JPH0948079A - Damping shape and structure for transport plane - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain damping structures including truss aluminum extruded shapes and π-type aluminum extruded shapes which excel in damping characteristics, by damping the hollow part of a shape with a damping resin. SOLUTION: Many rectangular damping resin plates 10 are placed in series on a plastic film 11 which is longer than a damping shape 1 and pasted with an adhesive to form a continuum 12. The width of the rectangle depends on the width of a rib 4 or face plates 2, 3. However, the appropriate length of the rectangular damping resin plate 10 is about 1m. Since a resin plate longer than that produces a clearance in the interface with the interior of the hollow part due to warp, etc., and involves air, it should be cut to a length enough to obtain a flat rectangle. The continuum 12 is inserted into the hollow part 7 with the damping resin 10 faced down. The damping resins 10 can be inserted while being butted together.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a truss-shaped member having a pair of face plates and ribs and a hollow portion formed therein, or a single face plate having ribs protruding to form a recess on one side. The π-shaped profile, which relates to the vibration-damping profile used in the part where it is necessary to prevent vibration noise, the manufacturing method of such vibration-damping profile, and the transportation using the vibration-modulating profile. Regarding structural members.

[0002]

2. Description of the Related Art For example, a lightweight and highly rigid constituent member of a railway vehicle running at high speed such as a bullet train is required. Therefore, the structural members have come to be formed by using an aluminum extruded shape member. The floor surface is made of a truss-type aluminum extruded material having zigzag ribs between two face plates, and the side walls and the ceiling surface are π-type ribs with ribs protruding from one side of one face plate. Aluminum extruded profile is used.

However, an aluminum material having a low specific gravity is more likely to transmit vibration noise than iron having a high specific gravity, and it is necessary to reduce the vibration noise in consideration of the riding comfort of passengers. Therefore, for the truss type aluminum extruded profile, in order to prevent rolling noise and motor noise from being transmitted from the wheels, it is a restrained type structure in which an elastic plate such as an aluminum plate is pasted on the face plate on the passenger side with resin. It has been proposed by the present inventors to employ a vibration structure. In the case of a π-type extruded aluminum material, sound absorbing glass wool has been used to fill a concave portion formed by a face plate and a rib.

[0004]

[Problems to be Solved by the Invention] However, 200 km
In a vehicle running at high speed such as / hour, the vibration energy of the truss type aluminum extruded profile is attenuated in the sandwich structure part, but the vibration energy passing through the sandwich structure is suppressed through the ribs. Be transmitted without. In addition, at such a high speed, a turbulent air flow that cuts the sky around the structure at a high speed is generated, and the phenomenon of vibrating the side wall and the ceiling surface at a high frequency occurs. It absorbs energy and cannot absorb the vibration energy generated on the side wall and the ceiling surface. As a result, the vibration energy of the truss type aluminum extruded shape and π type aluminum extruded shape is transmitted to the passenger room without being attenuated and released as acoustic energy in the air, which significantly reduces the noise in the passenger room. There was a problem that I could not do it.

The present invention has been made in view of the above problems of the prior art. The first object of the present invention is to provide a truss type aluminum extruded profile having excellent vibration damping characteristics and It is to provide a vibration-damping profile such as a π-type aluminum extrusion profile, and secondly to provide a structural member for transportation using the vibration-damping profile having such excellent vibration-damping characteristics. Third
Another object of the present invention is to provide a manufacturing method capable of easily manufacturing such a vibration-damping profile having such excellent vibration-damping characteristics.

[0006]

DISCLOSURE OF THE INVENTION The present invention is a profile formed of a pair of face plates and ribs, and a hollow portion is formed inside the profile by the ribs and face plates, for example, truss type aluminum extruded profile. On the other hand, the basic structure is to provide a damping resin on the inner surface of the hollow portion. This hollow portion is a space that originally exists, and when a damping resin is attached to the inner surface of this portion, vibration energy for bending the face plate and ribs is converted into heat energy, and a considerable acoustic energy reduction effect is recognized. If damping resin is applied to the hollow inner surface of the sound source side plate, and damping resin is further applied to one side of the diagonal ribs, the damping will occur at the face plate portion and also during transmission through the ribs, so that acoustic energy is synergistically generated. Will be reduced. Further, the application of the damping resin can be applied not only to the truss type aluminum extruded profile but also to the concave portion of the π type aluminum extruded profile, especially inside the face plate. When such a truss type aluminum extrusion damping profile is used for the floorboard of a high-speed railway vehicle and a π type aluminum extrusion damping profile is used for the side wall and ceiling of the high-speed railway vehicle, noise in the passenger compartment is significantly reduced.

In particular, when the damping resin is inserted into the hollow portion of the truss type aluminum extruded damping material, if a continuous member in which the damping resin is stretched on the plastic film is used, it is easy to insert and the damping resin is melted. When heated, the plastic film becomes an adhesive or a cover. Also, when inserting the heat-fusible damping resin directly into the hollow portion, the surface of the damping resin plate is embossed with an uneven pattern in which grooves intersect, and this damping resin plate is embossed. The adhesive side is provided, and preferably a through hole is provided in the thickness direction at the intersection of the grooves to facilitate air escape and improve adhesion. Further, in the case of an extruded profile of an age hardening type aluminum alloy, heating of the damping resin can be performed together with heat treatment for age hardening, which saves energy and avoids duplication of heating steps.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS In order to describe the present invention in more detail, it will be explained with reference to the accompanying drawings. FIG. 1 shows a cross section of a vibration damping profile of a truss type aluminum extruded profile. A long aluminum extruded profile 1 supports upper and lower face plates 2 and 3 with zigzag inclined ribs 4 and vertical ribs 5 and 6 at both ends, and a triangular hollow portion 7 and an inverted triangular hollow portion 8 and trapezoidal portions at both ends. Has a truss type cross-sectional shape in which the hollow portion 9 is formed.

A damping resin 10 and a plastic film 11 are attached to the lower surface of the hollow portion 7, the slope of the hollow portion 8 and the slope and lower surface of the hollow portion 9. In the illustrated example, the lower face plate 3 is on the sound source side, and like the upper inner face of the face plate 3 and the upper inner face of the inclined rib 4, the damping resin 10 is used.
The plastic film 11 is attached to a surface on which the plastic film 11 can be placed by its own weight. That is, a flat one is placed on the hollow portion 7, a V-shaped one is placed on the hollow portion 8, and a valley-folded one is placed on the hollow portion 9, By heating, the damping resin 10 melts and sticks to the inner surface of the hollow portion.

The vibration damping resin 10 is used by selecting an appropriate thickness and material according to the required vibration damping property. As for the thickness, a thickness in the range of 1 to 10 mm is usually appropriately selected and used. As the material, a deformed asphalt-based resin or a butyl rubber-based special synthetic rubber having excellent vibration damping properties is used. The damping resin 10 is not limited to one that self-melts by heating, but may be one that is attached to the inner surface of the hollow portion with an adhesive. Further, the damping resin 10 is not limited to one formed of a uniform material as a whole, but has a structure in which the surface side is a hard material and the inner surface side is soft and self-fusing material is laminated as two layers. Can be specified. Furthermore, in order to enhance the vibration damping property and add other functions,
In addition to the plastic film described below, a thin film made of a different material such as an aluminum foil can be attached to all or part of the surface of the vibration damping resin 10.

As the plastic film, a polyamide film or the like is used. This plastic film plays a role as a cover for preventing the vibration damping resin 10 from being directly exposed and dust and the like being attached to the surface thereof. Therefore, the aluminum foil can be used instead of the plastic film.

Now, when vibration from a sound source (lower side of the drawing) is applied to such a damping material 1, the face plate 3 is vibrated,
Start bending vibration. Face plate 3 and plastic film 1
The damping resin 10 sandwiched by 1 undergoes bending deformation, and part of the vibration energy is converted into heat energy. The remaining vibration energy propagates to the rib 4, and the rib 4 also starts bending vibration. The vibration damping resin 10 sandwiched between the ribs 4 and the plastic film 11 also undergoes bending deformation, and part of the vibration energy is converted into heat energy. As a result, the sound source side face plate 3
The bending vibration of the diagonal ribs 4 is suppressed, and the vibration energy of the entire truss structure is greatly suppressed. Therefore, the vibration energy transmitted to the face plate 2 on the side opposite to the sound source (on the static environment side) is considerably reduced. , Enhances the sound insulation effect of the overall vibration control profile.

Particularly, the damping resin 10 for the face plate 3 is
Since it is provided on the inner surfaces of the hollow portions 8 and 9 that originally exist, the thickness itself of the profile 1 does not increase. Therefore, as compared with a case where an elastic plate is attached to the outside of the face plate 3 with a viscoelastic resin sandwiched between them, the thickness dimension does not increase and the weight increase is small, and the vibration damping characteristics are weighted by the effect of the rib 4. .

Next, with reference to FIG. 2, a method of manufacturing the vibration-damping profile shown in FIG. 1 will be described. A large number of rectangular vibration-damping resin plates 10 are arranged in series on a plastic film 11 longer than the vibration-damping shape member 1, and are adhered with an adhesive to form a continuous body 12. The width of the rectangle is determined by the width of the ribs 4 and the face plates 2 and 3 to be bonded, but the length of the rectangular vibration damping resin plate 10 is appropriately around 1 m. If it is too long, there will be a gap between it and the inner surface of the hollow part due to warping, etc., and air will be entrained in it, so cut the length to the extent that a flat rectangle can be secured. Then, the damping resin 10 is placed on the lower side, and the continuous body 12 is inserted into the hollow portion 7. Damping resin 1
Although it is possible to push the 0s together while pushing them in, if it is difficult to push them in, it is possible to attach a string to the tip of the plastic film 11 and pass the string through the hollow portion 5 first, and then pull the string to pull it in. . Then, as shown by the two-dot chain line in the figure, when both ends of the plastic film 11 are projected from the ends of the hollow portion 7 and both ends of the plastic film 11 are pulled, slack of the plastic film 11 and warpage of the damping resin 10 are caused. Etc. are corrected, and the entire continuous body 12 comes into close contact with the inner surface of the lower side of the hollow portion 7, and air entrapment is reduced. Further, if necessary, the plastic film 11 protruding from the end may be fixed with a tape or the like in a state where tension is applied to the plastic film 11 to give tension to the plastic film 11.

Similarly, a continuous body bent in a V shape is also inserted on the upper side of the inclined rib 4 to be in close contact therewith. Next, continuum 1
The whole of the profile 1 into which 2 is inserted is put in a heating furnace and heated. Then, the damping resin 10 is melted by heating, and the damping resin 10 is fused to both the inner surface of the hollow portion and the plastic film 11.

FIG. 3 is a sectional view of another damping profile. FIG.
The difference from the above is that the damping resin 10 stretched on the inner surface of the hollow portion 8 is stretched via an adhesive layer 13 of a plastic film. That is, the damping resin 10 is not covered on the outer surface as shown in FIG. 1, but is exposed.

As the adhesive layer 13, a hot-melt type plastic film such as a polyester film or a polyamide film is used. Also, film 1
Instead of 3, a net made of nylon, a net made of polyethylene, or a net such as a gauze cloth is also used. In short, any material that has flexibility and area and can bond the vibration damping resin and the inner surface of the hollow portion may be used. In particular, a hot metal type plastic film has excellent adhesiveness, melting property and slip property, facilitates the insertion of the vibration damping resin plate 10 into the hollow portion 8 before heating, and melts and becomes an adhesive after heating, Vibration resin plate 10
Are indirectly bonded.

Next, a method of manufacturing the vibration-damping profile 1 shown in FIG. 3 will be described with reference to FIG. The damping resin plates 10 are arranged and adhered on the plastic film 13 to form a continuous body 12, which is inserted into the hollow portion 7. The plastic film 13 has a hollow portion 7
The lower surface of the sheet is smoothly slid, and the damping resin 10 is sequentially pushed in. The plastic film 13 and the damping resin 10 are melted by heating, and the inner surface of the hollow portion of the damping profile 1, the plastic film 13 and the damping resin 10 are fused to each other. Therefore, the plastic film 13 is the damping resin 1
What melts at a temperature similar to 0 is preferable. A rubber adhesive that can be bonded at room temperature is used to bond the damping resin 10 and the plastic film 13.

FIG. 5 is a view showing another method of inserting the continuous body 12. FIG. 5 (a) discloses a method in which the plastic film 13 is slid downward, inserted, and then inverted upside down using a reversing machine or the like, and the damping resin 10 is positioned so as to be in contact with the inner surface of the hollow portion. Has been done. That is, the rib 4,
4 shows a state in which the two continuous bodies 12 along the line 4 are inserted. First, attach the lower continuous body 12 to the plastic film 1
Insert 3 downward and then insert the upper continuum 12 or the upper and lower continuums 12, 12 simultaneously. Then, as shown in FIG. 5B, the profile 1 is turned upside down, and the continuous bodies 12, 12 are heated along the upper inner surface of the rib 4. Alternatively, a continuous body that is bent in a V-shape along the rib 4 is inserted and turned upside down so that the damping resin 10 is positioned so as to contact the inner surface of the hollow portion. Thus, when the damping resin 10 is melted and directly adhered to the inner surface of the rib 4, the rib 4 and the rib 4 are melted when the plastic film is melted, as in the case where the damping resin is adhered to the rib through the plastic film. Air existing between the plastic films does not remain as it is, and it is possible to prevent the adhesive strength between the damping resin 10 and the inner surface of the rib 4 from being lowered.

In the above-mentioned embodiments, the case where the plastic film is used as the continuous member has been described. However, when the net is used, the melted damping resin flows through the eyes of the net, so that the adhesion is improved. There is. Further, a film or a net can be made into a continuous body in which two damping resin plates are sandwiched. Further, the ends of the damping resin may be attached to each other with a tape, or a string or a wire may be passed through the damping resin plate to form a continuous body. Furthermore, although the case where an aluminum extruded shape member is used as the shape member has been described, the present invention is also applicable to a shape member in which upper and lower face plates and ribs are integrated by welding or bonding. Furthermore,
The portion to which the damping resin is attached is not limited to that shown in FIGS. 1 and 3, but the damping resin is attached only to one side of the oblique rib 4, the damping resin is attached only to the inner surface of the face plate 3 on the sound source side, Instead of the inner surface of the face plate 3 on the sound source side, a damping resin is attached to the inner surface of the silent side face plate 2, the damping resin is attached to both of the inner surfaces of the sound source side and the silent side face plates 2 and 3, diagonal ribs It is also possible to add a damping resin to both sides of 4, and in some cases, a constrained sandwich structure in which elastic plates sandwiching a viscoelastic resin are stuck to the outer surfaces of the face plates 2 and 3.

Further, referring to FIG. 6, a case where the heat-fusible damping resin plate 14 is directly inserted into the hollow portion will be described. As shown in the figure, a large number of vibration-damping resin plates 14 cut into a rectangle are prepared and sequentially pushed into the hollow portion 8. In this way, the damping resin plate 14 is inserted into the desired inner surfaces of the hollow portions 7, 8, and 9,
It is placed on the inner surfaces of the hollow portions 7, 8 and 9.

The heat-sealable damping resin plate 14 has a thickness of 1 to
A sheet of 10 mm of a modified asphalt-based resin or butyl rubber-based special synthetic rubber is molded into a sheet, and the surface is embossed with a three-dimensional pattern. Then, it is inserted into the hollow portion 8 so that the side on which the embossing 15 is performed becomes the adhesive surface. In the illustrated example, the embossing 15 is formed by transferring a concavo-convex pattern in which V-shaped grooves are arranged in a rhombus shape. For example, press transfer with a cooled embossing roll and a rubber roll on a softened sheet,
The embossing transferred through the cooling roll is fixed.
The embossing 15 is not limited to the diamond-shaped arrangement of the V-shaped groove, but may be a random pattern as long as the concave portions of the surface irregularities are continuous to the outer periphery.

Further, not only the one-sided embossing 15 but also a through hole 16 in the thickness direction is provided at the intersection of the V grooves. The through holes 16 are for removing air that is likely to be trapped on the bonding surface side during heat fusion, and preferably have a diameter of 3 mm or more so as not to be blocked during heat fusion. The processing of the through hole 16 can be performed simultaneously with the embossing by using the above-mentioned embossing roll with a pin protruding at the intersection of the V ridges.

The vibration-damping resin plate 14 thus formed
Is cut into a flat rectangle and inserted into the hollow portion 8. It is also possible to push in the damping resin plates 14 one after another while abutting them, but connect the damping resin plates 14 to each other with a string or the like,
It can also be drawn into hollow part 5 via a cord. Furthermore,
Since it is possible to use the damping resin 14 having substantially the same length as the shape member, it is also possible to pull it in from one end of the shape member. Similarly, the damping resin plate 14 is also inserted on the inner surface side of the face plate 3.

Next, the entire aluminum profile 1 with the damping resin plate 14 inserted therein is placed in a heating furnace and heated. In the case of an aluminum shaped material of an aging treatment type aluminum alloy, a heat treatment for age hardening is required in an intermediate step, and this heat treatment can be shared with a heat treatment for thermally fusing the vibration damping resin. In the case of 6061 alloy, heat treatment is performed at 190 ° C. for 3 hours, for example. Damping resin plate 10 such as modified asphalt or butyl rubber-based special synthetic rubber is 130 to 150 ° C x 20
Since it heat-seals in ~ 30 minutes, heating at a high temperature of 190 ° C
As shown in FIG. 7, it becomes warped and begins to melt rapidly from the surroundings. However, since air escapes inside through the groove 15a of the embossing 15, less air is trapped, and as a result, the adhesiveness of the adhesive surface is improved. Also, groove 1
If there is the through hole 16 at the intersection of 5a, the air is surely released, and the adhesiveness over the entire surface is secured.

A method of using a plastic film or a polyethylene net has already been described as a method for improving the adhesion between the aluminum profile 1 and the damping resin plate 14, but the width of the aluminum profile 1 is about the same. When the damping resin plate 14 is used, a rubber adhesive is applied to the fusion bonding surface side of the damping resin plate 14 in place of the plastic film, and the damping resin plate 14 and the hollow portion of the aluminum profile 1 are joined together. There is also a method of making it adhere to the inner surface.

As described above, the heat treatment is used for both age hardening and heat fusion of the vibration-damping resin plate, so that the heat-damping of the vibration-damping resin plate is performed during a series of processing steps of the aging-treated aluminum alloy. The dressing process can be incorporated. Such as the aging treatment type aluminum alloy, Mg and Si are contained approximately 0.5-1.0 wt%, respectively, Al-Mg-Si system for age hardening by precipitation of the intermediate phase of Mg ₂ Si Aluminum alloy (6000 series) is typical, but Al-Z
An n-type, an Al-Zn-Mg-type, an Al-Zn-Mg-Mn-type, or the like can be used. For this age hardening, for example, 60
In the case of 61 alloy, heat treatment is performed at 170 to 190 ° C. for 3 to 8 hours.

However, the damping resin plate is made of modified asphalt resin, butyl rubber special synthetic rubber, etc.
Heat fusion is performed at 0 to 150 ° C. for 20 to 30 minutes. Then, 170 to 190 ° C. for 3 to 8 hours for age hardening is high temperature, the periphery of the damping resin plate melts first, and air is trapped between the damping resin plate and the inner surface of the hollow portion. Tend to be. Therefore, air escapes through the concave and convex portions of the embossed surface on the bonding side of the damping resin plate, and the bonding between the damping resin plate and the inner surface of the hollow portion is secured. If this uneven pattern is formed by intersecting grooves and a through hole in the thickness direction is provided at the intersection, air that is likely to be trapped is further released through the through hole.

Next, a damping material equivalent to the case where the damping resin plate is used will be described with reference to FIGS. 8 to 12.

In FIG. 8, the vibration-damping profile 20 is formed by integrally forming ribs in the form of a continuous folded plate forming the abdomen of the truss structure with the resin 26 sandwiched between the aluminum members 25 and 27 as described above. It is formed by the damping ribs 24, and the vertical groove 22 is formed on one side.
An aluminum plate 22 having a and an aluminum plate 21 also having a vertical groove 21a on one side thereof are arranged so that the surfaces having the vertical grooves 21a and 22a face each other, and the tops of the respective mountain shapes of the sandwich vibration damping plate 24 are arranged. 27a to the vertical groove 22 of the aluminum plate 22
a, and the troughs 25a of each mountain are formed in the vertical groove 2 of the aluminum plate 21.
It is configured to be adhered so as to fit into 1a.

When vibration from a sound source (on the lower side of the drawing) is applied to such a damping material 20, the aluminum plate 21 is excited to start bending vibration, and its energy is transmitted to the damping rib 24. At this time, when the vibration damping rib 24 is subjected to bending deformation, the resin 26 occupying the intermediate layer of the rib 24 is also subjected to shear deformation, and the vibration energy is efficiently converted into heat energy and is emitted into the space 23. As a result, all the bending vibrations of the damping ribs 24 are suppressed, the vibration energy transmitted to the aluminum plate 22 on the static environment side becomes extremely small, and the sound insulation effect of the entire panel can be enhanced.

The damping profile 30 of FIG. 9 corresponds to the damping profile 20 of FIG.
2 aluminum plates 3 instead of the lower aluminum plate 21
A sandwich damping plate 31 integrally formed by sandwiching a resin 33 between the two and 34 is attached. Further, the upper aluminum plate 22 may also be a sandwich vibration damping plate. Therefore, in this vibration-damping profile 30, when the aluminum plate 32 on the sound source side is excited to start bending vibration, the bending vibration energy is attenuated to some extent while passing through the resin 33, and then transmitted to the rib 24. Therefore, the sound insulation performance obtained by the vibration damping profile 20 of FIG. 8 can be further improved.

Further, as shown in FIG. 10, sandwich vibration damping is integrally formed in the order of a thick aluminum plate 42, a resin layer 43, and a thin aluminum plate 44 in the thickness direction from the sound source side (lower side of the drawing). It is also free to employ the plate 41. With this configuration, the bending rigidity of the thick aluminum plate 42 can be made close to the bending rigidity of the truss structure composed of the thin aluminum plate 44, the sandwich vibration damping plate 24, and the aluminum plate 22. It is possible to increase the strain energy absorbed by locating it close to the neutral axis of the whole. Further, the upper aluminum plate 22 may be made of resin close to the neutral axis, like the sandwich damping plate 41.

Therefore, the resin layer is seen from the neutral axis of the entire panel, as in the vibration damping material 30 of FIG. 9 which uses a so-called equal-thickness aluminum vibration damping plate in which the resin is sandwiched between aluminum plates having the same thickness. The shear strain energy generated in the resin when the entire panel is subjected to bending vibration becomes extremely large compared to the case where it is configured to exist at a relatively distant position. Since the rate of conversion and emission to the outside air also increases, the sound insulation effect of the entire panel can be further enhanced.

FIG. 11 is a modification of FIG.
The protrusions 21a and 22a are provided on the protrusions 21f and 22f to prevent partial reduction in rigidity of the aluminum plates 21 and 22. Similarly, FIG. 12 is a modification of FIG.
By providing a on the ridge 34f, it is possible to prevent a partial reduction in the rigidity of the aluminum plate 34 in the sandwich vibration damping plate 31.

The truss type damping profile has been described above, but the application example of the present invention to the π type damping profile is shown in FIG.
This will be described below.

In FIG. 13, the vibration damping shape material 5 of the present invention is used.
0 is an elongated face plate 51 extending from the front side of the paper to the other side,
The face plate 51 has four convex ribs 52 protruding in the longitudinal direction on one side, and has a sectional shape in which a concave space 55 is formed by the convex ribs 52 and the face plate 51. Then, the damping resin 5 is formed on the lower surface of the recess 55 and on the upper surface of the face plate 51.
3 and a plastic film 54 are stretched. As described above, the vibration damping shape material 50 has a π-shaped cross section, and a plurality of units of this shape are joined in the left-right direction of the paper surface to form the floor, side wall, and ceiling surface of the structure. Since both ends of the face plate 51 are joints, the damping resin 53 is not stretched around the joints 56 so that they do not become an obstacle when joining with the adjacent shaped members by welding or the like.

A method of manufacturing the vibration damping material 50 will be described below. First, aluminum is extruded to form a cross section with the face plate 51 and the rib 52 in a unit of a π shape, or
Alternatively, the aluminum profile is manufactured by welding. Next, the shape member is directly used or a plurality of members are welded and joined to form the recess 55.
The damping resin 53 adhered to the plastic film 54 is inserted from above to heat treatment for age hardening at 150 ° C to 250 ° C. Finally cool. A material that melts at a temperature lower than the age hardening temperature is selected for the damping resin 53, and the damping resin 53 is fused to the face plate 51. It is also possible to insert only the damping resin 53 into the recess 55 without using the plastic film 54. Further, the damping resin may be adhered to one side or both sides of the rib 53.

An example of using the vibration-damping profile 50 and the vibration-damping profile 1 shown in FIG. 1 will be described with reference to FIG. 14 is a cross-sectional view of a structural member of a high-speed railway vehicle, in which the truss type vibration damping material 1 of FIG. 1 is used by being joined to the floor surface, and the side wall and the ceiling of the π type vibration damping shape of FIG. The material 50 is joined and used. In the vibration-damping profile 1, the resin, which is the vibration-damping resin 10, is bent and deformed to absorb vibrations such as motor noise and rolling noise provided on the lower surface side of the floor. Then, vibrations such as motor noise and rolling noise are prevented from being transmitted to the transport structure. Further, when the π-type vibration damping material 50 is used for the ceiling and the side walls, it suppresses high-frequency vibration noises included in high-frequency vibration noises, rolling noises, motor noises, etc. due to cutting the sky during high-speed traveling. Resin 1
0 is absorbed by bending deformation and is less likely to be transmitted to the structure.
As a result, when carrying passengers and the like, it is possible to provide a railway vehicle that is comfortable to ride without giving passengers any discomfort due to noise. Such structural members for transport bodies are not limited to high-speed railway vehicles, but include those used for aircraft, automobiles, high-speed ships, and the like.

Further, the damping characteristics of the above-described damping profile will be described with reference to the graphs of FIGS. For 6061 alloy extruded aluminum profile with the shape shown in Fig. 1,
A modified asphalt resin (thickness: 3 mm, melting temperature: 140 ° C) made by Nippon Special Coating Co., Ltd., 1.0 m deep
Insert the vibration-damping resin plate with the V-shaped groove of m crossing the rhombus into the required location and perform heat treatment for age hardening at 190 ° C x 3 hours, and heat the vibration-damping resin plate at the same time. What was fused was used. 15 is the face plate 3 of FIG.
The damping resin is heat-fused only on the inner surface of the. FIG.
In No. 6, the vibration damping resin is heat-sealed to only one surface of the diagonal rib 4 in FIG. In the case of FIG. 17, as shown in FIG. 1, the damping resin is heat-sealed to the inner surface side of the face plate 3 and one surface of the oblique rib 4. 15 to 17 show, for comparison, an untreated frame member to which the damping resin plate is not heat-sealed. Then, the result of measuring the sound transmission loss with respect to the 1/3 octave frequency is graphed together with the untreated profile.

In FIG. 15, it was confirmed that the one in which the damping resin was heat-fused only to the face plate on the sound source side exhibited the maximum acoustic energy reduction effect of 19 dB as compared with the untreated profile. This reducing effect is comparable to that of the sandwich structure in which the elastic plate is attached to the lower side of the face plate via the viscoelastic resin. That is, it is not necessary to provide an elastic plate on the lower side of the face piece, and a considerable reduction effect can be achieved without increasing the thickness or weight of the shape member.

In FIG. 16, it was confirmed that the one obtained by heat-sealing the damping resin only on one side of the rib exhibited a maximum reduction effect of 23 dB in acoustic energy as compared with the untreated profile. Further, in the case of FIG. 15, there was no effect in the low frequency region of 630 Hz or lower, but in this case,
A reduction effect of 6 dB was recognized even at 00 Hz. This means that in high-speed vehicles, rolling noise and motor noise from the wheels are even harder to transmit.

In FIG. 17, as shown in FIG. 1, the one in which the damping resin of the face plate 3 on the inner surface side and the oblique rib 4 is heat-fused is:
Due to the synergistic effect, up to 33d compared to untreated profile
It was confirmed that the effect of reducing B was exhibited. Above all,
It can be seen that the heat-sealing of the damping resin on one surface of the rib 4 contributes to a better damping effect.

Next, the damping characteristics of the damping profile 50 of FIG. 13 will be described with reference to the graph of FIG. The experiment is shown in FIG.
The measurement was performed by measuring the sound transmission loss for the 1/3 octave frequency as in FIG. The one-dot chain line indicates the thickness of the damping resin attached to the inner surface of the face plate is 2 mm, and the broken line indicates the thickness of the damping resin attached to the inner surface of the face plate is 1.5 mm.
It is a vibration control profile. The untreated profile shows the result of an experiment conducted under the same conditions for the case of only aluminum extruded profile. It can be seen that the vibration damping effect is clearly higher than that of the conventional aluminum extruded shape material in the frequency range of 500 hz or more regardless of the thickness of the vibration damping resin.

By the way, although all of FIGS. 15 to 17 are experimental examples in which the damping resin absorbs acoustic energy by bending vibration, those in which the aluminum foil is stretched on the surface of the damping resin are The damping resin is sandwiched between the rib and the aluminum foil and undergoes not only bending deformation but also slight shearing deformation. Therefore, the absorption rate of acoustic energy may be improved. Therefore, in order to investigate the influence of the presence or absence of aluminum foil, a rectangular plate is cut out from the face plate 3 having a thickness of 3 mm of the aluminum profile shown in FIG. 1, and a damping resin having a thickness of 2 mm is simply applied to one side of the rectangular plate. The first sample, the second sample in which an aluminum foil is applied on the surface of this damping resin, and the third sample, which is a rectangular plate only.
I made a sample. The vibration experiment was carried out while supporting the center of these samples, and the magnitude of attenuation was obtained from the obtained resonance curve. Also, the loss coefficient was calculated by setting the environmental temperature to 20 ° C. and focusing on the third natural frequency. The 3rd natural frequency is 823.1Hz in the 1st sample only of damping resin.
And the loss coefficient is 0.0405, but the third natural frequency is 876.4 Hz in the second sample with aluminum foil.
Therefore, the loss coefficient is slightly increased to 0.0531. In addition, in the third sample which is not stretched, the third natural frequency is 786.1 Hz and the loss coefficient is 0.0012. In this way, when aluminum foil is stretched on the surface of the damping resin,
The loss factor is increasing, and if a plate with higher rigidity than aluminum foil is attached to the surface of the damping resin, or if the damping resin itself is a material that is easily damped by shear deformation, the damping characteristics may be further improved. are doing.

[0046]

According to the vibration-damping material of the present invention, in particular, a truss-type material, the vibration energy transmitted through the ribs is absorbed by a simple structure in which a damping resin or the like is stuck to the inner surface of the hollow portion. Therefore, it is possible to minimize the increase in the weight of the damping material itself and to enhance the sound insulation effect without changing the shape such that the height is increased. Also for the π-type, the sound insulation effect can be similarly enhanced by a simple configuration in which a damping resin or the like is stuck to the inner surface of the concave portion.

Further, in the method of manufacturing the vibration-damping profile of the present invention, it is only necessary to insert the vibration-damping resin plate into the portion to be placed by its own weight and heat it.
Damping resin can be attached to required parts. Also,
In the case of an aged aluminum alloy that requires heat treatment for age hardening, the damping resin can be melted during the aging treatment, and a special heat treatment can be omitted. By using a continuous body in which a large number of rectangular damping resin plates are attached to a plastic film, etc., the damping resin plate can easily be along the ribs or face plates, and the damping resin can be prevented from overlapping or rising. It is possible to exert reliable vibration damping characteristics. Furthermore, even if a plastic film is not used, if unevenness or through holes on the heat-sealing surface of the vibration-damping resin plate are provided, the air on the adhesive surface will escape through these and the adhesion will be improved. It can be secured over a wide range and high damping characteristics can be secured.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a preferable truss type vibration damping shape material according to the present invention.

FIG. 2 is a perspective view showing a method of manufacturing the truss-type vibration-damping shape member of FIG.

FIG. 3 is a partial cross-section of another preferred truss-type damping profile of the present invention.

FIG. 4 is a perspective view showing a method of manufacturing the truss type vibration damping profile of FIG.

FIG. 5 is a diagram showing a partial cross section and a manufacturing method of still another preferable truss type vibration damping profile of the present invention.

FIG. 6 is a perspective view showing a method for manufacturing a truss type vibration damping profile according to still another preferred embodiment of the present invention.

FIG. 7 is a partial cross-sectional view showing still another preferable method for manufacturing the truss type vibration damping profile material of the present invention.

FIG. 8 is a partial cross-sectional view showing still another preferable method of manufacturing the truss type vibration damping profile material of the present invention.

FIG. 9 is a partial cross-sectional view showing still another preferable method of manufacturing the truss type vibration damping profile material of the present invention.

FIG. 10 is a partial cross-sectional view showing still another preferable method for manufacturing the truss type vibration damping profile material of the present invention.

FIG. 11 is a partial cross-sectional view showing still another preferable method for manufacturing the truss type vibration damping profile material of the present invention.

FIG. 12 is a partial cross-sectional view showing still another preferable method of manufacturing the truss type vibration damping profile material of the present invention.

FIG. 13 is a cross-sectional view of a π-type damping profile material of the present invention.

FIG. 14 is a cross-sectional view of a structural member for a high-speed railway vehicle in which the truss-type damping profile and the π-type damping profile of the present invention are used.

FIG. 15 is a graph showing damping characteristics of the truss type damping profile of the present invention.

FIG. 16 is a graph showing the damping characteristics of the truss type damping profile of the present invention.

FIG. 17 is a graph showing the damping characteristics of the truss type damping profile of the present invention.

FIG. 18 is a graph showing damping characteristics of the π-type damping profile material of the present invention.

[Explanation of symbols]

 1 damping shape material 2 and 3 face plate 4 inclined ribs 5 and 6 vertical ribs 7 and 8 and 9 hollow part 10 damping resin 11 plastic film 12 continuum 13 plastic film 14 damping resin plate 15 embossing 15a groove 16 through hole 20, 30 Damping profile 21, 22 Aluminum face plate 24 Damping rib 50 Damping profile 51 Face plate 52 Rib 53 Damping resin 55 Recessed space

 ─────────────────────────────────────────────────── ─── Continuation of front page (31) Priority claim number Japanese Patent Application No. 5-259386 (32) Priority date Hei 5 (1993) September 22 (33) Priority claim country Japan (JP) (72) Inventor Yamaguro Ichiro 1-5-5 Takatsukadai, Nishi-ku, Kobe-shi, Hyogo Kobe Steel Works, Ltd. Kobe Research Institute (72) Inventor Mamoru Taniuchi 1-5-5 Takazukadai, Nishi-ku, Kobe-shi, Kobe Kobe Steel Works, Ltd. Inside Kobe Research Institute (72) Kazuhisa Fujisawa 1-5-5 Takatsukadai, Nishi-ku, Kobe-shi, Hyogo Kobe Steel Co., Ltd. Inside Kobe Research Institute (72) Toshihiko Sasaki 14th Chofu-cho, Shimonoseki City, Yamaguchi Prefecture No. 1 Kobe Steel Co., Ltd. Chofu Factory (72) Inventor Isamu Ueki 14-1 Chofu Minatomachi, Shimonoseki City, Yamaguchi Prefecture Kobe Steel Co., Ltd. Chofu Factory (72) Inventor Rei Sanuki 14-1 Nagafu Minato-cho, Shimonoseki City, Yamaguchi Prefecture Kobe Steel Works, Ltd. Chofu Works (72) Inventor Kenji Maekawa 1-8-2 Marunouchi, Chiyoda-ku, Tokyo Incorporated Kobe Steel Works, Tokyo Head Office (72) Inventor Naofumi Hatayama 1-2-8 Marunouchi, Chiyoda-ku, Tokyo Stock Company Kobe Steel Works, Tokyo Head Office

Claims (4)

[Claims] 1. A vibration-damping profile material, characterized in that the hollow part of the profile material having a hollow part is subjected to a vibration-damping treatment with a vibration-damping resin. 2. A vibration-damping profile, wherein a damping resin is provided on a part or all of the inner surface of the hollow part of the profile having the hollow part. 3. The vibration damping profile according to claim 1, wherein the profile is an extruded profile of a metal containing aluminum as a main component. 4. A structure for a transporting machine, which is constructed by using the damping material according to any one of claims 1 to 3.