JPS6093079A - Terminal-stair protective device for elevator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

TECHNICAL FIELD OF THE INVENTION This invention relates to an improvement in a device for protecting an elevator car at a terminal floor.

[Prior art]

The speed of the elevator car is controlled according to the speed command value, but at the terminal floor, in order to protect the speed command value, a terminal floor deceleration command value is issued as shown in, for example, Japanese Patent Application Laid-Open No. 58-135075. It is now possible to This is shown in FIGS. 1 and 2.

In the figure, (1) is a speed command device that issues a normal speed command value ■, and (2) is a speed command value v1. and terminal deceleration command value 'V,
A selection circuit that selects the smaller of (described later).

(3) is a transmission circuit that transmits the output of the selection circuit (2) to the speed control device, and (4) compares the output of the transmission circuit (3) with the speed signal vt (described later) and outputs a speed control signal. A speed control device (5) is a thyristor converter constituted by a thyristor and whose output voltage is controlled by the speed control signal;
(6) is the armature of the hoisting DC motor connected to the thyristor converter (5), and (7) is directly connected to the armature (0) to supply the speed signal vt to the speed control bag device (4). The meter generator, (8) is the driving sheave of the hoisting rock driven by the armature (6), (9) is the deflection wheel, 00 is wound around the sheave (8) and the deflection wheel (9). Main rope, 0η is main rope 00
A basket connected to one end of , 0 is also a counterweight,
The cam fixed to (L[has] Kato 01), 0 is the top floor, QQ is the bottom floor, 0Q-(1) is placed corresponding to the top floor 0→, and when it engages with the cam 0, Termination detectors that operate sequentially, H~(C) are the termination detectors also placed corresponding to the lowest floor α0, and (A) is the termination floor deceleration command value v6 by the output of the termination detector 0Q-(C). This is a terminal deceleration command device that emits a signal.

That is, during normal running of car 01), as shown in FIG. 2) selects the speed command value ■ and transmits it to the speed control circuit (4) via the transmission circuit (3). This activates the thyristor converter (5) and applies voltage to the armature (6). with this,! The a-child (6) rotates, and the crane 01) runs via the sheave (8) and the main rope 011.

The speed of the car Ql) is detected by the speedometer generator (7),
The signal is fed back to the speed control device (4) as a speed signal vt, and the car A is controlled with high precision according to the speed command value ■.

While the car (11) is traveling towards the top floor α→, an abnormality occurs in the speed command device (1) and the car is moved to positions P, P2...P, where the end detector ae-m operates. 01) enters, if the speed command value ■1 does not decrease, IVp121
v becomes 1.

As a result, the 1 selection circuit (2) selects the terminal deceleration command value V, and the car (11) safely lands on the top floor 0 in accordance with the terminal deceleration command value 6. Similarly, when the car θ1) travels past the lowest floor θ11, it safely lands on the lowest floor 0υ. In this case, the positions P,, P2...P! in FIG. ,teeth,
The operating positions of the terminal detectors 0] to (to) are shown respectively.

In this way, near the terminal floor, safety is ensured by protecting the speed command value vp with the terminal deceleration command value 8. However, in the unlikely event that the selection circuit (2) or transmission circuit (3)
If the system is malfunctioning, even the protection you provide will be of no use.

[Summary of the invention]

This invention is intended to improve the above-mentioned problem, and the speed command value, the terminal deceleration command value, and the output of the terminal detector are input into a speed control device configured by an electronic computer, and the speed command value and the terminal deceleration command value are reduced. In addition to selecting gravity, safety near the terminal floor can be further improved by making it impossible to restart the car if the terminal deceleration command value exceeds a predetermined value even if the terminal detector operates. The purpose of the present invention is to provide a terminal floor protection device for an elevator.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 3 to 7.

FIG. 3 shows the overall configuration diagram, and shows the command value selection means (3A) that receives the output of the transmission circuit (3A) that transmits the speed command value vp and the output of the transmission circuit (3B) that transmits the terminal deceleration command value 8. 401), the speed command value vIl and the terminal deceleration command value v
8, whichever is lower. Next, a speed control signal is calculated by the speed control signal calculation means (402). In addition, activation prevention means (40
In 3), even if the end detectors (a) and (to) operate, if the end deceleration command value V exceeds a predetermined value, an output is issued and the speed control signal calculation means (402) is made inactive. Armature (6
) is configured to prevent restarts.

4 and 5 show the specific structure of the embodiment shown in FIG. 3. FIG. In the figure, (4) is composed of an electronic computer such as a microcomputer, and a central processing bag [(hereinafter referred to as optr) (
4A), a read-only memory (ROM) (4B) that stores programs and fixed value data, a read/write memory (RAM) (4C) that stores data such as calculation results, and a transmission circuit (3A) that is connected to the The input circuit (4D) that constitutes the converter for inputting the signal into the 0PU (4A), the input circuit (4B) also connected to the transmission circuit (3B),
The input circuit (41F) also connected to the termination detector (a) and (c) K, the input circuit (ω) also connected to the speedometer generator (7), and the thyristor converter (5). It has an output circuit (4H) that outputs the signal from op[r (4A) to the outside. Other than the above, the configuration is the same as in FIG. 1.

Next, the operation t% of this embodiment will be explained using the flow chart of the program operation shown in FIGS. 6 and 7.

In step 09, the speed command value V is input via the transmission circuit (3A). In the procedure (to), the terminal deceleration command value V is sent to the transmission circuit (
3B). Next, in step (to), the speed command value ■1 and the terminal deceleration command value VB are compared in magnitude, and IV,
If l<IV8+, select speed command value ■1 in step ■. If + v p l >"@', the terminal deceleration command value V is selected in the procedure (end). The speed control device (4) repeatedly calculates the above procedure at a predetermined period, and calculates the first It digitally calculates the same function as the selection circuit (2) shown in the figure, and also calculates a speed control signal based on the selected speed command value.

On the other hand, I read the output of the terminal detector (1) at step 0η,
Determine if it worked. If it does not work, read the output of the termination detector (c) in step (c) to determine whether it has worked. If the operation does not result in b, steps θ1) and (6) will be executed again in the next calculation cycle. When it is determined that the end detector (a) or the end detector (c) has operated in step (4℃, (c)), it is determined whether the absolute value IV, l of the end deceleration command value V8 is less than a predetermined value. If it is determined that the absolute value 1v81 of the terminal deceleration command value ■8 exceeds the predetermined value, the speed control device (4) is deactivated in step 1 and the armature ( 6) In other words, it is impossible to restart car 01J.In step θ1, the absolute value is 1■8
If it is determined that 1 exceeds the predetermined value.

This means that the terminal deceleration command device (c) or the transmission circuit (3B) is out of order.

In this way, the speed command device (1) or the transmission circuit (3
If A) fails, the terminal deceleration command value v[l can safely stop the terminal deceleration command value v[l] at the terminal floor, and if the terminal deceleration command device (A) or transmission device (3B) fails, , check the abnormality using the diagnostic program,
It is possible to ensure safety.

〔Effect of the invention〕

As mentioned above, in this building, the speed 1f system consists of 11 devices made up of electronic computers, inputs the speed command value, terminal deceleration command value, and the output of the terminal detector, and selects either the speed command value or the terminal deceleration command value. In addition to selecting the lower A, even if the termination detector operates, if the termination deceleration command value exceeds a predetermined value and reaches A, the car cannot be restarted.

This makes it possible to improve reliability by eliminating the need for a conventional selection circuit, and to further ensure safety when the car reaches the vicinity of the terminal floor.

[Brief explanation of drawings]

Figure 1 is a configuration diagram showing a conventional elevator terminal floor protection device, Figure 2 is a curve diagram of the speed command value and terminal deceleration command value shown in Figure 1 versus distance, and Figure 3 is a diagram showing the terminal floor of an elevator according to the present invention. Overall configuration diagram showing one embodiment of the protection device, No. 4
5 is a block diagram of the speed control device shown in FIG. 4, and FIGS. 6 and 7 are flowcharts of operations performed by the speed control device shown in FIG. 5. In the figure, (1) is a speed command device, (4) is a speed control device,
(5) is the thyristor converter, (6) is the armature of the hoisting DC motor, αD is the elevator car, 03 is the cam, α→
is the top floor, αQ is the bottom floor, (1) and (c) are the terminal detectors, (c) is the terminal deceleration command device, @ is the command value selection means, and 翹 is the activation prevention means. Note that the same reference numerals in the figures indicate the same or equivalent parts. Agent Masuo Oiwa Figure 1 Figure 15 Figure 2 Figure 3 Figure 4 Figure 4 Wa/f Figure 5 Sheep Figure 6 Figure 7

Claims (1)

[Claims] A speed command device that issues a speed command value that commands the rotational speed of the car drive motor, a termination detector that operates when the above-mentioned dowel approaches a terminal floor, and a terminal deceleration command device that issues a terminal deceleration command value by the operation of this termination detector. , and a speed control device configured by an electronic computer to control the rotational speed of the electric motor, and the speed command value, the terminal deceleration command value, and the output of the terminal detector are inputted to the control device, and the speed command value and terminal deceleration command value are input to the control device. command value selection means for selecting the lower one of the deceleration command values; and activation prevention means for making it impossible to restart the deceleration command if the terminal deceleration command value exceeds a predetermined value even if the terminal detector operates. A terminal floor protection device for elevators equipped with