JP2002114465A - Overspeed detection device of elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an overspeed detection device of an elevator capable of being easily set even in elevator with no machine room and actuating an emergency stopping device. SOLUTION: The overspeed detection device 6 can be easily set even in the elevator without a machine room since pulleys conventionally set on upper and lower parts of an elevator shaft are eliminated by constituting the overspeed detection device 6 so as to detect overspeed of a passenger car 3 by allowing a pulley 62a provided on the passenger car 3 to abut on a wire rope 5 suspended in the elevator shaft 1. The overspeed detection device 6 can also certainly actuate the emergency stopping device 4 to ensure safety.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator overspeed detection device for detecting an overspeed of a car and operating an emergency stop device.

[0002]

2. Description of the Related Art In general, an elevator car overspeed detecting device is provided with pulleys at a machine room located at the top of a hoistway and at a bottom of a hoistway respectively, and ropes are stretched endlessly around these pulleys. The pulley is rotated according to the traveling of the car by connecting the rope and the car, and the overspeed of the car is detected by detecting the rotation speed of the pulley installed in the machine room.

At the time of detecting the overspeed, the overspeed detecting device grips the rope in the machine room to operate the emergency stop device provided in the car, that is, to hold the guide rail at a low pressure, thereby causing the riding to occur. It was a structure to stop the car in an emergency.

[0004] Further, the emergency stop by the detection of overspeed is necessary even at the time of installation while raising and lowering the elevator car, and a structure as described in Japanese Utility Model Laid-Open Publication No. 51-108241 has been conventionally proposed. It had been.

In this prior art, a rope hanging from above a hoistway is gripped instead of the guide rail.

[0006]

In recent years, in order to reduce the occupancy rate of elevators in buildings, there has been a tendency that many elevators without machine rooms are installed.

[0007] In the case of such a machine room-less elevator, it is difficult to provide a pulley as in the prior art described above in terms of space. During installation, due to the installation procedure,
There was also a disadvantage that the pulley could not be attached.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide an elevator overspeed detecting device which can be easily installed in an elevator without a machine room and can operate an emergency stop device. is there.

[0009]

In order to achieve the above object, the present invention detects an overspeed of a car ascending and descending guided by a guide rail erected in a hoistway, and installs the car in the car. An elevator overspeed detection device that operates an emergency stop device that stops the car by holding the guide rail under a narrow pressure in response to the operation of the elevator, wherein a wire rope stretched from the top to the bottom of the hoistway. An overspeed detection unit that includes a pulley that is attached to the car and that is wound around the wire rope and that rotates according to the elevation of the car, and that detects an overspeed of the car from the rotation speed of the pulley; A grip portion for gripping the wire rope in accordance with the detection of the overspeed detection portion, wherein the emergency stop device is operated in accordance with the operation of the grip portion.

[0010] Since the present invention has a configuration in which the car is provided with the overspeed detecting device, it can be easily installed even in an elevator without a machine room.

Since the pulleys installed at the upper and lower portions of the hoistway are unnecessary, the overspeed detecting device can be easily installed irrespective of the installation procedure of the elevator, so that the function of the emergency stop device at the time of installation can be secured and the safety can be secured. The above is also preferable.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. First, an overall configuration of an elevator provided with an overspeed detection device according to the present invention will be described with reference to FIGS.

FIG. 1 is a side view showing an overall configuration of an elevator provided with an overspeed detecting device according to an embodiment of the present invention.
FIG. 2 is a side view of FIG.

The elevator shown in FIG. 1 includes a pair of guide rails 2 erected on a hoistway 1 and a car 3 which is guided by the guide rails 2 via guide shoes 3a to move up and down.
And the guide rail 2 provided at the bottom of the car 3
And a wire rope 5 provided in the car 3 and stretched between the top portion 1a and the bottom portion 1b of the hoistway 1 by holding the car 3 at a low pressure. An overspeed detecting device 6 according to the present invention for detecting the overspeed of the car 3 by contacting the wire rope 5;
It is comprised including.

The wire rope 5 is fixed at its upper end to a hoistway top 1a via a shackle 7 and a fixing bracket 8, and its lower end is connected to a hoistway bottom 1b via a turnbuckle 9 and an eyebolt 10. It is fixed and stretched between the top 1a and the bottom 1b of the hoistway 1. The tension of the wire rope 5 can be adjusted by expanding and contracting the turnbuckle 9.

Next, the configuration of the overspeed detecting device 6 will be described with reference to FIG.
This will be described in detail with reference to FIG. The overspeed detecting device 6 of the present invention includes the wire rope 5 and the wire rope 5.
Overspeed detector 6 for detecting the overspeed of the car 3 by contacting the
a, and a gripper 6b that grips the wire rope 5 according to the overspeed detection of the overspeed detector 6a. Here, FIG. 3 is a front view showing the overspeed detection unit of the overspeed detection device, and FIGS. 4 and 5 are front views showing the overspeed detection unit and the gripping unit of the overspeed detection device.

As shown in the figure, the overspeed detecting section 6a includes pulleys 61a, 62a which contact the wire rope 5 and rotate in accordance with the elevation of the car 3, and a coaxial shaft 61 with the pulley 62a.
When the pulley 62a is mounted on the first pulley 62a and rotates at a certain speed or higher (ie, the car 3 is overspeed), the wings 63a are spread in the outer circumferential direction by centrifugal force, and the spread wings 63a
And a lever 64a which is displaced in the direction A by
The wire rope 5 is gripped by the gripping portion 6b by displacing the lever 64a.

The grip portion 6b has a first link 61b mounted on the same shaft 642a as the lever 64a, a push-down lever 62b pushed down by the shaft 642a of the lever 64a, and an attachment to the push-down lever 62b. A third link 63b, a first rope contact member 64b having one end attached to the third link 63b, and a second link connected to the other end of the first rope contact member 64b. 65b and a second rope contact member 66b for connecting the second link 65b and the third link 63b and holding the wire rope 5 between the first rope contact member 64b. When the lever 64a is displaced, the push-down lever 62b is pushed down in the direction B, so that the first rope contact member 64b faces the wire rope 5 to the left in FIG. Displaced, the third second moving left side in the drawing of the link 63b is the direction of arrow C of the rope abutment member 66
b and the first rope contact member 64b
A gripping force for gripping is generated.

The generation of the gripping force causes the car 3
A reaction force is generated in a direction opposite to the direction in which the elevator car moves up and down, and this reaction force is transmitted to the emergency stop device 4 via the connecting lever 11, the emergency stop device 4 operates, and the car 3 stops.

According to the present invention, as described above, the pulley 6 provided on the car 3 on the wire rope 5 stretched in the hoistway 1
Since the overspeed detection device 6 is configured to detect the overspeed of the car 3 by bringing the 2a into contact therewith, pulleys conventionally installed at the upper and lower portions of the hoistway become unnecessary, and even in an elevator without a machine room, it is easy. Installation is possible.

Since the overspeed detecting device 6 can be easily installed irrespective of the elevator installation procedure, the function of the emergency stop device 4 at the time of installation can be secured, which is preferable from the viewpoint of safety.

[0022]

According to the present invention, an overspeed detection device for an elevator which can be easily installed in an elevator without a machine room and can operate an emergency stop device can be provided.

[Brief description of the drawings]

FIG. 1 is a side view showing an overall configuration of an elevator provided with an overspeed detection device according to an embodiment of the present invention.

FIG. 2 is a side view of FIG. 1;

FIG. 3 is a front view showing an overspeed detection unit of the overspeed detection device according to the embodiment of the present invention.

FIG. 4 is a front view showing an overspeed detection unit and a grip unit of the overspeed detection device according to the embodiment of the present invention.

FIG. 5 is a front view showing an overspeed detection unit and a grip unit of the overspeed detection device according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hoistway 1a Hoistway top part 1b Hoistway bottom part 2 Guide rail 3 Car 4 Emergency stop device 5 Wire rope 6 Overspeed detection device 6a Overspeed detection portion 6b Gripping portion 61a Pulley 62a Pulley

Claims (1)

[Claims] An overspeed of a car ascending and descending guided by a guide rail erected in a hoistway is detected, and the guide rail is held in a narrow pressure in response to operation provided in the car. An elevator overspeed detection device for operating an emergency stop device for stopping a car, comprising: a wire rope stretched from the top to the bottom of the hoistway; and the wire rope attached to the car and wound around the wire rope. An overspeed detection unit for detecting an overspeed of the car from a rotation speed of the pulley, the pulley rotating in accordance with the elevation of the car, and gripping the wire rope in response to the detection of the overspeed detection unit. And a gripper that performs
An overspeed detecting device for an elevator, wherein the emergency stop device is operated in accordance with the operation of the grip portion.