JP2001294380A - Elevator wiring cable abnormal condition detector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wiring cable abnormal condition detector determining excessive extension of a cable correctly only when the cable is caught by an apparatus inside a hoistway. SOLUTION: This elevator wiring cable abnormal condition detector is installed to a car lower face 1a via an elastic body, and when vertical displacement of a cable suspending hanger 4 for suspending a wiring cable 3 is detected by means of a switch 7, the wiring cable 3 can be prevented from being pulled excessively in an accident. By means of guide grooves 5a, 6a arranged in hanger guide boards 5, 6 arranged on both sides of the cable suspending hanger 4, horizontal movement of the cable suspending hanger 4 is restricted, so that reliability of the abnormal condition detector can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention aims to prevent accidents such as excessive pulling and cutting of a wiring cable caused by lifting and lowering the elevator while the wiring cable of the elevator is hooked on equipment in a hoistway. Related to the device to prevent.

[0002]

2. Description of the Related Art FIG. 6 is a side view of the overall structure of an elevator apparatus in a hoistway. One end of a distribution cable 3 for supplying electric power for lighting and air conditioning to the elevator car 1 and for transmitting and receiving control signals is attached below the car 1. On the other hand, the other end of the distribution cable 3 is connected to a cable connection box 13 provided in the hoistway.

[0003] The wiring cable 3 is greatly shaken by an earthquake, strong wind, or the like while the elevator is running, and may be caught by equipment (for example, a guide rail support bracket and a landing device) in the hoistway. If the elevator continues to move up and down in that state, the wiring cable will be pulled excessively and cut. In order to prevent such an accident, the cable abnormality detecting device 8 has been conventionally used.

FIG. 7 is an enlarged view of the cable abnormality detecting device 8 in FIG. 6 as viewed from the front of the car 1. The wiring cable 3 is once hung on the mounting bracket 9 on the car 1 side, and one end thereof is attached below the car 1. The wiring cables under the wiring cables 3 are overlapped and fastened by clip members 12 so that the hanging portions do not slide down. The mounting bracket 9 is mounted on the lower surface of the car 1 via an elastic body 10. When the wiring cable 3 is pulled downward, the mounting bracket 9 hanging the wiring cable 3 is also pulled downward, and as a result, the elastic body 10 is stretched. Car 1 by it
The vertical displacement of the mounting bracket 9 with respect to the lower surface of the mounting bracket 9 can be detected by a displacement detecting device 11 provided on the mounting bracket 9.

[0005] If the displacement of the mounting bracket 9 is measured by the detecting device 11 and if the displacement exceeds a certain value, the elevator is stopped from moving up and down. If the wiring cable is hooked on the equipment in the hoistway, the elevator is stopped. If the wiring cable is pulled excessively while the operation is continued, the elevator car 1 stops moving up and down, and it is possible to prevent an accident in which the wiring cable is disconnected.

[0006]

In the conventional cable abnormality detecting device, the mounting bracket 9 moves freely in the horizontal direction as well as in the vertical direction. Therefore, car 1
When the rope hanging the car 1 or the like swings greatly in the horizontal direction, the mounting bracket 9 also swings greatly in the horizontal direction. As a result, there has been a problem that the detection device malfunctions and the elevator of the car is stopped even though the wiring cable is not hooked on the equipment in the hoistway.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a wiring cable abnormality detecting device that correctly determines whether a cable is overextended only when the cable is hooked on a device in a hoistway. is there.

[0008]

In order to achieve the above-mentioned object, the present invention provides an elevator car having a lower surface provided with an elastic body on an underside thereof, one end of which is attached to a part of an elevator control device and the other end of which is attached to the elevator. Has a cable hanging hanger portion for hanging a wiring cable attached to a part of the car, and a sensor portion for detecting a displacement of the cable hanging hanger portion, and detects overextension of the wiring cable. In the cable abnormality detecting device, the guide groove attached to the lower surface of the car and restricting horizontal movement of the cable hanging hanger portion has a hanger guide portion extending in a vertical direction of the lower surface of the car. I do.

According to the above construction, when the car or the rope suspending the car swings largely in the horizontal direction, the guide groove provided in the hanger guide portion can restrict the movement of the cable hanging hanger in the horizontal plane. it can.

[0010]

Embodiments of the present invention (hereinafter referred to as embodiments) will be described below with reference to the drawings.

FIG. 1 is a perspective view of the cable abnormality detecting device 2. FIG. 2 is a front view of the cable abnormality detection device 2 in FIG. FIG. 3 is a left side view of the cable abnormality detecting device in FIG.

In FIG. 1, an elevator car 1
The cable suspension hanger 4 is attached to the lower surface 1a of the cable via two elastic bodies 10a and 10b. The cable hanging hanger 4 has a substantially cylindrical shape, and the distribution cable 3 is hung near the center of the shaft portion 4a. Therefore, when the suspended distribution cable 3 is pulled downward, the elastic bodies 10a and 10b are stretched, and the cable suspension hanger 4 is displaced downward. The elastic members 10a and 10b are connected to the shaft portions 4 so as not to be an obstacle when the distribution cable 3 is hung.
a. In addition, the wiring cable 3 under the wiring cable 3 is overlapped and fastened by the clip member 12 so that the hanging part does not slide down.

On the lower surface 1a of the car, on both sides of the cable suspension hanger 4, flat hanger guide plates 5, 6 are provided.
The hanger guide plates 5 and 6 have guide grooves 5 a and 6 a extending vertically below the lower surface 1 a of the car 1.

The width of each guide groove is formed slightly larger than the diameter of a circle which is a cross section of the shaft portion 4a of the cable hanging hanger (see FIG. 3), and hanger guide plates 5, 6 are provided. The interval is slightly shorter than the length of the shaft portion 4a (see FIG. 2). Therefore, both ends of the shaft portion 4a can move vertically below the lower surface 1a of the car 1 within a range where the guide grooves 5a, 6a are provided, while being guided by the guide grooves 5a, 6a, respectively. Each guide groove 5
The range in which a and 6a are provided is set wider than the range of movement in consideration of the normal range of acceleration and deceleration of the elevator and the range of movement of the cable hanging hanger due to the weight of the wiring cable. On the other hand, since the width of the guide groove is substantially equal to the diameter of a circle which is a cross section of the shaft portion 4a, the cable hanging hanger can hardly move in the front-rear direction (i-j direction in FIGS. 1 and 3). .

FIG. 4 is a view of the hanger guide plate 6 as viewed from the inside. Below the hanger guide plate, a protruding portion 6b that protrudes forward is provided, and a switch 7 is mounted inside the protruding portion 6b. The switch lever 7a provided on the switch 7 is provided so as to contact a part of the shaft 4a when the shaft 4a is lowered along the guide groove (see FIG. 2). Therefore, if the operation of the elevator car is stopped when the switch 7a is depressed (see the dotted line in FIG. 4), the operation of the elevator is performed while the wiring cable is hooked on the equipment in the hoistway. If the wiring cable is pulled excessively, the elevator car 1 stops moving up and down, thereby preventing an accident in which the wiring cable is disconnected.

FIG. 5 is a front view of the cable hanging hanger 4. Two circular flanges 4b and 4c and two circular flanges 4d and 4e are provided at both ends of the shaft portion 4a of the cable hanging hanger 4, respectively. The flanges 4b and 4c sandwich the hanger guide plate 5, and the flanges 4d and 4e sandwich the hanger guide plate 6 from outside and inside, respectively (see FIG. 2).
Therefore, even if an axial force is applied to the cable hanging hanger 4, the cable hanging hanger cannot move freely in that direction. Further, as described above, the forward and backward movement of the cable hanging hanger is regulated by the width of the guide groove, and therefore, the cable hanging hanger is configured to be unable to freely move in the horizontal direction. I have.

For example, when the distribution cable is largely swung in the horizontal direction, the cable hanging hanger receives a large horizontal force. Conventionally, the cable hanger hung greatly in the horizontal direction, and as a result, there was a problem that the detection device malfunctioned. However, in the cable abnormality detection device 2 according to the embodiment of the present invention, Even in the situation described above, the cable hanging hanger 4 hardly moves in the horizontal direction. Therefore,
If the equipment is not hooked on the equipment in the distribution cable hoistway, there is no problem that the detection device malfunctions and the elevating of the elevator stops.

In the cable abnormality detecting device described above, the shapes of the cable hanging hanger, the hanger guide plate, and the guide groove are not limited to those described in this embodiment. Any configuration may be used as long as the guide groove is formed so that the cable suspension hanger moves only in the vertical direction of the lower surface of the car. Thus, by the way in which the guide grooves and the cable suspension hangers engage, they are formed so as to have a form suitable for that method.

[0019]

As described above, according to the present invention,
Overextension of the cable can be correctly determined only when the cable is hooked on a device in the hoistway.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a cable abnormality detection device according to an embodiment of the present invention.

FIG. 2 is a front view showing the cable abnormality detection device according to the embodiment of the present invention.

FIG. 3 is a left side view showing the cable abnormality detection device according to the embodiment of the present invention.

FIG. 4 is a view of the hanger guide plate 6 as viewed from the inside.

5 is a front view of the cable hanging hanger 4; FIG.

FIG. 6 is an overall configuration diagram of an elevator apparatus.

FIG. 7 is a diagram showing a conventional cable abnormality detection device.

[Explanation of symbols]

1 elevator car, 2 cable abnormality detector,
3 Wiring cable, 4 cable hanger, 5, 6 hanger guide plate, 5a, 6a guide groove, 7 switches.

Claims (1)

[Claims] 1. An elevator car having an elastic body provided on a lower surface of a car, one end of which is attached to a part of a control device of the elevator, and the other end of which hangs a wiring cable attached to a part of the car. A cable suspending hanger portion, and a sensor portion for detecting displacement of the cable suspending hanger portion, in a cable abnormality detecting device for detecting over-extension of the wiring cable, attached to a lower surface of the car, An elevator wiring cable abnormality detecting device, wherein a guide groove for restricting horizontal movement of the cable hanging hanger portion has a hanger guide portion extending in a vertical direction of a lower surface of the car.