JP6310336B2 - Vibration reduction mount - Google Patents

Description

  Since the present invention does not require countermeasures against solid sounds, it does not seem to require countermeasures for equipment installed in the ground in a stable state without using conventional vibration isolation devices (for example, water tanks and boilers), or measures against solid sounds. The seismic mount for equipment installed in various environments.

  Equipment installed inside and outside the building, for example, does not have equipment such as an air conditioner having an operating part such as a motor, fan, or piston inside, or an operating part such as a water tank, and is installed in a stationary state. There are various types of equipment such as equipment and equipment installed separately from the living environment such as a boiler. In equipment that has moving parts such as motors and pistons inside, it is necessary to prevent noise during operation from being transmitted to the floor surface in order to protect the surrounding comfortable living environment. An anti-vibration device is installed between them (see Patent Document 1).

  On the other hand, equipment such as a water tank does not generate noise itself, and equipment such as a boiler is installed away from the living environment, so it is installed directly on the floor without using anti-vibration equipment. Is done. When an earthquake strikes such an equipment, its destructive force is applied directly to such equipment, and the equipment is immediately destroyed if it exceeds the seismic performance of the equipment. In particular, such equipment is large and very important for maintaining the surrounding buildings and living environment, and the damage of the equipment is not limited to the damage of the equipment but has a great influence on the surrounding environment.

JP 2009-85416 A

  Therefore, the object of the present invention is to provide a vibration-reducing mount using slip, which is specialized for enhancing the earthquake resistance for such equipment which has not been used in the past. is there.

Claim 1 is an anti-seismic mount 1 using slipping,
A casing 2 installed on the installation surface 10 and having a storage space 3 therein;
An elastic vibration-damping member 4 accommodated in the storage space 3;
Attached to the elastic vibration-reducing member 4, protrudes from the casing 2, and is attached to the equipment 5 mounted on the casing 2. The elastic vibration-reducing member 4 is slidably pressed against the casing 2 when vibration is input. It is comprised by the mounting member 6, and the convex part 4c pressed by the casing 2 is protrudingly provided by the upper surface 4b of the elastic vibration-damping member 4. It is characterized by the above-mentioned.

Thus, when a large vibration input such as an earthquake is hit, the installation surface 10 reciprocates greatly in the horizontal direction. On the other hand, in the initial motion of the earthquake, the heavy equipment device 5 stays in place due to its inertia, so that the elastic vibration-reducing member 4 integrated with the equipment device 5 via the mounting member 6 While being pressed by the pressing force, it slides back and forth and generates a frictional force at the sliding contact portion. As a result, a part of the seismic energy is absorbed by the elastic vibration reducing member 4 by being changed into heat. When the amplitude is large, the outer side surface 4a of the elastic vibration-reducing member 4 is deformed by being pressed against the inner side surface of the casing 2, and this deformation further attenuates the pressure applied by the earthquake. At this time, only the convex portion 4c is deformed at the time of mounting, and the relative slip of the elastic vibration reducing member 4 with respect to the casing 2 at the time of earthquake input is facilitated to some extent.

    According to a second aspect of the present invention, in the vibration damping mount 1 according to the first aspect, the planar shape of the storage space 3 and the elastic vibration-damping member 4 is circular, and the outer side surface 4 a of the elastic vibration-damping member 4 is formed on the inner surface of the casing 2. It is housed so as to be in contact with each other.

  As a result, the elastic vibration reducing member 4 is pressed against the inner peripheral surface of the casing 2 at the same time as receiving the shaking of the earthquake, and immediately deforms, thereby attenuating a part of the seismic energy instantaneously and greatly affecting the equipment 5. To reduce.

According to a third aspect of the present invention, in the vibration damping mount 1 according to the first or second aspect, the outer surface 4a of the elastic vibration reducing member 4 gradually decreases in diameter from the upper surface 4b of the elastic vibration reducing member 4 toward the bottom surface 4d. It is characterized by being formed.

A fourth aspect is another example of the third aspect of the vibration-reducing mount 1 according to the first or second aspect, wherein protrusions 4f are radially provided on the outer surface 4a of the elastic vibration-reducing member 4. And

  By doing in this way, the deformation amount of the elastic vibration-reducing member 4 is deformed in proportion to the amplitude of the earthquake, so that it is possible to appropriately cope from a small earthquake to a large earthquake.

  Since the present invention is configured as described above, the casing 2 reciprocates relative to the elastic vibration-reducing member 4 when receiving seismic energy (excitation force). At the same time, the elastic vibration-reducing member 4 slides with a predetermined pressing force, and a part of the excitation force is changed to heat to attenuate the inputted earthquake. When a larger earthquake is input, the outer surface 4a of the elastic vibration-damping member 4 is pressed against the inner surface of the casing 2 to deform as described above, and a part of the earthquake energy is applied to the larger earthquake. Effectively attenuate. Thereby, the earthquake resistance of the equipment 5 which does not require a vibration isolator can be improved significantly.

It is a front view of the equipment provided with the vibration-reducing mount according to the present invention. FIG. 2 is an enlarged partial cross-sectional view of a portion X in FIG. 1. It is a top view of the vibration reduction mount which concerns on this invention. FIG. 4 is a front view of FIG. 3. FIG. 4 is a cross-sectional view taken along a line YY in FIG. 3. It is sectional drawing which shows the deformation | transformation state by the earthquake of the elastic vibration damping member in FIG. It is a disassembled perspective view of the principal part containing the elastic vibration damping member of this invention. It is sectional drawing of the other example of the vibration-reduction mount which concerns on this invention. It is a top view of the other example of the elastic vibration damping member used for this invention. FIG. 10 is a longitudinal sectional view of FIG. 9.

  The present invention will be described below with reference to the drawings. The vibration reduction mount 1 includes a casing 2 having a storage space 3 therein, an elastic vibration reduction member 4 and a mounting member 6 that are stored in the storage space 3.

  The casing 2 includes a casing main body 2a having an open lower surface and a flange portion 2b integrally attached to the lower surface opening by welding or integrally provided by a diaphragm. The casing main body 2a is a plane circle, and a round hole 2e is formed in the center of the ceiling portion constituting the placement portion 2a1.

  The flange portion 2b has a through hole formed in the center in accordance with the opening of the lower surface of the casing body 2a, and mounting holes 2g are formed in portions extending left and right from the through hole. Of course, the shape of the flange portion 2b is not limited to this, and a mounting hole may be formed at the four corners of a quadrangle. When the installation position of the anti-seismic mount 1 is fixed, although not shown, a plurality of through holes are drilled at predetermined intervals in the long flange portion, and the lower surface opening of the casing body 2a is made to coincide with each of them. You may make it weld.

  The elastic vibration-reducing member 4 is an elastomer which is a general term for industrial materials having rubber elasticity, and more specifically, a vulcanized rubber elastomer (for example, natural rubber) obtained by kneading a raw material with a vulcanizing agent and then heating. , Synthetic rubber, low resilience rubber, etc.), thermosetting elastomers (for example, silicone rubber, fluorine rubber, etc.), softening and fluidity when heated, and rubber-like elastic body when cooled Thermoplastic elastomers having the property of returning to (for example, styrene-based, olefin-based, vinyl chloride-based, urethane-based and amide-based) are used as materials.

  In the case of the first embodiment shown in FIGS. 5 and 7, the shape of the elastic vibration-reducing member 4 is a circular planar shape of the elastic vibration-reducing member 4 and its outer surface 4a extends straight downward from the upper surface 4b This straight portion is referred to as a straight portion 4a1), and the diameter is gradually reduced from the straight portion 4a1 toward the bottom surface 4d. This portion is referred to as a tapered portion 4a2. Of course, although not shown, the entire outer surface 4a from the upper surface 4b to the bottom surface 4d may be used as the tapered portion 4a2 without the straight portion 4a1.

  And the convex part 4c of the longitudinal cross-sectional semicircle shape is integrally protrudingly provided by the ring shape in the outer periphery whole periphery of the upper surface 4b of the elastic vibration damping member 4. As shown in FIG. A fitting hole 4e extending from the upper surface 4b to the bottom surface 4d is formed in the center. The diameter of the elastic vibration-reducing member 4 is substantially equal to the inner diameter of the storage space 3 of the casing 2, and the straight portion 4 a 1 is in contact with the inner peripheral surface of the storage space 3. (However, in order to take a large slip as described later, the diameter of the elastic vibration-reducing member 4 may be slightly smaller than the inner diameter of the storage space 3 of the casing 2 so that the convex portion 4c slides slightly when an earthquake is input.)

  The mounting member 6 may be anything as long as it can fix the elastic vibration damping member 4 to a predetermined location of the equipment 5, but in this embodiment, a bolt 6 a, a nut 6 b and a washer 6 c are used. The bolt 6a is a stepped bolt, and protrudes from the insertion shaft portion 6a2 to be inserted into the insertion hole 4e of the elastic vibration-damping member 4, the upper end surface of the insertion shaft portion 6a2, and has a male screw whose diameter is smaller than the insertion shaft portion 6a2. It is provided on the lower end surface of the rod portion 6a3 and the insertion shaft portion 6a2, and is composed of an outer casing 6a1 having a diameter larger than that of the insertion shaft portion 6a2. The diameter of the insertion shaft portion 6a2 is substantially equal to the inner diameter of the insertion hole 4e and is inserted with a press fit. The height H1 of the fitting shaft portion 6a2 is formed slightly shorter than the sum of the total height H2 of the elastic vibration-damping member 4 and the thickness t of the mounting portion 2a1 of the casing body 2a.

  Further, as shown in FIG. 5, the upper end portion of the fitting shaft portion 6a2 is located in a round hole 2e drilled in the casing body 2a and causes slipping as described later at this position. It is made considerably larger than the diameter of the insertion shaft portion 6a2. Although not shown, the outer casing 6a1 may be configured as a separate body and integrated with the fitting shaft portion 6a2 by welding or screwing.

  Accordingly, as shown in FIGS. 3 to 5, the fitting shaft portion 6 a 2 of the bolt 6 a is fitted into the fitting hole 4 e of the elastic vibration reducing member 4, and the outer flange 6 a 1 is brought into contact with the bottom surface 4 d of the elastic vibration reducing member 4. Thereafter, the elastic vibration-reducing member 4 is inserted into the storage space 3 of the casing body 2a, and the male screw rod portion 6a3 is projected from the round hole 2e. When the elastic vibration-reducing member 4 is inserted in substantially the same or slightly press-fitted state as the inner diameter of the storage space 3, it remains in the storage space 3 in this state.

  Next, as shown in FIG. 2, for example, the vibration-reducing mount 1 is set on the installation surface 10 of the foundation 11 via an elastic sheet 14 such as a rubber sheet, and the anchor 12 protruding from the foundation 11 is attached to the flange portion 2b. And is temporarily fixed by tightening the nut. When the anti-seismic mounts 1 are set on all the anchors 12, the equipment 5 is suspended from above, the male threaded rod portion 6a3 is inserted into the bolt hole 13 provided in the equipment 5, and the nut is tightened and temporarily fixed. In the case where the position of the equipment 5 is determined, in this case, the equipment is fixed with a double nut hook, and the equipment 5 is fixed. Since the bolt 6a is stepped and has a dimension H1 as described above, when the male screw rod portion 6a3 is nut-fastened to the bolt hole 13 of the equipment 5, the upper end surface of the fitting shaft portion 6a2 is the bolt hole 13. It is pressed against the lower surface to regulate the tightening amount of the nut 6b and prevent overtightening. In other words, the tightening allowance does not exceed the height of the convex portion 4c. As a result, the convex portion 4c of the elastic vibration-reducing member 4 is attached in a state where it is lightly pressed against the lower surface of the mounting portion 2a1 of the casing body 2a.

  When an earthquake strikes in this state, the installation surface 10 reciprocates greatly in the horizontal direction as described above. On the other hand, since the equipment 5 which is a heavy object remains in place due to inertia in the initial motion of the earthquake, a relative horizontal reciprocation occurs between the installation surface 10 and the equipment 5 and the equipment is installed as shown in FIG. The installation surface 10 moves to the left side in the figure with respect to the elastic vibration-damping member 4 integrated with the device 5. During this movement, the convex portion 4c of the elastic vibration-reducing member 4 is lightly pressed against the mounting portion 2a1 of the casing body 2a, so that the convex portion 4c slides slightly while being pressed. Seismic energy is converted into heat and attenuated by friction during this period.

  As described above, when the outer surface 4a of the elastic vibration reducing member 4 is in contact with the inner surface of the casing main body 2a, the inner surface of the casing main body 2a contacts the outer surface 4a of the elastic vibration reducing member 4 simultaneously with this sliding. Will contact and press. Thereby, the pressing part of the elastic vibration-reducing member 4 is greatly bent, and the seismic energy is converted into heat and attenuated. In this case, since the elastic vibration-reducing member 4 presses the inner surface of the casing body 2a at the same time as the sliding, the elastic vibration-damping member 4 does not impactly press the inner surface of the casing body 2a. Since the earthquake swings left and right, the left and right pressing portions of the elastic vibration-reducing member 4 are alternately bent in accordance with the vibration, and the earthquake energy is rapidly attenuated.

  Since the outer side surface 4a of the elastic vibration reducing member 4 is tapered toward the bottom surface 4d, the contact area of the outer side surface 4a increases in proportion to the increase in the amplitude of the earthquake.

  FIGS. 9 and 10 show a second embodiment of the elastic vibration-reducing member 4, and eight protruding strips 4 f are radially provided on the outer surface 4 a of the elastic vibration-reducing member 4 in place of the taper of the outer surface 4 a. . In the embodiment shown in the figure, a protrusion 4f is formed over the entire height of the cylindrical member body 4h. The ridge 4f is formed so that the base is slightly wider than the tip. Further, the convex portion 4c formed on the upper surface 4b of the elastic vibration damping member 4 in this case is different from the first embodiment (of course, it may be the same), but is not a ring shape but a frustoconical protrusion, and the insertion hole 4e Eight points are projected at equal angles on the outer concentric circles. These functions are the same as in the first embodiment.

  FIG. 8 shows a case where the side wall 2a2 of the casing body 2a is open toward the lower surface opening. In this case, when the elastic vibration reducing member 4 is pressed and deformed by the side wall 2a2, the elastic vibration reducing member 4 receives a reaction force obliquely downward from the side wall 2a2, and slightly pushes down the elastic vibration reducing member 4 downward. Thereby, the effect that the fall of the equipment 5 is suppressed is added.

1: anti-seismic mount, 2: casing, 2a: casing body, 2a1: placement portion,
2a2: side wall, 2b: flange portion, 2e: round hole, 2g: mounting hole, 3: storage space, 4: elastic vibration damping member, 4a: outer surface, 4a1: straight portion, 4a2: taper portion, 4b: upper surface, 4c: convex part, 4d: bottom face, 4e: insertion hole, 4f: convex line, 4h: member main body, 5: equipment, 6: mounting member, 6a: bolt, 6a1: outer rod, 6a2: insertion shaft part, 6a3 : Male threaded rod part, 6b: nut, 6c: washer, 10: installation surface, 11: foundation, 12: anchor, 13: bolt hole, 14: elastic sheet, t: wall thickness.

Claims (4)

A casing installed on the installation surface and having a storage space inside;
An elastic vibration damping member housed in the housing space;
The elastic damping member is attached to the elastic vibration reducing member, protrudes from the casing, and is attached to the equipment mounted on the casing. And
An anti-seismic mount , wherein a convex portion that is pressed against the casing projects from the upper surface of the elastic anti-seismic member . In GenShin mount according to claim 1, wherein the planar shape of the housing space and the elastic GenShin member is circular, and, housed such that the outer surface of the elastic GenShin member on the inner surface of the casing contacts An anti-vibration mount characterized by The vibration reduction mount according to claim 1 or 2, wherein an outer side surface of the elastic vibration reduction member is formed so as to gradually reduce its diameter from the upper surface to the bottom surface of the elastic vibration reduction member. Attenuate mount. 3. The anti-seismic mount according to claim 1, wherein ridges project radially from the outer surface of the elastic anti-seismic member .

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