JPH06255927A - Derailment detecting device - Google Patents

Abstract

PURPOSE:To detect surely and without wrong action that a balancing weight has come off guide rails by fitting brushes to remove dust attached to electroconductors to the balancing weight so that they may move slidingly on the surfaces of the electroconductors in linkage with the movement of the balancing weight. CONSTITUTION:When a balancing weight 1 moves up and down at the time of the normal movement of an elevator, brushes 9-9 fitted to the balancing weight 1 also move up and down. At this time, the tips of the brushes 9-9 move slidingly on the surfaces of wires 6, so dust and rust affixed on the surfaces of the wires 6 are removed. Accordingly, at the time of an earthquake, in a case in which the balancing weight 1 comes off guide rails 3 and moves front and back and right and left, and the wires 6 and contacters 7 come into contact with each other, conduction between both is realized. As a result, the derailment of the balancing weight 1 can be detected surely and without wrong action.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rail derailment detecting device capable of reliably detecting rail derailment from a guide rail of an elevator car during an earthquake.

[0002]

2. Description of the Related Art FIG. 3 is a plan view showing a conventional rail-rail detecting device. In the figure, reference numeral 1 is a counterweight that balances the weight of an elevator car (not shown), and moves in the vertical direction (direction perpendicular to the paper surface). Reference numeral 2 is a guide shoe attached to each of the left and right side surfaces of the counterweight 1, and reference numeral 3 is a guide rail that is combined with the guide shoe 2 to guide the movement of the counterweight 1.
The guide rails 3 are each attached to a guide rail mounting plate 4, and the guide rail mounting plate 4 is attached to a hoistway wall 5 of the elevator. Reference numeral 6 denotes a wire as a conductor stretched near the guide rail 3 along the movement direction of the counterweight 1, that is, in the up-down direction, and two wires are provided on both left and right sides of the counterweight 1. Reference numeral 7 is a contactor arranged so as to surround the wire 6 at a position very close to the wire 6, and reference numeral 8 is a contactor attachment rod for attaching the contactor 7 to the counterweight 1.

Next, the operation of the conventional rail-rail detection device will be described. If an earthquake occurs during operation of the elevator, the guide shoes 2 may come off the guide rails 3 due to vibration. In this case, the counterweight 1 moves back and forth and left and right (up, down, left and right in FIG. 3), so the contactor 7 attached to the counterweight 1 by the contactor mounting rod 8 also moves back and forth and left and right. Here, since the distance between the wire 6 and the contact 7 is made very small, the wire 6 and the contact 7 are easily contacted with each other, and two sets of the wire 6 and the contact 7 are mutually Since they are arranged symmetrically, at least one of the two sets always contacts. By electrically detecting this contact, it is possible to detect the derailment of the counterweight 1, that is, the fact that the counterweight 1 is disengaged from the guide rail 3.

In the above electrical detection, for example, the conductive wire 6 is raised to a positive potential and the counterweight 1 is used.
It is sufficient to provide a relay (not shown) that is grounded and that operates according to the potential of the wire 6. In this case, the contact 7
When touches the wire 6, the potential of the wire 6 changes from the positive to the ground potential, whereby the relay operates and the rail-releasing is detected. Further, the operation of the elevator can be stopped by stopping the electric motor (not shown) that drives the elevator by the relay operation.

[0005]

The conventional derailment detection device is constructed as described above, and since the wire 6 and the contact 7 are not in contact with each other during normal operation, the surface of the wire 6 is not contacted. Dust and rust tend to adhere. When the amount of dust and the like increases, even if the wire 6 and the contact 7 come into contact with each other, the wire 6 and the contact 7 do not conduct due to the dust and the like interposed therebetween, and as a result, the balance weight 1 However, there is a problem in that it cannot detect that the vehicle has deviated from the guide rail 3.

The present invention has been made to solve the above problems, and prevents dust and the like from adhering to the surface of the wire to ensure that the counterweight is not displaced from the guide rail without malfunction. It is an object of the present invention to obtain a rail-releasing detection device capable of detecting.

[0007]

DISCLOSURE OF THE INVENTION The rail derailment detection device of the present invention is provided with a conductive contact attached to a counterweight that balances the weight of an elevator car and a guide rail that guides the movement of the counterweight. A derailment detection device that includes a conductor installed along the moving direction of the counterweight, and detects that the counterweight has derailed from the guide rail based on the presence or absence of conduction between the contact and the conductor. It is characterized in that a brush for removing dust adhering to the body is attached to the counterweight so as to slide and move on the surface of the conductor in association with the movement of the counterweight.

[0008]

In the rail derailment detecting apparatus of the present invention, when the counterweight moves up and down during normal operation of the elevator, the brush attached to the counterweight moves while sliding on the surface of the conductor. The dust and rust adhering to the surface of is removed. Therefore, in the event of an earthquake,
When the balance weight moves out of the guide rail and moves back and forth and left and right, and the conductor and the contact come into contact with each other, there is surely continuity between the two, so it is possible to reliably detect that the balance weight has come off the guide rail without malfunction. can do.

[0009]

1 is a front view of a rail-releasing detecting device according to an embodiment of the present invention. The same or corresponding parts as those of the conventional rail-releasing detecting device shown in FIG. The description is omitted. In the figure, 9 _{1 to} 9 ₄ are brushes attached to the counterweight 1 by the contact attachment rod 8 and the brush attachment rod 10, and the tips of the brushes 9 _{1 to} 9 ₄ are in contact with the surface of the wire 6. Figure 2 is an enlarged view of the vicinity of the brush 9 _1, (a) is a plan view, (b) is a front view. As shown in these figures, the brush mounting rod 10 is manufactured by bending a metal rod having a rectangular cross section.

Next, the operation of the rail derailment detector of the first embodiment will be described. When the counterweight 1 moves up and down during normal operation of the elevator, the brushes 9 _{1 to} 9 ₄ attached to the counterweight 1 also move up and down. At this time, since the tips of the brushes 9 _{1 to} 9 ₄ move while sliding on the surface of the wire 6, dust and rust adhering to the surface of the wire 6 are removed. Therefore, in the event of an earthquake,
When the counterweight 1 is disengaged from the guide rail 3 and moved back and forth and left and right to bring the wire 6 and the contact 7 into contact with each other, the two are surely brought into conduction. Other operations are the same as in the conventional case.

Although the conductor is the wire 6, it may be a conductive rod. Furthermore, if manufactured brushes 9 _to 93 ₄ of a flexible material, such as nylon, never wire 6 or worn or scratched.

[0012]

According to the rail derailment detection apparatus of the present invention,
Equipped with a conductive contact attached to the counterweight that balances the weight of the elevator car and a conductor placed near the guide rail that guides the movement of the counterweight and along the direction of movement of the counterweight. A brush that detects that the counterweight has derailed from the guide rails based on the presence or absence of conduction between the child and the conductor and removes dust adhering to the conductor slides on the conductor surface in conjunction with the movement of the counterweight. Since it is attached to the counterweight so that it moves and moves, dust and rust are prevented from adhering to the surface of the conductor, and it is possible to detect derailment of the counterweight without malfunction. .

[Brief description of drawings]

FIG. 1 is a front view of a rail-release detecting device according to an embodiment of the present invention.

2A and 2B are enlarged views in the vicinity of brushes 9 _{1 to} 9 ₄ in Embodiment 1, where FIG. 2A is a plan view and FIG. 2B is a front view.

FIG. 3 is a plan view showing a conventional rail-rail detection device.

[Explanation of symbols]

1 Counterweight 3 Guide rail 6 Wire (conductor) 7 Contactor 9 _{1 to} 9 ₄ Brush

Claims (1)

[Claims] 1. A conductive contact mounted on a counterweight that balances the weight of an elevator car, and a conductive rail installed near a guide rail that guides the movement of the counterweight along the direction of movement of the counterweight. A derailment detection device, comprising: a conductor, for detecting that the counterweight has derailed from the guide rail, depending on whether or not the contactor and the conductor are electrically connected, to remove dust adhering to the conductor. A derailment detection device, wherein the brush is attached to the counterweight so as to slide and move on the surface of the conductor in association with the movement of the counterweight.