JPS6128592B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention solves the problem of any abnormality between a guide shoe fixed to an elevator lifting body and a guide rail that guides the lifting body via this guide shoe.
The present invention relates to an elevator control device that stops the elevating and lowering of an elevating body when a guide shoe detaches from a guide rail, for example.

When a building in which an elevator is installed shakes due to vibrations caused by an earthquake or wind pressure caused by a typhoon, etc., depending on the severity of the shaking, the elevator car or a lifting object such as a counterweight may detach from the guide rail along with the guide shoe. Something like this happens. If this is left as is, there is a risk of a major accident such as a collision between the car and the counterweight when they pass each other, and the elevator will need to be brought to an emergency stop.

Conventionally, in order to prevent such accidents, a relative displacement detection device was installed close to the guide shoe to detect changes in the relative position between the guide shoe and the guide rail, and when the amount of relative displacement exceeds a predetermined value, the guide shoe When the elevator was removed, the output signal from the relative displacement detection device was transmitted via a control cable to a control device installed in the machine room, which stopped the elevator. However, such conventional devices have the following drawbacks.

(1) A relative displacement detection device is required for each guide shoe, and therefore, four relative displacement detection devices are required for one counterweight, which increases the cost.

(2) In elevators, the guide show disengagement mainly occurs in the counterweight, but there is little space in the hoistway, and it is often difficult to suspend the control cable.

(3) If the elevator travel is long, the control cable itself may shake due to an earthquake and come into contact with equipment in the hoistway, potentially causing malfunction.

The purpose of this generation is to improve the above-mentioned drawbacks, and the guide sensor is used to detect vibrations or noise caused by sliding or rolling (as rollers are used in high-speed elevators) between the guide show and the guide rail. This invention provides an elevator control device that is installed on the rail side and stops the elevator based on the output signal of the sensor.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 4. In the figure, 1 is a counterweight, 2 is a guide shoe fixed to the top, bottom, and both sides of the counterweight 1, 3 is a guide rail that fits into the guide shoe 2 and guides the lifting and lowering of the counterweight 1, and 4 is a guide rail for suspending the counterweight 1. 5 is a vibration sensor attached to the upper end of the guide rail 3, 6 is a control cable that transmits the output signal of the vibration sensor to a control device (not shown) in the machine room, and 7 is a machine room. floor. FIG. 2 is a block diagram showing a signal transmission path between devices, in which 8 is a vibration upper and lower limit setting device, and 9 is a vibration upper and lower limit setting device 8 that converts the output signal Sx of the vibration sensor 6 into an upper limit setting signal. S _A and a comparison/discrimination device that compares and discriminates the lower limit setting signal S _B ; 10 is an operation continuation signal; 11 is an operation stop signal; 12 is an operation stop signal; and 13 is an elevator control device. 3 and 4 show the block diagram of FIG. 2 as a concrete circuit diagram, and 14 is a piezoelectric type acceleration detector connected to a power source 16 via a resistor 15, which detects the acceleration of vibration of the guide rail 3. The internal resistance is changed according to the output signal, and an output signal is generated. 17 is an amplifier that amplifies this output signal, 18 is a battery that is set to voltage B ₁ corresponding to the lower limit setting value (minimum allowable vibration value), 19 is a resistor,
20 is the electromagnetic coil of the lower limit relay, 21 is the reverse current roughening diode, and 22 is the voltage B ₂ (however, B ₂ > ₁ ) corresponding to the upper limit setting value (maximum allowable vibration value).
23 is a resistor, 24 is an electromagnetic coil 24a of the upper limit relay, a normally open contact for self-holding of the upper limit relay, 25 is a reverse current blocking diode,
26 is a normally closed push button switch for reset which is opened manually, and 27 is a power source for maintaining the self-holding circuit of the upper limit relay. FIG. 4 shows a circuit diagram for controlling the elevator control device through the operation of the lower limit relay and the lower limit relay, 28 is the power supply 20b that drives this control circuit, the normally closed contact of the lower limit relay, and 24b is the normally closed contact of the upper limit relay. It is a point of contact.

Next, the operation of the apparatus configured as above will be explained. Normally, the guide shoe 2 guided by the guide rail 3 is made of an elastic material such as rubber, and under normal operating conditions, the vibration frequency generated in the guide rail 3 is 10 to 500 Hz, and the acceleration is 30 ga or less. However, if the guide shoe 2 separates from the guide rail 3 due to abnormal vibrations of the building due to an earthquake, etc., the metal supporting the guide shoe 2 will come into direct contact with the guide rail 8, which will cause abnormal noise and vibrations between the metals. occurs. At this time, the frequency of vibration generated in the guide rail 3 is 1000 Hz or more, and the acceleration is 50 ga or more. In one embodiment of the present invention, an abnormal state is detected by the acceleration of vibration generated in the guide rail 3,
The magnitude is compared with the lower limit setting value and the upper limit setting value, and an instruction is given to the elevator control device 13 as a signal to continue operation, temporarily suspend operation, or stop operation. That is, the first
As shown in the figure, a vibration sensor 5 is attached to the upper end of the guide rail 3, and the vibration sensor 5 corresponds to the acceleration detector 14 shown in FIG. 3, and its output voltage is amplified by an amplifier 17. When the output voltage v of the amplifier 17 is lower than the lower limit set voltage _B1 of the battery 18, no current flows through the electromagnetic coil 20 of the lower limit relay, and therefore the lower limit relay does not operate. In this case, the normally closed contacts 20b and 24b of the lower limit relay and the upper limit relay remain closed. As a result, a signal to continue operation is transmitted to the control device 13, and the elevator continues to operate. The output voltage V of the amplifier 17 is the lower limit setting voltage B ₁
If the output voltage V exceeds the lower limit setting voltage
By overcoming _B1 , a closed circuit of diode 21, electromagnetic coil 20, resistor 19, battery 18, and amplifier 17 is formed, and the lower limit relay operates. the result,
The normally closed contact 20b of the lower limit relay of the control circuit is opened, a signal to stop operation is transmitted to the control device 13, and the elevator immediately stops operating. In this state, the output voltage V of the amplifier 17 is lower limit set voltage B ₁
The energization of the electromagnetic coil 20 continues as long as V<B ₁ , but the normally closed contact 20b of the control circuit is closed again, and a signal to resume operation is transmitted to the control device 13. Ru. When the output voltage V of the amplifier 17 exceeds the upper limit set voltage B ₂ , the output voltage V overcomes the upper limit set voltage B ₂ and is connected to the diode 21 , the diode 25 , the electromagnetic coil 24 of the upper limit relay, the resistor 23 , the battery 22 , A closed circuit of amplifier 17 is formed and the upper limit relay is activated. the result,
The normally closed contact 24a of the upper limit relay is closed, the electromagnetic coil 24 is further energized by the power source 27, and the upper limit relay is self-maintained in this state. On the other hand, in the control circuit shown in FIG. 4, the electromagnetic coil 24b is opened by the energization of the upper limit relay, and in this state, the output voltage V of the amplifier 17 is the upper limit setting voltage.
Since it continues even if it becomes lower than _B2 , it is transmitted to the control device 13 as a signal to stop operation. When it is confirmed that the guide shoe 2 has returned to its normal state of separation from the guide rail 3 and is ready for operation, the reset normally closed push button switch 26 is manually opened and the energization of the upper limit relay is released. By doing so, the normally closed contact 24b of the open upper limit relay is closed, and a signal for restarting operation is transmitted to the control device 13.

5 and 6 respectively show other embodiments of the present invention. In the figures, the same reference numerals as in FIG. 1 indicate the same or corresponding parts, and in FIG. 5,
Reference numeral 29 denotes a connecting member that connects the upper ends of the guide rails 3, and the vibration sensor 5 is attached to this connecting member 29, so that the number of vibration sensors 5 installed can be reduced. In FIG. 6, reference numeral 30 denotes a support member whose upper end protrudes into the machine room;
0 is fixed to the connecting member 29. By attaching the vibration sensor 5 to the upper end of the support member 30, maintenance and inspection of the vibration sensor 5 can be facilitated.

As described above, when the guide shoe separates from the guide rail 3, abnormal vibrations and abnormal noise are generated. Therefore, instead of sensing abnormal vibrations, abnormal noise may be sensed. 7 and 8 show another embodiment of the present invention in which a noise sensor 31 is used instead of the vibration sensor 5, and the same reference numerals as in FIGS. 1 and 5 indicate the same or corresponding parts. show.

As described above, this invention detects the vibration or noise generated between the guide shoe and the guide rail using a sensor installed on the guide rail, determines whether to continue operation or stop, and controls the elevator. This prevents the spread of accidents caused by the guide shoe coming off the guide rail, and improves driving safety.Moreover, since the sensor is installed on the guide rail side, that is, on the fixed side, the sensor and machine Control cables that connect indoor control devices can be easily placed without being affected by the spatial clearance of the hoistway or the length of the hoistway. It is possible to provide a simple and economical elevator control device, since there is no risk of malfunction due to contact with equipment inside the elevator.

[Brief explanation of the drawing]

Figures 1 to 4 show an embodiment of this invention, with Figure 1 being a front view showing how the vibration sensor is installed, Figure 2 being a block diagram of the embodiment, Figures 3 and 4. FIG. 4 is a circuit diagram of one embodiment, and FIGS. 5 to 8 are front views showing other embodiments. In the figures, the same reference numerals indicate the same or equivalent parts, 1 is a counterweight, 2 is a guide shoe,
3 is a guide rail, 5 is a vibration sensor, 10 is an operation continuation signal, 11 is an operation stop signal, 12 is an operation stop signal, 29 is a connecting member, 30 is a support member, and 31 is a noise sensor.

Claims (1)

[Scope of Claims] 1. An elevator comprising an elevating body, a guide shoe fixed to the elevating body, and a guide rail that guides the elevating body via the guide shoe, the guide shoe and the guide rail that guides the elevating body. A sensor is installed on the guide rail side to detect vibration or noise between the two, and the output signal of the sensor is compared with a preset lower limit voltage and upper limit voltage, and when the output signal is less than the lower limit voltage, In order to continue operation, a determination section is provided that determines that the operation will be temporarily stopped when the lower limit set voltage is higher than the upper limit set voltage, and that operation is stopped when the upper limit set voltage is higher than the upper limit set voltage, and the elevator is further controlled according to the determination result of the above discriminator. What is claimed is: 1. An elevator control device comprising: a control section for controlling an elevator; 2. The elevator control device according to claim 1, wherein the sensor is attached to a connecting member that connects the guide rails. 3. The elevator control device according to claim 1, wherein the connecting member has a support member that projects into the machine room, and a sensor is attached to the end of the support member that projects into the machine room.