JP3397676B2 - Elevator governor - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a governor for an elevator. 2. Description of the Related Art FIG. 5 is a perspective view showing an example of a rope traction type elevator incorporating a conventional elevator governor. In FIG. 5, at the top of the hoistway 40,
A machine beam 47 is fixed laterally to a building (not shown). The machine beam 47 is provided with a hoist 41, a control panel 46, and the like. [0003] Among them, a motor 42 is incorporated in the hoisting machine 41, and an output shaft of the motor 42 has a speed reducer and a brake.
The hoisting sheave 43 is attached to the output shaft of the speed reducer. A main rope 50 is wound around the hoisting sheave 43, and a car frame 61 is suspended at a lower end on the right side of the main rope 50 in FIG. 5, and a car 52 is housed in the car frame 61. ing. [0004] The left side of the main rope 50 hangs down the hoistway 40 via a deflecting sheave 48, and a counterweight 51 is suspended at the lower end. The counterweight 51 is a pair of counters vertically mounted on the hoistway 40. It is guided on a rail 54. Similarly, a pair of guide rails 45 are vertically provided in the hoistway 40, and a car frame 61 which moves up and down the hoistway 40 is mounted on the upper and lower sides of the car frame 61 and pressed by the guide rails 45 to roll. It is guided by a moving guide roller (not shown). An end of the tail cord 62 hanging from the control panel 46 to the hoistway 40 is connected to a connection box 49 provided at the lower end of the car frame 61.
Are connected to an electric motor (not shown) on the upper part of the car 52, push buttons and indicators inside the car 52, and the like. Note that an oil-filled buffer 57 is provided upright in the pit 55 at the lower end of the hoistway 40. [0007] In front of the deflector sheave 48, a governor 1B is erected on the floor of the machine room, and the lower end of the governor main rope 10 wound around the sheave of the governor 1B is a hoistway. It is wrapped around a governor rope upholstery standing at 40 pits 55. On both sides of the lower end of the car frame 61, emergency stops 56, which are not shown in detail, are provided vertically. The head of the guide rail 45 is loosely fitted between a pair of wedges (not shown) incorporated in these emergency stops 56. are doing. FIG. 6 is an enlarged detailed view of the governor 1B shown in FIG. 5, FIG. 7 is an enlarged sectional view taken along line GG of FIG. 6, and FIG.
It is a -H sectional enlarged view. 6, 7, and 8,
The speed governor 1B is assembled with a sheave, a rope catch, a spindle shaft, and the like using a lower frame 2 and a vertical frame 3B erected on the lower frame 2 as a main frame. The lower frame 2 is composed of a pair of lower beams 2c made of a channel steel, and a base plate made of a thick mild steel plate mounted on the upper surface of the lower beams 2c and fixed to the lower beams 2c. 2b, and the upper surface of the base plate 2b is smoothed. A vertical beam 3B made of a channel steel, which is provided upright on the rear side of the central portion of the base plate 2b with the groove portion on the front side, is attached to the base plate 2b via a rectangular mounting seat 3a welded to the lower end. It is fixed with bolts. A bearing 7C made of a thick mild steel plate is welded to the upper end of the vertical beam 3B. A sheave shaft 4B is inserted from the rear into the center of the bearing 7C, and a cantilever beam is formed forward. Sticking out. A bearing 6C is provided above the bearing portion 7C.
Is inserted. A bevel gear 67A is inserted into the middle portion of the sheave shaft 4B via an annular slide bearing from the front, and a pair of angular bearings is press-fitted in front of the bevel gear 67A and the slide bearing. A sliding bearing is also inserted in front of the angular bearing, and a bearing nut is screwed further forward of the sliding bearing. The sheave shaft 4B is tightened by the bearing nut and fixed to the bearing portion 7C. ing. The bearing portion of the sheave 9B is inserted into the outer periphery of the angular bearing from the front, and the rear end of the bearing hole of the sheave 9B is fitted to a fitting portion formed at the front end of the bevel gear 67A. A bearing cover is provided in front of the bearing hole of the sheave 9B.
A sheave 9B is rotatably supported on the sheave shaft 4B by a plurality of bolts, which are inserted through mounting holes formed on the outer periphery of the bearing cover 68 and whose tips are screwed to the front surface of the bevel gear 67A. Have been. The lower end of the spindle shaft 69 is press-fitted into the bearing 6C inserted above the bearing portion 7C. A bevel gear 67B is press-fitted from below into the lower portion of the spindle shaft 69, and the inner ring of the bevel gear 67B is fixed by a bearing nut also screwed from below, and the front teeth of the bevel gear 67B are , And meshes with the teeth at the rear upper end of the bevel gear 67A. A bearing box 70 having a U-shaped vertical section is loosely fitted to the upper part of a bevel gear 67B via a collar 71 on the spindle shaft 69. Inside the bearing box 70, a pair of angular bearings is provided. The inner ring is press-fitted into the shaft 69, is inserted into the spindle shaft 69 from above, and is screwed into the bearing nut to fix the inner ring. On the front surface of the bearing housing 70 and the front surface of the longitudinal beam 3B, the upper and lower sides of a support frame 72 formed of a mild steel plate and having a convex shape in FIG. 7 are fixed with bolts. The outer periphery of the rear end is inserted into a large-diameter hole formed in the center of the support frame 72. A spring receiver 73 having an inverted U-shaped vertical section is inserted into the spindle shaft 69 at the upper part of the bearing housing 70.
The bearing 73a is press-fitted from below into the outer periphery of the lower part of the bearing. On the outside of the lower part of the spring receiver 73, a swing link is provided.
The intermediate part of 74A is supported via a pin, and this swing link
The upper end of the short link 74B is connected to the right end in FIG. 6 of the 74A via a pin, and the lower end of the link 74B is connected to the upper right side of the bearing 7C via a pin. The left end of the oscillating link 74A is connected via a pin to an upper part of a U-shaped link joint 74C in the side view of FIG. 6, and a lower part of the link joint 74C is connected to a connecting rod 74D.
Are screwed together and fixed with nuts. The lower end of the connecting rod 74D is screwed with the upper end of a turnbuckle 74E.
An upper end of a long connecting rod 74F is screwed into a lower end of the connecting rod, and each is fixed with a nut. A coil spring 16B loosely fitted on the spindle shaft 69 is inserted into a counterbore portion at the upper end of the spring receiver 73, and a spring retainer 37 is mounted on the upper end of the coil spring 16B.
The spring retainer 37 is pushed from above by a nut screwed onto the spindle 69 from above, and is
16B is compressed. A pair of supports 31 are fixed to the milling surfaces formed on both sides of the upper end of the spindle shaft 69 by bolts via spacers inserted on the lower side. Is pressed against the stepped portion of the spindle shaft 69 by a double nut or the like screwed into the nut. At both ends of the support 31, an upper end of the arm 32 is provided with a pin 31a.
The upper end of a link 33 is connected to an intermediate portion of the arm 32, and the lower end of the link 33 is connected to both sides of an upper portion of a spring receiver 73. At the lower end of arm 32, pendulum 8
B is fixed. A limit switch 18B is fixed to the left end of the base plate 2b via a mounting plate, and a fixed catch 19e is vertically provided on the right side of the limit switch 18B. A support 14E is erected in front of the fixed catch 19e, and a base of the lever 34 and the cams 17B, 17C, 17D is fixed to a shaft 22C penetrating the upper end of the support 14E. The lower end of the rod 74F is connected to the end of the lever 34 via a link joint and a pin. A large support 14 is provided on the upper surface on the right side of the base plate 2b.
D is erected, and the shaft 22D penetrated by this support 14D has
The right end of the spring shaft of the rope catch 19B is inserted, and a double nut is screwed into the right end of the spring shaft. A coil spring 16C is inserted into the spring shaft of the rope catch 19B. Clevis on left end of spring shaft
A movable shoe is connected to 19f via a pin, and the movable shoe is opposed to the shoe of the above-mentioned fixed catch 19e via the governor main rope 10. In the elevator governor constructed as described above, as the car moves up and down, the governor main rope 10 fixed to the car via a lever runs through the upper and lower sheaves.
Run . The sheave 9B rotates as the governor main rope 10 runs , and this rotation is transmitted to the spindle shaft 69 via bevel gears 67A and 67B. When the car descends beyond the specified speed, the pair of pendulums 8B expand outward by centrifugal force as shown by arrows in FIG.
31 also expands, link 33 also coil spring with spring receiver 73
16B is compressed and rises. Then, the swing link 74A swings clockwise about the fulcrum, and the connecting lot 74D and the turnbuckle 74 are rotated.
E, When the connected lot 74F moves up and down, the lever 34 swings counterclockwise. Therefore, each cam 17B. 17C and 17D also swing counterclockwise, of which the limit switch 18B is actuated by the cam 17B, the contactor on the power supply side of the electric motor of the hoist is opened, and the cam 17D which swings by the cam 17C. The tip of the rope catch 19B is lowered, and the rope catch 19B grasps the governor main rope 10 between itself and the fixed catch. Then, the emergency stop of the car is operated, and the shoe of the emergency stop bites between the guide rail and the emergency stop, thereby stopping the car suddenly. The timing for opening the contactor on the power supply side of the electric motor of the hoist and the timing for operating the rope catch are determined by the shaft 22C and the cam 17B. This is performed by changing the mounting angle with 17C and 17D. The rated speed of this governor is bevel gear 67
This is performed by changing the gear ratio of A, 67B, or changing the spring constant and the initial set pressure of the coil spring 16B. FIG. 9 is a view showing an example of a conventional governor which is different from the elevator governor shown in FIGS.
It is disclosed in Japanese Patent Application Publication No. 64-9971. In FIG. 9, a sheave shaft 4C is provided above an L-shaped frame 23 installed in the machine room.
Is fixed, and a sliding ring 24 is slidably inserted in the sheave shaft 4C to the left and right. A sheave 9C is press-fitted into the tip of the sheave shaft 4C, and is fixed by a fixture for fixing an inner ring of a bearing 6D inserted into the center of the sheave shaft 9C. Bearings 26 with guide rollers inserted on both sides are inserted into grooves formed on the outer periphery of the sliding ring 24 inserted into the sheave shaft 4C. One side of the operating arm 27 is inserted into the shaft of these bearings 26. Are linked. The other end of the operating arm 27 is connected to the base end of a pendulum 8C via a pin. This pin is attached to the tip of an isosceles triangular support 29 fixed to the side surface of the sheave 9C. Are connected via On the right side of the frame 23, a support 23a is provided with a sheave shaft 4.
C is fixed to the lower side.
An intermediate portion of the operation rod 34 is connected via a pin, and an upper end of the operation rod 34 is connected to an end of a mounting plate 30 fixed to the slide ring 24. On the right side of the frame 23, a mounting base 35 is fixed by bolts. On the upper surface of the mounting base 35, a switch 18C for shutting off the power of the hoist is provided upright. The push button is opposed to the lower end of the operation rod 34 described above. In the elevator governor constructed as described above, when the rotation speed of the sheave 9C exceeds a prescribed value due to the excessive descending speed of the car, the pendulum 8C is moved through the pin as shown by a chain line. Swings in the outer circumferential direction, and follows this swing,
The operating rod 34 also swings in the direction of the sheave 9C as indicated by the arrow on the other side, and the sliding ring 24 moves. Then, the lower part of the operating rod 34 whose upper end is connected to the mounting plate 30 on the left side of the sliding ring 24 swings clockwise as shown by the broken line, and the lower end contacts the push button, Activate switch 18C. However, in the elevator governor shown in FIGS. 6 to 8, it takes time to adjust the contact between the pair of bevel gears during the installation adjustment. . That is, the adjustment of the tooth contact is performed by inserting a thin stainless steel plate spacer on the back side of these bevel gears,
Tooth surfaces of both bevel gears are coated with paint for tooth contact inspection, but these bevel gears must be pulled out from the shaft to insert and remove the spacer. If the adjustment of the tooth contact is insufficient,
Especially in a high-speed elevator, not only does the noise generated by the rotation of the gears increase, but also the wear of the tooth surface is promoted,
The frequency of maintenance and inspection must be increased. Further, when the shoe of the rope catch is worn, the braking force by the coil spring is reduced, so that it takes time to adjust the restoring force of the pressing force of the coil spring.
Furthermore, since the link mechanism for transmitting the position of the pendulum to the cam plate at the lower end is complicated, the time required for installation, maintenance, and inspection increases. On the other hand, in the elevator governor shown in FIG. 9, the rotation speed of the pendulum 8C is increased and the sheave shaft 4C of the operating arm 27 is moved.
When the angle of the guide rod changes, the angle of the bearing of the guide roller also changes, so as the angle of the bearing increases, the gap between both sides of the U-shaped groove fluctuates, and even at the same speed, the swing angle of the operation rod varies. There is a risk. In this case, there is a possibility that the operation timing of the switch also varies. SUMMARY OF THE INVENTION It is an object of the present invention to provide an elevator governor which has a simple structure, is easy to assemble, adjust, maintain and inspect, and can increase speed detection accuracy. According to a first aspect of the present invention, there is provided an elevator speed governor comprising: a sheave shaft having both ends inserted through a bearing at an upper end of a vertical frame; and one side of the sheave shaft. A sheave on which a governor main rope is wound around the outer periphery of the sheave shaft, and a sliding plate into which a boss portion is axially movably inserted on the other side of the sheave shaft;
A plurality of pendulum links, one of which is pivotally supported on the sliding plate and the other is pivotally supported on the other side, and the pendulum link is pivotally supported on one side at the intermediate portion of the pendulum link and the other side is pivotally supported by the sheave. With
A plurality of sheave links constituting a plurality of first Scott-Russell mechanisms ; and an outer cylinder inserted into a boss portion of the sliding plate via a bearing, one of which is pivotally supported and the other of which is vertically extended. a boss side links the upper end of the set link is connected, before the other side is connected on one side is rotatably supported to the bearing portion of the vertical frame in the middle portion of the boss-side link
The second Scott Russell mechanism with the boss side link
Drive and the bearing-side link that make up, the over-speed engaging portion with the cam plate is engaged the sheave upper to the lower end is driven by the swing links the lower end of the concatenated connection link of the boss-side link the engaging portion by the cam plate operating via the connecting link and the swing link in the sliding plate characterized by comprising a rope catch grips the sheave dissociates to be. In the elevator governor according to the present invention, the ratio of the length between the shaft supports at both ends of the pendulum link and the shaft supports at both ends of the sheave link and the shaft at both ends of the boss-side link are provided. The ratio of the length between the support and the shaft support at both ends of the bearing-side link is 2: 1. In addition, the speed governor for an elevator according to the invention particularly corresponding to claim 3 is characterized in that a plurality of disc springs and a spacing pipe are loosely fitted to the shaft of the rope catch. Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a front view showing a first embodiment of an elevator governor according to the present invention, and corresponds to FIG. 6 shown in the prior art. FIG. 2 is an enlarged cross-sectional view taken along line AA of FIG. FIGS. 1 and 2 differ from FIGS. 6 to 9 shown in the above-described embodiment in the structure of the rotation speed detection mechanism of the sheave and the link mechanism from this detection mechanism to the rope catch. is there. That is, a pair of vertical frames 3A formed in a shallow U-shape in a cross-sectional view (not shown) are provided upright before and after the center of the base plate 2a, and the lower ends are fixed to the base plate 2a by welding. Have been. At the upper end of the vertical frame 3A, a bearing 7A
There is bolted to the bearing part 7A, sheave shaft 4A through bearings 6A is laterally disposed, in the sheave shaft 4A, it is press-fitted through the key sheave 9A is not shown. A cylindrical sliding bearing 23 is provided on the sheave shaft 4A.
The boss of the sliding disk 5 in the form of a spur gear is inserted through the shaft, and a bearing 7B is inserted into the outer periphery of the boss through a bearing 6B, and is fixed to the outer ring of the bearing 6B with a retaining ring (not shown). Have been. As shown in FIG. 2, an annular stopper having an L-shaped partial cross section is inserted and fixed to the rear end of the boss portion of the sliding disk 5. The upper ends of the strip-shaped connecting links 11A are connected to milling surfaces formed on both side surfaces of the bearing portion 7B via stepped pins (not shown). This link 11
A lower end of a connecting link 11B having a length half that of the connecting link 11A is connected via a pin to the center of A, and the upper end of the connecting link 11B is connected to both side surfaces of the above-described bearing 7A. They are connected via stepped screw pins. As a result, these connecting links 11A, 11B
When the upper end of the connecting link 11A moves left and right, the lower end of the connecting link 11A constitutes a Scott Russell mechanism that moves vertically up and down. [0054] On the front surface of Suridoenban 5 and sheave 9A, a pair of support 12A is provided vertically and horizontally in FIG. 1, the support 12A of these fixed to the sliding disc 5, the link 11C the rear end of which is connected through a pin, the front end of these links. 11C, projecting forwardly from the inside to form a window in the outer periphery of the sheave 9A. [0055] At the center of these links 11C, the rear end of the first length of the link 11D half of the link 11C is connected, the front end of these links 11D, the axis side of the sheave 9A described above Is connected to a support 12A fixed to the support 12A. Therefore, these links 11C and 11D also constitute the mechanism of Scott Russell described above. Of these, a pendulum 8A is provided at the front end of the link 11C via a double screw bolt 8a and a nut, as shown in FIGS. 3 (a) and 3 (b), which are partially enlarged views of FIGS. Installed. At the lower end of the connecting link 11A described above, FIG.
In FIG. 5, the upper end of a U-shaped joint 13A is connected via a pin. Behind the joint 13A, FIG.
The L-shaped support 14A has a rear vertical frame 3A.
Is fixed to the center of the groove. The upper end of the connecting rod 15A loosely fitted into the groove of the rear vertical frame 3A penetrates vertically through the support 14A, and the male thread formed at the upper end of the connecting rod 15A is Screwed to the lower part and fixed with nuts. A coil spring 16A is loosely fitted to the connecting rod 15A. The coil spring 16A is lightly pressed against the lower surface of the support 14 by a spring receiver at the lower end of the coil spring 16A and a double nut. The joint at the lower end of the connecting rod 15A is the same as at the upper end.
13A is screwed, and a connection link is provided at a lower portion of the joint 13A.
The upper end of 11E is connected via a pin.
The lower end of E is connected to the upper end of a connecting link 11F via a pin. As shown in FIG. 1, a pair of supports 14B are erected at the center of the base plate 2a.
22A is inserted. The lower end of the connecting link 11F is inserted and welded to the rear end of the shaft 22A. The lower end of the cam plate 17A is inserted and welded to the front end of the shaft 22A. On the right side of the cam plate 17A, a switch 18A is fixed to the vertical frame 3A via an adjustment bolt 18a, and the tip of the contact piece of the switch 18A is opposed to the right end surface of the cam plate 17A. A large support is provided on the right front side of the base plate 2a.
14C is erected, and a shaft 22B extends through the support 14C. This shaft 22B has a shaft portion 19 of a rope catch 19A.
The right end of a is inserted from the left side, and a double nut is screwed into the right end of the shaft portion 19a. The shaft portion 19a has four disc springs 20 and a spacing tube 21.
Is inserted, and the disc spring 20 is compressed to a predetermined set value by a nut and a spring receiver previously screwed to the left side of the disc spring 20. A catch portion 21a is vertically provided below the spacing tube 21, and a lower surface of the catch portion 21a is in contact with an arcuate cam surface at an upper end of the cam plate 17A. In the clevis portion 19b of the rope catch 19,
The right end of the shoe 19d fitted to the clevis portion 19b is a pin.
The left end of the shoe 19d is opposed to the governor main rope 10. A fixed catch 19e is provided upright on the left end of the base plate 2a. The operation of the thus configured elevator governor will be described. The lowering speed of the car exceeds the specified value,
When the rotation speed of the sheave 9A increases, the pendulum 8A moves to the arrow E in FIG.
1, moves at a centrifugal force in the outer circumferential direction of the sheave 9A as indicated by E2, Accordingly, the sliding disc 5 is moved forward as indicated by an arrow D together with the sliding bearing 23. [0067] Then, the link 11A to the upper end on the side surface is connected to the bearing portion 7B of the outer periphery of the boss portion of the sliding disc 5 also upper end is driven forward, which is connected via a pin to the lower end of the link 11A The joint 13A rises vertically as shown by the arrow F in FIG. 2 by the mechanism of Scott Russell constituted by the links 11A and 11B. Accordingly, the connecting rod 15A, the joint 13A and the connecting link 11E also move upward, the connecting link 11F at the lower end swings clockwise as shown by the arrow in FIG. 1, and the cam plate 17A also swings. . A spacing tube locked at the upper end of the cam plate 17A
The catch portion 21a of 21 is separated from the cam surface of the cam plate 17A, and the rope catch 19 swings counterclockwise in FIG. 1 around the shaft 22B by its own weight, as shown by the arrow C in FIG. The shoe 19d at the tip sandwiches the governor main rope 10 between itself and the fixed catch 19e. In the elevator governor constructed as described above, since the bevel gears and the like shown in FIGS. 6 and 7 of the prior art are not used, only assembly / adjustment and maintenance / inspection become easy. In addition, since no noise is generated when the bevel gears mesh with each other, it is possible to reduce noise transmitted to the car and the living room via the hoistway. Further, since the gap between the detecting portions shown in FIG. 9 is not formed, the accuracy of speed detection can be improved, and the timing of stopping the car can be easily adjusted. Further, since all the components can be accommodated between the sheave 9A and the base plate 2a, not only can the outer shape be reduced in size, but also compared to the governor shown in FIGS. Since the number of components can be reduced, installation, maintenance, and inspection work are facilitated. In the above embodiment, the sheave shaft 4
The rear portion of the sliding bearing 23 at the rear portion A has a prismatic shape, and the sliding bearing 23 also has a rectangular cylindrical shape, so that the sliding disk 5 can follow the sheave 9A during acceleration and deceleration of the sheave 9A. The stress applied to the shaft support of the pin may be reduced. Next, FIG. 4 is a partially enlarged view showing a second embodiment of the elevator governor of the present invention, and is a view corresponding to FIG. 4 is different from FIG. 3 in that it is possible to cope with a change in the weight of the pendulum. A plurality of disc-shaped pendulums 8b are inserted into both screw bolts 8a, and fixed with nuts from both sides. I have. In this case, it is possible to easily cope with a governor having a different rated speed. [0074] [Effect of the Invention] According to the present invention, the governor Shi
A sliding plate is inserted into the moving shaft, and a link mechanism of the second Scott Russell mechanism is provided between the sliding plate and the upper end of the vertical frame .
A plurality of first Scott-Russell mechanisms are provided between the vehicle and a pendulum is provided at one end, and the link is driven by the first Scott-Russell mechanism to drive the rope catch.・ Easy adjustment, maintenance and inspection
It is possible to obtain an elevator governor that can increase the detection accuracy.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view showing a first embodiment of an elevator governor of the present invention. FIG. 2 is an enlarged cross-sectional view taken along line AA of FIG. 3 is an enlarged view showing a pendulum and a link portion shown in FIG. 2, (a) is a side view, and (b) is a front view. 4 is a partially enlarged detailed view showing a second embodiment of the elevator governor of the present invention, and is a view corresponding to FIG. 3; FIG. 5 is a perspective view showing an example of a hoistway incorporating a conventional elevator governor. FIG. 6 is a front view showing an example of a conventional elevator governor. FIG. 7 is an enlarged cross-sectional view taken along line GG of FIG. 6; FIG. 8 is an enlarged cross-sectional view taken along the line HH of FIG. 6; FIG. 9 is a side view showing an example of a conventional elevator governor different from FIG. 6; [Description of Signs] 1A, 1B, 1C: governor, 2: lower frame, 2a, 2b: base plate, 2c: lower beam, 3A, 3B: vertical frame, 4A, 4B ...
Sheave shaft, 5: sliding disk, 6A, 6B: bearing, 7A, 7
B, 7C: bearing part, 8A, 8B: pendulum, 9A, 9B: sheave, 10: main line of governor, 11A, 11B, 11C, 11D, 11E,
11F… Link, 12A, 12B, 14B, 14C… Support, 15A…
Connecting rod, 16A, 16B, 16C ... Coil spring, 17A, 17B,
17C: cam plate, 18A, 18B: switch, 19A, 19B: rope catch, 20: disc spring, 21: spacing tube, 22A, 22B,
22C, 22D: shaft, 23: sliding bearing.

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B66B 5/04

Claims (1)

(57) [Claims 1] A sheave shaft having both ends inserted into a bearing portion at an upper end of a vertical frame, and a governor main rope wound around an outer periphery of the sheave shaft which is press-fitted on one side of the sheave shaft. A sheave, a sliding plate in which a boss is inserted axially movably on the other side of the sheave shaft, and a plurality of sliding plates having one side pivotally supported on the other side and a pendulum on the other side. A plurality of pendulum links , one side of which is pivotally supported at an intermediate portion of the pendulum link, and the other side which is pivotally supported by the sheave, together with the pendulum link.
A plurality of sheave links that constitute one Scott Russell mechanism, and one end is pivotally supported by an outer cylinder inserted into the boss portion of the sliding plate via a bearing, and the upper end of a vertical link is connected to the other side. and the boss-side link, the boss-side Li other side one side is connected to an intermediate portion of the boss-side link is pivotally supported on a bearing portion of the vertical frame
And the bearing-side link that make up the second Scott Russell mechanism together with ink, the engaging portion is engaged with the cam plate upper to the lower end is driven by the swing links the lower end of the concatenated connection link of the boss-side link a rope catching for gripping the sheave and the engagement portion is dissociated by the cam plate operating via the swing links and the connecting link the slide plate which is driven by the over-speed of the sheave Elevator governor equipped with