JP2001302134A - Maintenance operation device for elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a worker from forgetting about mounting a blocking table on a buffer in starting the maintenance work of an elevator, and dismounting the blocking table in finishing the maintenance work. SOLUTION: The car blocking table 11 is mounted on the buffer 9 for the car in starting the maintenance operation. Whereby a height above the head of a worker can be ensured even when the buffer 9 for the car is completely depressed by the lowering of the car 3. A detecting switch 13 detects the presence or absence of the car blocking table 11. When the absence of the car blocking table 11 is detected by the detecting switch 13, the maintenance operation is inhibited. Further when the detecting switch 13 detects the presence of the car blocking table 11 after the end of the maintenance work, the normal operation is inhibited. The same process is similarly executed on the balance weight 5 side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for operating a car by installing a car block or a counterweight counter in a buffer for maintenance of an elevator.

[0002]

2. Description of the Related Art In general, a conventional elevator is of a type in which a machine room is provided above a ceiling of a hoistway and a hoist is installed in the machine room. However, in recent years, the number of elevators that eliminate the need for a machine room by installing a hoisting machine at the top or bottom in a hoistway has increased. This is because there is an advantage that the installation cost can be kept low because there is no need for a machine room, and that the building can be effectively used to the height of the regulation limit in areas where the height of the building is restricted due to sunshine rights. .

In an elevator having no machine room, the influence of the elevator on the building layout is minimized by shortening the overhead dimension (vertical dimension from the floor of the top floor to the machine support beam or the lower surface of the hoistway top). It has become commonplace. On the other hand, since the hoist is installed in the hoistway, maintenance and inspection work on the car and in the pit increases.

[0004] Therefore, the overhead height of the worker when working on the car and in the pit, that is, the overhead height of the worker to the ceiling of the hoistway when working on the car, and the overhead height of the worker to the lower surface of the car when working in the pit. Measures have been taken to ensure this. That is, a position switch is provided near the terminal floor, and when the car is raised or lowered during the maintenance operation and it is detected that the car has reached the operating point of the position switch, the car is configured not to move further in that direction. .

[0005] Further, even if the car does not stop for some reason by attaching the blocking table to the shock absorber during the maintenance work, the car or the counterweight is supported by the blocking table, so that the worker's weight can be reduced. Consideration has been given to secure evacuation space.

[0006]

In the conventional elevator maintenance and operation apparatus as described above, a blocking table is installed in the shock absorber. However, since this is left to an operator, it is not necessary for maintenance work. There is a problem that it cannot be guaranteed that a blocking table is installed.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is possible to prevent a trouble caused by forgetting to install a blocking table on a shock absorber at the start of maintenance work and removing the blocking table at the end of maintenance work. It is an object of the present invention to provide a maintenance operation device for an elevator.

[0008]

The maintenance operation device for an elevator according to the first invention of the present invention performs the maintenance operation when the detection switch detects that the elevating body blocking table is not installed in the shock absorber during the maintenance operation. Is to prevent.

Further, the maintenance operation device for an elevator according to the second aspect of the present invention, when performing the maintenance operation, detects that the counterweight prevention platform is not installed in the counterweight shock absorber by the detection switch, and performs the operation on the car. The maintenance operation by the operation is prevented.

The maintenance operation device for an elevator according to the third aspect of the present invention, when performing maintenance operation, detects that the counterweight prevention block has been installed in the counterweight shock absorber by a detection switch, and does not sense a hall call. In addition, automatic driving to the top floor is prevented.

Further, the maintenance operation device for an elevator according to the fourth invention, when detecting that the car blocking platform is not installed in the car shock absorber by the detection switch during the maintenance operation, performs maintenance by operating at the bottom of the hoistway. It is designed to prevent driving.

Further, the maintenance operation device for an elevator according to the fifth invention, when detecting that the car block is installed in the car shock absorber by the detection switch during the maintenance operation, makes the hall call insensitive and increases It is designed to prevent automatic driving to the floor.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 1 and 2 are views showing an embodiment of the first to fifth inventions of the present invention. FIG. 1 is a vertical sectional view of a hoistway, and FIG. 2 is a circuit diagram. Show.

In FIG. 1, 1 is an elevator hoistway, 2 is a hoisting machine installed at the bottom of the hoistway 1, 3 is a car (elevator), 4 is a cam provided on the car 3, and 5 is a balance. Weights (lifting bodies), 6, 7 are pulleys installed on the ceiling of the hoistway 1, 8 is connected at one end to the ceiling of the hoistway 1, and the car 3, the pulley 7, the hoist 2, the pulley 6, and the balance The other end is a main rope connected to the ceiling of the hoistway 1 via the weight 5.

Reference numeral 9 denotes a car shock absorber installed at the bottom of the hoistway 1 and arranged corresponding to the car 3, and 10 a counterbalance installed at the bottom of the hoistway 1 and arranged corresponding to the counterweight 5. A weight buffer, 11 is a car block mounted on the top of the car buffer 9 during maintenance, 12 is a counterweight block mounted on the top of the counterweight buffer 10 during maintenance, and 13 is the hoistway 1. It is installed in the car block 11
And 14 is a counterbalance block detection switch for detecting that the counterweight block 12 is mounted.

Reference numeral 15 is installed at the lower part of the hoistway 1, and the car 3
Immediately before colliding with the car shock absorber 9, the lower final limit switch 16 engaged with the cam 4 is installed at the upper part of the hoistway 1, and immediately before the counterweight 5 collides with the counterweight shock absorber 10. An upper final limit switch 17 engaging with the cam 4 is installed at a lower portion of the hoistway 1. When the lower surface of the car 3 reaches a predetermined height from the bottom of the hoistway 1, the upper final limit switch 17 is engaged with the cam 4. And a lower inspection limit switch for securing the overhead height of a maintenance person standing at the bottom of the hoistway 1.

Reference numeral 18 is provided above the hoistway 1 and the car 3
When the upper surface reaches a position at a predetermined distance from the ceiling of the hoistway 1, the upper inspection limit switch engages with the cam 4 to secure the overhead height of the maintenance person standing on the car 3.

In FIG. 2, + and-are DC power supplies, 21 is a car blocking stand detection relay, 21a and 21b are normally closed contacts, 21c is a normally open contact, 22 is a counterweight blocking stand detection relay, 22a , 22b are the normally closed contacts, 22b
c is a normally open contact, 23K is an up operation button provided on the car 3, 23P is an up operation button provided on the bottom of the hoistway 1, 24K is a down operation button provided on the car 3, 24P is a down operation button provided at the bottom of the hoistway 1, 25 is a landing button on each floor, and 26 is a microcomputer. Note that the microcomputer 26 has functions of a maintenance operation preventing unit and an automatic operation preventing unit in addition to the normal elevator control unit.

Next, the operation of this embodiment will be described. (1) During normal operation The car buffer 9 and the counterweight counter 10 are not provided with the car block 11 and the counterweight block 12, respectively. The weight prevention block detection switch 14 is closed.
Therefore, the car block stand detection relay 21 and the counterweight counter block detection relay 22 are energized, and the contacts 21a, 21 are contacted.
b, 22a and 22b are all open, and the contacts 21c and 2b
2c is closed.

As a result, the up operation buttons 23K and 24K and the down operation buttons 23P and 24P above the car 3 and at the bottom of the hoistway 1 are disconnected from the microcomputer 26, and the car 3 and the bottom of the hoistway 1 cannot be operated. It has become. That is, in the normal operation state, for example, when the landing button 25 on any floor is pressed, the landing call signal is taken into the microcomputer 26 through the circuit of the contacts 21c and 22c and registered, and the known control means ( (Not shown)
Drives the hoisting machine 2.

Thus, the car 3 and the counterweight 5 travel in opposite directions via the main rope 8, and stop at the floor where the hall call is registered. If the car 3 descends and does not stop at the lowest floor due to some abnormality, the cam 4 is engaged with the lower inspection limit switch 17, but there is no change in operation. When the cam 4 further descends and the lower final limit switch 15 is engaged, the car 3 is forcibly stopped by this operation. The same applies when the car 3 moves up,
Engages with the upper final limit switch 16,
The car 3 is forcibly stopped.

(2) During Maintenance Operation Prior to the maintenance operation, the maintenance person attaches the car block 11 to the car buffer 9 and the counterweight block 12 to the counterweight buffer 10. As a result, the counter 14 for detecting the counterweight counter is opened, the relay 22 for detecting the counterweight counter is deenergized, and the contact 22a is closed. with this,
If the worker presses the up operation button 23K on the car 3,
The ascending operation signal is taken into the microcomputer 26 through the circuit of the contacts 23K and 22a, and the car 3 ascends at a low speed, and the car 3 stops when the hand is released from the ascending operation button 23K.
The same applies to the case where the down operation button 24K is pressed on the car 3, and the car 3 operates at a low speed.

Next, when the car 3 is raised and the cam 4 is engaged with the upper inspection limit switch 18, the hoist 2 is forcibly cut off and the car 3 stops. Even if it does not stop for some reason, since the balancing weight 5 is supported by the balancing weight prevention table 12, the car 3 cannot be lifted, so that the evacuation space for the worker is secured. . The same can be said for the case where the car 3 descends, and the car 3 is supported by the car blocking stand 11 so that the car 3
Cannot be lowered, and a space for evacuation of workers is secured.

Since the car block 9 is mounted on the car shock absorber 9, the car block detection switch 13 is provided.
Can be opened and the car 3 can be operated at a low speed or at a low speed by operating the up operation button 23P or the down operation button 24P at the bottom of the hoistway 1, but similar to the above-described operation on the car 3 Therefore, the details are omitted.

In the maintenance procedure, after the counterweight counter 12 is attached to the bottom of the hoistway 1 and the top equipment of the hoistway 1 is inspected on the car 3, the vehicle runs to the vicinity of the top floor in normal operation. Is more efficient. However, if the hall call is made valid at this time, there is a possibility that a hall call unknown to the maintenance staff may occur. In this embodiment, the above-mentioned inconvenience is also considered.

That is, when the car block detection switch 13 or the counterbalance block detection switch 14 is opened and the car block detection relay 21 or the counterbalance block detection relay 22 is deenergized, the contact 21c or Since the contact 22c is opened and the landing button 25 is disconnected from the power supply +,
The hall call is no longer registered, and the car 3 does not stop on the floor against the intention of the worker. Also, the contacts 21c, 2
The signal of 2c is taken into the microcomputer 26 to prevent automatic traveling to the terminal floor.

After the maintenance work is completed, the car blocking table 1
If you forget to remove 1 or the counterweight block 12,
Since the car block detection relay 21 or the counterweight prevention block detection relay 22 is not energized, the contacts 21c and 22c remain open and the signal of the landing button 25 is not supplied. As a result, the registration of the hall call remains disabled even after returning to the normal operation, so that the maintenance person can notice that he or she has forgotten to remove the car block 11 or the counterweight block 12.

Other Embodiments The following embodiment is also possible. (1) In the first embodiment, the case where the hoisting machine 2 is installed at the bottom of the hoistway 1 has been described.
Applies when installed at the top of the inside. (2) Similarly, shock absorbers 9 for baskets and counterweights,
Although 10 is shown as a spring type shock absorber, it is applied when a hydraulic shock absorber is used.

[0029]

As described above, according to the first aspect of the present invention, when the detection switch detects that the elevating body blocking table is not installed on the shock absorber during the maintenance operation, the second aspect of the present invention provides the second mode.
According to the present invention, when it is detected that the counterweight counter is not installed in the counterweight shock absorber, the maintenance operation is prevented, so that it is possible to prevent the operator from forgetting to install the counterweight.

According to the third aspect of the present invention, when the detection switch detects that the counterweight-prevention base is installed in the counterweight shock absorber during the maintenance operation, the landing call is insensitive and the vehicle is moved to the top floor. Since the automatic driving is prevented, it is possible to prevent landing calls that are unnecessary for maintenance operation, and it is possible to prevent unnecessary entry into the counterweight shock absorber. In addition, it is possible to prevent forgetting to remove the counterweight prevention block at the end of the work.

According to the fourth aspect of the present invention, when the detection switch detects that the car block is not installed in the car shock absorber during the maintenance operation, the maintenance operation is prevented. It is possible to prevent forgetting.

According to the fifth aspect of the present invention, if the detection switch detects that the car block is installed in the car shock absorber during the maintenance operation, it makes the hall call insensitive and prevents automatic operation to the top floor. As a result, it is possible to prevent a hall call unnecessary for maintenance operation and to prevent an unnecessary rush into the car shock absorber. In addition, it is possible to prevent forgetting to remove the car blocking stand at the end of the work.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view of a hoistway showing a first embodiment of the present invention.

FIG. 2 is a circuit diagram showing Embodiment 1 of the present invention.

[Explanation of symbols]

1 elevator hoistway, 2 hoisting machines, 3 cars (elevator), 5 weights (elevator), 9 cars buffer, 10 weights buffer, 11 car block, 12 weights Blocking platform, 13 Car blocking platform detecting switch, 14 Counterweight blocking platform detecting switch, 21
Cage block detection relay 21a-21c Cage block detection relay contact, 22 counterweight counterblock detection relay, 22a-22c counterweight counterblock detection relay contact, 23K up run button (on car), 23P up run button ( (Bottom of hoistway), 24K down operation button (on car), 24P down operation button (bottom of hoistway),
25 landing button, 26 microcomputer.

Claims (5)

[Claims] 1. A hoist that has a hoisting body that rises and lowers in a hoistway, a buffer for the hoisting body is installed at the bottom of the hoistway, and a lowering position of the hoisting body is limited to the buffer during maintenance operation. In the elevator in which the body block is installed, a block detection switch for detecting that the lift block is installed in the shock absorber is provided, and the block detection switch detects the installation of the lift block. A maintenance operation device for an elevator, comprising a maintenance operation inhibiting means for preventing the maintenance operation when the maintenance operation is not performed. 2. A maintenance operation by operating a car having a car and a counterweight that moves up and down in a hoistway, a counterweight for the counterweight for the counterweight is installed at the bottom of the hoistway. In the elevator where the counterweight block is installed in the counterweight buffer to limit the lowering position of the counterweight, the counterweight block is installed in the counterweight buffer. A counter for detecting a counterweight is provided. When the switch for detecting a counterweight block does not detect the installation of the counterweight counter, the maintenance operation by the operation on the car is prevented. A maintenance operation device for an elevator, comprising maintenance operation prevention means. 3. A hoistway and a car for lifting and lowering in the hoistway, a counterweight for the counterweight is installed at the bottom of the hoistway, and the buffer for the counterweight during maintenance operation is provided. In an elevator in which a counterweight block for restricting a lowering position of the counterweight is installed in a container, a counterweight detector for detecting that the counterweight block is installed in the counterweight buffer. When the above-mentioned counterweight prevention block detection switch detects the installation of the counterweight prevention block during normal operation automatically operated by a hall call, when the above-mentioned counterweight prevention block detection installation detects An elevator maintenance operation device comprising an automatic operation prevention means for preventing the automatic operation. 4. A car which has a car and a counterweight which moves up and down in the hoistway, a car shock absorber for the car is installed at the bottom of the hoistway, and the car is operated at the bottom of the hoistway during maintenance operation. In an elevator in which a car block for restricting the lowering position of the car is installed in the buffer for car, a car block detection switch for detecting that the car block is installed in the car buffer is provided. A maintenance operation device for an elevator, comprising: a maintenance operation preventing means for preventing a maintenance operation by operating at the bottom of the hoistway when the blocking block detection switch does not detect the installation of the car blocking block. 5. A car having a car that lifts and lowers in a hoistway and a counterweight, a car shock absorber for the car is installed at the bottom of the hoistway, and the car lowers on the car shock absorber during maintenance operation. In an elevator in which a car block for limiting the position is installed, a car block detection switch is provided to detect that the car block is installed in the car shock absorber, and during normal operation automatically operated by a hall call. When the car blocking stand detection switch detects the installation of the car blocking stand, the elevator is insensitive to the hall call and provided with automatic driving blocking means for blocking the automatic driving to the top floor. Maintenance operation equipment.