JPH07167207A - Swing prevention device - Google Patents

Abstract

PURPOSE:To prevent the swing of a box body like a cage, etc., by arranging a speed increasing machine for increasing a turning movement speed by connecting a horizontal hanging down shaft to an input shaft and a power generator whose shaft is connected to the output shaft of this speed increasing machine. CONSTITUTION:The end of a cage shaft 10 (horizontally hanging down shaft) is connected to the input shaft 12a of a gear speed increasing machine 12 and its output shaft 12b is connected to the shaft of the direct current generator 13 of an electro-magnetic damper assembly. An electro-magnetic damper assembly installed on the open end side of a housing 11 is composed of the speed increasing machine 12 with multiple steps planet gears and the direct current generator 13. Thus, when the cage shaft 10 is going to make turning movement, the armature of the direct current generator 13 is rotated by the speed increasing machine 12 and a brake torque, which is a reverse rotation torque, is generated on the armature side and a brake for vibration is applied. Thereby, the swing of a box body like the cage, etc., can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for preventing rocking of a chassis suspended from a movable strip such as a cage of a vertical circulation type mechanical multi-storey parking lot.

[0002]

2. Description of the Related Art FIG. 2 is an outline of the structure of a vertical circulation type mechanical multistory parking lot. In this type of multi-storey parking lot, a chain 3 is suspended between sprockets 1 and 2 arranged at an upper portion and a lower portion, and a cage 5 is rotatably suspended on an arm 4 attached to the chain 3 at regular intervals. It has a structure for lowering it, and the upper sprocket 1 can be rotationally driven by an electric motor (not shown) to circulate the chain 3, and if the car is stored in the cage 5 and sequentially circulated vertically, the car You can park anywhere. In the figure, 6 is a turntable, 7 is a control panel, and 8 is a building steel frame.

In such a structure, the chain 3 and the arm 4
Focusing on the connecting portion between the cage 5 and the cage 5, two arms 4 project from the chain 3 as shown in FIG. 3, and a bearing 9 is present at the tip of this arm 4. The bearing 9 rotatably supports the shaft 10 of the cage and is a horizontal cage suspension shaft.
Therefore, the cage 5 (see FIG. 2) can rotate about the shaft 10.

In the structure described above, when attention is paid to the sway of the cage 5, the chain 3 and the arm 4 suspending the cage 5 ascend, and the arm 4 moves from the moment the chain 3 meshes with the groove of the upper sprocket 1. Is sprocket 1
A circular motion centered on the axis of is started. At this time, cage 5
Tries to maintain the posture up to now by its inertial force, but the cage 5 swings due to the rotational force generated by the rotational movement of the bearing 9.

FIG. 4 illustrates this swinging motion. The vertical axis represents the angle φ between the vertical line and the center axis of the cage 5, and the horizontal axis represents the angle θ of the arm 4 from the horizontal direction. Is shown for half a revolution from 0 ° to 180 °. As can be seen from this figure, there are three maximum points of shaking, especially when θ is 1
It can be seen that φ slightly swings to the side opposite to the rotating direction just before 80 ° (point A). Since this swing is in the direction in which the cage jumps out from the center, a cage guide (not shown) is provided on the steel frame 5 to prevent it. FIG. 5 is a record of shock vibrations when the cage 5 collides with the acceleration pickup attached to the cage guide. When this shock vibration is transmitted to the steel frame 8, it causes low-frequency air vibration radiated from the exterior plate, and causes vibration and noise in the living room in a multi-storey parking lot built into a building.

[0006]

Various measures have been attempted in the past in order to prevent the cage from colliding with the cage guide. However, the following problems appear, and the fundamental problems of vibration and noise occur. It is not a countermeasure. (I) If the positions of the steel frame and the cage guide are provided outside the swing limit, the impact force does not act, but it requires a large space and is not economical. (Ii) It is effective to provide a damper in order to reduce the swing angle, but it is mechanically impossible to provide it between the shaft and the bearing that relatively rotate 360 °. (iii) Since the relative rotation speed is low, a large damping coefficient is required to generate the required braking torque. (Iv) There is a risk of oil leakage with viscous dampers that use oil.

In view of the above problems, it is an object of the present invention to provide an anti-swing device that reduces the swing angle of a cage by using an electromagnetic damper and, in turn, prevents the cage body such as a cage from swinging.

[0008]

According to the present invention for achieving the above object, an arm is fixed to a movable strip, and a horizontal suspending shaft is rotatably attached to the arm, and a case is mounted on the horizontal suspending shaft. In a moving object in which is suspended and fixed, a speed increaser in which the horizontal suspension shaft and the input shaft are connected to increase the speed of rotation, and a DC generator in which a shaft is connected to the output shaft of the speed increaser , Are included.

[0009]

[Operation] In order to obtain the required braking force, the swing angle of the housing is reduced by the action of the rotary damper connected to the horizontal suspension shaft, and the relative speed between the bearing and the rotary shaft is increased by the speed increasing gear device. The torque generated by the rotary damper can be reduced, and thus the rotary damper is reduced.

[0010]

EXAMPLE An example of the present invention will now be described with reference to FIG. FIG. 1 shows a tip structure of an arm 4 fixed to a chain in a multi-storey parking lot. That is, the housing 11 is attached to the tip of the arm 4. The housing 11 is a bearing of the shaft 10 of the cage, and a gear speed increaser 12 of an electromagnetic damper assembly described later.
I also act as a gear box. In other words, the end of the cage shaft 10 is connected to the input shaft 12a of the gearbox 12.
The output shaft 12b is connected to the shaft of the DC generator 13 of the electromagnetic damper assembly. Housing 11
The electromagnetic damper assembly attached to the open end side of is composed of a multistage planetary gearbox 12 and a DC generator 13. In this way, when the cage shaft 11 is about to rotate, the gearbox 12 rotates the armature of the DC generator 13, so that braking torque, which is reverse rotation torque, is generated on the armature side, and there is a system against shake. Can be hung.

Here, the reverse rotation torque T ₀ acting on the armature of the DC generator 13 is expressed by the following equation [Equation 1].

[Equation 1] Further, the torque (rotational shaft torque of the cage) T of the input shaft 12a of the speed increaser 12 is calculated by the following equation [Equation 2] when the transmission efficiency is ignored.
become that way.

[Equation 2] Therefore, as the braking torque of the cage shaft, 2
A value proportional to the square is obtained, and if the braking torque is constant, the DC generator can be made smaller in inverse proportion to the square of the speed increasing ratio. Further, the braking torque can be easily adjusted by adjusting the resistance of the armature circuit. FIG. 6 shows the relationship between the damping coefficient of the damper (standard of angular velocity of cage) and the swing angular velocity of cage. By properly selecting the damping coefficient, it is possible to reduce the fluctuation as desired.

Although the above description has been given with reference to the embodiment of a multi-storey parking lot, applications such as a ski lift gondola or a ropeway gondola are conceivable in order to prevent the shaking of a moving object.

[0013]

As described above, according to the present invention, the swaying of the housing increases the speed and the armature rotates to generate a braking force which is a reverse rotational torque, and the swaying angle and the swaying speed can be reduced. ,
In multi-storey car parks, the problems of low frequency air vibration, noise and vibration due to cage collision can be solved. Further, the speed increasing gear device increases the relative speed between the rotary shaft and the bearing, and reduces the rotary damper. Further, the use of an electromagnetic damper as the rotary damper has the following effects. 1) There is no worry of oil leakage. 2) No change in characteristics due to outside air temperature. 3) The damper for obtaining the required braking force is easy to design and easy to adjust.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a rocking prevention device according to an embodiment of the present invention.

FIG. 2 is a schematic diagram of a vertical circulation type mechanical multi-storey car park.

FIG. 3 is a configuration diagram of a chain, an arm, and a bearing.

FIG. 4 is a graph showing swing of a cage.

FIG. 5 is a diagram showing an example of vibration measurement.

FIG. 6 is a diagram showing an effect of a rocking prevention device.

[Explanation of symbols]

 1 Upper sprocket 2 Lower sprocket 3 Chain 4 Arm 5 Cage 9 Bearing 10 Shaft 11 Housing 12 Speed-up gear device 12a Input shaft 12b Output shaft 13 DC generator

Claims (1)

[Claims] 1. A moving object in which an arm is fixed to a moving strip, a horizontal suspension shaft is rotatably attached to the arm, and a housing is suspended and fixed to the horizontal suspension shaft. A rocking preventive device comprising: a speed increaser, which is connected to a shaft and an input shaft to accelerate rotation, and a DC generator, which has a shaft connected to an output shaft of the speed increaser.