JP2002003113A - Car top maintenance and operation device of elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a car top maintenance and operation device of an elevator having a simple configuration and capable of safely implementing the manual operation of the elevator on a car top ceiling. SOLUTION: This car top maintenance and operation device comprises a cable of a predetermined length for outputting the signals from load detecting means 4A and 4B to the maintenance and operation device 3 and connectors 3B1, 3B2, 4A1 and 4B1 to connect the cable to the maintenance and operation device 3 in an attachable/detachable manner, and load detecting means 4A, 4B, 4Aa and 4Ba comprising at least two mat switches are disposed in the center of the top ceiling 1A of a car 1 with predetermined intervals.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator on-car maintenance operation device in which an operator manually operates an elevator on a car during maintenance and inspection of the elevator.

[0002]

2. Description of the Related Art Conventionally, Japanese Patent Application Laid-Open No. 9-30747 discloses
An elevator equipped with an operation mode changeover switch for switching the elevator to a manual operation mode during maintenance of the elevator and for switching to an automatic operation mode during normal operation, and a traveling switch for manually operating the elevator when switching to the manual operation mode. The maintenance operation device on a car includes load detection means for detecting a person on the ceiling above the car, and manual operation mode switching means for switching to a manual operation mode based on an output signal of the load detection means. There has been a technology provided with a running stop means for stopping the running of the car based on an output signal of the means.

[0003]

The above prior arts involve a problem that wiring is troublesome because a traveling switch and a load detecting means which are manually operated for traveling are incorporated into a control device of an elevator. When performing maintenance operation of an elevator using a switch, if multiple workers are on the ceiling of the car, the load detection means cannot detect multiple workers separately, and any of the workers may be in danger while traveling. There is a problem that it is not possible to stop the elevator reliably when it is located in a suitable place.

[0004] A first object of the present invention is to provide an elevator car maintenance operation device which can safely perform an elevator manual operation on a car ceiling with a simple configuration.

A second object of the present invention is to provide an elevator car maintenance and operation device which can prevent an accident during manual operation of the elevator on the ceiling above the car.

[0006]

In order to achieve the first object, the invention according to claim 1 switches the elevator to a manual operation mode during maintenance and inspection of the elevator, and switches to an automatic operation mode during normal operation. An operation mode changeover switch for switching, a maintenance operation operation device for manually operating the elevator when the manual operation mode is switched, and load detection means for detecting a person riding on the car ceiling;
In a maintenance operation device on a car of an elevator, comprising a traveling detection device for traveling and stopping the car based on an output signal of the load detection device, a predetermined length for outputting a signal of the load detection device to the maintenance operation device. And a connector for detachably connecting the cable and the maintenance operation device.

[0007] With this configuration, when the elevator is manually driven on the car ceiling, the operator connects the cable provided on the mat switch, which is the load detecting means, to the maintenance operation device via the connector. By connecting and applying a load by placing a foot on each mat switch, manual operation by the maintenance operation operation device becomes possible, and the position of the worker on the car ceiling can be restricted at the place where the mat switch is installed, so the car Safety during traveling by manual operation on the upper ceiling can be ensured.

In order to achieve the second object,
According to a second aspect of the present invention, the load detecting means includes at least two mat switches and is arranged at a predetermined interval in the center of the car ceiling.

[0009] With this configuration, the operator can restrict the posture of the worker by placing both feet on the two mat switches. Since part of the body does not protrude, it is possible to reliably prevent an accident of hitting or being caught in the hoistway equipment during manual operation on the car ceiling.

[0010]

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

FIG. 1 is a perspective view of a main part of an elevator car in accordance with an embodiment of the present invention. FIG. 2 is a perspective view of a main part of the elevator car in accordance with an embodiment of the present invention. It is a principal part circuit diagram.

First, the configuration of the elevator car on-board maintenance operation device will be described with reference to FIG.

In FIG. 1, a ceiling 1A of a car 1 of an elevator is composed of pillars 2A of a predetermined height standing at four corners and handrails 2B disposed at three ends of the pillars 2A. A safety rail on the car 2 is provided. The safety rail on the car 2 prevents the worker from protruding to the hoistway side during traveling and hitting or being caught in the equipment in the hoistway. A safety rope attached to the worker's waist is attached to prevent the vehicle from falling when performing a work related to the operation. Also, a maintenance operation device 3 in which the worker runs the elevator on the ceiling 1A of the car 1 is shown. To the elevator control circuit not to be connected via a cable 3A and a connector (not shown), and plugs 4A1, 4B1 and cables 4A2, 4B2 are connected to the jacks 3B1, 3B2 of the maintenance and operation device 3. Contacts 4A is a load detecting means via
The mat switch 4A having the contact a and the mat switch 4B having the contact 4Ba are connected to each other. here,
These mat switches 4A and 4B are 400 m in length and width.
It has a rectangular shape of mx 300 mm, and the respective center lines are arranged at, for example, 500 mm intervals without shifting to the center of the ceiling 1A of the car 1.

The maintenance operation device 3 includes a jack 3
In addition to B1 and 3B2, there is an up button 3C for operating the car 1 at low speed and a down button 3D for low speed operation. The up button 3C and the down button 3D are non-lock switches and their respective contacts are not closed at the same time. And a switch 3E for enabling or disabling the operation of the up button 3C and the down button 3D.

The main part circuit diagram of the above-car maintenance and operation device will be described with reference to FIG.

In FIG. 2, a contact 5a of a stop switch (not shown) provided in the car 1 room or the ceiling 1A between the power supplies PN to prevent the elevator from running, and provided in the car 1 room or the ceiling 1A, A common terminal 6 of a contact 6a of an operation changeover switch (not shown), which is an operation mode changeover switch for changing the operation of the elevator between a normal operation and a maintenance operation that operates at a low speed when a predetermined button is pressed.
a1, a terminal 6a2 of the contact 6a, and a normal travel command relay 7 for instructing the elevator to travel normally when energized are connected in series. A terminal 6a3 of the contact 6a;
Contact 3 of switch 3E connected via cable 3A
Ea, the jack 3B1, the contact 4Aa of the mat switch 4A via the plug 4A1 and the cable 4A2, the cable 4C, the contact 4Ba of the mat switch 4B, and the jack 3B2 via the cable 4B2 and the plug 4B1.
And an up button 3C and a down button 3 which are non-lock switches.
D common terminal 3Fa1 of switch 3F and switch 3F
And a low speed rise command relay 8 for instructing the elevator to run at a low speed when energized is connected in series. A terminal 3Fa3 of the switch 3F and a low speed lowering command relay 9 for instructing the elevator to run at a lower speed when energized are connected in series.

Next, the operation of the thus-configured elevator car maintenance operation device of the present embodiment will be described.

First, the operator operates the stop switch (not shown) in the car 1 to close the contact 5a before getting on the ceiling 1A of the car 1, and operates the operation changeover switch (not shown) to operate the contact 5a. When the common terminal 6a1 and the terminal 6a3 of 6a are connected by the operating piece 6a4, the urging of the normal travel command relay 7 is prevented, and only the maintenance operation can be performed. Next, the worker connects the cables 4A2 and 4B2 to the mat switches 4A and 4B, respectively, attaches the plugs 4A1 and 4B1 of these cables 4A2 and 4B2 to the jacks 3B1 and 3B2, and performs the maintenance operation with the mat switches 4A and 4B. The operation device 3 is connected, and the maintenance operation device 3 is connected to an elevator control circuit (not shown) via a cable 3A and a connector (not shown).

Here, when the car 1 is to be lifted, the operator puts both feet on the mat switches 4A and 4B and operates the switch 3E to close the contact 3Ea. After the low speed ascent or descent maintenance operation is enabled by pressing the up button 3C, the P-contact 5a-contact 6a (common terminal 6a1-operating piece 6a4-terminal 6a3) -cable 3A-contact 3Ea -Jack 3B1-Plug 4A1-Cable 4A2-Mat switch 4A (contact 4Aa)-Cable 4C-Mat switch 4B (contact 4Ba)-Cable 4B2-Plug 4
B1-jack 3B2-switch 3F (common terminal 3Fa)
A circuit of 1-operating piece 3Fa4-terminal 3Fa2) -low speed rise command relay 8-N is formed, and the low speed rise command relay 8 is energized, so that the car 1 rises at a low speed.

Next, when the car 1 reaches the target position and stops pressing the up button 3C, the operating piece 3Fa of the switch 3F
4 returns to the neutral position, and the low speed rise command relay 8
Is deactivated, and the car 1 stops.

As described above, in the present embodiment, when the maintenance operation of the car 1 is performed by using the maintenance operation operation device 3 on the ceiling 1A of the car 1, the operator operates the mat switches 4A, 4
It is necessary to operate the maintenance operation operation device 3 in a state where the car 1 is placed on the car B, the car 1 cannot be moved from the center of the ceiling 1a, and since the feet are spread, the direction of the body is changed. This also makes it inconvenient, so that it is possible to reliably prevent an accident in which the worker hits or gets caught in the hoistway equipment while the car 1 is traveling.

In the present embodiment, the description has been given of the case where the car safety rails 2 are provided in advance on the ceiling 1A. However, the same applies to the case where the car safety rails 2 are assembled and used when working on the ceiling 1A of the car 1. The effect is obtained, and furthermore, using the on-car maintenance operation device of the elevator of the present embodiment,
If a lifeline is attached to the guide rail erecting bracket when working on the hoistway equipment, the safety handrail 2 on the car can be used as long as it is careful not to hit the ceiling of the hoistway.
Also becomes unnecessary.

Further, in the present embodiment, the case where one worker is mounted on the ceiling 1A has been described. However, when two workers are mounted on the mat switches 4A and 4B, the same effect can be obtained. Also, one mat switch may be used.
Obviously, two contacts may be provided on one mat switch.

[0024]

According to the present invention, when the elevator is driven manually on the car ceiling, the operator operates the maintenance operation device via the connector by connecting the cable provided on the mat switch which is the load detecting means. As well as connecting to the mat switch and applying a load by putting a foot on each mat switch, manual operation by the maintenance operation operation device becomes possible, and the position of the worker on the car ceiling can be restricted at the place where the mat switch is installed, Safety during traveling by manual operation on the ceiling above the car can be ensured.

[Brief description of the drawings]

FIG. 1 is a perspective view of an on-car maintenance operation device of an elevator according to an embodiment of the present invention.

FIG. 2 is a main part operation circuit diagram of the elevator on-car maintenance operation device according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Car 1A Ceiling 3 Maintenance operation operation device 3B1, 3B2 Jack 4A, 4B Mat switch 4A1, 4B1 Plug 4Aa, 4Ba Contact point of mat switch 4A2, 4B2, 4C Cable

Claims (2)

[Claims] 1. An operation mode switching switch for switching an elevator to a manual operation mode during maintenance and inspection of an elevator and for switching to an automatic operation mode during normal operation, and a maintenance operation for manually operating the elevator when switching to the manual operation mode. In a car maintenance operation device of an elevator equipped with a device, load detection means for detecting a person riding on the car ceiling, and travel detection means for stopping and running the car based on an output signal of the load detection means, An elevator car maintenance, comprising: a cable of a predetermined length for outputting a signal of the load detection means to the maintenance operation device; and a connector for detachably connecting the cable to the maintenance operation device. Driving device. 2. The maintenance operation device according to claim 1, wherein said load detection means comprises at least two mat switches and is arranged at a predetermined interval in a center of said ceiling above said car.