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Heat insulating acoustical structure and carbody shell structure using the same

A technology of structure and sound-absorbing materials, which is applied in the direction of upper structure, vehicle parts, upper structure sub-assembly, etc., and can solve the problems of outsourcing container and heartwood deformation and sinking, heartwood deformation, and heat insulation performance degradation, etc.

Inactive Publication Date: 2006-08-16
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In the prior art described above, when the vacuum heat insulating material is installed on the vehicle body, if the vacuum heat insulating material is directly pressed against the surface of the structure and installed, a large force is locally applied to the core material of the vacuum heat insulating material, causing Deformation of the heartwood, damage to the outer container of the heat insulation material, loss of airtightness, and decline in heat insulation performance
[0009] There is also a method of fixing the surface of the vacuum insulation material by pressing the thin plate material into the rail part inside the vehicle body. However, due to long-term pressing, the outer container and the core material deform and sink, and eventually cracks occur, so it cannot be realized.
[0010] In addition, in the method of reducing the noise inside the car by pasting the vibration suppressing material on the heavy-skin structure, there will be problems of increasing the weight of the structure and the thickness of the heat insulating material, and thinning the heat insulating and sound absorbing function is required.

Method used

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  • Heat insulating acoustical structure and carbody shell structure using the same
  • Heat insulating acoustical structure and carbody shell structure using the same
  • Heat insulating acoustical structure and carbody shell structure using the same

Examples

Experimental program
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Embodiment 1

[0023] figure 1 A cross-sectional structure of a heat insulating and sound absorbing structure according to a first embodiment of the present invention is shown. The overall heat-insulating and sound-absorbing structure represented by reference numeral 1 a includes: a heavy-skin structure 10 ;

[0024] The heavy-skin structure 10 is, for example, a profile manufactured by extruding an aluminum alloy, and has a cross-sectional structure in which two parallel plates 11 and 12 are connected by ribs 13 of a framework structure.

[0025] The heat-insulating and sound-absorbing layer 20 is provided on the vehicle inner side of the heavy-skin structure 10, and has elastic sound-absorbing materials 22 and 23 formed of fibrous non-woven fabrics or foams sandwiched between both sides of the vacuum insulation panel 21. Structure. That is, the sound absorbing material 22 , the vacuum insulation panel 21 , and the sound absorbing material 23 are sequentially stacked on the vehicle inner ...

Embodiment 2

[0049] figure 2 represents another embodiment of the present invention. In the heat-insulating and sound-absorbing structure 1b of the present embodiment, the position where the vacuum insulation panel 21 is provided directly under the interior panel 24 is provided. The sound absorbing material 31 is made of the same material as the fibrous nonwoven fabric 22 used in Example 1. FIG. The thickness dimension is 16mm. The vacuum heat insulating material 21, the inner panel 24, and the heavy skin structure 10 are all the same as those of the first embodiment.

[0050] The thickness dimension t of the heavy skin structure 1 It is 40 mm as in Example 1, and the thickness dimension of the sound-absorbing layer 30 is 24 mm as in Example 1.

[0051] As a comparison object, use the comparison model's image 3 The sound transmission loss was measured with the test piece of the same size.

[0052] The result is in Figure 6 Indicated. It can be seen from the figure that regardles...

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Abstract

To obtain a wide passenger compartment space, the thickness of a heat insulating acoustical layer is reduced, and for this purpose, a comfortable in-car environment is obtained by using a vacuum insulating panel which combines high heat insulating performance and sound insulating performance. A heat insulating acoustical layer (20) is formed on one surface of a lightweight alloy structure (10) of double skin construction by using a vacuum insulating panel (21) as a middle member and sandwiching two surfaces of the panel with elastic sound absorbing materials (22, 23) made of a nonwoven fabric or a foamed body, and the heat insulating acoustical layer is covered with an interior material (24). Owing to this construction, the transmission loss of a noise which transmits from the double skin structure side is improved by the mutual actions of the elasticity of the sound absorbing material and the rigidity of the vacuum heat insulating panel.

Description

technical field [0001] The present invention relates to a railway vehicle or a monorail vehicle using a vacuum heat insulating material and a sound absorbing material. Background technique [0002] In recent years, in transportation vehicles, from the standpoint of weight reduction and pressure resistance improvement with rationalization of production and high speed, the vehicle body (double skin structure) using a large hollow section made of light alloy has been favored. Manufactured. In order to reduce weight and improve pressure resistance, these vehicle bodies have a structure having curved surfaces on the side parts and the car body of the carport. Such a vehicle body is a vehicle described in Patent Document 1, for example. [0003] As a heat insulating structure used for such a vehicle body, the current mainstream is to install a fibrous heat insulating material such as glass wool between the interior side of the vehicle body and the decorative interior to block he...

Claims

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Application Information

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IPC IPC(8): B60R13/08B60R13/02
Inventor 中元英和户取片二郎川崎健
Owner HITACHI LTD
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