JPS6338215Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a position correction device for aligning the car floor and the stop floor surface of a stop floor while a hydraulic elevator is stopped.

In general, hydraulic elevators require a device to compensate for fluctuations in car position due to hydraulic oil leaks and changes in hydraulic oil temperature.
As shown in Japanese Patent No. 47-27848, two types of control valves are provided, one for high speed and one for low speed, and the low speed control valve is used for position correction.

In such conventional devices, for some reason,
For example, if the control valve for position correction stops operating due to a solenoid disconnection, etc., it will not be able to compensate for fluctuations in the car position due to hydraulic oil leaks or changes in hydraulic oil temperature, and the car will be pushed down, making it impossible to operate. There was a fear that it would happen.

In particular, when a hydraulic elevator is installed in a cold region, the oil temperature rises during the day due to frequent use, and the oil temperature drops significantly at night. The reality is that the position of the car is corrected, and in such regions, if the control valve for position correction were to malfunction, it would lead to an extremely fatal situation.

The present invention was developed in view of this point, and even if the control valve for position correction fails and normal position correction operation is no longer possible, the car position can be corrected using the high-speed control valve. An object of the present invention is to provide a position correction device for a hydraulic elevator.

An embodiment of the present invention will be described below with reference to the drawings. Here, for the sake of simplicity, the case where the elevator stops on the fourth floor is described.

FIG. 1 is a piping system diagram of a hydraulic elevator, FIG. 2 is a car side view showing a car position detection device, and FIG. 3 is a circuit example diagram of a position correction device according to the present invention.
In the figure, 1 is a car that is raised and lowered by a hydraulic jack 2, 3 is a tank, 4 is a pump, 5 is an electric motor, 6 is a check valve, 7 is a high-speed ascent control valve, 8 is a low-speed ascent control valve, 9 is a control valve for high-speed descent, 10 is a control valve for low-speed descent, 11 and 12 are limit switches for floor alignment, and 13 is a cam provided in the tower, (+), (-)
is the power bus, LS1 is the normally open contact of the limit switch 11 that closes when the car 1 sinks more than a predetermined amount and the limit switch 11 contacts the cam 13, LS
2 is the normally open contact of the limit switch 12 which closes when the car 1 floats above a predetermined amount and the limit switch 12 contacts the cam 13, RYU is the ascending position correction command relay, RYUa and RYUb are the normally open contacts of the relay RYU, and RYD is the descending contact. position correction command relay,
RYDa, RYDb are the normally open contacts of relay RYD, UL is the solenoid of low-speed ascending control valve 8, DL is the solenoid of low-speed descending control valve 10, RYT is the activation delay relay, RYTa, RYTb is the activation delay relay RYT
, G is a means to notify the abnormality of the position correction device audibly such as voice, or visually such as a display, Ga is a notification device installed in the manager's room, etc. Normally open contact of notification device G,
1A to 4A are push buttons for registering in-car calls, 1C to 4C are car call relays for registering calls from inside the car to floors 1 to 4, and 1Ca to 4Ca and 1Cb to 4Cb are push buttons for relays 1C to 4C, respectively. Open contact, 1S1~4S
1, 1S2-4S2 and 1S3-4S3 are basket 1
Normally open contacts, R1 to R, of a floor selection relay (not shown) that closes when reaches the floor band of the 1st to 4th floors.
4 is a resistor, RY1a is a normally open contact of a deceleration command relay (not shown) which is energized when car 1 reaches the deceleration point and deenergized when car 1 reaches the floor;
FUa to 3FUa are normally open contacts of the ascending hall call relays (not shown) on the 1st to 3rd floors, 2FDa to 4FDa
is a normally open contact of a descending hall call relay (not shown) for the second to fourth floors; When ascending operation is selected, operating direction selection device X energizes ascending operation relay RYU1, and when descending operation is selected, operating direction selection device
RYD1 is energized and operation relay RYU1 or RYD1 is deenergized every time car 1 lands on the destination floor. If there is neither a car call nor a hall call, driving direction selection device X energizes relay RYA. RYU1a is the normally open contact of the upward operation relay RYU1, RYD1a is the normally open contact of the downward operation relay RYD1, RYAa and RYAb are the normally closed contacts of the relay RYA, UH is the solenoid of the high speed upward control valve 7,
DH is a solenoid for the high-speed lowering control valve 9.

Next, the operation of an embodiment of the present invention having the above-mentioned configuration will be explained separately for normal and abnormal conditions. However, for convenience of explanation, only the case where the car sinks will be described. The case where the car floats up is almost the same as the case where the car sinks and is easily understood, so the explanation will be omitted.

[If normal]

If neither a car call nor a hall call is registered and the stopped car 1 sinks as shown by arrow 21 due to a hydraulic oil leak, etc., and the limit switch 11 contacts the cam 13, the contact LS1 closes. normally closed contact RYAa of relay RYA (if all car calls and hall calls are not registered, relay RYA
is deenergized) to energize the ascending position correction command relay RYU, starting the electric motor 5, and energizing the solenoid UL of the low-speed ascending control valve 8 by closing the contact RYUa. When the electric motor 5 is started, the pump 4 is driven, and oil is sent out from the pump 4, but this oil is supplied to the hydraulic jack 2 through the check valve 6 by the action of the low speed increase control valve 8. Raise car 1 at low speed. Basket 1
When the car 1 rises by a predetermined amount, the limit switch 11 separates from the cam 13 and the contact LS1 opens, thereby deenergizing the rising position correction command relay RYU, stopping the electric motor 5 and stopping the car 1 in alignment with the floor.

If either a car call or a landing call is registered, even if car 1 sinks, it will be relayed.
Since the RYA contact RYAa is open, the ascending position correction command relay RYU is not energized.
By the operation of the well-known driving direction selection device
or descending operation relay RYD1, solenoid UH of high-speed ascending control valve 7 is energized.
Or the solenoid of control valve 9 for high-speed descending operation.
One of the DHs is excited to perform well-known hydraulic control operation.

[In case of abnormality]

Car 1, which is stopped due to hydraulic oil leakage, is indicated by arrow 2.
When the limit switch 11 descends and contacts the cam 13 as shown in 1, the contact point
LS1 closes and energizes the upward position correction command relay RYU through the normally closed contact RYAa of relay RYA,
While starting the electric motor 5, contacts RYUa and
By closing RYUb, solenoid UL of low speed increase control valve 8 is energized and power is supplied to operation delay relay RYT. Next, raise position correction command relay
If the above-mentioned position correction operation is not performed for some reason and the car 1 does not rise to the predetermined position (the position where the limit switch 11 separates from the cam 13) even after the RYU is energized and a predetermined period of time has elapsed,
The operation delay relay RYT is activated, and the contact RYTa is closed to activate the notification device G, and the contact Ga is self-held to notify the administrator of the failure, and the user is informed of the malfunction by closing the contact RYTb. Prevent elevators from becoming inoperable.

In other words, for the sake of explanation, if car 1 is currently on the first floor, contact RYTb has closed, so
A closed circuit of "(+)-RYTb-1S1-R2-2C-(-)" is generated, energizing the car call registration relay 2C on the second floor, and self-holding by closing the contact 2Ca.
When car call registration relay 2C is energized, contact 2
Since the contact 1S3 of the floor selection relay is closed through Cb, the driving direction selection device A well-known hydraulically controlled operation is carried out by the elevator car 1, and the car 1 is raised towards the second floor. When car 1 reaches the deceleration start point on the second floor, contact 2S2 of the second floor floor selection relay closes, and deceleration command relay contact RY1a also closes, so that "(+)-2Ca-R2-2S2-RY1a −
Relay 2C is short-circuited and de-energized by the ``(-)'' circuit, but the relay continues until car 1 lands on the second floor.
Since RYU1 remains energized, car 1 lands precisely on the second floor and is aligned with the second floor. Then, when relay 2C is deenergized and all calls disappear, car 1 remains on standby on the second floor.
If another call from an elevator user occurs, the elevator car continues to operate in response to the call. It is sufficient for the manager who has been notified of the failure by the notification device G to investigate the cause of the failure without panicking until there are no more users of the elevator. If the car waiting on the second floor is left for a long time and the car sinks on the second floor as well, as shown in the circuit shown in Figure 3, the call for the car on the third floor will be registered and the car will be sent to the third floor. Perform floor alignment on the floor.

In the above explanation, when an abnormality occurs, the elevator car is operated upward to align the floor with the adjacent floor above the elevator car, but conversely, the elevator car is operated downward and the floor is aligned with the floor below. It can also be easily done. Note that the floor to which the car call is registered is not particularly an adjacent floor, but may be any floor where there is no elevator car, but if it is an adjacent floor, it may be an elevator car that is used only to correct the position. movement can be suppressed to the necessary minimum. However, when it comes to the floor alignment on the farthest floor, the floor alignment will naturally be in the direction where there is no risk of the floor being pushed up or pushed down.

As explained above, according to the present invention, even if the car sinks or floats up for some reason in the unlikely event that the low-speed position correction device malfunctions, the operation control device using the normal high-speed control valve This allows automatic floor alignment to any floor, especially when pushing down an elevator car on the top floor or pushing up an elevator car on the bottom floor.
Since it can prevent the final limit switch from turning off and becoming inoperable, it is highly effective as a countermeasure against failures in hydraulic elevators, especially in cold regions. Furthermore, if a malfunction occurs in the low-speed position correction device, the supervisor is directly notified of the malfunction, so that the supervisor can assess the usage status of the elevator and repair the malfunction as appropriate.

[Brief explanation of the drawing]

FIG. 1 is a piping system diagram of a hydraulic elevator, FIG. 2 is a car side view showing a car position detection device, and FIG. 3 is an embodiment of the position correction device according to the present invention. 1... Car, 2... Hydraulic jack, 8, 10...
...Low speed control valve, 7, 9...High speed control valve, 1
1, 12...Limit switch, RYT...Operation delay relay, G...Notification device.

Claims (1)

[Claims for Utility Model Registration] (1) The hydraulic control circuit is equipped with two types of control valves, one for low speed and one for high speed, and when the car sinks or floats up by a predetermined amount while the elevator is stopped, the control valve for low speed In an elevator position correction device that supplies or discharges pressure oil to a hydraulic jack to align the car floor with the stop floor, if the car sinks or rises by a predetermined amount without car call registration. If the floor alignment is not completed even after a predetermined period of time has passed, an automatic car call registration device is provided that automatically registers the car call on the floor other than the floor where the car exists, and the automatic car call registration device registers the car call. A position correction device for a hydraulic elevator, characterized in that the car is operated by supplying or discharging pressure oil to the hydraulic jack only by the high-speed control valve. (2) The position correction device for a hydraulic elevator according to claim 1, wherein the car call of a floor other than the one where the car is present is a car call of an adjacent floor.