JP2002020056A - Speed governor for elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a speed governor for an elevator reducing the vibration by improving the rotation balance of a sheave and completely preventing the malfunction by preventing the restraint of a rope from being naturally released. SOLUTION: This speed governor for the elevator can actuate an emergency halt device. When the lowering speed of a riding car 1 becomes a prescribed value or more, a jaw of a centrifugal pendulum 40 is engaged with a ratchet wheel 18, the ratchet wheel 18 is integrally and rotationally moved with the sheave 16, and a clutch device 30 being actuated by the rotational movement of the ratchet wheel 18 and restraining by pushing a rope 13 against the sheave 16 is provided. A gear 43 rotationally moved along with the ratchet wheel is provided and a latch 44 limiting its rotation direction is engaged with the gear 43.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speed governor for an elevator, and more particularly, to restraining a rope connected to an emergency stop device provided in the elevator car when the descending speed of the elevator car exceeds a predetermined value. The present invention also relates to an elevator governor that operates its safety gear.

[0002]

2. Description of the Related Art As for the lowering speed of a car of an elevator, a device must be provided to automatically stop the lowering of the car when the lowering speed of the elevator exceeds a prescribed value in the Building Standard Law. In general, an emergency stop device is attached to the car.

FIG. 12 is a diagram showing a schematic configuration of an elevator in which the emergency stop device is mounted on a car. The car 1 of the elevator is suspended by a main rope 2 and the left and right sides of the car 1 By engaging a guide device 3 provided in the upper and lower portions with a guide rail 4 erected in the hoistway, the car 1 can move the guide rail 4.
It is configured to rise and fall along. The car 1 is provided with emergency stop devices 5 and 5 each having a wedge-shaped member pressed against the guide rail 4 on the lower surface of the left and right ends of the lower beam 1a, for example.

A lift rod 6 is attached to both emergency stop devices 5.
The top ends of the lift rods 6 are connected to each other by a safety link 9 composed of left and right crank levers 7 that are swingably provided on the car and links 8 that connect the two crank levers 7. Are linked.

On the other hand, in the hoistway, for example, a rope 13 wound around a governor 11 provided in a machine room 10 and a tensioner 12 provided in the hoistway and moving at the same speed in the same direction as the car 1. The one end of the safety link 9 is connected to the rope 13.

Therefore, when the main rope 2 suspending the car 1 is broken,
When the governor 11 detects the descending speed of the car 1 and the descending speed reaches a specified speed, a gripping device described later provided in the governor 11 is operated to restrain the rope 13. Therefore, the car 1 on which the rope 13 descends
, Whereby the left and right lift rods 6 are simultaneously pulled up via the safety link 9, the wedge-shaped member of the safety device 5 is pressed against the guide rail 4, and the car 1 is stopped. .

FIG. 13 is a plan view of the governor 11, and FIG.
FIG. 15 is a partially cutaway front view, and FIG. 15 is a view showing details of a portion C in FIG. 14. A sheave 16 on which the rope 13 is wound around a frame 15 of the governor 11 is A ratchet wheel 18 is rotatably mounted on the sheave shaft 17.

The sheave 16 is provided with two centrifugal pendulums 19 each having a weight 19a provided at one end thereof symmetrically with respect to the sheave shaft 17, and is mounted so as to be swingable about a shaft 20. . The two centrifugal pendulums 19 are connected to a connecting link 21 and swing in synchronization with each other. The other end of one of the centrifugal pendulums 19 is connected to a governing spring 22.
And the speed control spring 2
2, the weight 19a is normally urged to be located radially inward with respect to the sheave 16.

An overspeed switch bolt 23 is provided on the weight 19a of the centrifugal pendulum 19, and when the sheave 16 exceeds the specified speed and the weight 19a of the centrifugal pendulum 19 moves outward in the radial direction, the overspeed switch bolt 23 is provided. The overspeed switch 24 is operated by the speed switch bolt 23 to cut off electricity required for driving the elevator.

On the other hand, as shown in FIG. 15, a ratchet claw 25 is pivotally attached to the shaft 20 of the centrifugal pendulum 19, and the tip of the ratchet claw 25 is extended by a spring 26 stretched between the shaft 20 and the sheave 16. The ratchet wheel 1
It is biased in eight directions. The other end of the ratchet pawl 25 has a ratchet pawl releasing device 28 pivotally attached to a shaft 27.
Of the ratchet wheel 25 is elastically pressed by a spring 29, and the ratchet pawl 25 is held in a disengaged state with the ratchet wheel 18.

A gripping device 30 is attached to the frame 15 of the speed governor 11 to press the rope 13 against the sheave 16 and restrain it. That is, the frame 15 is provided with an operating rod 32 having a gripper 31 fixed to an intermediate portion thereof on the shaft 3.
3 and is pivotally attached to the operating rod 32.
A rod 34 whose base end is connected to the ratchet wheel 18 is fitted into the distal end of the rod 34. This rod 34
Spring support 35 provided at the tip of
2, a spring 36 is interposed therebetween.
Thus, the gripper 31 is urged in the outer circumferential direction of the sheave 16. Thus, when the sheave 16 is rotating at the rated speed of the elevator, the force of the governing spring 22 exceeds the centrifugal force generated in the centrifugal pendulum 19, but when the speed exceeds a certain prescribed speed, the centrifugal pendulum 19 The centrifugal pendulum 19 oscillates about the shaft 20 because the centrifugal force generated at the moment exceeds the spring force of the governing spring 22. When the centrifugal pendulum 19 swings in this way, the overspeed switch 24 is operated as described above, and the electricity required for driving the elevator is cut off.

After the operation of the overspeed switch 24, the descending speed of the car increases, and when the operating speed of the emergency stop device is reached, the governing spring 22 is compressed by the centrifugal force of the centrifugal pendulum 19, and 19 itself further swings about axis 20. Accordingly, the ratchet pawl release device 28 is pivoted about the shaft 27 through the bolt 28b provided on the ratchet pawl release device 28 by the swing of the centrifugal pendulum 19, and the pawl 28a is detached from the ratchet pawl 25. . Therefore, the tip of the ratchet pawl 25 is pulled by the spring 26, the ratchet pawl 25 is engaged with the ratchet wheel 18, and the ratchet wheel 18 is rotated in the same direction as the sheave 16. In this way,
When the ratchet wheel 18 rotates in the direction of arrow A, the rod 34 attached to the side surface of the ratchet wheel 18 is pulled in the rotation direction of the ratchet wheel 18, and the operating rod 32 swings via a spring 36, and the gripper 31 Presses the rope 13 against the sheave 16 to fix it.
When the sheave 16 and the ratchet wheel 18 are further rotated, the spring 36 is compressed, and the rope 13 is strongly pressed by the sheave 16 via the gripper 31 by the reaction force, and the movement of the rope 13 is restrained. You. This restraining force can be adjusted by selecting the spring 36 and initial setting.

When the rope 13 is restrained in this way, the rope 1 is moved relative to the descending car 1 as described above.
3 is raised relatively, whereby the safety devices 5 and 5 are operated via the safety link 9 and the car 1
Is stopped.

[0014]

However, in the speed governor as described above, regardless of whether the sheave 16 is constantly rotating in accordance with the movement of the car 1, the sheave 16 has a ratchet claw 25 or a ratchet. Since the claw release device 28 is mounted, it is difficult to balance the rotation of the sheave 16, and unnecessary vibration may be applied to each part, and unnecessary repeated stress may be generated on the sheave and the shaft 17. In addition, sheave 16
There is also a possibility that the overspeed switch 24 is operated with the acceleration generated in the above.

Accordingly, a first object of the present invention is to provide an elevator speed governor with improved operation and improved vibration balance, less vibration and accurate operation.

The reason why the ratchet claw 25 and the ratchet claw release device 28 are used for the governor 11 is to prevent the operation of restraining the rope 13 from being released naturally for safety. For example, if the speed governor operates once due to malfunction due to excessive vibration or the like or when the operation of the emergency stop device at the time of maintenance inspection is performed, the ratchet claw 25 bites into the ratchet wheel 18 so that the worker can manually Unless the ratchet claw 25 is returned to the original position by the work, it cannot be recovered. However, there is a ratchet claw 25 on the rotating part called the sheave 16, and in this case, depending on the operation state of the governor, the ratchet claw 25 is located at the upper part of the governor or is located at the lower part, so that the return operation is performed manually. The ratchet 25 may be located at a position where it is difficult.

Therefore, a second object of the present invention is to make it easier to recover the governor while improving the safety of workers while preventing the restraint of the rope from being released naturally. An object of the present invention is to provide an elevator governor capable of preventing malfunction caused by ratchet claws.

Further, in recent elevators, many elevators without a machine room are manufactured, and in such an elevator, a governor is usually installed in a hoistway. Therefore, when the governor installed in the hoistway performs rope restraint operation, unlike the case where the governor is installed in the machine room, the recovery operation of the governor enters the hoistway and recovers. And at that time, depending on the position of the car, it can be dangerous to work. It is permissible to operate the governor only in rare cases such as when the main rope is broken.However, the operation of the governor during inspection during elevator installation and elevator maintenance and inspection is also permitted. Had to be checked and required a great deal of labor from inspection workers.
If this is improved by providing an entrance that allows entry into the hoistway, there is a possibility that a third party may enter and fall, and the design of the building may be impaired.

Accordingly, a third object of the present invention is to enable remote recovery from outside the hoistway when the governor performs rope restraint operation in an elevator without a machine room, thereby improving the safety and workability of workers. The objective is to obtain an elevator governor with improved.

[0020]

The invention according to claim 1 is
An elevator governor that restrains a rope connected to an emergency stop device provided in the car when the descending speed of the elevator car is equal to or higher than a predetermined value and activates the emergency stop device, When the lowering speed of the car is equal to or higher than a predetermined value, the claw of the centrifugal pendulum is engaged,
A ratchet wheel that is turned integrally with the sheave on which the rope is wound, a gripping device that is actuated by the rotation of the ratchet wheel and presses and restrains the rope against the sheave, and turns with the ratchet wheel And a latch which is urged in the tooth direction of the gear and restricts the rotation direction of the gear by engagement with the tooth.

According to a second aspect of the present invention, in the first aspect, the gear is coaxially fixed to the ratchet wheel.

According to a third aspect of the present invention, in the first aspect of the present invention, the gripping device includes an operating rod that is swung by rotation of the ratchet wheel, and a gripping device provided on the operating rod and pressing the rope against the sheave. And a spring for urging the operating rod in a direction to appropriately maintain the rope restraining force by the gripping tool, and the swinging shaft of the operating rod rotates integrally with the swing of the operating rod. A gear is provided.

According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the latch engaged with the gear is provided with a lever for releasing the engagement of the latch. And

According to a fifth aspect of the present invention, when the descending speed of the elevator car exceeds a predetermined value, the rope connected to the emergency stop device provided in the car is restrained, and the emergency stop device is operated. In the elevator governor, the ratchet wheel that is turned integrally with the sheave on which the rope is wound when the descending speed of the car becomes a predetermined value or more, and the ratchet wheel of the ratchet wheel. A gripping device that is actuated by rotation and presses and restrains the rope against the sheave, and a retractable device that engages with a hole provided in the ratchet wheel during the rope restraining operation and prevents the ratchet wheel from moving in the rope restraining release direction. And a special claw member.

According to a sixth aspect of the present invention, when the descending speed of the elevator car exceeds a predetermined value, the rope connected to the emergency stop device provided in the car is restrained, and the emergency stop device is operated. In the elevator governor, the ratchet wheel that is turned integrally with the sheave on which the rope is wound when the descending speed of the car becomes a predetermined value or more, and the ratchet wheel of the ratchet wheel. A gripping device that is actuated by rotation and presses and restrains the rope against the sheave, and engages with a hole provided in a rod that interlocks the rotation of the ratchet wheel and the movement of the gripping device during rope restraining operation, and And a retractable claw member for preventing movement in the rope restraint releasing direction.

According to a seventh aspect of the present invention, in the invention of the fifth or sixth aspect, a release jig for releasing engagement with a ratchet wheel or a rod is detachably attached to the claw member. It is characterized by the following.

According to an eighth aspect of the present invention, in the invention of the fourth or seventh aspect, one end of a wire is connected to a release jig mounted on the disengagement lever or the claw member, and , And is connected to a remote release lever.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In addition, FIG.
2 to FIG. 15 are denoted by the same reference numerals, and detailed description thereof will be omitted.

FIG. 1 is a view showing a first embodiment of an elevator governor according to the present invention. FIG. 2 is an enlarged view of a main part of FIG.
FIG. 3 is an explanatory diagram of the operation state. In FIG.
Reference numeral 0 denotes a governor for an elevator, and a pair of left and right centrifugal pendulums 4
1 is attached to the sheave 16. The pair of centrifugal pendulums 41 are mounted symmetrically with respect to the sheave shaft 17 so as to be swingable about a shaft 42, respectively. A weight 41a is formed at one end of the centrifugal pendulum 41, and the left and right centrifugal pendulums 41 are connected by a connecting link 21 so as to operate in synchronization with each other. Also,
Each of the centrifugal pendulums 41 has a claw 41 for biting the ratchet wheel 18 on the side opposite to the weight 41 a with respect to the shaft 42.
b is formed.

A gear 43 is fixed coaxially to the ratchet wheel 18 on the side surface of the ratchet wheel 18 in the frame 15. On the other hand, a latch 44 having a claw 44 a that engages with the teeth of the gear 43 is pivotally connected to the frame 15 by a shaft 45. Latch 4 above
A lever 46 is mounted on the fourth shaft 45. That is, as shown in FIG. 4, the latch 44 is integrally connected to the shaft 45 by the key 47, and the lever 46 is fixed to the shaft 45. Further, the latch 44 is provided with a tension spring 47.
As a result, the claw 44a is urged in a direction to engage with the teeth of the gear 43. Teeth of gear 43 and claws 44 of latch 44
a is formed as shown in FIG. 2 and the like, and in the figure of the gear 43, rotation in the counterclockwise direction is permitted, but rotation in the clockwise direction is prevented. Other configurations are different from each other in shape, but are similar to the conventional configuration.

When the rotation speed of the sheave 16 of the governor 1 becomes equal to or higher than a predetermined value, the weight 41a of the centrifugal pendulum 41
The claw 41b of the centrifugal pendulum 41 is rotated about the shaft 42 in the direction of the arrow A in FIG. 2 by the centrifugal force F generated in FIG. Therefore, the ratchet wheel 18 is connected to the sheave 1
6 is turned in the same direction as
1 is swung counterclockwise in FIG. 1 about the shaft 33, and the rope 13 is pressed against the sheave 16 by the gripper 31.

On the other hand, the gear 43 is a ratchet wheel 18.
Rotate the same amount in the same direction (counterclockwise in the figure) as
The claw 44a of the latch 44 is engaged with the teeth of the gear 43 so as to prevent the gear 43 from rotating in the opposite direction, so that the rope restraining state by the gripper 31 is naturally released. Is prevented.

As described above, in the present embodiment, since the ratchet pawl, ratchet pawl releasing device, and ratchet pawl tension spring of the conventional device are eliminated from the rotating portion of the sheave 16, the rotational balance is improved. Further, since the mechanism for maintaining the rope restraining operation is at a fixed position in the governor frame 15, the restoring operation can be easily restored by the compressed spring 36 by removing the latch 44 from the gear 43. Further, since the latch 44 is always in contact with the gear 43 by the tension spring 47, the operation of removing the ratchet pawl in the conventional governor by the ratchet pawl release device is eliminated, and the operation of the governor caused by this operation is eliminated. Malfunction can be completely prevented.

By attaching the lever 46 to the shaft 45 of the latch 44, the operation of the lever 46 allows the latch 44 to be released from the gear 43 very easily.

FIG. 5 is a front view showing a second embodiment of the elevator governor of the present invention. The ratchet wheel 18 is provided with a plurality of inclined holes 48 in the circumferential direction. On the other hand, a claw member 49 capable of engaging with the hole 48 is provided on the frame 15 so as to be able to advance and retreat.

FIG. 6 is a plan sectional view of a portion A in FIG. 5. The hole 48 provided in the ratchet wheel 18 is provided in the direction (the direction of the arrow) in which the ratchet wheel 18 rotates when the car descends. The wall surface 48a on the rotation direction side is perpendicular to the side surface of the ratchet wheel 18, and the wall surface 48b on the opposite side in the rotation direction is inclined toward the opposite side in the rotation direction and toward the frame 15 side.

On the other hand, the claw member holding cylinder 50 is
Is fixed, and the claw member 4 is provided in the claw member holding cylinder 50.
9 is provided so that it can advance and retreat. The tip end surface of the claw member 49 is an inclined surface that is inclined so that the height decreases toward the opposite side from the end in the direction in which the ratchet wheel 18 rotates when the car descends. It is urged in a direction protruding toward the ratchet wheel 18. The gear 43, the latch 44, and the tension spring 47 are removed. Other points are shown in Fig. 1.
Are the same as those shown in FIG.

When the rotation speed of the sheave 16 exceeds a predetermined value in response to the lowering of the car, the claw 42 of the centrifugal pendulum 40 engages with the ratchet wheel 18 as shown in FIG. Ratchet wheel 18 is sheave 1
6 is rotated in the same direction. Therefore, the rotation of the ratchet wheel 18 causes the rod 34 and the operating rod 3 to rotate.
The gripper 31 is actuated via 2, and the rope 13 is pressed and restrained by the sheave 16.

On the other hand, at the same time, the pawl member 49 is projected by the spring 51 and engages with the hole 48 formed in the ratchet wheel 18 as shown in FIG. That is, since the hole 48 and the claw member 49 are provided with the inclination as described above and can move forward and backward, the rotation of the ratchet wheel 18 in the rope restraining direction is not hindered, but the rotation in the opposite direction is performed by the claw. It is prevented by the engagement between the member 49 and the wall surface 48a of the hole 48. Therefore, it is possible to prevent the restrained state of the rope by the gripper 31 from being released naturally, and it is possible to completely prevent the malfunction of the governor.

FIG. 8 shows a third embodiment of the elevator governor of the present invention.
FIG. 3 is a view showing an embodiment of the present invention,
A hole 52 having an inclined portion is provided similarly to
A claw member 49 provided on the frame 15 is engaged with the hole 52. Other points are the same as those shown in FIG. Accordingly, also in this case, when the rope 13 is pressed and restrained by the sheave 16 when the rope is restrained,
The claw member 49 is engaged with the hole 52, and the restrained state of the rope is maintained, and the restrained state is prevented from being released naturally.

FIG. 9 is a view showing a rope restraining release jig 53 in the rope restraining operation maintaining mechanism shown in FIG. 6 and FIG. Are formed. The claw member 49 is formed with a female screw portion 54 for attaching the rope restraining jig 53 from the base end side.

In order to release the rope restraint, the rope restraint releasing jig 53 is inserted from the jig insertion hole 56 of the spring receiver 55 fixed to the frame 15, and the male screw portion 53 a is inserted into the claw member 49. And is fixed by screwing into the female screw portion 54 of. By pulling the rope restraining jig 53 in the direction opposite to the governor 40, the claw member 49 is released from engagement with the hole 48 or 52, and the rope restraining operation can be released. Therefore, by using the rope restraint releasing jig 53, the releasing operation can be easily performed, and the safety of the worker can be improved.

FIG. 10 is a view showing a fourth embodiment of the elevator governor according to the present invention. The gear 57 for maintaining the rope restraint is not integrated with the ratchet wheel 18 but integrally with the operating rod 32. It is fixed to a rotating shaft 33. On the other hand, a latch 58 having a claw 58 a at the tip thereof which engages with the teeth of the gear 57 is pivotally mounted on the frame 15 by a shaft 59, and the claw 58 a of the latch 58 is engaged with the teeth of the gear 57 by a tension spring 60. It is urged in the direction to match. The shaft 59 is provided with a lever 61 for engaging and disengaging the latch 58 with the gear 57. Other points are the same as those shown in FIG.

Thus, also in this embodiment, the engagement of the gear 57 and the latch 58 prevents the swing of the operating rod 32, and the rope restraining state by the gripper 31 is maintained. By operating the lever 61 to release the latch 58 from the gear 57, the rope restraining operation can be released.

By the way, in an elevator having no machine room and provided with a speed governor in the hoistway, when the governor performs the rope restraining operation, the conventional worker enters the hoistway or For example, the ratchet claw of the governor was restored to the ratchet claw release device by putting a hand through an inspection window or the like and groping. Therefore, a lot of labor of the inspection worker was required.

FIG. 11 shows a structure in which the rope restraint releasing operation can be performed by remote control from outside the hoistway. The levers 46 and 61 or the claw members 49 are provided.
Wire 6 to the rope restraining jig 53 attached to the
2, the wire 62 is connected to a remote release lever 66 provided outside the hoistway 63 through a pulley 64 and a guide tube 65 disposed in the hoistway 63. Therefore, the remote release lever 66 is operated to operate the wire 6.
By pulling 2, the latches 48, 58 or the pawl member 49 can be released from the gears 43, 57, the ratchet wheel 18, or the like, and the rope restraint can be released by remote control.

The mounting position of the speed governor 40 in the hoistway 63 varies depending on the layout of the car 1, the guide rails 4, the hoisting machine 67, and the like. However, this can be handled by using the wire 62 as described above. The rope restraint release operation can be performed from a position away from the governor.

[0048]

As described above, the present invention provides a ratchet wheel which is turned integrally with a sheave via a claw of a centrifugal pendulum when a descending speed of a car exceeds a predetermined value. The rotation of the ratchet wheel activates the gripping device, and a gear that is rotated together with the ratchet wheel and a latch that restricts the rotation direction are provided, or a ratchet or a rod provided with the rod that moves therewith is provided. Since the pawl member for preventing the ratchet wheel from moving in the rope restraint releasing direction is provided, there is no need to provide a ratchet pawl and a ratchet pawl release device on the rotating part, and the rotational balance of the rotating part is improved. It is possible to prevent the restraint of the rope from being released naturally. Further, since the position of the latch or the like is always at a fixed position, the operation of releasing the rope restraining operation can be performed very easily.

In the case where the latch is provided with a lever for releasing the engagement or the claw member is provided with a jig for releasing,
The release operation can be performed very easily, the workability of the recovery work can be improved, and the safety of the worker can be improved. Furthermore, by connecting the wire connected to the lever or the release jig to the remote release lever, the rope restraint release operation can be performed from a position away from the governor, such as from outside the hoistway. , Workability can be improved.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view showing a first embodiment of an elevator governor of the present invention.

FIG. 2 is an enlarged view of a main part of FIG.

FIG. 3 is an explanatory diagram of an operation state of the governor of FIG. 1;

FIG. 4 is a sectional view showing a connecting portion between a latch and a lever.

FIG. 5 is a front view showing a second embodiment of the elevator governor of the present invention.

FIG. 6 is a plan sectional view of a portion A in FIG. 5;

FIG. 7 is a cross-sectional plan view showing a state where the pawl member is engaged with the ratchet wheel.

FIG. 8 is a front view showing a third embodiment of the elevator governor of the present invention.

FIG. 9 is a view showing a relationship between a claw member and a jig for releasing rope restraint.

FIG. 10 is a view showing a fourth embodiment of the elevator governor of the present invention.

FIG. 11 is a schematic diagram showing a remote control device when the elevator governor of the present invention is provided in a hoistway.

FIG. 12 is a view showing a schematic configuration of an operation mechanism of an elevator safety device.

FIG. 13 is a plan view showing an example of a conventional elevator governor.

FIG. 14 is a front view of FIG. 13;

FIG. 15 is an enlarged view of a portion C in FIG. 14;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Riding car 5 Emergency stop device 11 Governor 13 Rope 15 Frame 16 Sheave 18 Ratchet wheel 30 Grasping device 31 Gripping tool 32 Operating rod 34 Rod 40 Centrifugal pendulum 42 Claw 43 Gear 44 Latch 46 Lever 48, 52 hole 49 Claw member 50 Claw member holding cylinder 53 Rope release release jig 57 Gear 58 Latch 61 Lever 64 Pulley 65 Guide tube 66 Remote release lever

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Kiyoshi Sakai 1 Toshiba-cho, Fuchu-shi, Tokyo F-term in Fuchu Works, Toshiba Corporation (reference) 3F304 DA23 DA26

Claims (8)

[Claims] An elevator for restraining a rope connected to an emergency stop device provided on a car when the descent speed of the car of the elevator becomes equal to or more than a predetermined value, and operating the emergency stop device. In the governor, a ratchet wheel that is engaged with a claw of a centrifugal pendulum when the descending speed of the car is equal to or higher than a predetermined value and is rotated integrally with a sheave on which the rope is wound, A gripping device which is operated by the rotation of the ratchet wheel and presses and restrains the rope against the sheave, a gear which is rotated together with the ratchet wheel, is urged in the tooth direction of the gear, and is engaged with the tooth. A speed governor for an elevator, comprising a latch for restricting a rotation direction of a gear. 2. The elevator governor according to claim 1, wherein the gear is fixed coaxially to the ratchet wheel. 3. A gripping device comprising: an operating rod which is swung by rotation of a ratchet wheel; a gripping member provided on the operating rod for pressing a rope against a sheave; and a direction for appropriately maintaining a rope restraining force by the gripping member. A spring for urging the operating rod, and a gear that rotates integrally with the swing of the operating rod is provided on a swing shaft of the operating rod. 2. The elevator governor according to claim 1. 4. The speed governor for an elevator according to claim 1, wherein the latch engaged with the gear is provided with a lever for releasing the latch. . 5. The elevator according to claim 1, wherein when the descending speed of the elevator car exceeds a predetermined value, a rope connected to an emergency stop device provided in the elevator car is restrained and the emergency stop device is operated. In the governor, a ratchet wheel that is turned integrally with the sheave on which the rope is wound when the descending speed of the car is equal to or higher than a predetermined value, and is operated by turning the ratchet wheel. A gripping device that presses the rope against the sheave and restrains the same; and a claw member that engages with a hole provided in the ratchet wheel during the rope restraining operation and that prevents the ratchet wheel from moving in the rope restraint releasing direction. A speed governor for an elevator, characterized in that: 6. An elevator for restraining a rope connected to an emergency stop device provided on a car when a descending speed of the elevator car becomes equal to or higher than a predetermined value, and operating the emergency stop device. In the governor, a ratchet wheel that is turned integrally with the sheave on which the rope is wound when the descending speed of the car is equal to or higher than a predetermined value, and is operated by turning the ratchet wheel. A gripping device that presses the rope against a sheave and engages with a hole provided in a rod that interlocks the rotation of the ratchet wheel with the movement of the gripping device during a rope restraining operation, and the rod is released in a rope restraining release direction. An elevator governor, comprising: a retractable claw member for preventing movement. 7. The speed control for an elevator according to claim 5, wherein a release jig for releasing engagement with a ratchet wheel or a rod is detachably attached to the claw member. Machine. 8. One end of a wire is connected to the release lever or the release jig mounted on the claw member, and the wire is routed to a place having good workability, and the distal end is connected to the remote release lever. The elevator governor according to claim 4 or 7, wherein the elevator governor is connected.