JP2002284004A - Bellows body for connecting rolling stock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bellows body for connecting rolling stock capable of increasing sound absorption and sound insulation effects, reducing the influence of noise on the environment in the rolling stock when the rolling stock runs, dispensing with an opening and closing door for going in and out in the rolling stock, and increasing energy saving effect for thermal insulation. SOLUTION: In this bellows body for connecting rolling stock constituted such that awning bows 3 are inserted between both inside and outside bellows sheets 1 and 2 of the double structure bellows sheet composed of both inside and outside bellows sheets 1, 2 at a predetermined interval by arranging them in parallel in the direction of length, and their both side parts are integrated by welding 4 to hold the awning bows 3, a layerlike sound absorbing member 5 is provided and arranged between both inside and outside bellows sheets between mutually opposing welded parts of adjacent awning bows 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hood for connecting vehicles, and more particularly, to the hood which is excellent in sound absorbing and sound insulating properties and can obviate the need for a vehicle opening / closing door at a vehicle connecting portion.

[0002]

2. Description of the Related Art Conventionally, a hood for vehicle connection has been made of a synthetic fabric woven fabric other than a waterproof fabric in which synthetic resin film sheets are laminated on both sides of a synthetic fabric woven fabric generally known as a tarpaulin fabric. The required additives were added to the vinyl chloride resin, and the hood sheet having the required thickness by friction coating with a calender roll was polymerized into an inner and outer double as shown in FIG. The required hood bone insertion part is left along the longitudinal direction, and the hood bone 3 made of an elastic steel wire is inserted into the hood bone insertion part by welding, sewn or glued as appropriate. After holding
The hood body A is formed by bending and forming a rectangular tube.

[0003] When the hood body constructed as described above is erected between adjacent vehicles as a hood body for connecting vehicles, it is necessary to prevent the falling phenomenon due to its own weight at the center part and to stably maintain the height deviation. For this reason, reinforcing fiber yarns are also arranged and interposed between the inner and outer hood sheets in a lattice or oblique manner.

[0004]

However, even if the above-mentioned hood body can be prevented from drooping to some extent, no consideration is given to reducing noise during vehicle operation. However, recently, from the viewpoint of economic efficiency, cost reduction has been considered by omitting an opening / closing door that is opened and closed when traveling between adjacent vehicles. Therefore, when we reconsider the role played by the installation of doors to move between vehicles, the biggest role is related to ensuring a quiet interior environment by reducing noise such as squeaking noise during vehicle operation. I understood.

According to the present invention, based on the above findings, the use of a sound-absorbing material in a hood sheet enhances the sound-absorbing and sound-insulating effects of a vehicle-connecting hood. It is an object of the present invention to reduce the number of the doors and to eliminate the necessity of installing the opening / closing door for in-vehicle traffic, and also to improve the energy-saving effect of heat insulation and heat retention in the vehicle interior.

[0006]

That is, according to the present invention, which meets the above object, a predetermined interval is provided between the inner and outer hood sheets.
In the vehicle-connecting top body which is inserted in parallel in the longitudinal direction and penetrates the top bone, and the both sides are integrated by welding to hold the top bone, in the facing top welding part of the adjacent top bone, A layered sound absorbing material is interposed between the inner and outer hood sheets, and the layers are arranged.

Here, various known sound absorbing materials can be used as the layered sound absorbing material. Felt-like fibrous layered materials, in particular, lightweight, thin, flame-retardant felt-like non-woven fabrics having a wide range of sound absorbing frequencies are used. It is suitable.

[0008]

When the vehicle according to the present invention is used and installed over a vehicle connecting portion, noise due to creaking during vehicle operation is absorbed and blocked by a sound absorbing material between the inner and outer hood sheets, thereby significantly reducing noise in the vehicle. However, even without an opening / closing door at the vehicle end, the effect of noise on the environment inside the vehicle is greatly reduced. Therefore, the installation of the door can be omitted, and the cost required for mounting the door can be reduced. In addition, the heat absorbing and heat retaining effects can be obtained by the interior of the sound absorbing material, and the cost of air conditioning can be reduced.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a view showing a main part of a top body according to the present invention, wherein 1 is an outer top sheet, 2 is an inner top sheet, and 3 is a longitudinal section between the inner and outer top sheets 1 and 2. The hood bones are arranged side by side in the direction. Reference numeral 4 denotes both sides of the hood bone 3. The inside and outside hood sheets are welded and integrated as shown in FIG. 4 to stabilize the insertion of the hood bone 3. This is the welded part.

Here, the inner and outer hood sheets 1 and 2 are made of a synthetic fiber woven fabric such as a polyester filament on a plasticizer or the like.
A base material such as tarpaulin waterproof cloth obtained by laminating a vinyl chloride film sheet on both sides of a heat-treated base material or a woven fabric using synthetic fibers, topped with a blend composition comprising a vinyl chloride resin or the like containing necessary additives by a calendar roll. It is used, but if necessary, insert high-strength fiber yarn between weft yarns of the hood sheet woven fabric, or insert a high-strength reinforcing fiber yarn bundle between the inner and outer hood sheets in a grid or diagonally. A thermocompression-bonded material having an increased strength is also used. Of course, the present invention is not limited to the above, and a tarpaulin waterproof cloth based on a known knitted fabric can be used. The hood bones 3 arranged in parallel between the upper and lower hood sheets 1 and 2 are usually made of a metal steel wire (round steel bar). However, if the material permits, another metal or a synthetic resin wire such as FRP may be used.

The hood bone 3 has inner and outer hood sheets 1 and 2 welded on both sides thereof to form a passage for the hood bone 3 between the welded parts 4 and to form the inner and outer hood sheets 1. , 2 are integrated, but the welded portion 4 is usually welded linearly, so that the unwelded portion is the inner and outer hood sheets 1 and 2 separated from each other, and there is a gap inside. A space is formed.

In general, the hood body is manufactured by arranging the required number of hood bones 3 in parallel on a hood sheet laid on a plane, stretching the hood bone 3 on the hood sheet, and then laying the hood bone 3 on the hood sheet. Another hood sheet is put on top of another hood sheet, and both hood sheets are integrated by welding, and then formed into a rectangular tube.Thus, welding is commonly used as a very effective means of integration from the viewpoint of manufacturing efficiency. There is no exclusion of fastening and integrating using a bonding or adhesive.

Thus, the present invention provides a hood body having the above-described structure, in which the hood bone 3 is particularly inserted as a feature thereof.
The inner and outer hood sheets 1 in the separated state between opposing welded portions of the adjacent hood bones 3 of the hood body in which the hood bones 3 are stably held between the inner and outer hood sheets 1 and 2 by welding 4. 2
The layered sound absorbing material 5 is interposed in the gap space.

FIG. 2 shows the state in an enlarged manner. The hood bone 3 is inserted between the inner and outer hood sheets 1 and 2 and is integrated by the welded part 4 and the adjacent hood bone 3 is opposed to the hood bone 3. The layered sound absorbing material 5 is inserted and held in the gap space between the welded portions.

As the layered sound absorbing material, various sound absorbing materials such as known glass wool, rock wool, and resin foam can be used. A polyester layered nonwoven fabric which is used and is particularly lightweight, thin, and has high tensile strength in the longitudinal and transverse directions with a smaller basis weight than conventional nonwoven fabrics is effective. These may be used alone or in the form of a fiber sheet or resin sheet. In particular, the use of a non-woven fabric having flame retardancy conforming to the flame retardant standard or the like is preferable because a flame retardant effect is obtained.

Further, the above-mentioned fibrous material may be subjected to a surface treatment so as to enhance the sound absorbing characteristics and impart non-combustibility. For example, glass wool may be treated with a glass cloth surface, glass wool may be treated with aluminum kraft paper, and glass wool may be treated with a polyester film. The layered sound absorbing material 5 is not particularly limited in thickness, area and the like, and may be used as long as it can be inserted into the space between the inner and outer hood sheets 1 and 2 and put to practical use. For example, a layered nonwoven fabric having a basis weight of 250 to 300 g / m ² and a thickness of about 5 to 10 m can be used sufficiently. Needless to say, the layered sound absorbing material 5 is not limited to one layer, and may be used in a plurality of layers by polymerizing with a fiber layered body of the same or another material.

Next, the case where the sound absorbing material of the present invention is installed is described as a top body with one top sheet and a top body with two top sheets.
The sound insulation was measured in comparison with the case of the heavy structure sheet. The data was as shown in FIG. The measurement is based on JIS-A-
According to the 1416 method (sound transmission loss: reverberation room method), the sample installation place is placed in the middle, a sound source room is placed on one side, and a sound receiving room is placed on the other side, and sound is generated from speakers in the sound source room. The sound volume (dB) was measured, and the sound transmission loss was obtained from the dB difference. Note that a measurement sample having a sample size of 50 cm × 50 cm, a measurement size of 40 cm × 40 cm, and a thickness of 5 cm or less was used. As shown in FIG. 3, in the low frequency range where the frequency (Hz) was relatively low as shown in FIG. 3, there was no significant difference between the present invention (developed product) and the other products.
It was found that the hood body (developed product) of the present invention was remarkably excellent in sound absorption and sound insulation as the frequency exceeded 250 Hz and became higher and higher. From this, it has been proved that the hood body of the present invention can sufficiently prevent the noise during the operation of the vehicle even if the opening and closing doors on both sides of the vehicle are omitted, and does not affect the environment inside the vehicle.

[0019]

According to the present invention, there is provided a double-structured hood seat for vehicle connection, comprising an inner and outer hood sheet as described above.
A layered sound-absorbing material is interposed between the inner and outer hood sheets between the oppositely welded parts of adjacent hood bones. In the conventional double-structured sheet, sound absorption and sound insulation are hardly considered. However, since it only has the general effect of the hood, the opening and closing doors at both ends of the vehicle are necessary in order to cut off noise during vehicle operation even when the connecting hood is installed, For this reason, costs of several tens of thousands of yen were required for each door, but the hood body of the present invention significantly improved the sound absorption and sound insulation properties, and was able to sufficiently reduce the noise even without the need for an opening / closing door. The noise to the environment is eliminated, the cost of installing the door is saved, and it has a remarkable effect of achieving significant cost savings. In addition, the present invention has an effect of heat insulation and heat retention by the interposition of the sound absorbing material, and an effect of saving air-conditioning costs such as cooling and heating in a vehicle.

[Brief description of the drawings]

FIG. 1 is a partial perspective view showing a main part of a top body according to the present invention.

FIG. 2 is a partial sectional view of the top body.

FIG. 3 is a table showing comparison data of sound insulation measurement results.

FIG. 4 is a partial perspective view of a top body made of a known double structure top sheet.

[Explanation of symbols]

 A hood body 1 outer hood sheet 2 inner hood sheet 3 hood bone 4 welded part 5 sound absorbing material

Claims (2)

[Claims] 1. A double-structured hood sheet comprising inner and outer hood sheets is provided with a predetermined interval between the inner and outer hood sheets, and hood bones are inserted in parallel in the length direction, and both sides are welded. In the vehicle connecting hood body which is integrated by holding the hood bone, a layered sound absorbing material is interposed between the inner and outer hood sheets between the welding portions of the adjacent hood bones facing each other,
A top body for vehicle connection, characterized by being layered. 2. The vehicle-top connecting body according to claim 1, wherein the layered sound absorbing material is a flame-retardant felt-like fiber layered body.