KR100451818B1 - Rope Braking Device For Elevator - Google Patents

Abstract

The present invention provides a fixed frame having opposite side walls spaced apart from each other, a fixed brake fixedly adjacent to a rope between both side walls on one side of the fixed frame, and movable between the fixed brake with the rope interposed therebetween. A brake, an actuating plate installed to reciprocate a predetermined section in the fixed frame and connected to the movable brake, a braking spring for elastically pressing the actuating plate to a braking position to which both brakes approach, and the actuating plate to both sides. An elevator rope braking device having a driving means for moving to a brake release position at which a brake is spaced apart or for locking and releasing a moved state, wherein the driving means is rotated at both ends of the fixing frame at opposite ends of the fixing frame. A main shaft which is provided to be capable of being installed, and both ends of which are in one region of the main shaft. Brake driving unit is coupled and the other end having at least one operating crank coupled to the operating plate and; A motor assembly for rotating the main shaft so that the actuating crank presses the actuating plate so that the two brakes are spaced apart from the braking release position; A braking operation electronic valve which prevents or permits the main shaft to rotate in the braking direction depending on the power supply, thereby allowing the brake release position of both brakes to be maintained or approach the braking position; Maintains a brake release state of both brakes during normal operation of the elevator, and brakes both brakes during abnormal operation of the elevator, and separates both brakes to a brake release position when normal operation is possible in the abnormal operation state. It characterized in that it has a control unit for controlling the driving of the braking operation electronic valve and the motor assembly.

As a result, the brake braking device can be automatically released to release the rope braking state by separating the movable brake and the fixed brake safely and easily, and the elevator rope braking device can be stably maintained.

Description

Rope Braking Device For Elevator

The present invention relates to a rope braking device for an elevator.

As shown in FIG. 1, a general elevator 3 includes a car 4 on which a person or cargo rides, a guide rail 6 for guiding the car 4, and a car towing rope 5. And a traction machine 7 for partially winding the rope 5 to raise and lower the car 4 and a load appropriate for the weight of the car 4 to reduce the load on the hoist 7. It consists of a counter weight 8 provided at the other end of the rope 5 so as to face it.

Such an elevator (3) is an accident that the car (4) rises or falls by the weight difference between the car 4 and the counterweight (8) due to the braking capacity of the hoist 7 and the abnormal operation of the braking means May occur, and an accident in which the car 4 stops at the destination floor and then slips arbitrarily may occur.

Accordingly, the elevator rope braking device (A) to the elevator (3) to grab the rope (5) momentarily and brake the car (4) when the car (4) is abnormally operated, such as a falling fall, a falling fall, and a slip. Is provided.

As shown in FIGS. 2A and 2B, the rope brake device 201 for an elevator has a fixed plate 221 having linings 221a and 223a and a movable plate 223 by a pressing force of the hydraulic cylinder 260. When the car 4 of the elevator 3 falls down, falls down or slides while being spaced apart from each other, the compression spring 255 elastically compresses while the pressure of the hydraulic cylinder 260 is released. As the movable plate 223 approaches the fixed plate 221 momentarily, both linings 221a and 223a pressurize and brake the rope 5 to stop the car 4.

By the way, in such a conventional elevator rope braking device 201, as shown in FIG. 2B, since the movable plate simply approaches parallel to the fixed plate in the direction of the arrow a, the car 5 is braked. (4) or the counterweight (8) is overloaded, excessive friction between the rope (5) and the lining causes a great wear of the lining, greatly reducing the braking force, the rope (5) to raise the car 4 or There is a problem of slipping in the downward direction (arrow b direction).

In addition, the car 4 is suddenly braked because the movable plate momentarily approaches the stationary plate and brakes the rope 5 when the hydraulic pressure of the cylinder is released during abnormal operation of the car 4 (rising fall, falling fall and sliding). There is a risk of occupants causing shock.

In addition, since the means for pressing the movable plate toward the stationary plate depends only on the expansion force of the compression spring, when the braking device is operated after being left for a long time, the pressing force of both linings decreases due to the change in the elastic strength of the compression spring. This happens.

In particular, in braking the rope 5 in which lubricating substances such as grease are buried, there is a problem in that the braking force is limited by simply moving the movable plate in parallel toward the fixed plate. That is, there is a high possibility that the brake rope 5 will slip between both linings.

In addition, since the conventional elevator rope braking device 201 uses a hydraulic method, there is a problem that the production cost rises and the product price increases due to the use of expensive components such as a hydraulic cylinder and a hydraulic feeder.

In order to solve this problem, the applicant has developed an elevator rope braking device 101, as disclosed in Korean Patent Registration No. 10-392746. As shown in FIG. 3C, the elevator rope braking device 101 is provided with a braking spring when the movable brake 123 is spaced apart from the fixed brake 121 in parallel with the car 4. The movable brake 123 instantaneously approaches the fixed brake 121 by the elastic force of 147 to brake the rope 5. At this time, the movable brake 123 approaches in parallel with the fixed brake 121, and has a structure in which the movable brake 123 is in close contact with the fixed brake 121 while moving in the longitudinal direction of the rope 5.

Therefore, even when the slip of the rope 5 occurs due to the wear of the brake pad, the movable brake 123 moves in the sliding direction of the rope 5 to be in close contact with the fixed brake 121, so that the wear and compression spring of the brake pad may be reduced. It is possible to prevent the braking force from falling in response to the change in the elastic strength and the slippery of the lubricant.

In addition, by implementing the structure of the drive unit 130 for executing the approach and the separation operation of the movable brake 123 in a mechanical structure, it is possible to reduce the product price.

By the way, in the conventional rope braking device for the elevator 101, during the configuration of the drive unit 130, the braking releasing to separate the two brakes (123, 121) in a braking state in which the movable brake 123 and the fixed brake 121 are in close contact with each other. Since the operator is to work in such a way as to push the movable brake 123 manually from the fixed brake 121 by using a tool such as a hexagon wrench or a spanner, the braking release operation is very inconvenient. .

Particularly, when the pressing force for accidentally pushing the movable brake 123 from the fixed brake 121 is released, the movable brake 123 is momentarily approached to the fixed brake 121 by the elastic force of the compression spring. Therefore, there is a problem that a safety accident such as serious injury due to part of the worker's body is caught.

Accordingly, an object of the present invention is to automatically release the braking operation to safely and easily spaced apart the movable brake and the fixed brake to release the rope braking state, the elevator rope braking device capable of stably maintaining the rope braking release state Is provided.

1 is an installation state of the rope brake device for an elevator,

Figure 2a, Figure 2b is a cross-sectional plan view and a partial side cross-sectional view of the brake pad region of the conventional elevator rope braking device,

3 is a perspective view of another conventional rope braking device for an elevator,

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

5 is an exploded perspective view of FIG. 4;

6 is a view illustrating a camp profile groove operating relationship formed in the clutch of FIG. 5;

7A and 7B are plan views of the braking release and braking position states of the braking device of FIG. 4;

8a to 8d are side cross-sectional views of FIG.

9 is a rear view of the elevator rope braking apparatus according to another embodiment of the present invention,

10 is a rear view of the elevator rope braking apparatus according to another embodiment of the present invention.

* Explanation of symbols for the main parts of the drawings

10: fixed frame 20: brake

30: brake operation unit 31: brake operation unit

33: operation plate 50: drive means

51: Brake driving unit 53: Braking operation unit

55: braking spring 61: spindle

69: spindle buffer 71: braking operation shaft

73: motor assembly 75: braking operation electronic valve

93: limit switching unit

The object is, according to the present invention, a fixed frame, a fixed frame having opposite side walls spaced apart from each other, a fixed brake fixed adjacent to the rope between both side walls on one side of the fixed frame, and the rope between A movable brake approaching and spaced apart from the fixed brake, an actuating plate installed to reciprocate a predetermined section in the stationary frame and connected to the actuating brake, and a braking to elastically press the actuating plate to a braking position to which both brakes approach. An elevator rope braking device having a spring and driving means for moving the operation plate to a brake release position at which the two brakes are spaced apart or locking and unlocking the moved state, wherein the driving means is the other side of the fixed frame. A main shaft having both ends rotatably installed at both side walls thereof, Brake driving unit is eccentrically coupled and the other end to an area of the machine main shaft with at least one operating crank coupled to the operating plate and; A motor assembly for rotating the main shaft so that the actuating crank presses the actuating plate so that the two brakes are spaced apart from the braking release position; A braking operation electronic valve which prevents or permits the main shaft to rotate in the braking direction depending on the power supply, thereby allowing the brake release position of both brakes to be maintained or approach the braking position; Maintains a brake release state of both brakes during normal operation of the elevator, and brakes both brakes during abnormal operation of the elevator, and separates both brakes to a brake release position when normal operation is possible in the abnormal operation state. It is achieved by a rope braking device for an elevator characterized in that it has a control unit for controlling the driving of the braking operation electromagnetic valve and the motor assembly. Here, both sides of the fixing frame in the longitudinal direction in the region adjacent to the main shaft. A braking operation shaft rotatably coupled to the wall, and the first and second chain gears interlocked by a chain are respectively coupled to the main shaft and the braking operation shaft; Preferably, the motor assembly and the braking operation electromagnetic valve are connected to both ends of the braking operation shaft. The motor assembly includes a braking release motor for rotating the braking operation shaft in a braking release direction, and the brakes are braked. It is effective to have a clutch that disconnects the braking release motor and the braking operation shaft when approaching the position, and connects the braking release motor and the braking operation shaft when the two brakes are spaced apart from the braking release position. The braking operation electromagnetic valve has a fixed electromagnetic side installed in a fixed frame adjacent to one end of the braking operation shaft, a movable electromagnetic side coupled to the other end of the braking operation shaft, and a magnetic field is formed between the fixed electromagnetic side and the movable electromagnetic side depending on whether power is supplied. And a coil for extinguishing. In this case, the control unit Allows the braking operation shaft to rotate in the braking direction by cutting off the power transmitted to the braking operation electromagnetic valve to move both brakes to the braking position, and to drive the braking release motor during emergency release to brake the braking operation shaft. The brakes are rotated in the release direction so that both brakes are released. Meanwhile, power is supplied to the brake operation electromagnetic valve to prevent rotation of the brake operation shaft to maintain the brake release state.

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the present invention. 4 is a perspective view of an elevator rope braking apparatus according to the present invention, Figure 5 is an exploded perspective view of FIG.

As shown in these drawings, the elevator rope braking device 1 according to the present invention, the fixed frame 10 to form a component installation space, and is installed in the fixed frame 10 to brake the rope 5 and The brake 20 has a brake 20 for releasing braking and a brake operating part 30 for braking the brake 20 in an abnormal driving state of the car 4 and releasing the brake 20 when the car 4 is in a normal state. .

The fixed frame 10 includes a pair of side plates 11 spaced apart from each other in parallel to each other, and a first fixing plate 13 and a second fixed plate spaced apart from each other in parallel to cross a central area of both side plates 11. A flat cross section of the form II having (15) is produced in the form. The space in the center of the fixed frame 10 and the outer spaces of the first fixing plate 13 and the second fixing plate 15 are formed as component installation spaces.

An installation frame (17 in FIGS. 7A and 7B) for installing the braking device in an area adjacent to the rope 5 of the elevator 3 is coupled to both sides of the lower side plate 11 of the fixed frame 10. The mounting frame 17 may be integrally formed with both side plates 11.

The first fixing plate 13 is disposed adjacent to the rope 5 so as to be parallel to the longitudinal direction of the rope 5. The upper and lower left and right (refer to Fig. 5) of the first fixing plate 13 is formed with an arm lever through hole 13a in the long hole in the vertical direction. The pivot support arm 39 and the arm pressing lever 43, which will be described later, pass through the arm lever passage opening 13a. In the region between the arm lever passage openings 13a on the upper and lower sides of the rear surface of the first fixing plate 13, a lever engaging portion 13b to which the arm pressing lever 43, which will be described later, is rotatably coupled is formed. Arm lever lever 43, which will be described later, is rotatably coupled to the lever engaging portion 13b.

The second fixing plate 15 is coupled to the side plate 11 so as to be spaced apart and parallel to the first fixing plate 13. On both sides of the central region of the second fixing plate 15, a pair of crank passage holes 15a for passing the working crank 65 to be described later are formed.

The brake 20 is fixed brake 21 coupled to the front surface of the first fixing plate 13 and the fixed brake 21 simultaneously approaching and spaced apart from the fixed brake 21 with the rope 5 interposed therebetween. It has a movable brake 23 which is movable up and down in the longitudinal direction of the rope 5 while maintaining parallel to the.

On the plate surface of the fixed brake 21, a rope contact groove 21a in contact with the rope 5 is formed in the vertical direction. As shown in the drawing, the fixed brake 21 may be made of a single piece that is manufactured in the form of a brake pad and is directly fixed to the first fixing plate 13, and a separate brake fixing plate to which the brake pad and the brake pad are fixed. It may be configured to be coupled to the first fixing plate 13.

The movable brake 23 has a movable plate 25 that is approached and spaced apart from the fixed brake 21, and a brake pad 27 that is coupled to the plate surface of the movable plate 25 facing the rope 5.

On the upper, lower, left, and right four plate surfaces of the movable plate 25, an arm passage hole 25a of a long hole is formed so that the pivoting support arm 39, which will be described later, passes, and the movable plate adjacent to each of the arm passage holes 25a ( On the rear surface (opposite side of the brake pad 27 engaging surface), a hinge engaging portion 25b is formed in which one end of the pivot support arm 39 is rotatably coupled. In addition, a rope braking groove 27a is formed on the plate surface of the brake pad 27 along the longitudinal direction in the vertical direction.

The brake operation unit 30 includes a brake operation unit 31 for operating the movable brake 23 and a parallel holding unit for allowing the movable brake 23 to approach and space apart while maintaining parallelism with respect to the fixed brake 21. 41 and drive means 50 for driving the brake action unit 31.

The brake action unit 31 has an operating plate 33 for reciprocating a space between the first and second fixing plates 13 and 15 of the fixed frame 10 and a guide shaft for reciprocating the operating plate 33. And a rotation support arm 39 which connects the operation plate 33 and the movable brake 23 and supports the movable brake 23 to be rotatable.

On the front of the operation plate 33, hinge coupling portions 33a are formed at four positions in the upper, lower, left, and right directions so that the rear ends of the rotation support arms 39 are rotatably coupled. Then, crank hinge coupling portions 33b are formed at one end of the operation crank 65, which will be described later, on the left and right sides of the rear center region of the operation plate 33 so as to be rotatable. In addition, a plunger through hole 33c is formed in each of the central regions (ie, one region of the crank hinge coupling portion) in the width direction of the operation plate 33, and the crank hinge coupling portion 33b of the operation plate 33 is formed. On the upper and lower plate surfaces, guide pipe coupling holes 33e for coupling the shaft guide pipe 33d through which the guide shaft 35 passes are formed. (In the drawing, the guide shaft 35 is inserted into the shaft guide tube 33d)

The guide shaft 35 is provided with four corresponding to the shaft guide pipe 33d of the operation plate 33. Both ends of the guide shaft 35 are fixed to the first and second fixing plates 13 and 15 in a state of penetrating the shaft guide pipe 33d. Thereby, the operation plate 33 can be reciprocated so as to approach and space apart in parallel with the first fixing plate 13 along the guide shaft 35. Here, four guide shafts 35 are provided, but may be provided in a single or a plurality of pairs depending on the size and manufacturing conditions of the braking device.

Rotating support arms 39 are provided at four positions in the top, bottom, left and right sides of the operation plate 33 and the movable brake 23. The pivotal support arm 39 has a pivotal coupling portion 39a, 39b formed at both ends thereof in the state of passing through the arm lever passage hole 13a of the first fixing plate 13, respectively, for the operation plate 33 and the movable plate. It is rotatably coupled to the hinge coupling portions 33a and 25b of the brake 23.

As a result, the movable brake 23 is approached and spaced apart from the fixed brake 21 in accordance with the reciprocating movement of the operating plate 33 while being movable up and down while maintaining parallel to the operating plate 33. In addition, the movable brake 23 is approached and spaced in parallel to the fixed brake 21, and the movable brake 23 is rotated up and down in parallel while approaching the fixed brake 21, so that the movable brake 23 is flat in the longitudinal direction of the rope 5. It is mobile. Here, the pivot support arm 39 is provided in four, but may be provided in a plurality of pairs or more depending on the size and manufacturing conditions of the braking device.

The parallel holding unit 41 has an arm press lever 43 for horizontally maintaining the rotation support arm 39 in a direction orthogonal to the fixed brake 21, and a pressure plunger for elastically pressing the arm press lever 43 ( 45 and a plunger spring 47 which elastically pressurizes the pressure plunger 45.

Arm pressing lever 43 has a shape bent in the opposite direction so that the front and rear ends contact the pivot support arm 39 and the pressure plunger 45, respectively, the rear end region is the lever coupling of the first fixing plate 13 It is connected to the part 13b so that rotation is possible. The arm pressing levers 43 are provided in pairs on both sides in the width direction of the first fixing plate 13 so as to correspond to the pivot support arms 39.

The pressurizing plunger 45 has a rear end fixed to the plunger engaging opening 15c formed in the central region on both sides in the width direction of the second fixing plate 15, and the front end passing through the plunger passage opening 33c of the operation plate 33. It has a plunger cylinder 45a and an operation plunger 45b which is coupled to the plunger cylinder 45a so as to be movable back and forth and contacts the rear end of the arm press lever 43. In the front end region of the actuating plunger 45b, a contact portion 45c which is larger in diameter than the outer diameter of the plunger spring 47 is formed.

The plunger spring 47 is disposed between the second fixing plate 15 and the contact portion 45c of the operation plunger 45b in a state surrounding the plunger cylinder 45a. This plunger spring 47 elastically presses the actuating plunger 45b to the arm press lever 43 side.

Here, the parallel holding unit 41 can change the structure thereof in various ways. For example, without using the plunger 45 and the plunger spring 47 may be configured between the one side of the arm pressing lever 43 and the fixed frame 10 via a spring, the rotating support arm (39) It can also comprise only elastic members, such as a spring which directly exerts an elastic force. In addition, the shape and installation position of the arm pressing lever 43 may be variously changed to correspond to the size and manufacturing conditions of the braking device.

The drive means 50 presses the operation plate 33 toward the first fixing plate 13 to remove the brake drive unit 51 and the operation plate 33 which separate the movable brake 23 from the fixed brake 21. Braking spring 55 for elastically pressurizing the fixed plate 15 to move the movable brake 23 to the fixed brake 21, and for driving the brake driving unit 51 to brake the brake 20 in the released state. Control unit (not shown) for controlling the operation of the braking operation unit (53 in FIGS. 7A and 7B) and the braking operation unit 53 for converting the brake 20 into a braking release state. And a limit switching unit (93 in FIGS. 8A to 8D) which detects the approaching and separating state of the fixed brake 21 and the movable brake 23 and transmits them to the braking controller.

The brake drive unit 51 includes a main shaft 61 rotatably installed at the rear of the second fixing plate 15, a pair of operation wheels 63 coupled to both sides of the central region of the main shaft 61, and A pair of actuating cranks 65 connecting the actuating wheel 63 and the actuating plate 33 and shocks transmitted to the main shaft 61 through the actuating crank 65 when the actuating direction of the actuating plate 33 moves in the braking direction are cushioned. It consists of a main shaft buffer (69).

The main shaft 61 is installed to cross both side plates 11 of the fixed frame 10 in the rear center region of the second fixing plate 15. At this time, one side of the main shaft 61 is coupled to the first chain gear 61a for interlocking with the braking operation shaft 71 of the braking operation unit 53 to be described later.

The operating wheels 63 are fixedly coupled to both sides of the central region of the main shaft 61 so as to correspond to the crank passage opening 15a formed in the second fixing plate 15. In one region of the two working wheels 63, a crank coupling portion (not shown) which is eccentric with respect to the axis of the main shaft 61 is formed.

The crank hinges of the operating crank 65 and the crank coupling portion (not shown) of the operating wheel 63 are respectively opposite ends of the operating crank 65 while passing through the crank passage opening 15a of the second fixing plate 15. It is coupled to the coupling portion 33b. The operation crank 65 presses the operation plate 33 toward the first fixing plate 13 when the main shaft 61 rotates toward the second fixing plate 15, and the main shaft 61 of the second fixing plate 15 is rotated. When rotating in the opposite direction, the operation plate 33 is pressed toward the second fixing plate 13 side.

The first chain gear 61a is connected by a chain 67b and a second chain gear 71a formed on one side of the braking operation shaft 71 to be described later. The first chain gear 61a, the second chain gear 71a, and the chain 67b rotate in conjunction with the other when one of the main shaft 61 and the braking operation shaft 71 is rotated.

The spindle buffer 69 is formed between the main shaft coupling groove 69a in the long hole formed in both side plates 11 and the spindle buffer member interposed between the second fixing plate 15 and the longitudinal central region of the spindle 61 ( 69b). The main shaft coupling groove 69a is formed by a predetermined length in a direction parallel to the moving direction of the operation plate 33, and the main shaft buffer member 69b is composed of a plurality of washer-shaped leaf springs. This spindle shock absorbing portion (9) buffers the impact applied to the spindle (61) by allowing the spindle (61) to be able to flow slightly by the length of the spindle coupling groove (69a) and buffer the shock in the spindle shock absorbing member (69b) .

Here, the braking releasing unit 51 may be configured by coupling the plurality of operating wheels 63 and the plurality of operating cranks 65 to the plurality of main shafts 61 according to the size, structure, and manufacturing conditions of the braking device.

The braking springs 55 are provided in four and are installed to surround the four guide shafts 35 in the region between the operation plate 33 and the first fixing plate 13. The braking spring 55 is a compression coil spring that generates an elastic force in the expansion direction to move the movable brake 23 toward the stationary brake 21 by elastically pressing the operation plate 33 toward the second fixing plate 15. Here, the number of installation of the braking spring 55 can also be variously changed.

On the other hand, the braking operation unit 53 is a braking operation shaft 71 for interlocking the main shaft 61, a motor assembly 73 for rotating the braking operation shaft 71 in the braking release direction, and a braking operation shaft 71 ) Has a braking operation solenoid valve (75) to keep it from rotating at the braking release position or to allow the braking operation shaft (71) to be rotated to the braking position in an emergency.

The braking operation shaft 71 is horizontally installed above or below the main shaft 61, and both ends thereof extend outwardly of both side plates. One side of the braking operation shaft 71 is coupled with a first chain gear 61a of the main shaft 61 and a second chain gear 71a connected by a chain 67b. Accordingly, when the braking operation shaft 71 rotates, the main shaft 61 is driven by the rotational force transmitted from the second chain gear 71a to the first chain gear 61a through the chain 67b. Rotate with.

The motor assembly 73 has a brake release motor 81 for rotating the braking operation shaft 71 in the braking release direction, and a clutch 82 for connecting and disconnecting the braking release motor 81 and the braking operation shaft 71. Has The motor assembly 73 is installed on the outside of the side plate adjacent to one end of the braking operation shaft 71. To this end, the brake release motor 81 is supported and coupled to the outside of the side plate, and at the same time, the clutch 82 is installed. The support member 84 which forms the space is combined.

The braking release motor 81 is provided as a deceleration motor for gradually rotating the braking operation shaft 71 in the braking release direction. The rotary shaft of the brake release motor 81 is coupled to the rotary cam plate 86 of the clutch 82 to be described later.

The clutch 82 is coupled to the fixed cam plate 85 coupled to both inner walls of the clutch installation space of the support member 84 so as to be spaced apart from each other, and the rotation shaft of the brake releasing motor 81 between the fixed cam plate 85. The braking operation shaft 71 between the rotating cam plate 86, the cam shaft 87 that moves at both ends along the camp profile groove 85a of the fixed cam plate 85, which will be described later, and the fixed cam plate 85. It is coupled to one end of the clutch drive cam 88 for moving the cam shaft 87 includes.

The camp profile grooves 85a for forming the movement paths of the cam shafts 87 are formed in a closed loop on inner surfaces of the two fixed cam plates 85 that face each other. As shown in Fig. 6, the camp profile groove 85a includes a braking release profile section 85b for rotating the cam shaft 87 in a state locked by the clutch drive cam 88, and the cam shaft 87 clutches. And a braking profile section 85d having a profile top dead center 85c which is in a state of being released from the drive cam 88.

The central portion of the rotary cam plate 86 is coupled to the rotating shaft of the braking releasing motor 81, and a cam shaft through hole 86a having a long hole is formed on the radial side of the rotary cam plate 86 in the transverse direction with respect to the axis line. . The length of the camshaft through hole 86a corresponds to the difference between the profile top dead center 85c of the braking profile section 85d of the fixed cam plate 85 camp profile groove 85a and the braking release profile section 85b. .

The cam shaft 87 is installed in such a manner that both ends thereof are inserted into the camp profile grooves 85a of the fixed cam plate 85 while penetrating the cam shaft through hole 86a of the rotary cam plate 86. The camshaft 87 rotates along the camp profile groove 85a during the rotation of the rotary cam plate 86.

The central portion of the clutch drive cam 88 is coupled to the braking operation shaft 71, and the cam shaft engaging portion 88a protruding outward is formed in one region of the peripheral end of the clutch drive cam 88. When the cam shaft 87 that rotates along the camp profile groove 85a in accordance with the rotation of the rotary cam plate 86 rotates in the braking release profile section 85b, the cam shaft engaging portion 88a of the clutch driving cam 88 is rotated. By locking, the rotational force of the brake releasing motor 81 is transmitted to the braking operation shaft 71. As a result, the braking operation shaft 71 rotates in the braking release direction. When the camshaft 87 is located at the braking profile section 85d, the camshaft 87 is released from the camshaft engaging portion 88a, so that the rotational force of the braking release motor 81 is transmitted to the braking operation shaft 71. It doesn't work. As a result, the braking operation shaft 71 does not rotate.

The braking operation electromagnetic side 75 accommodates a fixed electromagnetic side 95 which is installed on the outside of the side plate adjacent to the other end of the braking operation shaft 71 and a fixed electromagnetic side 95 to be described later in a coil accommodation space (not shown). And coupled to the other end of the electromagnetic coil 97 and the braking operation shaft 71 to form a magnetic field according to a power supply, and attached to and detached from the fixed electromagnetic side 95 according to the presence or absence of a magnetic field in the electromagnetic coil 97. It has a movable electromagnetic valve 99.

The fixed electron side 95 is formed in a cylindrical shape of an open metal material on one side, and is fixed to the side plate, and an inner central region is formed as a coil accommodation space (not shown). In addition, a shaft through hole 95b is formed in the center of the fixed electromagnetic side 95 so that the other end of the braking operation shaft 71 is rotatably passed. A stopper locking portion 95c corresponding to the stopper protrusion 99c of the is formed.

The electromagnetic coil 97 generates a magnetic field by power transmitted from an external power supply unit (not shown) to magnetize the fixed electron side 95 and the movable electron side 99. Accordingly, when power is applied to the electromagnetic coil 97, magnetism is generated between the fixed electron side 95 and the movable electron side 99 by the magnetic field, thereby strongly sticking to each other. In addition, when the power supply to the electromagnetic coil 97 is cut off, the magnetism disappears between the fixed electron side 95 and the movable electron side 99 due to the disappearance of the magnetic field, thereby separating each other.

The movable electromagnetic valve 99 is formed in the shape of a disk fixedly coupled to the other end of the braking operation shaft 71 at the open side of the fixed electromagnetic valve 95, and the stopper engaging portion 95c of the fixed electromagnetic valve 95 is formed at the peripheral end thereof. The stopper protrusion 99c which hangs on () is formed. The movable electromagnetic valve 99 is strongly applied to the fixed electromagnetic valve 95 by magnetic force when the power is applied to the electromagnetic coil 97 to prevent the braking operation shaft 71 from rotating, and the power applied to the electromagnetic coil 97. When this is blocked, it is spaced apart from the fixed electromagnetic valve 95 to allow rotation of the braking operation shaft 71. Here, the stopper protrusion 99c is caught by the stopper engaging portion 95c of the fixed electromagnetic side 95 in a state where the movable electromagnetic side 99 is stuck to the fixed electromagnetic side 95 so that the movable electromagnetic side 99 may be caused by a poor power supply. By preventing the movement of the braking operation shaft 71 to prevent any rotation.

The controller (not shown) cuts off power transmitted to the braking operation electronic valve 75 in an emergency or power failure, and drives the braking release motor 81 during an emergency release.

That is, the control unit (not shown) may transmit the abnormal driving signal of the car 4 of the elevator 3 or cut off the power transmitted to the braking operation electromagnetic valve 75 in case of power failure so that the braking operation shaft 71 may rotate in the braking direction. Allow the brake to provide instantaneous access to the fixed brake. Thereby, the rope 5 can be braked.

The controller (not shown) drives the braking release motor 81 to rotate the braking operation shaft 71 in the braking release direction during emergency release and power failure release. As a result, the movable brake is spaced apart from the fixed brake to release the braking state of the rope 5.

The limit switching unit 93 is an eccentric cam 93a coupled to the main shaft 61 and a limit switch 93b which is turned on / off in accordance with the rotation of the eccentric cam 93a in contact with the top dead center of the eccentric cam 93a. Has

The eccentric cam 93a has its top dead center turned on the limit switch 93b in a state where the operation plate 33 is moved toward the first fixing plate 13 (a state in which the fixed brake 21 and the movable brake 23 are separated from each other). When the operating plate 33 is moved toward the second fixing plate 15 (the state where the fixed brake 21 and the movable brake 23 are mutually approached), the top dead center of the limit switch 93b is turned on. It will be turned off.

The limit switch 93b transmits an on / off signal to the controller (not shown) of the elevator 3 according to the position of the eccentric cam 93a. That is, the controller (not shown) checks the braking and releasing state of the car 4 of the elevator 3 according to the on / off signal transmitted from the limit switch 93b.

By this configuration, looking at the operation of the elevator rope braking device (1) according to the present invention.

First, when the car 4 of the elevator 3 operates normally, as shown in FIGS. 7A and 8A, the operation plate 33 maintains a brake release state approached toward the first fixing plate 13. At this time, the braking spring 55 maintains a compressed state between the operation plate 33 and the first fixing plate 13, and power is supplied to the braking operation electromagnetic valve 75 so that the movable electromagnetic valve 99 and the fixed electromagnetic valve 95 are provided. ) Strongly adheres to the magnetic force, preventing rotation of the braking operation shaft 71. In addition, the eccentric cam 93a coupled to the main shaft 61 maintains a position where the top dead center turns on the limit switch 93b. In addition, the movable brake 23 is maintained in parallel with the fixed brake 21 by the parallel holding unit 41 which holds the rotation support arm 39 horizontally.

In this state, when the car 4 of the elevator 3 rises or falls, or stops at the destination floor and slips, or if a power failure occurs, the controller (not shown) detects and brakes the abnormal operation. Shut off the power delivered to the operation electronic valve (75). Then, the magnetic force is dissipated between the movable electromagnetic valve 99 and the fixed electromagnetic valve 95 to allow the movable electromagnetic valve 99 to rotate from the fixed electromagnetic valve 95 so that the braking operation shaft 71 is rotated in the braking direction (unlocking). )do. At this time, the braking operation shaft 71 is a state in which the cam shaft 87 of the clutch 82 is located in the braking profile section 85d and is released from the cam shaft engaging portion 88a, and the braking operation shaft 71 and the braking operation shaft 71 are braked. The connection with the rotating shaft of the release motor 81 is released. Thereby, the braking operation shaft 71 can rotate rapidly in the braking releasing direction without resistance of the braking releasing motor 81.

When the braking operation electromagnetic valve 75 is in the unlocked state, as shown in FIGS. 7B and 8B, the operating plate 33 is momentarily moved toward the second fixing plate 15 by the elastic expansion force of the braking spring 55. The movable brake 23 connected by the arm 39 approaches the fixed brake 21 to brake the rope 5.

At this time, the operation plate 33 moves toward the second fixing plate 15 to push the operation crank 65 of the brake release unit 51 so that the operation wheel 63 is rotated in the opposite direction of the second fixing plate 15. In accordance with the rotation of the operating wheel 63, the main shaft 61 also rotates in the opposite direction (the braking release direction) of the second fixing plate 15. When the main shaft 61 rotates in the braking release direction, the eccentric cam 93a of the limit switching unit 93 coupled to the main shaft 61 is rotated to a position at which the limit switch 93b is turned off. The off signal of the limit switch 93b is transmitted to a controller (not shown) of the elevator 3 to confirm that the elevator 3 is in an emergency braking state.

In the braking state of the rope 5 in which the movable brake 23 and the fixed brake 21 are approached, the wear of the brake 20 or the rope 20 due to the load and the falling speed of the car 4 or the counter waiter of the elevator 3 ( Slip of the rope 5 may occur due to the extra additional fall caused by lubricating material or the like buried in 5). Then, as shown in FIGS. 8C and 8D, the movable brake 23 moves toward the fixed brake 21 while maximally moving in the longitudinal direction of the rope 5 by the frictional force between the rope 5 and the brake 20 to maximize the braking force. Let's go. This is possible because the movable brake 23 is supported by the pivot support arm 39 so as to be rotatable in parallel with the actuation plate 33.

That is, when the movable brake 23 holding the fixed brake 21 and the approaching state by the pressing force of the braking spring 55 moves in a plane direction in the longitudinal direction of the rope 5 by the frictional force with the rope 5, it rotates. As the support arm 39 rotates, the angle between the fixed brake 21 is narrowed, and when the angle between the rotation support arm 39 and the fixed brake 21 narrows, the movable brake 23 naturally fixes the fixed brake 21. Approach more to maximize the braking force.

As a result, overloading of either the car 4 or the counterweight 8 may occur, and excessive friction between the rope 5 and the lining may occur, thereby reducing the braking force even if the wear of the brake 20 occurs significantly. .

Then, after the primary braking of the vehicle 3 of the elevator 3, the moving brake 23 which momentarily approaches the fixed brake 21 by the movable brake 23 at the time of an abnormal driving (up and down falling and sliding) or a power failure, the movable brake 23 Since the secondary braking occurs while moving in a planar movement in the longitudinal direction of the rope 5 with respect to the fixed brake 21, it is possible to minimize the shock of the occupant by preventing sudden braking of the car (4).

In addition, even when the braking device 1 is left for a long time and the elastic strength of the braking spring 55 is lowered when it is operated, the movable brake 23 moves toward the fixed brake 21 while moving in the plane of the rope 5 in the longitudinal direction. Therefore, the braking force of the brake 20 may be reduced due to the change in the elastic strength of the braking spring 55.

On the other hand, when safety measures such as rescue of the occupant and troubleshooting of the elevator 3 are completed in the braking state of the rope 5 according to abnormal operation and power failure of the car 3, the controller (not shown) The braking release motor 81 is driven to release the braking state of the movable brake 23 and the fixed brake 21.

When the brake releasing motor 81 is driven, the rotating cam plate 86 of the clutch 82 rotates to move the cam shaft 87 located in the braking profile section 85d along the camp profile surface of the fixed cam plate 85. . Then, the cam shaft 87 moves from the braking profile section 85d to the braking release profile section 85b, thereby engaging the cam shaft engaging portion 88a of the clutch driving cam 88, thereby rotating the clutch driving cam 88. Accordingly, the braking operation shaft 71 connected to the clutch driving cam 88 rotates in the braking release direction.

When the braking operation shaft 71 rotates in the braking release direction, the second chain gear 71a and the chain 67b coupled to the braking operation shaft 71 are driven to provide rotational force to the first chain gear of the main shaft 61 ( By transmitting to 61a), the main shaft 61 is rotated in the braking release direction. then,

When the main shaft 61 rotates in the brake release direction, the operation crank 65 coupled to the operation wheel 63 pushes the operation plate 33 toward the first fixing plate 13. When the operation plate 33 is pushed to the first fixing plate 13, the braking state of the rope 5 is released while the movable brake 23 is spaced apart from the fixed brake 21. At this time, the pressing plunger 45 of the parallel holding unit 41 presses the arm pressing lever 43 by the pressing force of the plunger spring to horizontally hold the pivoting support arm 39 so that the movable brake 23 is fixed. Space apart while keeping parallel to (21). In addition, in the parallel holding unit 41, the movable brake 23 is fixed brake 21 even when the movable brake 23 is planarly moved to one side in the longitudinal direction of the rope 5 as shown in FIGS. 7C and 7D. Space apart while keeping parallel to. Here, the distance between the movable brake 23 and the fixed brake 21 is such that the eccentric cam 93a of the limit switching unit 93 provided on the main shaft 61 turns on the limit switch 93b. The on signal of the limit switch 93b is transmitted to a controller (not shown) of the elevator 3 to confirm that the elevator 3 is in a brake release state.

When the brake and the fixed brake are spaced apart from each other, the controller (not shown) supplies power to the braking operation electromagnetic valve 75 so that the movable electromagnetic valve 99 generates a magnetic force between the fixed electromagnetic valves 95. Then, the movable electromagnetic valve 99 is strongly attached to the fixed electromagnetic valve 95 to prevent the braking operation shaft 71 from rotating. As a result, the braking releasing state is maintained.

At this time, the braking spring 55 provided between the operation plate 33 and the first fixing plate 13 is compressed. In addition, since the eccentric cam 93a of the limit switching unit 93 coupled to the main shaft 61 is a position at which the limit switch 93b is turned on, the controller (not shown) of the elevator 3 is the elevator 3. It can be confirmed that the emergency braking is released.

If abnormal operation of the car 3 in the elevator 3 occurs again in the brake release state, the braking process as described above is performed.

On the other hand, Figure 8 is a side cross-sectional view of the rope brake device for an elevator according to another embodiment of the present invention. As shown in this figure, the elevator rope braking device 1 'according to the present embodiment is an installation position of the motor assembly 73' with the elevator rope braking device 1 of Figs. Except for the same configuration.

In the elevator braking device 1 ′ according to the present embodiment, the motor assembly 73 ′ is installed on an upper portion of the fixed frame 10. At this time, the driving force of the brake releasing motor 81 'is applied to the braking operation shaft 71' through the first gear 77 coupled to the clutch 82 'and the clutch driving cam 88' of the clutch 82 '. It is transmitted to the combined second gear 78 to rotate the braking operation shaft 71 'in the braking release direction. The rest of the configuration and the braking and braking release operation is the same as the above-described elevator rope braking device (1), detailed description thereof will be omitted.

As such, it can be appreciated that the rope braking device for an elevator according to the present invention can be variously changed in the installation position of the motor assembly according to the installation conditions such as the installation position and the installation space.

On the other hand, Figure 9 is a rear view of the elevator rope braking apparatus according to another embodiment of the present invention. As shown in this figure, unlike the elevator rope braking apparatuses 1 described above, the elevator rope braking apparatus 1 "according to the present embodiment has a motor assembly 73" and a braking operation electromagnetic valve 75 ". It is provided so that it may respectively connect to the both ends of the main side 61 ". This is because when the shock transmitted to the main shaft during braking operation of the brake is weak and it is not necessary to configure the main shaft buffer unit 69 as in the above-mentioned elevator rope braking device 1, the braking operation with the motor assembly 73 "is performed. The embodiment shows that the electron side 75 "can be directly connected to the main shaft 61".

According to this embodiment, the structure of the elevator rope braking device can be simply configured.

As described above, the elevator rope brake device according to the present invention automatically releases the movable brake and the fixed brake by the motor drive, and maintains the brake release state by the braking operation electromagnetic valve, thereby safely and easily the movable brake and the fixed brake. It can release the rope braking state by spaced apart, it is possible to maintain a stable state of the rope braking release.

In addition, since the brake is braked even during a power failure, an accident due to abnormal operation of the elevator during a power failure can be prevented in advance.

As described above, according to the present invention, it is possible to release the braking state by separating the movable brake and the fixed brake safely and automatically by automatically performing the braking release operation, and the rope for the elevator capable of stably maintaining the rope braking release state. A braking device is provided.

Claims (5)

A fixed frame having opposite sidewalls spaced apart from each other, a fixed brake fixed adjacent to a rope between both sidewalls of one side of the fixed frame, a movable brake approaching and spaced apart from the fixed brake with the rope interposed therebetween, An actuating plate connected to the movable brake, the braking spring for elastically pressurizing the actuating plate to a braking position to which both brakes approach, and the actuating plate being spaced apart from the both brakes in a fixed frame. An elevator rope braking device having a driving means for moving to a braking release position or locking and unlocking a moved state, The driving means A brake drive unit having a main shaft having both ends rotatably installed on both side walls at the other side of the fixed frame, and at least one working crank having both ends eccentrically coupled to one region of the main shaft and the other end coupled to the operation plate. and; A motor assembly for rotating the main shaft so that the actuating crank presses the actuating plate so that the two brakes are spaced apart from the braking release position; A braking operation electronic valve which prevents or permits the main shaft to rotate in the braking direction depending on the power supply, thereby allowing the brake release position of both brakes to be maintained or approach the braking position; Maintains a brake release state of both brakes during normal operation of the elevator, and brakes both brakes during abnormal operation of the elevator, and separates both brakes to a brake release position when normal operation is possible in the abnormal operation state. And a control unit for controlling driving of the braking operation electronic valve and the motor assembly. The method of claim 1, The region adjacent to the main shaft is provided with braking operation shafts, the both sides of which are rotatably coupled to both side walls of the fixed frame, and the main axis and the braking operation shaft are interlocked and rotated by a chain. Chain gears are respectively coupled; And said motor assembly and said braking operation electromagnetic valve are connected to both ends of said braking operation shaft, respectively. The method of claim 2, The motor assembly is A braking release motor for rotating the braking operation shaft in a braking release direction; And a clutch for disconnecting the braking release motor and the braking operation shaft when both brakes approach the braking position and connecting the braking release motor and the braking operation shaft when the two brakes are spaced apart from the braking release position. Rope braking device for elevators. The method of claim 2, The braking operation electronic valve A fixed electronic edge installed at a fixed frame adjacent to one end of the braking operation shaft; A movable electromagnetic valve coupled to the other end of the braking operation shaft, An elevator rope braking apparatus having a coil for forming and dissipating a magnetic field between the fixed electromagnetic side and the movable electromagnetic side according to the presence or absence of power supply. The method according to any one of claims 1 to 4, The control unit In case of an emergency, the brake power is transmitted to the braking operation electromagnetic valve to allow the braking operation axis to rotate in the braking direction to move both brakes to the braking position. During the emergency release, the brake release motor is driven to rotate the braking operation shaft in the braking release direction so that both brakes are released. Meanwhile, power is supplied to the braking operation electromagnetic valve to prevent rotation of the braking operation shaft to prevent the braking operation. Elevator rope braking device, characterized in that to maintain the release state.