JP2001106454A - Speed governor for elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a speed governor for elevator allowing easy inspecting operations from the hall side even in case the governor is located inside the pit and thereby enhance the operating easiness in the inspection works. SOLUTION: On a base 23 an inspection lever 42 is installed displaceable between the standby position and the inspecting position where a latch part 29 is engaged with a ratchet 30 by rotating a flyweight 25, and the lever 42 is operated remotely from the hall through an inspecting wire 41 so that displacement is generated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a governor for an elevator, which can perform an inspection work remotely even if it is installed in a hoistway.

[0002]

2. Description of the Related Art FIG. 11 is a configuration diagram showing an example of a conventional elevator. In the figure, a driving device 2 is installed in an upper part in a hoistway 1. The main rope 3 is wound around the sheave 2a of the drive device 2. A car 4 is suspended from one end of the main measure 3, and a counterweight 5 is mounted on the other end of the main measure 3.
Is connected. A pair of car guide rails 6 and weight guide rails (not shown) for guiding the car 4 and the counterweight 5 to go up and down are installed in the hoistway 1.

An emergency stop device 7 for stopping the car 4 in an emergency is provided below the car 4. A governor support member 8 is fixed near the upper end of the car guide rail 6. A governor (governor) 9 for detecting an overspeed of the car 6 and operating the safety gear 7 is supported on the governor support member 8.

In the vicinity of the bottom of the hoistway 1, a rotatable pulley 10 is provided. The upper and lower ends of the governor rope 11 are wound around the governor 9 and the tension sheave 10, respectively. The governor rope 11 is connected to the safety gear 7 via a lever 12 and is circulated as the car 4 moves up and down.

[0005] The landing 13 is provided with a landing door 14. The wall 15 of the landing 13 on the top floor is provided with an inspection opening 16 for accessing the governor 9 in the hoistway 1 from the landing 13 side.

FIG. 12 shows, for example, Japanese Patent Application Laid-Open No.
FIG. 1 is a front view showing a conventional governor 9 shown in Japanese Unexamined Patent Application Publication No. H11-157,036.
In the figure, the sheave 21 around which the governor rope 11 is wound is:
It is supported on a base 23 so as to be rotatable about a sheave shaft 22. A pair of fly weights 25 that are rotatable about pins 24 are attached to the side surfaces of the sheave 21. The pair of fly weights 25 are connected to each other by a link 26.

At one end of one fly weight 25,
The operation claw 37 is fixed. Fly weight 25
The sheave 21 is rotated by centrifugal force caused by rotation. Thereby, the operation claw 37 is displaced radially outward of the sheave 21. Between the other end of one flyweight 25 and the sheave 21, there is provided an equilibrium spring 27 against centrifugal force. 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 that is operated by an operating claw 37.

At the other end of one fly weight 25,
A latch section 29 is provided. The base 23 is provided with a ratchet 30 rotatable about the sheave shaft 22a. When the sheave 21 is rotating counterclockwise in FIG.
Are provided with which the latch portion 29 engages when the is rotated by a preset amount.

A shoe 32 pressed against the governor rope 11 is rotatably mounted on an arm 31 rotatably mounted on the base 23. A spring shaft 33 extends through the spring receiving portion 31a of the arm 31. A connection lever 34 is connected between one end of the spring shaft 33 and the ratchet 30. At the other end of the spring shaft 33,
A spring receiving member 35 is provided. Spring receiving part 31a
A rope gripping spring 36 for pressing the shoe 32 against the governor rope 11 is provided between the spring support member 35 and the spring receiving member 35.

Next, the operation will be described. The sheave 21 is rotated by the circulating movement of the governor rope 6 in synchronization with the elevation of the car 4. At this time, fly weight 25
Receives a centrifugal force corresponding to the rotation speed of the sheave 21, that is, the speed of the car 4 while revolving with the sheave 21. When the speed of the car 4 becomes equal to or higher than a predetermined value, the fly weight 25 rotates around the pin 24 against the balance spring 27.

Further, when the speed of raising and lowering the car 4 reaches the first overspeed (usually about 1.3 times the rated speed), the operation claw 37 is turned by the rotation of the flyweight 25 by the centrifugal force, and the car stop switch 28 is turned on. The switch lever 28a is rotated by contacting the switch lever 28a. As a result, the switch 28 is operated, the power supply of the driving device 2 is cut off, and the car is stopped by the brake device of the driving device 2.

Further, for example, when the main measure 3 is broken,
Even if the drive device 2 stops, the car 4 continues to descend without stopping, and when the car speed reaches the second overspeed (normally about 1.4 times the rated speed), the sheave 21 corresponding to this speed
The fly weight 25 is further rotated by the centrifugal force caused by the rotation of the latch, and the latch portion 29 is engaged with the teeth of the ratchet 30. Thus, the ratchet 30 is slightly rotated together with the sheave 21 in the counterclockwise direction in FIG.

The rotation of the ratchet 30 is controlled by the lever 3
4, transmitted to the arm 31 via a spring shaft 33, a spring receiving member 35, and a rope gripping spring 36.
2 is rotated in the counterclockwise direction. Thereby, the shoe 32
Abuts on the governor rope 11, and the shoe 32 is pressed against the governor rope 11 by the rope gripping spring 36, and the governor rope 11 is braked. Governor rope 1
When the circulation of 1 is stopped, the car 4 continues to descend, whereby the lever 12 is operated and the safety gear 7 operates.

In order to confirm the safety function as described above, the operation of the speed governor 9 and the safety gear 7 are checked at the time of inspection. As shown in FIG. 11, in an elevator in which the governor 9 is installed not in the machine room but in the upper part of the hoistway 1, an inspection opening 16 is provided in the wall 15 of the landing 13 on the top floor. The governor 9 is operated from the inspection opening 16.

[0015]

In such a conventional elevator as described above, it is necessary to drill a hole in the wall portion 15 to provide the inspection opening portion 16, which is troublesome and requires fire resistance and design. Will decrease. Also,
The inspection opening 16 is located at a higher place than the landing door 14, and the governor 9 is located further back from the inspection opening 16. Would. On the other hand, there is an example in which the governor 9 is provided at the pit portion (bottom portion) in the hoistway 1. However, in this case, it is necessary for the worker to go down to the pit portion and work, which is troublesome.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and the inspection work can be easily performed from the landing side even when it is arranged in a hoistway. It is an object of the present invention to obtain an elevator governor that can improve workability of inspection work.

[0017]

An elevator governor according to the first aspect of the present invention includes a base installed in a hoistway, a rotatably supported base, and an emergency stop device. A sheave that is wrapped with a governor rope for operation and that rotates according to the elevating speed of the car, and a flyweight that is rotatably attached to the sheave and that is rotated by centrifugal force due to the rotation of the sheave. And a balance spring for urging the flyweight in a direction against the centrifugal force, a ratchet rotatably provided around the sheave shaft of the sheave, and a flyweight provided on the flyweight, wherein the lowering speed of the car is set in advance. Latch that engages the ratchet when the overspeed is reached and rotates the ratchet in the same direction as the sheave, a shoe that brakes the governor rope when the ratchet rotates, a standby position, and a flyweight. Swiveled And inspection lever displaceable between a inspection position to engage the latch portion to the ratchet Te, in which an operating means for displacing by remote control the inspection lever.

According to a second aspect of the present invention, there is provided an elevator governor having a flyweight provided with a roller to be brought into contact with an inspection lever.

According to a third aspect of the present invention, there is provided an elevator governor having a return spring for urging the inspection lever to a normal position, and an inspection wire having a distal end connected to the inspection lever. Is used.

According to a fourth aspect of the present invention, in the elevator governor, the base end of the inspection wire is housed in a landing position indicator, and can be pulled out to the landing side.

According to a fifth aspect of the present invention, in the elevator governor, the base end of the inspection wire is disposed behind the wall of the hall, and can be operated through a gap between the hall door and the three-way frame. It was done.

The elevator governor according to the invention of claim 6 uses operating means having an electromagnetic actuator connected to the inspection lever and displacing the inspection lever.

In the elevator governor according to the present invention, the ratchet is automatically restored to the position before the operation by returning the inspection lever from the inspection position to the standby position.
Thus, braking of the governor rope by the shoe is automatically released.

[0024]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. Embodiment 1 FIG. FIG. 1 is a configuration diagram showing an elevator according to Embodiment 1 of the present invention. In the figure, a driving device 2 is installed in an upper part in a hoistway 1. Drive 2
The main rope 3 is wound around the sheave 2a. A car 4 is suspended from one end of the main measure 3, and a counterweight 5 is connected to the other end of the main measure 3. A pair of car guide rails 6 and weight guide rails (not shown) for guiding the car 4 and the counterweight 5 to go up and down are installed in the hoistway 1.

An emergency stop device 7 for stopping the car 4 in an emergency is provided below the car 4. A governor support member 8 is fixed near the upper end of the car guide rail 6. A governor (governor) 9 for detecting an overspeed of the car 6 and operating the safety gear 7 is supported on the governor support member 8.

In the vicinity of the bottom of the hoistway 1, a rotatable pulley 10 is provided. The upper and lower ends of the governor rope 11 are wound around the governor 9 and the tension sheave 10, respectively. The governor rope 11 is connected to the safety gear 7 via a lever 12 and is circulated as the car 4 moves up and down.

The hall 13 is provided with a hall door 14. An inspection wire 41 is arranged between the governor 9 and the landing 13 on the top floor. A base end, which is an end of the inspection wire 41 on the landing side, is disposed below the landing threshold.

FIG. 2 is a front view showing the governor 9 of FIG. In the figure, the sheave 21 around which the governor rope 11 is wound
Are supported by a base 23 so as to be rotatable about a sheave shaft 22. A pair of fly weights 25 that are rotatable about pins 24 are attached to the side surfaces of the sheave 21.
The pair of fly weights 25 are connected to each other by a link 26.

At one end of one fly weight 25,
The operation claw 37 is fixed. Fly weight 25
The sheave 21 is rotated by centrifugal force caused by rotation. Thereby, the operation claw 37 is displaced radially outward of the sheave 21. Between the other end of one flyweight 25 and the sheave 21, there is provided a balance spring 27 that opposes centrifugal force. 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 that is operated by an operating claw 37.

At the other end of one fly weight 25,
A latch section 29 is provided. The base 23 is provided with a ratchet 30 rotatable about the sheave shaft 22a. When the sheave 21 is rotating counterclockwise in FIG.
Are provided with which the latch portion 29 engages when the is rotated by a preset amount.

A shoe 32 pressed against the governor rope 11 is rotatably mounted on the arm 31 rotatably mounted on the base 23. A spring shaft 33 extends through the spring receiving portion 31a of the arm 31. A connection lever 34 is connected between one end of the spring shaft 33 and the ratchet 30. At the other end of the spring shaft 33,
A spring receiving member 35 is provided. Spring receiving part 31a
A rope gripping spring 36 for pressing the shoe 32 against the governor rope 11 is provided between the spring support member 35 and the spring receiving member 35.

On the base 23, an inspection lever 42 is provided with a shaft 43.
It is attached to be able to swing around. One fly weight 25 is provided with a rotatable roller 44 that is pressed by the inspection lever 42 swinging. A roller 4 is provided between the base 23 and the inspection lever 42.
A return spring 45 is provided for urging the inspection lever 42 in a direction in which the inspection lever 42 is separated from the shutter 4.

The inspection wire 41 is connected to the inspection lever 42.
Are connected. The inspection wire 41 is inserted into a flexible tube 46 and guided to the governor 9. The tip of the tube 46 is connected to the inspection lever 42.
Is fixed to the base 23 in the vicinity of. The operating means according to the first embodiment includes an inspection wire 41, a return spring 45, and a tube 46.

FIG. 3 is a front view showing a main part of FIG. 2, and FIG. 4 is a front view showing a state where the inspection lever 42 of FIG. 3 is swung to an inspection position. In FIG. 3, the inspection lever 42 is at the standby position and is separated from the roller 44. When the inspection wire 41 is pulled rightward in the drawing from the state shown in FIG. 3, the inspection lever 42 swings to the inspection position against the return spring 45, and the roller 44 is pressed by the inspection lever 42. As a result, the fly weight 25 is rotated about the pin 24, and the latch portion 29 is engaged with the teeth of the ratchet 30.

Next, the operation will be described. When inspecting the operation of the governor 9 and the safety gear 7, the landing door 14
Is opened, the base end of the inspection wire 41 at the lower part of the threshold is taken out to the landing side, and the base end of the inspection wire 41 is connected to the tube 46.
Pull out against. As a result, on the governor 9 side, the inspection lever 42 is swung clockwise in the figure against the return spring 45, and the roller 44 is pressed by the inspection lever 42. Then, the fly weight 25 is rotated about the pin 24, and the latch portion 29 is engaged with the teeth of the ratchet 30.

When the inspection lever 42 and the roller 44 are not in a positional relationship facing each other, first, the inspection lever 4
After moving 2 to the inspection position, the sheave 21 is rotated counterclockwise. Thus, the roller 44 that rotates integrally with the sheave 21 is pressed against the inspection lever 42 at the inspection position.

In this state, by lowering the car 4, the ratchet 30 is slightly rotated together with the sheave 21 and the connection lever 34 is displaced to the left in FIG. Thereby, the shoe 32 abuts on the governor rope 11, and the shoe 32 is pressed against the governor rope 11 by the rope gripping spring 36, and the governor rope 11 is braked. When the circulation of the governor rope 11 is stopped, the car 4 continues to descend, the lever 12 is operated, and the safety gear 7 operates. In this way, the operations of the governor 9 and the safety gear 7 are confirmed.

After the completion of the inspection, the inspection wire 41
Is stopped, the inspection lever 42 is separated from the roller 44, the fly weight 25 rotates, and the latch portion 29 is disengaged from the teeth of the ratchet 30. The ratchet 30 is urged by a return spring (not shown) to rotate clockwise in FIG. 2, and the spring force of the return spring automatically rotates the ratchet 30 to a state before operation. Thereby, the arm 31 is returned to the original state, and the shoe 32 is separated from the governor rope 11.

Thereafter, by slightly raising the car 4, the operated safety device 7 can be returned to the state before the operation. This is because an emergency stop device 7 of a type whose operation is released by raising the car 4 is used.

According to such a speed governor, even when the speed governor 9 is arranged in the hoistway 1, the worker can move the hoistway 1
Inspection work on the governor 9 can be easily performed from a remote place without having to enter the inside or provide an opening in the landing wall to access the governor 9, thereby improving the workability of the inspection work. Can be done.

In the first embodiment, the inspection wire 4
Since the inspection lever 42 is remotely operated according to 1, the structure is simple and the inspection lever 42 can be moved more reliably.

Furthermore, in the first embodiment, the shoe 32 is automatically opened from the speed governor rope 11 by simply returning the inspection lever 42 to its original position, and the car 4 is raised. Emergency stop device 7 that releases braking only
, The restoration work after inspection is easy.

Embodiment 2 Next, FIG. 5 is a front view showing an elevator landing according to a second embodiment of the present invention.
Is a cross-sectional view taken along the line VI-VI in FIG. 5, and FIG. 7 is a cross-sectional view showing an operation state of the inspection wire in FIG. In this example,
The base end of the inspection wire 41 on the landing 13 side is housed in the landing position indicator 47. Illustration of the internal structure of the landing position indicator 47 is omitted.

The landing position indicator 47 includes a case 48 accommodating a display body (not shown), and a front cover 50 connected to the case 48 via a plurality of links 49 so as to be openable and closable.
And The base end of the inspection wire 41 is housed in the case 48, and by opening the front cover 50,
It can be pulled out to the landing 13 side. The other part is
The configuration is the same as that of the first embodiment.

When operating the inspection wire 41, an operation fitting 51 is attached to the inspection wire 41 and the base end of the tube 46. When inspecting the governor 9, the front cover 50 of the landing position indicator 47 is opened, and the operation fitting 51 is attached to the inspection wire 41 and the base end of the tube 46. Then, the base end of the inspection wire 41 is pulled out from the tube 46.

In the second embodiment, the inspection wire 41
Is housed in the landing position indicator 47 and can be easily pulled out from the landing 13 side, so that the inspection wire 41 can be operated without opening the landing door 14, further improving the workability of the inspection work. Can be improved.

In the second embodiment, the inspection wire 4
Although the base end portion 1 is housed in the hall position indicator 47, it may be housed in a hall push button device (not shown).

Embodiment 3 Next, FIG. 8 is a plan view showing a main part of an elevator governor according to Embodiment 3 of the present invention, and FIG. 9 is a plan view showing an operation state of the inspection wire of FIG. In the second embodiment, the base end of the inspection wire 41 is housed in the hall position indicator 47. In the third embodiment, the base end of the inspection wire 41 is located behind the wall 15 of the hall 13. Are located.

When the inspection wire 41 is operated, the operation metal fitting 53 is inserted through a gap between the landing door 13 and the three-way frame 52, and the operation metal fitting 53 is engaged with the inspection wire 41.
Other parts are configured in the same manner as in the first embodiment.

As described above, even when the base end of the inspection wire 41 is arranged on the back side of the wall 15, the inspection wire 41 can be easily operated with the landing door 14 closed.

Embodiment 4 FIG. In the first to third embodiments, the inspection lever 42 is swung via the inspection wire 41. However, as shown in FIG. 10, for example, an electromagnetic actuator 54 is connected to the inspection lever 42, The wiring 55 for operating the actuator 54 may be extended to the landing 13 for remote control. Further, the actuator 54 may be remotely controlled by radio.

In the first to fourth embodiments, the inspection lever 42 that swings and rotates the fly weight 25 is shown. However, the inspection lever 42 may be displaced linearly. .

Further, in the first to fourth embodiments, the hoistway 1
Although the case where the governor 9 is arranged in the upper part of the inside has been described, the present invention can also be applied to, for example, the case where the governor is installed in the pit, and the worker can perform inspection without descending to the pit. Work can be easily performed from the landing side.

[0054]

As described above, the elevator governor according to the first aspect of the present invention displaces between the standby position and the inspection position where the fly weight is rotated to engage the latch portion with the ratchet. A possible inspection lever is provided and the inspection lever is remotely operated and displaced by operating means, so that inspection work can be easily performed from the landing side even when the governor is located in the hoistway. Can be performed, and the workability of the inspection work can be improved.

According to a second aspect of the present invention, there is provided an elevator governor,
Since the flyweight is provided with a roller to be brought into contact with the inspection lever, the flyweight can be smoothly rotated by the displacement of the inspection lever.

According to a third aspect of the present invention, there is provided an elevator governor,
Since the operating means having the return spring for urging the inspection lever to the normal position and the inspection wire having the tip connected to the inspection lever is used, the structure is simple and the inspection lever can be moved more easily. It can be moved reliably.

According to a fourth aspect of the present invention, there is provided an elevator governor,
The base end of the inspection wire is stored in the landing position indicator and can be pulled out to the landing side, so that the inspection wire can be operated without opening the landing door, further improving the workability of the inspection work. Can be.

According to a fifth aspect of the present invention, there is provided an elevator governor,
Since the base end of the inspection wire is located behind the wall of the hall and can be operated through the gap between the hall door and the three-way frame, the inspection wire can be operated without opening the hall door,
The workability of the inspection work can be further improved.

According to a sixth aspect of the present invention, there is provided an elevator governor,
Since the operating means having the electromagnetic actuator for displacing the inspection lever connected to the inspection lever is used, the structure is simple and the inspection lever can be moved more reliably.

According to a seventh aspect of the present invention, there is provided an elevator governor,
By returning the inspection lever from the inspection position to the standby position, the ratchet is automatically restored to the position before operation, and the braking of the governor rope by the shoe is automatically released, so the inspection The workability of the restoration work after completion can also be improved.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an elevator according to a first embodiment of the present invention.

FIG. 2 is a front view showing the governor of FIG. 1;

FIG. 3 is a front view showing a main part of FIG. 2;

FIG. 4 is a front view showing a state in which the inspection lever of FIG. 3 is swung to an inspection position.

FIG. 5 is a front view showing an elevator landing according to a second embodiment of the present invention.

FIG. 6 is a sectional view taken along the line VI-VI in FIG. 5;

FIG. 7 is a sectional view showing an operation state of the inspection wire of FIG. 6;

FIG. 8 is a plan view showing a main part of a governor according to Embodiment 3 of the present invention.

FIG. 9 is a plan view showing an operation state of the inspection wire of FIG. 8;

FIG. 10 is a front view showing a governor according to a fourth embodiment of the present invention.

FIG. 11 is a configuration diagram illustrating an example of a conventional elevator.

FIG. 12 is a front view showing an example of a conventional governor.

[Explanation of symbols]

1 hoistway, 4 cars, 7 emergency stop device, 9 governor, 11 governor rope, 13 landing, 14 landing door, 21 sheave, 22 sheave axle, 23 base, 25 fly weight, 27 balancing spring , 29 Latch, 30
Ratchet, 32 shoes, 41 Inspection wire, 42
Inspection lever, 44 roller, 45 return spring, 47
Landing position indicator, 52 three-way frame, 54 actuator.

Claims (7)

[Claims] 1. A base installed in a hoistway, and a governor rope rotatably supported on the base and operating an emergency stop device is wound thereon, according to the elevator speed of the car. A sheave that rotates by rotating the sheave, a flyweight that is rotatably attached to the sheave, and that is rotated by centrifugal force due to the rotation of the sheave, and a balance that urges the flyweight in a direction against the centrifugal force. A spring, a ratchet provided rotatably about the sheave shaft of the sheave, and a ratchet provided on the flyweight, and engaged with the ratchet when the lowering speed of the car reaches a preset overspeed. A latch unit for rotating the ratchet in the same direction as the sheave; a shoe for braking the governor rope when the ratchet rotates; a standby position; and rotating the flyweight. An elevator speed control, comprising: an inspection lever displaceable between an inspection position at which the latch portion is engaged with the ratchet, and operation means for remotely displacing the inspection lever. Machine. 2. The elevator governor according to claim 1, wherein the flyweight is provided with a roller with which an inspection lever abuts. 3. The operating means has a return spring for urging the inspection lever to a normal position, and an inspection wire having a distal end connected to the inspection lever. The elevator governor according to claim 1 or 2. 4. The elevator governor according to claim 3, wherein the base end of the inspection wire is housed in a landing position indicator and can be pulled out to the landing side. 5. The inspection wire according to claim 3, wherein the base end of the inspection wire is disposed behind the wall of the hall and is operable through a gap between the hall door and the three-sided frame. The elevator governor described. 6. The elevator control according to claim 1, wherein the operating means includes an electromagnetic actuator connected to the inspection lever and displacing the inspection lever. Speed machine. 7. Returning the inspection lever from the inspection position to the standby position automatically restores the ratchet to its pre-operation position, thereby automatically releasing braking of the governor rope by the shoe. The elevator governor according to any one of claims 1 to 6, wherein: