JPH11279963A - Connection structure of wire rope for construction machine and built-in method for wire rope using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a joint structure for wire ropes that scarcely occurs fluctuation and deviation in the joint strength between workers with a high level of the minimum joint strength, in addition, shows high conformability, when the joint structure passes a pulley or the like, and good workability. SOLUTION: This joint construction is constituted by intertwisting two wire ropes 23 around the steel core 24 with a plurality of strands 25. Individual ends of wire ropes 23 are inserted from the opposing direction into the sleeve 26 and this sleeve 26 is pressed with a pressing device thereby connecting the wire rope. In this joint construction, the overlapping part 24a of only core wires 24, after the strands are removed, is formed on the edges of individual wire ropes and the overlapping part 24a is inserted into the sleeve 26 and the overlapping part 24a are pressed in their overlapped state in the sleeve 26.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection structure of a wire rope for a construction earth-moving device and a method of assembling the wire rope to the device.

[0002]

2. Description of the Related Art As shown in FIGS. 6 and 7 of the present invention, a wire rope of this type is incorporated into a lifting machine and is very large (several hundreds to several hundreds). It is used when a load (on the order of tons) is received, and has a wire diameter of at least 10 mm or more. Structurally, a twisted rope in which a plurality of strands (small ropes) are twisted around a core wire (core) is generally used. In addition, this wire rope is used by being built into the construction equipment, but when it is worn out by continuous use and replaced with a new one, as a replacement method,
For example, it is often the case that the end of the old wire rope is connected to the end of the new wire rope, and the old rope is wound up so that the old rope is continuously replaced with the new rope. In this work, the connection structure between the wire ropes is the first
Second, from the viewpoint of safety, the joint strength is large, and there is little variation by the operator (fluctuation in the joint strength due to the skill of the operator). Second, the connection part is well adapted when passing through a pulley or the like from the viewpoint of use form. Third, it must satisfy conditions such as not being caught by guide fittings provided on pulleys or the like for preventing the wires from coming off, and thirdly, from the viewpoint of workability, the joining operation can be performed reliably and easily even on sites where the scaffold is not stable, such as on a ship. Must.

FIG. 8 shows a conventional example of such a connection structure. FIG. 8A shows a structure for connection using a cable grip 20. After each end of each of the wire ropes 23 is inserted into the corresponding sock portion 20a, the wire ropes 23 are pulled away from each other. It will be locked. FIGS. 8B and 8C show a connection structure by welding. 8B is connected to the end faces of the respective ends of the wire rope 23 via brackets 22a and 22b which are welded (the reference numeral 21a is a welded portion). FIG.
(C) is a structure in which each end of the wire rope 23 is formed on the inclined surface 23a by gas cutting, and is joined by welding (the portion indicated by reference numeral 21b is a welded portion) with the inclined surfaces 23a overlapped. In addition, as a joining structure other than this, there is a case where the end of each wire rope is inserted into the sleeve from a different direction and crimped, but the joining portion becomes large in diameter and it is easily fitted to a pulley or the like and is easily caught by a guide fitting. Not much applied from.

[0004]

By the way, in the above-mentioned example of the wire rope replacement work, the applied connection structure is not sufficient, and if it is cut during the work, it is directly connected to human life. Therefore, the present inventors have verified the conventional connection structure from the viewpoint of safety in particular.
In the case of the gripping method as shown in (a), the connection operation can be performed easily and quickly, but the binding force at both ends cannot be obtained stably and uniformly, and there is a possibility that the connection may come off from the grip due to a change in load applied to the connecting portion. In the welding method as shown in FIGS. 8B and 8C, fatigue or damage due to heat at the time of welding occurs, welding strength tends to vary among workers, and the quality is greatly influenced by the skill of the workers. As described above, it was confirmed that the above-mentioned rope exchange operation conditions had advantages and disadvantages in each case, and that all of them were not sufficiently satisfactory.

[0005] Based on the above background, the inventors of the present invention have found that it is difficult for a variation in joint strength or unevenness to occur between workers, a minimum joint strength is high, and when a joint portion passes through a pulley or the like. As a result of repeated investigations to obtain a connection structure that is easy to adapt to and has good workability, a connection structure of a wire rope that satisfies all such conditions was devised, and the present invention was completed.

[0006]

According to the present invention, as shown in FIG. 1, two wire ropes are formed by twisting a plurality of strands around a steel core. In the wire rope connection structure in which the ends of the wire ropes are inserted from the direction facing the cylindrical sleeve and the sleeve is crimped using a crimping device, the strands are removed from the ends of the wire ropes. Each of the overlapped portions of only the steel core is formed, and each overlapped portion is inserted into the sleeve and pressure-bonded in an overlapped state. In the connection structure described above, mechanical bonding is performed in a state where overlapping portions of only steel wires are overlapped with each other, and stable adhesion between the overlapping portions and the like are guaranteed.
For this reason, the minimum joining strength after crimping is increased, and it is difficult to be caught by guide metal fittings and pulleys, and it is a mechanical crimping type using a sleeve (the crimping force can always be kept constant). Effects such as less variation among workers structurally and less need for skill are obtained. In this structure,
When winding and unwinding operations are performed by a winding device through a pulley or the like, a tapered portion that is gradually reduced in diameter toward the overlapped portion is formed in a portion that reaches the overlapped portion of the steel core alone. Is preferred. This is because, when the tapered portion is interposed between the connecting portions, the step is small and smooth in outer diameter, so that it is less likely to be familiar with the pulley or the like and to be caught by the guide fitting. At the same time, the strand can be prevented from coming loose from the removed end face. This tapered portion can be easily formed, for example, by changing the length of the strand to be removed.

In the structure of claim 2 of the present invention, as shown in FIG. 2, two wire ropes are formed by twisting a plurality of strands around a hemp core or a steel core. In the wire rope connection structure, the end of the core wire rope and the end of the steel core wire rope are inserted from directions facing the cylindrical sleeve, and the sleeve is crimped using a crimping machine. A wire rope is formed with a overlapped portion of only the steel core from which the strand has been removed, and the overlapped portion and the end of the hemp core wire rope are inserted into a tubular sleeve and crimped in a stacked state. . In the above connection structure, the overlapped portion formed at the end of the steel core wire rope and the end of the hemp core wire rope are mechanically press-bonded in a state where they are overlapped, and can be easily implemented. It is possible to obtain power stably. As a conventional method for connecting the end of the hemp wire rope and the end of the steel wire rope, a steel core on the steel wire rope side is cut by a predetermined length and the corresponding end of the hemp wire rope is connected. After loosening the part, the exposed hemp core is inserted into the cut part and knitted again, that is, the so-called pecket method is adopted. This pecket system requires qualification and skill, is technically advanced, and has poor working efficiency. This structure has eliminated such problems.

Further, in the structure according to a third aspect of the present invention, as shown in FIG. 3, the steel core wire rope is formed by twisting a plurality of strands around a steel core. In the structure in which the end of the resin cremona rope is connected to the end, an overlapped portion of only the steel core from which the strand is removed is formed on the steel core wire rope, and the end of the overlapped portion and the cremona rope, Each of the steel core wire ropes protruding from the sleeve is locked by a special sleeve in a state in which a folded loop is formed, while being inserted into the cylindrical sleeve in a direction facing the cylindrical sleeve and protruding in different directions to be bundled. On the other hand, a protruding end portion of the cremona rope protruding from the sleeve is connected to a corresponding portion of the overlapping portion.
With the above connection structure, in the case of connecting a steel core wire rope and a Cremona rope, simply applying a crimping method makes it difficult to reliably maintain the joining strength due to the elasticity of the Cremona rope, etc. It is significant that the joint strength can be easily maintained by making effective use as much as possible. That is,
After inserting the portion of the steel core from which the strand has been removed and the end of the cremona rope from different directions into the cylindrical sleeve, the sleeve at the end on the steel core side is formed by forming a loop portion with a special sleeve. As a result, the tubular sleeve is prevented from coming off by hitting it, and the tubular sleeve is also hit by the knot on the Cremona rope side. As a result, it is possible to structurally prevent displacement in the pulling-out direction.

Further, the structure of claim 4 of the present invention is a structure in which the end of a resin cremona rope is connected to the end of a hemp core wire rope as illustrated in FIG. Each end of the cremona rope is inserted from the direction facing the cylindrical sleeve and bundled in a state of protruding in mutually different directions, and the projecting end portion of the hemp wire rope projecting from the sleeve is folded back to form a loop. While locked with a special sleeve in the formed state,
The protruding end portion of the cremona rope protruding from the cylindrical sleeve is connected to a corresponding portion of the hemp wire rope. With the above connection structure, in the case of connecting a hemp core wire rope and a Cremona rope, simply applying a crimping method makes it difficult to reliably maintain the bonding strength due to the elasticity of the Cremona rope etc. Significantly, the joint strength can be easily maintained by making the most of the elastic properties. In other words, after inserting the end of the hemp wire rope and the end of the cremona rope through the cylindrical sleeve from different directions, the looped loop portion is formed on the end of the hemp wire rope with a special sleeve, thereby forming a special sleeve. As a result, the sleeve is prevented from coming off by hitting the tubular sleeve, and the tubular sleeve is also hit by the knot on the cremona rope side. As a result, it is possible to structurally prevent displacement in the pulling-out direction.

[0010] The method for assembling a wire rope according to the present invention comprises a leader supported in an upright state, a cap provided on the top of the leader, and a sheave block partially incorporated in the cap. A winding device capable of hoisting and unwinding ropes, and a wire rope pulled out from the winding device and stretched over each pulley of the sheave block through the cap tree, In the case where the wire rope is incorporated into the sheave block side and arranged, or in the case where the wire rope is replaced with a new wire rope by continuously replacing (using an old wire as a messenger), the above-described wire rope connection This is done by applying the structure. This structure is an example in which the above-described wire rope connection structure of the present invention is effectively applied. The connection structure of the present invention described above,
This is because it is superior to any conventional method for each condition required for the rope replacement work as described in paragraph 0002.

Here, in this specification, a wire rope means a double rope in which a plurality of strands are twisted around a core wire (steel core or hemp core). However, the number of the strands and the number of wires constituting the strands are not limited. Further, as the wire rope, if the rope diameter becomes too small, the cutting load of the core wire constituting the rope becomes small, so that the rope diameter is 10 mm or more, more preferably 20 mm or more. The hemp wire rope uses hemp wire as the core wire of the wire rope, and the description of the wire rope applies to other requirements as it is. Cremona rope is made of resin such as nylon, and is usually a fuel wire having a diameter of 16 mm to 20 mm.

[0012]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. In this description, first,
After describing an example of a connection structure of the present invention, a method of assembling a wire rope into a device, which is a preferred application example thereof, will be described.

(Connection Structure 1) FIG. 1 shows an example of a connection structure between steel core wire ropes in the rope connection structure of the present invention. FIG. 1 (a) shows a main configuration of a connection portion of each wire rope.
(B) schematically shows the appearance of the connecting portion, (c) schematically shows an enlarged conceptual cross section taken along the line AA of (b), and (d) schematically shows an example of a curing process of the connecting portion. . A plurality of (usually six) steel core wire ropes are provided around the steel core 24 as the core.
Of the strands 25 of FIG.

In the connection structure shown in FIG. 1, first, at each end of a steel core wire rope 23, a superposed portion 24a exposing a steel core 24 is formed, and both superposed portions 24a, 24a are formed into four sleeves 26. On the other hand, from the state of being inserted and constrained from different directions, each sleeve 26 is mechanically crushed by using a crimping machine and crimped. Each sleeve 26
Is made of steel, and has a cylindrical shape large enough to allow the steel core wire ropes 23 to be easily inserted. Here, each steel core 24
Is exposed by unraveling and cutting the strand 25. In the cutting operation of the strand 25, as shown in (a), by changing the cutting length of each strand 25, processing is performed so that the portion reaching the overlapping portion 24a becomes the tapered portion B. The tapered portion B is formed by the overlapping portion 24
The shape gradually becomes smaller as approaching “a”, taking into account the influence of the steps. FIG. 1D shows an example of a curing process of the tapered portion B. In this connection structure,
Since the strand 25 is loosened when the tapered portion B is formed, the tapes 50 may be wound around the tapered portion B,
It is preferable to cure by a method such as winding a wire. In addition,
Although four sleeves 26 are used in the above embodiment, the number of sleeves 26 used is not limited to this, and may be, for example, three.

(Connection Structure 2) FIG. 2 shows an example of a connection structure between a steel core wire rope and a hemp core wire rope in the rope connection structure of the present invention. In addition, hemp core wire rope,
Although not shown, a plurality of (usually six) strands are twisted around the hemp core similarly to the above-mentioned steel core wire rope.

In the connection structure shown in the figure, first, at the end of the steel core wire rope 23, a superposed portion 24a exposing the steel core 24 as a core is formed, and then the superposed portion 24a and the hemp core wire rope 33 are formed. Are inserted into the four sleeves 26 from different directions and constrained, and each sleeve 26 is crimped by mechanical crushing using a crimping device. Here, the steel core 24 is exposed by unraveling and cutting the strand 25.
In the cutting operation of the strands 25, similarly to the example illustrated in FIG. 1A, by changing the cutting length of each strand 25, a portion reaching the overlapping portion 24a is processed into a tapered portion having a gradually decreasing diameter. It is preferable that the tapered portion be cured by a method such as winding a tape or a wire.

(Connection Structure 3) FIGS. 3 and 4 show the connection between the resin cremona rope and the steel core wire rope, and FIG. 4 shows the resin cremona rope and the hemp core of the rope connection structure of the present invention. The example of the connection structure with a wire rope is shown, respectively. In FIG. 4, (a) schematically shows the connection process between the hemp core wire rope and the cremona rope, (b) schematically shows the connection completed state, and (c) schematically shows the operation thereof. FIG. 3 shows a state corresponding to FIG. 4B. Each connection structure is different from FIG. 4 in the case of FIG. 3 in that the steel core 24 is exposed at the end of the steel core wire rope 23.
The only difference is that 4a is formed, and the rest is basically the same. Therefore, in the following description, the operation procedure will be described in detail with reference to the example of FIG.

In this connection structure, the hemp wire rope 33
(Or the steel core 24 of the steel core wire rope 23) and the cylindrical sleeve 29a through which the Cremona rope 43 can be inserted from different directions.
Then, the end of the cremona rope 43 is folded back to form a loop 28.
Is used. Then, first, as shown in FIG.
End 33a of (or steel core 24 of steel core wire rope 23)
And the end 43a of the Cremona rope 43 with the sleeve 29a.
To project in different directions. Thereafter, the hemp core wire rope 33 (or the steel core wire rope 23
On the steel core 24) side, a loop 28 is formed at the tip of the portion 33a (or the overlapping portion 24a of the steel core 24) protruding from the sleeve 29a. The loop 28 is formed by folding back the tip of the portion 33a (or the overlapped portion 24a of the steel core 24) and mechanically crushing it by a crimp-type sleeve 29b to be locked. Further, the tip 43a side of the cremona rope 43 protruding from the sleeve 29a is
(Or the steel core 24 of the steel core wire rope 23). Reference numeral 43b indicates the knot. In addition, such a tie part 43b can be easily formed by the property of the cremona rope 43 itself. Further, the press-fit type sleeve 29b may be exactly the same as the sleeve 29a.

In this connection structure, when the hemp core wire rope 33 (or the steel core 24 of the steel core wire rope 23) and the cremona rope 43 are pulled in the direction of the arrow as shown in FIG. Hits the sleeve 29a to prevent the movement in the pull-out direction, and further attempts to pull-out, the sleeve 29a hits the tying portion 43b, so that further displacement in the pull-out direction can be reliably prevented.

Next, an example when superiority of the above connection structure is examined by various tests will be described. In this test example, a tensile test was performed on a sample to which the crimping method shown in FIG. 1, the cable grip method shown in FIG. 8A, and the welding method using gas welding shown in FIG. 8B were applied. is there. The used wire (steel core wire rope) is an example having a diameter of 32 mm (B type slough 6 × Fi29). The target value of the strength is set at 2.5 tons or more.
Test equipment such as a tensile load meter and a dynamic strain meter was selected, and the tools used were all commercially available, including a sleeve (with a cutting strength of 8.8 tons in the catalog) and a cable grip (with a catalog value in the catalog). Cutting strength of 9.21 tons), bracket used for welding (catalog cutting strength of 70.7)
And a crimping machine (Hydraulic head separation tool No. 12A manufactured by Izumi Seisakusho) was selected.

In the tensile test, each sample was pulled under the same conditions, and the progress up to breaking and the load were measured with a load cell. FIG. 5 is a graph of the results of the tensile test in which the breaking load (ton) is plotted on the vertical axis. In the above three types of connection structures, the minimum values of the breaking load (the same as the strength) are 1.7 tons for the welding method, 2.06 tons for the cable grip method, and 7.86 tons for the crimp sleeve method. The crimping sleeve method was the largest, and it was confirmed that it was the most excellent in this regard. In other words, it is important to evaluate this type of strength at the minimum value, not at the average value.If the strength is evaluated at the average value, the strength that does not reach the average value implies the possibility of an accident. This is because such cases cannot be overlooked from the viewpoint of accident prevention. As for the strength variation (maximum load-minimum load), as shown as the strength range in FIG. 5, the welding method is 7.91 tons, the cable grip method is 4.25 tons, and the crimp sleeve method is 1.2.
8 tons. The crimp sleeve system of the present invention has very little variation compared to other systems, and it has been found that this is also excellent in this respect. It should be noted that this variance becomes very large in the case of the welding method, and it is considered that the cause is affected by the skill of the worker, the working conditions, and the like.

In addition to the above test, using a forged combination testing device in the construction device to be described later, incorporating a rope of each sample product and applying a load of 150 to 500 kg, the pulley having a sheave block having a joint portion is formed. The state when passing was observed. In this sheave passage test, the crimping sleeve method was good without being caught by the guide fitting for preventing the pulley from coming off the rope, but the cable grip method was sometimes partially caught and sometimes slipped out of the wire.

(Application Example of Connection Structure) FIGS. 6 and 7 show an example of an apparatus to which the above-described wire rope connection structure is applied. FIG. 6 shows a case where various piles and the like are formed on the ground. FIG. 7 schematically shows a construction apparatus used, and FIG. 7 schematically shows a wire rope installation path used in the construction apparatus. The construction apparatus shown in FIG. 6 includes a leader 2 supported upright by a back stay 3 on the side of the base machine 1, a cap 4 provided on the top of the leader 2, and a cap 4
, A shock absorber 6 suspended from the sheave block 5, and a driver body 7 such as a prime mover, an exciter, and a chuck disposed below the shock absorber 6.
And a winding device 8 provided on the base machine 1 side, and a wire rope 23 pulled out from the winding device 8 and stretched over each pulley of the sheave block 5 through the coping 4. The sheave block 5 is composed of a plurality of pulleys 9a incorporated in the coping 4 and pulleys 9b arranged in pairs as shown in FIG. And wire rope 2
7A, in the case of FIG. 7A, the wire rope 23 is pulled out from the rotating drum of the winding device 8 and guided to the pulley 9c provided on the introduction side of the cap 4 so that the sheave block 5 is moved. And a plurality of pulleys 9a and 9b are stretched over the pulleys 9a and 9b, and the drawn ends of the pulleys 9a and 9b are locked to the side of the coping 4. In the case of FIG. 7 (b), the pull-out end described above is returned to the winding device 8 around the pulley 9c without being locked to the coping 4 and locked to the rotating drum.

In such a construction apparatus, the wire rope 2
The winding device 3 is wound up and rewinded by the winding device 8, and the casing K connected to the driver body 7 and its chuck is moved up and down along a guide rail provided in the vertical direction of the reader 2 under the control. The wire rope 23
A rope with a steel core and multiple strands around the steel core is commonly used.It is initially installed as a setting operation at the time of installation of the equipment, and it wears out when it is used continuously. Will be replaced with a new one if necessary. In this replacement work, generally, the end of the wire rope 23 and the end of the new wire rope 23 are connected, and the old rope is wound up or rewinded to be replaced with a new rope. However, during the initial installation and replacement work of the wire rope 23, the work cannot be performed on the ground side, and the work may be performed at a high place by climbing the leader 2 (for example, in the case of offshore construction, the height may be 70 mm or more on board. )become. Also, in this altitude work,
It is often impossible for a person to climb with the leading end of the wire rope 23 because of a large weight proportional to the wire length. In this case, for example, the following procedure is performed. That is, in the first stage, the Cremona rope 43 lighter than the wire rope 23 is incorporated as shown in FIG. In the second stage, the hemp core wire rope 33, which is heavier and stronger than the cremona rope, is connected to the end of the cremona rope 43, and the hemp core wire rope 33 is continuously wound by winding or unwinding the entire length of the cremona rope 43. Incorporated in the replacement system. Then, in the final third stage, the hemp core wire rope 33 and the steel core wire rope 23 are assembled in a continuous replacement system.

The connection between the wire ropes, the connection between the steel core wire rope 23 and the hemp core wire rope 33, the connection work between the hemp core wire rope 33 and the cremona rope 43, which are performed in the above-mentioned initial installation or replacement of old and new. Then, the connection structure (sleeve method) in the form shown in FIGS.
By applying the method described above, it is possible to surely eliminate the risk of accidentally disconnecting the connection portion and causing an accident, and also eliminate the need for human skill and less influence from human restrictions. Therefore, the safety of a person involved in this type of construction apparatus can be further ensured, and the working environment can be further improved.

[0026]

As described above, in any case, the connection structure of the wire rope according to the present invention has a high minimum joining strength, does not easily fit into a pulley or the like, and is hardly caught by a guide fitting for preventing the wire from coming off. In addition, effects such as the fact that variations between workers are reduced structurally and skill is not required are obtained. Therefore, for example, with respect to a construction device having a wire rope as an element, the connection structure of the present invention is applied to perform an initial assembling operation of the wire rope into the device, or perform a work of replacing the wire rope with a new one. In addition to being able to improve safety, it does not require much skill and can be performed by anyone.

[Brief description of the drawings]

FIG. 1 is a view showing a connection structure between steel core wire ropes according to the present invention.

FIG. 2 is a view showing a connection structure between a steel core wire rope and a hemp core wire rope according to the present invention.

FIG. 3 is a diagram showing a connection structure between a steel core wire rope and a cremona rope according to the present invention.

FIG. 4 is a view showing a connection structure between a hemp core wire rope and a cremona rope according to the present invention.

FIG. 5 is a diagram showing the results of a tensile test when the joint structure of the present invention is applied.

FIG. 6 is a schematic view showing an entire construction apparatus example to which the connection structure is applied.

FIG. 7 is a schematic view showing a route of incorporating a wire rope into the construction apparatus.

FIG. 8 is a diagram showing an example of a wire rope connection structure conventionally applied.

[Explanation of symbols]

 Reference Signs List 23 wire rope 24 steel core 25 strand 24a overlapping portion 26, 29a sleeve 28 loop 29b crimping sleeve for loop locking 33 hemp core wire rope 43 cremona rope 43b knot

Claims (6)

[Claims] The two wire ropes are formed by twisting a plurality of strands around a steel core, and the ends of the wire ropes are inserted into the respective sleeves from a direction facing the cylindrical sleeve, thereby forming the sleeve. In the connection structure of a wire rope that crimps using a crimping device, at each end of the wire ropes, an overlap portion of only the steel core from which the strand has been removed is formed, and each overlap portion is inserted into the sleeve and overlapped. A connection structure for a wire rope for construction civil equipment, wherein the connection is performed in a crimped state. 2. A wire rope in which a plurality of strands are twisted around a hemp core or a steel core. An end of the hemp core wire rope and an end of the steel core wire rope are formed by: In the connection structure of a wire rope that is inserted from the direction facing the cylindrical sleeve and crimps the sleeve using a crimping device, a superposed portion of only the steel core from which the strand is removed is formed on the steel core wire rope, A connection structure for a wire rope for a construction and civil engineering device, wherein the overlapped portion and the end of the hemp core wire rope are inserted into a tubular sleeve and crimped in an overlapping state. 3. A structure in which a steel core wire rope is formed by twisting a plurality of strands around a steel core, and wherein an end of a resin cremona rope is connected to an end of the steel core wire rope. A state in which a superposed portion of only the steel core from which the strand has been removed is formed on the core wire rope, and the ends of the superposed portion and the cremona rope are inserted from the direction facing the tubular sleeve and project in different directions from each other. While the protruding end portion of the steel core wire rope protruding from the sleeve is locked with a dedicated sleeve in a state where a folded loop is formed, the protruding end portion of the cremona rope protruding from the sleeve is connected to the overlapping portion. A connection structure for a wire rope for a construction and civil engineering device, wherein the connection structure is connected to a corresponding portion of the wire rope. 4. A structure in which an end of a resin cremona rope is connected to an end of a hemp wire rope, wherein each end of the hemp wire rope and the cremona rope is connected from a direction facing a cylindrical sleeve. Each is inserted and bundled in a state protruding in different directions, and the protruding end portion of the hemp wire rope protruding from the sleeve is locked with a dedicated sleeve in a state where a folded loop is formed, while the protruding end portion is protruded from the sleeve. A connection structure for a wire rope for construction and civil engineering equipment, wherein a protruding end portion of a cremona rope is connected to a corresponding portion of the hemp core wire rope portion. 5. A leader supported in an upright state, a cap provided on the top of the leader, a sheave block partially incorporated in the cap, and a winding device capable of winding and unwinding ropes. And a wire rope which is pulled out from the winding device and is stretched over each pulley of the sheave block through the coping, wherein the wire rope is installed and arranged on the sheave block side at an initial stage. A method for assembling a wire rope into a device, the method being performed by applying the wire rope connection structure according to any one of Items 4, 3, and 2. 6. A leader supported in an upright state, a cap provided on the top of the leader, a sheave block partially incorporated in the cap, and a winding device capable of winding and unwinding ropes. And, provided with a wire rope that is pulled out from the winding device and stretched over each pulley of the sheave block through the coping, when replacing the wire rope with a new wire rope by a continuous replacement method, A method for assembling a wire rope into a device, the method being performed by applying the wire rope connection structure according to claim 1.