Toshiba Elevator Kabushiki Kaisha

Kan Kawasaki

Takashi Ishii

Ikuo Asami

Shun Fujimura

Hiroshi Sano

Masayuki Higashi

Satoshi Takasawa

Kazuhiro Izumi

Takanori Urata

Masahiro Kuramitsu

Kazuaki Miyakoshi

Shigeru Takaishi

A machineroom-less elevator in which a counterweight is vertically moved behind a cage, with the cage and the counterweight being suspended in a jig back manner through a first and second diverting sheaves. In this machineroom-less elevator, a sufficiently large vertical stroke of the counterweight can be secured, while a durability of a hoist rope is improved. In addition, since no tensile difference is generated in respective parts of the hoist rope, vertical vibrations of the cage are prevented when the cage restarts a vertical movement. A traction sheave is disposed on one of right and left sidewalls of an elevator shaft. A first diverting sheave is disposed below and sufficiently apart from the traction sheave, and a second diverting sheave is disposed on a top of a rear wall of the elevator shaft. The traction sheave is disposed to be inclined relative to the sidewall such that a rotational axis thereof extends from the sidewall of the elevator shaft to the rear wall thereof, when viewed vertically from above.

Machine room-less elevator

An elevator in which a driving apparatus, a traction sheave, and a counterweight-side rope hitching portion are arranged above one rail of the right and left cage-side guide rails, while a cage-side rope hitching portion and a speed governor are arranged above the other rail of the right and left cage-side guide rails. Since a control panel is arranged along a rear inner wall surface of the machine room, a large operation space can be secured in a center part of the floor of the machine room. Further, since a machine beam can be extended at full length in the back and forth direction in the machine room, no additional building-side receiving beam is needed.

Elevator with an operation space in a center of a machine room

In an elevator, a drive device, a traction sheave, and a weight-side stop portion are arranged above one of a pair of left and right cage-side guide rails, and a cage-side stop portion and speed governor are arranged above the other cage-side guide rail. A wide workspace is realized in the middle of the floor of the machinery chamber, since the control panel is arranged along the middle of the inside wall surface of the front face of the machinery chamber. Furthermore, provision of an additional supporting beam mounted in the building is unnecessary, since the machine beam can extend fully in the forwards/rearwards direction in the interior of the machinery chamber.

Elevator

Rubber vibration isolators are held between a base frame supporting a driving device and an upper deflecting sheave, and a support connected to car guide rails and a counterweight guide rail. The rubber vibration isolators are held between a horizontal member and vertical members of a support frame supporting lower deflecting sheaves. Transmission of vibrations generated by the driving device, the upper deflecting sheave, and the lower deflecting sheaves to the side walls of an elevator shaft can be intercepted.

There is provided an machineroom-less elevator which can reduce the pit depth in a bottom part of an elevator shaft, mostly perform maintenance work on an upper space of a cage, and reduce a top clearance. A pair of right and left cage-side sheaves are disposed in the upper space of the cage, and the rotational axes of the traction sheave and the cage-side sheaves are extended in the longitudinal direction. A sheave supporting beam to rotatably support cage-side sheaves is disposed in a space between and upper beam of the cage frame and a ceiling of the cage, and disposed below rotary shafts of the cage-side sheaves.

Growing community of inventors

Fuchu, Japan

Kan Kawasaki