JPH10230845A - Method for filling soundproof vibration damping material into long structural member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simply and efficiently perform soundproof vibration damping material filling work into an inner space of a long structural member for constituting a structural body by effectively preventing noise and vibration of a high-speed traveling vehicle such as the Shinkansen. SOLUTION: A long structural member 1 for constituting a structural body of a high-speed railway rolling stock is assembled into an integral truss structure by pinching an angle ribs 3 between long surface plates 2 from both sides and laser-welding an engaging parts 4. Not-foamed soundproof vibration damping materials 5 are previously attached in the specified positions of the surface plates 2 by the specified amount, and the inner space is filled with soundproof vibration damping material foamed by being heated after assemblage. Therefore, the soundproof vibration damping materials can be previously and precisely stuck in the specified positions of the not-assembled long material in consideration of the state of after-foaming, and the inner space of the long structural-'member can be filled with the soundproof vibration damping materials without any clearance, and therefore, soundproof vibration damping performance can be improved. Since installation work of the soundproof vibration damping material is simple and efficient, moreover, since an aluminum alloy extruded shape can be formed into the section of the integral truss structure, the long structural member having high strength and light weight can be provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for filling a long structural member with a soundproofing damping material, and more particularly, to a long structural member constituting a structure of a high-speed traveling vehicle such as a bullet train or an airplane.
The present invention relates to a sound-insulating damping material filling method suitable for filling a sound-insulating damping material.

[0002]

2. Description of the Related Art Conventionally, speeding up and reducing the weight of railway vehicles, etc.
Due to the necessity of structural strength, structures such as vehicle walls, roofs, floors, etc. adopt a hollow structure in which two face plates are connected by a plurality of intermediate plates. And glass wool. 2. Description of the Related Art In recent years, a long (eg, 25 m) aluminum alloy extruded material having a hollow interior, light weight, and high rigidity has been used for a structure of a high-speed railway vehicle such as a bullet train. However, for example, noise and vibration of railway vehicles include noise such as running noise, motor noise, pantograph sliding noise, wind noise of the vehicle, and vibration transmitted during traveling from the wheels. Since the specific gravity is lighter than that of, noise and vibration are easily transmitted, and various means for reducing noise and vibration are taken in consideration of the riding comfort of passengers. For example, in Japanese Patent Application Laid-Open No. 7-172305, an unvulcanized rubber sheet that expands and expands by heating is inserted into a hollow structure, and this is heated to fill the internal space with a foamed rubber having an open-cell structure. A member for a railway vehicle structure is described. JP-A-7-164584 discloses a transport machine in which a long sheet of a resin damping material is adhered to the inner surface of a rib or a face plate constituting a truss-shaped cross section of a structure to prevent noise and vibration. Structural members are described.

[0003]

However, in the example described in Japanese Patent Application Laid-Open No. 7-172305, the unvulcanized rubber sheet before heating and foaming is inserted into the hollow portion of the profile at the installation position of the sheet. Unevenness may occur and unfilled cavities may be found after heating and foaming, making it difficult to uniformly foam and fill the damping material in all internal spaces including the longitudinal direction. In addition, the resinous vibration damping material described in JP-A-7-164584 is inferior in performance as compared with the former one in which the foam is filled in the space because the sheet is simply attached. There is a drawback that a sufficient vibration damping effect cannot be obtained unless a large amount is applied. In addition, the work is not easy due to the flexible and stretchable belt-like sheet having a length of about 25 m. When the sheet is installed in the longitudinal hole of the profile, the installation position is biased or the sheet width or There is a problem that the thickness changes. SUMMARY OF THE INVENTION An object of the present invention is to solve the above-described problems. In order to effectively prevent noise and vibration of a high-speed traveling vehicle such as a bullet train, an internal space of a long structural member constituting a vehicle structure is provided. An object of the present invention is to provide a method of filling a long structural member with a soundproofing damping material, which can easily and efficiently perform a work of filling the soundproofing damping material into a long structural member.

[0004]

The above-mentioned object is attained as follows. According to the first aspect of the present invention, a long structural member forming a structure of a high-speed traveling vehicle is manufactured by combining a plurality of long members, and a soundproofing damping material that is foamed by heating is attached to the long members in advance. By heating the hollow member assembled with these long members, the soundproofing damping material is foamed, and the internal space of the hollow member is filled with a foam. hand,
The sound-insulating damping material before foaming can be accurately pasted to a predetermined position of the long material by a predetermined amount in advance. For this reason, the predetermined space inside the long structural member can be completely filled with the foamed soundproofing damping material, and the soundproofing damping performance can be improved. According to the second aspect of the present invention, the long structural member has a hollow section having a truss structure by combining the long members, so that there is a degree of freedom in design for improving structural strength, and soundproofing. The damping material can be filled in the internal space without any gap. Further, according to the third aspect of the present invention, since the long member forming the long structural member is made of an extruded aluminum alloy, the structure can be reduced in weight, and the high speed with excellent strength and soundproof vibration suppression performance can be obtained. A vehicle can be realized.

According to a fourth aspect of the present invention, since the long structural member is formed by assembling a plurality of long members by laser welding, an integral high-strength long structural member can be manufactured. According to a fifth aspect of the present invention, since the long structural member is assembled with an adhesive interposed between assembly engaging portions of a plurality of long members, the adhesive has elasticity, thereby providing a cushioning effect. The soundproofing damping effect occurs. Further, since the invention according to claim 6 is a long structural member manufactured by employing the above-described sound-insulating damping material filling method, the internal space is completely filled with the foamed sound-insulating damping material, and the sound-insulating damping performance is improved. An excellent, lightweight, long structural member that is strong in strength due to the cross section of the integrated truss structure.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 and FIG. 2 are cross-sectional views in the lateral direction of a long structural member constituting a structure of a high-speed railway vehicle. The long structural member 1 sandwiches the chevron rib 3 from both sides with two long face plates 2 and irradiates the engaging portion 4 with a laser beam from the direction of arrow A to perform laser welding to form an integrated truss structure. assemble. At a predetermined position of the face plate 2, a band-shaped soundproofing damping material 5 which is foamed by heating is attached in a predetermined amount in a state before foaming. As shown in FIG. 2, the long structural member 1 integrally assembled is filled with the soundproofing damping material 6 in which the soundproofing damping material 5 is foamed by heating and the internal space is foamed. Become. In this embodiment, the length of the long structural member 1 is 25 m,
The width is 42 cm and the thickness is 6 cm.

According to the present embodiment, the soundproof vibration damping material before foaming can be precisely and preliminarily adhered to a predetermined position of the long material before assembly in consideration of the state after foaming. As shown in FIG. 2, the internal space of the long structural member can be filled with the foamed soundproofing damping material without gaps, and the soundproofing damping performance can be improved. In addition, the work of installing the soundproofing damping material is simple and efficient since it is before assembly. Moreover,
The extruded aluminum alloy material can be laser-welded into a cross section of an integrated truss structure, so that a long structural member having high strength and light weight can be obtained.

Known materials can be used as the soundproofing damping material to be foamed. For example, unvulcanized rubber is foamed by heating and vulcanized at the same time as heating. Can be charged. For example,
10 to 40% by weight of unvulcanized rubber, 1 to 3% by weight of vulcanizing agent, 10 to 40% by weight of softener, 1 to 10% by weight of foaming agent, 5 to 30% of filler, 30 to 70% by weight of flame retardant By using the composition containing as a raw material and adjusting the blending amount and the dispersion of the foaming agent, the expansion ratio is 5 to 25 times, and the average cell diameter is 0.1 to 10 mm.
Foamed rubber elastic body. Specifically, in addition to natural rubber (NR), various synthetic rubbers such as styrene butadiene rubber (SBR), butadiene rubber (BR), and isoprene rubber (IR) can be used as the unvulcanized rubber. However, SBR is preferable because it is easy to obtain a large loss coefficient. As the vulcanizing agent, one obtained by mixing a vulcanization accelerator such as a thiazole compound with a sulfur compound which does not react at room temperature but reacts at 140 to 170 ° C. to generate sulfur is used. It is desirable that the blowing agent decomposes in the same temperature range as the vulcanizing agent to generate gas, and azodicarbonamide or dinitrosopentamethylenetetramine is used. In order to promote the film growth, a foaming aid such as urea is appropriately used so as to promote stable film formation and promote stable film formation. Further, as the filler, spherical calcium carbonate having a diameter of 1 to 10 μm that does not hinder the flow of rubber during vulcanization is used. Further, a flame retardant such as halogen antimony is added.

FIGS. 3A, 3B and 4 are cross-sectional views showing other embodiments of the present invention. FIG.
The long structural member 10 shown in (A) is a combination of two aluminum alloy extruded members 11 having the same cross section.
The long extruded profile 11 is formed with a slanted rib 13 and an engagement groove 14 on the face plate portion 12, and the two extruded profiles 11 are engaged with each other from the longitudinal ends to form one engagement groove 14. Is engaged with the other rib 13 and the engaging portion 15 is laser-welded from the direction of arrow A to produce an integral long truss structural member. A predetermined amount of the soundproofing damping material 16 before foaming is adhered to the inner surface side of the face plate portion 12. By heating after assembling, the foamed soundproofing and vibration-damping material can be uniformly filled in the internal space without any gap as in the case shown in FIG. FIG.
3B, the engaging groove 14 of FIG. 3A is omitted, and the engaging groove 14 is not engaged from the end, and is simply overlapped in the up-down direction in the figure with an appropriate jig. It is temporarily fixed and integrated by laser welding. The installation position of the soundproofing damping material 16 before foaming is also different from that of FIG.
It is installed on the rib 13.

The long structural member 20 shown in FIG.
As in the case of FIG. 3, two extruded aluminum alloy sections 21 having the same cross section are combined, and the elongated extruded section 21 has ribs 23 and engagement grooves 24 perpendicular to the face plate 22. The two extruded sections 21 face each other, and the other rib 23 is engaged with one engagement groove 24, and the engagement section 25
Of the truss structure by laser welding. The cross section may be only one type of extruded profile, and the soundproofing damping material 26 before foaming is attached to both sides of the rib 23 of one extruded profile 21 to simplify the operation. In the present embodiment, similarly to the embodiment shown in FIG. 2, the internal space can be filled with the soundproof vibration damping material which is uniformly foamed without any gap.

FIG. 5 is a detailed sectional view showing still another embodiment of the present invention. In the above-described embodiment, the long members to be combined are assembled by laser welding. However, the present embodiment is a method in which the long members 30 are joined to each other with the adhesive 31 interposed therebetween. In this case, the adhesive 31 needs to have sufficient strength to have rigidity and appropriate elasticity to have soundproofing and vibration damping properties.
One-part thermosetting epoxy resin adhesive or two-part room temperature curable acrylic adhesive is used. The soundproofing damping material 32 before foaming is previously installed in a predetermined position on the long material 30 by a predetermined amount before assembly. It is of course also possible to use laser welding and an adhesive together.
As shown in the figure, the soundproof vibration performance is promoted by connecting the long members 30 with an elastic adhesive 31 interposed therebetween.

The extruded aluminum alloy used in the above embodiment is an aluminum alloy JIS A6N01.
Before applying the soundproofing damping material before foaming, a material that had been subjected to T5 treatment as a heat treatment was used.
Other suitable heat treatments may be selected. As described above, according to these embodiments, a predetermined amount of the soundproof vibration damping material before foaming is adhered to a predetermined position on the long aluminum alloy extruded shape before assembly in consideration of the state after foaming. Since it is possible, the sticking work is easy and the internal space after the assembly can be filled with the foamed soundproofing damping material without any gap, so that the soundproofing damping performance can be improved. In addition, by adopting various cross sections of the long extruded shape, a truss structure having high strength can be formed by laser welding or adhesive bonding, and the number of parts can be reduced to reduce the cost. FIG. 6 is a sectional view of the structure of a high-speed rail vehicle employing the above embodiment. As shown in the figure, the structure 30 is configured by connecting a plurality of long structural members 31. By adopting the long structure member 31 of the above embodiment, the workability is good, the soundproof vibration control performance is excellent, and the structure can be made strong and lightweight, so that the speeding up of the vehicle can be performed at low cost. realizable.

[0013]

As described above, according to the present invention, the noise and vibration of a high-speed running vehicle such as a Shinkansen can be effectively prevented, and the internal space of the long structural member constituting the vehicle structure is filled with the soundproofing damping material. Can be performed simply and efficiently, and a lightweight and strong vehicle can be manufactured.

[Brief description of the drawings]

FIG. 1 shows one embodiment of the present invention and is a cross-sectional view in a lateral direction of a long structural member to which a soundproof vibration damping material before foaming is mounted.

FIG. 2 is a cross-sectional view showing a state in which the foam soundproof vibration damping material inside the long structural member in FIG. 1 is filled.

FIG. 3 is a cross-sectional view showing another embodiment of the present invention.

FIG. 4 is a sectional view showing still another embodiment of the present invention.

FIG. 5 is a detailed sectional view showing still another embodiment of the present invention.

FIG. 6 is a sectional view of the structure of a high-speed rail vehicle employing the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 long structural member 2 face plate 3 mountain-shaped rib 4 engaging portion 5 soundproofing damping material before foaming 6 soundproofing damping material after foaming 10 long structure member 11 extruded aluminum alloy material 12 faceplate portion 13 oblique rib 14 Engaging groove 15 Engaging portion 16 Sound damping material before foaming 20 Long structural member 21 Extruded aluminum alloy material 22 Face plate portion 23 Vertical rib 24 Engaging groove 25 Engaging portion 26 Sound damping material before foaming 30 Long Length material 31 Adhesive 32 Sound damping material before foaming 40 Structure 41 Long structural member

Claims (6)

[Claims] An elongated structural member constituting a structure of a high-speed traveling vehicle is manufactured by combining a plurality of elongated materials, and a soundproofing damping material that foams by heating is attached to the elongated materials in advance. Filling a long structural member with a soundproofing damping material characterized by foaming the soundproofing damping material by heating a hollow member assembled with a long material, and filling the internal space of the hollow member with a foam. Method. 2. The method according to claim 1, wherein the long structural member has a truss structure in a hollow cross section by combining the long members. 3. A long member forming the long structural member,
2. The method for filling a soundproof vibration damping material according to claim 1, comprising an extruded aluminum alloy material. 4. The method according to claim 1, wherein the long structural member is formed by assembling a plurality of long members by laser welding. 5. The method according to claim 1, wherein the long structural member is assembled with an adhesive interposed between assembly engaging portions of a plurality of long members. 6. A long structural member manufactured by using the soundproofing damping material filling method according to any one of claims 1 to 5.