An elevator landing door self-closing device with malfunction detection function

Abstract

This invention discloses an elevator landing door self-closing device with an operational anomaly detection function, comprising: a door head assembly, a counterweight guide groove, a counterweight, and a counterweight wire rope. The counterweight guide groove is installed on a door panel, and the counterweight is slidably disposed within the counterweight guide groove and can move up and down within the counterweight guide groove. The device is characterized by further including a tension sensor installed within the door head assembly. One end of the counterweight wire rope is connected to the tension sensor, and the other end is connected to the counterweight. The tension sensor transmits a signal to the elevator control system via a data line. When the tension value measured by the tension sensor is less than the range set by the counterweight itself and the duration exceeds a time threshold set by the elevator control system, the elevator stops operating.

Description

Technical Field

[0001] This invention relates to the field of elevator technology, and in particular to an elevator landing door self-closing device with an operation anomaly detection function. Background Technology

[0002] Currently, most elevator landing doors use a counterweight structure for their self-closing devices. The counterweight slides within a counterweight guide groove. This structure provides stable counterweight and does not cause changes in the self-closing force due to changes in the landing door's travel distance.

[0003] However, this structure presents the following risks:

[0004] 1. The opening of the counterweight guide channel is not sealed, and construction waste can easily enter the counterweight guide channel, causing the counterweight to get stuck in the counterweight guide channel.

[0005] 2. After the counterweight gets stuck in the counterweight guide groove, the control system cannot detect it, and the elevator continues to run, causing the counterweight wire to get caught in the door head assembly, resulting in damage to the door head assembly components. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide an elevator landing door self-closing device with an operation abnormality detection function, which addresses the above-mentioned technical problems existing in the counterweight structure used in the self-closing device of elevator landing doors.

[0007] To achieve the above-mentioned objectives, the present invention provides an elevator landing door self-closing device with an abnormal operation detection function, comprising: a door head assembly, a counterweight guide groove, a counterweight, and a counterweight wire rope. The counterweight guide groove is installed on a door panel, and the counterweight is slidably disposed within the counterweight guide groove and can move up and down within the counterweight guide groove. The device is characterized by further comprising a tension sensor installed within the door head assembly. One end of the counterweight wire rope is connected to the tension sensor, and the other end is connected to the counterweight. The tension sensor transmits a signal to the elevator control system via a data line. When the tension value measured by the tension sensor is less than the range set by the counterweight itself and the duration exceeds a time threshold set by the elevator control system, the elevator stops operating.

[0008] In a preferred embodiment of the present invention, the upper opening of the counterweight guide groove extends into the folded edge on the upper side of the door panel.

[0009] In a preferred embodiment of the present invention, the tension sensor is installed on the door panel hanging plate on the other side of the door panel corresponding to the door panel inside the door head assembly. A weighted steel wire rope drop hole is provided on the door panel hanging plate. A sealing element is provided in the weighted steel wire rope drop hole. The weighted steel wire rope passes through the sealing element and enters the weighted guide groove through the weighted steel wire rope drop hole.

[0010] In a preferred embodiment of the present invention, the sealing element has a structure that is large at both ends and small in the middle.

[0011] Because of the adoption of the above technical solution, the present invention has the following characteristics:

[0012] 1. A seal is installed at the inlet above the counterweight wire rope to effectively prevent garbage from entering.

[0013] 2. The upper opening of the counterweight guide groove is located inside the door panel fold, which prevents the counterweight guide groove opening from being exposed to the outside and effectively prevents garbage from entering.

[0014] 3. The change in the tension of the counterweight is detected by a tension sensor and fed back to the elevator control system to promptly determine if there is any jamming or abnormality, thus ensuring the safe operation of the elevator. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the elevator landing door self-closing device with an abnormal operation detection function according to the present invention.

[0016] Figure 2 This is a schematic diagram of the installation of the tension sensor in the elevator landing door self-closing device with operation abnormality detection function of the present invention.

[0017] Figure 3 This is a schematic diagram of the tension sensor structure in the elevator landing door self-closing device with operation abnormality detection function of the present invention.

[0018] Figure 4 This is one of the schematic diagrams showing the counterweight passing over the counterweight wire rope guide wheel in the elevator landing door self-closing device with operation abnormality detection function of the present invention.

[0019] Figure 5 This is the second schematic diagram of the counterweight passing over the counterweight wire rope guide wheel in the elevator landing door self-closing device with operation abnormality detection function of the present invention.

[0020] Figure 6 This is a schematic diagram of the sealing component structure in the elevator landing door self-closing device with operation abnormality detection function of the present invention. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0022] See Figures 1 to 6 The elevator landing door self-closing device with abnormal operation detection function shown in the figure includes: door head assembly 13, counterweight guide groove 9, counterweight 10 and counterweight wire rope 11.

[0023] The door frame assembly 13 includes a right door hanging plate 3, a left door hanging plate 6, a linkage steel wire rope 7, a left door panel 8, and a right door panel 12.

[0024] See also Figure 6 The counterweight guide groove 9 is fixedly installed on the right door panel 12 (it can also be fixedly installed on the left door panel 8). The upper opening of the counterweight guide groove 9 extends into the folded edge of the right door panel 12, eliminating the risk of debris entering from the side of the door panel and preventing the counterweight 10 from getting stuck in the counterweight guide groove 9.

[0025] A counterweight wire rope inlet hole (not shown in the figure) is provided on the right door hanging plate 3 (or the left door hanging plate 6). A sealing element 1 is provided in the counterweight wire rope inlet hole. The counterweight wire rope 11 passes through the middle of the sealing element 1. The sealing element 1 can effectively prevent debris above the counterweight guide groove 9 from entering and prevent the counterweight 10 from getting stuck in the counterweight guide groove 9. The sealing element 1 has a structure that is large at both ends and small in the middle to prevent the counterweight wire rope 11 from pulling out the sealing element 1 when moving up and down.

[0026] The tension sensor 4 is fixed to the left door panel 6 via the fixed bracket 5 (it can also be fixed to the right door panel 3). One end of the counterweight wire rope 11 is connected to the tension sensor 4, and the other end is connected to the counterweight 10. The middle part is rotated 90° by the counterweight wire rope guide wheel 2. When the right door panel 12 and the left door panel 8 are opened and closed by the door operator and through the linkage wire rope 7, the counterweight 10 slides up and down in the counterweight guide groove 9. The tension sensor 4 tests the change of the self-closing force of the counterweight 10 during the sliding process.

[0027] When the elevator doors open and close, the tension sensor 4 detects the value of the tension F generated on the counterweight wire rope 11 and transmits the detected data to the elevator control system in real time through the data transmission line 14. When the tension F value measured by the tension sensor is less than the range set by the counterweight 10 itself and the duration exceeds the time threshold set by the elevator control system, the elevator stops running.

Claims

1. An elevator landing door self-closing device with an operational anomaly detection function, comprising: The elevator comprises a door frame assembly, a counterweight guide groove, a counterweight, and a counterweight wire rope. The counterweight guide groove is installed on a door panel, and the counterweight is slidably disposed within the counterweight guide groove and can move up and down within the counterweight guide groove. The elevator is characterized by further including a tension sensor installed within the door frame assembly. One end of the counterweight wire rope is connected to the tension sensor, and the other end is connected to the counterweight. The tension sensor transmits a signal to the elevator control system via a data line. When the tension value measured by the tension sensor is less than the range set by the counterweight itself and the duration exceeds a time threshold set by the elevator control system, the elevator stops operating.

2. The elevator landing door self-closing device with operational anomaly detection function according to claim 1, characterized in that, The upper opening of the counterweight guide groove extends into the folded edge on the upper side of the door panel.

3. The elevator landing door self-closing device with operational anomaly detection function according to claim 1 or 2, characterized in that, The tension sensor is installed on the door panel hanging plate on the other side of the door panel inside the door head assembly. A weighted steel wire rope drop hole is provided on the door panel hanging plate. A sealing element is provided in the weighted steel wire rope drop hole. The weighted steel wire rope passes through the sealing element and enters the weighted guide groove through the weighted steel wire rope drop hole.

4. The elevator landing door self-closing device with operational anomaly detection function according to claim 3, characterized in that, The seal has a structure that is large at both ends and small in the middle.

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