JPH06271237A - Maintenance inspection device for elevator - Google Patents

Abstract

PURPOSE:To provide a maintenance inspection device capable of easily executing maintenance inspection, in a governor of mounting a absolute value-type rotary encoder. CONSTITUTION:By preventing an absolute value-type rotary encoder driving roller 4 and a absolute value-type rotary encoder 3, pressed to a governor pulley 2 by a pressing spring 5, from coming into contact with the governor pulley 2 by a maintenance inspection device 6, a characteristic of a governor 1 can be accurately detected. In this way, maintenance inspection of the governor can be easily executed, and by informing the maintenance inspection executed, forgetting the maintenance inspection device removed, after ending maintenance inspection, is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator maintenance / inspection device.

[0002]

2. Description of the Related Art A conventional elevator car position detecting device detects as described in JP-A-57-72582 and JP-A-61-94984, but recently, an absolute value type rotary encoder was used. There is an elevator that is attached to the governor and detects the position of the car.

[0003]

In a speed governor to which an absolute value type rotary encoder is attached, if the absolute value type rotary encoder rotates at the same time as the speed governor during maintenance and inspection of the speed governor alone, other than the speed governor. Therefore, there is a problem that the accurate characteristics of the speed governor cannot be detected because of the load.

Further, when the absolute value type rotary encoder is removed from the governor and maintenance is performed, if the absolute value type rotary encoder is forgotten to be returned, it becomes a problem during normal operation of the elevator.

[0005]

According to the present invention, in order to achieve the above object, the absolute value type rotary encoder attached to the speed governor is easily invalidated during maintenance and inspection. The maintenance / inspection device shall have the function of issuing a warning.

[0006]

[Operation] What is required when checking the operating characteristics of the speed governor alone is:
This means that the load other than the governor is not connected, and the characteristics of the governor can be accurately confirmed by disabling the function of the absolute value type rotary encoder only during maintenance and inspection of the governor.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 shows a front view of a governor to which an absolute value type rotary encoder is attached, and FIG. 2 shows a front view of a governor embodying the present invention. The absolute value type rotary encoder 3 attached to the speed governor 1 includes an absolute value type rotary encoder driving roller 4 pressed by a pressing spring 5 against a speed governor pulley 2 which rotates in response to movement of a car. By rotating, the position of the car is detected.
However, if the absolute value type rotary encoder driving roller 4 is pressed against the governor pulley 2 by the pressing spring 5, the accurate characteristics of the governor 1 cannot be detected during maintenance and inspection of the governor unit. There's a problem. Therefore, if the push spring 5 is compressed using the maintenance / inspection device 6 so that the absolute value type rotary encoder driving roller 4 does not come into contact with the governor pulley 2, loads other than the governor will not be connected. The accurate characteristics of the speed governor 1 can be detected. Further, when the micro switch 7 is attached so that the contacts are turned on when the maintenance / inspection device 6 is used, it can be configured to report that the maintenance / inspection is being performed.

FIG. 3 shows the configuration of a reporting circuit for reporting that a maintenance inspection is being performed. When the contact of the micro switch 7 is turned on, the relay coil 8 is excited. When the relay coil 8 is excited, the relay contact 8a is closed and a signal is issued from the alarm device 9. As a result, since the signal is continuously emitted from the alarm device 9 during the maintenance inspection, it is possible to prevent forgetting to remove the maintenance inspection device 6 after the maintenance inspection is completed.

FIG. 4 is a front view of an example in which an absolute value type rotary encoder is attached to a speed governor having a structure different from that of FIG. 1, and FIG. 5 is a front view of an example in which the present invention is implemented in FIG. 6 is a partial detailed view of FIG. 5. Also in the speed governor having such a configuration, the maintenance / inspection device 6 is similarly used to provide a gap between the speed governor pulley 2 and the absolute value type rotary encoder driving roller 4 to perform maintenance / inspection of the speed governor 1. It can be carried out.

[0011]

According to the present invention, the speed governor having the absolute value type rotary encoder can be easily maintained and inspected and the maintenance and inspection device can be prevented from being forgotten to be removed.

[Brief description of drawings]

FIG. 1 is a front view of a speed governor equipped with an absolute value type rotary encoder.

FIG. 2 is a front view of a speed governor embodying the present invention.

FIG. 3 is a circuit diagram for issuing a notification that a maintenance inspection is being performed.

FIG. 4 is a front view of an example in which an absolute value type rotary encoder is attached to speed governors having different structures.

FIG. 5 is a front view of an example in which the present invention is applied to speed governors having different structures.

6 is a partial perspective view of FIG.

[Explanation of symbols] 1 ... governor, 2 ... governor pulley, 3 ... absolute value type rotary encoder, 4 ... absolute value type rotary encoder driving roller, 5 ... push spring, 6 ... maintenance / inspection device, 7 ... Micro switch, 8 ... Relay coil, 8a ... Relay contact,
9 ... Notification device.

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Takayuki Hashimoto 1070 Ige, Katsuta City, Ibaraki Prefecture Hitachi Ltd. Mito Plant

Claims (3)

[Claims] 1. An elevator governor equipped with a position detector that is driven by a roller pressed against a governor pulley by spring force, and is movable so that the governor pulley and the roller do not come into contact with each other. A maintenance / inspection device for an elevator, characterized in that means for temporarily restraining the pressing portion to the casing of the speed governor is provided. 2. The maintenance / inspection device according to claim 1, wherein a switch is attached between the movable pressing portion and the governor casing. 3. The maintenance / inspection device according to claim 2, which has a function of detecting the operation of the switch and stopping the elevator or issuing an alarm.