WO2013161909A1 - Driving tool - Google Patents

Abstract

[Problem] To provide, in a driving tool, an effective technique for securing the work area. [Solution] The driving tool (100) comprises a driving piston (123) that has a driving section (125) that drives the material to be driven, a driving cylinder (121), a battery (110), a motor (111), a compressed air-generating device (130) that is driven by the motor (111), a nozzle (157), an air passage (155) that conducts the compressed air to the nozzle (157), and a switching valve (153) capable of switching between an open position that opens the air passage (155) and a closed position that closes same. The compressed air is used for the action of driving the material being driven when the switching valve (153) is switched to the closed position, and is discharged from the nozzle (157) when the switching valve (153) is moved to the open position.

Description

Driving tool

The present invention relates to a driving tool for performing a driving operation of a workpiece such as a nail on a workpiece.

Japanese Patent Application Laid-Open No. 2011-25363 discloses an electro-pneumatic driving tool equipped with an electric motor driven by a battery and a compression device driven by the electric motor. The driving tool supplies the compressed air generated by the compression device into the driving cylinder and operates the driving mechanism with the supplied compressed air to drive the material to be driven.

As described above, according to the driving tool equipped with the electric motor driven by the battery and the compression device, the power cord for supplying power from the external power source and the air hose for supplying compressed air from the external air supply source are unnecessary. . Thereby, workability | operativity at the time of performing the operation | work with a driving tool improves.

However, in the driving tool, it is necessary to secure a work area in which the material to be driven is driven, and there is room for improvement in the technology related to securing the work area.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a technique effective for securing a work area in a driving tool.

In order to achieve the above object, preferred embodiments of the driving tool according to the present invention include a driving cylinder, a driving piston, a battery, a motor, a compressed air generating device, a nozzle, an air passage, and a switching valve. Have. The driving piston includes a sliding portion that is slidably accommodated in the driving cylinder, and a long driving portion that is connected to the sliding portion and drives a material to be driven. The compressed air generating device generates compressed air by being driven by a motor. The driving piston is linearly moved by the compressed air generated by the compressed air generating device, and the driven material is driven by the driving portion of the driving piston. The “driving tool” in the present invention typically corresponds to a nailing machine or a tucker, and the “placed material” is a straight bar having a sharp tip, Widely includes those having a shade in the part, those not having a shade, and U-shaped staples.

Furthermore, the air passage is configured to guide the compressed air generated by the compressed air generating device to the nozzle. The switching valve is configured to be switchable between an open position for opening the air passage and a closed position for closing. The compressed air generated by the compressed air generating device is used for a driving operation in which the driving piston drives the driven material when the switching valve is switched to the closed position, and the switching valve is switched to the open position. In such a case, the nozzle is discharged from the nozzle. In addition, it is not restricted to the structure which discharge | releases the compressed air produced | generated by the compressed air production | generation apparatus from the nozzle, It is preferable that it is comprised so that the air in a compressed air production | generation apparatus can be discharge | released. Moreover, it is preferable that the switching valve is comprised with the solenoid valve.

According to the present invention, in the driving tool, when the switching valve is switched to the open position for opening the air passage, the compressed air generated by the compressed air generating device is released from the nozzle. For example, the work area is cleaned by blowing the released air toward a work area that is a placement area of the work material in the work material.

According to the further form of the driving tool which concerns on this invention, the switching valve is comprised so that it may function also as an air release valve | bulb which discharge | releases the compressed air produced | generated by the compressed air production | generation apparatus to air | atmosphere.
According to this embodiment, for example, when the driving operation is stopped halfway, the compressed air generated by the compressed air generating device is released to the atmosphere by switching the switching valve to the open position. This suppresses the compressed air remaining in the compressed air generation device from acting as an overload on the compressed air generation device, the motor, and the like when the subsequent driving operation is performed.

According to the further form of the driving tool which concerns on this invention, it has a control member which controls a drive and a stop of a motor. The atmosphere release valve is configured to be switched to the open position in accordance with a predetermined operation state of the internal mechanism defined by the battery, the motor, the compressed air generation device, the driving piston, and the control member. The “predetermined operation state” in the present invention typically means that when all of the internal mechanisms are in a steady operation state, and at least one of the internal mechanisms is an unsteady operation state different from the steady operation state. Any of the operating states is preferably included.
According to this aspect, the air release valve can be switched when the internal mechanism is in a predetermined operation state.

According to the further form of the driving tool according to the present invention, the driving cylinder slides in the direction opposite to the driving direction in which the driven material moves when the driven material is driven by the driving portion in the driving cylinder. It is configured to generate compressed air therein.
According to this aspect, the driving cylinder and the driving piston as the driving mechanism for the driven material also operate as the compressed air generating device. Therefore, the driving tool can be downsized.

According to the further form of the driving tool according to the present invention, an intermediate body that is driven by a motor and linearly moves in a direction opposite to the driving direction of the driven material, and the driving piston is connected to the intermediate body. The coupling mechanism is capable of releasing the coupling and is slidably accommodated in the driving cylinder, and the compressed air is moved into the driving cylinder by moving in the direction opposite to the driving direction of the driven material together with the intermediate body. It further has a compression piston to be generated, and a switching mechanism that can be switched between a connection state in which the connection mechanism connects the intermediate body and the driving piston, and a connection release state in which the connection is released. When the intermediate mechanism is moved in the direction opposite to the driving direction and the connecting mechanism is switched to the connected state, the driving piston and the compression piston move together with the intermediate body to move into the driving cylinder. The driving piston generates compressed air for driving the material to be driven. On the other hand, when the coupling mechanism is switched to the uncoupled state, only the compression piston moves with the intermediate body so as to generate compressed air to be discharged from the nozzle into the driving cylinder. . That is, the driving piston is not moved together with the intermediate body.
According to this aspect, when releasing air from the nozzle, the connection of the driving piston to the intermediate body is released. Therefore, the driving piston is not moved together with the intermediate body, and malfunction of the driving piston can be prevented.

According to the further form of the driving tool which concerns on this invention, a compressed air production | generation apparatus has a compression cylinder different from a driving cylinder, and the compression piston which is driven by a motor and can slide in a compression cylinder. The compression piston is configured to generate compressed air in the compression cylinder by sliding in the compression cylinder.
According to this aspect, since the compression cylinder different from the driving cylinder is provided, the structure of each component is simplified. Furthermore, maintenance of each component is simplified.

According to the further form of the driving tool which concerns on this invention, the driving cylinder and the compression cylinder are arrange | positioned so that a major axis direction may become mutually parallel. The air passage is arranged so as to extend between the driving cylinder and the compression cylinder. The “air passage” in the present embodiment is typically preferably formed by a tubular member such as a pipe or a hose.
According to this aspect, the air passage is rationally arranged by arranging the tubular member between the driving cylinder and the compression cylinder.

According to the further form of the driving tool which concerns on this invention, it has a guide member for guiding the material to be driven driven by the driving part. The nozzle is disposed in the vicinity of the guide member.
According to this aspect, it is possible to blow away dust or dust generated when the driving pistons drive the materials to be driven and the adhesive bonding the materials to be driven is peeled off.

According to the further form of the driving tool which concerns on this invention, the compressed air discharge | released from a nozzle is discharge | released intermittently by the continuous discharge aspect continuously discharged | emitted by predetermined pressure, and the pressure higher than predetermined pressure. It is configured to be switched between the intermittent discharge mode and discharged.
According to this embodiment, the discharge amount of compressed air, the wind speed, the discharge duration time, and the like are appropriately switched according to the amount of dust in the area to be cleaned and the like.

According to the further form of the driving tool according to the present invention, the biasing member and the biasing member are always biased in the driving direction and resist the biasing force of the biasing member when pressed against the workpiece. The contact arm is moved in the direction opposite to the driving direction, and the connecting member connects the contact arm and the switching valve. The switching valve is switched to an open position that opens the air passage when the contact arm moves in the driving direction, and to a closed position that closes the air passage when the contact arm moves in the direction opposite to the driving direction. It is configured to be switched.
According to this aspect, since the switching valve and the contact arm are connected by the connecting member, the switching valve is mechanically switched. Therefore, a reliable operation of the switching valve is realized.

ADVANTAGE OF THE INVENTION According to this invention, the effective technique regarding ensuring of a working area is provided in a driving tool.
Other features, actions, and advantages of the present invention can be readily understood with reference to the specification, claims, and accompanying drawings.

It is a fragmentary sectional view showing the whole nailing machine composition concerning a 1st embodiment, and shows the time of nailing. It is a fragmentary sectional view which shows the whole structure of the nail driver which concerns on 1st Embodiment, and shows the time of cleaning work. It is the sectional view on the AA line of FIG. It is a fragmentary sectional view which shows the whole structure of the nail driver which concerns on 2nd Embodiment. It is a fragmentary sectional view which shows the whole structure of the nailing machine which concerns on 2nd Embodiment, and shows the time of nailing. It is a fragmentary sectional view which shows the whole structure of the nail driver which concerns on 2nd Embodiment, and shows the time of cleaning work. FIG. 5 is a left side view of FIG. 4. FIG. 5 is an enlarged view of part B of FIG. 4, showing an engagement allowable state in which the locking member is allowed to engage with the driver 123. The engaging member is in an incapable engagement state where the engagement with the driver 123 is impossible. It is explanatory drawing which shows a movement of a cylindrical moving body, and a cylindrical moving body moves in order of (A) (B) (C) (D) (E). It is a perspective view which shows a compression piston. It is an external view which shows the whole structure of the nail driver which concerns on 3rd Embodiment. It is C arrow directional view of FIG. FIG. 14 is a cross-sectional view taken along line DD of FIG. 13 and shows a state where the on-off valve is located at the open position. The state where an on-off valve is located in a closed position is shown. It is a perspective view which shows the connection structure of an on-off valve and a contact arm.

The configurations and methods according to the above and the following description are separately or separately from other configurations and methods in order to realize the manufacture and use of the “driving tool” according to the present invention and the use of the components of the “driving tool”. Can be used in combination. Exemplary embodiments of the present invention include these combinations and will be described in detail with reference to the accompanying drawings. The following detailed description is only to teach those skilled in the art with detailed information to implement preferred embodiments of the invention, and the scope of the invention is not limited by the detailed description, but is limited by the scope of the claims. It is determined based on the description. For this reason, combinations of configurations and method steps in the following detailed description are not all essential to implement the present invention in a broad sense, but are described in detail with reference numerals in the accompanying drawings. However, only representative embodiments of the present invention are disclosed.
(First embodiment)
Hereinafter, the first embodiment will be described in detail with reference to FIGS. This embodiment will be described using an electro-pneumatic nailer as an example of a driving tool. As shown in FIG. 1, the nailing machine 100 generally includes a main body 101 as a tool main body, a long handle portion 103 gripped by an operator, and a nail n as a material to be driven. The magazine 105 is mainly loaded. The handle portion 103 is directed from the side surface portion on the one end side (upper side in FIG. 1) of the main body portion 101 in the major axis direction (vertical direction in FIG. 1) to the side (right side in FIG. 1) intersecting the major axis direction. It is connected so as to extend. A rechargeable battery pack 110 that supplies electric current to the electric motor 111 is attached to the distal end portion of the handle portion 103. FIG. 1 shows the nailing machine 100 in a downward state, that is, a state in which the distal end portion (lower end portion in FIG. 1) of the main body 101 is directed to the workpiece. Therefore, the downward direction in FIG. 1 is the driving direction (firing direction) of the nail n. The electric motor 111 corresponds to the “motor” in the present invention, and the battery pack 110 is an implementation configuration example corresponding to the “battery” in the present invention.

As shown in FIG. 1, the main body 101 is mainly composed of a main body housing 107 and a motor housing 109. In the main body housing 107, a driving cylinder 121 of the nail driving mechanism 120 and a compression cylinder 131 of the compression device 130 are integrally formed. An electric motor 111 is accommodated in the motor housing 109. The motor housing 109 is disposed substantially parallel to the handle portion 103 at a predetermined interval on the front end side (lower end side) of the main body housing 107. One end of the motor housing 109 is connected to the main body housing 107, and the other end is connected to the tip of the handle portion 103.

A driver guide 141 that constitutes an injection port for the nail n is disposed at the tip of the driving cylinder 121 in the main body housing 107. The magazine 105 is arranged substantially in parallel with the motor housing 109 in a state in which the magazine 105 is close to the motor housing 109 at the tip of the main body 101. The magazine 105 has one end connected to the driver guide 141 and the other end connected to the motor housing 109. The magazine 105 is provided with a pusher plate (not shown) for pushing the nail n toward the driver guide 141, and the nail n is supplied to the driving passage 141 a of the driver guide 141 one by one by this pusher plate. It is comprised so that. For convenience of explanation, the front end side (lower side in FIG. 1) of the main body 103 is referred to as front or front, and the opposite side to the front end side is referred to as rear or rear. Further, the main body housing 107 side (left side in FIG. 1) is referred to as upper or upper side, and the battery 110 side (right side in FIG. 1) is referred to as lower or lower side.

As shown in FIG. 1, the driving cylinder 121 of the nail driving mechanism 120 and the compression cylinder 131 of the compression device 130 are arranged in parallel to each other. In the driving cylinder 121, a driving piston 123 for hitting the nail n is disposed so as to be slidable in the long axis direction. This driving cylinder 121 is an implementation configuration example corresponding to the “driving cylinder” in the present invention. The driving piston 123 mainly includes a columnar piston main body 124 slidably disposed in the driving cylinder 121 and a long driver 125 connected to the piston main body 124 for hitting the nail n. It is configured as. The driving piston 123 moves linearly in the major axis direction of the driving cylinder 121, and the driver 125 moves forward in the driving passage 141a to form the nail n as a driving member. The driving piston 123 corresponds to the “driving piston” in the present invention, the piston main body portion 124 corresponds to the “sliding portion” in the present invention, and the driver 125 corresponds to the “driving portion” in the present invention. It is a structural example. The nail driving mechanism 120 is configured by the driving cylinder 121 and the driving piston 123.

As shown in FIG. 1, a compression piston 133 is slidably disposed in the long axis direction in a compression cylinder 131 of the compression device 130. The compression piston 133 is driven by the electric motor 111 via the crank mechanism 115. The electric motor 111 is disposed in the motor housing 109 so that the rotation axis intersects the long axis direction of the compression cylinder 131. The rotation output of the electric 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 cause the compression piston 133 to reciprocate 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 (upward in FIG. 1) where the volume of the compression chamber 131a is reduced. Is compressed. That is, a reciprocating type compression device mainly composed of a compression cylinder 131, a compression piston 133, and a crank mechanism 115 is used as the compression device 130. The compression cylinder 131 corresponds to the “compression cylinder” in the present invention, and the compression piston 133 is an implementation configuration example corresponding to the “compression piston” in the present invention.

As shown in FIG. 1, the crank mechanism 115 is mainly composed of a crankshaft 115a, an eccentric pin 115b, and a connecting rod 115c. The crankshaft 115 a is decelerated and rotated by the gear reduction mechanism 113. The eccentric pin 115b is provided at a position eccentric from the rotation center of the crankshaft 115a. The connecting rod 115c has one end connected to the eccentric pin 115b so as to be relatively rotatable, and the other end connected to the compression piston 133 so as to be relatively rotatable. The crank mechanism 115 is accommodated in the main body housing 107 in the front region of the compression cylinder 131.

The electric motor 111 is driven by a trigger 103 a provided rotatably on the handle portion 103 with a support shaft 103 c as a fulcrum and a driver guide 141 as a contact arm provided in a distal end region of the main body 101. Is controlled. That is, the handle 103 is provided with a trigger 103a that can be operated with fingers and a trigger switch 103b that is operated by the trigger 103a. The trigger switch 103b is switched to an on state when the trigger 103a is pulled, and is switched to an off state when the pull operation is released.

On the other hand, the driver guide 141 as a contact arm is attached so as to be movable in the long axis direction (striking direction) of the nail n, and is biased toward the tip (front) side by a spring (not shown) as a biasing member. ing. When the driver guide 141 is positioned forward, the contact arm switch (not shown) is turned off, and when the driver guide 141 is positioned rearward, the contact arm switch is turned on. The electric motor 111 is energized and driven when both the trigger switch 103b and the contact arm switch are switched on. On the other hand, driving is stopped when either or both of the trigger switch 103b and the contact arm switch are switched to the OFF state. This driver guide 141 is an implementation configuration example corresponding to the “contact arm” in the present invention.

As shown in FIG. 1, the main body housing 107 communicates with a communication passage 135 that allows the compression chamber 131 a of the compression cylinder 131 and the inside of the driving cylinder 121 to communicate with each other, and allows the compression cylinder 131 and the driving cylinder 121 to communicate with each other. A main valve 137 that cuts off the communication is provided. As shown in FIG. 1, the nailing machine 100 has an initial position in which the driving piston 123 is positioned at the rear end position (upper end position in FIG. 1) and the compression piston 133 is positioned at the front end position (bottom dead center). It has been established. The main valve 137 is a normally closed type solenoid valve that closes when the power is off. The main valve 137 opens the communication path 135 when the compression piston 133 is near the rear end position (top dead center). Therefore, when the main valve 137 opens the communication path 135, the compressed air in the compression chamber 131 a compressed by the compression piston 133 is supplied to the cylinder chamber of the driving cylinder 121. Thereby, the driving piston 123 is moved forward by the compressed air, the driver 125 hits the nail n, and the nail n is driven into the workpiece.

When the compression piston 133 after the compression operation moves forward, the volume of the compression chamber 131a is increased, whereby the pressure in the compression chamber 131a and the driving cylinder 121 is reduced, and the driving piston 123 is moved by the reduced pressure air. Moved backwards. Thus, in the nailing machine 100, when the compression piston 133 reciprocates once, the driver 125 of the driving piston 123 performs one nail driving operation.

Next, the operation and usage of the nailing machine 100 will be described. In the initial state shown in FIG. 1, when the driver guide 141 is pressed against the workpiece and the contact arm switch is turned on, and the trigger 103a is pulled and the trigger switch 103b is turned on, the electric motor A current is supplied to 111 and driven. As a result, the crank mechanism 115 is driven via the gear reduction mechanism 113, and the compression piston 133 starts moving backward. At this time, the main valve 137 closes the communication path 135. Therefore, the volume of the compression chamber 131a is reduced, and the air in the compression chamber 131a is compressed.

When the compression piston 133 is near the rear end position (top dead center), the main valve 137 is energized to open the communication path 135. Thereby, the compressed air in the compression chamber 131a is supplied into the driving cylinder 121 through the communication path 135, and the driving piston 123 is moved forward by the compressed air. Then, the driver 125 of the driving piston 123 moved forward hits the nail n of the driving passage 141a of the driver guide 141, and the nail is driven into the workpiece.

When the compression piston 133 at the rear end position is moved forward, the volume of the compression chamber 131a is increased and the pressure of the air in the compression chamber 131a is reduced. As a result, the driving piston 123 is sucked and returned to the initial position before the rear impact.

When the compression piston 133 returns to the position before the compression start, even if the trigger switch 103b and the contact arm switch are maintained in the ON state, the power supply to the electric motor 111 is cut off and the electric motor 111 is stopped. Simultaneously with the interruption of energization to the electric motor 111, the energization to the main valve 137 is interrupted, and the main valve 137 closes the communication path 135. As described above, one cycle of the nail driving operation is completed.

For energization and interruption of energization of the electric motor 111 and energization and interruption of energization of the main valve 137, for example, a position sensor for detecting the rotation angle of the crankshaft 115a or the position of the eccentric pin 115b is provided. It is controlled by the control device based on the detection result of the position sensor.

The nailing machine 100 configured as described above moves the driving piston 123 linearly using compressed air by driving the compression device 130 using the electric motor 111 that drives the battery pack 110 as a power source. . This eliminates the need for a power cord for supplying external power to the nailing machine and an air hose for supplying compressed air from an external compressed air source to the nailing machine. Therefore, a cordless and hoseless nailer is configured. A nailing machine with improved usability is provided.

Furthermore, the nail driver 100 includes an air duster 150 that can discharge air to clean the work area and the like. As shown in FIGS. 1 and 2, the air duster 150 mainly includes an air discharge port 151, an on-off valve 153, a tubular member 155, and a nozzle 157. The air discharge port 151 is formed on the rear end side of the compression cylinder 131. The on-off valve 153 is configured to open and close the air discharge port 151. The tubular member 155 is formed by a pipe, a hose, or the like that guides air in the compression chamber 131a of the compression device 130 to the nozzle 157 when the air discharge port 151 is opened. The nozzle 157 is configured to discharge air toward the front. The on-off valve 153 corresponds to the “switching valve” in the present invention, the tubular member 155 corresponds to the “air passage” in the present invention, and the nozzle 157 corresponds to the “nozzle” in the present invention. is there.

The on-off valve 153 is a normally open type solenoid valve that opens the air outlet 151 when not energized. That is, the on-off valve 153 is located at a position where the valve body closes the air discharge port 151 (see FIG. 1) when energized, and a position where the valve body opens the air discharge port 151 (see FIG. 2) when not energized. Located in. The position where the air outlet 151 is closed corresponds to the “closed position” in the present invention, and the position where the air outlet 151 is opened corresponds to the “open position” in the present invention. The nozzle 157 is disposed in the vicinity of the driver guide 141 and is set so that air is discharged substantially in parallel with the driving direction of the nail. As shown in FIG. 3, the tubular member 155 is fixedly disposed in the state of being close to the cylinders so as to be in contact with the outer surfaces of the driving cylinder 121 and the compression cylinder 131.

As shown in FIG. 1, a manually operated on-off valve switch 156 for opening and closing the on-off valve 153 is provided near the trigger 103 a in the handle portion 103. The on-off valve switch 156 is configured as a push button switch or a slide switch. When the on / off valve switch 156 is operated to the open side, the energization to the on / off valve 153 is cut off to open the air discharge port 151, and the operation to the close side is applied to the on / off valve 153 to close the air discharge port 151. . In addition, when the on / off valve 153 is operated to open, the main valve 137 is controlled by the controller so that the main valve 137 does not work.

Furthermore, as shown in FIG. 1, the discharge mode switching which switches the discharge mode of the air discharge | released from the nozzle 157 between the continuous discharge mode which discharge | releases air continuously, and the intermittent discharge mode which discharge | releases air intermittently. A switch 158 is arranged. The discharge mode changeover switch 158 is disposed adjacent to the opening / closing valve switch 156 in the handle portion 103. When the release mode changeover switch 158 is switched to the continuous release mode, the on-off valve 153 is continuously opened immediately after the compression piston 133 is started. On the other hand, when the release mode changeover switch 158 is switched to the intermittent release mode, the on-off valve 153 opens and closes intermittently while the compression piston 133 is moved backward by a predetermined amount and the pressure in the compression chamber 131a is increased. Configured to do. Note that the operation timing of the on-off valve 153 in the intermittent release mode is determined based on detection results by a pressure sensor that detects the pressure of air in the compression chamber 131a and a position sensor that detects the position of the compression piston 133.

When performing the nailing operation, the on-off valve switch 156 is switched to the closing side. Thereby, an electric current is supplied to the on-off valve 153 and the air outlet 151 is closed. A nailing operation is performed by pressing the driver guide 141 against the workpiece and pulling the trigger 103a while the air discharge port 151 is closed.

On the other hand, when the work area is cleaned using the air duster 150 before or after the nailing operation, the on-off valve switch 156 is operated to the open side. At this time, since the on-off valve 153 is not energized, the on-off valve 153 opens the air discharge port 151. The compression device 130 is driven by driving the electric motor 111 by pulling the trigger 103a in a state where the air discharge port 151 is opened. As a result, the air in the compression chamber 131a is discharged forward from the nozzle 157 via the tubular member 155. As a result, the work area is cleaned by blowing away dust, dirt, etc., present on the surface of the workpiece to be nailed. At this time, since the main valve 137 is configured not to work, the nail driving operation is not performed.

In the case of using the air duster 150, when the discharge mode changeover switch 158 is switched to the continuous discharge mode, the on-off valve 153 is continuously opened immediately after the compression piston 133 is started, so that the air in the compression chamber 131a. The air at a low wind speed is continuously discharged from the nozzle 157. On the other hand, when the discharge mode changeover switch 158 is switched to the intermittent discharge mode, the on-off valve 153 opens and closes intermittently while the pressure of the air in the compression chamber 131a is increased. Therefore, air with a high wind speed is intermittently discharged from the nozzle 157. Therefore, the wind speed of the released air can be switched by appropriately switching the discharge mode corresponding to the situation to be cleaned.

Further, since the tubular member 155 is disposed close to the driving cylinder 121 and the compression cylinder 131, the tubular member 155, the driving cylinder 121, and the compression cylinder 131 are rationally disposed.

By the way, in the nailing machine 100, at least one of the internal mechanisms related to the nailing operation of the nailing machine 100 constituted by the trigger 103a, the electric motor 111, the compression device 130, the nail driving mechanism 120, etc. is normal. It is conceivable that the operation state deviates from the allowable range as the operation state (hereinafter referred to as an unsteady operation state). For example, in the compression process of the compression device 130, it is conceivable that the operator releases the pressing of the driver guide 141 against the workpiece or cancels the pulling operation of the trigger 103a. That is, the nailing operation may be stopped halfway. In this case, the electric motor 111 stops in a state where compressed air is generated in the compression chamber 131a. Therefore, if the main valve 137 is inadvertently opened for some reason, the compressed air in the compression chamber 131a is supplied to the driving cylinder 121, which may cause the driving operation unexpectedly. On the other hand, when the main valve 137 is not opened, an excessive load acts on the electric motor 111 or the compression device 130 due to the compressed air remaining in the compression chamber 131a during the next nail driving operation. there is a possibility.

Therefore, when the operator interrupts the nail driving operation in the compression process of the compression device 130 in the nail driving state, the compressed air in the compression chamber 131a is opened through the tubular member 155 and the nozzle 157 by opening the air discharge port 151. To the atmosphere. Thereby, the energy transmission to the driving piston 123 is cut off. That is, when the internal mechanism of the nailing machine 100 is in an unsteady operation state, the on-off valve 153 operates as an atmosphere release valve that releases compressed air to the atmosphere. This on-off valve 153 is an implementation configuration example corresponding to the “atmospheric release valve” in the present invention. Further, in the compression process of the compression device 130, when the operator releases the pulling operation of the trigger 103a or when the pressing operation of the driver guide 141 against the workpiece is released, the “predetermined operation of the internal mechanism” It is the implementation structural example corresponding to "state".

In the state where the on-off valve switch 156 is switched to the closing side, the trigger 103a is pulled to turn on the trigger switch 103b, and the driver guide 141 is pressed against the workpiece to turn on the contact arm switch. When the switch is switched to, current is supplied to the on-off valve 153, and when either the trigger switch 103b or the contact arm switch is switched off, the supply of current to the on-off valve 153 is cut off. The trigger 103a, the trigger switch 103b, the driver guide 141, and the contact arm switch are implementation examples corresponding to the “control member” in the present invention.

Therefore, when the operator pushes the driver guide 141 against the workpiece and pulls the trigger 103a so as to perform the nailing operation, both the contact arm switch and the trigger switch 103b are turned on. At this time, the on-off valve 153 maintains a closed state. For this reason, when the contact arm switch and the trigger switch 103b are both turned on, the electric motor 111 is supplied with current and driven. Thereby, a series of nailing operations are performed via the compression device 130 and the nail driving mechanism 120.

On the other hand, when the operator cancels the pulling operation of the trigger 103a or the pressing operation of the driver guide 141 against the workpiece is canceled during the nailing operation, the trigger switch 103b or the contact arm switch is turned off. The state is switched and the electric motor 111 stops. In this case, when the trigger switch 103b or the contact arm switch is turned off, the supply of current to the on-off valve 153 is cut off, and the on-off valve 153 is moved to a position where the air discharge port 151 is opened. For this reason, the compressed air in the compression chamber 131a is released to the atmosphere through the nozzle 157 of the tubular member 155, and the energy transmission from the compression device 130 to the nail driving mechanism 120 is cut off. Therefore, even when the main valve 137 is opened while the compression device 130 is stopped in the middle of the compression process, the nailing operation by the driver 125 is not performed. Therefore, by switching the on-off valve 153 to the open side, the driving operation of the nail n is invalidated, thereby preventing an unexpected driving operation of the nail n. Further, it is possible to suppress an excessive load from acting on the electric motor 111 or the compression device 130 due to the compressed air remaining in the compression chamber 131a during the next driving operation. Therefore, the electric motor 111 or the compression device 130 is protected from overload.

Further, when the nail driving is finished, when the position sensor detects that the driving piston 123 has returned to the initial position before the nail driving operation, the control device opens the on-off valve 153 based on the detection signal of the position sensor. Switch. Thus, since the on-off valve 153 is switched to the open side after the return of the driving piston 123 to the initial position, the air pressure in the compression chamber 131a and the driving cylinder 121 is low until the driving piston 123 returns to the initial position. Ensure state is maintained. That is, in the steady operation state, the on-off valve 153 maintains the normal cycle of the nail driving operation. Note that the switching of the on-off valve 153 to the open side by the controller continues the pulling operation of the trigger 103a by the operator and the pressing operation of the driver guide 141 against the workpiece, so that both the trigger switch 103b and the contact arm are turned on. Even if there is.

In addition, although the above 1st Embodiment demonstrated the case where the tubular member 155 was provided in the fixed form, it is not restricted to this. For example, at least a part of the tubular member 155 is formed by a hose, and the nozzle 157 side of the tubular member 155 is detachably attached to the outer surface of the impact cylinder 121 or the outer surface of the compression cylinder 131 via a hose clamp. Also good. And in the state which removed the tubular member 155, the structure which can change the direction of the nozzle 157 arbitrarily may be sufficient.

(Second Embodiment)
Next, a second embodiment will be described in detail with reference to FIGS. The second embodiment mainly differs in the configuration of the compressed air generating means, and the configuration other than this point is configured in the same manner as in the first embodiment. For this reason, it demonstrates mainly about the production | generation means of compressed air, about the other structural member, the code | symbol same as the code | symbol used in 1st Embodiment is attached | subjected and the description is abbreviate | omitted.

The driving mechanism 120 according to the second embodiment is a compressed piston that generates compressed air by sliding in the driving cylinder 121 and reducing the volume of the cylinder chamber 122 in addition to the driving piston 123 in the driving cylinder 121. 161 is configured as a double piston structure in which 161 is arranged. The compressed piston 161 and the driving cylinder 121 constitute the “compressed air generating device” in the present invention. The compression piston 161 is moved together with the driving piston 123 through the cylindrical moving body 167 linearly driven by the crank mechanism 181 driven by the electric motor 111 in the driving cylinder 121 to the side opposite to the driving direction of the nail, Thereby, the air in the cylinder chamber 122 is compressed.

As shown in FIGS. 4 and 11, the compression piston 161 is housed in the driving cylinder 121 and is slidable in the long axis direction of the driving cylinder 121, and the piston main body 162. This is configured as a cylindrical piston having a substantially cylindrical cylindrical portion 163 extending from the peripheral edge portion to the distal end side in the long axis direction of the main body portion 101. The driving piston 123 is disposed on the front surface of the piston main body 162 of the compression piston 161. The driving piston 123 is provided integrally with the disc-shaped piston main body 124 that can be relatively moved in the long axis direction within the cylindrical portion 163 of the compression piston 161, and hits the nail. It is comprised with the elongate rod-shaped driver 125 for operate | moving. The driving piston 123 moves linearly in the long axis direction of the driving cylinder 121, and the driver 125 moves forward in the driving passage 141a of the driver guide 141 to drive a nail. That is, the driver 125 functions as an operating member for driving a nail.

A cylindrical moving body 167 for moving the compression piston 161 is disposed outside the driving cylinder 121. The cylindrical moving body 167 is arranged to move the compression piston 161 to the side where the volume of the cylinder chamber 122 is reduced, that is, to the rear. The cylindrical moving body 167 is provided so as to be movable in the long axis direction on the outer side of the driving cylinder 121, and is disposed on the outer side of the cylindrical portion 163 of the compression piston 161. A piston receiving portion 168 having a radial plane intersecting the major axis direction is formed at the front end portion of the cylindrical moving body 167. The piston receiving portion 168 is in contact with the end of the cylindrical portion 163 of the compression piston 161. For this reason, when the cylindrical moving body 167 is linearly moved to the rear side of the driving cylinder 121, the compression piston 161 moves together with the cylindrical moving body 167, thereby reducing the volume of the cylinder chamber 122. The air in the chamber 122 is compressed. This cylindrical moving body 167 is an implementation structural example corresponding to the “intermediate body” in the present invention.

A first compression coil spring 165 is disposed outside the cylindrical portion 163 of the compression piston 161. One end of the first compression coil spring 165 contacts the front end of the driving cylinder 121, and the other end contacts a spring receiving portion 163 a formed on the outer periphery of the front end of the cylindrical portion 163. Therefore, the compression piston 161 is constantly urged toward the distal end side in the major axis direction of the main body 101 by the first compression coil spring 165. Thereby, the cylindrical part 163 abuts stably on the piston receiving part 168 of the cylindrical moving body 167. The compression piston 161 is moved backward against the urging force of the first compression coil spring 165.

Further, a second compression coil spring 169 is disposed outside the driving cylinder 121. One end of the second compression coil spring 169 abuts on a spring receiving portion 121 a formed at the rear portion of the driving cylinder 121, and the other end abuts on a rear end portion of the cylindrical moving body 167. Accordingly, the cylindrical moving body 167 is constantly urged toward the distal end side in the long axis direction of the main body 101 by the second compression coil spring 169. As a result, the piston receiving portion 168 is held in contact with the wall surface 107 a in the direction intersecting the long axis direction of the main body housing 107. This position is set as the initial position of the cylindrical moving body 167. The cylindrical moving body 167 is moved backward against the urging force of the second compression coil spring 169.

In the cylindrical portion 163 of the compression piston 161, a stopper member 171 and a buffer material 172 that define the driving position of the driving piston 123 are disposed. The stopper member 171 is connected to the driving cylinder 121 or the housing main body 107. Therefore, the cylindrical portion 163 of the compression piston 161 does not interfere with the portion connecting the stopper member 171 and the driving cylinder 121 or the housing body 107 when the compression piston 161 moves. In addition, a plurality of interference avoidance grooves 163b extending in a predetermined length in the major axis direction are formed in the circumferential direction (see FIG. 11).

As shown in FIG. 8, the driver 125 of the driving piston 123 extends through the opening 168 a formed in the piston receiving portion 168 of the cylindrical moving body 167 toward the driver guide 141. The opening 168a of the piston receiving portion 168 is provided with a locking member 173 for connecting (interlocking) the driving piston 123 with the cylindrical moving body 167 and moving it backward when the cylindrical moving body 167 moves rearward. Yes. The locking member 173 is a lever-like member attached to the opening 168a of the piston receiving portion 168 by a pin 174 so as to be rotatable in the left-right direction in FIG. The locking member 173 engages with the driver 125 penetrating the opening 168 a of the piston receiving portion 168 to connect the cylindrical moving body 167 and the driving piston 123. This locking member 173 is an implementation configuration example corresponding to the “connection mechanism” in the present invention.

A claw portion 173a is formed on one end side (the lower side in FIG. 8) of the locking member 173, and a notch-like engagement portion (not shown) is formed in the driver 125 corresponding to the claw portion 173a. . The claw portion 173a is urged so as to engage with the locking portion of the driver 125 by a locking spring 175 disposed between the locking member 173 and the wall surface of the opening 168a. That is, when the driving piston 123 is located at the initial position, the claw portion 173 a of the locking member 173 is engaged with the engaging portion of the driver 125 by the urging of the locking spring 175.

The locking member 173 can be switched between an engagement-permitted state in which the engagement between the claw portion 173a and the driver 123 is permitted and a disengageable state in which the engagement between the claw portion 173a and the driver 123 is impossible. In other words, the piston receiving portion 168 of the cylindrical moving body 167 is provided with a switching member 179 that switches between the engagement permission state and the engagement disabling state of the locking member 173. The switching member 179 is a lever-like member that can be operated from the outside of the main body housing 107 and has a tip portion disposed in the opening 168 a of the piston receiving portion 168 through the main body housing 107. As shown in FIGS. 8 and 9, the distal end portion of the switching member 179 is movable in a direction intersecting with the major axis direction of the driving cylinder 121. That is, the switching member 179 moves away from the claw portion 173a of the locking member 173 and allows the engagement claw portion 173a to engage with the driver 125 (position shown in FIG. 8) and the claw portion 173a. It is switched by moving between an engagement impossible position (position shown in FIG. 9) where the driver 125 is pressed and released from engagement with the engagement portion. As a result, the driving piston 123 selectively selects one of the connected state engaged with the cylindrical moving body 167 via the locking member 173 and the disconnected state released from the engagement. Switched. This switching member 179 is an implementation structural example corresponding to the "switching mechanism" in this invention.

Therefore, when the switching member 179 is moved to the engagement allowable position, the claw portion 173a is engaged with the engagement portion of the driver 125 by the urging force of the locking spring 175. The driving piston 123 moves in conjunction with the cylindrical moving body 167 and the compression piston 161 by moving the cylindrical moving body 167 rearward in a state where the claw portion 173a and the engaging portion of the driver 125 are engaged. At this time, the compressed air generated in the cylinder chamber 122 by the movement of the compression piston 161 is used for the driving operation in which the driving piston 123 drives the nail. On the other hand, in a state where the switching member 179 is moved to the disengageable position, the engagement between the engagement portion of the driver 125 and the claw portion 173a is released. When the cylindrical moving body 167 is moved rearward in a state where the engagement between the claw portion 173a and the engagement portion of the driver 125 is released, the compression piston 161 alone is moved rearward while the driving piston 123 is held at the initial position. Move to. Further, the claw portion 173 a of the locking member 173 slides on the side surface of the driver 125. At this time, the air in the cylinder chamber 122 is used for cleaning by the air duster 150 by the movement of the compression piston 161.

Next, the crank mechanism 181 that moves the cylindrical moving body 167 linearly will be described. The crank mechanism 181 includes a disc-shaped crank plate 187 rotated by the gear reduction mechanism 183 and two eccentric pins 189a and 189b attached to the crank plate 187. The crank plate 187 has a gear that meshes with and engages with the final gear of the gear reduction mechanism 183. It is housed inside the main body housing 107.

The crank plate 187 is disposed to face the outer surface of the cylindrical moving body 167. The crank plate 187 is supported by a bearing 185 so as to be rotatable about the vertical axis in FIG. 4 intersecting the long axis direction of the driving cylinder 121. The two eccentric pins 189a and 189b are provided at two positions on the side surface of the crank plate 187 facing the cylindrical moving body 167 at a predetermined angle with respect to the rotation center on the same circumference separated by a predetermined distance from the rotation center. Is provided. The eccentric pins 189a and 189b protrude in parallel to each other toward the outer surface of the cylindrical moving body 167. The height of the eccentric pin 189a is higher than the height of the eccentric pin 189b. Hereinafter, one eccentric pin 189a is referred to as a “high eccentric pin”, and the other eccentric pin 189b is referred to as a “low eccentric pin”.

Two engaging protrusions 191 a and 191 b are formed in a region facing the crank plate 187 on the outer surface of the cylindrical moving body 167 at a predetermined interval in the major axis direction of the driving cylinder 121. The engaging protrusions 191a and 191b are formed so as to protrude in the radial direction of the driving cylinder 121, respectively. The height of the engagement protrusion 191a is higher than the height of the engagement protrusion 191b. Hereinafter, one engagement protrusion 191a is referred to as “high engagement protrusion”, and the other engagement protrusion 191b is referred to as “low engagement protrusion”. As a result, the low eccentric pin 189b engages with the high engagement protrusion 191a but does not engage with the low engagement protrusion 191b. That is, only the high eccentric pin 189a is engaged with the low engagement protrusion 191b.

According to such a configuration, the cylindrical moving body 167 is moved backward by the backward moving components of the high eccentric pin 189a and the low eccentric pin 189b accompanying the rotation of the crank plate 187. The state of movement of the cylindrical moving body 167 is shown in FIG. 10, and the cylindrical moving body 167 moves in the order of (A), (B), (C), (D), and (E). 10 indicates the revolution trajectories of the high eccentric pin 189a and the low eccentric pin 189b rotating around the rotation center of the crank plate 187. In FIG. 10, the crank plate 187 is not shown. When the crank plate 187 rotates, the low eccentric pin 189b first engages with the high engagement protrusion 191a to move the cylindrical moving body 167 rearward (see FIGS. 10A and 10B). Until the low eccentric pin 189b moves most rearward, the high eccentric pin 189a engages with the low engagement protrusion 191b to move the cylindrical moving body 167 rearward (FIGS. 10C and 10D). )reference). Therefore, as shown in FIG. 10 (E), when the high eccentric pin 189a moves most backward, the cylindrical moving body 167 is moved to the rearmost position.

As described above, when the crank plate 187 rotates approximately once, the high engagement protrusion 191a is moved rearward by the low eccentric pin 189b, and the low engagement protrusion 191b is moved rearward by the high eccentric pin 189a. Therefore, even if the crank plate 187 has a relatively small diameter, the stroke amount S of the cylindrical moving body 167 can be increased.

In addition, the air duster 150 is comprised mainly by the on-off valve 153, the tubular member 155, and the nozzle 157 similarly to 1st Embodiment. The on-off valve 153 is provided so as to open and close the air discharge port 151 formed on the rear end side of the driving cylinder 121. The tubular member 155 is disposed and fixed so as to extend forward along the outer surface of the driving cylinder 121. A nozzle 157 is provided at the end of the tubular member 155. The nozzle 157 is disposed in the vicinity of the driver guide 141. Moreover, the handle | steering-wheel part 103 is provided with the on-off valve switch 156 and the discharge | emission mode switch 158 relevant to the air duster 150 similarly to 1st Embodiment.

When the nail driving machine 100 performs a nail driving operation, as shown in FIG. 5, the switching member 179 is switched to the engagement allowable position, and the on-off valve switch 156 is switched to the closing side. As a result, current is supplied to the on-off valve 153 to be driven, and the air outlet 151 is closed. When the driver guide 141 is pressed against the workpiece while the air discharge port 151 is closed, and the trigger 103a is pulled, the electric motor 111 is supplied with current and driven. As a result, the crank mechanism 181 is driven via the gear reduction mechanism 183, and the cylindrical moving body 167, the compression piston 161, and the driving piston 123 are moved rearward.

As the compression piston 161 moves backward, the volume of the cylinder chamber 122 of the driving cylinder 121 is reduced, and the air in the cylinder chamber 122 is compressed. As shown in FIG. 10E, when the highly eccentric pin 189a of the crank plate 187 reaches the top dead center which is the rear end position, the cylindrical moving body 167, the compression piston 161 and the driving piston 123 reach the top dead center. As a result, compressed air having a predetermined pressure is generated in the cylinder chamber 122. When the high eccentric pin 189a is disengaged from the low engagement protrusion 191b of the cylindrical moving body 167, the cylindrical moving body 167, the compression piston 161, and the driving piston 123 are all moved forward by the compressed air in the cylinder chamber 112. . The driver 125 of the driving piston 123 moved forward hits the nail disposed in the driving passage 141a of the driver guide 141, and drives the nail into the workpiece. After the driving operation, the driving piston 123, the compression piston 161, and the cylindrical moving body 167 are stopped at the initial position when the piston main body 124 of the driving piston 123 abuts against the buffer material 172.

When the high eccentric pin 189a is disengaged from the low engagement protrusion 191b of the cylindrical moving body 167 from the position of the high eccentric pin 189a shown in FIG. 10 (E), the low eccentric pin 189b becomes the high engagement protrusion 191a, It is located at a position deviating from the movement region of the low engagement protrusion 191b. Thereby, the movement to the front of the cylindrical mobile body 167 is not prevented. That is, as shown in FIG. 10, the high engagement protrusion 191a and the low engagement protrusion 191b of the cylindrical moving body 167 rotate the high eccentric pin 189a and the low eccentric pin 189b that rotate around the rotation axis of the crank plate 187. Of the region, the high eccentric pin 189a and the low eccentric pin 189b are arranged in a region (the right half region in FIG. 10) that moves backward. Therefore, the cylindrical moving body 167, the compression piston 161, and the driving piston 123 are moved forward in a region where both the two eccentric pins 189a and 189b move forward (the left half region in FIG. 10). Carried out while.

On the other hand, when the work area is cleaned using the air duster 150, as shown in FIG. 6, the switching member 179 is switched to the non-engageable position and the on-off valve switch 156 is switched to the open side. At this time, the on-off valve 153 opens the air outlet 151. When the driver guide 141 is pressed against the workpiece while the air discharge port 151 is opened and the trigger 103a is pulled to supply electric current to the electric motor 111 and driven, the cylinder moves via the crank mechanism 181. The body 167 is moved backward. At this time, since the engagement between the driver 125 and the locking member 173 is impossible, the compression piston 161 and the cylindrical moving body 167 are moved rearward while the driving piston 123 is held at the initial position. As the compression piston 161 moves rearward, the volume of the cylinder chamber 122 of the driving cylinder 121 is reduced, and the air in the cylinder chamber 122 is guided to the nozzle 157 through the tubular member 155. As a result, air is discharged forward from the nozzle 157. Therefore, the work area is cleaned by blowing off dust or the like existing on the surface of the workpiece to be nailed.

When the highly eccentric pin 189a of the crank plate 187 is disengaged from the low engagement protrusion 191b of the cylindrical moving body 167, the compression piston 161 and the cylindrical moving body 167 moved rearward are moved to the first compression coil spring 165 and the second compression coil spring. It is returned to the initial position by the biasing force of 169.

In the case of using the air duster 150, as in the first embodiment, when the discharge mode changeover switch 158 is switched to the continuous discharge mode, the on-off valve 153 is continuously opened immediately after the compression piston 161 is started. Therefore, the pressure of the air in the cylinder chamber 122 does not increase, and air with a low wind speed is continuously discharged from the nozzle 157. On the other hand, when the release mode changeover switch 158 is switched to the intermittent release mode, the on-off valve 153 opens and closes intermittently while the pressure of air in the cylinder chamber 122 is increased. Therefore, air with a high wind speed is intermittently discharged from the nozzle 157. Therefore, the wind speed of the released air can be switched by appropriately switching the discharge mode corresponding to the situation to be cleaned.

Also in the second embodiment, as in the case of the first embodiment, the opening / closing valve 153 of the cleaning device 150 has the internal mechanism of the nail driver 100 in an unsteady operation state during the nail driving operation. In some cases, it may be configured to function as an air release valve that releases the compressed air in the cylinder chamber 122 to the atmosphere. With this configuration, it is possible to prevent the compressed air from remaining in the cylinder chamber 122, disable the nail driving operation, and prevent an unexpected driving operation.

In addition, in the above 2nd Embodiment, although the case where the tubular member 155 was provided in fixed form was demonstrated, it is not restricted to this. For example, at least a part of the tubular member 155 may be formed by a hose, and the nozzle 157 side of the tubular member 155 may be detachably attached to the outer surface of the driving cylinder 121 or the outer surface of the compression cylinder 131 via a hose clamp. . And in the state which removed the tubular member 155, the structure which can change the direction of the nozzle 157 arbitrarily may be sufficient.

(Third embodiment)
Next, a third embodiment will be described in detail with reference to FIGS. The third embodiment is a modified example related to an air duster. In 3rd Embodiment, the structure regarding arrangement | positioning of each structural member which comprises the nailing machine 100 is changed.

As shown in FIG. 12, the main body 101 constituting the tool main body of the nailing machine 100 is formed by joining together a pair of substantially symmetrical housings. The main body portion 101 includes a handle portion 103 held by an operator, a driving mechanism housing portion 101A for housing a nail driving mechanism, a compression device housing portion 101B for housing a compression device, and a motor housing portion 101C for housing an electric motor. Yes. The handle portion 103, the driving mechanism housing portion 101A, the compression device housing portion 101B, and the motor housing portion 101C are arranged in a substantially square shape. That is, the handle portion 103 and the compression device housing portion 101B constitute two sides facing each other. Further, the driving mechanism housing portion 101A and the motor housing portion 101C are configured to have two sides facing each other. For convenience of explanation, the front end side (lower side in FIG. 12) of the nailing machine 100 is referred to as front or front, and the opposite side (upper side in FIG. 12) is referred to as rear or rear. Further, the connection side (left side in FIG. 12) between the handle portion 103 and the driving mechanism housing portion 101A is referred to as up or above, and the connection side (right side in FIG. 12) between the handle portion 103 and the motor housing portion 101C is referred to as down or down. That is, the handle portion 103 is disposed at the rear portion of the nailing machine 100, and the compression mechanism housing portion 101B is disposed at the front portion.

The magazine 105 is a rectangular long member that accommodates a nail as a material to be driven. The magazine 105 is arranged in parallel at the front end portion of the nailing machine 100 in front of the compression device housing portion 101B. The nails accommodated in the magazine 105 are supplied one by one from the direction intersecting the driving direction toward the driving path 141a of the driver guide 141. The nail driving mechanism, the compression device, the electric motor, the crank mechanism, the compressed air supply path, the main valve, and the like, which are internal mechanisms of the nailing machine 100, are configured in substantially the same manner as in the first embodiment. .

As shown in FIGS. 14 and 15, the air duster 250 mainly includes an air discharge port 251, an on-off valve 253, and a tubular member 255. The air discharge port 251 is formed in the cylinder head 131 b so as to communicate with the compression chamber 131 a of the compression cylinder 131. The on-off valve 253 is configured to open and close the air discharge port 251. The tubular member 255 is configured to guide the air in the compression chamber 131a of the compression cylinder 131 to the nozzle 257 when the air discharge port 251 is opened. The tubular member 255 is formed from a pipe or a hose. The nozzle 257 is provided as an opening of the tubular member 255 so as to release air forward. The on-off valve 253 corresponds to the “switching valve” in the present invention, the tubular member 255 corresponds to the “air passage” in the present invention, and the nozzle 257 corresponds to the “nozzle” in the present invention. is there.

The on-off valve 253 is formed as a substantially cylindrical tubular member. The on-off valve 253 is configured to be movable in the front-rear direction in a mounting hole 131c formed in the cylinder head 131b. The air outlet 251 is opened at the position where the on-off valve 253 has moved forward (see FIG. 14), and the air outlet 251 is closed at the position where it has moved rearward (see FIG. 15). Specifically, the cylindrical hole 253a of the on-off valve 253 is formed as a passage. Then, the opening / closing valve 253 is positioned forward, so that the cylindrical hole 253a communicates with the air discharge port 251. On the other hand, since the on-off valve 253 is positioned rearward, the communication between the cylindrical hole 253a and the air discharge port 251 is blocked. The front position of the on-off valve 253 corresponds to the “open position” in the present invention, and the rear position corresponds to the “closed position” in the present invention. Moreover, the cylinder hole 253a is the implementation structural example corresponding to the "air passage" in this invention. Further, two O-rings 259 are arranged on the outer periphery of the on-off valve 253 at a predetermined interval. The O-ring 259 is positioned before and after the air discharge port 251 when the on-off valve 253 is positioned at the closed position. This prevents the air in the compression chamber 131a from leaking outside through the gap between the outer peripheral surface of the on-off valve 153 and the mounting hole 131c.

The tubular member 255 is disposed outside the main body 101. One end (rear end) of the tubular member 255 is inserted and fixed to the front end (front end) of the cylindrical hole 235a of the on-off valve 235. The other end (front end) of the tubular member 255 is set as a nozzle 257 that discharges air. As shown in FIG. 14, a nozzle guide 261 is fixed to the outer surface of the magazine 105 with screws 263. The nozzle guide 261 has a guide hole 261a, and a tubular member 255 is slidably disposed in the guide hole 261a. That is, the nozzle guide 261 is provided as a guide member that guides the movement of the tubular member 255 when the tubular member 255 moves in the front-rear direction together with the on-off valve 235.

The on-off valve 253 moves in the front-rear direction together with a driver guide 141 as a contact arm. Thereby, it is comprised as a mechanical on-off valve which opens and closes the air discharge port 251. As shown in FIG. 16, the on-off valve 253 is connected to the driver guide 141 by a connecting mechanism 270 so as to move integrally with the driver guide 141. This connection mechanism 270 is an implementation structural example corresponding to the "connection member" in this invention.

As shown in FIG. 16, the connecting mechanism 270 is mainly configured by a connecting shaft 271 extending in the front-rear direction (a direction parallel to the nail driving direction) and two connecting plates 273 and 275. The two connecting plates 273 and 275 are formed in a predetermined shape by bending a long plate material. One end of each of the connecting plates 273 and 275 is fixed to the connecting shaft 271. The other end 273 a of the connecting plate 273 is fixed to the driver guide 141 on the side surface with screws 274. Further, the other end portion 275a of the connecting plate 275 is fixed by a spring pin 276 (see FIG. 14) to the protruding portion of the on-off valve 253 protruding outside the cylinder head 131b.

The driver guide 141 is urged toward the tip (front) side by a spring as an urging member, as in the first embodiment. That is, the driver guide 141 is positioned at the front position when not pressed against the workpiece. At this time, the on-off valve 253 is located at an open position where the air discharge port 251 is opened. The handle 103 of the main body 101 is provided with a changeover switch (not shown) that allows the operator to switch between the cleaning mode and the nail driving mode. When the changeover switch is switched to the nail driving mode, as in the case of the first embodiment, the electric motor is driven when both the trigger switch and the contact arm switch are turned on. On the other hand, the driving of the electric motor is stopped when one or both of the trigger switch and the contact arm switch are switched to the OFF state. When the mode is switched to the cleaning mode, the driving of the electric motor and the stop of the driving are controlled by switching the on / off state of the trigger switch by the trigger 103a. Further, when the changeover switch is switched to the cleaning mode, the controller controls the main valve so as not to be opened.

When the driver guide 141 is not pressed against the workpiece, that is, when the nail driving operation is not performed, the driver guide 141 is located at the front position. Therefore, the on-off valve 253 connected to the driver guide 141 via the connecting mechanism 170 is located at the front open position and opens the air discharge port 251 as shown in FIG.

When the air duster 250 is used to release air from the nozzle 257, the changeover switch is switched to the cleaning mode. Then, by pulling the trigger 103a and driving the electric motor and the compression device, the air in the compression chamber 131a passes from the air discharge port 251 through the cylindrical hole 253a and the tubular member 255 of the on-off valve 253, and forward from the nozzle 257. Is released. Thereby, for example, the work area can be cleaned by blowing off dust or the like existing on the surface of the workpiece to be nailed.

In addition, the direction of the nozzle 157 is set so that the discharge direction of the air discharged from the nozzle 157 is directed toward the tip of the driver guide 141. For this reason, the operator can release air with the tip of the driver guide 141 as a mark. In addition, when the changeover switch is switched to the cleaning mode, the main valve 137 does not operate, so that an unexpected nailing operation is not performed.

On the other hand, when performing the nail driving work, switch the changeover switch to the nail driving mode. When the driver guide 141 as a contact arm is pressed against the workpiece, the driver guide 141 is moved rearward and the contact arm switch is turned on. At this time, the on-off valve 253 connected to the driver guide 141 by the connecting mechanism 270 moves to the rear closing position and closes the air outlet 251 as shown in FIG. When the trigger switch is turned on by pulling the trigger 103a while the air discharge port 251 is closed, current is supplied to the electric motor to drive it. Thereby, the electric motor drives the compressor. As a result, the nailing operation is performed.

According to the above third embodiment, the on-off valve 253 for opening and closing the air discharge port 251 and the driver guide 141 are connected by the connecting mechanism 270, so that the on-off valve 253 is mechanically opened and closed. Therefore, the on-off valve 253 is reliably opened and closed.

In the third embodiment, the pressing of the driver guide 141 against the workpiece is released, and the opening / closing valve 253 opens the air discharge port 251 when the driver guide 141 is positioned forward. For this reason, for example, when the operator releases the pressing operation of the driver guide 141 against the workpiece during the nailing operation, the on-off valve 253 is moved to the open position as the driver guide 141 moves forward. . Therefore, the air discharge port 251 is opened. Since the compression chamber 131a communicates with the atmosphere through the nozzle 257, energy transmission from the compression device to the nail driving mechanism is interrupted. That is, according to the third embodiment, the on-off valve 253 also functions as an air release valve. As a result, an unexpected driving operation of the nail is prevented. Further, during the next driving operation, it is possible to suppress an excessive load from acting on the electric motor or the compression device due to the compressed air remaining in the compression chamber 131a. Therefore, the electric motor or the compression device is protected from overload.

In the third embodiment, the compression cylinder 131 is disposed adjacent to the magazine 105 on the front side of the nailing machine 100, and the cylinder head 131b side is disposed on the driver guide 141 side. As a result, the on-off valve 253 is arranged close to the driver guide 141. Thereby, the connection between the on-off valve 253 and the driver guide 141 by the connection mechanism 270 is simplified.

In the third embodiment, the compression cylinder 131 is arranged so as to intersect the driving cylinder. However, the compression cylinder 131 is arranged in parallel to the driving cylinder 121 as in the first embodiment. May be.

In each of the above embodiments, the nailing machine 100 including the air dusters 150 and 250 includes an illumination device that irradiates the tip region of the driver guide 141 as a region from which the air discharged from the nozzles 157 and 257 is released. It may be.

In view of the gist of the present invention, the driving tool according to the present invention can be configured in the following manner.
(Aspect 1)
The driving tool according to claim 8, wherein
Having a biasing member,
The driver guide is constantly urged in the driving direction by the urging member, and is moved in a direction opposite to the driving direction against the urging force of the urging member when pressed against the workpiece. A driving tool characterized in that it is configured as a contact arm.
(Aspect 2)
A driving tool according to aspect 1,
A connecting member for connecting the driver guide and the switching valve;
The switching valve is switched to an open position that opens the air passage when the driver guide moves in the driving direction, and the air passage is moved when the driver guide moves in a direction opposite to the driving direction. A driving tool configured to be switched to a closing position for closing.

(Correspondence between each component of this embodiment and each component of the present invention)
The correspondence between each component of the present embodiment and each component of the present invention is shown as follows. In addition, this embodiment shows an example of the form for implementing this invention, and this invention is not limited to the structure of this embodiment.
The nailing machine 100 is an example of a configuration corresponding to the “driving tool” of the present invention.
The trigger 103a is an example of a configuration corresponding to the “control member” of the present invention.
The battery pack 110 is an example of a configuration corresponding to the “battery” of the present invention.
The electric motor 111 is an example of a configuration corresponding to the “motor” of the present invention.
The driving cylinder 121 is an example of a configuration corresponding to the “driving cylinder” of the present invention.
The driving piston 123 is an example of a configuration corresponding to the “driving piston” of the present invention.
The piston main body portion 124 is an example of a configuration corresponding to the “sliding portion” of the present invention.
The driver 125 is an example of a configuration corresponding to the “driving unit” of the present invention.
The compression device 130 is an example of a configuration corresponding to the “compressed air generation device” of the present invention.
The compression cylinder 131 is an example of a configuration corresponding to the “compression cylinder” of the present invention.
The compression piston 133 is an example of a configuration corresponding to the “compression piston” of the present invention.
The compression cylinder 131 is an example of a configuration corresponding to the “compression cylinder” of the present invention.
The driver guide 141 is an example of a configuration corresponding to the “control member” of the present invention.
The driver guide 141 is an example of a configuration corresponding to the “contact arm” of the present invention.
The driver guide 141 is an example of a configuration corresponding to the “guide member” of the present invention.
The on-off valve 153 is an example of a configuration corresponding to the “switching valve” of the present invention.
The on-off valve 153 is an example of a configuration corresponding to the “atmospheric release valve” of the present invention.
The on-off valve 153 is an example of a configuration corresponding to the “electromagnetic valve” of the present invention.
The tubular member 155 is an example of a configuration corresponding to the “air passage” of the present invention.
The nozzle 157 is an example of a configuration corresponding to the “nozzle” of the present invention.
The compression piston 161 is an example of a configuration corresponding to the “compressed air generation device” of the present invention.
The cylindrical moving body 167 is an example of a configuration corresponding to the “intermediate body” of the present invention.
The locking member 173 is an example of a configuration corresponding to the “connection mechanism” of the present invention.

The switching member 179 is an example of a configuration corresponding to the “switching mechanism” of the present invention.
The on-off valve 253 is an example of a configuration corresponding to the “switching valve” of the present invention.
The on-off valve 253 is an example of a configuration corresponding to the “atmospheric release valve” of the present invention.
The cylindrical hole 253a is an example of a configuration corresponding to the “air passage” of the present invention.
The nozzle 257 is an example of a configuration corresponding to the “nozzle” of the present invention.
The connection mechanism 270 is an example of a configuration corresponding to the “connection member” of the present invention.

DESCRIPTION OF SYMBOLS 100 Nailing machine 101 Main part 101A Driving mechanism accommodating part 101B Compression apparatus accommodating part 101C Motor accommodating part 103 Handle part 103a Trigger 103b Trigger switch 103c Support shaft 105 Magazine 107 Main body housing 107a Wall surface 109 Motor housing 110 Battery pack 111 Electric motor 113 Gear Deceleration mechanism 115 Crank mechanism 115a Crank shaft 115b Eccentric pin 115c Connecting rod 120 Nail driving mechanism 121 Driving cylinder 121a Spring receiving portion 122 Cylinder chamber 123 Driving piston 124 Piston body portion 125 Driver 130 Compressor 131 Compression cylinder 131a Compression chamber 131b Cylinder head 131c Mounting hole 133 Compression piston 133a Piston body 135 Communication path 137 Main valve 141 Driver guide 141a Implanting passage 150 Air duster 151 Air discharge port 153 Open / close valve 155 Tubular member 156 Open / close valve switch 157 Nozzle 158 Release mode changeover switch 161 Compression piston 162 Piston body 163 Tubular portion 163a Spring receiving portion 163b Interference avoiding groove 165 First compression Coil spring 167 Cylindrical moving body 168 Piston receiving portion 168a Opening 169 Second compression coil spring 171 Stopper member 172 Buffer member 173 Locking member 173a Claw portion 174 Pin 175 Locking spring 179 Switching member 181 Crank mechanism 183 Gear speed reduction mechanism 185 Bearing 187 Crank Plates 189a and 189b Eccentric pins 191a and 191b Engagement receiving portion 250 Cleaning device 251 Air discharge port 253 On-off valve 253a Tubular hole 255 Tubular member 257 Nozzle 259 O-ring 261 Nozzle guide 26 a guide hole 263 screw 270 coupling mechanism 271 connecting shaft 273 while the coupling plate 273a extending end portion 274 screws 275 other connecting plate 275a extending end portion 276 spring pin

Claims (11)

1. A driving tool for driving a workpiece to be driven,
   A driving cylinder;
   A sliding portion slidably fitted to the driving cylinder and a driving piston connected to the sliding portion and provided with a long driving portion for driving the driven material;
   Battery,
   A motor driven by electric power supplied from the battery;
   A compressed air generating device driven by the motor to generate compressed air;
   A nozzle,
   An air passage that guides the compressed air generated by the compressed air generation device to the nozzle;
   A switching valve provided in the air passage and capable of switching between an open position for opening the air passage and a closed position for closing;
   The driven piston is moved linearly by the compressed air generated by the compressed air generating device, and the driven material is driven by the driven portion of the driven piston,
   The compressed air generated by the compressed air generating device is used for a driving operation in which the driving piston drives the driven material when the switching valve is switched to the closed position, and the switching valve is set to the open position. A driving tool configured to be discharged from the nozzle when switched.
2. The driving tool according to claim 1,
   The driving tool according to claim 1, wherein the switching valve is configured to function also as an air release valve that discharges compressed air generated by the compressed air generation device to the atmosphere.
3. The driving tool according to claim 2,
   A control member for controlling driving and stopping of the motor;
   The atmosphere release valve is configured to be switched to an open position in accordance with a predetermined operation state of an internal mechanism defined by the battery, the motor, the compressed air generation device, the driving piston, and the control member. A driving tool characterized by
4. The driving tool according to any one of claims 1 to 3,
   The driving piston generates a compressed air in the driving cylinder by sliding in the driving cylinder in a direction opposite to a driving direction in which the driven material moves when the driving material is driven by the driving part. A driving tool characterized by being made.
5. The driving tool according to any one of claims 1 to 4,
   An intermediate body driven by the motor and linearly moved in a direction opposite to the driving direction of the driven material;
   A coupling mechanism for coupling the driving piston to the intermediate body and releasing the coupling;
   A compression piston that is slidably accommodated in the driving cylinder and generates compressed air in the driving cylinder by moving in the direction opposite to the driving direction together with the intermediate body;
   A switching mechanism capable of switching between one of a connection state in which the connection mechanism connects the intermediate body and the driving piston and a connection release state in which the connection is released;
   Further comprising
   When the intermediate body is moved in the direction opposite to the driving direction, the driving piston and the compression piston move together with the intermediate body when the connecting mechanism is switched to the connected state. When the driving piston generates compressed air for driving a material to be driven into the driving cylinder, and the connection mechanism is switched to the disconnected state, only the compression piston moves together with the intermediate body. Thus, the driving tool is configured to generate compressed air to be discharged from the nozzle into the driving cylinder.
6. The driving tool according to any one of claims 1 to 3,
   The compressed air generating device includes a compression cylinder different from the driving cylinder, and a compression piston that is driven by the motor and is slidable in the compression cylinder, and the compression piston slides in the compression cylinder. A driving tool configured to generate compressed air in the compression cylinder by moving.
7. The driving tool according to claim 6,
   The driving cylinder and the compression cylinder are arranged so that the major axis directions thereof are parallel to each other,
   The driving tool according to claim 1, wherein the air passage is disposed so as to extend between the driving cylinder and the compression cylinder.
8. The driving tool according to any one of claims 1 to 7,
   A guide member for guiding a material to be driven to be driven by the driving portion;
   The nozzle is arranged in the vicinity of the guide member.
9. The driving tool according to any one of claims 1 to 8,
   The compressed air discharged from the nozzle is switched and discharged between a continuous discharge mode continuously discharged at a predetermined pressure and an intermittent discharge mode intermittently discharged at a pressure higher than the predetermined pressure. It is comprised so that it may be configured.
10. The driving tool according to any one of claims 1 to 9,
    The switching tool is constituted by a solenoid valve.
11. The driving tool according to any one of claims 1 to 9,
    A biasing member;
    A contact arm that is constantly biased in the driving direction by the biasing member and is moved in a direction opposite to the driving direction against the biasing force of the biasing member when pressed against the workpiece;
    A connecting member that connects the contact arm and the switching valve;
    The switching valve is switched to an open position that opens the air passage when the contact arm moves in the driving direction, and the air passage is moved when the contact arm moves in a direction opposite to the driving direction. A driving tool configured to be switched to a closing position for closing.

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