JPH08216875A - Dynamic vibration absorber of pendulum structure - Google Patents

Abstract

PURPOSE: To make accurate restraint so as to be generated even in a small roll as securing large restraint in time of a large roll, in this dynamic vibration absorber restraining any rolling motion in a carrier of a ropeway. CONSTITUTION: A guide rail 22a is equipped with the layer of a conductor 35 extending circularly in the rolling direction of a carrier, and being clamped to a suspension arm and to the top face side. A mass body 24a equips a magnet 38a standing face-to-face with the conductor 35 at an interval, at the underside of a mass body proper 32, and it is free of movements on the guide rail 22a by means of rolling motion of wheels 34.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dynamic vibration reducer for a pendulum structure that suppresses rolling of a pendulum structure such as a ropeway, a gondola lift, and a ski lift due to wind.

[0002]

2. Description of the Related Art A basic patent for a dynamic vibration absorber having a pendulum structure has been filed in Japanese Patent Application No. 5-71696 by Hiroshi Matsuhisa, a professor at Kyoto University, and presented at an academic conference.

[0003]

In the dynamic vibration absorber of the pendulum structure, the mass body moves smoothly even with a small roll while ensuring a large restraining force when the roll is large.
Ideally, there should be a rolling restraint.

The conventional dynamic vibration absorber having a pendulum structure does not have such ideal performance.

It is an object of the invention of claim 1 to provide a dynamic vibration reducer of a pendulum structure which overcomes the problems of the prior art. An object of the invention of claim 2 is to provide a dynamic vibration absorber of a pendulum structure in which the structure of the eddy current braking means is simplified. The object of the invention of claims 3 and 4 is to
A dynamic vibration absorber for a pendulum structure capable of increasing the eddy current braking force. An object of the invention of claim 5 is to provide a dynamic vibration absorber of a pendulum structure having improved speed proportional braking characteristics. It is an object of the inventions of claims 6 and 7 to provide a dynamic vibration reducer of a pendulum structure capable of downsizing the eddy current braking means. It is an object of the invention of claim 8 to provide a dynamic vibration absorber of a pendulum structure capable of forming an efficient magnetic circuit for generating an eddy current.

[0006]

The present invention will be described using reference numerals in the drawings corresponding to the embodiments. The dynamic vibration absorber (20, 26) of the pendulum structure (12) according to claim 1 has the following (a) to (c):
It has the following components. (A) Guide rails (22, 2) attached to the pendulum structure body (14, 16) and extending in the swing direction of the pendulum structure body (14, 16)
8) (b) Mass body (24) movable along the guide rails (22, 28) (c) Relative displacement due to relative displacement between the guide rails (22, 28) and mass body (24) The conductor (35,52,54,58) and the magnet (38a-e) are provided, and the conductor (35,52,54,58) and the magnet (38a-e) are moved by the relative speed between the conductor (35,52,54,58) and the magnet (38a-e). Eddy current in (58) to produce a conductor (35, 5
2,54,58) and eddy current braking means (35,38a-e, 52,54,58) that reduce the relative speed between the magnet (38a-e) and

A dynamic vibration absorber (2) for a pendulum structure (12) according to claim 2.
0a, b, 26a, b), in the dynamic vibration absorber (20a, b, 26a, b) of the pendulum structure (12) of claim 1, the guide rail (22a,
b, 28a, b) is provided with a conductor (35) on the side facing the mass body (24a, b). The mass body (24a, b) is a guide rail (22a, b, 28a,
A magnet (38a, b) is provided on the side facing b).

The dynamic vibration absorber (2) for the pendulum structure (12) according to claim 3.
0a, b, 26a, b), in the dynamic vibration absorber (20a, b, 26a, b) of the pendulum structure (12) according to claim 2, further, the guide rail (22a,
b, 28a, b) includes a magnetic body (36) on the side opposite to the mass body (24a, b) with respect to the conductor (35).

A dynamic vibration reducer (2) for a pendulum structure (12) according to claim 4.
0a, b, 26a, b), the pendulum structure (12) according to claim 2 or 3.
In the dynamic vibration absorbers (20a, b, 26a, b) of the
b) is the mass (24a, b) facing the guide rails (22a, b, 28a, b)
Attached to the mass body (32) of the
2) is a magnetic material.

A dynamic vibration absorber (2) for a pendulum structure (12) according to claim 5.
0b, 26b), the pendulum structure according to any one of claims 2 to 4.
In the dynamic vibration absorber (20b, 26b) of (12), the guide rails (22b, 28b) further include a pair of side wall portions (42) extending on both sides of the side portion of the mass body (24b). Each side wall (42) has
The conductor (35) is provided on the side of the mass body (24b) facing the side portion, and the mass body (24b) is provided with magnets (38b) on both sides.

A dynamic vibration reducer (2) for a pendulum structure (12) according to claim 6.
0c, 26c), the dynamic vibration absorber of the pendulum structure (12) according to claim 1.
(20c, 26c), further, the mass body (24c), the wheels (34) rolling on the guide rails (22, 28), and the wheels (34) attached to both ends of the wheel (34) and. Axle that rotates integrally (5
0). The conductor (52) is attached to the axle (50) so as to rotate integrally with the axle (50), and the magnet (38c) is
They are attached to the mass body (32) of the mass body (24c) so as to face the conductor (52) in the axial direction of the axle (50) with a gap therebetween.

The dynamic vibration absorber (2) for the pendulum structure (12) according to claim 7.
0d, 26d), the dynamic vibration absorber of the pendulum structure (12) according to claim 1.
In (20d, 26d), further, the mass body (24d) is a wheel (34) rolling on the guide rails (22, 28), and a wheel (34) attached to both ends of the wheel (34). Axle that rotates integrally (5
0). The magnet (38d) is attached to the axle (50) so as to rotate integrally with the axle (50), and the conductor (54) is
It is attached to the mass body main body (32) of the mass body (24d) so as to face the magnet (38d) in the axial direction of the axle (50) with a gap therebetween.

A dynamic vibration reducer (2) for a pendulum structure (12) according to claim 8.
0e, 26e), the dynamic vibration absorber of the pendulum structure (12) according to claim 1.
In (20e, 26e), the guide rails (22e, 28e) are
Connect the plate-shaped ridge (58) extending in the moving direction of the mass body (24e) to the conductor (5
8) Prepared as The mass body (24e) protrudes from both ends of the magnet (38e) and the magnet (38e) and has a plate-shaped ridge at the tip.
It is equipped with a pair of yokes (60) facing each other with (58) in between.

[0014]

A dynamic vibration absorber (20, 2) for the pendulum structure (12) according to claim 1.
In 6), when the pendulum structure (12) rolls, the pendulum structure body (14, 16) and the mass body (24) are relatively displaced. This causes the mass (24) to oscillate along the guide rails (22, 28), with the eddy current braking means (35, 38a-e, 52, 54,5
The conductors (35, 52, 54, 58) and magnets (38a-e) of 8) move relative to each other. As a result, an eddy current is generated in the conductor (35,52,54,58), and due to the Joule loss in the conductor (35,52,54,58) due to this eddy current, the conductor (35,52,54,58) becomes Relative motion with the magnets (38a-e) is absorbed, and rolling of the pendulum structure (12) is reduced.
The Joule loss due to eddy current increases as the relative velocity between the guide rail (22, 28) and the mass body (24) increases, that is, when the pendulum structure body (14, 16) rolls significantly. To do.

A dynamic vibration reducer (2) for a pendulum structure (12) according to claim 2.
0a, b, 26a, b), the mass (24a, b) is guided by the guide rails (22a, b, 2).
8a, b) along with the guide rails (22a, b, 28)
Eddy current is generated in the conductor (35) of (a, b), and the Joule loss due to the eddy current causes mass (24a, b) and guide rail (22a, b, 28a, b).
Absorb relative movement between and.

A dynamic vibration reducer (2) for a pendulum structure (12) according to claim 3.
0a, b, 26a, b), in the guide rail (22a, b, 28a, b),
The magnetic body (36) on the non-opposite side of the mass body (24a, b) is a conductor (3
It acts as a yoke for constructing a magnetic circuit that generates magnetic lines of force across 5), and increases the electromagnetic force acting between the conductor (35) and the magnets (38a, b).

The dynamic vibration reducer (2) for the pendulum structure (12) according to claim 4.
0a, b, 26a, b), the mass body (32) made of magnetic material is
It acts as a yoke for constructing a magnetic circuit that generates magnetic field lines that cross the conductor (35), and increases the electromagnetic force that acts between the conductor (35) and the magnets (38a, 38b).

The dynamic vibration reducer (2) for the pendulum structure (12) according to claim 5.
0b, 26b), the mass (24b) for the guide rails (22b, 28b)
The eddy current caused by the relative motion of b) is generated symmetrically with respect to the moving direction of the mass body (24b), and the force in the direction perpendicular to the moving direction of the mass body (24b) is offset. Therefore, the mass body (24b) runs smoothly with respect to the rolling of the pendulum structure (12).

A dynamic vibration reducer (2) for a pendulum structure (12) according to claim 6.
0c, 26c), the wheels (34) of the mass body (24c) are guided by the guide rails (22,
Axle (50) rotates along with rolling 28)
Relative rotation occurs between the side conductor (52) and the mass body main body (32) side magnet (38c). As a result, an eddy current is generated in the conductor (52), a Joule loss is generated, the relative motion between the conductor (52) and the magnet (38c) is absorbed, and the pendulum structure main body (14, 16) is laterally moved. The shaking is braked.

A dynamic vibration absorber (2) for a pendulum structure (12) according to claim 7.
0d, 26d), the wheels (34) of the mass (24d) are guided by the guide rails (22,
Axle (50) rotates along with rolling 28)
Relative rotation occurs between the side magnet (38d) and the mass body main body (32) side conductor (54). As a result, an eddy current is generated in the conductor (52), a Joule loss is generated, and the relative motion between the conductor (52) and the magnet (38d) is absorbed, and the pendulum structure main body (14, 16) is laterally moved. The shaking is braked.

A dynamic vibration reducer (2) for a pendulum structure (12) according to claim 8.
0e, 26e), the magnetic circuit consists of a magnet (38e) and a pair of yokes (6
(2) with two plate-shaped ridges (58) in between.
Only in the small gap between the facing parts on the tip side of (60),
It is composed of materials other than magnetic materials. Therefore, the magnet (38e)
Most of the magnetic field lines resulting from the crossing of the plate-shaped ridges (58).
On the other hand, as the pendulum structure (12) rolls, the mass body (24e)
Moves relative to the guide rails (22e, 28e), and the magnetic field lines move along the plate-shaped ridges (58) while traversing the plate-shaped ridges (58), and eddy currents are generated. Produced in Article (58). The relative movement between the guide rails (22e, 28e) and the mass body (24e) is
Is absorbed by Joule loss due to eddy current in 8),
Be slowed down.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the accompanying drawings. FIG. 12 is a schematic view of the ropeway 10 equipped with the dynamic vibration reducer 20. The carrier 12 includes a box portion 14 for accommodating a person, and a suspension arm 16 fixed to the ropeway 18 and the roof portion of the box portion 14 at upper and lower ends, respectively. The dynamic vibration reducer 20 includes a guide rail 22 and a mass body 24 that is freely movable along the guide rail 22 while being prevented from falling off the guide rail 22. The guide rail 22 extends in the left-right direction of the carrying device 12, that is, in the rolling direction of the carrying device 12, in an arc shape, and is fixed to the suspension arm 16 at the central portion. As the carrier 12 receives a force from the lateral direction due to wind or the like, the box portion 14 and the suspension arm 16 swing about the ropeway 18, that is, roll, whereas the mass body 24 has a box shape. It vibrates at a vibration frequency different from that of the portion 14 and the suspension arm 16, and vibrates on the guide rail 22 relative to the guide rail 22.

FIG. 13 is a schematic view of a ropeway 10 equipped with another dynamic vibration reducer 26. In this dynamic vibration reducer 26, the guide rail 28 extends horizontally in the left-right direction of the carry device 12, that is, in the direction of horizontal rolling of the carry device 12, and is fixed to the suspension arm 16 at the center. The mass body 24 is movable along the guide rail 28 while being prevented from falling off from the guide rail 28. The coil spring 30 is arranged between both sides of the mass body 24 in the moving direction and both ends of the guide rail 28, and the mass body 24 is located at the center position of the guide rail 28, that is, the position where the guide rail 28 intersects the suspension arm 16. Trying to hold on. As the carrier 12 receives a force from the lateral direction due to wind or the like, the box portion 14 and the suspension arm 16 swing about the ropeway 18, that is, roll, whereas the mass body 24 has a box shape. It vibrates at a vibration frequency different from that of the portion 14 and the suspension arm 16, that is, a vibration frequency determined by the spring constant of the coil spring 30, the mass of the mass body 24, and the like, and vibrates on the guide rail 22 relative to the guide rail 22.

The dynamic vibration absorbers 20a-e and 26a-e will be described below as various concrete examples of the dynamic vibration absorbers 20 and 26. In the description of the dynamic vibration absorbers 20a-e and 26a-e, the components embodied corresponding to the components of FIGS. 12 and 13 are the same as the numbers used as the reference numerals of the components in FIGS. 12 and 13. , Indicate with a code accompanied by the corresponding alphabet. For example, the mass body 24 of FIG. 12 and FIG.
It is designated as mass 24a.

FIG. 1 shows a dynamic vibration reducer 20 as a first embodiment.
It is a detailed view of a and 26a. The mass body 24a is rotatably attached to the mass body main body 32 made of a soft magnetic material such as iron at the front, rear, left, and right parts of the moving direction of the mass body 24a below the mass body main body 32 to reduce the weight of the mass body 24a. 4 wheels to support 3
Equipped with 4. The lower surface of the magnet 38a is above the lower end of the wheel 34 and is fixed to the lower surface side of the mass body 32. Guide rail 22
Each of a and 28a has a two-layer structure including a conductor 35 layer on the upper surface side and a magnetic material layer 36 of a soft magnetic material on the lower surface side. The vibration of the mass body 24a on the guide rails 22a and 28a caused by the rolling of the carrier 12 generates an eddy current in the conductor 35, and the Joule loss due to the eddy current causes the mass body 24a and the guide rails 22a and 28a to move. The relative vibration between the mass body 24a and the guide rails 22a and 28a is suppressed, and as a result, the roll of the carrier 12 is suppressed.
The mass body 32 and the magnetic body 36 act as a yoke for forming a magnetic circuit that generates magnetic field lines that cross the conductor 35,
By increasing the magnetic flux density of the lines of magnetic force traversing the conductor 35, the electromagnetic force acting between the conductor 35 and the magnet 38a is increased, and the rolling suppression effect of the carrier 12 is enhanced.

FIG. 2 shows a dynamic vibration reducer 20 as a second embodiment.
It is the detailed view which looked at b and 26b from the upper part. Guide rails 22b, 2
8b is a side wall portion that stands up along both side edges of the bottom surface portion 40 in the width direction.
42, the side wall portion 42 has a layer of the conductor 35 on the inner side and a magnetic body 36 on the outer side similar to the bottom surface portion 40 of the guide rails 22a and 28a in FIG.
It is a two-layer structure with layers. The mass body 24b is the mass body 2 of FIG.
Similar to 4b, four wheels 34 are provided on the lower side of the mass body main body 32 to support the weight of the mass body 24b respectively on the front, rear, left and right in the moving direction of the mass body 24b. Wheels 44
The mass body 32 is rotatably attached to the front and rear of the left and right side portions of the mass body 32 about a straight line in the height direction, and rolls on the inner surface side of the side wall portion 42. The magnet 38b is fixed to both sides of the mass body 32 with a gap between the magnet 38b and the inner surface of the side wall 42. The mass 24b moves along the guide rails 22b, 28 along with the rolling of the carrier 12.
When oscillating on b, eddy current is generated in the conductor 35, and Joule loss due to the eddy current is generated in the mass body 24b and the guide rail 22.
The relative motion between b and 28b is absorbed, the relative vibration between the mass body 24b and the guide rails 22b and 28b is suppressed, and as a result, the rolling of the carrier 12 is suppressed. The mass body 32 and the magnetic body 36 act as a yoke for forming a magnetic circuit that generates magnetic field lines that cross the conductor 35, and increase the magnetic flux density of the magnetic field lines that cross the conductor 35, thereby forming the conductor 35 and the magnet 38b. The electromagnetic force that acts between the two is increased, and the rolling suppression effect of the carrier 12 is enhanced. Further, since the conductors 35 and the magnets 38b are provided on both the left and right sides with respect to the vibration direction of the mass body 24b, the lateral force acting on the mass body 24b is offset, and the vibration of the mass body 24b becomes smooth.

FIGS. 3 and 4 are views of the dynamic vibration reducers 20, 26 as a third embodiment as seen from the width direction and the extending direction of the guide rails 22, 28. The bracket 48 has its upper end fixed to front, rear, left and right parts of the lower surface of the mass body 32, and projects downward. The left and right ends of the axle 50 are rotatably supported by the lower end of the bracket 48, and the left and right wheels 34 are fixed near the bracket 48. A plurality of magnets 38,
Is penetrated through the axle 50 in a center hole having a diameter larger than the diameter of the axle 50, arranged at equal intervals in the axial direction of the axle 50 between the left and right wheels 34, and coupled to the lower surface of the mass body body 32 at the upper end portion. ing. The plurality of conductors 52, which is one less than the number of the magnets 38, are circular and have the same diameter as the magnets 38,
It is located between the magnets 38, 38 with a gap between them and fixed to the axle 50.

5 and 6 are views showing the magnetic pole arrangement on both surfaces of the magnet 38 of FIG. On each surface of the magnet 38, magnetic poles N and S are alternately arranged in the circumferential direction, and at the same position in the circumferential direction, the magnetic poles are opposite on both surfaces of the magnet 38.

In the dynamic vibration absorbers 20, 26, the mass body 24 is
As the carrier 12 rolls, the wheels vibrate on the guide rails 22 and 28 due to the rolling of the wheels 34, whereby the conductor 52 rotates relative to the magnet 38, and an eddy current is generated in the conductor 52. . magnet
The relative rotation of the conductor 38 and the conductor 52 is absorbed by the Joule loss caused by the eddy current, and the relative rotation speed is reduced. As a result, the rotation of the wheels 34 is suppressed, the lateral vibration of the guide rails 22, 28 is suppressed via the wheels 34, and the rolling of the carrier 12 is suppressed.

FIG. 7 shows a dynamic vibration reducer 20 as a fourth embodiment.
It is the figure which looked at d and 26d from the extension direction of guide rails 22 and 28. A view of the dynamic vibration reducers 20d and 26d viewed from the width direction of the guide rails 22 and 28 is the same as FIG. 3 in the case of the dynamic vibration reducers 20 and 26.
Explaining only the difference from the dynamic vibration absorbers 20, 26, the plurality of magnets 38d are fixed to the axle 50 in an array at equal intervals in the axial direction of the axle 50 between the left and right wheels 34. The plurality of conductors 54, which is one less than the number of the magnets 38d, are circular and have the same diameter as the magnets 38d.
It is located between 8d and 38d, penetrates the axle 50 in a central hole having a diameter larger than the diameter of the axle 50, and is coupled to the lower surface of the mass body 32 at the upper end.

8 and 9 are views showing the arrangement of magnetic poles on both surfaces of the magnet 38d shown in FIG. In the magnet 38d, similarly to the magnet 38 of FIGS. 5 and 6, the magnetic poles N and S are alternately arranged in the circumferential direction on each surface, and at positions equal in the circumferential direction,
The magnetic poles are opposite on both sides.

In the dynamic vibration absorbers 20d and 26d, the mass body 24d
The wheels on the guide rails 22 and 28 as the carrier 12 rolls.
It vibrates due to the rolling of 34, which causes the magnet 38d to
Relative to the conductor 54, an eddy current is generated in the conductor 54.
The relative rotation speed of the magnet 38d and the conductor 54 is reduced by the relative rotation absorbed by the Joule loss caused by the eddy current. As a result, the rotation of the wheels 34 is suppressed, the lateral vibration of the guide rails 22, 28 is suppressed via the wheels 34, and the rolling of the carrier 12 is suppressed.

FIGS. 10 and 11 are views of the dynamic vibration reducers 20e, 26e as the fifth embodiment as seen from the width direction and the extending direction of the guide rails 22e, 28e. The bracket 56 sandwiches each wheel 34 from both sides, the upper end is fixed to the lower surface of the mass body 32, and rotatably supports each wheel 34. The protruding wall 58 made of a conductive material projects at a predetermined height in the widthwise central portion of the bottom surface portion 40 and extends over the entire length of the guide rails 22e, 28e. The magnet 38e is fixed to the central portion of the lower surface of the mass body 32 in the left-right direction, and has N and S magnetic poles at its left and right ends. The pair of vertical movement control devices has a magnet 38 at the upper end.
It is fixed to the lower surface of the mass body main body 32 so as to hit e, and while maintaining a predetermined gap with the protruding wall 58 at the lower end,
The protruding wall 58 is sandwiched from both sides. This allows the protruding wall 58
Crosses the magnetic path formed by the magnet 38e and the vertical movement control device between the lower ends of the vertical movement control device.

In the dynamic vibration absorbers 20e and 26e, the mass body 24 is
As the carrier 12 rolls, vibration is generated on the guide rails 22 and 28 by rolling of the wheels 34 while maintaining the gap between the projecting wall 58 and the lower end of the vertical movement control device. The magnetic flux acting on the protruding wall 58 from the lower end of the dynamic control device moves along the protruding wall 58, and an eddy current is generated in the protruding wall 58. The Joule loss due to this eddy current absorbs the relative motion between the protruding wall 58 and the vertical motion control device, and the mass body with respect to the guide rails 22 and 28 is absorbed.
Suppresses the relative vibration of 24e. As a result, the guide rails 22, 2
The lateral vibration of 8 is suppressed, and the lateral vibration of the carrier 12 is suppressed.

In the dynamic vibration reducers 20e and 26e, a magnetic circuit is formed via the magnet 38e and the pair of yokes 60. Most of the magnetic circuit passes through the magnetic material and the two yokes 60 Only the small gap between the facing parts at the lower end passes through other than the magnetic material. As a result, the lines of magnetic force passing through the protruding wall 58 are significantly increased, and eddy currents are efficiently generated in the protruding wall 58.

The embodiment is a ropeway as a pendulum structure.
Although the carrier 12 of 10 has been described, the present invention is applicable as a dynamic vibration reducer of any pendulum structure such as a gondola lift, ski lift, etc. other than the carrier 12 of the ropeway 10.

[0037]

According to the first aspect of the present invention, since the relative motion between the mass body and the guide rail is suppressed by the eddy current braking force caused by the relative motion between the conductor and the magnet, a large rolling motion occurs. It is possible to secure a large suppression force for the mass, and the mass body can smoothly move relative to the guide rail even with a small amount of rolling to generate an appropriate eddy current braking force.

According to the second aspect of the present invention, since the conductor and the magnet for generating the eddy current braking force are mounted on the guide rail and the mass body, respectively, the structure of the eddy current braking means is simplified.

In the inventions of claims 3 and 4, since a yoke is added to increase the magnetic flux density of the magnetic field lines that cross the conductor,
The eddy current braking force can be increased.

According to the fifth aspect of the present invention, the forces acting on the mass body in a direction perpendicular to the direction of movement of the mass body are canceled out, so that the mass body moves smoothly with respect to the guide rails and the speed proportional braking characteristic is improved. Can be converted.

According to the sixth and seventh aspects of the invention, since the eddy current braking means is mounted on the mass body, the eddy current braking means can be downsized and the eddy current braking means can be easily manufactured.

According to the eighth aspect of the present invention, the magnetic circuit is made of a magnetic material such as a magnet and a yoke, except for the small gap where the plate-shaped ridges are arranged, so that the magnetic circuit passes through the plate-shaped ridges. The lines of magnetic force increase, and eddy currents are efficiently generated in the plate-shaped ridges as conductors.

[Brief description of drawings]

FIG. 1 is a detailed view of a dynamic vibration reducer as a first embodiment.

FIG. 2 is a detailed view of a dynamic vibration reducer as a second embodiment as viewed from above.

FIG. 3 is a view of a dynamic vibration reducer as a third embodiment as seen from the width direction of a guide rail.

FIG. 4 is a view of a dynamic vibration reducer as a third embodiment as viewed from the extending direction of the guide rails.

5 is a diagram showing a magnetic pole arrangement on one surface of the magnet of FIG. 4. FIG.

6 is a diagram showing a magnetic pole arrangement on the other surface of the magnet of FIG.

FIG. 7 is a view of a dynamic vibration reducer as a fourth embodiment as seen from the extending direction of the guide rails.

8 is a diagram showing a magnetic pole arrangement on one surface of the magnet of FIG. 7. FIG.

9 is a diagram showing a magnetic pole arrangement on the other surface of the magnet of FIG. 7. FIG.

FIG. 10 is a view of a dynamic vibration reducer as a fifth embodiment as seen from the width direction of a guide rail.

FIG. 11 is a view of a dynamic vibration reducer as a fifth embodiment as viewed from the extending direction of the guide rails.

FIG. 12 is a schematic view of a ropeway equipped with a dynamic vibration reducer.

FIG. 13 is a schematic view of a ropeway equipped with another dynamic vibration reducer.

[Explanation of symbols]

 12 Transporter 14 Box Part (Pendulum Structure Main Body) 16 Suspended Arm (Pendulum Structure Main Body) 20,26 Dynamic Vibration Absorber 22,28 Guide Rail 24 Mass Body 32 Mass Body Main Body 34 Wheel 35,52,54 Conductor (Eddy Current Brake) Means) 36 magnetic body 38a-e magnet (eddy current braking means) 42 side wall portion 50 axle 58 protruding wall (conductor, plate-shaped ridge) 60 yoke

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tomoji Kanaga 3-1, Okawa, Kanazawa-ku, Yokohama, Kanagawa Tokyu Vehicle Manufacturing Co., Ltd. Gaoka No. 1 13 Safety Cableway Co., Ltd. (72) Inventor Hiroshi Matsuhisa 1-22-27 Hieihei, Otsu City (72) Inventor Masashi Yasuda 10 Minami Hatsushima Town, Amagasaki City 133 Patent Equipment Stock Company

Claims (8)

[Claims] 1. A guide rail (22, 28) attached to (a) a pendulum structure body (14, 16) and extending in a swinging direction of said pendulum structure body (14, 16), (b) said guide rail ( 22,28)
And a conductor (35, 52, 54, 54, 54, 54, 54, which is movable relative to the guide rail (22, 28) and the mass body (24) relative to each other. 58) and a magnet (38a-e) and the conductor (35,52,54,58) and the magnet (38a-e) by the relative speed of the eddy current in the conductor (35,52,54,58) Eddy current braking means (35,38a-e, 52,54,58) for reducing the relative speed between the conductor (35,52,54,58) and the magnet (38a-e) by causing
A dynamic vibration absorber for a pendulum structure, comprising: 2. The guide rail (22a, b, 28a, b) is provided with the conductor (35) on the side facing the mass body (24a, b), the mass body (24a, b), The dynamic vibration absorber for a pendulum structure according to claim 1, wherein the magnet (38a, b) is provided on a side facing the guide rail (22a, b, 28a, b). 3. The guide rail (22a, b, 28a, b) is provided with a magnetic body (36) on the side opposite to the mass body (24a, b) with respect to the conductor (35). The dynamic vibration absorber for a pendulum structure according to claim 2. 4. The guide rails (22a)
a, b, 28a, b) facing the mass body (24a, b) mass body body
The dynamic vibration absorber for a pendulum structure according to claim 2 or 3, wherein the mass body main body (32) is attached to a portion (32) and the mass body main body (32) is a magnetic body. 5. The guide rails (22b, 28b) have a pair of side wall portions (42) extending on both sides of a side portion of the mass body (24b).
Each side wall portion (42) is provided with the conductor (35) on the side facing the side of the mass body (24b), the mass body (24b),
The dynamic vibration absorber for a pendulum structure according to any one of claims 2 to 4, wherein the magnets (38b) are provided on both sides. 6. The mass body (24c) is provided with the guide rail (2
2, 28) a wheel (34) rolling on the wheel, and an axle (50) attached to both ends of the wheel (34) to rotate integrally with the wheel (34), the conductor (52) Is attached to the axle (50) so as to rotate integrally with the axle (50), and the magnet (38c) is disposed between the conductor (52) in the axial direction of the axle (50). The mass body (24c) so as to face each other with a gap.
The dynamic vibration absorber for a pendulum structure according to claim 1, wherein the dynamic vibration absorber is attached to the mass body body (32). 7. The mass body (24d) includes the guide rail (2d).
2, 28) a wheel (34) rolling on, and an axle (50) attached to both ends of the wheel (34) to rotate integrally with the wheel (34), the magnet (38d) Is attached to the axle (50) so as to rotate integrally with the axle (50), and the conductor (54) is the magnet (38d) in the axial direction of the axle (50).
And the mass (24
The dynamic vibration absorber for a pendulum structure according to claim 1, wherein the dynamic vibration absorber is attached to the mass body body (32) of d). 8. The guide rail (22e, 28e) has a plate-shaped ridge (58) extending in the moving direction of the mass body (24e) and the conductor (5).
8), the mass body (24e) protrudes from both ends of the magnet (38e) and the magnet (38e) and faces each other with the plate-like ridge (58) sandwiched at the tip. One pair of yokes (6
The dynamic vibration absorber for a pendulum structure according to claim 1, characterized in that