JP2003027416A - Vibration control device for parallel cables - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration control device which allows larger displacement of parallel cables as a member to be damped, and has excellent damping function and high durability imparted thereto. SOLUTION: According to the vibration control device 30 for the parallel diagonal tensioning bridge cables 3, 3 as the member to be damped, each cable 3 has a rubber damper 32 at a location between a cable flange 31 and a damper housing 33, and a connecting member 35 connects the damper housings 33 to each other. Each rubber damper 32 is shaped like the vee in cross section, for instance, and has a pair of V-shaped hypotenuse portions 32b, 32b diagonally extending from an apex 32a closer to the damper housing 33 toward an inner diameter of the cable. Ends of the hypotenuse portions 32b, 32b are attached to a peripheral surface 31a of the cable flange 31. When the diagonal tensioning cable 3 is radially oscillated and compressed, the V-shaped hypotenuse portions 32b, 32b of the rubber damper 32 are elastically deformed and expanded outward, to thereby absorb vibration energy.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a cable-stayed bridge cable,
The present invention relates to a vibration damping device for parallel cables in suspension bridge cables, poles, columns, street lights, road lights, traffic lights, lightning rods, chimneys, and other structures.

[0002]

2. Description of the Related Art A conventional technique will be described below by taking as an example a parallel cable damping device using a cable-stayed bridge cable used for a cable-stayed bridge as a member to be damped. FIG. 8A shows an outline of a cable-stayed bridge. In the figure, 1 is a bridge girder, 2 is a tower, 3 is a cable-stayed bridge cable, and 4 is a cable damping device. The cable damping device 4 is used for the cable-stayed bridge cable 3 under the influence of wind and traveling vehicles.
Is dampened, the load applied to the cable-stayed bridge cable 3 is alleviated, and the cable-stayed bridge cable 3 is prevented from being damaged.

This cable damping device 4 is shown in FIG.
As shown in (c), in the vicinity of the cable fixing portion 11 attached to the bridge girder, a plurality of rubber dampers 12 made of rubber having a damping property which is a kind of viscoelastic body are provided around the cable-stayed bridge cable 3 or the like. Arranged in a distributed state, rubber damper 12
Is attached to the cable fixing unit 11 side and the other end is fixed to the cable-stayed bridge cable 3 side, and is covered with a cover 13 to shield rainwater and ultraviolet rays. The rubber damper 12 is attached to the rubber damper 1 as shown in FIG. 8 (d).
A flange 1 in which a mounting plate 14 made of a steel plate adhered to one end of 2 is fixed to a fixing ring 15 at the upper end of the cable fixing portion 11
6, a mounting plate 17 made of a steel plate adhered to the other end of the rubber damper 12 is attached to the cable 3 of the cable-stayed bridge with a clamp ring 1
It is attached to the holder 19 fixed by 8.

According to this cable damping device 4, the rubber damper 12 is elastically deformed in the shearing direction by the vibration energy of the cable 3 of the cable-stayed bridge vibrating under the influence of wind and the like, and is vibrated by the reaction force in the shearing direction. To suppress the vibration of the cable-stayed bridge cable 3.

The above-described vibration damping device damps the vibration by the reaction force in the shearing direction of the rubber damper 12, which is deformed in the shearing direction by receiving the energy of the vibration. In general, in the case of a rubber body made of the same material and having the same cross-sectional area, the longitudinal elastic modulus E (σ / ε) which is the elastic modulus in the tensile direction and the lateral elastic modulus G (τ / γ) which is the elastic modulus in the shearing direction The ratio (E: G) is about 3: 1. From this, the general rubber body is deformed to a greater extent when stress is applied in the shearing direction when the same value of stress is applied in the tensile (compression) direction and when it is applied in the shearing direction. There is. In other words, a general rubber body has a property that the shear direction is softer than the tensile (compression) direction.

Therefore, like the vibration damping device 4 described above, the rubber damper 1 is elastically deformed in the shearing direction in response to the radial displacement of the cable-stayed bridge cable 3.
2 are arranged.

However, due to the shear strain of the rubber damper 12,
As shown in FIG. 9, the relationship with the reaction force when subjected to shear strain is a substantially linear relationship until the rubber damper 12 breaks. Therefore, for example, a force that is abnormally larger than the force assumed at the time of design is inclined. When it is applied to the cable bridge 3, the rubber damper 1 is not able to fully exert the reaction force due to the shear strain.
2 may be damaged beyond the elastic deformation range.

In order to prevent the vibration of the parallel cable,
It was expected that the adjacent cables would be connected with stainless wires, strings, or steel rods to increase the rigidity and damping of the cables, and that the cables would be connected to each other with a mass effect. As another method, vibration is suppressed by a damping member made of a rubber material having a damping property for a coupling member that couples the cables.

[0009]

In the former method of connecting cables to each other, the connecting points become nodes, and vibrations of different modes occur. In addition, this method uses the phase delay of the vibration displacement in a plurality of cables, and if the vibrations occur in the same phase, the damping effect cannot be obtained. Furthermore, there is a drawback that it cannot cope with out-of-plane vibration of the cable and it is difficult to estimate the damping effect in advance.

On the other hand, the latter damping structure is disclosed in Japanese Patent Laid-Open No.
-41821, each cable and the connecting member are connected via a vibration absorbing means made of high-damping rubber, and JP-A-10-159017 and JP-A-2
As disclosed in Japanese Patent Application Laid-Open No. 000-130568, there is a structure in which a part of the connecting member is configured by using a vibration damping member made of high damping rubber.

FIG. 10 is a transverse sectional view of the vibration damping device 20 disclosed in the above-mentioned Japanese Unexamined Patent Publication No. 8-41821, which is perpendicular to the axis of the vibration control device.
The high-damping rubber vibration absorbing means 22 is interposed between the parallel cables 3 and 3 and the connecting member 21.

FIG. 11 shows the above-mentioned Japanese Patent Laid-Open No. 10-15901.
In the vibration damping device 23 disclosed in Japanese Unexamined Patent Publication No. 7-27, a two-piece steel gripping member 2 that grips the parallel cables 3 and 3 respectively.
A vibration damping member 25 made of high-damping rubber having a hole 25a in the center is connected between the Nos. 4 and 24.

FIG. 12 shows the above-mentioned Japanese Patent Laid-Open No. 2000-1305.
In the vibration damping device 26 disclosed in Japanese Patent No. 68, a two-piece steel gripping member 2 that grips the parallel cables 3 and 3 respectively.
7, 7 and 27 are connected via a damping member 28 made of high-damping rubber.

A vibration damping device 20, 23, 26 for connecting the cables shown in FIGS. 10, 11 and 12 to each other via a vibration damping means 22 or vibration damping members 25, 28 made of high damping rubber.
Is weak in its ability to suppress tensile displacement, the cables 3 and 3 vibrate with a large amplitude due to aerodynamic instability phenomena such as wake flutter and wake galloping, and the phase distance of the connected cables becomes large. There has been a problem that fracture occurs when the allowable tensile displacement of the manufactured vibration absorbing member or vibration damping member is exceeded.

Therefore, it is an object of the present invention to provide a vibration damping device for a parallel cable, which has a high vibration damping property and exhibits stable performance even in a situation where a large amplitude vibration occurs due to an aerodynamic instability phenomenon. .

[0016]

According to a first aspect of the present invention, there is provided a vibration damping device for a parallel cable, wherein the vibration damping device includes a polymer elastic material having a vibration damping function, which is disposed on an outer periphery of each cable of the parallel cable. A damping device for a parallel cable, comprising at least a damper housing that supports the vibration damping member, wherein the shape of the vibration damping member is elastically deformed when stressed, and The damping member is characterized in that at least a pair of damping device portions extending between the respective cables and the respective damper housings of the cables are coupled by a coupling member.

According to the above-described vibration damping device for parallel cables,
Since the shape of the vibration damping member is configured to elastically compressively deform, tensilely deform, or shear when stressed, a high vibration damping effect can be obtained in a relatively small space. The vibration member connects at least one pair of vibration damping device portions extending between the respective cables and the respective damper housings of the cables with the connecting member, so that the relative displacement between the cables caused by the wake galloping phenomenon or the like is prevented. The vibration damping member arranged on the outer circumference of the cable synergistically damps the vibration, further effectively suppressing the vibration.

A vibration damping device for a parallel cable according to a second aspect of the invention is characterized in that the connecting member is formed of a member having a structural logarithmic damping factor of 0.01 or less.

Here, the "structural logarithmic decrement" is the logarithmic decrement of the structure itself, and the fact that the structural logarithmic decrement of the material forming the connecting member is large means that the stress acting on the cable causes the connecting member. This means that deformation easily occurs, and it becomes impossible to effectively apply a larger load to the vibration damping member. Therefore, in order to obtain a large damping effect by the damping member, the smaller the structural logarithmic decrement of the connecting member, the more desirable. The structural logarithmic decrement of the cable varies depending on its length, tension, unit weight, etc., but is generally about 0.003 to 0.01. Therefore, the structural logarithmic decrement of the connecting member should be at least 0.0 for the structural logarithmic decrement of the cable that is the damping member.
Set to 1 or less. The logarithmic decrement when the damping member is attached is given by "structural logarithmic decrement of connecting member" + "added logarithmic decrement of damping member". According to the above parallel cable vibration damping device, the deformation of the connecting member is reduced,
A load can be effectively applied to the vibration damping member, and the vibration of the parallel cable can be effectively suppressed by the vibration damping member.

According to another aspect of the present invention, there is provided a damping device for a parallel cable, wherein the damping member comprises at least a pair of damping members extending between the damping member and the damper housing. It is characterized in that the shape of the vibration damping member is deformed by the tensile stress and the shear stress acting on the vibration damping member, and the damping energy is absorbed by the hysteresis damping generated at that time.

According to the above-described vibration damping device for parallel cables,
The vibration of the parallel cable can be effectively suppressed by absorbing the vibration damping energy by the deformation of the vibration damping member.

The damping device for a parallel cable according to claim 4 further has a cable flange, and the damping member comprises:
It is characterized in that it is fixedly connected / adhered at a portion in contact with the cable flange and the damper housing.

According to the above parallel cable vibration damping device,
With cable flange and damper housing,
The vibration damping member can be reliably held, and the vibration of the cable can be effectively suppressed.

In the vibration damping device for a parallel cable according to claim 5, the vibration damping member is made of high damping rubber, and the internal loss (tan δ) of the high damping rubber is 0.2 or more and 0.7 or less.
It is characterized by the following.

According to the above parallel cable vibration damping device,
The high damping rubber provides a high vibration suppressing effect. Here, if the internal loss (tan δ) of the high damping rubber is less than 0.2, there is no vibration suppressing effect, and if it exceeds 0.7, the reaction force is too high. Therefore, the internal loss (tan
δ) is set to 0.2 or more and 0.7 or less.

According to a sixth aspect of the present invention, there is provided a parallel cable vibration damping device in which at least a pair of the vibration damping members are arranged in series with a connecting direction axis connected by the connecting member. It is a thing.

According to the above-mentioned vibration damping device for parallel cables,
The vibration damping member arranged at a position in series with the connected connecting direction axis can effectively absorb the tensile force or repulsive force acting between the parallel cables to suppress the vibration.

[0028]

BEST MODE FOR CARRYING OUT THE INVENTION A damping device 30 according to an embodiment of the present invention in which a cable-stayed bridge cable is used as a vibration-damped member will be described below with reference to the drawings.

FIG. 1 is a longitudinal sectional view in the axial direction of a vibration damping device 30 attached to cable-stayed bridge cables 3 and 3 which are parallel cables as members to be damped, and FIG. 1
FIG. 4 is a transverse sectional view taken along line AA perpendicular to the axial direction in FIG. 1 and 2 (a), 31 and 31 are cable flanges fixed to cable-stayed bridge cables 3 and 3,
2, 32 are rubber dampers as damping members, 33, 33
The inner peripheral surfaces 33a, 33a are cable flanges 31, 31
The cylindrical damper housings arranged to face the outer peripheral surfaces 31a, 31a of the rubber dampers 34, 34 are rubber dampers 3 for preventing the damper housings 33, 33 from being deformed.
Damper housing 3 with respect to the mounting positions of 2, 32
The restraint rings are attached to the outer peripheral surfaces of 3, 33.

The restraint rings 34, 34 are connected to each other by the connecting member 3.
They are connected by 5. The connecting member 35 is formed of, for example, a round bar member made of steel or the like and having a structural logarithmic decrement of 0.01 or less.

The rubber damper 32 is a rubber damping member made of a polymeric elastic material having a high damping property (for example, a loss coefficient tan δ is larger than 0.30).
As shown in (a), the cable-stayed bridge cable 3 has a V-shaped cross-sectional shape along the axial direction, and a pair of V-shaped hypotenuses obliquely extending vertically from the top portion 32a toward the inner diameter direction. It is a ring-shaped member that has portions 32b and 32b and is integrally continuous around the cable flange 31. And
A steel plate 32c is formed on the inner peripheral surface of the V-shaped hypotenuse part 32b, 32b,
32c is adhered to the outer peripheral surface 31a of the cable flange 31.
And a steel plate 32d is attached to the outer peripheral surface of the V-shaped top portion 32a, and the inner peripheral surface 33 of the damper housing 33 is attached.
It is attached to a. In this rubber damper 32, the V-shaped top portion 32a receives the vibration energy of the cable-stayed bridge cable 3, and the V-shaped hypotenuse portions 32b and 32b receive the reaction force from the damper housing 33.

More specifically, as shown in FIG. 3 (a), the rubber damper 32 has a cross section having a top portion 32a on the outer peripheral surface of the ring member and a pair of V-shaped oblique sides 32b, 32b in the inner diameter direction. , The portions k which are bent outward in a slight bulge are bent in a "dogleg" shape. When the external force for compressing in the radial direction acts on the rubber damper 32, the bent portion of the "<" shape has a pair of oblique sides 32.
Reference numerals b and 32b are portions for urging the deformation so as to deform upward and downward and increase the mutual distance.

The relationship between the width W of the top portion 32a and the distance D between the ends of the V-shaped hypotenuse portions 32b and 32b is, for example,
It is desirable that 0.75W ≦ D ≦ 1.5W. When 0.75W ≦ D ≦ 1.5W, the bending of the V-shaped hypotenuse portions 32b, 32b at the initial stage of receiving the vibration energy of the cable-stayed bridge cable 3 can be suppressed. Larger vibration energy can be absorbed at the elastically deforming stage of the parts 32b, 32b.

As a result, as shown in FIG. 3 (b), when the cable-stayed bridge cable 3 is vibrated and compressed in the radial direction, the rubber damper 32 has the vibration energy of the cable-stayed bridge cable 3 and the damper housing. Upon receiving the reaction force of 33, the upper and lower surfaces of the V-shaped hypotenuse portions 32b and 32b elastically deform and bulge outward. This rubber damper 32
Is a V-shaped slope portion 32b, as shown in FIG.
Since the elastic deformation of the hypotenuse portions 32b and 32b progresses to the extent that the space 32e surrounded by 32b almost disappears, it sufficiently withstands a compressive deformation equivalent to a compressive strain of about 50% in the radial direction of the cable-stayed bridge cable 3. Therefore, it is possible to absorb a larger displacement of the cable-stayed bridge cable 3.

Further, in this rubber damper 32,
Radial compressive strain of cable-stayed bridge cable 3 (ratio of compressive deformation amount to radial length in natural state) and its reaction force s
As shown in FIG. 4, in the initial stage of deformation at a compression strain of 0 to 30%, a larger reaction force s than the absorbed energy indicated by the broken line t in the figure can be exhibited.

That is, the rubber damper 32 causes a compressive strain of about 0 to 20% due to the vibration of the cable-stayed bridge cable 3, but must sufficiently absorb the vibration energy of the cable-stayed bridge cable 3 within the damping capacity of rubber. You can In addition, when the vibration absorption energy t of the cable-stayed bridge cable 3 is small,
Since a greater repulsive force can be exerted, a greater damping effect can be exerted.

Next, at a compressive strain of about 30% to 50%, the reaction force s is substantially constant as shown in FIG. this is,
As shown in FIG. 3 (c), a pair of V-shaped hypotenuse parts 32b,
It is shown that when the deformations in which 32b bulge outwards exceed a compressive strain of about 30%, the deformations proceed with a constant stress. When the deformation further progresses and exceeds about 50% compression strain,
The space 32e in (c) is eliminated, and the rubber damper 32 is sandwiched between the cable flange 31 and the damper housing 33, and cannot be further deformed.
Therefore, the reaction force s rapidly rises. In this state, the cable-stayed bridge cable 3 is not in a normal vibration state and is abnormally displaced, and the rubber damper 32 acts as a stopper that restrains the displacement of the cable-stayed bridge cable 3 rather than the action of suppressing vibration. ing.

That is, in the vibration damping device 30, the rubber damper 32 absorbs the vibration of the ordinary cable-stayed bridge cable 3 within its damping range at the initial stage of deformation and exhibits sufficient durability and an excellent vibration damping function. In addition, even if the cable-stayed bridge cable 3 undergoes an abnormally large displacement, it has a large allowance for compressive deformation in the radial direction and can accept a compressive strain of about 50%, so structural damage is possible. In addition, the cable-stayed bridge cable 3 has a low reaction force and exerts a larger reaction force against an abnormal displacement of the cable-stayed bridge cable 3 and can act to restrain the cable-stayed bridge cable 3.

The embodiment of the present invention has been described above.
The present invention is not limited to the above embodiment. In particular, the vibration-damped member is not limited to the cable-stayed bridge cable, but is widely applied as a vibration damper for parallel cables in suspension bridge cables, columns, street lights, road lights, traffic lights, lightning rods, chimneys, and other structures with vibration. can do.

In the above embodiment, the rubber damper 32 is
Although bonded to both the outer peripheral surface 31a of the cable flange 31 and the inner peripheral surface 33a of the damper housing 33, the steel plates 32c, 32c on the inner peripheral surface of the rubber damper 32 are not bonded to the outer peripheral surface 31a of the cable flange 31, The outer peripheral surface of the rubber damper 32 is attached to the inner peripheral surface 33a of the damper housing 33.
You may make it adhere | attach and to arrange | position. In this case, the rubber damper 32 is compressed on the side where the cable-stayed bridge cable 3 swings, and the repulsive force suppresses the vibration of the cable-stayed bridge cable 3. Similarly, the steel plate 32d on the outer peripheral surface of the rubber damper 32 is not adhered to the inner peripheral surface 33a of the damper housing 33, but the inner peripheral surface of the rubber damper 32 is adhered to the outer peripheral surface of the cable flange 31 to dispose the rubber damper 32. You may do it.

In the above embodiment, the rubber damper 32 having a V-shaped cross section has a structure in which the top 32a is on the outer peripheral side and the ends of the hypotenuse parts 32b, 32b are on the inner peripheral side. Cable flange 31 with 32a on the inner circumference side
It may be configured such that it faces the damper housing 33 side with the ends of the oblique sides 32b and 32b on the outer peripheral side.

In the above embodiment, the rubber damper 32 is a ring-shaped member which is integrally continuous in the circumferential direction around the cable-stayed bridge cable 3 as shown in FIG. 2A. It may be provided by intermittently dividing it in the circumferential direction. In this case, a plurality of rubber dampers 32 can be installed in the circumferential direction of the cable 3 of the cable-stayed bridge, and the rubber dampers 32 can be easily installed. When the rubber damper 32 is divided into a plurality of pieces and installed in this way, at least a pair of the rubber dampers 32 are arranged in series with the axis of the connecting member in the connecting direction. In such a case, the rubber damper 32 arranged in a direction in series with the axis of the connection direction of the connecting member vibrates the cables 3 and 3 against the tensile force or repulsive force acting between the cables 3 and 3. Can be effectively suppressed.
Further, in the case where the rubber damper 32 is divided and arranged in this way, as shown in FIG. 2B, the damper housing 33 ′ has a polygonal shape, and the rubber damper 32 ′, the steel plate 32c ′ and the steel plate 32d ′ are manufactured. The manufacturing cost may be reduced by forming a flat plate shape that is easy to perform.

The cross-sectional shape of the rubber damper, which is the vibration damping member, is not limited to the above. For example, in the rubber damper 41 shown in FIG. 5, the width W of the top portion 41a is formed to be wider so that a larger compression deformation is possible, and a pair of oblique sides 41b and 41b are extended in the radial direction from the upper and lower ends thereof. The cross section has a π-shaped cross section.

Further, the rubber damper 43, which is a vibration damping member shown in FIG. 6, has a D-shaped cross-section with a hollow hole 43c in the circumferential direction. For example, a D-shaped straight portion 43a is formed on the cable flange 31. It is bonded to the outer peripheral surface 31a, and the arc portion
b is opposed to the inner peripheral surface 33a of the damper housing 33. In this case, when a force is applied to the rubber damper 43 in the radial direction, the hollow portion 43c causes the arc portion 4 to move.
3b is elastically deformed in the direction of expanding in the vertical direction, and after this elastic deformation progresses to some extent, it shifts to the compressive deformation of the rubber damper 43, so that a large displacement can be absorbed and durability can be exhibited.

A rubber damper 45, which is a vibration damping member shown in FIG. 7, has a portion 45a on the cable flange 31 side,
The upper and lower sides of the damper housing 33 side portion 45b are connected to each other by a pair of arc-shaped damping portions 45c and 45d formed so as to be separated from each other.
A rugby ball-shaped circumferential hole 45e is formed between 45d. The compressive stress acting on the rubber damper 45 causes the vibration damping parts 45c and 45d on the upper and lower sides to spread in the vertical direction and elastically deform. Since the rubber damper 45 is compressed and deformed after the deformation progresses to some extent, a large displacement can be absorbed and durability can be exhibited.

[0046]

The vibration damping device of the present invention includes a vibration damping member disposed on the outer periphery of each cable of a parallel cable and including a polymer elastic material having a vibration damping function, and a damper housing supporting the vibration damping member. In a vibration damping device for a parallel cable including at least, the shape of the damping member is configured to elastically deform when subjected to stress, and the damping member includes the cables and the cables. Since at least one pair of vibration damping device portions extending between the damper housing and each of the damper housings are connected by the connecting member, the vibration damping member is elastically deformed and then compressed and deformed. A larger displacement of the vibration-damped member can be allowed in the deformation region, and a higher vibration-damping function and higher durability can be exhibited.

[Brief description of drawings]

FIG. 1 is a vertical sectional view taken along an axis of a vibration damping device according to an embodiment of the present invention.

2A is a cross-sectional view taken along the line AA perpendicular to the axis of the vibration damping device of FIG. 1, and FIG. 2B is a vertical line AA of the vibration damping device according to another embodiment. FIG.

FIG. 3 is an enlarged partial vertical cross-sectional view showing a vibration damping state of a vibration damping member of a vibration damping device according to an embodiment of the present invention, and FIG. 3 (a) is an enlarged partial vertical section showing a state where the vibration damping member is not compressed. Floor plan,
(B) is an enlarged partial vertical sectional view showing a state where the vibration damping member is partially compressed, and (c) is an enlarged partial vertical sectional view showing a state where the vibration damping member is substantially completely compressed.

FIG. 4 is a diagram showing a relationship between a compressive strain and a reaction force of the vibration damping member according to the embodiment of the present invention.

FIG. 5 is an enlarged partial vertical sectional view showing a sectional shape of a vibration damping member according to another embodiment of the present invention.

FIG. 6 is an enlarged partial vertical cross-sectional view showing a cross-sectional shape of a vibration damping member according to another embodiment of the present invention.

FIG. 7 is an enlarged partial vertical sectional view showing a sectional shape of a vibration damping member according to yet another embodiment of the present invention.

8A is a schematic view of a general cable-stayed bridge, FIG. 8B is a partial side sectional view of a conventional cable-damped bridge cable damping device, and FIG.
[Fig. 3] is an enlarged cross-sectional view perpendicular to the axis of the cable damping device in (b), and (d) is a partial enlarged view showing the damping member in (b).

FIG. 9 is a diagram showing the relationship between shear strain and reaction force.

FIG. 10 is a cross-sectional view of a conventional vibration damping device for a parallel cable.

FIG. 11 is a perspective view of a vibration damping device in another conventional parallel cable.

FIG. 12 is a perspective view of a vibration damping device in another conventional parallel cable.

[Explanation of symbols]

3 Cable-stayed bridge cable 30 Damping device 31, 31 'Cable flange 32, 32', 41, 43, 45 Damping member (rubber damper) 32a, 41a Top part 32b, 42b Inclined part 32c, 32c ', 32d, 32d' Steel plate 33, 33 'Damper housing 34, 34' Restraint ring 35 Connecting member

   ─────────────────────────────────────────────────── ─── Continued front page    F term (reference) 2D059 AA41 BB06 BB08 GG13 GG17                 2D064 AA11 BA01 BA19 CA02 CA04                       DB00 HA15 JA01 JA02                 3J048 AA01 BA02 BD08 DA06 EA39

Claims (6)

[Claims] 1. A parallel cable damper comprising at least a vibration damping member disposed on the outer periphery of each cable of the parallel cable, the damping member including a polymer elastic material having a vibration damping function, and a damper housing supporting the vibration damping member. In the vibration device, the shape of the vibration damping member is configured to elastically deform when subjected to stress, and the vibration damping member is provided between the cables and the damper housings of the cables. A vibration damping device for a parallel cable, characterized in that at least a pair of vibration damping device portions extending from each other are connected by a connecting member. 2. The structural member has a structural logarithmic decrement of 0.
The vibration damping device for a parallel cable according to claim 1, wherein the vibration damping device is configured by members of 01 or less. 3. The damping member is composed of at least a pair of damping members extending between the damping member and a damper housing, and the shape of the damping member is the same as that of the damping member. The vibration damping device for a parallel cable according to claim 1 or 2, wherein the vibration damping device is configured to be deformed by acting compressive stress, tensile stress and shear stress, and to absorb vibration damping energy by hysteresis damping generated at that time. . 4. The parallel arrangement according to claim 1, further comprising a cable flange, wherein the vibration damping member is fixedly connected and bonded at a portion in contact with the cable flange and the damper housing. Cable damping device. 5. The damping member is made of high damping rubber,
The vibration damping device for a parallel cable according to any one of claims 1 to 4, wherein the high-damping rubber has an internal loss (tan δ) of 0.2 or more and 0.7 or less. 6. The parallel arrangement according to claim 1, wherein at least a pair of the vibration damping members are arranged at a position in series with a connecting direction axis line connected by the connecting member. Cable damping device.