JPH0796476A - Muffling cover for crusher - Google Patents

Abstract

PURPOSE:To provide a muffling cover for a crusher where the striking noise of a striking chisel of an exciting part, especially the striking noise propagating downward is effectively reduced. CONSTITUTION:A muffling cover is used in a crusher 1 provided with a striking chisel 3 which is vibrated in the axial direction by the striking of an exciting part 2, and consists of a body covering part 12 to be covered on the striking chisel 3 at least from the exciting part 2, and a lower end sliding part 13 to be brought into slidable contact with the circumferential surface of the striking chisel 3 at the lower end of the body covering part 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a muffler cover used in a crusher for crushing concrete or the like.

[0002]

2. Description of the Related Art As a muffling cover used in a pneumatic or other type of shredder having only a blow that is vibrated in the axial direction by the strike of a vibrating section, one that covers only the strike from the vibrating section It is known that there is a sheet using a lead-containing sheet, and a sheet having a sound-deadening effect by using a sponge inside is also used.

However, in the above-mentioned conventional sound deadening cover, since the sound of hitting only by the vibrating portion easily leaks downward from the gap between the lower end of the sound deadening cover and the vibrating hitting,
There was a limit to the sound deadening effect, and it was still difficult for an operator to use the crusher safely and under low noise.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide a silencing cover for a crusher that effectively reduces the impact sound, particularly downward impact sound, caused only by impact by the vibrating section.

[0005]

The sound-deadening cover for a crusher according to the present invention is used for a crusher having only a striking member that is axially vibrated by a striking member of a vibrating section.
It is characterized in that at least the main body covering portion is covered from the vibrating portion to the upper portion only on the impact, and the lower end sliding contact portion is slidably contacted with the peripheral surface only on the impact at the lower end of the main body covering portion.

[0006]

[Function] At least the impact from the vibrating section toward the periphery in the upper part only on the impact and noise due to air injection in the case of pneumatic type and the impact sound of the impact only by the vibrating section on the main body cover of the muffling cover. The impact sound of only the impact by the vibrating portion which is reduced and is directed downward is blocked by the lower end sliding contact portion of the muffling cover under the sliding contact with only the impact.

In order to sufficiently reduce the above-mentioned noise and impact sound in the lateral direction, the main body coating portion has a lead-containing outer sheet,
A lead-containing inner sheet having a large number of holes formed therein, and a first sponge body interposed between the outer sheet and the inner sheet,
You may employ | adopt what consists of a 2nd sponge body provided in the inner surface of an inner sheet. In this case, the noise and the impact sound are refracted and dispersed while reaching the inner surface of the first sponge body through a large number of holes of the second sponge body and the inner sheet, and are greatly reduced until reaching the outer sheet. To be Since the inner sheet and the outer sheet contain lead, they are also useful for reducing vibration.

For the lower end sliding contact portion, for example, one made of a rubber-made cylindrical body having abrasion resistance may be used in order to effectively absorb vibration and noise.

[0009]

1 is a sectional view of a muffler cover for a crusher according to an embodiment of the present invention. In the figure, the crusher 1 is provided with only a hammer 3 that is vibrated in the axial direction by the hammering of a vibrating section 2 composed of an air piston, and a compressed air supply port 5 leading to the vibrating section 2 is provided at one end of a handle 4. In addition to being provided, an operation switch 6 for operating the vibrating section 2 is provided at the other end.

The sound deadening cover 11 is a cylindrical main body covering portion 12.
The main body covering portion 12 is provided with a first sponge body 17 on the inside between the lead-containing outer sheet 14 and the lead-containing inner sheet 16 in which a large number of holes 15 are formed. A second sponge body 18 is provided on the inner surface of the inner sheet 16 together with
And the lower end sliding contact portion 13 is composed of a rubber-made tubular body 19 having abrasion resistance.

The main body covering portion 12 is continuously covered from above the vibrating portion 2 to the upper portion 3 of the striking portion 3 and is engaged with the handle 4 or the like with a band or the like (not shown), and the lower end sliding contact portion 1 is provided.
Only the hitting 3 is slidably inserted into the cylindrical body 19 of 3.

[0012]

EFFECTS OF THE INVENTION Since the muffler cover of the present invention is configured as described above, it is possible to effectively reduce only the impact sound of the vibrating section, particularly the impact sound directed downward.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a muffler cover for a crusher according to an embodiment of the present invention.

[Explanation of symbols]

 1 Crusher 2 Vibration part 3 Impact only 12 Body cover part 13 Lower end sliding contact part

Claims (3)

[Claims] 1. A main body coating part, which is used for a crusher equipped only with a percussion that is vibrated in the axial direction by the percussion of a vibrating part, and a main body covering part in which only the percussion part from the vibrating part is covered with an upper part, and a main body coating. A silencer cover for a crusher, which comprises a lower end sliding contact portion which is slidably contacted with a peripheral surface at a lower end of the portion. 2. The main body coating portion comprises a lead-containing outer sheet, a lead-containing inner sheet having a large number of holes, and a first sponge body interposed between the outer sheet and the inner sheet. The muffler cover for a crusher according to claim 1, comprising a second sponge body provided on the inner surface of the inner sheet. 3. The sound deadening cover for a crusher according to claim 1, wherein the sliding contact portion at the lower end is made of a rubber tubular body.