JP4539296B2 - Nail feeding mechanism in nailing machine - Google Patents

Description

  The present invention relates to a nail feeding mechanism in a nailing machine in which electric power such as a battery or combustion gas is used as a driving source, and a driver is driven by these to drive nails, staples, and the like to be driven into a material to be driven.

  In general, compressed air driven nailers using compressed air as a power source are frequently used in construction sites. In such compressed air driven nailers, shaft portions are connected to each other by a flexible connector. A connecting nail wound in a coil shape is used. The connecting nail wound in a coil shape is loaded in a cylindrical magazine and guided along a nail supply guide formed between the magazine and the nose portion forming the injection port. To the injection port. The nail feeding mechanism for feeding the connecting nail into the injection port includes a feeding nail that engages with a nail shaft of the connecting nail arranged along the nail supply guide so as to reciprocate along the nail supply guide. The feed claw is reciprocated via a piston / cylinder mechanism driven by compressed air to supply the connecting nail into the injection port formed in the nose portion.

  The above-mentioned compressed air drive nailer requires an equipment such as an air compressor for generating compressed air for driving the nailer, and further, an air hose is used between the air compressor and the compressed air drive nailer. It is necessary to connect and supply compressed air to the compressed air drive nailer to perform the nailing operation. In order to eliminate the need for equipment such as an air compressor in such a compressed air driven nailer and to release the troublesome work while routing heavy air hoses, There are cases where an electric nail driver using an electric motor rotated by a battery as a power source or a gas-driven nailer using a combustion gas obtained by burning a combustible gas as a power source may be used. In such an electric nailing machine and a gas driven nailing machine, generally, a connecting nail connected in a straight shape is loaded into a straight magazine having a front end connected to a nose portion, and the magazine is placed in the magazine. A nail supply mechanism that employs a pusher member arranged to push and urge the last nail of the connecting nail forward to supply the first nail into the injection port of the nose portion is employed.

In order to use a connecting nail that is connected by a flexible connecting body and wound in a coil shape with an electric nail driver or a gas-driven nail driver that does not have a driving source by compressed air, A nail feed member is disposed so as to be reciprocally movable along a nail supply guide that is guided into the injection port, and the nail feed member is biased by a spring so as to be disposed at a front end position in a normal state, thereby forming an injection port. The contact member is slid along the nose portion and the nail feed member is linked to slide the contact member by pressing the nose portion against the driven material for nailing operation. By operating the contact member, the feed member is actuated rearward against the spring force along the nail supply guide, and the contact member is released to move the nail feed member to the spring. Nail feed mechanism by the electric nailer the connected nails to be supplied to the nose portion has been proposed advanced by.
Japanese Utility Model Publication No. 62-1878

  In order to supply the nail that is connected by the flexible connecting body and wound in the coil shape into the injection port of the nose portion, it is usually necessary to operate the feeding member with a driving force of about 4 kg. In the nail driver, the spring force that presses and urges the feed member engaged with the nail shaft of the connecting nail in the direction of supplying the nail is set to be substantially the same as the driving force, and the feed member is operated by operating the contact member. Since the contact member is operated against the spring force, the pressing load of the contact member is increased, and the contact member is slid for each driving operation, so that the operability is deteriorated. Also. Even if the operation stroke of the contact member is set large in order to reduce the operation load, the operability of the contact member is deteriorated. Furthermore, the nailing machine may be used for the construction of roof materials coated with tar, such as asphalt roofing, and the asphalt adheres to the sliding parts of contact members and nail feeding members to further increase the sliding resistance. Thus, the contact member and the nail feed member may become inoperable.

  It is also possible to operate the nail feed member operated linearly along the nail supply guide by a solenoid that can be driven by a battery mounted on the nail driver. With a solenoid that is large enough to be mounted, the driving force is too small, and a load for operating the feed member for supplying the connecting nail cannot be obtained, so that the nail cannot be supplied. Further, if the solenoid is made larger, the nailing machine becomes larger and workability is impaired.

  The present invention provides a nail feeding mechanism in a nailing machine for supplying a connection nail wound in a coil shape into an injection port of a nose portion, which can be used in a nail driving machine having no power source for compressed air. This is the issue.

In order to solve the above problems, a nail feeding mechanism in a nailing machine according to the present invention accommodates an operating member in which a driver portion for hitting a nail is formed and a driving mechanism for driving the operating member in a straight line. A body, a nose part attached to the lower part of the body and forming an injection port for receiving and guiding the driver part, and a magazine for receiving a connecting nail connected to the nose part and connected to each other A nail supply guide formed between the injection port of the nose part and the magazine, and a nail supply mechanism for sequentially supplying the connecting nails accommodated in the magazine into the injection port of the nose part along the supply guide The nail supplied into the injection port of the nose portion by the nail supply mechanism is struck by a driver unit driven by the drive mechanism and driven out from the injection port. In the nailing machine according to the present invention, the nail supply mechanism includes a slider that is reciprocally supported along a nail supply direction of a nail supply guide of the nose portion, and a slider that is rotatably supported by the slider. A feed member formed with a feed claw capable of being engaged with a nail shaft of a connecting nail disposed along a nail supply guide, and a drive cam provided on the body side and driven to rotate by using an electric motor as a power source The slider has a pair of engagement pieces formed at intervals along the operation direction of the slider, the drive cam is disposed between the pair of engagement pieces , The slider is reciprocated by rotation to reciprocate the feed member along the nail supply guide, whereby the nails on the nail supply guide are sequentially supplied into the injection port .

  According to the present invention, the nail supply mechanism is supported by the slider so as to reciprocate along the supply direction of the nail of the nail supply guide of the nose portion, and is supported by the slider so as to be rotatable. A feed member formed with a feed claw that can be engaged with a nail shaft of a connecting nail arranged along a supply guide, and a drive cam that is provided on the body side and is driven to rotate using an electric motor as a power source By disposing the drive cam between a pair of engagement pieces formed on the slider at intervals along the operation direction of the slider, the slider is reciprocated by the rotation of the drive cam. The feed member is reciprocated along the nail supply guide via the slider so that the nail on the nail supply guide is sequentially supplied into the injection port. The drive cam is rotated by an electric motor driven by a battery or the like, and the feed member engaged with the connecting nail can be reciprocated by the drive cam. It is possible to supply a connecting nail that is connected by a flexible connecting body and wound in a coil shape in a machine, a gas driven nail driver, or the like without impairing operability.

  In addition, the nose portion is formed with an operating portion composed of a slider and a feed member that easily adheres tar by a nailing operation, and includes an electric motor and a drive cam that drive the feed operation portion of the nose portion. A drive portion formed on the body side, the nose portion being removable from the body, and the drive cam being disposed between a pair of engagement pieces formed on the slider, by rotating the drive cam. Since the slider is reciprocated, when cleaning the tar adhering to the periphery of the nose part, the parts on the drive part side such as an electric motor, which may impair the performance by the cleaning liquid, remain on the body side. The nose portion can be removed from the body and the periphery of the nose portion can be cleaned. Further, when the removed nose portion is assembled to the body, the drive cam formed on the body side and the slider formed on the nose side can be easily assembled.

  An object of the present invention is to provide a nail supply mechanism that can be used in a nailing machine that does not have a power source of compressed air and that supplies a connection nail wound in a coil shape into an injection port of a nose portion. A nail supply mechanism is supported so as to be reciprocally movable along a nail supply direction of the nail supply guide of the nose portion, and is supported by the slider so as to be rotatable and disposed along the nail supply guide. The slider comprises: a feed member formed with a feed claw capable of engaging with a nail shaft of the connecting nail; and a drive cam provided on the body side and driven to rotate by using an electric motor as a power source. By disposing the drive cam between a pair of engaging pieces formed at intervals along the direction, the slider is reciprocated by the rotation of the drive cam, and the slider is interposed through the slider. Ri member by reciprocating along the nail supply guide, which was achieved by supplying to sequential injection mouth nail on the nail supply guide will be described in more specific embodiments below.

  1 to 3 show an electric nailing machine 1 as an example of a nailing machine in which a nail supply mechanism according to the present invention is implemented. The electric nailing machine 1 has a grip portion 3 facing rearward. A body 2 that is integrally connected is provided, and a guide cylinder 6 that slides and guides an operating member 4 that integrally forms a driver portion 5 for hitting a nail is formed on the body 2. The operating member 4 is supported in the guide cylinder 6 so as to be slidable on a straight line. Further, a nose portion 7 forming an injection port 8 for guiding the nail to the driven material is attached to the lower end of the body 2, and a large number of nails are accommodated on the rear side of the nose portion 7. Magazines 9 connected to each other. The nail accommodated in the magazine 9 is guided and guided from the magazine 9 into the injection port 8 of the nose portion along a nail supply guide 10 formed between the magazine 9 and the nose portion 7.

  A piston portion 4 a is formed at the upper end of the actuating member 4, and this piston portion 4 a is accommodated in a guide cylinder 6 formed in the body 2, and is lowered along the guide cylinder 6 from the top dead center position. It is slidably guided between the dead center positions. The driver portion 5 formed at the lower end of the operating member 4 is accommodated in an injection port 8 formed in the nose portion 7 and guided so as to be slidable in the injection port 8. It engages with a nail supplied in 8 and strikes the nail so that it is ejected from the tip of the injection port 8. A piston stop 11 made of an elastic material such as rubber is disposed at the upper end of the guide cylinder 6, and when the operating member 4 is operated toward the top dead center position, the piston portion is located at the top dead center position. The operating member 4 is buffered by coming into contact with 4a. Further, a bumper 12 made of an elastic material such as rubber is disposed at the lower end portion of the guide cylinder 6, and surplus energy of the operating member 4 driven in the direction of the bottom dead center is used as a bumper on the lower surface of the piston portion 4a. 12 so as to be buffered.

  Further, the electric nail driver 1 is provided with a drive mechanism 13 for driving the operating member 4 linearly along the guide cylinder 6. The drive mechanism 13 includes a flywheel 14 that is frictionally engaged with the operation member 4 to linearly operate the operation member 4, an electric motor 15 that is rotated by electric power that rotationally drives the flywheel 14, and the electric motor The rotation transmission mechanism (not shown) that transmits the rotation of 15 to the flywheel 14 and the link frame 16 that holds the flywheel 14, the electric motor 15, and the rotation transmission mechanism.

  The flywheel 14 is rotatably supported at the lower end of the link frame 16 such that the outer peripheral surface of the flywheel 14 faces the rear surface of the actuating member 4, and the electric motor 15 is linked to the link frame 16. It is held by a support frame 17 that is installed on the frame. The direction of the output shaft of the electric motor 15 is reversed by 90 degrees by a rotation transmission mechanism (not shown) and transmitted to the flywheel 14, and power is supplied to the electric motor 15, thereby supplying the flywheel via the rotation transmission mechanism. 14 is rotated.

  The link frame 16 is rotatably supported by the body 2 of the electric nailer 1 by a pivotal support 18 close to the lower end holding the flywheel 14, and the link frame 16 supports the pivotal support 18. The flywheel 14 held by the link frame 16 is brought into contact with or separated from the rear side surface of the operating member 4 by rotating around the center. The link frame 16 is normally urged to rotate in a direction in which the flywheel 14 is separated from the operating member 4 by a spring 19. When the upper end portion of 16 is pressed, the flywheel 14 is rotated in a direction in which the flywheel 14 is pressed against the operating member 4 against the urging force of the spring 19.

  An idle roller 21 is provided on the front surface of the actuating member 4 that is frictionally engaged with the flywheel 14 so that the outer peripheral surface is in contact with the front surface of the actuating member 4. The driver portion 5 formed below the operation member 4 is guided and guided toward the injection port 8 formed in the nose portion 7 by the outer peripheral surface of the idle roller 21. When the link frame 16 is rotated about the pivot 18 and the flywheel 14 held by the link frame 16 is pressed against the rear surface of the operation member 4, the front surface of the operation member 4. Is engaged with the idler roller 21, the operation member 4 is sandwiched between the idler roller 21 and the flywheel 14, and the outer peripheral surface of the flywheel 14 is pressed into contact with the rear side surface of the operation member 4. The rotational force 14 is transmitted to the actuating member 4 by frictional force, and the actuating member 4 is driven on a straight line.

  The nail used in the electric nail driver 1 is formed as a connecting nail in which shaft portions are arranged in parallel at predetermined intervals and the shaft portions of each nail are connected by a flexible connecting body. The connecting nail obtained by winding the connecting nail in a spiral shape is loaded into the magazine 9, and the connecting nail pulled out from the magazine 9 is guided along the nail supply guide 10 to enter the injection port 8 of the nose portion 7. It is guided to. A nail supply mechanism 22 for sequentially supplying the connecting nails along the nail supply guide 10 toward the nose portion 7 is provided.

  The nail supply mechanism 22 is formed with a feed claw 24 that engages with a nail shaft disposed along the nail supply guide 10 and propels the connecting nail engaged with the feed claw 24 toward the nose portion 7. The feed member 23 is slid with respect to the nose portion 7 so that the feed member 23 is rotatably held at one end side and the feed member 23 can reciprocate along the nail supply guide 10 of the nose portion 7. The supported slider 25, the drive cam 26 that reciprocates the slider 25 along the nail supply guide 10, the electric motor 27 that rotationally drives the drive cam 26, and the rotation of the electric motor 27 that drives the drive The rotation transmission mechanism 28 is configured to transmit the rotation to the cam 26.

  As shown in FIGS. 4 and 5, a door 29 is disposed so as to face the nail guide surface of the nail supply guide 10 of the nose portion 7 with a space therebetween, and the door 29 and the guide of the nail supply guide 10 are arranged. A nail feeding path 30 for guiding the connecting nail from the magazine 9 to the injection port 8 is formed between the surfaces. The door 29 is supported by the nose portion 7 through a hinge portion 31 so as to be openable and closable. When the leading nail of the connecting nail loaded in the magazine 9 is set into the injection port 8, the nail feeding path 30 is formed. It can be opened. Further, the door 29 is normally locked at a position where the nail feeding path 30 is formed by a latch mechanism 32.

  A part of the slider 25 is accommodated in a guide groove 33 formed along the feeding direction of the connecting nail on the back side of the nail supply guide 10 formed in the nose portion 7. 33 is supported by the nose portion 7 so as to be slidable along the connecting nail supply direction, and the feed member 23 is rotatably held by a pin 34 at the front end portion of the slider 25. At the front end of the feed member 23, two rows of feed claws are formed along the feed direction of the connecting nail. The feed claws can be engaged with the shaft portion of the nail disposed in the nail supply guide 10. The two feed claws 24a, The nail shaft portion of the connecting nail is accommodated between 24 b and the nail is propelled toward the nose portion 7 to supply the connecting nail toward the injection port 8 of the nose portion 7.

  The feed member 23 is urged to rotate about the pin 34 by a spring 35 disposed between the slider 25 and an opening formed in the nail supply guide 10 as shown in FIG. From 36, the tip of the feed member 23 advances into the nail feed path 30 so that it can engage with a nail shaft disposed in the nail feed path 30.

  As shown in FIGS. 3, 4, and 7, the drive cam 26, the electric motor 27, and the rotation transmission mechanism 28 are a pair of support substrates 37 a that are attached to the side surface of the body 2 and are spaced apart from each other. , 37b. A driving gear 38 is formed on the driving cam 26 integrally with the driving cam 26, and is rotatably supported by a lower portion of the supporting substrates 37a and 37b between the pair of supporting substrates 37a and 37b. The electric motor 27 is attached to the outer surface of the one support substrate 37a, and the output shaft 27a of the electric motor 27 is disposed between the pair of support substrates 37a and 37b. The rotation transmission mechanism 28 includes a plurality of reduction gear groups 40 that transmit rotation between a gear 39 attached to the output shaft 27 a of the electric motor 27 and a drive gear 38 formed on the drive cam 26. The drive cam 26 is rotated by decelerating the rotation of the electric motor 27.

  As shown in FIGS. 4 and 8, the side surface of the slider 25 slidably supported with respect to the nose portion 7 is spaced in the sliding operation direction so as to be orthogonal to the sliding operation direction of the slider 25. A pair of engaging pieces 41, 42 are formed opposite to each other, and the drive cam 26 held by the support substrate 37 on the body 2 side in a state where the nose portion 7 is assembled to the body 2. The positions are set so as to be disposed between the engagement pieces 41 and 42. As shown in the drawing, the drive cam 26 is formed on a cam surface whose outer peripheral surface is eccentric from the rotation center axis. When the drive cam 26 rotates once, the engagement pieces 41 and 42 are connected to the drive cam 26. Engaging with the cam surface, the slider 25 is slid in one reciprocation along the nail supply direction, and the slider 25 is slid to reciprocate along the nail feeding path 30 to move the nail feeding path 30. The connecting nail arranged inside is fed in the direction of the nose portion 7, and the leading nail of the connecting nail is supplied into the injection port 8.

  The operation of driving a nail by the electric nail driver 1 will be described below. The electric nailer 1 is activated by operating a trigger lever 43 formed at the base of the grip portion 3 with a finger holding the grip portion 3. In an initial state in which the trigger lever 43 is not operated, the flywheel 14 is separated from the operating member 4, and the operating member 4 and the driver unit 5 are disposed at the top dead center position. At this time, the leading nail of the connecting nail supplied by the previous operation is disposed in the injection port 8 of the nose portion 7.

  The activation switch 44 detects that the trigger lever 43 has been operated, electric power is supplied to the electric motor 15 of the drive mechanism 13, the electric motor 15 is rotationally driven, and the flywheel 14 is rotationally driven. At this time, since the solenoid 20 is not energized yet, the outer peripheral surface of the flywheel 14 is rapidly driven to a predetermined rotational speed without contacting the operating member 4. The rotational speed of the flywheel 14 is detected by a rotation sensor or the like, and is driven by a driver unit 5 driven by the flywheel 14 until it reaches a rotational speed that stores sufficient inertial energy to strike a nail.

  When it is detected that the flywheel 14 has reached a predetermined number of revolutions, the solenoid 20 is energized, and the solenoid 20 rotates the link frame 16 about the pivot 18 in the clockwise direction. The wheel 14 is brought into pressure contact with the rear surface of the operating member 4. Since the idle roller 21 is in contact with the front surface of the operation member 4, the operation member 4 is sandwiched between the idle roller 21 and the flywheel 14, and a large frictional force is generated between the flywheel 14 and the operation portion 4. Cause it to occur. By this frictional force, the operating member 4 is driven in the direction of the bottom dead center and the nail supplied into the injection port 8 of the nose portion 7 is hit by the driver portion 5 formed below the operating member 4 to hit the nose portion. 7 is driven into the workpiece to be placed at the tip of 7.

  After the actuating member 4 and the driver unit 5 are driven to the bottom dead center position, the energization to the solenoid 20 is cut off, and the link frame 16 is rotated counterclockwise by the spring 19 to move the flywheel 14 to the actuating member 4. Move away from the rear surface of the. After that, after energizing the electric motor 15 is cut off once and the electric motor 15 is stopped, electric power of reverse polarity is supplied to the electric motor 15 to rotate the electric motor 15 in the reverse direction to move the flywheel 14 in the reverse direction. To rotate. After detecting that the rotation of the flywheel 14 has reached a predetermined number of revolutions, the solenoid 20 is energized again and the link frame 16 is rotated to bring the flywheel 14 back to the rear surface of the actuating member 4. The operating member 4 is driven in the direction of the top dead center by a friction force between the flywheel 14 and the operating member 4 by pressure contact, and the electric motor 15 is detected by the switch 45 detecting that the operating member 4 has returned to the top dead center. Shut off the power to the unit and return to the initial state.

  Next, the operation of the nail supply mechanism 22 implemented in the electric nail driver 1 will be described. Before the electric nailer 1 is started, as shown in FIGS. 5 and 8, the drive cam 26 disposed between a pair of engaging pieces 41 and 42 formed on the back surface of the slider 25. Thus, the slider 25 is disposed at the front end position of the sliding stroke, and the feed member 23 held by the slider 25 is also disposed at the front end position of the operating range. The feed member 23 is rotated by a spring 35 so that feed claws 24a and 24b formed on the feed member 23 advance into the nail feed path 30, and the nail feed path is between these feed claws 24a and 24b. The shaft portion of the second nail N2 from the top of the connecting nail arranged in the 30 is engaged, and the top nail N1 of the connecting nail is supplied into the injection port 8 of the nose portion 7.

  In the nail supply mechanism 22, the operation member 4 is driven by a flywheel 14 that is driven to rotate when the electric nail driver 1 is activated, and the driver portion 5 formed in the operation member 4 enters the injection port 8. The state where the feed member 23 is disposed at the front end position of the operating range is maintained until the nail N1 disposed is struck and driven out from the injection port 8. Thus, the vertical surface formed on the front surface of the feed claw 24a formed on the front side of the feed member 23 is arranged so as to block the opening of the injection port 8 directed toward the nail feed path 30 side. Thus, the nail N1 hit by the driver unit 5 and driven out from the injection port 8 is prevented from jumping out to the nail feeding path 30 side.

  After the operation member 4 is driven to the bottom dead center and the driving of the nail by the driver unit 5 is completed, the operation member 4 is returned to the top dead center position by the flywheel 14 rotated in the reverse direction. After the actuating member 4 is actuated to the top dead center position, electric power is supplied to the electric motor 27 of the nail supply mechanism 22 to rotate the electric motor 27. The electric motor 27 includes a plurality of reduction gears 40, 40, 40 formed between a gear 39 attached to the output shaft 27 a and a drive gear 38 formed integrally with the drive cam 26. The drive cam 26 is rotationally driven via the rotation transmission mechanism 28.

  When the drive cam 26 rotates, the rear engagement piece 42 formed on the slider 25 engages with the outer peripheral surface of the drive cam 26 to move the slider 25 rearward. Accordingly, the feed member 23 moves rearward along the nail feed path 30. When the feed member 23 engaged with the shaft portion of the second nail N2 arranged in the nail feed path 30 moves rearward, as shown in FIG. An inclined surface formed at the rear of the feed claw 24a formed on the hook engages with the second nail N2 and gets over the nail N2, and the feed claw 24b formed on the rear side of the feed member 23 As the slope formed on the rear surface engages with the shaft portion of the third nail N3 of the nail feeding path 30, the tips of the feeding claws 24a and 24b are retracted from the nail feeding path 30. The feed member 23 is rotated around the pin 34. During this time, a check nail (not shown) is engaged with the connecting nail disposed in the nail feed path 30, and the feed member 23 engaged with the nail shaft moves to the rear side. The connecting nail is prevented from moving backward.

  As shown in FIGS. 9 and 11, when the slider 25 is further moved rearward by the drive cam 26 and operated to the rear end position of the sliding stroke of the slider 25, the feed pawl 24b formed on the rear side is formed. Over the shaft of the third nail N3 of the connecting nail in the nail feeding path 30 and is arranged on the rear side of the third nail N3, and the feed claw 24a formed in front of the feed member 23 and the rear The third nail N3 is engaged between the feed claws 24b.

  Further, when the engagement piece 41 formed on the back surface of the slider 25 is engaged with the outer peripheral surface of the drive cam 26 by the rotation of the drive cam 26, the slider 25 is slid forward and the slider 25 is activated. Thus, the feed member 23 is actuated forward. As described above, when the feed member 23 engaged with the third nail N3 of the connecting nail in the nail feeding path 30 is operated to the front end position, the connecting nail moves forward in the nail feeding path 30. The second nail is fed into the injection port 8 after being transferred. As described above, when the driving cam 26 operating the feed member 23 completes one rotation so that the nail to be driven next is supplied into the injection port 8 by the feed member 23, the electric motor 27 is moved to the electric motor 27. Is cut off and the electric motor 27 is stopped.

  In the above embodiment, the start switch 44 is operated by operating the trigger lever 43, and a trigger ON signal is output from the start switch 44, and the operating member 4 is operated by the ON signal as described above, and the driver unit 5 The nail feeding mechanism 22 is operated by energizing the electric motor 27 of the nail feeding mechanism 22 after the nail driving process is finished and immediately before the operating member 4 is returned to the top dead center position or just before being returned. However, as a mechanism for operating the nail supply mechanism 22 in this way, the electric motor 27 is energized after a predetermined time set by the timer means or the like from the trigger ON signal, or the operating member 4 or the driver unit. The electric motor 27 is energized by a detection signal from the switch 45 that detects that the motor 5 has returned to the top dead center position. It can be carried out by.

  Further, as a means for stopping the electric motor 27 that rotates the driving cam 26 when the driving cam 26 makes one rotation, the driving cam 26 or the driving gear 38 formed on the driving cam 26 is made to correspond. This can be implemented by installing a sensor or the like for detecting the origin position and shutting off the power supply to the electric motor 27 by a detection signal from the origin detection sensor.

  According to the electric nailing machine 1 of the above embodiment, the nose portion 7 is formed with the feed operating portion composed of the slider 25 and the feed member 23, which are likely to cause functional failure due to tar adhesion due to the nailing operation. A feed drive unit including an electric motor 27 and a drive cam 26 for driving the feed operation unit of the nose unit 7 is formed on the body 2 side, and the nose unit 7 can be detached from the body 2 and the feed The drive cam 26 of the drive unit and the pair of engagement pieces 41 and 42 formed on the slider of the feed operation unit can be easily combined, and the tar adhering to the periphery of the nose unit 7 is cleaned during the nail driving operation. The nose portion 7 is removed from the body 2 while leaving the parts such as the electric motor 27, etc., whose performance may be impaired by the cleaning liquid left on the body 1 side. It can be cleaned edges. Further, when the removed nose portion 7 is assembled to the body 2, the drive cam 26 formed on the body 2 side and the engagement pieces 41 and 42 formed on the slider 25 formed on the nose side 7 are assembled. Can be easily performed.

  In the above-described embodiment, after the operation member 4 that has finished the nail driving operation is returned to the initial top dead center position, power is supplied to the electric motor 27 of the nail supply mechanism 22 to rotate the drive cam. After the drive cam 26 rotates once and the nail supply mechanism 22 completes a series of nail feeding operations, the electric motor 27 is turned off and the electric motor 27 is stopped. In order to shorten one cycle time of the nail driving operation of the nail driver 1, the electric motor of the nail supply mechanism 22 is operated simultaneously with the operation of returning the operating member 4 that has completed the nail driving operation to the initial top dead center position. 27, the drive cam 26 is rotated halfway by rotating the drive cam 26, the feed member 23 is moved to the rear side, the feed claws are temporarily stopped at the positions where the next claws 24a and 24b are engaged, and the operation member 4 is After returning to the initial top dead center position May be to move the drive cam 26 by energizing the electric motor 27 again member 23 feed by remaining half turns revolution forwardly to supply a nail into the injection hole 8.

  Furthermore, in the above-described embodiment, the electric motor 27 is installed so that the direction of the rotation axis of the electric motor 27 is horizontal, and the final drive gear 38 is rotated via the reduction gear 40 composed of a plurality of flat cars. However, it is possible to install the electric motor so that the direction of the output shaft of the electric motor is substantially parallel to the grip portion 3, and the electric motor can be installed vertically. Thus, the width direction dimension of the tip portion of the nose portion 7 can be formed small, the visibility of the nail-punched portion is improved, and the nail driving workability can be improved. When the electric motor is arranged in the vertical direction, the drive cam 26 is rotated by using a helical gear or the like to reverse the direction of the rotating shaft by 90 degrees and transmitting it to the drive gear 38. To do.

1 is a longitudinal side view showing an electric nail driver implementing a nail supply mechanism according to an embodiment of the present invention. Bottom view of the same electric nailer as in FIG. The front view which shows the nose part of the same electric nailer as FIG. Sectional drawing on the AA line in FIG. Sectional drawing on the BB line in FIG. Sectional drawing on the CC line in FIG. Sectional drawing on the DD line in FIG. Side view of the same nose as in FIG. Side view of the same nose portion as in FIG. 8 with the drive cam half-turned The same sectional view as FIG. 5 showing a state in which the feed member is operated to the rear side Same sectional view as FIG. 5 showing a state in which the feed member is operated to the rear end position The same sectional view as FIG. 5 showing the state where the feed member is again moved to the front end position.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electric nail driver 2 Body 4 Actuating member 4a Piston part 7 Nose part 8 Injection port 9 Magazine 10 Nail supply guide 22 Nail supply mechanism 23 Feed member 24a, 24b Feed claw 25 Slider 26 Drive cam 27 Electric motor 28 Rotation transmission mechanism

Claims (1)

A body housing an operating member formed with a driver portion for striking a nail and housing a driving mechanism for driving the operating member in a straight line; and a body mounted below the body and housing the driver portion A nose part forming an injection port for guiding, a magazine connected to the nose part and containing the connecting nails connected to each other, and a nail formed between the injection port of the nose part and the magazine A supply guide and a nail supply mechanism for sequentially supplying the connecting nail accommodated in the magazine into the injection port of the nose portion along the supply guide, and supplied to the injection port of the nose portion by the nail supply mechanism In the nailing machine in which a nail is struck by a driver portion driven by the drive mechanism and driven out from an injection port, the nail supply mechanism is configured to nail the nose portion. A slider supported in a reciprocating manner along the nail supply direction of the feed guide, and supported by the slider so as to be rotatable and engageable with a nail shaft of a connecting nail arranged along the nail supply guide. And a drive cam provided on the body side and driven to rotate by using an electric motor as a power source, the slider being spaced apart along the operation direction of the slider. A pair of engagement pieces formed, the drive cam is disposed between the pair of engagement pieces, and the slider is reciprocated by rotation of the drive cam to move the feed member along the nail supply guide. The nail feeding mechanism in the nail driver is characterized in that the nail on the nail supply guide is sequentially supplied into the injection port by reciprocally operating .

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