JPS6133792B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a device for detecting the position of an elevator car.

Conventionally, the simplest device for detecting the position of an elevator car is one in which a position switch is provided for each floor in the hoistway and these switches are sequentially operated by a cam attached to the car. This is because while the position of the car can be reliably detected by the cam as long as the position switch is operating, if the car is outside the operating range of the position switch, the position becomes unknown. Generally, an elevator control circuit is configured to compare a registered call with the position of the car, and issue a stop command when the car reaches the position where the call has been made. Therefore, while traveling, the car reaches the next floor before the required deceleration distance (the distance from when a stop command is issued until the car stops; this value changes depending on the elevator drive method and speed). We must detect its arrival.
However, as the speed of the car increases, the floor spacing and the operating range of the position switch no longer satisfy this condition, so it is used exclusively in low-speed elevators.

In addition, there is a device that detects the position of the car by providing a detection device in the car and attaching an element for operating the device at a desired position in the hoistway to obtain electrical pulse signals and counting the signals. This allows the user to freely decide when the position signal changes to the next floor during travel and does not have the disadvantages of the above-mentioned devices, so it is widely used in both low-speed and high-speed elevators. However, with this device, if the pulse count goes awry, the car position and car position signal will no longer match, so the car position must be accurately matched with the car position signal, and in the event of a disaster, the car can be moved to a predetermined floor. It cannot be applied to applications such as control that returns the signal.

This invention eliminates the above-mentioned drawbacks, and aims to provide an elevator position detection device that can accurately detect the position of a car throughout the hoistway and can be applied even when the speed of the car increases. .

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

In Fig. 1, 1A is a position switch for going down to the 1st floor installed in the position corresponding to the 1st floor in the hoistway, 2A is also a position switch for going down to the 2nd floor, and 2B is also a position switch for going down to the 2nd floor.
3B is a position switch for going up the 3rd floor; 5 is an elevator car; 6 is a position switch for the car 5;
This is a cam that sequentially operates A, 2B, 2A, and 3B. In addition, position switches 1A, 2B, 2A, 3B
are arranged in a straight line.

In Figure 2, 1AD, 2AD, 2BU, and 3BU are the operating ranges of position switches 1A, 2A, 2B, and 3B, respectively, A is a distance slightly longer than the required deceleration distance of car 5, and B is the overlap of range 1AD and range 2BU. range, C
is the polymerization range of range 2AD and range 3BU.

In Figure 3, 1CU to 3CU is the operating range of position detection relays 1C to 3C in Figure 4 when they rise, and 1CD to 3
Similarly, CD is the operating range when descending.

In Figure 4, (+) and (-) are DC power supplies, 1Aa, 2
Aa, 2Ba, and 3Ba are position switches 1A and 3Ba, respectively.
2A, 2B, 3B normally open contacts, 1C is the position detection relay on the 1st floor, 1Ca is its normally open contact, 1Cb, 1
Cc is also a normally closed contact, 2C is a position detection relay on the second floor, 2Ca is its normally open contact, 2Cb to 2Cd are also normally closed contacts, 3C is a position detection relay on the third floor,
3Ca is a normally open contact, 3Cb and 3Cc are also normally closed contacts, 7 is a switching relay, 7a and 7b are normally open contacts, 7c and 7d are normally closed contacts, and 8 is a normally closed contact when energized. It is a time-limited relay that is activated and returns immediately after being deenergized. 8a is its normally closed contact, and 9 is an up-travel relay contact that is closed when the car 5 is stopped and opened when it is ascending.

Next, the operation of this embodiment will be explained.

Assuming that the car 5 is now on the first floor, the first floor down position switch 1A is pushed by the cam 6 and the contact 1Aa is closed, as shown in FIG. Here, when the power (+) and (-) are turned on, (+)-9-8a-
The switching relay 7 is energized by the circuit 7-(-), the contacts 7a and 7b are closed, and the contacts 7c and 7d are opened. Now, (+)-1Aa-7a-1C-
(-) circuit, position detection relay 1C on the first floor
is energized and maintains itself by closing contact 1Ca. At the same time, contacts 1Cb and 1Cc are opened. Due to the opening of contact 1Cb, time relay 8 is not energized.

When the car 5 starts to rise, the up-travel relay 9
is opened, the switching relay 7 is deenergized, the contacts 7a and 7b are opened, and the contacts 7c and 7d are closed. Car 5 rises, and position switch 2 for going up to the 2nd floor is activated.
When B is pushed by cam 6, contact 2Ba closes,
By the circuit of (+)-2Ba-7c-2C-(-),
The position detection relay 2C on the second floor is energized and the contact 2
Ca is closed and contacts 2Cb to 2Cc are opened. When contact 2Cc is opened, position detection relay 1C on the first floor is deenergized, contact 1Ca is opened, and contacts 1Cb and 1Cc are
is closed. Now, the position detection relay 2C on the second floor
is self-maintained by the (+)-3Cc-1Cc-2Ca-2C-(-) circuit. When the car 5 rises and the cam 6 is removed from the first floor descending position switch 1A, the contact 1Aa opens. Further, when the second floor down position switch 2A is pushed by the cam 6, the contact 2Aa is closed. Subsequently, when the cam 6 is removed from the second floor up position switch 2B, the contact point 2Ba is opened. During this time, since the position detection relay 2C on the second floor is self-holding, no change occurs in the circuit. When the car 5 further rises and the third floor climbing position switch 3B is pushed by the cam 6, the contact 3Ba closes and (+)-3
The position detection relay 3C on the third floor is energized by the Ba-7d-3C(-)(-) circuit, the contact 3Ca is closed, and the contacts 3Cb and 3Cc are opened. Contact 3Cc
By opening, the position detection relay 2C on the second floor is deenergized, the contact 2Ca is opened, and the contacts 2Cb to 2Cd are closed. Now, the position detection relay 3C on the third floor is self-maintained by the (+)-2Cd-3Ca-3C-(-) circuit. Thereafter, similar operations are repeated. These 1st to 3rd floor position detection relays 1C to 3C
The operation is as shown in FIG.

When the car 5 stops due to a power outage, for example, in a position where the position switches 2B and 3B for going up to the 2nd and 3rd floors are not pressed by the cam 6, that is, between the operating range 2BU and the operating range 3BU, the power is turned off in this state. (+),
(-) has recovered, the second floor down position switch 2A is pushed by the cam 6, so the contact 2
Aa closes. With the same operation as when the car 5 was on the first floor, the switching relay 7 is energized and the contact 7b is closed, so the second floor position detection relay 2C is energized and the position of the second floor is detected. .

Next, car 5 is on the 3rd floor, power supply (+), (-)
When the switch is turned on, the switching relay 7 is energized and the contact 7d is opened. Therefore, even if the third floor up position switch contact 3Ba is closed, the third floor position detection relay 3C is not energized. Therefore, position detection relay contacts 1Cb to 3 on the 1st to 3rd floors
Cb is closed, the time relay 8 is energized, and the contact 8a is opened after a certain period of time. Now, switching relay 7
is deenergized and the contact 7d is closed, so the third floor position detection relay 3C is energized and self-held by closing the contact 3Ca, and the position of the third floor is detected. Moreover, since the time relay 8 is deenergized by opening the contact 3Cb and the contact 8a is closed, the switching relay 7 is reenergized. Since contact 9 is closed while car 5 is lowering, switching relay 7 is energized while car 5 is lowering, contacts 7a and 7b are closed, and contact 7 is closed.
c and 7d are open. The operation when the car 5 descends from the third floor can be easily understood from the explanation when it ascends, so a detailed explanation will be omitted. And 3
The operations of the position detection relays 3C to 1C on the first floor to the first floor are as shown in FIG.

Car 5 stops between operating range 2AD and operating range 1AD due to a power outage, etc., and in this state, the power supply (+),
When (-) recovers, the switching relay 7 is deenergized in the same manner as when the car 5 was on the third floor.
By the circuit of (+)-2Ba-7c-2C-(-),
The second floor position detection relay 2C is energized and the second floor position is detected.

Further, when the car 5 is stopped within the polymerization range C due to a power outage, the position switch contacts 2Aa and 3Ba for the second floor down and the third floor up are closed. Power supply (+),
(-) is restored, the switching relay 7 is energized,
Since the contact 7b is closed, the position of the second floor is detected. The same applies to the case within the polymerization range B, in which case 1
The floor position is detected.

In addition, the elevator is provided with a car limit switch and a cam for operating the switch at the end of the hoistway. Therefore, we replaced this cam with the above cam 6.
If it is shared with the cam, there is no need to add a new cam or secure space for installing the switch in the hoistway.

As explained above, in this invention, the up position switches and the down position switches are arranged so that their operating ranges overlap between adjacent floors, and in this overlapping range, the position switches in the running direction of the car are connected, and the position switches in the opposite direction are connected. When these position switches are activated, the corresponding position detection relays are activated to detect the position of the car, so the device configuration is simple and can be manufactured at low cost, and it is faster than before. A car position detection device capable of issuing an elevator stop command can be obtained.

In addition, when a power outage recovers, the position switch corresponding to the inner and lower floors of the position switch operating at that position is connected in the above polymerization range, and the corresponding position detection relay is activated, so that when a power outage occurs, The car position is maintained no matter where the car is, and the desired car position can be detected when power is restored.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the relationship between a position switch and a cam showing an embodiment of the elevator position detection device according to the present invention, FIG. 2 is an explanatory diagram of the operating range of the position switch of FIG. 1, and FIG. FIG. 4 is a circuit diagram illustrating the operating range of the position detection relay. 1A...1st floor down position switch, 2A...2
Downstairs position switch, 2B...2nd floor up position switch, 3B...3rd floor up position switch, 1
C~3C...1st floor~3rd floor position detection relay, 5...
...Cage, 6...Cam, 7...Switching relay, 8...
Timed relay, 9... Upward running relay contact. In addition,
Identical parts in the figures are indicated by the same reference numerals.

Claims (1)

[Scope of Claims] 1. A car with an up car and a down car, which are arranged in the hoistway corresponding to each floor, and operate when the car reaches the required deceleration distance of the car from each floor, and in the same direction. are arranged without overlapping with each other, and those in different directions are position switches arranged with overlapping ranges that operate together between adjacent floors, and in the non-overlapping range, connect position switches corresponding to the running direction of the car. However, in the above overlap range, even if both the upward and downward directions of the position switch operate, a switching relay is provided for each floor that connects the position switch corresponding to the running direction of the car and disconnects the position switch in the opposite direction. The position of the elevator is provided with a position detection relay that detects and holds the next floor when the position switch in the direction to which the changeover relay is connected is operated, and at the same time releases the previously held detection of the previous floor. Detection device. 2.It has an up and down car and is arranged in the hoistway corresponding to each floor, and operates when the car reaches the required deceleration distance of the car from each floor, and those in the same direction do not overlap each other. Those arranged in different directions are position switches arranged with overlapping ranges that operate together between adjacent floors, timed relays that operate after a certain period of time from the point of power recovery,
In the non-overlapping range, connect the position switch corresponding to the running direction of the car, and in the overlapping range, connect the position switch corresponding to the running direction of the car even if both the up and down position switches operate. Then, in addition to disconnecting the position switch in the opposite direction, the position switch, which is operating at that position in the non-polymerization range, is connected, and the position switch, which is operating at that position in the polymerization range, is connected until the time relay operates when the power is restored. A switching relay that connects the position switch corresponding to the inner and lower floor of the operating position switch, which is provided corresponding to each floor, and when the position switch in the direction to which the switching relay is connected operates, the next floor is detected and held. A position detection device for an elevator comprising a position detection relay that simultaneously cancels the previously held detection of the previous floor and detects the floor to which the switching relay is connected when the power outage is restored.