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Elevator system

A technology for elevators and braking devices, which is applied in transportation, packaging, elevators, etc., and can solve problems such as failure to detect abnormalities in sensors, abnormalities in braking control units, and increased costs.

Active Publication Date: 2014-02-26
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, in the conventional electronic security system described above, a communication unit and power supply wiring for driving the communication unit are required for each bus node, and the cost increases.
In addition, in the conventional brake control device, it is impossible to detect the abnormality of the sensor and the abnormality of the brake control unit itself.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0020] figure 1 It is a block diagram showing the elevator apparatus according to Embodiment 1 of the present invention. In the figure, the car 1 and the counterweight 2 are suspended in the hoistway by the main rope 3 as the suspension unit, and are lifted and lowered in the hoistway by the driving force of the traction machine 4 .

[0021] The hoisting machine 4 has: a driving sheave 5 around which the main rope 3 is wound; a hoisting machine motor 6 which rotates the driving sheave 5 ; and a braking device 7 which brakes the rotation of the driving sheave 5 . The braking device 7 has a first braking portion 7a and a second braking portion 7b.

[0022] The hoisting machine motor 6 is provided with a speed detector 8 that generates a signal corresponding to the rotational speed of the rotating shaft of the hoisting machine motor 6 , that is, the rotational speed of the drive sheave 5 . The traction machine motor 6 and the braking device 7 are controlled by an operation cont...

Embodiment approach 2

[0074] under, Figure 6 It is a configuration diagram showing an elevator apparatus according to Embodiment 2 of the present invention. In the figure, the operation control device 9 has a hoisting machine control unit 21 and a front-end / brake control unit 24 . The front end / brake control unit 24 has both the function of the front end unit 23 of the first embodiment and the function of the brake control unit 22 . Furthermore, the hoisting machine control unit 21 and the front end / brake control unit 24 are accommodated in a common control cabinet.

[0075] The front end / brake control unit 24 has a first front end / brake control calculation unit 24a, a second front end / brake control calculation unit 24b, a front end / brake control common storage unit 24c, a front end / brake control failure notification unit 24d, and Front end / brake control communication unit 24e.

[0076] The first front end / brake control computing unit 24a has the functions of the first brake control computing u...

Embodiment approach 3

[0079] then, Figure 7 It is a configuration diagram showing an elevator apparatus according to Embodiment 3 of the present invention. In the figure, the front-end part 23 does not have a computing part and a shared memory part, but has only the 1st front-end communication part 23f and the 2nd front-end communication part 23g. In addition, the brake control unit 22 is provided with a first brake control communication unit 22f and a second brake control communication unit 22g instead of the brake control communication unit 22e. Thus, the input signal and the deceleration control command signal are transmitted and received through the two-system direct communication system. In addition, communication with the hoisting machine control unit 21 is performed through one of the two systems. Other structures are the same as those in Embodiment 1.

[0080] In such an elevator apparatus, the number of components can be reduced to simplify the structure, and the control cabinet can be...

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PUM

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Abstract

In an elevator apparatus, a braking control portion includes: first and second braking control computing portions; a braking control shared memory portion that stores shared data for the first and second braking control computing portions; and a braking control communicating portion that performs transmitting and receiving of signals to and from a hoisting machine control communicating portion. The first and second braking control computing portions compare input signals and computational results with each other by means of the braking control shared memory portion, and also output a failure detection signal from the braking control communicating portion if a compared result exceeds a predetermined range.

Description

technical field [0001] The present invention relates to an elevator apparatus using a plurality of speed detectors that generate signals corresponding to the rotation of a drive sheave, and a braking control unit controls a braking device based on signals from a plurality of systems of the speed detectors. Background technique [0002] Generally, the safety system of an elevator is constituted by a series circuit including a plurality of switches and a plurality of contacts, that is, a safety chain. Among these contacts and switches are operated according to the motion of the car, such as the overspeed governor and limit switches. And, the opening and closing of the landing door and the locking device are operated according to the movement of the door. [0003] In contrast, in conventional elevators using electronic safety systems, the central controller monitors various sensors, contacts, and switches through the electronic safety bus. At each location, the bus nodes are ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B66B1/32
CPCB66B1/32B66B5/02
Inventor 上田隆美地田章博
Owner MITSUBISHI ELECTRIC CORP