JPH05256336A - Vibration control device - Google Patents

Abstract

PURPOSE:To improve vibration control effect and reduce noises by providing an upper frame on a lower frame through an elastic member, and arranging the elastic member immediately beflow an installation position of a vibration control object to the upper frame by means of a fastening means. CONSTITUTION:A vibrationproof device 1, supporting a vibrationproof object 10, has a lower frame and an upper frame 6 which is supported thereby through an elastic member on a position 4. The elastic member has upper and lower rubber plates 3a, 3b, a compression coil spring 4, and a rubber plate 5. The plate 5 is abutted against a U-shaped steel 7 welded onto a lower surface of the upper frame 6. A bolt 9 aligned to an axis of a spring 4 is inserted through an opening 11a of a support leg 11 of the vibrationproof 10, an opening 6a of the upper frame 6, and a through-hole 7b of the U-shaped steel 7. A nut 12 is screwed with an insertion end, and fitted to a center port 5a of the plate 5 so as not to relatively rotated. Oscillation speed of the upper frame 6 shows a minimum value at the installation position by means of the bolt 9 and the nut 12. Since the elastic member is arranged just thereunder, the oscillation transmitted thereto is reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration control device for supporting a vibration control target such as an air conditioner installed in a building.

[0002]

2. Description of the Related Art For example, when installing an air conditioner in a building,
The air conditioner is supported via a vibration isolator so that the vibration of the air conditioner is not transmitted to the building. As such an anti-vibration device, a lower mount and an upper mount supported on the lower mount via an elastic member are provided, and a vibration isolation target such as an air conditioner is attached to the upper mount by bolts and nuts. It is used.

In order to prevent the noise generated by the vibration-proof object from leaking between the upper mount and the lower mount to the outside, and to prevent the elastic member from being corroded by the rain wind entering from the side between the upper mount and the lower mount. In addition, the vibration-proof member is covered with a container-shaped cover, and the outer peripheries of the upper pedestal and the lower pedestal are covered with sheets. Further, a stopper is provided to prevent the displacement of the upper mount relative to the lower mount in the event of an earthquake or the like.

[0004]

In the structure of the conventional antivibration device, noise is a problem because the vibration of the antivibration object cannot be sufficiently absorbed.

Further, since a cover for covering the vibration isolating member or a sheet for covering the outer peripheries of the upper mount and the lower mount and a stopper for an earthquake or the like are provided, the number of parts is increased.

Further, when the vibration-proof object is attached to the upper frame with bolts and nuts and the width and the length of the vibration-proof object are different, the positions of the bolt insertion openings on the side of the vibration-proof object and on the upper frame side. Therefore, a different anti-vibration device or mounting jig was required for each different anti-vibration object.

It is an object of the present invention to provide a vibration isolation device which can solve the above-mentioned problems of the prior art.

[0008]

A feature of the present invention is that a lower mount and an upper mount supported on the lower mount via an elastic member are provided, and a vibration-proof object is fastened to the upper mount. In the vibration isolation device attached by means, the elastic member is arranged immediately below the attachment position of the vibration isolation target to the upper frame by the fastening means.

There is provided a first shield part provided on the upper mount so as to surround the elastic member between the upper mount and the lower mount, and a second shield part provided on the lower mount so as to surround the elastic member. It is preferable that the first shield part is located outside the second shield part with a space therebetween, and the lower end of the first shield part is located below the upper end of the second shield part.

Bolts and nuts are used as fastening means for attaching the vibration-proof object to the upper pedestal, and bolt insertion openings for inserting the bolts are formed in the vibration-proof object and the upper cradle. Each bolt insertion opening is formed. Has a shape elongated in one direction in plan view so that the bolt can move in one direction inside.
It is preferable that the longitudinal direction of the bolt insertion opening on the vibration isolation target side and the longitudinal direction of the bolt insertion opening on the upper cradle side are formed so as to be orthogonal to each other.

[0011]

FIG. 7 shows the relationship between the distribution of the vibration acceleration of the upper mount 101 due to the vibration of the vibration isolation target 100 and the position of the upper mount 101. As a result, the magnitude of the vibration acceleration of the upper pedestal 101 is the same as that of the upper pedestal 10 of the vibration isolation target 100.
It was found that the positions were the smallest at the mounting positions 102 and 103, and that the positions became larger as the positions were farther away. Conventionally, the elastic member 104 that supports the upper pedestal 101 is attached to the upper pedestal 101 at the mounting position 10 of the vibration isolation target 100.
It was arranged at a position displaced in the lateral direction from Nos. 2 and 103. On the other hand, according to the present invention, since the elastic member is arranged immediately below the attachment position of the vibration isolation target to the upper mount, the vibration transmitted from the upper mount to the elastic member is reduced, and the vibration isolation performance is improved. To do.

The first shielding portion provided on the upper pedestal and the second shielding portion provided on the lower pedestal prevent the invasion of rain and wind from the side between the upper pedestal and the lower pedestal. Corrosion can be prevented and lateral displacement of the upper mount relative to the lower mount can be prevented by the contact between the first shield and the second shield.

Further, each of the bolt insertion openings of the vibration isolation target and the upper mount is elongated in one direction in plan view so that the bolt can move in one direction inside the bolt insertion opening on the vibration isolation target side. The longitudinal direction of the passage opening and the longitudinal direction of the bolt insertion opening on the upper cradle side are formed so as to be orthogonal to each other.
Therefore, the bolts can be inserted into the vibration isolation target and the upper pedestal to attach the vibration isolation target to the upper pedestal as long as the bolt insertion openings are vertically overlapped. That is, it becomes possible to attach vibration-proof objects having different widths and lengths to the same upper frame.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

The vibration isolator 1 shown in FIGS. 1 to 3 supports a building air conditioner (anti-vibration object) 10, and includes a lower base 2 and an elastic member 4 interposed between the lower base 2 and the lower base 2. And an upper pedestal 6 supported at a position.

The elastic member is composed of two upper and lower rubber plates 3, a compression coil spring 4 fitted to the upper rubber plate 3a and supported by the lower rubber plate 3b, and the compression coil spring 4. And a rubber plate 5 supported by.

A U-shaped steel 7 is welded to the lower surface of the upper pedestal 6, and the rubber plate 5 is brought into contact with the U-shaped steel 7. The U-shaped steel 7 forms a groove of a downward opening along the outer periphery of the upper pedestal 6, and the outer wall of this groove constitutes a first shielding portion 7a surrounding the elastic member.

An L-shaped steel 8 is welded to the outer peripheral end surface of the lower pedestal 2, and one side wall of the L-shaped steel 8 constitutes a second shielding portion 8a surrounding the elastic member.

The first shield portion 7a is located outside the second shield portion 8a with a space therebetween, and the lower end of the first shield portion 7a is located below the upper end of the second shield portion 8a.

The bolts 9 located on the central axis of the compression coil spring 4 are the bolt insertion opening 11a of the support leg 11 of the air conditioner 10, the bolt insertion opening 6a of the upper frame 6, and the through hole 7b of the U-shaped steel 7. The nut 12 is inserted in order from above, and the nut 12 is screwed to the insertion end. The nut 12
Are fitted in a central hole 5a formed in the rubber plate 5 so as not to rotate relative to each other. As a result, the elastic member is arranged immediately below the attachment position of the air conditioner 10 to the upper frame 6. The one end surface 5b of the rubber plate 5 is in contact with the inner surface of the U-shaped steel 7 to prevent the rubber plate 5 from rotating when the bolt 9 is screwed into the nut 12.

Further, a nut 14 is attached to the L-shaped steel 8 via a support base 13, and the upper mount 6 is attached to the nut 14.
The bolt 15 inserted in the is fastened. Further, a contacted plate 16 is attached to the upper surface of the upper pedestal 6 so as to surround the shaft portion 15a of the bolt 15. This allows
If the upper pedestal 6 is largely displaced vertically due to an earthquake,
The contacted plate 16 contacts the head portion 15b of the bolt 15 to prevent the upper pedestal 6 from being excessively displaced in the vertical direction.

As shown in FIG. 4, the bolt insertion opening 6a of the upper pedestal 6 has a shape elongated in one direction (vertical direction in the drawing) in plan view so that the bolt 9 can move in one direction. ing. Further, the bolt insertion opening 11a of the support leg 11 of the air conditioner 10 has a shape elongated in one direction (left and right in the drawing) in plan view so that the bolt 9 can move in one direction inside. The longitudinal direction of the bolt insertion opening 6a of the upper pedestal 6 and the longitudinal direction of the bolt insertion opening 11a of the air conditioner 10 are orthogonal to each other, and the bolt insertion hole 30 is formed in the overlapping portion of both the bolt insertion openings 6a and 11a. Is forming.

As shown in FIG. 5, the guide shaft 51 and the weight adjusting screw shaft 52 are supported by the U-shaped steel 7 in parallel with each other along the longitudinal direction of the upper frame 6. A weight 53 is screwed onto the weight adjusting screw shaft 52, and the guide shaft 51 is inserted into the weight 53. As a result, when the weight adjusting screw shaft 52 is rotated, the weight 53 reciprocates along the longitudinal direction of the upper frame 6. By moving the weight 53, the position of the center of gravity of the load of the air conditioner 10 acting on the elastic member can be adjusted.

According to the above structure, the vibration acceleration of the upper pedestal 6 due to the vibration of the air conditioner 10 becomes the smallest at the position where the bolt 9 and the nut 12 are attached to the upper pedestal 6 of the air conditioner 10. Since the elastic member that supports the upper pedestal 6 is arranged immediately below the nut 12, the vibration transmitted to the elastic member is reduced, and the vibration isolation performance is improved.

FIG. 6 shows the relationship between the transmission ratio of vibrations transmitted from the air conditioner 10 through the vibration isolator and the frequency. The solid line in the figure represents the measurement result of the vibration isolator 1 of the above embodiment, The broken line in the figure represents the measurement result of the conventional vibration damping device. As a result, according to the vibration isolator of the above-described embodiment, the noise transmitted by the vibration of the anti-vibration object has a great influence.
It can be confirmed that the vibration isolation performance is improved at frequencies of 00 Hz to 400 Hz.

Further, since the first shield portion 7a and the second shield portion 8a prevent rain and wind from entering the upper pedestal 6 and the lower pedestal 2 from the outside, corrosion of the vibration isolating member can be prevented. Moreover, when the upper pedestal 6 is excessively displaced laterally in the event of an earthquake,
This can be prevented by the contact between the first shield portion 7a and the second shield portion 8a, and the number of parts can be reduced without the need to separately provide a stopper.

Furthermore, since the longitudinal direction of the bolt insertion opening 11a on the side of the air conditioner 10 and the longitudinal direction of the bolt insertion opening 6a on the side of the upper pedestal 6 are orthogonal to each other, air conditioners 10 of different sizes can be mounted on the same upper pedestal. 6 can be attached. Therefore, the mountable range of the air conditioner 10 to the upper pedestal 6 is widened, and the air conditioner 10 having different widths and lengths in which the bolt insertion openings 11a are formed at different positions can be attached to the same upper pedestal 6. Becomes

The present invention is not limited to the above embodiment. For example, although the present invention is applied to the vibration isolator of the air conditioner in the above embodiment, the vibration isolator is not particularly limited. The U-shaped steel 7 and the L-shaped steel 8 are used to form the shielding portions 7a and 8a, but the constituent portions of the shielding portions are not particularly limited.

[0029]

According to the anti-vibration device of the present invention, since the elastic member is arranged immediately below the position where the anti-vibration object is attached to the upper frame, the anti-vibration effect is improved and noise can be reduced.

Further, the first shield part and the second shield part prevent wind and rain from penetrating between the upper mount and the lower mount and noise leaking from the object to be isolated from vibration between the upper mount and the lower mount. In addition, since the first shield member and the second shield member are in contact with each other, excessive lateral displacement of the upper mount can be prevented without providing a separate stopper, so that the number of parts can be reduced.

Further, the bolt insertion openings formed in the vibration-proof object and the upper frame are elongated in one direction in plan view so that the bolts can move in one direction inside thereof, and the bolt insertion openings of each other. Since the longitudinal directions of are orthogonal to each other, it is possible to attach vibration-proof objects of different sizes to the same upper frame.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a main part of a vibration isolation device according to an embodiment of the present invention.

FIG. 2 is a side view of a vibration isolation device showing an embodiment of the present invention.

FIG. 3 is a front view of a vibration control device showing an embodiment of the present invention.

FIG. 4 is a plan view showing an upper frame of the vibration control device according to the embodiment of the present invention.

FIG. 5 is a bottom view showing the upper mount of the vibration isolator according to the embodiment of the present invention.

FIG. 6 is a diagram showing a relationship between a vibration transmission ratio and a frequency of a vibration isolation device according to the present invention.

FIG. 7 is an operation explanatory view of a conventional vibration isolation device

[Explanation of symbols]

 1 Vibration Isolator 2 Lower Frame 3a, 3b, 4, 5 Elastic Member 6 Upper Frame 6a Bolt Insertion Opening 7a First Shield 8a Second Shielding 9 Bolt 10 Air Conditioner (Vibration Isolation Target) 11a Bolt Inserting Opening

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Minoru Okubo 1-32, Chaya-cho, Kita-ku, Osaka City, Osaka Prefecture Yanmar Diesel Co., Ltd. No. 32 Yanmar Diesel Co., Ltd. (72) Inventor Toshiyuki Uyama 1-32 Yanmar Diesel Co., Ltd.

Claims (3)

[Claims] 1. A vibration isolator comprising a lower mount and an upper mount supported by the lower mount via an elastic member, wherein a vibration isolation target is attached to the upper mount by fastening means. An anti-vibration device, wherein the elastic member is disposed immediately below a position where the elastic member is attached to the upper mount of the article. 2. A first shield part provided on the upper mount so as to surround an elastic member between the upper mount and the lower mount, and a second shield part provided on the lower mount so as to surround the elastic member, The first shield part is located outside the second shield part with a space, and the lower end of the first shield part is located below the upper end of the second shield part. 1
The anti-vibration device described in. 3. A bolt and a nut are used as fastening means for attaching the vibration-proof object to the upper mount, and a bolt insertion opening for inserting the bolt is formed in the vibration-proof object and the upper mount. The opening is long in one direction in plan view so that the bolt can move in one direction inside, and the longitudinal direction of the bolt insertion opening on the side of the vibration isolation target and the longitudinal direction of the bolt insertion opening on the upper mount side. The anti-vibration device according to claim 1 or 2, wherein the anti-vibration device is formed so as to be orthogonal to.