JPH07208542A - Vibration control board equipped with aseismic stopper - Google Patents

Abstract

PURPOSE:To provide a vibration control boar which is equipped with an aseismic stopper and prevents the deterioration of the vibrationproof effect of a vibrationproof member, even in the case where a load is tilted largely by the wind pressure or an earthquake on the start or stop of the load and an aseismic elastic member installed on the stopper makes the springy contact with an aseismic frame. CONSTITUTION:A vibration control board is constituted of a base board 1, vibrationproof member 3 installed on the base board 1, load supporting board 2 which is placed on the vibrationproof member 3, stopper 5 which is suspended on the load supporting board 2 and is inserted into a through hole on an aseismic frame 6 formed on the base board 1, and a pair of aseismic elastic members 8a and 8b which are arranged above and below the aseismic frame 6, keeping a gap E, and installed on the stopper 5. The opposed surfaces of the aseismic frames 6 of the aseismic members 8a and 8b are constituted of a ring-shaped wall part, around the stopper 5, and a recessed groove opened on t he opposed surface is formed at the ring-shaped wall part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-vibration table with an anti-seismic stopper that exhibits an effective anti-seismic function at the time of starting / stopping on-board equipment or when a strong wind or an earthquake occurs.

[0002]

2. Description of the Related Art An anti-vibration table is composed of a base (1 '), a load carrying table (2') and a vibration isolator (not shown), and an air conditioner is installed on the load carrying table (2 '). A load (4 ') such as an outdoor unit is installed, and the vibration generated from the load (4') due to the operation of the load (4 ') is absorbed by the anti-vibration member, and the load (4') is placed on the installation surface of the base (1 '). This is to prevent the vibration of 4 ') from being transmitted.

As described above, the load (4 ') is usually installed outdoors, and it may be shaken by the influence of wind or, in extreme cases, may fall due to the influence of an earthquake.
Therefore, the load (4 ') sways with a certain amplitude or more, and the load carrier
In order to prevent the load carrier (2 ') from further tilting when (2') is tilted according to the amplitude and is in a dangerous state, the stopper (5 'is removed from the load carrier (2'). ') Vertically, insert this stopper (5') into the through hole of the earthquake resistant frame (6 ') provided on the base (1'), and use it for earthquake resistance above and below the earthquake resistant frame (6 '). Elastic member (8
a ') (8b') is installed, and there is a constant gap (E ') with the seismic frame (6').
It was fixed to the stopper (5 ') in a loose manner.
When the large shake occurs, the seismic resistant elastic members (8a ') (8b') are elastically mounted on the seismic resistant frame (6 ') to support the load carrier.
It is designed to stop the slope of (2 ') above a certain limit.

However, in such a case, since the seismic resistant elastic members (8a ') (8b') are merely disc-shaped, the seismic resistant elastic members (8a ') (8b') are Although the shock is buffered to some extent when it is contact-compressed with (6 '), its spring constant is relatively large, and a sudden shock force (such as when the load (4') is started or stopped or an earthquake occurs). 4 ') added, seismic resistant elastic member
When (8a ') (8b') impacts the seismic frame (6 '),
Although the load (4 ') can be prevented from falling, an impact force is generated, and the shocking vibrations are transmitted to the foundation through the seismic frame (6') and the base (1 '), and the vibration isolator is removed on this surface. The vibration performance will be impaired.

In addition, the seismic resistant elastic members (8a ') and (8b') must be installed so that there is a constant gap (E ') with the seismic resistant frame (6'). There is a problem that it is complicated to attach the seismic resistant elastic members (8a ') and (8b') to the stopper (5 ') so as to be constant, which is a site work.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the problems of the conventional example, and the object thereof is to significantly tilt the load due to wind pressure or an earthquake when starting or stopping the load. Even if the anti-vibration elastic member works to prevent vibration, the anti-vibration member does not impair the anti-vibration effect of the anti-vibration member, and it is very easy to attach the anti-vibration elastic member to the stopper. To provide.

[0007]

[Means for Solving the Problems]
(1), a vibration isolating member (3) installed on the base (1), a load carrying table (2) placed on the vibration isolating member (3), and a load carrying table (2)
Seismic frame (6) with a stopper (5) inserted vertically through the through hole (7) of the seismic frame (6) formed on the base and a gap (E)
It is composed of a pair of seismic resistant elastic members (8a) and (8b) arranged above and below the stopper (5), and the seismic resistant elastic member (8a ) (8b)
The opposing surface of the seismic resistant frame (6) is composed of ring-shaped wall parts (12a) and (12b) centering on the stopper (5).
In b), the concave grooves (13a) and (13b) opening to the facing surface are formed ”.

At the time of starting and stopping the load (4), on a windy day,
Or when an earthquake occurs and an external force is applied to the load (4) and a large shake occurs and the load carrying base (2) is largely tilted, the seismic elastic member (8b) on the tilted side is compressed at the same time. The seismic resistant elastic member (8a) on the opposite side is also compressed, but at this time, the contact area of the ring-shaped buffer wall (12a) with the seismic resistant frame (6) gradually increases due to the strength of the shaking. The spring constant is increased, the braking effect against the shake is increased according to the magnitude of the shake, and the spring constant can be changed according to the vibration. Therefore, even if the seismic resistant elastic member (8a) of the stopper (5)
Even if (8b) makes elastic contact with the earthquake-resistant frame (6), it will effectively prevent sway without transmitting vibration to the base (1) side.

Further, in claim 2, "the length of the seismic resistant elastic members (8a) (8b) of the stopper (5) is equal to the seismic resistant elastic member (8a)"
It is prescribed in advance that a gap (E) is formed between (8b) and the seismic frame (6). "

As a result, by simply attaching the seismic resistant elastic members (8a), (8b) in accordance with the provisions of the stopper (5), an accurate gap can be obtained.
(E) can be formed, and on-site work can be extremely simplified.

[0011]

[Example] Anti-vibration table with seismic stopper (A) according to the present invention
Is composed of a base (1), a load carrier (2), a vibration isolator (3), and a seismic resistant mechanism (B). The base (1) is rustproof steel or F
It is a structure in which the RP material is framed in a rectangle or a structure made of reinforced concrete, and an inverted U-shaped seismic resistant frame (6) is attached to its four corners. The seismic frame (6) is provided with through holes (7).

Like the base (1), the load carrying base (2) is also formed by arranging rustproof steel or FRP material in a rectangular frame, and the stoppers (5) are hung from the four corners thereof. There is. The vibration damping member (3) is composed of an upper member (3a), a lower member (3b), and a spring material (not shown) housed inside,
The load carrier is installed between the base (1) and the load carrier (2).
(2) It has a function of carrying the load of the load (4) placed on it and absorbing and absorbing the vibration generated from the load (4).
The anti-vibration member (3) will be installed in a plurality of places at appropriate places between the base (1) and the load carrying base (2) in consideration of the position of the center of gravity of the load (4).

The vibration-proof mechanism (B) comprises the stopper (5), the earthquake-proof frame (6), and the earthquake-proof elastic members (8a), (8b). Since the seismic resistant elastic members (8a) and (8b) have the same shape and are simply installed symmetrically, the seismic resistant elastic member (8a) will be described here as a representative. The seismic resistant elastic member (8a) attached to the stopper (5) includes a backup plate (10a) and a rubber seat (11a). Reference numeral (10a) is a disk-shaped backup plate, and the rubber seat (11a) is adhered or abutted on one surface thereof.

The rubber seat (11a) is a cylindrical portion (16a) through which the stopper (5) is inserted, and a flange portion projecting from one end of the cylindrical portion (16a).
(17a) and a ring-shaped buffer wall (12a) protruding from the flange (17a) in the same direction as the cylindrical portion (16a).
A plurality of (13a) are formed at appropriate locations on the ring-shaped buffer wall (12a). In this embodiment, the concave groove (13a) is a semicircular groove (14a
a) and V groove (15a), and (14a) is a collar (17a).
It is a shallow semi-circular groove that does not reach to (15a), and (15a) is a deep V-shaped groove that reaches the flange (17a). The height of the cylindrical portion (16a) is slightly higher than the height of the ring-shaped cushioning wall portion (12a), and when it is inserted into the stopper (5) and attached to the earthquake-resistant frame (6) as shown in FIG. (16a) and (16b) are in contact with each other from the upper and lower sides of the seismic frame (6). The rubber seat (11a) is made of a rubber material or a sponge material in this embodiment.

The method of attaching the seismic resistant elastic members (8a) and (8b) will be described. As shown in FIG. 5, the seismic resistant elastic members (8a)
(8b) is placed above and below the seismic resistant frame (6), and the stopper (5) is the elastic member for seismic resistance (8a), the through hole (7) of the seismic resistant frame (6) and the elastic member for seismic resistance.
Insert it through (8b), attach the stopper (5) to the lower surface of the load carrying base (2), and secure with the mounting nut (9). The seismic resistant elastic members (8a) and (8b) arranged above and below the seismic frame (6) are stoppers (5).
The bolt head (20) and the fixing nut (19) screwed into the stopper (5) are clamped and fixed. Here, the cylindrical portion (16a) (16b) is inserted into the through hole (7) of the seismic resistant frame (6), and although the cylindrical parts (16a) (16b) are elastically contacted with each other, the seismic resistant frame (6) Do not touch. The ring-shaped cushioning wall portions (12a) and (12b) are also separated from the earthquake-resistant frame (6) to form a gap (E).

Here, the length of the portion of the stopper (5) below the neck where the screw is not formed is such that when the cylindrical portions (16a) and (16b) are tightened from both sides, the ring-shaped cushioning wall portion (12a). ) Is an earthquake resistant frame
The length is set so that a gap (E) can be formed apart from (6) by a predetermined dimension. As a result, seismic resistant elastic member (8a)
Attach (8b) to the stopper (5) and tighten the fixing nut (19) screwed into the stopper (5) to the end of the screw to stop the stopper.
By pinching and fixing with the bolt head (20) and the fixing nut (19) of (5), it will be automatically attached with the above-mentioned gap (E) secured, making field work very easy. Become.

Then, the load (4) is placed on the load carrier (2) and the load (4) is operated. The vibration generated from the load (4) is effectively absorbed and buffered by the anti-vibration member (3).
Vibration is not transmitted to the foundation via (1). However, when the load (4) is started / stopped, when there is a windy day, or when an earthquake occurs, an external force is applied to the load (4) and a large shake occurs, causing the load carrier (2) to load (4). ) Will be greatly inclined. At this time, the seismic resistant elastic member (8b) on the inclined side is compressed, and at the same time, the seismic resistant elastic member (8a) on the opposite side is also compressed, which effectively prevents the tilt from shaking.

Here, the semi-circular groove (14a) and the V groove (1
5a) is formed, the contact area of the ring-shaped buffer wall (12a) with the earthquake-resistant frame (6) gradually increases due to the strength of the shaking, and the spring constant increases, which corresponds to the magnitude of the shaking. And increase the damping effect. Thus, the seismic resistant mechanism of the present invention (B)
Can change the spring constant according to the vibration. Since the V groove (15a) is formed up to the collar portion (17a), when rain falls on the seismic resistant mechanism (B) and rainwater collects, it is effectively discharged from here.

[0019]

Since the present invention has the above-mentioned structure,
Even if the seismic elastic member mounted on the stopper works when the load on the anti-vibration table installed outdoors is greatly tilted at the time of starting / stopping or due to wind pressure or an earthquake, its spring is adjusted according to the size of the tilt. There is an advantage that the constant does not change and the vibration isolation effect of the vibration isolation member is not impaired. In addition, since the mounting amount of the seismic resistant elastic member is specified in advance, there is also an advantage that an accurate mounting work can be performed only by performing on-site work according to the specification.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of the present invention.

FIG. 2 is a plan view of a vibration isolation table with a seismic stopper according to the present invention.

3 is a front view of FIG.

FIG. 4 is a side view of FIG.

FIG. 5 is an enlarged front view of the seismic resistant mechanism portion according to the present invention.

FIG. 6 is a plan view of a seismic resistant elastic member used in the present invention.

FIG. 7 is a front view of FIG.

FIG. 8 is a front view of a conventional example.

[Explanation of symbols]

 (1) ... Base (2) ... Load carrying base (3) ... Vibration isolator (5) ... Stopper (6) ... Earthquake-resistant frame (E) ... Gap (8a) (8b) ... Earthquake-resistant elastic member

Claims (2)

[Claims] 1. A base, an anti-vibration member installed on the base, a load carrying base mounted on the anti-vibration member, and a seismic resistance formed vertically on the load carrying base and formed on the base. An anti-vibration table with an anti-seismic stopper that consists of a stopper that is inserted into the through hole of the frame and a pair of anti-vibration elastic members that are installed above and below the anti-seismic frame with a gap and are attached to the stopper. With a seismic resistant stopper, characterized in that the opposing surface of the seismic resistant frame of the elastic member is composed of a ring-shaped wall portion centering on the stopper, and a concave groove opening to the opposed surface is formed in the ring-shaped wall portion. Vibration isolation table. 2. The installation length of the seismic resistant elastic member of the stopper is defined in advance so that a gap is formed between the seismic resistant elastic member and the seismic resistant frame.
Anti-vibration table with seismic stopper described in.