JPH07217702A - Vibration control pedestal - Google Patents

Abstract

PURPOSE:To provide a vibration control pedestal excellent in vibration absorbability and having small amplitude. CONSTITUTION:A seat plate 3 is installed on the bottom 2A of a rubber made vibration absorbent member 2, a supporting member 4 inserted in the inside of a wall 2B and a housing is externally fitted to it from the above. The vibration absorbent member 2 is made of a round shape bottom 2A and the wall 2B formed on the periphery of the bottom 2A. A screw member 6 is screwed into the screw hole 5a of the housing 5. The leg 8 of a machine is connected to the screw member 6. The vibration absorbent member 2, specially, is better to have it made of an urethane rubber. Thus amplitude of the vibration absorbent member 2 can be made small and machine is not easily broken down due to vibration.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration prevention foot stand connected to the legs of various machines such as machine tools and food manufacturing machines.

[0002]

2. Description of the Related Art Various machines such as machine tools and food manufacturing machines generate vibrations due to their operation. This vibration causes noise and causes failure and shortens the life of parts. For this reason, a foot stand for vibration prevention is connected to the leg part of the machine. An example of such a conventional vibration prevention footrest is a bottom portion 11A as shown in FIGS. 14 and 15.
And a vibration absorbing member 11 made of rubber consisting of a wall 11B formed on the outer edge of the bottom 11A, and a center fitted outside the wall 11B so as to cover the vibration absorbing member 11 from above. A housing 12 having a screw hole 12A in the front, a screw member 13 made of steel screwed into the screw hole 12A of the housing 12, and a steel seat plate installed on the bottom 11A of the vibration absorbing member 11.
It is common to have 14 and. In addition, 17 is a washer. The vibration prevention leg stand 10 is a wall portion of the vibration absorbing member 11.
By adhering the abutting portion of the upper end portion of 11B and the housing 12 or adjusting the screwing portion of the screw member 13 and the screw hole 12A, the seat plate is provided at the tip portion of the screw member 13.
The height of the leg portion 16 can be adjusted by pressing 14 to change the length of the housing 12 fitted on the wall portion 11B of the vibration absorbing member 11. In this vibration prevention leg stand 10, as the vibration absorbing member 11, a member made of chloroprene rubber having good weather resistance and heat resistance is usually used. Also, the effect is that the leg 16A of the machine has a bifurcated tip 16A.
16 is sandwiched between the screw members 13, fixed by a nut 15, and vibrations caused by machine operation are absorbed by the vibration absorbing member 11.

[0003]

In the conventional vibration-proof footrest 10, the noise reduction effect of the machine can be obtained to some extent, but the outside of the wall portion 11B of the vibration-absorbing member 11 is the housing.
Although it is supported by 12, the inside of it is not supported at all, so the amplitude of the vibration absorbing member 11 due to the vibration of the machine is large, and the housing 12 also vibrates accordingly, so the effect of damping the amplitude of the machine is not sufficient. However, there is a problem that the machine is easily broken and the life of parts is shortened. In particular, the vibration absorbing member 11 is usually made of chloroprene rubber, but although this chloroprene rubber has excellent weather resistance and heat resistance, it does not have sufficient mechanical strength and hardness, so it has sufficient strength as a foot of a machine. In order to have it, it must be thick to some extent, which also contributes to the large amplitude.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems and to provide a vibration-preventing footrest which is excellent in vibration absorption and has a small amplitude. It is another object of the present invention to provide a vibration-preventing footrest that can reduce the thickness of the vibration-absorbing member and has a smaller amplitude.

[0005]

According to a first aspect of the present invention, a rubber vibration absorbing member having a bottom portion and a wall portion formed on an outer edge portion of the bottom portion, and the vibration absorbing member is fitted from above. In a vibration-preventing foot stand, which comprises a housing having a screw hole in the center thereof and a steel screw member connected to the screw hole of the housing, and a leg portion of a machine is connected to the steel screw member, It is a vibration-prevention foot stand in which a support member is inserted inside the wall of the member.

According to a second aspect of the present invention, there is provided the vibration preventing leg base according to the first aspect, wherein the vibration absorbing member is made of urethane rubber.

[0007]

With the above structure, since the outer wall surface side of the vibration absorbing member is supported by the housing and the inner wall surface side is supported by the supporting member, the vibration of the vibration absorbing member is limited,
The amplitude of the anti-vibration base is reduced.

In particular, when the vibration absorbing member is made of urethane rubber which is harder than the conventional chloroprene rubber, the thickness of the vibration absorbing member can be reduced, and the amplitude can be increased while maintaining the vibration absorbing property at a good level. It can be made smaller.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. The vibration prevention foot stand 1 of the present invention comprises a rubber vibration absorbing member 2 including a circular bottom portion 2A and a wall portion 2B formed on an outer edge portion of the bottom portion 2A, and a bottom portion 2A of the vibration absorbing member 2. A disk-shaped seat plate 3 that is placed, a substantially donut-shaped support member 4 that is inserted inside the wall portion 2B on the seat plate 3, and a center where the vibration absorbing member 2 is externally fitted from above. The housing 5 is provided with a screw hole 5A, and a screw member 6 made of steel which is connected to the screw hole 5A of the housing 5 by screwing. In addition, 7 is a nut, 8 is a leg part of a machine, and 9 is a washer.

In this embodiment, the vibration absorbing member 2 has panel-shaped recesses 21 radially formed on its bottom surface as shown in FIG. By forming the bottom surface into such a shape, it is possible to make the bottom surface of the vibration absorbing member 2 serving as the grounding surface of the footrest 1 less slippery and to improve the vertical vibration absorption. The rubber material forming the vibration absorbing member 2 is not particularly limited, and synthetic rubber such as urethane rubber or chloroprene rubber can be used, but urethane rubber is particularly preferable. Since urethane rubber has excellent weather resistance, oil resistance, mechanical strength, and high hardness, the wall thickness of the wall portion 2A of the vibration absorbing member 2 can be made smaller than that of chloroprene rubber, and the effect of further reducing the amplitude can be obtained. Have. Moreover, the wall thickness of the wall portion 2A of the vibration absorbing member 2 can be made smaller than that of the chloroprene rubber, so that the raw materials used can be reduced. In particular, a thermoplastic urethane rubber having a good injection moldability is preferable in order to match the size with the outer diameter of the support member 4 described later. Typical examples of the thermoplastic urethane rubber include those obtained by binding a butanediol-adipic acid polyester with diphenylmethane-4,4'-diisocyanate. Grades can be used. As the rubber material, preferably urethane rubber, a low foaming type may be used. The low foam type rubber material can be obtained by finely dispersing a foaming agent and a small amount of gas. Vibration absorption characteristics are further improved by using a low foam type urethane rubber.

Further, the supporting member 4 is not particularly limited as long as it has an outer peripheral portion having the same shape as the inner peripheral surface of the wall portion 2B of the vibration absorbing member 2, but in the present embodiment, it is shown in FIGS. As shown in FIG. 6, the wall portion 2B of the vibration absorbing member 2
An outer peripheral portion 41, a central opening 42, and a bottom portion 43 having the same shape as the inner peripheral surface of
And a rib 43A is formed on the bottom portion 43 by connecting the outer peripheral portion 41 and the central opening portion 42 to each other. With such a configuration, the weight of the support member 4 can be reduced. Support member 4 as described above
As the material, various materials such as steel, wood, and hard plastic can be used, but it is particularly preferable to use hard plastic that is excellent in moldability and can be reduced in weight. The hard plastic is preferably an acrylonitrile-butadiene-styrene resin (ABS resin) which is excellent in injection moldability and mechanical strength, and a low foaming type is particularly preferable. The low foaming type acrylonitrile-butadiene-styrene resin can be obtained by finely dispersing a foaming agent and a small amount of gas. By using the low foaming type acrylonitrile-butadiene-styrene resin, the weight of the supporting member 4 can be further reduced.

The housing 5 is a cover as shown in FIG.
51 and a connecting member 52, the cover 51 includes a wall portion 51A and a disk-shaped top surface portion 51B having an opening in the center, and the wall portion 51A is an outer peripheral surface of the wall portion 2B of the vibration absorbing member 2. It has an inner peripheral surface of the same shape and can be externally fitted from above the vibration absorbing member 2. The connecting member 52 is a tubular member having one end reduced in diameter, and a thread groove is formed in the tube to form a screw hole 5A. The housing 5 has the cover 51.
The reduced diameter portion of the connecting member 52 is inserted into the opening of the top surface portion 51B and the both are joined. It is preferable that the tip T of the connecting member 52 is slightly protruded from the top surface portion 51B of the cover 51, preferably about 0.2 mm, at the reduced diameter portion. By preventing the tip T of the reduced diameter portion of the connecting member 52 from slightly protruding from the top surface portion 51B, the load of the machine is applied from the leg portion 8 to the connecting member 52, and a large load is prevented from being applied to the cover 51 having poor strength. can do. It also has the effect of reducing the amplitude of the vibration absorbing member 2. In such a housing 5, the cover 51 is generally made of steel, but not limited to steel, various hard materials can be used. As the hard material other than steel, hard plastic is preferable, and polyamide resin is particularly preferable. As the polyamide resin, a fiber-reinforced polyamide resin obtained by mixing glass fiber, carbon fiber, or the like into polyamide resin and reinforcing the same can also be used. By using the cover made of polyamide resin, most of the exposed part is made of non-metallic material such as plastic and rubber, so that rust etc. hardly occur and the working environment can be kept hygienic, especially for food machinery. Suitable for Further, the connecting member 52 is made of steel because a large load is applied to the machine as described later. Therefore, the cover 51
When the cover 51 is made of steel, the two may be joined by welding, and when the cover 51 is made of hard plastic, the two may be joined by an adhesive or the like. It should be noted that the housing 5 as described above does not have to be composed of the two members of the cover 51 and the connecting member 52 as in the present embodiment, and may be integrally formed. Further, as the seat plate 3 and the screw member 6, those made of steel can be used.

In the vibration preventing leg stand 1 of the present invention comprising the above-mentioned respective components, the seat plate 3 is installed on the bottom portion 2A of the vibration absorbing member 2, and the supporting member 4 is inserted inside the wall portion 2B. ,
It can be obtained by fitting the housing 5 from the upper part and screwing the screw member 6 to a desired position in the central screw hole 5A.

Next, the operation of the above structure will be described. The leg portion 8 of the machine can be fixed by sandwiching the tip portion 8A of the leg portion 8 of the machine having a two-pronged end portion in the screw member 6 and fixing it with the nut 7 from above. Then, when the vibration due to the operation of the machine is propagated from the leg portion 8 to the vibration prevention leg base 1, the vibration absorbing member 2 vibrates. The outer side of the vibration absorbing member 2 is supported by the housing 5,
Since the inside is supported by the support member 4, its amplitude is suppressed and is extremely small. Therefore, problems such as machine failure and shortened parts life are resolved. In particular, when the vibration absorbing member 2 is made of urethane rubber, the amplitude can be further reduced while maintaining a sufficient vibration absorbing property. Further, since the central opening 42 is formed in the support member 4, the screw member 6 is adjusted by adjusting the depth at which the screw member 6 is screwed into the screw hole 5A of the connection member 52.
It is possible to change the length of the housing 5 fitted onto the vibration absorbing member 2 by pressing the seat plate 3 at the tip of the leg portion, whereby the height of the leg portion 8 can be adjusted. Although the diameter of the central opening 42 of the support member 4 and the diameter of the connecting member 52 of the housing 5 are substantially the same in this embodiment,
As shown in FIG. 8, the diameter of the central opening 42 can be made larger than the diameter of the connecting member 52. The central opening 42
By making the diameter of the connecting member 52 larger than the diameter of the connecting member 52, the amplitude amount in the horizontal direction can be controlled according to the gap (D) due to the difference in the diameter.

Next, a second embodiment of the present invention will be described with reference to FIGS. 9 and 10. Anti-vibration base 1 of the second embodiment
Is the same as the first embodiment except the support member 4 and the housing 5. As shown in FIG. 9, the support member 4 has an outer peripheral portion 41 having the same shape as the inner peripheral surface of the wall portion 2B of the vibration absorbing member 2, a central opening portion 42, and a bottom portion 43. It is a quadrangle (width A, length B). Housing 5
10 is composed of a cover 51 and a connecting member 52 as shown in FIG. 10, the cover 51 is composed of a wall portion 51A and a disk-shaped top surface portion 51B having a central opening, and the wall portion 51A is the vibration absorbing member. It has an inner peripheral surface having the same shape as the outer peripheral surface of the second wall portion 2B, and can be externally fitted from above the vibration absorbing member 2. The connecting member 52 is a tubular member having a regular square pole shape (one side length a) with one end having a reduced diameter, and a thread groove is formed in this tube to form a screw hole 5A. The housing 5 is formed by inserting the reduced diameter portion of the connecting member 52 into the opening of the top surface portion 51B of the cover 51 and joining the both.

The operation of the above configuration will be described. The width (A) of the central opening 42 of the supporting member 4 is made substantially the same as the width (a) of the connecting member 52, and the length (B) of the central opening 42 of the supporting member 4 is set to the length (a) of the connecting member 52. ), The central opening 42 fitted on the connecting member 52 can move only in the longitudinal direction. For this reason, the direction of the amplitude of the vibration prevention leg 1 can be substantially limited to the length direction. Also, the amplitude amount can be controlled according to the difference in the length. The shapes of the central opening 42 and the connecting member 52 of the support member 4 are not limited to the circle and the quadrangle, but may be various shapes such as a hexagonal shape, an octagonal shape, or the like, or a shape in which the corners are rounded. be able to.

Although the present invention has been described above with reference to the accompanying drawings, the present invention is not limited to the above embodiments, but can be appropriately modified within the scope of the gist of the present invention. For example, the vibration absorbing member 2 is not limited to the circular shape as in this embodiment, but may be a rectangular shape as shown in FIG. In this case, the seat plate 3, the support member 4, and the housing 5 may each be rectangular. Further, it can be applied to various shapes such as a polygonal shape such as a hexagon and an octagon or a shape in which the corners are rounded. Further, the wall surface 2B of the vibration absorbing member 2 does not have to be perpendicular to the bottom surface 2A, and may be gradually expanded in diameter as shown in FIG. 12, and the shape of the bottom surface of the vibration absorbing member 2 is shown in FIG. It may have a concentric groove 22 as shown in (1), or may be simply a flat surface.

[0018]

According to the first aspect of the present invention, a rubber vibration absorbing member having a bottom portion and a wall portion formed at an outer edge portion of the bottom portion, and a screw at the center where the vibration absorbing member is fitted from above. A vibration-preventing pedestal comprising a housing having a hole and a steel screw member connected to a screw hole of the housing, wherein a leg portion of a machine is connected to the steel screw member, and a wall portion of the vibration absorbing member is provided. Since the support member is inserted inside, it is a vibration-preventing pedestal with a small amplitude.

In particular, since the vibration absorbing member is made of urethane rubber, the thickness of the vibration absorbing member can be reduced, and the amplitude can be further reduced while maintaining good vibration absorbing property.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a first embodiment of the present invention.

FIG. 2 is a perspective view showing a first embodiment of the present invention.

FIG. 3 is an exploded perspective view showing the first embodiment of the present invention.

FIG. 4 is a plan view showing a bottom surface of the vibration absorbing member of the first embodiment.

FIG. 5 is a plan view showing a support member of the first embodiment.

FIG. 6 is an A-O-B sectional view showing the support member of the first embodiment.

FIG. 7 is a vertical cross-sectional view showing a housing, in which (a) shows a cover and (b) shows a connecting member.

FIG. 8 is a cross-sectional view showing a modified example of the vibration prevention leg stand of the first embodiment.

FIG. 9 is a plan view showing a support member according to a second embodiment of the present invention.

FIG. 10 shows a housing according to the second embodiment,
(a) is a vertical sectional view, and (b) is a bottom view.

FIG. 11 is a plan view showing a bottom surface of a vibration absorbing member according to a third embodiment of the present invention.

FIG. 12 is a perspective view showing a vibration absorbing member according to a fourth embodiment of the present invention.

FIG. 13 is a plan view showing a bottom surface of a vibration absorbing member according to a fifth embodiment of the present invention.

FIG. 14 is a vertical cross-sectional view showing a conventional vibration prevention leg stand.

FIG. 15 is a perspective view showing a conventional anti-vibration pedestal.

[Explanation of symbols]

 1 Vibration Prevention Foot 2 Vibration Absorbing Member 2A Bottom 2B Wall 4 Supporting Member 5 Housing 5A Screw Hole 6 Screw Member

Claims (2)

[Claims] 1. A vibration absorbing member made of rubber, which comprises a bottom portion and a wall portion formed on an outer edge portion of the bottom portion, a housing having a screw hole at a center thereof, the vibration absorbing member being fitted from above, and the housing. And a steel screw member connected to the screw hole of, and a support member is inserted inside the wall portion of the vibration absorbing member in a vibration prevention foot stand that connects the leg portion of the machine to the steel screw member. Anti-vibration foot stand. 2. The vibration preventing leg stand according to claim 1, wherein the vibration absorbing member is made of urethane rubber.