JP2001336569A - Vibration damping device for suspending heavy object - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration damping device for a suspending heavy object promptly ceasing swinging of the heavy object. SOLUTION: This vibration damping device A installed between a supporting structure body 1 and the suspending heavy object is composed of a primary side vibration damping mechanism part a1 having a device fixing part 3 mounted to the supporting structure body 1, a primary side horizontal shaft 4 supported by the device fixing part 3, a primary side rotor mounted to the primary side horizontal shaft 4, and a primary side stator 7 fixed on the device fixing part 3 and filled with a primary side viscous resistance element in a space between the stator 7 and the stored primary side rotor; and a secondary side vibration damping mechanism part a2 having a hanging shaft 8 fixed on the primary side horizontal shaft 4, a secondary side horizontal shaft 9 arranged so as to be orthogonal to the primary side horizontal shaft 4, a secondary side rotor mounted to the secondary side horizontal shaft 9, and a secondary side stator 12 filled with a secondary side viscous resistance element in a space between the stator 12 and the stored secondary side rotor and connected to the suspending heavy object 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration damping device for a suspended heavy object that quickly stabilizes a swing of a chandelier or a monument suspended from a support structure of a hotel or building hall.

[0002]

2. Description of the Related Art Luxurious chandeliers and monuments are suspended from the ceiling of a hall or a hall, such as a hall or a banquet room for a large number of people, at the entrance of a hotel or building. Suspended heavy objects, such as chandeliers and monuments, pass through the open air when the door is opened, the air flow such as turbulence or rectification constantly flowing from the indoor air conditioner, or the outdoor road. Due to an irregular low frequency disturbance from a heavy vehicle, the vehicle may vibrate slowly with a small amplitude or violently with a large amplitude at its natural frequency.

[0003] These suspended heavy objects suspended from the support structure continue to oscillate for a long time even after the cause of the above-mentioned vibrations is resolved, as well as while the causes of the vibrations are eliminated. Therefore, in order to prevent the shaking, attempts have been made to pull a piano wire from a suspended heavy object in all directions, attach it to a support structure, and fix it. However, such an innocent piano wire has the drawback that the precious chandeliers and artistic monuments lose their aesthetic appeal and detract from the interest of the viewer.

[0004]

The problem to be solved by the present invention is that a heavy object such as a chandelier or a monument can be stored in the back of a ceiling instead of being an innocent thing such as a piano wire, so that it cannot be noticed from the outside. An object of the present invention is to develop a vibration damping device for a suspended heavy object that can be hung and hardly shakes even if a cause of the shake is generated, and can quickly end the shake after the cause of the shake is eliminated.

[0005]

[Claim 1] The claim 1 is provided between a support structure (1) and a suspended heavy object (2) suspended from a support structure (1) of a building. , A suspension of a suspended heavy object (A) for quickly stabilizing the swing of the suspended heavy object (2)
(A) a device fixing portion to be mounted on the support structure (1)
(3) and (b1) the primary horizontal shaft (4) rotatably supported by the device fixing part (3), (b2) the primary rotor mounted on the primary horizontal shaft (4) (5), (b3) The primary-side viscous resistor (6) is fixed to the device fixing part (3), accommodates the primary-side rotor (5), and is interposed between the primary-side rotor (5). A primary-side vibration damping mechanism (a1) having a filled primary-side stator (7), and (c1)
Hanging axis (8) fixed to primary horizontal axis (4), (c2)
The secondary horizontal shafts (9), (c3) fixed to the hanging shaft (8) and arranged orthogonal to the primary horizontal shaft (4) are mounted on the secondary horizontal shaft (9). Secondary rotor (10), (c4) The secondary rotor (10) is housed, and a secondary viscous resistor (11) is filled between the secondary rotor (10) and the secondary rotor (10). And a secondary-side vibration suppression mechanism (a2) having a secondary-side stator (12) to which the suspended heavy object (2) is connected. "

According to this, after the cause of shaking, such as the wind blown into the room from the above-mentioned opening, the flow of air from the air conditioner, or external disturbance, is stopped, chandeliers and monuments suspended from the support structure are suspended. The lower weight (2) is
The secondary stator (12) and / or the primary rotor (5) that coincides with the direction of the oscillation continues to oscillate at the natural frequency, and the secondary rotor (10) and / or the primary stator (7) ). The secondary-side stator (12) and the secondary-side rotor (10) or / and the primary-side rotor (5) and the primary-side stator (7) are connected to the primary-side viscous resistor (6) and / or the secondary Since the rotations are close to each other via the side viscous resistor (11), the rotation produces viscous resistance by the primary viscous resistor (6) and / or the secondary viscous resistor (11). As a result,
The vibration energy of (2) is rapidly absorbed by the primary viscous resistor (6) and / or the secondary viscous resistor (11), and the swing of the suspended heavy object (2) ends in a short time.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a vibration damping device (A) according to the present invention will be described below in detail with reference to the drawings. This vibration damping device (A) is composed of a device fixing part (3) mounted on the support structure (1), a primary vibration damping mechanism (a1), and a secondary vibration damping mechanism (a2). Have been.
The device fixing part (3) supports the primary-side vibration damping mechanism (a1) and the secondary-side vibration damping mechanism (a2), and includes a slab (14) or a beam,
It is fixed to a support structure (1) such as a pillar or a pole. Here, the slab (14) will be taken as an example of the support structure (1), and the mounting structure of the device fixing portion (3) to the slab (14) will be described as a typical example. The pedestal (13) of the device fixing part (3) is buried in the slab (14), and is fixed to a support (16) buried in the floor (15) of the slab (14) and the slab (14). It is integrated into. A primary-side vibration damping mechanism (a
A block (17) for attaching 1) is fixed.

A pair of arms are provided on the lower surface of the block (17).
A primary horizontal shaft (4) of the primary vibration damping mechanism (a1) is rotatably mounted via a bearing (19).

The primary horizontal shaft (4) of the primary vibration control mechanism (a1)
At both ends (of course, only one end)
The hanging shaft (8) of the secondary vibration damping mechanism (a1) is integrally fixed to the center of the primary horizontal shaft (4). The primary rotor (5) is a cylindrical block,
A narrow disk portion (21) protrudes from the periphery of the shaft mounting portion (20) on which the primary horizontal shaft (4) is fitted, and is wider around the periphery and has a cylindrical surface on the outer periphery. Viscous resistance action part (2
2) is protruding. The disc portion (21) has a plurality of through holes (23) penetrating therethrough at predetermined intervals.

[0010] The primary rotor (5) is housed therein.
The stator body (7a) of the secondary-side stator (7) is formed in accordance with the disk portion (21) and the viscous resistance action part (22) so that the internal space can rotatably store the primary-side rotor (5). The filling space (24) for filling the primary viscous resistor (6) such as silicone oil with the closing lid (7b) fitted in the opening is formed. Of the filling space (24),
The gap between the outer peripheral surface (28) of the viscous resistance action portion (22) and the inner peripheral surface (29) of the stator body (7a) is formed to be extremely narrow, and this portion is defined as a viscous resistance generation gap (25). . The primary rotor (5) is rotatably supported by the primary stator (7) via a bearing (26) and an oil seal (27) without oil leakage.

The primary-side stator (7) includes a device fixing portion (3)
The primary horizontal shaft (4) is fixed to the pedestal (13) or the block (17) and is fixed to the fixed primary stator (7).
At the same time, the primary rotor (5) relatively rotates.

Next, the secondary vibration damping mechanism (a2) will be described. The structure of the secondary vibration damping mechanism (a2) is provided via a hanging shaft (8).
They are exactly the same except that they are installed at right angles to (a1). That is, a secondary rotor (10) is integrally attached to both ends of the secondary horizontal shaft (9) of the secondary vibration damping mechanism (a2),
The lower end of the hanging shaft (8) is integrally fixed to the center of the secondary horizontal shaft (9). The secondary side rotor (10) is also a cylindrical block body, and the shaft mounting portion (3) on which the secondary side horizontal shaft (9) is fitted.
A narrow disk portion (31) protrudes from the periphery of (0), and a viscous resistance action portion (32) having a wide shape and an outer periphery formed of a cylindrical surface protrudes around the narrow disk portion (31). The disc portion (31) has a plurality of through holes (33) penetrating therethrough at predetermined intervals.

A housing 2 in which the secondary rotor (10) is housed.
The stator body (12a) of the secondary stator (12) is formed in accordance with the disk part (31) and the viscous resistance action part (32) so that the internal space can rotatably store the secondary rotor (10). The filling space (34) for filling the secondary viscous resistor (11) such as silicone oil with the closing lid (12b) fitted in the opening is formed. Of the filling space (34), the outer peripheral surface (38) of the viscous resistance action portion (32) and the stator body (1
The gap with the inner peripheral surface (39) of 2a) is formed extremely narrow,
This portion is referred to as a viscous resistance generating gap (35). The secondary rotor (10) is rotatably supported by the secondary stator (12) via a bearing (36) and an oil seal (37) without oil leakage.

A suspended heavy object (2) is suspended from a suspended block (40) constituting a part of the secondary-side stator (12), or a suspended block (40) constituting a part of the suspended heavy object (2). A lower bar (41) is attached. Ceiling components such as inorganic fiber boats (50)
Is suspended from the slab (14) to form a ceiling, and the suspension bar (41) is suspended through the ceiling component (50). Therefore, the present device (A) integrally attached to the slab (14) is located behind the ceiling of the ceiling component (50) and cannot be seen from the indoor side at all.

Thus, for example, when a door of a hall where a suspended heavy object (2) such as a chandelier or a monument is suspended on a windy day is opened, a strong wind blows into the room and a suspended heavy object (2) is blown into the room. 2) is shaken, the air volume is increased to sufficiently effect air conditioning, or the suspended heavy object (2) suspended from the support structure (1) is shaken by disturbance.
This shaking oscillates at the natural frequency of the suspended heavy object (2), and remains even after the cause of the shaking has subsided. If no measures are taken, the vibration is slightly attenuated as shown in FIG. 7 (a). Keep shaking for a long time.

On the other hand, when the apparatus (A) is installed, the operation is rapidly terminated as shown in FIG. 7 (b). In other words, the suspended heavy objects (2) such as chandeliers and monuments suspended from the support structure (1) do not contain the cause of turbulence or rectification of air blown from wind or air conditioning, or the cause of swaying from the outside. Even after this, it will continue to shake at its natural frequency, but if this device (A) is installed, the secondary side stator (12) or primary side rotor (5) or Both (5) and (12) rotate relatively to absorb the energy of the sway and quickly end the sway.

More specifically, when the vibration direction is perpendicular to the secondary horizontal axis (9) (that is, the axial direction of the primary horizontal axis (4) = X direction in FIG. 5), the primary The secondary horizontal shaft (4) does not rotate and therefore the secondary horizontal shaft (9) does not move, and the secondary stator (12)
Only reciprocate around the secondary horizontal axis (9). Conversely, the vibration direction is the axial direction of the secondary horizontal axis (9) (ie, the primary horizontal axis).
In the case of the direction perpendicular to (4) = Y direction in FIG. 5, the secondary horizontal axis
(9) does not rotate, so the secondary side stator (12) does not move,
Only the secondary horizontal shaft (4) reciprocates to rotate the primary rotor (5). On the other hand, when the vibration direction is oblique to the secondary horizontal axis (9) and the primary horizontal axis (4), it was connected to the primary horizontal axis (4) in proportion to the component force. Primary rotor (5)
And the secondary side stator (12) reciprocately rotate.

As described above, when the primary horizontal shaft (4) and the secondary stator (12) reciprocate, respectively, the primary horizontal shaft (4) is rotated.
Primary rotor (5) and primary stator (7) fixed to
Or a relative reciprocating rotational movement occurs between the secondary stator (12) and the secondary rotor (10) fixed to the secondary horizontal shaft (9), and is formed mainly between the two. Between the viscous drag generating gap (25) and (35)
The secondary viscous resistor (6) or the secondary viscous resistor (11) exhibits high viscous resistance to absorb the vibration energy of the suspended heavy object (2), and shakes the suspended heavy object (2). Terminate in a short time. FIG. 7B shows this state. In the case of the figure, about 30
Ends in seconds.

Through holes (23) and (33) are formed in the disk portions (21) and (31) of the primary and secondary rotors (5) and (10). Occurs, the internal viscous resistor
(6) (11) is such that it can easily move through it.

[0020]

According to the device of the present invention, since the primary vibration damping mechanism and the secondary vibration damping mechanism having viscous resistance are arranged at right angles to each other, vibrations input from any direction can be prevented. On the other hand, this can be effectively absorbed, and the suspended heavy object suspended from the support structure via the present apparatus can be quickly settled.

[Brief description of the drawings]

FIG. 1 is a front view of a state in which a suspended heavy object is suspended from a support structure via a vibration damping device according to the present invention.

FIG. 2 is an enlarged front view of the vibration damping device of FIG. 1;

FIG. 3 is a side view of FIG. 2;

FIG. 4 is a sectional view showing the internal structure of the vibration damping device according to the present invention.

5 is a partial cross-sectional plan view of the primary vibration damping mechanism shown in FIG. 4;

6 is a partial cross-sectional plan view of the secondary vibration damping mechanism shown in FIG. 4;

FIG. 7 is a comparison graph of the vibration damping effect of the device of the present invention and the conventional example.

[Explanation of symbols]

 (A) Device of the present invention (a1) Primary-side vibration damping mechanism (a2) Secondary-side vibration damping mechanism (1) Support structure (2) Suspended heavy object (3) Device fixing part (4) Primary Horizontal shaft (5) Primary rotor (6) Primary viscous resistor (7) Primary stator (8) Hanging shaft (9) Secondary horizontal shaft (10) Secondary rotor (11) 2 Secondary viscous resistor (12) Secondary stator

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Kunio Ukai, Inventor Nikken Sekkei Co., Ltd. 4-6-1 Komyo-bashi, Chuo-ku, Osaka-shi (72) Inventor Masayuki Avano 4-6-1, Komyo-bashi, Chuo-ku, Osaka-shi Inside Nikken Sekkei Co., Ltd. (72) Inventor Teru Hata 10-133 Minami Hatsushima-cho, Amagasaki-shi, Hyogo Patent Equipment Co., Ltd. (72) Inventor Shohei Minbu 10-133 Minami-Hatsushima-cho, Amagasaki-shi, Hyogo Patent Equipment Co., Ltd. (72) Inventor Kenichi Endo 10-133 Minami Hatsushima-cho, Amagasaki City, Hyogo Patent Equipment F-term (reference) 3J048 AA06 AC05 BE13 DA07 EA38

Claims (1)

[Claims] 1. A suspended heavy object, which is installed between a suspended heavy object suspended from a support structure of a building and the support structure, and for quickly stabilizing the swing of the suspended heavy object. (B) a primary horizontal shaft rotatably supported by the device fixing portion, and (b2) a primary horizontal shaft. (B3) a primary side rotor fixed to a device fixing portion, containing the primary side rotor, and filled with a primary side viscous resistor between the primary side rotor and the primary side rotor (C1) a hanging shaft fixed to the primary horizontal shaft, and (c2) a hanging shaft fixed to the hanging shaft and orthogonal to the primary horizontal shaft. (C3) a secondary rotor mounted on the secondary horizontal shaft, (c4) a secondary viscous between the secondary rotor and the secondary rotor. The resistor is A secondary-side vibration damping mechanism comprising: a secondary-side stator to which a suspended and suspended suspended heavy object is connected; and a vibration-damping device for a suspended heavy object. .