KR101783323B1 - Lift falling prevention system - Google Patents

Abstract

The present invention provides a lift falling prevention device capable of quickly preventing a fall of a lift caused by cutting of a wire rope, which is an intermediary of power transmission during a lifting operation of a lift carrying a heavy load, do.
The above object of the present invention is achieved by using the operating principle of the ratcheting gear so that when the wire rope W is cut, the detent 360 is rotated downward at the tip end by the tensile force of the tension spring 370, The falling of the moving car 200 is interrupted by the rotation of the chain sprocket 310 interlocked with the teeth of the ratcheting gear 340 provided coaxially with the chain sprocket 310 connected to the chain 200 and the chain 320, And the safety is maximized.

Description

[0001] The present invention relates to a lift falling prevention system,

The present invention relates to a device for preventing falling of a lift, which can quickly prevent a lift accident caused by cutting of a wire rope as an intermediary of power transmission during lifting operation of a lift carrying a heavy load, will be.

Generally, the cargo lifting device is well known as a kind of elevator system which is installed at a height difference position such as the ground and the underground, or the ground and the building floor, and is used to move the cargo in a loaded state.

The cargo lifting device is rotated by a driving motor in a state where the other end of the wire rope guided via the plurality of guide rollers provided at the upper portion of the moving car is connected to the hoisting machine, The moving car is guided by the guide rails on both sides by raising or lowering on a winding machine (winding drum) so as to move up and down.

Such a lifting device is fixed at one end to the wire rope in a state where a very heavy moving car and a cargo are loaded thereon at the lower end of the wire rope, thereby forcibly winding and unlocking by the hoisting machine repeatedly and for a long time, There is a problem that when the rope is wound, the wire rope breaks down due to twisting, slipping, abrasion, etc., and a brake mechanism is essentially provided as a safety device.

However, the conventional brake mechanism, which is a safety device for the cargo lifting device, has a complicated structure and requires a large cost due to a space limitation depending on equipment.

Particularly, the break mechanism of the moving car due to the cutting of the wire rope is disadvantageous in that frequent breakdown occurs, so that maintenance and repair are not costly, safety is also a problem, and the cost is further increased at the time of replacement.

Korean Utility Model Publication No. 1982-0001614 (Bulletin of July 31, 1982) Korean Registered Utility Model No. 20-0280553 (issued on April 4, 2002) Domestic Registration Utility Model Bulletin No. 20-0445840 (Notice of September 3, 2009) Korean Registered Patent No. 10-1448880 (issued October 13, 2014)

SUMMARY OF THE INVENTION The present invention has been made to overcome the disadvantages of the prior art as described above,

When the wire rope is cut by using the operation principle of the ratcheting gear, the detent is rotated downward by the tensile force of the tension spring, and at the same time, the chain sprocket provided on the opposite side and connected to the moving car by the chain, Which is engaged with the teeth of the ratchet gear provided on the upper portion of the chain sprocket so as to rapidly block the falling of the moving car by blocking the rotation of the chain sprocket, thereby maximizing the safety.

In order to achieve the above object,

A wire rope is passed through a guide roller axially coupled to a moving car coupled to the guide rails on both sides via a guide roller of one of a plurality of guide rollers axially coupled to the upper housing in a state that one end of the wire rope is wound on the hoisting machine, And the other end is fixed to the moving car via the other upper guide roller,

A chain sprocket fixed at one end to the moving car and guiding a chain supported downward by engaging a weight at a state of being axially coupled to the housing,

A ratchet keyer coupled on the coaxial axis of the sprocket shaft of the chain sprocket,

A roller shaft of a guide roller shaft-engaged with a guide shaft groove elongated upwardly and downwardly on a support plate of the housing,

A detent which is inserted into a slot machined at a rear end of the roller shaft and is axially assembled with teeth and teeth of a ratchet gear of the ratchet gear in a state in which the center of the pin is axially coupled to the housing,

 And a tension spring having one end fixed to the roller shaft and the other end supported on an upper portion of the support plate of the housing to vertically pull the roller shaft in an upward direction,

When the wire rope is cut, the tension spring pulls the roller shaft upward from the guide shaft groove, and the tip of the detent is rotated downward about the shaft pin to engage with the toenails of the ratcheting gear, And the lift-off preventing device is provided.

According to the present invention, it is possible to equip the existing lift device or the new lift device with a simple structure, thereby assuring the reliability of the device.

Further, according to the present invention, there is an advantage that the falling of the lift is quickly blocked, and the reliability as a safety device is ensured.

Further, according to the present invention, it is possible to use commercially available ratchets, industrially, a mass production effect can be expected, and it is possible to provide at low cost.

1 is a front view of a lift apparatus to which the present invention is applied.
2 is an enlarged view of the portion "F" of FIG. 1
3 is a side view of a lift apparatus to which the present invention is applied.
4 is an enlarged view of the "G" portion of FIG.
FIG. 5 and FIG. 6 are explanatory views showing the operation of the present invention,
Fig. 4 is an enlarged view of the normal state in which the wire rope is not cut,
Fig. 5 is an enlarged view of the operating state taken along the cutting of the wire rope.

Hereinafter, the present invention will be described in detail with reference to FIGS. 1 to 6 attached hereto.

In the description of the present invention, the structure and size of the constituent elements shown in the drawings can be simplified or simplified as long as they do not interfere with the description of the invention.

1 and 3, the apparatus for preventing fall of a lift according to the present invention comprises a housing 120 provided on upper portions of guide rails 110 and 111 on both sides, a guide roller R1 axially coupled to the housing, The other end of the wire rope W is guided via the guide roller R3 which is axially coupled to the moving car 200 and is guided by the other guiding roller The moving carriage is guided by the guide rails on both sides to raise and lower the moving carriage by winding or unwinding the moving carriage by the traction machine D while being fixed to the moving carriage 200 via the guide rails R2 do.

The chain sprocket 310 is axially coupled to the opposite side of the guide roller R2 on the upper side by a sprocket shaft 311 and the chain sprocket 310 is coupled to the chain 320 is wound and fixed at one end thereof to the moving car 200 while the other end thereof is wound with a weight 330 hanging thereon.

Therefore, the chain 320 is coupled to the chain sprocket 310 while being pulled down by the weight 330 in a downward direction.

At this time, the ratchet 340 is assembled to the sprocket shaft 311 of the chain sprocket 310,

The roller shaft 350 of the guide roller R2 is axially coupled to a guide shaft groove 150 formed on the support plate 121 of the housing 120 on the opposite side of the chain sprocket 310, The tip end claw 361 is engaged with the tooth 341 of the ratchet gear 340 and the gear 342 of the ratchet gear 340 in a state in which the center is axially coupled to the housing 120 by the shaft pin P, The pawl 360 assembled in the state of being free from the biting is assembled.

One end of the tension spring 350 is fixed to the roller shaft 350 and the other end thereof is supported on the support plate 121 of the housing 120 so that the roller shaft 350 is pulled upward, (See Fig. 3).

5, a large load is applied downward by the wire rope W pulled by the downward load by the guide roller R2 by the moving car 200, so that the tensile force of the tension spring 370 And the roller shaft 350 is in contact with the lower side of the guide shaft groove 150.

Therefore, the pawl 360 installed on the principle of the leverage is pulled downward about the pivot pin P as the rear end thereof is pulled down and the state where the tip claw 361 is engaged with the teeth 341 of the ratchet gear 340 is released State.

When the wire rope W is cut in this state, as shown in FIG. 6, the moving car 200 descends downward, and at the same time, the moving car 200 supported by the chain 320 of the chain sprocket 310 The roller shaft 350 pulled by the tensile force of the tension spring 370 rotates while the ratchet gear 340 assembled to the sprocket shaft 311 of the chain sprocket 310 rotates, The pawl 360 is pivoted downward about the pivot pin P while the tip claw 361 is engaged with the teeth 341 of the ratchet gear 340 as the pawl 360 is pulled toward the upper side of the guide shaft groove 150 So that the falling of the moving car 320 is blocked.

The present invention is advantageous in that the falling of the moving car 200 can be quickly blocked while the balance between the principle of the ratcheting gear, the tension spring and the opposite tension force and load of the chain is broken.

INDUSTRIAL APPLICABILITY The present invention can be widely used industrially as a safety device in a lift apparatus for moving a cargo or a person to an upper layer or a lower layer.

110, 111: Guide rail
120: enclosure
150: guide shaft groove
200: Moving Car
310: chain sprocket
311: sprocket axle
320: Chain
330: Weights
340: ratcheting gear
341: Tooth
350: roller shaft
360: detent
361: Fingernail
362: Slot
370: Tension spring
P: Pivot pin
R1.R2, R3: Guide roller
W: Wire rope

Claims (1)

The wire rope W is wound on the hoisting machine D via one guide roller R1 among the plurality of guide rollers R1 and R2 axially coupled to the upper housing 120 in a state in which the wire rope W is wound at one end, Via the upper guide roller R2 via the guide roller R3 axially coupled to the lifting and lowering carriage 200 coupled to the lifting and lowering rails 110 and 111 and the other end fixed to the lifting carriage 200 In the lift apparatus,
A chain sprocket 310 which is fixed to the moving car 200 at one end and guides the chain 320 supported by the weights 330 in a state of being axially coupled to the housing 120;
A ratcheting gear 340 coupled to the sprocket shaft 311 of the chain sprocket 310;
The roller shaft 350 of the guide roller R2 axially coupled to the opposite side of the chain sprocket 310 and axially coupled to the guide shaft groove 150 formed to be long in the up and down direction on the support plate 121 of the housing 120, ;
The tip claw 361 is inserted into the slot 362 formed in the rear end of the roller shaft 350 and the center of the shaft 360 is pivotally connected to the housing 120 by the shaft pin P, A detent 360 which is axially assembled with teeth 341 and no gear engagement;
A tension spring (not shown) having one end fixed to the roller shaft 350 and the other end supported on the support plate 121 of the housing 120 to vertically pull the roller shaft 350 in a pulled- 370); Lt; / RTI >
When the wire rope W is cut, the tension spring 370 pulls the roller shaft 350 upward from the guide shaft groove 150 and the detent 360 rotates about the shaft pin P (341) of the ratchet gear (340) is engaged with the tip claw (361) to block the fall of the lift claw (361).

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