KR200304581Y1 - a sub-braking machine for an elevator - Google Patents

Abstract

The present invention relates to a braking device for a rope type elevator, and more particularly, an accumulator in which a working fluid is compressed and stored at a predetermined pressure, a solenoid valve connected to the accumulator, and the accumulator and the solenoid valve are operated. A hydraulic unit composed of a control unit to make it; A movable part formed of a housing in which a piston rod having a first brake pad at the front end is slid inward and a fluid transfer path through which a working fluid for operating the piston rod flows; A fixing part having a second brake pad opposed to the first brake pad and a wire rope disposed between the first brake pad and the wire rope, the structure being much simpler and smaller in size than a conventional auxiliary braking device, thereby maintaining the manufacturing cost and The maintenance and installation area can be reduced, and the braking means and wire rope can be installed to be parallel to each other during the installation process, thereby increasing braking force and extending the service life of the device.

Description

Auxiliary Braking System for Elevators {a sub-braking machine for an elevator}

The present invention relates to a brake device of an elevator, and more particularly, a plurality of brake pads pinch the wire rope when the car is speeding up or opening, starting from the wire rope separately from the normal braking means. The present invention relates to an auxiliary braking device for an elevator capable of assuring safety of a passenger by braking.

In general, as shown in FIG. 10, the elevator 130 is a box-shaped car carrying a person or cargo, and a traction machine 110 'for lifting the car 130' up and down. ), A guide rail 120 'for guiding the car 130', and a counterweight moving relative to the weight of the car 130 'to reduce the load of the hoist 110'. weight 140 ', the car 130' and the counterweight 140 'are connected to a wire rope 100' that is applied to the rotating wheel of the hoist 110 '.

Therefore, the force to move to either side is generated by the weight difference between the counterweight 140 'and the car 130'.

On the other hand, the hoist has a brake system composed of an electric motor, an electromagnet, a spring, a brake shoe and a brake drum.

That is, when the elevator is running, the electric motor rotates and moves while the brake shoe is opened by the control device of the elevator. When the elevator is stopped, the brake shoe is held in close contact with the drum and a pressure is applied with a spring to maintain the stop state.

At this time, the braking force of the elevator is not directly applied to the wire rope, and the final braking force is generated by the static friction force between the rope and the pulley.

Therefore, when an abnormality of the brake system (for example, a spring abnormality or a rise of the brake shoe) occurs or an abnormality (for example, wear of the pulley) occurs between the rope and the pulley, a problem arises that the elevator becomes incapable of stopping.

In addition, the current elevator control system is highly electronic. If the control system causes an abnormality, abnormal operation (for example, starting without the door of the elevator closed, overspeed, etc.) may occur, which may cause an accident.

Therefore, it is prescribed that an emergency safety brake device and an overspeed governor operate independently of the brake system mounted on the hoist in preparation for an abnormality of the brake system.

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 with a wedge-shaped jaw, such emergency braking device is a speed detection gabor by the governor The n-switch shuts off the motor, and the wedge-type emergency braking system, which restrains the governor rope, restrains the guide rail.

However, the emergency braking device as described above operates only when the elevator descends in excess of the normal speed, and slips at a low speed in a stop state, and there is a problem in that the rope cannot be effectively braked during a sudden rise in excess of the normal speed.

Therefore, in recent years, an emergency braking device having a brake pad operated by the spring force compressed by the pumping unit has been proposed. However, since the structure is complicated and the pumping unit must be separately provided, the manufacturing cost is high, so the burden of purchase and maintenance is high. This increased, and also because the size is large, occupies a large area of installation and the installation cost is increased.

In addition, in the emergency braking device, the brake pad and the wire rope must be kept in parallel during the operation standby, so that the front surface of the brake pad clamps the wire rope at the same time during braking to obtain a sufficient braking effect. Since the separation distance and the inclination angle between the wire ropes are set, the wear accuracy of the brake pads is reduced due to the inaccuracy of the wire rope, which causes a problem of lowering the braking effect.

The present invention has been devised to solve the problems of the prior art, and because the structure is compact and compact, the manufacturing cost, maintenance and installation area can be reduced, and the braking means and the wire rope can be installed at the correct angle to increase braking force. The purpose of the present invention is to provide an auxiliary braking device for an elevator that can be used as well as to extend its service life.

1 is an exploded perspective view of the auxiliary braking device of the elevator according to the present invention

Figure 2 is a perspective view of the auxiliary braking device of the elevator according to the present invention

Figure 3a and Figure 3b is a cross-sectional view schematically showing the configuration of the fluid transport path of the auxiliary braking device of the elevator according to the present invention

Figure 4 is a schematic view showing the configuration of the auxiliary braking device of the elevator according to the present invention

5a and 5b is a cross-sectional view showing the operating state of the auxiliary braking device of the elevator according to the present invention

6A, 6B, and 6C are cross-sectional views schematically illustrating a process of setting a separation distance of a brake pad by operating a setting bolt in the present invention.

Figure 7 is a side cross-sectional view showing an embodiment of the guide member in the present invention

Figure 8 is a side view schematically showing the state of use of the auxiliary braking device of the elevator according to the present invention

Figure 9 is a side view showing an embodiment in which the angle is adjusted when the installation of the auxiliary braking device of the elevator according to the present invention

Figure 10 is a schematic side view showing the basic configuration of the rope elevator

Explanation of symbols on the main parts of the drawings

2: housing 4: accumulator

5: Fixing bolt 6: Inlet solenoid valve

7: setting bolt 8: discharge solenoid valve

10: oil drip 21: indentation

22: leakage passage 23, 320: coupling hole

24: cylinder groove 25: outlet

26: charging port 27: inlet

28; Fluid Conduit 29: Center Hole

30: piston rod 32: support plate

40: first brake pad 50: guide ring

60: second brake pad 62: bracket

64: fixed plate 65: guide member

100: wire rope 290, 300: O-ring

322 fastener 400: groove

620: first bolt 622: second bolt

624: longevity

The present invention to achieve the above object,

A hydraulic part including an accumulator for compressing and storing the working fluid at a predetermined pressure, a solenoid valve connected to the accumulator, and a control unit for operating the accumulator and the solenoid valve; A movable part formed of a housing in which a piston rod having a first brake pad at the front end is slid inward and a fluid transfer path through which a working fluid for operating the piston rod flows; And a fixing part having the second brake pads opposed to each other with the first brake pads and the wire rope interposed therebetween.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is an exploded perspective view of the auxiliary braking device of the elevator according to the present invention, Figure 2 is a perspective view of the combination of the auxiliary braking device of the elevator according to the present invention, Figures 3a and 3b is an auxiliary braking device of the elevator according to the present invention Figure 4 is a schematic cross-sectional view showing the configuration of the fluid transport path of the configuration of the auxiliary braking device of the elevator according to the present invention, Figures 5a and 5b are views of the auxiliary braking device of the elevator according to the present invention This is a cross section showing the operation status.

The auxiliary braking device (A) of the elevator according to the present invention is largely composed of a hydraulic portion (B), a movable portion (B) and a fixed portion (D).

The hydraulic unit (B) comprises an accumulator (4) storing a working fluid compressed at a constant pressure and flow rate; An inlet solenoid valve 6 installed on the fluid transfer path 28 in communication with the accumulator 4 to control the inflow of the working fluid, and installed on the outlet 25 side for discharging the introduced working fluid again; A discharge solenoid valve 8; A pressure switch (3) for detecting a pressure in the accumulator (4) and indicating a recharging time of the working fluid; It includes a control unit 12 for controlling the operation of the inlet solenoid valve 6 and the discharge solenoid valve 8 receives an operation signal from a sensor (not shown) installed outside, the housing of the movable portion (C) ( 2) It is installed at the rear stage.

In this case, a conventional check valve (not shown) is installed at the front end of the accumulator 4 to prevent a back flow of the working fluid, and at one side of the discharge solenoid valve 8, oil for storing the discharged working fluid. The receiving base 10 is installed.

The detector is installed in the car and the governor or separately installed in the auxiliary braking device to detect the speed ascension or the gate opening start and sends an operation signal to the control unit 12.

The movable portion (C) is fitted so that the piston rod 30, the first brake pad 40 and the support plate 32 are integrally coupled to the front end, can be lifted and lowered to the lower inner cylinder 24, and the outer side thereof. A housing (2) formed with a filling port (26) and a discharge port (25) to which a fluid transfer path (28) to which the hydraulic portion (B) communicates and a hydraulic pump for filling (not shown) are connected; It is fastened to the outer periphery of 2) comprises a plurality of fixing bolts (5) fastened to the lower fixing plate (64).

At this time, the first brake pad 40 has a plurality of grooves 600 in which the wire rope 100 is inserted in the front direction in the longitudinal direction.

In addition, the piston rod 30 is provided with a sealing O-ring 300 on the outer periphery, the working projection portion 31 protrudes in the rear center and the center of the cylinder groove 24 inside the housing 2 and the center of the inner center thereof. Being fitted into the hole 29, the piston rod 30 by pressing the piston rod 30 by the inflow of the working fluid was to be moved up and down.

The housing 2 has the hydraulic portion (B) is attached to the outer center, the coupling hole 23 is formed in the end of the outer peripheral surface is inserted into the fixed bolt 5 of a predetermined length, both sides are inward The curved concave concave portion 21 is formed, the support plate 32 is coupled to the bottom.

In addition, the inside of the housing 2 is formed with a cylinder groove 24 which can flow at a predetermined interval while the piston rod 30 is fitted, the inner projection of the cylinder groove (24) A center hole 29 into which the 31 is inserted is recessed.

In this case, an inlet 27 is formed at one side of the cylinder groove 24 to communicate with the fluid transfer path 28 of the hydraulic portion (B), the center hole 29 is usually in the accumulator (4) The leakage passage 22 for discharging the working fluid leaking in a small amount to the outside is formed in communication.

4A and 4B, a sealing O-ring 290 is provided at an inner circumferential inlet side of the center hole 29, and the operation protrusion 31 has a sealing O-ring 290 at an upper side thereof. ), The round jaw 310 is formed.

That is, when the piston rod 30 is lowered by the working fluid, the operating jaw 310 of the working protrusion 31 is in close contact with the sealing O-ring 290 so that the working fluid flows out into the leak passage 22. It can prevent, and can maintain the down state (the state in which the 1st brake pad clamped the wire rope) of the piston rod 30. FIG.

The support plate 32 has a coupling hole 320 corresponding to the coupling hole 23 of the housing 2 at the end of the outer circumferential surface thereof, and is set at a point corresponding to the recess 21 of the housing 2. A fastening hole 322 capable of fastening (7) is formed, and is fixed to the front surface of the piston rod 30 by screwing in the center thereof.

At this time, the fixing bolt 5 having the guide ring 50 is inserted into the coupling holes 23 and 320 formed in the housing 2 and the support plate 32, and the end of the fixing bolt 5 is fixed to the fixing part D. By being screwed to the fixing plate 64, the housing 2 and the support plate 32 are integrally fixed to each other so as to be spaced apart from the fixing plate 64.

The setting bolt 7 is for setting an appropriate separation distance (about 3 to 4 mm) between the first brake pad 40 and the second brake pad 60. The setting method thereof is as follows.

First, the fixing bolt 5 is fastened to fix the hydraulic part B and the movable part C. Then, the setting bolt 7 is inserted into the fastening hole 322 and then continuously tightened. ), The support plate 32 to which the first brake pad 40 is attached is lifted by the guide ring 50 of the fixing bolt 5 by the rotation of the setting bolt 7.

Therefore, when the most suitable separation distance (about 3 to 4 mm) between the first brake pad 40 and the second brake pad 60 is set, the setting bolt 7 is disassembled and stored separately.

If the set bolts 7 are not dismantled, the first brake pads 40 may be interrupted during the pinching operation so that an accident may occur.

The fixing part D has the same shape as the first brake pad 40 and the second brake pad 60 having a plurality of grooves 600 into which the wire rope 100 is inserted at the rear thereof and the fixing plate 64 fixing the same. And the bracket 62 to which the fixing plate 64 is attached, wherein the first brake pad 40 and the second brake pad 60 are opposed to each other with the wire rope 100 interposed therebetween. Is installed.

The bracket 62 has a through hole 621 formed on one side for the bolt insertion, the long hole 624 is formed in an oblique direction upward of the through hole 621, the fixing plate 64 by the long hole 624 It was possible to adjust the angle of.

That is, the fixing plate 64 is attached by fastening the first bolt 620 to the through hole 621, but loosely loosening the first bolt 620 without completely tightening the second bolt inserted into the long hole 624. The bolt 622 also rotates the fixing plate 64 and its attached members (fixing part (D), movable part (C), hydraulic part (B)) with the second bolt 622 as the rotation axis in a loose state. By adjusting the angle so that the grooves 400 and 600 and the wire rope 100 of the first and second brake pads 40 and 60 are parallel to each other, the first and second bolts 620 and 622 are tightened and fixed. .

In this case, in order to maintain the grooves 400 and 600 and the wire rope 100 of the first and second brake pads 40 and 60 in parallel, a separate guide member 65 may be installed. .

The guide member 65 is installed on the front and rear surfaces of the second brake pad 60, and a guide groove 650 corresponding to the groove 600 of the second brake pad 60 is formed at an upper end thereof. The guide groove 650 is formed to be located higher than the groove 600 by a predetermined height (half length (1.5 mm ~ 2 mm) of the above-described separation distance).

Therefore, when the wire rope 100 is in contact with the guide groove 650 of the guide member 65 placed on the front and rear surfaces of the second brake pad 60, the second brake pad 60 and the wire rope 100 are parallel to each other. Therefore, parallel to the first brake pad 40 coupled to the second brake pad 60 is maintained.

Referring to the operation of the present invention configured as described above are as follows.

When an emergency situation occurs and the operation signal is transmitted from the control unit 12, the inlet solenoid valve 6 is opened while the working fluid in the accumulator 4 enters the housing 2 through the fluid transfer path 28. do.

The drawn working fluid is injected into the cylinder groove 24 through the inlet 27 to pressurize the piston rod 30 so that the piston rod 30 descends, and thus the first brake pad 40 Braking is performed by clamping the wire rope 100 while descending.

On the other hand, in order to recover the lowered piston rod 30 again, the discharge solenoid valve 8 is opened to discharge the working fluid filled in the cylinder groove 24, and then the setting bolt 7 is removed from the support plate 32. After fastening to the fastening hole 322 is reset through the above-described setting method.

In addition, when the working fluid in the accumulator (4) is exhausted above the reference value, the pressure switch (3) detects the change in pressure to operate the alarm to inform the filling time of the working fluid, the filling method of the working fluid After removing the plug blocking the filling hole 26 provided in the housing 2, and then filling the working fluid by fastening the filling hydraulic pump (not shown) to the filling hole 26 fluid transfer path (28) is filled into the accumulator (4).

As described above, the auxiliary braking device of the elevator according to the present invention is much simpler in structure and smaller in size than the conventional auxiliary braking device, thereby reducing manufacturing cost, maintenance and installation area, and also installing process In addition, the braking means and the wire rope can be installed to be exactly parallel to increase the braking force, as well as to provide a useful effect that can extend the service life of the device.

Claims (7)

The first and second brake pads having grooves on the front surface are disposed to face each other with the wire rope interposed therebetween, and the rear end of the first brake pad is provided with a piston rod which is lifted and lowered by hydraulic pressure so that the first and second brake pads are provided by the hydraulic pressure. In the elevator auxiliary braking device for braking the elevator by the second brake pad pinching the wire rope, An accumulator (4) in which the compressed working fluid is stored, an inlet solenoid valve (6) installed on the fluid transfer path (28) in communication with the accumulator (4) and controlling the inflow of the working fluid, A discharge solenoid valve 8 installed at a discharge port 25 side to discharge the fluid again, a pressure switch 3 which detects a pressure in the accumulator 4 and informs a recharging time of the working fluid, and the inlet solenoid A hydraulic part (B) composed of a control unit (12) for controlling the operation of the valve (6) and the discharge solenoid valve (8); A cylinder groove 24 having a predetermined center hole 29 at an inner center portion, a filling port 26 to which a fluid transfer path 28 communicating with the accumulator 4 and a filling hydraulic pump are connected, and the cylinder groove. A housing (2) formed therein with an outlet (25) communicating with (24); A fixing bolt 5 fastened through the outer periphery of the housing 2 and the support plate 32 while being fitted to a predetermined guide ring 50; The hydraulic plate includes a piston rod 30 inserted into the cylinder groove 24 while the support plate 32 having the first brake pads 40 having a plurality of grooves 400 formed on one surface thereof is installed at the front end thereof. Movable part (C) installed at the front end of B) and A fixing plate 64 having a second brake pad 60 having a groove 600 having the same shape as the first brake pad 40 on one side thereof, and a bracket 62 attached to both ends of the fixing plate 64. It is configured to include; a fixed part (D) which is installed to be spaced apart from the movable part (C) by being coupled to the fixing bolt (5) to the fixing plate (64), When the high pressure working fluid flows from the accumulator 4 to pressurize the piston rod 30 in the housing 2, the piston rod 30 and the first brake pad 40 at its front end are lowered to form a wire rope ( An auxiliary braking device for an elevator, characterized in that braking by clamping 100). According to claim 1, The piston rod 30 is provided with a sealing O-ring 300 on the outer periphery, the operation projection portion 31 is inserted into the center hole 29 with the round jaw 310 is formed in the center of one end A) auxiliary braking device of the elevator, characterized in that protruded. According to claim 2, The center hole 29 is provided with a sealing O-ring 290 in contact with the round projection 31 of the actuating projection (31) on the inlet side, the accumulator (4) on one side of the outer peripheral An auxiliary braking device for an elevator, characterized in that the leakage passage 22 for discharging the working fluid leaked in a small amount from the outside to the outside. The guide ring 50 of the fixing bolt 5 is fitted to the coupling hole 320 formed on the outer periphery of the support plate 32 coupled to the housing 2 and the lower portion thereof, An auxiliary braking device for an elevator that allows the support plate 32 and the housing 2 to slide. According to claim 1, wherein both ends of the second brake pad 60, the guide member 65 having a plurality of guide grooves 650 corresponding to the groove 600 is installed vertically to be detachable Auxiliary braking system of elevator. The auxiliary braking apparatus of claim 5, wherein the guide groove (650) is formed 1.5 mm to 2 mm higher than the groove (600) of the second brake pad (60). According to claim 1, At least one or more setting bolts 7 are fastened to the support plate 32, and supporting the lower end of the setting bolt (7) to the fixing plate 64 and the support plate (by tightening and loosening operation) 32) by raising and lowering the auxiliary braking device of the elevator, characterized in that it is possible to adjust the separation distance between the first and second brake pads (40, 60).