JPH0814327A - Vibration proof pad - Google Patents

Abstract

PURPOSE:To improve the vibration proof effect of an interfering vibration proof material and to realize the vibration isolation and sound insulation of a concrete slab track or the like by laminating a plurality of vibration proof plates and fitting a metal cover formed in a box shape to the upper surface of the vibration proof plate located at the uppermost part. CONSTITUTION:A vibration proof pad P1 comprises first to third laminated vibration proof plates 1 to 3 and a metal plate cover 4 with which the first vibration proof plate 1 is covered. The vibration proof plates 1 to 3 are formed out of a hard synthetic resin formed by mixing and uniformly dispersing metal powder or inorganic material in a synthetic resin. Cylindrical recessed parts are formed at four corners of the vibration proof plate 3. When the vibration proof pad P1 is applied to the concrete slab track, the vibration proof pad P1 is mounted on a variable pad 11 installed on a stay plate 10 and a rail 12 is laid thereon so that a heater internally mounted on the variable pad 11 is turned on. Thus, a resin forming the variable pad 11 is heated and softened and a part of the softened resin is fitted into the recessed parts of the vibration proof plate 3 so that a vibration proof effect is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-vibration pad used for a slab track or the like, and in particular, it does not utilize the buffering effect of the elasticity of rubber, but converts the vibration energy into heat energy to damp the vibration. The present invention relates to an anti-vibration pad.

[0002]

2. Description of the Related Art A vibration damping pad for damping vibration by molecular motion, that is, for converting vibration energy into heat energy to damp the vibration is disclosed in, for example, Japanese Patent Application No. 49-3.
There is an interference vibration isolator described in Japanese Patent No. 7130, and it is known that this interference vibration isolator has an extremely large vibration isolation effect. Explaining the anti-vibration effect based on the experimental measurement value, the dumbbell for measurement formed by the interference anti-vibration material is excited by the vibration accelerator, and the vibration waveform (damping waveform) is taken on an oscillograph,
When the value of the logarithmic decay rate δ is measured, the logarithmic decay rate is δ =
255 × 10 ⁻³ = 0.255, which corresponds to a vibration damping force of 500 times that of iron or aluminum. This effect is exhibited because the vibration damping material converts vibration energy into heat energy, and its action mechanism is
This is based on the viscous component of viscoelasticity peculiar to a substance. When an external vibrational force is applied to the damping material, it is converted into heat energy and the damping material generates heat. Therefore, the measurement method based on this heat energy, that is, tan δ, is also a measure of energy consumption efficiency. The value of tan δ that is effective as a damping material is tan
Since δ> 0.1, the antivibration capacity of this interference vibration isolator [ta
The size of n (0.255) = 0.26] is remarkable.

[0003]

When the severity of the orbital vibration is examined, the vibration of the slab orbit is particularly strong, and it is so strong that it induces several times the vibration energy of the sleeper orbit of the ballast mat. . On the other hand, the sleeper track of the ballast mat has a large vibration-proof effect, but since the repair management of the ballast and the level adjustment of the rail must be frequently constructed, the time and labor required for the construction are immeasurable. Therefore, it is desirable to use a slab track that is easy to manage and repair, but as mentioned above, it is extremely difficult to take measures against vibration and noise. Therefore, it has been earnestly desired to complete a vibration damping pad that can solve this problem. The present invention has been made based on such an actual situation, and provides an antivibration pad capable of further enhancing the antivibration effect of the above-mentioned interference antivibration material and achieving complete antivibration and soundproof measures such as a slab track. The purpose is to do.

[0004]

In order to achieve the above object, a vibration-proof pad according to the present invention has a structure in which a plurality of vibration-proof plates are laminated and the first vibration-proof plate is located at the uppermost position. A vibration-proof pad having a box-shaped metal cover fitted with a metal plate, wherein (1) the plurality of vibration-proof plates are each made of a hard synthetic resin plate, and (2) the first The vibration isolator has an upper surface formed in a flat surface and a lower surface formed in a corrugated surface. (3) The second vibration isolation plate located below the first vibration isolation plate is the first vibration isolation plate. The corrugated surface of the vibration plate has an upper surface formed on the corrugated surface of the same phase and a lower surface formed on the flat surface,
(3) The third vibration-isolating plate located at the bottom has a lower surface that is formed in a flat surface and has a recess in a part thereof. The hard synthetic resin plate is not particularly limited, but a synthetic resin mixed with metal powder or an inorganic substance and uniformly dispersed is preferable. Particularly, the interference vibration isolation described in Japanese Patent Application No. 49-37130 is preferable. Wood is preferred. Further, the number of the vibration-proof plates is not particularly limited, but it is typically three. In addition, as in claim 2,
A slippery coating made of a material having good sliding property such as silicon or graphite may be provided between the first vibration-proof plate and the second vibration-proof plate.

[0005]

[Operation] In addition to the anti-vibration effect of multiple anti-vibration plates,
The relative movement between the anti-vibration plate and the second anti-vibration plate provides more effective anti-vibration capability. That is, the vibration-proof ability is further enhanced by the corrugated surfaces of the first and second vibration-proof plates.

[0006]

The present invention will be described in more detail based on the following examples. FIG. 1 is a perspective view of a vibration-proof pad P1 which is an embodiment of the present invention. This vibration-damping pad P1 is formed by stacking a first vibration-damping plate 1, a second vibration-damping plate 2, and a third vibration-damping plate 3, and then stacking the metal shown in FIG. It is configured by covering the plate cover 4. Anti-vibration material 1,
2 and 3 are formed by a hard synthetic resin in which a metal powder or an inorganic substance is mixed in a synthetic resin and uniformly dispersed, but it is preferable that the interference vibration isolator (hereinafter, simply referred to as Japanese Patent Application No. 49-37130) Interference damping material) is used.

FIG. 3 shows a first anti-vibration plate 1 and a second anti-vibration plate 2.
And a third vibration-proof plate 3 are stacked on each other in plan view (a) and A
3A is a cross-sectional view taken along the line A of FIG. 4 and 5 are perspective views of the first vibration isolation plate 1 and the second vibration isolation plate 2. As shown in the figure, the first anti-vibration plate 1 has a flat surface portion 1a and a curved surface portion 1b.
b is formed in a gentle corrugated surface (FIG. 3).
(B), FIG. 4). The first vibration isolation plate 1 is formed to have a lateral width slightly smaller than that of the other vibration isolation plates 2 and 3. Second
The vibration-proof plate 2 is substantially similar to the first vibration-proof plate 1 and has a flat surface portion 2a and a curved surface portion 2b, and the curved surface portion 2b is formed in a gentle wavy surface. However, the corrugated surface 2b of the second vibration isolating plate 1 is formed in the same phase as the corrugated surface 1b of the first vibration isolating plate 1, so that the two corrugated surfaces 1b and 2b are fitted exactly. (Fig. 3 (b)).

FIG. 6 is a back view (a) and B of the third vibration isolation plate 3.
3B is a view showing a cross-sectional view (b) of FIG.
Is a flat first flat surface 3a and a second flat surface 3 having a recess 5.
b. In the case of this embodiment, the cylindrical recesses 5 having the same shape are regularly formed at the four corners of the second plane 3b. The three vibration-damping plates 1, 2, 3 formed as described above are stacked in three layers, and the vibration-damping pads P1 are fitted on the metal plate cover 4 formed in a box shape from above.
Is completed. In addition, the depth L of the edge portion 4a of the metal plate cover 4 is formed to be slightly shallower than the total value of the thicknesses of the three vibration damping plates 1, 2, and 3 (FIG. 1).

Next, the case where the vibration-proof pad P1 is used for a slab track will be described. As shown in FIG. 7, the antivibration pad P1 of the present invention is placed on the variable pad 11 installed on the tie plate 10, the rail 12 is placed on the antivibration pad P1, and the heater installed in the variable pad 11 is energized. Then, the resin forming the variable pad 11 is heated and softened, the rail 12 sinks due to its own weight, and a part of the softened resin is formed in the concave portion 5 provided on the lower surface portion of the third vibration isolating plate 3. Fit inside. When the rail 12 reaches a predetermined level position, the energization is stopped (switch is turned off), so that the resin is hardened when the heater built in the resin plate is stopped. At this time, the resin fitted in the concave portion 5 hardens and serves as a stopper to fix the vibration-proof plate. When the rail reaches a predetermined level position, a spring for fixing the rail may be tightened and fixed.
The anti-vibration plate uses a resin having heat resistance higher than that of the variable pad.

When the train runs on the track formed and installed as described above, a shock wave is generated due to the heavy load of the train, wheels rotating at high speed, and fine irregularities on the rail surface.
The acceleration vibration energy of this shock wave is strong, but the vibration-proof pad P1 can strongly attenuate the vibration by receiving this acceleration vibration. It is this anti-vibration pad P1
The anti-vibration plates 1, 2 and 3 constituting the above are formed of an interference anti-vibration material having a remarkable anti-vibration force, and the corrugated curved surfaces 1b and 2b are fitted on one surface of the anti-vibration plates 1 and 2. This is because they are combined and laminated. When the train runs, the vibration accompanied by the heavy load acts not only in the vertical direction of the rail 12 but also in the traveling direction, so that the rail 12 expands and contracts in the traveling direction. The force required for this movement is the wavefront shape 1b, 2 formed on the vibration isolation plates 1, 2.
distributed by b. Further, since the first vibration isolation plate 1 located at the upper portion is formed to have a slightly shorter length in the rail traveling direction than the other vibration isolation plates 2 and 3 located at the lower portion (FIG. 1),
When a component force in the traveling direction acts on the rail 12, the first vibration isolation plate 1 moves in that direction. When the first anti-vibration plate 1 moves, the first
It rides on the high wave portion of the vibration isolator 2 and restores as the wheels pass. The consumption of energy required for this movement becomes the vibration damping force. Further, the vibration-damping force increases as the vibration-damping material is laminated. This is because the surface damping effect works. As described above, the antivibration pad P1 has the synergistic effect such as the antivibration force of the synthetic resin (interference antivibration material), the antivibration effect of the waveform formed on the antivibration plate, and the surface damping effect of the lamination. Then, the anti-vibration effect increases exponentially to exert a strong anti-vibration effect.

FIG. 8 is a sectional view showing a vibration-proof pad P2 which is another embodiment of the present invention. The anti-vibration pad P2 is characterized in that the slippery coating 6 is interposed between the first anti-vibration plate 1 and the second anti-vibration plate. That is, the first anti-vibration plate 1, the slip coating 6, the second anti-vibration plate 2, and the third anti-vibration plate 4
The metal plate cover 4 having the same shape as that of FIG. 2 is covered on the layered product. For the sliding member 6, a material having good sliding characteristics such as silicon or graphite is selected.
The materials and shapes of the vibration damping plate 1, the second vibration damping plate 2, and the third vibration damping plate 3 are the same as those in the embodiment of FIG. This anti-vibration pad P2
When the track is used as a track, the violent shock wave generated by the heavy load of the train and the high-speed rotation of the wheels and the strong vibration energy associated with the acceleration vibration cause the interference of the anti-vibration materials that form the vibration-isolating plates 1, 2, and 3. Damped by the effect. In addition, the anti-vibration plate 1,
The anti-vibration plates 1 and 2 slide on each other by the lubricous coating 6 interposed between the anti-vibration plates 1 and 2. When sliding, the load pressure is dispersed and the acceleration vibration is attenuated. Therefore, a synergistic effect of these causes an extremely strong vibration damping effect.

[0012]

As described above, the anti-vibration pad according to the present invention is typically one in which three anti-vibration plates are laminated and a metal cover is fitted therein. A vibration plate and a second vibration isolation plate having a corrugated surface corresponding to the vibration plate are provided. Therefore, the vibration damping effect is exerted by each of the laminated vibration damping plates, and the vibration damping force is exerted more strongly by the relative movement between the first and second corrugated surfaces. Is extremely large.

[Brief description of drawings]

FIG. 1 is a perspective view of an anti-vibration pad according to an embodiment of the present invention, in which a metal plate cover is partially broken.

FIG. 2 is a perspective view of a metal plate cover.

FIG. 3 illustrates a laminated structure of a vibration isolation plate.

FIG. 4 illustrates a first vibration isolation plate.

FIG. 5 illustrates a second vibration isolation plate.

FIG. 6 is a diagram showing a back view (a) and a BB cross-sectional view (b) of a third vibration isolation plate.

FIG. 7 is a view schematically showing a use state of a vibration isolation pad.

FIG. 8 is a sectional view showing a vibration-proof pad which is another embodiment of the present invention.

[Explanation of symbols]

 1 1st antivibration board 2 2nd antivibration board 3 3rd antivibration board 4 metal plate cover 5 recessed part of 3rd antivibration board 6 lubricant film

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Masanori Yodogawa 3-15-1 Sotokanda, Chiyoda-ku, Tokyo Within Ryobi Co., Ltd. (72) Inventor Shoji Takahashi 3-15-1 Sotokanda, Chiyoda-ku, Tokyo Ryobi Co., Ltd. (72) Inventor Kazunobu Ogawa 3-15-1 Sotokanda, Chiyoda-ku, Tokyo Ryobi Co., Ltd.

Claims (2)

[Claims] 1. A vibration-proof pad comprising a plurality of vibration-proof plates laminated together, and a metal cover having a box-shaped metal plate fitted therein from the upper surface of a first vibration-proof plate located at the top. , The plurality of vibration damping plates are each formed of a hard synthetic resin plate, and the first vibration damping plate has an upper surface formed in a flat surface and a lower surface formed in a corrugated surface, The second anti-vibration plate located below the first anti-vibration plate has an upper surface formed on a corrugated surface in phase with the corrugated surface of the first anti-vibration plate and a lower surface formed on a flat surface. The vibration-damping pad is characterized in that the third vibration-isolating plate located at the lowermost portion has a lower surface that is formed on a flat surface and has a recess in a part thereof. 2. The anti-vibration pad according to claim 1, wherein a slippery coating made of a material having good sliding property such as silicon or graphite is provided between the first anti-vibration plate and the second anti-vibration plate.