JP2551305Y2 - Silencer - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a muffler for reducing the noise of compressed air exhausted from pneumatic devices such as solenoid valves and cylinders.

[0002]

2. Description of the Related Art Conventionally, this type of silencer has a structure as shown in FIG. 4 and is provided with a cylinder at the tip of a silencer body 18 which is screwed to a discharge portion S for discharging compressed air of a pneumatic device V. A protective member 19 is provided, and a single cylindrical muffling member 20 is inserted into the protective member 19, and an opening is closed at the tip of the opening. The member 19 and the muffler main body 18 are integrally connected by a single fastening member 22. The compressed air discharged from the pneumatic device V flowing through the circulation hole 23 penetrating into the muffler main body 18 collides with the inner peripheral surface of the muffling member 20 to flow through the inside, thereby reducing the flow velocity and protecting the muffler 20. By discharging the compressed air to the atmosphere through the plurality of small holes 24 provided in the member 19, the sound of discharging the compressed air is reduced.

[0003]

However, in such a configuration, the silencing member is provided by sintering and molding resin materials having different sizes and shapes with fine granularity. However, since the supply speed varies depending on the size and shape of the grains, it is very difficult to uniformly form the sintering density over the entire length, and the longer the axial dimension of the silencing member, the greater the sintering density between both ends. On the contrary, there is a problem that it is difficult to obtain a good noise reduction performance. An object of the present invention is to solve such a problem, and an object of the present invention is to provide a silencer that can obtain good silencing performance over the entire length of a silencing member that is inserted into a protective member.

[0004]

According to the present invention, a silencer body connected to a pneumatic device is disposed at one end of a protective member formed in a cylindrical shape and having a plurality of small holes penetrating therethrough. A cover member is disposed at the other end of the member by closing an opening thereof, and the protection member, the muffler body, and the cover member are connected to each other by a fastening member that penetrates the cover member and is screwed to the muffler body. A plurality of cylindrical silencing members provided with sintering molding of a granular resin material and provided with compressed air so that they can be freely ventilated are joined to each other in the axial direction, and the entire length of the plurality of silencing members is protected. The length is the same as or longer than the total length of.

[0005]

According to the structure of the present invention, a plurality of silencing members are axially joined to each other and inserted into the protection member.
Since the total length of the plurality of muffling members is equal to or longer than the entire length of the protection member, and each muffling member is fixedly arranged inside the protection member by a lid member arranged at the other end of the protection member, the shaft of each muffling member is The length in the direction can be shortened, so that the sintered density can be easily formed uniformly over the entire length, and a good noise reduction performance can be obtained over the entire length of the plurality of noise reduction members, so that the exhaust noise of the compressed air can be reduced extremely low. .

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a silencer main body, which is provided with a screw 2 on the outer periphery of a protruding portion formed at one end so as to be freely screwed into a discharge hole S of the pneumatic device V, and a mounting leg 3 protrudes at the other end. A communication hole 4 is provided so as to communicate both ends. The mounting leg 3 of the silencer main body 1 is provided with a screw hole 5 at the center of its tip. Reference numeral 6 denotes a protection member, which is provided with a plurality of small holes 7 arranged in a zigzag pattern in a cylindrical shape and is joined to the other end surface of the muffler body 1 from which the mounting leg 3 protrudes. Reference numerals 8A, 8B, and 8C denote silence members, which are formed by sintering fine granular resin materials having different sizes and shapes into a cylindrical shape, and contacting three inside the protective member 6 in the axial direction. The protective member 6 is fitted so that its entire length is the same as the entire length of the protection member 6. Reference numeral 9 denotes a cover member, which is provided so as to be in contact with the distal end of the protection member 6 so as to close the opening thereof, and has a mounting hole 10 formed in the center. Reference numeral 11 denotes a fastening member which is inserted through the mounting hole 10 of the lid member 9 and screwed into the screw hole 5 provided on the mounting leg 3 of the muffler main body 1 to form the muffler main body 1 and the muffling members 8A, 8B, 8C. The protection member 6 is provided so as to be integrally connected thereto.

Next, the operation of the above configuration will be described. The compressed air discharged from the discharge hole S of the pneumatic device V to the circulation hole 4 of the silencer main body 1 flows around the mounting leg 3 and flows through the muffling member 8.
A, 8B, and 8C, and flows in the axial direction.
Members 8A, 8B, 8
C and pass through the plurality of small holes 7 of the protection member 6 and are discharged to the atmosphere.
In this operation, when the compressed air passes through the silencing members 8A, 8B, 8C, the compressed air collides with the inner peripheral surfaces of the silencing members 8A, 8B, 8C, and the flow velocity is reduced when flowing through the inside. The noise of the compressed air exhausted to the atmosphere through the small holes 7 of the protection member 8 is reduced to a very low level.

[0008] Further, the silencing member 8A fitted and inserted into the protective member 6,
Since 8B and 8C are arranged by joining a plurality of members each having a shorter overall length in the axial direction, each of the noise reduction members 8A, 8B and 8C can easily form a sintered density uniformly over the entire length, and a plurality of noise reduction members can be formed. Good silencing performance is obtained over the entire length of the members 8A, 8B, 8C, and a silencer having an optimal size and silencing performance according to the application can be easily provided.

FIGS. 2 and 3 show another embodiment of the present invention, in which the same members as those in the first embodiment are denoted by the same reference numerals, and only different structures will be described. Two noise reduction members 8A in the protection member 12,
8B, and the total length of the two silencing members 8A and 8B is slightly longer than the total length of the protection member 12 so as to form a gap H. Then, the cover member 9, the two muffling members 8 </ b> A and 8 </ b> B, and the muffler main body 1 are integrally connected by fastening the fastening member 13 to the screw hole 5 of the muffler main body 1. At this time, the protection member 12 is connected to the flange 14 of the silencer body 1.
The flange 15 of the lid member 9 prevents movement in the radial direction, and is provided integrally with the noise reduction members 8A and 8B.

With this configuration, the compressed air discharged from the pneumatic device to the circulation hole 4 of the silencer main body 1 flows through the inner surfaces of the silencers 8A and 8B, passes through the protective member 12, and is discharged to the atmosphere. The same operation as the embodiment can be obtained. Since the total length of the two noise reduction members 8A and 8B is longer than the total length of the protection member 12, the two noise reduction members 8A and 8B are provided.
B is firmly joined to prevent damage caused by being disposed in the protective member 12 satisfactorily with respect to vibration caused when the compressed air is discharged, and compressed air from the joint between the silencing members 8A and 8B. Concentrated discharge can be prevented, and better silencing performance can be obtained.

[0011]

As described above, according to the present invention, the silencer main body connected to the pneumatic device is arranged at one end of the protection member having a cylindrical shape and having a plurality of small holes penetrating therethrough. The other end of the cover member is closed by closing its opening, and the protection member, the muffler body, and the cover member are connected to each other by a fastening member that penetrates the cover member and is screwed to the muffler body. Inside, a plurality of cylindrical silencing members provided by sintering and molding a granular resin material to allow compressed air to flow therethrough are joined and fitted in the axial direction, and the entire length of the plurality of silencing members is used as a protective member. By providing the same or longer than the entire length, good silencing performance can be obtained over the entire length of the plurality of silencing members to be inserted into the protective member, and an optimal silencer according to the application can be easily provided. be able to. In addition, since the total length of the plurality of muffling members is equal to or longer than the entire length of the holding member, the contact between the muffling members is firmly obtained, and the concentrated air is discharged from the joint. Can be prevented,
Each silencing member has a practically excellent effect of preventing damage caused by vibration caused during discharge.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a muffler showing one embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of a muffler showing another embodiment of the present invention.

FIG. 3 is an enlarged sectional view of a main part A shown in FIG. 2;

FIG. 4 is a longitudinal sectional view showing a conventional technique.

[Explanation of symbols]

 1, 18 silencer body 6, 12, 19 protective member 7, 24 small hole 8A, 8B, 8C, 20 silencer 9, 21, lid member 11, 23 fastening member V pneumatic device

Claims (1)

(57) [Scope of request for utility model registration] 1. A silencer main body connected to a pneumatic device is disposed at one end of a protective member formed in a cylindrical shape and having a plurality of small holes penetrating therethrough, and the opening is closed at the other end of the protective member. The protective member, the silencer body, and the lid member are connected by a fastening member that penetrates the lid member and is screwed to the silencer main body, and a granular resin material is burned inside the protective member. A plurality of cylindrical silencing members that are formed by molding and provided with compressed air so that they can be freely ventilated are fitted and inserted in the axial direction together, and the total length of the plurality of silencing members is the same or longer than the entire length of the protective member. Become a silencer.