JPS6279196A - Crane - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a container crane and an unloader.

This article relates to vibration isolation for cranes in general, including loaders and the like.

[Problem that the invention seeks to solve]

Conventional cranes often generate vibrations when the trolley travels or when hoisting and unloading loads, causing problems in terms of fatigue strength of the crane body, as well as problems in the operator's comfort and operability.

[Means for solving problems]

The crane according to the present invention is aimed at solving the above-mentioned mesenteric point, and uses a crane girder to provide relative vibration that absorbs the vibrations of the crane body. It is characterized by a structure in which it is attached so that it can be moved.

[For production]

In other words, if the crane body tries to vibrate due to the running of the trolley or the hoisting and unwinding of loads.

The machine room, which is installed so that it vibrates at the same frequency as the crane body, resonates with the crane body and causes rocking, and the vibration energy is absorbed by the rocking of the machine room, reducing or preventing the vibration of the crane body. be done.

〔Effect of the invention〕

This improves the comfort and operability of the crane driver, solves the problem of fatigue strength of the crane body, and makes it possible to rationalize and economize the structure.

〔Example〕

The present invention will be explained based on examples. FIG. 1(a) is a front view of a crane according to an embodiment of the present invention, and (C:I
) is a detailed diagram of the machine room. In the figure, a machine room 2 is mounted on a crane girder 1, and a machine room 2 is equipped with drive system equipment such as motors, deceleration devices, and drums for heavy objects (not shown), and an operation room. It is supported on the crane girder 1 by wheels 3 via 4 and a vertical oil damper 5. still.

Horizontally, the machine room 2 is connected by a horizontal spring 6 and a horizontal oil damper 7 to a support 8 fixed to the crane girder 1.

This configuration allows the machine room 2 to swing vertically and horizontally relative to the crane girder 1. However, a shock absorber 10 made of rubber attached to the stopper support member 9 prevents excessive vibration from occurring in the horizontal direction.

When the crane tries to vibrate up and down due to hoisting and unloading of a load, the machine room 9 starts to oscillate in the up and down direction because it is supported by the upper and lower springs 4 and the upper and lower dampers 5. Since the vibration energy of the crane is absorbed by the vibration of the machine room 2, the vibration of the crane body does not increase and is suppressed to a minute amplitude. However, when the crane tries to vibrate horizontally due to horizontal movement of a load, the machine room 2 starts to vibrate horizontally due to the horizontal splash 6 and the horizontal damper 7.
This oscillation absorbs the vibration energy of the crane and suppresses the vibration of the crane body.

FIG. 2 is a front view of a machine room of a crane according to a second embodiment of the present invention. In FIG. 1, the machine room 2 is suspended from a machine room support tower 11 using a machine room hanging rod 12. This allows it to swing horizontally. in this case.

Although vibrations in the vertical direction cannot be prevented, the same functions and effects as in the above embodiments can be achieved with respect to vibrations in the horizontal direction.

FIG. 3 is a front view of a machine room of a crane according to a third embodiment of the present invention, and in FIG.
1 is directly supported using a machine room support rod 13, and the operation and effect of 9 are the same as in the second embodiment.

[Brief explanation of drawings]

FIG. 1 is a front view of a crane according to an embodiment of the present invention, FIG. 2 is a front view of a machine room of a crane according to a second embodiment of the present invention, and FIG. 3 is a front view of a crane according to a third embodiment of the present invention. It is a front view of the machine room of the crane concerned. 1... Crane girder-92... Machine room, 3...
Wheel, 4...Vertical spring, 5...Vertical oil damper, 6...Horizontal spring, 7...Horizontal oil damper, 8... Support material. d (b)

Claims (1)

[Claims] A crane characterized in that a machine room comprising a crane operation room and drive system equipment is mounted on a crane girder so as to be capable of relative rocking to absorb vibrations of the crane body.