KR101180186B1 - Wire rope sling and method for manufacturing the same - Google Patents

Abstract

In the wire rope sling according to the present invention and a method for manufacturing the same, an end portion of the wire rope is bent in a ring shape to form an overlapping portion, and a ring portion is formed, and a fitting configured to fix the mutually overlapping portion to the mutually overlapping portion is provided. It is installed, by forming a hollow protective member tapered from the fitting toward the wire rope to protect the end of the wire rope exposed from the fitting, it is easy to manufacture the sling, mass production of uniform products An object of the present invention is to provide a wire rope sling and a method of manufacturing the same, which can be expected to improve productivity.

Description

WIRE ROPE SLING AND METHOD FOR MANUFACTURING THE SAME}

The present invention relates to a wire rope sling used for lifting or unloading heavy materials such as cargo, such as when unloading cranes, and a method of manufacturing the same.

A normal wire rope sling is crimped | bonded and fixed with the connection part of an eye part.

In the fixed structure using the fitting, both ends of the rope overlapped with each other have a stepped end, and the fittings connecting the ropes are more protruding than the ropes, so when the sling is used, the ends of the ropes, etc. are used. Problems such as catching parts or fittings are frequently caused, and this problem of rope jamming can eventually cause a great risk of unloading work due to disconnection of the wire rope, and a safety accident such as injuries of workers at sharp ends of metal wires. There is a problem with risk.

Looking at the prior art of wire rope slings to solve this problem.

1 is a perspective view of a conventional wire rope sling, which relates to a wire rope sling, an apparatus and a method for manufacturing the same.

The construction is formed of at least an end portion 132b of the wire rope 11, the hook portion 134 is formed, the metal fittings for fixing the wire rope 11 overlapping each other while forming the hook portion 134 ( 140 is installed, and the reinforcing member 150 is installed on at least one of both parts of the fitting 140 in the wire rope 11, the reinforcing member 150, wire rope 11 overlapping each other It is formed to have a tapered structure so as to be molded and installed in an insert injection molding method so as to be pressed and fixed to) and to eliminate the step between the fitting 140 and the wire rope 11 through a gentle slope. .

This conventional wire rope sling, its manufacturing apparatus and method, by lifting the weight of the wire rope (11) by the crane to move the injection molding machine side by one after setting the injection molding machine and then insert injection molding, insert again Since the injection-molded wire rope must be lifted and moved by a crane, the work is complicated and difficult, and the work time is long, resulting in problems in workability and productivity.

In addition, since the fitting and the synthetic resin are dissimilar materials with each other, the bonding strength between them is not only reduced, but also has a weak durability because it is formed of a synthetic resin material that is weak against external impact.

In addition, since the reinforcing member 150 is molded by injection molding using synthetic resin, the reinforcing member 150 is removed for safety inspection of the wire rope 11 in the reinforcing member 150 after completion or during use. There is a problem that must be done.

Figure 2 is a perspective view showing another conventional wire rope sling, which relates to a method for manufacturing a wire rope sling (Patent No. 0953381 (2010.04.20)).

Its configuration is to bend the two rope ends (200b) of the wire rope 11 in a ring shape and overlap the main line of the rope to form a ring portion (200c), the main line and the rope ends 200b of the wire rope 11 overlapping each other ) Is pressed and fixed with a metal fitting (101), the casting reinforcing material 102 of the metal material is integrally formed of molten metal using a casting jig (103) at one end of the exposed end of the rope from the fitting, and the casting The reinforcing material is formed with a taper 102a on the front side and an inclined end portion 102b on the rear side.

In the conventional wire rope sling, after the fitting crimping operation, the casting reinforcing material 102 is formed by a casting jig 103 formed of a separate upper mold 103a and a lower mold 103b. Since the mold is bolted and the molten metal is injected through the inlet 134 and the molten metal is cooled again, the work is complicated and difficult, and the working time is long, resulting in deterioration of workability and productivity.

In addition, due to the nature of the reinforcing material that does not require a large bonding force by filling it with a metal material there is a problem of lowering the work efficiency by not only waste of material but also a lot of weight.

In order to solve the above problems, the present invention provides a tapered hollow cylindrical protective member for covering the step portion appearing at the end of the wire rope overlap when forming an annular portion in the wire rope or when forming an endless type wire rope. It is an object of the present invention to provide a wire rope sling and a method of manufacturing the same, which prevents the wire rope sling from being broken or other parts being broken by being caught by another part of the wire rope by installing the stepped portion.

In addition, the present invention continuously checks whether the wire rope sling is abnormal after the completion of the product by installing a check hole for crimping the wire rope overlap with the fitting to check whether the end of the wire rope end caused by excessive compressive force at the time of fixing It is an object of the present invention to provide a wire rope sling and a method of manufacturing the same.

In addition, an object of the present invention is to provide a wire rope sling and a method of manufacturing the same, which can contribute to productivity improvement by allowing the wire rope sling to be produced by a single process of simply pressing a protective member to the fitting of the wire rope sling.

In addition, an object of the present invention is to provide a wire rope sling and a method for manufacturing the same, which can minimize the weight and manufacturing cost of the product by producing a lightweight product because the protective member is formed in a hollow structure.

In addition, the present invention increases the coupling force of the fitting and the protective member due to the protrusion formed on the inner surface of the protective member when the protective member is pressed to the fitting of the wire rope sling to minimize the departure of the protective member, thereby contributing to the improvement of product quality It is an object of the present invention to provide a wire rope sling and a method of manufacturing the same.

As a means for solving the above problems, the wire rope sling of the present invention,

The end of the wire rope is bent in a ring shape to form an overlapping portion, thereby forming a hook portion,

Fittings configured to fix the mutually overlapping portions are installed on the mutually overlapping portions,

The fitting is installed on the fitting for protecting the end of the wire rope exposed from the fitting,

The protective member has a hollow structure tapered from the fitting toward the wire rope.

In addition, the wire rope sling of the present invention,

The wire rope is bent to form overlapping parts,

Fittings configured to fix the mutually overlapping portions are installed on the mutually overlapping portions,

Protective members are installed on both sides of the fitting to protect the ends of the wire rope exposed from the fitting,

The protective member has a hollow structure tapered from the fitting toward the wire rope.

One or more inspection holes are formed in the protection member so as to check the ends of the wire rope exposed from the fitting.

And the protection member is formed with a projection to tighten the fitting.

Moreover, this invention is a manufacturing method for manufacturing said wire rope sling,

Wire rope preparation step of preparing wire rope to set length,

Forming a loop part by bending the rope end of the wire rope in an annular shape and then overlapping the main line of the rope to form a loop part;

Fixing the fitting step of fixing the fitting in a state in which the rope end portion is projected from the fitting portion to the portion where the main line and the rope end of the wire rope overlap each other in the ring forming step,

And a protection member fixing step of clamping and securing the protection members to the fittings respectively by pressing.

Moreover, this invention is a manufacturing method for manufacturing said wire rope sling,

Wire rope preparation step of preparing wire rope to set length,

Bending and forming the overlapping portion to bend the wire rope so that both rope ends overlap.

Fixing step of fixing the fitting to the lap chip,

Protecting members are fixed to each end of the fitting by biting the fittings to the fittings and pressing and fixing them.

Through the problem solving means as described above, the present invention can prevent the safety accident due to the stepped portion of the wire rope by forming a tapered protective member, wire rope sling by coupling the protective member to the fitting in a single pressing process Significantly shorten the production process, even mass production of uniform products, even if not skilled workers can contribute to the productivity improvement, and can produce a lightweight product through a hollow cylindrical protective member, minimizing the production cost of the product, When the protection member is pressed onto the fitting of the wire rope sling, the protrusion formed on the protection member enhances the coupling force between the fitting and the protection member, thereby minimizing the problem of detachment or damage of the protection member, thereby improving the product quality. Protective member to check the condition of the end of the rope By forming the check holes it is easy to determine abnormality of the rope sling and there is an effect that can contribute to the safety of the operation.

1 is a perspective view and a partially enlarged view showing a wire rope sling of the prior art.
2A and 2B show another prior art wire rope sling.
3 is a perspective view and a partially enlarged view showing a locking-type wire rope sling that is an embodiment of the present invention.
4 is a sectional view showing the protection member of the present invention.
5 is a perspective view of the protective member of FIG. 4.
FIG. 6 is a perspective view illustrating still another embodiment of the protective member of FIG. 5. FIG.
FIG. 7 is a diagram illustrating an endless-type wire rope sling, which is another embodiment of the present invention.
FIG. 8 is a view illustrating a crimping and fixing process of a fitting and a protection member of a locking-type wire rope sling according to an embodiment of the present invention.
Figure 9 is a view showing a locking-type wire rope sling manufacturing method of an embodiment of the present invention.
FIG. 10 is a view illustrating an endless-type wire rope sling manufacturing method according to another embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

First, a locking-type wire rope sling that is an embodiment of the present invention will be described.

3 is a perspective view and a partially enlarged view showing a locking-type wire rope sling that is an embodiment of the present invention.

As shown in FIG. 3, the wire rope sling 10 according to an embodiment of the present invention has an eye, ie, a hook portion at both ends of the wire rope 11 manufactured by twisting a plurality of strands of metal wires. 13a and 13b are formed, respectively.

The hook portions 13a and 13b are formed by bending the ends 14a and 14b of the wire rope 11 in a ring shape and then fixing the overlapping portions in a state where they are overlapped with the main lines 12a and 12b of the wire rope. .

The overlapping part is fixed by using fittings 20a and 20b made of metal, synthetic resin, and the like.

The fittings 20a and 20b are preferably made of a metallic material such as aluminum, a synthetic resin material, and the like. The wire rope main line 12a is formed by crimping and fixing using a press or the like that is commonly used for overlapping portions of the wire rope 11. 12b) and the wire rope end portions 14a and 14b serve to maintain a firm fixed state with each other.

At this time, the ends of the wire rope 11 that is configured on the opposite side of the ring portion (13a, 13b) around the fitting (20a, 20b), that is exposed from the fitting (20a, 20b) as shown in the enlarged view of FIG. Protective members 30a and 30b provided to cover the portions 14a and 14b are pressed against a part of the ends of the fittings 20a and 20b.

To this end, as shown in FIGS. 4 and 5, the protection members 30a and 30b are connected to the connection portions 31a and 31b into which parts of the fittings 20a and 20b are inserted, and wire ropes from the fittings 20a and 20b. Conical tapered portions 32a, 32b inclined toward the side thereof and flat portions 33a, 33b having a length and a diameter sufficient to cover a portion of the outer circumferential surface of the wire rope.

In addition, as shown in FIG. 4, protrusions 34a and 34b are formed on the inner surfaces of the connecting portions 31a and 31b, and the protective members 30a and 30b may be pressed onto the fittings 20a and 20b. At this time, the protrusions 34a and 34b penetrate the outer surfaces of the fittings 20a and 20b so that the fittings 20a and 20b and the protection members 30a and 30b can be firmly coupled to each other.

In addition, the remaining amount of wires of the rope ends 14a and 14b protruding from the fittings 20a and 20b and present inside the protection members 30a and 30b, and the metal wires of the wire rope ends 14a and 14b are released. Check holes 35a and 35b are formed in portions where the fittings 20a and 20b are not inserted or tapered portions 32a and 32b of the connecting portions 31a and 31b so as to visually check whether any abnormality occurs. 32a and 32b form the hollow inside of the hollow shape.

In general, when the fittings 20a and 20b are crimped and fixed to the wire ropes, excessive compressive force causes fatigue due to excessive stress on the wire ropes inside the fittings 20a and 20b. When the tensile stress is repeatedly applied due to problems such as the loss of the wire rope end element wires and the unscrewing of the loop due to this result in a safety accident, as shown in Figures 3 to 5, in the present invention Through the inspection holes (35a, 35b) can always monitor the state of the end of the wire rope it is possible to prevent the occurrence of a safety accident in advance.

The material of the protection members (30a, 30b) is preferably made of any one of aluminum, aluminum alloy, Fe alloy, synthetic resin material or formed of a material having a higher bursting strength than the fitting.

On the other hand, the coupling strength of the sling depends on the compressive strength of the fittings, and since the protective members 30a and 30b simply cover the ends of the rope to protect them, the thickness of the protective members 30a and 30b is thinner than the thickness of the fittings. You can do it.

The protective member 30a, 30b is preferably formed in a tapered structure in which the diameter gradually decreases toward the central portion of the rope from the fitting portion 20a, 20b, which is a step of the wire rope when the wire rope sling 10 is used. The purpose is not to get caught in the external structure.

As shown in FIG. 6, a plurality of elongated slits 51 are connected to the connection portions 31a and 31b of the protection members 30a and 30b instead of the inspection holes 35a and 35b of the protection members 30a and 30b. It may be configured to prevent the distortion caused by the shrinkage of the cross-section of the connecting portion during pressing by the press, and can also be used for the purpose of the inspection hole.

The slit 51 may be connected to the tapered portions 32a and 32b.

Hereinafter, an endless-type wire rope sling which is another embodiment of the present invention will be described.

7 is a view showing an endless-type wire rope sling which is another embodiment of the present invention.

As shown in FIG. 7, the wire rope sling 10 according to another embodiment of the present invention fixes the overlapping portion in a bent state so that both ends of the wire rope 11 made by twisting several strands of metal wires overlap. It is formed by.

The overlapping part is fixed using a fitting 20c made of a metal material, a synthetic resin material, or the like.

And, the protection is provided so as to cover the ends (14c, 14d) of the wire rope 11 is configured on both sides around the fitting (20c), that is, exposed from the fittings (20a, 20b) as shown in FIG. The members 30c and 30d are pressed against a part of both ends of the fitting.

The shape and structure of the fitting and the protection member are the same as the shape and structure of the fitting and the protection member used in the locking-type wire rope sling 10 described above.

Hereinafter, a method of manufacturing a locking-type wire rope sling according to the present invention will be described with reference to FIGS. 8 and 9.

First, to prepare the wire rope sling 10 by cutting the wire rope 11 to a predetermined length (S1).

Subsequently, the one end of the wire rope is bent in an annular shape and then overlapped with the main line 12a of the rope to form one side ring portion 13a (S2), and one side fitting 20a and one side protection on the wire rope 11. Each of the members 30a are sequentially inserted (S3), and as shown in FIG. 8A, the rope end is formed at a portion where the main line 12a of the wire rope and the one end of the rope 14a overlap each other. One side fitting 20a is fixed in the state which made it protrude a fixed part from fitting 20a, and is crimped | bonded by press etc. (S4).

As shown in b of FIG. 8, the one side protection member 30a is bitten by the one side fitting 20a, and the one side protection member 30a is pressed onto the one side fitting 20a by using a press or the like. It is fixed (S5).

After the one end of the ring operation is completed, the other side for the ring operation, the other side of the protection member 30b and the other fitting 20b is inserted in turn (S6), the other end of the wire rope 11 ring-shaped After bending to form the other ring portion 13b by overlapping with the main line 12b of the rope (S7), as shown in a of Fig. 8, the main line 12b and the other rope end 14b of the wire rope In the state where the rope overlaps with each other), the other end 20b is fixed in a state where the rope end is protruded from the other fitting 20b, and is pressed into a press or the like (S8).

As shown in b of FIG. 8, the other side protection member 30b is bitten by the other side fitting 20b, and then the other side protection member 30b is pressed onto the other side fitting 20b by using a press or the like. Fixing to form a wire rope sling 10 (S9).

Hereinafter, with reference to FIG. 10, an endless-type wire rope sling manufacturing method according to the present invention will be described.

First, to prepare the wire rope sling 10 by cutting the wire rope 11 to a predetermined length (S1).

Subsequently, a fitting and a protection member are inserted in the wire rope 11 in the order of one protection member 30c, the fitting 20c, and the other protection member 30d (S2), and the wire rope 11 is bent to one side rope. The other end of the end portion 14c overlaps the rope end portion 14c so that the overlapping portion is formed (S3), and the fitting portion 20c is fixed to the overlapping portion and press-processed by pressing or the like (S4).

Then, the one side protection member 30c is bitten to one side of the fitting 20c, and then the one side protection member 30c is pressed and fixed to one side of the fitting 20c by using a press or the like (S5).

After fixing one side protection member 30c in this way, the other side protection member 30d is clamped on the other side of the fitting 20c, and the other side protection member 30d is pressed and fixed to the other side of the fitting 20c by using a press or the like. Form a wire rope sling (S6).

Although the wire rope sling according to the present invention and the manufacturing method thereof have been described in detail, this is only for describing the most preferred embodiment of the present invention, and the present invention is not limited thereto, and according to the appended claims Range is determined and defined. In addition, any person of ordinary skill in the art may make various modifications by the description of the specification of the present invention, but it will be apparent that this is not outside the scope of the present invention.

10: wire rope sling 11: wire rope
12a, 12b: rope main line 13a, 13b: ring part
14a, 14b: rope ends 20a, 20b, 20c: fittings
30a, 30b, 30c, 30d: protective member 31a, 31b: connecting portion
32a, 32b: taper 33a, 33b: flat
51: slit

Claims (9)

The end of the wire rope is bent in a ring shape to form an overlapping portion, thereby forming a hook portion,
Fittings are provided to fix the mutually overlapping portions to the mutually overlapping portions,
The fitting is installed on the fitting for protecting the end of the wire rope exposed from the fitting,
The protective member is a wire rope sling, characterized in that the hollow structure tapered from the fitting toward the wire rope The wire rope is bent to form overlapping portions at both ends,
Fittings are provided to fix the mutually overlapping portions to the mutually overlapping portions,
Protective members are installed on both sides of the fitting to protect the ends of the wire rope exposed from the fitting,
The protective member is a wire rope sling, characterized in that the hollow structure tapered from the fitting toward the wire rope The method according to claim 1 or 2,
The protection member, the wire rope sling, characterized in that at least one inspection hole is formed to confirm the end of the wire rope exposed from the fitting The method according to claim 1 or 2,
Wire rope sling, characterized in that the protective member is formed with a projection to tighten the fitting In the manufacturing method of the wire rope sling of Claim 1,
Wire rope preparation step of preparing wire rope to set length,
Forming a loop part by bending the rope end of the wire rope in an annular shape and then overlapping the main line of the rope to form a loop part;
Fixing the fitting step of fixing the fitting in a state in which the rope end portion is projected from the fitting portion to the portion where the main line and the rope end of the wire rope overlap each other in the ring forming step,
Method of manufacturing a wire rope sling, characterized in that it comprises a step of fixing the protection member to each of the fittings to the fitting by pressing and pressing by pressing In the manufacturing method of the wire rope sling of Claim 2,
Wire rope preparation step of preparing wire rope to set length,
Bending and forming the overlapping portion to bend the wire rope so that both rope ends overlap.
Fixing step of fixing the fitting to the lap chip,
Method for manufacturing a wire rope sling, characterized in that the protective member fixing step of fixing the pressing member by pressing each of the protective member to each end of the fitting by pressing. The method according to claim 5 or 6,
The protection member, the manufacturing method of the wire rope sling, characterized in that at least one inspection hole is formed so as to check the state of the end of the wire rope exposed from the fitting The method according to claim 5 or 6,
The protective member, a method of manufacturing a wire rope sling, characterized in that a projection is formed to tighten the fitting. The method according to claim 5,
Between the wire rope preparation step and the ring forming step, the wire rope sling, characterized in that the wire rope sling is further provided with a protective member and a fitting inserting step in order to the wire rope in order to the protective member and the fitting in order respectively;

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