JPS6127315B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a crane used for indoor and outdoor cargo handling, and more particularly to a crane equipped with an air levitation device.

Conventionally, as a cargo handling device equipped with an air flotation device, for example, Japanese Patent Publication No. 48-24868 and Japanese Patent Application Laid-open No. 1973-
There is No. 109655. This type of cargo handling equipment suspends a heavy object using a portal assembly structure, lifts the heavy object slightly above the ground using a flotation device installed on the portal assembly structure, and then lifts the heavy object slightly above the ground. The heavy object is transported to a desired position by the propulsive force applied by the vehicle. This cargo handling equipment can move over a wide range of transportation sites, but there are other types of cargo handling equipment such as overhead cranes and gantry cranes that have a travel path set in a fixed direction. Japanese Patent Application Laid-Open No. 50-24966 as a drive system equipped with an air levitation device for this type of crane.
As shown in the No. 1, a drive system in which an air pad is installed at one lower end of the crane and a drive wheel that rolls on a traveling rail at the other end of the crane, and
As shown in No. 51-147871, there is a drive system in which an air pad is installed at the lower end of the crane and a linear motor is installed at the upper end of the crane.

In the former case, since the drive wheels are rolled on the running rail, running noise is generated, which poses a noise problem.
In addition, since the vertical column at one end of the crane is configured to be able to move over a relatively wide range of transport ground using air pads, the wide range of transport ground facing the air pads must be prepared into a flat surface with high precision. There are some drawbacks. The latter also has an air pad at the bottom of the crane, so
The problem of running noise as in the former does not occur. However, since the latter type is installed between warehouse shelves of warehouse equipment, its versatility in cargo handling is limited.

The present invention has been made based on the above-mentioned matters, and has a cargo handling versatility such as an overhead crane that is equipped with a traveling moving part that moves along a fixed traveling route and a traversing moving part installed on this traveling moving part. The purpose of the present invention is to provide a crane with a new drive system for high-speed cranes.

The present invention is characterized in that a crane includes a traveling moving part that moves along a fixed traveling route and a traversing moving part movably installed on the traveling moving part, at an end of the traveling moving part. A floating guide horizontal plane facing the lower surface of the end of the moving part and a vertical movement guiding plane facing the end surface of the moving part, respectively, are provided on the fixed traveling path facing the part and the traveling moving part facing the end of the traversing part. an air flotation device and a braking device are provided on the lower surface of the end of each of the moving parts, facing the floating guide horizontal surface; and a guiding drive device is provided on the end surface of each moving part, facing the moving guide vertical surface. The guide drive device includes a rubber tire type drive wheel, a spring that presses the drive wheel against a vertical surface, and a cylinder that retracts the drive wheel against the spring force of the spring. It consists of a magnetic generator that generates an electromagnetic braking force between it and the horizontal guiding surface, and a spring that holds it.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows an overhead crane as an example of a crane according to the present invention. In the figure, 1 is a girder constituting the traveling moving part of the crane, 2 is a trolley constituting the traversing moving part of the crane, 3 is a hook,
4 indicates a hanging rope, and 5 indicates a hoisting device. 6 is a side wall formed inside the building, and this side wall 6 has a girder 1.
A horizontal floating guide surface 6a and a vertical movement guide surface 6b are formed along the travel route. In this example, the floating guide surface 6a is composed of a structure integrated with the side wall 6 and a steel plate attached to it, but if a simpler structure is desired, a flat surface such as an I-shaped cable can be used as is. do it. Said girder 1
As shown in FIGS. 2 to 4, a plurality of flotation devices 7 and a braking means 8 located between these flotation devices 7 are provided in a portion facing the flotation guide surface 6a. Further, a guide drive device 9 is provided in a portion of the girder 1 facing the movement guide surface 6b, as shown in FIGS. 2-4.

As shown in FIG. 5, the flotation device 7 includes a support portion 7a for supporting a load when stationary, a skirt attachment portion 7b, a skirt portion 7c, and an air supply hose 7d to the skirt portion 7c. The air supply hose 7d
is connected to a pressure air supply source installed in the building or on the girder 1. This flotation device 7 is configured to slightly levitate the girder 1 above the flotation guide surface 6a by means of pressurized air supplied to its skirt portion 7c.

As shown in FIG. 5, the braking means 8 includes a brake mounting base 8a, a spring support portion 8b, and a brake body 8.
It consists of c. The brake body 8c is normally suspended by a spring support 8b so as not to contact the floating guide surface 6a, and when a brake current is applied, an electromagnetic braking force is generated between the brake body 8c and the floating guide surface 6a made of iron. It is composed of

The guide drive device 9 performs both the steering and driving functions of the girder 1, and as shown in FIG. 6, when moving, it is pressed against the moving guide surface 6b by a spring 9a, and when not moving, the girder is pushed by a cylinder 9b. For example, two rubber tire drive wheels 9c are provided which can be retracted inward. The one drive wheel 9c is composed of a drive motor 9d, a main pulley 9e attached to it, a tire pulley 9f, and these pulleys 9.
It is driven by a configuration with a belt 9g that is stretched around e and 9f. The other driving wheel 9c is configured with an intermediate pulley 9h, a tire pulley 9i, a belt 9j that is stretched over the pulleys 9h and 9e, and a belt 9k that is stretched around the pulleys 9h and 9i, so that the other driving wheel 9c is rotated in the same direction as the one driving wheel 9c. be rotated. Also, the drive motor 9d
A clutch 9l is provided on the output shaft of the motor.

In the trolley running path section on the girder 1, there is a seventh
As shown in FIG. 8, a horizontal floating guide surface 10a
and a movement guide surface 10b perpendicular thereto. A plurality of floating devices 11 and braking means 12 are provided in a portion of the trolley 2 facing the floating guide surface 10a. In addition, the movement guide surface 10 of the trolley 2
A guide drive device 13 is provided in a portion facing b. The flotation device 11, the braking means 12, and the guide drive device 13 have the same structure as that provided in the girder 1, so detailed explanation thereof will be omitted.

Electric power is supplied to each electrical device of the girder 1 and the trolley 2 through an electric wire 1 attached to the side wall 6 as shown in FIG.
4 and a slider 15 attached to the girder 1 so as to be in contact with the electric wire 14.

Next, the operation of one example of the above-mentioned crane of the present invention will be explained.

When the crane is stopped, pressure air is not supplied to the flotation device 7 of the girder 1 and the flotation device 12 of the trolley 2. Therefore, the end of the girder 1 comes into contact with the floating guide surface 6a of the side wall 6, and the trolley 2 also comes into contact with the floating guide surface 10a on the girder 1 and stops. Furthermore, the drive wheels 9c of each guide drive device 9, 13 are connected to the cylinder 9.
Due to the contraction of b, it is retracted inward of the girder 1 and trolley 2 against the spring 9a.

In the above-mentioned state, when operating the crane, pressurized air is first supplied to the flotation device 7 of the girder 1 and the flotation device 12 of the trolley 2. As a result, an air film is formed between the flotation device 7 of the girder 1 and the flotation guide surface 6a facing it, and between the flotation device 12 of the trolley 2 and the flotation guide surface 10a facing it, so that the girder 1 and trolley 2 are levitated. Thereafter, each drive wheel of the guide drive device 9 of the girder 1 and the guide drive device 13 of the trolley 2 is brought into contact with the respective movement guide surfaces 6b, 10b.
By driving each of the guide drive devices 9 and 13, the girder 1 and the trolley 2 can be made to run or traverse along their respective travel routes. Furthermore, movement control of the girder 1 and the trolley 2 is achieved by adjusting the drive motors of the guide drive devices 9 and 13.

Next, when stopping the girder 1 and the trolley 2, the driving of the drive motor of each guide drive device 9, 13 is stopped, and the electromagnetic braking force is applied by each braking means 8, 12. And the trolley 2 can be stopped at a desired position. Also, when slightly moving girder 1 or trolley 2,
While each flotation device 7, 12 is in a working state, the clutch 9l of the guide drive device 9, 13 disconnects the main pulley 9e and the drive motor 9d. In this state, if the operator under the crane moves the 3 parts of the lever holding the 3 parts of the hook in the desired direction, girder 1 and trolley 2 are levitated, so the girder 1 and trolley 2 will be moved by a slight propulsion force. Trolley 2
can be slightly moved.

Further, the above-mentioned fine movement operation is performed by the guide drive devices 9 and 13.
This is also possible through fine adjustment.

In addition, in the above-mentioned example, the braking means was provided between the plurality of flotation devices, but it may be provided between the guide drive devices. Furthermore, although the above-mentioned embodiments are directed to overhead cranes, the present invention can also be applied to cranes having a portal structure. Furthermore, it is ideal for cranes used in places where foundations are insufficient, such as landfills.

As detailed above, the present invention provides an overhead crane,
The driving parts of the traveling and traversing parts of a crane such as a gantry crane are each driven by a flotation device and, for example, a rubber tire drive wheel, which reduces running resistance, reduces noise, and saves energy. be able to. Further, according to the present invention, for example, by using existing iron plate materials, the traveling path section of the moving part of the crane can be constructed, so that when new crane equipment is installed, the manufacturing cost of the equipment foundation can be reduced. I can do it.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an overhead crane which is an example of a crane according to the present invention, and FIG.
Figure 3 is an enlarged plan view of the end of the girder seen from the line in Figure 2, Figure 4 is a side view of the end of the girder viewed from the line - in Figure 2, Figure 4 is a bottom view of Figure 2, and Figure 5 is an enlarged view of the end of the girder. FIG. 6 is a side view showing the detailed structure of the flotation device and braking means used in the invention, FIG. 6 is a plan view showing details of the guide drive device used in the invention, and FIG. The enlarged plan view shown in FIG. 8 is a side view of the side of the trolley taken from the line - in FIG. 7. 1...Girder, 2...Trolley, 6a, 10a...
... floating guide surface, 6b, 10b... moving guide surface,
7, 11... Levitation device, 8, 12... Braking means,
9, 13... Guide drive device.

Claims (1)

[Claims] 1. In a crane comprising a traveling moving part that moves along a fixed traveling route and a traversing moving part movably installed on the traveling moving part, the fixed traveling route is opposite to the end of the traveling moving part. and a traveling moving part facing the end of the traversing moving part is provided with a floating guide horizontal surface facing the lower surface of the end of the moving part and a moving guiding vertical surface facing the end surface of the moving part, respectively, and each of the moving parts An air flotation device and a braking device are provided on the lower surface of the end facing the horizontal surface of the floating guide, and a guide drive device is provided on the end surface of the end of each moving part facing the vertical surface of the movement guide, and the guide drive device is It is equipped with a rubber tire-type drive wheel, a spring that presses the drive wheel against a vertical surface, and a cylinder that retracts the drive wheel against the spring force of the spring. A crane characterized by comprising a magnetic generator that generates force and a spring that holds the magnetic generator.