TWI568547B - Pneumatic tools - Google Patents

Description

Pneumatic driving tool

The present invention relates to a pneumatic driving tool that uses a compressed air as a driving source to drive a driving member.

As a pneumatic driving tool that uses a compressed air as a driving source to drive a driving member, a pneumatic driving machine that drives a driving member such as a nail or the like is known. In the case of such a pneumatic driving tool, the built-in piston is reciprocated by a compressed air which is a driving source by filling or atmospheric discharge. A driving driver for inserting a driving member such as a nail into the driving target is disposed on the piston, and the driving member can be driven into the driving member by the reciprocating motion of the driving driver. That is, the pneumatic driving tool includes a tool body having a built-in piston, a punching portion for driving the driving member by the action of the piston, and a handle portion for holding the operating lever. The pneumatic driving tool thus constructed, by pulling the operating operation lever, supplies compressed air to the upper chamber of the piston of the tool body to enlarge the upper chamber of the piston, thereby moving the piston downward. By the downward movement of the piston, the driving driver pushes the driving member in the driving direction and punches the driving member toward the driving object.

On the other hand, in such a pneumatic driving tool, it is known that when the compressed air in the upper chamber of the piston is discharged to the atmosphere, the side of the tool body is exhausted from the inside of the tool body to the outside of the tool body (for example, reference) Patent Document 1). According to the pneumatic driving tool that is exhausted from the side of the tool body, the side exhaust structure can be disposed in the direction of the length of the driving direction, so that the length of the driving direction can be shortened.

[Advanced technical literature]

[Patent Literature]

[Patent Document 1] Patent No. 3137229

On the other hand, when the compressed air in the upper chamber of the piston is discharged to the atmosphere, there is a case where high-pitched wind noise is generated due to the blowing of the compressed air. Therefore, there is a demand for suppressing such wind noise and improving workability. In particular, if the pneumatic driving tool is easy to operate and the length of the machine is designed as described above, since the opening space of the atmospheric discharge becomes a small opening space, it is more difficult to suppress the occurrence of the above-described wind noise.

The present invention has been made in view of such a situation, and the problem to be solved by the present invention is to discharge a compressed air used as a driving source to a pneumatic driving tool that uses a compressed air as a driving source to drive a driving member. In the atmosphere, the wind noise of the blown compressed air is suppressed.

In solving the above problems, the pneumatic driving tool of the present invention takes the following steps.

That is, the pneumatic driving tool according to the first aspect of the present invention is characterized in that the compressed air is caused to flow into the upper chamber of the piston by opening the main valve, and the piston is moved downward by the flow of the compressed air into the upper chamber. And the driving driver integrated with the piston is driven into the actuator, and after the driving operation of the driving driver, the compressed air flowing into the upper chamber of the piston flows into the lower chamber of the piston. The piston containing the drive into the drive Resetting to an initial position before the driving operation; and providing a side exhaust structure in the tool body including the driving driver and the piston, and driving the inside of the tool body after the driving operation Excess air is exhausted from the side of the tool body along the side of the driving operation direction to the outside of the tool body; the exhaust passage of the side exhaust structure and the trigger valve for performing the switching operation of the main valve The exhaust passage that energizes the air to the trigger valve exhaust structure outside the tool body is communicated such that the excess air is exhausted from the trigger valve exhaust configuration to the exterior of the tool body.

According to the pneumatic driving tool of the first invention, by opening the main valve, the compressed air flows into the upper chamber of the piston, and the piston is moved downward by the flow of the compressed air to the chamber, so that the driving driver integrated with the piston can be integrated. The driving action is performed so that the driving member can be driven. Here, according to the pneumatic driving tool, since the compressed air flowing into the upper chamber of the piston flows into the lower chamber of the piston after the driving operation of the driving driver, the piston including the driving driver is returned to the driving operation. Since the front initial position is configured, the return air that has been driven by the driving operation as described above can be circulated to return to the initial position before the driving operation by the compressed air that has been subjected to the driving operation. Thereby, it can be used as a pneumatic driving tool with high energy efficiency with improved utilization efficiency of compressed air. Moreover, on the one hand, the compressed air is circulated, and on the one hand, the air is exhausted to the outside of the tool body, and the compressed air that allows the driving action to be performed is not simply discharged to the atmosphere, but can be restored to the front of the driving operation. The return air used in the initial position is discharged to the atmosphere on the one hand, so that the compressed air used as the driving source can be dispersed and blown to the tool. The outside of the body can suppress the wind noise of the blown compressed air.

Further, according to the pneumatic driving tool, the exhaust passage of the side exhaust structure and the exhaust gas of the trigger valve exhaust structure for exhausting the energizing air of the trigger valve for performing the switching operation of the main valve to the outside of the tool body The passages are connected to exhaust excess air from the trigger valve exhaust configuration to the exterior of the tool body. Thereby, when the compressed air is discharged to the atmosphere, the side exhaust structure and the trigger valve exhaust structure can be dispersed and blown, and the wind noise of the blown compressed air can be suppressed.

The pneumatic driving tool according to the first aspect of the invention is the pneumatic driving tool according to the first aspect of the invention, wherein the trigger valve exhausting structure is provided with air that can flow into the trigger valve exhausting structure to the tool body The room that was previously inflated before the outside.

According to the pneumatic driving tool of the second aspect of the invention, since the trigger valve exhausting structure is provided with a chamber that allows the air flowing into the trigger valve exhausting structure to expand before being exhausted to the outside of the tool body, the compression can be performed. When the air is discharged to the atmosphere, the air is depressurized by expansion before the exhaust, so that the air is blown to the outside of the tool body. Thereby, the wind noise of the blown compressed air can be suppressed.

A pneumatic driving tool according to a third aspect of the invention is the pneumatic driving tool according to the first or second aspect of the present invention, wherein in the trigger valve exhausting structure, a buffer filter is provided to buffer the exhaust air to the outside of the tool body. Output.

According to the pneumatic driving tool of the third aspect of the invention, since the damper filter is provided in the trigger valve exhausting structure, the air is blown to the outside of the tool body, so that when the compressed air is discharged to the atmosphere, The air is blown out to the tool body by buffering the blowout force before venting. External. Thereby, the wind noise of the blown compressed air can be suppressed.

The pneumatic driving tool according to any one of the first to third aspects of the present invention, wherein the side exhaust structure includes an outer circumference of the main body casing and is formed to discharge the a cover body of the external air outlet of the excess air, and the cover body is attached to a periphery of the body casing via a portion of the protective body that is elastic and constitutes the outer casing.

According to the pneumatic driving tool of the fourth aspect of the invention, since the cover body is attached to the outer periphery of the main body casing via a part of the protective body which is elastic and which is formed outside the main body casing, the main body casing can be improved by the protective body. The assembled state between the covers.

A pneumatic driving tool according to a fifth aspect of the invention is the pneumatic driving tool according to the fourth aspect of the invention, wherein the protective member is a molded member of an elastic material, and the cover is mounted between the cover body and the main body casing by a part thereof. The above-mentioned protective body is elastically deformed to ensure the adhesion between the protective body and the body casing.

According to the pneumatic driving tool of the fifth aspect of the invention, since the molded member of the elastic material of the system is protected, and the cover body is elastically deformed by a part of the protective body installed between the cover body and the main body casing, the body and the body are secured. The adhesion between the outer casings can improve the assembly state of the outer casing and the cover on the one hand, and the stability of the exhaust function can be well ensured.

According to the pneumatic driving tool of the first aspect of the invention, the compressed air used as the driving source can be dispersed and blown outside the tool body, so that the wind noise of the blown compressed air can be suppressed.

According to the pneumatic driving tool of the second aspect of the invention, the wind noise of the blown compressed air can be suppressed by the expansion and decompression.

According to the pneumatic driving tool of the third aspect of the invention, the wind noise of the blown compressed air can be suppressed by the buffer filter buffing.

According to the pneumatic driving tool of the fourth aspect of the invention, the assembled state between the main body casing and the cover body can be improved.

According to the pneumatic driving tool of the fifth aspect of the invention, the assembly state of the main body casing and the cover body can be improved on the one hand, and the stability of the exhaust function can be satisfactorily ensured.

Hereinafter, an embodiment of a pneumatic driving tool for carrying out the present invention will be described with reference to the drawings.

In Figs. 1 and 2, a pneumatic driving tool 10 using compressed air as a driving source is illustrated. The pneumatic driving tool 10 is a driving tool configured by driving a nail (not shown) as a pneumatic nail of the driving member. In addition, FIG. 1 is an overall view of the tool for stereoscopically displaying the overall appearance of the pneumatic driving tool 10. 2 is an overall view of the tool for stereoscopically displaying the overall appearance of the pneumatic driving tool 10 at an angle different from that of FIG. 3 is an overall cross-sectional view of the tool showing the internal construction of the pneumatic driving tool 10 in a half section. 4 to 7 are cross-sectional views showing the internal structure of the tool body 15 with respect to the driving operation state of the pneumatic driving tool 10. That is, FIG. 4 is a cross-sectional view showing the internal structure of the tool body in the first actuation state, FIG. 5 is a cross-sectional view showing the internal structure of the tool body in the second actuation state, and FIG. 6 is a third actuation state. A cross-sectional view of the internal structure of the tool body, and Fig. 7 is a cross-sectional view showing the internal structure of the tool body that is driven into the fourth actuation state.

Here, when the pneumatic driving tool 10 is described, the side along the driving direction of the nail (not shown) of the pneumatic driving tool 10 is referred to as "the leading end side in the driving direction", and the pneumatic driving tool is used. The side of the nail that is driven in the opposite direction is called the "base end side of the driving direction". In addition, since the pneumatic driving tool 10 generally inserts a nail as a driving member in a direction perpendicular to the downward direction, it is referred to as an upper and lower direction in view of such a general driving method. Moreover, the directions are as attached to the figures. Further, the symbol W shown in Figs. 1 and 2 corresponds to the punching material of the object to be driven of the present invention.

The pneumatic driving tool 10 shown in FIGS. 1 and 2 generally includes a tool body 15, a driving portion 60, a handle portion 70, and a feed groove 77. First, before the tool body 15 is described, the driving portion 60, the handle portion 70, and the feeding groove 77 which are disposed with respect to the tool body 15 will be described.

The driver 60 is attached to the front end side of the tool body 15, and extends in the same manner as the extension structure of the tool body 15. The driving portion 60 conveys a portion of the nail loaded in the feeding groove 77 when a nail (not shown) is driven into the driving material W. Here, the nails conveyed by the driving unit 60 are driven by the driving driver 35 provided in the tool body 15. Therefore, the driving portion 60 has a function of guiding the driving movement of the driving driver 35 when the nail is driven into the driving material W, and also has a function of guiding the emission track of the nail to be driven. Specifically, an insertion passage 65 for inserting the driving driver 35 described below is provided. On the insertion passage 65, the nail that can be driven into the driver 35 is fed from the feed slot 77. Further, a contact point highest point 62 is provided on the driving portion 60. The contact highest point 62 has a function of detecting whether or not the front end of the driving portion 60 for punching the nail is pressed against the driving member W. In addition, as long as the highest point 62 of the contact is pressed against the material W In this case, the trigger valve opening state can be made by the pulling operation of the operation trigger 732 described below.

The handle portion 70 extends to the side (rear portion) of the tool body 15 in a direction intersecting the extended structure of the tool body 15. The handle portion 70 is formed in a shape in which the user can hold the outer shape with one hand, and is formed in a hollow configuration in which compressed air can be supplied to the inside. The inside of the inner hollow handle portion 70 is provided with a pressure accumulating chamber 71 for storing compressed air. In the pressure accumulation chamber 71, compressed air is supplied from the hose joint 72 provided at the rear end portion of the handle portion 70 and stored. Further, the hose joint 72 provided at the rear end portion of the handle portion 70 is configured to be connectable to a compressed air hose for supply of compressed air (not shown). A trigger valve 73 is provided at a root portion of the handle portion 70 that is coupled to the tool body 15. The trigger valve 73 includes a trigger valve body 731 having a valve configuration and an operation trigger 732 for inputting an operation of the trigger valve body 731. The trigger valve body 731 becomes a trigger valve open state by the pulling operation of the operation trigger 732, and becomes a trigger valve closed state by releasing the pulling operation of the operation trigger 732. Further, as will be described in detail below, when the trigger valve is opened, the supply of compressed air to the tool body 15 is blocked on the one hand, and the compressed air stored in the valve energizing chamber 56 is discharged to the atmosphere on the other hand. Further, when the trigger valve is closed, on the one hand, the supply of compressed air to the tool body 15 is resumed, and on the other hand, the compressed air is sent to the valve forming chamber 56 and stored.

That is, the compressed air stored in the valve energizing chamber 56 corresponds to the energizing air of the trigger valve of the present invention. Here, the compressed air stored in the valve energizing chamber 56 is exhausted by the trigger valve exhaust structure 74 by the trigger valve opening state. (discharge to the atmosphere) to the outside of the tool body 15. The trigger valve exhaust structure 74 generally includes a decompression chamber 75 that communicates with the outside of the tool body 15 and an exhaust passage 76 that vents the decompression chamber 75 from the valve energizing chamber 56. Further, the decompression chamber 75 and the exhaust path 76 form the present invention in which the compressed air stored in the valve forming chamber 56 is exhausted (discharged to the atmosphere) to the outside of the tool body 15 through an external vent (not shown). The exhaust passage of the trigger valve exhaust structure.

The decompression chamber 75 is a pressure swing chamber that allows the air flowing into the trigger valve exhaust structure 74 including the exhaust path 76 to expand before being exhausted to the outside of the tool body 15 as shown in the drawing, corresponding to the room of the present invention. . Therefore, an external vent (not shown) is provided on the proximal end (upper) side of the decompression chamber 75. That is, the decompression chamber 75 communicates with the outside of the tool body 15. Further, in the external vent port (not shown), a buffer filter is provided to buffer the air blowing force from the outside of the tool body 15. The buffer filter may be formed in a suitable resin sponge shape or in a suitable metal mesh shape, and may be configured to function as a function of buffering air blowing force when air is introduced. The composition of the know.

Further, an exhaust path 76 constituting a ventilation path from the valve forming chamber 56 is provided on the front end (lower side) of the decompression chamber 75. The exhaust path 76 is for the compressed air (energized air) stored in the valve forming chamber 56 to flow into the venting path of the decompression chamber 75 through the trigger valve 73. Specifically, the exhaust path 76 includes an outflow path 761 through which the compressed air flows out from the trigger valve 73 , and an outflow hole 762 through which the compressed air flows out to the decompression chamber 75 via the outflow path 761 . The outflow path 761 and the outflow hole 762 constituting the exhaust path 76 are formed by a suitable gap for ventilation.

Thereby, the compressed air stored in the valve energizing chamber 56 is opened by the trigger valve of the trigger valve 73, and flows into the decompression chamber 75 through the exhaust path 76 (the outflow path 761 and the outflow hole 762). The compressed air flowing into the decompression chamber 75 is expanded by the chamber structure and decompressed before being exhausted to the outside. Then, the air decompressed in the decompression chamber 75 is exhausted (discharged to the atmosphere) to the outside of the tool body 15 through an external vent (not shown).

The feed tank 77 is configured to sequentially feed a nail (not shown) to the above-described driving portion 60 every time it is driven. The feed chute 77 can be filled with a plurality of nails in a wound form. Further, reference numeral 78 is a connecting portion that connects the handle portion 70 and the feed groove 77. Further, the symbol 79 is used to suspend the hook of the pneumatic driving tool 10.

Next, the tool body 15 will be described with reference to the entire cross-sectional view of the pneumatic driving tool 10 of FIG. 3 and the cross-sectional view of the tool body 15 of FIGS. 4 to 7.

The tool body 15 is formed by incorporating various members in the outer casing structure 20 formed by the main body casing 21 and the top cover 25, and functions to generate driving force. The body casing 21 is formed in a substantially cylindrical shape. That is, the above-described driving portion 60 is disposed on the front end side of the main body casing 21.

The main body casing 21 has a cylindrical structure (cylinder 31) that generates a driving force. The top cover 25 is attached to the base end side opening portion 23 of the main body casing 21. As will be described in detail below, the main body casing 21 is formed in a substantially cylindrical shape, and the top cover 25 is formed in a substantially bowl shape, and the main body casing 21 is driven into the proximal end side opening portion 23 in such a manner as to plug the opening shape. Install the top cover 25. As such, the body casing 21 and the top cover 25 form the outer casing structure 20.

Further, a protective body 90 molded of an elastic elastic material (soft elastic material) is attached to the outer periphery of the main body casing 21. The protective body 90 is formed by having a new appearance pattern portion 91 in such a manner as to improve the design of the pneumatic driving tool 10. Further, in addition to the function of improving the design of the pneumatic driving tool 10 as described above, the protective body 90 also has the function of cushioning the impact of the pneumatic driving tool 10 such as the case where the pneumatic driving tool 10 is dropped. Therefore, the protective body 90 is formed on the one hand in the form of a new appearance of the pneumatic driving tool 10, and has a function of buffering the impact of the pneumatic driving tool 10, and is formed by the outer casing 21 and is elastic. Formed by a deformed elastomer.

The outer casing structure 20 has a substantially built-in piston structure 30 into which the driving portion 35 is inserted into the driving driver 35, and a valve structure 40 for actuating the piston structure 30.

The piston structure 30 generally includes a cylinder 31, a piston 33, a drive driver 35, and a baffle member 37. The cylinder 31 is formed in a substantially cylindrical shape and is supported by the above-described body casing 21. The base 31 is provided with a base end side communication hole 311 at the base end portion, a front end side communication hole 312 at the front end portion, and an intermediate portion communication hole at the intermediate portion. 313. The piston 33 is disposed to be reciprocally movable inside the cylinder 31. The piston 33 is supported by the cylinder 31 in such a manner as to reciprocate by the pressure change of the pressure chamber 50 described below. On the front end side (lower side) of the piston 33, a driving driver 35 that is integrated so as to extend in the moving direction of the piston 33 is provided. The driving driver 35 moves into the insertion passage 65 of the above-described driving portion 60 in response to the movement of the piston 33 toward the distal end side. At this time, the nails disposed on the insertion path 65 of the driving portion 60 (not shown) The display is entered by moving to the front end side of the drive driver 35. That is, the driving driver 35 performs the driving operation by the reciprocating movement of the piston 33.

The shutter member 37 also has a function of the movement shock of the cushion piston 33 and determines the position of the boundary end of the movement range of the piston 33. Specifically, the shutter member 37 includes a dead point baffle 371 that determines the top dead center position on the upper side of the piston 33, and a dead point baffle 372 that determines the lower dead point position on the lower side of the piston 33. The top dead center baffle 371 also functions to determine the position of the most proximal end side of the piston 33 and to cushion the movement of the base end side of the piston 33. The bottom dead center baffle 372 also functions to determine the position of the foremost end side of the piston 33 and to cushion the impact when the front end side of the piston 33 is moved.

The valve structure 40 is configured to substantially include a head valve 41, a partition wall 47, and a check valve 49. The valve structure 40 is divided by the swimming valve 41, the partition wall 47, the check valve 49, the outer casing structure 20, and the piston structure 30, whereby a plurality of pressure chambers 50 are formed. The plurality of pressure chambers 50 thus divided function as the valve structure 40 by switching the air to be separated from each other, or the air can flow out and communicate with each other.

Further, the swimming valve 41 corresponds to the main valve of the present invention. The swimming valve 41 is configured to open and close the flow of compressed air into the upper chamber 52 of the piston in order to perform the driving operation of the piston 33. As will be described later in detail, the swimming valve 41 is configured to open a valve by moving in a driving direction of a nail (not shown) to supply compressed air to the upper chamber 52 of the piston.

Specifically, the swimming valve 41 includes a valve body 42, a sheet portion 43, and an energizing Spring 44. The valve body 42, the sheet portion 43, and the energizing spring 44 are supported by the main body casing 21.

The valve body 42 is configured by an annular structure including substantially the first abutting portion 421, the second abutting portion 422, and the communication hole 423. The valve body 42 is disposed to be movable in the vertical direction, and an O-ring 57 for partitioning the pressure chambers 50 is attached to an appropriate portion of the inner circumferential surface and the outer circumferential surface. The first abutting portion 421 is formed on an end surface of the valve body 42 on the proximal end (upper end) side of the valve body 42 that can abut against the sheet portion 43. In other words, when the first abutting portion 421 comes into contact with the sheet portion 43, the swimming valve 41 is in a valve closed state. On the other hand, when the first abutting portion 421 is separated from the sheet portion 43, the floating valve 41 is in a valve open state. The second abutting portion 422 is formed as a sliding contact portion that can abut against the outer peripheral sliding contact surface 471 of the block wall 47. Therefore, the second abutting portion 422 can protrude toward the partition wall 47 on the one hand, and sliding contact with the outer peripheral sliding contact surface 471 of the partition wall 47 as the valve body 42 moves up and down by the mounted O-ring 57 on the other hand. . The communication hole 423 is formed in a shape that penetrates the inside and the outside of the valve body 42. The air on the inner peripheral side of the valve body 42 can be exhausted to the outer peripheral side of the valve body 42 through the communication hole 423. In other words, the communication hole 423, the exhaust chamber 55 and the side exhaust structure 80 described below form the air (exhausted air) on the inner peripheral side of the valve body 42 to be exhausted (to the atmosphere) to the outside of the tool body 15. The exhaust passage of the side exhaust structure of the present invention. Here, a communication passage 424 that communicates with the decompression chamber 75 is provided at a position opposite to the communication hole 423. In other words, when excess air on the inner peripheral side of the valve body 42 is exhausted to the outer peripheral side of the valve body 42 through the communication hole 423, it can be exhausted from the decompression chamber 75 (trigger valve exhaust structure 74) through the communication passage 424. To tool book The outside of the body 15.

The sheet portion 43 is fixedly supported by the top cover 25 of the above-described outer casing structure 20 at a position where the base end (upper end) side of the valve body 42 is adjacent. The sheet portion 43 is a portion where the first abutting portion 421 of the valve body 42 abuts. Therefore, in the sheet portion 43, the surface facing the first abutting portion 421 of the valve body 42 is formed in a planar shape that can abut against the first abutting portion 421. When the first abutting portion 421 is separated from the sheet portion 43 by the movement of the nail in the direction in which the nail of the swimming valve 41 is not shown, the input valve 41 is in the valve open state. When the first abutting portion 421 comes into contact with the sheet portion 43 by the reverse movement of the driving direction of the nail (not shown) of the swimming valve 41, the swimming valve 41 is in the valve closed state. .

The energizing spring 44 is a spring that energizes the valve body 42 toward the proximal end (upper end) side. Specifically, the energizing spring 44 is formed by a coil spring, and one end side abuts against the partition wall 47 and the other end side abuts against the valve body 42. In this way, the energizing spring 44 is energized by the internal pressure of the valve energizing chamber 56 and energizes the valve body 42 toward the base end (upper end) side. When the internal pressure of the valve energizing chamber 56 is equal to or higher than a certain pressure, the first abutting portion 421 of the valve body 42 comes into contact with the sheet portion 43, and the swimming valve 41 is in a valve closed state. When the internal pressure of the valve energizing chamber 56 does not become a constant pressure or more, the first abutting portion 421 of the valve body 42 is separated from the sheet portion 43, and the swimming valve 41 is in a valve open state.

The partition wall 47 is supported by the cylinder 31. In the partition wall 47, the outer circumferential sliding contact surface 471 is formed in contact with the second abutting portion 422 of the valve body 42 as described above. Therefore, the outer peripheral sliding contact surface 471 of the partition wall 47 has a The valve body 42 is moved up and down to slidably contact the surface shape of the second abutting portion 422 of the valve body 42 to be formed. Further, a communication hole 472 that communicates between the inside and the outside of the partition wall 47 is provided on the partition wall 47. Further, a check valve 49 is disposed on the outer side of the communication hole 472. That is, when the pressure in the cylinder 31 is higher than the pressure outside the cylinder 31, the check valve 49 functions to communicate with the inside and outside of the partition wall 47 by the communication hole 472. On the other hand, when the pressure outside the cylinder 31 is higher than the pressure in the cylinder 31, the check valve 49 functions to block the communication by the communication hole 472.

The swimming valve 41, the partition wall 47, the check valve 49, the outer casing structure 20, and the piston structure 30, which are configured as described above, are divided into a plurality of pressure chambers 50 as follows. That is, a supply chamber 51 as the pressure chamber 50 is formed in a range between the main body casing 21 and the floating valve 41 in the proximal end side of the swimming valve 41. Further, a piston upper chamber 52 as a pressure chamber 50 is formed on the side of the piston 31 between the piston 33 and the cylinder 31. Further, a driver 35 side is inserted between the piston 33 and the cylinder 31, and a piston lower chamber 53 as a pressure chamber 50 is formed. Further, a return chamber 54 as a pressure chamber 50 is formed between the lower portion side of the cylinder 31 and the main body casing 21. Further, an exhaust chamber 55 as a pressure chamber 50 is formed between the partition wall 47 and the valve body 42. Further, a valve energizing chamber 56 as the pressure chamber 50 is formed in the range between the main body casing 21 and the floating valve 41 in the front end side of the swimming valve 41.

Each of the pressure chambers 50 configured as described above causes the compressed air to flow from the pressure accumulation chamber 71 disposed in the handle portion 70 or the side exhaust structure 80 described below based on the operation of the operation trigger 732 by the user. The air is exhausted to the outside of the tool body 15, thereby changing the pressure of the internal air. In this way, by changing the internal pressure of each pressure chamber 50, a series of nails are completed. The sub-in action.

In the above-described pressure chambers 50 divided by the swimming valve 41, the partition wall 47, the check valve 49, the outer casing structure 20, and the piston structure 30, the driving operation of the driving nail is performed by changing the pressure as follows.

That is, when the user pulls the operation trigger 732 to trigger the valve 73 to be in the open state, the communication state between the pressure accumulating chamber 71 and the supply chamber 51 is blocked, and between the accumulator chamber 71 and the valve energizing chamber 56. The connected state is blocked. That is, when the trigger valve 73 is in the open state, the trigger valve 73 interrupts the supply of compressed air from the pressure accumulating chamber 71 to the supply chamber 51 and the valve energizing chamber 56. Further, before the trigger valve 73 is in the open state, the pressure accumulating chamber 71 and the supply chamber 51 are in communication with each other, and the accumulator chamber 71 and the valve energizing chamber 56 are also in communication with each other, and the self-pressure accumulating. The chamber 71 supplies compressed air to the supply chamber 51 and the valve energizing chamber 56. Therefore, the supply chamber 51 and the valve energizing chamber 56 are filled with compressed air having the same pressure as the pressure accumulation chamber 71.

Here, after the trigger valve 73 interrupts the supply of the compressed air to the valve energizing chamber 56 as described above, the trigger valve 73 discharges the compressed air stored in the valve forming chamber 56 to the atmosphere. As a result, the pressure inside the valve energizing chamber 56 is lowered, and the ability to energize the valve body 42 with the energizing spring 44 is reduced, so that the valve body 42 moves downward. Therefore, the first abutting portion 421 is separated from the sheet portion 43, and the swimming valve 41 is in a valve open state. That is, in the order of FIGS. 4, 5, and 6, the swimming valve 41 is moved downward from the valve closed state to the valve open state. Here, when the swimming valve 41 is in the valve open state, the compressed air stored in the supply chamber 51 as shown in FIG. 6 flows into the upper chamber of the piston in the cylinder 31 through the proximal end side communication hole 311. 52. As a result, the compressed air flowing into the upper chamber 52 of the piston increases the internal pressure of the upper chamber 52 of the piston to move the piston 33 downward. That is, the driving driver 35 integrated with the piston 33 as shown in FIG. 7 instantaneously moves in the driving direction, and enters the insertion path 65 of the driving portion 60. At this time, the driving driver 35 drives the nail conveyed from the feeding tank 77 into the driving material W. In this manner, after the driving driver 35 drives the nail into the driving material W, the compressed air stored in the piston upper chamber 52 flows into the return chamber 54 outside the cylinder 31 through the intermediate portion communication hole 313 and the communication hole 472. Further, a check valve 49 is disposed on the outer side of the communication hole 472 which is an inlet to the return chamber 54. Therefore, even if the pressure inside the upper chamber 52 of the piston is lowered, the backflow from the return chamber 54 into the cylinder 31 can be prevented, thereby maintaining the pressure inside the return chamber 54. Further, the return chamber 54 is in a state of being in communication with the piston lower chamber 53 in the cylinder 31 through the distal end side communication hole 312.

On the other hand, when the user releases the operation state of the trigger 732 and the trigger valve 73 is in the closed state, the pressure accumulating chamber 71 and the supply chamber 51 return to the communication state, and the pressure accumulating chamber 71 and the valve energizing chamber are provided. 56 also returned to the connected state. In other words, when the trigger valve 73 is in the closed state, the compressed air is supplied from the pressure accumulating chamber 71 to the supply chamber 51 and the valve energizing chamber 56. Therefore, compressed air of the same pressure as the pressure accumulation chamber 71 is filled in the supply chamber 51 and the valve energizing chamber 56. As a result, the pressure inside the valve energizing chamber 56 rises, and the ability to energize the valve body 42 with the energizing spring 44 increases, so that the valve body 42 moves upward. As a result, the first abutting portion 421 comes into contact with the sheet portion 43, and the swimming valve 41 is in a valve closed state.

That is, the swimming valve 41 returns from the valve open state to the valve closed state. The swimming valve When the valve is in the valve closed state, the flow of the compressed air from the supply chamber 51 to the upper piston chamber 52 is stopped, and the upper piston chamber 52 and the exhaust chamber 55 are in communication with each other. As a result, the compressed air stored in the interior of the upper chamber 52 of the piston becomes in a state in which it can flow out to the exhaust chamber 55. At this time, since the exhaust chamber 55 communicates with the side exhaust structure 80 described below through the communication hole 423, the compressed air stored in the piston upper chamber 52 passes through the exhaust chamber 55, the communication hole 423, and the side. The exhaust structure 80 is discharged to the atmosphere. Here, as described above, a communication passage 424 that communicates with the decompression chamber 75 is provided at a position opposite to the communication hole 423. Therefore, the compressed air stored inside the upper chamber 52 of the piston is discharged to the atmosphere through the side exhaust structure 80, and is discharged to the atmosphere via the trigger valve exhaust configuration 74 including the decompression chamber 75.

As a result, the pressure inside the upper chamber 52 of the piston becomes atmospheric pressure. Here, the pressure of the compressed air stored inside the lower piston chamber 53 communicating with the return chamber 54 exceeds the pressure inside the upper chamber 52 of the piston which is lowered to the atmospheric pressure, thereby moving the piston 33 upward. That is, the piston 33 integrated with the driving driver 35 is moved upward in a state of returning to the initial position shown in FIG. That is, the return air flowing into the return chamber 54 outside the cylinder 31 is the one that causes the piston 33 to perform the driving operation and reuses the compressed air flowing into the upper chamber 52 of the piston. The returning piston 33 can be returned to the initial position before the above-described driving operation by the return air flowing into the return chamber 54.

Next, the side exhaust structure 80 that communicates with the exhaust chamber 55 will be described. The side exhaust structure 80 is a structure in which the compressed air flowing out to the exhaust chamber 55 is discharged to the atmosphere as described above, and the exhaust chamber 55 is communicated with the outside of the tool body 15. In addition, flowing out of the exhaust chamber 55 The compressed air is equivalent to excess air stored inside the tool body 15 after being driven.

Figure 8 is a partially broken cross-sectional view showing the visible side exhaust structure 80. Fig. 9 is an enlarged cross-sectional view showing an enlarged view of the side exhaust structure 80 shown in Fig. 8. As shown in Fig. 8, the side exhaust structure 80 is disposed on the side surface of the main body casing 21 of the tool body 15, and is formed on the side surface in the front end direction of the nail driving direction. The side exhaust structure 80 includes an external air outlet 84 that communicates with the outside of the tool body 15 when the compressed air stored in the piston upper chamber 52 is discharged to the atmosphere.

As shown in FIG. 9, the side exhaust structure 80 is formed substantially by screwing the exhaust cover 83 to the body casing 21. As shown in FIGS. 1 and 2, six exhausting outlets 84 (84a, 84b, 84c, 84d, 84e, and 84f) are formed on the left and right sides of the tool body 15 in the exhaust hood 83. The six external air outlets 84 on the left and right sides are formed in an opening shape that communicates with the exhaust chamber 55 formed inside the main body casing 21. That is, a communication hole (not shown) that communicates with the exhaust chamber 55 so as to communicate with the external air outlet 84 is provided in the main body casing 21 of the screw vent 83. The external air outlet 84 is formed to be bilaterally symmetrical with respect to the tool body 15. The air blowing direction from the outside air outlet 84 to the outside of the tool body 15 is set to be inclined in the direction along the nail driving direction. In other words, the air blown from the external air outlet 84 is set in the direction toward the driving material W, which is inclined toward the front end side of the tool body 15.

Here, each of the six external air outlets 84 provided on the left and right sides of the tool body 15 is as shown in FIG. 2 and FIG. 3, and is driven in the direction of the driving member. In the direction of the intersection, the two rows of the plural are arranged in the front-rear direction. Specifically, the external air outlets 84a, 84b, and 84c and the external air outlets 84d, 84e, and 84f are formed in two rows in the front-rear direction in a shape symmetrical to each other. Further, the external air outlets 84a, 84b, and 84c and the external air outlets 84d, 84e, and 84f arranged in two rows are arranged in three directions along the driving direction (the upper and lower directions in the figure) of the driving member. . In other words, the three external air outlets 84a, 84b, and 84c along the driving direction of the driving member (the upper and lower directions are defined in the figure) and the external air outlets 84d, 84e, and 84f are symmetrical in the front-rear direction. The 2 columns are set side by side. Further, since the air blowing directions from the external air outlets 84 are set toward the direction in which the material W is driven as described above, the six external air outlets 84a, 84b, 84c, 84d, 84e, and 84f each have a The direction in which the air is blown is along the guiding shape toward the direction in which the material W is driven.

Specifically, the side exhaust structure 80 is formed as follows.

The side exhaust structure 80 is disposed in the side surface of the main body casing 21 along the side surfaces on the left and right sides of the driving direction of the nail. The side exhaust structure 80 generally includes an exhaust filter 81, a fastener 82, and an exhaust cover 83. The exhaust filter 81 is disposed between the main body casing 21 and the exhaust hood 83, and is disposed over the opening range of the external air outlet 84. Therefore, the air blown from the exhaust chamber 55 and blown out to the outside of the tool body 15 is buffered by the exhaust filter 81. The fastener 82 is composed of a screw member 821 and a washer 822, and the hood 83 is screwed to the body casing 21.

The exhaust hood 83 is formed as a molded component made of a plastic resin. The exhaust hood 83 is formed with six external air outlets 84 as described above. The exhaust The cover 83 is a member corresponding to the cover of the present invention. On the one hand, a part of the protective body 90 is inserted between the body casing 21 and attached to the outer periphery of the body casing 21. The exhaust hood 83 is provided with an external air outlet 84 for blowing compressed air outside the tool body 15, and is provided with a fastening hole 851 and a protruding hole 852.

The fastening hole 851 is a hole provided in such a manner that the hood 83 can be screwed to the body casing 21 by the screw member 821 (the fastener 82). Further, the protruding hole 852 is a hole provided so that the protruding buffer portion 95, which is a part of the protective body 90 interposed between the main body casing 21, is exposed to the outside from the exhaust cover 83. The protruding hole 852 is a hole corresponding to the through hole of the present invention, and is formed in a shape in which the protruding buffer portion 95 which is a part of the protective body 90 is protruded to the outside. Further, the shape of the protruding hole 852 is formed so as to extend in the direction in which the handle portion 70 extends, as shown in FIGS. 1 and 2, and is formed in accordance with the shape of the external air outlet 84, thereby improving the pneumatic driving tool 10. Design.

Further, the hood 83 is supported by the body casing 21 and the top cover 25 when fastened by the fastener 82. In other words, when the hood 31 is fastened by the fastener 82, the leg portion 86 supported by the outer peripheral surface 211 of the main body casing 21 is provided in a state in which the nip portion 92 of the protecting body 90 is inserted. Further, when the hood 63 is fastened by the fastener 82, the hood 63 is provided with a pressing portion 87 that is in contact with the outer peripheral surface 251 of the top cover 25 and supported. More specifically, the pressing portion 87 of the hood 83 presses the inner peripheral surface 261 of the mounting portion 26 of the top cover 25 toward the joint portion 22 (toward the inner peripheral side) of the main body casing 21.

In addition, the sandwiching portion 92 of the protective body 90 is inserted into the outer peripheral surface of the body casing 21 The 211 is elastically deformed between the foot portion 86 of the hood 83, and the elastic deformation ensures the adhesion of the hood 83 to the body casing 21. On the other hand, the pressing portion 87 of the hood 83 simply abuts against the outer peripheral surface 251 of the top cover 25, and presses the outer peripheral surface 251 of the top cover 25.

The protective body 90 is formed by molding an elastically deformable elastic body as described above, and has a new appearance pattern portion 91 for improving the design of the pneumatic driving tool 10. The protective body 90 is formed in a shape corresponding to the appearance of the hood 83. Specifically, the bank portion 93 is formed in accordance with the surface shape of the outer peripheral surface 831 of the exhaust hood 83. Further, in the protective body 90, a suitable positioning convex portion 94 is provided around the abutting portion 86 of the exhaust hood 83. Further, as described above, the sandwiching portion 92 of the protective body 90 inserted between the outer peripheral surface 211 of the main body casing 21 and the leg portion 86 of the hood 83 is elastically deformed by the insertion. By the elastic restoring force of the sandwiching portion 92 thus formed, the adhesion performance (sealing property) of the hood 83 with respect to the main body casing 21 can be improved.

Further, the protective body 90 includes a protruding buffer portion 95 that protrudes outward through the protruding hole 852 of the hood 83. When the protective body 90 is molded, the protruding buffer portion 95 is integrally molded with the appearance new pattern portion 91, the sandwich portion 92, and the bank portion 93. In other words, the protective body 90 is a member molded of an elastically deformable elastic body so as to include the appearance new pattern portion 91, the sandwiching portion 92, the bank portion 83, and the protruding buffer portion 95.

The protruding buffer portion 95 protrudes to the outside through the protruding hole 852 of the hood 83 as shown in FIG. The protruding buffer portion 95 is formed by fitting the hole shape of the protruding hole 852 of the hood 83 as shown in FIGS. 1 and 2 . Again, the highlight The buffer portion 95 is formed to protrude further outward than the exhaust cover 83. In other words, the protruding buffer portion 95 is formed such that the arrangement position of the outer peripheral end 951 of the protruding buffer portion 95 protrudes outward from the outer end position of the outer peripheral surface 831 of the hood cover 83, and the protruding buffer portion 95 is formed.

Next, the mounting structure of the main body casing 21 and the top cover 25 will be described.

The body casing 21 is molded by selecting magnesium on a material (molding material). Further, the top cover 25 is formed by selecting aluminum on a material (molding material). That is, the main body casing 21 is formed by molding a material having a lower specific gravity than the top cover 25 and having a weaker strength. Therefore, although the main body casing 21 is formed to be lower in rigidity than the top cover 25, the weight of the main body casing 21 itself can be reduced. Conversely, since the top cover 25 is formed of a material having a stronger forming strength than the main body casing 21, it is formed more rigidly than the main body casing 21.

As shown in Fig. 9, a top cover 25 is attached to the base end side opening portion 23 of the body casing 21 thus molded. That is, the mounting portion 26 of the top cover 25 that is driven into the proximal end side opening portion 23 of the main body casing 21 is such that the edge 24 of the main body casing 21 that is driven into the proximal end side opening portion 23 is disposed at the mounting portion 26 of the top cover 25. It is set in the manner of the inner peripheral surface 261 side. That is, the main body casing 21 and the top cover 25 are fastened by four-point screws by overlapping the joint portion 22 of the main body casing 21 with the mounting portion 26 of the top cover 25 (symbol 29 shown in FIGS. 1 and 2). ) to integrate. In detail, the length of the outer peripheral diameter of the joint portion 22 of the main body casing 21 is set shorter than the length of the inner circumference of the mounting portion 26 of the top cover 25, and enters the inner circumference of the mounting portion 26 of the top cover 25. side.

Therefore, the edge 24 of the main body casing 21 that is driven into the proximal end side opening portion 23 is disposed on the inner circumferential surface 261 side of the attachment portion 26 of the top cover 25. Specifically, the package The outer peripheral surface 221 of the joint portion 22 including the edge 24 of the base end side opening portion 23 of the main body casing 21 is brought into contact with the inner peripheral surface 261 of the mounting portion 26 of the top cover 25 to be joined. Here, as described above, the main body casing 21 and the top cover 25 are different in rigidity from each other due to the different molding materials, so that the rigidity of the mounting portion 26 of the top cover 25 also has a driving base end opening portion including the main body casing 21. The rigidity of the joint portion 22 of 23 is higher than that of the rigidity.

Further, between the joint portion 22 of the main body casing 21 and the attachment portion 26 of the top cover 25, the O-ring 28 is inserted in an elastic deformation manner. The O-ring 28 functions to increase the mutual adhesion between the joint portion 22 of the main body casing 21 and the attachment portion 26 of the top cover 25.

A pressing portion 87 of the hood 83 is abutted on the outer peripheral surface 262 of the mounting portion 26 of the top cover 25. That is, the exhaust hood 83 has a pressing portion 87 that is supported by the main body casing 21 and that abuts against the outer peripheral surface 262 of the mounting portion 26 of the top cover 25. By the abutment of the pressing portion 87, the expansion of the outer peripheral side of the mounting portion 26 of the top cover 25 is suppressed. That is, the pressing portion 87 of the hood 83 supports the attachment portion 26 of the top cover 25 to the joint portion 22 (toward the inner peripheral side) of the body casing 21. Further, the deformation of the joint portion 22 of the main body casing 21 can be suppressed by the pressing of the pressing portion 87 of the hood 83 by the attachment portion 26 of the top cover 25.

According to the pneumatic driving tool 10 described above, the following effects can be obtained.

That is, according to the above-described pneumatic driving tool 10, by opening the swimming valve 41, the compressed air flows into the upper chamber 52 of the piston, and the piston 33 is moved downward by the flow of compressed air into the upper chamber 52 of the piston, so that the piston 33 can be moved. The integrated driving driver 35 performs a driving operation so that the nail (injecting member) can be driven. Here, root According to the pneumatic driving tool 10, since the compressed air flowing into the upper chamber 52 of the piston flows into the lower chamber 53 of the piston after the driving operation of the driving driver 35, the piston 33 including the driving driver 35 is returned to the driving. Since the initial position before the operation is configured, the return air that is returned to the initial position before the driving operation can be returned to the above-described driving operation of the driving driver 35 by the driving operation by the compressed air that has been subjected to the driving operation. Thereby, it can be used as a pneumatic driving tool 10 having high energy efficiency with improved utilization efficiency of compressed air. Moreover, when the compressed air is circulated and exhausted to the outside of the tool body 15 on the one hand, the compressed air that performs the driving operation is not simply discharged to the atmosphere, but can be returned to the initial stage before the driving operation. The return air of the position is utilized and discharged to the atmosphere, so that the compressed air is dispersed and blown out to the outside of the tool body 15, so that the wind noise of the blown compressed air can be suppressed.

Further, according to the pneumatic driving tool 10, the exhaust passage of the side exhaust structure 80 is exhausted to the tool by the communication passage 424 and the energizing air for the trigger valve 73 for performing the switching operation of the floating valve 41. The exhaust passage of the trigger valve exhaust configuration 74 outside the body 15 communicates, and excess air can be vented from the trigger valve exhaust configuration 74 to the exterior of the tool body 15. Thereby, when the compressed air is discharged to the atmosphere, the side exhaust structure 80 and the trigger valve exhaust structure 74 can be dispersed and blown, and the wind noise of the blown compressed air can be suppressed. Further, according to the above-described pneumatic driving tool 10, since the trigger valve exhausting structure 74 is provided with a decompression chamber 75 in which the air flowing into the trigger valve exhausting structure 74 is expanded before being exhausted to the outside of the tool body 15, When the compressed air is discharged to the atmosphere, the pressure is reduced by expansion before the exhaust, so that the air can be blown to the outside of the tool body 15. Thereby, the wind noise of the blown compressed air can be suppressed. also, According to the pneumatic driving tool 10 described above, since the buffering filter venting structure 74 is provided with a buffer filter to buffer the air blowing force from the outside of the tool body 15, when the compressed air is discharged to the atmosphere, before the exhausting The air is blown out to the outside of the tool body 15 by the buffer filter buffering the blowing force. Thereby, the wind noise of the blown compressed air can be suppressed.

Further, according to the above-described pneumatic driving tool 10, since the swimming valve 41 is configured to open the valve by supplying compressed air to the upper chamber 52 of the piston by the movement in the driving direction of the nail (the driving member), Therefore, the valve energizing member for closing the valve can be abolished to be disposed on the side opposite to the direction in which the nail is driven. Thereby, the length of the driving direction of the pneumatic driving tool 10 can be shortened. Further, according to the pneumatic driving tool 10, a side exhaust structure 80 is provided on the side surface of the body casing 21 of the tool body 15 along the side of the nail driving direction for storing the tool in the tool after being driven in. The compressed air inside the exhaust chamber 55 of the body 15 is exhausted to the outside of the tool body 15. Thereby, the side exhaust structure can be disposed in the direction of the length of the driving direction, and the length of the driving direction can be shortened. Therefore, according to the pneumatic driving tool 10, the large volume as the pneumatic driving tool 10 can be minimized, and the ease of use as a tool can be further improved.

Further, according to the above-described pneumatic driving tool 10, since the hood 63 is inserted into the outer peripheral portion of the main body casing 21 by inserting the pinching portion 92 of the protective body 90 which is elastic and constitutes the outer casing 21, it can be attached The protective body 90 increases the assembled state between the main body casing 21 and the hood 83. Further, according to the pneumatic driving tool 10 described above, the protecting body 90 is a molded member of an elastic body of an elastic material, and the hood 83 is sandwiched by the protecting body 90 interposed between the body casings 21. The elastic deformation of the entrance portion 92 ensures adhesion to the body casing 21. Thereby, the assembled state of the main body casing 21 and the exhaust hood 83 can be improved, and the stability of the exhaust function can be satisfactorily ensured.

Further, according to the above-described pneumatic driving tool 10, since the protective body 90 is formed to have a shape that protrudes more outward than the outer peripheral surface 831 of the exhaust cover 83, even if the pneumatic driving tool 10 is dropped, for example, it collides with the ground. In the case of the case or the like, the hood 83 can be protected from damage by the shape protruding toward the outer side of the protective body 90. Further, according to the pneumatic driving tool 10, the protective body 90 interposed between the main body casing 21 and the exhaust hood 83 is formed to protrude outward from the outer peripheral surface 831 of the hood 83 through the protruding hole 852. Therefore, the protective body 90 protruding to the outside can be disposed close to the hood 83. Thereby, even in the case where the pneumatic driving tool 10 or the like is dropped to collide with the ground, for example, the shape of the protruding buffer portion 95 of the protective body 90 disposed adjacent to the exhaust hood 83 can more effectively protect the exhaust gas. The cover 83 is not damaged.

Further, according to the pneumatic driving tool 10, since the external air outlets 84a, 84b, and 84c and the external air outlets 84d, 84e, and 84f are formed in two rows in the front-rear direction in a shape symmetrical to each other, they can be formed efficiently. For areas outside the exhaust. Further, according to the above-described pneumatic driving tool 10, the external air outlets 84a, 84b, 84c arranged in two rows and the external air outlets 84d, 84e, 84f are driven along the driving direction of the driving member (illustrated in the drawing) The upper and lower directions are formed by arranging three each, so that the region facing the outside of the exhaust gas can be formed more effectively.

Further, according to the pneumatic driving tool 10 described above, the blowing direction from the external air outlet 84 for discharging excess compressed air is directed toward the nail. Since it is set to be inclined in the direction, the blowing direction can be set as the target to be driven, and the comfort at the time of use can be improved. Further, according to the above-described pneumatic driving tool 10, since the return air which returns the piston 33 to the initial position after the piston 33 is driven is reused, the compressed air which flows into the upper chamber 52 of the piston for the driving action of the piston 33 is reused. Since the mode is set, the compressed air for the driving operation can be effectively utilized.

Further, the pneumatic driving tool of the present invention is not limited to the above embodiment, and may be configured by changing an appropriate portion as follows.

For example, in the above embodiment, a pneumatic nailing will be described as an example of the pneumatic driving tool of the present invention. However, the pneumatic driving tool of the present invention is not limited thereto, and may be a pneumatic driving tool that uses a compressed air as a driving source and a nail or a machine member as a driving member.

Further, the shape of the exhaust hood 83 (cover) and the protective body 90 of the above embodiment is an embodiment of the side exhaust structure of the present invention, and the material and shape of the hood and the protector are used. It is not limited to this example, and a suitable material and shape can be selected. In other words, the protective body 90 is formed of a material having a resilient elastic body (soft elastic material) as a material. However, as the material of the protective body, a rubber resin material having elasticity may be used as a material.

Further, the air pressure of the compressed air used as the driving source of the pneumatic driving tool 10 of the above embodiment is used at a normal pressure (about 8 kg/cm ² ), so that it is at a high pressure (about 23 kg/cm ² ). The user can be either.

10‧‧‧Pneumatic driving tool

15‧‧‧Tool body

20‧‧‧Shell construction

21‧‧‧ body shell

22‧‧‧Combination of the body shell

23‧‧‧Into the base end opening

24‧‧‧Into the edge of the opening on the base side

25‧‧‧Top cover

26‧‧‧Installation site

28‧‧‧O-ring

29‧‧‧ Screw fastening parts

30‧‧‧Piston construction

31‧‧‧Cylinder

33‧‧‧Piston

35‧‧‧Into the drive

37‧‧‧Baffle members

40‧‧‧ valve construction

41‧‧‧Travel valve (main valve)

42‧‧‧ valve body

43‧‧‧Sheet Department

44‧‧‧Energy spring

47‧‧‧ partition wall

49‧‧‧ check valve

50‧‧‧ Pressure chamber

51‧‧‧Supply room

52‧‧‧Piston upper room

53‧‧‧The lower chamber of the piston

54‧‧‧Return room

55‧‧‧Exhaust room

56‧‧‧ valve empowerment room

57‧‧‧O-ring

60‧‧‧Incoming Department

62‧‧‧The highest point of the contact

65‧‧‧ insertion path

70‧‧‧Hands

71‧‧‧Accumulation room

72‧‧‧Hose connector

73‧‧‧trigger valve

74‧‧‧Trigger valve exhaust structure

75‧‧‧Decompression chamber

76‧‧‧Exhaust path

77‧‧‧feed trough

78‧‧‧Connecting Department

79‧‧‧ hook

80‧‧‧ Side exhaust structure

81‧‧‧Exhaust filter

82‧‧‧fasteners

83‧‧‧Exhaust cover (cover)

84 (84a, 84b, 84c, 84d, 84e, 84f) ‧ ‧ external blowout

86‧‧‧foot parts

87‧‧‧ Pressing parts

90‧‧‧Protection

91‧‧‧New appearance

92‧‧‧Clamping Department

93‧‧‧dike

94‧‧‧ positioning convex

95‧‧‧ protruding buffer

211‧‧‧ outside the outer shell of the body shell

221‧‧‧ outside the joint

251‧‧‧The outer surface of the top cover

261‧‧‧The inner circumference of the installation site

262‧‧‧ outside the installation site

311‧‧‧ proximal end side communication hole

312‧‧‧ front end side communication hole

313‧‧‧Intermediate communication hole

371‧‧‧Upper dead point baffle

372‧‧‧Bottom dead point baffle

421‧‧‧1st abutment

422‧‧‧2nd Abutment

423‧‧‧Connected holes

424‧‧‧Connected pathway

471‧‧‧Surface sliding contact surface

472‧‧‧Connected holes

731‧‧‧trigger valve body

732‧‧‧Operation trigger

761‧‧‧ outflow path

762‧‧‧ outflow hole

821‧‧‧screw components

822‧‧‧Washers

831‧‧‧ outer perimeter

851‧‧‧ fastening holes

852‧‧‧ protruding holes (through holes)

951‧‧‧ peripheral end

W‧‧‧Into the material (into the target)

Figure 1 is a perspective view of the overall appearance of the tool showing the overall appearance of the pneumatic driving tool.

Figure 2 is an overall perspective view of another tool showing the overall appearance of the pneumatic driving tool.

Figure 3 is an overall cross-sectional view of the tool showing the internal construction of the pneumatic driving tool in half section.

Fig. 4 is a cross-sectional view showing the internal structure of the tool body which is driven into the first actuation state.

Fig. 5 is a cross-sectional view showing the internal structure of the tool body which is driven into the second actuation state.

Fig. 6 is a cross-sectional view showing the internal structure of the tool body which is driven into the third actuation state.

Fig. 7 is a cross-sectional view showing the internal structure of the tool body which is driven into the fourth actuation state.

Figure 8 is a partially broken cross-sectional view showing the visible side exhaust structure.

Fig. 9 is an enlarged cross-sectional view showing an enlarged view of the side exhaust structure shown in Fig. 8.

10‧‧‧Pneumatic driving tool

15‧‧‧Tool body

20‧‧‧Shell construction

21‧‧‧ body shell

25‧‧‧Top cover

30‧‧‧Piston construction

31‧‧‧Cylinder

33‧‧‧Piston

35‧‧‧Into the drive

37‧‧‧Baffle members

40‧‧‧ valve construction

41‧‧‧Travel valve (main valve)

42‧‧‧ valve body

43‧‧‧Sheet Department

44‧‧‧Energy spring

47‧‧‧ partition wall

49‧‧‧ check valve

50‧‧‧ Pressure chamber

51‧‧‧Supply room

52‧‧‧Piston upper room

53‧‧‧The lower chamber of the piston

54‧‧‧Return room

55‧‧‧Exhaust room

56‧‧‧ valve empowerment room

57‧‧‧O-ring

73‧‧‧trigger valve

74‧‧‧Trigger valve exhaust structure

75‧‧‧Decompression chamber

76‧‧‧Exhaust path

90‧‧‧Protection

91‧‧‧New appearance

311‧‧‧ proximal end side communication hole

312‧‧‧ front end side communication hole

313‧‧‧Intermediate communication hole

371‧‧‧Upper dead point baffle

372‧‧‧Bottom dead point baffle

421‧‧‧1st abutment

422‧‧‧2nd Abutment

423‧‧‧Connected holes

424‧‧‧Connected pathway

471‧‧‧Surface sliding contact surface

472‧‧‧Connected holes

731‧‧‧trigger valve body

732‧‧‧Operation trigger

761‧‧‧ outflow path

762‧‧‧ outflow hole

Claims (6)

A pneumatic driving tool characterized in that: by opening a main valve, compressed air flows into an upper chamber of the piston, and the piston moves downward by the inflow of compressed air into the upper chamber, thereby integrating the piston Driving into the driver to enter the actor, and after the above-mentioned driving operation of the driving driver, the compressed air flowing into the upper chamber of the piston flows into the lower chamber of the piston, so that the driving driver is included The piston is configured to return to the initial position before the driving operation; and the tool body having the driving driver and the piston is provided with a side exhaust structure to enable the tool body after the driving operation Excess air is exhausted from the side of the tool body along the side of the driving action to the outside of the tool body; the exhaust path of the side exhaust structure and the trigger valve for performing the switching operation of the main valve Venting the exhaust gas passage of the trigger valve exhaust structure externally disposed to the outside of the tool body, so that the excess air can be exhausted from the trigger valve exhaust structure The side exhaust structure includes a cover provided on an outer circumference of the main body casing and forming an outer air outlet for discharging the excess air; and the cover body has elasticity and constitutes the outer body casing a state of a part of the protective body attached to the outer periphery of the main body casing; a forming member of the elastic material of the protective system; the cover body being partially interposed between the cover body and the main body casing The above-mentioned protective body is elastically deformed to ensure the adhesion between the protective body and the body casing. A pneumatic driving tool according to claim 1, wherein in said trigger valve exhausting configuration, a chamber is provided which allows air flowing into said trigger valve exhausting structure to expand before being exhausted to the outside of said tool body. The pneumatic driving tool of claim 1, wherein in the trigger valve exhausting structure, a buffer filter is provided to buffer a blowing force of the air exhausted to the outside of the tool body. The pneumatic driving tool of claim 2, wherein in the trigger valve exhausting structure, a buffer filter is provided to buffer the air blowing force to the outside of the tool body. The pneumatic driving tool according to any one of claims 1 to 4, wherein the cover body has a through hole penetrating in a direction perpendicular to the side surface, and the protection body has a buffer portion that protrudes outward from the through hole. Further, the outer end of the buffer portion is located outside the outer end of the cover. The pneumatic driving tool according to any one of claims 1 to 4, wherein the cover member has a cover member that blocks the proximal end side of the main body casing, and the cover body is provided with a pressing portion that abuts against the outer peripheral surface of the cover member.