JPH09229133A - Ropeway pillar vibration damping device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To damp the vibration of a cable pillar effectintly, by fixing a rail on the top of the ropeway pillar, and while providing mass applying bodies movable on the rail through springs, to vertical walls provided at both ends of the rail, furnishing a damper between the mass applying body and an adequate position of the rail. SOLUTION: When a cable pillar 1 of a ski lift device and the like is swayed by the passing of a conveyer and the like, the wheels 42 of a mass applying body 4 roll on a rail 2 against springs 5 and 5, so as to carry out a smooth horizontal movement. That is, when the pillar 1 is vibrated in the lateral direction, the body 4 is moved in the lateral direction. In this case, the relative movement of the body 4 and the pillar 1 is increased, but the energy is consumed according to the relative movement of the body 4. By resonating a vibration damping device A with the pillar 1 in such a way, the vibration energy of the pillar 1 is transferred to the damping device A, and the vibration energy is absorbed by a damper 3, so as to damp the vibration of the pillar 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cableway strut vibration damping device which is provided on a cableway strut of a ski lift device or the like to suppress vibration of the cableway strut.

[0002]

2. Description of the Related Art Hitherto, it has been known to use a damper as a vibration control device for a column-shaped structure such as a pillar of a bridge or a large pillar of a street lighting. For example, there is a structure in which two wire ropes are fastened to each other with looseness between the maximum amplitude generation point of the prop and the ground, and the middle portions of the two wire ropes are mutually connected by a damper. Yes (not shown). With this structure, the wire rope is also deformed when the column is shaken and deformed by wind or the like. At this time, the vertical and horizontal looseness applied to the wire rope also changes. As a result, the variable tension of the wire rope, that is, the damping effect due to the mysteriousness, and the damping action due to the damper with respect to the change in the horizontal direction act synergistically, and the strut is damped. Also,
As another vibration damping device, for example, a weight is attached to one end of the wire rope, the other end is fixed to the vibration suppression target, and a damper is attached between the middle part of the wire rope and the vibration suppression target. There is something (not shown). With this structure, when the vibration-damped object shakes due to wind or the like, the weight also shakes like a pendulum, so the damper absorbs this vibration energy.
It is possible to suppress the vibration of the vibration suppression target by matching the resonance frequency of the vibration suppression device with the vibration frequency of the vibration suppression target.

[0003]

Although the above-described conventional vibration damping device has a certain vibration damping effect, it does not require the installation of the wire rope on the column, but exhibits a pendulum action. It is necessary to attach the weight to the wire rope. By the way, in the ropeway support of the ski lift device,
The carrier passes near the pillar. Therefore, it is impossible to stretch the wire rope near the column for safety reasons. In particular, if the weight attached to the wire rope swings like a pendulum, it will be extremely dangerous for the traveling carrier.
Therefore, these vibration damping devices cannot be used to absorb the vibrations of the cableway struts. In addition, a rope connected to the rope is provided on the rope. When the carrier grip passes through this rope,
In addition to two-dimensional (horizontal) vibration, longitudinal vibration acts on the cableway column, and the cableway column vibrates greatly in the front, rear, left, and right directions. As a result,
There was a decrease in ride comfort and anxiety about the appearance. Therefore, the conventional vibration damping device having the combined structure of the wire rope, the weight, and the damper cannot achieve a sufficient vibration damping effect on the cableway strut under special environmental conditions.

The present invention solves the above-mentioned problems and is a compact cableway strut control which can safely and efficiently suppress the vibration of the cableway strut deployed in a special environment such as a ski lift device. The purpose is to provide a shaking device.

[0005]

In order to achieve this object, the cableway strut vibration damping device of the present invention has the following structure. The cableway strut vibration damping device is a rail that is fixed to the top of the cableway strut and has vertical wall portions that rise at both ends and a vertical wall portion of this rail that is mounted via springs to add a mass that can move on the rail. It is characterized by comprising a body and a damper arranged in a connecting manner between a mounting plate portion of the mass addition body and an appropriate position of the rail (a damper mounting plate portion formed on the rail).

In the cableway strut vibration damping device having such a structure, a mass addition body (shuttle) whose weight is adjusted according to the weight of the cableway strut, and a spring which supports this mass addition body,
It is composed of a damper that absorbs vibration energy.
In this vibration damping device, the natural vibration period of the cable-way strut is obtained in advance, and the spring constant is adjusted so that the natural period of the vibration-damping device resonates in the same manner as the cable-way strut. When the cableway column with the rail fixed to the top shakes due to wind or the like, the mass addition body resonates and shakes greatly. That is, it moves left and right on the rail against the spring. At this time, the relative movement between the mass addition body and the cableway strut becomes large, but the damper between the mass addition body and the rail (the cableway strut) consumes energy according to the relative movement between the strut and the mass addition body. To do. Thus, by making the vibration damping device resonate with the cableway strut, the vibration energy of the cableway strut is transferred to the vibration suppression device, and the vibration energy is absorbed by the damper to dampen the cableway strut.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the cableway strut damping device according to the present invention will be described below with reference to the drawings.

FIG. 1 is a front view of the cableway strut damping device, and FIG. 2 is a principle explanatory view. This cableway strut vibration damping device A is fixed to the top of the cableway strut 1 and has rails 2 which are provided with vertical wall portions 24 and 24a standing upright at both ends and springs 5 on the vertical wall portions 24 and 24a of the rail 2. Mass adder (shuttle) 4 that is movable via the rail 2
And the damper 3 disposed between the mounting plate portion 44 of the mass addition body 4 and the damper mounting plate portion 27 formed on the rail 2.

The vibration damping device A is attached to the cableway strut 1 as shown in FIG. The cableway strut 1 includes a concrete base 14 buried in the ground, a cylindrical strut body (vertical bar) 11 standing up from the base 14, and a horizontal bar (horizontal bar) continuously provided at the upper end of the strut body 11. ) 12 is formed into a "T" shape. A rope 16 is provided on the horizontal bar 12 of the cable strut 1, and a grip (grip) 17 of a carrier 18 is fixed to a cord 15 connected to the rope 16. In other words, the carrier 18 is the cableway column (vertical bar 11).
It is set so that it can smoothly pass through the vicinity of 1.

In the embodiment, as shown in FIG. 1, the rail 2 is made of "H-shaped steel" which is composed of a horizontal upper plate 21 continuous with an upper end of a vertical plate 22 which integrally stands up from the center of a horizontal lower plate 23. Has been done. Then, at both ends of the rail 2, the vertical wall portions 2 vertically rising from the horizontal upper plate 21 are provided.
4, 24a are erected. A damper mounting plate 27, which is between the horizontal upper plate 21 and the horizontal lower plate 23 and is parallel to the vertical plate 22, is welded and fixed to one end of the rail 2. The rail 2 is fixed to a horizontal bar (horizontal bar) 12 of the cableway strut 1. Specifically, the horizontal lower plate 23 of the rail 2 is fixed to the horizontal bar 12 with a U bolt 26.

The mass addition body (shuttle) 4 is composed of a horizontal base plate 41 having wheels 42 on its bottom surface, and a plurality of weight flat plates 43 mounted and fixed on the horizontal base plate 41 so as to be attachable / detachable. . The plurality of weight flat plates 43 are placed in a stacked form and screwed to the horizontal substrate 41. Further, at both ends of the horizontal substrate 41, cylindrical mounting portions 45, 45a for mounting one end of the spring 5 are provided.
Further, a mounting plate portion 44 for mounting the damper 3 is integrally hung on the side surface of the horizontal substrate 41. In addition, four guide rollers 46 are attached to the mounting plate portion 44 through an angle.
Is installed. The guide roller 46 holds the rail (horizontal upper plate) 2 and smoothes the lateral movement (linear movement) of the mass addition body 4. A plurality of weight flat plates 43 mounted and fixed on the horizontal substrate 41 of the mass addition body 4 are stacked in order to synchronize the mass of the mass addition body 4 with the natural frequency of the cableway strut 1. The weight flat plate 43 is, for example, a metal plate (iron plate),
Plates such as lead plates and concrete plates are used.

As the spring 5, a coil spring is used in the embodiment. One end of the coil spring 5 (5) is fixed to the cylindrical mounting portion 45 (45 a) of the mass adding body 4, and the other end is fixed to the vertical wall portion 24 (24 a) of the rail 2. The mass addition body (shuttle) 4 is supported by springs 5 (5) in a state where the wheels 42 are placed on the upper surface of the rail (horizontal upper plate 21) 2. This spring 5 is detachable so that the spring constant can be changed in order to adjust the vibration cycle of the vibration damping device A (in order to resonate the natural period of the vibration damping device A with the natural period of the cableway strut 1). It is installed. That is, the mass addition body 4 moves on the rail 2, but its frequency is adjusted by the mass of the mass addition body 4 and the spring constant of the spring 5 supporting the mass addition body 4.

As shown in FIG. 2, the damper 3 comprises a cylinder 31, a piston rod 32, and fastening members (joint portions) 33, 33a provided at the rod front end and the cylinder rear end, respectively. Stuff used. This damper 3 has rails 2 as shown in FIG.
The horizontal upper plate 21 and the horizontal lower plate 23 are arranged in the recessed space. The fastening member 33 at the rear end of the cylinder 31 is the rail 2
Damper mounting plate portion 27 located under the vertical wall portion 24 of the
The fastening member 33a at the tip of the rod 32 is fastened to the mounting plate 44 of the mass adding body 4.

Further, as shown in FIG. 1, this vibration damping device A has a protective case 6 having a bottom opening and a bottom, which is fitted onto the rail 2, the mass adding member 4 and the damper 3 so as to cover all of them. The case body 6 surrounds the entire upper peripheral surface of the vibration damping device A and protects it from wind and snow.

In the cableway strut vibration damping device having such a structure, the mass addition body 4 for adjusting the weight according to the weight of the cableway strut 1, the spring 5 for supporting the mass addition body 4, and the vibration energy. It consists of a damper 3 that absorbs. In this vibration damping device A, the natural period of the cableway strut 1 is obtained in advance,
The constant of the spring 5 and the mass of the mass addition body 4 are adjusted so that the natural period of the vibration damping device A resonates in the same manner as the cableway strut 1. When the cableway strut 1 sways due to wind or passage of a carrier, the mass addition body 4 resonates and shakes greatly. That is, the mass addition body 4 moves left and right on the rail 2 against the springs 5 and 5. The mass addition body 4 performs smooth horizontal movement as the wheels 42 roll on the rails 2. As shown by the arrow in FIG. 2, when the cableway strut 1 vibrates in the left-right direction, the shuttle 4
Moves in the left-right direction (vibration absorption direction). At this time, the relative movement between the mass addition body 4 and the cableway strut 1 becomes large,
The damper 3 between the mass addition body 4 and the rail 2 consumes energy in accordance with the relative movement of the cableway strut 1 and the mass addition body 4. Thus, by making the vibration damping device A resonate with the cableway strut 1, the vibration energy of the cableway strut 1 is transferred to the vibration suppression device (shuttle 4) A, and the vibration energy is absorbed by the damper 3, whereby the vibration energy of the cableway strut 1 is reduced. Vibration can be controlled.

FIG. 4 is an explanatory perspective view showing another embodiment according to the present invention. In the previous embodiment, the state in which the vibration damping device A is attached to the horizontal bar (horizontal bar) 12 is shown, but in this embodiment, in addition to this vibration damping device A, the upper and lower ends of the horizontal bar 12 are An example in which the vibration damping devices A and A orthogonal to the vibration damping device A are arranged is shown. In this case, it is possible to suppress not only the vibration (sway) of the column main body 11 in the front-rear direction but also the vibration (sway) in the left-right direction.

[0017]

As described above, according to the present invention, the rail is fixed to the top of the cableway strut, and the vertical wall of the rail is provided with the mass addition body movable on the rail via the spring to add the mass. Since it was decided to install a damper between the body mounting plate part and the rail damper mounting plate part, the vibration energy of the cableway strut is transferred to the vibration damping device by making this damping device resonate with the cableway strut. By absorbing the vibration energy with the damper, the vibration of the cableway strut can be suppressed. Therefore, since the vibration of the cableway column under the special environment where the carrier passes in the vicinity can be effectively achieved, the column is less swayed, and the appearance anxiety can be eliminated. Further, unlike the conventional case, it is not necessary to carry out a large-scale work for attaching a wire or a weight to the cableway strut, and it is possible to achieve a vibration damping effect safely without causing a danger to a transporter which runs near the cableway strut.
Furthermore, a rail is integrally fixed to the top of the cableway support column under a very special environment where the transporter operates, the wheels of the shuttle smoothly move horizontally on this rail, and the damper absorbs the vibration energy. Therefore, it has an excellent effect of achieving the object of the invention, such as providing a compact and highly accurate rational vibration damping device.

[Brief description of drawings]

FIG. 1 is a front view showing a cableway strut vibration damping device.

FIG. 2 is a principle explanatory view for explaining the principle of a cableway strut vibration damping device.

FIG. 3 is a perspective view showing a state in which the cableway strut vibration damping device is attached to the cableway strut.

FIG. 4 is a perspective view showing another embodiment of the attached state of the cableway strut damping device.

[Explanation of symbols]

 1 Cableway support 2 Rail 3 Damper 4 Mass addition body 5 Spring 24 Vertical wall part 44 Mounting plate part

Claims (2)

[Claims] 1. A rail fixed to the top of a cableway strut and provided with vertical wall portions standing up at both ends, and a mass addition member provided on the vertical wall portion of the rail via a spring and movable on the rail. , A cableway strut vibration damping device comprising a damper arranged in a connecting state between a mounting plate portion of the mass addition body and an appropriate position of the rail. 2. The cableway strut vibration damping device according to claim 1, wherein a wheel that moves on the upper surface of the rail is provided on the bottom surface of the base of the mass addition body.