JPH0738747Y2 - Vibration control device when traveling device is stopped - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a vibration damping device when a stacker crane is stopped.

[Conventional technology]

There is no example of mounting this type of damping device on a stacker crane. Conventionally, braking is forcibly applied by a brake that has a complicated circuit.

[Problems to be solved by the device]

When the traveling device having a flexible structure such as a stacker crane is stopped, the upper end of the traveling device may shake greatly as shown in FIG. Forks cannot be taken in and out until the shaking stops, so it is necessary to reduce the shaking and stop it in a short time in order to improve the operating efficiency of the crane.

Conventionally, a brake is also provided on the upper end to forcibly brake, but the crane body may be overloaded because the stop positions of the upper and lower ends are misaligned. Therefore, when to apply the brake and release it It is necessary to control the timing of the operation, and the device has a complicated control circuit.

An object of the present invention is to provide a vibration damping device that is easy to control.

[Means for Solving the Problems]

A disk-type viscous damper formed by inserting and supporting a roller shaft with a plurality of disks fixed in a housing that encloses oil,
A roller, which is arranged slidably up and down through a spring in an enclosure having an electromagnet on an upper wall surface, and which is provided on the roller shaft and projects outside the enclosure, is attached to a fixed structure. It is characterized in that it is fixed to the upper part of the flexible structure traveling device so as to be able to come into contact with and separate from the guide rail.

[Action]

Vibration of the crane body is absorbed by the oil damper and attenuated. By converting the direct motion of the vibration into the rotary motion, the device can be downsized.

〔Example〕

In FIGS. 1 and 2, reference numeral 1 is a housing of the vibration damping device, which is fixed to the upper part of the crane body. Reference numeral 2 denotes a disk-type viscous damper, which is a housing arranged in the housing 1 so as to be vertically slidable.
2a, a roller shaft 2b rotatably supported by the housing 2a,
It is composed of a disc 2c fixed to the roller shaft 2b, oil 2d sealed in the housing 2a, and the like. 3 is a roller fixed to the roller shaft 2b, 4 is an electromagnet mounted in the upper part of the housing 1, 5 is a spring mounted between the housing 1 and the housing 2a, and 6 is a guide mounted on the ceiling It is a rail.

When the crane is traveling, by keeping the electromagnet 4 in the off state, the roller 3 and the guide rail 6 are separated from each other as shown in FIG. 2 (a), and this device has no influence on the traveling performance.

Next, when the crane is stopped, that is, when the brake is applied and the electromagnet 4 is turned on, the roller 3 moves up, the guide rail 6 and the roller 3 come into contact with each other as shown in FIG. 2B, and the roller 3 starts rotating. As a result, the disk-type viscous damper 2 that is interlocked with the roller shaft 2b operates to generate a damping effect and suppress the vibration amplitude.

If the upper and lower ends of the crane are misaligned, the roller 3 is rotated and, while being damped, automatically returns to a position where there is no misalignment.

When the vibration of the upper end after the crane is stopped is compared between the case where this damping device is installed and the case where this damping device is not installed, it is as shown in Fig. 3, and it can be seen that the damping effect of this device is great.

[Effect of device]

As described above, according to the present invention, the disc type viscous damper 2 formed by inserting and supporting the roller shaft 2b having the plurality of discs 2c fixed in the housing 2a for enclosing oil, and the electromagnet 4 on the upper wall surface. A roller 3 which is arranged so as to be slidable up and down through a spring 5 in a housing 1 having the housing 1 and which is provided on the roller shaft 2b and projects out of the housing 1 serves as a fixed structure. Since the flexible structure traveling device is fixed to the upper portion of the flexible structure traveling device so as to be capable of coming into contact with and separated from the attached guide rail 6, in the flexible structure traveling device, the disc type viscous damper rises due to the excitation of the electromagnet, Since the roller provided on the roller shaft of the contact roller comes into contact with the guide rail to provide damping by vibrating the disk-type viscous damper, the vibration during the stop of the flexible structure traveling device is reduced and the stop time is shortened. Roller separates from guide rail Release of the dynamic has the effect of such can be easily controlled release timing of the braking to be done by the clutch action of the electromagnet.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, (a) is a side sectional view,
(B) is an AA sectional view of (a). FIG. 2 is an operation diagram of the apparatus shown in FIG. 1, in which (a) shows running and (b) shows braking operation. FIG. 3 is a graph showing the swing of the upper end after the crane is stopped, and FIG. 4 is an explanatory diagram showing the swing of the crane body when the crane is stopped. DESCRIPTION OF SYMBOLS 1 ... Housing, 2 ... Disc type viscous damper 2b ... Roller shaft, 3 ... Roller 4 ... Electromagnet

Claims (1)

[Scope of utility model registration request] 1. A disc-type viscous damper formed by inserting and supporting a roller shaft having a plurality of discs fixedly mounted in a housing for enclosing oil, and a disc viscous damper having an electromagnet on an upper wall surface thereof, which is vertically moved through a spring. And a flexible structure so that a roller provided on the roller shaft and projecting to the outside of the housing can slidably correspond to a guide rail attached to a fixed structure. A vibration damping device when the traveling device is stopped, which is fixed to the upper part of the traveling device.