KR100609836B1 - Rope braking device for elevator - Google Patents

Abstract

The present invention relates to an emergency situation caused by an emergency situation such as an overspeed due to a control abnormality during operation of an elevator or the operation of the door when the door is opened, breakage of the brake, abrasion of the brake lining, slippage of the reduction gear pulley and rope, The present invention relates to an elevator rope braking device capable of quickly and safely stopping an elevator car at the time of occurrence of an emergency, and is configured to be rotatable along a bearing inner ring part (70) on the back surface of a fixed brake shoe (80) A sector gear portion 60 having a gear on its outer peripheral surface; A crankshaft 66 horizontally fitted in the hole 61 of the sector gear portion 60 and capable of pivoting at the same time when the sector gear portion 60 rotates up and down; An elastic part (120) which constantly pushes the crankshaft (66) to the upper side; An interlocking link piece 62 which is formed at one end of the crankshaft 66 and which is connected to the moving brake shoe 82 and which is pulled back and forth by the sector gear portion 60; A drive shaft 99 including a drive gear portion 98 engaged with the sector gear portion 60 to pivot the sector gear portion 60 up and down; A clutch (90) for connecting or disconnecting the drive gear (98) and the drive shaft (99); A geared motor 101 for rotating the drive shaft 99; And a cam clutch 108 for preventing reverse rotation of the drive shaft 99. As shown in Fig.

A sector gear portion, an elastic portion, a drive gear portion, a drive shaft, a clutch, and a cam clutch

Description

[0001] ROPE BRAKING DEVICE FOR ELEVATOR [0002]

1 is a system configuration diagram showing an elevator braking device.

2 is a perspective view of a conventional rope braking device for an elevator in which a hydraulic device for releasing the braking is provided;

3 is a perspective view of a conventional rope braking device for an elevator having a hydraulic device for braking.

4 is an overall perspective view of a rope braking device for an elevator according to the present invention.

5 is a perspective view showing an operation part of a rope braking device for an elevator of the present invention.

6 is a side sectional view showing a braking release state of the elevator rope braking device of the present invention.

7 is a side sectional view showing a braking state of the rope braking device for an elevator of the present invention.

8 is a view showing the back surface state of the elevator rope braking device of the present invention.

9 is a perspective view showing a lining of a rope braking device for an elevator of the present invention.

10 is a view showing a groove formed in the lining of the elevator rope braking device of the present invention.

Fig. 11 and Fig. 12 show another embodiment of the rope braking device for an elevator of the present invention. Fig.

13A and 13B are views showing still another embodiment of a rope braking device for an elevator according to the present invention.

14 is a perspective view of a sector gear and a bearing inner ring part of a rope braking device for an elevator of the present invention.

       Description of the Related Art [0002]

       60: sector gear portion 61: hole

       62: interlocking link piece 66: crankshaft

       70: bearing inner ring part 77: guide rod

       78: Guide hole 80: Fixed brake shoe

       82: moving brake shoes 84, 86: lining

       87: undercut portion 89: groove line portion

       90: clutch 98:

       99: drive shaft 100: rope

       101: geared motor 108: cam clutch

       120: elastic part 130: switch part

       132: cam portion

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rope braking device for an elevator, and more particularly to a rope braking device for an elevator, The present invention relates to an elevator rope braking device capable of quickly and safely decelerating and stopping an overspeed caused by a loss of braking frictional force due to insufficient frictional force between a pulley and a rope.

1, a conventional braking device for an elevator includes a main brake 4 installed on a hoisting machine 2 having a speed reducer pulley 6, a governor 7 for detecting an abnormal speed, And a rope braking device unit 10 for braking the rope 8. The safety device 22 includes a safety device 22,

Further, on the upper side of the elevator car 20, there is formed a position detecting device 21 capable of grasping the position.

The main brake 4 mounted on the hoisting machine 2 is based on braking maintenance upon arrival of the target floor of the elevator car 20. When an overspeed occurs, the governor 7 detects an abnormal speed and rapidly brakes the elevator car 20 However, in the case where braking can not be maintained due to wear and breakage of the lining of the main brake 4, there is a problem that the overspeed condition of the elevator car 20 can be caused.

Emergency braking can be performed by detecting the abnormal speed by the governor 7 and operating the safety device 22 provided in the elevator car 20. However, when the elevator balance weight 14 is heavy The elevator car 20 has to be provided with means for controlling the elevator car 20 so as to be controlled.

Until recently, a safety device 22 capable of restraining an elevator in both directions was used, or a safety device 22 was additionally installed on the side of the balance weight 14 to indirectly prevent elevator overcurrent have.

However, there is a problem in that the operation of the bidirectional safety device must provide many kinds of models according to the specifications of the guide rails 24, which are constrained by the designated load and speed of the elevator car 20, As the work is carried out in the hoistway at the time of manual return, there is a considerable risk in the rescue operation and repair workability.

In particular, in the case of a door-to-door departure that is operated while the door of the elevator is open, since it is not an abnormality detection range by the governor 7, a separate detection device for this and a gripping force for compulsorily generating jaws There is a problem in that a device that can be used can be separately configured.

In order to solve such a conventional problem, a patent document No. 257491 discloses a rope braking device having a cam operated and a hydraulically operated releasing device. In the registration number 20-0221450, A rope braking device having a releasing device by a spring force is proposed. As shown in Fig. 1, the rope braking device is provided on a bed of the hoisting machine 2 and brakes the rope 8.

2, the brake shoe 32 controlling the rope 8 is brought into close contact with the fixed brake shoe 30 by the links 40a, 40b, so that the both links 40a, Descending horizontal frame 42 is moved along the cam surface 45 formed on the side plate by the elastic spring 43 between the upper and lower horizontal frames 42 and 40b to press the rope, And the hydraulic cylinder 44 is controlled according to the command of the hydraulic pressure generating unit.

The hydraulic braking device shown in Fig. 3 pushes the hydraulic plate 35 interlocked with the hydraulic cylinder 25 by the hydraulic pressure generator to the fixed plate 33 to press the rope 3 to brake the braking device, The hydraulic oil in the cylinder 25 is sent to the hydraulic oil tank to release the locking of the rope 3 by the elastic spring 29 formed between the hydraulic plate 35 and the fixed plate 33.

When the hydraulic pressure generating unit and the hydraulic cylinder 25 are used for generating the braking force and releasing the braking force of the braking device as described above, the hydraulic pressure generating unit and the control unit for controlling the hydraulic cylinder 25, In particular, in the case of hydraulically operated braking devices, the risk of loss of braking power is fundamentally implied in the event of damage to the valve, rupture of the hose, or breakage of the component parts such as the cylinder or air compressor If the machine room temperature drops to near the pour point of the hydraulic oil, even if an emergency occurs, the rope braking due to the hydraulic operation becomes impossible due to the viscosity increase of the hydraulic oil.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above-mentioned problems occurring in the prior art, and it is an object of the present invention to provide a braking / Provides a rope braking device for an elevator that basically solves the braking power loss due to parts damage of the hydraulic braking system and the braking impossible condition due to temperature characteristics by applying the power source for generation to the spring and adopting the motor drive as the power source for braking release. do.

In order to achieve the above object, a rope braking device for an elevator according to the present invention is configured to be capable of pivoting up and down along a bearing inner ring portion provided at a center portion of a back surface of the fixed brake shoe, A configured sector gear portion; A crankshaft horizontally fitted in the hole of the sector gear portion and configured to pivot at the same time when vertically moving; An elastic portion formed such that the crankshaft is always pushed in a direction in which the rope is pressed; An interlocking link piece formed to be interlocked with one end of the crankshaft, the other end of the interlocking link piece being interlocked with the moving brake shoe and being pulled and pushed forward and backward when the sector gear portion is moved; A drive shaft having a drive gear portion meshed with the sector gear portion so as to pivot the sector gear portion up and down; A clutch for connecting or disconnecting the drive unit and the drive shaft; A geared motor for generating a driving force to rotate the drive shaft; And a cam clutch or an electromagnetic brake for preventing reverse rotation of the drive shaft.

The rope braking device of the elevator of the present invention constructed as above will be described in detail as follows.

Fig. 4 is a perspective view of the elevator rope braking device according to the present invention, Fig. 5 is a perspective view showing only the operating portion of the elevator rope braking device, Fig. Fig. 7 is a side sectional view showing the braking state of the elevator rope braking device of the present invention, Fig. 8 is a view showing the back surface state of the elevator rope braking device of the present invention, Fig. 10 is a perspective view showing a groove formed in the lining of the elevator rope braking device of the present invention, and Figs. 11 and 12 are perspective views of the rope braking device for an elevator according to the present invention, 13A and 13B are views showing another embodiment of the elevator rope braking apparatus of the present invention. Fig. 8 is a view showing still another embodiment. Fig.
14 is a perspective view showing a sector gear and a bearing inner ring part of a rope braking device for an elevator of the present invention.

The present invention is configured such that the moving brake shoe 82 moves toward the fixed brake shoe 80 and presses the rope 100 moving between the brake shoes 80 and 82 as shown in Fig. do.

The back surface of the fixed brake shoe 80 facing the movable brake shoe 82 for the operation of the movable brake shoe 82 for pressing and stopping the rope 100 is provided with an up- A sector gear portion 60 having a hole 61 that moves as far as possible is formed.

The crankshaft 66, which is pivotably moved in the same direction as the crankshaft 66, is inserted into the hole 61 of the sector gear portion 60 formed on the rear surface of the fixed brake shoe 80 in a state of being penetrated.

At both ends of the crankshaft 66 interlocked with the sector gear portion 60, an interlocking link piece 62 is formed in parallel to the moving brake shoe 82 side.

A movable brake shoe 82 positioned opposite to the fixed brake shoe 80 is connected to one end of the interlocking link piece 62 so that the movable brake shoe 82 is pushed toward the fixed brake shoe 80 .

As shown in Fig. 5, elastic portions 120 are formed on the lower side of the crankshaft 66 so as to be always pushed to the upper side.

At both ends of the fixed brake shoe 80, side plates 76 are integrally formed at both ends so as to be formed in a C shape.

A drive shaft 99 is formed on the side plate 76 formed on both sides of the stationary brake shoe 80 so that the drive shaft 99 is rotatably engaged with gears formed on the outer circumferential surface of the sector gear portion 60, And a driver unit 98 that rotates is formed.

The inner diameter side of the drive gear unit 98 of Figure 4 is supported by a bearing 133 and is rotatably combined with the drive shaft 99. A side surface of the drive gear unit 98 is connected to a moving armature 92b of the clutch 90 It is fixed and assembled.

A geared motor 101 is formed on the lower side of the drive shaft 99 and power is transmitted to the drive shaft 99 by the sprockets 102 and 104 and the chain 106.

14, the semi-circular bearing inner ring portion 70 is formed so as to be semicircularly moved while being slid on the back surface of the fixed brake shoe 80 by engaging with the drive gear portion 98 of the sector gear portion 60 do.

A plurality of circular rod rollers 72 are formed in a semicircular shape at a position on the inner diameter side of the position where the guide groove 83 in the semicircular shape is formed, Are rotatably assembled at regular intervals.

A roller 79 disposed in a hole penetrating through the sector gear portion 60 at a predetermined interval is inserted into the guide groove portion 83 of the bearing inner ring portion 70 to perform rolling driving. As shown in Fig.

At both lower sides of the crankshaft 66, an elastic portion 120 having elasticity is formed so that the moving brake shoe 82 can be moved toward the fixed brake shoe 80.

The center of rotation of the bearing inner ring part 70 of the semicircular shape and the center line of the moving brake shoe 82 engaged with the interlocking link piece 62 are configured to have a difference in height from each other.

9 and 10, the groove line portions 89 can be formed on the lining 84 and 86 surfaces formed on the moving brake shoe 82 and the stationary brake shoe 80, The lower portion of the line portion 89 is formed with an undercut portion 87 of 50 degrees or less with respect to the center of the rope 100.

A fixed armature 92a and a moving armature 92b are provided at one end of a drive shaft 99 rotatably assembled to the both side plates 76. The engaging shape of the fixed armature 92a and the movable armature 92b is such that the engaging teeth a, (b) is formed.

Rotation preventing cam clutch 108 is formed on any one of the output shaft of the geared motor 101 and the drive shaft 99. When the cam clutch 108 is not applied, the geared motor 101 equipped with the electromagnetic brake .

7 and 8, a drive unit 98 is mounted on the drive shaft 99 to sense a compression completion time of the elastic part 120 and a wear limit time point of the linings 84 and 86, And a plurality of switches (not shown) operated at respective required positions in accordance with the height of the cam portion 132 are provided at an upper portion of the outer circumferential surface of the cam portion 132 rotated as the drive gear portion 98. [ (130). The cam 132a of the cam 132 contacts the switch 130a of the switch 130 so that the signal is transmitted to the switch 130a, The cam 132b of the cam 132 reaches the limit of abrasion of the lining 84 or 86 due to continuous braking so that the cam 132b of the cam 132 reaches the end of the compression of the switch 130 The contact with the switch 130b generates a signal, so that the wear limit threshold of the linings 84 and 86 can be known. Here, the cam 132b of the cam 132 is brought into contact with the switch 130b of the switch unit 130 to generate a signal immediately before the point of design frictional force or less.

The fixed brake shoe 80 is formed with a guide rod 77 protruding from one side and a guide hole 78 formed in the movable brake shoe 82 so as to be guided while being guided by the guide rod 77.

The operating state of the above-configured rope braking device for an elevator according to the present invention will be described in detail below with reference to the accompanying drawings.

The rope braking device of the elevator of the present invention is characterized in that when the moving brake shoe 82 presses the rope 100 after an emergency operation as shown in Fig. 7 and a signal for releasing the braking is generated, A current is applied to the coil portion 92c of the clutch 90 and a magnetic force is generated between the moving armature 92b and the fixed armature 92a. The movable armature 92b moves to the fixed armature 92a by the generated magnetic force so that the movable armature 92b and the stationary armature 92a are engaged with the teeth formed on the outer periphery as shown in FIG. 13B, a plurality of fin portions 135 having a predetermined inclination angle are formed on the side surface of the moving armature 92b, and the fixed armature 92a has a plurality of holes 136 having the same inclination angle as the inclination angle of the fin portion 135 And are engaged with each other.

The configuration of the power interrupter is characterized by being capable of interrupting a large power with a small size and the inclination angle of the engaging surface of the fin 135 can be set to 6 degrees or more and 45 degrees or less.

Accordingly, the drive unit 98 integrally formed with the moving armature 92b and the drive shaft 99 integrally formed with the fixed armature 92a can be driven in a meshed state.

A current for starting is supplied to the geared motor 101 at the same time as the current to the clutch 90 is applied and the sprocket 102 mounted on the output shaft of the geared motor 101 is rotated together with the rotation of the geared motor 101, And rotates the sprocket 104 of the drive shaft 99 interlocked with the sprocket 104 in the same direction.

When the drive shaft 99 is rotated simultaneously with the sprocket 104, the drive shaft 99 and the drive gear 98 are rotated by the magnetic force of the clutch 90 as described above, 60 are interlocked to rotate the sector gear portion 60 downward.

The sector gear portion 60 which is lowered by the rotational force of the drive gear portion 98 rotates along the bearing inner ring portion 70 formed on the fixed brake shoe 80 of the present invention as shown in Fig. .

The crankshaft 66 inserted in the hole 61 formed on the outer peripheral side of the sector gear portion 60 also descends at the same time when the sector gear portion 60 is lowered to the lower side, The elastic portions 120 provided on the lower portions of both sides of the elastic members 120 and 120 are compressed.

At this time, along with the descent of the crankshaft 66, the moving brake shoe 82 interlocked with the interlocking link piece 62 assembled at both ends of the crankshaft 66 is moved away from the rope 100, Release.

Compression of the elastic part 120 is performed up to the designated position and completion of the compression is performed in response to the detection signal of the switch 130 by the operation of the cam part 132 rotating and connected to the driver part 98.

When the signal of the switch 130 is inputted by the rotation of the cam portion 132, the current supplied to the geared motor 101 is cut off and the power to the drive unit 98 is no longer transmitted. However, even in this case, the current supplied to the clutch 90 is continuously supplied, and the drive gear unit 98 and the drive shaft 99 are integrally held by the magnetic force.

If the current supplied to the geared motor 101 is cut off and no further power is generated, the elastic portion 120, which is compressed by the rotation of the drive gear portion 98, generates a force for returning due to the accumulated elastic force, The moving brake shoe 82 separated from the rope 100 is moved back toward the stationary brake shoe 80 by rotating the driving shaft 99 including the driving gear portion 98 backward to press the rope 100.

In order to prevent this, a fixed holding device for preventing reverse rotation of the sector gear portion 60 is required. In the present invention, as shown in FIG. 8, either the output shaft of the geared motor 101 or the drive shaft 99 It is possible to install the cam clutch 108 which restrains one of the gears in one direction or to apply the geared motor 101 including the electromagnetic brake 140 as shown in FIG. 11 to disable the reverse rotation of the sector gear portion So that the elastic part 120 can be maintained in a compressed state.

When the resilient portion 120 is maintained in the compressed state as described above, the two brake shoes 80 and 82 of FIG. 7 and the rope 100 remain separated and the elevator moves smoothly.

When an emergency occurs during use of the elevator, the rope braking device for an elevator of the present invention operates as follows.

As shown in Fig. 6, in the state where the moving brake shoe 82 is released, the detection of the abnormal driving state that occurs during the elevator operation is performed by detecting overspeed by the governor 7 Or the position detection device 21 for detecting the position of the floor of the elevator car.

In the rope braking device of the present invention, the power supplied to the clutch 90 formed at one end of the driving shaft 99 is cut off, and the fixed armature 92a and the moving armature 92b of the clutch 90 are disconnected, The moving armature 92b mounted on the driving gear unit 98 is separated from the fixed armature 92a of the clutch 90 so that the driving gear unit 98 is in a free state And the crankshaft 66 of the sector gear portion 60 driven by meshing with the drive gear portion 98 is urged by the elastic force of the elastic portion 120 located at the lower end side, .

The vertical bar 124 is inserted into the guide slider cap 126 on the inner diameter side of the elastic part 120 to be compressed and expanded so that the elastic part 120 is bent toward the outer peripheral surface during compression and expansion of the elastic part 120 Only vertical motion is allowed in the longitudinal direction so as not to be bent to the side.

On the upper crankshaft 66 of the elastic portion 120 and the rotary fixed shaft 112 located at the lower portion of the elastic portion 120 so as to push the crankshaft 66 in a vertical state during the contraction and expansion of the elastic portion 120, A spring seat portion 113 and a lower spring seat portion 110 are formed.

The crankshaft 66 moves while rotating within the sector gear portion 60 at a predetermined angle when the elastic portion 120 moves along the sector gear portion 60 by the lower spring seat 110.

Here, the material of the elastic portion 120 is preferably an annular material having a tensile strength of 140 kgf / mm ² or more.

When the crankshaft 66 is elevated, the sector gear portion 60 coupled to the crankshaft 66 is simultaneously rotated to the upper side. At this time, the sector gear portion 60 is rotated along the radius of the bearing inner ring portion 70 formed on the fixed brake shoe 80, and the interlocking portion 60, which is provided at both ends of the crankshaft 66, A braking operation is performed by moving the moving brake shoe 82, which operates in linkage with the link piece 62, momentarily toward the stationary brake shoe 80 to press the rope.

Here, the center of the bearing inner ring portion 70, which is the rotation center of the sector gear portion 60, does not coincide with the center line of the moving brake shoe 82 assembled with the interlocking ring piece 62 and has a constant deviation .

When the crankshaft 66 is gradually moved upward along the bearing inner ring portion 70 due to wear of the linings 84 and 86 due to repetitive braking, the elastic force of the elastic portion 120 is reduced The crankshaft 66 is arranged so that the normal force acting in accordance with the turning radius of the crankshaft 66 is always constant so that the elastic force of the crankshaft 66 due to wear of the lining 84, The pressing force of the moving brake shoe 82 for pressing the rope 100 is the same even if the position is located at any position on the rotational locus.

This is because, in the case of the conventional mechanical braking device in which the spring force is vertically applied to the brake shoe in addition to the braking device using the conventional hydraulic device mentioned in the present invention, the reduction of the braking spring force due to the lining wear results in a fundamental braking quality It can be said that the mechanism configuration is improved.

The connecting portion of the moving brake shoe 82 and the interlocking link piece 62 interlocked with the crankshaft 66 assembles the bearings to minimize the frictional force caused by the rotation of the interlocking link piece 62 during the ascending and descending movement .

The movable brake shoe 82 and the fixed brake shoe 80 are brought into contact with each other due to the generation of the pressing force by the elastic force of the elastic portion 120 as described above and the rope 100 located therebetween is instantaneously frictionally braked.

At this time, since the moving brake shoe 80 of the present invention is provided with the guide hole 78 for sliding and is inserted and moved in the guide bar 77 fixed to the fixed brake shoe 82 vertically, And only move back and forth along the guide bar 77. [

9, linings 84, 86 for generating frictional braking force are mounted on the abutting surfaces of the movable brake shoe 82 and the fixed brake shoe 80. As shown in Fig.

A lining groove line portion 89 is formed on a surface of the lining 84 and 86 so that the rope 100 is positioned on the lining groove line portion 89 to be fitted.

In the present invention, as shown in FIG. 10, the undercut portion 87 is formed in the lining groove line portion 89 to increase the braking frictional force.

The U-shaped groove line portion as shown in Fig. 10A and the U-shaped groove line portion as shown in Fig. 10C of the present invention as compared with the V-shaped groove line portion as shown in Fig. 9B, Shaped groove line portion is larger than the shape in which only the U-shaped groove line portion is formed, a high frictional force can be obtained even with a small pressing force, and the frictional force is lower than that of the V-shaped groove line portion, This is a shape that can prevent abrupt wear, which is a problem of the groove line portion.

In the present invention, the angle of the undercut portion 87 is set to 50 degrees or less with respect to the center of the rope 100 to increase the frictional force and reduce the wear rate. When the angle of the undercut portion 87 is 50 degrees, The friction force can be increased by about 20%.

Therefore, in the present invention, it is generally preferable to use a groove shape including the undercut portion 87 in the U-shaped groove line portion 89 to increase the frictional force more than the U-shaped groove line portion.

Since the undercut portion 87 formed on the U-shaped groove line portion 89 can obtain a large frictional force even with a small pressure, the elastic force of the elastic portion 120 to be compressed can be minimized, It is possible to minimize the required power at the time of compressing the part 120, which is a very useful feature.

12, a movable brake shoe 82 and a fixed brake shoe 80 are provided on a drive shaft 99 together with a cam portion 132 for detecting the completion of compression of the elastic portion 120 upon releasing the braking force, And a cam portion 132 for indicating the replacement timing according to the abrasion amount of the lining 84 and 86 in progress is additionally provided.

Therefore, with the rope braking device of the elevator of the present invention, it is possible to always press the rope with a constant braking force irrespective of a change in the elastic force which is reduced by abrasion of the lining, so that the rope is very stable in terms of braking quality, It is possible to provide a rope braking device for an elevator that solves an increase in product cost due to a hydraulic device configuration and at the same time solves the risk of loss of braking force due to component damage of the hydraulic braking system and temperature characteristic have.

In addition, features such as lining groove shape with undercut, toothed clutch, annular elastic material with tensile strength of 140kgf / mm ² or more, and cam clutch can be used to manufacture a small braking device, have.

Claims (11)

An elevator rope braking device for pressurizing and braking a rope (100) positioned between a moving brake shoe (82) having a lining on its inner side and a fixed brake shoe (80) A sector gear portion 60 formed on a rear surface of the fixed brake shoe 80 so as to be vertically pivotable and having a hole 61 on an outer peripheral side thereof; A crankshaft 66 horizontally fitted in the hole 61 of the sector gear portion 60 and configured to be moved at the same time when vertically moving; An elastic portion 120 formed to push the crankshaft 66 to the upper side at all times; The other end of the sector gear portion 60 is coupled to the movable brake shoe 82 so as to be pulled in the forward and backward directions when the sector gear portion 60 is moved up and down. An interlocking link piece 62 formed thereon; A drive shaft 99 having a drive gear portion 98 meshing with the sector gear portion 60 to pivot the sector gear portion 60 up and down; A clutch (90) for connecting or disconnecting the drive shaft (99) and the drive gear (98); A geared motor 101 for generating a driving force to rotate the driving shaft 99; And an electromagnetic brake (140) for preventing reverse rotation of the drive shaft (99). A rope braking device for an elevator that presses and brakes a rope (100) positioned between a moving brake shoe (82) and a fixed brake shoe (80) A sector gear portion 60 formed on a rear surface of the fixed brake shoe 80 so as to be vertically pivotable and having a hole 61 on an outer peripheral side thereof; A crankshaft 66 horizontally fitted in the hole 61 of the sector gear portion 60 and configured to be moved at the same time when vertically moving; An elastic portion 120 formed to push the crankshaft 66 to the upper side at all times; The other end of the sector gear portion 60 is coupled to the movable brake shoe 82 so as to be pulled in the forward and backward directions when the sector gear portion 60 is moved up and down. An interlocking link piece 62 formed thereon; A drive shaft 99 having a drive gear portion 98 meshing with the sector gear portion 60 to pivot the sector gear portion 60 up and down; A clutch (90) for connecting or disconnecting the drive shaft (99) and the drive gear (98); A geared motor 101 for generating a driving force to rotate the driving shaft 99; And a cam clutch (108) for preventing reverse rotation of the drive shaft (99). The bearing according to claim 1 or 2, wherein the sector gear portion (60) comprises a semicircular bearing inner ring portion formed to be semicircularly moved while the other end of the sector gear portion (60) (70). ≪ / RTI > 4. The brake lever according to claim 3, wherein the rotational center of the semi-circular bearing inner ring part (70) is not located on the center line of the moving brake shoes (82) combined with the interlocking link piece (62) Wherein the rope braking device is a braking device for an elevator. 3. The elevator according to claim 1 or 2, wherein an undercut portion (87) is formed on the lining groove line portion formed on the surface of the lining, and the angle of the undercut portion (87) Rope braking device. The driving apparatus according to any one of claims 1 to 7, further comprising: a driving arm coupled to the driving arm, the moving armature being fixedly assembled to the driving arm, Which is formed of a clutch 90 including a fixed armature 92a which is formed on the inner surface of the moving armature 92b and the fixed armature 92a and which is formed of either a tooth or a pair of pin portions 135 / And the rope braking device for an elevator.        The elevator rope braking device according to claim 6, wherein the tooth profile of the clutch (90) and the inclination angle of the pin portion (135) and the hole portion (136) are 6 degrees or more and 45 degrees or less. The rope braking device for an elevator according to claim 2, wherein the cam clutch for preventing reverse rotation is formed at any one of an output shaft of the geared motor (101) or a drive shaft (99). The rope braking device for an elevator according to claim 1, wherein the electromagnetic brake (140) is mounted on a geared motor (101) or a drive shaft (99). The cam unit (132) according to any one of claims 1 to 7, wherein a cam unit (132) interlocking with the drive unit (98) is formed on the drive shaft (99), and a switch unit To the elevator rope braking device. The rope braking device for an elevator according to claim 1 or 2, wherein the elastic portion (120) is a spring having a tensile strength of 140 kgf / mm ² or more.

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