WO2016056111A1

WO2016056111A1 - Speed regulator and elevator device

Info

Publication number: WO2016056111A1
Application number: PCT/JP2014/077125
Authority: WO
Inventors: 雄大田中; 中山　徹也; 薫平野
Original assignee: 株式会社日立製作所
Priority date: 2014-10-10
Filing date: 2014-10-10
Publication date: 2016-04-14
Also published as: JPWO2016056111A1; CN106794961A; CN106794961B; JP6324525B2

Abstract

The purpose of the present invention is to provide an elevator device with which a lever that has come into contact with a pendulum will not erroneously return to an original position. The present invention is equipped with a speed regulation cable (1) that is connected to an ascending and descending body (300) that ascends and descends within a hoistway of an elevator device, a sheave (4) on which the speed adjustment cable (1) is wound, a pendulum (5)that extends circumferentially outward due to centrifugal force in accordance with the rotational rate of the sheave (4), a lever (6) that turns through contact with the pendulum (5), and a shaft (8) that acts as the center of rotation of the lever (6). A stopper (10) is provided that restricts the angle of rotation of the lever (6) when the lever turns due to contact with the pendulum (5). Between the lever (6) and the shaft (8), a one-way clutch (9) is incorporated that allows the lever (6) to turn in one direction with the shaft (8) as the center of rotation and prevents the lever from turning in the opposite direction.

Description

Speed governor and elevator device

The present invention relates to an elevator apparatus, and more particularly to a speed governor that detects an overspeed of the elevator apparatus.

Elevator devices are generally equipped with a governor that constantly monitors the ascending / descending speed of the car and makes the car emergency stop when the car falls into a predetermined overspeed state. Specifically, the speed governor, when the raising / lowering speed of the car exceeds the rated speed and reaches the first overspeed (usually 1.3 times the rated speed), the power supply of the hoisting machine that drives the car, and this Each power supply of the control device that controls the hoisting machine is shut off. In addition, when the speed at which the car descends exceeds the first overspeed and reaches the second overspeed (usually 1.4 times the rated speed) for some reason, the governor turns off the emergency stop device provided on the car. Operate and mechanically stop the car.

The elevator governor includes a sheave on which a governor rope connected to the car is wound, a pendulum that spreads out of the circumference by centrifugal force according to the rotational speed of the sheave, and the pendulum. Has been proposed, and a mechanism having a lever that engages with a safety switch and rotates around an axis has been proposed (for example, see Patent Document 1).

Japanese Patent Laid-Open No. 2-158582

In recent years, elevator devices have tended to increase in speed, and as speed increases, in a governor that outputs a stop signal of a car by a mechanism using a pendulum, lever, and safety switch as in Patent Document 1, There may be problems such as the lever that has collided rotating vigorously and making a round, returning to its original position.

When the switch is erroneously restored, there arises a problem that the power of the hoisting machine that is shut off in the overspeed state and the power of the control device that controls the hoisting machine are turned on again.

This invention is made in view of the said subject, The objective is to provide the elevator apparatus with which the lever which contacted the pendulum did not return accidentally to an initial position.

A speed governor according to the present invention includes a speed control rope connected to a lifting body that moves up and down in a hoistway of an elevator apparatus, a sheave around which the speed control rope is wound, and a rotational speed of the sheave. In response to the pendulum, the governor includes a pendulum that expands outward due to centrifugal force, a lever that rotates in contact with the pendulum, and a shaft that serves as a rotation center of the lever. A stopper is provided to limit the rotation angle of the lever when it is rotated. Between the lever and the shaft, the lever is allowed to rotate in one direction around the shaft, and is rotated in the opposite direction. It features a built-in one-way clutch to prevent it.

An elevator apparatus according to the present invention includes an elevator body that moves up and down in a hoistway, a drive device that drives the elevator body, and a governor that detects an overspeed of the elevator body. The speed machine includes a speed control rope connected to a lifting body, a sheave around which the speed control rope is wound, and a pendulum that spreads out of the circumference by centrifugal force according to the rotational speed of the sheave A lever that rotates in contact with the pendulum, a shaft that serves as a rotation center of the lever, and a stopper that limits a rotation angle of the lever when rotating in contact with the pendulum, Between the shafts, a one-way clutch that allows rotation of the lever in one direction around the shaft and prevents rotation in the reverse direction is incorporated.

According to the present invention, it is possible to prevent the lever in contact with the pendulum from erroneously returning to the initial position.

1 is a schematic side view of an elevator apparatus according to an embodiment of the present invention. It is a front view of the governor which concerns on one Embodiment of this invention. It is a side view of the governor which concerns on one Embodiment of this invention. It is a perspective view which shows the detailed structure of the lever of the governor which concerns on one Embodiment of this invention, a shaft | shaft, and a flame | frame. It is a front view for demonstrating the outline | summary of the erroneous return of the governor to which this invention is not applied. It is a front view for demonstrating the operation | movement outline | summary of a speed governor at the time of this invention being applied.

Hereinafter, embodiments of an elevator apparatus according to the present invention will be described with reference to the drawings.

First, a schematic configuration of an elevator apparatus to which the present invention is applied will be described with reference to FIG.
In general, an elevator apparatus is a main rope that suspends a passenger car 300 that is an elevator body that moves up and down in a hoistway 200 provided in a building 1000, and a counterweight 400 that is an elevator body. 500, a traction sheave 600 provided in the machine room 100 around which the main rope 500 is wound, a driving device (not shown) that drives the traction sheave 600 and includes a braking device, and guides the raising and lowering of the car 300 Guide rail 700, an emergency stop device 800 that is provided in the car 300 and grips the guide rail 700 by a wedge in an emergency, and an operation lever 900 that drives the emergency stop device 800 and is pivotally supported on the car 300 side. The endless speed adjusting low connected to the operating lever 900 and stretched over the entire range of the car up and down stroke in the hoistway 200. 1, and a speed governor having a sheave 4 that wound the governor rope 1. The elevator apparatus to which the present invention is applied is not limited to the configuration shown in FIG. 1, and may be a mode in which a speed governor is installed in a hoistway, for example.

Next, the governor in the elevator apparatus of the present embodiment will be described. As shown in FIG. 2, the speed governor in the present embodiment has an endless shape, the speed controlling rope 1 disposed in the hoistway and connected to the lifting body, and the speed controlling rope 1 is wound. The suspended sheave 4, the pendulum 5 that rotates in synchronization with the sheave 4, and spreads out of the circumference by centrifugal force according to the rotational speed of the sheave, and the pendulum 5 A lever 6 that rotates by contact (collision) when the rotation radius of the lever 6 increases, a contact 7 that operates the safety switch when contact is made by the rotation of the lever 6, and a shaft 8 that is the center of rotation of the lever 6. A one-way clutch 9 that is incorporated in the lever 6 and restricts the rotation direction of the lever 6, a stopper 10 that restricts the rotation angle of the lever 6 that rotates by engaging with the pendulum, and a frame 11 on which the shaft 8 is fixed. I have. The one-way clutch 9 is one that allows rotation in one direction around the shaft 8 of the lever 6, in this embodiment, clockwise, and prevents rotation in the reverse direction. The position of the lever 6 is not limited to the upper part of the pendulum.

Also, as shown in FIG. 4, the shaft 8 has a regular hexagonal portion. Similarly, the shaft 8 is fixed in the rotational direction by inserting the regular hexagonal portion into the frame 11 having a regular hexagonal hole. Has been. The shaft 8 is fixed in the axial direction by fixing the shaft 8 to the frame 11 with a nut at the tip of the polygonal portion.

The shape of the shaft 8 and the frame 11 is not limited to a regular hexagon as long as the shaft 8 can be fixed to the hole at a different angle by rotating the shaft 8.

Here, the behavior of the lever 6 when the one-way clutch 9 is not incorporated in the lever 6 is shown in FIG. In FIG. 5, components corresponding to the same components as in the present embodiment are displayed by adding 100 to the reference numerals, and detailed description thereof is omitted. As shown in FIG. 5, since the one-way clutch 9 is not incorporated in the lever 106, the lever 106 is rotated by the collision of the pendulum 105 (FIG. 5A), and when the lever contacts the stopper 110 (collision), the lever Since the rotation direction of 106 is not limited, there is a possibility that it bounces off by the stopper 110 (FIG. 5B) and erroneously returns to the initial position (FIG. 5C).

That is, in the form shown in FIG. 5, the lever 106 with which the pendulum 105 collides vigorously rotates and makes a round around the shaft 108 to return to the original position in order to correspond to an elevator apparatus whose speed is increasing. In order to prevent this, a stopper 110 that limits the rotation range of the lever 106 is provided on the rotation track of the lever 106. However, in recent years, the lifting speed of the elevator apparatus tends to increase more and more, and the rotation speed of the pendulum 105 is also increased accordingly. Therefore, the force with which the pendulum 105 collides with the lever 106 is increased. The rotation speed is also increasing. Therefore, when such a stopper 110 is provided, it has been confirmed in experiments and the like that the lever 106 is bounced back by the stopper 110 and the lever 106 is erroneously returned to the original position.

The behavior of the lever 6 when a one-way clutch is incorporated in the lever 6 will be described with reference to FIG. On the other hand, when the one-way clutch 9 is incorporated in the lever 6 as shown in FIG. 6, the lever 6 is rotated by the collision of the pendulum 5 (FIG. 6A), and when the one-way clutch 9 comes into contact with the stopper 10, Since the rotation direction of the lever 6 that is rotated by the collision of the pendulum 5 is limited (FIG. 6B), erroneous return due to the collision of the lever 6 with the stopper 10 can be prevented.

If you want to return the lever 6 to the initial position intentionally, use the shaft structure shown in FIG. As shown in FIG. 4, the shaft 8 is fixed by inserting a regular hexagonal portion into a regular hexagonal hole of the frame 11, but once the shaft 8 is removed from the frame 11 and rotated, the shaft 8 is attached to the frame 11 at a different angle. It can be fixed. With this structure, the lever 6 can be returned to the initial position by rotating the lever 6 after fixing the shaft 8 at the position where the lever 6 is returned to the initial position or more.

場合 If it is necessary to check the operation by returning to the initial position many times, such as when adjusting the detection speed, the operation check shall be performed without fixing the screw part of the shaft 8 in the axial direction with the nut. Since the rotation of the shaft 8 in the rotation direction of the shaft is restricted by the hexagonal hole of the frame 11, the shaft does not rotate when the pendulum contacts the lever at the time of checking the operation, and the lever 6 does not return erroneously. You can check the operation. In the case of returning the lever, the above-mentioned means is implemented. However, since the shaft 8 is not fixed to the frame 11 in the axial direction, it can be easily returned to the initial position. Thereby, the operation check can be performed without increasing the time required for the detection speed adjustment and the like.

After the operation check is completed, the screw part is tightened with a nut and the shaft is fixed to the frame, so that the shaft 8 can be prevented from coming off from the frame 11 due to vibration during product transportation.

Thus, in this embodiment, the rotation direction of the lever 6 is limited by incorporating the one-way clutch 9 in the lever 6. Further, when the lever 6 is returned to the initial position, the shaft can be simply rotated and fixed. With such a configuration, it is possible to prevent the lever 6 that has been operated after detecting the overspeed of the elevator body of the elevator apparatus from being erroneously returned to the original position, and to improve the reliability of the elevator apparatus. In addition, since the shaft structure can easily return the lever 6 to the initial position, even when it is necessary to check the operation by returning to the initial position many times as in the detection speed adjustment, the working time is increased. Can be suppressed.

DESCRIPTION OF SYMBOLS 1 Speed control rope 4 Sheave 5 Pendulum 6 Lever 7 Contact 8 Axis 9 One-way clutch 10 Stopper 11 Frame 100 Machine room 200 Hoistway 300 Lifting body 400 Counterweight 500 Main rope 600 Traction sheave 700 Guide rail 800 Emergency stop device 900 Operation Lever 1000 Building

Claims

A speed control rope connected to a lifting body that moves up and down in the hoistway of the elevator apparatus, a sheave around which the speed control rope is wound, and a centrifugal force according to the rotational speed of the sheave, out of the circumference In a governor comprising a pendulum that expands toward the lever, a lever that rotates in contact with the pendulum, and a shaft that serves as a rotation center of the lever.
A stopper is provided to limit the rotation angle of the lever when rotating in contact with the pendulum, and the lever and the shaft are allowed to rotate in one direction around the axis of the lever, A speed governor that incorporates a one-way clutch that prevents rotation in the reverse direction.
2. The governor according to claim 1, wherein the shape of the whole or a part of the shaft is a polygon that is the same shape when rotated about the shaft, and the frame that forms the governor body has a plurality of the shafts. A governor comprising a hole corresponding to a square shape, and fixing the rotation of the shaft by inserting and fixing the polygonal shaft into the hole.
In an elevator apparatus comprising a lifting body that moves up and down in a hoistway, a drive device that drives the lifting body, and a governor that detects an overspeed of the lifting body,
The speed governor includes a speed control rope connected to a lifting body, a sheave around which the speed control rope is wound, and a centrifugal force according to a rotational speed of the sheave. A pendulum that expands, a lever that rotates in contact with the pendulum, a shaft that serves as a rotation center of the lever, and a stopper that limits a rotation angle of the lever when rotating in contact with the pendulum,
An elevator apparatus, wherein a one-way clutch is incorporated between the lever and the shaft to allow the lever to rotate in one direction around the shaft and prevent rotation in the reverse direction.