KR100727631B1 - Elevator brake for preventing fall of elevator car - Google Patents

Abstract

The present invention relates to an elevator platform fall prevention device for preventing the elevator platform from falling even if the elevator system malfunctions or the elevator wire rope is damaged. The elevator comprising a platform for moving up and down along the elevator path, wherein A platform braking unit fixedly installed to face the outside of the platform; And a chain through which the end is fixed to the ceiling and the bottom of the elevator shaft through the platform brake unit, and when the platform descends by a predetermined speed or more, the platform brake unit is fixed to the chain to be fixedly supported. It is done.

Elevator, Rope Braking, Rope Brake, Fall Prevention, Emergency Braking

Description

Elevator brake fall preventing device {Elevator brake for preventing fall of elevator car}

1 is a block diagram of a general elevator.

Figure 2 is a block diagram of a conventional emergency stop of the elevator platform.

3 is a block diagram of a conventional rope brake for an elevator.

Figure 4 is a block diagram of an elevator platform fall prevention apparatus according to an embodiment of the present invention.

Figure 5a and Figure 5b is an operation state diagram of the elevator platform fall prevention apparatus according to an embodiment of the present invention.

FIG. 6 is a state diagram in which the chain in FIG. 5B acts on the engaging portion; FIG.

Figure 7 is a state attached to the elevator platform fall prevention device according to the present invention.

8 is a block diagram of an elevator platform fall prevention apparatus according to another embodiment of the present invention.

9a and 9b is a state diagram of the operation of the elevator platform fall prevention device shown in FIG.

* Brief description of the main parts of the drawing

1..Elevation Platform 2 ..

3.Wire rope 5.Guide rail

7..Emergency stop device

101..Chain 102..Elevating brake

104..fixed pulley 105..moved pulley

106, 107..Guide pulley 108, 109..Chain guide

110..Hanging part 111 ..

112. Elastic member 113. Elastic member protection

114 .. Release pin 115 .. Locking groove

116, 117, 124, 125..Chain guide groove 118..Chain guide hole

119, 120..Guide Pulley Groove 121..First Auxiliary Pulley

122..Secondary auxiliary pulley 123..Secondary moving ball

127. Rotating shaft 126. Guide pin

121a. 122a..Guide pulley

The present invention relates to an elevator platform fall prevention device, and relates to an elevator platform fall prevention device that prevents the elevator platform from falling down due to malfunction of the mechanical device or falling down due to breakage of the elevator wire rope. .

An elevator is installed in a high-rise building or apartment to move people or cargo, and as shown in FIG. 1, a platform for moving a platform 2 and a platform 2 that is loaded up and down along an elevator path 1 as shown in FIG. 1. Connecting the lifting weight (4), the guide rail (5) for guiding the movement of the lifting platform (2), the counterweight (6), the lifting platform (2) and the counterweight (6), which are installed to reduce the load of the lifting machine (4). And an emergency stop device 7 for forcibly stopping when the wire rope 3, the lifting platform 2 descends abnormally, and the governor 8 for controlling the operation of the emergency stop device 7.

As shown in FIG. 2, the emergency stop device is a wedge (W), a drive breaker (9a), a driven breaker (9b), a hinge shaft (9c), an interlocking link (not shown), and a drive link (9e). , Consisting of a plurality of components such as a rope socket (9f), a damping spring (9g) and the main block (9h), a guide rail for guiding the movement of the platform 2 when the platform 2 is lowered above a certain speed ( By holding 5) strongly, the lowering of the platform 2 is forcibly stopped.

However, as described above, since the elevator emergency stop device stops the platform 2 by holding the guide rail 5 strongly, the friction force is excessively generated between the emergency stop device 7 and the guide rail 5. There was a risk of malfunction.

In addition, the emergency stop device is a wedge (W), drive breaker (9a), driven breaker (9b), hinge shaft (9c), linkage link, drive link (9e), rope socket (9f), damping spring (9g) ) And a main block (9h), such as having a number of components to operate because the configuration is complicated, there was a problem that it is not easy to manufacture each part.

Meanwhile, as shown in FIG. 3, when the platform 2 is lowered at an excessive speed, an elevator emergency stop device which uses the wire rope 3 to stop the platform 2 is used. When a predetermined sudden braking control signal is transmitted to the solenoid valve 11, the solenoid valve 11 is opened so that the oil filled in the cylinder 12 is moved to the oil tank 14 through the supply pipe 13. . At the same time, since the mobile shoe 15 is moved to the fixed shoe 16 side, the wire rope 3 is in close contact with the inside of the locking grooves 15a and 16a formed in the mobile shoe 15 and the fixed shoe 16, respectively. Will brake.

By the way, the above-described elevator emergency stop device because the wire rope (3) is to emergency stop the platform 2 by holding the wire rope (3) strongly when the platform 2 is lowered above a certain speed. When damaged, there was a problem in that the platform 2 could not be prevented from falling.

The present invention has been made in view of the above-described problems, and an object of the present invention is to provide an elevator platform fall prevention apparatus that can prevent the platform from falling even if the elevator system malfunctions or the elevator wire rope is broken.

The present invention for achieving the above object is an elevator having a platform for moving up and down along the hoistway, the lifting platform braking unit is fixedly installed to face the outside of the hoist; And a chain through which the end is fixed to the ceiling and the bottom of the elevator shaft through the platform brake unit, and when the platform descends by a predetermined speed or more, the platform brake unit is fixed to the chain to be fixedly supported. It is done.

The platform braking unit, the fixing pulley is fixed to the case forming the appearance; A moving pulley installed to rotate in cooperation with the fixed pulley through the chain and installed to move along a moving hole formed in the case; And a locking part fixedly installed between the fixed pulley and the moving pulley and having a locking groove to which the chain can be locked.

One side of the fixed pulley and the moving pulley is characterized in that the guide pulley is further provided to prevent the separation of the chain, respectively.

The platform braking unit is further provided with a first auxiliary pulley and a second auxiliary pulley in one direction of the fixed pulley, the first auxiliary pulley is rotated in a direction opposite to the rotation direction of the fixed pulley, the second auxiliary pulley The chain is wound so as to be rotated in the same direction as the rotation direction of the fixed pulley, and the second auxiliary pulley is characterized in that it is installed to be movable along the auxiliary movement hole formed in the case.

Guide pins are fixedly coupled to both ends of the rotating shaft of the movable pulley, and an elastic member is provided around the guide pins to limit the movement of the movable pulley.

The elastic member is characterized in that the spring.

The chain guide part having a chain guide hole for guiding the chain without distortion is further provided on the upper and lower parts of the platform braking part.

The chain guide hole cross-sectional shape of the chain guide portion is characterized in that the same as the cross-sectional shape of the chain.

Hereinafter, an elevator platform fall prevention apparatus according to the present invention with reference to the accompanying drawings will be described in detail.

4 is a configuration diagram of the elevator platform fall prevention apparatus according to the first embodiment of the present invention, Figures 5a and 5b is an operating state diagram of the elevator platform fall prevention device shown in Figure 4, Figure 6 is a 7 is a state diagram in which the chain acts on the engaging portion, and FIG. 7 is a state diagram in which the elevator platform fall prevention apparatus according to the present invention is mounted on the elevator.

The elevator platform fall prevention apparatus according to the first embodiment of the present invention, the platform braking unit 102 and the platform braking unit 102 is fixedly installed so as to face each other on the outside of the platform 2 (1) And a chain 101 having fixed ends at the ceiling and the bottom of the bottom). When the platform 2 is lowered by a predetermined speed or more, the chain 101 is caught in the platform brake unit 102. By being fixed and supported by 110, the platform 2 is prevented from falling.

The chain 101 is made of a conventional elliptical ring is connected to each other.

The platform braking unit 102 rotates in cooperation with the fixing pulley 104 through the fixing pulley 104 and the chain 101 fixedly installed on the plate-shaped cases (103a, 103b) to form the appearance Is installed so as to move along the movable hole 111 formed in the case 103, the moving pulley 105, fixedly installed between the fixed pulley 104 and the moving pulley 105, the chain 101 is made to have a locking portion 110 is formed with a locking groove 115 that can be locked.

The fixing pulley 104 is installed on the upper left of the case (103, 103b) is formed with a chain guide groove 116 is formed so that the chain 101 is connected in close contact with the lower, the chain guide groove 116 is formed with stepped to correspond to the cross-sectional shape of the chain (101).

The movable pulley 105 has a chain guide groove 117 of the same shape as the fixed pulley 104 is formed, the case so as to be movable along the moving hole (111a, 111b) formed in the case (103a, 103b) Is installed in the lower right of the (103a, 103b), it is made to rotate in conjunction with each other through the fixing pulley 104 and the chain 101, the rotation in the opposite direction to the rotation direction of the fixing pulley 104 Will be.

The locking portion 110 is fixedly installed to be positioned in the upper portion of the line where the fixing pulley 104 and the moving pulley 105 are diagonally connected to the inside of the case (103a, 103b), the chain 101 is A locking groove 115 capable of locking is formed.

Lifting device fall prevention device configured as described above is the chain 101 while the platform 2 is in normal operation, the fixed pulley 104 and the moving pulley 105 maintain a diagonal as shown in Figure 5a ) Is not caught by the locking portion 110, the chain 101 is normally moved in accordance with the vertical movement of the lifting platform (2).

However, when the platform 2 falls and the moving speed of the chain 101 changes sharply, a large resistance is generated in the moving pulley 105. At this time, as shown in FIG. 5B, the moving pulley 105 rotates as the rotating shaft 127. The chain 101 guided by the moving pulley 105 by overcoming the elastic force of the elastic members 112a and 112b inserted into the guide pins 126 to maintain elasticity and moving upward along the moving holes 111a and 111b. ) Also moves upwards so that the chain 101 is caught by the catching groove 115 of the catching part 110 to stop the platform 2. Here, the elastic members (112a, 112b) may be composed of a coil spring.

The width of the locking groove 115 of the locking portion 110 is formed so that the chain 101 can pass vertically with respect to the depth direction of the locking groove 115, but cannot pass horizontally. When the platform 2 falls and the resistance of the movable pulley 105 is largely generated by the chain 101, the chain 101 is caught by the catching part 110, as shown in FIG. ) Will stop.

And one side of the fixed pulley 104 and the moving pulley 105 is provided with a guide pulley (106, 107), respectively, each guide pulley (106, 107) is a chain 101 fixed pulley (104) And the chain guide grooves 116 and 117 formed in the movable pulley 105 are installed to prevent them from escaping. Each of the guide pulleys 106 and 107 is formed with guide pulley grooves 119 and 120 corresponding to the chain guide grooves 116 and 117 formed in the fixed pulley 104 and the moving pulley 105, respectively.

And guide pins 126 are fixedly coupled to both ends of the rotating shaft 127 of the movable pulley 105, and the guide pins 126 are parallel to the moving holes 111a and 111b formed in the cases 103a and 103b. It has a rod shape that is installed so that the elastic member (112a, 112b) for limiting the movement of the movable pulley 105 is formed around the guide pin 126.

The elastic members 112a and 112b are protected by the elastic member protectors 113a and 113b on the outer sides of the cases 103a and 103b, and the elastic members 112a and 113b are provided at the ends of the elastic member protectors 113a and 113b. The release preventing pins 114a and 114b are installed through to prevent the 112b from being separated from the outside.

And the platform fall prevention device according to the present invention, each chain guide hole 118 is formed in the upper and lower portions of the platform braking unit 102 so that the chain 101 can be introduced into the platform braking unit 102 without twisting Chain guides 108 and 109 are provided, and the upper chain guide 108 guides the inflow of the chain 101 when the platform braking unit 102 ascends and the lower chain guide. 109 is a guide that the chain 101 is introduced when the platform braking unit 102 is lowered, and when the platform braking unit 102 is elevated, the chain 101 smoothly flows in or out without being twisted. It works. The shape of the chain guide hole 118 is made the same as the cross-sectional shape of the chain 101 so that the chain 101 is guided so as not to be twisted once installed.

On the other hand, Figure 8 is a block diagram of the elevator platform fall prevention apparatus according to a second embodiment of the present invention.

An elevator platform fall prevention apparatus according to a second embodiment of the present invention is the first auxiliary pulley 121 and the chain guide grooves 124 and 125 to which the chain 101 can move, respectively, as shown in FIG. A second auxiliary pulley 122 is further provided. The chain 101 is installed in the first auxiliary pulley 121 and the second auxiliary pulley 122 so as to rotate in different directions. The first auxiliary pulley 121 and the second auxiliary pulley 122 are provided with guide pulleys 121a and 122a for guiding the chain 101 not to be twisted, respectively.

Meanwhile, auxiliary movement holes 123a and 123b are formed in the cases 103a and 103b of the platform braking unit 102, and the second auxiliary pulley 122 is an auxiliary movement hole of the cases 103a and 103b. It is installed to be movable along the (123a, 123b).

The first auxiliary pulley 121 and the second auxiliary pulley 122 can be lifted smoothly without being bound by the platform fall prevention apparatus according to the present invention even when the platform 2 is stopped or ascends or descends normally. In order to be able to. That is, when the platform 2 is initially raised or lowered, the resistance applied to the movable pulley 105 by the chain 101 suddenly increases, and the movable pulley 105 moves along the movable holes 111a and 111b. . At this time, the second auxiliary pulley 122 is also subjected to the resistance of the chain 101 to move the predetermined distance along the auxiliary moving holes 123a and 123b so that the chain 101 is caught by the catching part 110. Will be prevented.

9A and 9B are functional state diagrams of the elevator platform fall prevention apparatus shown in FIG. 8, and the chain 101 is locked when the platform 2 falls as described with reference to FIGS. 5A and 5B. By acting so as to be caught, the platform 2 is prevented from falling.

The elevator platform fall prevention device according to the present invention as described above prevents the fall of the platform 2 because the platform braking unit 102 is supported by the chain 101 when the platform 2 speeds down or falls. You can do it.

The above embodiment is for the most preferred example of the present invention, the present invention is not limited to the above embodiment, various modifications are possible within the scope without departing from the spirit.

The elevator platform fall prevention apparatus according to the present invention has an effect of preventing the elevator platform from falling down or falling speed by configuring a very simple fall prevention device using a pulley and a chain.

In addition, the present invention has the effect of preventing the platform from falling even when the wire rope for moving the platform up and down is broken.

In addition, the present invention is to prevent the fall of the platform even when malfunction occurs by the friction force generated by the emergency stop device that is conventionally used to prevent the platform to overspeed descent strongly holding the guide rail or wire rope. It works.

In addition, the present invention has the effect of allowing the passengers to be safely protected by stopping the platform immediately after the accident when the platform falls.

Claims (10)

In an elevator having a platform for moving up and down along a hoistway, A fixed pulley fixedly installed at one side of the case forming an appearance, a movable pulley installed to rotate in association with the fixed pulley through the chain and movable along a moving hole formed at the other side of the case; It is fixed between the fixed pulley and the moving pulley is formed with a locking groove that can be locked to the chain is formed of a locking portion which is installed so that the fixed pulley and the movable pulley is located on the upper line of the line extending diagonally, facing the outside of the platform Platform brakes are fixedly installed; And And a chain having an end fixed to the ceiling and the bottom of the hoistway through the hoist brake part. The elevator platform fall prevention device, characterized in that when the platform is lowered by a predetermined speed or more, the platform braking unit is caught and fixed to the chain. delete delete The method of claim 1, Elevator pulley fall prevention device, characterized in that one side of the fixed pulley and the moving pulley is further provided with a guide pulley for preventing the separation of the chain, respectively. The method of claim 1, The platform braking unit, A first auxiliary pulley and a second auxiliary pulley are further provided in one direction of the fixed pulley, The first auxiliary pulley is rotated in a direction opposite to the rotational direction of the fixed pulley, the second auxiliary pulley is lifted down the elevator platform, characterized in that the chain is wound so as to rotate in the same direction as the rotational direction of the fixed pulley. Sensing device. The method of claim 5, An auxiliary moving hole is formed in the case of the platform brake, The second lifting pulley fall prevention device for the elevator, characterized in that the movement is installed along the auxiliary movement hole of the case. The method according to any one of claims 1 and 4 to 6, Guide pins are fixedly coupled to both ends of the rotating shaft of the movable pulley, Elevator guide fall prevention device characterized in that the periphery of the guide pin is provided with an elastic member for limiting the movement of the movable pulley. The method of claim 7, wherein Elevator lifting platform fall prevention device, characterized in that the elastic spring is a coil spring. The method of claim 7, wherein An elevator platform fall prevention device, characterized in that the upper and lower portions of the platform braking unit is further provided with a chain guide portion formed with a chain guide hole for preventing the chain distortion. The method of claim 9, An elevator platform fall prevention apparatus, characterized in that the shape of the chain guide hole formed in the chain guide portion is made the same as the cross-sectional shape of the chain.

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