JPH0814325A - Vibration proof pad - Google Patents

Abstract

PURPOSE:To provide a vibration proof pad capable of suppressing sudden repulsion upon vibration with acceleration and providing a damping force and an excellent vibration proof effect. CONSTITUTION:A vibration proof pad comprises a first compression plate 1 on one side of which a plurality of protrusions 1a and through holes 1b are formed, a second compression plate 2 on one side of which a plurality of protrusions 2a and through holes 2b are provided so as to be fitted to the first compression plate 1 and a vibration proof pad 3 provided between the first and second compression plates 1 and 2. The first and second compression plates 1 and 2 are synthetic resin plates or resin plates formed by mixing metal powder or inorganic material in synthetic resin and uniformly dispersing them.

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 using a synthetic resin plate and an anti-vibration rubber, and more particularly to an anti-vibration device in which the elastic force of the anti-vibration rubber works uniformly at any position. Regarding pads.

[0002]

2. Description of the Related Art Generally, a vibration-proof rubber plate is used for a vibration-proof pad, especially for a vibration-proof pad on a track, but the problem is that the elasticity of the rubber plate becomes uneven. was there. That is, there is a problem in that the elasticity near the outer periphery of the anti-vibration rubber plate works well (the spring K is low), but the elasticity of the central portion is poor (the spring K is high and hard).
This is because there is no escape area for the rubber during compression, so there is also a track pad that secures an escape area for the rubber by forming a plurality of thin grooves on the upper and lower surfaces of the plate. However, this has a limit in strength and was not sufficient as a countermeasure. In addition, the track pad has a metal plate adhered to the upper portion for protection to improve the sliding property. However, bonding the metal plate, on the other hand, also impairs rubber elasticity, which is also a problem. . By the way, the applicant has already invented an anti-vibration device that exhibits an excellent anti-vibration effect (Japanese Patent Application No. 60-1
No. 73871), this anti-vibration device has an extremely good anti-vibration effect in the vertical direction, but has a drawback that it cannot be used as an anti-vibration pad for a rail (rail) because of its large lateral or lateral vibration. It was The present invention has been made in view of these problems, and it is an object of the present invention to provide an anti-vibration pad that effectively functions even when there is a large amount of lateral vibration and exhibits an excellent anti-vibration effect. To aim.

[0003]

In order to achieve the above object, a vibration-proof pad according to a first aspect of the present invention is provided with a first compression plate having a projection and a through hole on one surface, and a projection and a through hole on one surface. The first
A vibration-damping pad in which a vibration-proof rubber is interposed between a compression plate and a second compression plate that is provided in a mating relationship. The first and second compression plates are synthetic resin plates or synthetic plates. The resin plate is characterized by being formed by mixing metal powder and an inorganic substance in the resin and uniformly dispersing the resin. The vibration-proof pad according to claim 2 is configured by mounting the metal cover on the vibration-proof pad according to claim 1. Here, the synthetic resin plate corresponds to, for example, a polyamide resin, a polyester resin, ABS, or the like. In addition, a resin plate formed by mixing metal powder or an inorganic substance in a synthetic resin and uniformly dispersing it is disclosed in, for example, Japanese Patent Laid-Open No.
The anti-vibration material and the like described in No. 0-130976 are applicable.

[0004]

When the anti-vibration pad receives a load and is deformed, the projection provided on one compression plate compresses the anti-vibration rubber, and a part of the anti-vibration rubber is press-fitted into the through hole of the other compression plate. . afterwards,
When the load is reduced, a part of the press-fitted anti-vibration rubber escapes from the through hole and is restored. Therefore, the rapid repulsive force is suppressed and the damping force works to enable effective vibration isolation.

[0005]

The present invention will be described in more detail based on the following examples. 1 and 2 are schematic views of a vibration-proof pad according to an embodiment of the present invention, showing a non-compressed state (FIG. 1) and a compressed state (FIG. 2), respectively. As shown in the figure, the vibration-proof pad is constructed by interposing a vibration-proof rubber plate 3 between the first compression plate 1 and the second compression plate 2.

As shown in FIG. 3, the first compression plate 1 is provided with projections and through holes extending in, for example, 5 rows and 9 columns. Further, five protrusions 1a and four through holes 1b are alternately provided in the odd-numbered rows, while five through-holes 1b and four protrusions 1a are in the even-numbered rows as an odd-numbered row. It is provided in the opposite phase. In the illustrated case, the projections 1a and the through holes 1b are formed in opposite phases for each row, but this is merely an example, and each row may be formed in the same phase, for example. 3B is a cross-sectional view taken along the line AA and FIG. 3C is a rear view, and the through hole 1b is a through hole. In the case of this embodiment, both the protrusions 1a and the through holes 1b are formed in a cylindrical shape or a circular shape, and these are provided at equal intervals, but the present invention is not limited to the illustrated one, and the size is not limited. , The number, shape and interval are appropriately changed. In the illustrated case, the through hole 1b is formed to have a slightly larger diameter than the projection 1a, but the spring constant can be set lower as the diameter of the through hole 1b is made larger than the diameter of the projection 2. Further, the spring constant can be adjusted by providing a difference in diameter between the protrusions 2 or by providing a height difference between the protrusions 2.

The first compression plate 1 is a synthetic resin or a hard synthetic resin formed by mixing metal powder and an inorganic substance into the synthetic resin and uniformly dispersing them. The material of the first compression plate 1 is not particularly limited, but, for example, Japanese Patent Laid-Open No.
No. 0-130976 interference vibration damping material and the like are suitable. As shown in FIG. 4, the second compression plate 2 is provided with protrusions 2 a and through holes 2 b symmetrically with the first compression plate 1. That is, the through hole 2b is provided at the position of the projection 1a of the first compression plate 1, and the projection 2a is provided at the position of the through hole 1b of the first compression plate 1. The second compression plate 2 is also made of synthetic resin or hard synthetic resin formed by mixing metal powder into synthetic resin. As described above, the vibration-proof pad of FIG. 1 is configured by interposing the vibration-proof rubber plate 3 between the compression plates 1 and 2. In addition,
FIG. 5 illustrates the anti-vibration rubber plate 3, and a known anti-vibration rubber is appropriately selected and used. A in FIG. 1 (b)
As shown in the -A sectional view, the protrusion 1a of the first compression plate 1
Corresponds to the position of the through hole 2b of the second compression plate 2, and the through hole 1b of the first compression plate 1 corresponds to the position of the protrusion 2a of the second compression plate 2.

When the anti-vibration pad receives heavy pressure in such a state, the anti-vibration pad is compressed and deformed as shown in FIG. That is, the protrusions 1a, 2 provided on the compression plates 1, 2
The a is pressed into the upper and lower surfaces of the anti-vibration rubber plate 3 to compress the rubber, and a part 3a of the compressed rubber is pressed into the through holes 1b and 2b formed in the compression plates 1 and 2. After that, when the load is reduced, the part 3a of the rubber press-fitted into the through holes 1b, 2
Escape from b and restore. This effect is a buffering effect,
It is also a feature of the present invention. That is, the through holes 1b and 2b formed in the compression plates 1 and 2 are also escape areas for the compressed rubber.
Generally, when a flat surface of a rubber plate is compressed, the elasticity of the rubber near the outer periphery is soft and the spring constant is low, but the elasticity of the central part of the plate is strong and hard. This is because when the outer peripheral portion of the rubber plate is compressed, it is easy for the compressed rubber to escape, but the resistance to the escape of the rubber increases as it approaches the central portion of the rubber plate. Therefore, there is a drawback that the rubber elasticity is not uniform, but in the present invention, this defect is removed so that uniform elasticity can be obtained at any position of the rubber plate.

FIG. 6 shows a compression plate different from those shown in FIGS. 2 and 3, and illustrates a compression plate 4 which can serve as both the first compression plate 1 and the second compression plate 2. The compression plate 4 is characterized in that, for example, projections and through holes are formed in 5 rows and 8 columns, and the number of columns is an even number. In the case of this embodiment, the number of rows of the projections and the through holes is an even number, the distance between the projections 4a and the through holes 4b is constant, and the compression plate 4 is
Since the left and right end portions have the same length L, it is possible to configure the vibration-proof pad with the same type of compression plates. That is, if the anti-vibration rubber plate 3 is placed on the compression plate 4 of FIG. 6, and the compression plate 4 having the same shape as that of FIG. 6 is reversed and placed on the anti-vibration rubber plate 3, the anti-vibration plate shown in FIG. The equivalent of a shaking pad is constructed. In addition, in FIG. 6, if the number of rows in the vertical direction is formed to be an even number, they can be reversed in the vertical direction and fitted together regardless of the number of columns in the horizontal direction.

As described above with reference to FIGS. 1 and 6,
In the present invention, the projections 1a and 2a and the through holes 1b and 2b provided on the compression plates 1 and 2 are fitted and integrated from both sides of the anti-vibration rubber plate, and one rubber plate 3 is provided on both sides. It is configured so that it can be tied together and utilize its elasticity. Therefore, since the height of the pad can be made lower than that of the vibration isolation device of Japanese Patent Application No. 60-173871, the vibration isolation effect against lateral swaying is greater. In other words, this anti-vibration pad removes the defects of the conventional pad and exhibits an extremely excellent anti-vibration effect.

FIG. 7 shows a pad constructed as shown in FIG.
9 illustrates a vibration-proof pad 6 that is housed in a box-shaped metal cover 5 (see FIG. 8). As is clear from FIG. 7, a metal cover 5 is put on a laminated body of the first compression plate 1, the vibration-proof rubber plate 3, and the second compression plate 2 to form the vibration-proof pad 6 with the metal cover. And this vibration-proof pad 6 is used suitably for a slab track.

FIG. 9 shows a case where the vibration-proof pad 6 shown in FIG. 7 is applied to a slab track. Generally, the slab track forms concrete slab 10 on the bridge and asphalt mortar 11 on it, as shown in FIG.
A rubber mat 12 and a concrete block 13 are installed, a rail mounting bracket (tie plate) 14 is attached, and a variable pad 15 (for level) is placed on the tie plate 14.
The vibration-proof pad 6 of the present invention is laid on the rail 16, and the rail 16 is installed and pressed by a spring to be fixed. When a train runs on a track, vibration due to heavy load is in the vertical direction, but the rail expands and contracts because force is applied in the traveling direction. Therefore, the upper surface of the vibration-proof pad 6 may be scraped by the expansion and contraction movement of the rail, and the pad combination may be misaligned. When using it for vibration isolation of general power machinery,
It can be fixed through the mounting bolts, but not on track pads. Therefore, by using the metal cover 5, the anti-vibration pad 6 capable of eliminating the above-mentioned defects is extremely effective.

[0013]

As described above, the vibration-proof pad of the present invention has the first compression plate having a plurality of projections and through holes alternately provided on one surface, and the first compression plate having the projections and through holes on one surface. An anti-vibration rubber is interposed between the second compression plate and the second compression plate that is fitted in the plate. Therefore, the elasticity of the anti-vibration rubber plate acts uniformly by the function of the projections and the through holes provided on the compression plate, and the anti-vibration rubber press-fitted into the through holes gently escapes when the load is reduced and the sudden repulsive force is increased. To attenuate. That is, the vibration-proof pad of the present invention has a structure that imparts a damping force. In the case of a slab track, the current situation is that it is extremely difficult to take vibration-proof measures because of the violent generation of vibration noise. Has the ability to

[Brief description of drawings]

FIG. 1 is a diagram showing a perspective view (a) and an AA cross-sectional view (b) when an anti-vibration pad according to the present invention is in a non-compressed state.

FIG. 2 is a perspective view (a) and an AA sectional view (b) when the vibration damping pad of FIG. 1 is in a compressed state.

3A is a perspective view of the first compression plate, FIG. 3B is a sectional view taken along the line AA of FIG. 3B, and FIG.

FIG. 4 is a perspective view (a), a cross-sectional view taken along line AA (b) and a rear view (c) of a second compression plate.

FIG. 5 shows a plan view (a) and a sectional view (b) of a vibration-proof rubber plate.

FIG. 6 illustrates another embodiment of the compression plate.

FIG. 7 illustrates a vibration isolation pad with a metal cover.

FIG. 8 illustrates a metal cover.

9 is a view showing a use state of the vibration-proof pad of FIG.

[Explanation of symbols]

1 1st compression plate 2 2nd compression plate 1a, 2a Protrusions 1b, 2b Through hole 3 Anti-vibration rubber plate 4 Other compression plates which were made to fit two compression plates in reverse 5 Metal cover 6 Metal Anti-vibration pad with cover

 ─────────────────────────────────────────────────── ─── 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 first compression plate having a projection and a through hole on one surface of a synthetic resin plate or a resin plate formed by mixing metal powder or an inorganic substance into a synthetic resin and uniformly dispersing the resin plate, and the resin plate. An anti-vibration pad is interposed between a second compression plate having a projection and a through hole formed on one surface of the first compression plate so as to fit with the first compression plate. 2. An anti-vibration pad, wherein the anti-vibration pad according to claim 1 is equipped with a metal cover.