JPH10230844A - Method for filling vibration damping material into long structural angle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and efficiently perform vibration damping material filling work into a hollow extruded structural angle in order to effectively prevent noise and vibration of a structural body traveling at high speed such as the Shinkansen. SOLUTION: An aluminum alloy extruded structural angle 1 is constituted of surface plates 2 and ribs 3 into a truss structure, and aluminum alloy partition plates 5 are engaged with engaging parts 4 and inserted in the longitudinal direction. Vibration damping materials 6 to be foamed by heating are attached in the specified position on both surfaces of the partition plates 5 in a not-foamed state by the specified amount. After these partition plates 5 are installed in the structural angle 1, the vibration damping materials 6 are foamed by being heated, and the hollow is filled in with the foamed vibration damping materials. Therefore, the not-foamed vibration damping materials can be previously and precisely stuck in the specified positions of the partition plates in consideration of the state of after-foaming, the inner space can be completely filled with the foamed vibration damping materials, and sound insulation performance can be improved. The vibration damping materials can be installed in the shape only by inserting the partition plates, and vibration damping material filling work is simple and efficient. Moreover, the degree of freedom of design of the extruded shape is large.

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 shape member with a vibration damping material, and more particularly, to a long member constituting a body such as a vehicle body wall and a floor of a high-speed traveling vehicle such as a Shinkansen, and an airframe. The present invention relates to a method for filling a long-shaped member suitable for filling a vibration-damping material into a hollow interior of an extruded member.

[0002]

2. Description of the Related Art Conventionally, speeding up and reducing the weight of railway vehicles, etc.
Due to the need for structural strength, structures such as vehicle walls, roofs, floors, etc.
A hollow structure in which two face plates are connected by a plurality of intermediate plates is employed, and the hollow portion is filled with rock wool or glass wool to reduce noise and vibration. 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 railway vehicle running at a high speed 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, JP-A-7-172305
Japanese Patent Application Laid-Open No. H10-216, describes a member for a railway vehicle body structure in which 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 foam rubber having an open cell structure. ing. 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, the example described in Japanese Patent Application Laid-Open No. 7-172305 discloses a method of inserting an unvulcanized rubber sheet before heating and foaming into a hollow portion of a long member as described above. In some cases, unfilled cavities were found after heating and foaming, and it was difficult to uniformly fill the foamed rubber 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 installation work is not easy due to the flexible and stretchable belt-like sheet having a length of about 25 m, and when it is installed in the longitudinal hole of the profile,
There has been a problem that the installation position is deviated or the width or thickness of the sheet 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 running structure such as a bullet train, a vibration damping material is provided to the internal space of a hollow extruded profile. An object of the present invention is to provide a method for filling a long-shaped member with a vibration-damping material, which can easily and efficiently perform a work for filling the material.

[0004]

The above-mentioned object is attained as follows. According to a first aspect of the present invention, there is provided a filling method in which a hollow extruded member forming a structure of a railway car or an airplane is filled with a damping material which foams by heating, and the damping material before foaming is partitioned in advance. After the partition plate is inserted into the hollow interior, the hollow interior is filled with a foamed vibration damping material by heating. Can be stuck to a predetermined position of the partition plate with high accuracy in advance. for that reason,
A predetermined space inside the elongated material can be completely filled with the foamed damping material. According to a second aspect of the present invention, a vibration damping material is attached to both sides of the partition plate, and the two spaces partitioned by the partition plate are filled with the vibration damping material. Can be filled with vibration damping material, and efficient filling work can be performed. According to a third aspect of the present invention, the partition plate is divided into predetermined lengths in the insertion direction in advance, and is inserted by being engaged with an engagement portion formed in the extruded profile, and extends for example to 25 m. When the partition plate is inserted in the longitudinal direction of the long shape member, the partition plate is divided into short portions of an arbitrary length, so that the partition plates can be sequentially inserted and a smooth operation can be performed. In the invention according to claim 4, the extruded shape is
Since the hollow cross section has a truss structure, it is possible to provide a strong degree of freedom in design by integral molding.

[0005]

Embodiments of the present invention will be described below with reference to the drawings. 1A and 2 are cross-sectional views of a long aluminum alloy extruded member constituting a structure of a high-speed railway vehicle in a lateral direction. The extruded aluminum alloy member 1 is formed in a truss structure by the face plate 2 and the rib 3. A groove-shaped rail-shaped engaging portion 4 is formed inside the profile, and a partition plate 5, which is a flat plate made of an aluminum alloy, is engaged with the engaging portion 4 to extend the hollow space inside the profile in the longitudinal direction. To be inserted into. FIG. 1B shows a configuration in which a partition plate 5 is engaged between one ridge and the face plate 2 instead of the engaging portion 4 being a groove formed by two ridges. These extruded aluminum alloy material 1 and partition plate 5
The material used was aluminum alloy JIS A6N01, which had been subjected to T5 treatment in advance as a heat treatment. On both surfaces of the partition plate 5, vibration damping materials 6 that foam by heating are attached to predetermined positions of the partition plate 5 by a predetermined amount in a state before foaming. As shown in these figures, the partition plate 5 to which the vibration damping material 6 before foaming is attached is inserted into the hollow interior of the shape member 1 and then installed. Can be filled with the foamed vibration damping material 7.

According to the present embodiment, in consideration of the state after foaming, the vibration-damping material before foaming can be precisely and preliminarily adhered to a predetermined position of the partition plate by a predetermined amount, as shown in FIG. In addition, the hollow space inside the profile can be completely filled with the foamed damping material, and the sound insulation damping performance can be improved. Further, since the vibration damping material can be positioned in a predetermined space inside the profile simply by inserting the partition plate, the operation of filling the vibration damping material is simple and efficient. In addition, the damping material can be installed in two spaces by one insertion operation. In addition, the partition plate 5 can be divided into a short partition plate in the longitudinal direction, and by dividing, the long distance in the longitudinal direction can be smoothly inserted. In addition, since the hollow cross section of the extruded member has a truss structure, the degree of freedom in design is strong as an integrally formed member.

Known materials can be used as the foam damping material. For example, unvulcanized rubber is foamed and vulcanized at the same time as foaming by heating, and the inside of the hollow material is filled with a rubber elastic body having an open cell structure. Can be done. For example, 10 to 40% by weight of unvulcanized rubber, 1 to 3% by weight of vulcanizing agent, 10 to 10% by weight of softening agent
40% by weight, foaming agent 1-10% by weight, filler 5-30
%, A composition containing 30 to 70% by weight of a flame retardant,
By adjusting the blending amount, dispersion of the foaming agent, and the like, a foamed rubber elastic body having a foaming ratio of 5 to 25 times and an average cell diameter of 0.1 to 10 mm can be obtained. 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, it is easy to obtain a large loss factor.
R is preferred. 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,
Azodicarbonamide, dinitrosopentamethylenetetramine, etc. are used.Also, in order to promote the decomposition of the foaming agent and achieve high foaming, urea and the like are used so as to promote film growth and perform stable bubble formation. A foaming aid is also used as appropriate. 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. 3 and 4 are sectional views showing other embodiments of the present invention. The aluminum alloy extruded profile 10 shown in FIG.
2 and the partition plate 14 to which the vibration damping material 13 is adhered is attached to the face plate 1
1 is installed diagonally. Further, the extruded aluminum alloy material 15 shown in FIG. 4 is provided with ribs 17 obliquely to the face plate 16, and the partition plate 19 to which the vibration damping material 18 is adhered is installed vertically to the face plate 16. It was made. According to these embodiments,
There is an effect similar to that of the embodiment shown in FIG.

FIG. 5 is a sectional view of the structure of a high-speed railway vehicle. As shown in the drawing, the structure 20 is formed by connecting a plurality of long extruded aluminum alloy members 21 by welding or the like. The shape member 21 is formed by appropriately combining shape members having different shapes depending on a part to be used. Note that the materials and heat treatment conditions of the extruded aluminum alloy used in the above embodiment are merely examples, and other materials and other appropriate heat treatments may be selected. As described above, according to these embodiments, the cross-section of the extruded profile can adopt any shape in response to practical constraints such as strength, and a known material is used as the foam damping material. can do. Then, in order to effectively prevent noise and vibration during high-speed running of a Shinkansen or the like, the work of filling the internal space of the hollow extruded profile with the vibration damping material can be performed simply and efficiently.

[0010]

As described above, according to the present invention, the operation of filling the damping material into the internal space of the hollow extruded profile constituting the structure of the high-speed traveling vehicle such as the Shinkansen can be performed simply and efficiently. It is possible to effectively prevent noise and vibration during high-speed running.

[Brief description of the drawings]

FIG. 1 shows one embodiment of the present invention, and is a cross-sectional view in the short direction of a long extruded aluminum alloy material to which a vibration damping material before foaming is mounted.

FIG. 2 is a cross-sectional view showing a state in which a hollow space is filled by foaming a damping material with the profile of FIG.

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

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 extruded aluminum alloy material 2 face plate 3 rib 4 engaging part 5 partition plate made of aluminum alloy 6 damping material before foaming 7 damping material after foaming 10 aluminum alloy extruded material 11 face plate 12 rib 13 damping material before foaming 14 aluminum Alloy partition plate 15 Aluminum alloy extruded profile 16 Face plate 17 Rib 18 Vibration damping material before foaming 19 Aluminum alloy partition plate 20 Structure 21 Aluminum alloy extruded profile

Claims (4)

[Claims] In a filling method for filling a hollow interior of a long extruded shape member constituting a structure of a railway car or an airplane with a vibration damping material which is foamed by heating, a vibration damping material before foaming is previously formed on a partition plate. Mounting the partition plate into the hollow interior of the extruded profile, heating and filling the hollow interior with a foamed vibration damping material by heating, and a method for filling the long profiled material with the vibration damping material. . 2. A damping material is attached to both sides of said partition plate,
The damping material filling method according to claim 1, wherein two spaces separated by the partition plate are filled with a damping material. 3. The vibration damping material filling method according to claim 1, wherein the partition plate is divided in advance by a predetermined length in an insertion direction, and is inserted by being engaged with an engaging portion formed in the extruded shape member. . 4. The method according to claim 1, wherein the extruded profile has a truss structure in a hollow cross section.