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Device for elevator

A technology for elevators and stop devices, applied in transportation and packaging, elevators, etc., can solve the problems of slow braking force and time-consuming

Inactive Publication Date: 2007-12-19
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in the above-mentioned conventional brake device and brake control device, both of the basic emergency braking operation and the control of the braking force are performed by one braking force control unit, so the calculation for the braking force control takes time, and the braking force produced slower

Method used

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Examples

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Embodiment Construction

[0015] Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

[0016] Fig. 1 is a configuration diagram showing an elevator apparatus according to Embodiment 1 of the present invention. The car 1 and the counterweight 2 as a lifting body are raised and lowered in the hoistway. A car guide rail 3 for guiding the raising and lowering of the car 1 and a counterweight guide rail (not shown) for guiding the raising and lowering of the counterweight 2 are provided in the hoistway.

[0017] On the upper part of the hoistway, a hoist 4 for raising and lowering the car 1 and the counterweight 2 is installed. The hoist 4 has a drive pulley 5, a motor 6 that rotates the drive pulley 5, a hoist brake 7 that brakes the rotation of the drive pulley 5, and a pulley speed detector that detects the rotation speed of the drive pulley 5 (the rotation speed of the rotation shaft of the motor 6). device 8. As the pulley speed detector 8, f...

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Abstract

In an elevator apparatus, a brake control device has a first brake control portion, a second brake control portion, and a third brake control portion. The first brake control portion operates a hoisting machine brake to stop a ascending / descending body as an emergency measure when an abnormality is detected. The second brake control portion reduces a braking force of the hoisting machine brake when a deceleration of the ascending / descending body becomes equal to or higher than a predetermined value during an emergency braking operation of the hoisting machine brake. The third brake control portion monitors a slip speed of a main rope with respect to a drive sheave during emergency braking operation of the hoisting machine brake, and reduces a braking force of the hoisting machine brake when the slip speed of the main rope becomes equal to or higher than a predetermined value.

Description

technical field [0001] The present invention relates to an elevator apparatus having a brake control device for controlling the brake of a hoisting machine. Background technique [0002] In a conventional elevator brake device, during emergency braking, the braking force of the electromagnetic brake is controlled based on a deceleration command value and a speed signal so that the deceleration of the car becomes a predetermined value (for example, refer to Patent Document 1). [0003] In addition, in the conventional elevator braking control device, when the rope sliding speed obtained as the difference between the pulley speed and the car speed during emergency braking becomes more than a predetermined value, the application of the braking force is weaker than that of the full braking force. The braking force (for example, refer to Patent Document 2). [0004] Patent Document 1: Japanese Patent Application Laid-Open No. 7-157211 [0005] Patent Document 2: Japanese Patent...

Claims

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Application Information

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IPC IPC(8): B66B1/32B66B5/02B66B5/22
CPCB66B5/02B66B1/32B66B5/22
Inventor 上田隆美柴田益诚冈本健一高桥理
Owner MITSUBISHI ELECTRIC CORP
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