JP2002096982A - Elevator device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an elevator device capable of easily installing a cage equipped with a speed regulating mechanism in an elevator shaft having a small cross-sectional plane area, and certainly driving the speed regulating mechanism. SOLUTION: The car 3 is suspended by wrapping main rope 4 on a sheave 16 journalled to the car 3, and an emergency stopping device 6 acting for braking a descent of the car 3 when necessary is provided on the cage 3. The speed regulating mechanism acting when the rotating speed of the sheave 16 exceeds a specified value is provided on the car 3, and a transmitting means 42 actuated through the action of the speed regulating mechanism so as to make the emergency stopping device 6 act is provided. Therefore, the speed regulating mechanism is rotated with the sheave 16 rotated by the main rope 4, so that overspeed elevating can be precisely detected. The car 3 equipped with the speed regulating mechanism can be easily installed even in the elevator shaft having a small cross-sectional area.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator apparatus in which an emergency stop device operates by operating a speed control mechanism when a descending speed of an ascending / descending car exceeds a predetermined value.

[0002]

2. Description of the Related Art FIG.
FIG. 3 is a front view conceptually showing a main portion of a hoistway of the elevator, showing the conventional elevator apparatus shown in FIG. 3. In the figure, 1 is a hoistway, 2 is a guide rail erected in parallel with the hoistway 1 at a distance from each other, 3 is a car suspended between the guide rails 2 by a main rope 4 and 5 A guide tool 6 mounted on the car 3 and engaged with the guide rail 2 so as to be able to move up and down. An emergency stop 6 is provided at the lower part of the car 3 and operates when necessary to clamp the guide rail 2 and brake the lowering of the car 3. The device 7 is a speed control mechanism provided on the upper part of the car 3 and is provided with a speed control vehicle 8 whose detailed description of the configuration is omitted.

A speed control rope 9 has an upper end connected to the top of the hoistway 1, descends and is wound around the speed governor 8, and a lower end connected to a tension device 10 provided on the bottom surface of the hoistway 1. .
Numeral 11 denotes a reel pivoted on the governor 8 and connected to the governor 8 by the function of the governor 7 which operates when the rotational speed of the governor 8 exceeds a predetermined value. It rotates with the car 8. Reference numeral 12 denotes a transmission means composed of an operation rope, one end of which is connected to the reel 11 and descends, and the other end is connected to the safety device 6.

[0004] The conventional elevator apparatus is configured as described above, the main ropes 4 are driven by a driving machine (not shown), and the car 3 is guided by the guide rails 2 to move up and down the hoistway 1. When the elevator speed of the car 3 is lower than the predetermined value, the speed control mechanism 7 does not operate, and the reel 11 remains stationary regardless of the rotation of the speed control vehicle 8.

When the speed of raising and lowering the car 3 exceeds a predetermined value, that is, when the speed of the car 3 becomes excessive, the speed control mechanism 7 operates, and the reel 11 rotates together with the speed control wheel 8. This reel 11
The transmission means 12 is wound up by the rotation of, the emergency stop device 6 is operated, and abnormal lowering of the car 3 due to overspeed is braked.

[0006]

In the conventional elevator apparatus as described above, the speed control car 8 of the speed control mechanism 7 is driven via the speed control rope 9 by the elevation of the car 3. For this reason, a space for suspending the speed control rope 9 is required on the horizontal projection plane of the hoistway 1, increasing the area of the cross-sectional plane of the hoistway 1, increasing the construction cost of the hoistway 1, and increasing the elevator There is a problem that the space efficiency of the building to be installed is low.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and a car equipped with a speed control mechanism can be easily installed on a hoistway having a narrow cross-sectional area, and the speed control mechanism can be reliably driven. The purpose is to obtain a lift device to be used.

[0008]

SUMMARY OF THE INVENTION In an elevator apparatus according to the present invention, a sheave on which a main rope for hanging a car which is pivotally attached to a car is wound, and which is provided on the car and operates when necessary. An emergency stop device for braking the descent of the car, a speed control mechanism provided on the sheave and operating when the rotation speed of the sheave exceeds a predetermined value, and an emergency stop device operated through the operation of the speed control mechanism Transmission means for operating the stop device.

In the elevator apparatus according to the present invention, a sheave is mounted and a mounting girder is provided on a car via a lower urging member, and the lower urging member is provided when the tension of the main rope is lost. A transmission means for operating the safety device via the downward displacement of the sheave due to the transmission is provided.

Further, in the elevator apparatus according to the present invention, a speed control mechanism is provided, and a speed control rotating plate which is detachably fastened to the sheave by a fastener is provided.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 1 to 6 are views showing an example of an embodiment of the present invention. FIG. 1 is an elevation view conceptually showing an elevator apparatus, FIG. 2 is an enlarged view of the car of FIG. 1, and FIG. 4, FIG. 4 is an enlarged vertical sectional view of the sheave portion of FIG. 2, FIG. 5 is a side view of a main part of FIG. 4 showing a speed control mechanism provided on the sheave of FIG. 4, and FIG. FIG. 4 is a diagram illustrating an operation state of a speed control mechanism. In the figure, reference numeral 1 denotes a hoistway, and 2 denotes guide rails which are erected on the hoistway 1 in parallel with each other.

Reference numeral 3 denotes a car arranged between the guide rails 2; 5 denotes a guide mounted on the car 3 and engaged with the guide rail 2 so as to be able to move up and down; An emergency stop device 13 that operates and clamps the guide rail 2 to brake the lowering of the car 3 is a lower urging member, which is formed by a compression coil spring and protrudes below the car 3. Reference numeral 14 denotes a mounting girder mounted on the lower end of the lower urging body 13.

Reference numeral 15 denotes a blocking member, which is provided at a lower portion of the car 3 so as to protrude therefrom, and has a lower end arranged to face the upper surface of the mounting girder 14 to prevent the lower urging member 13 from being excessively compressed. Reference numeral 16 denotes a sheave pivotally attached to both ends of the mounting girder 14, respectively, and 17, a balance weight for elevating and lowering a predetermined path of the hoistway 1.
Is provided. Reference numeral 19 denotes a machine room provided above the hoistway 1, in which a hoisting machine 20 and a deflector 21 are installed.

Reference numeral 4 denotes a main rope, one end of which is connected to the top of the hoistway 1 and is wound around the sheave 16 of the descending car 3 to ascend, and is wound around the hoisting machine 20 and the deflector wheel 21 to descend. The other end of the hoistway 1 is connected to the top of the hoistway 1 while being lifted around the lifting wheel 18 of the counterweight 17. 22 is the mounting girder 14
And a bracket protruding downward from and supporting the shaft 23 pivotally supporting the sheave 16.

Reference numeral 24 denotes a speed control mechanism provided on the sheave 16.
A shaft pin 25 erected on the sheave 16 and arranged at symmetrical positions with respect to the shaft 23, a weight piece 26 having one side pivotally supported by the shaft pin 25, and a counter-clockwise direction from the pivot end of the weight piece 26. An extended arm 27, one end of which is pivotally supported by a rotating end of one arm 27, the other end of which is a connecting rod 28 which is pivotally supported by the center of the other weight piece 26, and one end of which is the other arm 27. A support rod 30 is pivotally supported at the other end of the support rod 30 and has the other end erected on the sheave 16 and inserted into the support plate 29 with a gap formed therebetween.

In the speed control mechanism 24, a nut 31 screwed into the insertion end of the support plate 29 of the support rod 30 is fitted between the support rod 30 and disposed between the arm 27 and the support plate 29. A speed adjusting spring 32 composed of a compression coil spring; a claw piece 35 having a claw 34 formed at one end thereof; Are the anti-claw 34 of the weight piece 26 and the claw piece 35, respectively.
A link 36 is provided which is pivoted on the side.

Reference numeral 37 denotes a ratchet wheel pivotally mounted on the shaft 23 and provided with teeth 38 corresponding to the claws 34; 39, a reel pivotally connected to the shaft 23 and connected to the ratchet wheel 37; One end is connected to the reel 39, is pivotally connected to the car 3, is wound around a pulley 41 disposed above the safety device 6, and the other end is connected to the safety device 6. Reference numeral 42 denotes a transmission means formed by the ratchet 37, the reel 39, the operating rope 40, and the pulley 41.

In the elevator apparatus constructed as described above, the lower urging member 13 is compressed by the mounting girder 14 by the weight of the car 3 in the normal state, and the mounting girder 14 is supported by the car 3 by the blocking body 15, The mounting girder 14 is arranged at a predetermined position with respect to the car 3. Then, the main rope 4 is driven by the hoisting machine 20, and the car 3 is guided by the guide rail 2 to move up and down the hoistway 1.

The sheave 16 is driven by the main rope 4 to be driven.
Rotates, the governing mechanism 24 also rotates with this rotation, and the weight piece 26 revolves around the shaft 23. In addition, the weight piece 26 is rotated by the centrifugal force generated by the rotation of the
5 is urged in a direction away from the shaft 23.

In this state, if the elevator speed of the car 3 is lower than the predetermined value, the support rod is urged in a direction in which the arm 27 of the weight piece 26 is separated from the shaft 23 by the speed adjusting spring 32. It is held in place by 30.
For this reason, the weight piece 26 does not rotate and displace about the shaft pin 25 in the direction away from the shaft 23 due to the centrifugal force. When the weight piece 26 does not rotate in the direction away from the shaft 23, the claw 34 of the claw piece 35 is held at a position away from the teeth 38 of the ratchet wheel 37 as shown in FIG.

As a result, the ratchet wheel 37 and the reel 39 do not rotate, and the reel 39 and the like are kept stationary. When the lowering speed of the car 3 exceeds a predetermined value, the weight piece 26 rotates around the shaft pin 25 by centrifugal force acting on the weight piece 26, and the arm 27 of the weight piece 26 is moved by the speed adjusting spring 32. It is displaced in a direction approaching the shaft 23 against the urging force. For this reason, the claw piece 35 rotates clockwise in FIG. 5 via the link 36, and the claw 34 engages with the teeth 38 of the ratchet 37. As a result, the ratchet wheel 37 is moved to the sheave 16
The reel 39 also rotates together with the sheave 16.

Since the weight pieces 26 on both sides are connected to each other by the connecting rod 28, when the lowering speed of the car 3 exceeds a predetermined value, the weight pieces 26 on both sides synchronously retreat from the shaft 23. Rotate in the direction. Then, the operation rope 40 is wound up by the rotation of the reel 39. For this reason, the emergency stop device 6 to which the operating rope 40 is connected is operated, and the lowering of the car 3 is braked, and the abnormal lowering of the car 3 due to overspeed is braked.

The sheave 16 on which the weight of the car 3 acts.
The car 3 is suspended by a main rope 4 wound around the
Is driven to rotate the sheave 16. For this reason, slippage occurring between the main rope 4 and the sheave 16 is small, and the speed control mechanism 24 detects the overspeed rise and fall of the car 3 with high accuracy. Then, the emergency stop device 6 operates reliably when the car 3 abnormally lowers via the operation of the transmission means 42, so that an accident caused by abnormal lowering can be prevented beforehand.

When the sheave 16 is driven by the main rope 4, the speed control mechanism 24 is also driven.
Are also used as driving means of the speed control mechanism 24. Therefore, on the horizontal projection plane of the hoistway 1, the space for suspending the speed control rope 9 in FIG. Can be installed in Thereby, the construction cost of the hoistway 1 can be reduced, and the space efficiency of the building in which the elevator is installed can be improved.

When the tension of the main rope 4 is lost due to breakage, relaxation, or the like, the mounting girder 14 urged downward by the compressed lower urging body 13 suddenly descends with respect to the car 3. I do. As a result, the sheave 16 descends and the operation rope 40 connected to the sheave 16 is pulled down by the function of the transmission means 42, that is, the safety gear 6 connected to the operation rope 40 operates. Therefore, the lowering of the car 3 is braked, and the abnormal lowering of the car 3 due to the overspeed is braked.
In this way, even when the tension of the main rope 4 is lost, the car 3
Accidents caused by abnormal lowering of the vehicle can be prevented beforehand.

Embodiment 2 FIG. FIG. 7 is a view showing an example of another embodiment of the present invention, and is equivalent to FIG. 4 described above.
The elevator apparatus is configured in the same manner as in FIGS. 1 to 6 except for FIG. In the drawings, the same reference numerals as those in FIGS. 1 to 6 denote corresponding parts, and 43 is a speed control rotating plate, which is provided with the above-described speed control mechanism 24 and is arranged concentrically with the sheave 16 and has a side surface of the sheave 16. Are fastened by fasteners 44 made of bolts.

Also in the elevator apparatus constructed as described above, the car 3 is suspended by the main rope 4 wound around the sheave 16 and the main rope 4 is driven to rotate the sheave 16. Further, a sheave 16 is pivotally mounted on a mounting girder 14 mounted on the car 3 via a lower urging body 13. Therefore, although detailed description is omitted, FIGS.
The same operation as the embodiment of FIG. 6 can be obtained.

In the embodiment shown in FIG. 7, the speed control rotating plate 43 equipped with the speed control mechanism 24 is fastened to the side surface of the sheave 16 by fasteners 44. Therefore, when the rope groove of the sheave 16 is worn, the sheave 16 can be easily replaced by removing the governing rotary plate 43 by the fastener 44.
For this reason, maintenance work efficiency can be improved.

Embodiment 3 8 to 10 also show an example of another embodiment of the present invention. FIG. 8 is a front view of a car of an elevator, which corresponds to FIG. 2 described above, and FIG.
FIG. 10 is a longitudinal sectional side view of the sheave portion shown in FIG. Except for FIGS. 8 to 10, the elevator apparatus is configured similarly to the above-described FIGS. 1 to 6. In the figure, the same reference numerals as those in FIGS.

45 is an upper beam forming the upper part of the car 3;
Is a mounting girder provided below the upper beam 45 via the lower urging body 13 and the blocking body 15, and a sheave 16 is provided below. 47 is an upper beam pulley pivotally mounted on the upper side of the upper beam 45;
Is an operation rope for a mounting girder, one end of which is connected to the mounting girder 46, is wound around an upper beam pulley 47 and descends, and the other end is connected to the safety device 6. Reference numeral 49 denotes a transmission means constituted by the upper beam pulley 47 and the attachment girder operating rope 48.

Also in the elevator apparatus constructed as described above, the car 3 is suspended by the main rope 4 wound around the sheave 16 and the main rope 4 is driven to rotate the sheave 16. Further, the sheave 16 is pivotally mounted on a mounting girder 46 provided below the upper beam 45 of the car 3 via the lower urging body 13,
When the tension of the main rope 4 is lost, the attachment girder 46 rapidly descends, and the safety device 6 operates by the function of the transmission means 49. Therefore, although detailed description is omitted, the same operation as the embodiment of FIGS. 1 to 6 can be obtained in the embodiment of FIGS.

[0032]

According to the present invention, as described above, a sheave on which a main rope which is pivotally attached to a car and suspends the car is wound;
An emergency stop device provided on the car and operating when necessary to brake the lowering of the car; a speed control mechanism provided on the sheave and operating when the rotation speed of the sheave exceeds a predetermined value; Transmission means for operating the safety device by operating through the operation of the mechanism.

Since the sheave, on which the weight of the car acts, is rotated by the operation of the main rope wound around the sheave, slippage occurring between the main rope and the sheave is small, and the car is overspeeded with high accuracy. Is detected by the governing mechanism. Then, when the car abnormally lowers, the emergency stop device operates reliably via the operation of the transmission means, and an accident due to the abnormal lowering is prevented beforehand. Further, since the speed control mechanism is driven by the rotation of the sheave, the main rope is also used as a driving means of the speed control mechanism. Therefore, a hanging space such as a dedicated rope for driving the speed control mechanism is not required on the horizontal projection plane of the hoistway, and a car equipped with the speed control mechanism can be easily installed on the hoistway having a narrow cross-sectional area.
Thereby, the construction cost of the hoistway can be reduced, and the space efficiency of the building in which the elevator is installed is improved.

Further, as described above, according to the present invention, the sheave is mounted, the mounting girder is provided on the car via the lower urging member, and the lower urging member is provided when the tension of the main rope is lost. Transmission means for operating the safety device via the downward displacement of the sheave caused by the pulley.

Thus, when the tension of the main rope is lost due to breakage, loosening, or the like, the mounting girder urged downward by the compressed lower urging member suddenly descends. As a result, the sheave descends and the safety device operates via the function of the transmission means. The lowering of the car is braked by the operation of the safety device, and the abnormal lowering of the car due to overspeed is braked.
For this reason, there is an effect of preventing an accident caused by abnormal lowering of the car when the tension of the main rope is lost.

Further, as described above, the present invention is provided with a speed control rotating plate provided with a speed control mechanism and removably fastened to a sheave by fasteners.

Thus, when the rope groove of the sheave is worn out, the governor can be easily replaced by removing the governor plate by the fastener, thereby improving the maintenance work efficiency.

[Brief description of the drawings]

FIG. 1 is a view showing a first embodiment of the present invention, and is an elevational view conceptually showing an elevator apparatus.

FIG. 2 is an enlarged view of the car of FIG.

FIG. 3 is a bottom view of FIG. 2;

FIG. 4 is an enlarged vertical sectional view of a sheave portion shown in FIG. 2;

FIG. 5 is a diagram showing a governing mechanism provided in the sheave of FIG. 4;
FIG.

FIG. 6 is a diagram showing an operation state of the speed control mechanism of FIG. 5;

FIG. 7 is a diagram corresponding to FIG. 4, showing a second embodiment of the present invention;

FIG. 8 is a view showing a third embodiment of the present invention, and is a front view of a car of an elevator and is a view corresponding to FIG. 2;

FIG. 9 is a plan view of FIG. 8;

10 is a longitudinal sectional side view of the sheave portion of FIG. 9, and is a view corresponding to FIG.

FIG. 11 is a view showing a conventional elevator apparatus, and is a front view conceptually showing a main portion of a hoistway of an elevator.

[Explanation of symbols]

3 basket, 4 main ropes, 6 emergency stop device, 13 downward biasing body, 14 mounting girder, 16 sheave, 24 governor, 4
2 Transmission means, 43 Governing rotary plate, 44 Fastener, 46
Mounting girder, 49 Transmission means.

Claims (3)

[Claims] 1. A sheave on which a main rope which is pivotally attached to a car and suspends the car is wound, and an emergency stop device which is provided on the car and operates when necessary to brake the lowering of the car. A speed control mechanism provided on the sheave and operating when the rotation speed of the sheave exceeds a predetermined value; and transmission means for operating the emergency stop device by operating through the operation of the speed control mechanism. And an elevator device comprising: 2. The vehicle according to claim 1, further comprising a mounting girder mounted on the car through a lower urging member and having a sheave mounted thereon, wherein a transmission means is provided below the sheave by the lower urging member when the tension of the main rope is lost. The elevator apparatus according to claim 1, wherein the safety device is operated via the displacement. 3. A speed control rotating plate provided with a speed control mechanism and detachably fastened to a sheave by fasteners. Elevator equipment.