Elevator hoist apparatus
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsShinji Yamasaki, Yoshiki Sugiyama, Itsurou Tangiku, Yasumasa Iida
Life of this patent
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Abstract
An elevator hoist apparatus of the type disposed in the bottom of a hoistway has an improved structure for securing the apparatus to the wall of the hoistway. The apparatus also comprises an improved hoist drum having multiple parallel rope grooves formed in the drum so as to spiral around the drum in the same direction from one end of the other to the other. The load acting on the main ropes wrapped around these grooves is thereby equalized, increasing the safety of the apparatus. Furthermore, the ends of the main ropes are secured to the drum so that the main ropes are reliably secured even when there is no tensile force acting on the main ropes.
Claims8
An elevator hoist apparatus for use in an elevator hoistway having a machine room provided above the pit portion of the hoistway which opens onto said hoistway, comprising:
- a hoist;
- a base on which said hoist is rigidly mounted;
- and
- plate-like securing means for securing said base to the wall of said hoistway just below said machine room, said securing means having a base-securing hole formed therein near its upper end, said securing means being secured to the wall of said hoistway just below said machine room, one end of said base passing through said base-securing hole and being rigidly connected to said securing means.
Dependencies are inferred from the claim text.