JP6870496B2 - Pneumatic tool with air duster - Google Patents

Description

The present invention relates to a pneumatic tool including an air duster that ejects air from an outlet using compressed air supplied from the outside.

Conventionally, the surface of the base material is cleaned with an air duster during nailing work. At this time, if a nailing machine with an air duster is used, it is not necessary to switch between the nailing machine and the air duster, so that workability is good.

Regarding this type of pneumatic tool with an air duster, Patent Document 1 discloses a configuration in which the operation buttons of the air duster are arranged within the reach of the thumb or index finger of the operator holding the tool body. According to such a configuration, it is not necessary to re-grip the grip when using the air duster, so that the operability can be further improved.

Japanese Patent No. 5119688

However, in a structure in which the air duster can be used while holding the grip, the air duster can be used with the finger on the trigger for performing the nailing operation, so that the trigger may be erroneously operated when the air duster is used. If the trigger is operated while using the air duster, the air pressure may be insufficient and the machine may not operate normally.

Therefore, an object of the present invention is to provide a pneumatic tool with an air duster that prevents a driving operation due to an erroneous operation when the air duster is used.

The present invention is a pneumatic tool having a striking mechanism and an air duster structure that operate using compressed air, and a trigger that accepts an operation for operating the striking mechanism and an operation for operating the air duster structure. an operation unit for accepting said a valve mechanism for controlling the supply of compressed air to the impact mechanism, comprising a comprising a limiting mechanism in which the air duster structure the striking mechanism is limited so as not be activated during operation, the valve mechanism When the trigger is operated, it is operated by the load difference of the compressed air stored in the upper and lower accumulator chambers, and in the state where the operation unit is operated, even if the trigger is operated, the said The valve mechanism is configured so that the pressure fluctuation for operating the valve mechanism does not occur and the valve mechanism does not operate .

As described above, the present invention includes a limiting mechanism that limits the striking mechanism so that it cannot be operated while the air duster structure is operating. Therefore, it is possible to prevent the driving operation due to an erroneous operation when the air duster is used.

It is a side view of the pneumatic tool which concerns on 1st Embodiment. It is a front view of the pneumatic tool which concerns on 1st Embodiment. It is BB sectional view of the pneumatic tool which concerns on 1st Embodiment. FIG. 5 is a cross-sectional view taken along the line AA of the pneumatic tool according to the first embodiment. It is the D part enlarged sectional view of the pneumatic tool which concerns on 1st Embodiment. It is the C part enlarged sectional view of the pneumatic tool which concerns on 1st Embodiment. FIG. 5 is an enlarged cross-sectional view of a portion C of the pneumatic tool according to the first embodiment, and is a view in a state where a trigger is operated and a pilot valve is operated. FIG. 5 is an enlarged cross-sectional view of a D portion of the pneumatic tool according to the first embodiment, and is a view showing a state in which the operation portion is operated. It is the C part enlarged sectional view of the pneumatic tool which concerns on 1st Embodiment, and is the figure in the state which the pilot valve is not operating although the trigger is operated. It is a side view of the pneumatic tool which concerns on 2nd Embodiment. It is a perspective view of the pneumatic tool which concerns on 2nd Embodiment. It is the D part enlarged sectional view of the pneumatic tool which concerns on 2nd Embodiment. It is a perspective view of the pneumatic tool which concerns on 2nd Embodiment, and is the figure in the state which the lock of the operation part was released. FIG. 5 is an enlarged cross-sectional view of the D portion of the pneumatic tool according to the second embodiment, and is a view in a state where the operation portion is unlocked. FIG. 5 is an enlarged cross-sectional view of a D portion of the pneumatic tool according to the second embodiment, and is a view showing a state in which the operation portion is operated. It is a perspective view of the pneumatic tool which concerns on 3rd Embodiment. It is the D part enlarged sectional view of the pneumatic tool which concerns on 3rd Embodiment. It is the D part enlarged sectional view of the pneumatic tool which concerns on 3rd Embodiment, and is the figure of the state in which the operation part was operated.

(First Embodiment)
The first embodiment of the present invention will be described with reference to FIGS. 1 to 9.

The pneumatic tool 10 according to the present embodiment uses compressed air supplied from the outside to launch a fastener, and uses the compressed air supplied from the outside to eject from a ejection port 17 (see FIG. 2). It has an air duster structure that blows out air. By providing the pneumatic tool 10 with an air duster structure in this way, it is possible to perform driving with a fastener and cleaning with an air duster without having to change the tool.

As shown in FIG. 1, the pneumatic tool 10 is operably provided on an output unit 11 having a striking mechanism inside, a grip 12 provided so as to project in a direction orthogonal to the output unit 11, and a grip 12. The trigger 13 is provided, the nose portion 14 is provided so as to project to the tip of the output portion 11, the magazine 15 is connected to the rear of the nose portion 14, and the air duster structure can be operated by pressing. An operation unit 18 and a lock member 50 that locks the trigger 13 so that it cannot be operated are provided.

The striking mechanism built into the output unit 11 operates the driver by using the force of compressed air, and the driver drives the fastener. The driver is movable in the direction of the nose portion 14 in order to launch the fastener. The driver who has moved in the driving direction launches the fastener set in the nose portion 14. The fastener punched out by the driver is ejected from the injection port 14a opened at the tip of the nose portion 14.

When the operator uses the pneumatic tool 10, the grip 12 is grasped and gripped, and the trigger 13 is pulled. By this operation, the striking mechanism described above is activated to launch the fastener.

A connecting fastener is housed in the magazine 15, and the leading fastener of the connecting fastener is sequentially supplied in the direction of the nose portion 14 (directly below the driver before the driving operation).

An end cap portion 16 for connecting an air hose for supplying air is provided at the rear end of the grip 12. Although not particularly shown, the air hose is connected to an air supply source such as an air compressor, and the compressed air supplied from the air supply source can be supplied to the pneumatic tool 10. The compressed air supplied from the end cap portion 16 via the air hose is stored in the air chamber 33 formed inside the grip 12 and the output portion 11. The compressed air stored in the air chamber 33 can be supplied to the striking mechanism and the air duster structure.

As shown in FIG. 3, the striking mechanism according to the present embodiment includes a piston 30, a cylinder 31, and a head valve 32.

The piston 30 is slidably arranged in the cylinder 31, and a driver is fixed to the tip of the piston 30. By sliding the piston 30 in the direction of the injection port 14a, the fastener can be launched by the driver.

Further, the head valve 32 is a tubular valve body for controlling the inflow of compressed air into the cylinder 31. The head valve 32 is arranged on the outer circumference of the cylinder 31 and is slidable in the axial direction.

In this striking mechanism, when the head valve 32 slides in the opening direction, the compressed air in the air chamber 33 is supplied to the upper surface of the piston 30 in the cylinder 31. As a result, the piston 30 is driven downward, and the fastener is hit by the driver fixed to the tip of the piston 30.

The pneumatic tool 10 according to the present embodiment includes a pilot valve 35 in order to control the supply of compressed air to the striking mechanism as described above.

The pilot valve 35 is a valve mechanism that operates by the load difference of the compressed air stored in the upper and lower accumulator chambers (upper accumulator chamber 37a and lower accumulator chamber 37b) when the trigger 13 is operated. As shown in FIG. 6, the pilot valve 35 according to the present embodiment includes a valve housing 37, a valve body 36, a stem 38, and a stem urging member 39.

The valve housing 37 is fixed to the housing of the pneumatic tool 10, and houses the valve body 36 so as to be slidable. The space inside the valve housing 37 is vertically partitioned by a seal member 36a of the valve body 36. Specifically, it is partitioned into an upper accumulator chamber 37a on the anti-trigger 13 side and a lower accumulator chamber 37b on the trigger 13 side. Further, in the valve housing 37, a supply port 37c is opened on the side surface of the upper accumulator chamber 37a, and an exhaust port 37d is opened so as to face the trigger 13.

The supply port 37c is an opening for communicating the upper accumulator chamber 37a and the air chamber 33. By providing the supply port 37c, the compressed air in the air chamber 33 is configured to flow into the upper accumulator chamber 37a. As shown in FIG. 6, when the trigger 13 is not operated, there is a gap between the hollow portion of the valve body 36 and the stem 38, and the upper accumulator chamber 37a and the lower accumulator chamber 37b communicate with each other through this gap. Therefore, the compressed air that has flowed into the upper accumulator chamber 37a also flows into the lower accumulator chamber 37b. In other words, the air pressure in the upper accumulator chamber 37a and the air pressure in the lower accumulator chamber 37b are configured to be equal to each other.

The exhaust port 37d is an opening for communicating the lower accumulator chamber 37b and the atmosphere (outside). However, as shown in FIG. 6, when the trigger 13 is not operated, the exhaust port 37d is sealed by the stem 38, and the lower accumulator chamber 37b is not opened to the atmosphere. On the other hand, as shown in FIG. 7, when the stem 38 moves upward and the exhaust port 37d opens, the lower accumulator chamber 37b is opened to the atmosphere. At this time, the gap between the hollow portion of the valve body 36 and the stem 38 is closed by the stem 38, so that the upper accumulator chamber 37a and the lower accumulator chamber 37b are cut off from each other. Therefore, the pressure in the upper accumulator chamber 37a does not decrease, but only the pressure in the lower accumulator chamber 37b decreases (atmospheric pressure). That is, when the exhaust port 37d is opened, the air pressure in the upper accumulator chamber 37a is higher than that in the lower accumulator chamber 37b.

The valve body 36 is a tubular member slidably arranged inside the valve housing 37. As described above, the valve body 36 is provided with a seal member 36a (O-ring or the like) that separates the upper accumulator chamber 37a and the lower accumulator chamber 37b. The seal member 36a seals between the upper accumulator chamber 37a and the lower accumulator chamber 37b so that air does not leak.

The seal member 36a is attached to a flange portion 36b protruding in the circumferential direction from the valve body 36. The upper surface of the flange portion 36b faces the upper accumulator chamber 37a, and the lower surface faces the lower accumulator chamber 37b. The surface area of the flange portion 36b is such that the pressure received from the lower accumulator chamber 37b is larger than the pressure received from the upper accumulator chamber 37a when the air pressure in the upper accumulator chamber 37a and the inside of the lower accumulator chamber 37b are the same. Is set to.

The stem 38 is a rod-shaped member slidably arranged inside the valve body 36. The tip of the stem 38 protrudes from the exhaust port 37d of the valve housing 37, and the protruding tip faces the trigger 13. The stem 38 is always urged by the stem urging member 39 so as to project in the direction of the trigger 13.

The pilot valve 35 operates as follows. That is, as shown in FIG. 6, when the trigger 13 is not operated, the air pressure in the upper accumulator chamber 37a and the air pressure in the lower accumulator chamber 37b are equal. At this time, since the valve body 36 is configured so that the pressure receiving area is different between the upper accumulator chamber 37a side and the lower accumulator chamber 37b side, the load received from the lower accumulator chamber 37b is larger than the load received from the upper accumulator chamber 37a. The larger one is larger, and is moved upward by the load received from the lower accumulator chamber 37b. When the valve body 36 is moved upward, the exhaust path 40 is closed. The exhaust path 40 is for releasing the compressed air that pushes up the head valve 32 in the closing direction to the atmosphere. Therefore, when the exhaust path 40 is closed, the head valve 32 is still pushed up in the closing direction, and is in a state of waiting for the injection of the fastener.

When the trigger 13 is operated from this standby state, the stem 38 is pushed inward against the urging force of the stem urging member 39, as shown in FIG. By sliding the stem 38, the upper accumulator chamber 37a and the lower accumulator chamber 37b are shut off, the exhaust port 37d is opened, and the lower accumulator chamber 37b is opened to the atmosphere. Then, since the load difference of the compressed air between the upper accumulator chamber 37a and the lower accumulator chamber 37b occurs, the load of the upper accumulator chamber 37a prevails and the valve body 36 slides downward. When the valve body 36 slides downward, the exhaust path 40 opens. When the exhaust path 40 is opened, the compressed air pushing up the head valve 32 in the closing direction escapes to the atmosphere, so that the head valve 32 slides in the opening direction. When the head valve 32 slides in the opening direction, as described above, the compressed air in the air chamber 33 is supplied to the upper surface of the piston 30 in the cylinder 31, and the piston 30 operates to eject the fastener.

Further, in the air duster structure according to the present embodiment, when the operation unit 18 is operated, compressed air is ejected from the ejection port 17 that opens near the nose portion 14. As shown in FIG. 1, the operation unit 18 according to the present embodiment is arranged at a position where the operator can operate the grip 12 by the hand holding the grip 12. Specifically, when the grip 12 is gripped by the right hand, it is arranged at a position where it can be operated by the thumb of the right hand.

As shown in FIGS. 4 and 5, the operation unit 18 is for operating the valve body 19. The valve body 19 slides in conjunction with the pressing operation of the operation unit 18, blocks or opens the supply path of the compressed air to the ejection port 17, and reduces the supply amount of the compressed air to the ejection port 17. It is configured to be adjustable. The valve body 19 is urged in the protruding direction by a valve body urging member 20 formed of a spring. The valve body 19 is configured to block the supply path of compressed air in a natural state by being urged by the valve body urging member 20. Then, when the operation unit 18 is pushed against the urging force of the valve body urging member 20, the valve body 19 moves in the direction of opening the pipeline.

Specifically, an internal pipeline 19b is formed inside the valve body 19, so that compressed air can be introduced from the intake port 19a into the internal pipeline 19b. In the natural state, as shown in FIG. 5, the valve body 19 is urged in the protruding direction, and the intake port 19a is sealed with respect to the air chamber 33. When the operation unit 18 is pushed in from this state, as shown in FIG. 8, the intake port 19a communicates with the air chamber 33, and the compressed air in the air chamber 33 is introduced from the intake port 19a into the internal pipeline 19b. The compressed air introduced from the intake port 19a passes through the internal pipeline 19b and flows in the direction of the joint component 21. Since the duster pipe 22 is connected to the joint component 21, the compressed air flowing in the direction of the joint component 21 is supplied to the duster pipe 22. Since the duster pipe 22 is connected so as to continue to the ejection port 17, the compressed air is ejected from the ejection port 17. In this way, the valve body 19 is opened by pushing the operation unit 18 and the air duster structure is operated.

By the way, the pneumatic tool 10 according to the present embodiment is provided with a limiting mechanism that limits the striking mechanism so that it cannot be operated while the air duster structure is operating. In this limiting mechanism, when the operation unit 18 is operated, even if the trigger 13 is operated, the load difference of the compressed air stored in the upper accumulator chamber 37a and the lower accumulator chamber 37b does not occur, and the pilot valve 35 operates. It is configured not to work.

That is, as shown in FIG. 5, a pilot valve communication portion 23, which is a space surrounded by a housing, is formed on the outer peripheral portion of the valve body 19. The pilot valve communication portion 23 communicates with the upper accumulator chamber 37a of the pilot valve 35 via the communication passage 24 (see FIG. 6) in order to supply compressed air to the upper accumulator chamber 37a and the lower accumulator chamber 37b. It is provided.

The pilot valve communication unit 23 communicates with the air chamber 33 and is cut off from the duster pipe 22 in the natural state shown in FIG. 5 (a state in which the trigger 13 and the operation unit 18 are not operated). .. Therefore, the pilot valve communication portion 23 in the natural state shown in FIG. 5 is filled with high-pressure air, and the upper accumulator chamber 37a and the lower accumulator chamber 37b are also filled with high-pressure air. When the trigger 13 is operated in this state, as described above, the load difference of the compressed air stored in the upper accumulator chamber 37a and the lower accumulator chamber 37b occurs, the pilot valve 35 operates, and the striking mechanism operates. ..

On the other hand, as shown in FIG. 8, when the air duster structure is in operation, the pilot valve communication portion 23 is shut off from the air chamber 33 and is open to the atmosphere. Therefore, in the state shown in FIG. 8, the upper accumulator chamber 37a and the lower accumulator chamber 37b are also open to the atmosphere via the pilot valve communication portion 23. In this state, even if the user mistakenly operates the trigger 13, the load difference of the compressed air stored in the upper accumulator chamber 37a and the lower accumulator chamber 37b does not occur. Therefore, as shown in FIG. 9, the valve The main body 36 does not move (that is, the pilot valve 35 does not operate), and the striking mechanism does not operate.

As described above, according to the present embodiment, the air duster structure is in operation, including a trigger 13 for receiving an operation for operating the striking mechanism and an operation unit 18 for receiving an operation for operating the air duster structure. It is equipped with a limiting mechanism that limits the striking mechanism so that it cannot operate. Therefore, when the air duster is used, it is possible to prevent the driving operation due to an erroneous operation.

In the above-described embodiment, it has been described that the operation of the trigger 13 is invalidated when the air duster is used, but in addition to this, a means for locking the operation of the trigger 13 may be provided. In the present embodiment, the operation of the trigger 13 can be locked by the lock member 50. As shown in FIGS. 5 and 6, the lock member 50 is rotatably attached to the housing of the tool, and has an operably exposed head 51 on the same side surface as the operation unit 18, and the inside of the housing. A shaft portion 52 that penetrates the shaft portion 52 is provided.

The shaft portion 52 is arranged inside the housing so as to face the engaging portion 13a provided on the peripheral edge of the trigger 13. Further, a groove portion 52a is provided on a part of the peripheral surface of the shaft portion 52. As shown in FIG. 5, the groove portion 52a faces the engaging portion 13a in the unlocked state, and when the trigger 13 is operated in this state, the groove portion 52a is engaged as shown in FIG. It is configured so that the shaft portion 52 and the engaging portion 13a do not interfere with each other when the portion 13a passes through.

On the other hand, when the operator picks up the head 51 and rotates the lock member 50 to put it in the locked state, the peripheral surface of the shaft portion 52 in which the groove portion 52a is not provided faces the engaging portion 13a. Become. Even if the trigger 13 is to be operated in this state, the shaft portion 52 and the engaging portion 13a interfere with each other, so that the trigger 13 cannot be operated.

In this way, a limiting mechanism that limits the striking mechanism so that it cannot be operated while the air duster structure is operating may be provided in combination with the lock member 50 as a safety device.

Further, in the above-described embodiment, the operation of the pilot valve 35 is controlled so that the striking mechanism is not operated. That is, in the state where the operation unit 18 is operated, even if the trigger 13 is operated, the pressure fluctuation for operating the pilot valve 35 (valve mechanism) does not occur, and the pilot valve 35 is configured not to operate. However, instead of this, the striking mechanism may not be operated by controlling the operation of the head valve 32. That is, in the state where the operation unit 18 is operated, even if the trigger 13 is operated, the pressure fluctuation for operating the head valve 32 (valve mechanism) does not occur, and even if the head valve 32 is configured not to operate. Good.

(Second Embodiment)
A second embodiment of the present invention will be described with reference to FIGS. 10 to 15. The feature of this embodiment is that it has a limiting mechanism different from that of the first embodiment. Specifically, in the first embodiment, the limiting mechanism is realized by configuring the pilot valve 35 so as not to operate even if the trigger 13 is operated, but instead of this, the second In the embodiment, the locking member 50 locks the trigger 13 to realize the limiting mechanism. Since the basic configuration of the present embodiment is not different from that of the first embodiment, only the differences will be described while avoiding duplicate descriptions.

The lock member 50 according to the present embodiment is for exclusively locking the operation unit 18 and the trigger 13 so that they cannot be operated at the same time. In other words, it is configured so that the operation unit 18 can be operated and the trigger 13 can be operated. As shown in FIG. 12 and the like, the lock member 50 includes a head portion 51 and a shaft portion 52.

The head portion 51 of the lock member 50 is operably exposed on the same side surface as the operation unit 18. The operator can rotate the lock member 50 by pinching and operating the head 51. As shown in FIGS. 10 and 11, the head portion 51 includes a projecting portion 51a formed so as to project from a part of the outer peripheral surface. The protruding portion 51a is formed so as to protrude in a direction orthogonal to the rotation axis (shaft portion 52) of the lock member 50. Therefore, when the lock member 50 rotates, the protruding direction of the protruding portion 51a changes.

As shown in FIGS. 10 to 12, the protruding portion 51a is arranged so as to be able to enter the gap between the operating portion 18 and the housing. If the protrusion 51a is inserted into the gap between the operation unit 18 and the housing, the operation unit 18 cannot be pushed in and operated, so that the operation of the operation unit 18 can be locked.

On the other hand, as shown in FIGS. 13 and 14, if the lock member 50 is rotated so that the protruding portion 51a does not enter the gap between the operation portion 18 and the housing, the lock of the operation portion 18 is released. Can be done. That is, as shown in FIG. 15, since the protruding portion 51a does not hinder the movement of the operating portion 18, the operating portion 18 can be pushed in and operated.

The shaft portion 52 of the lock member 50 penetrates the inside of the housing and is rotatably supported by the housing. The shaft portion 52 is arranged inside the housing so as to face the engaging portion 13a provided on the peripheral edge of the trigger 13 (similar to the first embodiment, see FIG. 6 and the like).

Further, a groove portion 52a is provided on the peripheral surface of the shaft portion 52. As shown in FIG. 12, the groove portion 52a faces the engaging portion 13a in a state where the operation of the operation portion 18 is locked. When the trigger 13 is operated in this state, the engaging portion 13a passes through the groove portion 52a so that the shaft portion 52 and the engaging portion 13a do not interfere with each other (similar to the first embodiment, see FIG. 7 and the like). Therefore, the lock of the trigger 13 is released.

On the other hand, as shown in FIG. 14, when the operator picks the head 51 and rotates the lock member 50 to unlock the operation portion 18, the peripheral surface of the shaft portion 52 in which the groove portion 52a is not provided is provided. Is in a state facing the engaging portion 13a. Even if the trigger 13 is to be operated in this state, the shaft portion 52 and the engaging portion 13a interfere with each other, so that the trigger 13 cannot be operated. That is, the operation of the trigger 13 is locked.

As described above, the lock member 50 is configured to lock the trigger 13 when the operation unit 18 is unlocked, and conversely, to lock the operation unit 18 when the trigger 13 is unlocked. Therefore, since the trigger 13 and the operation unit 18 are not operated at the same time, it is possible to prevent the driving operation due to an erroneous operation when the air duster is used.

(Third Embodiment)
A third embodiment of the present invention will be described with reference to FIGS. 16-18. The feature of this embodiment is that it has a limiting mechanism different from that of the first embodiment. Specifically, in the first embodiment, the limiting mechanism is realized by configuring the pilot valve 35 so as not to operate even if the trigger 13 is operated, but instead of this, a third In the embodiment, the lock member 50 is interlocked when the operation unit 18 is operated, and the lock member 50 locks the trigger 13 to realize the limiting mechanism. Since the basic configuration of the present embodiment is not different from that of the first embodiment, only the differences will be described while avoiding duplicate descriptions.

As shown in FIG. 16, the operation unit 18 according to the present embodiment includes a protruding edge 18a extending so as to cover the lock member 50. When the operation unit 18 is pressed, the protruding edge 18a is configured to push the head portion 51 (described later) of the lock member 50.

The lock member 50 according to the present embodiment is for locking the trigger 13 so that it cannot be operated during the operation of the operation unit 18, and as shown in FIG. 17 and the like, the head portion 51, the shaft portion 52, and the lock member 50 To be equipped with. The lock member 50 is slidably attached to the housing in the axial direction and is urged in the protruding direction by a spring or the like (not shown).

The head portion 51 of the lock member 50 is exposed on the same side surface as the operation unit 18. The head 51 protrudes so as to be pushable in a natural state, and its surface is covered with a protruding edge 18a extending from the operating portion 18 as described above.

Further, the shaft portion 52 of the lock member 50 penetrates the inside of the housing and is slidably supported with respect to the housing. The shaft portion 52 is arranged inside the housing so as to face the engaging portion 13a provided on the peripheral edge of the trigger 13 (similar to the first embodiment, see FIG. 6 and the like).

Further, a groove portion 52a is provided on the peripheral surface of the shaft portion 52. As shown in FIG. 17, the groove portion 52a faces the engaging portion 13a in a state where the operating portion 18 is not operated. When the trigger 13 is operated in this state, the engaging portion 13a passes through the groove portion 52a so that the shaft portion 52 and the engaging portion 13a do not interfere with each other (similar to the first embodiment, see FIG. 7 and the like). Therefore, the lock of the trigger 13 is released when the operation unit 18 is not operated.

On the other hand, as shown in FIG. 18, when the operation unit 18 is operated, the lock member 50 is pushed and slides together with the operation unit 18, so that the shaft portion 52 in which the groove portion 52a is not provided is provided. The peripheral surface is in a state of facing the engaging portion 13a. Even if the trigger 13 is to be operated in this state, the shaft portion 52 and the engaging portion 13a interfere with each other, so that the trigger 13 cannot be operated. That is, in the state where the operation unit 18 is operated, the operation of the trigger 13 is locked.

As described above, the lock member 50 is configured to lock the trigger 13 when the operation unit 18 is operated. Therefore, when the air duster is used, it is possible to prevent the driving operation due to an erroneous operation.

When the trigger 13 is operated, the engaging portion 13a engages with the groove portion 52a to prevent the locking member 50 from sliding. Therefore, the operation unit 18 cannot be pushed in while the trigger 13 is being operated, and it is possible to prevent the operation unit 18 from being operated while the trigger 13 is being operated.

10 Pneumatic tool 11 Output part 12 Grip 13 Trigger 13a Engagement part 14 Nose part 14a Ejection port 15 Magazine 16 End cap part 17 Ejection port 18 Operation part 18a Protruding edge 19 Valve body 19a Intake port 19b Internal pipeline 20 With valve body Force member 21 Joint parts 22 Duster piping 23 Pilot valve communication part 24 Communication passage 30 Piston 31 Cylinder 32 Head valve 33 Air chamber 35 Pilot valve (restriction mechanism)
36 Valve body 36a Sealing member 36b Flange 37 Valve housing 37a Upper accumulator chamber 37b Lower accumulator chamber 37c Supply port 37d Exhaust port 38 Stem 39 Stem urging member 40 Exhaust path 50 Lock member (restriction mechanism)
51 Head 51a Protruding part 52 Shaft part 52a Groove part

Claims (1)

A pneumatic tool with a striking mechanism and an air duster structure that operates using compressed air.
A trigger that accepts an operation for operating the striking mechanism,
An operation unit that accepts operations for operating the air duster structure,
A valve mechanism that controls the supply of compressed air to the striking mechanism,
With
A limiting mechanism for limiting the striking mechanism from operating while the air duster structure is operating is provided .
The valve mechanism operates by the load difference of the compressed air stored in the upper and lower accumulator chambers when the trigger is operated.
When the operation unit is operated, the pressure fluctuation for operating the valve mechanism does not occur even if the trigger is operated, and the valve mechanism is configured not to operate . Pneumatic tool with air duster.

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