CN210084672U - Accidental car movement protection system and car position detection device - Google Patents

Abstract

The utility model relates to a car accidental movement protection system and a car position detection device. The car position detection device is used for detecting whether a car of an elevator is in a door zone. The car position detection device is provided with: a detected object on the car; a plurality of position detectors arranged in the hoistway, each of the position detectors is respectively arranged at a position corresponding to each floor, and each of the position detectors detects the detected object by detecting to detect whether the car is in the door zone; and a branch cable arranged in the hoistway, the branch cable is used to transmit the detection signal of the position detector.

Description

Car accidental movement protection system and car position detection device

technical field

The utility model relates to a car accidental movement protection system, in particular to a car position detection device in the system for detecting whether a car of an elevator is in a door zone.

Background technique

In recent years, attention has been paid to the safety protection system when the elevator car moves unexpectedly (unintended car movement). In China, GB7588-2003 "Safety Specifications for Elevator Manufacturing and Installation" National Standard No. 1 Amendment Sheet stipulates the accidental movement protection device of the elevator car. In Japan, the revised Building Standard Law provides for the obligation to install safety devices that automatically stop the car in the event of an unexpected movement of the car.

For the existing elevators before the introduction of these regulations, by adding necessary devices and devices, it can be transformed into an elevator equipped with a car accidental movement protection system.

In the car accidental movement protection system, to determine whether the car moves unexpectedly, the landing door switch signal, the car door switch signal and the detection signal of whether the car is in the door zone are needed. Among them, the detection signal of whether the car is in the door zone has different circuits due to different elevator models, and it is difficult to use the existing elevator signals. It is preferable to additionally provide a car position detection device for detecting whether the car is in the door zone dedicated to the car accidental movement protection system.

Generally, in a car position detection device, the position detector is installed on the car, and the object to be detected is installed in the hoistway. The elevator disclosed in Japanese Unexamined Patent Publication No. 2017-57039 adopts such a structure.

Utility model content

The problem existing in the prior art is: when the existing elevator is reconstructed, if the above structure is adopted, the traveling cable needs to be used, and if there is no empty line (unused line) in the traveling cable, additional traveling cable needs to be laid, The addition of a traveling cable may cause unbalance between the car and the counterweight, and deviation of the center of gravity of the car, etc., so adjustment work is required.

In view of the above technical problems, the purpose of the present invention is to provide a car position detection device, which does not require additional traveling cables and adjustments due to the addition of traveling cables when retrofitting an existing elevator and adding a car accidental movement protection system homework etc.

In order to achieve the above purpose, the car position detection device of the present utility model is used to detect whether the car of the elevator is in the door zone, and the car position detection device includes: a detected body arranged on the car; a plurality of position detectors in the hoistway, each of the position detectors is respectively arranged at a position corresponding to each floor, and each of the position detectors detects whether the car is in the door zone by detecting the detected object; and a branch cable arranged in the hoistway, the branch cable is used for transmitting the detection signal of the position detector.

Preferably, the detection signals of the position detectors are normally open contact signals, and the normally open contact signals of a plurality of the position detectors are connected in parallel with each other and connected to one input circuit.

Preferably, the car position detection device further includes a plurality of box-shaped members each for covering the connection between the branch cable and the signal line of each of the position detectors, the box-shaped members being fixed to on the bracket of the position detector.

The utility model also provides a car accidental movement protection system, which includes the above-mentioned car position detection device.

The car position detection device of the present invention does not require additional traveling cables and adjustment operations due to the addition of traveling cables when the existing elevator is retrofitted and a car accidental movement protection system is added.

Problems, structures, and effects other than those described above will be clarified by the description of the following embodiments.

Description of drawings

Fig. 1 is a schematic diagram of an example of an elevator provided with a car accidental movement protection system and a car position detection device of the present invention.

FIG. 2 is a schematic external view showing an example of a position detector.

FIG. 3 is a schematic diagram showing a connection method of a contact signal of a position detector.

<Marks in the drawings>

1 car; 2 object to be detected; 3 position detector; 4 branch cables; 5 traction rope; 6 traction machine; 7 brake; 8 brake control device; 9 car guide rail; 10 bracket; 11 box-shaped part; 12 accompanying cable; 13 normally open contact signal (detection signal of position detector); 14 input circuit.

Detailed ways

Hereinafter, the specific embodiments of the present invention will be described in detail with reference to the accompanying drawings and embodiments.

The car position detection device of the present invention is used to detect whether the car 1 of the elevator is in the door zone, and it is provided with: a detected body 2 arranged on the car 1; a plurality of position detectors 3 arranged in the hoistway , each position detector 3 is respectively arranged at the position corresponding to each floor, by detecting the detected body 2 to detect whether the car 1 is in the door zone; and the branch cable 4 arranged in the hoistway, the branch cable 4 is used for transmission position detection The detection signal of device 3.

Fig. 1 is a schematic diagram of an example of an elevator provided with a car accidental movement protection system and a car position detection device of the present invention.

As shown in FIG. 1 , in an elevator, a car 1 is suspended by one end of a hoisting rope 5 , and a counterweight (not shown) is suspended on the other end of the hoisting rope 5 . A hoisting machine 6 is provided on the upper part of the hoistway, and the car 1 is driven up and down in the hoistway by the driving of the hoisting machine 6 .

In such an elevator, a car accidental movement protection system is added in order to ensure the safety of passengers when the car unexpectedly moves.

As shown in FIG. 1 , the car accidental movement protection system includes a brake 7 . The brake 7 is a brake independent of the elevator running system. When the car moves unexpectedly, the brake 7 stops the car 1 . The brake 7 is, for example, a wire rope brake.

The unintended car movement protection system also includes a brake control device 8 for controlling the brake 7 . When the car 1 is not in the door zone (outside the door zone) and the car door and the landing door are open, the brake control device 8 determines that the car moves unexpectedly, and sends a command to the brake 7 to make the brake 7 Stop car 1. Here, the door zone refers to an area where the car door is permitted to be opened.

The brake control device 8 determines whether the car moves unexpectedly or not, and needs a landing door switch signal, a car door switch signal, and a detection signal of whether the car is in the door zone. Among them, the detection signal of whether the car is in the door zone has different circuits due to different elevator models, and it is difficult to use the existing elevator signals.

The above-mentioned car position detection device including the detected object 2 , the plurality of position detectors 3 and the branch cables 4 is additionally provided in order to provide the brake control device 8 with a detection signal of whether or not the car is in the door zone. The branch cable 4 is connected to the brake control device 8 and supplies the detection signal of each position detector 3 thereto. With such an arrangement, no modification of the existing traveling cable 12 is required.

As shown in FIG. 1, the to-be-detected body 2 is installed in the upper part of the cage|basket|car 1, and its number is one. The to-be-detected body 2 is a plate-like member, the length in the vertical direction corresponds to the gate area, and the thickness is smaller than the later-described inner pitch of the position detector 3 .

The position detectors 3 are installed in the hoistway, and the number of the position detectors is the same as that of the floors, and the positions of the position detectors correspond to the positions of the floors.

FIG. 2 is a schematic external view showing an example of a position detector. The position detector 3 is, for example, a photoelectric sensor. As shown in the figure, the position detector 3 is substantially U-shaped, and has two opposite arms, one of which is provided with a light-emitting element, and the other arm is provided with a light-receiving element. A predetermined inner distance is provided between the two arms.

Back to Figure 1. The position of the position detector 3 in the hoistway corresponds to the position of the detected body 2 on the upper part of the car 1. When the car 1 starts to enter the door area, the upper or lower end of the detected body 2 is inserted into the position upward or downward. In the detection area between the two arms of the detector 3, when the car 1 leaves the door area, the lower end or the upper end of the detected object 2 comes out of the detection area between the two arms.

When the car 1 is in the door zone, the light emitted by the light emitting element is shielded by the detection body 2, and the signal of the position detector 3 is ON (shading). When the car 1 is not in the door zone, the light emitted by the light emitting element is not It is shielded by the object to be detected 2, and the signal of the position detector 3 is OFF (not shielded).

FIG. 3 is a schematic diagram showing a connection method of a contact signal of a position detector.

As shown in FIG. 3 , the detection signal of the position detector 3 is the normally open contact signal 13 . The normally open contact signals 13 of the plurality of position detectors 3 are connected in parallel with each other and connected (in series) to one input circuit 14 .

As described above, in the car position detection device of the present invention, a plurality of position detectors are provided on the side of the hoistway, and one object to be detected is provided on the side of the car. With such a configuration, when an existing elevator is retrofitted and a car accidental movement protection system is added, it is not necessary to add a trailing cable, and no adjustment work or the like due to the addition of a trailing cable is required.

Although the number of position detectors is increased compared to the prior art, by setting the detection signals of all the position detectors as normally open contact signals, and connecting the normally open contact signals of all the position detectors in parallel with each other, thereby Only one input loop can be provided to input the detection signals of all the position detectors.

Back to Figure 1. The position detector 3 is fastened, for example, to car guide rails 9 in the hoistway. More specifically, the same number of brackets 10 as the number of floors are fixed to the car guide rail 9 , the positions of the brackets 10 correspond to the positions of the floors, and the position detectors 3 are attached to the brackets 10 .

A box-shaped member 11 is also fixed to each bracket 10, respectively. The number of the box-like members 11 is the same as the number of the position detectors 3 . The box-shaped member 11 is used to cover the connection between the branch cable 4 and the signal line of each position detector 3 . In other words, the branch cable 4 is connected to the connector of the position detector 3 within the box-like member 11 .

By providing the box-shaped member 11, exposure of the connection between the branch cable 4 and the position detector 3 is avoided, and short circuit, fire, etc. due to dust, deterioration, etc. can be prevented.

In addition, it is needless to say that other types of detectors such as electromagnetic detectors and objects to be detected corresponding thereto may be used as the above-mentioned position detectors.

For convenience of description, the above description has shown and described the position detector of one optical axis. However, in fact, in view of the redundant arrangement of the safety circuit, it is preferable to have two or more position detectors of the optical axis. .

In addition, the present invention is not limited to the above-described embodiments, and includes various modifications. For example, the above-mentioned embodiment has been described in detail in order to explain the present invention clearly, but it is not necessarily limited to include all the structures described. Further, a part of the structure of one embodiment can be replaced with the structure of another embodiment, and further, the structure of another embodiment can be added to the structure of one embodiment. In addition, addition, deletion, and replacement of other structures can be performed to a part of the structures of the respective embodiments.

Claims (4)

1. A car position detection device for detecting whether a car of an elevator is in a door zone, wherein the car position detection device comprises: a detected object arranged on the car; A plurality of position detectors installed in the hoistway, each of the position detectors is installed at a position corresponding to each floor, and each of the position detectors detects whether the car is in the door zone by detecting the detected object ;as well as A branch cable arranged in the hoistway, the branch cable is used to transmit the detection signal of the position detector. 2 . The car position detection device according to claim 1 , wherein: 2 . The detection signals of the position detectors are normally open contact signals, and the normally open contact signals of a plurality of the position detectors are connected in parallel with each other and connected to an input circuit. 3. The car position detection device according to claim 1, wherein The car position detection device further includes a plurality of box-shaped members each for covering the connection between the branch cable and the signal line of each of the position detectors, and the box-shaped members are fixed at the positions where they are attached. on the detector bracket. 4. A car accidental movement protection system, characterized in that, The car position detection device according to any one of claims 1 to 3 is included.

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