KR20110059804A - Safety device for elevator - Google Patents

Abstract

The safety device for an elevator includes a rotating body that is rotated with the elevating of a car, a rotating body stopping mechanism for mechanically stopping the rotation of the rotating body, and between a normal position and a stopping position for operating the rotating body stopping mechanism. An actuator having a displaceable mover, an actuator having an electromagnetic magnet that keeps the mover in the normal position by energizing, and the energization of the electromagnetic magnet is interrupted, thereby displacing the mover from the normal position to the stop position and stopping the rotating body. A stop motion transmission mechanism which stops the said rotating body by operating a mechanism is provided. The stop motion transmission mechanism returns the mover to the normal position side with the rotation of the rotor until the rotor is stopped after displacing the mover to the stop position.

Description

Safety device for elevator {SAFETY DEVICE FOR ELEVATOR}

The present invention relates to a safety device for an elevator to operate the emergency stop means by the drive of the actuator.

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

In another conventional elevator emergency stop system, a latch is rotatably mounted on a movable base that is horizontally displaceable with respect to the frame body. The latch is rotated by an electronic actuator and engages a ratchet that is rotated integrally with the governor sheave. When the latch engages with the ratchet, the movable base is displaced by the rotation of the ratchet, the pressing shoe is displaced to the restraint position in association with the movable base, and the governor rope is restrained (for example, refer to Patent Document 1 and Fig. 14).

[Patent Document 1] WO2005 / 102899

In the conventional emergency stop system as described above, in the method of displacing the pressing shoe by the electromagnetic actuator, since the amount of movement for returning the pressing shoe from the restraining position to the open position is large, the electromagnetic actuator is enlarged.

In addition, since the latch is directly rotated by the electromagnetic actuator in the method of rotating the latch by the electromagnetic actuator to engage the ratchet, it is necessary to return the latch to the release position only by the electromagnetic actuator during the return operation, thereby increasing the size of the electromagnetic actuator. . In addition, since the latch is subjected to the rotational force of the governor sheave and ratchet, it is necessary to engage the ratchet deeply and reliably, thereby increasing the distance for returning the latch from the engaged position to the released position, thereby increasing the size of the electromagnetic actuator.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to obtain an elevator safety device capable of operating the emergency stop means immediately by an actuator and miniaturizing the actuator.

The safety device for an elevator according to the present invention includes a rotating body that rotates with the lifting and lowering of a car, a rotating body stopping mechanism that mechanically stops the rotation of the rotating body, and an emergency stopping the car by stopping the rotation of the rotating body. An actuator having a movable element that is displaceable between the stop means, the normal position, and the stop position for operating the rotating body stop mechanism, an actuator having an electromagnetic magnet that keeps the movable body in the normal position by being energized, and the energization to the electromagnetic magnet is cut off. And a stop motion transmission mechanism for displacing the mover from the normal position to the stop position, and for stopping the rotating body by operating the rotating body stop mechanism. The mover is returned to the normal position side with the rotation of the rotating body until

According to the present invention, the emergency stop means can be immediately operated by the actuator, and an elevator safety device capable of miniaturizing the actuator can be obtained.

BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram which shows the elevator by Embodiment 1 of this invention.
FIG. 2 is a front view illustrating the governor of FIG. 1. FIG.
3 is a front view illustrating the operation of the upper starting device when the energization to the electromagnetic actuator of FIG. 2 is interrupted.
4 is a front view illustrating a state of the rear end of FIG. 3.
5 is a front view illustrating a state of the rear end of FIG. 4.
6 is a front view illustrating a state during the return operation of the governor of FIG. 2.
FIG. 7 is a front view illustrating a state in which the flyweight of the governor of FIG. 2 is opened.
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.
FIG. 10 is a configuration diagram illustrating an engagement state between the trip lever and the trigger plate of FIG. 9.
FIG. 11 is a front view illustrating the operation of the upper starting device when the energization to the electromagnetic actuator of FIG. 9 is interrupted. FIG.
12 is a front view illustrating a state of the rear end of FIG. 11.
It is a front view which shows the principal part of the elevator safety device which concerns on Embodiment 4 of this invention.

EMBODIMENT OF THE INVENTION Hereinafter, preferred embodiment of this invention is described with reference to drawings.

Embodiment 1

BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram which shows the elevator by Embodiment 1 of this invention. In the drawing, a drive device 2 is provided at an upper portion of the hoistway 1. The main rope 3 as a suspension means is wound around the drive sheave 2a of the drive device 2. A car 4 is suspended at 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 for guiding the lifting and lowering of the car 4 and a pair of weight guide rails (not shown) for guiding the lifting and lowering of the counterweight 5 are provided. have.

In the lower part of the car 4, an emergency stop device 7 is provided as an emergency stop means for engaging the car guide rail 6 to emergency stop the car 4. The governor support member 8 is fixed near 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 4 and operating the emergency stop device 7 is supported.

A tension sheave device 10 is provided near the pit of the hoistway 1. The upper end and the lower end of the governor rope 11 are wound around the governor 9 and the tension sheave device 10, respectively. The governor rope 11 is connected to the emergency stop device 7 via the lever 12, and is circulated with the lifting and lowering of the car 4.

The governor 9 is provided with an upper starting device 13 for operating the emergency stopping device 7 in accordance with the stop command signal. The tension sheave device 10 is provided with a lower starting device 14 for operating the emergency stop device 7 in accordance with the stop command signal.

FIG. 2 is a front view illustrating the governor 9 of FIG. 1. In the drawing, the sheave 21 as a rotating body in which the governor rope 11 is wound is supported by the base 23 so as to be rotatable about the sheave shaft 22. The sheave 21 is rotated with the lifting and lowering of the car 4. The sheave 21 is rotated at a speed corresponding to the traveling speed of the car 4 in the direction corresponding to the traveling direction of the car 4.

The side of the sheave 21 is provided with a first flyweight 25a rotatable about the pin 24a and a second flyweight 25b rotatable around the pin 24b. These flyweights 25a and 25b are connected to each other by a link 26.

An operating piece 37 is fixed to one end of the first flyweight 25a. The first and second flyweights 25a and 25b are rotated by the centrifugal force by the rotation of the sheave 21. As a result, the operation piece 37 is displaced to the radially outer side of the sheave 21. Between the other end of the 1st flyweight 25a and the sheave 21, the balance spring 27 which opposes a centrifugal force is provided.

The base 23 is equipped with a car stop switch 28 for operating a brake device (not shown) of the drive device 2. The car stop switch 28 has a switch lever 28a operated by the operating piece 37.

The sheave shaft 22 is provided with an engagement disk (small ratchet) 42 which is rotatable relative to the sheave 21. The engagement disk 42 is smaller in diameter than the sheave 21. In addition, the interlocking disk 42 is normally rotated integrally with the sheave 21. In the outer peripheral portion of the engaging disk 42, a plurality of teeth are provided continuously over the entire circumference. Moreover, the cylindrical guide part 42a which rests the sheave shaft 22 is provided in one side surface of the engagement disk 42. As shown in FIG.

The rotation restricting part 42b is provided in the guide part 42a. The rotation restriction part 42b protrudes tangentially from the outer peripheral part of the guide part 42a. In addition, the distal end portion of the rotation restricting portion 42b is bent at a right angle and normally abuts against the spoke portion of the sheave 21. Thereby, the rotation of the engaging disk 42 relative to the sheave 21 in the counterclockwise direction (Fig. 2) is restricted, and only the relative rotation in the clockwise direction (Fig. 2) is allowed.

The side of the sheave 21 is provided with a claw 29 which can be rotated around the pin 24a. The base end portion of the 'L' shaped spring wire 43 as the transmission member is wound about 90 degrees on the guide portion 42a. The tip end of the spring wire 43 is connected to one end of the claw 29.

The other end part of the claw 29 is provided with the contact piece 29a which abuts on the 1st flyweight 25a. As a result, 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 which is rotatable about the sheave shaft 22. The main ratchet 30 is larger in diameter than the engagement disk 42. In the outer peripheral portion of the main ratchet 30, a plurality of teeth are provided continuously over the entire circumference. If the first flyweight 25a is rotated by a predetermined 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 the locking arm 41 which can be rotated about the shaft 41a. The shaft 41a is provided in the middle part of the longitudinal direction of the locking arm 41. As shown in FIG. In the middle of the locking arm 41, that is, in the vicinity of the shaft 41a, a stopper portion 41b that engages with the teeth of the engaging disk 42 is provided. A tension spring 44 is provided between the base 23 and one end (upper end) of the locking arm 41. The tension spring 44 presses the locking arm 41 in the direction in which the stopper portion 41b is engaged with the teeth of the engaging disk 42 (clockwise in FIG. 2).

A pin 41c is provided at 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 connection portion of the tension spring 44.

The link plate 45 is provided with an elongated hole 45a into which the pin 41c is inserted. The electromagnetic actuator 46 is fixed to the base 23. The electromagnetic actuator 46 has a movable element 46a connected to the link plate 45 and an electromagnetic magnet 46b that sucks the movable element 46a.

The mover 46a is a normal position (FIG. 2) pulled to the electromagnetic magnet 46b side, and the stop position which protrudes from the electromagnetic magnet 46b and engages the stopper part 41b with the engagement disk 42 (FIG. 3). It can be displaced horizontally between and.

In addition, in the electromagnetic actuator 46, the link plate 45 is approaching up to about 5 mm or less from the electromagnetic magnet (actuator main body) 46b, and the load of the tension spring 44 is acting on the movable member 46a. In the non-state, it has the ability to suck only the sliding loss load of a very small part of the movable element 46a. In addition, the electromagnetic actuator 46 moves so as to overcome the load of the tension spring 44 while the movable member 46a is in close contact with the electromagnetic magnet 46b, so that the locking arm 41 does not rotate clockwise in the figure. It has a holding force for holding the ruler 46a.

The upper starting device 13 has 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 starting device 14 is the same as that of the upper starting device 13.

The arm 31 rotatably attached to the base 23 is rotatably attached to the shoe 32 which is pushed against the governor rope 11. A spring shaft 33 penetrates through the spring receiving portion 31a of the arm 31. The connecting lever 34 is connected between the 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 pushing the shoe 32 with the governor rope 11 is provided between the spring receiving portion 31a and the spring receiving member 35.

In Embodiment 1, the rotating body stop mechanism for mechanically stopping the rotation of the sheave 21 includes an arm 31, a shoe 32, a spring shaft 33, a connecting lever 34, a spring receiving member 35 and a rope. It has a gripping spring 36.

The engaging disk stop mechanism for mechanically stopping the rotation of the engaging disk 42 has a locking arm 41, a tension spring 44 and a link plate 45. In addition, the electromagnetic actuator 46 operates the engaging disk stop mechanism to stop the rotation of the engaging disk 42.

In addition, the interlock mechanism has a main ratchet 30, a claw 29, and a spring wire 43. Further, the interlock mechanism operates the rotor stop mechanism in conjunction with the relative rotation of the sheave 21 with respect to the interlocking disk 42 when the rotation of the interlocking disk 42 is stopped by the interlocking disk stop mechanism. Stop).

Specifically, the main ratchet 30 is rotated to operate the rotating body stop mechanism. The claw 29 is engaged with the main ratchet 30 by rotating the sheave 21 relative to the engagement disk 42 to rotate the main ratchet 30 together with the sheave 21. The spring wire 43 rotates the claw 29 in the direction in which the sheave 21 is relatively rotated with respect to the engagement disk 42 to be engaged with the main ratchet 30.

In addition, the stop motion transmission mechanism includes the above-mentioned engagement disk stop mechanism, the interlock mechanism, and the engagement disk 42, and the sheaves from the movable element 46a to the stop position until the sheave 21 is stopped ( With the rotation of 21), the mover 46a is returned to the normal position side.

Next, the operation will be described. The electronic actuator 46 is always in an energized state during normal driving and stopping of the car 4. On the other hand, when the brake failure 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, the car 4 is unbalanced by the unbalanced load. When it is moved unintentionally and when 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.

3-5 is a front view which shows operation | movement of the upper starting device 13 when the electricity supply to the electromagnetic actuator 46 of FIG. 2 is interrupted | blocked. 3 to 5, the sheave 21 is rotated counterclockwise in the figure corresponding to the moving direction of the car 4 when the abnormality is detected.

When the energization to the electromagnetic actuator 46 is cut off, as shown in FIG. 3, the locking arm 41 is rotated clockwise in the figure by the load of the tension spring 44, and the mover 46a is moved to a stop position. In addition to being displaced, the stopper portion 41b is engaged with the teeth of the engagement disk 42.

After that, the sheave 21 continues to rotate in the counterclockwise direction of the drawing by the movement of the car 4. For this reason, as shown in FIG. 4, the spring wire 43 is bent along the outer peripheral surface of the guide part 42a, the claw 29 is rotated counterclockwise in the figure, and the front end of the claw 29 is main. Meshes with the teeth of the ratchet (30). In addition, the rotation restricting portion 42b 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 as shown in FIG. 5, the main ratchet 30 is shown in FIG. 5. Rotate counterclockwise. Rotation of the main ratchet 30 is transmitted to the arm 31 through the connecting lever 34, the spring shaft 33, the spring receiving member 35 and the rope gripping spring 36, the arm 31 is shown in the figure Rotates counterclockwise.

As a result, the shoe 32 is brought into contact with the governor rope 11, and the shoe 32 is further pushed against the governor rope 11 by the rope gripping spring 36. In this way, when the shoe 32 is pushed onto the governor rope 11, the circulation movement of the governor rope 11 is stopped, and the lever 12 is operated by the movement of the car 4, and the emergency stop device is operated. (7) is operated.

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

Next, the return operation after the 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 the emergency stop, first, the electromagnetic magnet 46b is excited, and the movable member 46a is attracted and held in the normal position.

At this time, the stopper part 41b is pushed to the engagement disk 42 by the load of the tension spring 44, and the load of the tension spring 44 does not act on the mover 46a. For this reason, the force required to pull the movable element 46a and the link plate 45 toward the electromagnetic actuator main body side is only a slight sliding loss load. In addition, since the movable member 46a is pushed into the electromagnetic actuator main body at the time of emergency stop, the distance which pulls the movable member 46a becomes short.

Thereafter, the emergency stop device 7 is returned by moving the car 4 in the direction opposite to the moving direction at the time of emergency braking while maintaining the movable member 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.

In addition, since the movable member 46a and the link plate 45 are held by the appropriate holding force of the electromagnetic magnet 46b, when the pin 41c contacts the left end of the long hole 45a of the link plate 45, The stopper portion 41b starts to fall off the engagement disk 42, so that the load of the tension spring 44 begins to act on the pin 41c. Then, when the car 4 is further moved in the return direction and the sheave 21 is rotated clockwise in FIG. 6, the governor 9 returns to the state shown in FIG. 2.

In addition, when the rotation restricting portion 42b comes into contact with the spoke portion of the sheave 21, the engaging disk 42 is forcibly rotated clockwise in the drawing in synchronization with the sheave 21, so that the stopper portion 41b is provided. Of the engagement disk 42 is more surely released.

In such a safety device for an elevator, the engaging disk 42 which is relatively rotatable with respect to the sheave 21 and is normally rotated integrally with the sheave 21 is provided coaxially with the sheave 21, and the electromagnetic actuator ( 46 stops the rotation of the engagement disk 42 through the engagement disk stop mechanism, the rotation of the sheave 21 is stopped in response to the relative rotation of the sheave 21 with respect to the engagement disk 42 and the emergency stop device ( Since 7) is braking operation, the emergency stop device 7 can be operated immediately by the electromagnetic actuator 46.

Moreover, since the electromagnetic actuator 46 does not directly operate the rotating body stop mechanism which stops the rotation of the sheave 21, but only operates the engaging disk stop mechanism and stops the engaging disk 42, the mover 46a ) Does not need to be returned by the solenoid actuator 46 alone, and the return operation of the claw 29 does not need to be directly performed by the solenoid actuator 46. Therefore, the electronic actuator 46 can be miniaturized, and the electronic actuator 46 can be arrange | positioned inside the base 23, and space can be saved.

In addition, the engaging disk stop mechanism includes a locking arm 41 provided with a stopper portion 41b in the middle portion, a tension spring 44 connected to one end of the locking arm 41, and the other end of the locking arm 41. Since it has the link plate 45 connected between and the electronic actuator 46, the engagement disk 42 can be stopped by a simple structure, and the electronic actuator 46 can be miniaturized.

Moreover, when the locking arm 41 is mounted on the side of the main ratchet 30 and the locking arm 41 is displaced by the rotation of the main ratchet 30, the movable plate 46a is moved through the link plate 45. Since is returned to the normal position side, the return distance of the movable element 46a by the electromagnetic magnet 46b can be shortened by a simple structure, and the electromagnetic actuator 46 can be miniaturized.

Moreover, since the interlock mechanism has the main ratchet 30, the claw 29, and the spring wire 43 provided between the engagement disk 42 and the claw 29, the engagement disk 42 is simple by a simple structure. The rotating body stop mechanism can be operated in conjunction with the relative rotation of the sheave 21 with respect to).

In addition, by providing the guide portion 42a in the engagement disk 42 and using the spring wire 43 as the transmission member, the return operation of the claw 29 can also be easily performed.

Moreover, as shown in FIG. 7, even when the movable part 46a is hold | maintained by the electromagnetic actuator main body side, when the speed | rate of the cage | basket | car 4 reaches the preset overspeed, it will be closed by the flyweight 25a. 29 is rotated so that the tip of the claw 29 meshes with the main ratchet 30. As a result, the main ratchet 30 is rotated in the counterclockwise direction in the drawing, and the emergency stop device 7 operates as described above.

At this time, as shown in FIG. 7, the spring wire 43 is only displaced so that it may be separated from the outer peripheral surface of the guide part 42a. Therefore, by using the common claw 29, the electric operating mechanism and the mechanical operating mechanism can be installed at relatively low cost.

Therefore, even if the mover 46a or the locking arm 41 does not move even when the electric actuator 46 is interrupted by the state of being energized by the electromagnetic actuator 46 or any failure, the car 4 ), The emergency stop device 7 can be operated as usual by the rotation of the flyweight 25a by centrifugal force.

In addition, the lower starting device 14 provided in the tension sheave device 10 is configured to operate the emergency stop device 7 when the car 4 moves upward, thereby electrically stopping in both up and down directions. The device 7 can be activated.

In addition, the operation test of the emergency stop device 7 can be easily performed by interrupting the energization of 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 which shows the principal part of the governor by Embodiment 2 of this invention, and the structure of the whole elevator is the same as that of Embodiment 1. FIG. Rope groove in which the governor rope 11 is inserted is provided in the outer peripheral part of the sheave 70 which is a rotating body in the figure. In the second embodiment, the cross-sectional shape of the rope groove is' V'-shaped, whereby the frictional force with the governor rope 11 is increased.

Therefore, by increasing the mass of the tension sheave device 10 to secure the tension of the governor rope 11 properly, the sheave 70 and the governor required to start the emergency stop device 7 when the rotation of the sheave 70 is stopped. The friction force of the rope 11 can be secured.

Thereby, the parts for holding the governor rope 11 in Embodiment 1 (FIG. 2), namely, the arm 31, the shoe 32, the spring shaft 33, the connection lever 34, and the spring receiving member 35 and the rope gripping spring 36 and the like are omitted. In addition, unlike the first embodiment, the main ratchet 77 is fixed so as not to rotate with respect to the sheave shaft 22 which is a fixed shaft in order to stop the rotation of the sheave 70.

The sheave shaft 22 of the sheave 70 is provided with an engagement disk (small ratchet) 72 that is relatively rotatable with the sheave 70. In the outer peripheral portion of the engaging disk 72, a plurality of teeth are provided continuously over the entire circumference. In addition, the engaging disk 72 is integrally provided with a cam plate 71 having a shape in which the first and second flyweights 74a and 74b are opened by rotation relative to the sheave 70.

The flyweights 74a and 74b are provided with rotatable rollers 75a and 75b, respectively. The engaging disk 72 is equipped with a torsion spring 73 for always bringing the cam plate 71 into contact with the rollers 75a and 75b.

The base 23 (FIG. 2) is provided with the locking arm 76 which can be rotated centering around the shaft 76a. The locking arm 76 is provided with a stopper portion 76b that meshes with the teeth of the engagement disk 72. The stopper portion 76b protrudes parallel to the axial direction of the engaging disk 72. In addition, a tension spring 44 (FIG. 2) is provided between the upper end of the locking arm 76 and the base 23. The tension spring 44 presses the locking arm 76 in the direction in which the stopper portion 76b engages with the teeth of the engagement disk 72 (clockwise in FIG. 8).

A pin 76c is provided at the lower end of the locking arm 76. The link plate 45 is rotatably connected to the pin 76c. The electromagnetic actuator 46 is fixed to the base 23. The electromagnetic actuator 46 has a mover 46a connected to the link plate 45. In addition, the electromagnetic actuator 46 resists the tension spring 44 and rotates the locking arm 41 in the direction in which the stopper portion 41b falls (counterclockwise in FIG. 8) from the teeth of the engaging disk 42. .

In Embodiment 2, the rotating body stop mechanism which stops rotation of the sheave 70 has the main ratchet 77 and the claw 29. The interlock mechanism has a cam plate 71, flyweights 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 along the cam plate 71 by the relative rotation of the sheave 70 with respect to the engagement disk 72. 75a and 75b are displaced radially outward of the sheave 70. As a result, the flyweights 74a and 74b are rotated so that the rotating body stop mechanism is operated, that is, the claw 29 is engaged with the main ratchet 77. The other configuration is the same as that of the first embodiment.

Next, the operation will be described. The electronic actuator 46 is always in an energized state during normal driving and stopping of the car 4. On the other hand, when the brake failure 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, the car 4 is unbalanced by the unbalanced load. When it is moved unintentionally and when 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.

When the energization to the electromagnetic actuator 46 is cut off, the locking arm 76 is rotated clockwise in FIG. 8 by the load of the tension spring 44 so that the stopper portion 76b is engaged with the teeth of the engaging disk 72. All.

Thereafter, the sheave 70 continues to rotate in the counterclockwise direction of 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 71, the flyweights 74a and 74b are centered around the pins 24a and 24b. It rotates counterclockwise to open.

As the flyweight 74a opens, the claw 29 is rotated counterclockwise in FIG. 8 so that the tip of the claw 29 meshes with the teeth of the main ratchet 77. As a result, the rotation of the sheave 70 is stopped, the governor rope 11 is frictionally held by the friction force between the governor rope 11 and the rope groove of the sheave 70, and the emergency stop device 7 Will work.

By such an elevator safety device, the emergency stop device 7 can be immediately operated by the electromagnetic actuator 46, and the electronic actuator 46 can be miniaturized. In addition, by using the common claw 29, the electric operating mechanism and the mechanical operating mechanism can be installed in a relatively low cost.

Embodiment 3:

Next, FIG. 9 is a front view which shows the principal part of the governor by Embodiment 3 of this invention. In the figure, the side of the sheave 21 is mounted with a trip lever 62 which is rotatable about an axis 61 parallel to the pin 24a. The trip lever 62 has a projection 62a that meshes with the claw 29.

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 for pressing the trip lever 62 in a direction (clockwise in FIG. 9) to abut the flyweight 25a.

A tension spring 64 is provided between the claws 29 and the sheave 21 to press the claws 29 in the direction in which the claws 29 engage with the main ratchet 30. Although the claw 29 is normally engaged with the projection 62a of the trip lever 62 and separated from the main latch 30, when the engagement with the trip lever 62 is displaced, the claw 29 is rotated by the spring force of the tension spring 64. And the main latch 30 is engaged.

The sheave shaft 22 is provided with an engaging disk 65 which is rotatable relative to the sheave 21. The engagement disk 65 is normally rotated integrally with the sheave 21. On the outer circumferential portion of the engaging disk 65, a plurality of teeth are provided continuously over the entire circumference. In addition, a cylindrical guide portion 65a for the sheave shaft 22 is provided on one side surface of the engaging disk 65.

The guide part 65a is provided with the 1st and 2nd rotation control parts 65b and 65c. The first rotation restricting portion 65b abuts against the spoke portion of the sheave 21, thereby restricting the engagement disk 65 from rotating relative to the sheave 21 in the counterclockwise direction of FIG. In addition, the second rotation restricting portion 65c abuts against a spoke portion different from the spoke portion to which the first rotation restricting portion 65b abuts, so that the engaging disk 65 is clockwise in FIG. 9 with respect to the sheave 21. To regulate relative rotation.

Therefore, the engaging disk 65 is relatively rotatable with respect to the sheave 21 only within a predetermined angular range (acute angle range). Normally, 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.

Between the protrusion part 62a of the trip lever 62, and the guide part 65a, the trigger board 66 as a transmission member comprised by the thin leaf spring is assembled. The proximal end of the trigger plate 66 is fixed to the guide portion 65a. Moreover, as shown in FIG. 10, the rectangular opening 66a is provided in the front-end | tip part of the trigger board 66. As shown in FIG. And the projection part 62a of the trip lever 62 is inserted in the opening part 66a.

The locking arm 51 is provided on the side surface of the main ratchet 30 so as to be rotatable about the shaft 51a. The shaft 51a is provided in the longitudinal middle part of the locking arm 51. The stopper part 51b which engages with the tooth of the engaging disk 65 is provided in the longitudinal middle part of the locking arm 51. As shown in FIG. The stopper part 51b protrudes in parallel to the sheave shaft 22 from one side surface of the locking arm 51.

The tension spring 54 which presses the stopper part 51b in the direction which engages with the engagement disk 65 is attached between the one end part (left end part) of the locking arm 51, and the main ratchet 30. As shown in FIG. The base 23 (FIG. 2) is provided with the guide plate 55 which rotates centering around the rotating shaft 55a. The guide plate 55 is provided with the long hole 55b.

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

The electromagnetic actuator 56 is assembled to the base 23. The electromagnetic actuator 56 has a movable body 56a that abuts on the upper surface of the locking arm 51, and an electromagnetic magnet 56b that attracts the movable body 56a.

The mover 56a has a normal position (Fig. 9) which protrudes downwardly from the electromagnetic magnet 56b, and a stop position which is displaced upward from the normal position to engage the stopper portion 51b with the engaging disk 65 (Fig. 9). 3) It can be displaced between. Moreover, the surface (lower end surface) which contacts the locking arm 51 of the movable body 56a is hemispherical.

When the mover 56a is in the normal position, it abuts on the other end of the locking arm 51 and resists the tension spring 54 to hold the stopper portion 51b at a position away from the engaging disk 65.

In Embodiment 3, the engagement disk stop mechanism has a locking arm 51 and a tension spring 54. The interlock mechanism has a trigger plate 66, a trip lever 62, a claw 29, a tension spring 64, and a main latch 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 claw of the trip lever 62 is caused by the rotation of the sheave 70 with respect to the trigger plate 66. The engagement with (29) is released. As a result, the claw 29 meshes with the main ratchet 30, the main ratchet 30 rotates together with the sheave 21, and the rotating body stop mechanism is operated.

In addition, the stop motion transmission mechanism includes the above-mentioned engagement disk stop mechanism, the interlock mechanism, and the engagement disk 65, and the sheave (before the sheave 21 is stopped after displacing the mover 56a to the stop position ( With the rotation of 21, the mover 56a is returned to the normal position side. At this time, the stop motion transmission mechanism returns the movable element 56a to the normal position side by using the own weight of the movable element 56a. The other configuration is the same as that of the first embodiment.

Next, the operation will be described. The electronic actuator 56 is always in an energized state during normal driving and stopping of the car 4. On the other hand, when the brake failure 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, the car 4 is unbalanced by the unbalanced load. When it is moved unintentionally and when 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 56 is cut off.

When the energization to the electromagnetic actuator 56 is cut off, as shown in FIG. 11, the locking spring 51 is rotated counterclockwise by the tension spring 54, and the mover 56a is moved to the stop position. Is displaced. As a result, the stopper portion 51b is engaged with the engagement disk 65, and the rotation of the engagement disk 65 is stopped.

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

As a result, the engagement between the protrusion 62a and the claw 29 is displaced, and the claw 29 is engaged with the main ratchet 30 by the load of the tension spring 64. As shown in FIG. 12, the main ratchet 30 is rotated, the arm 31 is inclined, and the shoe 32 is pushed onto the governor rope 11 to stop the circulation of the governor rope 11. The emergency stop device 7 is operated.

In addition, 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 about the base 23 about the axis 55a in the clockwise direction of the drawing. For this reason, the stopper part 51b is restrained by the long hole 55b of the guide plate 55, and falls from the tooth of the engaging disk 65. FIG. In this state, the spring force of the tension spring 54 acts on the edge of the long hole 55b. Moreover, the contact point where the axis line (up-down direction) of the movable element 56a and the locking arm 51 cross | moves is moved downward, and the movable element 56a is moving to the vicinity of a normal position by self weight.

That is, after the energization to the electromagnetic actuator 56 is cut off, the mover 56a is once moved upwards by the load of the tension spring 54, but until the position which stops circulation of the governor rope 11 is stopped. When the rotation arm 30 is rotated, the locking arm 51 retracts below the normal position, so that the movable member 56a moves downward due to its own weight.

In this manner, when the main ratchet 30 is rotated, the stopper portion 51b of the locking arm 51 falls from the teeth of the engaging disk 65, and the movable body 56a is returned by its own weight. The magnet 56b does not need to suck the mover 56a over a long distance.

In the return operation after the emergency stop device 7 is operated, the claw 29 is brought to the trip lever 62 side by energizing the electromagnetic actuator 56 and keeping the movable body 56a at the normal position. It may be engaged again (for example, see Japanese Patent Application Laid-Open No. 2002-370879).

By such an elevator safety device, the emergency stop device 7 can be operated immediately by the electromagnetic actuator 56, and the electronic actuator 56 can be miniaturized. In addition, by using the common claw 29, the electric operating mechanism and the mechanical operating mechanism can be installed in a relatively low cost.

Embodiment 4.

Next, FIG. 13 is a front view which shows the principal part of the elevator safety device which concerns on Embodiment 4 of this invention. In Embodiment 4, the conventional mechanical governor 9 which operates the emergency stop device 7 only when the cage | basket | car 4 is traveling downward is provided in the upper part of the hoistway 1. As shown in FIG. Then, the electric first starting device 81a for operating the emergency stop device 7 when the car 4 is traveling in the upward direction and the emergency stop when the car 4 is traveling in the downward direction. An electric second starting device 81b for operating the device 7 is provided in the tension sheave device 10.

The mounting plate 82 is fixed to the rear surface of the car guide rail 6. The mounting plate 82 is provided with a horizontal shaft 83 for supporting the tension sheave device 10. The base end of the mounting arm 84 is rotatably attached to the shaft 83. A plurality of teeth 84a are partially provided on the outer circumferential portion of the proximal end of the mounting arm 84.

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

As a result, when elongation occurs in the governor rope 11, the tension sheave device 10 is moved downward to maintain the tension of the governor rope 11, and the tension sheave device 10 moves upward. The movement to is prevented.

Next, the configuration of the tension sheave device 10 will be described. The base 80 is attached to the lower portion of the mounting arm 84. The base 80 is equipped with a sheave 87 which is a second rotating body in which the governor rope 11 is wound. The upper end part of the governor rope 11 is wound around the sheave 21 (FIG. 2) of the governor 9 which is a 1st rotating body. The sheaves 87 and 21 are rotated with the lifting and lowering of the car 4. Moreover, a weight 80a for assembling a sufficient tension to the governor rope 11 is assembled below the base 80.

The first starting device 81a is mainly arranged on one side of the sheave 87, and the second starting device 81b is mainly arranged on the other side of the sheave 87. The first starting device 81a stops the rotation of the sheave 87 in the counterclockwise direction in FIG. 13. In addition, the second starting device 81b stops the rotation of the sheave 87 in the clockwise direction in FIG. 13. Since the structures of the first and second starting devices 81a and 81b are the same as those of the upper starting device 13 of the first embodiment, detailed description thereof will be omitted.

However, since the governor 9 which operates mechanically is provided separately, the sheave 87 was not provided with the flyweight. Moreover, the sheave 87 is provided with the contact part which the stopper part 88a, 88b of the claws 89a, 89b abuts normally.

Next, the operation will be described. First, when the car 4 is moving downward, the sheave 87 is rotated counterclockwise in FIG. Here, when the stop command signal is issued from the control system, the energization to the electromagnetic actuators (first and second actuators) 106a and 106b is simultaneously interrupted. As a result, the stopper portions of the locking arms 101a and 101b abut against the engaging disks 102a and 102b.

Since the engaging disks 102a and 102b are rotated counterclockwise in Fig. 13, the locking arm 101a is engaged with the teeth of the engaging disk 102a to stop rotation, but the locking arm 101b is engaged with the engaging disk 102b. In contact with the outer circumference of the), the gear is not engaged with the tooth by repeatedly moving up the gentle slope of the tooth and falling into the valley. For this reason, only the claw 89a is engaged with the main ratchet 90a, and the shoe 92a is pushed by the governor rope 11 on the sheave 87. As shown in FIG.

In this state, when the car 4 continues to move downward, the governor rope 11 tries to rotate the mounting arm 84 counterclockwise in FIG. 13, but is blocked by the stopper 86. For this reason, the lever 12 is inclined 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 to the electromagnetic actuators 106a and 106b is started. At this time, since the mover of the electromagnetic actuator 106a is returned to the normal position side by the rotation of the main ratchet 90a, the state is maintained in 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 rotate the sheave 87 in the clockwise direction in order to release the engagement of the emergency stop device 7 to the car guide rail 6, the locking arm 101a is returned to the normal position. Almost simultaneously with this, since the locking arm 101b restrains the rotation of the engaging disk 102b, the claw 89b is engaged with the teeth of the main ratchet 90b so that the main ratchet 90b is clockwise in FIG. Is rotated. As a result, the mover of the electromagnetic actuator 106b is returned to the normal position side and held at the normal position by the suction force of the electromagnetic actuator 106b.

Thereafter, by moving the car 4 in the downward direction again, the locking arm 101b is returned to the normal position, and the return operations of the emergency stop device 7 and the starting devices 81a and 81b are completed. .

On the other hand, when the car 4 is moving upward, the sheave 87 is rotated clockwise in FIG. 13. Here, when the stop command is issued from the control system, the energization to the electromagnetic actuators 106a and 106b is cut off at the same time. As a result, the stopper portions of the locking arms 101a and 101b abut against the engaging disks 102a and 102b.

Since the engaging disks 102a and 102b are rotated in the clockwise direction of FIG. 13, the locking arm 101b is engaged with the teeth of the engaging disk 102b to stop the rotation, whereas the locking arm 101a stops rotating. It does not engage the engagement disk 102a. For this reason, only the claw 89b is engaged with the main ratchet 90b, and the shoe 92b is pushed by the governor rope 11 on the sheave 87. As shown in FIG.

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. 13, but is blocked by the stopper 86. Therefore, the lever 12 is inclined downward relative to the car 4, and the emergency stop device 7 operates. The return operation is the same as above.

By such an elevator safety device, the emergency stop device 7 can be immediately operated by the electromagnetic actuators 106a and 106b, and the electronic actuators 106a and 106b can be miniaturized. In addition, by providing the starting devices 81a and 81b in the tension sheave device 10, the electric operating mechanism and the mechanical operating mechanism can be easily installed.

In addition, the first and second starting devices 81a and 81b for operating the emergency stop device 7 in both directions are collectively arranged in one position on the tension sheave device 10 side, whereby the electromagnetic actuator 106a, The wiring and the control device for 106b) can also be concentrated in one place, making the device configuration simpler.

In addition, although not shown in Embodiment 4, you may use the means which detects that the movable parts of the electromagnetic actuators 106a and 106b are hold | maintained in a normal position. In this case, by detecting the holding of the mover and stopping the movement of the car 4, the efficiency of the return operation can be improved, and the damage of the car guide rail 6 can be suppressed, so that the car guide can be suppressed. The extra effort to repair the rail 6 can be omitted.

Moreover, in Embodiment 4, although the governor 9 was arrange | positioned at the upper part of the hoistway 1, and the 1st and 2nd starting devices 81a and 81b were arrange | positioned under the hoistway 1, you may arrange | position in reverse.

In addition, although the electronic actuator was shown as an actuator in Embodiment 1-4, an actuator is not limited to this.

Claims (3)

Rotating body rotated with the lifting of the car,
Rotor stop mechanism for mechanically stopping the rotation of the rotor,
Emergency stop means for emergency stopping the car by the rotation of the rotating body being stopped;
An actuator having a movable position that is displaceable between a normal position and a stop position for operating the rotating body stop mechanism, and an electromagnetic magnet that maintains the movable element in the normal position by being energized;
It is provided with a stop motion transmission mechanism for stopping the energization of the electromagnetic magnet, thereby displacing the mover from the normal position to the stop position, and operating the rotating body stop mechanism to stop the rotating body.
And said stop motion transmission mechanism returns said mover to its normal position with rotation of said rotor until said rotor is stopped after displacing said mover to a stop position. The method according to claim 1,
The movable member is displaceable in the vertical direction between the normal position and the stop position,
And the stop motion transmission mechanism returns the mover to the normal position by using the own weight of the mover. The method according to claim 1,
The stop motion transmission mechanism,
An interlocking disk provided coaxially with the rotating body, relatively rotatable with respect to the rotating body, smaller in diameter than the rotating body, and normally rotating integrally with the rotating body;
An engaging disk stop mechanism for mechanically stopping the rotation of the engaging disk;
And when the rotation of the engaging disk is stopped by the engaging disk stop mechanism, the interlock mechanism stops the rotating body by operating the rotating body stopping mechanism in association with the relative rotation of the rotating body relative to the engaging disk. ,
The interlock mechanism,
It is provided coaxially with the rotating body and has a main rachet for operating the rotating body stopping mechanism by being rotated.
The engaging disk stop mechanism,
Is provided rotatably on the side of the main ratchet, has a locking arm provided with a stopper for engaging the engaging disk to stop the rotation of the engaging disk,
An elevator safety device in which the movable arm is returned to the normal position side by displacing the locking arm by rotation of the main ratchet.

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