JPH034096Y2 - - Google Patents

Description

[Detailed explanation of the invention] "Industrial application field" This invention relates to an underground cable extension work vehicle that connects a wire rope to the tip of an underground cable, winds the wire rope, and routes the cable underground. be.

``Conventional technology'' Conventionally, the cable was routed underground by connecting a wire rope to the tip of a winding cable above ground and pulling it through a manhole, through an underground tunnel, and back to the ground from the next manhole. ing. As shown in FIG. 8, the wire rope was wound up by a cable rolling car, and the wire rope was wound up on a wire winding drum installed on the ground. Therefore, since the winding by the cable extension car and the winding by the ground-mounted take-up drum were provided independently, the winding speed of the wire rope by the hoist drum on the cable extension car and the wire rope hoist by the take-up drum were determined. It was difficult to carry out smooth underground cable extension work due to wire rope breakage due to excessive tension of the wire rope due to mismatching speeds, or slippage between the hoisting drum and the wire rope due to loosening. It took effort to operate.

``Problems to be solved by the invention'' The purpose of this invention is to interlock the hoisting and winding of the wire rope to smoothly carry out underground cable extension work, improve work efficiency, and save labor. It is.

``Means for Solving the Problems'' In this invention, a wire rope winding drum is rotatably supported on the front side of a car loading platform, the wire rope winding drum is pivotally supported on the rear side, and the wire rope winding drum is rotatably supported on the rear side. The underground cable extension work vehicle is equipped with means for interlocking the rotation device of the hoisting drum with the drive device of the hoisting drum via a variable tension device.

``Operation'' Therefore, the automobile is fixedly stopped at a fixed position, a wire rope is wound several times around the winding drum at the rear of the loading platform, and the tip of the wire rope is further wound around the winding drum at the front of the loading platform. By making a detour and supporting the drum, the winding drum and the winding drum can be simultaneously rotated by a driving device for the winding drum. In this way, since the wire rope being hoisted by the hoisting drum is loaded, tension is applied to prevent the hoisting drum from idling, and the rotating device of the hoisting drum is driven via the torque limiter. The winding drum can be rotated by the rotating device to wind the wire rope onto the drum. The circumferential speed of the hoisting drum and the circumferential speed of the winding drum are set to be at least the same speed. As the winding diameter of the winding wire rope increases, the winding circumferential speed of the wire rope increases and the tension increases, but in this case, the tension variable device operates to suppress the rotational speed (RPM) of the winding drum. This prevents the winding circumferential speed from increasing. After the winding drum has finished winding, it is replaced with a spare winding drum mounted on the loading platform.

"Example" Bearings 9, 9 whose upper surface can be opened and closed are provided in the machine frame 10 on the front side of the loading platform 2 of the automobile 1 (see FIGS. 6 and 7),
Open the co-bearings 9, 9 and wire rope winding drum 4.
Supporting both ends of the rotating shaft 11 inserted into the
9 with lever 12' (Fig. 7). Rotating axis 1
1 and the side surface of the drum 4 are fixed in the rotational and sliding directions by a clamping device provided by a handle 12, and an input gear 13 is provided on one side, and an output gear that meshes with the gear 13 is provided on the lower side of the machine frame 10. 14 is provided to form the rotation device 6. A hoisting drum 5 (capstan winch) for the wire rope 3 is pivotally supported at the rear of the loading platform 2, and a gear 16 provided on a support shaft 15
The drum 5 can be rotated by meshing with the gear 18 provided on the drive shaft 17 of the hydraulic motor drive device 7. A gear housing 19 is provided on the loading platform 2 at an intermediate portion between the two drums 4 and 5, and meshing gears 20 and 21 are housed in the gear housing 19, and the sprocket 22 provided on the support shaft of one of the gears 21 and the rotation Interlocking sprocket 23 provided on the support shaft of the output gear 14 of the device 6
and are connected by an endless chain 24. Also the other gear 2
A tension variable device 8 is provided on the support shaft 25 of 0.
This device 8 has a floating sprocket 2 between a receiving plate 26 fixed to a support shaft 25 in the rotational direction and a sliding plate 27.
8 is interposed, and the outer surface of the sliding plate 27 is pressed by a disc spring 29 to sandwich the sprocket 28. This floating sprocket 28 and the sprocket 3 provided on the drive shaft 17
0 and an endless chain 31 is wound around it. In addition, what is indicated by 32 in the figure is a cylinder for lifting the loading platform 2;
3 is a worm gear provided on the drive shaft 17, 34 is a worm, 35 is a hydraulic motor connected to the worm shaft, 36 is an encoder, 37 is a control valve for operating the hoisting drum, 38 is its operating lever,
39 is a crane (500Kg), 40 is a crane operating lever, 41 is an oil tank, 42 is a hydraulic pump,
43 is the engine of the car 1.

``Effects'' Since the present invention is constructed as described above, the winding of the wire rope by the hoisting drum and the winding of the same wire rope by the take-up drum are harmoniously linked and carried out extremely smoothly and safely, improving the efficiency of underground cable extension work. Not only can this be improved, but also labor can be saved.

[Brief explanation of the drawing]

Fig. 1 is a side view showing an embodiment of the underground cable extension work vehicle of the present invention, Fig. 2 is a longitudinal sectional view of the wire rope hoisting drum and drive device, and Fig. 3 is Fig. 2A-
4 is a longitudinal sectional view of the tension variable device, 5 is a side view of the winding drum, 6 is a front view of the drum, and 7 is a view of the bearing of the drum. The enlarged side view, FIG. 8, is a plan view of a working state using a conventional underground cable extension car. 1... Car, 2... Loading platform, 3... Wire rope, 4... Winding drum, 5... Hoisting drum, 6...
... Rotating device, 7... Drive device, 8... Tension variable device.

Claims (1)

[Scope of utility model registration request] A wire rope winding drum is removably pivoted on the front side of the loading platform of the automobile, the wire rope hoisting drum is pivoted on the rear side, and the rotating device for the winding drum is used as a drive device for the hoisting drum. An underground cable extension work vehicle equipped with means for interlocking via a variable tension device.