JP5084223B2 - Spring unit for dynamic damper adjustment - Google Patents

Description

  The present invention relates to a dynamic damper for adjusting a natural frequency of a weight of a dynamic damper having a frame fixed to a building structure and a weight supported so as to vibrate with respect to the frame. It relates to the spring unit.

  In recent years, environmental vibrations such as wind vibrations caused by strong winds and traffic vibrations caused by automobiles traveling on roads have been regarded as problems for middle- and low-rise houses. Although environmental vibrations that occur on a daily basis are very small amplitude vibrations, they may have a significant impact on the daily life of residents. In particular, steel three-story houses have high earthquake resistance and plan flexibility, but the vibrations caused by traffic vibrations and the vibrations caused by the movement of people inside are relatively close to the natural frequency of the building. It is easy to be affected by vibration. In order to effectively reduce these vibrations, in recent years, there are increasing cases of installing dynamic dampers (TMD; Tuned Mass Damper) in buildings.

  Conventionally, as a method of finely adjusting the natural frequency of the weight of the damping device corresponding to the environmental vibration, a spring is replaced with one having a different rigidity, the number of springs is adjusted, or JP-A-2001-254775 As described in the publication (Patent Document 1), by attaching a spring between the frame and the weight in the same direction as the vibration direction of the weight and changing the spring constant of the spring, the natural vibration of the weight is changed. There is a method of fine-tuning by changing the number.

  On the other hand, since the dynamic damper is installed in the upper part of the building, it is often installed in the back of the ceiling, and the adjustment of the natural frequency of the weight is performed on the ceiling in an unstable posture standing on a stepladder. Work while looking into the inspection port.

  For example, Japanese Unexamined Patent Application Publication No. 2003-166365 (Patent Document 2) and Japanese Unexamined Patent Application Publication No. 2005-54360 (Patent Document 3) describe that a plurality of damper adjustment units are provided for one weight. Has been. Japanese Patent Laid-Open No. 2001-124136 (Patent Document 4) describes that a frequency adjusting mechanism for adjusting the natural frequency of the vibration system is provided at the center of the vibration damping device.

JP 2001-254775 A JP 2003-166365 A JP-A-2005-054360 JP 2001-124136 A

  However, the technique disclosed in Patent Document 1 has a problem that it is difficult to finely adjust the natural frequency of the weight because the spring for damping is directly adjusted. Multiple damper adjustment units must be prepared for each weight, multiple damper adjustment units must be individually adjusted during adjustment, and a large opening area is required for the ceiling There is a problem of becoming.

  Further, in the technique of Patent Document 4, although one frequency adjusting mechanism is prepared for one weight, the structure is complicated, so when it is readjusted after being installed once, the ceiling or the like is used. There was a problem that it was not possible to easily remove and adjust only the frequency adjusting mechanism from the inspection port.

  SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and an object of the present invention is to provide a coil spring of a dynamic damper adjusting spring unit for adjusting the natural frequency of the weight of the dynamic damper as a central lower part or a central upper part of the weight. The inspection opening that is opened when adjusting the dynamic damper can be made smaller by combining them in a compact, easy adjustment work, no twisting of the vibration of the weight, and smooth movement of the weight. It is an object of the present invention to provide a dynamic damper adjusting spring unit, a dynamic damper having the same, and a method of adjusting the dynamic damper.

Configuration of the dynamic damper adjusting spring unit according to the present invention for achieving the above object comprises a frame which is passed hung on the beam member of a building, a weight which is oscillatably supported with respect to the frame, the A dynamic damper adjusting spring unit for adjusting the natural frequency of the weight of the dynamic damper, comprising: a plurality of coil springs for adjusting the natural frequency in the vibration direction of the weight; and the plurality of coil springs. a first mounting member for connecting one end to the weight, the other ends of the plurality of coil springs have a, a second mounting member for connection to said frame, said second mounting body The frame comprises an opening at the center, and is detachably fixed to the bottom surface of the frame. The first mounting body can be attached to and detached from the lower center of the weight through the opening of the second mounting body. In And characterized in that it is a constant.

  According to the configuration of the dynamic damper adjusting spring unit according to the present invention, the ends of the plurality of coil springs are concentratedly connected to the first attachment body provided at the center lower part or the center upper part of the weight to thereby reduce the weight of the dynamic damper. The coil spring of the dynamic damper adjustment spring unit for adjusting the natural frequency of the weight can be compactly integrated into the lower center or upper center of the weight, and there is one inspection port that opens when adjusting the dynamic damper. In addition, the weight can be reduced, the adjustment work can be easily performed, the weight does not vibrate, and the weight moves smoothly.

  In addition, the dynamic damper adjustment spring unit can be easily attached and detached from the inspection port when adjusting the dynamic damper, making adjustment work easier, and opening the inspection port at one location in the center and making it smaller. It can be configured as a dynamic damper that does not cause twisting in the vibration of the weight and can move the weight smoothly.

  An embodiment of a dynamic damper adjusting spring unit according to the present invention will be specifically described with reference to the drawings. FIG. 1 is a cross-sectional explanatory view showing a configuration of a first embodiment of a dynamic damper having a dynamic damper adjusting spring unit according to the present invention, and FIG. 2A is provided with a dynamic damper adjusting spring unit according to the present invention. FIG. 2B is a plan view showing the configuration of the second embodiment of the dynamic damper having the dynamic damper adjusting spring unit according to the present invention, and FIG. It is a disassembled perspective view which shows the structure of 2nd Embodiment of the dynamic damper provided with the spring unit for dynamic damper adjustment which concerns on this invention.

  1 and 2 (a), an angle member 2 is placed and fixed on a lower flange 1a of a beam member 1 serving as a building structure, and a frame 3 of a dynamic damper 6 is fixed to the angle member 2. Yes. On the bottom surface portion 3b of the frame 3, a weight 5 is supported by a laminated rubber 17 serving as a weight support and a spring 4 so as to vibrate. A spring 4 is attached between the standing side part 3 a of the frame 3 and the weight 5. Thus, the dynamic damper 6 is configured.

  The weight support may be configured to support vibration through a sphere instead of the laminated rubber 17, or may support the weight 5 so as to be able to vibrate with an elastic member such as rubber instead of the spring 4. good.

  Reference numeral 7 denotes a dynamic damper adjusting spring unit for adjusting the natural frequency of the weight 5. The coil spring 8 for adjusting the natural frequency in the vibration direction of the weight 5 and one end of the coil spring 8 are connected to the weight. A rectangular connecting plate 9 serving as a first mounting body for connection to the central lower portion of 5 and a rectangular frame 10 serving as a second mounting body for connecting the other end of the coil spring 8 to the frame 3. And is configured. The frame body 10 of the present embodiment has an L-shaped cross section, and has a rectangular frame shape with a side portion 10a made up of a standing piece and a flange portion 10b made up of a horizontal piece, with a central portion passing therethrough. Is done.

  Both ends of the coil spring 8 are detachably locked by various locking means such as holes, claws and arms provided in the connecting plate 9 and the frame body 10.

  The ceiling plate 12 disposed below the angle member 2 has an inspection port 13 having a size corresponding to the outer shape of the frame 10 serving as the second mounting body at a position corresponding to the position immediately below the dynamic damper adjusting spring unit 7. Is provided so that the door 12a is opened and the dynamic damper adjusting spring unit 7 is removed from the inspection port 13 or attached.

  A rectangular opening 3b1 through which the side 10a of the frame 10 can be inserted is formed in the bottom 3b of the frame 3, and the side 10a of the frame 10 is formed from the inspection port 13 side to the opening 3b1. Is inserted into contact with the lower surface side of the bottom surface portion 3b of the frame 3, and the through hole 10b1 formed in the flange portion 10b and the through hole formed in the bottom surface portion 3b of the frame 3 are inserted. The bolt 14 is inserted into the inspection port 13 side through 3b2, and the bolt 14 is screwed into the nut portion 15 welded to the upper surface of the bottom surface portion 3b corresponding to the through hole 3b2 formed in the bottom surface portion 3b of the frame 3. By fastening together, the other end of the coil spring 8 is connected to the frame 3 via a frame body 10 serving as a second attachment body.

  As shown in FIGS. 1 and 2A, the dynamic damper adjusting spring unit 7 of the present embodiment has two directions (X direction) in which the adjusting direction of the natural frequency of the weight 5 is on the same horizontal plane and orthogonal to each other. , Y direction), each of which has a pair of coil springs 8 around a connecting plate 9 serving as a first attachment body.

  A bolt member 11 serving as a mounting portion for detachably mounting the connecting plate 9 serving as the first mounting body hangs down from the center lower portion of the weight 5 formed in a square shape. A connecting plate serving as a first mounting body is formed by inserting the bolt member 11 through a through hole 9a formed in the central portion of the connecting plate 9 from the 13 side, and screwing and fastening a nut 18 to the bolt member 11. 9 is fixed to the center lower part of the weight 5, whereby one end of the coil spring 8 is connected to the center lower part of the weight 5. In the figure, reference numeral 19 denotes a lock nut.

  As a method for adjusting the dynamic damper 6 having the above-described configuration, a connecting plate 9 serving as a first attachment body of the dynamic damper adjusting spring unit 7 is provided with a bolt member (from the bottom surface side of the frame 3 to the center lower portion of the weight 5 ( (Parallel male screw) 11 is detachably attached to the frame body 10 as a second attachment body so as to be detachably attached to the bottom surface portion 3b of the frame 3, and the nut 18 is removed when the dynamic damper 6 is adjusted. The connecting plate 9 serving as the first mounting body is removed from the bolt member 11, and the bolt 14 is removed to remove the frame body 10 serving as the second mounting body from the frame 3, whereby the dynamic damper adjusting spring unit 7 is removed from the frame 3. The spring constant of the coil spring 8 attached to the dynamic damper adjusting spring unit 7 is adjusted while being removed from the weight 5. Accordingly, it is possible to adjust the natural frequency of the weight 5.

  Here, as a method of adjusting the spring constant of the coil spring 8, the number of the coil springs 8 is changed, the thickness of the coil spring 8 is changed to change the spring constant, or the variable position length of the coil spring 8 is changed. Thus, the spring constant of the coil spring 8 can be adjusted.

  FIGS. 2B and 3 show the configuration of the second embodiment of the dynamic damper provided with the dynamic damper adjusting spring unit according to the present invention, and the adjustment direction of the natural frequency of the weight 5 is different in the height direction. A pair of or more coil springs 8 are installed around the connecting plates 21 and 22 serving as the first mounting body in two directions (X direction and Y direction) orthogonal to each other on a horizontal plane.

  The connecting plate 21 serving as the first attachment body of the present embodiment has a cross-sectional hat shape, and the connecting plate 22 has a T-shaped cross section. Note that both of the connecting plates 21 and 22 serving as the first attachment body can be configured as a cross-sectional hat type.

  The protruding portion 21a of the connecting plate 21 arranged at the low position is arranged so as to protrude upward, and the protruding portion 22a of the connecting plate 22 arranged at the high position is arranged so as to protrude downward. Then, the through holes 21a1 and 22a1 formed in the projecting portions 21a and 22a are inserted into the bolt member 11 projecting depending on the center lower portion of the weight 5 as shown in FIG. Then, the nut 18 is screwed and fastened to the bolt member 11 so that one end of the coil spring 8 is overlapped via the connecting plates 21 and 22 serving as a first attachment body in which one end of the coil spring 8 is detachably locked. Connected to the lower center of the weight 5.

  The other end of the coil spring 8 is in two directions (X direction, Y direction) that are orthogonal to each other on horizontal planes that differ in the height direction by a locking means (not shown) provided on the side portion 10a of the frame 10 serving as the second attachment body. The coil springs 8 that are detachably locked in the two directions (X direction and Y direction) orthogonal to each other are supported so as to be able to vibrate in the respective directions at positions that do not interfere with each other.

  In the case of this embodiment, as shown in FIGS. 2A and 2B and compared, the coil springs 8 are arranged in two directions (X direction and Y direction) orthogonal to each other on the same horizontal plane in the first embodiment. In this case, dead spaces 16 are generated at the four corners in the frame 10, but the coil springs 8 are stepped in two directions (X direction and Y direction) perpendicular to each other on different horizontal planes as in the second embodiment. By arranging, the dead space 16 as in the first embodiment does not occur, and the space can be used effectively. Other configurations are the same as those in the first embodiment, and the same effects can be obtained.

  In each of the above-described embodiments, the connecting plate 9 or the connecting plates 21 and 22 serving as the first mounting body is detachably attached to the central lower portion of the weight 5, and the connecting plate 9 or the connecting plate serving as the first mounting body is connected. The plates 21 and 22 are detachably attached from the bottom surface portion 3b side of the frame 3 to the central lower portion of the weight 5, and the frame body 10 serving as the second attachment body is detachably attached to the bottom surface portion 3b of the frame 3 Although the example in the case of operating from the inspection port 13 provided in 12 was demonstrated, as another structure which reversed the top and bottom, the connection board 9 or the connection boards 21 and 22 used as the 1st attachment body are made into the center of the weight 5 Removably attached to the upper part, the connecting plate 9 or the connecting plates 21 and 22 serving as the first attaching body is detachably attached to the central upper part of the weight 5 from the upper surface side of the frame 3 and becomes the second attaching body. A frame 10 is detachably attached to the upper surface of the frame 3 and is mounted on the dynamic damper 6. It may be configured to operate from.

  According to the above configuration, the dynamic damper 6 is connected by concentrating and connecting one end of the plurality of coil springs 8 to the connecting plates 9, 21, 22 serving as the first attachment body provided at the center lower part or the center upper part of the weight 5. The coil spring 8 of the dynamic damper adjusting spring unit 7 for adjusting the natural frequency of the weight 5 can be compactly integrated into the center lower part or the center upper part of the weight 5 so that the dynamic damper 6 can be adjusted. The opened inspection port 13 can be made small at one place, the adjustment work can be easily performed, and the weight 5 can be smoothly moved without causing a twist in the vibration of the weight 5.

  Further, as in the first embodiment shown in FIGS. 1 and 2A, the adjustment direction of the natural frequency of the weight 5 is set in two directions on the same horizontal plane and orthogonal to each other, and the first mounting body The natural frequency of the weight 5 with respect to the two orthogonal directions can be adjusted by employing a configuration in which each of the pair of coil springs 8 is provided with the connecting plate 9 as a center.

  Further, as in the second embodiment shown in FIGS. 2B and 3, the first mounting is performed in two directions on a horizontal plane in which the adjustment direction of the natural frequency of the weight 5 is different in the height direction and orthogonal to each other. By adopting a configuration in which a pair of or more coil springs 8 are installed around the connecting plates 21 and 22 as bodies, the coil springs 8 arranged in two orthogonal directions are stepped on different horizontal planes in the height direction. By disposing, the dead space 16 can be eliminated when the connecting plate 9 as the first attachment body has a flat rectangular shape as in the first embodiment, and the inspection port 13 opened when adjusting the dynamic damper 6 is provided. More coil springs 8 can be installed in a smaller space.

  Further, by making the second attachment body into the rectangular frame body 10, the second attachment body can be unitized and attached to and detached from the frame 3.

  Further, according to the dynamic damper 6 according to the present invention, the dynamic damper adjusting spring unit 7 can be easily detached from the inspection port 13 when adjusting the dynamic damper 6, so that the adjustment work can be easily performed and the inspection port 13 that opens. The dynamic damper 6 can be configured to be small at one central portion, and the torsion is not generated in the vibration of the weight 5 and the movement of the weight 5 can be smoothly performed.

  Further, according to the method of adjusting the dynamic damper 6 according to the present invention, the dynamic damper adjusting spring unit 7 can be easily detached from the frame 3 and the weight 5 from one small inspection port 13 when adjusting the dynamic damper 6. After adjustment, the spring constant of the coil spring 8 attached to the dynamic damper adjusting spring unit 7 is adjusted, and then the dynamic damper adjusting spring unit 7 is again attached to the frame 3 and the heavy load from one small inspection port 13. It can be easily attached to the weight 5, and the natural frequency of the weight 5 can be easily adjusted by a simple operation.

  As an application example of the present invention, for adjusting the natural frequency of the weight of a dynamic damper having a frame fixed to a building structure and a weight supported so as to be vibrated by a spring with respect to the frame. The present invention can be applied to a dynamic damper adjusting spring unit, a dynamic damper having the same, and a dynamic damper adjusting method.

It is a section explanatory view showing composition of a 1st embodiment of a dynamic damper provided with a spring unit for dynamic damper adjustment concerning the present invention. (A) is a top view which shows the structure of 1st Embodiment of the dynamic damper provided with the spring unit for dynamic damper adjustment concerning this invention, (b) is the dynamic damper provided with the spring unit for dynamic damper adjustment concerning this invention It is a top view which shows the structure of 2nd Embodiment. It is a disassembled perspective view which shows the structure of 2nd Embodiment of the dynamic damper provided with the spring unit for dynamic damper adjustment which concerns on this invention.

DESCRIPTION OF SYMBOLS 1 ... Beam material 1a ... Lower flange 2 ... Angle material 3 ... Frame 3a ... Side part 3b ... Bottom part
3b1 ... Opening
3b2 ... Through hole 4 ... Spring 5 ... Weight 6 ... Dynamic damper 7 ... Spring unit for dynamic damper adjustment 8 ... Coil spring 9 ... Connecting plate 9a ... Through hole
10 ... Frame
10a ... side
10b ... Flange
10b1 ... through hole
11 ... Bolt material
12 ... Ceiling board
12a ... door
13 ... Inspection port
14 ... Bolt
15 ... Nut
16 ... dead space
17 ... Laminated rubber
18 ... Nut
19 ... Lock nut
21,22 ... Connecting plate
21a, 22a ... Projection
21a1, 22a1 ... through hole

Claims (1)

A frame that is passed hung on the beam member of a building, the dynamic damper adjusting spring unit for adjusting the natural frequency of the heavy weight of the dynamic damper having a weight which is oscillatably supported with respect to said frame Because
A plurality of coil springs for adjusting the natural frequency in the vibration direction of the weight;
A first attachment for connecting one end of the plurality of coil springs to a central lower portion of the weight;
Have a, a second mounting member for connecting the other ends of the plurality of coil springs to said frame,
The second attachment body is formed of a frame having an opening at the center, and is detachably fixed to the bottom surface portion of the frame.
The dynamic damper adjusting spring unit, wherein the first attachment body is detachably fixed to a lower center portion of the weight through an opening of the second attachment body .

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