JPH0241448B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a temporary overhead wire hanging device, and particularly to a device for temporarily suspending overhead wires during construction such as three-dimensional construction of a track.

Conventionally, in this type of construction work, for example, overhead wires were suspended from the inside ceiling of a work platform installed across a running train to replace the existing supports, so it was necessary to fix the work platform during construction. As a result, there is a limit to the distance that can be worked in one time, resulting in low work efficiency, and if you try to increase the distance, you will not only have to increase the size of the work platform, but also Rehanging work had to be carried out each time the overhead wire was moved, and there was a need to develop a new means of temporarily suspending the overhead wire during construction.

The present invention was made in response to the above-mentioned request, and its purpose is to run on the rails laid on both sides of the track, pass under the existing overhead wire suspension beams, and move freely. To provide an overhead wire temporary suspension device capable of carrying out construction works safely and efficiently by freely traveling and moving a construction work frame etc. in a predetermined construction section.

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

In FIGS. 1 and 2, reference numeral 1 denotes a column, and a traveling carriage 2 is attached to the lower end of the column.
The traveling carriage 2 is provided with rollers 3, 3, and is configured to run on rails 5 by a motor 4.

A guide rail 6 is attached to the upper part of the support column 1, and a guide roller 7 is in rolling contact with this. The guide roller 7 is rotatably attached to the elevating frame 8 and guides the elevating frame 8 to move up and down along the support 1. The upper end of the elevating frame 8 is fixed to the end of the elevating beam 9, so that the elevating frame 8 can be moved up and down integrally.

A motor 10 is installed at the upper end of the lifting frame 8, and is configured to rotate a worm shaft 13 via an intermediate shaft 11, a chain 12, and the like. Reference numeral 14 denotes a screw jack which is rotationally driven by the worm shaft 13 and moves a screw shaft 16 housed within the cylinder cover 15 in the vertical axial direction. A presser plate 17 is attached to the lower end of the screw shaft 16, and is brought into contact with the upper surface of a horizontal frame 18 fixed to the column 1.

The intermediate shaft 11 extends along the lifting beam 9 to the other end, and is configured to simultaneously operate another lifting device provided there.

In FIG. 3, a stopper wheel 19 is attached to the other end of the worm shaft 13, and the tip of the stopper 20 is engaged with the engagement groove by the bias of a compression spring 21, so that the worm shaft 1
3, that is, the screw jack 14 is locked. The stopper 20 is connected to a solenoid 2 which is energized at the same time as the motor 10 starts rotating.
2, it is pulled up against the compression spring 21.

Next, the operation of the above embodiment device will be explained.

In order to raise the lifting beam 9 from the solid line position to the imaginary line position in FIG. 19, and the screw jack 14 is unlocked.

The rotation of the motor 10 is appropriately transmitted to the intermediate shaft 9 via a speed reducer, and further transmitted to the worm shaft 13 via a chain 12. When the worm shaft 13 rotates, a worm wheel (not shown) of the jack 14 is rotationally driven to push the screw shaft 16 downward. The lower end of the screw shaft 16 is in contact with the horizontal frame 18 of the column 1 via the presser plate 17, so when the screw shaft 16 is pushed downward as described above, the reaction force from the horizontal frame 18 is absorbed. In response, the side of the jack 14 is pushed up, and the elevating frame 8, that is, the elevating beam 9, is integrated with this.
rises. When the lifting beam 9 rises to the imaginary line position in FIG. The jack 14 is locked by engaging with the engagement groove.

A similar lifting device is provided at the other end of the lifting beam 9, and can be operated simultaneously by an intermediate shaft 11.

Further, in order to lower the elevating beam 9 from the position shown by the imaginary line in FIG. 1 to the position shown by the solid line, the same operation as described above may be performed except that the direction of rotation of the motor 10 is reversed. In addition, this overhead wire temporary suspension device shall be equipped with signal lights, etc.

As described above, the present invention can move freely on the rails laid on both sides of the track, and the elevating beam is configured to be able to move up and down, so it can move freely by passing under the existing overhead wire suspension beam. Since the overhead wires can be reliably hung at any position, the work platforms for construction work can move freely, making it possible to carry out construction work safely and efficiently, and the work of rehanging the overhead wires is also effective. It has the advantage of being able to be done.

[Brief explanation of drawings]

Fig. 1 is a front view showing one embodiment of the overhead wire temporary suspension device of the present invention, Fig. 2 is a side view thereof, Fig. 3 is an enlarged vertical sectional view of the lifting device, and Fig. 4 is Fig. 3 A-A. FIG. 3 is a cross-sectional view taken along a line. DESCRIPTION OF SYMBOLS 1... Strut, 2... Running cart, 3... Roller, 4... Motor, 5... Rail, 6... Guide rail, 7... Guide roller, 8... Lifting frame, 9... Lifting beam,
10...Motor, 11...Intermediate shaft, 12...Chain,
13...worm shaft, 14...screw jack,
15...Cylinder cover, 16...Screw shaft, 17...Press plate, 18...Horizontal frame, 19...Stop wheel, 20...Stopper, 21...Compression spring, 22...
solenoid.

Claims (1)

[Claims] 1. An overhead wire temporary suspension device characterized in that an elevating beam is vertically movably installed at the top of left and right supports that can run and move on rails laid on both sides of a track.