JP2011025362A - Driving tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a technique for reducing a moment received by an operator during a driving operation of a fixing member and preventing the fixing member from rising in a driving tool. <P>SOLUTION: The driving tool includes a battery 110, a motor 111, a first cylinder 131, a first piston 133 reciprocating in the first cylinder 131 to generate compressed air, a second cylinder 121 arranged in parallel with the first cylinder 131, a second piston 123 moving in the second cylinder 121 to drive the fixing member, a long handle 103 extending in a direction intersecting central axes of the first and second cylinders 131 and 121 and a magazine 105 for supplying the fixing member. In the handle 103, a driving operation part 103a which can be operated by an operator is provided. The driving operation part 103a is arranged on the same plane as a surface of a center of gravity passing a center of gravity of the driving tool having the battery 110 attached and extending in parallel with the central axis of the second cylinder 121 or nearer to the second cylinder side than to the surface of the center of gravity. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an electro-pneumatic driving tool for driving a stopper such as a nail into a workpiece.

As an example of a conventional electro-pneumatic driving tool, for example, Japanese Patent No. 3676879 (Patent Document 1) describes an electro-pneumatic nailing machine. The nailing machine described in Patent Document 1 includes an electric motor driven by electric power supplied from a battery. Then, the air in the cylinder is compressed by forcibly moving the striking piston backward by motor driving, and then the striking piston is moved forward by the compressed air compressed, A nail as a stopper is driven into a workpiece by a driver that moves with the piston.
According to the electro-pneumatic nailer configured as described above, a power cord for supplying power from an external power source and an air hose for supplying compressed air from an external air supply source are unnecessary, and work is easy. You can get the advantages.

  When nails are driven by a nail driver, the nail driver reacts in the opposite direction to the driver's nail driving direction, and the moment caused by this reaction (hereinafter referred to as the reaction moment) grips the nailer handle. Acts on the fingers. In the case of the conventional electro-pneumatic driving tool described above, the position of the trigger is structurally located below the center of gravity of the driving tool. Therefore, the tip of the nail driver is caused by the reaction moment generated when nailing. There is a possibility of causing a phenomenon that the end portion (head) of the nail protrudes from the surface of the workpiece, that is, a nail lift, easily leaving the workpiece. In order to prevent such nail lifting, the operator needs to strongly press the handle toward the workpiece.

Japanese Patent No. 3676879

  In view of the above-described problems, an object of the present invention is to provide a technique that contributes to prevention of lifting of a stopper by reducing a moment received by an operator when the stopper is driven.

  In order to achieve the above object, preferred embodiments of the driving tool according to the present invention include a battery, a motor driven by electric power supplied from the battery, a first cylinder, and a reciprocating motion within the first cylinder driven by the motor. A first piston that generates compressed air by moving, a second cylinder that is arranged in parallel with the first cylinder, a sliding portion that is slidably accommodated in the second cylinder, and the sliding portion. And a second piston having a long driving portion for driving the stopper, a long handle extending in a direction crossing the central axis direction of the first cylinder and the second cylinder, and a stopper. And a magazine for feeding onto the driving operation line of the driving portion of the two pistons. Then, the compressed air in the first cylinder generated by the first piston is supplied into the second cylinder, the second piston is moved linearly by the compressed air, and the stopper is moved by the driving portion of the second piston. It is set as the structure which performs the driving | operation operation | work of. The “driving tool” in the present invention typically corresponds to a nailing machine or a tucker, and the “stopper” is a straight bar having a pointed tip and is attached to the head. Widely includes those having or not having a shade and U-shaped staples.

  According to a preferred embodiment of the driving tool according to the present invention, as a characteristic configuration, the handle is provided with a driving operation unit that can be operated by an operator for energizing and driving the motor, and the driving operation unit includes: It is arranged on the same plane as the center of gravity extending parallel to the central axis of the second cylinder through the center of gravity of the driving tool with the battery mounted or on the second cylinder side of the center of gravity. In addition, the term “arranged on the same plane” in the present invention includes not only modes arranged on the same plane but also modes arranged almost on the same plane.

  According to the present invention, the driving operation unit is disposed on the same plane as the center of gravity extending through the center of gravity of the driving tool and parallel to the central axis of the second cylinder, or on the second cylinder side from the center of gravity. Yes. For this reason, when the operator grips the handle and operates the driving operation unit while applying a pressing force toward the workpiece to the driving tool to perform the driving operation on the workpiece of the stopper, It is possible to push the vicinity of the driving axis of the handle (near the striking axis). As a result, the reaction moment received by the operator (palm) at the time of driving the stopper is reduced, and it is easy to suppress the separation (lifting) of the driving tool from the workpiece, which is effective in preventing the stopper from floating.

  According to the further form which concerns on this invention, the driving operation part is arrange | positioned between the gravity center surface and the center axis | shaft of a 2nd cylinder. When arranged in this manner, the handle can be pushed at a position closer to the driving axis, and the effect of reducing the reaction moment and the effect of preventing the lifting of the stopper can be further improved.

  According to the further form which concerns on this invention, when the side into which a stopper is driven is defined as the front and the opposite side is defined as the rear, the handle and the driving operation portion provided on the handle are the second cylinder and / or the second It is arranged behind one cylinder. By adopting such a rear arrangement, it is possible to arbitrarily set the position of the driving operation unit, and thus the handle position, without being restricted by the position of the second cylinder and / or the first cylinder.

  According to the further form which concerns on this invention, the 1st cylinder is arrange | positioned so that the center axis | shaft of the said 1st cylinder may be located between the center axis | shaft of a 2nd cylinder, and a gravity surface. The driving operation unit is disposed between the central axis of the first cylinder and the central axis of the second cylinder. By adopting such an arrangement, the driving operation unit can be arranged closer to the driving operation line.

  According to the further form which concerns on this invention, when the side into which a stopper is driven is defined as the front and the opposite side is defined as the rear, the handle is disposed behind the second cylinder and the first cylinder and extends. One end portion in the extending direction is connected to the rear end portion of the second cylinder, and the other end portion in the extending direction is connected to the rear end portion of the first cylinder. According to the present invention, it is possible to configure a generally D-shaped handle in a side view in which two end portions in the extending direction are connected to the rear end portion of the first cylinder and the rear end portion of the second cylinder. Can be increased.

  According to the further form which concerns on this invention, when the supply side of the fastener of a magazine is set to upper direction and the other side is set to the downward direction, a battery is such that the said battery rear end is higher than the rear end of a magazine. Has been placed. The battery is a product that is heavier than, for example, a magazine among the components constituting the driving tool. According to the present invention, the rear end of the battery heavier than the magazine is disposed above the rear end of the magazine, so that the center of gravity position of the driving tool can be brought closer to the driving axis, thereby This is effective in reducing the reaction moment during driving.

  According to the present invention, in the driving tool, a technique is provided that contributes to preventing the lifting of the stopper by reducing the moment received by the operator when the stopper is driven.

It is sectional drawing which shows the whole structure of the nail driver which concerns on embodiment of this invention, and shows the state before driving in a nail. It is sectional drawing which shows the whole structure of the nail driver which concerns on embodiment of this invention, and shows the time of nailing operation | movement.

  Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 1 and 2. This embodiment will be described using an electro-pneumatic nailing machine as an example of an electro-pneumatic driving tool. As shown in FIG. 1, the nailing machine 100 generally includes a main body 101 as a tool main body, a handle 103 held by an operator, and a nail n as a stopper to be driven into a workpiece. The magazine 105 is mainly loaded. The handle portion 103 extends in a direction intersecting the major axis direction of the main body portion 101 (the left-right direction in the drawing) and is connected to the main body portion 101, and on one end side (the right side in the drawing) in the extending direction, A rechargeable battery pack 110 serving as a power source for the drive motor 111 is mounted. FIG. 1 shows a state in which the nailing machine 100 faces downward, that is, a state in which the distal end portion (lower end portion in the drawing) of the main body 101 is directed to the workpiece. For this reason, the downward direction in FIG. 1 is the driving (launching) direction (major axis direction) of the nail n, which is the direction in which the driver 125 hits the nail n. For convenience of explanation, the front end side (lower side in the drawing) of the main body 101 is referred to as the front, and the opposite side (the handle portion 103 side) is referred to as the rear. In addition, the mounting side of the battery pack 110 in the handle portion 103 is referred to as “down” (right side in the drawing), and the opposite side is referred to as “upper” (right side in the drawing). The handle portion 103 corresponds to the “handle” in the present invention.

  The main body 101 is mainly composed of a main body housing 107 in which a striking cylinder 121 of the nail driving mechanism 120 and a compression cylinder 131 of the compression device 130 are integrally formed, and a motor housing 109 in which a drive motor 111 is accommodated. Is done. The handle portion 103 is disposed behind the main body housing 107, that is, behind the striking cylinder 121 and the compression cylinder 131. The handle portion 103 includes a long grip region 103A extending in the vertical direction intersecting the central axis Q of the hitting cylinder 121, and a connecting portion extending substantially horizontally from the upper and lower ends of the grip region 103A to the front. The front end portion of the upper connection region 103B is connected to the striking cylinder 121, and the front end portion of the lower connection region 103C is connected to the compression cylinder 131. Thereby, the handle | steering-wheel part 103 is formed in the substantially D shape by the side view connected with the cylinder 121 for a hit | damage, and the cylinder 131 for a compression by two places up and down. The motor housing 109 is disposed substantially in parallel with the handle portion 103 at a predetermined interval on the front end side of the main body housing 107, that is, in front of the handle portion 103, and one end side in the long axis direction is disposed on the main body housing 107. It is connected.

  A driver guide 141 that constitutes an injection port for the nail n is disposed at the tip of the impact cylinder 121 in the main body housing 107 (downward in FIG. 1). The magazine 105 is arranged on the foremost side of the main body 101, that is, in front of the motor housing 109, and its long axis direction is set so as to be substantially parallel to the rotation axis Y of the drive motor 111. The other end is connected to the other end of the motor housing 109. Although not shown for convenience, the magazine 105 is provided with a pusher plate for pushing the nail n in the supply direction (leftward in FIG. 1), and the nail n is driven into the driving guide 141a of the driver guide 141 by the pusher plate. Are supplied one by one from the direction intersecting the driving direction. The driving path 141a constitutes a path when the driver 125 moves linearly to drive the nail n, and corresponds to the “operation line of the driving section” in the present invention.

  The impact cylinder 121 of the nail driving mechanism 120 and the compression cylinder 131 of the compression device 130 are such that the center axis Q of the impact cylinder 121 and the center axis P of the compression cylinder 131 are parallel to each other and the center axes Q, P Is formed so as to be parallel to the rotation axis Y of the drive motor 111. The compression cylinder 131 is disposed below the striking cylinder 121. A striking piston 123 for striking the nail n is accommodated in the striking cylinder 121 so as to be slidable in the long axis direction. The striking cylinder 121 corresponds to the “second cylinder” in the present invention, and the striking piston 123 corresponds to the “second piston” in the present invention. The striking piston 123 includes a piston main body 124 that is slidably accommodated in the striking cylinder 121, and a long driver for striking the nail n, which is integrally provided in the piston main body 124. 125, which moves linearly in the long axis direction of the hitting cylinder 121, and functions as an operating member that the driver 125 moves forward in the driving passage 141a of the driver guide 141 and drives the nail n. The piston main body 124 corresponds to the “sliding portion” in the present invention, and the driver 125 corresponds to the “driving portion” in the present invention. A nail driving mechanism 120 is configured by the hitting cylinder 121 and the hitting piston 123.

  A compression piston 133 is accommodated in the compression cylinder 131 of the compression device 130 so as to be slidable in the long axis direction. The compression piston 133 is driven from the drive motor 111 via the crank mechanism 115. The drive motor 111 is disposed in the motor housing 109 so that the rotation axis Y intersects the central axis Q of the compression cylinder 131. The rotation output of the drive motor 111 is appropriately decelerated by the gear reduction mechanism 113 and converted into a linear motion by a crank mechanism 115 as a motion conversion mechanism to reciprocate the compression piston 133 linearly. As a result, the volume of the compression chamber 131a, which is the internal space of the compression cylinder 131, changes, and the compression piston 133 moves to the rear side that decreases the compression chamber 131a, so that the air in the compression chamber 131a is compressed. That is, in the present embodiment, a reciprocating type compression device mainly composed of the compression cylinder 131, the compression piston 133, and the crank mechanism 115 is used as the compression device 130. The compression cylinder 131 corresponds to the “first cylinder” in the present invention, and the compression piston 133 corresponds to the “first piston” in the present invention.

  The crank mechanism 115 has a crank shaft 115a that is decelerated and rotated by the gear reduction mechanism 113, an eccentric pin 115b provided at a position that is eccentric from the rotation center of the crank shaft 115a, and one end that is rotatable relative to the eccentric pin 115b. The other end is connected to the compression piston 133 and is connected to the compression piston 133 so as to be relatively rotatable. The connection rod 115c is housed inside the main body housing 107 in the front region of the compression cylinder 131.

  The drive motor 111 is configured such that the trigger 103a provided on the handle portion 103 and a contact arm as an operation member provided on the tip region of the main body 101 (in this embodiment, the driver guide 141 has a function of the contact arm). ) To control (operate) driving and stopping. That is, the handle 103 is turned on when the trigger 103a that can be pulled with fingers and the trigger 103a is pulled to turn on the drive motor 111, and is driven when the pull is released. A motor drive trigger switch (not shown for convenience) is installed to switch the motor 111 to an off state. The trigger 103a is located between the center axis Q of the striking cylinder 121 and the center axis P of the compression cylinder 131, at a position close to the center axis Q of the striking cylinder 121, that is, the driving axis (striking axis) of the driver 125. Is arranged. The trigger 103a corresponds to the “driving operation unit” in the present invention.

  On the other hand, a driver guide 141 that also serves as a contact arm (in the following description, the contact arm 141 is referred to only when the driver guide 141 functions as a contact arm) is attached to be movable in the major axis direction (striking direction) of the nail n. For the sake of convenience, it is biased so as to protrude toward the tip side by a spring (not shown). When the contact arm 141 is in the protruding position, the contact arm switch for driving the motor (not shown) is turned off for convenience, and the contact arm switch is turned on when the contact arm 141 is moved to the main body housing 107 side. It is said. The drive motor 111 is energized when both the trigger switch and the contact arm switch are switched on, and is stopped when either one or both are switched off.

  The main body housing 107 includes a communication path 135 as a compressed air supply path that communicates the compression chamber 131a of the compression cylinder 131 and the inside of the impact cylinder 121, and a main opening / closing device that opens and closes the communication path 135. A valve 137 is provided. As shown in FIG. 1, in the nail driver 100, the striking piston 123 is moved to the rearmost position (the upper end position in the figure), and the compression piston 133 is moved to the frontmost end position (the bottom dead center). The state is defined as the initial position. The main valve 137 is provided on the cylinder head side of the compression cylinder 131 and is constituted by a normally closed type solenoid valve as an electrically driven valve that closes when no power is supplied. The compression piston 133 is moved to the end position. The communication path 135 is opened in the vicinity of the moved top dead center. Therefore, when the main valve 137 opens the communication path 135, the compressed air in the compression chamber 131a compressed by the compression piston 133 is supplied to the striking cylinder 121, and the striking piston 123 is moved by the supplied compressed air. The nail n is hit by the driver 125, and the nail n is driven into the workpiece (see FIG. 2).

  The hitting cylinder 121 is formed with an escape hole 127 with a check valve 127a for releasing the compressed air in the hitting cylinder 121 into the atmosphere at the end of the nail driving operation or just before the end of the nail driving operation. The relief hole 127 is provided at a position where when the striking piston 123 is moved to the foremost position, the piston main body 124 of the striking piston 123 passes and the interior of the striking cylinder 121 communicates with the atmosphere. . In other words, the configuration is such that the atmosphere communicates with the inside of the striking cylinder 121 at the same time as the nail driving by the driver 125 is completed. The check valve 127 a is configured by a leaf spring arranged so as to close the escape hole 127 outside the impact cylinder 121, and air in the atmosphere flows into the impact cylinder 121 from the escape hole 127. (Backflow) is regulated.

  When the compression piston 133 after the compression operation moves forward, the volume of the compression chamber 131a is increased, whereby the compression chamber 131a and the inside of the impact cylinder 121 become negative pressure, and the negative pressure causes the impact piston 123 to move. It is set as the structure moved to back. Further, when the compression piston 133 is placed at the foremost end position (bottom dead center) as an initial position, the compression cylinder 133 passes through the piston main body 133a of the compression piston 133 so that the compression cylinder 133 passes through the atmosphere. An outside air supply port 139 that communicates with the compression chamber 131a is provided. The main valve 137 is configured to close the communication passage 135 when the piston main body 133a of the compression piston 133 passes the outside air supply port 139 and is placed at the foremost end position (bottom dead center). . Thus, the nail driving operation by the nail driver 100 according to the present embodiment is configured such that when the compression piston 133 reciprocates once, the driver 125 of the driving piston 123 performs one nail driving operation. Yes.

  Next, the operation and method of use of the nailing machine 100 configured as described above will be described. In the initial state, when the contact arm 141 is pressed against the workpiece and the contact arm switch is turned on, and the trigger 103a is pulled and the trigger switch is turned on, the drive motor 111 is energized. The As a result, the crank mechanism 115 is driven via the gear reduction mechanism 113, the compression piston 133 starts moving backward, and the communication between the compression chamber 131a and the atmosphere by the outside air supply port 139 is blocked. At this time, since the main valve 137 closes the communication path 135, the volume of the compression chamber 131a is reduced, and the air trapped in the compression chamber 131a is compressed.

  As shown in FIG. 2, the main valve 137 is energized near the top dead center of the compression operation in which the compression piston 133 approaches the rear end position, and the communication path 135 is opened. For this reason, the compressed air in the compression chamber 131a is supplied into the striking cylinder 121 through the communication path 135, and the striking piston 123 is moved forward by the compressed air. Then, the driver 125 of the hammering piston 123 moved forward strikes the nail n waiting in the hammering passage 141a of the driver guide 141, and hammers it into the workpiece.

  When the piston main body 124 of the striking piston 123 passes through the escape hole 127, the compressed air in the striking cylinder 121 is released into the atmosphere through the relief hole 127. When the compression piston 133 is moved to the rearmost position, the rotation direction of the drive motor 111 is switched, and the compression piston 133 is moved forward while changing the movement direction. Due to this forward movement, the volume of the compression chamber 131 a is increased and the compression chamber 131 a is made negative, and the negative pressure acts on the striking piston 123 through the communication passage 135 and the striking cylinder 121. As a result, the striking piston 123 is sucked and returned to the rear position before striking.

  When the compression piston 133 returns to the initial position before compression (bottom dead center), the outside air supply port 139 is opened, and air in the atmosphere is supplied into the compression chamber 131a. Further, when the compression piston 133 returns to the position before the compression start, even if the trigger switch and the contact arm switch are maintained in the ON state, the energization to the drive motor 111 is cut off, the drive motor 111 is stopped, and at the same time the main switch Energization of the valve 137 is cut off, and the main valve 137 closes the communication path 135. Thus, one cycle of the nailing operation is completed.

  Although illustration of the interruption of energization to the drive motor 111 and the energization of the main valve 137 and the interruption thereof is omitted for convenience, for example, the rotation angle of the crankshaft 115a or the position of the eccentric pin 115b is appropriately detected by a position detection sensor. And a control device (controller) provided in the nail driver 100 so as to control at least the drive motor 111 based on the detection signal.

  In the present embodiment, in the nail driver configured such that the central axis Q of the impact cylinder 121 and the central axis P of the compression cylinder 131 are arranged parallel to each other, the impact cylinder 121 and the compression cylinder 131 are The handle 103 is arranged at the rear, and the trigger 103 a is arranged between the center axis of the striking cylinder 121 (on the driving axis of the driver 125) and the center axis of the compression cylinder 131. In FIG. 1, the position of the center of gravity of the nailing machine 100 in a state where the battery pack 110 is attached to the handle portion 103 is indicated by a symbol G. The center of gravity G is below the center axis P of the compression cylinder 131.

  Therefore, during the driving operation of the nail n, the operator can set the driving axis of the driver 125 and a plane that passes through the center of gravity G and is parallel to the driving axis and is orthogonal to the rotation axis Y of the drive motor 111 (hereinafter referred to as the center of gravity surface). ), The grip area 103A of the handle portion 103 can be pushed forward with the palm of the hand. As a result, the reaction moment that the operator receives with the palm of the nail n is reduced. Therefore, it is easy to suppress the separation (lifting) of the tip of the driver guide 141, which is the tip of the nail driver 100 with respect to the work material, from the work material, and the nail floating where the nail n protrudes from the work material. This is effective in preventing the phenomenon.

  Further, according to the present embodiment, with respect to the handle portion 103, the upper end of the grip region 103A extending in the vertical direction is connected to the rear end portion of the striking cylinder 121, and the lower end is connected to the rear end portion of the compression cylinder 131. It is configured as a generally D-shaped handle in a side view. For this reason, the handle | steering-wheel part 103 with high intensity | strength is constructed | assembled compared with the handle | steering-wheel part of the type joined only at the end of the extending direction.

  In the present embodiment, the lower end of the battery pack 110 attached to the lower end side of the handle portion 103 is positioned above the lower end of the magazine 105. The battery pack 110 is a member having the largest weight among the members constituting the nailing machine 100, and in the present embodiment, the battery pack 110 that is such a heavy object is disposed on the upper side, It becomes possible to bring the center of gravity G of the nailing machine 100 closer to the driving axis of the driver 125, which is effective in enhancing the reaction moment reduction effect.

  In this embodiment, in the configuration in which the handle portion 103 is disposed behind the striking cylinder 121 and the compression cylinder 131, the position of the trigger 103a is set to be near the driving axis of the driver 125, but the trigger 103a The position of is not limited to this. For example, the trigger 103a can be changed to a configuration in which the trigger 103a is disposed on the center of gravity extending through the center of gravity of the nail driver 100 in parallel with the center axis Q of the impact cylinder 131 or disposed above the center of gravity. Or a configuration arranged between the center axis Q of the striking cylinder 121 and the center of gravity plane extending in parallel with the center axis Q of the striking cylinder 131 through the center of gravity of the nailing machine 100, and further for compression You may change into the structure etc. which are arrange | positioned between the central axis P of the cylinder 131, and the central axis Q of the cylinder 121 for an impact. Even in the configuration as described above, it is possible to reduce the reaction moment at the time of nailing as compared with the conventional nailing machine.

  Further, in the present embodiment, the handle portion 103 is arranged at the rear of the cylinder. However, the arrangement portion of the handle portion 103 is arranged, for example, so as to extend downward (in the radial direction) from the outer surface of the cylinder body portion. In this case, the trigger 103a may be arranged at least on the center of gravity of the nailing machine 100 or above the center of gravity.

  In the present embodiment, the battery pack 110 is mounted on the handle portion 103. However, the battery pack 110 is, for example, between the handle portion 103 and the drive motor 111 and in a region below the compression cylinder 131. You may arrange. According to such a configuration, since the space surrounded by the handle portion 103, the drive motor 111, and the compression cylinder 131 is used, the nailing machine 100 can be made compact and the nailing machine 100 can be made compact. The protection effect of the battery pack 110 when the battery is dropped can be obtained.

In view of the gist of the invention, the following aspects can be configured.
(Aspect 1)
"Battery,
A motor driven by electric power supplied from the battery;
A first cylinder;
A first piston driven by the motor to generate compressed air by reciprocating in the first cylinder;
A second cylinder arranged in parallel with the first cylinder;
A second piston including a sliding portion slidably accommodated in the second cylinder and a long driving portion provided in the sliding portion and driving a stopper;
An elongated handle extending in a direction intersecting with the central axis direction of the first cylinder and the second cylinder;
A magazine for supplying the stopper onto the operation line of the driving portion of the piston;
Have
Compressed air in the first cylinder generated by the first piston is supplied into the second cylinder, the second piston is moved linearly by the compressed air, and a driving portion of the second piston is used. A driving tool for performing the driving operation of the stopper,
When the side on which the stopper is driven is defined as the front side and the opposite side is defined as the rear side, the handle is disposed behind the second cylinder and / or the first cylinder and energizes the motor. And a driving operation unit that can be operated by an operator, and the driving operation unit is disposed between a central axis of the first cylinder and a central axis of the second cylinder. Driving tool. "

  According to the first aspect of the invention, the operator grips the handle and operates the driving operation portion while applying a pressing force toward the workpiece to the driving tool to drive the stopper to the workpiece. When performing the above, it is possible to push the vicinity of the driving axis of the handle (near the hitting axis) with the palm of the hand. As a result, the reaction moment received by the operator (palm) at the time of driving the stopper is reduced, and it is easy to suppress the separation (lifting) of the driving tool from the workpiece, which is effective in preventing the stopper from floating.

100 nailing machine (driving tool)
DESCRIPTION OF SYMBOLS 101 Main part 103 Handle part 103A Gripping area 103B Upper connecting area 103C Lower connecting area 103a Trigger 105 Magazine 107 Main body housing 109 Motor housing 110 Battery pack 111 Drive motor (motor)
113 gear reduction mechanism 115 crank mechanism 115a crankshaft 115b eccentric pin 115c connecting rod 120 nail driving mechanism 121 impact cylinder (second cylinder)
123 Blowing piston (second piston)
124 Piston body (sliding part)
125 driver (driving part)
127 Relief hole 127a Check valve 130 Compressor 131 Cylinder for compression (first cylinder)
131a Compression chamber 133 Piston for compression (first piston)
133a Piston body 135 Communication path 137 Main valve 139 Outside air supply port 141 Driver guide (contact arm)
141a Driving path (operation line of driving section)

Claims (6)

Battery,
A motor driven by electric power supplied from the battery;
A first cylinder;
A first piston driven by the motor to generate compressed air by reciprocating in the first cylinder;
A second cylinder arranged in parallel with the first cylinder;
A second piston including a sliding portion slidably accommodated in the second cylinder and a long driving portion provided in the sliding portion and driving a stopper;
An elongated handle extending in a direction intersecting with the central axis direction of the first cylinder and the second cylinder;
A magazine for supplying the stopper onto the operation line of the driving portion of the second piston;
Have
Compressed air in the first cylinder generated by the first piston is supplied into the second cylinder, the second piston is moved linearly by the compressed air, and a driving portion of the second piston is used. A driving tool for performing the driving operation of the stopper,
The handle is provided with a driving operation unit that can be operated by an operator for energizing and driving the motor, and the driving operation unit passes through the center of gravity of the driving tool with the battery mounted. The driving tool, wherein the driving tool is disposed on the same plane as a center of gravity extending in parallel with a central axis of the second cylinder or on the second cylinder side of the center of gravity. The driving tool according to claim 1,
The driving tool is characterized in that the driving operation unit is disposed between the center of gravity surface and a central axis of the second cylinder. The driving tool according to claim 2,
When the side on which the stopper is driven is defined as the front side and the opposite side is defined as the rear side, the handle and the driving operation portion provided on the handle are disposed behind the second cylinder and / or the first cylinder. A driving tool characterized by The driving tool according to claim 2 or 3,
The first cylinder is disposed such that a central axis of the first cylinder is located between a central axis of the second cylinder and the center of gravity surface,
The driving tool is arranged between the central axis of the first cylinder and the central axis of the second cylinder. A driving tool according to any one of claims 2 to 4,
When the side on which the stopper is driven is defined as the front side and the opposite side is defined as the rear side, the handle is disposed behind the second cylinder and the first cylinder and intersects the central axis of the first cylinder. And extending in one direction, one end in the extending direction is connected to the rear end of the second cylinder, and the other end in the extending direction is connected to the rear end of the first cylinder. A driving tool. The driving tool according to any one of claims 2 to 5,
The battery is arranged so that the rear end of the battery is higher than the rear end of the magazine when the stopper supply side of the magazine is defined as the upper side and the opposite side is defined as the lower side. Driving tool.

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