JP2852002B2 - External power supply mechanism in construction elevator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction elevator used when, for example, various construction materials are carried into a floor of a building at a building construction site, and more particularly to a construction elevator for transferring luggage inside and outside the elevator. The present invention relates to an external power supply mechanism that supplies power to an electric bogie.

[0002]

2. Description of the Related Art A typical example of an electric trolley for transferring luggage to and from a construction elevator is described in Japanese Patent Application Laid-Open No. HEI 6-171865. In this prior art,
A track is provided on the elevator floor in the direction of the doorway, and a forklift-type electric bogie is mounted along the track. This truck reciprocates linearly within a certain range of rails inside the elevator, and loads and unloads cargo within a very limited range between the inside of the elevator and the outside near the entrance.

Also, in consideration of weight reduction and miniaturization, this type of electric bogie does not have a driving battery,
A cable extending from a power supply board in the elevator is connected to the electric bogie, and operates by receiving power supply from the outside. Therefore, it can be used within a range where the power cable extends.

[0004]

In the above prior art,
Luggage can only be dropped off at a location close to the entrance of the elevator, and only luggage at that location can be loaded into the elevator. Therefore, another luggage transporting means is indispensable outside the elevator, and another person who transports the luggage unloaded from the elevator to a required location or transports the luggage loaded into the elevator to a location near the entrance of the elevator is also required separately. This method is not a problem for sites with large floors, but for small sites, it is costly to separately prepare the luggage transfer means inside and outside the elevator and the luggage transportation means and workers on each floor. It's too much, and there is a space problem.

Accordingly, the present inventors have abolished the track defining the traveling range of the electric bogie, and have developed an electric bogie that can travel freely within a range in which the power cable extends. In order to extend the traveling range, a sufficiently long power cable was prepared in the elevator, and this was connected to the electric bogie. However, when such a long power cable is used, the cable hangs irregularly on the floor inside and outside the elevator, and it is very troublesome to clear the cable on the floor so as not to step on it. If a cable on the floor is trampled by an electric bogie, the insulation of the cable may be damaged, or in extreme cases, the cable may be cut, which is dangerous. Without removing the cables, the travel of the electric trolley is significantly restricted, and the work of transferring the luggage cannot be performed freely.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and has as its object to provide a construction work in which a long power cable is not obstructed even when a long power cable is connected to an electric bogie traveling inside and outside an elevator. An object of the present invention is to provide an external power supply mechanism in an elevator.

[0007]

According to the present invention, a power supply board is provided in an elevator car, one end of a sufficiently long power cable is connected to the power supply board, and a vertically long guide cylinder is provided. A heavy moving pulley that moves up and down along the guide tube is provided, and the power cable is passed through the upper end of the guide tube from the upper end thereof, is turned U by the moving pulley, and is pulled out from the upper end of the guide tube to the outside. A swing type fixed pulley provided at a high position of the cage is provided, and the power cable drawn from the guide tube is extended through the fixed pulley.

[0008]

The leading end of the power cable drawn from the fixed pulley is connected to an electric bogie. When the bogie moves away from the elevator, the power cable is pulled, and the moving pulley rises to draw out the power cable. When the bogie returns to the elevator, the moving pulley is lowered by its own weight, and the extra power cable is drawn into the guide cylinder and stored.

[0009]

FIG. 1, FIG. 2, and FIG. 3 show the configuration of an embodiment of the present invention. As shown in FIG. 1 showing the overall schematic configuration, a forklift type electric trolley 2 is mounted on a floor 1a of a construction elevator cage 1, and a load 20 is placed on the fork 2a. A power supply board 3 is provided on a ceiling 1 b of the elevator car 1, and a long guide tube 4 is provided below the power feed board 3 along a side surface of the car 1. Further, a fixed pulley 6 which is swingable in a configuration described later is attached to the cage ceiling 1b near the upper end opening of the guide cylinder 4. Further, the guide cylinder 4
A heavy moving pulley 5 is set inside. This moving pulley 5
Is guided between the pair of frames 4a constituting the guide cylinder 4 and falls downward by its own weight, and rises as described below.

The power supply board 3 is connected to the base end of a sufficiently long power cable 7. The power cable 7 is passed through the guide tube 4 from the upper end, is U-turned by the moving pulley 5, is drawn out from the upper end of the guide tube 4, and the drawn power cable 7 is stretched through the fixed pulley 6, and the cable end is pulled out. It is connected to the plug of the electric bogie 2. The moving pulley 5 in the guide tube 4 also serves as a weight, and the power cable 7 that is U-turned in the guide tube 4 hangs under an appropriate tension due to the weight of the moving pulley 5.

When the electric trolley 2 travels and moves away from the elevator car 1, the power cable 7 is pulled, and the movable pulley 5 rises in the guide cylinder 4 and the power cable 7
Pay out. When the electric trolley 2 returns to the elevator cage 1, the moving pulley 5 falls down by its own weight in the guide tube 4, and the extra power cable 7 is drawn into the guide tube 5 and stored.

Here, the swing mechanism of the fixed pulley 6 will be described. As shown in FIG. 3, a shaft 9 is provided integrally with a bracket 8 that rotatably supports the pulley 6. On the other hand, the means for installing the pulley 6 in the elevator car 1 is a bearing 10, and the shaft 9 of the bracket 8 is arranged vertically,
It is supported rotatably right and left within a predetermined range. Thus, the fixed pulley 6 can swing right and left, and the pulley 6 swings according to the traveling direction of the electric bogie 2 so that unnecessary resistance is not added to the power cable 7.

[0013]

According to the present invention, when the electric bogie to which the power cable is connected moves away from the elevator, the power cable is pulled, and the movable pulley rises to draw out the power cable. When the bogie returns to the elevator, the moving pulley falls down by its own weight, and stores an extra power cable in the guide tube. Therefore,
Even if a sufficiently long power cable is connected to the electric trolley, the cable does not interfere, and the electric trolley can smoothly carry out the load transfer work over a wide area inside and outside the cable.

[Brief description of the drawings]

FIG. 1 is an overall schematic configuration diagram of an external power supply mechanism in a construction elevator according to an embodiment of the present invention.

FIG. 2 is a detailed view showing a relationship between a guide cylinder and a moving pulley in the embodiment.

FIG. 3 is a detailed view of a swing mechanism of the fixed pulley in the embodiment.

[Description of Signs] 1 Elevator cage 1a Floor 1b Ceiling 2 Electric trolley 3 Power supply board 4 Guide tube 5 Moving pulley 6 Fixed pulley 7 Power cable 8 Bracket 9 Shaft 10 Bearing 20 Luggage

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B66B 7/06 B66B 9/187 B66B 17/20 B66D 3/04

Claims (1)

(57) [Claims] 1. A power supply board is provided in an elevator car,
Connect one end of a long enough power cable to the power supply board,
A vertically extending long guide tube is provided and a heavy moving pulley is provided along the guide tube to move up and down along the guide tube. A swing-type fixed pulley is provided to be pulled out from the upper end of the guide tube to be disposed at a high position of the elevator cage, and the power cable drawn from the guide tube is stretched through the fixed pulley. An external power supply mechanism in a construction elevator.