JPH10120328A - Weighing monitoring device of elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To maintain the extent of reliability in quickly grasping any malfunction in a weighting instrument even without increasing the frequency of a periodic inspection by comparing both the output results of two types of weighing instruments in time of the operation of an elevator, and when detection accuracy in at least one side of the weighing instruments goes down largely, making it output an abnormal communication signal. SOLUTION: A judging circuit 10 consists of a man power device 11, a judging device 12 and an abnormal signal output device 13. The man power device 11 is inputted with an analog signal 20 from a first weighing instrument 8, while a digital signal 21 is inputted from a second weighing instrument 9 and, after these signals 20 and 21 are converted into each of digital signals 22 and 23, they are outputted toward the judging device 12. When the first weighing instrument 9 operates and thereby the digital signal 23 is outputted, the judging device 12 judges an operating status in the second weighing instrument 9, and if it is not operated, an abnormal communication signal 24 is outputted from the abnormal signal output device 13, and thereby information is emitted to an external monitoring center, and communication takes place by sounding a buzzer in a car 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator scale monitoring apparatus used for maintaining the reliability of a scale apparatus installed for detecting a load.

[0002]

2. Description of the Related Art In an elevator, the amount of deflection of a vibration isolating rubber provided under the floor of a car is generally proportional to the load on the car, and the amount of deflection of the rubber is used as a differential value. A first weighing device that continuously detects the loaded load by using a transformer or the like; and a microswitch or the like that operates when the anti-vibration rubber is bent by a predetermined amount, so that the loaded load becomes a predetermined set load. And a second weighing device for detecting that the pressure has reached. Here, the first weighing device using a differential transformer or the like is mainly used to reduce a starting shock generated when starting the elevator, and the second weighing device using a microswitch or the like is It is mainly used as a safety device.
For example, a 110% weighing apparatus that operates when a weight of 100% is loaded is known.

If the detection accuracy of such an elevator weighing device is greatly reduced, a failure such as an inability to start the elevator or a serious accident may be caused. The weighing device was regularly inspected in order to check its operation and make adjustments.

However, in practice, there is a risk that the detection accuracy of the weighing device may be greatly reduced before the periodic inspection. Therefore, in order to maintain reliability, it is necessary to increase the frequency of the periodic inspection. A new problem arises in that the amount of work and maintenance costs for maintenance personnel increase significantly.

[0005] Therefore, as disclosed in Japanese Patent Application Laid-Open No. 6-255934, a first weighing device for continuously detecting the load in a car, and a method in which the load reaches a set load. A second weighing device that operates, calculates a difference between the detected value of the first weighing device and the set load when the second weighing device operates, and the difference exceeds a predetermined value. There has been proposed an elevator scale monitoring device including a comparison / determination unit that determines whether or not an error has occurred and an abnormality signal output unit that outputs an abnormality notification signal when the difference exceeds the predetermined value.

With this weighing monitoring device, when an abnormality notification signal is output from the abnormal signal output device based on the determination result of the comparison determining device, at least one of the first and second weighing devices is used. Since it can be determined that one of them has malfunctioned, the weighing device can be adjusted immediately even before the periodic inspection.

[0007]

By the way, in the above-mentioned conventional weighing monitor, the second weighing device uses the movement of a microswitch or the like to detect the movement, so that the contact of the microswitch or the like is hardly generated. Then, a failure may occur in which the contact is not closed even if the predetermined load is significantly exceeded. However, in the above-mentioned conventional balance monitoring device,
There was a problem that this point was not considered.

An object of the present invention has been made in view of the above-mentioned problems of the prior art, and it is an object of the present invention to easily perform the above-mentioned abnormal state even when an abnormal state in which the second weighing device does not operate due to a tightness or the like occurs. The present invention is to provide an elevator weighing monitoring device capable of quickly detecting a malfunction of the weighing device.

[0009]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a first weighing apparatus for continuously detecting a load in a car, and a first weighing device which operates when the load reaches a set load. A second weighing device, and calculates a difference between the detected value of the first weighing device and the set load when the second weighing device operates, and determines whether the difference exceeds a predetermined value. And an abnormality signal output means for outputting an abnormality notification signal when the difference exceeds the predetermined value, wherein the first weighing device has the set load. Means for detecting that a predetermined value greater than a predetermined value has been exceeded, and means for outputting an abnormality notification signal when the detection means operates and the second weighing device is not operating. Achieved.

Therefore, even if an abnormal condition occurs in which the second weighing device provided with the above-described components does not operate due to congestion or the like, the abnormal condition can be easily detected.
Even before the periodic inspection, the adjustment of the weighing device can be performed immediately.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. Here, FIG. 1 is an explanatory diagram showing the overall configuration of the balance monitoring device according to the embodiment together with the scale device to be monitored, and FIG. 2 is a flowchart for explaining the operation of the balance monitoring device shown in FIG.

In FIG. 1, reference numeral 1 denotes a car, 2 denotes a frame supporting the car 1, 3 denotes a floor of the car 1, and 4 denotes a guard provided between the frame 2 and the floor 3. Vibration rubber 5 is a differential transformer for detecting the amount of deflection of the anti-vibration rubber 4 due to the load (for example, the weight of the passenger 6) in the car 1, and 7 operates when the anti-vibration rubber 4 is bent by a predetermined amount. Micro switch 8 is a first weighing device that continuously detects the load using the operation transformer 5, and 9 is that the load reaches a predetermined set load (for example, 1000 kg) using the micro switch 7. Is a second weighing device for detecting the pressure.

Reference numeral 10 denotes a judgment circuit composed of a computer, which is mainly composed of an input device 11, a judgment device 12, and an abnormal signal output device 13. The input device 11 receives an analog signal 20 from the first weighing device 8 and a digital signal 21 from the second weighing device 9.
The signals 20 and 21 are converted into digital signals 22 and 23, respectively, and then output to the determination device 12. Then, when the first weighing device 9 is operated and the digital signal 23 is output, the determination device 12 determines whether the second weighing device is operating, and the second weighing device is operating. If not, the abnormality notification signal 24 is output from the abnormality signal output device 13, and a notification is issued to an external monitoring center or to sound a buzzer in the car 1.

Next, the operation of this embodiment will be described with reference to the flowchart of FIG. Note that the first weighing device is 120
% Load, and the second weighing device is set to 110% load.

First, a case in which the micro switch 7 of the second weighing device 9 is in a tight position and the micro switch 7 is not closed will be described. First, in step S1, when the load in the car increases, it is determined whether or not the first weighing device 8 has exceeded 120%. If the load exceeds 120%, the process jumps to step S2, and the second weighing device 9 operates. It is determined whether or not it has been done. At this time, if the second weighing device 9 is normal, it operates because the load exceeds 110%, but in this case, since the microswitch 7 is not closed, the operation becomes abnormal, and
The process jumps to step S3 and outputs an abnormality notification signal.

Next, it is assumed that an abnormality occurs in which the first weighing device 8 operates with a load of 80%. Also in this case, in the same manner as described above, in step S1, the first weighing device 8 operates with a load of 80%, and jumps to step S2. In this case, since the load is smaller than the load of 110%, the second weighing device 9 does not operate. Therefore, the process jumps to step S3 and outputs an abnormal signal.

As described above, even if an abnormality occurs in any of the first weighing device 8 and the second weighing device 9, it can be easily detected.

In the above-described embodiment, the operation state of the first and second weighing devices 8, 9 can be checked by the determination circuit 10 when the elevator is operating, and when an operation failure of these weighing devices 8, 9 is detected, an abnormality notification is made. Since the signal 24 is output, when the detection accuracy of the weighing devices 8 and 9 is undesirably reduced, the adjustment can be quickly performed. Therefore, the reliability of the weighing devices 8 and 9 can be maintained without increasing the frequency of the periodic inspection.

In the above embodiment, a computer is used for the determination circuit 10 as a balance monitoring device, but a similar balance monitoring device can be configured using a relay or a hard logic circuit. Further, the first weighing device 8 has been described as using the deflection amount of the vibration isolating rubber provided under the floor of the car, but in the case of a hydraulic elevator, the same applies even when the hydraulic pressure in the hydraulic cylinder is used. The effect is obtained.

[0020]

As described above, the elevator weighing monitor according to the present invention compares the output results of the two types of weighing devices during operation of the elevator, and when the detection accuracy of at least one of the weighing devices is greatly reduced, an abnormality notification signal. Is output, so that the operation failure of the weighing device can be quickly grasped without increasing the frequency of the periodic inspection, and there is an excellent effect that the reliability can be maintained.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of an elevator scale monitoring device according to the present invention.

FIG. 2 is a flowchart for explaining the operation of the balance monitoring layer shown in FIG.

[Explanation of symbols]

 Reference Signs List 1 car 7 micro switch 8 first weighing device 9 second weighing device 10 judgment circuit 11 input device 12 judgment device 13 abnormality signal output device 24 abnormality notification signal

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yasuhito Nakajima 1-6-6 Kandanishikicho, Chiyoda-ku, Tokyo Inside the Hitachi Building Systems Service Co., Ltd. (72) Yoshifumi Matsumoto 1-6-6 Kandanishikicho, Chiyoda-ku, Tokyo Inside Hitachi Building System Service Co., Ltd.

Claims (1)

[Claims] A first weighing device for continuously detecting a loaded load in a car; and a second weighing device that operates when the loaded load reaches a set load. When the weighing device operates, a difference between the detected value of the first weighing device and the set load is calculated, and a comparison determination unit that determines whether the difference exceeds a predetermined value; and An elevator weighing monitoring device comprising: an abnormality signal output unit that outputs an abnormality notification signal when the value exceeds a predetermined value. The elevator weighing device detects that the first weighing device has exceeded a predetermined value larger than the set load. And means for outputting an abnormality notification signal when the detection means is operating and the second weighing apparatus is not operating.