JP2001140983A - Vibration controlling and shock absorbing pad - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration controlling and shock absorbing pad having sufficient vibration absorbing performance for horizontal vibration and vertical vibration and allowing stable installation of equipment. SOLUTION: This vibration controlling and shock absorbing pad 1 is used by combining an upper absorbing pad 2 and a lower absorbing pad 3 so that protrusions 24 (24a to 24d) and fitting holes 34 (34a to 34d) may be loosely fitted to each other. The widths of clearances formed between the protrusions 24 and the fitting holes 34 are different from each other. When both absorbing pads 2, 3 are relatively displaced, the more protrusions 24 are brought into contact with the wall surfaces of the fitting holes 24 the larger the deformation amount is, to generate larger restoring force and resilience.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-vibration / shock absorbing pad which is sandwiched between two objects and prevents transmission of vibration or shock generated by one object to the other object.

[0002]

2. Description of the Related Art Influences of vibration such as injection molding machines and the like which generate vibrations and shocks (hereinafter collectively simply referred to as "vibrations etc.") and electronic balances which perform precise weight measurement have been conventionally used. When installing equipment that is susceptible to vibration, to prevent vibrations generated by the equipment from being transmitted to the surroundings, and conversely, vibrations generated from the surroundings to be transmitted to the equipment,
2. Description of the Related Art An anti-vibration pad formed of an elastic material in a plate shape is interposed between a device and a mounting surface (floor, desk, or the like) of the device.

By the way, this type of vibration-proof pad includes a vibration-absorbing pad that mainly absorbs lateral vibrations and the like (hereinafter, referred to as “lateral vibration”) along the above-mentioned equipment and a contact surface with a mounting surface. There is a shock absorbing pad that mainly absorbs vertical vibrations and the like along a direction intersecting the contact surface (hereinafter referred to as “longitudinal vibration”).

Among these, the vibration absorbing pad P1 for absorbing lateral vibration is formed in a flat plate shape having a plurality of projections P12 on the surface (contact surface with an object), for example, as shown in FIG. It is made of an elastic body. Then, when a lateral vibration occurs on either the device P8 or the mounting surface P9 that sandwiches the vibration absorbing pad P1, and a lateral load is applied to the vibration absorbing pad P1, the contact surface is in accordance with the load. The formed projection P12 swings. At this time, the restoring force of the projection P12 (elastic force for returning to the original shape) attenuates the swing, thereby absorbing the applied load, that is, the lateral vibration.

On the other hand, a shock absorbing pad P for absorbing longitudinal vibration
7 are, for example, as shown in FIG. 7B, different in elasticity and used by lamination, and furthermore, irregularities (triangular edges in the figure) having a meshing shape are formed on the lamination surface. And a pair of elastic members P20 and P22.

When a longitudinal vibration is generated in either the device or the mounting surface sandwiching the shock absorbing pad P2 and a vertical load is applied to the shock absorbing pad P2, the load is reduced by the elastic member P20. , P22 in the stacking direction. At this time, by dispersing the load transmission direction on the laminated surface formed in the unevenness, the load reaching the counterpart device or the mounting surface is weakened, that is, the longitudinal vibration is absorbed.

[0007]

However, these conventional vibration absorbing pads P1 and shock absorbing pads P2 can sufficiently absorb vibrations in the above-described specific directions, respectively.
The vibration in a direction other than the specific direction, that is, the vibration absorbing pad P1
In this case, the longitudinal vibration and the shock absorbing pad P2 could not effectively absorb the lateral vibration. For this reason, when it is required to deal with both the horizontal vibration and the longitudinal vibration, there is a problem that the conventional vibration absorbing pad P1 and the shock absorbing pad P2 cannot sufficiently cope with the problem.

Particularly, in the vibration absorbing pad P1, the device P8
And the contact surface P9 via the projection P12, and the contact area is small, so that there is a problem that the device P8 and the placing surface P9 slip. By using a low-hardness elastic material, the device P8
It is conceivable to prevent slip by increasing the contact area between the pad P1 and the mounting surface P9. Because it becomes unstable, the device P8
A new problem arises in that it is not possible to stably install the device.

Accordingly, an object of the present invention is to provide a vibration-proof / shock-absorbing pad which has a sufficient vibration absorbing performance for both horizontal vibration and longitudinal vibration and can stably install the equipment. And

[0010]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention provides a vibration-isolating / shock-absorbing pad comprising a plurality of plate-like elastic members laminated on each other. On the surface, a plurality of loose fitting pairs each formed of a projection and a fitting hole which are loosely fitted to each other at the time of lamination are formed, and the loose fitting pairs are formed between the elastic members generated when an external load is applied. It is characterized in that the larger the displacement, the larger the contact area between the wall surface of the fitting hole and the projection is formed.

In the vibration-absorbing / shock-absorbing pad of the present invention thus constructed, vibration or impact occurs on one of the elastic members, and a load is applied to the vibration-absorbing / shock-absorbing pad due to the vibration or the like. When a displacement occurs between them, as the displacement increases, the contact area between the wall surface of the fitting hole and the projection (hereinafter, referred to as “the contact area of the loose fitting pair”) increases. Then, as the contact area increases, the restoring force (repulsive force for preventing the displacement of the elastic member) for returning from the displaced state to the original state increases.

That is, according to the vibration-proof / shock-absorbing pad of the present invention, a restoring force / repulsive force corresponding to the magnitude of the applied load can be obtained, so that the vibration or the like that caused the load can be effectively absorbed. be able to. In addition, in the vibration-proof and shock-absorbing pad of the present invention, the contact surface that contacts the device or the mounting surface of the device,
There is no need to provide a projection like the conventional vibration absorbing pad P1, and a large contact area with the device and the mounting surface can be ensured. Therefore, sufficient surface friction resistance can be obtained without lowering the hardness of the elastic member more than necessary. can get. Therefore, according to the vibration-proof / shock-absorbing pad of the present invention, it is possible to surely prevent slippage of these devices and the mounting surface while ensuring sufficient dimensional accuracy in the thickness direction of the pad.

By the way, as the deformation of the elastic member becomes larger,
Specifically, the shape of the loose fitting pair such that the contact area between the wall surface of the fitting hole and the projection is increased is, for example, the following claim 2 or 3
This can be realized by configuring as described. That is, as described in claim 2, in the loose fitting pair, in the gap formed between the wall surface in the fitting hole and the projection, the interval between the portions facing each other in the load application direction is loose. What is necessary is just to form so that it may each have a different area for every fitting pair.

In this case, as the relative displacement between the elastic members increases, the number of loose fitting pairs that contact each other increases, so that the contact area of the loose fitting pairs increases.
More specifically, the diameter and depth of the fitting hole are constant in all the loose fitting pairs, and the diameter and height of the projections are different for each loose fitting pair. To keep the diameter and height of the projection constant,
This can be realized by making the diameter and depth of the fitting hole different for each loose fitting pair. Of course, both the fitting hole and the projection may be formed to have different diameters and different depths / heights for each loose fitting pair.

Further, as described in claim 3, the loose fitting pair is
Of the gap formed between the wall surface in the fitting hole and the protrusion, the interval between the portions facing each other in the direction of load application is
The projection may be formed in a shape that gradually spreads from the root portion to the tip portion. In this case, as the relative displacement in the lateral direction along the lamination surface between the elastic members increases, the portion where the wall surface of the fitting hole and the projection contact each other in each loose fitting pair increases. As a result, the contact area of the loose fitting pair increases as a whole.

More specifically, it can be realized by forming one of the wall surface of the fitting hole and the side surface of the projection so as to be inclined, or by forming them so that the inclination angles thereof are different from each other. Next, in the vibration-proof / shock-absorbing pad according to claim 4,
The vibration-damping / shock-absorbing pad according to any one of claims 1 to 3, wherein the elastic member has an elastic force different from that of another adjacent layer.

In this case, the elastic member is formed by the interaction between the above-described longitudinal vibration absorbing function of the conventional shock absorbing pad and the longitudinal vibration absorbing function based on the gradually increasing contact area of the loose fitting pair. Longitudinal vibration along the lamination direction can be more effectively absorbed.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. Anti-vibration / shock absorbing pad 1 of the present embodiment
Is a pair of absorbent pads 2 and 3 used in a stacked state.
For convenience, one is called the upper absorbent pad 2 and the other is called the lower absorbent pad 3.

Here, FIG. 2A is a plan view of the upper absorbent pad 2 as viewed from the lamination surface side with the lower absorbent pad 3, and FIG.
2B is a cross-sectional view taken along the line AA ′, FIG. 2C is a cross-sectional view taken along the line BB ′, and FIG. FIG. 3A is a plan view of the lower absorbent pad 3 as viewed from the lamination surface side with the upper absorbent pad 2, and FIG.
3 is an aa ′ sectional view, FIG. 3C is a bb ′ sectional view, FIG.
(D) is an explanatory view showing a part of the lamination surface in an enlarged manner.

First, the upper absorbent pad 2 is shown in FIGS.
As shown in (d), it is formed in a plate shape having a square planar shape, and on one surface thereof, a large number of projections 24 projecting in a columnar shape are formed, and the periphery of the surface is formed. A weir 26 is formed at the edge.

Specifically, the projections 24 are of four types having different diameters and heights (a first projection 24a and a second projection 24a).
(Referred to as projection 24b, third projection 24c, and fourth projection 24d).
The first protrusion 24a has the largest diameter, the second protrusion 24b, the third protrusion 24c, and the fourth protrusion 24d have smaller diameters in this order, and the height has the first protrusion 24a.
The projection 24a is the lowest, and the height is increased in the order of the second projection 24b, the third projection 24c, and the fourth projection 24d.

When attention is paid to the row of projections arranged in the horizontal direction in the figure, a row in which the first projections 24a and the fourth projections 24d are alternately arranged linearly (see FIG. 2B), When the rows in which the projections 24b and the third projections 24c are alternately arranged in a straight line (see FIG. 2C) are alternately arranged, and when attention is paid to the projection row arranged in the vertical direction in the figure, the first Protrusion 24a
And a row in which the second projections 24b are linearly and alternately arranged;
The rows in which the third protrusions 24c and the fourth protrusions 24d are alternately arranged linearly are arranged alternately. That is, FIG.
As shown in (d), the center points of the projections 24a to 24d are regularly arranged so as to be located on a scattered grid.

On the other hand, the lower absorbent pad 3 is shown in FIGS.
As shown in (d), it is formed in a plate shape having the same size and the same planar shape (that is, square) as the upper absorbent pad 2, and the diameter of the opening is formed on one surface thereof. Fitting hole 3 dug into a truncated cone to be larger than
4 are formed in large numbers.

The fitting holes 34 are, specifically, four types having different hole diameters and depths (first fitting holes 34a, 34a).
Second fitting hole 34b, third fitting hole 34c, fourth fitting hole 34
d), and regarding the hole diameter, the first fitting hole 34a
The second fitting hole 34b, the third fitting hole 3
4c and the fourth fitting hole 34d in this order, and the first fitting hole 34a has the smallest depth.
The fitting hole 34b, the third fitting hole 34c, and the fourth fitting hole 34d are configured to be deeper in this order.

When attention is paid to the rows of fitting holes arranged in the horizontal direction in the figure, the rows in which the first fitting holes 34a and the fourth fitting holes 34d are alternately arranged in a straight line (FIG. 3B) (See FIG. 3 (c)), and rows (see FIG. 3 (c)) in which the second fitting holes 34b and the third fitting holes 34c are linearly and alternately arranged.
In addition, when attention is paid to a row of fitting holes arranged in the vertical direction in the drawing, a row in which the first fitting holes 34a and the second fitting holes 34b are linearly and alternately arranged, and the third fitting holes 34c and 34c. Fourth fitting hole 34
The rows in which d are alternately arranged in a straight line are alternately arranged. That is, as shown in FIG.
The center points of a to 34d are regularly arranged so as to be located on a scattered grid having the same size as the projections 24a to 24d.

In the following, in the upper absorbent pad 2 and the lower absorbent pad 3, the surface on which the projection 24 and the fitting hole 34 are formed is referred to as the laminated surfaces 22, 32, and the surface on the opposite side is referred to as the external contact surface. In addition, the two absorption pads 2 and 3 are stacked on each other.
When the first and second projections 24a and 32 face each other, the first projection 24a and the first fitting hole 34a, the second projection 24b and the second fitting hole 34b, the third projection 24c and the third fitting hole 34c, and the fourth projection 24d The fourth fitting holes 34d are arranged so as to face each other. Hereinafter, a pair of the facing projections and the fitting holes will be referred to as first to fourth loose fitting pairs, respectively.

Then, in the fourth loosely-fitted pair 24d, 34d,
The diameter of the projection and the diameter of the bottom of the fitting hole are formed to have the same size. Hereinafter, the size obtained by subtracting the diameter of the projection from the diameter of the bottom of the fitting hole is the third loosely fitting pair 24c, 34c. ,
2nd loose fitting pair 24b, 34b, 1st loose fitting pair 24a, 34a
In the order of.

The upper absorbent pad 2 and the lower absorbent pad 3 are integrally formed of an elastic material (for example, butyl rubber), and the upper absorbent pad 2 is made of an elastic material having a hardness of A10 of JIS K6301. The lower absorbent pad 3 has a hardness of JIS A6.
An elastic material of A35 of 301 is used. Preferably, the material hardness and the supporting area should be selected so that the distortion of 24d (the thinnest projection at the top) is 0.1 or less when the object (device) is installed.

The upper absorbent pad 2 configured as described above
The lower absorbent pad 3 and the lower absorbent pad 3 are combined in a state where the lamination surfaces 22 and 32 are opposed to each other and each loose fitting pair is positioned so as to oppose each other. The vibration-proof / shock-absorbing pad 1 of the present embodiment is manufactured by adhering to the periphery of the absorbing pad 3. Note that the weir portion 26 is provided with the two absorbent pads 2 and 3
This is for preventing dust and the like from entering through the gap.

The anti-vibration and vibration control of the present embodiment thus configured
For example, as shown in FIG. 1, when the electronic scale D for performing very precise weight measurement is mounted on the mounting table, the shock absorbing pad 1 is placed between the electronic scale D and the mounting surface of the mounting table. It is used by sandwiching it. Here, the vibration-proof / shock-absorbing pads 1 of the present embodiment are arranged at the four corners of the electronic balance D, respectively.

Here, FIG. 4 shows a vibration damping / shock absorbing pad 1.
FIG. 4A is a cross-sectional view of FIG.
FIGS. 3A and 3B show cross sections of portions corresponding to the A ′ cross section and the aa ′ cross section, respectively.
It shows a cross section of a portion corresponding to the b ′ cross section.

As shown in FIG. 4, when no load is applied to the vibration-proof / shock-absorbing pad 1, the tip of the fourth projection 24d is brought into contact with the bottom of the fourth fitting hole 34d. 24a to 24d are fitting holes 34a to 34d, respectively.
Is loosely fitted. At this time, in each loose fitting pair, a gap formed between the projection and the bottom or side wall of the fitting hole is:
The fourth loosely-fitted pair 24d, 34d is the narrowest (abuts at the bottom), the third loosely-fitted pair 24c, 34c, and the second loosely-fitted pair 2
4b, 34b and the first loosely-fitted pairs 24a, 34a in this order.

Next, the operation when a horizontal load is applied along the external contact surface and a vertical load intersecting the external contact surface are applied to the vibration-proof / shock-absorbing pad 1 of this embodiment. The operation in this case will be described. However, FIG. 5 and FIG. 6 are not actual cross-sectional views, and the second
It is the schematic diagram which showed the 4th loose fitting pair side by side. In particular, FIG. 5 shows a case where a load is applied to the external contact surface of the upper absorbent pad 2.

First, FIG. 5A shows a state before a lateral load is applied to the vibration-proof / shock-absorbing pad 1. Then, when a lateral load is applied to the upper absorbent pad 2 and the upper absorbent pad 2 is displaced in the lateral direction with respect to the lower absorbent pad 3, as shown in FIG. The fourth protrusion 24d abutting on the bottom of the first member starts elastic deformation, and the fourth protrusion 24d deforms with the displacement so as to be pressed against the side wall of the fourth fitting hole 34d,
The contact area between the two increases. At this time, the other first to third
Even in the loose fitting pair, the projection moves in the fitting hole, and among these,
The third protrusion 24c first contacts the side wall of the third fitting hole 34c.

When the upper absorbent pad 2 is further displaced from this state, as shown in FIG. 5C, the third protrusion 24c abutting on the side wall of the fitting hole 34c starts elastically deforming, and the fourth fourth pad 24c starts to deform. Similarly to the protrusion, the third protrusion 24c is deformed so as to be able to be pressed against the side wall of the third fitting hole 34c in accordance with the displacement of the upper absorbent pad 2, and the contact area between them is increased. During this time, the fourth protrusion 24d is pressed against the side wall of the fourth fitting hole 34d, and elastically deforms itself, and the side wall of the fitting hole 34d also acts to deform the hole in a direction of expanding the hole.

Thereafter, when the upper absorbent pad 2 is further displaced, the second projection 24b abuts on the side wall of the second fitting hole 34b with the displacement, and then the first projection 24a is moved to the first fitting hole. The same operation is performed by contacting the side wall of 34a. Here, the case where a load is applied to the upper absorbent pad 2 has been described. However, when the load is applied to the lower absorbent pad 3 or both the pads 2 and 3, the operation is exactly the same.

That is, when a lateral load is applied to the vibration-proof / shock-absorbing pad 1, both the absorbing pads 2 and 3
The protrusions 24 are relatively displaced along the lines 2 and 32, and as the amount of displacement increases, the number of the protrusions 24 elastically deformed so as to be bent by contacting the side wall of the fitting hole 34 increases stepwise.
As a result, in the projection 24 and the contact portion of the projection 24, the restoring force (repulsion force for preventing displacement) for returning to the original state increases, and the applied load is rapidly attenuated.

Next, FIG. 6A shows a state before a vertical load is applied to the vibration-proof / shock-absorbing pad 1. Then, when a vertical load is applied to the vibration-proof / shock-absorbing pad 1 and the upper absorbing pad 2 is displaced in a direction (vertical direction) pressed against the lower absorbing pad 3, as shown in FIG. The fourth protrusion 24d in contact with the bottom of the fourth fitting hole 34d is elastically deformed so as to expand in the lateral direction. At this time, the other first to third loose fitting pairs also
The protrusion moves in the fitting hole, and among these, the third protrusion 24
c first contacts the bottom of the third fitting hole 34c.

When the upper absorbent pad 2 is further displaced from this state, as shown in FIG. 6C, the third protrusion 24c abutting on the side wall of the fitting hole 34c is also similar to the fourth protrusion 24d. Elastically deform so as to expand in the lateral direction.
Thereafter, when the upper absorbent pad 2 is further displaced, the second projection 24b abuts on the bottom of the second fitting hole 34b with the displacement, and the first projection 24a is subsequently moved to the first fitting hole 34a.
Abuts on the bottom and operates similarly.

That is, when a vertical load is applied to the vibration-proof / shock absorbing pad 1, the two absorbing pads 2 and 3 are relatively displaced in a direction closer to each other. The number of the projections 24 that are elastically deformed so as to be pressed against the bottom of the hole 34 increases stepwise.
As a result, in the projection 24 and the contact portion of the projection 24, the restoring force (repulsion force for preventing deformation) for returning to the original shape increases, and the applied load is rapidly attenuated.

At this time, the elastically deformed projection 24 pressed against the bottom of the fitting hole 34 also comes into contact with the inclined side wall of the fitting hole 34. The contact surface is inclined with respect to the direction (longitudinal direction) to which the load is applied, and the material (hardness) of the two absorbing pads 2 and 3 that are in contact with each other.
Are different from each other, the transmission direction of the applied load is dispersed at the contact portion between the two, and the load reaching the external contact surface of the mating side with respect to the load application side is further attenuated.

As described above, the anti-vibration of the present embodiment
In the shock absorbing pad 1, a load is applied to the upper absorbing pad 2 and the lower absorbing pad 3 via the external contact surface in either a horizontal direction along the external contact surface or a vertical direction intersecting the external contact surface. However, the number of the projections 24 that abut against the wall or bottom of the fitting hole 34 and are elastically deformed by the relative displacement of the two absorbing pads 2 and 3 based on the applied load (therefore, the distance between the two). (Contact area) is increased stepwise.

Therefore, according to the vibration-proof / shock-absorbing pad of this embodiment, the relative displacement between the two pads 2 and 3
In other words, the greater the load, the greater the restoring force (repulsive force) generated according to the magnitude of the applied load. Therefore, no matter what load is applied, the vibration or impact that caused the load is rapidly reduced. And this can be effectively absorbed.

Further, in the vibration-proof / shock-absorbing pad 1 of the present embodiment, the projection 24 and the fitting hole 34 are both formed in a circular cross section, so that they can be subjected to vibration in any direction along the external contact surface. Also, uniform vibration absorption characteristics can be obtained. Further, in the vibration damping / shock absorbing pad 1 of the present embodiment, four types of protrusions 24a to 24d having different diameters and heights are used, and each of the protrusions 24a to 24d has a different natural frequency. Therefore, even if one of the protrusions 24 resonates, the vibration can be reliably absorbed by the action of the other protrusions 24 without being affected by the resonance, and the vibration in a wide frequency range can be absorbed.

As described above, the vibration-proof / shock-absorbing pad 1 of this embodiment is not limited to the case where the electronic balance D which needs to block the vibration transmitted from the surroundings is installed. When a device that generates vibration such as a molding machine is installed, a vibration-proof / shock-absorbing pad 1 is sandwiched between the device and the floor on which the device is mounted, and the vibration generated by the device is placed around the device. It may be used to prevent transmission. In other words, it may be used in any place where it is necessary to prevent transmission of vibration.

In this embodiment, the upper absorbent pad 2
Is provided with only the projection 24, and the lower absorbent pad 3 is provided with a fitting hole 34.
Although only the projection 24 and the fitting hole 34 are provided, the projection 24 and the fitting hole 34 may be provided on either side, and the projection 24 and the fitting hole 34 may be mixed on the same pad.

Further, the shape of the projection 24 is not limited to a columnar shape, and may be a polygonal column, a hemisphere, a pyramid, a cone, an ellipsoidal cone, a triangular pyramid, or the like that can make point contact or line contact with another object. Any shape may be used as long as it has a portion. When manufacturing the upper absorbent pad 2 and the lower absorbent pad 3,
By appropriately kneading the desired filler with the material,
For example, properties such as heat conductivity, conductivity, electromagnetic wave absorption, electromagnetic wave shielding, vibration damping, sound absorption, sound insulation, heat insulation, and magnetic force may be imparted.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating a state in which a vibration-proof / shock-absorbing pad according to an embodiment is sandwiched between an electronic balance and a mounting table.

FIG. 2 is a plan view and a cross-sectional view of an upper absorbent pad of the present embodiment.

FIG. 3 is a plan view and a cross-sectional view of a lower absorbent pad of the present embodiment.

FIG. 4 is a cross-sectional view of the vibration-proof / shock-absorbing pad of the embodiment.

FIG. 5 is a schematic diagram for explaining how the protrusion operates when a roll acts on the vibration-proof / shock-absorbing pad of the embodiment.

FIG. 6 is a schematic diagram for explaining how the projection operates when a vertical swing acts on the vibration-proof / shock-absorbing pad of the embodiment.

FIG. 7 is a side view and a schematic view of a conventional anti-vibration pad.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Vibration-proof / shock absorption pad 2 ... Upper absorption pad 3 ... Lower absorption pad 22 ... Lamination surface 26 ... Weir part 24 (24a-24d) ... Projection 34 (34a-34)
d) ... mating hole

Claims (4)

[Claims] 1. A vibration-damping / shock-absorbing pad formed by laminating a plurality of plate-like elastic members, wherein a contact surface of the elastic member with another layer is formed by a protrusion and a fitting hole which are loosely fitted to each other during lamination. A plurality of loose fitting pairs are formed, and the loose fitting pair is configured such that the larger the relative displacement between the elastic members that occurs when an external load is applied, the more the contact between the wall surface of the fitting hole and the protrusion. A vibration-proof and shock-absorbing pad characterized by being formed in a shape having an increased area. 2. The vibration-absorbing / shock-absorbing pad according to claim 1, wherein the loose-fit pair is a direction in which the load is applied in a gap formed between a wall surface in the fitting hole and the projection. Wherein the interval between the portions facing each other is formed so as to have a different size for each of the loose fitting pairs.
Shock absorbing pad. 3. The vibration-absorbing / shock-absorbing pad according to claim 1, wherein the loosely-fitted pair is formed of a gap formed between a wall surface in the fitting hole and the projection. A vibration-isolating / shock-absorbing pad, characterized in that the distance between the portions facing each other in the direction of application of the load gradually widens from the root to the tip of the projection. 4. The vibration-damping / shock-absorbing pad according to claim 1, wherein the elastic member has an elastic force different from that of another adjacent layer. Shock absorbing pad.