| 摘要 |
<p>PURPOSE: To unwind and wind an electric wire with a small-sized device by rotating a sprocket whose teeth get in the notches of a belt provided at regular intervals in the normal and reverse directions by means of a motor and hooking the front end of the belt on the front part of a telescopic rod composed of a plurality of parts housed in thicker parts in extendable states. CONSTITUTION: When a telescopic rod is not used, all parts constituting the rod are housed in the first part 32 housed in a rod sleeve 31. When a cable is pulled from a far place, a switch 21 is turned on in the draw out direction. Then a motor 12 is started and rotates a sprocket 14 through a gear 13 and timing belt 16. The teeth of the sprocket 14 is engaged with a sell belt 3 between belt retainers 17 and moves the belt 3 in the direction B. The parts constituting the telescopic rod are successively drawn out of the sleeve 31 from the front part fixed to the belt 3 and hooks a cable when the drawn-out length of the rod reaches a required distance. Then the belt 3 is housed 5 by inverting the sprocket 14 in the direction A by switching the switch 21 to the housing direction. Therefore, an electric wire can be drawn out and wound easily with a small-sized device.</p> |
