JPH0647149Y2 - Horizontal anti-vibration mechanism of anti-vibration table - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a horizontal anti-vibration mechanism for a new anti-vibration table.

(Prior Art and Problems Thereof) External vibration transmitted to a device mounted on a vibration isolation table is not only vertical vibration but also horizontal vibration. However, the conventional anti-vibration table has been provided with an anti-vibration mechanism focusing only on the vibration in the vertical direction, but recently, it has been revealed that horizontal anti-vibration cannot be neglected.

Therefore, various methods and mechanisms have been adopted from the past, but they are only unsatisfactory to be applied to actual models such as mechanically too complicated and device cost too high.

(Purpose of the present invention) The present invention has been made in view of the above-described conventional example, and the purpose thereof is that the cost is low, the mechanism is simple, and the elastic coefficient can be appropriately changed, and is easily applied to an actual machine. The purpose is to provide a useful horizontal anti-vibration mechanism for the anti-vibration table.

(Means for Solving the Problems) In the first aspect of the present invention, in order to achieve the above-mentioned object, the upper anti-vibration device is mounted via the vibration absorber (2) mounted on the lower anti-vibration table (1). The shaking table (3) is carried, and the vibration-proof cylinder (4) is provided on the facing surface of either one of the upper and lower vibration-proofing tables (1) and (3).
And a vibration absorbing member (5) protruding from the opposite surface of the other vibration isolating base is fitted into the vibration isolating cylinder (4) so that the outer peripheral surface of the vibration absorbing member is gradually tapered toward the insertion end. The technical means of doing so is adopted, and in the second item; the elastic projection (6) is provided so as to project on the outer peripheral surface of the vibration absorbing member (5).

The technical means called is adopted.

(Operation) In the horizontal anti-vibration mechanism of the anti-vibration table (A) configured as described above, when the external vibration in the horizontal direction is transmitted, the anti-vibration member (5) fitted in the anti-vibration cylinder (4) It contacts the inner peripheral surface of (4) and absorbs horizontal vibration. Further, since the outer peripheral surface of the vibration absorbing member (5) is formed so as to be gradually narrowed toward the insertion end, the elastic coefficient can be easily changed by changing the insertion allowance.

Here, when the elastic protrusion (6) is provided on the outer peripheral surface of the vibration absorbing member (5) as in the second term, the elastic protrusion (6) is pressed.
Crushes to some extent to form a soft contact and does not significantly impair the vertical vibration absorption function.

(Embodiment) Hereinafter, the present invention will be described in detail with reference to illustrated embodiments. The lower anti-vibration table (1) and the upper anti-vibration table (3) are, for example, an angle welded structure or a composite of the same and a concrete member, or a molded product of synthetic resin. In the illustrated embodiment, the upper anti-vibration table is used. Antivibration cylinders (4) are provided at 3 to 4 positions on the facing surface of (3). The lower vibration isolation table (1) is provided with a gate type fixed frame (7) facing the vibration isolation cylinder (4), and the vibration absorption member (5) is attached to the gate type fixed frame (7). . The main body of the vibration absorbing member (5) is made of rubber, and the bolt (9) is projected from the washer (8). The rubber material may be cylindrical, or as shown in the figure, it is shaped like a truncated cone that tapers toward the tip (the insertion end), and the outer peripheral surface of which is recessed in the axial direction. An elastic protrusion (6) is provided so as to form a groove (10). Of course, the protrusion is not limited to the one shown in the figure, and it may be a protrusion, or the elastic protrusion (6) may not be provided if the main body is sufficiently soft. The vibration-absorbing member (5) is fitted in the vibration-proof cylinder (4). By increasing the insertion allowance, the contact pressure between the vibration-proof cylinder (4) and the main body is increased and the spring constant is increased. It will be a matter.

The vibration absorber (2) is composed of a lower half portion (11) of the upper opening, an upper half portion (12) of the lower opening that is loosely fitted in this, and a built-in compression spring (13). It is disposed between the facing surfaces of the shaking table and carries an upper vibration damping table (3). Further, in order to prevent the vibration absorbing tool (2) from being damaged due to an excessively large horizontal displacement between the upper and lower vibration isolating stands due to an earthquake or the like, a stopper bolt (14) screwed to the upper antivibration stand (3) is provided. ) Is loosely fitted in a through hole (15) formed in the gate type fixed frame (7).

Then, a predetermined device is installed and operated on the vibration isolation table configured as described above, but when external vibration in the vertical direction is transmitted, the compression spring (13) of the vibration absorber (2) described above is transmitted. Effectively absorbs vibration and prevents vertical vibration from being transmitted to the device. On the other hand, when the external vibration in the horizontal direction is transmitted, the vibration absorbing member (5) fitted in the vibration isolating cylinder (4) comes into contact with the inner peripheral surface of the vibration isolating cylinder (4) and the elastic protrusion on the outer peripheral surface. (6) is crushed with elasticity to some extent easily, and this makes a soft contact, and performs horizontal vibration absorption without significantly impairing the vertical vibration absorption function.

Further, when the spring constant is not appropriate for horizontal vibration, the vibration absorbing member (5) is used which is formed so that the outer peripheral surface is gradually narrowed toward the insertion end as described in item 3. By changing the insertion allowance into the vibration-proof cylinder (4), the elastic coefficient can be easily changed to obtain an appropriate elastic coefficient.

(Effect) The present invention, as described above, carries the upper vibration isolation table via the vibration absorber mounted on the lower vibration isolation table, and the vibration isolation of either one of the upper and lower vibration isolation tables is made to face each other. An anti-vibration cylinder is provided on the opposing surface of the table, and a vibration-absorbing member protruding from the opposing surface of the other anti-vibration table is fitted into this anti-vibration tube, so when external horizontal vibration is transmitted There is an advantage that the vibration absorbing member fitted into the cylinder elastically and flexibly contacts the inner peripheral surface of the vibration proof cylinder and can absorb the horizontal vibration without deteriorating the vertical vibration absorption performance.

Further, since the outer peripheral surface of the vibration absorbing member is formed so as to become gradually thinner toward the insertion end, there is an advantage that the elastic coefficient can be easily changed by changing the insertion allowance into the vibration isolating cylinder.

Further, when the elastic protrusion is provided on the outer peripheral surface of the vibration absorbing member as in the second item, the pressed elastic protrusion is more easily elastically crushed and becomes a soft contact, greatly impairing the vertical vibration absorbing function. There is nothing.

[Brief description of drawings]

 Fig. 1 ... plan view of an embodiment of the present invention Fig. 2 ... front view of an embodiment of the present invention Fig. 3 ... side view of an embodiment of the present invention Fig. 4 ... of the present invention Enlarged front view of the vibration isolating part Fig. 5 …… Plan view of the vibration absorbing member of the present invention (A) …… Vibration isolator (1) …… Lower vibration isolator, (2) …… Vibration absorber (3)… … Upper vibration isolation table, (4) …… Vibration isolation cylinder (5)… Vibration absorbing member, (6)… Elastic protrusion (7)… Gate type fixed frame, (8)… Washer (9)… … Bolt, (10) …… Concave groove (11) …… Lower half, (12) …… Upper half (13) …… Compression spring, (14) …… Stopper bolt (15) …… Through hole

Claims (2)

[Scope of utility model registration request] Claim: What is claimed is: 1. An upper vibration isolating table is supported via a vibration absorber mounted on the lower vibration isolating table, and the upper and lower vibration isolating tables are provided with vibration isolating on one of the opposing surfaces of the vibration isolating table. A cylinder is provided, and a vibration absorbing member protruding from the opposite surface of the other vibration isolating base is fitted into the vibration absorbing cylinder, and the outer peripheral surface of the vibration absorbing member is formed so as to become gradually thinner toward the insertion end. A horizontal anti-vibration mechanism for the anti-vibration table. 2. A horizontal anti-vibration mechanism for an anti-vibration table according to claim 1, wherein an elastic projection is provided on the outer peripheral surface of the anti-vibration member.