WO2010084564A1

WO2010084564A1 - Safety device for elevator

Info

Publication number: WO2010084564A1
Application number: PCT/JP2009/050727
Authority: WO
Inventors: 直之丸山
Original assignee: 三菱電機株式会社
Priority date: 2009-01-20
Filing date: 2009-01-20
Publication date: 2010-07-29

Abstract

A safety device for elevator, wherein an engaging disc having a small diameter and rotated together with a rotating body is provided coaxial with the rotating body. The engaging disc can rotate relative to the rotating body and is usually rotated together with the rotating body. Rotation of the engaging disc is mechanically stopped by an engaging-disc stopping mechanism. The engaging-disc stopping mechanism is operated by an actuator. When rotation of the engaging disc is stopped by the engaging-disc stopping mechanism, rotation of the rotating body relative to the engaging disc is transmitted to a rotating-body stopping mechanism by an interlock mechanism, and the rotating body is stopped by the rotating-body stopping mechanism.

Description

Elevator safety device

This invention relates to an elevator safety device that operates an emergency stop means by driving an actuator.

In a conventional elevator emergency stop system, a pressing shoe for restraining a governor rope is displaced between an open position and a restraining position by an electromagnetic actuator (see, for example, Patent Document 1, FIG. 12, and FIG. 13). ).

In another conventional elevator emergency stop system, a latch is rotatably attached to a movable base that can be displaced horizontally with respect to a frame. The latch is rotated by an electromagnetic actuator and engaged with a ratchet that is rotated integrally with the governor sheave. When the latch is engaged with the ratchet, the movable base is displaced by the rotation of the ratchet, the pressing shoe is displaced to the restraining position in conjunction with the movable base, and the governor rope is restrained (for example, Patent Document 1, (See FIG. 14).

WO2005 / 102899

In the case of the conventional emergency stop system as described above, if an attempt is made to install a mechanical operation mechanism in case of an electromagnetic actuator failure, the configuration of the speed governor becomes complicated and the speed governor becomes larger and wider. Installation space is required.

The present invention has been made to solve the above-described problems, and an elevator capable of efficiently installing an electric operation mechanism and a mechanical operation mechanism without increasing the size of the governor. The purpose is to obtain a safety device.

The elevator safety device according to the present invention includes a first rotating body that is provided at one of the upper and lower parts of the hoistway and that is rotated as the car is raised and lowered, and mechanically overspeeds the car. The speed governor to be detected, the second rotating body provided at the other of the upper and lower parts of the hoistway and rotated in accordance with the raising and lowering of the car, the rotation of at least one of the first and second rotating bodies is stopped. Emergency stop means for emergency stop of the car, and a first actuator that is provided in the second rotating body and operates in response to a stop command signal from the control system, and corresponds to the downward movement of the car A first starting device for stopping the rotation of the second rotating body to the motor, and a second actuator provided on the second rotating body and operating in response to a stop command signal from the control system, Those who respond to the rise of And a second actuating device for stopping the rotation of the second rotary member to.

It is a block diagram which shows the elevator by Embodiment 1 of this invention. It is a front view which shows the governor of FIG. It is a front view which shows operation | movement of an upper starting device when electricity supply to the electromagnetic actuator of FIG. 2 is interrupted | blocked. It is a front view which shows the state of the back | latter stage of FIG. It is a front view which shows the state of the back | latter stage of FIG. FIG. 3 is a front view showing a state during a return operation of the governor of FIG. 2. It is a front view which shows the state which the flyweight of the governor of FIG. 2 expanded. It is a front view which shows the principal part of the governor by Embodiment 2 of this invention. It is a front view which shows the principal part of the governor by Embodiment 3 of this invention. It is a block diagram which shows the engagement state of the trip lever and trigger plate of FIG. It is a front view which shows operation | movement of an upper starting device when the electricity supply to the electromagnetic actuator of FIG. 9 is interrupted | blocked. It is a front view which shows the state of the back | latter stage of FIG. It is a front view which shows the principal part of the safety device for elevators by Embodiment 4 of this invention.

Preferred embodiments of the present invention will be described below with reference to the drawings.
Embodiment 1 FIG.
FIG. 1 is a block diagram showing an elevator according to Embodiment 1 of the present invention. In the figure, a driving device 2 is installed in the upper part of the hoistway 1. A main rope 3 as a suspension means is wound around the drive sheave 2 a of the drive device 2. A car 4 is suspended from one end of the main rope 3, and a counterweight 5 is connected to the other end of the main rope 3. In the hoistway 1, a pair of car guide rails 6 that guide the raising and lowering of the car 4 and a pair of weight guide rails (not shown) that guide the raising and lowering of the counterweight 5 are installed.

At the bottom of the car 4, an emergency stop device 7 is provided as an emergency stop means for engaging with the car guide rail 6 to stop the car 4 in an emergency. A governor support member 8 is fixed in the vicinity of the upper end of the car guide rail 6. On the governor support member 8, a governor 9 for detecting the overspeed of the car 6 and operating the emergency stop device 7 is supported.

In the vicinity of the pit of the hoistway 1, a tensioning vehicle device 10 is provided. An upper end portion and a lower end portion of the governor rope 11 are wound around the governor 9 and the tensioning vehicle device 10, respectively. The governor rope 11 is connected to the safety device 7 through a lever 12 and is circulated and moved as the car 4 is raised and lowered.

The governor 9 is provided with an upper activation device 13 that operates the emergency stop device 7 in response to a stop command signal. The tensioning vehicle device 10 is provided with a lower activation device 14 that operates the emergency stop device 7 in response to a stop command signal.

FIG. 2 is a front view showing the governor 9 of FIG. In the figure, a sheave 21 as a rotating body around which the governor rope 11 is wound is supported by a base 23 so as to be rotatable about a sheave shaft 22. The sheave 21 is rotated as the car 4 moves up and down. Further, the sheave 21 is rotated in a direction corresponding to the traveling direction of the car 4 at a speed corresponding to the traveling speed of the car 4.

A first flyweight 25a that is rotatable about the pin 24a and a second flyweight 25b that is rotatable about the pin 24b are attached to the side surface of the sheave 21. These

flyweights

25 a and 25 b are connected to each other by a link 26.

A working piece 37 is fixed to one end of the first flyweight 25a. The first and

second flyweights

25 a and 25 b are rotated by centrifugal force due to the rotation of the sheave 21. Thereby, the operating piece 37 is displaced radially outward of the sheave 21. Between the other end of the first flyweight 25a and the sheave 21, a balance spring 27 that opposes centrifugal force is provided.

A car stop switch 28 for operating a brake device (not shown) of the driving device 2 is attached to the base 23. The car stop switch 28 has a switch lever 28 a operated by an operating piece 37.

The sheave shaft 22 is provided with an engagement disk (small ratchet) 42 that can rotate relative to the sheave 21. The engagement disk 42 has a smaller diameter than the sheave 21. Further, the engagement disk 42 is rotated integrally with the sheave 21 at the normal time. A plurality of teeth are continuously provided on the outer periphery of the engagement disk 42 over the entire periphery. A cylindrical guide portion 42 a surrounding the sheave shaft 22 is provided on one side surface of the engagement disk 42.

The rotation restriction part 42b is provided in the guide part 42a. The rotation restricting portion 42b protrudes in the tangential direction from the outer peripheral portion of the guide portion 42a. Moreover, the front-end | tip part of the rotation control part 42b is bent at right angle, and is contact | abutting to the spoke part of the sheave 21 at normal time. Thereby, the relative rotation of the engagement disk 42 in the counterclockwise direction (FIG. 2) with respect to the sheave 21 is restricted, and only the relative rotation in the clockwise direction (FIG. 2) is allowed.

A claw 29 is provided on the side surface of the sheave 21 so as to be rotatable about the pin 24a. A base end portion of an L-shaped spring wire 43 serving as a transmission member is wound around the guide portion 42a by about 90 degrees. The tip of the spring wire 43 is connected to one end of the claw 29.

At the other end of the claw 29, an abutting piece 29a that abuts on the first flyweight 25a is provided. Thereby, the claw 29 is rotated counterclockwise in conjunction with the rotation of the first flyweight 25a in the counterclockwise direction (FIG. 2).

The base 23 is provided with a main ratchet (large ratchet) 30 that can rotate around the sheave shaft 22. The main ratchet 30 has a larger diameter than the engagement disk 42. A plurality of teeth are continuously provided on the outer periphery of the main ratchet 30 over the entire circumference. When the first flyweight 25a is rotated by a preset amount while the sheave 21 is rotating in the counterclockwise direction (FIG. 2), the claw 29 is engaged with the teeth of the main ratchet 30.

The main ratchet 30 is equipped with a locking arm 41 that can rotate about a shaft 41a. The shaft 41 a is provided in the middle portion of the locking arm 41 in the longitudinal direction. A stopper portion 41b that engages with the teeth of the engagement disk 42 is provided in the middle portion of the locking arm 41, that is, in the vicinity of the shaft 41a. A tension spring 44 is provided between the base 23 and one end (upper end) of the locking arm 41. The tension spring 44 urges the locking arm 41 in the direction in which the stopper portion 41b engages with the teeth of the engagement disc 42 (clockwise in FIG. 2).

A pin 41 c is provided on the other end (lower end) of the locking arm 41. A link plate 45 as a link member is connected to the pin 41c. The distance from the shaft 41a to the pin 41c is larger than the distance from the shaft 41a to the connecting portion of the tension spring 44.

The link plate 45 is provided with a long hole 45a into which the pin 41c is inserted. An electromagnetic actuator 46 is fixed to the base 23. The electromagnetic actuator 46 includes a mover 46a connected to the link plate 45, and an electromagnetic magnet 46b that attracts the mover 46a.

The mover 46a is horizontally positioned between a normal position attracted toward the electromagnetic magnet 46b (FIG. 2) and a stop position (FIG. 3) protruding from the electromagnetic magnet 46b and engaging the stopper portion 41b with the engaging disk 42. Is displaceable.

Further, the electromagnetic actuator 46 has a very small movable element when the link plate 45 is close to about 5 mm or less from the electromagnetic magnet (actuator body) 46b and the load of the tension spring 44 does not act on the movable element 46a. It has the ability to suck only the sliding loss load of 46a. The electromagnetic actuator 46 overcomes the load of the pulling spring 44 in a state where the movable element 46a is in close contact with the electromagnetic magnet 46b, and holds the movable element 46a so that the locking arm 41 does not rotate in the clockwise direction in the figure. have.

The upper activation device 13 includes a locking arm 41, an engagement disk 42, a spring wire 43, a tension spring 44, a link plate 45, and an electromagnetic actuator 46. The structure of the lower activation device 14 is the same as that of the upper activation device 13.

A shoe 32 that is pressed against the governor rope 11 is rotatably attached to an arm 31 that is rotatably attached to the base 23. A spring shaft 33 is passed through the spring receiving portion 31 a of the arm 31. A connection lever 34 is connected between one end of the spring shaft 33 and the main ratchet 30. A spring receiving member 35 is provided at the other end of the spring shaft 33. A rope gripping spring 36 for pressing the shoe 32 against the governor rope 11 is provided between the spring receiving portion 31 a and the spring receiving member 35.

In the first embodiment, the rotating body stopping mechanism that mechanically stops the rotation of the sheave 21 includes an arm 31, a shoe 32, a spring shaft 33, a connection lever 34, a spring receiving member 35, and a rope gripping spring 36. Yes.

The engagement disk stop mechanism that mechanically stops the rotation of the engagement disk 42 includes a locking arm 41, a tension spring 44, and a link plate 45. Further, the electromagnetic actuator 46 operates the engagement disk stop mechanism to stop the rotation of the engagement disk 42.

Furthermore, the interlocking mechanism has a main ratchet 30, a claw 29, and a spring wire 43. The interlocking mechanism operates the rotating body stopping mechanism in conjunction with the relative rotation of the sheave 21 with respect to the engaging disk 42 when the rotation of the engaging disk 42 is stopped by the engaging disk stopping mechanism. The car 21 is stopped.

Specifically, the main ratchet 30 operates the rotating body stopping mechanism by being rotated. The claw 29 engages with the main ratchet 30 by rotating the sheave 21 relative to the engagement disc 42 to rotate the main ratchet 30 together with the sheave 21. The spring wire 43 rotates the claw 29 in a direction to engage with the main ratchet 30 by rotating the sheave 21 relative to the engagement disk 42.

The stop operation transmission mechanism includes the engagement disk stop mechanism, the interlocking mechanism, and the engagement disk 42 described above, and until the sheave 21 is stopped after the mover 46a is displaced to the stop position. As the sheave 21 rotates, the mover 46a is returned to the normal position.

Next, the operation will be described. During normal traveling and stopping of the car 4, the electromagnetic actuator 46 is always energized. On the other hand, the brake 4 of the drive device 2 occurs or the traction force between the main rope 3 and the drive sheave 2a is lost for some reason, and the car 4 is intended by the unbalanced load. If the main rope 3 is moved, or if the cutting of the main rope 3 is detected, a stop command signal is issued from the control system, and the energization to the electromagnetic actuator 46 is cut off.

FIGS. 3 to 5 are front views showing the operation of the upper activation device 13 when the energization to the electromagnetic actuator 46 of FIG. 2 is cut off. In FIGS. 3 to 5, it is assumed that the sheave 21 is rotated counterclockwise in the drawing in accordance with the moving direction of the car 4 when an abnormality is detected.

When the energization of the electromagnetic actuator 46 is interrupted, as shown in FIG. 3, the locking arm 41 is rotated clockwise by the load of the tension spring 44, and the movable element 46a is displaced to the stop position. The stopper portion 41b is engaged with the teeth of the engagement disc 42.

Thereafter, the sheave 21 is further rotated counterclockwise as the car 4 moves. Therefore, as shown in FIG. 4, the spring wire 43 is curved along the outer peripheral surface of the guide portion 42 a, the claw 29 is rotated counterclockwise in the figure, and the tip of the claw 29 is the tooth of the main ratchet 30. Engage with. Further, the rotation restricting portion 42 b is separated from the spoke portion of the sheave 21.

When the claw 29 is engaged with the main ratchet 30, the rotation of the sheave 21 is transmitted to the main ratchet 30 via the claw 29, and the main ratchet 30 is rotated counterclockwise as shown in FIG. The rotation of the main ratchet 30 is transmitted to the arm 31 via the connection lever 34, the spring shaft 33, the spring receiving member 35, and the rope gripping spring 36, and the arm 31 is rotated counterclockwise in the figure.

Thereby, the shoe 32 is brought into contact with the governor rope 11, and the shoe 32 is pressed against the governor rope 11 by the rope gripping spring 36. Thus, when the shoe 32 is pressed against the governor rope 11, the circulating movement of the governor rope 11 is stopped, the lever 12 is operated by the movement of the car 4, and the emergency stop device 7 operates.

Further, when the main ratchet 30 is rotated in the counterclockwise direction in the figure, the position of the shaft 41a of the locking arm 41 is also moved in the counterclockwise direction in the figure. At this time, when the locking arm 41 is moved while the stopper portion 41b is engaged with the engagement disk 42, the link plate 45 is moved to the electromagnetic actuator 46 side by the pin 41c, and the mover 46a is moved to the link plate. It is pushed into the electromagnetic magnet 46b side through 45 to the vicinity of the normal position.

Next, the return operation after an emergency stop will be described. FIG. 6 is a front view showing a state during the return operation of the governor 9 of FIG. When safety is ensured after an emergency stop, the electromagnetic magnet 46b is first excited, and the mover 46a is attracted and held at the normal position.

At this time, the stopper portion 41b is pressed against the engagement disc 42 by the load of the tension spring 44, and the load of the tension spring 44 does not act on the movable element 46a. For this reason, the force required to draw the mover 46a and the link plate 45 toward the electromagnetic actuator main body is only a very small sliding loss load. Further, since the mover 46a is pushed into the electromagnetic actuator body at the time of an emergency stop, the distance for pulling the mover 46a may be short.

Thereafter, the emergency stop device 7 is returned by moving the car 4 in a direction opposite to the moving direction during emergency braking while holding the mover 46a with a slight suction force. At this time, the sheave 21 and the main ratchet 30 are rotated clockwise in FIG. At this time, the claw 29 is separated from the teeth of the main ratchet 30 by the restoring force of the spring wire 43.

Further, since the movable element 46a and the link plate 45 are held by an appropriate holding force of the electromagnetic magnet 46b, when the pin 41c comes into contact with the left end portion of the long hole 45a of the link plate 45, the stopper portion 41b is engaged. It begins to move away from the disk 42 and the load of the tension spring 44 begins to act on the pin 41c. When the car 4 is further moved in the return direction and the sheave 21 is rotated in the clockwise direction in FIG. 6, the speed governor 9 returns to the state in FIG.

When the rotation restricting portion 42b is brought into contact with the spoke portion of the sheave 21, the engagement disk 42 is forcibly rotated in the clockwise direction in the drawing in synchronization with the sheave 21, so that the engagement of the stopper portion 41b. The engagement with the combined disk 42 is more reliably released.

In such an elevator safety device, an engagement disk 42 that is rotatable relative to the sheave 21 and that is normally rotated integrally with the sheave 21 is provided coaxially with the sheave 21, and an electromagnetic actuator. When 46 stops the rotation of the engagement disk 42 via the engagement disk stop mechanism, the rotation of the sheave 21 is stopped in conjunction with the relative rotation of the sheave 21 with respect to the engagement disk 42, and the emergency stop device 7. Therefore, the emergency stop device 7 can be operated immediately by the electromagnetic actuator 46.

Further, the electromagnetic actuator 46 does not directly operate the rotating body stopping mechanism that stops the rotation of the sheave 21, but only operates the engaging disk stopping mechanism to stop the engaging disk 42. There is no need to perform the return operation only by the electromagnetic actuator 46, and there is no need to perform the return operation of the claw 29 directly by the electromagnetic actuator 46. Therefore, the electromagnetic actuator 46 can be reduced in size, and the electromagnetic actuator 46 can be disposed inside the base 23 to save space.

Further, the engaging disk stopping mechanism includes a locking arm 41 provided with a stopper portion 41b at an intermediate portion, a tension spring 44 connected to one end portion of the locking arm 41, and the other end portion of the locking arm 41. Since the link plate 45 connected to the electromagnetic actuator 46 is provided, the engagement disk 42 can be stopped with a simple configuration, and the electromagnetic actuator 46 can be downsized.

Furthermore, the locking arm 41 is mounted on the side surface of the main ratchet 30, and when the locking arm 41 is displaced by the rotation of the main ratchet 30, the movable element 46 a is returned to the normal position side via the link plate 45. Therefore, with a simple configuration, the retracting distance of the mover 46a by the electromagnetic magnet 46b can be shortened, and the electromagnetic actuator 46 can be downsized.

Further, since the interlocking mechanism includes the main ratchet 30, the claw 29, and the spring wire 43 provided between the engagement disk 42 and the claw 29, the rope with respect to the engagement disk 42 can be easily configured. The rotating body stopping mechanism can be operated in conjunction with the relative rotation of the vehicle 21.

Furthermore, since the guide portion 42a is provided on the engagement disk 42 and the spring wire 43 is used as the transmission member, the return operation of the claw 29 can be easily performed.

Furthermore, as shown in FIG. 7, even if the mover 46a is held on the electromagnetic actuator body side, when the speed of the car 4 reaches a preset overspeed, the claw 29 is rotated by the flyweight 25a. The tip of the claw 29 is engaged with the main ratchet 30. As a result, the main ratchet 30 is rotated counterclockwise in the figure, and the emergency stop device 7 operates as described above.

At this time, the spring wire 43 is only displaced away from the outer peripheral surface of the guide portion 42a as shown in FIG. For this reason, using the common claw 29, the electric operation mechanism and the mechanical operation mechanism can be provided at a relatively low cost.

Accordingly, when the car 4 reaches an overspeed even when the electromagnetic actuator 46 remains energized, or even if the mover 46a and the locking arm 41 do not move even if the electromagnetic actuator 46 is de-energized due to some trouble, The emergency stop device 7 can be operated as usual by the rotation of the flyweight 25a by centrifugal force.

Further, the lower activation device 14 provided in the tensioning vehicle device 10 is configured to operate the emergency stop device 7 when the car 4 moves upward, so that the emergency stop device 7 can be electrically connected in both the upper and lower directions. Can be activated.

Furthermore, the operation test of the emergency stop device 7 can be easily performed by cutting off the power supply to the electromagnetic actuator 46 not only at the time of abnormality detection but also at the time of inspection.

Embodiment 2. FIG.
Next, FIG. 8 is a front view showing a main part of a speed governor according to Embodiment 2 of the present invention, and the overall configuration of the elevator is the same as that of Embodiment 1. FIG. In the drawing, a rope groove into which the governor rope 11 is inserted is provided on the outer peripheral portion of the sheave 70 that is a rotating body. In Embodiment 2, the cross-sectional shape of the rope groove is V-shaped, whereby the frictional force with the governor rope 11 is increased.

For this reason, the sheave 70 required to activate the emergency stop device 7 if the rotation of the sheave 70 is stopped by increasing the mass of the tensioning wheel device 10 and appropriately securing the tension of the governor rope 11. The frictional force of the governor rope 11 can be ensured.

As a result, the components for gripping the governor rope 11 in the first embodiment (FIG. 2), that is, the arm 31, the shoe 32, the spring shaft 33, the connection lever 34, the spring receiving member 35, the rope gripping spring 36, and the like. It is omitted. Further, in order to stop the rotation of the sheave 70, the main ratchet 77 is fixed so as not to rotate with respect to the sheave shaft 22, which is a fixed shaft, unlike the first embodiment.

The sheave shaft 22 of the sheave 70 is provided with an engagement disk (small ratchet) 72 that can rotate relative to the sheave 70. A plurality of teeth are continuously provided on the outer periphery of the engagement disk 72 over the entire circumference. The engagement disk 72 is integrally provided with a cam plate 71 having a shape that expands the first and

second flyweights

74 a and 74 b by relative rotation with respect to the sheave 70.

The

flyweights

74a and 74b are provided with

rotatable rollers

75a and 75b, respectively. A torsion spring 73 is attached to the engagement disk 72 so that the cam plate 71 is always in contact with the

rollers

75a and 75b.

The base 23 (FIG. 2) is provided with a locking arm 76 that is rotatable about a shaft 76a. The locking arm 76 is provided with a stopper portion 76 b that engages with the teeth of the engaging disk 72. The stopper portion 76 b protrudes in parallel with the axial direction of the engagement disc 72. Further, a tension spring 44 (FIG. 2) is provided between the upper end portion of the locking arm 76 and the base 23. The tension spring 44 urges the locking arm 76 in a direction in which the stopper portion 76b engages with the teeth of the engagement disc 72 (clockwise in FIG. 8).

A pin 76 c is provided at the lower end of the locking arm 76. The link plate 45 is rotatably connected to the pin 76c. An electromagnetic actuator 46 is fixed to the base 23. The electromagnetic actuator 46 has a mover 46 a connected to the link plate 45. Further, the electromagnetic actuator 46 rotates the locking arm 41 against the pulling spring 44 in a direction (counterclockwise in FIG. 8) in which the stopper portion 41b is separated from the teeth of the engagement disc 42.

In Embodiment 2, the rotating body stopping mechanism that stops the rotation of the sheave 70 includes a main ratchet 77 and a claw 29. The interlocking mechanism has a cam plate 71, fly

weights

74a and 74b, and

rollers

75a and 75b.

When the rotation of the engagement disk 72 is stopped by the engagement disk stop mechanism, the rotation of the cam plate 71 is also stopped, and the roller 75a, along the cam plate 71 is rotated by the relative rotation of the sheave 70 with respect to the engagement disk 72. 75b is displaced radially outward of the sheave 70. As a result, the

flyweights

74 a and 74 b are rotated, and the rotating body stopping mechanism is operated, that is, the claw 29 is engaged with the main ratchet 77. Other configurations are the same as those in the first embodiment.

When the energization of the electromagnetic actuator 46 is interrupted, the locking arm 76 is rotated in the clockwise direction in FIG. 8 by the load of the pulling spring 44, and the stopper portion 76 b is engaged with the teeth of the engagement disk 72.

After this, the sheave 70 continues to be further rotated counterclockwise in FIG. 8 by the movement of the car 4. At this time, since the

rollers

75a and 75b of the

flyweights

74a and 74b are in contact with the cam plate 73, the

flyweights

74a and 74b are rotated counterclockwise in FIG. 8 about the

pins

24a and 24b. Can be expanded.

When the flyweight 74 a is expanded, the claw 29 is rotated counterclockwise in FIG. 8 and the tip of the claw 29 is engaged with the teeth of the main ratchet 77. Thereby, rotation of the sheave 70 is stopped, the governor rope 11 is frictionally held by the frictional force between the governor rope 11 and the rope groove of the sheave 70, and the emergency stop device 7 operates.

Even with such an elevator safety device, the emergency stop device 7 can be immediately operated by the electromagnetic actuator 46 and the electromagnetic actuator 46 can be downsized. In addition, using the common claw 29, the electric operation mechanism and the mechanical operation mechanism can be provided at a relatively low cost.

Embodiment 3 FIG.
Next, FIG. 9 is a front view showing a main part of a speed governor according to Embodiment 3 of the present invention. In the figure, a trip lever 62 is attached to the side surface of the sheave 21 so as to be rotatable about a shaft 61 parallel to the pin 24a. The trip lever 62 has a protrusion 62 a that engages with the claw 29.

Further, a part of the trip lever 62 is in contact with the first flyweight 25a (FIG. 2), and is rotated about the shaft 61 by the rotation of the flyweight 25a. The shaft 61 is provided with a torsion spring 63 that urges the trip lever 62 in a direction in which the trip lever 62 is brought into contact with the flyweight 25a (clockwise in FIG. 9).

A tension spring 64 is provided between the claw 29 and the sheave 21 to urge the claw 29 in a direction to engage with the main ratchet 30. The claw 29 is normally engaged with the protrusion 62 a of the trip lever 62 and separated from the main ratchet 30. However, when the engagement with the trip lever 62 is released, the claw 29 is rotated by the spring force of the tension spring 64, and the main ratchet 30. Engage with.

The sheave shaft 22 is provided with an engagement disk 65 that can rotate relative to the sheave 21. The engagement disk 65 is rotated integrally with the sheave 21 at the normal time. A plurality of teeth are continuously provided on the outer periphery of the engagement disk 65 over the entire circumference. In addition, a cylindrical guide portion 65 a surrounding the sheave shaft 22 is provided on one side surface of the engagement disc 65.

1st and 2nd

rotation control part

65b, 65c is provided in the guide part 65a. The first rotation restricting portion 65 b restricts the engagement disk 65 from rotating relative to the sheave 21 in the counterclockwise direction of FIG. 9 by contacting the spoke portion of the sheave 21. Further, the second rotation restricting portion 65c abuts against a spoke portion different from the spoke portion with which the first rotation restricting portion 65b abuts, so that the engagement disk 65 is clockwise with respect to the sheave 21 in FIG. The relative rotation is restricted.

Therefore, the engagement disc 65 can be rotated relative to the sheave 21 only within a predetermined angle range (acute angle range). In normal times, the first rotation restricting portion 65b is in contact with the spoke portion, and the second rotation restricting portion 65c is separated from the corresponding spoke portion.

A trigger plate 66 as a transmission member composed of a thin leaf spring is assembled between the protrusion 62a of the trip lever 62 and the guide portion 65a. The base end portion of the trigger plate 66 is fixed to the guide portion 65a. Further, a rectangular opening 66a is provided at the tip of the trigger plate 66 as shown in FIG. And the protrusion part 62a of the trip lever 62 is inserted in the opening part 66a.

A locking arm 51 is provided on the side surface of the main ratchet 30 so as to be rotatable about a shaft 51a. The shaft 51 a is provided in the middle portion in the longitudinal direction of the locking arm 51. A stopper 51 b that engages with the teeth of the engagement disk 65 is provided at the longitudinal intermediate portion of the locking arm 51. The stopper portion 51 b protrudes in parallel with the sheave shaft 22 from one side surface of the locking arm 51.

A tension spring 54 is attached between one end (left end) of the locking arm 51 and the main ratchet 30 to urge the stopper 51 b in a direction to engage with the engagement disk 65. The base 23 (FIG. 2) is provided with a guide plate 55 that rotates about a rotation shaft 55a. The guide plate 55 is provided with a long hole 55b.

The engaging projection 51c of the locking arm 51 is inserted into the elongated hole 55b. The engaging protrusion 51 c protrudes in parallel with the sheave shaft 22 from the other side surface of the locking arm 51. Further, the engagement protrusion 51 c is provided at the same position as the stopper portion 51 b in the longitudinal direction of the locking arm 51. Further, the stopper portion 51 b and the engagement protrusion 51 c are provided between the shaft 51 a and the other end portion of the locking arm 51.

An electromagnetic actuator 56 is assembled to the base 23. The electromagnetic actuator 56 includes a mover 56a that is in contact with the upper surface of the locking arm 51, and an electromagnetic magnet 56b that attracts the mover 56a.

The mover 56a is located between a normal position (FIG. 9) that protrudes greatly downward from the electromagnetic magnet 56b and a stop position (FIG. 3) that is displaced upward from the normal position and engages the stopper disc 51b with the engagement disk 65. It can be displaced by. Moreover, the surface (lower end surface) which contacts the latching arm 51 of the needle | mover 56a is hemispherical.

When the movable element 56a is in the normal position, it abuts against the other end portion of the locking arm 51, and holds the stopper portion 51b away from the engaging disk 65 against the pulling spring 54.

In the third embodiment, the engaging disk stop mechanism includes a locking arm 51 and a tension spring 54. The interlocking mechanism includes a trigger plate 66, a trip lever 62, a claw 29, a tension spring 64, and the main ratchet 30.

When the rotation of the engagement disk 65 is stopped by the engagement disk stop mechanism, the rotation of the trigger plate 66 is also stopped, and the engagement of the trip lever 62 with the claw 29 is released by the rotation of the sheave 70 with respect to the trigger plate 66. The Thereby, the nail | claw 29 engages with the main ratchet 30, the main ratchet 30 rotates with the sheave 21, and a rotary body stop mechanism is operated.

The stop operation transmission mechanism includes the engagement disk stop mechanism, the interlocking mechanism, and the engagement disk 65 described above. From when the movable element 56a is displaced to the stop position, the sheave 21 is stopped. As the sheave 21 rotates, the mover 56a is returned to the normal position. At this time, the stop operation transmission mechanism returns the movable element 56a to the normal position side by utilizing the weight of the movable element 56a. Other configurations are the same as those in the first embodiment.

Next, the operation will be described. The electromagnetic actuator 56 is always energized during normal traveling and stopping of the car 4. On the other hand, the brake 4 of the drive device 2 occurs or the traction force between the main rope 3 and the drive sheave 2a is lost for some reason, and the car 4 is intended by the unbalanced load. If the main rope 3 is moved, or if the disconnection of the main rope 3 is detected, a stop command signal is issued from the control system and the energization to the electromagnetic actuator 56 is cut off.

When the energization of the electromagnetic actuator 56 is interrupted, as shown in FIG. 11, the locking arm 51 is rotated counterclockwise by the pulling spring 54 and the mover 56a is displaced to the stop position. . Thereby, the stopper part 51b engages with the engaging disk 65, and the rotation of the engaging disk 65 is stopped.

When the rotation of the engagement disk 65 is stopped, the sheave 21 continues to rotate counterclockwise in FIG. 11, the projection 62 a of the trip lever 62 is caught by the opening 66 a of the trigger plate 66, and the spring of the trigger plate 66 is moved. The force overcomes the spring force of the torsion spring 63, and the trip lever 62 is rotated counterclockwise in FIG.

Thereby, the engagement between the projection 62a and the claw 29 is released, and the claw 29 is engaged with the main ratchet 30 by the load of the tension spring 64. Then, as shown in FIG. 12, the main ratchet 30 is rotated, the lever 31 is tilted, the shoe 32 is pressed against the governor rope 11, the circulation of the governor rope 11 is stopped, and the emergency stop device 7 is Operate.

Further, when the main ratchet 30 is rotated, the locking arm 51 is rotated together with the main ratchet 30. At this time, the guide plate 55 is rotated clockwise with respect to the base 23 about the shaft 55a. For this reason, the stopper portion 51 b is restrained by the elongated hole 55 b of the guide plate 55 and is separated from the teeth of the engagement disc 65. In this state, the spring of the tension spring 54 acts on the edge of the elongated hole 55b. The contact point where the axis (vertical direction) of the mover 56a intersects with the locking arm 51 moves downward, and the mover 56a moves near the normal position due to its own weight.

That is, after the energization of the electromagnetic actuator 56 is interrupted, the mover 56a is temporarily moved upward by the load of the tension spring 54, but the main ratchet 30 is rotated to a position where the circulation of the governor rope 11 is stopped. Then, since the locking arm 51 is retracted below the normal position, the movable element 56a moves downward due to its own weight.

Thus, when the main ratchet 30 is rotated, the stopper portion 51b of the locking arm 51 is separated from the teeth of the engagement disc 65, and the movable element 56a is restored by its own weight, so that the electromagnetic magnet 56b moves the movable element 56a. There is no need to suck a long distance.

In the return operation after the emergency stop device 7 is operated, if the electromagnetic actuator 56 is energized and the mover 56a is held at the normal position, the claw 29 is re-engaged with the trip lever 62 side. Good (see, for example, JP-A-2002-370879).

Even with such an elevator safety device, the emergency stop device 7 can be immediately operated by the electromagnetic actuator 56 and the electromagnetic actuator 56 can be downsized. In addition, using the common claw 29, the electric operation mechanism and the mechanical operation mechanism can be provided at a relatively low cost.

Embodiment 4 FIG.
Next, FIG. 13 is a front view showing a main part of an elevator safety device according to Embodiment 4 of the present invention. In the fourth embodiment, a conventional mechanical speed governor 9 that operates the emergency stop device 7 only when the car 4 is traveling downward is provided above the hoistway 1. Then, the electric first starter 81a that operates the emergency stop device 7 when the car 4 is traveling upward, and the emergency stop device 7 is operated when the car 4 is traveling downward. The tensioning device 10 is provided with an electric second activation device 81b to be operated.

A mounting plate 82 is fixed to the back of the car guide rail 6. The mounting plate 82 is provided with a horizontal shaft 83 that supports the tensioning apparatus 10. A base end portion of an attachment arm 84 is rotatably attached to the shaft 83. A plurality of teeth 84 a are partially provided on the outer peripheral portion of the base end portion of the mounting arm 84.

The mounting plate 82 is provided with a stopper 86 that can be engaged with the teeth 84a. The stopper 86 is rotatably attached to a stopper shaft 85 that is parallel to the shaft 83. The shapes and positions of the teeth 84a and the stopper 86 are set so as to allow the rotation of the mounting arm 84 in the clockwise direction in FIG. 13 and restrict the rotation in the counterclockwise direction.

Thereby, when elongation occurs in the governor rope 11, the tensioner device 10 can keep the tension of the governor rope 11 by moving the tensioner device 10 downward. It is prevented from moving to.

Next, the configuration of the tensioning vehicle device 10 will be described. A base 80 is attached to the lower part of the attachment arm 84. A sheave 87 that is a second rotating body around which the governor rope 11 is wound is attached to the base 80. The upper end of the governor rope 11 is wound around a sheave 21 (FIG. 2) of the governor 9 that is the first rotating body. The

sheaves

87 and 21 are rotated as the car 4 moves up and down. Further, a weight 80 a for applying sufficient tension to the governor rope 11 is assembled to the lower portion of the base 80.

The first activation device 81a is mainly arranged on one side surface of the sheave 87, and the second activation device 81b is mainly arranged on the other side surface of the sheave 87. The first activation device 81a stops the rotation of the sheave 87 in the counterclockwise direction of FIG. The second activation device 81b stops the rotation of the sheave 87 in the clockwise direction in FIG. Since the configuration of the first and

second activation devices

81a and 81b is the same as the configuration of the upper activation device 13 of the first embodiment, a specific description is omitted.

However, since the speed governor 9 that operates mechanically is provided separately, the sheave 87 has no flyweight. Further, the sheave 87 is provided with an abutting portion with which the

stopper portions

88a and 88b of the

claws

89a and 89b abut at the normal time.

Next, the operation will be described. First, when the car 4 is moving downward, the sheave 87 is rotated counterclockwise in FIG. Here, when a stop command signal is issued from the control system, energization to the electromagnetic actuators (first and second actuators) 106a and 106b is simultaneously cut off. As a result, the stopper portions of the locking

arms

101a and 101b come into contact with the engaging

disks

102a and 102b.

Since the engaging

disks

102a and 102b are rotated counterclockwise in FIG. 13, the locking arm 101a engages with the teeth of the engaging disk 102a and stops rotating. The operation of climbing the gentle slope of the tooth and falling to the valley in contact with the outer periphery of 102b is not engaged with the tooth. For this reason, only the claw 89 a is engaged with the main ratchet 90 a, and the shoe 92 a is pressed against the governor rope 11 on the sheave 87.

If the car 4 continues to move downward in this state, the governor rope 11 tries to rotate the mounting arm 84 counterclockwise in FIG. The cage 4 is tilted upward relative to the car 4 and the emergency stop device 7 operates.

Next, the return operation after operating the emergency stop device 7 will be described. First, energization of the

electromagnetic actuators

106a and 106b is started. At this time, the mover of the electromagnetic actuator 106a is returned to the normal position side by the rotation of the main ratchet 90a, so that it is held at the normal position by energization. On the other hand, the mover of the electromagnetic actuator 106b remains moved to the stop position.

Thereafter, when the car 4 is moved upward to release the engagement of the emergency stop device 7 to the car guide rail 6 and the sheave 87 is rotated clockwise in FIG. 13, the locking arm 101a is moved to the normal position. Returned to At substantially the same time, the locking arm 101b restrains the rotation of the engagement disk 102b, so that the claw 89b engages with the teeth of the main ratchet 90b, and the main ratchet 90b is rotated clockwise in FIG. Thereby, the mover of the electromagnetic actuator 106b is returned to the normal position side and is held at the normal position by the attractive force of the electromagnetic actuator 106b.

Thereafter, the cage 4 is once again moved downward in the reverse direction, whereby the locking arm 101b is returned to the normal position, and the return operation of the emergency stop device 7 and the start-up

devices

81a and 81b is completed.

On the other hand, when the car 4 is moving upward, the sheave 87 is rotated clockwise in FIG. Here, when a stop example is issued from the control system, energization to the

electromagnetic actuators

106a and 106b is simultaneously cut off. As a result, the stopper portions of the locking

arms

101a and 101b come into contact with the engaging

disks

102a and 102b.

Since the engaging

discs

102a and 102b are rotated in the clockwise direction in FIG. 13, contrary to the above, the locking arm 101b engages with the teeth of the engaging disc 102b to stop the rotation. 101a does not engage with the engaging disk 102a. For this reason, only the claw 89b is engaged with the main ratchet 90b, and the shoe 92b is pressed against the governor rope 11 on the sheave 87.

In this state, when the car 4 continues to move upward, the governor rope 11 tries to rotate the mounting arm 84 counterclockwise in FIG. The cage 4 is tilted downward relative to the car 4 and the emergency stop device 7 operates. The return operation is the same as described above.

Even with such an elevator safety device, the emergency stop device 7 can be immediately operated by the

electromagnetic actuators

106a and 106b, and the

electromagnetic actuators

106a and 106b can be downsized. In addition, since the

starter devices

81a and 81b are provided in the tensioning vehicle device 10, the electric operation mechanism and the mechanical operation mechanism can be easily installed.

In addition, since the first and

second activation devices

81a and 81b that operate the emergency stop device 7 in both directions are arranged at one place on the tensioning device 10 side, wiring and control for the

electromagnetic actuators

106a and 106b are performed. Devices can also be consolidated in one place, and the device configuration can be simplified.

Although not shown in the fourth embodiment, means for detecting that the movers of the

electromagnetic actuators

106a and 106b are held at the normal positions may be used. In this case, by stopping the movement of the car 4 at the same time as detecting the holding of the mover, the efficiency of the return operation can be improved, the damage to the car guide rail 6 can be suppressed, and the car guide rail 6 is repaired. This saves the extra effort.

In the fourth embodiment, the speed governor 9 is arranged at the upper part of the hoistway 1 and the first and

second activation devices

81a and 81b are arranged at the lower part of the hoistway 1. Good.

Furthermore, although the electromagnetic actuator is shown as the actuator in the first to fourth embodiments, the actuator is not limited to this.

Claims

A speed governor that is provided at any one of an upper part and a lower part of the hoistway and has a first rotating body that rotates as the car is raised and lowered, and mechanically detects an overspeed of the car;
A second rotating body provided on the other of the upper and lower portions of the hoistway and rotated in accordance with the raising and lowering of the car;
Emergency stop means for emergency stopping the car by stopping the rotation of at least one of the first and second rotating bodies;
A first actuator provided on the second rotating body and operating in response to a stop command signal from a control system, and rotating the second rotating body in a direction corresponding to the lowering of the car. A first starter for stopping, and a second actuator provided on the second rotating body and operating in response to a stop command signal from the control system, in a direction corresponding to the rise of the car An elevator safety device comprising: a second activation device that stops the rotation of the second rotating body.
The speed governor is disposed above the hoistway, and the second rotating body is disposed below the hoistway,
A governor rope wound around the first rotating body is wound around the second rotating body,
The elevator safety device according to claim 1, wherein the second rotating body is allowed to be displaced downward and is restricted from being displaced upward.
And further comprising a base for supporting the second rotating body, the first starting device and the second starting device, and a pivotable mounting arm for supporting the base.
The elevator according to claim 2, wherein the mounting arm is allowed to rotate in a direction in which the base is displaced downward, and the rotation of the mounting arm in a direction in which the base is displaced upward is restricted. Safety device.