KR20020031650A - Brake system for rope of elevator - Google Patents

Abstract

PURPOSE: A rope brake for an elevator is provided to overcome the instantaneous momentum when a rope of an elevator is braked and to promptly brake the abnormal movement of the rope. CONSTITUTION: Protruded portions(11a) are formed on both ends of housings(11). The housings spaces apart from each other. A power transmitting unit(21) consists of a drive gear(27) interlocking with a motor(23) and a driven gear(29) interlocked by the drive gear. The driven gear drives a crank shaft(35) and embeds a rotor including a backward rotation preventing ratchet. An operation starting unit(31) consists of a detonation lever(34) having a latch(34a) detonated by a solenoid valve(33), the crank shaft connected to both ends of a cam rotation shaft(36a) having an eccentric cam(36), and a spring support bar fixing shaft(38a). A fixing plate(43) is installed aside the housing protrusions. According to the firm structure of the housings and fixing plate, the strong load applied to the fixing plate is supported. Since an elevator rope is braked by the instantaneous rebounding force of the spring, the rope is braked promptly.

Description

Rope Braking System for Elevators {BRAKE SYSTEM FOR ROPE OF ELEVATOR}

The present invention relates to a braking device for an elevator rope, and more particularly, to reduce the frictional force of the towing rope and the sheave in a stationary state and to gradually slide over the braking device or to move the elevator faster than the normal speed. In the event of normal braking and by the spring's elasticity, the movable plate installed with the brake lining is operated to clamp / lock the elevator traction rope in an instant, so that the safety of the elevator can be prevented. It was intended to be.

In general, elevators that move passengers or cargo while vertically raising and lowering high-rise buildings are connected to ropes driven by a motor, and the elevators are moved up and down, and these elevators are guided by guide rails on both sides of the elevator. The shoes are lifted and lowered without flow.

In addition, in the elevator as described above, due to the frictional force between the towing rope and the hoisting pulley or the weight difference between the elevator car and the balance weight, when the elevator stops on the target floor, slippage occurs at the moment when the passenger gets on or off, or a sudden rise and fall above the specified speed. In order to prepare for the case, the safety device of the hoisting motor and the brake device by various limit switches are provided to prevent the occurrence of the safety accident of the elevator.

However, conventionally developed emergency braking devices are mainly used to control the abnormal operation of the elevator by restraining the guide rail for guiding the elevator to a wedge-shaped jaw (jaw), such an emergency braking device is speeded by the Gavarner When detecting, the gavarer switch cuts off the power of the motor, and furthermore, the wedge-type emergency braking device that binds the gaverner rope stops by stopping the guide rail, so that the elevator operates only when the descent exceeds the normal speed. In the case of slipping at a low speed and a sudden rise exceeding the normal speed there was a problem that can not effectively brake the rope.

In order to solve this problem, Patent Application No. 97-71595 proposed a new type of rope braking device for an elevator (see Fig. 1). The invention and the hydraulic generating unit is operated by receiving a signal from the control unit of the elevator; A reaction force portion including a hydraulic cylinder (S) and a connecting member (13`) penetrated / installed on the support plate while the spring is installed in the support plate; A fixing plate 43` through which the connecting member penetrates, with both ends fixed to the housing; It is fixed to the end of the connecting member is composed of a movable plate 45` to move forward and backward against a plurality of springs to the fixed plate side, it is possible to lock or release the elevator rope (3`) in accordance with the operation of the reaction force. .

However, since the above invention has a structure in which all the brake loads are transmitted to the fixed plate 43 'because the elevator rope is braked by the movement of the support plate and the movable plate 45', when a large load is momentarily applied. The problem that the fixed plate does not sufficiently support the overload and the relatively high cost of the hydraulic system has been raised. In addition, the present invention has a disadvantage that the required time from the operation time of the movable plate 45` braking the rope of the elevator to the completion of braking is relatively unsatisfactory.

The present invention has been made to solve the problems of the conventional emergency braking device of the elevator as described above and the problem in the patent application No. 97-71595, the moment occurs when braking the normal or abnormal movement of the elevator rope It is an object of the present invention to provide an emergency braking device for an elevator rope with a more robust structure for a housing and a fixed plate so as to sufficiently cope with a large load.

In addition, an object of the present invention is to provide a mechanical braking device capable of braking an abnormal movement of an elevator rope relatively quickly.

In order to achieve the above object, the braking device of the present invention is installed on a rope side on which an elevator is installed or on a rope side on which a balance weight is installed, among the ropes caught by a hoisting pulley of a machine room equipped with a hoist, both housings being perpendicular to both ends inwardly. It is a section that is symmetrically spaced apart from each other by forming a bent protrusion, which is fixed to both housing fixing parts on the outside thereof, a cam rotating shaft connected to the crankshaft at the upper side and a support rod fixing shaft at the bottom are respectively installed at the inside of the protrusion, the protrusions The other outer fixed plate and the slidable movable plate inside the housing are penetrated and supported by the rectangular connecting members, respectively, characterized in that it is composed of a power transmission unit, an operation start unit and a locking unit, respectively.

1 is a perspective view showing a conventional braking device,

Figure 2a, 2b is a schematic diagram showing the installation state of the braking device of the present invention,

3A and 3B are perspective views showing an open / closed state of the braking device of the present invention, and FIGS. 4A and 4B are partial plan views showing the operation of the movable plate of the present invention;

5A, 5B and 5C are partial side views illustrating the cocking lever and the drive gear of the present invention;

6A and 6B are perspective views showing linings attached and installed to the stationary plate and the movable plate of the present invention, respectively.

<Description of the symbols for the main parts of the drawings>

1: elevator 3: rope

11: housing 13: connecting member

15: spring 21: power train

23: motor 25: reducer

27: drive gear 27a: reverse rotation prevention rotor

27b: ratchet

29: Driven Gear 31: Operation Start

33: solenoid valve 34: trigger lever

34a: Batch 35: Crankshaft

35a: Clamp 36: Eccentric Cam

36a: cam rotation shaft 37: ball spring

38: spring support rod 38a: support rod fixing shaft

41: locking portion 43: fixed plate

45: movable plate 43a, 45a: lining

43b, 45b: Needle locking groove 45c: Protrusion

Hereinafter, described in detail by the accompanying drawings of the present invention.

2a, 2b and 3a, 3b is a perspective view of a braking device according to an embodiment of the present invention, the power transmission unit in the housing, the operation start unit operated by the power transmission unit, both ends are fixed to the housing A rope operated by receiving a signal from the controller of the elevator to brake the rope side on which the elevator is installed or the rope side on which the counterweight is installed among the ropes caught by the hoisting pulley in the machine room equipped with the hoisting machine, including a locking part including a fixed plate and a movable plate moving forward and backward. In the braking device,

Both housings 11 are sections which are symmetrically spaced apart from each other by forming the protrusions 11a by bending at both ends at right angles inwardly; The power transmission unit 21 is driven by the motor 23, the drive gear 27 and the drive gear 27 is interlocked by the drive the crankshaft 35, the reverse rotation preventing ratchet (29b) A driven gear 29 containing a rotor 29a having; The actuation start portion 31 is a crank shaft in which a locking lever 34 provided with a latch 34a, which is triggered by the solenoid valve 33, and a cam rotation shaft 36a having an eccentric cam 36, are connected to both ends thereof. And a spring support rod fixing shaft 38a.

FIG. 5B is a side view showing the triggering lever 34 'according to another embodiment of the present invention, and a male latch 34'a is formed at the triggering lever 34' of the operation start unit 31. The crankshaft 35 is provided with a female pawl 35a that is opened and closed at the center thereof with a male pawl 34'a.

5C is a partial perspective view showing a power transmission unit according to another embodiment of the present invention, wherein the power transmission unit 21 is a drive chain gear 27 'linked with a motor 23 and the drive chain gear ( And a driven chain gear 29 'which is driven by a chain 36a' connected to the 27 'and drives the crankshaft 35'.

According to another embodiment of the present invention, the anti-rotation rotor 29a and the ratchet 29a of the power transmission unit 21 are installed in the drive gear 27 instead of the driven gear 29.

3A and 6, the power transmission unit 21 which is operated by receiving a signal from the controller of the elevator 1 includes a drive gear 27 that is interlocked by receiving power from the motor 23 and the reducer 25. , Driven gear 27 driven by the drive gear 27 and driving the crankshaft 35 and having a larger size than the drive gear 27 including a rotor 29a having a reverse rotation preventing ratchet 29b; 29).

The operation start unit 31 is a trigger lever 34 is provided with a latch (34a) is triggered by the repulsive force of the bullet spring 37 by the solenoid valve 33 in response to a signal by the controller of the elevator (1), and It is opened and closed with the latch 34a to be in the unlocked / locked state, and a rotation shaft 36a having an eccentric cam 36 is composed of a crank shaft 35 connected to both ends thereof, and a spring support rod 38 and a fixed shaft 38a. Thus, the crank shaft 35 and the support rod 38, the fixed shaft 38a is configured to be rotatably connected at the contact point by a spring support rod 38 composed of a plurality of telescoping (telescoping) action. The telescoping action of the fixed shaft 38a means that the telescope or radio antenna acts as if it is pulled out and folded.

The number of installation of the spring support rods 38 on which the carbon spring 37 is mounted on the outer periphery can be increased or decreased, and does not specify the number of support rods 38.

The locking portion 31 is a movable plate protrusion 45c in which the eccentric cam 36 of the cam rotation shaft 36a constituting the operation start portion 31 is in close contact with one side in a state of being fixed and installed in the housing 11. It consists of a movable plate 45 having a fixed plate 43 is connected to a plurality of connecting members 27 installed on the one side of the housing projection (11a) / fixed, the fixing plate 43 shown in Figure 3a As shown in the drawing, a lining 43a having a plurality of concave locking grooves 43b to which the rope 3 is in contact with the front surface is attached and installed, and the movable plate 35 has a front surface as shown in FIG. 3B. A lining 45a having a plurality of concave locking grooves 45b to which the rope 3 is in contact is attached and provided.

Referring to Figures 3a, 3b and 4a, 4b the operational state and effect of the present invention described above are as follows. The braking device (A) of the present invention can be used auxiliary in preparation for the normal operation or emergency of the elevator, first, the operation during braking during normal operation will be described.

First, as shown in FIGS. 3A and 4A, when the elevator 1 stops in the normal running state, as shown in FIGS. 3B and 4B, the solenoid valve 33 of the operation start unit 31 is operated. When the trigger lever 34 is triggered, the clamp 34a and the crankshaft 35 are released, and the spring support 37 is shot and the spring support rod 38 connected to the crankshaft 35 and the support rod fixing shaft 38a. The crank shaft 35 is rotated while being pulled out, and the eccentric cam 36 of the cam rotation shaft 36a connected to the crank shaft 35 acts to move the movable plate protrusion 45c in close contact with the cam 36. Pushed. Even if the crankshaft 35 rotates, the driven gear 29 does not reversely rotate the motor 23 due to the ratchet 29b which prevents the reverse rotation (see FIG. 6).

That is, in the state in which the ballistic spring 37 is compressed so that the elevator 1 can operate, driven by the operation of the crankshaft 35 which reciprocates the highest point and the lowest point according to the compression and expansion of the ballistic spring 37. The gear 29 rotates, and thus the drive gear 27 and the motor 23 interlock with each other. However, by the limit switch in the compressed state of the ball spring 37 (that is, the driving state of the elevator 1). The drive gear 27 and the driven gear 29 are reversed by the reverse rotation of the motor 23 in advance. As the driven gear 29 rotates in reverse, the spring 29c at the bottom of the ratchet 29b is pressed so that the ratchet 29b coincides with the circumferential surface of the rotor 29a so that the ratchet 29b is formed with the groove 29d. It is not caught. Accordingly, when the crankshaft 35 rotates (that is, in the case of the operation of braking the rope 3), the cam rotation shaft 36a and the anti-rotation rotor 29a reversely rotate, but the driven gear 29 Since it is rewound in advance by an angle that does not reverse rotation in conjunction with the rotor 29a, the rotation of the crank shaft 35 is not affected. In other words, even if the crankshaft 35 is reversed due to the shot of the shot spring 37, the driven gear 29 is ratcheted by the shot of the spring 29c by the ratchet 29b and the driven gear groove 29d. The driving gear 27 and the motor 23 are reversely rotated in advance by the positions 29b protruding and engaging with each other, so that the cam rotation shaft 36a and the reverse rotational rotor 29a are Will be idle. The reverse rotation prevention rotor 29a and the ratchet 29b may be installed in the driven gear.

As the cam 36 presses the movable plate protruding portion 45a, the movable plate 45 slides along the connecting member 13 so that both ends thereof move toward the fixed plate 43 and the fixed plate 43 and the movable plate. It is in close contact with the fixing plate 43 side while opposing the spring 15 between 45.

The plurality of ropes 3 located between the close contact movable plate 45 and the fixed plate 43 are locked by the linings 43a and 45a, that is, the indentation locking grooves 43b and 45a of the linings 43a and 45a. 45b) is firmly clamped to maintain a stationary state.

In this state, when the elevator 1 moves up and down by button operation, the power transmission unit 21 is first driven by a signal from the controller of the elevator 1 in order to put the rope 3 in the locked state into the unlocked state. Motor 23 of the motor 23 operates, the speed reducer 25 decelerates the rotational speed of the motor 23 and transmits its power to the drive gear 27 to drive the driven gear 29. The mechanism at this time is made by operating in the opposite direction to the operation of the anti-rotation rotor 29a described above. That is, when the drive gear 27 is interlocked with the rotation of the motor 23, and the driven gear 29 rotates, the spring 29c when the groove 29d and the ratchet 29b of the driven gear 29 coincide with each other. ), The ratchet 29b protrudes while being engaged with the groove 29d, thereby rotating the driven gear 29, whereby the driven gear 29 and the crankshaft 35 interlock with each other.

The speed of the motor 23 is decelerated at an appropriate speed by the size difference between the reduction gear 25 and the drive 27 / driven gear 29 to rotate the cam rotation shaft 36a connected to the driven gear 29. Then, the crankshaft 35 connected to the cam rotation shaft 36a rotates downward while rotating. As a result, the spring support rod 38 is folded, and the crankshaft 35 is caught by the catching lever 34a of the cocking lever 34 while the ball spring 37 is compressed. When the compression of the ball spring 37 is completed, the motor 23 rotates backward by the limit switch to cause the spur gear 27 and the driven gear 29 to rotate in reverse, and the groove 29d and the anti-rotation rotor ( By mismatching the ratchet 29b) of 29a), the motor 23 and the drive gear 27 due to the next shot of the shot spring 37 are prevented from rotating in reverse.

As the ball spring 37 is contracted, the movable plate 35 is fixed to the movable plate 35 while the spring 15 seated on the connecting member 13 is stretched between the movable plate 45 and the fixed plate 43. The movable plate 35 is fixed to the stationary plate 33 again because the rope 3 that has been squeezed / capped by the linings 33a and 35a and is locked away is placed in the unlocked state as shown in FIGS. 3A and 4A. Until it moves to the side it is possible to maintain the unlocking state for the rope (3) so that the elevator (1) enters the operating state, that is, the lifting and lowering possible state.

The elevator (1) braking device (A) of the present invention is not only in the normal operating state, but also in an emergency, that is, the elevator is due to the lowering of the braking force of the elevator operating braking device or the reduction of the friction between the towing rope and hoist pulley or the weight difference between the elevator car and the balance weight. After stopping at the floor, the elevator 1 can be braked even when slipping occurs at the moment when the passenger gets on or off, or when it rises and falls above the specified speed. Referring to this mechanism, the control unit of the elevator 1 sends a signal to the solenoid valve 33, and when the trigger lever 34 is triggered as described above, the latch 34a and the crankshaft 35 are released, and the bullet spring is released. The spring support rod 38 connected to the crank shaft 35 and the support rod fixing shaft 38a is pulled out to rotate the crank shaft 35, and the cam rotation shaft 36a connected to the crank shaft 35 is connected to the crank shaft 35. As the eccentric cam 36 acts to push the movable plate protruding portion 45c in close contact with the cam 36, the movable plate 45 is moved / pressurized toward the stationary plate 43 so that the rope 3 is in the unlocked state. ) To the locked state and the elevator (1) is securely timed. At this time, the mechanism of the motor 23 and the anti-rotation rotor 29a is as described above.

At this time, the lining 45a having a plurality of rope contact concave locking locking grooves 45b is formed on the side of the fixed plate 43 of the movable plate 45 constituting the locking portion 41, and the fixed plate 43 is trapezoidal in the longitudinal direction on the front surface. Linings 33a having a plurality of cross-sectional recessed locking grooves 43b are attached / installed, respectively, and the wedges are in the state where the rope 3 is sandwiched between the recessed locking grooves 43b and 45b of both linings 43a and 45a. Due to the effect, it is possible to maintain the locked state more reliably.

Referring to the operation of the cocking lever 34 'according to another embodiment of the present invention shown in Figure 5b as follows.

When the elevator 1 is stopped in the normal or emergency state, when the trigger lever 34 is triggered by the solenoid valve 33, the female latch of the male latch 34a and the crankshaft 35 is triggered. As the 35a is released, the shot spring 37 is shot to press the movable plate 45 by the cam 36 to lock the rope 3. The other mechanism is the same as that of the above-mentioned embodiment.

Referring to the operation of the power transmission unit 21 according to another embodiment of the present invention shown in Figure 5c as follows.

In order to put the elevator 1 in the unlocked state, the motor 23 and the speed reducer 25 of the power transmission unit 21 operate in response to a signal from the controller to drive the drive chain gear 27 '. 36a ') rotates to drive the driven chain gear 29'. Accordingly, the cam rotation shaft 36a connected to the driven chain gear 29 'is turned, and then the crank shaft 35 connected to the cam rotation shaft rotates downward. Accordingly, the spring support rod 38 is folded, the ball spring 37 is compressed, the crankshaft 35 or the crankshaft clasp 35a is a latch 34a or cocking lever 34 'of the cocking lever 34. ) Is caught by the clasp 34'a, and the ball spring 37 is in a compressed state.

When the elevator 1 stops in a normal or emergency state, the chain 36a 'is configured as a normal bicycle chain, and the driven chain gear 29' idles, thereby preventing reverse rotation of the motor 23. .

Other mechanisms are the same as those of the above-described embodiment.

The configuration of the braking device according to the combination of the embodiments of the present invention described above does not depart from the claims of the present invention.

As described above, the present invention provides a braking device for a more robust elevator rope having a structure of a housing and a fixed plate in order to sufficiently cope with a large load applied to an instantaneous fixed plate generated when braking an abnormal movement of the elevator rope. It is effective in providing an effective and low cost braking device.

In addition, the present invention braking the elevator rope by the instantaneous repulsive force of the mechanical spring has a relatively fast, mechanical braking device to eliminate the risk of operation errors by providing a more reliable braking device have.

Claims (4)

A locking portion comprising a power transmission portion in the housing, an operation start portion operated by the power transmission portion, and a fixed plate fixed at both ends to the housing and a movable plate moving forward and backward, are caught in the hoisting pulley of the machine room equipped with a hoist. In the rope braking device that is operated by receiving a signal from the controller of the elevator to brake the rope side of the rope is installed, or the rope side is equipped with a balancing weight, Both housings 11 are sections which are symmetrically spaced apart from each other by forming the protrusions 11a by bending at both ends at right angles inwardly; The power transmission unit 21 is driven by the motor 23, the drive gear 27 and the drive gear 27 is interlocked by the drive the crankshaft 35, the reverse rotation preventing ratchet (29b) A driven gear 29 containing a rotor 29a having; The actuation start portion 31 is a crank shaft in which a locking lever 34 provided with a latch 34a, which is triggered by the solenoid valve 33, and a cam rotation shaft 36a having an eccentric cam 36, are connected to both ends thereof. An elevator rope braking device, characterized in that consisting of (35) and the spring support rod fixing shaft (38a). The method of claim 1, A male latch 34'a is formed on the trigger lever 34 of the operation start unit 31, and the crank shaft 35 is opened and closed with a male latch 34'a at its center. Rope brake device for an elevator, characterized in that the arm latch (35a) is installed. The method according to claim 1 or 2, The power transmission unit 21 is interlocked by a drive chain gear 27 'that is interlocked by a motor 23 and a chain 36a' connected to the drive chain gear 27 ', and the crank shaft 35 Elevator rope braking device, characterized in that consisting of a driven chain gear (29 ') to drive. The method according to claim 1 or 2, An anti-rotation rotor (29a) and a ratchet (29b) of the power transmission unit (21) driven gear (29) are installed on the drive gear (27).