WO2008044855A1

WO2008044855A1 - Wire rope ring for cargo-working and method for manufacturing the same

Info

Publication number: WO2008044855A1
Application number: PCT/KR2007/004915
Authority: WO
Inventors: Dae Yeng Kim
Original assignee: Goryo E N G
Priority date: 2006-10-09
Filing date: 2007-10-09
Publication date: 2008-04-17
Also published as: KR20080033084A; KR100823546B1

Abstract

Disclosed herein are a wire rope ring for cargo loading work and a method of manufacturing the same. The wire rope includes a wire rope, a plurality of joints, and reinforcement members. The wire rope is disposed to form a ring-type structure. The joints are fastened to the overlapping portion of the wire rope at regular intervals through pressing. The reinforcement members are located between the plurality of joints and outside the joints, and are formed on the overlapping portion of the wire rope using synthetic resin material in a compression manner. Thus, the security and stability of a rope connection part can be increased and the usable lifetime thereof can also be extended.

Description

[DESCRIPTION]

[invention Title]

WIRE ROPE RING FOR CARGO-WORKING AND METHOD FOR MANUFACTURING THE SAME

[Technical Field]

The present invention relates to a wire rope ring that is used to load and unload heavy items, such as freight, and, more particularly, to a wire rope ring for cargo loading work, which allows the two ends of a rope to be securely and stably connected to each other using joints, which are made of metal material, and reinforcement members, which are made of nonmetallic material.

[Background Art]

A wire rope ring is used to lift up and put down heavy items, such as freight, when crane cargo loading work is performed. Such a wire rope ring is formed to have a ring-type structure, and is generally connected between the hook of a crane and a cable, which is used to bind freight, for the use thereof. In order to allow the wire rope ring to have a ring- type structure, the ends of the rope are connected to each other and are fastened. In this case, various methods, including a method of performing pressing and fastening using a fastening wire, joints, or the like, are used.

Here, the wire rope ring is used to load or unload heavy items that impose a large load, and thus the connection thereof must be kept secure so that the connection portion is not loosened or cut.

However, in the conventional wire rope ring, a connection part is fastened using only joints, so that it is difficult to keep the connection of the rope secure and stable. In order to solve this problem, a large number of fastening members, such as joints, may be used. However, in this case, a problem occurs in that a high manufacturing cost is incurred, attributable to the number of fastening members .

Furthermore, the connection part of the conventional wire rope ring is pressed and fastened using joints in the state in which the two ends of the rope overlap each other, so that it becomes relatively thicker than other parts . In this state, the two sides of the overlapping portion have respective stair-shaped ends and, in addition, the joints, which are generally used for the connection of the rope, protrude further relative to the rope, so that a problem in which the ends of the rope, or the joints, are caught in surrounding structures during the use of the wire frequently occurs. This rope interference problem may ultimately cause considerable danger when performing cargo loading work if the connection part of the wire rope becomes disconnected. Furthermore, a problem occurs in that the cargo loading work is interrupted at the time of interference with surrounding structures .

Furthermore, in the case where the wire rope ring is connected using only the joints for the use thereof, there is a problem in that the external appearance thereof is worsened by the structure, which protrudes further relative to the rope.

In addition to the above-described problems, the conventional wire rope ring is generally manufactured by weaving several strands of metal wire, which are twisted together and, thus, pieces of sharp metal wire are exposed at both ends of the rope, so that a problem occurs in that there is the danger of occurrence of accidents, for example, workers may be hurt by the sharp ends during the use of the wire rope ring.

[Disclosure] [Technical Problem]

Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide a wire rope ring for cargo loading work and a method of manufacturing the same, which allow reinforcement members to come into close contact with a wire rope by fastening the two ends of the wire rope, which overlap each other, using a plurality of joints, and additionally fastening portions located between the joints and both sides of each joint using the reinforcement members, thus not only increasing the coupling force of a connection part but also preventing the joints from being moved, with the result that the security and stability of the rope connection part can be increased and the usable lifetime thereof can be extended.

Another object of the present invention is to provide a wire rope ring for cargo loading work and a method of manufacturing the same, which allow the joints, which are made of metallic material, and the reinforcement members, which are made of synthetic resin material, to be alternately arranged for the use thereof, thus preventing the increase of a load, which may occur in the case where only metallic material is used, and preventing the connection part from being damaged and corroded, as well as increasing the ability to withstand a tension load.

A further object of the present invention is to provide a wire rope ring for cargo loading work, which is configured such that the number of portions that can be caught, due to the ends of the rope, which overlap each other, and to the joints, is minimized, thus solving problems, such as rope disconnection and work disturbance, by solving the problem of interference with surrounding ropes or surrounding structures during the storage, transfer and use of the rope.

Yet another object of the present invention is to provide a wire rope ring for cargo loading work, which allows the reinforcement members to be installed so as to contain the ends of the rope, which overlap each other, so that the sharp ends of the wire are not exposed, with the result that the external appearance can be improved and, in addition, the wire rope can be prevented from being loosened, and, in particular, prevents workers from being hurt by the sharp ends, thus improving safety.

[Technical Solution]

In order to accomplish the above objects, the present invention provides a wire rope ring for cargo loading work, including: a wire rope disposed to form a ring-type structure, and arranged such that the two ends thereof overlap each other; a plurality of joints fastened to the overlapping portion of the wire rope at regular intervals through pressing, the joints being made of metallic material so that the wire rope is connected in the ring- type structure; and reinforcement members located between the plurality of joints and outside the joints, and formed on the overlapping portion of the wire rope using synthetic resin material in a compression manner; wherein the reinforcement members comprise a first member, which is formed to have a cylindrical structure and is located between the plurality of joints, and second members, which are formed to have a tapered structure and are located so as to contain one end of the overlapping wire rope outside the joints, rather than between the joints. The reinforcement members are formed to have an external diameter identical to those of the joints so as not to be caught in external structures.

Furthermore, of the reinforcement members, the first member is made of hard synthetic resin material, and the second members are made of soft synthetic resin material.

Furthermore, the joints are configured such that prominences are formed on the side surfaces thereof so as to increase coupling force with the reinforcement members.

In addition, the present invention provides a method of manufacturing the wire rope ring for cargo loading work, including the steps of: disposing the wire rope in a ring- type structure, and arranging two ends of the wire rope so as to overlap each other; fastening the plurality of joints to the portion of the wire rope, which is overlapped in the previous step, through pressing; and putting a connection part of the wire rope, in which the joints are pressed, in an injection mold, forming the reinforcement members through compression, and cooling the formed reinforcement.

[Advantageous Effects] The wire rope ring for cargo loading work and the method of manufacturing the same according to the present invention have the following effects.

First, the reinforcement members are brought into close contact with the wire rope by fastening the two ends of the wire rope, which overlap each other, using a plurality of joints, and additionally fastening the portions, which are located between the joints, and the two sides of each joint using the reinforcement members, so that the coupling force of the connection part can be increased and, in addition, the joints can be prevented from being moved, with the result that the security and stability of the rope connection part can be increased and the usable lifetime thereof can be extended.

Next, the present invention allow the joints, which are made of metallic material, and the reinforcement members, which are made of synthetic resin material, to be alternately arranged for the use thereof, thus preventing an increase in the load, which may occur in the case where only metallic material is used, and preventing the connection part from being damaged and corroded, as well as increasing the ability to withstand a tension load.

Furthermore, the preset invention is configured such that the number of portions that can be caught, due to the ends of the rope, which overlap each other, and to the joints, is minimized, thus solving problems, such as rope disconnection and work disturbance, by solving the problem of interference with surrounding ropes and surrounding structures during the storage, transfer and use of the rope.

Furthermore, the present invention allows the reinforcement members to be installed so as to contain the ends of the rope, which overlap each other, so that the sharp ends of the wire are not exposed, with the result that the external appearance can be improved and, in addition, the wire rope can be prevented from being loosened, and, in particular, prevents workers from being hurt by the sharp ends, thus improving safety.

[Description of Drawings]

FIG. 1 is a schematic perspective view showing the use of a wire rope ring for cargo loading work according to the present invention;

FIG. 2 is a perspective view of the wire rope ring for cargo loading work according to the present invention;

FIG. 3 is a sectional view of the wire rope ring for cargo loading work according to the present invention; FIG. 4 is a view showing a forming machine for manufacturing the wire rope ring for cargo loading work according to the present invention;

FIG. 5 is a sectional view showing another embodiment of the wire rope ring for cargo loading work according to the present invention; and FIG. β is a sectional view of a wire rope sling for cargo loading work according to the present invention.

[Best Mode]

Referring to FIGS. 2 and 3, a wire rope ring 10 according to the present invention for cargo loading work includes a wire rope 12 disposed to form a ring-type structure, and arranged such that the two ends thereof overlap each other; a plurality of joints 17 fastened to the overlapping portion of the wire rope at regular intervals through pressing, the joints being made of metallic material, so that the wire rope is connected in a ring-type structure; and reinforcement members 20, located between the plurality of joints 17 and outside the joints, and formed on the overlapping portion of the wire rope 12 using synthetic resin material in a compression manner; wherein the reinforcement members 20 comprise a first member 21, which is formed to have a cylindrical structure and is located between the plurality of joints, and second members 22, which are formed to have a tapered structure and are located so as to contain one end of the overlapping wire rope 12 outside the joints, rather than between the joints .

Furthermore, a method of manufacturing the wire rope ring for cargo loading work according to the present invention includes steps of disposing the wire rope 12 to form a ring-type structure, and arranging the two ends of the wire rope so as to overlap each other; fastening the plurality of joints 17 to the portion 12 of the wire rope, which is overlapped in the previous step, through pressing; and putting the connection part 15 of the wire rope 12, in which the joints 17 are pressed, in an injection mold, forming the reinforcement members 20 in a compression manner, and cooling the formed reinforcement.

[Mode for Invention] Preferred embodiments of the present invention are described with reference to the accompanying drawings below.

FIG. 1 is a schematic perspective view showing the use of a wire rope ring for cargo loading work according to the present invention.

As shown in FIG. 1, the wire rope ring 10 for cargo loading work (hereinafter referred to as a ^Λwire rope ring' ) according to the present invention is connected between a hook 3 of a crane 1 and a hook 7 provided on freight 5 for the use thereof.

The above-described wire rope ring 10 is classified as various types: the ring-type wire rope ring, shown in FIG. 1, the ^ΛI' type wire rope ring, shown in FIG. 6, and other types. The ring-type embodiment, shown in FIGS. 1 to 5, is described below.

FIG. 2 is a perspective showing the wire rope ring according to the present invention, and FIG. 3 is a sectional view showing the internal structure of a connection part in the wire rope ring, shown in FIG. 2.

The wire rope 12 is made of several strands of metal wire twisted together. When the two ends of the wire rope 12 are fastened using both joints 17 and reinforcement members 20 in the state in which the ends of the wire rope 12 overlap each other, the wire rope ring 10, shown in FIG. 2, is constructed.

Now, in the wire rope ring 10 of the present invention, the structure of a connection part 15 using both the joints 17 and the reinforcement members 20 is described in detail below.

First, it is preferred that the joints 17 be made of metallic material. The joints 17 are responsible for making the connection of the wire rope 12 secure by causing the overlapping portion of the wire rope 12 to be fastened through pressing using a typical press.

It is preferred that the above-described joints 17 be made of typical aluminum material . As shown in the drawings, a plurality of joints 17 is installed on the overlapping connection part 15 of the wire rope 12 and are spaced apart from each other at regular intervals. Preferably, the respective joints 17 may be pressed and installed on both sides of the connection part 15, as seen in the drawings .

Subsequently, it is preferred that the reinforcement members 20 be made of synthetic resin material, such as PE or PP, which differs from the material of the joints 17. The reinforcement members 20 are installed on the respective sides of the joints 17 and between the joints 17 in a compression molding manner.

Accordingly, the reinforcement members 20 are attached and fastened to the surface of the wire rope in close contact with the surface of the wire rope, so that they can not only enhance the coupling force of the connection part 15 of the wire rope but also prevent the joints 17 from moving, therefore the fastening can be prevented from being loosened.

The above-described reinforcement members 20 are classified into two types: a first member 21, which is formed between joints 17, and second members 22, which are formed in respective sides of the joints 17 and contain respective ends of the wire rope 12.

The first member 21 is formed to have a cylindrical structure. In this case, it is preferred that the external diameter of the first member 21 be formed to be the same as or slightly greater than those of the joints 17, which come into contact with the respective sides of the first member 21. This serves to prevent the phenomenon whereby the wire rope ring 10 is caught in external structures when the wire rope ring 10 is used.

The above-described first member 21 is responsible for keeping the fastening stable by being inserted between the joints 17 and preventing the joints 17, which come into contact with the respective sides of the first member 21, from moving, but also for solving the problem in which the ends of the joints 17, which protrude from the rope, are caught in external structures . The second members 22 are formed to have a tapered structure. In this case, it is preferred that the portions that come into contact with the joints 17 be formed to have almost the same external diameters as those of the first member 21, and be formed such that the external diameters thereof are gradually decreased as the distance spaced apart from the joints 17 is further increased.

The above-described second members 22 are responsible not only for solving the problem in which the outsides of the joints 17 are caught, but also for solving the problem in which the joints 17 are caught by preventing generation of the step difference between the two ends of the rope. In addition, the second members 22 are also responsible for solving problems in which the rope is loosened or users are hurt by the sharp ends by preventing the pieces of metal wire, which are exposed at the ends of the rope, from being exposed to the outside. Furthermore, the second members 22 are responsible for protecting and supporting the fastening of the joints 17 at the outsides of the joints 17.

Materials for forming the first member 21 and the second members 22, having the above-described functions, are described below.

All of the first member 21 and the second members 22 are made of synthetic resin material. It is preferred that the first member 21 be made of hard synthetic resin material (for example, PP material) because it is located between the two joints 17, and that the second members 22 be made of soft synthetic resin material (for example, PE material) so as to be easily bent because they are located at the outsides of the joints 17. Alternatively, all of the first member 21 and the second members 22 may be made of soft synthetic resin material, or may be made of hard synthetic resin material.

It should be noted that, in the case where the second members 22 are made of hard synthetic resin material and are installed at a position where they must be bent relatively often, they may break or crack, so that it is preferred that, where possible, the second members 22 be made of soft synthetic resin material.

Although an example of use of preferred materials for the first member 21 and the second members 22 has been proposed above, the first member 21 and the second members 22 may be implemented in various ways using various kinds of resin materials according to the implementation conditions .

Meanwhile, the reinforcement members 20 are made of synthetic resin material, unlike the joints 17, which are made of metallic material. Accordingly, if the reinforcement members 20 are made of colored synthetic resin material, configuration can be made such that colors vary in order of the second member 22, the joint 17, the first member 21, the joint 17 and the second member 22 from the left of FIG. 2, so that a fine external appearance of the wire rope ring can be realized and an advantage in that the market appeal of the product is increased can also be achieved. The method of manufacturing the wire rope ring 10 according to the present invention, constructed as described above, is described below.

First, the two ends of the wire rope 12 are arranged so that they overlap each other, and the joints 17, which are made of metallic material, are fastened through pressing using a press.

In this case, the joints 17 may be fastened through pressing after the two ends of the wire rope 12 are coupled while being twisted together. In the state in which the wire rope 12 is formed to have the circular ring structure described above, the reinforcement members 20 are installed using a reinforcement member former 30 as shown in FIG. 4.

That is, when the rope connection part 15, to which the joints 17 are installed, is located in a mold 40 for compression injection molding and then a forming machine is operated, the driving part 33 of the forming machine is operated, so that a synthetic resin solution is injected into the mold 40 through an injection nozzle 37 while the screw of a melting part 35 rotates, therefore the reinforcement members 20 are formed in the rope connection part 15. Subsequently, the process of cooling the reinforcement members 20 is performed.

Here, when the reinforcement members 20 are formed in an injection molding manner, it is preferred that the joints 17 be formed such that the circumferential surfaces thereof are not covered with the reinforcement members 20. The reason for this is because, in the case where the reinforcement members are formed at the circumferential surfaces of the joints 17, problems occur in that economic efficiency is lowered because the amount of material that is used is increased, and in that the reinforcement members 20 may easily peel off during the use thereof because the reinforcement members 20 are additionally provided around the joints. In the case where the reinforcement members 20, which are formed at the circumferential surfaces of the joints 17, are peeled off as described above, there are problems in that the external appearance is greatly degraded, and in that damage occurs, for example, the first member 21 and the second members 22, which are located between the joints 17 and outside the joints 17, become separated due to such peeled-off portions .

In the case where the material of the first member 21 is the same as that of the second members 22, the above- described forming machine may simultaneously form both the first member 21 and the second members 22. Furthermore, in the case where the material of the first member 21 differs from that of the second members 22, the above-described forming machine may form the first member 21 and the second members 22 separately. In FIG. 4, reference numeral 31 indicates a hopper for injecting resin material, and reference numeral 39 indicates a mold support to which the mold 40 is mounted.

Meanwhile, in order to reinforce the connection part 15 of the wire rope ring 10, joints 17 may be processed so that the usable lifetime thereof can be further extended without requiring the use of the reinforcement members 20. This may lower the ability of the rope to be bent, and may act as a factor that increases the total weight of the wire rope ring 10. Furthermore, the joints 17 are generally made of expensive aluminum. In this case, the total cost of the wire rope ring 10 is increased. Accordingly, the reinforcement members 20, which are formed close to the joints 17 in a compression manner, are used, as in the present invention, and thus the manufacturing costs can be reduced, along with the reduction of the load.

FIG. 5 is a view showing another embodiment of the present invention, and shows a structure in which prominences 17a are formed so as to increase the coupling force between the reinforcement members 20 and the joints 17.

That is, the prominences 17a, which are continuous in the circumferential direction of a circle, are formed in the side surfaces of the joints 17, and are coupled to each other when the reinforcement members 20 are formed, so that the coupling force between the joints 17 and the reinforcement members 20 is increased, therefore the installation of the joints 17 and the reinforcement members 20 can be kept stable.

Although, in the drawing, the prominences 17a are illustrated as having a protruding structure, they may be formed to have a depressed structure according to the implementation conditions. Furthermore, the side surfaces of the joints 17 may be formed to have a stepped structure.

FIG. 6 is a view showing an I-type wire rope sling 10' , which differs from the wire rope sling having the above-described structure. The joints 17' and the reinforcement members 20' , which are used as above, can be used in the same manner.

That is, in order to form one ring of a rope 12' , as in FIG. β, one end of the rope may be fastened to the middle of the rope using a joint 17' , and respective reinforcement members 20' may be installed on the exposed ends of the rope 12' based on the joints 17' .

In this case, it is preferred that the reinforcement members 20' be formed to have a tapered structure, as in the above-described second members 22.

Claims

[CLAIMS]

[Claim l]

A wire rope ring for cargo loading work, comprising: a wire rope disposed to form a ring-type structure, and arranged such that two ends thereof overlap each other; a plurality of joints fastened to an overlapping portion of the wire rope at regular intervals through pressing, the joints being made of metallic material so that the wire rope is connected in the ring-type structure; and reinforcement members located between the plurality of joints and outside the joints, and formed on the overlapping portion of the wire rope using synthetic resin material in a compression manner; wherein the reinforcement members comprise a first member, which is formed to have a cylindrical structure and is located between the plurality of joints, and second members, which are formed to have a tapered structure and are located so as to contain one end of the overlapping wire rope outside the joints, rather than between the joints.

[Claim 2]

The wire rope ring according to claim 1, wherein the reinforcement members are formed to have an external diameter identical to those of the joints so as not to be caught in external structures .

[Claim 3]

The wire rope ring according to claim 1 or 2, wherein, of the reinforcement members, the first member is made of hard synthetic resin material, and the second members are made of soft synthetic resin material.

[Claim 4]

The wire rope ring according to claim 1 or 2, wherein the joints are configured such that prominences are formed on side surfaces thereof so as to increase coupling force with the reinforcement members.

[Claim 5]

A method of manufacturing the wire rope ring for cargo loading work, described in claim 1, comprising the steps of: disposing the wire rope in a ring-type structure, and arranging two ends of the wire rope so as to overlap each other; fastening the plurality of joints to the portion of the wire rope, which is overlapped in the previous step, through pressing; and putting a connection part of the wire rope, in which the joints are pressed, in an injection mold, forming the reinforcement members through compression, and cooling the formed reinforcement.