KR101794126B1 - Apparatus for preventing separation of wire rope for crane - Google Patents

Apparatus for preventing separation of wire rope for crane Download PDF

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Publication number
KR101794126B1
KR101794126B1 KR1020160028771A KR20160028771A KR101794126B1 KR 101794126 B1 KR101794126 B1 KR 101794126B1 KR 1020160028771 A KR1020160028771 A KR 1020160028771A KR 20160028771 A KR20160028771 A KR 20160028771A KR 101794126 B1 KR101794126 B1 KR 101794126B1
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KR
South Korea
Prior art keywords
wire rope
pulley
crane
ring
guide rollers
Prior art date
Application number
KR1020160028771A
Other languages
Korean (ko)
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KR20170106537A (en
Inventor
김영배
Original Assignee
주식회사 포스코
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Priority to KR1020160028771A priority Critical patent/KR101794126B1/en
Publication of KR20170106537A publication Critical patent/KR20170106537A/en
Application granted granted Critical
Publication of KR101794126B1 publication Critical patent/KR101794126B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/28—Other constructional details
    • B66D1/36—Guiding, or otherwise ensuring winding in an orderly manner, of ropes, cables, or chains
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C15/00—Safety gear
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/28—Other constructional details
    • B66D1/36—Guiding, or otherwise ensuring winding in an orderly manner, of ropes, cables, or chains
    • B66D1/38—Guiding, or otherwise ensuring winding in an orderly manner, of ropes, cables, or chains by means of guides movable relative to drum or barrel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/54—Safety gear
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D2700/00—Capstans, winches or hoists
    • B66D2700/01—Winches, capstans or pivots
    • B66D2700/0183—Details, e.g. winch drums, cooling, bearings, mounting, base structures, cable guiding or attachment of the cable to the drum
    • B66D2700/0191—Cable guiding during winding or paying out

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control And Safety Of Cranes (AREA)

Abstract

A wire rope derailment prevention device for a crane is disclosed. A device for preventing wire rope derailment of a crane according to an embodiment of the present invention is a device for preventing wire rope derailment of a crane, which is installed vertically in a vertical direction on a pulley, and which has a wheel rotating in contact with a wire rope wound on a groove of a sheath by a pressing force of an elastic member, And a pair of guide rollers disposed on the front and rear sides of the wire rope so as to rotate in contact with the wire rope at the bottom of the pulley and a shock absorber provided at the bottom of the sheave to buffer the shaking of the wire rope by elastically supporting the wire rope do.

Description

TECHNICAL FIELD [0001] The present invention relates to a wire rope derailment prevention device for a crane,

The present invention relates to an apparatus for preventing derailment of a wire rope in a pulley of a crane.

Generally, molten steel refined in a converter or the like is taken to a ladle placed on a ladle and then moved to a crane working position, lifted by a crane, and transferred to a subsequent work process.

In other words, the crane is wound and lifted by raising or lowering the wire rope connected with the beam having the main hook which is caught in the ring formed on both sides of the ladle, moves along the rail installed in the air, .

A winch is installed on the crane to wind or unroll the wire rope, and the wire rope that is wound or unwound by the winch is partially wound on the pulley installed on the crane and is turned vertically.

On the other hand, the wire rope is subjected to a lot of force during the coping hooking operation. Therefore, when the object hanged on the hook suddenly falls, the wire rope becomes sluggish, and the derailment occurs frequently in the pulley.

Open Patent Publication No. 2012-0063054 (published on June 15, 2012)

Embodiments of the present invention provide a wire rope derailment prevention device for a crane capable of preventing derailment of a wire rope in a sheave by shaking of a wire rope when an object caught on the hook suddenly falls during crane work.

According to an aspect of the present invention, there is provided a sensor device comprising: a sensor rod installed to be vertically movable up and down from an upper portion of a pulley, having a wheel rotating in contact with a wire rope wound around a groove of the sheave by a pressing force of an elastic member; A pair of guide rollers disposed at front and rear sides of the wire rope so as to rotate in contact with the wire rope at a lower portion thereof and a shock absorber installed at a lower portion of the sheave to elastically support the wire rope, A wire rope derailment prevention device for a crane including a crane can be provided.

Further, the shock absorber includes a ring surrounding the outer surface of the wire rope, and a buffer spring for elastically supporting the ring.

The buffer spring may be connected to the ring to exert an elastic force in the horizontal direction.

And an upper casing in which the sensor rod is supported so as to be able to move up and down, and a lower casing in which the pair of guide rollers and the buffer spring are supported.

And a portion of the pair of guide rollers contacting the wire rope may be formed with a recess corresponding to a part of the circumferential surface of the wire rope.

Further, the sensor rod is supported so as to be movable up and down in the upper casing, and when the wire rope is deviated from the sheath and the sensor rod is moved downward, a switch operating portion protruding to one side of the sensor rod is provided on the upper casing The switch can be operated.

Embodiments of the present invention can prevent derailment of a wire rope of a pulley installed in a crane, thereby improving the stability of the operator and reducing the maintenance cost of the pulley.

1 schematically shows a crane according to an embodiment of the present invention.
2 is a perspective view illustrating a pulley wire rope derailment prevention apparatus according to an embodiment of the present invention.
3 is a cross-sectional view illustrating a pulley wire rope derailment prevention apparatus according to an embodiment of the present invention.
4 is an operational state diagram of a sensor rod when derailment of a wire rope according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments described below are provided by way of example so that those skilled in the art will be able to fully understand the spirit of the present invention. The present invention is not limited to the embodiments described below, but may be embodied in other forms. In order to clearly explain the present invention, parts not related to the description are omitted from the drawings, and the width, length, thickness, etc. of the components may be exaggerated for convenience. Like reference numerals designate like elements throughout the specification.

1 schematically shows a crane according to an embodiment of the present invention.

Referring to FIG. 1, a crane according to an embodiment of the present invention is a device for transporting ladle 10 containing molten steel or scrap to a subsequent process. The crane is mounted along a rail 21 provided on a frame 20 installed on a ceiling And includes a moving main trolley 23 and a secondary trolley 24.

The main trolley 23 and the auxiliary trolley 24 are moved along the rail 21 independently of each other and the trolleys 23 and 24 are provided with a winding device for lifting or reversing the ladle 10 do.

The winding device includes a pulley that winds the wire rope 30, and the wire rope 30 wound and unwound by the winch is supported by the pulley so as to move up and down.

The lifting operation of the hook beam 25 holding the molten metal ladle 10 is performed by the wire rope 30 driven by the winding device disposed in the main trolley 23. [

The main hook 26 formed in the shape of a hook can be connected to the lower portion of the hook beam 25 and the ladle 10 hooked to the main hook 26 can be connected to the upper and lower .

On the upper side of the auxiliary trolley 24, a pulley for winding and unwinding a wire rope 30 wound and unwound by a winding device is provided, and a bobbin hook 27 formed in a hook shape is connected to the lower end of the wire rope 30 .

The compensating hook 27 lifts the lower portion of the ladle 10 supported by the main hook 26 and adjusts the tilting angle of the ladle 10.

On the other hand, when the ladle 10 hooked on the bobbin hook 27 is suddenly dropped during the operation using the bobbin hook 27, the wire rope 30 connected to the bobbin hook 27 is swung up and down and left and right.

At this time, the wire rope 30 is frequently deviated from the pulley due to the upward and downward forces generated in the wire rope 30. When the wire rope 30 is forced to work without knowing the derailment of the wire rope 30, 30) There is a problem that leads to a secondary accident due to the incision and serious damage to each part.

In order to prevent this, in the present embodiment, there is provided a device for preventing a pulley derailment of a crane, which can inform a worker of derailment of the wire rope 30 while derailment of the wire rope 30 is prevented in a pulley.

FIG. 2 is a perspective view illustrating a pulley wire rope derailment prevention apparatus according to an exemplary embodiment of the present invention, and FIG. 3 is a cross-sectional view illustrating a pulley wire rope derailment prevention apparatus according to an exemplary embodiment of the present invention.

2 and 3, a pulley wire rope derailment prevention apparatus according to an embodiment of the present invention includes a sensor rod 50 installed vertically up and down on a top of a pulley 40, And a pair of guide rollers 60 and a shock absorber 70 for preventing the wire rope 30 from shaking.

The sensor rod 50 may be provided in a number corresponding to that of the pulley 40. In the present embodiment, two sensor rods 50 are provided.

The sensor rod 50 can be supported by the upper casing 35 provided on the upper portion of the pulley 40 so that the sensor rod 50 can be lifted up and down. And keeps contact with the wire rope 30 wound on the wire rope 41.

The sensor rod 50 may be formed as a cylindrical body, and the upper end may protrude upward through the opening formed in the upper end of the upper casing 35.

A spring support portion 52 extending radially outward is provided at the lower end of the sensor rod 50 to support the lower end of the elastic member 55 and a wheel 51 is rotatably supported at a lower portion of the spring support portion 52 A wheel bracket 53 is provided.

The elastic member 55 may be composed of a coil spring whose upper end is supported by the upper casing 35 and whose lower end is supported by the spring support portion 52. When the wheel 51 is wound on the groove 41 of the pulley 40 And provides an elastic force in a direction to press the wire rope (30).

A switch operating portion 56 protruding outwardly may be provided on one side of the upper end of the sensor rod 50. When the switch operating portion 56 is moved downward on the upper surface of the upper casing 35, 56 may be provided.

The switch 57 may be installed on the switch bracket 58 provided on the upper surface of the upper casing 35.

The switch 57 includes a micro switch, a reed switch, and the like, which are electrically connected to a control unit (not shown) and transmit sensed information to the control unit.

When the signal sensed by the switch 57 is transmitted, the control unit can output the derailment information of the wire rope 30 to the operator through the alarm unit such as a speaker (not shown) in a voice form.

A lower portion of the pulley 40 is provided with a pair of guide rollers 60 and a lower casing 36 for supporting the shock absorber 70.

Both ends of the pair of guide rollers 60 can be rotatably supported on the two opposing side walls of the lower casing 36.

On both side walls of the lower casing 36, there can be provided a bearing member 61 that can smoothly rotate both ends of the pair of guide rollers 60.

The pair of guide rollers 60 can be spaced apart from each other with the wire rope 30 interposed therebetween to guide the steady raising and lowering movement of the wire rope 30 extending to the lower portion of the pulley 40. In this embodiment, for convenience of explanation, a pair of guide rollers 60 are arranged to guide the wire rope 30 arranged side by side in a row, but the pair of guide rollers 60 are arranged in a front- Two pieces corresponding to the wire rope to be disposed can be provided.

A recess 63 corresponding to a part of the circumferential surface of the wire rope 30 may be formed at a portion of the pair of guide rollers 60 contacting the wire rope 30. [

The concave portion 63 formed in the pair of guide rollers 60 guides part of the circumferential surface of the wire rope 30 to stably move up and down the wire rope 30, To a certain extent.

The shock absorber 70 is used for secondarily buffering the shaking of the wire rope 30 which is not buffered by the pair of guide rollers 60. The shock absorber 70 is provided to elastically support the wire rope 30, 30).

The shock absorber 70 includes a ring 71 surrounding the outer surface of the wire rope 30 and a buffer spring 72 for elastically supporting the ring 71.

The ring 71 has a hollow cylindrical shape with an open center, and the wire rope 30 can be mounted so as to pass through the center of the ring 71. Here, the number of rings 71 may have a number corresponding to that of the wire rope 30 which is wound on the pulley 40 and extends downward.

The buffer spring 72 may be connected to the ring 71 so as to exert an elastic force in the horizontal direction on the ring 71 and may be connected to the ring 71 by a high tension spring ≪ / RTI >

The buffer spring 72 can be supported at both ends of the ring 71 and the side wall of the lower casing 36 so that both ends of the buffer ring 72 can be supported between the neighboring rings 71 . Here, the number of the buffer springs 72 is three, but it can be changed according to the number of the rings 71 surrounding the wire rope 30. [

When the wire rope 30 moves upward and downward, the wire rope 30 can move without interference with the ring 71. When the wire rope 30 swings up and down and right and left, The vibration is buffered by the ring 71 supported by the ring gear 72.

With this configuration, when the object hanging on the bobbin hook 27 is suddenly dropped or the wire rope 30 is cut off in a state where the wire rope 30 receives a lot of tension in the coping hooking operation, the wire rope 30 is moved up and down It will swing from side to side.

The pair of guide rollers 60 primarily suppress the wobbling of the wire rope 30 and at the same time the vibration of the wire rope 30 is secondarily canceled by the shock absorber 70. [

The wheel 51 of the sensor rod 50 is in a state of pressing the wire rope 30 wound around the groove 41 of the pulley 40 by the elastic force of the elastic member 55, It is possible to further prevent derailment in the pulley 40.

On the other hand, when the wire rope 30 is deviated from the pulley 40, the sensor rod 50 moves downward due to the elastic force of the elastic member 55 as shown in FIG. Accordingly, when the switch operating part 56 provided in the sensor rod 50 operates the switch 57, the operator operating the crane through the alarm part can know the derailment information of the wire rope 30.

The foregoing has shown and described specific embodiments. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined in the appended claims.

10: ladle, 20: frame,
30: wire rope, 35: upper casing,
36: lower casing, 40: pulley,
41: groove, 50: sensor rod,
51: wheel, 55: elastic member,
56: switch operating portion, 57: switch,
60: guide roller, 63: concave portion,
70: shock absorber, 71: ring,
72: buffer spring.

Claims (6)

A sensor rod installed so as to be vertically movable up and down from the upper portion of the pulley and having a wheel rotating in contact with a wire rope wound around the groove of the sheave by a pressing force of the elastic member;
A pair of guide rollers disposed in front of and behind the wire rope to rotate in contact with the wire rope at a lower portion of the pulley; And
And a shock absorber installed at a lower portion of the pulley to elastically support the wire rope to buffer the shaking of the wire rope,
The sensor rod is supported so as to be movable up and down in an upper casing provided at an upper portion of the pulley, and a switch operation portion, which is protruded to one side of the sensor rod when the wire rope is deviated from the pulley, And a switch provided in the upper casing is operated. The method according to claim 1,
Wherein the shock absorber includes a ring surrounding the outer surface of the wire rope and a cushion spring for elastically supporting the ring. 3. The method of claim 2,
Wherein the buffer spring is connected to the ring to apply an elastic force in the horizontal direction to the ring. 3. The method of claim 2,
Further comprising a lower casing in which the pair of guide rollers and the buffer springs are supported. The method according to claim 1,
Wherein a portion of the pair of guide rollers contacting the wire rope is formed with a recess corresponding to a part of a circumferential surface of the wire rope.

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KR1020160028771A 2016-03-10 2016-03-10 Apparatus for preventing separation of wire rope for crane KR101794126B1 (en)

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Application Number Priority Date Filing Date Title
KR1020160028771A KR101794126B1 (en) 2016-03-10 2016-03-10 Apparatus for preventing separation of wire rope for crane

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Application Number Priority Date Filing Date Title
KR1020160028771A KR101794126B1 (en) 2016-03-10 2016-03-10 Apparatus for preventing separation of wire rope for crane

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KR20170106537A KR20170106537A (en) 2017-09-21
KR101794126B1 true KR101794126B1 (en) 2017-11-07

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102187202B1 (en) * 2018-12-31 2020-12-04 주식회사 스카이시스 Winch
KR102322008B1 (en) * 2021-05-11 2021-11-08 주식회사 아트필 Pulley for stage
CN114251432B (en) * 2021-12-30 2024-02-27 重庆运满机械设备有限公司 Wire rope pressing device
CN115321404A (en) * 2022-08-31 2022-11-11 安徽省中冶重工机械有限公司 Universal multifunctional safety pulley special for piling ship
CN117220218B (en) * 2023-11-08 2024-04-02 三峡金沙江云川水电开发有限公司 Cable support frame for hydropower station

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200265063Y1 (en) * 2001-11-30 2002-02-21 포항종합제철 주식회사 Wire fixing apparatus for hook crane

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200265063Y1 (en) * 2001-11-30 2002-02-21 포항종합제철 주식회사 Wire fixing apparatus for hook crane

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