JPH0669873B2 - View elevator speed switching device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a speed switching device suitable for a prospective elevator.

<Prior Art> A passenger elevator installed in a high-rise building and serving each floor generally operates normally and operates at a speed of 60 to 90 m / min.

On the other hand, the observation elevator installed in department stores, etc., where the side of the car is transparent and configured to overlook the outdoor scenery, the above-mentioned It operates at a speed lower than the speed of normal normal operation.

It relates to a prospective elevator equipped with a speed switching device and is disclosed in, for example, Japanese Patent Laid-Open No. 56-149959. The present invention provides an elevator with a device that detects a car load, a hall call, and a car call, and automatically changes the speed according to the output of the car. When the car load is small or the number of users is low, the speed is low. It is operated at high speed when the car load is large or there are many users.

<Problems to be Solved by the Invention> However, the above-mentioned conventional elevator for prospecting has the following problems.
For example, even when there are no passengers in the car, if the hall calls are few, the elevator will run at low speed.
Therefore, the customer waiting for the elevator at the hall has to wait for a long time, which causes a problem in driving efficiency.

Further, even if the passenger wants to enjoy the scenery outside, the conventional example described above switches to high-speed operation by automatic control as long as the car load is large. If you ignore the passengers' intentions and drive at high speed because there are many passengers, it cannot be said that the original purpose of the elevator for observation is achieved.

In addition, a speed control device that responds to the number of calls, for example, when there are a small number of passengers in the car and low speed operation is performed, if a large number of hall calls suddenly occur, the running speed of the car suddenly increases. There is a safety problem for passengers in the car.

An object of the present invention is to improve the service of allowing passengers to enjoy the outside scenery while maintaining the operation efficiency of the elevator by changing the speed of the elevator according to the situation at that time and the intention of the passenger. Another object of the present invention is to provide a speed switching device for a prospective elevator that does not suddenly change its speed while traveling.

<Means for Solving the Problems> In order to achieve the above-mentioned object, the present invention is for an outlook that is constructed so that the outdoors can be viewed from the inside of a car that moves up and down, and is operated at a speed lower than the normal operating speed of a general elevator. In the elevator, the car has a speed selection device that can change the steady traveling speed of the car, and a speed switching device for operating the speed selection device is provided in the car, and the speed switching device is used while the car is traveling. Has a safety feature that disables it.

<Operation> With the above-described configuration of the present invention, the speed selecting device for the elevator can be easily operated in the car, so that the driver can switch the speed of the elevator according to the intention of the passenger in the car. Further, since the speed switching device does not operate while the car is traveling, the speed does not suddenly change while the car is traveling.

<Example> Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 shows an overall circuit diagram according to an embodiment of the present invention. A word Leonard device composed of a DC generator G and a DC motor M is formed, and a sheave S is attached to the DC motor M.
Connect directly to. A cage Cg and a counterweight Cw are attached to one end of the sheave S via a rope Rp. The DC generator G and the DC motor M have field coils Gf and Gm, respectively.
Is installed in the field coil Gf of the generator.
The speed setting circuit Gs is connected via Gg.

By supplying a constant current to the field coil Gm of the motor and a predetermined current to the field coil Gf of the generator, a voltage is generated in the armature of the DC generator G, and the DC motor M and the sheave S are generated.
And rotate simultaneously, and the car Cg runs through the rope Rp.

The speed setting circuit Gs consists of a DC power source E and resistors R ₁ , R ₂ , R ₃ and R ₄
And the series combined resistance R are connected in series. R ₁ and R _2, R ₂ and R _3, R ₃ and the contact B ₃ a ₂ relay between each of _{R 4, B 2 a 2,} B 1 a 2 is connected, by the respective closed , The maximum speed of the car is, for example, 30m / min, 60m
/ Min and 90m / min.

The speed generation circuit Gg has a constant value when its output current increases linearly and reaches a predetermined speed when any of the contacts B ₁ a _{2 to} B ₃ a ₂ of the speed setting circuit Gs is closed, and then the above-mentioned When the energized contact opens, on the contrary, it decreases linearly and at a specified speed, for example 5 m.
It is a circuit that generates a speed command so that the speed becomes a constant value again when / min is reached.

FIG. 3 is a signal circuit diagram for giving a signal to the speed setting circuit Gs.

Between the DC power supply terminals P and N, there is a speed switching switch SW which is a speed control means provided in the car, and constitutes a circuit in which the relays A _{1 to} A ₃ can be selected. The speed switching switch SW has terminals SW _{1 to} SW ₃ for energizing one of the relays A _{1 to} A ₃ . In addition, an a-contact ST of a relay (not shown) that is energized from the start of the car until the car reaches the destination floor.
a ₁ , STa ₂ and b contact that opens when the car starts decelerating to the destination floor
Relays B _{1 to} B ₃ each having a self-holding circuit are connected in parallel via SPb. Each of the relays B _{1 to} B ₃ is not b
It also has a circuit in which a contact and one a contact of relays A _{1 to} A ₃ are connected in series.

Next, the operation of the present invention will be described using the time chart of the output waveform of the speed generating circuit Gg shown in FIG.

Now that the outdoor scenery is good, we will run at a minimum speed of 30 m / min, and describe the case where the speed switch SW is switched to contact SW ₁ . That is, P-SW ₁ -A ₁
-N circuit is constructed and relay A ₁ is energized. When a start command is given to the car, the contacts STa ₁ , STa ₂ are closed, so a circuit of P-STa ₂ -SPb-A ₁ a-B ₂ b ₂ -B ₃ b ₁ -B ₁ -N is formed. Relay B ₁ is energized and self-held by contacts B ₁ a ₁ . Therefore, the contact B ₁ a ₂ in the speed setting circuit Gs is energized to supply a current to the field coil Gf of the generator by the action of the speed generating circuit Gg.

That is, the car accelerates from time t ₁ and when the speed reaches 30 m / min, the car runs steadily at time t ₂ . Then, when the predetermined position is reached, the contact SPb that has been energized at time t ₃ opens, so that the relay B ₁ is also deenergized. Therefore, the resistance value of the series combined resistance R becomes R ₁ + R ₂ + R ₃ + R ₄ , and the output current decreases linearly. And low speed 5m / min at time t ₄
Then, the steady operation is started, and when the predetermined position is reached, the contact STa ₁ opens at time t ₅ , and the car Cg stops.

Next, when there is no passenger in the car and there is a hall call, the speed changeover switch SW is connected to the contact SW ₃ in order to drive at a high speed so that the driver can quickly land on the target floor. In the same manner as the above-mentioned operation, the relay A ₃ is energized, the series combined resistance R of the speed setting circuit Gs becomes R ₁ , and the car can travel at a high speed of 90 m / min. During traveling, even if the contact SW ₁ is switched to SW ₂ by the driver's erroneous operation, the contact B ₁ b ₁ is open, so the relay B ₂ is not energized.

In this way, by operating the speed command means provided in the car, the above-mentioned speed switching device can be operated and the operating speed of the car can be adjusted.

In the present embodiment, the word Leonard device including the DC generator G and the DC motor M is used in the control circuit, but instead of the generator G, a static Leonard device using a thyristor is used, or an induction motor is used. The same effect can be obtained by using a device that is variably controlled by an inverter.

<Effects of the Invention> As described above, according to the present invention, the driver can switch the traveling speed of the elevator according to the intention of the passenger in the car by providing the speed switching device in the car of the prospective elevator. It will be possible to operate the elevator efficiently and improve the outlook service to passengers. Also,
Since the speed switching device does not operate while the car is running,
Passengers can be safely transported without sudden changes in speed while driving.

[Brief description of drawings]

FIG. 1 is an overall circuit diagram of a speed switching device for a prospective elevator according to an embodiment of the present invention, FIG. 2 is a time chart of an output current waveform of a speed generating circuit, and FIG. 3 is a signal circuit diagram. Cg: basket, Gs: speed setting circuit, Gg: speed generation circuit, R: series combined resistance, SW: speed command means.

Claims (1)

[Claims] Claims: 1. A view elevator that is configured to be able to look out from the inside of a car that moves up and down, and is operated at a speed lower than the normal operating speed of a general elevator. A speed selection that can change the steady running speed of the car. A device having a device, a speed switching means for operating the speed selection device in the car, and a safety function for disabling the speed switching device while the car is traveling are provided. Elevator speed switching device.