roller 15 is provided. However, a plurality of support rollers 15 may be provided. By providing a plurality of support rollers 15, the plunger 13 can be guided to the guide 8 more smoothly. In this case, the plurality of support rollers 15 may be arranged at any position on the movement track of the plunger 13.

  Further, in the first to third embodiments, the cordless electric nail driver 1 using the battery 4 as a power source has been described, but the present invention is also applied to an electric nail driver with a cord that supplies power from an outlet. The invention can be applied as well.

  In the first to third embodiments, a method of driving the plunger 13 by directly bringing the rotor 19 of the outer rotor 16 into contact with the plunger 13 is employed. However, the rotor 19 of the outer rotor 16 is not brought into contact with the plunger 13. A part that moves in synchronization with the plunger 13 is placed on the plunger 13, and this part is brought into contact with the outer peripheral surface of the rotor 19 of the outer rotor 16, and the plunger 13 is driven by the frictional force generated between them. Also good.

  The present invention can be applied to an electric nailing machine in which a nail is driven by a plunger that reciprocates in a housing using a motor as a drive source.

1 is a cutaway side view of an electric nail driver according to Embodiment 1 of the present invention. It is a fractured perspective view of an outer rotor. (A), (b) is sectional drawing of a linear motor. It is a perspective view which shows the structure of the moving means of the electric nail driver which concerns on Embodiment 1 of this invention. It is a block diagram which shows the structure of the control circuit of the electric nail driver which concerns on this invention. (A)-(f) is a fracture | rupture side view which shows the effect | action of the electric nail driver which concerns on Embodiment 1 of this invention according to the drive procedure. It is a fractured side view of the electric nail driver according to Embodiment 2 of the present invention. (A)-(f) is a fracture | rupture side view which shows the effect | action of the electric nail driver which concerns on Embodiment 2 of this invention according to the drive procedure. It is a fracture | rupture side view of the electric nail driver which concerns on Embodiment 3 of this invention. It is a fracture | rupture side view of the electric nail driver which concerns on Embodiment 3 of this invention. It is sectional drawing which shows another form of a drive means.

Explanation of symbols

1, 1 ', 1 "Electric Nailer 2 Housing 3 Handle 4 Battery 5 Nail 6 Magazine 8 Guide 9 Trigger Switch 10 Main Power Switch 13 Plunger 14 Spring 15 Support Roller 16 Outer Rotor (Motor)
19 Rotor 22 Stator 23 Linear motor (actuator)
24 Piston (actuator)
25 Arm 27 Arm shaft 29 Timer switch control circuit 30 Motor rotation speed control circuit 31 Arm 32 Motor 33 Driving roller (handwheel)
C1, C2 Coil S1, S2 Timer switch

Claims (8)

  A housing, a plunger that reciprocates in the housing and drives a nail, a support roller that supports the plunger, a motor that drives the plunger, and at least a part of the outer periphery of the stator that is driven by the motor and rotated An electric nail driver comprising: a driving roller that covers the driving roller; and a moving unit that moves the driving roller or the support roller to contact and separate the plunger.   2. An electric nail driver according to claim 1, wherein the rotational axes of the drive roller and the motor are aligned with each other.   The electric nail driver according to claim 1 or 2, wherein the driving roller is constituted by a rotor of the motor.   The moving means comprises an actuator having an actuator that reciprocates by electromagnetic force, and an arm that converts the reciprocating motion of the actuator of the actuator into a rotational movement of the drive roller or support roller. Item 4. The electric nailer according to Item 1.   The electric nail driver according to any one of claims 1 to 3, wherein the motor is disposed between the plunger and a handle.   6. The electric nail driver according to claim 5, wherein the motor is arranged so as to intersect each other in a state in which the rotation axis and the handle axis are projected on a plane perpendicular to the plunger moving direction. .   The electric nail driver according to claim 1, wherein the plunger is disposed between the support roller and the drive roller.   When the trigger switch is turned on, the moving means is driven to bring the support roller or the driving roller into contact with the plunger to perform nail driving. When a predetermined time has elapsed after the trigger switch is turned on, the moving means causes the support roller or The electric nail driver according to claim 1, wherein a driving roller is separated from the plunger.

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