WO2017033270A1

WO2017033270A1 - Elevator governor and elevator device

Info

Publication number: WO2017033270A1
Application number: PCT/JP2015/073784
Authority: WO
Inventors: 中山　徹也; 薫平野
Original assignee: 株式会社日立製作所
Priority date: 2015-08-25
Filing date: 2015-08-25
Publication date: 2017-03-02
Also published as: CN107848749B; KR20180020242A; KR101967590B1; CN107848749A; JPWO2017033270A1; JP6410950B2

Abstract

The purpose of the present invention is to ensure that a linking mechanism and a ratchet mechanism are reliably coupled in a governor that can maintain a state in which the linking mechanism and a catch weight are independent. An elevator governor comprises: a ratchet mechanism (204) that comprises a plurality of pawl action points (204a) that engage with a fly weight (202); and a disc (205) that is integrated with the ratchet mechanism (204) and that comprises an engaging unit (209) to which a first linking mechanism (206) engages. The disc (205) has a coupling prevention shaped portion (301) that prevents the first linking mechanism (206) from being in an orientation in which the first linking mechanism (206) can couple with a catch weight (207) when the first linking mechanism (206) is not in a position of being engaged with the engaging unit (209).

Description

Elevator governor and elevator apparatus

The present invention relates to a speed governor for an elevator which is used in an elevator device and detects an overspeed of the car and operates a car safety device (emergency stop device).

In general, an elevator device is provided with a governor that constantly monitors the ascending / descending speed of a car and makes an emergency stop when the car falls into a predetermined overspeed state. Specifically, the speed governor is a hoisting machine that drives the car when the elevator lifting speed exceeds the rated speed and reaches the first overspeed (usually about 1.3 times the rated speed). The power source and the power source of the control device that controls the hoisting machine are shut off. In addition, the governor is installed in the car when the car descending speed exceeds the first overspeed and reaches the second overspeed (usually about 1.4 times the rated speed) for some reason. Activate the stop device to mechanically stop the car.

As a conventional governor, an elevator governor described in JP-A-53-147350 (Patent Document 1) is known. The governor for elevators of Patent Document 1 has a structure in which an opposing pendulum (fly weight) rotates in synchronization with a governor pulley that spans a governor rope and opens in an outer peripheral direction by centrifugal force. When the elevator reaches the first overspeed, the pendulum pushes the engagement element to move the lever. By this movement of the lever, the engaging lever engaged with the contact of the switch is separated from the contact, and the switch is cut off. This shuts off the power source and prevents the car from overspeeding. When the speed is further increased and the second overspeed is reached, the pendulum comes into contact with the hook (link mechanism) that holds the wedge (weight) that holds the governor rope, and the hook and the pin provided on the wedge are disengaged. Is dropped by its own weight. The wedge that has fallen bites the governor rope between the backing plate attached to the frame and grips the governor rope. When the governor rope is gripped and a tension is generated in the governor rope between the falling car and the governor, the safety lever is actuated to activate the car safety device (emergency stop device).

In the elevator governor of Patent Document 1, the hook and the wedge are held in a self-supporting state by engaging the hook with a pin provided on the wedge.

JP-A-53-147350 (first page to second page)

In the elevator governor of Patent Document 1, two governor pulleys are provided on the governor pulley to push the engaging element and move the lever, and there are two operating points of the governor on the circumference of the governor pulley. The hook and the wedge are held in a self-supporting state and are not engaged with the governor pulley.

In the governor (hereinafter referred to as the governor), the operating point (inspired operation point) of the governor can be increased by using the ratchet mechanism. In a speed governor incorporating a ratchet structure, a hook (hereinafter referred to as a link mechanism) engaged with a wedge (hereinafter referred to as a catch weight) is connected to the ratchet mechanism, so that the number of operating points of the ratchet mechanism is The timing for releasing the engagement between the link mechanism and the catch weight can be advanced, and the timing for gripping a governor rope (hereinafter referred to as a governor rope) by the catch weight when an overspeed occurs can be advanced.

On the other hand, in such a structure, in a state where the catch weight and the link mechanism are engaged, since the link mechanism and the catch weight can maintain a self-supporting state, the link mechanism and the ratchet mechanism are not connected. , Catch weight may be set.

An object of the present invention is to ensure that the link mechanism and the ratchet mechanism can be connected in a governor capable of maintaining the link mechanism and the catch weight in an independent state.

In order to achieve the above object, a speed governor for an elevator according to the present invention includes a speed governor rope that moves in conjunction with a riding car, a sheave around which the speed governor rope is wound, and the sheave. A flyweight that rotates and changes its attitude with respect to the sheave according to the rotational speed of the sheave, and a catch weight that grips the governor rope with another member by dropping from a self-supporting holding position An elevator governor comprising: a first link mechanism coupled to the catch weight and being released from the connection with the catch weight in response to a change in posture of the fly weight; A ratchet mechanism having a plurality of triggering operation points, and a disc having an engagement portion integrated with the ratchet mechanism and engaged with the first link mechanism, The recording disk is a connection blocking shape portion that prevents the first link mechanism from being connected to the catch weight except at a position where the first link mechanism is engaged with the engaging portion. Have

According to the present invention, the disc integrated with the ratchet mechanism holds the first link mechanism in a posture in which the first link mechanism and the catch weight cannot be connected except at the engagement position of the first link mechanism. By having the connection blocking shape portion to be connected, the link mechanism (first link mechanism) and the ratchet mechanism can be reliably connected, and the catch weight can be reliably set.

1 is a schematic configuration diagram of an elevator apparatus according to the present invention. It is the schematic of the 1st Example of the governor for elevators which concerns on this invention. It is a front view which expands and shows a part of elevator governor shown in FIG. FIG. 4 is a cross-sectional view showing a cross section IV-IV in FIG. 3. It is a front view which expands and shows a part about 2nd Example of the governor for elevators which concerns on this invention.

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. FIG. 1 is a schematic configuration diagram of an elevator apparatus according to the present invention.

In general, an elevator apparatus has a hoistway (car) 103 and a counterweight 104 connected to a hoistway 102 provided in a building 100 by a main rope 105, and the car 103 can be raised and lowered along a guide rail 107. It is comprised so that. In the machine room 101 formed in the upper part of the hoistway 102, a hoisting machine 106 around which the main rope 105 is wound, a control panel 114 for controlling the hoisting machine 106, a speed governor 110, and the like are arranged. .

The speed governor 110 includes an endless speed governor rope 111 that is stretched over the entire lifting stroke in the hoistway 102, and a sheave (control gear) installed in the machine room 101 and wrapped around the speed governor rope 111. (Speed machine pulley) 201 (see FIG. 2) and the like. The speed governor 110 detects an overspeed of the car 103 and operates an emergency stop device 108 described later.

The governor rope 111 is wound between the tension pulley 114 disposed below the hoistway 102 and disposed at a position facing the sheave 201 and the sheave 201, and moves in conjunction with the car 103. That is, the tension pulley 114 is disposed at a position facing the sheave 201 in the vertical direction, and the governor rope 111 is installed between the sheave 201 and the tension pulley 114 in the vertical direction. Therefore, the tension pulley 114 may be regarded as a part of the speed governor 110.

The speed governor 110 includes a flyweight 202, a switch 203, a ratchet mechanism 204, a disc (disk-like member) 205, a first link mechanism (first lever mechanism) 206, a second link mechanism (second Lever mechanism) 210, catch weight 207, and other configurations associated therewith. Furthermore, the speed governor 110 is provided with a tension weight (not shown) that applies a load to the tension pulley 114.

The car 103 is provided with an emergency stop device 108 that grips the guide rail 107 with a wedge in an emergency, and an operating lever 109 that drives the emergency stop device 108 and is pivotally supported on the car 103 side. A speed adjusting rope 111 is connected to the operating lever 109. In addition, even when the car 103 and the counterweight 104 collide with the bottom of the hoistway for some reason, shock absorbers 112 and 113 are provided for stopping and stopping the shock so that the person in the car is safe. Reference numeral 112 denotes a counterweight-side shock absorber, and reference numeral 113 denotes a car-side shock absorber.

In addition, the elevator apparatus to which the present invention is applied is not limited to the configuration shown in FIG. For example, the speed governor 110 may be installed at a fixed portion (for example, the top of the guide rail 107) at the top of the hoistway 102 without providing a machine room above the hoistway 102.

Next, an outline of the governor 110 according to the present embodiment will be described with reference to FIGS. FIG. 2 is a schematic view of a first embodiment of the elevator governor according to the present invention. FIG. 3 is an enlarged front view showing a part of the elevator governor shown in FIG.

The speed governor 110 is supported by a speed governor frame (not shown) on which a sheave 201 around which an endless speed governor rope 111 is wound, and is driven by a flyweight 202 that rotates concentrically with the sheave 201. The speed of the car is regulated. Since the flyweight 202 rotates in synchronization with the sheave 201, the flyweight 202 receives a force radially outward of the sheave 201 by a centrifugal force according to the speed of the car and opens in the outer circumferential direction.

The flyweight 202 is configured to be swingable about a rotation shaft 208. The flyweight 202 rotates together with the sheave 201, and the attitude with respect to the sheave 201 changes according to the rotation speed of the sheave 201. When the flyweight 202 opens in the outer circumferential direction, the end 202b side opens outwardly and the claw 202a side enters radially inward with the rotation shaft 208 as the center. Two flyweights 202 are provided, and the two flyweights 202 are connected by a connecting member 214.

A mounting base 215 for mounting the biasing member 213 is fixed to the mounting portion of the rotating shaft 208 of the two flyweights 202. The biasing member 213 biases one flyweight 202 in the closing direction. In other words, the urging member 213 applies resistance to an operation in which the flyweight 202 attempts to open outward in the radial direction of the sheave 201 under the centrifugal force due to rotation.

The connecting member 214 transmits the urging force that one flyweight 202 receives from the urging member 213 to the other flyweight 202. As a result, the two flyweights 202 are given a resistance force from the biasing member 213 against an operation of receiving the centrifugal force due to the rotation and attempting to open the sheave 201 radially outward.

In a state where the sheave 201 is stationary, the urging member 213 urges the flyweight 202 in the closing direction so that the claw 202a of the flyweight 202 is positioned on the radially outer side of the sheave 201. Thereby, the nail | claw 202a of the fly weight 202 is hold | maintained in the position spaced apart from the trigger point (stimulus operation point) 204a of the ratchet mechanism 204. FIG. The trigger point 204a is a portion (ratchet claw) that engages with the claw 202a of the flyweight 202, and the ratchet mechanism 204 rotates together with the sheave 201 when the claw 202a of the flyweight 202 engages with the trigger point 204a.

When the ascending / descending speed of the car 103 exceeds the rated speed and reaches the first overspeed (usually 1.3 times the rated speed), the switch 203 is operated (in this case, the contact is opened), and the car 103 is moved. The power source of the hoisting machine 106 to be driven and the power source of the control device that controls the hoisting machine 106 are cut off.

Further, when the lowering speed of the car 103 exceeds the first overspeed and reaches the second overspeed (usually 1.4 times the rated speed), the speed governor 110 causes the end portion of the flyweight 202 to end. The 202b side opens further outward, and the claw 202a side further enters the radially inner side. Thereby, the claw 202a of the flyweight 202 is engaged with the trigger point 204a of the ratchet mechanism 204 connected to the disc 205.

The ratchet mechanism 204 includes a trigger point (ratchet) 204a concentrically assembled with the sheave 201, a disc 205 concentrically assembled with the trigger point 204a, and a pin 209 provided on the outer periphery of the disc 205. It consists of. The disc 205 is integrated with the ratchet mechanism 204 and rotates together with the ratchet mechanism 204. The pin 209 is an engaging portion (engaging pin) for connecting a first link mechanism (first lever mechanism) 206 described later to the ratchet mechanism 204.

The pin 209 and the disc 205 may be integrally formed, or the pin 209 configured as a separate member may be attached to the disc 205. The configuration related to the disc 205 and the pin 209 may be any configuration that can connect the trigger point 204 a and the first link mechanism 206 and transmit the rotation of the trigger point 204 a to the first link mechanism 206.

The first link mechanism 206 has two

links

206d and 206e extending in two directions from the rotating shaft 206b, and is bent at the rotating shaft 206b. A groove portion (engagement portion with pin 209) 206a is provided at one end portion (tip portion) of one link 206d, and a claw portion (engagement portion with catch weight 207) at one end portion (tip portion) of the other link 206e. ) 206c is provided.

The catch weight 207 is connected to the second link mechanism 210 by a connecting portion 210 a provided in the second link mechanism (second lever mechanism) 210. The catch weight 207 is connected to the first link mechanism 206 via the second link mechanism 210. The second link mechanism 210 is provided with a rotation shaft 210b at one end, and is rotatable about the rotation shaft 210b. A pin 210 c is provided at the other end of the second link mechanism 210. The pin 210 c is an engaging portion (engaging pin) that engages with the claw portion 206 c of the first link mechanism 206.

The groove portion 206a and the pin 209 are engaging portions that releasably connect the first link mechanism 206 and the ratchet mechanism 204. The claw portion 206c and the pin 210c are engagement portions that releasably connect the first link mechanism 206 and the second link mechanism 210.

When the claw 202a is engaged with the trigger point 204, the ratchet mechanism 204 is rotated by the rotational force of the sheave 201 and the flyweight 202. When the ratchet mechanism 204 rotates, one end portion of the link mechanism 206 in which the groove portion 206a is engaged with the pin 209 rotates in the arrow A direction around the rotation shaft 206b. At this time, the other end of the link mechanism 206 rotates in the direction of arrow B (upward).

When the other end of the first link mechanism 206 rotates in the direction of arrow B, the engagement between the claw 206c of the first link mechanism 206 and the pin 210c of the second link mechanism 210 is released. The second link mechanism 210, which is disengaged from the pin 210c, receives the weight of the catch weight 207, and the end on the pin 210c side rotates in the direction of arrow C around the rotation center 210b. Along with this, the catch weight 207 descends in the direction of arrow D from the self-supporting holding position, and the speed governor rope 111 is bitten between the catch plate 212 attached to the connecting portion frame 211 and the speed governor rope 111. Grip. As a result, the emergency stop device 108 provided on the car 103 operates to mechanically stop the car 103 in an emergency manner.

The holding mechanism of the catch weight 207 will be described with reference to FIG.

The catch weight 207 is normally held at a position where the governor rope 111 is not bitten by the first link mechanism 206 connected to the catch weight 207. When the first link mechanism 206 and the second link mechanism 210 are engaged, the catch weight 207 and the first link mechanism 206 can maintain their normally set postures independently.

In the conventional governor structure, a fly weight 202 is brought into direct contact with the first link mechanism 206 to operate the catch weight 207. However, in this embodiment, in order to improve the operation speed performance of the governor 110, the trigger points for operating the catch weight 207 are increased to multiple points (three or more points). For example, the speed governor 110 using the ratchet mechanism 204 needs to include a mechanism that further connects the first link mechanism 206 and the ratchet mechanism 204. At this time, since the catch weight 207 and the first link mechanism 206 are structured to maintain their postures independently, the elevator is allowed to run without noticing that the link structure 206 and the ratchet mechanism 204 are not connected. There is a possibility that.

In this case, when the elevator apparatus is in an overspeed state, although the flyweight 202 is engaged with the ratchet mechanism 204 and the ratchet mechanism 204 is rotated, the rotation of the ratchet mechanism 204 is transferred to the first link mechanism 206. It is not transmitted. Then, the catch weight 207 does not operate, and the governor rope 111 cannot be gripped by the catch weight 207.

In the present embodiment, when the first link mechanism 206 is not engaged with the ratchet mechanism 204, the catch weight 207 cannot be set on the first link mechanism 206. That is, when the first link mechanism 206 is not engaged with the ratchet mechanism 204, the first link mechanism 206 and the second link mechanism 210 cannot be engaged.

A structure for preventing the engagement between the first link mechanism 206 and the second link mechanism 210 when the first link mechanism 206 is not engaged with the ratchet mechanism 204 will be described with reference to FIGS. 4 is a cross-sectional view showing a cross section taken along the line IV-IV in FIG.

In this embodiment, as shown in FIG. 3, a disc (disk-shaped member) 205 is attached to the ratchet mechanism 204, and the disc 205 is cut out only at a portion (outer peripheral side of the pin 209) connected to the first link mechanism 206. (Linearly shaped portion) 301 is provided. Both ends of the notch 301 are connected by an arc-shaped outer peripheral surface 205b (see FIG. 2), and the arc-shaped outer peripheral surface 205b constitutes a connection blocking shape portion that blocks the connection between the first link mechanism and the catch weight 207. . A bracket 302 is provided on the link 206 d of the first link mechanism 206.

As shown in FIG. 4, the bracket 302 is attached to the surface of the first link mechanism 206 on the side facing the disc 205. The end of the bracket 302 on the groove 206a side is provided at a position where it interferes (contacts) with the arc 205b of the disc 205. That is, the bracket 302 constitutes a convex portion protruding from the link 206d of the first link mechanism 206 so as to interfere with the arc portion 205b of the disc 205.

In FIG. 4, the arc portion of the disk 205 is indicated by a broken line 205a. On the other hand, in the notch 301 of the disc 205, the bracket 302 is provided at a position where it does not interfere (contact) with the disc 205.

In the range of the notch 301 of the disc 205, the bracket 302 does not interfere with the disc 205, and the groove portion 206a of the first link mechanism 206 can be engaged with the pin 209. In the arc portion 205a of the disc 205, the bracket 302 interferes with the disc 205, and the first link mechanism 206 cannot take the posture shown in FIG. In other words, in the arc portion 205a of the circular plate 205, the first link mechanism 206 is rotated about the rotation shaft 206b with respect to the posture shown in FIG. The posture which can engage with the pin 210c of the link mechanism 210 cannot be taken.

In other words, in this embodiment, the disc 205 is in an attitude that allows the first link mechanism 206 to be connected to the catch weight 207 at a position other than the position where the first link mechanism 206 is engaged with the pin (engaging portion) 209. It has the connection prevention shape part (arc part) 205a which prevents becoming. That is, the connection preventing shape portion 205a holds the first link mechanism 206 in a posture in which the connection with the catch weight 207 is impossible.

Thus, the catch weight 207 cannot be set on the first link mechanism 206 via the second link mechanism 210. Therefore, the first link mechanism 206 and the catch weight 207 cannot maintain a self-supporting state. In this sense, the connection preventing shape portion 205a is a self-standing prevention shape portion that prevents the first link mechanism 206 and the catch weight 207 from standing independently.

In this embodiment, the first link mechanism 206 is provided with a bracket 302 that prevents the first link mechanism 206 from coming into contact with the disk 205 and becoming self-supporting except in a state where the first link mechanism 206 is engaged with the ratchet mechanism 204. Further, the disc 205 is provided with a notch 301 that prevents the bracket 302 and the disc 205 from contacting each other and enables the first link mechanism 206 to engage with the ratchet mechanism 204.

Accordingly, when the catch weight 207 and the first link mechanism 206 are set in a self-supporting state, the outer periphery 205a of the disc 205 is attached to the bracket 302 at a portion other than the pin 209 (arc portion 205a) attached to the disc 205. Cannot be set due to contact. The catch weight 207 can only be set with the first link mechanism 206 engaged with the pin 209. For this reason, it is possible to prevent the elevator apparatus from operating without setting the catch weight 207, and the catch weight 207 always operates when the elevator apparatus is abnormal.

In the configuration described above, the first link mechanism 206 and the bracket 302 are configured as separate members, and the bracket 302 is attached to the link 206d of the first link mechanism 206. However, the first link mechanism 206 and the bracket 302 are integrally formed. May be.

Next, a second embodiment of the governor according to this embodiment will be described with reference to FIG. FIG. 5: is a front view which expands and shows a part about 2nd Example of the governor for elevators which concerns on this invention. In addition, the same code | symbol is attached | subjected to the structure equivalent to what is shown in Example 1. FIG. Also, the description of the same structure as that of the first embodiment is omitted.

In this embodiment, the structure of the engaging portion that engages the first link mechanism 206 and the ratchet mechanism 204 is different from that of the first embodiment. Other configurations are the same as those in the first embodiment.

In this embodiment, a gap (groove shape portion or notch portion) 401 is provided in the disc 205 instead of the pin 209 and the notch 301 of the disc 205. The gap 401 has the same effect as the pin 209 and the notch 301 of the first embodiment. In addition, the groove portion 206 a is not provided in the first link mechanism 206, and one end portion 402 of the link 206 d of the first link mechanism 206 is configured to engage with the gap 401 of the disk 205. That is, the engaging portion on the first link mechanism 206 side is configured by the one end portion 402 of the link, and the engaging portion on the disk 205 side is configured by the gap 401. The configurations of the disk 205 and the first link mechanism 206 other than those described above are the same as those in the first embodiment.

In this embodiment, both end portions of the gap 401 are connected by an arc portion (outer periphery) 205 f of the disc 205 in the circumferential direction of the disc 205. The arc portion 205f constitutes a connection prevention shape portion (self-supporting prevention shape portion) 205a in the first embodiment. Similar to the first embodiment, in the connection preventing shape portion 205a, the catch weight 207 cannot be set to the first link mechanism 206 via the second link mechanism 210. Therefore, the first link mechanism 206 and the catch weight 207 cannot maintain a self-supporting state.

Accordingly, when the catch weight 207 and the first link mechanism 206 are set in a self-supporting state, the outer periphery of the disc 205 is provided on the first link mechanism 206 at a portion other than the gap 401 provided on the disc 205. Since the contact is made with 302, the catch weight 207 cannot be set on the first link mechanism 206. The catch weight 207 can be set only when the first link mechanism 206 is engaged with the gap 401. For this reason, the catch weight 207 always operates when the elevator apparatus is abnormal.

In addition, this invention is not limited to each above-mentioned Example, Various modifications are included. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Further, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

DESCRIPTION OF SYMBOLS 100 ... Building, 101 ... Machine room, 102 ... Hoistway, 103 ... Ride car, 104 ... Balance weight, 105 ... Main rope, 106 ... Hoisting machine, 107 ... Guide rail, 108 ... Emergency stop device, 109 ... Lifting Lever, 110 ... governor, 111 ... governor rope, 112 ... counterweight side shock absorber, 113 ... car side shock absorber, 201 ... governor sheave, 202 ... fly weight, 203 ... switch, 204 ... ratchet 205, disc (disc-shaped member), 206 ... first link mechanism (first lever mechanism), 207 ... catch weight, 210 ... second link mechanism (second lever mechanism), 301 ... notch (linear shape) Part), 302 ... bracket, 401 ... gap (groove-shaped part, notch part).

Claims

A governor rope that moves in conjunction with the ride car, a sheave around which the governor rope is wound, and a sheave that rotates together with the sheave, and has a posture with respect to the sheave according to the rotational speed of the sheave. A fly weight that changes, a catch weight that grips the governor rope with other members by dropping from a self-supporting holding position, and a change in posture of the fly weight that is connected to the catch weight and In an elevator governor comprising a first link mechanism that releases the connection with the catch weight.
A ratchet mechanism having a plurality of triggering operation points to be engaged with the flyweight, and a disc having an engagement portion integrated with the ratchet mechanism and engaged with the first link mechanism;
The disc prevents the first link mechanism from being connected to the catch weight at a position other than the position where the first link mechanism is engaged with the engaging portion. A speed governor for an elevator characterized by comprising:
In claim 1,
The disk includes a pin constituting the engaging portion and a linear shape portion formed on an outer peripheral side of the pin, and the connection prevention by an arc-shaped outer peripheral surface connecting both ends of the linear shape portion. Configure the shape part,
The first link mechanism has a convex portion that contacts the arcuate outer peripheral surface constituting the connection prevention shape portion.
In claim 1,
The disk has a groove-shaped portion that engages with one end of the link that constitutes the first link mechanism, and the connection preventing shape portion is formed by an arc-shaped outer peripheral surface that connects both ends of the groove-shaped portion. A speed governor for an elevator characterized by comprising.
In claim 1,
An elevator governor comprising a second link mechanism for connecting the first link mechanism and the catch weight.
A car that is suspended by a main rope and moves up and down the hoistway, an emergency stop device provided in the car, and a governor that detects an overspeed of the car and operates the emergency stop device. In elevator equipment,
An elevator apparatus comprising the governor according to any one of claims 1 to 4 as the governor.