Electric driving tool

Abstract

The invention provides an electric driving tool. The driving tool has a head portion in which a driving channel is formed. The contact arm is movably arranged at the top end of the machine head part. The contact arm moves between an off position and an on position. And the driving device is used for driving the driving piece arranged in the driving channel. The shutter moves between a blocking position located on the movement path of the driver and an opening position withdrawn from the movement path and allowing the driver to move. The link connects the contact arm and the nose part. The link moves the shutter from the open position to the blocked position in conjunction with the movement of the contact arm from the on position to the off position. Therefore, the limiting part can reliably move to the opening position or the blocking position.

Description

Technical Field

[0001] The present invention relates to an electric driving tool for driving a driving member such as a nail or a staple into wood or the like. Background Art

[0002] In the prior art, an electric driving tool has a limiting component, which is located between a driver and a driven part and is used to block the driving action of the driver. The limiting component is mounted on the tool body in a manner that it can rotate around a pivot pin and is biased toward a blocking position by a torsion spring. A contact arm is provided at the top of the driving tool. The contact arm is moved from an off position to an on position by pushing the contact arm against a workpiece. The limiting component is linked with the contact arm to move from the blocking position to an open position that allows the driving action of the driver. When the contact arm is separated from the workpiece, the contact arm is moved from the on position to the off position by a spring. The limiting component is moved from the open position to the blocking position by a torsion spring. However, when the torsion spring fails, the limiting component may not be able to return to the blocking position from the open position.

[0003] Therefore, there is a need for an electric driving tool having a structure that enables a restricting member to reliably move from an open position to a blocked position. Summary of the invention

[0004] According to one embodiment of the present invention, an electric driving tool has a nose portion formed with a driving channel. A contact arm is movably disposed at the top of the nose portion. The contact arm moves between a disconnected position protruding from the nose portion and a connected position closer to the nose portion than the disconnected position. The driver strikes a driving member disposed in the driving channel. A limiting component moves between a blocking position and an open position, wherein the blocking position refers to a position where the limiting component is located on a moving path of the driver; and the open position refers to a position where the limiting component retreats from the moving path and allows the driver to move. A connecting component connects the contact arm and the limiting component. The connecting component and the movement of the contact arm from the disconnected position to the connected position are linked to move the limiting component from the blocking position to the open position. Furthermore, the connecting component and the movement of the contact arm from the connected position to the disconnected position are linked to move the limiting component from the open position to the blocking position.

[0005] Therefore, the movement of the contact arm in both directions is connected (linked) with the movement of the limiting member in both directions through the connecting member. Therefore, the limiting member can reliably move to the open position or the blocking position relative to the movement of the contact arm. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 It is a right side view of the electric driving tool.

[0007] Figure 2 It is a schematic longitudinal sectional view of the driving tool.

[0008] Figure 3 yes Figure 1 The III-III section view.

[0009] Figure 4 yes Figure 1 Section IV-IV of FIG.

[0010] Figure 5 It is a perspective view of a part of a lifter and a driver.

[0011] Figure 6 yes Figure 1 VI direction view.

[0012] Figure 7 It is an exploded perspective view showing the connection structure between the contact arm and the shutter.

[0013] Figure 8 This is a partial longitudinal sectional view of the driving tool in a state where the contact arm is moved to the closed position.

[0014] Fig. 9 It is the state of the driver hitting the object. Figure 4 The corresponding figure.

[0015] Fig.10 The lifter is in the state where the driver is lifted. Figure 4 The corresponding figure.

[0016] Fig.11 The lower end of the driver is located above the setting position. Figure 4 The corresponding figure.

[0017] Fig.12 Includes local sections Figure 2 View from the XII direction.

[0018] Fig.13 yes Figure 2 The feed claw is returning in the direction opposite to the feed direction. Fig.12 The corresponding figure.

[0019] Fig.14 This is an enlarged view of the state in which the shutter blocks the impact of the driver.

[0020] Fig.15 yes Fig.14 The XV-XV section view. DETAILED DESCRIPTION

[0021] According to another aspect of the present invention, the connecting member has a first end and a second end, wherein the first end is rotatably connected to the contact arm, and the second end is rotatably connected to the limiting member. Thus, the movement of the contact arm can be smoothly transmitted to the limiting member through the connecting member.

[0022] According to another aspect of the present invention, the limiting member moves in a direction different from the moving direction of the contact arm between the on position and the off position. Therefore, the limiting member can be moved in a preferred direction. For example, even if the moving direction of the contact arm is set to a striking direction that is easy to operate by pushing the contact arm against the workpiece, the limiting member is easy to move in a direction different from the striking direction to block the driving channel.

[0023] According to another aspect of the present invention, the limiting component moves in a direction orthogonal to the striking direction of the driver. Accordingly, the installation space of the limiting component in the striking direction can be reduced. For example, compared with the case where the limiting component moves in the striking direction, the installation space of the limiting component in the striking direction can be reduced. In addition, by making the limiting component have a thickness along the striking direction, the strength of the limiting component can be ensured.

[0024] According to another embodiment of the present invention, the machine head has a guide hole orthogonal to the striking direction of the driver. The limiting component is inserted into the guide hole and slides along the guide hole. Therefore, the limiting component can be easily assembled to the machine head through the guide hole. In addition, the limiting component can move smoothly through the guide hole.

[0025] According to another aspect of the present invention, the limiting component has a wide portion, which is formed wider than the width of the driver. When the driver moves along the striking direction and contacts the limiting component, the wide portion is supported by the downstream side bearing surface of the guide hole in the striking direction. Therefore, the load of the driver can be dispersed and transmitted to the downstream side bearing surface of the guide hole. Accordingly, the impact of the driver can be supported by the limiting component and the downstream side bearing surface of the guide hole.

[0026] According to another aspect of the present invention, when the driver moves along the striking direction and contacts the limiting component, the limiting component is supported by the upstream side bearing surface and the downstream side bearing surface of the guide hole in the striking direction. For example, when the limiting component is tilted by the driver, the limiting component is supported by being sandwiched between the upstream side bearing surface and the downstream side bearing surface. Therefore, the driver's strike can be supported by the limiting component, the upstream side bearing surface and the downstream side bearing surface of the guide hole.

[0027] According to another aspect of the present invention, when viewed from the striking direction of the driver, the driver is located on the width center line of the limiting member. The connecting member is also located on the width center line of the limiting member. Accordingly, when the driver contacts the limiting member, the limiting member can support the driver without tilting to one side in the width direction.

[0028] According to another embodiment of the present invention, an electric driving tool has a head portion formed with a driving channel. A contact arm is movably disposed at the top of the head portion. The contact arm moves between a disconnected position protruding from the head portion and a connected position closer to the head portion than the disconnected position. The driver strikes a driving member disposed in the driving channel. A limiting component is disposed at the head portion in a manner movable in a direction orthogonal to the striking direction of the driver. The limiting component moves between a blocking position and an open position, wherein the blocking position refers to a position where the limiting component is located on a moving path of the driver; and the open position refers to a position where the limiting component retreats from the moving path and allows the driver to move. Therefore, the limiting component moves in a direction orthogonal to the striking direction. Therefore, the setting space of the limiting component in the striking direction can be reduced.

[0029] According to another aspect of the present invention, the driving tool is a nail connected to the connecting tool wound in a spiral shape. Therefore, the driving tool can be mounted in a compactly accommodated state.

[0030] Next, according to Figures 1 to 15 An embodiment of the present invention will be described below. Figure 1 As shown, the driving tool 10 is, for example, a gas spring type driving tool that uses air pressure to drive the driving member n. In the following description, the driving direction of the driving member n is defined as downward, and the direction opposite to the driving direction is defined as upward. The user holds the driving tool 10 by hand and Figure 1 The center is on the left. The side close to the user is defined as the back (user side), and the back side is defined as the front. The left and right directions are defined based on the user.

[0031] like Figure 1 , 2 As shown, the driving tool 10 has a tool body 1. The tool body 1 has a structure in which a cylinder 1c is housed in a substantially cylindrical main body shell 1a. A piston 1b is housed in the cylinder 1c so as to be able to reciprocate up and down. The upper portion of the cylinder 1c above the piston 1b is connected to a pressure storage chamber 1f. A compressed gas such as air is sealed in the pressure storage chamber 1f. The gas pressure of the pressure storage chamber 1f acts as a thrust to move the piston 1b downward (advance in the driving direction).

[0032] like Figure 1 As shown in FIG. 1 , a metal head 2 is provided at the lower part of the tool body 1. Figure 2As shown, a driving channel 2a is formed inside the machine head 2. The upper end of the driving channel 2a is connected to the lower part of the cylinder 1c. The machine head 2 has a plate-shaped channel component 2c that protrudes obliquely upward as it moves toward the rear. The channel component 2c is composed of a single component that is integrated with the machine head 2. The channel component 2c is used to guide the movement of the connecting driving member N. The connecting driving member N has a plurality of driving members n. The plurality of driving members n are temporarily connected side by side through flexible members such as resin sheets and wires. The connecting driving members N are loaded into a magazine 16 in a spirally wound state. Each driving member n is guided by the channel component 2c in a posture extending up and down and is supplied to the driving channel 2a one by one. A contact arm 11 that can slide up and down is provided at the lower part of the machine head 2. The contact arm 11 is forced in a manner of moving downward relative to the machine head 2. Accordingly, the contact arm 11 is located in a disconnected position protruding downward from the lower end of the machine head 2. The contact arm 11 moves upward along the nose portion 2 by being pressed against the workpiece W. As a result, the contact arm 11 is located at a contact position where the lower end thereof is substantially at the same height as the lower end of the nose portion 2 .

[0033] like Figure 1 As shown, a grip 12 for the user to hold is provided at the rear of the tool body 1. An operating portion 13 for the user to perform a triggering operation with a fingertip is provided on the front lower surface of the grip 12. The triggering operation of the operating portion 13 is effective by moving the contact arm 11 relatively upward relative to the machine head 2. By triggering the operating portion 13, the switch 17 changes from off to on. When the switch 17 is turned on, a signal is sent to the controller 19. The controller 19 activates the drive unit 4 described later based on the signal sent. A battery mounting portion 14 is provided at the rear of the grip 12. A battery pack 15 can be detachably mounted on the rear surface of the battery mounting portion 14. The battery pack 15 can be removed from the battery mounting portion 14 and can be repeatedly charged using a charger prepared separately for use. The battery pack 15 acts as a power source for supplying electric power to the drive unit 4.

[0034] like Figure 2As shown, a driver 1d which is longer vertically is combined with the lower surface of the piston 1b. The lower part of the driver 1d enters the driving channel 2a. The driver 1d moves downward in the driving channel 2a under the action of the air pressure of the pressure storage chamber 1f acting on the upper surface of the piston 1b. The lower end of the driver 1d strikes a driving member n supplied to the driving channel 2a. The struck driving member n is ejected from the ejection port 2b of the machine head 2. The ejected driving member n is driven into the driven member W. A damper 1g is arranged at the lower part of the cylinder 1c, and the damper 1g is used to absorb the impact at the lower moving end of the piston 1b. The damper 1g is formed of, for example, a rubber material. The damper 1g is cylindrical, and the driver 1d passes through the center hole of the damper 1g. The lower surface of the piston 1b contacts the upper surface of the damper 1g.

[0035] like Figure 7 As shown in FIG. 1 , the machine head 2 has a rectangular guide hole 2d extending in the front-rear direction. A shutter (limiting member) 7 is inserted along the guide hole 2d in a manner that allows sliding in the front-rear direction. The shutter 7 moves between a blocking position between the driving member n provided in the driving channel 2a and the driving tool 1d and an opening position that opens the space therebetween. Figure 2 As shown in FIG. 1 , the shutter 7 in the blocking position blocks the movement of the driver 1d. Figure 8 As shown, the shutter 7 in the open position allows the movement of the driver 1d. The shutter 7 can reduce the setting space in the striking direction by sliding along the front-back direction orthogonal to the striking direction of the driver 1d. In addition, the thickness of the shutter 7 in the striking direction can be used to improve the strength of the shutter 7.

[0036] like Figure 7 As shown, the rear portion 8b of the connecting rod (connecting member) 8 is rotatably connected to the shutter 7 via the rotating shaft 8d. The front portion 8a of the connecting rod 8 is rotatably connected to the connecting bracket 18 via the rotating shaft 8c. The connecting bracket 18 is integrally connected to the contact arm 11 via the connecting bolt 11a. Through the above connection, the shutter 7 is linked to the up and down movement of the contact arm 11 and slides in the front and rear direction. Figure 2 As shown, when the contact arm 11 is in the disconnected position moved downward relative to the machine head 2, the shutter 7 moves to the blocking position. Figure 8As shown, when the contact arm 11 is in the connected position moving upward relative to the machine head 2, the shutter 7 moves to the open position. Therefore, even if the driver 1d moves downward when the contact arm 11 is in the disconnected position due to an unfavorable situation such as an erroneous operation of the drive unit 4, the shutter 7 can suppress the driving of the driving part n. In addition, when the contact arm 11 is about to return to the disconnected position after the driving of the driving part n is completed and the driver 1d rises, the shutter 7 is also linked to return to the blocked position. Accordingly, the shutter 7 contacts the driver 1d and stops. The shutter 7 returns to the blocked position after the driver 1d rises. The shutter 7 does not hinder the rise of the driver 1d.

[0037] Fig.14 Indicates the state in which the shutter 7 located in the blocking position blocks the movement of the driver 1d. The driver 1d collides with the rear portion of the shutter 7 and stops. Therefore, the shutter 7 is subjected to an external force and moves downward at the rear portion and upward at the front portion with the shaft hole 7a as the center. Then, the rear portion of the shutter 7 is supported by the downstream side bearing surface 2f of the guide hole 2d. In addition, the front portion of the shutter 7 is supported by the upstream side bearing surface 2g of the guide hole 2d. In this way, the shutter 7 is supported in a manner sandwiched between the upstream side bearing surface 2g and the downstream side bearing surface 2f of the guide hole 2d, thereby being able to stably support the blow of the driver 1d. As shown in FIG. Fig.15 As shown, the rear portion of the shutter 7 has a wide portion 7b, which extends to the left and right sides in a manner wider than the width of the driver 1d in the left-right direction. Each wide portion 7b is also supported in a manner of being clamped between the upstream side bearing surface 2g and the downstream side bearing surface 2f of the guide hole 2d. The center line of the width of the driver 1d in the left-right direction coincides with the center line of the width of the shutter 7 in the left-right direction. The center line of the width of the connecting rod 8 in the left-right direction also coincides with the center line of the width of the shutter 7 in the left-right direction. Therefore, when the driver 1d contacts the shutter 7, the shutter 7 can support the driver 1d without tilting to one side in the left-right direction.

[0038] like Figure 4 As shown, a rack 1e is provided on the right side of the driver 1d. The rack 1e has a plurality of (for example, 7) convex engaged portions L that protrude toward the wheel 3a side (right side). The engaged portions L are arranged at certain intervals in the length direction (up and down direction) of the driver 1d. Hereinafter, the engaged portions L are also referred to as the first engaged portion L1, the second engaged portion L2, ... the seventh engaged portion L7 from the upper side. Each engaged portion L engages with the lifter 3. After the driver 1d strikes, the lifter 3 returns the driver 1d and the piston 1b upward. Accordingly, the piston 1b increases the air pressure in the pressure storage chamber 1f. As shown in FIG. Figure 2As shown, a driving unit 4 for moving the lifter 3 is arranged in a row at the rear of the lifter 3. The lifter 3 and the driving unit 4 are accommodated in a substantially cylindrical driving unit housing 1h. The driving unit housing 1h connects the lower part of the main body shell 1a and the lower part of the battery mounting part 14. The driving unit housing 1h is integrally provided with the main body shell 1a.

[0039] like Figure 3 As shown, the driving unit 4 has a motor 4a as a driving source. The motor 4a is configured to rotate the axis of the output shaft 4b (motor axis J) in a direction parallel to the driving direction (in Figure 3 The output shaft 4b is rotatably supported by the drive unit housing 1h through a bearing 4c. The gear formed at the front of the output shaft 4b is connected to the speed reduction unit 4d. The speed reduction unit 4d uses three sets of planetary gear trains 4e. The planetary gear trains 4e are coaxial with each other and coaxial with the motor axis J. The rotational output of the motor 4a is decelerated by the speed reduction unit 4d and output to the lifter 3.

[0040] like Figure 3 As shown, the lifter 3 has: a rotating shaft 3c, which is connected to the speed reduction part 4d; and a wheel part 3a, which is supported on the rotating shaft 3c. The lifter 3 is housed in a roughly cylindrical mechanism housing 3b, and the roughly cylindrical mechanism housing 3b is housed in the drive unit housing 1h. The axis of the rotating shaft 3c is consistent with the motor axis J. The front part of the mechanism housing 3b is blocked by the cover part 3e. The front end of the rotating shaft 3c is supported by the bearing 3d held on the mechanism housing 3b in a rotatable manner through the cover part 3e. The rear end of the rotating shaft 3c is combined with the planetary carrier (career) 4f of the speed reduction part 4d. The planetary carrier 4f of the speed reduction part 4d is rotatably supported on the mechanism housing 3b through the bearing 3d arranged on the outer peripheral side.

[0041] like Figure 4 As shown in FIG. 1 , when the motor 4a is started, the rotating shaft 3c and the wheel portion 3a integrally move in the direction of the arrow R (in FIG. Figure 4 The wheel portion 3a is configured to rotate only in the direction of arrow R. Figure 5 As shown in FIG. 1 , the lifter 3 has two wheel portions 3a facing each other. A plurality of engagement pins P are arranged between the wheel portions 3a. Figure 4 As shown, a plurality of engagement pins P are arranged at regular intervals along the outer circumference of the wheel portion 3a. The engagement pins P are also referred to as the first engagement pin P1, the second engagement pin P2, ..., the seventh engagement pin P7 in order from the front side in the rotation direction of the wheel portion 3a.

[0042] like Figure 4As shown, a position detection sensor 6 for detecting the position of the lifter 3 is provided on the lifter 3. The position detection sensor 6 has two magnets 6b, 6c and a Hall IC 6a for detecting the magnetic force of each magnet 6b, 6c. Each magnet 6b, 6c is provided on the outer periphery of the wheel portion 3a along the rotation direction of the wheel portion 3a. The Hall IC 6a is provided in the mechanism housing 3b. When the Hall IC 6a detects the magnetic force of each magnet 6b, 6c, it sends a signal to the controller 19. Based on this, the controller 19 can determine the rotation position of the wheel portion 3a.

[0043] Figure 4 Indicates the state in which the driver 1d is set in the standby position after being returned to the upper side by the lifter 3. The driver n located at the front end connected to the driver N is set in the driving channel 2a. In addition, the 7th engagement pin (the last engagement pin) P7 of the lifter 3 is engaged with the 7th engaged part (the last engaged part) L7 of the rack 1e. Accordingly, the driver 1d overcomes the air pressure of the pressure storage chamber 1f and is maintained in the standby position. At this time, the 1st magnet 6b is located in a position facing the Hall IC 6a. Accordingly, the controller 19 determines that the driver 1d is in the standby position.

[0044] like Figure 8 As shown, when using the driving tool 10, the user first holds the handle 12 (see Figure 1 ) to push the contact arm 11 to the workpiece W. As a result, the contact arm 11 moves upward relative to the head 2. The limiting structure for mechanically limiting the detent operation of the operating part 13 is linked with the upward movement of the head 2 to enable the detent operation of the operating part 13. The shutter 7 is linked with the contact arm 11 to slide to the open position that allows the driver 1d to strike. Then, as shown in FIG. Figure 2 As shown in FIG. 1 , when the user presses the operating portion 13, the switch 17 changes from off to on, and the controller 19 activates the driving portion 4. Figure 4 As shown, the wheel portion 3a rotates in the direction of arrow R.

[0045] like Fig. 9 As shown, by the rotation of the wheel portion 3a, the seventh engaging pin P7 passes over the seventh engaged portion L7 and the engagement between them is disengaged. Then, the piston 1b moves downward under the action of the air pressure of the pressure accumulator chamber 1f until it contacts the buffer member 1g. Accordingly, the driver 1d drives the leading driven member n into the driven member W. Fig.10As shown, the wheel portion 3a continues to rotate in the direction of the arrow R. Then, the first engaging pin P1 engages with the first engaged portion L1. As the wheel portion 3a further continues to rotate, the second engaging pin P2 engages with the second engaged portion L2, and the third engaging pin P3 engages with the third engaged portion L3. The following engaging pins P engage with each engaged portion L in turn. Accordingly, the driver 1d and the piston 1b move upward. In addition, the situation where the number marked on the reference numeral P of the engaged engaging pin P is consistent with the number marked on the reference numeral L of the engaged portion L is a normal meshing state.

[0046] like Fig.11 As shown in FIG. 1 , the wheel portion 3a continues to rotate, and the second magnet 6c faces the Hall IC 6a. The Hall IC 6a detects the magnetic force of the second magnet 6c. Then, the Hall IC 6a sends a signal to the controller 19 (see FIG. 1 ). Figure 2 ) sends a signal. The controller 19 determines that the lower end of the driver 1d is located above the setting position of the driver n. Then, the controller 19 activates the drive unit 4 to reduce the rotation speed of the wheel portion 3a. Accordingly, excessive rotation of the wheel portion 3a is suppressed. In addition, the wheel portion 3a can be prevented from passing through the standby position of the driver 1d. Furthermore, the controller 19 activates the feed mechanism 5 to transport the driver n to the setting position.

[0047] like Figure 2 , 6 As shown, the feed mechanism 5 is arranged to be located between the machine head 2 and the nail magazine 16. The feed mechanism 5 has a feeder 5a, which conveys the driven part n to the setting position. The feeder 5a has a solenoid 5h that is actuated by a controller 19. The solenoid 5h is arranged on a solenoid holder 5k made of resin. Accordingly, the impact received by the machine head 2 due to the impact of the driving device 1d is not easily transmitted to the solenoid 5h. Therefore, the solenoid 5h can be prevented from being damaged due to the impact.

[0048] like Fig.14 As shown, the solenoid holder 5k has a pair of protruding portions 5m at its front portion that protrude toward the machine head 2. The pair of protruding portions 5m sandwich the plunger 5i assembled to the solenoid 5h. Figure 6 As shown, each extension 5m abuts against a surface parallel to the supply surface of the guide punching member n of the channel component 2c. Each extension 5m and the channel component 2c are connected to each other by bolts and nuts. Accordingly, the solenoid 5h is fixed to the machine head 2 by the solenoid holder 5k. Therefore, compared with the structure in which the solenoid 5h is fixed to the nail magazine 16, the solenoid 5h can be appropriately configured relative to the machine head 2. In addition, by assembling the solenoid 5h to the solenoid holder 5k, the feeder 5a can be unitized. Therefore, the feeding mechanism 5 can be easily assembled to the machine head 2.

[0049] like Figure 6 As shown, the solenoid holder 5k has a recess 5n at its rear portion, and the convex portion 16a of the nail magazine 16 is inserted into the recess 5n in a removable manner. By inserting the convex portion 16a into the recess 5n, the solenoid holder 5k and the nail magazine 16 are locked in a manner that does not deviate greatly from each other. The feeding mechanism 5 has a holder cover 5p that covers the feeder 5a from the outside. The holder cover 5p covers the solenoid holder 5k and the channel member 2c in a manner that spans the solenoid holder 5k and the channel member 2c. The holder cover 5p supports the convex portion 16a of the nail magazine 16 in a manner that is sandwiched between the convex portion 16a and the recess 5n of the solenoid holder 5k.

[0050] like Fig.12 As shown, the feeder 5a has a plunger 5i that can move in the supply direction of the driven part n relative to the solenoid 5h. A feed claw 5b is rotatably mounted on the top end of the plunger 5i. The feed claw 5b is urged by a spring 5c ​​so as to protrude toward the driven part n. The feed mechanism 5 has a check claw 5e on the opposite side of the feed claw 5b across the driven part n. The check claw 5e is rotatably assembled to the cover member 2e of the machine head 2. The check claw 5e is urged by a spring 5f so as to protrude toward the driven part n.

[0051] like Fig.12 As shown, the plunger 5i is urged in the feeding direction by the feed spring 5j. When the solenoid 5h receives electric power based on the control of the controller 19, the plunger 5i overcomes the force of the feed spring 5j and moves in the direction opposite to the feeding direction. Fig.13 As shown, the feed claw 5b also moves in the direction opposite to the feeding direction. The feed claw 5b has a feed inclined surface 5d that is inclined forward as it approaches the top end protruding toward the driven member n. The feed inclined surface 5d abuts against the driven member n as the feed claw 5b moves in the direction opposite to the feeding direction. Accordingly, the feed claw 5b overcomes the force of the spring 5c ​​and retreats in the direction away from the driven member n. The feed claw 5b moves to the rear side over one driven member n. The connected driven member N is restricted from moving in the direction opposite to the feeding direction by the non-return claw 5e. Therefore, the connected driven member N is kept from following the return of the feed claw 5b.

[0052] When the electric power to the solenoid 5h is cut off, the feed claw 5b moves in the feeding direction by the force of the feed spring 5j. The feed claw 5b pushes the driving member n in the feeding direction. Then, the connected driving member N is conveyed toward the driving channel 2a. The leading driving member n is set at the setting position. Fig.12As shown in the figure, the anti-return claw 5e has an anti-return inclined surface 5g that is inclined forward as it approaches the top end protruding toward the driven part n. When the driven part N is conveyed, the driven part n contacts the anti-return inclined surface 5g from the rear. Accordingly, the anti-return claw 5e overcomes the force of the spring 5f and retreats in the direction away from the driven part n. After the feed claw 5b sends the driven part n to the setting position, the force of the feed spring 5j is also used to push the driven part n in the feeding direction. Accordingly, it is possible to prevent the driven part n sent to the setting position from returning in the direction opposite to the feeding direction.

[0053] As mentioned above, Figure 2 As shown, the driving tool 10 has a machine head 2 formed with a driving channel 2a. The contact arm 11 is movably arranged at the top of the machine head 2. The contact arm 11 moves between a disconnected position protruding from the machine head 2 and a connected position closer to the machine head 2 than the disconnected position. The driver 1d strikes the driving member n arranged in the driving channel 2a. The shutter 7 moves between a blocking position and an open position, wherein the blocking position refers to a position where the shutter 7 is located on the moving path of the driver 1d; and the open position refers to a position where the shutter 7 retreats from the moving path and allows the movement of the driver 1d. The connecting rod 8 connects the contact arm 11 and the shutter 7. The connecting rod 8 is linked to the movement of the contact arm 11 from the disconnected position to the connected position to move the shutter 7 from the blocked position to the open position. In addition, the connecting rod 8 is linked to the movement of the contact arm 11 from the connected position to the disconnected position to move the shutter 7 from the open position to the blocked position.

[0054] Therefore, the movement of the contact arm 11 in both directions is connected to the movement of the shutter 7 in both directions through the link 8. Therefore, the shutter 7 can reliably move to the open position or the blocking position relative to the movement of the contact arm 11.

[0055] like Figure 7 As shown, the link 8 has a front portion 8a rotatably connected to the contact arm 11 and a rear portion 8b rotatably connected to the shutter 7. Thus, the movement of the contact arm 11 can be smoothly transmitted to the shutter 7 through the link 8.

[0056] like Figure 8 , 15 As shown, the shutter 7 moves in a direction different from the moving direction of the contact arm 11 between the on position and the off position. Therefore, the shutter 7 can be moved in a preferred direction. For example, even if the moving direction of the contact arm 11 is set to a striking direction that is easy to operate by pushing the contact arm 11 against the workpiece, the shutter 7 is easy to move in a direction different from the striking direction to block the driving channel 2a.

[0057] like Figure 8 , 14As shown, the shutter 7 moves in a direction perpendicular to the striking direction of the driver 1d. Accordingly, the installation space of the shutter 7 in the striking direction can be reduced. For example, compared with the case where the shutter 7 moves in the striking direction, the installation space of the shutter 7 in the striking direction can be reduced. In addition, by making the shutter 7 have a thickness along the striking direction, the strength of the shutter 7 can be ensured.

[0058] like Figure 7 , 14 As shown, the machine head 2 has a guide hole 2d orthogonal to the striking direction of the driver 1d. The shutter 7 is inserted into the guide hole 2d and slides along the guide hole 2d. Therefore, the shutter 7 can be easily assembled to the machine head 2 through the guide hole 2d. In addition, the shutter 7 can move smoothly through the guide hole 2d.

[0059] like Fig.14 , 15 As shown in FIG. 1 , the shutter 7 has a wide portion 7b formed wider than the width of the driver 1d. When the driver 1d moves in the striking direction and contacts the shutter 7, the wide portion 7b is supported by the downstream side bearing surface 2f of the guide hole 2d in the striking direction. Therefore, the load of the driver 1d can be dispersed and transmitted to the downstream side bearing surface 2f of the guide hole 2d. Accordingly, the strike of the driver 1d can be supported by the shutter 7 and the downstream side bearing surface 2f of the guide hole 2d.

[0060] like Fig.14 As shown in FIG. 1 , when the driver 1d moves in the striking direction and contacts the shutter 7, the shutter 7 is supported by the upstream side bearing surface 2g and the downstream side bearing surface 2f of the guide hole 2d in the striking direction. For example, when the shutter 7 is struck by the driver 1d and tilted, the shutter 7 is supported in a manner sandwiched between the upstream side bearing surface 2g and the downstream side bearing surface 2f. Therefore, the strike of the driver 1d can be supported by the shutter 7, the upstream side bearing surface 2g and the downstream side bearing surface 2f of the guide hole 2d.

[0061] like Fig.15 As shown, when viewed from the striking direction of the driver 1d, the driver 1d is located on the width center line of the shutter 7. The connecting rod 8 is also located on the width center line of the shutter 7. Accordingly, when the driver 1d contacts the shutter 7, the shutter 7 can support the driver 1d without tilting to one side in the width direction.

[0062] like Figure 2As shown, the driving tool 10 has a machine head 2 formed with a driving channel 2a. A contact arm 11 is movably arranged at the top of the machine head 2. The contact arm 11 moves between a disconnected position protruding from the machine head 2 and a connected position closer to the machine head 2 than the disconnected position. The driving tool 1d strikes the driving member n set in the driving channel 2a. The shutter 7 is arranged on the machine head 2 in a movable manner in a direction orthogonal to the striking direction of the driving tool 1d. The shutter 7 moves between a blocking position and an open position, wherein the blocking position refers to a position where the shutter 7 is located on the moving path of the driving tool 1d; and the open position refers to a position where the shutter 7 retreats from the moving path and allows the movement of the driving tool 1d. Therefore, the shutter 7 moves in a direction orthogonal to the striking direction. Therefore, the setting space of the shutter 7 in the striking direction can be reduced.

[0063] like Figure 2 As shown, the driving tool n is a nail connected to the connecting tool wound in a spiral shape. Therefore, the driving tool n can be mounted in a compactly accommodated state.

[0064] Various modifications can be made to the above-described embodiments. For example, the driving tool 10 is a gas spring type driving tool using gas pressure. Instead, it can also be applied to a mechanical spring type driving tool using elastic force.

[0065] The solenoid holder 5k may be configured not to be connected to the channel member 2c but to be directly connected to the nose portion 2. The solenoid holder 5k may be configured to be connected to the channel member 2c on a surface in a direction different from the supply direction of the driver n.

[0066] The shutter 7 may also be configured to move between the blocking position and the open position by a rotational action. The shutter 7 may also be configured to slide in a direction different from the direction orthogonal to the striking direction. The shutter 7 may also be configured to be connected to the contact arm 11 without being connected by a connecting member. The shutter 7 is exemplified as being located between the driving member n and the driving device 1d. Alternatively, the shutter 7 may be configured to restrict the movement of the driving device 1d by being inserted into a recess or a through hole formed on the driving device 1d, or by engaging with a protrusion formed on the driving device 1d, or by being caught on the rack 1e.

[0067] The position detection sensor 6 may also be configured to be disposed on the driver 1d and used to detect the position of the driver 1d. The position detection sensor 6 may also be configured to detect the standby position of the driver 1d. The position detection sensor 6 may also be configured to be disposed at any position. The controller 19 may also be configured to send a signal to the feeder 5a after detecting the standby position of the driver 1d. The Hall IC 6a may also be configured to be disposed on the wheel portion 3a, and the magnets 6b and 6c may be disposed on the mechanism housing 3b. The Hall IC 6a, the magnets 6b and 6c may also be configured to be disposed on the engagement pin P. The magnets 6b and 6c may also be configured to be inserted into a recess disposed on the wheel portion 3a, for example. Only one magnet may also be disposed. A magnet may also be provided to detect the position of the driver 1d after it moves downward. Accordingly, the rotation of the lifter 3 can be stopped when the driver 1d moves downward.

[0068] The illustrated lifter 3 has an engagement pin P. Instead of this, a pinion-shaped protrusion may be provided. In this case, a pin may be used as the engaged portion L of the driver 1d. The number of the engagement pin P and the engaged portion L may be any number.

[0069] An electric driving tool has a cylindrical nail magazine connected to the tool body. Coil nails are accommodated in the nail magazine. The coil nails are fed one by one to a metal machine head formed with a driving channel through a feeding mechanism. The feeding mechanism has a claw that engages with the nail at the front of the coil nail and a solenoid that reciprocates the claw. The solenoid in the prior art is fixed integrally to the nail magazine. However, since the nail magazine is usually large and connected to the tool body in a cantilevered manner, it is easy to shake. Accordingly, the accuracy of the nail feeding action of the solenoid may deviate. In addition, a structure in which the solenoid is fixed integrally to the metal machine head is considered. However, in this case, the impact during driving is easily transmitted to the solenoid. Or the area of ​​the metal machine head increases, causing the tool body to become heavier.

[0070] Therefore, there has been a need for an electric driving tool having a structure that suppresses the transmission of impact to the solenoid and does not reduce the feeding accuracy of the driving tool.

[0071] like Figure 2 As shown, the driving tool 10 has a nail magazine 16 for accommodating a driving member n connected to a connecting member wound in a spiral shape. A driving channel 2a is formed in the machine head 2. The feeding mechanism 5 supplies the driving member n from the nail magazine 16 to the machine head 2. The solenoid 5h of the feeding mechanism 5 is accommodated in a solenoid holder 5k made of resin. The solenoid holder 5k is fixed to the machine head 2.

[0072] Therefore, the solenoid 5h is fixed to the machine head 2 through the solenoid holder 5k. Therefore, compared with the structure in which the solenoid 5h is installed on the nail magazine 16, the position of the solenoid 5h relative to the machine head 2 can be appropriately configured. As a result, the feeding accuracy of the punching piece n delivered by the solenoid 5h to the machine head 2 is high. In addition, the solenoid holder 5k is made of resin. Therefore, the impact received by the machine head 2 is not easily transmitted to the solenoid 5h. As a result, the solenoid 5h can be prevented from being damaged by the impact received via the machine head 2. In addition, since the solenoid holder 5k is made of resin, it is lighter than the case where it is made of metal.

[0073] like Figure 6 As shown, the driving tool 10 has a channel member 2c, which is used to guide the driving piece n supplied from the nail magazine 16 to the machine head 2. The channel member 2c and the machine head 2 are formed by a single component. Therefore, the driving piece n passes through the same component and is guided to the machine head 2 through the channel member 2c. Moreover, the channel member 2c is made of a metal with higher rigidity than resin. Therefore, the driving piece n can be stably supplied to the machine head 2.

[0074] like Figure 6 As shown, the solenoid holder 5k and the channel component 2c are in contact with each other on a surface parallel to the supply surface of the driving member n supplied from the nail magazine 16 to the machine head 2. And, they are connected to each other on the contacting surfaces. The supply surface of the driving member n has a large area. Therefore, the surface parallel to the supply surface is also relatively large. Therefore, the solenoid holder 5k can be stably connected to the channel component 2c by utilizing the relatively large surface.

[0075] like Figure 6 As shown, the solenoid holder 5k has a pair of protruding portions 5m that protrude toward the nose portion 2. The protruding portions 5m are connected to the channel member 2c. The solenoid holder 5k is made of resin, so it is easy to form a complex structure compared to the nose portion 2 made of metal. Therefore, it is easy to form the protruding portions 5m on the solenoid holder 5k, and it is easy to connect the solenoid holder 5k to the channel member 2c through the protruding portions 5m.

[0076] like Figure 2 As shown, the solenoid holder 5k has a pair of protruding parts 5m, and the pair of protruding parts 5m are configured so that the plunger 5i of the solenoid 5h is located therebetween. The pair of protruding parts 5m are screwed to the channel member 2c. Accordingly, the pair of protruding parts 5m support the movement of the plunger 5i from both sides. Therefore, the feeding accuracy of the driven part n can be improved by the pair of protruding parts 5m.

[0077] like Fig.12As shown, the feeding mechanism 5 has a feeding claw 5b, which is moved by a solenoid 5h to push the driven part n toward the machine head 2. A holder cover 5p covering the solenoid 5h and the feeding claw 5b is mounted on a solenoid holder 5k. Therefore, the solenoid 5h and the feeding claw 5b are protected by the holder cover 5p.

[0078] like Figure 6 As shown, the driving tool 10 has a convex portion 16a and a concave portion 5n, wherein the convex portion 16a is formed on one of the two components, the solenoid holder 5k and the nail magazine 16; the concave portion 5n is formed on the other of the two components and the convex portion 16a is inserted therein in a removable manner. According to this, it is possible to suppress the nail magazine 16 from being greatly offset relative to the solenoid holder 5k. In this way, the driving piece n can be stably supplied from the nail magazine 16 to the machine head 2.

[0079] like Figure 6 As shown, the nail magazine 16 has a convex portion 16a protruding toward the solenoid retainer 5k. The convex portion 16a is inserted between the retainer cover 5p covering the solenoid 5h and the solenoid retainer 5k in a removable manner. Therefore, the convex portion 16a of the nail magazine 16 is supported by the solenoid retainer 5k and the retainer cover 5p in a manner sandwiched between the two components.

[0080] like Figure 2 As shown, the driving tool 10 has a driver 1d for striking a driven object n disposed in a driving passage 2a. A piston 1b is connected to the driver 1d. Air pressure is generated in a cylinder 1c by the piston 1b. Therefore, the driver 1d can strike the driven object n by air pressure.

[0081] like Figure 4 As shown in FIG. 1 , the driving tool 10 includes a lifter 3, which is engaged with the driving tool 1d and is used to lift the driving tool 1d. The position detection sensor 6 detects the position of the driving tool 1d or the lifter 3. The controller 19 actuates the solenoid 5h when the lower end of the driving tool 1d is located closer to the cylinder 1c than the driving member n provided in the driving channel 2a based on the signal from the position detection sensor 6. Therefore, the driving member n can be supplied to the driving channel 2a without interfering with the driving tool 1d.

[0082] The solenoid holder 5k may be configured to be directly connected to the machine head 2 instead of being connected to the channel member 2c. The solenoid holder 5k may be configured to be connected to the channel member 2c on a surface in a direction different from the supply direction of the driven component n. In the embodiment, the solenoid holder 5k has a structure in which the extension 5m is connected to the channel member 2c. Instead of this, the channel member 2c may have an extension protruding toward the solenoid holder 5k and be connected to the solenoid holder 5k.

[0083] The various embodiments described in detail with reference to the accompanying drawings are representative examples of the present invention and do not limit the present invention. The detailed description is intended to teach those skilled in the art various ways to create, use and / or implement the present teachings, and does not limit the scope of the present invention. Moreover, the additional technical features and teachings described above can be applied and / or used alone or in combination with other technical features and teachings to provide an improved electric driving tool and / or its manufacturing method and use method.

Claims

1. An electric driving tool, characterized in that: It has a machine head, a contact arm and a driver, wherein: The machine head is formed with a driving channel; The contact arm is movably disposed at the top end of the nose portion and moves between an off position protruding from the nose portion and an on position closer to the nose portion than the off position; The driver strikes a driving member disposed in the driving channel.

2. The electric driving tool according to claim 1, characterized in that: It has a limiting component and a connecting component, wherein The limiting member moves between a blocking position located on a moving path of the driver and an open position retreated from the moving path to allow the driver to move; The connecting component connects the contact arm and the limiting component, and is linked with the movement of the contact arm from the disconnected position to the connected position to move the limiting component from the blocked position to the open position, and is linked with the movement of the contact arm from the connected position to the disconnected position to move the limiting component from the open position to the blocked position.

3. The electric driving tool according to claim 2, characterized in that: The connecting member has a first end and a second end, wherein the first end is rotatably connected to the contact arm; and the second end is rotatably connected to the limiting member.

4. The electric driving tool according to claim 2 or 3, characterized in that: The restricting member moves in a direction different from a moving direction in which the contact arm moves between the ON position and the OFF position.

5. The electric driving tool according to any one of claims 1 to 4, characterized in that: The machine head has a guide hole orthogonal to the striking direction of the driver. The restricting member is inserted into the guide hole to slide along the guide hole.

6. The electric driving tool according to claim 5, characterized in that: The limiting member has a wide portion formed to be wider than the width of the driver. When the driver moves in the striking direction and contacts the restricting member, the wide portion is supported by the receiving surface of the guide hole on the downstream side in the striking direction.

7. The electric driving tool according to claim 6, characterized in that: When the driver moves in the striking direction and contacts the limiting member, the limiting member is cooperatively supported by the upstream side receiving surface and the downstream side receiving surface of the guide hole in the striking direction.

8. The electric driving tool according to claim 2, characterized in that: The driver is located on a width center line of the limiting component extending along a striking direction of the driver, and the connecting component is located on the width center line of the limiting component.

9. The electric driving tool according to claim 1, characterized in that: A limiting component is provided on the machine head in a manner that it can move in a direction orthogonal to the striking direction of the driver, and moves between a blocking position located on the moving path of the driver and an open position retreating from the moving path to allow the driver to move.

10. The electric driving tool according to any one of claims 1 to 9, characterized in that: It has a nail magazine, the machine head, a feeder and a solenoid holder, wherein: The nail magazine is used to accommodate the driven parts connected to the connecting parts rolled into a spiral shape; The head portion is made of metal; The feeder has a solenoid for loading the driven parts from the nail magazine into the machine head; The solenoid holder is made of resin, is used to accommodate the solenoid and is fixed to the machine head.

Images