WO2018047334A1

WO2018047334A1 - Speed governor and elevator device

Info

Publication number: WO2018047334A1
Application number: PCT/JP2016/076793
Authority: WO
Inventors: 雄大田中; 中山　徹也; 福田　敏行; 洋輔久保
Original assignee: 株式会社日立製作所
Priority date: 2016-09-12
Filing date: 2016-09-12
Publication date: 2018-03-15
Also published as: CN109476451A; JPWO2018047334A1; JP6585852B2

Abstract

Provided are: a speed governor wherein the accuracy and strength of the facing sections of a frame can be ensured, the facing sections having a pair of bearings arranged thereon; and an elevator device. This speed governor comprises: a frame; bearings provided to the frame; a main shaft rotatably supported by the bearings; a rope sheave which is affixed to the main shaft and on which an elevator car speed governor rope is wound; a pendulum which is caused to pivot by centrifugal force acting when the rope sheave is rotated; a pendulum pressing member which presses the pendulum in the direction opposite the pivoting direction of the pendulum and which permits the pendulum to pivot when centrifugal force is greater than or equal to a predetermined value; and a ratchet which rotates while engaging with the pendulum having been caused to pivot by centrifugal force. The frame is configured including a first frame and a second frame. The bearings are a first bearing and a second bearing, which are provided as a pair on the facing surfaces of the first frame and the second frame. The first frame and the second frame are connected by a plurality of reinforcement members which have the same length and which are arranged so as to surround the main shaft.

Description

Speed governor and elevator device

The present invention relates to a speed governor and an elevator apparatus.

In general, an elevator apparatus is provided with a governor for constantly monitoring the ascending / descending speed of a car and emergency stopping a car that has fallen into a predetermined overspeed state. Specifically, the governor is a power source for the hoisting machine that drives the car when the car's lifting speed exceeds the rated speed and reaches the first overspeed (usually 1.3 times the rated speed). And the power supply of the control apparatus which controls this hoisting machine is cut off, respectively. The governor operates the emergency stop device provided on the car when the car descending speed exceeds the first overspeed and reaches the second overspeed (usually 1.4 times the rated speed). Let the car stop mechanically.

Such a speed governor has a main shaft rotation system in which the main shaft connected to the encoder rotates together with the sheave to transmit the rotation of the sheave to the encoder for the purpose of detecting the speed or position of the car. What is constituted in this way generally supports the main shaft with a bearing arranged in a pair on the opposing portion of the integrally molded frame.

On the other hand, in the speed governor, in order to improve assembly productivity, the one described in Patent Document 1 includes a reference frame, a cover frame that is fastened to the reference frame, and a reference frame. And a spacer portion for maintaining a distance between the cover frame and the cover frame has been proposed.

Japanese Patent Laid-Open No. 06-32554

Patent Document 1 was a method of fixing the main shaft (pulley shaft) of the governor, but in a speed governor employing a different main shaft rotation method, a pair of bearings (ball bearings) are arranged. If the concentric accuracy and the parallel accuracy at the opposed portion of the frame are not ensured, the main shaft tilts. If the main shaft is largely tilted, the inner and outer rings of the bearings supporting the main shaft tilt beyond the allowable value. As a result, the balls of the bearing come into contact with the edges of the inner ring and the outer ring and are damaged, and the life of the bearing is shortened. In order to avoid this, it is necessary to increase the processing accuracy of the frame and eliminate the relative position shift between the two bearings. However, in the integrally molded frame, the concentric accuracy between the opposed portions where the bearings are arranged due to the deflection during processing and the parallelism are provided. It was difficult to increase accuracy and it was difficult to properly arrange the spindle.

On the other hand, the split-type frame as described in Patent Document 1 ensures accuracy in a state where the frames are assembled together, due to the processing accuracy of the bending portions applied to the frames that fasten the frames, and It has been difficult to ensure the required strength around the bearing that supports the main shaft.

An object of the present invention is to provide a speed governor and an elevator apparatus that can ensure the accuracy and strength at the facing portion of a frame where a pair of bearings are arranged.

In order to solve the above problems and achieve the object of the present invention, a speed governor of the present invention includes a frame, a bearing provided on the frame, a main shaft rotatably supported by the bearing, and a main shaft. A sheave on which a rope for controlling the speed of the car is fixed, a pendulum that is rotated by centrifugal force that acts when the sheave rotates, and the pendulum is attached in a direction against the rotation of the pendulum. When the centrifugal force reaches a predetermined value or more, the pendulum biasing member that allows the pendulum to rotate, and a ratchet that engages and rotates the pendulum rotated by the centrifugal force. In the speed machine, the frame includes a first frame and a second frame, and the bearing includes a first bearing and a second frame provided in pairs on opposing surfaces of the first frame and the second frame. A bearing, wherein the first frame and the first frame Frame are arranged so as to surround the main shaft are connected by a reinforcing member of a plurality of identical length.

The elevator apparatus according to the present invention includes a car that moves up and down in the hoistway, a counterweight that moves up and down in the hoistway, a main rope that holds the car and the counterweight, and the main rope is wound. A traction sheave that is hung and drives the main rope to raise and lower the car, a speed-control rope that is connected to the car and moves with the car, and an emergency stop device that makes the car emergency stop And a speed governor that operates the emergency stop device to emergency stop the car when the ascending / descending speed of the car reaches a predetermined overspeed, the elevator device comprising: The machine includes a frame including a first frame and a second frame, a first bearing and a second bearing provided in pairs on opposing surfaces of the first frame and the second frame, A main shaft rotatably supported by the bearing and the second bearing, a sheave fixed to the main shaft and wound with a rope for adjusting the speed of a car, and a centrifugal force acting when the sheave rotates. A pivoting pendulum, a pendulum biasing member that biases the pendulum in a direction against the pivoting of the pendulum, and allows the pendulum to pivot when the centrifugal force exceeds a predetermined value; and the centrifugal force A ratchet that engages and rotates with the pendulum rotated by, and a plurality of reinforcing members that are connected to connect the first frame and the second frame and that surround the main shaft. It has.

According to the speed governor and the elevator apparatus configured as described above, it is possible to ensure the accuracy and strength at the opposing portion of the frame where the paired bearings are arranged.

Note that problems, configurations, and effects other than those described above will be clarified by the following description of embodiments.

It is a block diagram which shows the structural example of the elevator apparatus of one Example. It is a front view which shows the structural example of the governor of one Example. It is sectional drawing which shows the structural example of the speed governor of one Example.

Hereinafter, embodiments for implementing a speed governor and an elevator apparatus according to the present invention will be described with reference to FIGS. In the drawings, the same or similar components are denoted by the same reference numerals, and repeated description is omitted.
<Elevator equipment>
FIG. 1 is a configuration diagram illustrating a configuration example of an elevator apparatus according to an embodiment of the present invention.

As shown in FIG. 1, the elevator apparatus of the present embodiment includes a lifting body (cage) 300, a counterweight 400, a main rope 500, a traction sheave 600, a guide rail 700, an emergency stop device 800, An operating lever 900 and a governor 200 are provided.

The elevating body 300 is installed in a hoistway 1100 provided in the building 1000. The elevating body 300 has a plurality of guide devices (not shown) and is slidably engaged with the guide rail 700. Therefore, the elevating body 300 moves up and down in the hoistway 1100 while being guided by the guide rail 700.

Hereinafter, the direction in which the lifting body 300 and the counterweight 400 are lifted and lowered is referred to as the lifting direction. That is, the guide rail 700 guides the lifting body 300 in the lifting direction.

The counterweight 400 has a plurality of guide devices (not shown). The plurality of guide devices of the counterweight 400 are slidably engaged with guide rails (not shown) fixed to the wall surface of the hoistway 1100. Accordingly, the counterweight 400 moves up and down in the hoistway 1100 while being guided in the elevating direction by a guide rail (not shown).

The elevating body 300 and the counterweight 400 are suspended from the main rope 500. The traction sheave 600 is disposed in a machine room 1200 provided in the building 1000. A main rope 500 is wound around the traction sheave 600. In the machine room 1200, a drive device (not shown) for driving and braking the traction sheave 600 is disposed. The drive device causes the main rope 500 to be frictionally driven by rotating the traction sheave 600, thereby lifting and lowering the lifting body 300 and the counterweight 400.

The emergency stop device 800 is provided on the lifting body 300, holds the guide rail 700 with a wedge in an emergency, and stops the lifting body 300 from descending. The operation lever 900 is pivotally supported by the elevating body 300 and drives the emergency stop device 800. The operation lever 900 is connected to a speed controlling rope 1 described later.

The speed governor 200 includes a power source for a driving device that drives the traction sheave 600 and the driving thereof when the lifting speed of the lifting body 300 exceeds the rated speed and reaches a first overspeed (for example, 1.3 times the rated speed). Each power supply of a control device (not shown) for controlling the device is shut off. Further, when the lowering speed of the lifting body 300 reaches the second overspeed (for example, 1.4 times the rated speed), the governor 200 operates the operation lever 900 provided on the lifting body 300 to stop the emergency stop. The apparatus 800 is operated. Thereby, the lifting body 300 is mechanically stopped in an emergency.
<Governor>
Next, the configuration of the governor 200 will be described with reference to FIGS. 2 and 3.

FIG. 2 is a front view showing a configuration example of the governor 200. FIG. 3 is a cross-sectional view illustrating a configuration example of the governor 200.

As shown in FIGS. 2 and 3, the speed governor 200 includes a main shaft 2, a frame 3, a sheave 4, an encoder 5, pendulums 6 and 7, a toothed ratchet 8, and a shoe mechanism 9. I have. The main shaft 2 is rotatably supported by a bearing provided on the frame 3 described later.

As shown in FIG. 3, the frame 3 has a two-part structure composed of a first frame 3a having a substantially U-shaped cross section and a substantially I-shaped second frame 3b, and the folded portion of the first frame 3a. A box is formed by connecting the second frame 3b to 3c with a fixing bolt 3d. Moreover, the 1st bearing 10 and the 2nd bearing 11 which used the ball bearing are arrange | positioned at the opposing surface of the 1st frame 3a and the 2nd frame 3b, and the main shaft 2 can rotate through these bearings. It is supported by. Here, an example in which the first frame and the second frame have substantially U-shaped and I-shaped cross sections will be described. The frame may have a substantially L-shaped cross section.

For example, three reinforcing pins 12a to 12c having the same length are disposed between the first frame 3a and the second frame 3b so as to surround the main shaft 2. Both ends of these reinforcing pins 12a to 12c are threaded, one end is inserted into a through hole formed in the first frame 3a, and the other end is inserted into a through hole formed in the second frame 3b. In this state, when the nut 13 is screwed, the reinforcing pins 12a to 12c are fixed between the first frame 3a and the second frame 3b. When the frame 3 is assembled, by using an assembly worker (not shown), concentric accuracy at the opposed portions of the first frame 3a and the second frame 3b where the paired first bearing 10 and second bearing 11 are arranged. In addition, the main shaft 2, the first bearing 10, and the second bearing 11 can be easily installed in a state where the parallel accuracy is ensured.

The endless speed governing rope 1 is wound around the sheave 4 of the speed governor 200. The speed regulating rope 1 is connected to an elevating body 300 (see FIG. 1) and moves together with the elevating body 300 to rotate the sheave 4. A sheave 91 around which the speed controlling rope 1 is wound is disposed at the lower part of the hoistway 1100.

The encoder 5 is disposed on the second frame 3b so as to face the main shaft 2 via the bracket body 14, and detects the rotation of the main shaft 2 through the projecting portion 2a to detect the position or speed of the elevating body 300. ing. The bracket body 14 incorporates the above-described second bearing 11 together with the encoder 5. The bracket body 13 is fixed to the second frame 3 b, so that the second bearing 11 is placed at a position opposite to the first bearing 10. The structure is arranged. The speed governor to which the present invention is applied is not necessarily limited to the one in which the encoder 5 is arranged.

The pendulums 6 and 7 are formed in a substantially arc shape, and are rotatably supported by an arm 15 that rotates together with the sheave 4. When the arm 15 rotates together with the sheave 4, the pendulums 6 and 7 are rotated by centrifugal force. A balance spring 16 and a pendulum claw 17 are provided at the end of the pendulum 6.

The balance spring 16 is a specific example of the pendulum urging member of the present embodiment, and generates a resistance against the displacement of the other end of the pendulum 6 in the direction approaching the main shaft 2. That is, when the centrifugal force acting on the pendulums 6 and 7 exceeds the resistance force of the balance spring 16, the balance spring 16 is elastically deformed (compressed), and the pendulums 6 and 7 rotate.

The pendulum claw 17 protrudes from the inner side (main shaft 2 side) side of the pendulum 6. When the pendulums 6 and 7 are rotated by centrifugal force and the other end portion of the pendulum 6 is displaced in a direction approaching the main shaft 2, the pendulum claw 17 is engaged with a tooth portion (not shown) of the toothed ratchet 8 to be described later. Match.

Detecting

protrusions

6 a and 7 a are provided at one end of the pendulums 6 and 7. The

detection protrusions

6 a and 7 a protrude from the outer side (opposite side of the main shaft 2) of the pendulums 6 and 7. The

detection protrusions

6a and 7a come into contact with a detection switch (not shown) when the pendulums 6 and 7 are rotated.

The toothed ratchet 8 shows a specific example of the rotating body of the present embodiment, and is rotatably supported by the main shaft 2. The toothed ratchet 8 is formed in a disk shape, and one plane faces the pendulums 6 and 7. A tooth part (not shown) is formed on the outer peripheral surface of the toothed ratchet 8. The toothed portion of the toothed ratchet 8 is engaged with the pendulum claw 17 of the rotated pendulum 6.

The shoe mechanism 9 includes a connection lever 21, a spring shaft 22, a gripping arm 23, an urging spring 24, and a braking shoe 25.

The connection lever 21 is formed in a rod shape and is rotatably supported by a connection shaft 26 fixed to the toothed ratchet 8. The connection shaft 26 protrudes from the other plane of the toothed ratchet 8 and rotatably supports one end portion of the connection lever 21.

The spring shaft 22 is inserted into the other end of the connection lever 21. A spring receiving portion is provided at the end of the spring shaft 22 opposite to the connection lever 21. The spring shaft 22 passes through the gripping arm 23 and the biasing spring 24.

The gripping arm 23 has a shaft penetrating portion 23a through which the spring shaft 22 penetrates and a supported portion 23b continuous to the shaft penetrating portion 23a. The shaft penetrating portion 23 a is disposed between the connection lever 21 and the biasing spring 24. The supported portion 23 b is rotatably supported by the frame 3 via a shaft 27.

The urging spring 24 is a compression spring, for example, and urges the shaft penetrating portion 23a of the gripping arm 23 toward the connection lever 21 side. That is, one end of the biasing spring 24 is in contact with the spring receiving portion, and the other end of the biasing spring 24 is in contact with the shaft penetrating portion 23 a of the gripping arm 23.

In this embodiment, the compression coil spring is applied as the biasing member that biases the shaft penetrating portion 23a of the gripping arm 23 toward the connection lever 21, but the biasing force that biases the gripping arm 23 of the present embodiment is used. The member may be other than the compression coil spring, and other elastic members such as rubber may be applied.

The brake shoe 25 is rotatably supported by the supported portion 23 b of the gripping arm 23 and faces the speed regulating rope 1 wound around the sheave 4. The brake shoe 25 is pressed against the speed regulating rope 1 when the shoe mechanism 9 is operated in accordance with the rotation of the toothed ratchet 8.
[Speed governor operation]
Next, the operation of the governor 200 during normal operation will be described with reference to FIGS.

When the elevating body 300 (see FIG. 1) descends, the speed controlling rope 1 moves together with the elevating body 300 to rotate the sheave 4. Thereby, when the centrifugal force acts on the pendulums 6 and 7 and the centrifugal force exceeds the resistance force of the balance spring 16 that is the pendulum urging member, the pendulums 6 and 7 rotate.

When the descending speed of the elevating body 300 (see FIG. 1) reaches a first overspeed (for example, 1.3 times the rated speed), one end of the pendulums 6 and 7 comes into contact with a detection switch (not shown). Thereby, the governor 200 detects that the raising / lowering speed of the raising / lowering body 300 has reached the first overspeed. Then, the speed governor 200 shuts off the power source of a driving device (not shown) that drives the traction sheave 600 and the power source of a control device (not shown) that controls the driving device.

When the descending speed of the elevating body 300 reaches the second overspeed (for example, 1.4 times the rated speed), the pendulum claw 17 of the rotated pendulum 6 engages with the tooth portion of the toothed ratchet 8. The toothed ratchet 8 is rotated. That is, the governor 200 performs a trip operation. When the toothed ratchet 8 rotates, the connecting lever 21 moves and the gripping arm 23 rotates.

When the gripping arm 23 rotates, the brake shoe 25 is pressed against the speed control rope 1 wound around the sheave 4 to apply tension to the speed control rope 1. Thereby, the movement of the rope 1 for speed control is stopped, and the raising / lowering body 300 continues descent | fall. As a result, the operating lever 900 (see FIG. 1) connected to the speed controlling rope 1 is pulled up, and the emergency stop device 800 is operated to mechanically stop the elevator 300 mechanically.

As described above, in the present embodiment, the frame 3 has a two-part structure of the first frame 3a and the second frame 3b, so that the first bearing 10 and the second bearing 11 are arranged at the opposing portion of the frame 3. Machining accuracy can be increased easily. In addition, by arranging the reinforcing pins 12a to 12c having the same length between the first frame 3a and the second frame 3b so as to surround the main shaft 2, regardless of the processing accuracy of the bent portion of the frame 3, the first The concentric accuracy and the parallel accuracy on the opposing surfaces of the one frame 3a and the second frame 3b can be ensured, the first bearing 10 and the second bearing 11 to be paired are securely arranged at appropriate positions, and the frame 3 Strength can be improved. Therefore, the inclination of the main shaft 2 can be suppressed, and the inclinations of the inner and outer rings of the first bearing 10 and the second bearing 11 can be kept within an allowable value, and the shortening of the life of both bearings can be prevented.

In the above, the governor and the elevator apparatus of the present embodiment have been described including their effects. However, the governor and the elevator apparatus of the present invention are not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the invention described in the claims. is there.

For example, in the above-described embodiment, the reinforcing pins 12a to 12c arranged between the first frame 3a and the second frame 3b are the opposing portions of the frame 3 on which the first bearing 10 and the second bearing 11 are arranged. Although provided to ensure accuracy and strength, at least one of the reinforcing pins 12a to 12c may have other functions. For example, it can also be used as a shaft that rotatably supports the supported portion 23b of the gripping arm 23.

In the above embodiment, the configuration in which the reinforcing pin is provided so as to surround the main shaft 2 has been described. However, a rectangular reinforcing member may be used instead of the reinforcing pin.

1 Speed control rope, 2 main shaft, 3 frame, 3a 1st frame, 3b 2nd frame, 3c folding part, 3d fixing bolt, 4, 91 sheave, 5 encoder, 6, 7 pendulum, 6a, 7a detection bump Part, 8 toothed ratchet, 9 shoe mechanism, 10 1st bearing, 11 2nd bearing, 12a, 12b, 12c reinforcement pin, 13 nut, 14 bracket body, 15 arm, 16 balance spring, 17 pendulum claw, 21 connection lever , 22 spring shaft, 23 gripping arm, 23a shaft penetrating portion, 23b supported portion, 24 biasing spring, 25 braking shoe, 26 connecting shaft, 27 shaft, 200 speed governor, 300 lifting body, 400 counterweight, 500 main Rope, 600 traction sheave, 700 guide rail, 800 emergency stop device, 900 operation Bar, 1000 buildings, 1100 hoistway, 1200 machine room

Claims

Frame,
A bearing provided on the frame;
A main shaft rotatably supported by the bearing;
A sheave fixed to the main shaft and wound with a rope for controlling the speed of the car,
A pendulum that rotates by centrifugal force acting when the sheave rotates;
Urging the pendulum in a direction against the rotation of the pendulum, and when the centrifugal force reaches a predetermined value or more, a pendulum urging member that permits the pendulum to rotate,
A ratchet that rotates by engaging with the pendulum rotated by the centrifugal force;
In the governor consisting of
The frame includes a first frame and a second frame,
The bearings are a first bearing and a second bearing provided in pairs on opposing surfaces of the first frame and the second frame,
The speed governor, wherein the first frame and the second frame are connected by a plurality of reinforcing members having the same length arranged so as to surround the main shaft.
The governor according to claim 1,
The first frame and the second frame are
Each has a substantially U-shaped, I-shaped cross section, or
Both have a substantially L-shaped cross section,
The speed governor, wherein an end of the first frame is in contact with an end of the second frame.
The governor according to claim 2,
A speed governor characterized in that an end of the first frame and an end of the second frame are fixed with fixing bolts.
The governor according to claim 1,
A ball speed bearing is used for the first bearing and the second bearing.
A car that goes up and down in the hoistway,
A counterweight that moves up and down in the hoistway;
A main rope for suspending the car and the counterweight;
A traction sheave around which the main rope is wound, and driving the main rope to raise and lower the car;
A speed control rope connected to the car and moving with the car;
An emergency stop device for emergency stopping the car;
A speed governor for operating the emergency stop device to emergency stop the car when the raising / lowering speed of the car reaches a predetermined overspeed;
An elevator apparatus comprising:
The governor is
A frame configured to include a first frame and a second frame;
A first bearing and a second bearing provided in pairs on opposing surfaces of the first frame and the second frame;
A main shaft rotatably supported by the first bearing and the second bearing;
A sheave fixed to the main shaft and wrapped around a rope for controlling the speed of a car;
A pendulum that rotates by centrifugal force acting when the sheave rotates;
Urging the pendulum in a direction against the rotation of the pendulum, and when the centrifugal force reaches a predetermined value or more, a pendulum urging member that permits the pendulum to rotate,
A ratchet that rotates by engaging with the pendulum rotated by the centrifugal force;
A plurality of reinforcing members of the same length, which are arranged to connect the first frame and the second frame and surround the main shaft,
An elevator apparatus comprising: