Interior material, panel forming body, and manufacturing method for interior material

Abstract

The present invention provides an interior material of an operator's cab of a work machine, the interior material comprising at least a structure member and a noise absorption layer, wherein the structure member has at least one rib which is formed on an inside surface of a base portion thereof and comes into intimate contact with an inside surface of an exterior material and a hermetically sealed hollow portion is formed by the rib in intimate contact with the exterior material, and the noise absorption layer is disposed on an outside surface of the structure member. With the interior material, a work environment in the operator's cab of the work machine can be enhanced by effectively suppressing the noise entering from an outside of the operator's cab.

Description

TECHNICAL FIELD [0001] The present invention relates to an interior material of an operator's cab for use in work machines, work vehicles, and the like such as civil engineering / construction, agricultural, and other industrial machines and vehicles, and to a method of manufacturing the interior material. BACKGROUND ART [0002] In general, work machines include machines and vehicles for performing various types of works (hereinafter, referred to as work machines), for example, a civil engineering / construction machine such as a hydraulic shovel and the like, an agriculture machine such as a tractor and the like, a material handling machine, and other industrial machines, vehicles and the like. An operator's cab disposed to these work machines is placed in a bad working environment with violent noise and vibration. [0003] For example, there is a hydraulic shovel 100 as one of civil engineering / construction machines as shown in FIG. 8. In the hydraulic shovel 100, an upper pivot body 10...

AI Technical Summary

Benefits of technology

[0021] The interior material of the operator's cab of the work machine of the present invention has at least the structure member and the noise absorption layer. The structure member includes at least one rib which is formed on the inside surface of the base portion thereof and comes into intimate contact with the inside surface of the exterior material as well as the hermetically sealed hollow portion formed by the rib in intimate contact with the exterior material, and the noise absorption layer is disposed on the outside surface of the structure member.

[0022] That is, the interior material of the present invention can obtain a very excellent noise insulation effect by being simultaneously provided with a function for suppressing vibration of the exterior material by the rib in intimate contact with the exterior material and a function for absorbing the noise entered the hermetically sealed hollow portion of the structure member after it is diffusedly reflected and damped.

[0023] In addition, when the interior material of the present invention has the noise absorption layer on the inside surface of the structure member and the part of the surface of the rib, the noise which enters the hermetically sealed hollow portion of the structure member can be damped by being diffusely reflected repeatedly in the hollow portion as well as can be absorbed by the noise absorption layer on the inside surface of the structure member. Consequently, the interior material can obtain a very excellent noise insulation effect.

[0024] Further, in the present invention, when the structure member is formed of any one of polyurethane, polypropylene, ABS resin, and AES resin, these materials are excellent in molding easiness, and therefore, the structure member can be easily and securely molded even if the interior material has a complicated shape. Further, since the structure member molded by the molding material has high rigidity, it can stably keep a predetermined shape.

[0025] Furthermore, when the noise absorption layer of the interior material is the continuous foam body and / or the fiber aggregate formed of at least one of low repulsion urethane, semi-rigid urethane, PET resin, and polystyrene resin, it can be easily formed in conformity with the shape of the structure member, and communication pores / ventilation spaces can be easily formed therein. Accordingly, even if the noise absorption layer is thin in wall thickness and has complex and minute spaces formed therein, it can very effectively absorb noise, whereby the noise insulation property of the interior material can be more enhanced.

[0026] The panel forming body of the present invention is provided with the interior material having the excellent sound insulation effect as described above. Thus, when it is attached to, for example, an operator's cab of a work machine, the noise entering from the outside of the exterior material can be effectively suppressed, so that the working environment in the operator's cab can be enhanced.

Problems solved by technology

An operator's cab disposed to these work machines is placed in a bad working environment with violent noise and vibration.

As a result, an inside of the operator's cab 110, in which the operator drives the hydraulic shovel, has violent noise and vibration and is placed in a very bad working environment.

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