JP2586848Y2 - Pneumatic tool silencing attachment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a noise reduction device for reducing exhaust noise and driving noise generated by a pneumatic tool.

[0002]

2. Description of the Related Art A pneumatic tool that performs mechanical work as a tool by using the energy of compressed air is more portable than a hydraulic tool. Is often used in In these cases, the compressed air used as an energy source is configured to be discharged into the atmosphere directly from an exhaust port provided in the pneumatic tool after use.

[0003]

[Problems to be Solved by the Invention] However, for example, when performing operations such as riveting and hammering with a pneumatic tool, large noises such as exhaust sound and drive sound leak out from the exhaust port of the pneumatic tool, and it is noisy. Further, the lubricating oil in the pneumatic tool may be mixed with the exhaust gas to be scattered and scattered, thereby causing a problem that the workability is not good. The present invention has been made in view of such a problem, and by installing the silencer in a state of covering the exhaust port of the pneumatic tool, noise can be reduced and lubricating oil can be prevented from scattering. It aims to provide a silencing attachment for pneumatic tools.

[0004]

According to the present invention, a pneumatic tool for performing mechanical work using the energy of compressed air and discharging the used compressed air from an exhaust port is provided. as means for achieving the object, the exhaust
With the exhaust gas exhausted from the vent being sealed,
Attached part to cover the mouth part and silence inside
The silencer filled with the member and the
It has a separate channel at the crotch, and a silencer is provided at the end of this channel.
And a connecting portion which can be detachably attached.
The silence is applied to both or only one of the split ends
The front of one side where this silencer cannot be attached
Pneumatic pressure characterized by being able to close the tip
It is a silence attachment for the tool .

[0005]

[Operation] The silencing attachment according to the present invention is attached to the exhaust port of a pneumatic tool such as a pneumatic hammer so as to cover the exhaust port while maintaining a sealing state so that the exhaust does not leak outside. As a result, the exhaust gas discharged from the exhaust port is guided to the silencer, and the noise is reduced by the silencer filled in the silencer, and the noise is emitted to the outside.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an external perspective view showing a state in which a part of a silencing attachment according to the present invention is cut away, and FIG. 2 is a cross-sectional view showing a state in which the silencing attachment is attached to a pneumatic hammer known as a pneumatic tool. . In FIG. 2, reference numeral 1 denotes a pneumatic hammer, which has a piston 3 in a cylinder 2 and locks a compressed air supplied intermittently from trachea 4, 4,. The tool 5 is vibrated by continuously projecting and retreating the piston 3 forward by the elastic force of the coil spring 6 to make it possible to hammer a work (not shown) abutted on the tool 5. is there. Such a pneumatic hammer 1
The trachea 4, 4,...
A plurality of outlets 7, 7,... For discharging used compressed air to the outside, which are directly in communication with the air, are formed. In such a pneumatic hammer, noise such as the exhaust sound of the compressed air and the striking sound of the piston 3 leaks from the exhaust ports 7, 7,. 7. It has a structure that makes it easier to scatter.

Reference numeral 8 denotes a silencing attachment fitted from the front of the pneumatic hammer 1 so as to cover the exhaust ports 7, 7,... On the outer periphery of the cylinder 2 of the pneumatic hammer 1. It is made of a steel material having a cylindrical shape, and includes a fitting portion 9 as the mounting portion, a connecting portion 10, and a muffling portion 11. FIG. 1 is an external perspective view of the sound deadening attachment 8 with the sound deadening portion 11 removed and a part thereof cut away. In the figure, a plurality of concave grooves 12 to 15 are formed on the inner peripheral surface of the sound deadening attachment 8, and rubber O-rings 16 to 19 are embedded in each of the concave grooves 12 to 15, As shown in FIG. 2, when the silencing attachment 8 is fitted to the pneumatic hammer 1 and mounted, the O-ring 1
6 to 19 are in close contact with the outer peripheral surface of the cylinder 2 to prevent rattling when the muffling attachment 8 is mounted, and the concave portions of the fitting portion 9 provided between the front and rear O-rings 16, 17 and 18, 19. Space 21 formed by 20
Is maintained. 22
FIG. 1 shows a plurality of nut holes formed at the rear end of the fitting portion 9.
By screwing a bolt (not shown) until it reaches the outer peripheral surface of the cylinder 2, the muffling attachment 8 can be fixed to the pneumatic hammer 1.

Reference numeral 10 denotes a hollow connecting portion for connecting the fitting portion 9 and the muffling portion 11. The connecting portion 10 is branched in two directions in the middle of the pipeline. Inner walls 23 and 24 of the branched tip are tapered. And, in this part, the silencer 1 shown in FIG.
1 is screwed in and attached. In this case, the silencer 11 may be attached to both the inner walls 23 and 24 of the branched tip, or the silencer 11 may be attached to only one of the inner walls 23 and the other may be closed. The silencer 11 has a number of small holes 11a, 11a,.
Is filled with a cotton-like body 11c made of glass fiber in this embodiment as a sound deadening member. Then, the used compressed air discharged from the exhaust ports 7, 7,... Of the pneumatic hammer 1 is introduced into the muffling section 11 through the connecting section 10, thereby reducing noise and scattering lubricating oil. This is to prevent it.

The sound deadening attachment 8 of the present invention is configured as described above. When using the sound deadening attachment 8, first, the tool 5 is removed from the pneumatic hammer 1 and the sound deadening attachment 8 is removed from this part. The fitting portion 9 is fitted into the pneumatic hammer 1 and the O-ring 1 of the fitting portion 9 is fitted.
The silencing attachment 8 is positioned so that the exhaust ports 7, 7,... Of the pneumatic hammer 1 are located between 6, 17 and 18, 19. At this position, a bolt (not shown) is screwed strongly from the nut hole 22 formed in the fitting portion 9 of the silencing attachment 8 toward the outer peripheral surface of the cylinder 2 of the pneumatic hammer 1 so that the silencing attachment 8 is Fixed to 1. Thereby, the pneumatic hammer 1
Are in a state of being sealed between the O-rings 16 to 19 of the sound deadening attachment 8. When the pneumatic hammer 1 is driven in this state, the exhaust ports 7, 7,.
The used compressed air that has been discharged from the sealed space 21 passes through the connecting portion 10 and is introduced into the sound deadening portion 11, where the sound deadening member 11 is filled with a cotton-like glass fiber as a sound deadening member. The noise is reduced by the body 11c, and the small holes 11a,
11a is released outside. Further, since the lubricating oil in the cylinder 2 of the pneumatic hammer 1 is also trapped by the glass fiber flocculent 11c through the above-described process, the lubricating oil does not scatter outside as in the related art.

[0010]

As described above, according to the present invention, the exhaust port of the pneumatic tool is covered in a sealing state so that the exhaust does not leak to the outside, and the exhaust discharged from the exhaust port is provided with a muffling member. Since it is made to discharge through the silencer having, it is possible to significantly reduce noise such as exhaust noise and driving noise leaking from the exhaust port generated from the pneumatic tool,
A silencing attachment that can prevent scattering of lubricating oil discharged to the outside with exhaust can be realized. This makes it possible to improve workability when using a pneumatic tool.

[Brief description of the drawings]

FIG. 1 is an external perspective view showing a state in which a part of a silencing attachment according to the present invention is cut away.

FIG. 2 is a cross-sectional view showing a state in which the silencing attachment according to the present invention is attached to a pneumatic hammer known as a pneumatic tool.

[Explanation of symbols]

 1. Pneumatic hammer 20 Depressed part 2. Cylinder 21 Space 3. Piston 22 Nut hole 4. Trachea 7. Exhaust port 8. Silent attachment 9. Fitting part 10. Connection part 11. -Silencer 11a-Small hole 11b-Housing 11c-Cotton-like body of glass fiber 12-15-Concave groove 16-19-O-ring

Claims (1)

(57) [Scope of request for utility model registration] 1. A pneumatic tool for performing mechanical work utilizing the energy of compressed air and discharging the used compressed air from an exhaust port, wherein the exhaust gas discharged from the exhaust port is sealed ,
A mounting portion mounted to cover the exhaust port portion,
A silencer filled with a silencer, and a passage through the outlet.
With a forked bifurcated conduit inside, and silenced at the end of this conduit
The part consists of a connection part that can be detachably attached,
Both or only one end of the bifurcated tip
Attach the sound deadening section,
A silencing attachment for a pneumatic tool, wherein the end of the pneumatic tool can be closed.