JP2015016535A - Air tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air tool which has improved workability by enabling opening and closing of a valve from a plurality of directions.SOLUTION: An air tool 10 driven by an air motor 12 includes an air supply pipe 40 arranged inside a grip part 24 of a tool housing 20, a valve 60 arranged inside the air supply pipe 40 to open and close an air supply passage 40-1, a first valve control member 66 extending from the outside of the air supply pipe 40 into the air supply passage 40-1 and engaging with the valve 60 in the air supply passage 40-1 to control opening and closing of the valve 60, and a second valve control member 67 extending from the outside of the air supply pipe 40 into the air supply passage 40-1 in a direction different from that of the first valve control member 66 and engaging with the valve 60 in the air supply passage 40-1 to control opening and closing of the valve 60. The first and second valve control members 66, 67 extending in different directions can be operated from the outside of the tool housing 20.

Description

  The present invention relates to an air tool adapted to drive an air motor with compressed air.

  As this type of air tool, there are a grinding tool (Patent Document 1) that rotates an endless grinding belt to perform a grinding operation, and a grinding tool (Patent Document 2) that rotates a grinding wheel to perform a grinding operation. . In such an air tool, an air supply passage for supplying compressed air to an air motor inside a tool housing that constitutes a grip part that an operator grips during work is provided. A valve for opening and closing the air supply passage is provided in the air supply passage, and the valve operation lever and the valve are connected by operating a valve operation lever provided outside the tool housing. The valve opening / closing is controlled via a valve control rod. In general, only one such valve operation lever is provided at a position where the pneumatic tool can be operated with an index finger or thumb while holding the grip portion so that the air tool can be operated with one hand.

Japanese Patent No. 4912976 U.S. Pat. No. 4,729,436

  Whether the grip part is gripped by the left or right hand, or in which direction the grip part is gripped depends on the preference of the operator. In addition, depending on the position where the same operator performs the work such as grinding and the posture at the time of the work, for example, when holding the tool upside down, it is easier to work by changing the gripping method There is also. However, in the conventional pneumatic tools as described above, since the operation lever is provided so that it can be operated only in one direction and in only one direction, the gripping method of the grip portion is necessarily limited. Sometimes, it was difficult to work.

  In view of the above, an object of the present invention is to provide an air tool with improved workability by enabling the valve to be opened and closed from a plurality of directions.

That is, the present invention
In pneumatic tools driven by air motors,
A tool housing having a motor housing portion housing the air motor and a grip portion extending from the motor housing portion;
An air supply pipe disposed in the grip portion, the air supply inlet receiving compressed air from a compressed air supply source, the air supply outlet communicating with the air motor, and the air supply air extending from the air supply inlet to the air supply outlet A supply pipe having a path;
A valve disposed in the air supply pipe for opening and closing the air supply flow path;
A first valve control member that extends from the outside of the air supply pipe into the air supply flow path, engages with the valve in the air supply flow path, and controls opening and closing of the valve;
A second valve that extends from the outside of the air supply pipe into the air supply flow path in a direction different from that of the first valve control member and engages with the valve in the air supply flow path to control opening and closing of the valve A control member,
An air tool is provided in which the first and second valve control members are operable from the outside of the tool housing.

  In the air tool, since two valve control members for controlling the opening / closing of the valve from the outside of the tool housing are provided in different directions, the opening / closing operation of the valve can be performed from different directions. As a result, the operator who uses the pneumatic tool can perform the opening / closing operation of the valve with the valve control member which is easy to operate according to his / her preference and the situation of the work, so the workability is improved. To do.

Specifically, the valve is in close contact with the inner peripheral surface of the air supply flow path to close the air supply flow path, a valve spring that presses the valve seal member against the inner peripheral surface, and the valve A valve rod attached to a seal member and extending in the air supply flow path,
The first and second valve control members are engaged with the valve rod to displace the valve rod, thereby changing the close contact state with the inner peripheral surface of the valve seal member, so that the air supply flow path is changed. Can be opened.

More specifically, the valve rod has a front end portion extending to the air supply outlet side with respect to the valve seal member, and a rear end portion extending to the air supply inlet side with respect to the valve seal member. And
The first valve control member engages with the front end portion of the valve rod, and the second valve control member engages with the rear end portion of the valve rod to open and close the valve. be able to.

Preferably, each of the first and second valve control members has a rod receiving hole that is linearly reciprocally attached to the air supply pipe and receives the valve rod in a tiltable manner.
The valve rod may extend through the rod receiving holes of the first and second valve control members.

  Specifically, the moving direction of the first valve control member when the valve is opened by the first valve control member from the outside of the air supply pipe, and the second valve control member from the outside of the air supply pipe Thus, the first and second valve control members can be arranged so that the moving direction of the second valve control member when opening the valve is opposed to each other.

Preferably, a first valve operating lever that is movably attached to the tool housing and engages with the first valve control member to operate the first valve control member so that the valve opens. ,
A second valve operating lever, movably attached to the tool housing, for engaging the second valve control member and operating the second valve control member to open the valve;
The first valve operation lever is attached in a direction opposite to the moving direction of the first valve operation lever when the first valve operation lever is operated so as to open the valve by the first valve control member. A first biasing member that biases;
The second valve operation lever is attached in a direction opposite to the moving direction of the second valve operation lever when the second valve operation lever is operated so as to open the valve by the second valve control member. A second biasing member that biases,
When the valve is opened by operating the first valve operating lever, the second valve operating lever is not moved, and when the valve is opened by operating the second valve operating lever, the second valve operating lever is not moved. One valve operation lever can be prevented from being moved.

More preferably, the tool housing is provided movably on one of the tool housing and the first valve operating lever, and selectively engages the other of the tool housing and the first valve operating lever. A first lever fixing member for fixing and holding the first valve operating lever so as not to move with respect to the tool housing;
One of the tool housing and the second valve operating lever is movably provided, and selectively engages with the other of the tool housing and the second valve operating lever, and the second. A second lever fixing member for fixing and holding the valve operating lever with respect to the tool housing so as not to move,
Can be further provided.

  Alternatively, a fixed cover that can be exchanged with at least one of the first and second valve operating levers and cannot move relative to the tool housing when attached to the tool housing is further provided. You can also

  For example, when the work contents are fixed to a certain extent and only one valve operation lever is used, the grip position of the grip part is limited by the other valve operation lever, and the work efficiency is lowered. Is also possible. In such a case, by fixing the valve operating lever that is not used with a lever fixing member or exchanging it with the fixing lever, the grippable portion is not limited, and work efficiency is not lowered.

  Embodiments of an air tool according to the present invention will be described below with reference to the accompanying drawings.

1 is an overall side view of an air tool according to a first embodiment of the present invention. It is sectional drawing in the II-II line of FIG. It is sectional drawing in the III-III line of FIG. It is sectional drawing in the IV-IV line of FIG. FIG. 2 is a view showing a state where a lower valve operation lever of the air tool of FIG. 1 is operated. FIG. 2 is a view showing a state where an upper valve operation lever of the air tool of FIG. 1 is operated. It is sectional drawing which shows the modification which replaced the upper valve operation lever in FIG. 3 with the fixed cover. It is a fragmentary sectional view which shows the structure of the valve operation lever of the air tool which concerns on the 2nd Embodiment of this invention, Comprising: It is a figure which shows the state by which the upper valve operation lever was fixed. It is a fragmentary sectional view which shows the structure of the valve operating lever of the air tool which concerns on the 2nd Embodiment of this invention, Comprising: It is a figure which shows the state by which the lower valve operating lever was fixed. It is sectional drawing of the upper valve | bulb operation lever in the VIII-VIII line of FIG. 7A.

  As shown in FIGS. 1 and 2, the air tool 10 according to the first embodiment of the present invention includes a tool housing 20 that houses the air motor 12, a drive pulley 80 that is fixed to the output shaft 14 of the air motor 12, and A pulley support body 82 attached to the tool housing 20 so as to cover the drive pulley 80 and extending forward, and a pulley support bar 84 attached to the pulley support body 82 slidably in the front-rear direction and extending forward , An idle pulley 86 rotatably attached to the tip end portion 84-1 of the pulley support bar 84, and an endless grinding belt 87 wound between the drive pulley 80 and the idle pulley 86. The endless grinding belt 87 is driven to rotate by a driving force, and the endless grinding belt 87 is pressed against the work piece to thereby press the endless grinding belt 87 against the work piece. It is adapted to perform cutting work.

  The tool housing 20 includes a cylindrical air motor housing portion 21 and a cylindrical grip portion 24 extending rearward from the air motor housing portion 21 to the rear end 22. As shown in FIGS. 3 and 4, the air motor 12 is disposed in the air motor housing portion 21, and the air supply pipe 40 is disposed in the grip portion 24. The air motor accommodating portion 21 is provided with a compressed air inlet 21-1 for receiving compressed air sent to the air motor 12 so as to open in the grip portion 24. Further, an exhaust port 21-2 for exhausting the exhaust from the air motor 12 to the outside is provided at a position below the air motor housing portion 21. The air supply pipe 40 includes a front pipe 41 and a rear pipe 42, and a rear end portion 41-1 of the front pipe 41 and a front end portion 42-1 of the rear pipe 42 are in a sealingly engaged state via a seal member 43. It is connected. The air supply pipe 40 is disposed in the grip portion 24 so that the air supply outlet 40-2 at the front end of the front pipe 41 is connected to the compressed air inlet 21-1 via the seal member 50. A joint 54 for connecting an air tube (not shown) connected to a compressed air supply source is attached to the air supply inlet 40-3 at the rear end of the rear pipe 42. The joint 54 is connected to the air supply pipe 40. When the joint holding pin 56 inserted into the pin insertion hole 44 penetrating in the transverse direction is engaged with the engagement groove 55, the joint holding pin 56 is held so as not to come out of the air supply inlet 40-3 and is rotatable around the longitudinal axis. It is attached to become. In the present embodiment, the tool housing 20 is a resin member, and the air supply pipe 40 is a metal member formed by casting, and a metal air supply pipe is provided in the grip portion 24 of the tool housing 20. By arranging 40, the rigidity of the grip portion 24 is increased.

  A valve 60 for controlling the supply of compressed air to the air motor 12 by opening and closing the air supply channel 40-1 is provided in the air supply channel 40-1 of the air supply pipe 40. The valve 60 includes a valve seal member 62 that is hermetically engaged with a seal surface 47 formed in a stepped portion 46 provided in the air supply flow path 40-1, and an air supply flow path 40-1 fixed to the valve seal member 62. And a valve spring 63 set in the air supply passage 40-1 so as to press the valve seal member 62 against the seal surface 47. A cylindrical spring pedestal 68 is disposed in the front pipe 41 of the air supply pipe 40 so as to contact the front end portion 42-1 of the rear pipe 42, and the valve spring 64 includes the spring pedestal 68, the valve seal member 62, and the like. The valve seal member 62 is pressed toward the seal surface 47. The valve rod 63 is fixed to the valve seal member 62 in the vicinity of the center thereof, the front end portion 63-1 extending to the air supply outlet 40-2 side from the valve seal member 62, and the valve seal member 62. And a rear end portion 63-2 extending to the air supply inlet 40-3 side. A lower opening 48 is provided at a position in front of the valve seal member 62 of the air supply pipe 40, and the lower valve control extends through the lower opening 48 from the lower side to the upper side into the air supply flow path 40-1. A member (first valve control member) 66 is disposed so as to be able to reciprocate linearly with respect to the air supply pipe 40 in the vertical direction. A rod receiving hole 66-1 is formed in the upper end portion of the lower valve control member 66, and a front end portion 63-1 of the valve rod 63 is inserted into the rod receiving hole 66-1. Similarly, an upper opening 49 is provided at a position behind the valve seal member 62 of the air supply pipe 40, and passes through the upper opening 49 from the upper side to the lower side to reach the air supply flow path 40-1. An extending upper valve control member (second valve control member) 67 is disposed so as to be linearly reciprocable in the vertical direction with respect to the air supply pipe 40. A rod receiving hole 67-1 is formed at the lower end of the upper valve control member 67, and a rear end portion 63-2 of the valve rod 63 is inserted into the rod receiving hole 67-1.

  The valve 60 in the air supply pipe 40 is opened and closed from the outside of the air supply pipe 40 by a lower valve control member 66 and an upper valve control member 67. Specifically, the valve rod 63 is tilted by pushing one of the lower valve control member 66 and the upper valve control member 67 into the air supply flow path 40-1, whereby the valve seal member 62 is moved to the position shown in FIGS. As shown to 5B, it inclines and the clearance gap arises between the valve seal member 62 and the seal surface 47. FIG. The gap between the valve seal member 62 and the seal surface 47 is generated, so that the seal between the valve 60 and the air supply passage 40-1 is released, and the air supply passage 40-1 is connected to the air supply inlet 40-3 and the air supply outlet. It will be in the state communicated between 40-2. The rod receiving holes 66-1 and 67-1 of the lower valve control member 66 and the upper valve control member 67 have a sufficiently large diameter with respect to the diameter of the valve rod 63, and both end portions thereof are chamfered. And has a tapered shape. Since the rod receiving holes 66-1 and 67-1 have such a shape, when the lower valve control member 66 and the upper valve control member 67 move up and down, the valve rod 63 moves to the rod receiving hole 66-. 1 and 67-1 can be tilted.

  A lower valve operation lever (first valve operation lever) 70 for an operator to operate opening and closing of the valve 60 is disposed below the grip portion 24. The lower valve operating lever 70 slides in the vertical direction with respect to the grip portion 24 in a state of being biased downward by a lower lever spring (first lever spring) 71 set between the air supply pipe 40. It is attached as possible. The lower valve operating lever 70 has a valve control member receiving portion 70-1 that slidably receives the lower valve control member 66 at a position aligned with the lower valve control member 66 in the axial direction of the lower valve control member 66. Have. The lower valve operation lever 70 pushes the operation surface 70-2 exposed to the outside in the grip portion 24 of the tool housing 20 against the urging force of the lower lever spring 71, so that the valve control member receiving portion 70. The lower valve control member 66 received at -1 is displaced upward, thereby opening the valve 60 as shown in FIG. 5A. Similarly, an upper valve operation lever (second valve operation lever) 72 for an operator to open and close the valve 60 is disposed above the grip portion 24. The upper valve operating lever 72 slides in the vertical direction with respect to the grip portion 24 in a state of being biased upward by an upper lever spring (second lever spring) 73 set between the air supply pipe 40 and the upper valve operating lever 72. It is attached as possible. The upper valve operating lever 72 is slidably received by the upper valve control member 67 at a position aligned with the upper valve control member 67 in the axial phrase of the upper valve control member 67. Have The upper valve operation lever 72 pushes the operation surface 72-2 exposed to the outside in the grip portion 24 of the tool housing 20 against the urging force of the upper lever spring 73, whereby the valve control member receiving portion 72-1. The upper valve control member 67 received in the first position is displaced downward, thereby opening the valve 60 as shown in FIG. 5B.

  When the valve 60 is opened by operating the lower valve operating lever 70, the upper valve operating lever 72 is maintained at the upper position by the urging force of the upper lever spring 73 and does not move as shown in FIG. 5A. At this time, the upper valve control member 67 is displaced downward as the valve rod 63 tilts, and moves away from the valve control member receiving portion 72-1 of the upper valve operation lever 72. When the force for operating the lower valve operating lever 70 is released, the valve seal member 62, the valve rod 63, the lower valve control member 66, and the upper valve control member 67 are brought into the state shown in FIG. Return. The lower valve operating lever 70 moves downward by the downward force received from the lower valve control member 66 and the urging force of the lower lever spring 71 and returns to the state shown in FIG. Similarly, when the valve 60 is opened by operating the upper valve operating lever 72, the lower valve operating lever 70 is maintained at the lower position by the urging force of the lower lever spring 71 and does not move as shown in FIG. 5B. At this time, the lower valve control member 66 is displaced upward as the valve rod 63 is tilted, and moves away from the valve control member receiving portion 70-1 of the lower valve operation lever 70. When the force for operating the upper valve operation lever 72 is released, the valve seal member 62, the valve rod 63, the lower valve control member 66, and the upper valve control member 67 are brought into the state shown in FIG. Return. Further, the upper valve operating lever 72 moves upward by the upward force received from the upper valve control member 67 and the urging force of the upper lever spring 73 and returns to the state shown in FIG. In a situation where compressed air is supplied from the joint 54, the pressure of the compressed air also acts as a force for returning the valve seal member 62 to a closed state.

  As shown in FIG. 2, a bar accommodating hole 82-1 for receiving the pulley support bar 84 is provided at the distal end portion 84-1 of the pulley support main body 82 attached to the tool housing 20. A sliding insert 88 is inserted into the bar receiving hole 82-1, and the sliding insert 88 is screwed into a screw hole 82-2 that penetrates from the side surface of the pulley support main body 82 to the bar receiving hole 82-1. The pulley is fixed to the pulley support main body 82 by a fixed fixing screw 89. The pulley support bar 84 is inserted into an inner hole having a smooth surface of the sliding insert 88 and is held so as to be slidable in the front-rear direction with respect to the pulley support main body 82. Is formed with a slot limiting slide limiting hole 84-2 extending in the front-rear direction. A positioning screw 90 is inserted into the pulley support main body 82 from the side surface of the pulley support main body 82 and passes through the through hole 88-1 of the sliding insert 88 by a predetermined length in the front-rear direction of the pulley support bar 84. It is provided so as to extend into the extending slot hole-like sliding restriction hole 84-2. The positioning screw 90 holds the pulley support bar 84 so as not to rotate, and limits the range in which the pulley support bar 84 can slide in the front-rear direction. The pulley support bar 84 is formed with a spring accommodation hole 84-4 extending forward from the rear end face 84-3, and the pulley support bar 84 is urged forward in the spring accommodation hole 84-4. A spring 92 is set for this purpose. The spring 92 has a front end portion 92-1 abutting against a front end surface 84-5 of the spring accommodating hole 84-4, and a rear end portion 92-2 facing further rearward from the rear end surface 84-3 of the pulley support bar 84. It is set to extend. A spring support member 94 for supporting the spring 92 from its rear position is attached to the rear of the bar receiving hole 82-1 so as to be pivotable about a pivot shaft 94-1 on the pulley support main body 82. Yes. When the spring support member 94 is in the position shown in FIG. 2, the spring support projection portion 94-2 of the spring support member 94 engages with the spring seat 96 disposed at the rear end portion 92-2 of the spring 92, and the spring 92 is compressed with the pulley support bar 84. Due to the urging force of the spring 92, the idle pulley 86 provided at the front end of the pulley support bar 84 is pressed against the inner peripheral surface of the endless grinding belt 87, and a predetermined tension is applied to the endless grinding belt 87. . When the spring support member 94 is rotated approximately 90 degrees clockwise as seen in the figure, the spring seat 96 is not supported by the spring support protrusion 94-2, and the spring 92 extends to a natural length. In this state, the pulley support bar 84 can move rearward without receiving the biasing force of the spring 92, so that a gap is generated between the idle pulley 86 and the endless grinding belt 87, and the endless grinding belt 87 is removed. Is possible. The spring support member 94 is provided with a cover 98 that covers the drive pulley 80 from the side, and pivots together with the spring support member 94.

  In the air tool 10 according to the present embodiment, the valve operation levers 70 and 72 for operating the opening and closing of the valve 60 are respectively disposed at the upper and lower positions of the grip portion 24, so that the operator can be in various situations. In addition, since it becomes possible to use the valve operation levers 70 and 72 that are easier to operate, it is possible to improve the work efficiency.

  However, for example, when a certain work is repeatedly performed, such as a factory line work, when only one of the valve operation levers 70 and 72 is used, the grip portion is operated by the other valve operation levers 70 and 72. It is also conceivable that the place where 24 is held is limited and it becomes difficult to hold the grip portion, and the work efficiency is lowered. In such a case, as shown in FIG. 6, one valve operation lever (upper valve operation lever 72 in the illustrated example) is replaced with a fixed cover 69 fixed to the tool housing 20 and the air supply pipe 40. It is also possible. By exchanging with the fixed cover 69, the outer surface of the fixed cover 69 can also be used as a part of the grip part 24, so that the operator can easily grip the grip part 24. The fixed cover 69 may be configured such that the tool housing 20 is once disassembled and replaced with the valve operating levers 70 and 72, or the fixed cover 69 and the valve operating levers 70 and 72 are flexible. It may be configured by a member so that the replacement work can be performed without disassembling the tool housing 20.

  The air tool 110 according to the second embodiment of the present invention shown in FIGS. 7A to 8 is an air tool according to the first embodiment in that the valve operating levers 170 and 172 have lever fixing members 174 and 175. Different from the tool 10. The upper valve operating lever 172 has a fixing member receiving groove 172-3 at the rear position (right side in the drawing), and the upper lever fixing member 175 can slide in the fixing member receiving groove 172-3 in the front-rear direction. Is attached. As shown in FIG. 7A, when the upper lever fixing member 175 is in the rear position with respect to the upper valve operating lever 172, the engaging protrusion 175-1 of the upper lever fixing member 175 contacts the outer surface of the tool housing 120, and the upper valve The operation lever 172 is fixedly held so as not to move with respect to the tool housing 120. In this state, the valve 60 (not visible in FIGS. 7A and 7B) cannot be opened / closed by the upper valve operating lever 172, and the valve 60 can be opened / closed only by the lower valve operating lever 170. Similarly, the lower valve operation lever 170 has a fixing member receiving groove (not shown) and a lower lever fixing member 174 attached to the fixing member receiving groove so as to be slidable in the front-rear direction. As shown in FIG. 7B, when the lower lever fixing member 174 is in the rear position with respect to the lower valve operating lever 170, the engaging protrusion 174-1 of the lower lever fixing member 174 contacts the outer surface of the tool housing 120, and the lower valve The operation lever 170 is fixed and held so as not to move with respect to the tool housing 120. In this state, the valve 60 cannot be opened / closed by the lower valve operating lever 170, and the valve 60 can be opened / closed only by the upper valve operating lever 172. In this way, by allowing the valve operation levers 170 and 172 to be selectively fixed and held, the valve operation levers 170 and 172 that are not used are fixed, and the operation surfaces 170 of the fixed valve operation levers 170 and 172 are fixed. -2 and 172-2 can also be used as a part of the grip portion 124. In this embodiment, the lever fixing members 174 and 175 are provided on the valve operating levers 170 and 172. However, the lever fixing members 174 and 175 are provided on the tool housing 120 so as to be movable and selectively engage with the valve operating levers 170 and 172. Also good.

  In the above embodiment, the valve control members are set so as to reciprocate linearly in the opposite directions in the vertical direction, but may be set so as to reciprocate in the horizontal direction. You may set to the direction which does not oppose. Moreover, you may comprise so that a valve may be opened and closed by rotating instead of linear reciprocation. Further, three or more valve control members and a valve operating lever may be provided.

Air motor 10; Air motor 12; Output shaft 14; Tool housing 20; Air motor accommodating portion 21; Compressed air inlet 21-1; Exhaust port 21-2; Rear end 22; Grip portion 24; Air supply pipe 40; 1; Air supply outlet 40-2; Air supply inlet 40-3; Front pipe 41; Rear end part 41-1; Rear pipe 42; Front end part 42-1; Seal member 43; Pin insertion hole 44; Sealing surface 47; Lower opening 48; Upper opening 49; Seal member 50; Joint 54; Engaging groove 55; Joint holding pin 56; Valve 60; Valve seal member 62; Valve rod 63; Front end portion 63-1; 63-2; valve spring 64; lower valve control member (first valve control member) 66; rod receiving hole 66-1; upper valve control member (second valve control member) Control member) 67; Rod receiving hole 67-1; Spring pedestal 68; Fixed cover 69; Lower valve operation lever (first valve operation lever) 70; Valve control member receiver 70-1; Operation surface 70-2; Lever spring (first lever spring) 71; upper valve operation lever (second valve operation lever) 72; valve control member receiving portion 72-1; operation surface 72-2; upper lever spring (second lever spring) 73; drive pulley 80; pulley support main body portion 82; bar accommodating hole 82-1; screw hole 82-2; pulley support bar 84; tip end portion 84-1; sliding restriction hole 84-2; Spring receiving hole 84-4; front end face 84-5; idle pulley 86; endless grinding belt 87; sliding insert 88; 8-1; Fixing screw 89; Positioning screw 90; Spring 92; Front end 92-1; Rear end 92-2; Spring support member 94; Pivoting shaft 94-1; Spring support protrusion 94-2; 96; cover 98; air tool 110; tool housing 120; lower valve operation lever (first valve operation lever) 170; operation surface 170-2; upper valve operation lever (second valve operation lever) 172; operation surface 172 -2; Fixing member receiving groove 172-3; Lower lever fixing member (first lever fixing member) 174; Engaging protrusion 174-1; Upper lever fixing member (second lever fixing member) 175; Engaging protrusion Part 175-1;

Claims (8)

In pneumatic tools driven by air motors,
A tool housing having a motor housing portion housing the air motor and a grip portion extending from the motor housing portion;
An air supply pipe disposed in the grip portion, the air supply inlet receiving compressed air from a compressed air supply source, the air supply outlet communicating with the air motor, and the air supply air extending from the air supply inlet to the air supply outlet A supply pipe having a path;
A valve disposed in the air supply pipe for opening and closing the air supply flow path;
A first valve control member that extends from the outside of the air supply pipe into the air supply flow path, engages with the valve in the air supply flow path, and controls opening and closing of the valve;
A second valve that extends from the outside of the air supply pipe into the air supply flow path in a direction different from that of the first valve control member and engages with the valve in the air supply flow path to control opening and closing of the valve A control member,
An air tool in which the first and second valve control members are operable from the outside of the tool housing. The valve is attached to the valve seal member that is in close contact with the inner peripheral surface of the air supply channel and closes the air supply channel, a valve spring that presses the valve seal member against the inner peripheral surface, and the valve seal member. A valve rod extending in the air supply flow path,
The first and second valve control members are engaged with the valve rod to displace the valve rod, thereby changing the close contact state with the inner peripheral surface of the valve seal member, so that the air supply flow path is changed. The pneumatic tool according to claim 1, wherein the pneumatic tool is configured to open. The valve rod has a front end portion extending to the air supply outlet side with respect to the valve seal member, and a rear end portion extending to the air supply inlet side with respect to the valve seal member. ,
The first valve control member engages with the front end portion of the valve rod, and the second valve control member engages with the rear end portion of the valve rod to open and close the valve. The air tool according to claim 2. Each of the first and second valve control members is linearly attached to the air supply pipe so as to be reciprocally movable, and has a rod receiving hole for receiving the valve rod in a tiltable manner.
The pneumatic tool according to claim 2 or 3, wherein the valve rod extends through each rod receiving hole of the first and second valve control members.   The moving direction of the first valve control member when the valve is opened by the first valve control member from the outside of the air supply pipe, and the valve is opened by the second valve control member from the outside of the air supply pipe. 5. The air tool according to claim 4, wherein the first and second valve control members are arranged so that a moving direction of the second valve control member faces each other. A first valve operating lever, movably attached to the tool housing, for engaging the first valve control member and operating the first valve control member to open the valve;
A second valve operating lever, movably attached to the tool housing, for engaging the second valve control member and operating the second valve control member to open the valve;
The first valve operation lever is attached in a direction opposite to the moving direction of the first valve operation lever when the first valve operation lever is operated so as to open the valve by the first valve control member. A first biasing member that biases;
The second valve operation lever is attached in a direction opposite to the moving direction of the second valve operation lever when the second valve operation lever is operated so as to open the valve by the second valve control member. A second biasing member that biases,
When the valve is opened by operating the first valve operating lever, the second valve operating lever is not moved, and when the valve is opened by operating the second valve operating lever, the second valve operating lever is not moved. The pneumatic tool according to any one of claims 1 to 5, wherein one valve operating lever is not moved. One of the tool housing and the first valve operating lever is movably provided, and selectively engages with the other of the tool housing and the first valve operating lever, and the first A first lever fixing member for fixing and holding the valve operating lever so as not to move with respect to the tool housing;
One of the tool housing and the second valve operating lever is movably provided, and selectively engages with the other of the tool housing and the second valve operating lever, and the second. A second lever fixing member for fixing and holding the valve operating lever with respect to the tool housing so as not to move,
The air tool according to claim 6, further comprising:   A fixed cover that is replaceable with at least one of the first and second valve operating levers and is not movable relative to the tool housing when attached to the tool housing. The described air tool.

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