KR100682039B1 - Two way rope brake for elevator - Google Patents

Abstract

The present invention relates to a two-way rope brake for an elevator, the present invention includes a bracket fixed on the elevator structure; A lower lining holder coupled to the bracket and having a lower lining coupled to an upper surface thereof; A spring support for interposing a spring and pressurizing or releasing the spring by hydraulic pressure; A pair of wedge-shaped sliders rotatably connected to the spring support, the lower portion of which has an upper lining coupled to press the main rope of the elevator; And a pair of side covers coupled vertically to both sides of the lower lining holder, respectively, for sliding the pair of wedge-shaped sliders in a corresponding inclined direction on both sides with respect to the main rope. As the pressure is moved by both directions, the pair of sliders move along the guide grooves of the pair of side covers to gradually narrow the gap between the upper and lower linings, thereby braking the elevator as the main rope is gripped. do.

Description

Two Direction of Rope brake for Elevator}

1 is a perspective view of a rope brake according to the prior art,

2 is a perspective view of another rope brake according to the prior art,

Figure 3 is a cross-sectional view of the hydraulic rope brake patent applicant filed.

Figure 4 is an assembled perspective view of the spring-type rope brake patent applicant filed.

5 is an assembled perspective view of an elevator two-way rope brake according to the present invention,

6 is a cross-sectional view of the two-way rope brake for an elevator according to the present invention,

7 is a conceptual view of the operation of the elevator for explaining the principle of the operation of the elevator rope brake according to the present invention.

* Description of Signs for Main Parts in Drawings *

101: cylinder 102: cylinder axis

103 and 105: guide shaft 107: nut

108, 109: bracket 110a, 110b: hinge shaft

111, 113: spring support 115: spring

121, 123: Sliders 131, 133: Side cover

136: guide grooves 141, 143: upper lining

145: lower lining 147: lower lining holder

151, 153: upper lining fixing plate 155: lower lining fixing plate

161, 163: bolt 165: opening

170: fastening hole

The present invention relates to a rope brake for an elevator, and more particularly, to improve safety by holding a wedge-shaped sliding member in both directions to grip a rope, and to use a spring inexpensive pressure additional element to produce a production cost. It relates to a two-way rope brake for the elevator can be reduced.

Usually, devices such as elevators and cranes are operated by cables or ropes. In the case of elevators in particular, they are supported by a rope moving by a drive pulley and balanced by counterweights on the opposite rope. In general, counterweights function to reduce the force required for the operation of the elevator and to form friction against the pulley.

If the rate of change of speed is increased beyond the predetermined range, the elevator should be braked as necessary for safety and accident prevention. Therefore, the importance of the brake system has become more and more important, and mandatory braking system is mandated by the law on elevator safety.

However, due to unstable braking components or uneven wear such as linings, the cost of elevator maintenance increases, as well as the inconvenience of frequent maintenance for users. Injuries have always existed.

Therefore, a braking device has been disclosed that increases the service life by applying a uniform braking force to the lining. US Patent No. 5,228,540, registered July 20, 1993 (Invention: Elevator car braking device for operating the shoe with a spring) car brake with shoes actuated by springs).

In the description of the US Patent No. 5,228,540, hydraulic pressure is normally introduced into the cylinder 1 through the hose 1a to compress the springs 2 and 3, and the links 5, 6) interacts with the springs 2, 3 to move the cam follower 7 to the lower ends of the cam faces 8a, 8b so that the springs 2, 3 are connected to the solenoid 9 when the door is opened. Is released, and finally, the shoe 4 is brought into close contact with the rope R through the reverse process to brake the elevator. In this case, strictly speaking, it is the lining attached to the shoe 4 that closely adheres to the rope.

In addition, in the prior art, when the lining is worn, the cam follower 7 moves above the cam surfaces 8a and 8b to move the shoe 4 closer to the rope R, so that the rope R as a lining in an emergency. The braking of the elevator is disclosed by bringing it into close contact.

However, in the related art, the cam follower 7 and the cam faces 8a and 8b are used to apply a uniform force (pressure) to the lining, and the springs 2 and 3 are used as the power source. However, there is a disadvantage in that the cost is increased due to the complexity of braking the elevator, and furthermore, the uniform force is not substantially applied to the lining, and the maintenance of the elevator is increased due to frequent replacement of the spring.

In addition, Fig. 2 discloses another braking device of the prior art (Utility Model Registration No. 20-0221450).

According to still another prior art shown in FIG. 2, the hydraulic cylinder 10 is operated by the operation of the hydraulic generator to push the movable plate 11 in a state where the plunger 10a of the front end is in close contact with the movable plate 11. (11) is fixed to the fixed plate 14, while both ends slide along the connecting member 12 to move away from the support plate 13, against the resilience of the spring spring 15 between the fixed plate 14 and the movable plate 11 ) Close to the side. The plurality of ropes R disposed between the close and movable plates 11 and the fixed plate 14 are tightly fitted by the linings 11a and 14a, respectively, to maintain a stationary state.

However, in the case of the prior art of FIG. 2, the elevator is suddenly stopped because pressure is applied to the rope moving the movable plate 11 by the plunger 10a in a perpendicular direction, and the maintenance is increased due to frequent replacement of the linings 11a and 11a. And above all, there are always shortcomings that can cause injury to people due to sudden stops.

In addition, Figure 3 is a patent application (10-2003-0083499) filed by the applicant of November 24, 2003, a rope brake for braking the elevator by selectively gripping the elevator main rope, a wedge-shaped slider ( 20, a housing 21 for slidably embedding the slider 20 and guiding the moving direction of the slider 20, and the slider 20 beveled at a predetermined angle with respect to the main rope R. A cylinder 22 for pressing and moving in a direction, and a bracket 23 for fixedly mounting the housing 21 on an elevator structure, and the slider 20 is pressed by the cylinder 22 to move. As the distance between the pair of linings (not shown) interposed between the main ropes R in the housing 21 is gradually narrowed, the main ropes R are gripped by a pair of linings. Became Characterized in that the copper.

According to the rope rope for the elevator filed previously, the performance and safety is excellent, but there is a disadvantage that the price competitiveness is low as the expensive manufacturing cost of the cylinder 22 is used.

Meanwhile, FIG. 4 is a patent application filed by the applicant of October 1, 2004 (10-2004-0078131), which is a rope brake replacing the hydraulic force of the model of FIG. 3 with the force of the spring S, and a rope (R). By applying gradual pressure equally to the entire lining (31,33), it is a technology to extend the life of the lining (31,33), reduce the braking distance and reduce the manufacturing cost. However, in the prior art, there is a problem in that the braking force is weak when the elevator descends to the unidirectional wedge type.

The present invention is to solve the problems as described above, an object of the present invention, by operating the wedge-shaped sliding member in both directions to improve the safety by gripping the rope, and the pressure additional element spring price is cheaper To provide a two-way rope brake for elevators that can reduce the production cost.

In order to achieve the above object, the present invention provides an elevator rope brake for braking the elevator by selectively gripping the main rope of the elevator, comprising: a bracket fixed on the elevator structure; A lower lining holder coupled to the bracket and having a lower lining coupled to an upper surface thereof; A spring support for interposing a spring and pressurizing or releasing the spring by hydraulic pressure; A pair of wedge-shaped sliders rotatably connected to the spring support, the lower portion of which has an upper lining coupled to press the main rope of the elevator; And a pair of side covers coupled vertically to both sides of the lower lining holder, respectively, for sliding the pair of wedge-shaped sliders in a corresponding inclined direction on both sides with respect to the main rope. As the pressure is moved by both directions, the pair of sliders move along the guide grooves of the pair of side covers to gradually narrow the gap between the upper and lower linings, thereby braking the elevator as the main rope is gripped. It provides a two-way rope brake for a two-way elevator.

Furthermore, when the pressing force of the spring against the spring support and the pair of sliders is released, the spring support and the slider may further include a cylinder for returning to the initial position.

The upper and lower linings may also be provided with plate-like fixing portions on opposite surfaces, respectively. Furthermore, the upper and lower linings are preferably bolted to the pair of sliders and the lower linings, respectively.

In addition, the cylinder is preferably operated hydraulically.

In addition, the bracket is formed with an arc-shaped opening, each of the lower lining fixing portion is arranged in the form of 2-3 through-holes for the coupling with the bracket in the lower end of the lower lining, according to the position where the bracket is fixed The housing is capable of angle adjustment within the range of 45 ° to 90 ° about the lower lining coupling bolt with respect to the bracket.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the rope brake device is mounted on the elevator according to the present invention.

Figure 5 is a perspective view showing a state of assembling the elevator rope brake according to the present invention, Figure 6 is a cross-sectional view of the elevator rope brake according to the present invention, Figure 7 is a conceptual view of the operation of the elevator with a rope brake of the present invention. As to explain the principle that the elevator rope brake of the present invention to act.

In the bidirectional rope brake for an elevator according to the present invention, as shown in FIGS. 5 and 6, the brackets 108 and 109 are fastened to a fixed plate (not shown) at any position where the main rope R connected to the elevator is easily braked. It is fixedly installed by means. The fastening means is preferably a bolt, but may be fixed by riveting or welding.

In addition, the present invention is fastened to the fixing plate, that is, fixed to the fixing plate (not shown) which is an elevator structure through the brackets 108, 109, the lower lining fixing portion that the lower lining 145 is fixed on the bracket (108, 109) 155 is combined.

The brackets 108 and 109 are each formed with an arc-shaped opening 165, and the through-holes 170 for engaging with the brackets 108 and 109 are arc-shaped at the lower end of the lower lining fixing part 147. Two to three formations are arranged. In this case, according to the position where the brackets 108 and 109 are fixed, the rope brake of the present invention is angled in the range of 45 ° to 90 ° with respect to the bracket 108 and 109 about the lower lining coupling bolt 163. Adjustable

Accordingly, the portions engaged with the brackets 108 and 109 and the lower lining holder 147 act on the coaxial line in the direction of the force by braking.

In addition, the lower lining holder 147 and the brackets 108, 109 are coupled to each other by bolts 161, 163. Although two bolts 161 and 163 are shown in the present embodiment, it is usually preferable to use two to three bolts.

The cylinder 101 is fastened to the spring supports 111 and 113, and the return cylinder 101 is mounted at the center of the spring supports 111 and 113 to stably position the spring supports 111 and 113 in place. It was.

Since the spring supports 111 and 113 and the cylinder 101 must withstand the compressive force of the spring 115 in general, it is preferable to design and reinforce the shape through stress analysis. In addition, since the guide grooves (not shown) of the side covers 131 and 133 are subjected to a force when the sliders 121 and 123 are braked or returned, it is preferable to consider reinforcement.

In addition, the spring support (111, 113) is fixed to the spring 115 and transmits a force at the same time is connected to the pair of hinge shafts (110a, 110b) to guide the movement of the slider (121, 123).

The spring 115 may preferably be equipped with various types of compression force of the spring with the required load for each person from 11 people to 24 people according to the number of people allowed in the elevator. This prevents sudden braking by using a spring with high compression force at low loads and prevents increase of free distance by using a spring with low compression force at high loads.

In addition, the sliders 121 and 123 may be manufactured to be combined with the upper linings 141 and 143 and the lower lining 145 because the sliders 121 and 123 transmit the force required for braking at an angle.

Furthermore, the upper linings 141 and 143 and the lower linings 145 require replacement every time, so that bolts can be fastened to the sliders 121 and 123 and the upper lining fixing plates 151 and 153 for ease of replacement. It is preferable. The same applies to the lower lining 145 as well.

The cylinder 101, which is operated at the time of return, is fastened to the nut 14 by the cylinder shaft 102 passing through the spring supports 111 and 113. When the hydraulic pressure is injected, the nut 107 coupled to the cylinder shaft 102 is pulled back by pulling the spring supports 111 and 113, so that the nut 107 and the cylinder shaft 102 need to be reinforced. In addition, the return through the guide shafts (103, 105) can be prevented from returning unbalanced.

Hereinafter, the braking and braking time of the elevator through the bidirectional rope brake of the present invention configured as described above will be described as follows.

1. When braking the elevator

First, when the elevator is out of a predetermined range of speed, that is, when the speed exceeds a certain threshold or the speed change amount is large, the hydraulic pressure is released to the hydraulic cylinder 101 under the control of a control device (not shown), and the spring 115 is released. The spring supports 111 and 113 receive elastic force and move along a pair of spring guide shafts 103 and 105.

Accordingly, pressure is applied to the pair of sliders 121 and 123 that couple the pair of upper linings 141 and 143, and the pressure is distributed between the angled pressure and the vertical pressure. It is used as a motion source for moving in the angular direction and the latter acts as a vertical motion source for the slider. Moreover, since the sliders 121 and 123 have a certain angle, for example, a tilt of 35 °, analyzing the force linearly causes the slider to operate very finely and gradually so that the elevator can be safely braked without a big impact.

Accordingly, the sliders 121 and 123 connected to the spring supports 111 and 113 move toward the lower lining fixing part 147 along the guide grooves of the side covers 131 and 133.

The upper linings 141 and 143 then apply pressure in a progressive fashion to the main rope R disposed between the upper linings 141 and 143 and the lower lining 145, thereby delivering a sudden pressure to the main rope R. Safely brakes the elevator while reducing frequent wear of the upper linings 141 and 143 and lower lining 145 that may occur. Therefore, the elevator is prevented from injuring the occupant as it is braked through the gradual stop as described above.

This gradually stopping elevator does not have a long braking time because the brakes are momentarily applied several times like ABS (air brake system) than when one brake is applied during the brake operation of the vehicle. The braking distance can be reduced and it is more safe for the driver.

In this case, the release of the hydraulic cylinder 101 through a control device (not shown) is not only speed, but also configured to release the hydraulic cylinder 101 for braking even at the time of departure or departure of the elevator or other emergency situation. Do.

2. When lifting elevator brake

The pressure is applied to the sliders 121 and 123 by the springs 115 so that the main rope R is braked due to the close contact between the upper linings 141 and 143 and the lower lining 145, and is eventually connected to the main rope R. The elevator is braked, and when the emergency is released, the signal is sent from the control device (not shown) to the hydraulic device (not shown) so that the fluid flows into the cylinder 101, and the cylinder shaft 102 springs. As the supports 111 and 113 are pulled back to their original positions, the braking of the elevator is released while the pressing force applied to the main rope R is released.

Although the present invention has been described with reference to the elevator by way of example, it can be extended to all brake devices corresponding thereto. The braking device of the present invention has been described in detail with reference to the accompanying drawings. However, it will be apparent to those skilled in the art that the present invention may be modified and implemented within the scope and equivalents of the claims set forth below.

As described above, according to the present invention, by using a wedge-shaped sliding member having a predetermined angle in both directions, it is possible to apply a gradual pressure to the rope in an emergency and to improve the braking force by applying a uniform force to the lining as a whole. At the same time there is an advantage that can reduce the injury of the human body due to the sudden stop of the elevator.

In addition, by changing the rope brake from the existing one-way wedge structure to the two-way wedge structure, the braking force can be released in any direction of elevator up and down, maximizing convenience in installation, repair, and parts replacement, safety and technical characteristics, Increased productivity can be achieved while increasing convenience.

Claims (6)

An elevator rope brake for braking an elevator by selectively gripping an elevator main rope, A bracket fixed on the elevator structure; A lower lining holder coupled to the bracket and having a lower lining coupled to an upper surface thereof; A spring support for interposing a spring and pressurizing or releasing the spring by hydraulic pressure; A pair of wedge-shaped sliders rotatably connected to the spring support, the lower portion of which has an upper lining coupled to press the main rope of the elevator; And And a pair of side covers coupled vertically to both sides of the lower lining holder, respectively, for sliding the pair of wedge-shaped sliders in a corresponding inclined direction on both sides with respect to the main rope. As the spring support is pressurized by the spring and moved in both directions, the pair of sliders move along the guide grooves of the pair of side covers to gradually narrow the gap between the upper and lower linings, thereby holding the main rope and the elevator. Two-way rope brake for two-way elevator, characterized in that for braking. The elevator two-way rope brake according to claim 1, wherein when the braking of the elevator is released, a return hydraulic cylinder coupled to the spring support pulls the spring support to return the spring support and the slider to the position before braking. . The two-way rope brake for an elevator according to claim 1 or 2, wherein the upper and lower linings each have a plate-shaped fixing part on an opposite surface.  The two-way rope brake for an elevator according to claim 1 or 2, wherein the upper and lower linings are bolted to the pair of sliders and the lower lining fixing units, respectively. delete According to claim 1, wherein each of the brackets is formed with an arc-shaped opening, the bottom of the lower lining fixing portion is arranged in the form of two to three through holes for engagement with the bracket in an arc shape, the bracket is fixed According to the position of the two-way rope brake for the elevator characterized in that the angle can be adjusted within the range of 45 ° to 90 ° with respect to the lower lining coupling bolt with respect to the bracket.

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