TWI551405B - 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 such as a driving member such as a nail is known. Such a pneumatic driving tool is configured to reciprocate a built-in piston by filling compressed air as a driving source or opening it to the atmosphere. The piston is provided with a pusher for inserting a nail or the like into the driven object, and the piston is reciprocated to drive the driver into the driven object. Specifically, the pneumatic driving tool includes: a tool body having a built-in piston; a punching portion that punches the driving member by the action of the piston; and a handle portion having the operating lever and capable of being held by the hand. The pneumatic driving tool constructed in this manner delivers compressed air to the upper chamber of the piston of the tool body by pulling the operating lever, thereby expanding the upper chamber of the piston, thereby moving the piston downward. By the downward movement of the piston, the pushing member pushes the driving member in the driving direction, and the driving member is driven toward the driving object. Furthermore, after the driving tool is driven, the pneumatic air (return air) is sent to the lower chamber of the piston of the tool body corresponding to the release of the pulling operation of the operating rod, and the upper chamber of the piston is opened to the atmosphere. . In this way, the above-mentioned piston returns to the upper end position, and as a series of such pneumatic driving tools, the series driving operation ends.

On the other hand, it is known that when the compressed air in the upper chamber of the piston is opened to the atmosphere, the exhaust from the inside of the tool body to the outside of the tool body is self-contained. The manner in which the side of the tool body that intersects in the direction is blown out is set (for example, refer to Patent Document 1). Such a venting opening is provided on the side of the tool body to shorten the length of the machine in which the pneumatic driving tool is driven, thereby reducing the volume expansion as a pneumatic driving tool, thereby improving the ease of use as a tool.

Further, the tool present system is constructed by incorporating various members for generating a driving force into the outer casing structure, the outer casing structure including a main body casing formed into a substantially cylindrical shape, and a top cover attached to the base end side of the main body casing ( For example, refer to Patent Document 2). The top cover is formed in a substantially bowl shape and is attached in such a manner as to block the opening shape of the base end side of the body casing. The body casing and the top cover which are formed in such a manner to form a casing structure are independent molding members.

On the other hand, the air pressure of the compressed air used as the driving source of the pneumatic driving tool described above is a user from a normal pressure (about 8 kg/cm ² ), and a high pressure (about 23 kg/cm ^{2 ).} ) degree of use. Therefore, it is desirable that the joint section of the body casing and the top cover can withstand the load generated by the air pressure of the compressed air. That is, the joint portion of the main body casing and the top cover becomes a portion of the outer casing structure that is most likely to be deformed by the load generated by the air pressure of the compressed air.

[Previous Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent No. 3099285

[Patent Document 1] Japanese Patent No. 4064227

It is desirable for the above-described pneumatic driving tool to further shorten the length of the machine in the driving direction to further improve the ease of use as a pneumatic driving tool.

The present invention has been made in view of such circumstances, and the object of the present invention is to reduce the length of the machine in the driving direction by using compressed air as a driving source to drive the driving member into a pneumatic driving tool. The volume expansion as a pneumatic driving tool is minimized to further improve the ease of use as a tool.

Further, in order to further improve the ease of use as a pneumatic driving tool, there is a need to reduce the weight of the outer casing structure. Specifically, in forming the outer casing structure, there is a need to select a material having a relatively small specific gravity for a molding material of at least one of the main body casing or the top cover.

However, if a material having a relatively small specific gravity is selected for the molding material of at least one of the main body casing or the top cover, the joint portion of the main body casing and the top cover may be easily deformed.

The present invention has been made in view of such circumstances, and an object of the present invention is to improve the rigidity of the joint structure between the main body casing and the top cover while reducing the weight of the outer casing structure, thereby preventing deformation of both.

In order to solve the above problems, the pneumatic driving tool of the present invention employs the following mechanism.

In other words, the pneumatic driving tool according to the first aspect of the present invention is characterized in that the driving member is driven by using compressed air as a driving source, and the tool body for generating the driving force is provided with a pushing member. Used to drive in a driving member; a piston that causes the pushing member to perform a driving action; and a main valve that a piston that performs a driving operation to perform a flow of compressed air flowing into the upper chamber of the piston; and the main valve is configured to convey the compressed air to the upper chamber of the piston by moving along a driving direction of the driving member Opening the valve, and in the side surface of the body casing of the tool body along the side of the driving direction of the driving member, is disposed to discharge excess air existing inside the tool body after the driving into the tool The exhaust port structure outside the body.

According to the pneumatic driving tool of the first aspect of the invention, since the main valve is configured to open the valve by conveying the compressed air to the upper chamber of the piston by the movement in the driving direction of the driving member, the valve can be abolished. A valve energizing member for closing the valve is provided on the opposite side of the driving direction of the inlet. Thereby, the length of the machine in which the pneumatic driving tool is driven can be shortened. Further, according to the pneumatic driving tool of the first aspect of the invention, in the side surface of the main body casing of the tool body, along the side surface of the driving member in the driving direction, excess air which is provided to be present inside the tool body after being driven is provided. An exhaust port structure that is discharged to the outside of the tool body. Thereby, the vent structure can be eliminated by arranging the lengthwise direction of the machine in the driving direction, so that the length of the machine in the driving direction can be shortened. Therefore, according to the pneumatic driving tool of the first invention, the volume expansion as a pneumatic driving tool can be minimized, and the ease of use as a tool can be further improved.

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 exhaust port structure includes a cover that is disposed on an outer circumference of the main body casing and that forms an outer air outlet for discharging the excess air. The body is partially attached to the outer periphery of the body casing via a protective body having elasticity and constituting the outer casing of the body casing.

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

A pneumatic driving tool according to a third aspect of the invention, wherein the protective body is a molded member of an elastic material, and the cover system is partially inserted between the body and the body casing. The body is elastically deformed to ensure the adhesion to the body casing.

According to the pneumatic driving tool of the third invention, since the molded member of the elastic material of the protective system is protected, the cover system is ensured to be in close contact with the main body casing by elastically deforming a part of the protective body interposed between the cover body and the main body casing. Therefore, it is possible to improve the stability of the exhaust function while improving the assembly state of the main body casing and the cover.

The pneumatic driving tool according to the second aspect of the invention, wherein the protective body has a shape that protrudes outward from a peripheral surface of the cover body.

According to the pneumatic driving tool of the fourth aspect of the invention, since the protective body has a shape that protrudes outward from the outer surface of the cover, even when the pneumatic driving tool is dropped or the like, the ground contact is applied to the ground. The cover can also be protected from damage by the shape of the protective body protruding outward.

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 cover body is provided with a through-hole that is partially exposed between the protective body and the main body casing a hole, the protection system interposed between the body casing and the cover body, The through hole is formed to protrude outward from the outer peripheral surface of the cover.

According to the pneumatic driving tool of the fifth aspect of the invention, since the protection system interposed between the main body casing and the cover body is formed to protrude outward from the outer peripheral surface of the cover body through the through hole, the outer peripheral portion can be protruded outward. The protective body is disposed close to the cover. Thereby, even when the pneumatic driving tool is dropped or the like and comes into contact with the ground, the shape of the protecting body disposed close to the cover can be more effectively protected from damage.

A pneumatic driving tool according to a sixth aspect of the invention is the pneumatic driving tool according to the fifth aspect of the invention, wherein the plurality of external air outlets are arranged in a plurality of directions in a direction crossing a driving direction of the driving member.

According to the pneumatic driving tool of the sixth aspect of the invention, since the plurality of external air outlets are arranged in a direction intersecting the driving direction of the driving member, the outer surface of the exhaust gas can be efficiently formed. region.

A pneumatic driving tool according to a seventh aspect of the present invention, wherein the external air outlet is arranged in a plurality of directions along a driving direction of the driving member, and the external air is blown from the excess air for discharging the air. The direction in which the outlet is blown is set to be inclined in the direction along the driving direction of the driving member.

According to the pneumatic driving tool of the seventh aspect of the invention, since the plurality of external air outlets are arranged in a plurality of rows along the driving direction of the driving member, the outer surface region for exhausting can be formed more efficiently. Further, since the blowing direction of the external air outlet for discharging the excess air is set to be inclined in the direction along the driving direction of the driving member, the blowing direction can be directed toward the driving target, thereby improving the comfort in use. Sex.

The pneumatic driving tool according to the eighth aspect of the invention is the pneumatic driving tool according to the seventh aspect of the invention, wherein the return air system for returning the piston to the initial position after the piston is driven is set to cause the piston to be driven in. The compressed air flowing into the upper chamber of the piston is reused.

According to the pneumatic driving tool of the eighth aspect of the present invention, since the return air of the piston is returned to the initial position after the piston is driven in, the compressed air which is to flow into the upper chamber of the piston for the driving operation of the piston is set to be reused. Therefore, the compressed air for the driving action can be utilized efficiently.

A pneumatic driving tool according to a ninth aspect of the present invention is the pneumatic driving tool according to the first aspect of the present invention, wherein the outer casing structure of the tool body is configured to include a main body casing having a cylinder structure in which a driving force is generated. And a top cover mounted on the opening end side opening portion of the main body casing; and the mounting portion of the top cover relative to the driving base end side opening portion of the main body casing is such that the main body casing is hit The edge of the base end side opening is disposed on the inner peripheral side of the mounting portion of the top cover, and the rigidity of the mounting portion of the top cover is larger than the opening of the base end of the main body casing. High rigidity and rigidity.

According to the pneumatic driving tool of the ninth and thirteenth aspects of the present invention, the mounting portion of the top cover with respect to the opening of the base end side of the main body casing is disposed such that the end of the main body casing is driven into the opening of the proximal end side. Set on the inner peripheral side of the mounting portion of the top cover. Therefore, even if the end edge of the opening of the base end side of the main body casing is deformed by the load generated by the air pressure of the compressed air, the edge of the opening of the base end side may be abutted against the top cover. The inner peripheral portion of the mounting portion supports the opening of the proximal end side by the rigidity of the top cover End edge. Here, since the rigidity of the attachment portion of the top cover has a rigidity higher than the rigidity of the opening of the base end opening of the main body casing, when the end edge of the opening of the base end side is abutted and supported, It is more reliably supported so as to prevent deformation of the end edge of the opening on the proximal end side. Moreover, since the rigidity of the top cover itself is also high, deformation of the mounting portion of the top cover can also be prevented. In addition, for the top cover and the main body casing, the rigidity of the top cover having a relatively small volume is increased, so that the total weight of the top cover and the main body casing can be formed by reducing the rigidity of the smaller volume. The weight difference due to the difference in rigidity can be distributed, and the weight as a whole can be reduced.

Therefore, the rigidity of the outer casing structure can be reduced, and the rigidity of the joint region between the main body casing and the top cover can be improved, and deformation of both can be prevented.

A pneumatic driving tool according to a tenth aspect of the present invention, wherein the rigidity of the mounting portion of the top cover is selected by the molding material of the top cover to have a molding material larger than that of the main body casing. The high-strength molding material has rigidity higher than that of the opening of the main body casing that is driven into the proximal end side.

According to the pneumatic driving tool of the tenth and fourteenth aspects of the invention, the rigidity of the mounting portion of the top cover is improved by selecting a molding material having a higher strength than the molding material of the main body casing of the molding material of the top cover. The rigidity of the base end side opening portion of the main body casing which is driven into the base end side is high. Thereby, the weight of the main body casing can be reduced without complicating the shape of the main body casing, and the manufacture of the main body casing can be advantageously performed. In other words, according to the pneumatic driving tool of the second aspect of the invention, it is possible to prevent deformation of the end edge of the opening on the proximal end side, and it is possible to prevent The deformation of the mounting portion of the top cover can reduce the weight of the outer casing structure, and the manufacturing of the main body casing can be advantageously performed.

A pneumatic driving tool according to a tenth aspect of the invention, wherein the molding material of the body casing is magnesium, and aluminum is selected from the molding material of the top cover.

According to the pneumatic driving tool of the eleventh and fifteenth inventions, since the magnesium is selected for the molding material of the main body casing, the main body casing can be molded lightly and simply. Further, since aluminum is selected for the molding material of the top cover, the top cover can be molded lightly and simply. Here, since aluminum is a molding material having a higher strength than magnesium, the rigidity of the top cover can be made higher than the rigidity of the main body casing, and the entire top cover and the main body casing can be made lighter, and molding can be performed. simplify. Therefore, according to the pneumatic driving tool of the third invention, the rigidity of the top cover can be made higher than the rigidity of the main body casing, and the outer casing structure can be formed lightly and simply, and can be suppressed by widely used materials. manufacturing cost.

The pneumatic driving tool according to any one of the above-mentioned 9th to 11th, wherein the outer periphery of the main body casing is provided to be supported by the main body casing and abuts against the top A cover that extends over the outer surface of the mounting portion.

According to the pneumatic driving tool of the twelfth and the sixteenth aspects of the present invention, the outer periphery of the main body casing is provided with a cover that is supported by the main body casing and that abuts against the outer peripheral surface of the mounting portion of the top cover. Therefore, even if the mounting portion of the top cover is deformed by the load generated by the air pressure of the compressed air, the mounting portion of the top cover can be supported by the rigidity of the cover. Thereby, it can be stronger The deformation of the mounting portion of the top cover is prevented, and the deformation of the end edge of the opening of the base end side can be more firmly prevented.

According to the pneumatic driving tool of the first aspect of the invention, the volume expansion as the pneumatic driving tool can be minimized, and the ease of use as a tool can be further improved.

According to the pneumatic driving tool of the second 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 third aspect of the invention, the stability of the exhaust function can be more satisfactorily improved while improving the assembled state of the main body casing and the cover.

According to the pneumatic driving tool of the fourth aspect of the invention, the cover can be protected from damage by the shape protruding toward the outer side of the protective body.

According to the pneumatic driving tool of the fifth aspect of the invention, the cover can be more effectively protected from damage by the protective body disposed adjacent to the cover.

According to the pneumatic driving tool of the sixth aspect of the invention, the outward facing region for exhausting can be efficiently formed.

According to the pneumatic driving tool of the seventh aspect of the invention, it is possible to more efficiently form an area facing the outside for exhausting, and the blowing direction can be directed toward the target, thereby improving the comfort in use.

According to the pneumatic driving tool of the eighth aspect of the invention, the compressed air for performing the driving operation can be efficiently utilized.

According to the pneumatic driving tool of the ninth and thirteenth aspects, the rigidity of the outer casing structure can be reduced, and the rigidity of the joint region between the main body casing and the top cover can be improved, and deformation of both can be prevented.

According to the pneumatic driving tool of the tenth and fourteenth aspects, it is possible to prevent deformation of the end edge of the opening on the proximal end side, and to prevent deformation of the attachment portion of the top cover, and it is possible to reduce the weight of the outer casing structure, and advantageously The manufacture of the body casing is performed.

According to the pneumatic driving tool of the eleventh and fifteenth inventions, the rigidity of the top cover can be made higher than the rigidity of the main body casing, and the outer casing structure can be formed lightly and simply, and the manufacturing can be suppressed by the widely used material. cost.

According to the pneumatic driving tool of the twelfth and sixteenth aspects, the deformation of the mounting portion of the top cover can be firmly prevented, and the deformation of the end edge of the opening of the proximal end side can be firmly prevented.

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 as a pneumatic nailing machine that is driven by a nail (not shown) as a driving member. Further, Fig. 1 is a perspective view showing the overall appearance of the tool for the overall appearance of the pneumatic driving tool 10. Figure 2 is an overall view of the tool showing the overall appearance of the pneumatic driving tool 10 in a different angle from Figure 1. 3 is an overall cross-sectional view of the tool showing the internal configuration of the pneumatic driving tool 10 in a bisected cross 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 which the first operation state is driven, and Fig. 5 is a view showing the second operation state. FIG. 6 is a cross-sectional view showing the internal structure of the tool body in the third operation state, and FIG. 7 is a cross-sectional view showing the internal structure of the tool body in the fourth operation state.

Here, in the description of the pneumatic driving tool 10, the side of the pneumatic driving tool 10 along the driving direction of the nail (not shown) is referred to as the "front end side in the driving direction", and the pneumatic driving is performed. The side of the tool 10 opposite to the direction in which the nail is driven is referred to as the "starting direction base end side". Further, the pneumatic driving tool 10 is generally driven into the nail as a driving member in a vertically downward direction, and therefore, in view of such a general driving method, it is sometimes referred to as an up-and-down direction. Incidentally, these directions are as noted in the figures. Further, the symbol W shown in Figs. 1 and 2 is a punching material corresponding to 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 cassette 75. First, before the tool body 15 is described, the driving portion 60, the handle portion 70, and the cassette 75 disposed with respect to the tool body 15 will be described.

The driving portion 60 extends on the front end side of the tool body 15 in the same manner as the extension structure of the tool body 15. The driving portion 60 is a portion of the nail that is loaded and loaded in the cassette 75 when the driving material W is driven into a nail (not shown). Here, the nail sent to the driving portion 60 is driven in by the pusher 35 provided in the tool body 15. Therefore, the driving portion 60 has a function of guiding the driving movement of the pushing member 35 when the nail is driven into the driving member W, and also has a function of guiding the emission track of the nail to be driven. Specifically, a plug-in passage 65 for inserting the pusher 35 described later is provided. For the insertion passage 65, the nail that can be driven by the pusher 35 is conveyed from the cassette 75. Moreover, the contact portion 60 is provided with a contact Head 62. The contact head 62 has a function of detecting whether or not the front end of the driving portion 60 of the punching nail is pressed against the driving member W. Further, only when the contact head 62 is pressed against the driving member W, the trigger valve opening state caused by the pulling operation of the operation trigger 732 described later can be obtained.

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. The pressure accumulation chamber 71 is supplied with compressed air 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 an air hose (not shown) for supplying compressed air. 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 operating 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 later in detail, when the trigger valve is opened, the supply of compressed air to the tool body 15 is cut, and the compressed air stored in the valve forming chamber 56 is opened to the atmosphere. When the trigger valve is closed, the compressed air is again supplied to the tool body 15 and the compressed air is sent to the valve forming chamber 56 for storage.

The cassette 75 is configured to be conveyed to the above-described driving portion 60 every time it is driven in. Nail (not shown). The cassette 75 can fill a plurality of nails in a roll shape. Further, the reference numeral 76 is a connection portion connecting the handle portion 70 and the cassette 75. Further, the symbol 77 is used to hook the hook of the pneumatic driving tool 10.

Next, the overall 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 will be described with reference to the tool body 15.

The tool body 15 is constructed 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 at the front end portion of the main body casing 21.

The body casing 21 has a cylinder structure (cylinder 31) that generates a driving force. A top cover 25 is attached to the base end side opening portion 23 of the main body casing 21. As will be described later in detail, the main body casing 21 is formed in a substantially cylindrical shape, and the top cover 25 is formed in a substantially bowl shape in such a manner that the main body casing 21 is driven into the proximal end side opening portion 23 to block the shape of the opening. A top cover 25 is mounted. As such, the body housing 21 and the top cover 25 form the housing construction 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 an appearance design portion 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 a function of cushioning the impact of the pneumatic driving tool 10 when the pneumatic driving tool 10 is dropped. Therefore, the protective body 90 is designed by the design of the pneumatic driving tool 10 in view of the design of the pneumatic driving tool 10 and has the function of cushioning the impact of the pneumatic driving tool 10. Formed outside the body casing 21, and formed by molding an elastically deformable elastomer.

The outer casing structure 20 has a piston structure 30 in which the pusher 35 is inserted into the above-described driving portion 60, and a valve structure 40 for operating the piston structure 30.

The piston structure 30 generally includes a cylinder block 31, a piston 33, a pusher 35, and a baffle member 37. The cylinder block 31 is formed in a substantially cylindrical shape and is supported by the above-described body casing 21. The cylinder block 31 is provided with a base end side communication hole 311 at the base end portion, and a front end side communication hole 312 at the front end portion, and an intermediate portion is provided at the intermediate portion in such a manner that air can flow in and out of the inside of the cylinder block 31. The communication hole 313 is connected. The piston 33 is reciprocally disposed inside the cylinder block 31. The piston 33 is supported by the cylinder block 31 in such a manner as to reciprocate by a pressure change of the pressure chamber 50 which will be described later. An integrated pusher 35 is provided on the front end side (lower side) of the piston 33 so as to extend in the moving direction of the piston 33. The pusher 35 causes the piston 33 to enter the insertion passage 65 of the above-described driving portion 60 corresponding to the movement on the distal end side. At this time, the nail (not shown) disposed in the insertion passage 65 of the driving portion 60 is driven by the movement of the pusher 35 toward the distal end side. That is, the pusher 35 performs the driving operation by the reciprocating movement of the piston 33.

The plate member 37 also has a function of absorbing the movement shock of the piston 33 and determining the position of the limit end of the movement range of the piston 33. Specifically, the plate member 37 includes a dead point baffle 371 above the upper dead center position on the upper side of the piston 33, and a dead center baffle 372 below the lower dead center position on the lower side of the piston 33. The top dead center baffle 371 determines the most proximal side position of the piston 33, and also The function of buffering the impact when the base end side of the piston 33 is moved is exerted. The bottom dead center baffle 372 determines the position of the foremost end side of the piston 33, and also functions to buffer the impact when the front end side of the piston 33 is stopped.

The valve structure 40 generally includes a swimming valve 41, a partition wall 47, and a check valve 49. The valve configuration 40 is zoned by the swim valve 41, the partition wall 47, the check valve 49, the outer casing construction 20, and the piston configuration 30, thereby forming a plurality of pressure chambers 50. The plurality of pressure chambers 50 thus partitioned function as the valve structure 40 by switching to a non-contact state in which air is not allowed to flow in and out, or in a communication state in which air can flow in and out.

Further, the swimming valve 41 corresponds to the main valve of the present invention. The swimming valve 41 opens and closes the flow of compressed air into the upper chamber 52 of the piston in order to cause the piston 33 to perform the driving operation. The stroke valve 41 will be described in detail later, and is configured to open the valve by the movement of the nail in a driving direction (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 body portion 43, and the energizing spring 44 are supported and disposed on the 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 communicating portion 423. The valve body 42 is movably disposed 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 body portion (upper end) of the valve body 42 that can abut against the sheet body portion 43. In other words, when the first abutting portion 421 comes into contact with the sheet portion 43, the swimming valve 41 is formed. The valve is closed. On the other hand, when the first abutting portion 421 is separated from the sheet portion 43, the swimming valve 41 is in a valve open state. The second abutting portion 422 is formed as a sliding portion that can abut against the outer peripheral sliding surface 471 of the partition wall 47. Therefore, the second abutting portion 422 protrudes toward the partition wall 47, and can be slidably attached to the outer peripheral sliding surface 471 of the partition wall 47 as the valve body 42 moves up and down by the mounted O-ring 57. The communication hole 423 is formed in a shape that penetrates through the inside and the outside of the valve body 42. The air on the inner peripheral side of the valve body 42 can be discharged to the outer peripheral side of the valve body 42 through the communication hole 423.

The sheet portion 43 is fixedly supported by the top cover 25 of the above-described outer casing structure 20 at a position adjacent to the base end (upper end) of the valve body 42. As described above, the sheet portion 43 is a portion where the first abutting portion 421 of the valve body 42 abuts. Therefore, the sheet body portion 43 faces the first abutting portion 421 of the valve body 42 and is formed in a planar shape in which the first abutting portion 421 can abut. As a result, when the driving direction of the needle of the floating valve 41 and the nail (not shown) is moved in the forward direction, the first abutting portion 421 is separated from the sheet portion 43 and the swimming valve 41 is opened. The valve is open. In addition, when the driving direction of the nail of the swimming valve 41 and the nail (not shown) is reversed, the first abutting portion 421 comes into contact with the sheet portion 43, and the swimming valve 41 becomes The valve is closed.

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 of a coil spring, and one end side abuts against the partition wall 47 and the other end side abuts against the valve body 42. Thus, the energizing spring 44 energizes the valve body 42 toward the base end (upper end) side together with the ability to be generated by the internal pressure of the valve energizing chamber 56. Here, when the internal pressure of the valve energizing chamber 56 becomes a specific pressure or more, the first abutting portion of the valve body 42 The 421 comes into contact with the sheet portion 43, and the swimming valve 41 is in a valve closed state. Further, when the internal pressure of the valve energizing chamber 56 is not higher than a specific pressure, the first abutting portion 421 of the valve body 42 is separated from the sheet portion 43, and the swimming valve 41 becomes a valve. Open state.

The partition wall 47 is disposed to be supported by the cylinder block 31. As described above, the partition wall 47 is formed to be in contact with the second abutting portion 422 of the valve body 42 so as to be in contact with the outer peripheral sliding surface 471. Therefore, the outer peripheral sliding surface 471 of the partition wall 47 is formed to have a surface shape that can be slidably attached to the second abutting portion 422 of the valve body 42 as the valve body 42 moves up and down. Further, the partition wall 47 is provided with a communication hole 472 communicating with the inside and outside of 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 block 31 is higher than the pressure outside the cylinder block 31, the check valve 49 functions to communicate the inside and the 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 be disconnected by the communication of 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 as follows to form a plurality of pressure chambers 50. That is, the supply chamber 51 as the pressure chamber 50 is formed in the range of the proximal end side of the swimming valve 41 between the main body casing 21 and the swimming valve 41. Further, on the side of the swimming valve 41 between the piston 33 and the cylinder block 31, a piston upper chamber 52 as a pressure chamber 50 is formed. Further, a piston lower chamber 53 as a pressure chamber 50 is formed on the side of the pusher 35 between the piston 33 and the cylinder 31. Further, a return chamber 54 as a pressure chamber 50 is formed between the lower side portion of the cylinder block 31 and the main body casing 21. Further, between the partition wall 47 and the valve body 42, a pressure chamber 50 is formed. Exhaust chamber 55. Further, a valve energizing chamber 56 as a pressure chamber 50 is formed in a range from the front end side of the swimming valve 41 between the main body casing 21 and the floating valve 41.

Each of the pressure chambers 50 configured as described above is configured such that the compressed air flows from the pressure accumulation chamber 71 disposed in the handle portion 70 described above by the user's operation of the operation trigger 732, or is configured via the exhaust port described below. 80 is discharged to the outside of the tool body 15, whereby the pressure of the internal air is changed. By thus changing the internal pressure of each of the pressure chambers 50, a series of nail driving operations are completed.

As described above, the valve 41 is partitioned by the swimming valve 41. The check valve 49, the outer casing structure 20, and the pressure chambers 50 of the piston structure 30 are arranged to perform the driving operation of the driving nail by changing the pressure as follows.

In other words, when the trigger valve 73 is opened by the user pulling the operation trigger 732, the communication state between the pressure accumulating chamber 71 and the supply chamber 51 is cut off, and the pressure accumulating chamber 71 and the valve energizing chamber are cut off. The state of communication between 56. That is, when the trigger valve 73 is in the open state, the trigger valve 73 interrupts the supply of compressed air from the accumulator 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 pressure accumulating chamber 71 and the valve energizing chamber 56 are also in communication with each other. The pressure accumulation chamber 71 supplies compressed air to the supply chamber 51 and the valve energizing chamber 56. Therefore, the supply chamber 51 and the valve-increasing chamber 56 are filled with compressed air of the same pressure as the pressure accumulation chamber 71.

Here, after the trigger valve 73 cuts off the supply of the compressed air to the valve energizing chamber 56 as described above, the trigger valve 73 further opens the compressed air existing inside the valve forming chamber 56 to the atmosphere. As a result, the pressure inside the valve energizing chamber 56 Ascending, the ability to energize the valve body 42 with the energizing spring 44 is reduced, so that the valve body 42 moves downward. Thereby, 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, the swimming valve 41 moves downward in a manner from the valve closed state to the valve open state in the order of FIGS. 4, 5, and 6. When the swimming valve 41 is in the valve open state, as shown in FIG. 6, the compressed air existing inside the supply chamber 51 flows into the piston upper chamber 52 in the cylinder 31 through the proximal end side communication hole 311. As a result, the compressed air flowing into the upper chamber 52 of the piston raises the internal pressure of the upper chamber 52 of the piston, thereby moving the piston 33 downward. That is, as shown in FIG. 7, the pusher 35 integrated with the piston 33 instantaneously moves in the driving direction, and enters the insertion passage 65 of the driving portion 60. At this time, the pusher 35 drives the nail conveyed from the cassette 75 into the driving material W. In this manner, after the pusher 35 drives the nail into the driving material W, the compressed air existing inside the upper chamber 52 of the piston passes through the intermediate portion communication hole 313 and the communication hole 472, and flows into the return chamber 54 outside the cylinder 31. 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 to the cylinder 31 can be prevented, thereby maintaining the pressure inside the return chamber 54. In addition, the return chamber 54 is in a state of being communicated with the lower piston chamber 53 in the cylinder 31 through the distal end side communication hole 312.

On the other hand, when the user releases the trigger state of the operation trigger 732 and the trigger valve 73 is turned off, the pressure accumulation chamber 71 and the supply chamber 51 return to the communication state, and the pressure accumulation chamber 71 and the valve chamber The energy chambers 56 are also restored to a connected state. That is, when the trigger valve 73 is in the closed state, the supply of compressed air from the accumulator chamber 71 to the supply chamber 51 and the valve energizing chamber 56 is reopened. beginning. Therefore, the supply chamber 51 and the valve-increasing chamber 56 are filled with compressed air of the same pressure as the pressure accumulation chamber 71. As a result, the pressure inside the valve energizing chamber 56 rises, and the ability to energize the valve body 42 together 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 is restored from the valve open state to the valve closed state. When the swimming valve 41 is in the valve closed state, the inflow of 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 existing inside the upper chamber 52 of the piston becomes a state in which it can flow out to the exhaust chamber 55. At this time, since the exhaust chamber 55 leads to the exhaust port structure 80 described later, the compressed air existing inside the upper chamber 52 of the piston is opened to the atmosphere via the exhaust chamber 55 and the exhaust port structure 80. That is, the pressure inside the upper chamber 52 of the piston becomes atmospheric pressure. Here, the pressure of the compressed air existing 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 pusher 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 block 31 is reused as the compressed air that flows into the upper chamber 52 of the piston by the piston 33 being driven. By returning the return air to the return chamber 54, the piston 33 after the driving is returned to the initial position before the above-described driving.

Next, an exhaust port structure 80 that communicates with the exhaust chamber 55 will be described. The vent structure 80 is configured to form the venting chamber 55 and the tool in such a manner that the compressed air flowing out to the exhaust chamber 55 is opened to the atmosphere as described above. The state of the external connection of the body 15. Further, the compressed air flowing out to the exhaust chamber 55 corresponds to excess air existing inside the tool body 15 after being driven.

Figure 8 is a partial cross-sectional view showing the vent configuration 80 in a manner. Fig. 9 is an enlarged cross-sectional view showing the vent structure 80 shown in Fig. 8 in an enlarged manner. As shown in FIG. 8, the vent structure 80 is disposed in the side surface of the body casing 21 of the tool body 15 along the side surface which is the front end direction of the driving direction of the nail. The exhaust port structure 80 is configured to be connected to an external air outlet 84 that communicates with the outside of the tool body 15 when the compressed air existing inside the piston upper chamber 52 is opened to the atmosphere.

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

Here, six different sides are respectively disposed on the left and right sides of the tool body 15 As shown in FIGS. 2 and 3, the portion air outlets 84 are arranged in the front-rear direction so as to be divided into two segments of a plurality of segments so as to be grouped in a direction intersecting the driving direction of the driving members. Specifically, the external air outlets 84a, 84b, and 84c and the external air outlets 84d, 84e, and 84f are formed in two directions in the front-rear direction in a shape that is symmetrical with each other. Further, the external air outlets 84a, 84b, and 84c and the external air outlets 84d, 84e, and 84f which are grouped into two stages are arranged three by three in the driving direction of the driving member (the upper and lower directions in the figure). . In other words, the three external air outlets 84a, 84b, and 84c and the outer air outlets 84d, 84e, and 84f are arranged in the front-rear direction along the driving direction of the driving member (the upper and lower directions of the drawing) so as to be symmetric with each other. Set in 2 segments. Further, since the air blowing direction from the external air outlets 84 is set toward the direction in which the material W is driven as described above, each of the six external air outlets 84a, 84b, 84c, 84d, 84e, and 84f is provided. There is a guiding shape in which the direction in which the air is blown is along the direction toward the driving material W.

In detail, the vent structure 80 is formed in the following manner.

The vent structure 80 is disposed on the side surfaces of the main body casing 21 along the left and right sides of the driving direction of the nail. The vent configuration 80 generally includes an exhaust filter 81, a fastener 82, and a vent cap 83. The exhaust filter 81 is disposed between the main body casing 21 and the exhaust cover 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. The fastener 82 is composed of a screw member 821 and a washer 822, and the vent cover 83 is screwed with respect to the body casing 21.

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

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

Further, the vent cap 83 is supported from the body casing 21 and the top cover 25 when fastened by the fastener 82. That is, when the vent cover 83 is fastened by the fastener 82, the leg portion 86 which is supported from the outer peripheral surface 211 of the main body casing 21 is provided in a state in which the nip portion 92 of the protective body 90 is inserted. Further, when the vent cover 83 is fastened by the fastener 82, the vent cover 83 is provided with a pressing portion 87 that abuts against the outer peripheral surface 251 of the top cover 25 to obtain support. More specifically, the pressing portion 87 of the exhaust cover 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.

Furthermore, the sandwiching portion 92 of the protective body 90 is formed by the outer peripheral surface of the body casing 21 The 211 is elastically deformed by being sandwiched between the leg portions 86 of the vent cap 83, and the adhesion of the vent cover 83 to the body casing 21 is ensured by the elastic deformation. On the other hand, the pressing portion 87 of the vent cap 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 elastomer as described above. The design portion 91 is provided to improve the design of the pneumatic driving tool 10. The protective body 90 is formed in a shape corresponding to the design of the exhaust cover 83. Specifically, the bank portion 93 is formed along the surface shape of the outer peripheral surface 831 of the exhaust cover 83. Further, in the protective body 90, an appropriate positioning convex portion 94 is provided around the leg portion 86 of the exhaust cover 83. Further, as described above, the sandwiching portion 92 of the protective body 90 interposed between the outer peripheral surface 211 of the main body casing 21 and the leg portion 86 of the exhaust cover 83 is elastically deformed by the sandwiching therebetween. By the elastic restoring force of the sandwiching portion 92 thus formed, the adhesion performance (sealing property) of the vent cap 83 with respect to the main body casing 21 can be improved.

Further, the protective body 90 includes a protruding buffer portion 95 which is exposed to the outside through the protruding hole 852 of the above-described vent cover 83. When the protective buffer 90 is molded as the protective body 90, the protruding buffer portion 95 is integrally molded together with the design portion 91, the sandwiching 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 design portion 91, the sandwiching portion 92, the bank portion 93, and the protruding buffer portion 95.

As shown in FIG. 9, the protruding buffer portion 95 protrudes to the outside through the protruding hole 852 of the vent cover 83. As shown in FIGS. 1 and 2, the protruding buffer portion 95 is formed by fitting a hole shape of the protruding hole 853 of the vent cover 83. Further, the protruding buffer portion 95 is formed to protrude beyond the exhaust cover 83. That is, highlight The buffer portion 95 is formed such that the arrangement position of the outer peripheral end 951 of the protruding buffer portion 95 protrudes beyond the outer end position of the outer peripheral surface 831 of the exhaust cover 83 to form the protruding buffer portion 95.

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

The body casing 21 is formed by selecting magnesium from a material (molding material). Further, the top cover 25 is formed by selecting aluminum from a material (molding material). That is, the main body casing 21 is formed by molding a material having a lower specific gravity than the lid top 25 and having a weak strength. Therefore, the main body casing 21 is formed to be lower in rigidity than the top cover 25, and the weight of the main body casing 21 itself can be reduced. On the other hand, since the top cover 25 is formed by molding a material having a stronger strength than the main body casing 21, it is formed to be higher in rigidity 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 main 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 end edge 24 of the main body casing 21 that is driven into the proximal end side opening portion 23 is disposed on the top cover 25. The inner peripheral surface 261 side of the portion 26 is set. That is, the main body casing 21 and the top cover 25 are fastened by four points by superimposing the joint portion 22 of the main body casing 21 and the mounting portion 26 of the top cover 25 on the inside and the outside (see FIGS. 1 and 2). The symbol 29) is integrated. Specifically, the length of the outer peripheral diameter of the joint portion 22 of the main body casing 21 is set to be shorter than the inner circumferential diameter of the attachment portion 26 of the top cover 25, and enters the inner peripheral side of the attachment portion 26 of the top cover 25.

Therefore, the end 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 outer peripheral surface 221 of the joint portion 22 of the main body casing 21 including the end edge 24 of the base end side opening portion 23 is in contact with the inner peripheral surface 261 of the mounting portion 26 of the top cover 25. In the state of being connected, the combination is made. Here, as described above, since the main body casing 21 and the top cover 25 are different in rigidity from each other due to the molding material, the rigidity of the mounting portion 26 of the top cover 25 also has a lower opening portion than the main body casing 21 including the driving base end side. The rigidity of the joint portion 22 of 23 is high.

Furthermore, an O-ring 28 is inserted between the joint portion 22 of the body casing 21 and the mounting portion 26 of the top cover 25 in an elastically deformed manner. The O-ring 28 functions to increase the mutual contact state between the joint portion 22 of the main body casing 21 and the attachment portion 26 of the top cover 25.

The pressing portion 87 of the vent cover 83 abuts against the outer peripheral surface 262 of the mounting portion 26 of the top cover 25. That is, the above-described exhaust cover 83 has a pressing portion 87 that is supported to be supported by the main body casing 21 and abuts against the outer peripheral surface 262 of the mounting portion 26 of the top cover 25. The expansion of the outer peripheral side of the attachment portion 26 of the top cover 25 is suppressed by the abutment of the pressing portion 87. That is, the pressing portion 87 of the exhaust cover 83 supports 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. Further, the deformation of the joint portion 22 of the main body casing 21 can be suppressed by the pressing portion 87 of the hood cover 83 being pressed by the attachment portion 26 of the top cover 25.

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

That is, according to the above-described pneumatic driving tool 10, since the swimming valve 41 is configured to open the valve by conveying the compressed air to the upper chamber 52 of the piston by the movement in the driving direction of the nail (the driving member) Therefore, it is possible to abolish the valve energizing member for closing the valve at a portion opposite to the direction in which the nail is driven. Thereby, the length of the machine in which the pneumatic driving tool 10 is driven can be shortened. Further, according to the pneumatic driving tool 10, the body casing 21 of the tool body 15 is further In the side surface of the side of the nail in the driving direction of the nail, an exhaust port structure 80 for discharging the compressed air existing inside the exhaust chamber 55 of the tool body 15 to the outside of the tool body 15 after being driven is provided. . Thereby, the vent structure can be eliminated by abolishing the longitudinal direction of the machine in the driving direction, so that the length of the machine in the driving direction can be shortened. Therefore, according to the pneumatic driving tool, the volume expansion as a pneumatic driving tool can be minimized, so that the ease of use as a tool can be further improved.

Further, according to the above-described pneumatic driving tool 10, the exhaust cover 83 is attached to the outer periphery of the main body casing 21 via the sandwiching portion 92 having the elastic body and forming the protective body 90 outside the main body casing 21, so that the protection can be protected by the protection. The body 90 increases the assembled state between the body casing 21 and the exhaust cover 83. Further, according to the pneumatic driving tool 10 described above, the protecting body 90 is a molded member of an elastic body as an elastic material, and the venting cap 83 is inserted into the sandwiching portion 92 of the protecting body 90 between the body and the body casing 21. It is elastically deformed to ensure the adhesion to the body casing 21. Thereby, the stability of the exhaust function can be more satisfactorily improved while improving the assembled state of the main body casing 21 and the exhaust cover 83.

Further, according to the above-described pneumatic driving tool 10, the protective body 90 is formed to protrude beyond the outer peripheral surface 831 of the exhaust cover 83, so that even if the pneumatic driving tool 10 is dropped or the like, it contacts the ground. In the case of the like, the vent cover 83 may be protected from damage by the shape protruding to the outer side of the protective body 90. Further, according to the above-described pneumatic driving tool 10, the protective body 90 interposed between the main body casing 21 and the exhaust cover 83 is formed by projecting through the protruding hole 852 to the outside of the outer peripheral surface 831 of the exhaust cover 83. Therefore, the protective body 90 protruding to the outside can be disposed close to the exhaust cover 83. In this way, even in the case When the pneumatic driving tool 10 is dropped or the like and is in contact with the ground, the shape of the protruding buffer portion 95 of the protective body 90 disposed adjacent to the exhaust cover 83 can be more effectively protected from the exhaust cover. 83 is protected from damage.

Further, according to the pneumatic driving tool 10 described above, since the external air outlets 84a, 84b, and 84c and the external air outlets 84d, 84e, and 84f are formed in a symmetrical shape in two directions in the front-rear direction, the efficiency can be improved. The ground forms an area facing the outside for exhaust. Further, according to the pneumatic driving tool 10 described above, the external air outlets 84a, 84b, and 84c and the external air outlets 84d, 84e, and 84f are divided into two stages, along the driving direction of the driving member (as specified in the drawings). Since the three vertical directions are arranged three by three, the area facing the outside of the exhaust gas can be formed more efficiently.

Further, according to the pneumatic driving tool 10 described above, the blowing direction of the external air outlet 84 for discharging excess compressed air is set to be inclined in the direction in which the nail is driven, so that the blowing direction can be oriented. The object is driven in, which improves the comfort during use. Further, according to the pneumatic driving tool 10 described above, the return air that returns the piston 33 to the initial position after the piston 33 is driven is recompressed to cause the piston 33 to perform the driving operation and to flow into the upper chamber 52 of the piston. Since the air is set in a manner, the compressed air for performing the driving operation can be utilized efficiently.

Further, the pneumatic driving tool of the present invention is not limited to the above-described embodiment, and may be configured by appropriately changing portions as described below.

For example, in the above embodiment, a pneumatic nailing machine is exemplified as the pneumatic driving tool of the present invention. However, the pneumatic driving tool of the present invention is not limited thereto, and may be used as a driving source using compressed air. And the final stud or the filling member is used as a pneumatic driving tool for the driving member.

Moreover, the shape of the vent cover 83 (cover) and the protective body 90 of the above-described embodiment is an embodiment related to the vent structure of the present invention, and the materials of the vent cover and the protector are The shape is not limited to this example, and an appropriate material and shape can be selected. In other words, the protective body 90 described above is molded of a material having an elastic elastic body (soft elastic material) as a material. However, the material of the protective body 90 may be formed by using a rubber resin material having elasticity as a material.

Further, according to the above-described pneumatic driving tool 10, the following effects can be exhibited.

That is, according to the pneumatic driving tool 10 described above, the mounting portion 26 of the top cover 25 that is driven into the proximal end side opening portion 23 with respect to the main body casing 21 is such that the main body casing 21 is driven into the end of the proximal end side opening portion 23. The edge is disposed so as to be disposed on the inner peripheral surface 261 side of the mounting portion 26 of the top cover 25. Therefore, even if the end edge 24 of the main body casing 21 that is driven into the proximal end side opening portion 23 is deformed by the load generated by the air pressure of the compressed air, the end edge 24 of the driving base end side opening portion 23 can be abutted. The end portion 24 of the inner peripheral surface portion 261 of the mounting portion 26 of the top cover 25 is supported by the rigidity of the top cover 25 to support the end edge 24 of the base end side opening portion 23. Here, since the rigidity of the attachment portion 26 of the top cover 25 has a rigidity higher than that of the base end side opening portion 23 of the main body casing 21, the end edge 24 of the base end side opening portion 23 is abutted. When the support is performed, it can be more reliably supported, so that the deformation of the end edge 24 of the proximal end side opening portion 23 can be prevented from being broken. Moreover, since the rigidity of the top cover 25 itself is also high, the security of the top cover 25 can also be prevented. The deformation of the mounting portion 26. In addition, since the rigidity of the top cover 25 and the top cover 25 having a relatively small volume in the main body casing 21 is improved, the total weight of the top cover 25 and the main body casing 21 can be reduced. The rigidity of the person is formed, and the weight difference caused by the difference in rigidity can be distributed, and the weight as a whole can be reduced. Therefore, the rigidity of the outer casing structure 20 can be reduced, and the rigidity of the joint region between the main body casing 21 and the top cover 25 can be improved, and deformation of both can be prevented.

Further, according to the above-described pneumatic driving tool 10, the rigidity of the mounting portion 26 of the top cover 25 is selected by the material (molding material) of the top cover 25 to have a higher strength than the material (molding material) of the main body casing 21, Further, the rigidity of the base end side opening portion 23 of the main body casing 21 is higher than that of the rigidity. Thereby, the weight of the main body casing 21 can be reduced without complicating the shape of the main body casing 21, and the manufacture of the main body casing 21 can be advantageously performed. In other words, according to the above-described pneumatic driving tool 10, deformation of the end edge 24 of the proximal end side opening portion 23 can be prevented, and deformation of the attachment portion 26 of the top cover 25 can be prevented, and the weight of the outer casing structure 20 can be reduced. Further, the manufacture of the body casing 21 can be advantageously carried out.

Further, according to the above-described pneumatic driving tool 10, since the material of the main body casing 21 is selected from magnesium, the main body casing 21 can be molded lightly and simply. Moreover, since aluminum is selected for the material of the top cover 25, the top cover 25 can be formed lightly and simply. Here, since aluminum is a material (molding material) having a higher strength than magnesium, the rigidity of the top cover 25 can be made higher than that of the main body casing 21, and the entire top cover 25 and the main body casing 21 can be made lighter. It also seeks to simplify the molding. Therefore, according to the above-described pneumatic driving tool 10, the rigidity of the top cover 25 can be made lighter and simpler than the main body casing 21 The outer casing structure 20, in turn, can also suppress manufacturing costs by widely used materials.

Further, according to the above-described pneumatic driving tool 10, an exhaust cover 83 is provided on the outer peripheral surface 211 of the main body casing 21, and the exhaust cover 83 has a mounting portion 26 that is supported by the main body casing 21 and abuts against the top cover 25. The pressing portion 87 of the outer peripheral surface 262 extends in a manner. Therefore, even if, for example, the mounting portion 26 of the top cover 25 is deformed due to the load generated by the air pressure of the compressed air, the mounting portion 26 of the top cover 25 can be supported by the rigidity of the exhaust cover 83. Thereby, the deformation of the attachment portion 26 of the top cover 25 can be more firmly prevented, and the deformation of the end edge 24 of the proximal end side opening portion 23 can be more firmly prevented.

Further, the pneumatic driving tool of the present invention is not limited to the above-described embodiment, and may be configured as appropriate as described below.

For example, the above embodiment is an example in which a pneumatic nailing machine is described as a pneumatic driving tool of the present invention. However, the pneumatic driving tool of the present invention is not limited thereto, and may be configured as a pneumatic driving tool that uses compressed air as a driving source and that is driven into a terminal stud or a filler as a driving member.

Further, in the above embodiment, the molding material having a higher strength than the molding material of the main body casing 21 is selected for the molding material of the top cover 25, so that the rigidity of the mounting portion 26 of the top cover 25 is greater than that of the main body casing 21. The rigidity of the base end side opening portion 23 is high. However, the rigidity of the mounting portion of the top cover of the present invention is higher than the rigidity of the opening of the main body casing into the proximal end side opening, and is not limited thereto, and an appropriate rib shape may be provided.

Further, the air pressure of the compressed air used as the driving source of the pneumatic driving tool 10 of the above-described embodiment can be used at a normal pressure (about 8 kg/cm ² ) for high pressure (about 23 kg/cm). ² ) Any of the degree users.

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‧‧‧Promoter

37‧‧‧When board components

40‧‧‧ valve construction

41‧‧‧Travel valve (main valve)

42‧‧‧ valve body

43‧‧‧ Body Department

44‧‧‧Energy spring

47‧‧‧District walls

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‧‧‧Contact head

65‧‧‧ insertion path

70‧‧‧Hands

71‧‧‧Accumulation room

72‧‧‧Hose connector

73‧‧‧trigger valve

75‧‧‧匣 box

76‧‧‧Connecting Department

77‧‧‧ hook

80‧‧‧Exhaust structure

81‧‧‧Exhaust filter

82‧‧‧fasteners

83‧‧‧Exhaust cover (cover)

84‧‧‧External blowout

84a~84f‧‧‧External blowout

86‧‧‧ leg parts

87‧‧‧ Pressing parts

90‧‧‧Protection

91‧‧‧Design Department

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‧‧‧ Coverage outside the perimeter

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

471‧‧‧Surface slip surface

472‧‧‧Connected holes

731‧‧‧trigger valve body

732‧‧‧Operation trigger

821‧‧‧screw components

822‧‧‧Washers

831‧‧‧External surface of the exhaust cover

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 a bisected section.

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

Fig. 5 is a cross-sectional view showing the internal structure of the tool body that has been driven into the second operational state.

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

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

Figure 8 is a partial cross-sectional view showing the structure of the exhaust port.

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

10‧‧‧Pneumatic driving tool

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

40‧‧‧ valve construction

41‧‧‧Travel valve (main valve)

42‧‧‧ valve body

44‧‧‧Energy spring

47‧‧‧District walls

55‧‧‧Exhaust room

80‧‧‧Exhaust structure

81‧‧‧Exhaust filter

82‧‧‧fasteners

83‧‧‧Exhaust cover (cover)

86‧‧‧ leg parts

87‧‧‧ Pressing parts

90‧‧‧Protection

92‧‧‧Clip into the clamping part

93‧‧‧dike

94‧‧‧ positioning convex

95‧‧‧ protruding buffer

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

221‧‧‧ outside the joint

251‧‧‧ Coverage outside the perimeter

261‧‧‧The inner circumference of the installation site

262‧‧‧ outside the installation site

821‧‧‧screw components

822‧‧‧Washers

831‧‧‧External surface of the exhaust cover

851‧‧‧ fastening holes

852‧‧‧ protruding holes (through holes)

951‧‧‧ peripheral end

Claims (16)

A pneumatic driving tool characterized in that it is driven into a driving member by using compressed air as a driving source, and is provided with a pushing member for driving the driving member in the tool body that generates the driving force for driving. a piston that causes the pusher to perform a driving action; and a main valve that performs a driving action of the piston to perform a flow of compressed air flowing into the upper chamber of the piston; the main valve is configured to Opening the valve in the direction of the driving direction, and opening the valve in the manner of conveying the compressed air to the upper chamber of the piston, and setting the side of the side surface of the body casing of the tool body along the side of the driving direction of the driving member An exhaust port structure in which excess air existing inside the tool body after being driven is discharged to the outside of the tool body. The pneumatic driving tool of claim 1, wherein the exhaust port structure includes a cover disposed on an outer circumference of the main body casing and forming an outer air outlet for discharging the excess air, wherein the cover system is partially elastic A protective body that is externally mounted on the body casing is mounted on the outer periphery of the body casing. The pneumatic driving tool of claim 2, wherein the protective body is a molded member of an elastic material, and the cover system is secured to the body by elastic deformation of a part of the protective body interposed between the cover body and the main body casing. The adhesion between the outer casings. The pneumatic driving tool according to claim 2 or 3, wherein the protective body has a shape protruding more outward than a peripheral surface of the cover. The pneumatic driving tool of claim 4, wherein the cover body is provided with a through hole through which the protective body that is inserted between the body and the main body casing is exposed to the outside, and is inserted into the main body casing and the above The protective system between the covers is formed to protrude outward from the outer peripheral surface of the cover by the through holes. The pneumatic driving tool of claim 5, wherein the external air outlets are arranged in a plurality of directions in a direction crossing the driving direction of the driving members. The pneumatic driving tool of claim 6, wherein the outer blowing outlets are arranged in a plurality of rows along the driving direction of the driving member, and the blowing direction of the outer blowing outlet for discharging the excess air is set to be inclined Along the direction of the driving direction of the driving member. The pneumatic driving tool of claim 7, wherein the return air that returns the piston to the initial position after the piston is driven is set as the compressed air that will flow into the upper chamber of the piston for the driving action of the piston. Reuse. The pneumatic driving tool of claim 1, wherein the outer casing structure of the tool body is configured to have a body casing having a cylinder structure that generates driving force, and a top cover that is mounted to the body casing. a base end side opening portion; and the mounting portion of the top cover relative to the driving base end side opening portion of the main body housing is such that the driving base end side of the main body housing is open The edge of the portion is disposed on the inner peripheral side of the mounting portion of the top cover, and the rigidity of the mounting portion of the top cover has a rigidity higher than that of the opening of the base end of the main body casing. The pneumatic driving tool of claim 9, wherein the rigidity of the mounting portion of the top cover is obtained by selecting a molding material having a higher strength than a molding material of the main body casing of the molding material of the top cover. The rigidity of the rigidity of the base end side opening portion of the main body casing is high. A pneumatic driving tool according to claim 10, wherein magnesium is selected from said molding material of said body casing, and aluminum is selected from said molding material of said top cover. The pneumatic driving tool according to any one of claims 9 to 11, wherein an outer circumference of the main body casing is provided to extend in a manner of being supported by the main body casing and abutting against a peripheral surface of the mounting portion of the top cover The cover. A pneumatic driving tool characterized in that it is driven into a driving member by using compressed air as a driving source, and the outer casing structure of the tool body is configured to have a main body casing with a built-in cylinder that generates driving force. And a top cover that is mounted on the opening end side opening portion of the main body casing; and the mounting portion of the top cover relative to the driving base end side opening portion of the main body casing is such that the body casing is The edge of the base end side opening portion is disposed on the inner peripheral side of the mounting portion of the top cover, and is set. The rigidity of the mounting portion of the top cover is higher than the rigidity of the opening of the base end of the main body casing. The pneumatic driving tool of claim 13, wherein the rigidity of the mounting portion of the top cover is greater than a molding material having a higher strength than a molding material of the main body casing by selecting a molding material of the top cover The rigidity of the rigidity of the base end side opening portion of the main body casing is high. A pneumatic driving tool according to claim 14, wherein magnesium is selected from said molding material of said body casing, and aluminum is selected from said molding material of said top cover. The pneumatic driving tool according to any one of claims 13 to 15, wherein an outer circumference of the main body casing is provided to extend in a manner of being supported by the main body casing and abutting against a peripheral surface of the mounting portion of the top cover The cover.