JP2013108523A - Quake-reducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a quake-reducing device capable of responding, by one kind, to a load which has various kinds of support legs and a load which has no support leg.SOLUTION: The quake-reducing device A includes: a mounting plate 3 on which the load M is mounted; a support base stand 1 composed of a support plate part 4 in which the mounting plate 3 is mounted on an upper surface 4a thereof and slides, and a stopper wall part 6 which is disposed on an upper surface 4a of the support plate part 4 and in which there is formed stopper groove 7, into which the edge part 3a of the mounting plate 3 can be inserted, on a side surface 6a of the mounting side of the mounting plate 3; an elastic member 5 for floor surface installment laid on the lower surface 4b of the support plate part 4; and a soft member 8 arranged in the stopper wall part 6.

Description

  The present invention relates to a seismic reduction device that reduces the kinetic energy of an earthquake, and is particularly mounted on a protection target device such as a power machine, a work machine, a measurement machine, an information / intelligent machine, or a medical device supported on a freedom system. In addition, the present invention relates to a seismic reduction device that prevents destruction of a device to be protected by consuming the energy of the destructive energy of an earthquake through movement within a small moving distance.

  Conventionally, not only factories, buildings, and condominiums, but also mechanical equipment, cabinets, furniture, etc. installed inside them are exempt from damage caused by large external vibration inputs such as earthquakes. A seismic device is installed (Patent Document 1).

  Patent Document 1 can reduce the damage by reducing the vibration of the casing of the electronic device or the vending machine by the friction between the elastic rubber and the concave portion of the downward tray member, thereby preventing the damage. Related to seismic isolation support devices, with a downward receiving tray member fixed to the lower surface of a housing, product display shelf or housing, and a support base fixed to the floor or building foundation, and a tip attached to the support base In the seismic isolation device that movably contacts one or more members with the concave surface of the downward receiving tray member, it is attached to the support base via elastic rubber, it is supported via the swing structure, and a caster is attached. , By supporting the caster, and forming the stopper part by making the curvature of the peripheral edge of the concave part of the downward tray member smaller than the inside, the action of eliminating strong vibration reduction force and resonance phenomenon during repetitive action It is what happens.

JP2010-2047

  However, Patent Document 1 has a very special shape in which the downward receiving tray member carrying the load is supported by an elastic rubber material, and is dedicated to the load, and is a load supported by a caster. In addition, it was not possible to cope with various loads such as a load of a leveling bolt type or a load placed on a simple rubber non-slip mat.

  The subject of this invention is providing the seismic-reduction apparatus which can respond to the load which has a various kind of support leg, and the load which does not have a support leg by one type.

The vibration damping device (A) of the present invention according to claim 1 is:
A mounting plate (3) on which a load (M) is mounted;
On the upper surface (4a), the mounting plate (3) is mounted and slid, the supporting plate part (4), and provided on the upper surface (4a) of the supporting plate part (4), the mounting plate (3) A support base comprising a stopper wall (6) having a stopper groove (7) into which an end (3a) of the mounting plate (3) can be inserted on the side surface (6a) of the mounting plate ( 1) and
An elastic member (5) for floor installation laid on the lower surface (4b) of the support plate part (4);
It is characterized by comprising a soft member (8) disposed in the stopper wall (6).

The vibration damping device (A) of the present invention according to claim 2 is:
A mounting plate (3) on which a load (M) is mounted;
A mounting plate (3) is disposed immediately above the upper surface (4a), and a concave spherical surface recess (4c) is formed on the upper surface (4a), and the recess (4c) and the mounting plate (3 ) Is provided on the support plate part (4) on which the sphere (9) for slidably holding the mounting plate (3) is disposed, and on the upper surface (4a) of the support plate part (4), It consists of a stopper wall (6) in which a stopper groove (7) into which an end (3a) of the mounting plate (3) can be inserted is formed on the side surface (6a) of the mounting plate (3). Supported support base (1),
The sphere (9);
An elastic member (5) for floor installation laid on the lower surface (4b) of the support plate part (4);
It is characterized by comprising a soft member (8) disposed in the stopper wall (6).

  The third aspect relates to the structure of the concave portion (4c), and the concave portion (4c) is a concave spherical plate member (4d) constituting the upper surface (4g) portion of the support plate portion (4) and a plate member ( 4d) and a damping layer (4e) provided between the support plate portion (4).

  Claim 4 relates to the shape of the dish member (4d), and the lower surface (4h) of the dish member (4d) is formed in a convex spherical shape bulging downward, and the radius of the convex spherical surface is the concave spherical surface of the dish member (4d). It is larger than the radius of the upper surface (4g), and the two spherical centers (O) are coincident.

  The fifth aspect relates to another shape of the dish member (4d), and the lower surface (4h) of the dish member (4d) is formed in a convex spherical shape that bulges downward, and the radius of the convex spherical surface of the dish member (4d) is It is larger than the radius of the concave spherical upper surface (4g), and two spherical centers (O1) and (O2) are separated on the central axis (CL) of the spherical surface.

  In the vibration damping device (A) of the present invention, the mounting plate (3) slides on the upper surface (4a) of the support plate portion (4) of the support base (1) with the load (M) mounted. Any type of support leg (20a) can be accommodated by selecting an appropriate one for the loading plate (3) according to the load (M). And when an earthquake is input to a building where the load (M) supported by the seismic reduction device (A) is installed in this way, the input causes the mounting plate (3) carrying the load (M). The upper surface (4a) of the support plate portion (4) of the support base (1) moves relatively in the horizontal direction while generating friction to prevent the load (M) from overturning.

  When the amplitude of the earthquake is large and the end (3a) of the mounting plate (3) collides with the soft member (8), the impact at the time of the collision is buffered by the compression deformation of the soft member (8). The plate (3) stops.At this time, if the inertial force in the collision direction cannot be absorbed only by the deformation of the soft member (8), the elastic member (5) is deformed in the horizontal direction. In this way, the inertial force is absorbed, thereby preventing double damage caused by load (M) falling or vibration input.

  Further, a concave spherical concave portion (4c) is formed in the support plate portion (4), and a spherical body (9) is disposed thereon, and the mounting plate (3) is supported by the spherical body (9). In the case of the structure, when the support base (1) moves relative to the mounting plate (3) by the input of an earthquake as described above, the rolling base moves as it moves from the center of the recess (4c) to the peripheral portion. The mounting plate (3) competes through the spherical body (9) to increase the potential energy, and friction is generated between the concave spherical surface concave part (4c) and the spherical body (9) and converted into heat. Reduce the energy of earthquakes. Due to the convergence of the earthquake, the sphere (9) returns to the center of the recess (4c) and the load (M) returns to its original position.

  Further, the concave spherical plate member (4d) in which the concave portion (4c) forms the upper surface portion of the support plate portion (4), and an attenuation provided between the plate member (4d) and the support plate portion (4). When the sphere (9) supporting the load (M) via the mounting plate (3) rolls on the plate member (4d), the layer (4e) The damping layer (4e) is deformed by the movement, and even in this part, the energy of the earthquake is absorbed and reduced. At this time, the radius of the convex spherical lower surface (4h) of the dish member (4d) is larger than the concave spherical upper surface (4g), and the two spherical centers (O1) and (O2) are center axes of the spherical surfaces ( When they are separated on CL), not only the damping effect is significant, but also the sphere (9) tends to return to the center of the dish member (4d).

It is a top view of the load by which the four corners were supported by the present invention. 1 is a perspective view of a first embodiment of the present invention. FIG. 3 is a cross-sectional view of FIG. 2. It is sectional drawing of the modification of 1st Example of this invention. It is sectional drawing of the state holding the load which has an adjuster type support leg in the Example of FIG. It is a perspective view of 2nd Example of this invention. It is sectional drawing of FIG. It is sectional drawing of the modification of 2nd Example. It is sectional drawing of the other Example of the soft member used for this invention. It is sectional drawing of the further another Example of the soft member used for this invention.

  Hereinafter, the vibration damping device (A) of the present invention will be described in detail according to the illustrated embodiment. The first embodiment of the vibration damping device (A) according to the present invention comprises a mounting plate (3), a support base (1), an elastic member (5) and a soft member (8). In this embodiment, the structure of the upper surface (4g) portion of the support base (1) is different from that of the first embodiment, and a sphere (9) is further added thereto.

  The load (M) to which the present invention is applied is intended to avoid damages caused by earthquakes such as factory machinery and equipment, office machines, furniture, etc. The support method is as follows. There are those that are simply installed on the floor (2), caster type as shown in FIG. 4, adjuster type as shown in FIG. 5, and other various types not shown. Any device can be used as long as it can be attached to or placed on the device (A). Usually, the four corners of the bottom surface of the load (M) are supported by the vibration isolator (A) according to the present invention.

  2 to 3 show a first embodiment according to the present invention. The applied load (M) has no supporting leg and is simply installed on the floor surface (2). Therefore, the mounting plate (3) applied thereto is a square or rectangular plate, and is made of metal or hard resin. Usually, a thick rubber sheet (30) is laid between the load (M) and the mounting plate (3).

  The support base (1) includes a support plate portion (4) and a stopper wall portion (6). The support plate portion (4) is a rectangular or square plate-like member, and stopper wall portions (6) protrude from two sides of the upper surface (4a), and the mounting plate (3) of the stopper wall portion (6) A stopper groove (7) is formed over the entire length on the side surface (6a) on the mounting side. The lower end of the stopper groove (7) coincides with the upper surface (4a) of the support plate part (4) so that the end part (3a) of the mounting plate (3) can be smoothly inserted into the stopper groove (7). It has become.

  An elastic member (5) is laid over the entire lower surface (4b) of the support plate portion (4). As the elastic member (5), a viscoelastic body (low resilience rubber, urethane rubber, high damping elastomer or foam rubber is more preferable) is used to increase the static friction force or dynamic friction force on the bottom surface. Many grooves (5a) and patterns are formed vertically and horizontally.

  Similarly to the elastic member (5), the soft member (8) is made of a viscoelastic body (a material having a high thermal energy conversion efficiency such as a low-rebound rubber, a urethane rubber, a high-damping elastomer or a foaming rubber is preferable). . The soft member (8) is arranged over the entire length of the stopper groove (7) or at a necessary place, and the side surface (6a) of the stopper wall portion (6) constituting the stopper groove (7) is formed of the soft member (8 ) Projecting outward (that is, this portion is a groove into which the end (3a) of the mounting plate (3) is inserted). The cross-sectional shape of the soft member (8) is rectangular or square as shown in the drawing, or the tip is triangular (ie, wedge-shaped) as shown in FIGS. 9 and 10, and the opening side of the stopper groove (7). Various things such as a concave in the cross-sectional direction in which the groove (8a) is formed in the groove are conceivable.

  Such an anti-seismic device (A) is arranged, for example, at four corners of a load (M) as shown in FIG. 1, and is set on a mounting plate (3) via, for example, a rubber sheet (30). A gap (K) is provided between the end (3a) of the mounting plate (3) and the soft member (8), and the end (3a) of the plate (3) is a stopper wall (6). It slightly enters the stopper groove (7) beyond the side surface (6a).

  When an earthquake occurs, a weak longitudinal wave is input to the building, followed by a strong horizontal transverse wave. Although the horizontal shear wave has a wide variety of waveforms, the load (M) is set integrally on the mounting plate (3) via, for example, a rubber sheet (30). When the static friction force between the mounting plate (3) and the support plate portion (4) is exceeded, the mounting plate (3) slides on the support plate portion (4) while generating friction according to the waveform of the transverse wave. . During this time, all or part of the vibration energy of the earthquake is converted into heat and absorbed by the friction between the mounting plate (3) and the support plate (4). When the amplitude of the earthquake increases, the amount of relative movement between the mounting plate (3) and the support plate (4) increases, and the end (3a) of the mounting plate (3) collides with the soft member (8). .

  The soft member (8) is compressed by this collision. At this time, the soft member (8) performs the same function as the damper, converts all or part of the vibration energy into heat and absorbs it. When the soft member (8) absorbs all or almost all the vibration energy, the deformation of the elastic member (5) is zero or small. When the soft member (8) is greatly dented and hardened by the collision and cannot absorb all of the vibration energy, the entire support base (1) is pushed out by the mounting plate (3), and the elastic member ( 5) bends greatly. A large number of grooves (5a) are formed on the bottom surface of the elastic member (5) to increase the static friction force with the floor surface (2), so that the elastic member (5) is usually placed on the floor surface (2). Never slip. After that, the mounting plate (3) moves in the opposite direction due to the reversal of the seismic waveform, and the same thing happens with the seismic reduction device (A) on the opposite side.

  In addition, when the cross-sectional shape of the soft member (8) is a triangle or a laterally concave as described above, the volume of the portion to be compressed increases as the soft member (8) is pushed in, and the mounting plate ( The resistance against the pushing in 3) increases gradually, and the attenuation increases gradually.

  4 and 5 show another embodiment of the mounting plate (3). A ring-shaped protrusion (3d) is formed on the upper surface (3b) of the mounting plate (3), and the hole bottom is flat when viewed from above. In this example, a concave hole (3c) is provided, and support legs (20a) such as casters and leveling bolts are accommodated in the concave hole (3c). An end portion (3a) protrudes outside the ridge (3d).

  FIGS. 6 and 7 show a second embodiment of the vibration damping device (A) of the present invention. The upper surface (4a) of the support plate (4) is provided with a concave spherical plate member (4d) having a circular shape in plan view. The surface of the dish member (4d) is a recess (4c). The dish member (4d) is made of hard metal or resin, and its edge reaches the upper surface (4a) of the support plate part (4). In addition, the two-dot chain line of FIG. 6 shows the case of FIG. The plate member (4d) is provided with a ball (9) made of steel balls so as to roll freely, and a mounting plate (3) is mounted thereon. The diameter of the sphere (9) is slightly larger than the depth of the dish member (4d), and a slight gap (T1) is provided between the mounting plate (3) and the upper surface of the support plate portion (4).

  In this case, the gap (T2) between the upper surface of the end portion (3a) of the mounting plate (3) and the lower surface of the stopper groove (7) is such that the end portion (3a) of the mounting plate (3) is a soft member. The upper surface of the end portion (3a) is formed so as not to come into contact with the lower surface of the stopper groove (7) when it moves in the direction (8) and collides with it.

  Thus, when an earthquake is input as described above, relative movement of the support plate part (4) with respect to the mounting plate (3) via the sphere (9) occurs in accordance with various horizontal shear wave waveforms. When the sphere (9) moves from the center of the plate member (4d) to the periphery, the mounting plate (3) is lifted together with the load (M), and the potential energy increases, and the amplitude of the earthquake is correspondingly increased. It is suppressed. When the amplitude of the earthquake is large, the end portion (3a) of the mounting plate (3) collides with the soft member (8), the vibration energy is absorbed by the damper effect, and the elastic member (5) is further deformed.

  After that, as described above, the vibration direction is reversed, and the support plate portion (4) moves in the opposite direction with respect to the mounting plate (3), and the same thing occurs in the vibration-reducing device (A) on the opposite side. Such reciprocating motion is repeated until the earthquake converges, and as the earthquake converges, the sphere (9) returns to the center of the plate member (4d) and at the same time the load (M) placed on the sphere (9) also Return to the original position. The cross-sectional shape and behavior of the soft member (8) are the same as those in the first embodiment, and the same applies to the case where the elastic member (5) is bent due to a large collision, and the floor surface (2). It is also the same that the elastic member (5) does not normally slide on the floor surface (2).

  FIG. 8 shows a modified example of the second embodiment, in which an attenuation member serving as an attenuation layer (4e) is provided under the dish member (4d). Hereinafter, the same attenuation member as that of the attenuation layer (4e) is used. As the material of the damping member (4e), a soft material such as rubber or a high damping elastomer, a viscous member, or a viscoelastic member is used. The damping member (4e) has a storage recess (4f) formed on the upper surface thereof, and the dish member (4d) is fitted in the storage recess (4f). The radius of the convex spherical surface of the dish member (4d) is larger than the radius of the concave spherical upper surface (4g) of the dish member (4d) as shown in FIG. As shown in FIG. 8, the radius of the convex spherical surface is larger than the radius of the concave spherical upper surface (4g) of the plate member (4d), and the two spherical centers (O1) (O2 ) May be separated on the central axis (CL) of the spherical surface, the center may be thin, and the thickness may be gradually increased toward the periphery. That is, the upper surface (4g) has a concave spherical shape, and the lower surface (4h) has a convex spherical shape having a larger radius than the upper surface (4g).

  In this case, the upper surface of the storage recess (4f) of the damping member (4e) is formed so as to match the convex spherical surface of the lower surface of the dish member (4d). Of course, although not shown, the lower surface of the plate member (4d) may be flat, and the upper surface of the storage recess (4f) of the damping member (4e) may be formed flat so as to match this.

  Thus, when an earthquake is input as described above, the support plate portion (4) moves relative to the mounting plate (3) via the sphere (9) as in the case of FIG. At this time, as the sphere (9) moves, the damping member (4e) immediately below it bends and at the same time, the plate member (4d) is slightly pushed and bent around that portion, and the center of the plate member (4d) is bent. A seesaw state appears in which the opposite side of the portion slightly floats around the center. Due to this bending, a part of the seismic energy is absorbed by the damping member (4e).

  In this case, when the upper surface (4g) and the lower surface (4h) of the dish member (4d) show concentric circles in the cross section, the mounting plate (4 3) is lifted, and a part of the seismic energy is absorbed by the damping member (4e).

  On the other hand, when the upper surface (4g) of the dish member (4d) has a concave spherical shape and the lower surface (4h) has a convex spherical shape with a larger radius than the upper surface (4g), the upper surface (4d) of the dish member (4d) As the sphere (9) rolls, a pendulum-like movement in which the plate member (4d) and the sphere (9) are coupled to each other occurs, and this does not depend on the load mass and the concave spherical upper surface (4g) The restoring force of the load (M) is determined by the radius, the radius of the convex spherical lower surface (4h) and the radius of the sphere (9), and at the same time, the movement of the dish member (4d) on the damping member (4e) A damping force can be generated.

  And if the amplitude of the earthquake is large, as described above, the end (3a) of the mounting plate (3) collides with the soft member (8), and further the elastic pad (5) is deformed. The same thing happens with the anti-seismic device (A) on the opposite side. Such reciprocating motion is repeated until the earthquake converges, and as the earthquake converges, the sphere (9) returns to the center of the plate member (4d) and at the same time the load (M) placed on the sphere (9) also Return to the original position. As shown in FIG. 8, as the sphere (9) moves toward the peripheral edge, the amount of tilting of the dish member (4d) increases, and the dish member (4d) swings larger, and the sphere (9) becomes the dish member. It becomes easy to return to the center of (4d).

(A) ... Attenuator
(M) ・ ・ ・ Load
(1) ... Support base
(3) ... Plate plate
(3a) ・ ・ ・ End
(4) ... Support plate
(4a) ... Upper surface
(4b) ・ ・ ・ Lower surface
(4c) ... Recess
(4d) ... Dish material
(4e) ・ ・ ・ Attenuation layer
(5) ... Elastic member
(6) ・ ・ ・ Stopper wall
(6a) ・ ・ ・ Side side
(7) ・ ・ ・ Stopper groove
(8) ・ ・ ・ Soft material
(9) ・ ・ ・ Sphere

Claims (5)

A mounting plate on which the load is mounted;
A support plate portion on which the mounting plate is mounted and slides on the upper surface, and a stopper provided on the upper surface of the support plate portion, into which the end portion of the mounting plate can be inserted on the side surface on the mounting side of the mounting plate A support base composed of a stopper wall formed with grooves,
An elastic member for floor installation laid on the lower surface of the support plate part;
An anti-seismic device comprising a soft member disposed in the stopper wall. A mounting plate on which the load is mounted;
A mounting plate is disposed immediately above the upper surface, and a concave spherical concave portion is formed on the upper surface, and a sphere that slidably holds the mounting plate is disposed between the concave portion and the mounting plate. And a stopper wall portion provided on the upper surface of the support plate portion and provided with a stopper groove on the side surface of the placement plate on which the end portion of the placement plate can be inserted. A supporting base,
The sphere;
An elastic member for floor installation laid on the lower surface of the support plate part;
An anti-seismic device comprising a soft member disposed in the stopper wall.   3. The concave portion is constituted by a concave spherical dish member constituting an upper surface portion of the support plate portion, and an attenuation layer provided between the dish member and the support plate portion. Seismic reduction device.   The bottom surface of the dish member is formed in a convex spherical shape that bulges downward, the radius of the convex spherical surface is larger than the radius of the concave spherical upper surface of the dish member, and the two spherical centers coincide with each other. The vibration-reducing device according to claim 3.   The lower surface of the dish member is formed in a convex spherical shape that bulges downward, the radius of the convex spherical surface is larger than the radius of the concave spherical upper surface of the dish member, and the two spherical centers are separated on the central axis of the spherical surface The vibration-reducing device according to claim 3, wherein

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