KR20160065699A - Trolley for tensioning the wire rope tensioning apparatus and a transfer method - Google Patents

Trolley for tensioning the wire rope tensioning apparatus and a transfer method Download PDF

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Publication number
KR20160065699A
KR20160065699A KR1020140170064A KR20140170064A KR20160065699A KR 20160065699 A KR20160065699 A KR 20160065699A KR 1020140170064 A KR1020140170064 A KR 1020140170064A KR 20140170064 A KR20140170064 A KR 20140170064A KR 20160065699 A KR20160065699 A KR 20160065699A
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South Korea
Prior art keywords
wire rope
sagging
tension
trolley
sensing
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KR1020140170064A
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Korean (ko)
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허영우
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두산중공업 주식회사
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Priority to KR1020140170064A priority Critical patent/KR20160065699A/en
Publication of KR20160065699A publication Critical patent/KR20160065699A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C11/00—Trolleys or crabs, e.g. operating above runways
    • B66C11/16—Rope, cable, or chain drives for trolleys; Combinations of such drives with hoisting gear
    • B66C11/18—Rope, cable, or chain drives for trolleys; Combinations of such drives with hoisting gear comprising endless ropes or cables
    • 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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)

Abstract

A sensing means for sensing sagging or sagging of the wire rope so as to prevent skewing of the trolley due to deflection or sagging of the wire rope after a certain use period following the trolley transfer; And tension adjusting means for adjusting the tension of the wire rope to compensate for deflection or sagging of the wire rope sensed by the sensing means, and a tension adjusting method of the wire rope for trolley conveying .
Accordingly, not only the effect of securing a high reliability according to the conveyance of the trolley, but also the wear and tear of each part due to the prevention of the skew, as well as the prevention of breakage, can be secured.

Figure P1020140170064

Description

TECHNICAL FIELD [0001] The present invention relates to a trolley for tensioning a wire rope,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an apparatus for adjusting tension of a wire rope for transporting a trolley provided in a gantry crane, and more particularly, The present invention relates to a tension adjusting device for a wire rope for conveying a trolley and a method for adjusting the tension thereof.

In general, gantry cranes are placed at the port to ship the container from the pier to the ship or from the ship to the pier.

A typical gantry crane includes a gantry running along a rail, a trolley traversing the gantry, and a spreader installed on the trolley to be movable up and down.

The trolley of the gantry crane having the above structure is fixed to one end of the trolley via a supporting sheave, one end of the wire rope wound on the winding drum is fixed to the other end of the mounting wire rope through an equalizer sheave And fixed to the other end of the trolley to reciprocate the trolley. Between the winding drum and the balance sheave, a rope tensioner is provided to compensate for deflection of the wire rope when a slack phenomenon occurs momentarily due to the weight of a transported article carried on a trolley.

In this way, when the trolley is transported by the winding drum and the wire rope, the wire rope sags or sags as the period of use expires, that is, about 6 months to 1 year after the installation has elapsed.

Accordingly, the trolley does not perform a normal reciprocating motion, but has a problem that uneven wear occurs on the conveying wheel and the rail, which are the conveying means, due to the jagged conveyance. Also, various auxiliary rolls and guide rolls in addition to the conveying wheels and rails were also caused to be damaged early.

As described in Japanese Patent No. 5555440 (hereinafter referred to as "Patent Document 1"), the second trolley drive apparatus moves the second trolley in the width direction with respect to the first trolley, Technology has been proposed.

Also, as disclosed in Korean Patent Laid-Open Publication No. 2000-0066572 (hereinafter referred to as "Patent Document 2"), there has been proposed a technique such as an automatic shake prevention system for preventing shaking when moving a heavy object on a rope .

In addition, as disclosed in Japanese Patent No. 5039365 (hereinafter referred to as "Patent Document 3"), the skew vibration preventing device of a crane including a main rope length adjusting device which can minimize the skew deviation of the dropping by adjusting the length of the main rope Have been proposed.

Japanese Patent No. 5555440 Korean Patent Publication No. 2000-0066572 Japanese Patent No. 5039365

However, Patent Documents 1 and 2 do not have a means for preventing the trolley from being skewed due to sagging or sagging of the wire rope due to the trolley conveyance.

Patent Document 3 discloses a technique for adjusting the length of a main rope, but this is to prevent the skew from being vibrated, which has a disadvantage that it can not solve the problem caused by the meandering of the trolley.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a wire rope for conveying trolleys which can prevent the trolley from being conveyed due to sagging or sagging of the wire rope after a certain period of use due to the conveyance of the trolley. And a tension adjusting method thereof.

Another object of the present invention is to control the tension of each wire rope in proportion to the degree of sagging or sagging of the wire rope.

According to an aspect of the present invention, there is provided a wire rope comprising: a pair of wire ropes wound on both sides of a winding drum connected to ends of a trolley, The apparatus comprising: sensing means for sensing deflection or sagging of a wire rope; And tension adjusting means for adjusting the tension of the wire rope to compensate for deflection or sagging of the wire rope sensed by the sensing means.

The sensing means and the tension adjusting means are provided between one end of each wire rope passing through the support sheave in the winding drum and the trolley.

One end of the sensing means is fixed to one end of the trolley, the other end of the sensing means is connected to the tension adjusting means, and the tension adjusting means is connected to one end of the wire rope.

The sensing means is a load cell, which is a sensing sensor for sensing deflection or sagging of each wire rope.

One end of the tension adjusting means is connected to the load cell serving as the sensing means, and the other end is a ball screw or a jack screw to which a wire rope is connected.

One end of the tension adjusting means is connected to the load cell serving as the sensing means, and the other end is a turnbuckle to which a wire rope is connected.

A method for adjusting tension of a wire rope to prevent a skew caused by a decrease in tension in a process of connecting a pair of wire ropes wound on both sides of a winding drum to each end of a trolley, Sensing deflection or sagging of each wire rope as it traverses; And adjusting the tension of the wire rope to compensate for sagging of the detected wire rope.

Detection of deflection or sagging of the wire rope is detected by a sensing sensor connected between the wire rope and the trolley.

The adjustment of the tension of the wire rope is performed by a tension adjusting means interposed between the detection sensor and the wire rope in proportion to the deflection or sagging of the wire rope by the detection sensor.

The proportional adjustment of the wire rope is carried out by winding or winding each wire rope according to the deflection or sagging degree of each wire rope.

The present invention can prevent the trolley from being skewed due to sagging or sagging of the wire rope after a certain period of use due to the transport of the trolley, thereby ensuring high reliability of the trolley conveyance, It also has the effect of ensuring long service life by preventing wear and tear of parts as well.

In addition, by controlling the tension of each wire rope in accordance with the deflection or sagging degree of the wire rope, it is possible to precisely control the tension according to the degree of sagging or sagging of each wire rope, Effect.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a general conceptual diagram for explaining the present invention,
Fig. 2 is a partial enlarged view according to Fig. 1,
3 is a reference diagram for explaining the use state of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The present invention is not limited to or limited by the embodiments.

FIG. 1 is a schematic diagram for explaining the present invention, FIG. 2 is a partially enlarged view according to FIG. 1, and FIG. 3 is a reference diagram for explaining a use state of the present invention.

As shown in the drawing, a pair of wire ropes 112 wound on both sides of the winding drum 110 are connected to the respective ends of the trolley 100 for transporting a container such as a container, (1) for preventing tension of a wire rope.

The trolley 100 is applied to a known gantry crane and one end of the wire rope 112 wound around the winding drum 110 is fixed to one end of the trolley through one side support sheave 114, The other end of the wire rope 112 is fixed to the other end of the trolley 100 through the balance sheave 116 to reciprocate the trolley 100. In addition, the wire rope 112 between the winding drum 110 and the balance sheave 116 compensates for deflection of the wire rope in a slack phenomenon instantaneously caused by the weight of the transportation carried by the trolley A rope tensioner 120 is provided.

The present invention is intended to prevent the trolley from skewing due to sagging or sagging of the wire rope after a certain use period has elapsed following the transfer of the trolley.

The tension control device 1 according to the present invention includes sensing means 10 for detecting deflection or sagging of the wire rope 112 when the trolley 100 is transported by the wire rope 112; And tension adjusting means 20 for adjusting the tension of the wire rope 112 to compensate for sagging or sagging of the wire rope 112 sensed by the sensing means 10. At this time, the tension adjustment is controlled by a known method of pulling or winding.

In other words, the trolley is wrapped around the winding drum after a period of about six months to one year has elapsed after the trolley has been installed, resulting in deflection or sagging of the wire rope carrying the trolley. In this way, the trolley can not be normally transported due to sagging or sagging of the wire rope, and meandering is performed. As a result, uneven wear occurs on the conveying wheel and the conveying means provided on the trolley, and various auxiliary rolls and guide rolls are also damaged in an early stage.

Accordingly, it is an object of the present invention to prevent the meandering of the wire rope due to deflection or sagging of the wire rope during the transportation of trolleys. First, after sensing the deflection or sagging of the wire rope by the sensing means, The rope is adjusted by tension adjusting means.

As a result, the trolley can not be transported to the meander, so that the problem of the meander can be solved.

Particularly, the present invention does not have a complicated structure, but detects the sagging or sagging of the wire rope by a simple structure between the wire rope and the trolley, and adjusts the tension easily. Therefore, even if the trolley is stable The transfer can be smoothly performed normally.

Thereby minimizing abrasion of the conveying wheels and rails due to the conveyance of the trolley, preventing early breakage of various auxiliary rolls and guide rolls, ensuring a long period of use, and high reliability.

The sensing means 10 and the tension adjusting means 20 are provided between the trolley 100 and one end of each wire rope 112 that has passed through the supporting sheave 114 provided at one side of the winding drum 110, One end of the means 10 is fixed to one end of the trolley 100 by a conventional method and the other end of the sensing means 10 is connected to the tension adjusting means 20 by a conventional ring system or by a bracket or a coupler , The tension adjusting means 20 is connected to one end of the wire rope 112 by a conventional ring system, a bracket or a coupler.

That is, the reason why the sensing means and the tension adjusting means are not connected to the trolley on the side where the rope tensioner is installed and the wire rope side is that the wire rope in which the rope tensioner is located is compensated for a certain degree of deflection by the rope tensioner, It is preferable to provide the wire rope between the sheave and the trolley.

Accordingly, the wire rope is first sagged or sagged by the sensing means, and the tension of the wire rope is adjusted using the tension adjusting means according to the detected sagging or sagging degree, The trolley transported by the trolley can be prevented from being conveyed in a meandering manner, so that stable transportation can be achieved.

In addition, the sensing means and the tension adjusting means can continuously control the tension of the wire rope after continuously detecting the deflection or sagging of the wire rope, thereby providing a condition for stably transporting the trolley semi-permanently.

It is preferable that the sensing means 10 is a conventional cylindrical rod cell, which is a sensing sensor for detecting deflection or sagging of each wire rope 112. At this time, it is also possible to use a known tension sensor or the like capable of measuring a normal tension in addition to the load cell.

Here, the load cell is a type of load sensor that converts a force applied to an elastic body to an electric signal by using a strain gauge whose electric resistance value changes according to the sagging or sagging degree of the wire rope. Measure the degree of sagging or sagging relatively accurately.

Thereby realizing a condition for precisely controlling the tension by the tension adjusting means.

One end of the tension adjusting means 20 is connected to the load cell which is the sensing means 10 by a normal coupler or a connecting means and the other end is connected to a conventional ball screw or a ball screw which is connected to the wire rope 112 by a normal coupler, Jack screw. At this time, since the ball screw and the jack screw have a known technical structure having a pulling or loosening function, a detailed description will be omitted. In addition, the tension adjusting means may be replaced with a known take-up reel in place of the ball screw or the jack screw, and a winding and unwinding method may be applied.

The tension adjusting means adjusts the tension of the wire rope accurately according to the degree of sagging or sagging measured by the load cell as the sensing means, so that the trolley can be transported stably and normally without being skewed.

One end of the tension adjusting means is connected to the load cell, which is the sensing means, by a normal coupler or a connector, and the other end is a turnbuckle (not shown) to which the wire rope is coupled by a conventional method. Since the turn buckle is also used for adjusting the normal tension or the like, the tension of the wire rope can be easily adjusted according to the degree of deflection or sagging measured from the load cell as the sensing means.

Therefore, according to the sagging or sagging of the wire rope used for transporting the trolley, the tension of the wire rope can be conveniently and accurately adjusted by a simple structure without complicated, troublesome and inconvenient.

As a result, even when the trolley is used for a long time, the wire rope is deflected or the tension is adjusted as much as it is stretched, so that the trolley can be transported stably without conveying the meander.

In addition, it is possible to prevent not only the abrasion of each part due to the skew prevention but also the breakage of the parts, thereby ensuring a longer use period and securing high reliability.

Meanwhile, in the method of adjusting the tension of the wire rope according to the present invention, a step of sensing the sagging or sagging of each wire rope according to the conveyance of the trolley by a load cell or the like as a normal detection sensor is performed first.

And then adjusting the tension of the wire rope by using a conventional tension adjusting means to compensate for the sagging of the detected wire rope.

Accordingly, the tension of the wire rope is controlled by the tension adjusting means according to the sagging or sagging of the wire rope after detecting the deflection or sagging of the wire rope by the detecting sensor, not by a troublesome or complicated process, The transfer can be performed stably without slipping.

The tension of the wire rope is adjusted by a tension adjusting means interposed between the sensor and the wire rope in accordance with the degree of sagging or sagging of the wire rope by the sensor.

That is, the wire rope is located on both sides of the winding drum and is connected to both sides of the trolley, so that the slack or slack of the wire rope is not made the same, but either one may sag or stretch.

Accordingly, the tension of the wire rope connected to both sides of the trolley is adjusted to be equal to the tension of the other wire rope by the detection sensor and the tension adjusting means provided on the wire rope, So that the conveyance can be stably performed while preventing the meander.

In addition, the proportional adjustment of the wire rope is carried out by winding or winding each wire rope according to the degree of sagging or sagging of each wire rope. That is, it is possible to adjust the tension of the wire rope by a normal ball screw, a jack screw or a turn buckle or a known take-up reel or the like.

Thus, the method of controlling the tension of the wire rope of the present invention is not limited to a complicated and troublesome process, but it can precisely detect the deflection or slackness of the wire rope, Can be stably conveyed without conveying the meander, thereby securing high reliability.

1: tension adjusting device
10: sensing means 20: tension adjusting means
100: trolley 110: winding drum
112: wire rope 114: support sheave
116: Balancing sheave 120: Rope tensioner

Claims (10)

A wire rope tension adjusting device for preventing a skew caused by a decrease in tension in a process of connecting a pair of wire ropes wound on both sides of a winding drum to ends of a trolley,
Wherein the tension adjusting device comprises sensing means for sensing deflection or sagging of the wire rope; And
And tension adjusting means for adjusting the tension of the wire rope to compensate for deflection or sagging of the wire rope sensed by the sensing means. The method according to claim 1,
Wherein the sensing means and the tension adjusting means are provided between one end of each wire rope having passed through the support sheave in the winding drum and the trolley. 3. The method of claim 2,
Wherein one end of the sensing means is fixed to one end of the trolley, the other end of the sensing means is connected to the tension adjusting means, and the tension adjusting means is connected to one end of the wire rope. Device. The method of claim 3,
Wherein the sensing means is a load cell which is a sensing sensor for sensing sagging or sagging of each wire rope. 5. The method of claim 4,
Wherein one end of the tension adjusting means is connected to the load cell as the sensing means and the other end is a ball screw or a jack screw to which the wire rope is connected. The method of claim 3,
Wherein one end of the tension adjusting means is connected to the load cell as the sensing means and the other end is a turnbuckle to which a wire rope is connected. A wire rope tension adjusting method for preventing a skew caused by a decrease in tension in a process of connecting a pair of wire ropes wound on both sides of a winding drum to ends of a trolley,
The tension of each of the wire ropes is detected by detecting the deflection or sag of each wire rope as the trolley is transported; And
And adjusting a tension of the wire rope to compensate for the sagging of the wire rope detected by the wire rope tension sensor. 8. The method of claim 7,
Wherein the sensing of sagging or sagging of the wire rope is detected by a sensing sensor connected between the wire rope and the trolley to detect a degree of sagging or sagging of the wire rope. 9. The method of claim 8,
Characterized in that the adjustment of the tension of the wire rope is performed by a tension adjusting means interposed between the detection sensor and the wire rope in proportion to the deflection or sagging of the wire rope by the detection sensor, A method of adjusting the tension of a rope. 10. The method of claim 9,
Wherein the proportional adjustment of the wire rope is carried out by adjusting or winding each wire rope according to the sagging or sagging degree of each wire rope.
KR1020140170064A 2014-12-01 2014-12-01 Trolley for tensioning the wire rope tensioning apparatus and a transfer method KR20160065699A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102152158B1 (en) * 2020-03-31 2020-09-04 (주)금호엘리베이터 Inclined elevator including deflection compensation device in the slope section
EP4056515A1 (en) * 2021-03-09 2022-09-14 Manitowoc Crane Group France Method for assistance in maintaining a metal cable of a device for lifting or transport

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0539365A (en) 1991-08-08 1993-02-19 Hitachi Chem Co Ltd Production of clutch facing
KR20000066572A (en) 1999-04-19 2000-11-15 이상호 Automatic anti-sway system for crane
JP5555440B2 (en) 2009-03-31 2014-07-23 三井造船株式会社 Quay crane

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0539365A (en) 1991-08-08 1993-02-19 Hitachi Chem Co Ltd Production of clutch facing
KR20000066572A (en) 1999-04-19 2000-11-15 이상호 Automatic anti-sway system for crane
JP5555440B2 (en) 2009-03-31 2014-07-23 三井造船株式会社 Quay crane

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102152158B1 (en) * 2020-03-31 2020-09-04 (주)금호엘리베이터 Inclined elevator including deflection compensation device in the slope section
EP4056515A1 (en) * 2021-03-09 2022-09-14 Manitowoc Crane Group France Method for assistance in maintaining a metal cable of a device for lifting or transport
FR3120620A1 (en) * 2021-03-09 2022-09-16 Manitowoc Crane Group France Method of maintenance assistance for a metal cable of a lifting or transport device

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