JP5994566B2 - Pneumatic tool - Google Patents

Description

  The present invention relates to a pneumatic tool provided with an air duster.

  2. Description of the Related Art Conventionally, pneumatic tools such as nailing machines and screw driving machines that use compressed air as a drive source are known that include an air duster that blows air and blows off wood chips and the like. According to the pneumatic tool provided with such an air duster, it is not necessary to change the nail driver and the air duster one by one, so that workability can be improved.

  Also, as in the invention described in Patent Document 1, if the air duster pipe is provided along the magazine and the air duster outlet is opened near the nose portion, the air duster can be used in the same posture as the nail driving, Furthermore, workability and operability can be improved.

JP 2008-296354 A

  By the way, in the pneumatic tool as described above, the tool body and the magazine are usually formed of different members having different materials and strengths. For this reason, when an external force is applied to the pneumatic tool by dropping or the like, the deformation amount of the tool body and the magazine are different. For this reason, when a metal air duster pipe is provided across the tool body and the magazine as in the invention described in Patent Document 1, a load in the shearing direction acts on the air duster pipe in the straddled portion, and depending on the case, the air duster The pipe may be damaged.

  Therefore, according to the present invention, an air duster pipe is provided along the magazine, and the air duster pipe is opened near the nose to improve workability and operability, and the air duster pipe is broken even when an external force is applied to the tool. It is an object to provide a pneumatic tool that is difficult to perform.

  The present invention has been made to solve the above-described problems, and is characterized by the following.

(Claim 1)
The invention described in claim 1 is characterized by the following points.

That is, the pneumatic tool according to claim 1 is disposed along the magazine, a tool body provided with a nose portion into which a fastener is driven, a magazine provided on a side of the tool body, and the magazine. An air duster pipe having an outlet opening near the nose portion, the air duster pipe being fixed to the magazine side, a second air duster pipe being fixed to the nose portion side, At least a flexible pipe provided between the first air duster pipe and the second air duster pipe, and a connecting portion between the first air duster pipe and the flexible pipe is tightened from the outside by the magazine. The connecting portion between the second air duster pipe and the flexible pipe is The cover member for fixing the second air duster pipe to the nose portion, characterized in that it is held from the outside.

(Claim 2)
The invention described in claim 2 has the following features in addition to the features of the invention described in claim 1 described above.

  That is, the pneumatic tool is provided with a fixing portion for holding and fixing the flexible pipe, and the flexible pipe is disposed so as to be able to bend in a portion other than the fixing portion.

(Claim 3)
The invention described in claim 3 is characterized by the following points in addition to the characteristics of the invention described in claim 2 described above.

  That is, the fixing portion includes an abutting portion for abutting an end portion of the flexible pipe on the outlet side.

  The invention according to claim 1 is as described above, and the air duster pipe includes a first air duster pipe fixed to the magazine side, a second air duster pipe fixed to the nose part side, and a first air duster pipe. And a flexible pipe provided between the second air duster pipe. For this reason, even when an external force is applied to the tool due to dropping or the like, the deformation difference between the tool main body and the magazine can be absorbed by the flexible pipe, so that the air duster pipe can be prevented from being damaged.

  Further, since the dimensional difference can be absorbed by the flexible pipe even if the dimensional accuracy is poor, the first air duster pipe and the second air duster pipe are not subjected to an excessive load in addition to being easily assembled.

  Moreover, invention of Claim 2 is as above-mentioned, and is provided with the fixing | fixed part for hold | maintaining and fixing a flexible pipe. For this reason, it is possible to prevent the flexible pipe from being detached by the fixing portion, and it is possible to prevent the flexible pipe from fluttering.

  Further, since the flexible pipe is arranged so as to be able to bend, the dimensional difference can be absorbed by bending the flexible pipe, and the assembling property can be improved. Further, the load on the first air duster pipe and the second air duster pipe can be reduced by bending the flexible pipe.

  Further, the invention according to claim 3 is as described above, and the fixing portion includes an abutting portion for abutting the end portion on the outlet side of the flexible pipe, so that the flexible pipe is bent. Even so, the flexible pipe can be securely fixed.

It is a right view of a nailing machine. It is a left view of a nailing machine. It is sectional drawing which looked at the nailing machine from the left side. It is an external appearance perspective view of a flexible pipe. It is a perspective view which shows a mode that the 1st air duster pipe is attached to a magazine. It is a partially expanded sectional view of the nose part vicinity. It is a perspective view which shows a mode that an air duster pipe is pinched | interposed and fixed with a magazine and an arm cover. It is the figure which looked at the arm cover from the back.

  An embodiment of the present invention will be described with reference to the drawings, taking a nail driver 10 as a pneumatic tool as an example.

  A nail driver 10 according to the present embodiment is a pneumatic nail driver that drives a nail using compressed air. As illustrated in FIG. 1, a tool main body 11 including a nose portion 13, and a nose portion 13. And a magazine 30 provided continuously to the tool body 11 on the side.

  The tool body 11 is configured by a body housing 12 and a grip housing 16 that are connected substantially at a right angle. Although not particularly shown, a striking cylinder is disposed inside the body housing 12, and a striking piston is slidably accommodated in the striking cylinder. A driver for striking a nail is connected to the lower surface of the striking piston so that the driver can drive the nail when the striking piston is actuated.

  A nose portion 13 for injecting a nail is provided at the lower end of the body housing 12, and the above-mentioned driver is slidably guided toward the nose portion 13. A nail supply mechanism is provided behind the nose portion 13, and this nail supply mechanism sequentially supplies the nails in the magazine 30 into the nose portion 13 as the nails are driven. .

  A contact nose 14 is disposed at the tip of the nose portion 13 so as to be movable up and down with respect to the nose portion 13 and pressed against the workpiece. The contact nose 14 is slidably attached to the tip of the nose portion 13 and is slidable along the nail injection direction. The contact nose 14 is connected to a contact arm that constitutes a safety device of the nailing machine 10, and when the contact nose 14 is pressed against and slides against the material to be driven, the contact arm integrally moves up. It has become. When the contact arm is moved upward, the compressed air can be supplied into the striking cylinder by the operation of the trigger 17 (punching of the nail).

  That is, when the trigger 17 is operated with the contact nose 14 pressed against the workpiece (or when the contact nose 14 is pressed against the workpiece with the trigger 17 operated), the end cap portion 29 at the rear end of the grip housing 16 is operated. Compressed air supplied from an air supply source such as an air compressor connected to the cylinder is supplied into the striking cylinder, the compressed air acts on the striking piston to drive the striking piston, and the driver coupled to the striking piston Blow. At this time, the position of the driver and the nail is stably guided by the injection path inside the contact nose 14, and the nail is driven out from the injection port 15 opened at the tip of the contact nose 14.

  As shown in FIG. 1, a duster button 28 is provided in the vicinity of the trigger 17. The duster button 28 is disposed at a position where it can be operated with the thumb of the right hand while gripping the grip housing 16 with the right hand, and can be operated without changing the nailer 10. When the duster button 28 is pressed, the air duster is activated.

  As shown in FIG. 2, the air duster ejects air from a blowout port 40a of an air duster pipe 40 that opens in the vicinity of the nose portion 13 in the nail ejection direction, and blows away wood chips and the like by ejecting air. It comes to let you.

  The ejection of air from the outlet 40 a is executed by supplying compressed air from an air supply source such as an air compressor connected to the end cap portion 29. Although not particularly illustrated, a switching valve is provided inside the end cap portion 29 so that whether the compressed air is supplied to the striking cylinder side or the air duster pipe 40 side can be switched by this switching valve. It has become.

  The switching valve normally supplies compressed air to the striking cylinder side. The compressed air supplied to the striking cylinder is supplied and stored in an air chamber formed inside the grip housing 16. The stored compressed air enters the striking cylinder when the trigger 17 is operated, and drives the driver shockingly.

  On the other hand, when the duster button 28 described above is pressed, the switching valve switches to supply compressed air to the air duster pipe 40 side. For this reason, when the duster button 28 is pressed, the compressed air is blown out from the outlet 40a of the air duster pipe 40.

  Here, as shown in FIG. 3, the air duster pipe 40 according to this embodiment includes a first air duster pipe 41 fixed to the magazine 30 side, and a second air duster pipe 42 fixed to the nose portion 13 side. The first air duster pipe 41 and the second air duster pipe 42 are connected to each other, and a flexible pipe 43 that connects the three pipes.

  The first air duster pipe 41 is a metal pipe disposed on the upstream side of the air duster pipe 40, and is disposed along the magazine 30. The first air duster pipe 41 is substantially L-shaped as shown in FIG. 4 and includes a substantially straight upstream straight portion 41a and a downstream straight portion 41c on both sides of a substantially right-angled refracting portion 41b. An upstream end portion 41 d that is an end portion of the upstream linear portion 41 a is connected to the switching valve at the end cap portion 29. A downstream end 41 e that is an end of the downstream straight portion 41 c is connected to the flexible pipe 43.

  As shown in FIG. 5, the first air duster pipe 41 passes through two through holes (an upstream through hole 31 b and a downstream through hole 31 c) provided near the bottom of the magazine 30. It is attached, and the downstream straight portion 41 c passes through the inside of the magazine 30. Then, after the downstream straight portion 41c is passed through the magazine 30, the downstream straight portion 41c is rotated around the shaft, and the upstream straight portion 41a is fitted into the pipe holding groove 31a on the side of the magazine 30 to be fixed to the magazine 30. Yes.

  In addition, a flexible pipe 43 is externally fitted to the end (downstream end 41 e) of the first air duster pipe 41 on the outlet 40 a side, and a connecting portion between the first air duster pipe 41 and the flexible pipe 43. However, as shown in FIG. 6, they are arranged so as to overlap the positions of the downstream through holes 31 c formed in the side walls of the magazine 30. For this reason, since the flexible pipe 43 externally fitted to the first air duster pipe 41 is fitted into the downstream through hole 31c, the first air duster pipe 41 and the flexible pipe 43 are connected by the downstream through hole 31c. A part is hold | maintained so that it may be tightened from the outside, and a connection part can be fixed now.

  The second air duster pipe 42 is a metal pipe disposed on the downstream side of the air duster pipe 40, and is fixed between the magazine 30 and the arm cover 20 and in the vicinity of the nose portion 13. The second air duster pipe 42 is substantially L-shaped as shown in FIG. 4, and includes a substantially straight upstream straight portion 42a and a downstream straight portion 42c on both sides of a substantially right-angled refracting portion 42b. An upstream end portion 42 d that is an end portion of the upstream linear portion 42 a is connected to the flexible pipe 43. Further, the downstream end portion 42e, which is the end portion of the downstream straight portion 42c, opens toward the outside in the vicinity of the nose portion 13 and constitutes a blowing port 40a of the air duster pipe 40.

  As described above, the flexible pipe 43 is fitted on the upstream end portion 42d of the second air duster pipe 42. The connecting portion between the flexible pipe 43 and the second air duster pipe 42 is shown in FIGS. As shown in FIG. 3, the pipe support portion 31d extending in front of the magazine 30 and the arm cover 20 are sandwiched and held.

  As shown in FIG. 7, the pipe support portion 31 d is a portion that is integrally extended to the front end of the magazine 30 so that the arm cover 20 can be fixed. The pipe support portion 31d is provided along the arrangement direction of the air duster pipe 40 so as to support the air duster pipe 40 protruding from the downstream through hole 31c outside the downstream through hole 31c.

  As shown in FIGS. 6 to 8, the arm cover 20 is a member disposed so as to cover the outside of the second air duster pipe 42, and a support groove for fitting the second air duster pipe 42 on the inside. 21 is formed. The support groove 21 together with the pipe support portion 31d forms a fixing portion for holding and fixing the connecting portion between the flexible pipe 43 and the second air duster pipe 42 from the outside. For this reason, it is possible to prevent the flexible pipe 43 from being detached by the fixing portion, and it is possible to prevent the flexible pipe 43 from fluttering.

  The support groove 21 is provided with a rib 22 protruding in the inner diameter direction as shown in FIGS. The rib 22 forms an abutting portion for abutting the end of the flexible pipe 43 on the outlet 40a side. By providing the rib 22, the flexible pipe 43 is formed so as not to move to the outlet 40 a side than the rib 22. For this reason, even when a force is applied to move the flexible pipe 43 to the outlet 40a side by high-pressure air when the air duster is operated, the end of the flexible pipe 43 on the outlet 40a side is applied to the rib 22. Therefore, the flexible pipe 43 is prevented from moving by being blown by air.

  Further, the arm cover 20 is provided with a blowout port fixing portion 23 that holds and fixes the vicinity of the downstream end portion 42e of the second air duster pipe 42. The outlet fixing portion 23 has a through hole for allowing the downstream straight portion 42c of the second air duster pipe 42 to pass therethrough. By holding the downstream straight portion 42c by the through hole, the position of the outlet 40a is determined. It can be fixed.

  When the second air duster pipe 42 is attached to the arm cover 20, the downstream straight portion 42c of the second air duster pipe 42 is passed through the above-described through hole, and then the downstream straight portion 42c is rotated around the shaft, What is necessary is just to fit the linear part 42a to the support groove 21 of the arm cover 20. FIG.

  The arm cover 20 can be fixed to the pipe support portion 31d and the nose portion 13 of the magazine 30 by a predetermined fixing means (bolts or the like). The arm cover 20 to which the second air duster pipe 42 is attached is attached. By fixing with this predetermined fixing means, the second air duster pipe 42 can be fixed to the nose portion 13 side.

  By the way, both ends of the flexible pipe 43 (that is, the connecting portion with the first air duster pipe 41 and the connecting portion with the second air duster pipe 42) are fixed, but the intermediate portion is shown in FIG. As shown, it can be bent without being fixed. Specifically, a space S having a width larger than the outer diameter of the flexible pipe 43 is formed on the upstream side of the support groove 21 of the arm cover 20, and this space S is provided. The flexible pipe 43 can be bent. For this reason, by bending the flexible pipe 43 in the space S, the dimensional difference between the first air duster pipe 41 or the second air duster pipe 42 can be absorbed by the flexible pipe 43, and the assembling property can be improved. It can be done. Further, by bending this portion, the load on the first air duster pipe 41 and the second air duster pipe 42 made of metal can be reduced.

  As described above, according to the present embodiment, the air duster pipe 40 includes the first air duster pipe 41 fixed to the magazine 30 side, the second air duster pipe 42 fixed to the nose portion 13 side, And a flexible pipe 43 that connects the first air duster pipe 41 and the second air duster pipe 42. For this reason, even when an external force is applied to the tool due to dropping or the like, a difference in deformation amount between the tool body 11 and the magazine 30 can be absorbed by the flexible pipe 43, so that the air duster pipe 40 can be prevented from being damaged. .

  In addition, since the air duster pipe 40 is divided into a plurality of parts, the air duster pipe 40 can be configured by combining simple shaped pipes. Therefore, the air duster pipe 40 can be easily assembled. Specifically, since the air duster pipe 40 according to the present embodiment is formed along the magazine 30 and the nose portion 13, the air duster pipe 40 is divided into a plurality of shapes, but the air duster pipe 40 is divided into a plurality of parts. As a result, the shape of the single metal pipe is a simple L-shape, and can be assembled simply by being inserted into the through hole of the magazine 30 or the arm cover 20 and rotated.

  In other words, since the pipes divided into simple shapes are connected by the flexible pipe 43, the restriction on the pipe shape is reduced, and the degree of freedom of arrangement of the pipelines is increased. For this reason, arrangement | positioning of the blower outlet 40a to the nose part 13 vicinity becomes easy, and workability | operativity and operativity can be improved by arrange | positioning the blower outlet 40a to the nose part 13 vicinity.

  Further, even if the dimensional accuracy is poor, the dimensional difference can be absorbed by the flexible pipe 43. Therefore, in addition to easy assembly, no extra load is applied to the metal pipe.

  In the above-described embodiment, the air duster pipe 40 is divided into three. However, the embodiment of the present invention is not limited to this. The air duster pipe 40 may be further divided in consideration of ease of assembly. However, since the end portion on the air supply side receives high-pressure air, it is desirable to use a metal pipe instead of the flexible pipe 43. Moreover, since the chatter noise may be generated when the end part which comprises the blower outlet 40a is made into the flexible pipe 43, it is desirable that the edge part by the side of the blower outlet 40a is also a metal pipe.

  In addition, the air duster pipe 40 is not limited to the connected aspect, and a flexible part may be formed between the first air duster pipe 41 and the second air duster pipe 42 to integrally form the air duster pipe 40. .

10 Nailer (pneumatic tool)
DESCRIPTION OF SYMBOLS 11 Tool main body 12 Body housing 13 Nose part 14 Contact nose 15 Injection port 16 Grip housing 17 Trigger 20 Arm cover 21 Support groove (fixing part)
22 ribs
23 Outlet port fixing portion 28 Duster button 29 End cap portion 30 Magazine 31a Pipe holding groove 31b Upstream through hole 31c Downstream through hole 31d Pipe support portion 40 Air duster pipe 40a Outlet port 41 First air duster pipe 41a Upstream straight portion 41b Refraction portion 41c Downstream straight portion 41d Upstream end portion 41e Downstream end portion 42 Second air duster pipe 42a Upstream straight portion 42b Refraction portion 42c Downstream straight portion 42d Upstream end portion 42e Downstream end portion 43 Flexible pipe S Space

Claims (3)

A tool body with a nose part into which a fastener is driven,
A magazine provided on the side of the tool body;
An air duster pipe that is disposed along the magazine and has an outlet opening near the nose portion;
With
The air duster pipe includes a first air duster pipe fixed to the magazine side, a second air duster pipe fixed to the nose portion side, and a space between the first air duster pipe and the second air duster pipe. A flexible pipe provided in
The connecting portion between the first air duster pipe and the flexible pipe is held so as to be tightened from the outside by the magazine,
The connecting portion between the second air duster pipe and the flexible pipe is held from the outside by a cover member for fixing the second air duster pipe to the nose portion side . The pneumatic tool includes a fixing portion for holding and fixing the flexible pipe,
The pneumatic tool according to claim 1, wherein the flexible pipe is disposed so as to be able to bend in a portion other than the fixed portion.   The pneumatic tool according to claim 2, wherein the fixing portion includes an abutting portion for abutting an end portion of the flexible pipe on the outlet side.

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