JPH0743102Y2 - Elevator maintenance operation equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a maintenance operation device for an elevator.

<Prior Art> It is necessary for safe driving that the elevator is stopped at a predetermined position by performing a preset deceleration operation on a so-called terminal floor on the uppermost floor and the lowermost floor.

If the deceleration and stop as described above are not performed, the counterweight collides with the buffer in the ascending operation of the car, and the car jumps toward the top of the hoistway due to the impact. In addition, when the car descends, the car collides with the buffer. Furthermore, in the case of a wind-up type elevator, the car collides with equipment installed at the top of the hoistway.

In this way, if the car does not perform the preset deceleration and stop operations at the terminal floor and the above-mentioned accident occurs, the passengers of the elevator are exposed to extremely dangerous situations.

Therefore, in order to prevent the occurrence of such an accident, JP-A-60
As disclosed in Japanese Patent No. 2583, a first limit switch and a first limit switch that operate when the car moves over a terminal floor for a predetermined distance to stop the car It is obligatory to provide a second limiting switch which is activated to stop the car when the car moves further beyond the aforementioned predetermined distance.

Therefore, in the conventional elevator, if the car moves a predetermined distance beyond the terminal floor for some reason, the first car
When the limit switch of No. 2 does not operate, the second limit switch operates, thereby opening the contactor of the hoisting motor circuit, driving the electromagnetic brake, and stopping the car emergency.
The safety of customers is secured.

Therefore, in the maintenance and inspection work of the elevator, it is a very important work item to confirm that the first and second limiting switches described above operate normally.

<Problems to be Solved by the Invention> In the above-described inspection work of the first and second limiting switches, the maintenance staff determines whether or not the respective limiting switches operate normally by the pressing operation. Or by entering the bottom of the hoistway and manually depressing these limiting switches.

However, the inspection work for confirming that the first and second limit switches normally operate due to the movement of the car has been quite complicated and troublesome.

That is, in order to move the car and inspect the first and second limit switches as described above, the elevator is put into the maintenance operation state, and the car is moved over the terminal floor by a predetermined distance. , Check that the first limit switch is activated and the car is stopped. Then, the maintenance person goes to the machine room to short-circuit the contacts of the first limit switch to make the first limit switch inoperative, and under this condition, moves the car over the terminal floor.

In that case, the car moves beyond the above-mentioned predetermined distance because the first limit switch is in the inoperative state.
Make sure that the relative positions of the second limit switch and the car are correct, and that this movement activates the second limit switch to stop the car.

Here, the maintenance personnel go to the machine room again and short-circuit the contacts of the second limiting switch to make the second limiting switch inoperative, and then restore the car to operate it at the other end floor. Perform the inspection work in exactly the same procedure.

In this way, after the inspection work on both end floors is completed, the maintenance personnel go to the machine room and release the short-circuiting of the contacts of the first and second limit switches, which have been done for the inspection work, for the first time. The inspection work of the first and second limit switches is completed.

As described above, the inspection work of the first and second limit switches is complicated, and the work time is lengthened and the inspection work cost is increased.

The present invention was made in view of the current state of elevator maintenance and inspection work as described above, and the purpose thereof is that maintenance personnel do not have to leave the car, and the car is actually moved by a simple operation. An object of the present invention is to provide an elevator maintenance operation device capable of performing maintenance and inspection work on the first and second limit switches in a closed state.

<Means for Solving Problems> In order to achieve the above-mentioned object, the present invention provides a maintenance operation device for an elevator, which operates when a car rises above a top floor for a predetermined distance to stop the car. A first limit switch on the floor side, a second limit switch on the top floor side that operates when the car further rises beyond the predetermined distance and stops the car, and the car moves to the bottom floor. The first limit switch on the lowermost floor side, which is activated when the car descends beyond a predetermined distance and stops, and the first limit switch which operates when the car further descends beyond the predetermined distance and stops the car. Control of an elevator equipped with a second limit switch on the lower floor side, a maintenance operation switch for switching the moving state of the car from a normal operation state to a maintenance operation state, and a relay operated by these switches And a first and a second switch that can be activated by mounting a key, and actuating the first switch prevents the operations of the first limit switch and the second switch. While enabling the car to move up and down while operating the second switch, the operation of the second limit switch and the first switch is blocked while the car moves up or down. A limit switch inspection device that enables the operation of the car, and a maintenance operation panel that is provided on the car and that allows maintenance personnel located on the car to detachably connect the limit switch inspection device during maintenance and inspection work. .

<Operation> In the maintenance and inspection work according to the present invention, the limited switch inspection device is attached to the operation panel of the car, and the maintenance operation switch is operated to put the car in the maintenance operation state. The operation of the first limit switch is blocked by attaching a key to the limit switch inspection device attached to the operation control panel to activate the key and operating the first switch to short-circuit the first limit switch.

In this state, the car is run in the maintenance operation state, and is moved further beyond a predetermined distance beyond the terminal floor at which the first limit switch is operated. This movement confirms that the relative positions of the second limit switch and the car are correct, and that the second limit switch operates to safely stop the car.

Next, the second switch of the limited switch inspection device is operated to short-circuit the second limited switch to prevent the operation of the second limited switch.

In this state, the car is returned to the return operation, and the car is moved to the position where the second limit switch is returned to complete the maintenance and inspection work of the second limit switch on one of the terminal floors.
The maintenance and inspection work of the first limit switch can be performed in a normal maintenance operation state.

By performing the same operation as above on the other terminal floor side, the maintenance and inspection work of the first and second limit switches can be performed by a simple operation performed by one maintenance worker without leaving the car. I can.

<Embodiment> An embodiment of the present invention will be described in detail below with reference to FIGS.

Here, FIG. 1 is a circuit diagram showing a configuration of an embodiment of the present invention,
FIG. 2 is a perspective view showing the structure of a limited switch inspection device according to the embodiment of the present invention, and FIG. 3 is a circuit connection diagram of the limited switch inspection device according to the embodiment of the present invention.

As shown in FIG. 1, a second limit switch FLS (U), a second limit switch FLS (D), between the DC power supply terminals P and N,
The first limit switch ULS, the ascending operation button UPB and the ascending operation relay 11 are connected in series.

Here, FLS (U) is a second limiting switch provided on the uppermost floor side, and FLS (D) is a second limiting switch provided on the lowermost floor side. ULS is a first limiting switch provided on the uppermost floor side.

Between the connection point between the second limit switch FLS (D) and the first limit switch ULS and the connection point 4 between the first limit switch ULS and the up operation button UPB, the contact point 43C ₁ and the contact point 43M are connected. ₁ ,
The switch SW ₃ and the first switch SW ₁ are connected in series.

Here, 43C ₁ and 43M ₁ are contacts of a maintenance operation relay 43C and an inspection device relay 43M, which will be described later, respectively.
₃ and the first switch SW ₁ are switches connected in the limited switch inspection device 18 as shown in FIG. The first switch SW ₁ is switchable to terminals 9 and 10, and the terminal 9 is connected to the connection point 4 described above.

A contact 43C ₂ , a contact 43M ₂ , a switch SW ₄ , a second switch SW ₂ , a first limit switch DLS, a descending operation button DNB, and a descending operation relay 12 are connected in series between the DC power supply terminals P and N. ing.

Here, the contacts 43C ₂ and 43M ₂ are contacts of the maintenance operation relay 43C and the inspection device relay 43M, respectively, and the switch SW
_{The fourth} switch SW ₂ and the second switch SW ₂ are switches connected in the limited switch inspection device 18, as shown in FIG. The first limited switch DLS is the first limited switch provided on the lowest floor side.

The connection point between the second limiting switch FLS (D) and the first limiting switch ULS described above, the second limiting switch SW ₂ and the first limiting switch SWS.
And the connection point 6 with the limiting switch DLS of (3) are connected to each other. Similarly, the connection point 5 between the first limit switch DLS and the descending operation button DNB is connected to the terminal 10 of the first switch SW ₁ .

Similarly, the limit switch inspection device 18 and the inspection device relay 43M are connected in series between the DC power supply terminals P and N. In addition, the maintenance operation switch is connected between the DC power supply terminals P and N.
SW ₅ and maintenance operation relay 43C are connected in series.

The limit switch inspection device 18 shown by the dotted line in FIG.
As shown in FIG. 2, the key groove 16 for the _first switch SW ₁ is housed in the case 13 and is formed on the upper surface of the case 13.
Alternatively, the key 15 is mounted in the key groove 17 for the _second switch SW _{2 so} that the second switch SW ₂ can be operated.

The limit switch inspection device 18 can be attached to the operation control panel by mounting the plug 14 on the socket of the operation control panel (not shown).

As described above, the plug of the limit switch inspection device 18
When 14 is attached to the socket of the operation panel, the terminals 1t to 7t shown in FIG. 3 are connected to the connection points 1 to 7 of the circuit shown in FIG. The switch inspection device 18 is in a mounted state as shown in FIG.

Further, in the limit switch inspection device 18, when the key 15 is mounted in the key groove 16 of the first switch SW ₁ , the switch S
W ₄ is turned off, and the key 15 is set to the keyway 17 of the second switch SW _2.
The switch SW ₃ is turned off when it is attached to.

The operation of the embodiment of the present invention having the above-described structure will be described below.

During maintenance work of the elevator, when a maintenance person located on the car attaches the plug 14 of the limit switch inspection device 18 to the socket of the operation panel of the car, the circuit shown in FIG. 1 is constructed. .

First, the first and second limit switches ULS and F on the top floor side
Assuming that maintenance and inspection work is performed on the LS (U), simply holding the key 15 in the key groove 16 will hold it in the neutral position,
Switch the maintenance operation switch SW ₅ to the maintenance side.

By switching the maintenance operation switch SW ₅ , the maintenance operation relay 43C is energized, so that the contacts 43C ₁ and 43C ₂ are turned on. In addition, by installing the limit switch inspection device 18, as shown in FIG. 3, connection points 1 and 2 in FIG.
The switches SW ₄ are turned off by connecting the keys to each other and mounting the key 15 in the key groove 16.

For this reason, the inspection device relay 43M is energized, so that the contacts 43M ₁ and 43M ₂ are turned ON.

Next, by operating the ascending operation button UPB to cause the car to perform the ascending maintenance operation, and the car moves over the terminal floor for a predetermined distance, so that the first limit switch ULS operates and the car reaches the predetermined car. Make sure to stop in position.

Here, by switching the key 15, the first switch
The terminal 8 and terminal 9 of SW ₁ are connected to each other, and the elevator car is operated for maintenance up while the operation of the first limiting switch ULS is blocked. By this ascending maintenance operation, the car is moved beyond the stop position by the first limit switch ULS described above, and it is confirmed that the second limit switch FLS (U) operates to stop the car at the predetermined position. .

Next, the key 15 is removed from the key groove 16 and attached to the key groove 17.

By this installation, switch SW ₃ is turned off and the switch
SW ₄ turns on. By operating the second switch SW ₂ in this state, the operation of the second limit switch FLS (U) is blocked, and the descending operation button DNB is operated, thereby terminating the top floor of the car. When it is moved down from the floor, the second limiting switch FLS (U) returns. Where key 15
When the key is removed from the key groove 17 and mounted in the key groove 16 and the key 15 is held in the neutral position, the condition before the maintenance and inspection work of the first and second limit switches ULS and FLS (U) on the uppermost floor side is maintained. Return.

Next, the first and second limiting switches DLS and F on the bottom floor side
Maintenance and inspection work for LS (D) is performed.

With the key 15 held in the neutral position, the descending operation button DNB is operated to cause the car to perform the descending maintenance operation, and the car moves a predetermined distance beyond the terminal floor, whereby the first limit switch Make sure that the DLS operates and the car stops in place.

Here, by switching the key 15, the first switch
The terminal 8 and the terminal 10 of SW ₁ are connected, and the operation of the car is lowered and maintained while the operation of the first limiting switch DLS is blocked. By this descent maintenance operation, the car is moved beyond the stop position by the first limit switch DLS, and the second limit switch FLS (D) is activated to stop the car at a predetermined position. To confirm.

Next, the key 15 is removed from the key groove 16 and attached to the key groove 17.

By operating the second switch SW ₂ in this state, the operation of the second limit switch FLS (D) is blocked, and the ascending operation button UPB is operated to move the car to the bottom floor. When you move up from the last floor, the second limit switch FL
S (D) returns.

In this way, the first and second limit switches ULS, DLS and FLS (U), FLS on the uppermost floor side and the lowermost floor side are
By attaching the maintenance / inspection work of (D) to the operation control panel of the limited switch inspection device 18, it becomes possible to easily and quickly perform switching between the _first and _second switches SW ₁ and SW ₂ .

Also, if the key 15 is installed in the key groove 16, the switch SW ₄ will be turned off without fail. Therefore, during inspection work on the top floor,
Even if the switch SW ₁ is operated incorrectly and the lift operation button UPB is pressed by mistake, if the second limit switch FLS (U) is operating normally, the car will not rise any further and safety is maintained. It First switch SW during inspection work on the bottom floor side
_{The same} applies to the case of erroneous operation of ₁ and the descending operation button DNB, and if the second limiting switch FLS (D) is operating normally, the car cannot be lowered any further and safety is maintained.

<Effects of the Invention> As described in detail above, according to the present invention, maintenance and inspection work for the first and second limit switches respectively set on both the uppermost floor side and the lowermost floor side of the elevator, and the elevator. Maintenance work for other devices provided in the ascending path can be performed continuously by one maintenance person without leaving the top of the car. It is possible to reduce the number of personnel, the burden on maintenance staff, the work time, and the inspection work cost. In addition, according to the present invention, when the first switch is operated, the second limit switch is surely operated by blocking the operation of the second switch as well as the first limit switch. As long as the second limit switch is normal, the car does not run over the second limit switch and the elevator maintenance work can be performed safely.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing a configuration of an embodiment of the present invention, FIG. 2 is a perspective view showing a configuration of a limit switch inspection device in the embodiment of the present invention, and FIG. 3 is a limit switch inspection in the embodiment of the present invention. It is a circuit connection diagram of operation. 1-7 ... Connection points, 8-10 ... Terminals, 11 ... Ascending operation relays, 12 ... Descent operation relays, 13 ... Case, 14 ...
… Plug, 15 …… Key, 16,17 …… Keyway, 18 …… Limit switch inspection device, 43M …… Inspection device relay, 43C …… Maintenance operation relay, ULS, DLS …… First limit switch, FLS
(U), FLS (D) ...... second limit switch, UPB ...... increasing operation for buttons, DNB ...... lowering operation for buttons, SW ₁ ...... first switch, SW ₂ ...... second switch, SW ₅ ...... Maintenance operation switch.

Claims (1)

[Scope of utility model registration request] 1. A first limit switch on the uppermost floor side which is activated when the car rises above the top floor for a predetermined distance and stops the car, and when the car further rises beyond the predetermined distance. A second limit switch on the top floor that operates to stop the car, and a first limit switch on the bottom floor that operates to stop the car when the car descends a predetermined distance beyond the bottom floor. A limit switch, a second limit switch on the bottom floor side that operates to stop the car when the car further descends beyond the predetermined distance, and the moving state of the car from the normal operating state is maintained. An elevator control circuit having a maintenance operation switch for switching to an operation state, a relay operated by these switches, and first and second switches that can be operated by mounting a key, By operating the first switch to prevent the operations of the first limit switch and the second switch from rising and lowering the car, and by operating the second switch. A limit switch inspecting device for preventing the operation of the second limit switch and the first switch so as to raise or lower the car, and a car top mounted on the car for maintenance and inspection work. A maintenance operation device for an elevator, characterized in that a maintenance worker located at (1) comprises an operation control panel to which the limit switch inspection device is detachably connected.