JP3059016U - Soundproofing device for breaker - Google Patents

Abstract

(57) [Summary] [PROBLEMS] A high soundproofing effect is obtained, and the whole soundproofing device is lightened. SOLUTION: A sound insulating material made of urethane foam is filled without gaps between a breaker body and a bracket.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention provides a soundproofing device for reducing the hitting noise and vibration noise generated during use from breakers such as hydraulic breakers (including rock drills having a hitting function, rock drills such as drilling machines). It is about.

[0002]

[Prior art]

 As a conventional soundproofing device of this type, there is a soundproofing device in which a plurality of hard urethane soundproofing plates 13 are interposed between a breaker body 11 and a bracket 12 supporting the same, as shown in FIG.

[0003]

[Problems to be solved by the invention]

 In the above conventional soundproofing device, the soundproofing plate 13 cannot be arranged so as to completely fill the gap between the breaker body 11 and the bracket 12, so that a sufficient soundproofing effect cannot be obtained. is there. That is, the sound and vibration of the piston hitting the crushing rod in the breaker body 11 cannot be sufficiently blocked by the soundproof plate 13, and the weight of the soundproof device 13 made of hard urethane also increases because the soundproof plate 13 made of hard urethane is heavy. There is a problem that.

The present invention has been made in view of such a problem, and an object of the present invention is to provide a soundproofing device that can reduce noise during use of a breaker and can reduce the overall weight. is there.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, a soundproofing device for a breaker according to the present invention includes a breaker main body, a bracket for supporting the breaker body, and a soundproofing material made of urethane foam filled between the two without any gap. ing.

[0006]

[Embodiment of the invention]

 An embodiment of the invention will be described with reference to the drawings. 1 to 4, a bracket 2 is attached to a tip of an arm 1 of a power shovel, and a plurality of openings 3 for disassembly, hydraulic pipe piping, and the like are provided in a part thereof. A breaker body 4 is fixed inside the bracket 2, and a crushing rod 5 projects from the tip of the breaker body 4 through the bracket 2.

A space 6 between the breaker body 4 and the bracket 2 is filled with a soundproof material 7 without any gap. That is, the soundproofing material 7 completely fills the space between the breaker body 4 and the bracket 2. The soundproof material 7 is made of urethane foam having high oil resistance and heat resistance, and is lightweight.

The soundproofing material 7 is formed by mixing two types of foaming liquids, that is, two types of foaming liquids which cure at room temperature, and injecting them into the space 6 in the bracket 2 and solidifying them. When forming the soundproofing material 7, as shown in FIG. 4, the foaming liquid is injected from the opening 3 while the bracket 2 is laid down along with the breaker body 4. After the injection, the opening 3 of the bracket 2 is closed with a rubber cover 9 via a mounting base 8 so that the foamed soundproofing material 7 does not shift outward.

The injected foaming liquid foams in the bracket 2, so that the solidified soundproofing material 7 completely fills the space 6 in the bracket 2, and at this time, the soundproofing material 7 covers the inner wall of the bracket 2 and the breaker body 4. Adheres tightly to the outer wall of the vehicle. Therefore, the soundproofing material 7 acts on the bracket 2, the breaker body 4 and all parts between them, and as a result, the hitting sound and vibration sound generated from the breaker during operation are reduced. Further, since the soundproofing material 7 is attached to the bracket 2 and the breaker body 4, the soundproofing effect is further increased. Furthermore, since the soundproofing material 7 is made of urethane foam and is soft, if it has deteriorated, it can be easily removed by hand and a foaming liquid can be injected again to form a new soundproofing material 7.

[0010] According to the experimental results of noise measurement during work performed by the applicant, the sound volume when the soundproofing device of the above embodiment is used is assuming that the breaker is operated near a wall in an urban area. When measured at points 7 m, 15 m and 30 m away from the breaker, respectively, a soundproofing effect of about 5 to 10% was obtained as compared with the conventional soundproofing device. In particular, at a point 7 m away from the breaker, the noise level fell below the general noise regulation limit of 85 dB. This is almost the same level as the noise at the 15m point when the conventional soundproofing device is used.

The breaker of the above-described embodiment includes a rock drill such as a rock drill or a drill having the same hitting function.

[0012]

[Effect of the invention]

 Since the present invention is configured as described above, the following effects are obtained.

In the soundproofing device of the present invention, since the soundproofing material is filled in the bracket without any gap, a high soundproofing effect can be obtained. Also, since the soundproofing material is made of urethane foam, its weight is light and the whole soundproofing device can be lightened. Furthermore, since it is made of urethane foam, if it has deteriorated, it can be easily removed and a new soundproofing material can be filled.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a breaker.

FIG. 2 is a cross-sectional view of a breaker.

FIG. 3 is a perspective view in which a breaker is attached to a power shovel.

FIG. 4 is a plan view showing a state in which a foaming liquid is injected into a breaker.

FIG. 5 is an exploded perspective view of a conventional breaker.

[Explanation of symbols]

 2 Bracket 4 Breaker body 7 Soundproof material

Claims (1)

[Utility model registration claims] 1. A soundproofing device for a breaker comprising a breaker body (4), a bracket (2) for supporting the breaker body, and a soundproofing material (7) made of urethane foam filled therebetween without any gap.