JP2006249870A - Beam device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a beam device capable of being installed later on a current floor, saving a space, and preventing increase of floor height and incorporating a shock vibration absorbing mechanism. <P>SOLUTION: This beam device for supporting the floor by providing a main body part on a lower face of the floor is constituted by arranging a movement mass body performing linear movement along the direction of shock in accordance with shock transmitted from the floor, an elastic member for supporting the movement mass body elastically, and a rotary damper operating to increase resistance force in accordance with rotation in the main body part and has a structure for connecting the rotary damper with the movement mass body by a movement conversion means for converting linear movement of the movement mass body into rotary movement. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a beam device that absorbs impact vibration applied to a floor.

  The floors of apartments and condominiums may vibrate due to the children's jumping and the like, causing the floor to vibrate, causing the shock to propagate downstairs and the surrounding area. In order to reduce such vibrations, conventionally, a method has been adopted in which a vibration-proof rubber pad is applied to the foot of the joist supporting the floor to increase the weight of the floor and the like. However, a sufficient damping effect has not been obtained.

  If the structure that supports the floor with a soft spring is adopted, the floor itself will be greatly shaken by the impact. Conversely, when the spring is stiff, the vibration is reduced, but the transmission of vibration to the installation location is increased.

  Impact dampers that consume energy by causing the floor to collide with the mass body may be used, but the behavior of the impact damper depends greatly on the gap of the container, mass ratio, coefficient of restitution, frequency ratio, magnitude of external force, etc. Therefore, the damping effect cannot be obtained unless a strict design is made.

  Therefore, the present inventor has already proposed a vibration damping device that can effectively suppress the vibration of the vibration damping object when a shocking disturbance is applied to the vibration damping object such as a floor or a machine. This is because the damping mass is placed in contact with the damping object, and when the momentum is transmitted from the damping object, the damping mass moves separately from the damping object, and this exercise consumes the momentum. This is a vibration damping device having a restoring mechanism that returns the vibration damping mass to its original position before the next impact is applied. The restoring mechanism includes a spring and a dashpot, and is configured such that the damping is small when the damping mass is separated from the floor, and the damping is increased as the distance from the floor is increased. (See Patent Document 1)

However, it is difficult to install such a vibration damping device directly on the floor of an apartment or a condominium, and it cannot be easily installed.
JP-A-10-110774

  The present invention was created in view of the above-mentioned demands, and the object of the present invention is to be installed on the current floor later, and to save space and not to increase the floor height. The object is to provide a beam device incorporating a mechanism.

  A beam apparatus according to the present invention is a beam apparatus that supports a floor by laying a main body on the lower surface of the floor, and is a moving mass that linearly moves along the direction of the impact accompanying the impact transmitted from the floor. A body, an elastic member that elastically supports the moving mass body, and a rotary damper that operates so as to increase a resistance force as it rotates, are disposed in the main body, and performs linear motion of the moving mass body. The rotary damper and the moving mass body are connected to each other by a motion conversion means for converting into a rotational motion.

  Preferably, a base plate that supports the rotary damper and the bottom of the elastic member is provided, and the base plate is fixed to the bottom of the main body via an elastic mat.

  It is preferable that a shaft for guiding a linear motion of the moving mass body is erected on the base plate so as to penetrate the moving mass body.

  It is preferable that a bearing extending in a linear motion direction of the moving mass body is provided between the moving mass body and the shaft.

  According to the first aspect of the present invention, since the impact energy applied to the floor is absorbed by the sliding motion of the moving mass body, the floor is not vibrated accordingly. Further, the moving mass body is braked by the rotary damper, and then flexibly returned to the original position by the restoring force of the elastic member. Since the shock vibration absorption mechanism including the moving mass body and the rotating damper is incorporated in the main body of the beam, the floor height does not increase and the space can be saved. It is also easy to install on an existing floor.

  According to the second aspect, since the elastic mat is provided between the base plate supporting the rotary damper and the bottom of the elastic member and the main body, it is possible to block the high frequency component of vibration and not transmit it to the main body.

  According to the third aspect, since the shaft for guiding the linear motion of the moving mass body is erected on the base plate so as to penetrate the moving mass body, the moving mass body has no left and right shakes, and the linear motion is converted into the rotational motion. The motion conversion means to convert can operate correctly without loss.

  According to claim 4, since the bearing extending in the linear motion direction of the kinetic mass body is provided between the kinetic mass body and the shaft, the linear motion of the kinetic mass body in the up and down direction is smoothed to the floor. The impact force can be efficiently absorbed as the kinetic energy of the moving mass.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a front view showing an installed state of a beam apparatus according to the present invention. FIG. 2 is a side view showing an installed state of the beam apparatus according to the present invention. As shown in FIGS. 1 and 2, the beam device 100 includes an impact vibration absorbing mechanism 200 incorporated in the main body 1 of the beam. In addition, although the shape of the beam device 100 is a U-shape, it is not limited to this, and may be an E-shape or a B-shape with a partial opening. The beam apparatus 100 is installed between the vibration isolating mount 5 and the floor 7 installed on the slab 6 which is a concrete foundation, for example. The anti-vibration mount 5 may be of a type such as an air spring, but here, as shown in the drawing circle C1, a cylindrical one with a highly viscous resin filled therein was used. This is because viscous resin travels between resin tank chambers through a throttle valve called an orifice to absorb vibration.

  As shown in FIG. 1, the impact vibration absorbing mechanism 200 includes a moving mass body 2 provided in contact with the inner upper portion of the main body 1 of the beam, and a coil spring 3 that is an elastic member that supports the bottom of the moving mass body 2. Similarly, it is configured to include a rotary damper 4 provided at the bottom of the moving mass body 2. When an impact is applied to the floor 7, the impact energy is transmitted to the kinetic mass 2 through the pusher 8 using urethane, which is a low-repulsion material, and the kinetic mass 2 moves downward along the direction of the impact in this case. Move toward. The coil spring 3 is assumed to be soft.

  FIG. 3 is a front view showing a detailed structure of the beam apparatus according to the present invention. The beam device 100 has an impact vibration absorbing mechanism 200 incorporated therein. The main body 1 of the beam made of steel is U-shaped and opened to the front. In the impact vibration absorbing mechanism 200, the pusher 8 comes into contact with the inner upper part of the main body 1 of the beam from above by the force of the left and right coil springs 3, and the impact force is transmitted to the moving mass body 2. A base plate 10 is provided at the bottom of the shock vibration absorbing mechanism 200 and is bolted 16 to the bottom of the main body 1 of the beam via a rubber elastic mat 11. The elastic mat 11 can block high-frequency vibrations. The moving mass body 2 is supported by the two shafts 12 so as not to move left and right but to move up and down. Since the linear bush 9 is attached to the shaft 12, the moving mass body 2 can perform a smooth linear motion in the vertical direction. A rotary damper 4 is fixedly installed on the base plate 10 at the front center.

  FIG. 4 is a plan view (a) and a side view (b) showing the detailed structure of the beam apparatus according to the present invention. The top view member of the main part 1 of a beam is abbreviate | omitted and the top view of the impact vibration absorption mechanism 200 is shown. A linear bush 9 is mounted on the shaft 12, and a linear motion bearing is incorporated in the linear bush 9. The linear motion bearing is arranged so that the ball bearing smoothly performs linear motion. A rack gear 15 is provided on the front surface of the moving mass 2, and a spur gear 14 that is screwed to the rack gear 15 is provided on the shaft of the rotary damper 4. The rack gear 15 and the spur gear 14 act as motion conversion means for converting the linear motion of the moving mass body 2 into rotational motion. When the moving mass body 2 moves downward due to the impact force on the floor, the rack gear 15 also moves downward, and accordingly, the spur gear 14 is rotated.

  As shown in FIG. 4 (b), the main body 1 of the beam of the beam device 100 is U-shaped. The shock vibration absorbing mechanism 200 is incorporated inside the main body 1 of the beam. When the moving mass body 2 pushes and contracts the coil spring 3 and moves downward by the impact force to the floor, the rack gear 15 attached to the moving mass body 2 also moves downward, and the spur gear 14 screwed to the rack gear 15 rotates. . The spur gear 14 is attached to the shaft of the rotary damper 4 and rotates to the right, but the resistance force is small at the beginning of rotation, and the resistance force gradually increases. When the moving mass body 2 stops moving downward, the moving mass body 2 is moved upward by the restoring force of the coil spring 3. The pusher 8 is flexibly brought into contact with the inner upper portion of the main body 1 of the beam.

  FIG. 5 is a perspective view of the linear bush. The linear bush 9 has 2 to 4 linear motion bearings 17 on the outside thereof. Since the linear bush 9 is mounted on the shaft 12 and is inserted into the through hole of the kinetic mass body 2, the vertical motion of the kinetic mass body 2 can be smoothly performed. The linear bush 9 may be mounted in the through hole of the moving mass body 2, the linear motion bearing 17 may be provided inside the linear bush 9, and the shaft 12 may be inserted therein.

  The present invention is a beam device that absorbs impact vibration applied to a floor, and is suitable as a building member.

It is a front view which shows the installation state of the beam apparatus by this invention. It is a side view which shows the installation state of the beam apparatus by this invention. It is a front view which shows the detailed structure of the beam apparatus by this invention. It is the top view (a) and side view (b) which show the detailed structure of the beam apparatus by this invention. It is a perspective view of a linear bush.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main part of beam 2 Moving mass 3 Coil spring 4 Rotation damper 5 Anti-vibration mount 6 Slab 7 Floor 8 Pusher 9 Linear bush 10 Base plate 11 Elastic mat 12 Shaft 14 Spur gear 15 Rack gear 16 Bolt tightening 17 Linear motion bearing 100 Beam device 200 Shock vibration absorption mechanism

Claims (4)

A beam device that supports the floor by laying the main body on the lower surface of the floor,
A moving mass body that linearly moves along the direction of the shock accompanying the impact transmitted from the floor, an elastic member that elastically supports the moving mass body, and a resistance force that increases as it rotates. A rotating damper is arranged in the main body, and the rotating damper and the moving mass body are connected by a motion converting means for converting a linear motion of the moving mass body into a rotating motion. apparatus.   The beam apparatus according to claim 1, wherein a base plate that supports the rotary damper and a bottom portion of the elastic member is provided, and the base plate is fixed to a bottom portion of the main body portion via an elastic mat.   The beam apparatus according to claim 2, wherein a shaft for guiding a linear motion of the moving mass body is erected on the base plate so as to penetrate the moving mass body.   The beam apparatus according to claim 3, wherein a bearing extending in a linear motion direction of the moving mass body is provided between the moving mass body and the shaft.

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