JP2013199962A - Rolling prevention mechanism and vibration isolating frame with the mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rolling prevention mechanism and a vibration isolating frame with the mechanism whose upper frame does not turn over together with a device against a giant earthquake involving three-dimensional shakes.SOLUTION: A rolling prevention mechanism (B) is disposed on both sides of a load (W) installed on a vibration isolating frame (A) and supports side surfaces of the load (W), respectively, and is characteristically constituted by a support column (20) erected on a floor surface (50) or a lower frame (1) of the vibration isolating frame (A), and swings with resilient force in a direction of the load (W), and a contact support body (25) attached to a front end portion of the support column (20) so as to move in contact on the side surface of the load (W) in a longitudinal direction.

Description

  The present invention relates to a rolling prevention mechanism that can effectively prevent a swing and a fall that exceed the allowable range of a load placed on a vibration isolator even if a large earthquake occurs, and a vibration isolator with the mechanism.

  Conventionally, as an anti-vibration device for a building power supply or mechanical equipment installed in a factory, an anti-vibration stand has been widely used as a device for blocking vibration generated from these devices or vibration transmitted from the installation surface to these devices. .

  This anti-vibration base is composed of a lower base installed on the floor, an upper base on which a device as a load is placed, and a plurality of anti-vibration mounts installed between them, and coil springs supporting the upper base as main components. And a stopper mechanism that suppresses the relative movement in the horizontal direction and the vertical direction between the upper and lower frames within a certain range. As a result, the normal vibration generated from the device or the vibration in the reverse direction (vibration from the floor side) as described above, the vibration between the upper frame and the lower frame is caused by the action of the coil spring of the vibration isolator. Transmission can be effectively suppressed.

  As described above, as a reverse sway, the stopper member and the seismic frame are affected even by a typhoon-like wind pressure or a small-scale earthquake. The horizontal or vertical relative movement between the upper and lower mounts is restricted within a certain range by the stopper mechanism configured in this way, and the upper mount is greatly swung over the allowable value and tilted. I am trying to regulate so that it won't fall.

  In that case, when the seismic frame collides with the stopper member, a large impact is applied, and there is a risk of damaging the device that is the load.Therefore, a pair of seismic frames are provided above and below the seismic frame with a gap around the stopper member. The elastic disk member was installed, so that the load was greatly shaken by wind pressure and small-scale earthquakes as well as when starting and stopping the load, and the earthquake-resistant elastic member attached to the stopper member worked against the earthquake-resistant frame. However, there has been proposed one that does not significantly impair the vibration isolation effect of the vibration isolation member (Patent Document 1).

JP-A-7-208542

  However, according to the present invention, when the upper frame is swung and tilted, the earthquake-resistant elastic member runs idle in the gap until the earthquake-resistant elastic member elastically contacts the earthquake-resistant frame due to the presence of the gap. When contacting the seismic frame, although it is an elastic member, it impacts the seismic frame impactively. This impact is not a problem in the case of normal wind pressure, vibration, or shaking, but in the case of a huge earthquake, it becomes a huge impact and not only breaks the stopper mechanism, but also the upper frame falls down with the equipment. . The stopper member according to the present invention is effective to some extent against vertical vibration and rolling in the direction of compressing the rolling elastic member for earthquake resistance, but has little effect on horizontal shaking.

  The present invention has been made in view of such problems, and with respect to a huge earthquake accompanied by three-dimensional shaking in the horizontal direction and the vertical direction, the upper frame rolls and tilts greatly together with the device, and the device is damaged. An object of the present invention is to provide a rolling prevention mechanism and a vibration isolator with the same mechanism.

The invention according to claim 1 is a rolling prevention mechanism (B) which is disposed on both sides of a load (W) installed on the vibration isolator (A) and supports the side surfaces of the load (W). ,
A support column (20) which is erected on the floor (50) or the lower frame (1) of the vibration isolation frame (A) and swings with elasticity in the load direction;
It is characterized by comprising a contact support (25) attached to the tip of the support column (20) so as to move while contacting the side surface of the load (W) in the vertical direction.

The invention according to claim 2 is a vibration isolator (A) to which the rolling prevention mechanism (B) according to claim 1 is added.
A lower frame (1) installed on the floor (50);
An upper frame (10) on which a load (W) is installed;
A vibration isolator (30) installed between the upper frame (10) and the lower frame (1) and supporting the upper frame (10);
Located on both sides of the load (W) installed on the anti-vibration mount (A), standing on the floor (50) or the lower stand (1) of the anti-vibration mount (A), and elastic in the load direction A support column (20) that swings with
It is characterized by comprising a contact support (25) attached to the tip of the support column (20) so as to move while contacting the side surface of the load (W) in the vertical direction.

  The invention described in claim 3 further limits claim 2 and is characterized in that an elastic tension member (26) is provided between the contact supports (25) arranged on both sides of the load (W). And

  The invention described in claim 4 further limits claim 3 and is characterized in that the contact support (25) is a sliding plate or a rolling element.

  A contact support (25) is attached to the tip of the support column (20) that swings with elasticity in the load direction, and the contact support (25) slides or rolls on the side of the load (W). Because it is mounted so that it moves, a huge three-dimensional vibration is input to the anti-vibration frame (A) and there is a large three-dimensional relative deviation between the upper frame (10) and the lower frame (1). When trying to occur, the stopper member does not collide impactively with the elastic member for earthquake resistance as in the prior art, and the support column (25) is provided via the contact support (25) from the beginning of the three-dimensional relative deviation occurrence. 20) is greatly bent to convert a part of vibration energy into heat. As a result, the amount of flexure of the vibration isolator (30) is limited by the amount of flexure of the support column (20), and the shaking is greatly suppressed, so that it does not tilt significantly due to rolling. As a result, in addition to avoiding damage to the mounting load (W) itself mounted on the upper frame (10), it is connected to a member for connection with an external device, for example, a terminal (T) There is no such thing as external wiring breaking.

  Furthermore, if the contact supports (25) are connected to each other by elastic tension members (26), the contact supports (25) on both sides of the load (W) are subjected to huge three-dimensional vibrations on the anti-vibration stand (A). When an input is made, the elastic support member (26) causes the contact supports (25) on both sides to constantly touch the side surface of the load (W) and sway while rolling, making contact on the side surface of the load (W). The support (25) will not jump. As a result, the load (W) rolling can be effectively suppressed. When the contact support (25) is a rolling element, the load (W) moves smoothly on the side surface, and the rolling suppression effect can be further enhanced.

It is a front view of the state which loaded the load on the vibration isolator equipped with the rolling prevention mechanism of this invention. It is a side view of FIG. It is a perspective view of the vibration isolator stand of FIG. It is a rear view of the rolling prevention mechanism of this invention. FIG. 5 is a side view of FIG. 4. It is an expanded sectional view of FIG. It is a side view of the front-end | tip part of the other rolling prevention mechanism of this invention. It is a partial expanded partial sectional view of the stopper mechanism of the present invention.

  The present invention will be described below with reference to the drawings. In the first embodiment, as shown by the solid lines in FIGS. 1 and 2, a rolling prevention mechanism (B) is arranged on both sides of the load (W) to suppress the rolling of the load (W). As shown by the phantom line, both contact supports (25) are pulled by the elastic tension member (26) so that the contact support (25) is always in contact with the side surface of the load (W). The first embodiment will be described below.

  The anti-vibration base (A) consists of a lower base (1), an upper base (10), an anti-vibration tool (30), and a stopper mechanism (D) provided as necessary. It is provided on both sides. In the first embodiment, the rolling prevention mechanism (B) is fixed to the floor (50) independently of the lower frame (1), and may be attached to the lower frame (1). Here, the former case will be described.

  The lower pedestal (1) is configured in a rectangular shape with corner members (2) arranged at the four corners, and two lower and lower frames (3) and (4) welded between the opposing faces of the corner members (2). ing. The corner member (2) is composed of an L-shaped side piece (2a), a lower piece (2b) welded to the upper and lower sides thereof, and an upper piece (2c), and an anchor bolt hole ( 2d) is drilled. The lower end of the stopper bolt (41) of the stopper mechanism (D) is attached to the upper piece (2c) with a nut hook.

  The upper frame (10), like the lower frame (1), combines two upper and lower frames (13) and (14) into a rectangular shape, and a stopper mounting plate (on the lower edge outside the shorter upper frame (14)). 12) are integrally welded, and a reinforcing plate (12a) is welded to the corners of the ends of the upper frame (14) and the stopper mounting plate (12). Two mounting frames (15) are suspended between the longer upper frame (13) to form a mounting hole (16). Furthermore, the inside of the upper frame (10) is filled with concrete (17).

  The vibration isolator (30) has a well-known structure, and is formed with a base (31) and a hollow bellows attached to the base (31) with a bottom opening, an upper end closed, and a multi-stage bellows. The bellows member (32) and a coil spring (33) provided in the bellows member (32), and a lower frame (34) by a slide groove (34) provided on the bottom surface of the base (31). 3) It can be moved on (4) and installed at an arbitrary place, and the upper frame (10) is supported by the coil spring (33) of the bellows member (32). The vibration isolator (30) is installed at a plurality of locations on the lower frames (3) and (4).

  As shown by the solid lines in FIGS. 4 and 5, the first embodiment of the rolling prevention mechanism (B) is composed of a support column (20) and a contact support (25), and the support column (20) is a floor surface. A base (21) fixed to (50), a column member (22) standing on the base (21), and a support attachment portion (23) attached to the tip of the column member (22) Has been.

  The column member (22) has a base (22a) mounted perpendicularly to the base (21) and is bent in a square shape in the load (W) direction from the tip of the base (22a), and is elastic in the load (W) direction. It is comprised with the leaf | plate spring part (22b) formed with the leaf | plate spring which rock | fluctuates with force. In the figure, for simplification, the base (22a) and the leaf spring (22b) are shown integrally, but they are separated and integrated with a fastener such as a bolt and nut not shown. Has been. Of course, the base portion (22a) and the leaf spring portion (22b) may be formed of an integral leaf spring and swing from the base portion (22a).

  The support attachment part (23) includes a body part (23a) attached to the leaf spring part (22b), an arm part (23b) extending from both ends of the body part (23a) in the load (W) direction, and the arm part. (23b) and a cylindrical rolling shaft (23c) mounted horizontally.

  In this case, the contact support (25) is a cylindrical roller, but although not shown, the support attachment portion may be formed in a bowl shape and the spherical contact support (25) may be fitted. When the contact support (25) is a roller, it is attached so as to rotate around the rolling shaft (23c). In the case of a contact support (25), especially a roller, the material is a rubber-like elastic material or a material such as a low-resilience rubber, or an appropriate material such as a metal or a resin. A low resilience rubber or the like is preferable from the viewpoint of vibration absorption. Further, as described above, the entire contact support (25) may be composed of an elastic material or the above material, or may be composed of a contact outer layer (25a) and an inner layer (25b), with the other being one of the other. You may make it hard. Although not shown, an elastic protrusion may be provided on the surface of the contact support (25). In this case, it is desirable that the elastic protrusion is made of a low rebound rubber. Of course, the elastic protrusions may be formed of a hard material, and the inner layer may be formed of softer low-rebound rubber. In any case, the hardness of the contact outer layer (25a) and the inner layer (25b) may be changed. The inner layer (25b) is preferably formed from a plurality of layers instead of a single layer, and the hardness of each layer is changed in view of vibration energy absorption. Although the above case is a case where the contact support (25) is a rolling element, the contact support (25) may be formed of a curved plate as shown in FIG. In this case, it comes into sliding contact.

  Stopper mechanism (D) is provided as necessary, and in the case of this example, it is composed of stopper bolt (41), rubber washer (42), anti-vibration washer (43), washer (44) and nut (45). Has been. The lower part of the stopper bolt (41) is inserted into the bolt hole of the upper piece (2c) of the corner member (2), and is fastened with a nut from above and below via a washer (44). The upper part of the stopper bolt (41) is inserted into the through hole of the rubber washer (42) attached to the stopper hole (12b) drilled at both ends of the stopper mounting plate (12), and above the stopper hole (12b). A nut (45) for restricting upward deflection is fixed to the base. Between the lower surface of the rubber washer (42) and the nut (45) on the upper piece (2c) of the corner member (2), the lower surface of the rubber washer (42) and the nut (45) are not in contact with each other. A vibration reducing washer (43) is screwed onto the stopper bolt (41). Of course, since the rolling prevention mechanism (B) is provided in the present invention, the stopper mechanism (D) is not necessarily required.

  The anti-vibration mount (A) according to the present invention includes a floor surface (50) with anchor bolts (51) planted on the floor surface (50) using the anchor bolt holes (2d) of the corner member (2). The anti-rolling mechanism (B) is fixed to the floor (50) on both sides of the anti-vibration stand (A), and the roller (25) of the anti-rolling mechanism (B) is attached to the side of the load (W). It is arranged so that it touches lightly.

  The upper frame (10) was placed and supported on the vibration isolator (30), and was placed on the upper frame (10) using the mounting holes (16) of the mounting plate (15) of the upper frame (10). The load (W) is fixed. When the load (W) is an electrical facility such as a transformer, external wiring (not shown) is connected to the terminal (T) on the upper surface.

  Under such installation conditions, when a huge earthquake hits the floor (50), the floor (50) shakes greatly in three dimensions, and the lower frame (1) fixed to the floor (50) due to the influence, A three-dimensional relative displacement tends to occur between the upper frame (10) supported by the vibration isolator (30) and attached with a heavy load (W). As a result, when the load (W) is an electrical facility such as the above-mentioned transformer, in the conventional case, this is greatly shaken and does not fall down, but the external wiring connected to the terminal (T) on the top surface is torn off Although large damage occurs, in the present invention, on both sides of the load (W), the contact support (25) of the rolling prevention mechanism (B) is in contact with both sides of the load (W) from the beginning as described above. Therefore, the contact support (25) is pressed by the side surface of the load (W) without causing an impact collision, and the leaf spring portion (22b) of the column member (22) is bent. And since the amount of energy consumption increases with the gradual increase of the amount of bending, generation | occurrence | production of a big relative displacement, ie, a big rolling, can be suppressed efficiently. In other words, the amount of movement of the upper frame (10) that causes a three-dimensional relative displacement for both the load (W) is basically limited to the amount of bending of the leaf spring portion (22b). At this time, it is the contact support (25) that is in contact with the side surface of the load (W) .If this is formed of an elastic material or low-elasticity rubber, the vibration isolator (30) Does not significantly impair performance.

  If the amount of bending of the leaf spring (22b) exceeds the allowable displacement of the stopper mechanism (D), the stopper bolt (41) collides with the rubber washer (42) and the stopper mechanism (D) The stopper function acts, and the large three-dimensional relative displacement of the upper frame (10) with respect to the lower frame (1) is suppressed, and the swing of the load (W) is minimized. In this case, vibration energy is caused by the bending of the leaf spring portion (22b) described above (when the roller (25) is formed of an elastic material or low-elasticity rubber, this also contributes to suppression of three-dimensional relative displacement). Is converted into heat, and the impact energy generated in the stopper mechanism (D) is reduced by that amount, and the impact is alleviated.

  In addition, when the vibration reduction washer (43) is provided, the vibration reduction washer (43) is attached to the upper rubber washer (42), stopper mounting plate (12), lower nut (45) and upper piece (2c). Damage occurs due to contact, and the impact energy is further reduced than this damage, and in combination with the anti-rolling mechanism (B), severe shaking (rolling) is prevented. In particular, when the load (W) is a transformer as described above, the connection between the terminal (T) of the transformer and the cord of the external device is not damaged.

  In the above case, the anti-rolling mechanism (B) is installed independently on the anti-vibration mount (A), but as shown by the phantom line, the lower base (1) of the anti-vibration mount (A) is long. The extension plate portion (1e) may be extended from the outer surface of the lower side frame (3), and the rolling prevention mechanism (B) may be fixed to the extension plate portion (1e). In that case, although not shown, the base (21) can be moved close to and away from the load (W) so that the roller (25) just contacts the load (W). .

  Further, as shown by the phantom line in FIG. 1, a plurality of anti-rolling mechanisms (B) may be arranged on the side surface of the load (W). This is suitable for suppressing rolling when the load (W) sways so as to swell.

  Next, a second embodiment using the elastic tension member (26) will be described. In the figure, the part indicated by the phantom line is the second embodiment. The spring mounting shaft (23d) is extended from both ends of the roller shaft (23c) of the anti-rolling mechanism (B), and outside the load (W). The spring mounting shafts (23d) on both sides of the load (W) are connected by an elastic tension member (26), such as a tension coil spring or a rubber belt. In this way, when the load (W) sways violently, the rollers (25) on both sides are always attracting with elasticity, so it follows the swaying of the load (W) without jumping, and both rollers (25) does not leave the load (W) side. As a result, rolling can be prevented efficiently. Since the other points are the same as the first embodiment, the description of the first embodiment is incorporated into the description of the second embodiment.

(A) Anti-vibration base (B) Rolling prevention mechanism (W) Load (1) Lower base (10) Upper base
(12) Stopper mounting plate (20) Support column (25) Roller (25a) Contact outer layer (25b) Inner layer (30) Vibration isolator (50) Floor

Claims (4)

An anti-rolling mechanism that is arranged on both sides of a load installed on a vibration isolator and supports the side surfaces of the load,
A support column that is erected on the floor surface or the lower frame of the vibration isolation frame and swings with elasticity in the load direction;
A rolling prevention mechanism comprising: a contact support attached to a tip portion of a support column so as to move while contacting a side surface of a load in a vertical direction. A lower frame installed on the floor,
An upper frame on which the load is installed;
A vibration isolator installed between the upper frame and the lower frame and supporting the upper frame;
Support columns that are placed on both sides of the load installed on the anti-vibration frame, are erected on the floor surface or the lower frame of the anti-vibration frame, and swing with elasticity in the load direction.
A vibration isolator with a rolling prevention mechanism comprising a contact support attached to a tip portion of a support column so as to move while contacting a side surface of a load in a vertical direction.   The anti-vibration stand with a rolling prevention mechanism according to claim 2, wherein an elastic tension member is provided between the contact supports arranged on both sides of the load. The anti-vibration stand with a rolling prevention mechanism or a rolling prevention mechanism according to any one of claims 1 to 3, wherein the contact support is a sliding contact plate or a rolling element.

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