JPH0942384A - Annular locking part of wire rope and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten the region of strand extreme end projecting parts, surely lock by a slipout preventing member of short length, and prevent large force from applying to an annular part. SOLUTION: This annular locking part of wire rope is constituted of an annular part 2 formed by annularly folding back six strands 21 extended from a wire rope main body 10 at the end part of the wire rope main body 10, strand extreme end projecting parts 23, 24 formed by twisting respective strand extreme end parts released from twist after forming the annular part 2 together with the respective strands 21 of the wire rope main body 10, and a slipout preventing member 4. Further the strand extreme end projecting parts 23, 24 are formed by twisting two strands of the strand extreme end parts after forming the annular part 2 together with the strands 21 of the wire rope main body 10 by five times and then twisting it more one time, and twisting the other four strands by four times and then twisting one more time. Meanwhile, the slipout preventing member 4 is pressed and fixed to the outer circumference of the wire rope main body 10 so as to cover the strand extreme end projecting parts 23, 24.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an annular locking portion formed at an end portion of a wire rope formed by twisting a plurality of strands and an improvement in a manufacturing method thereof.

[0002]

2. Description of the Related Art A wire rope in which an annular engaging portion is provided at an end of a wire rope and an object can be lifted by hooking the annular engaging portion on the annular engaging portion has been widely known. Conventionally, various methods such as a so-called Flemish processing method have been adopted as a method of processing the annular locking portion. The Flemish processing method divides the tip of the wire rope body, which is formed by twisting multiple strands consisting of multiple strands, into two parts as shown in Fig. 2 (A) (B). An annular portion is formed by twisting the two so as to intersect each other from the opposite direction while forming an annular shape. Next, after untwisting each strand tip portion after forming the annular portion, each strand tip portion is sequentially passed through the twisting gap of the wire rope body to form each twisted strand forming the wire rope body. Knit multiple times. Then, as shown in FIG. 7, six strands of the tip ends a1 ... A6 of each strand tip portion are projected from the twist gaps b1 ... b1 of the wire rope body b to the outer peripheral portion to form the strand tip protruding portion a. This is what you do. Further, a cylindrical retaining member c is often attached to the strand tip protrusion a, and after the retaining member c is passed through the wire rope body b so as to cover the strand tip protrusion a, the outer periphery The distal end a1 of the tip of the strand protruding from the twisting gap b1 of the wire rope body b by being pressed and deformed from the side to be fixed ...
It is made so that a6 cannot be removed. However, when the untwisted strand tips after forming the annular portion and the strands of the wire rope body are twisted normally, the leading edge a of each strand tip as shown in FIG.
1 ... a6 are projected on the outer peripheral portion of the wire rope main body b so as to be arranged substantially in the axial direction. As a result, the area of the strand tip protruding portion a becomes long, and a long retaining member c is required. When the retaining member c becomes long, not only the material cost becomes high, but also the fixing work to the wire rope body b requires labor. Further, if the retaining member c becomes long, it cannot be bent between them, so that the operation for suspending the suspended member becomes difficult. Furthermore, when the tip end protrudes to one side of the outer peripheral portion of the wire rope body b, the protruding portion swells more than the other portion, so that the axis at the strand tip protruding portion a is the axis of the wire rope body b. And as a result, the tensile load is applied to the strand tip protruding portion a at a position deviated from the axis of the wire rope body b, acts as an eccentric load, and the strand tip portion passing through the twisting gap is likely to come off. There is. On the other hand, when the retaining member c is pressed and deformed to lock the leading ends a1 to a6 of the tip end of each strand, even if force is applied to the entire outer periphery of the retaining member c, the wire rope body b
There is a problem in that it is difficult to uniformly press the entire outer circumference of the above and it is difficult to evenly press the leading end of each strand tip.

On the other hand, in the Flemish processing method described above, since the two halves are crossed from opposite directions to form an annular shape as described above, the entire tip of the wire rope body is folded back into an annular shape without halving. The tensile strength of the annular portion is stronger than other processing methods such as the so-called half-insertion processing method. However, there is no standard for the tensile strength of the annular part, but it is simply stated in Article 219 of the "Safety Rules for Cranes, etc." established by the Labor Standards Bureau of the Ministry of Labor that "After weaving all strands of wire rope three or more times,
The strands of each strand shall be woven more than twice (or once if all strands are woven four times or more) ". Therefore, even in the Flemish processing method described above, in order to satisfy the provisions of the "Safety Regulations for Cranes etc.", the untwisted strand tips after forming the above annular portion are sequentially twisted in the wire rope body. After re-twisting (braiding) each strand forming the wire rope body three times so as to pass through the forming gap, untwist the multiple strands of each strand and cut half. , Each remaining strand is further passed through the twisting gap of the wire rope body, and twice on each strand forming the wire rope body,
After twisting or twisting each of the strand tips four times, it is necessary to cut half of the wires and twist each of the remaining wires only once more. However, for example, after twisting each of the strand tip portions three times, cutting half of the strands, and twisting the remaining strands each further twice, each is formed by braiding and cutting three times as described above. In addition to the strand tips a1 ... a6 projecting at six locations, the tips a7 ... a of each of the remaining strands above the strands as shown by the chain line in FIG.
12 projects at six places. As a result, the region of the protruding portion of the strand tip is further lengthened, and a longer retaining member is required. The same applies when the half of the wire is twisted once more after twisting four times.

[0004]

DISCLOSURE OF THE INVENTION The present invention has been proposed in view of the above circumstances, and it is possible to shorten the region of the protruding portion of the strand tip, and to easily and surely lock it with a short retaining member. A first object of the present invention is to provide an annular locking portion in a wire rope that can apply a large force to the annular portion and a method for manufacturing the same. INDUSTRIAL APPLICABILITY The present invention is a Flemish processing method, which is obtained by a forming method that conforms to the "safety rules for cranes, etc." A second object is to provide an annular locking portion in a wire rope that can be locked and can apply a large force to the annular portion, and a method for manufacturing the same.

[0005]

The present invention solves the above problems by providing an annular locking portion in a wire rope having the following features. The annular locking portion of the wire rope according to the first invention of the present application is provided with the annular locking portion 1 at the tip of the wire rope body 10 configured by twisting a plurality of strands 21. The annular locking portion 1 includes an annular portion 2 formed by folding a plurality of strands 21 extending from the wire rope body 10 in an annular shape, a strand tip portion 22 after the annular portion 2 is formed, and a wire rope. Strand 2 of body 10
The wire rope body 10 is provided with a locking portion 2 formed by twisting each of them and a retaining member 4 for preventing the locked strand tip portion 22 from coming off from the wire rope body 10. The locking portion 3 connects the strand end portions 22 to the twist gap 11 of the wire rope body 10.
From the outer circumference of the wire rope main body 10 are provided with strand tip projecting portions 23 and 24 projecting radially outward. The strand tip projections 23, 24 adjust the length of the strand 21 required for one twist of the strand tip 22 relative to the strand 21 and the number of twists to adjust the strand tip 22 to the wire rope body 10 respectively. At least two rows in the circumferential direction and a plurality of rows in the axial direction are arranged side by side on the outer circumference of the. Here, at least two rows in the direction along the circumferential direction means that at least two strand tip projecting portions 23, 24 protruding from the twisting gap 11 of the wire rope body 10 to the outer peripheral portion of the wire rope body 10 are the wire rope body. In addition to the case where the whole of 10 overlaps in the circumferential direction, the case of partially overlapping is also included.

A second aspect of the present invention is an axial direction in which the strand tip projecting portions 23, 24 according to the first aspect of the present invention make the strand tip portions 22 at substantially equal intervals in the circumferential direction at least on the outer circumference of the wire rope body 10. It is made up of four ridges lined up along the line. Here, the four locations along the axial direction that are substantially equidistant in the circumferential direction mean that the strand tip protruding portions 23 and 24 that have come out from the twist gap 11 of the wire rope body 10 to the outer peripheral portion of the wire rope body 10 are wires. In addition to the case where the whole is overlapped in the axial direction at the position of the outer circumference of the rope body 10 which is divided into approximately four in the circumferential direction, the case where the rope main body 10 is partially overlapped in the axial direction is included.

The third invention of the present application is such that the annular locking portion 1 according to the first or second invention of the present application comprises a tubular retaining member 4. The retaining member 4 is fixed to the outer peripheral portion of the wire rope main body 10 so as to cover the strand front end protruding portions 23 and 24, so that the strand front end protrusion protruding from the outer peripheral portion of the wire rope main body 10 is provided. The strand tips 22 of the portions 23 and 24 are designed so as not to come off from the twisting gap 11.

The fourth invention of the present application is a plurality of strands 21.
Wire rope body 1 constructed by twisting
An annular locking portion 1 is provided at the front end portion of 0. The annular locking portion 1 includes an annular portion 2 formed by folding a plurality of strands 21 extending from the wire rope body 10 in an annular shape, a strand tip portion 22 after the annular portion 2 is formed, and a wire rope. The wire rope main body 10 is provided with a locking portion 3 formed by twisting each strand 21 of the main body 10. The locking portion 3 includes a plurality of strand tip end portions 22 and a plurality of strand tip end protrusions 23 and 24, which are protruded from the twist gap 11 of the wire rope body 10 in a radially outward direction of an outer peripheral portion of the wire rope body 10. Prepare
Further, the protruding portions 23 and 24 at the tip of the strand are
Of the strand tip portion 22 after forming, the strand 21 of the wire rope body 10 is twisted five times and then twisted one or more times, and the strand 21 of the wire rope body 10 is twisted four times. It is formed by twisting and then twisting one or more times.

Further, the present invention solves the above problems by providing a method for manufacturing an annular locking portion in a wire rope having the following features. The manufacturing method of the present invention is
The annular portion 2 is formed by folding back the plurality of strands 21 extended from the wire rope body 10 in an annular shape at the tip of the wire rope body 10 formed by twisting the plurality of strands 21. After that, the length of the strand 21 and the length of the strand 21 required for twisting the strand distal end 22 after forming the annular portion 2 and each of the strands 21 of the wire rope main body 10 per twist with respect to the strand 21 The engaging portion 3 is formed on the wire rope body (10) by twisting while adjusting the number of times. Next, the twisted strand tip 22 is projected from the twist gap 11 of the wire rope body 10 to a predetermined position on the outer circumference of the wire rope body 10 in a radially outwardly protruding manner.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a partially enlarged side view of a part of an embodiment of an annular locking portion in a wire rope of the present invention, and FIGS. 2 to 5 are explanatory views of a process of processing the annular locking portion. Is.

The annular locking portion 1 in the wire rope of the present invention is formed at the tip of the wire rope body 10 formed by twisting a plurality of strands 21 ... Then, the annular locking portion 1 is provided with the annular portion 2
And a locking portion 3 formed on the wire rope body 10,
The retaining member 4 fixed to the locking portion 3 is provided.

The wire rope body 1 in this embodiment
0 is formed by twisting six strands 21 ... 21, and each strand 21 is made of steel wire.
It is composed of one wire formed by twisting four wires.

The annular portion 2 is formed by folding a plurality of strands 21 ... 21 extended from the wire rope body 10 into an annular shape. Specifically, as shown in FIGS. 2 (A) and 2 (B), it is formed by the Flemish processing method. First, the strand 2 at the tip of the wire rope 10 is formed.
21 are divided into two by untwisting over a predetermined length range, the two are folded back so as to form a curved shape in the opposite direction, and they are retwisted to a branched portion. Note that FIGS. 2A and 2B are schematic diagrams, and the left side divided by untwisting is three strands 21
a, 21b, 21c, and three strands 21d, 21e, 21f on the right side.

The locking portion 3 is a portion where the strand tip portions 22 ... 22 after forming the annular portion 2 are locked to the wire rope body 10, and the strand tip portions 22 ...
The wire rope main body 10 is provided with strand tip projecting portions 23 and 24 which are projected on the outer peripheral portion of the wire rope body 10.
The locking portion 3 includes the strand end portions 22 after forming the annular portion 2 and the strand 2 of the wire rope body 10.
And 1 are formed while adjusting the length of the strand 21 and the number of twists required for one twist of the strand tip portion 22 with respect to the strand 21. For details, first, as shown in FIG.
21f of the bisected strands 21a ... 21f after the formation of the strands are arranged on the left and right sides of the wire rope body 10 on the front side and the rear side, respectively.
In addition, untwist each of them and divide into one,
From the strand tip 22a to the sixth strand tip 22
Divide into 6 of f.

Next, the first strand tip portion 22 on the lower left side
As shown in FIG. 4, the wire a is inserted into the twisting gap 11 of the wire rope body 10, and one strand 21 in the wire rope body 10 is inserted as shown in FIG. 5 (A).
It is twisted by winding it around a for five times, and as shown in FIG. 6, it is taken out from the twisting gap 11 to the right side position in the drawing on the outer periphery of the wire rope body 10. It should be noted that this strand end portion 22a is used as the strand 2 of the wire rope body 10.
When wound around 1 to 2 times to 3 times, the strand tip portions 22a ... 22f go around the outer circumference of the wire rope body 10, and the length of the strand 21 required for one twist of the strand tip portion 22 with respect to the strand 21 is increased. By adjusting it, you can move it to the right position.

Hereinafter, as shown in FIGS. 4 and 5, the second strand tip portion 22b at the left center is replaced with the first strand tip portion 2
The strand 2a is wound around the upper strand 21b of the wound strand 21a four times, and left on the left side of the first strand tip portion 22a and the left side position in the figure on the outer periphery of the wire rope body 10. In addition, the third strand tip 22c on the upper left side is connected to the second strand tip 22b.
Strand 2 on the upper side of the strand 21b wound with
It is wound around 1c four times, and is taken out from the twisting gap 11 formed immediately above the twisting gap 11 from which the second strand tip 22b is taken out, and is taken out to a position above the second strand tip 22b. After that, the entire body is turned upside down (in the following description, the case where it is performed from the back side is shown), and similarly, as shown in FIG. 5 (B) and FIG. It is wound around the strand 21 of No. 10 five times, and is put out above the first strand tip portion 22a that was put out first and at the left side position of the third strand tip portion 22c that was put out earlier. In addition, the fifth strand tip portion 22e in the right center is wound around the strand 21 of the wire rope body 10 four times,
The first strand tip portion 22a and the second strand tip portion 22b, which have been previously mentioned, are brought out to the front position shown in the figure.
Further, the sixth strand tip portion 22f on the upper right side is wound around the strand 21 of the wire rope body 10 four times, and the fifth strand tip portion between the first strand tip portion 22a and the second strand tip portion 22b which has been previously put out. Part 22
e from the rear position (in the figure, for convenience of description, it is shown above the fifth strand tip portion 22e by a dotted line).

In the above embodiment, the first strand tip portion 22a is wound five times and the second strand tip portion 2 is wound.
2b and the third strand tip portion 22c are wound four times, when the first strand tip portion 22a is set to four times, when the second strand tip portion 22b is wound four times,
Even if the winding is adjusted, the projecting position of the second strand tip portion 22b to the outer periphery of the wire rope body 10 does not come to the side of the projecting position of the first strand tip portion 22a, but rather projects upward. Is. Further, the fourth strand tip portion 22d is wound five times. In four windings, the protruding position of the wire rope body 10 to the outer circumference is the same as that of the first strand tip portion 22a even if the winding is adjusted. This is because it does not come between the tip end portion 22b of the second strand and projects downward. In addition, for convenience of explanation, in FIGS.
The strand 21 of the wire rope body 10 and the annular portion 2
Although the strand 21a and the first strand tip portion 22a after forming the wire are shown as one continuous piece, the wire rope body 1 for twisting the first strand tip portion 22a
The 0 strands 21 are not necessarily the same.

Next, as shown in FIGS. 5 (A), (B) and FIG. 6, twelve strands of the strand tip portions 22a ... Two tip parts 22ax, 22dx, 22ay, 22d of each
After dividing into y, the tip portions 22a of the 12 strands on one side
By cutting y and 22dy at positions near the outer circumference of the wire rope main body 10, short strand tip projections 23a ... 23f are provided at six positions on the outer circumference of the wire rope main body 10.
To form

Then, each of the strand end portions 22ax ... 22fx consisting of the 12 strands of the other half of the other side is threaded again in the wire rope body 10 so as to be inserted again into the twisting gap of the wire rope body 10. The strands 21 are twisted in such a manner that they are wound once around one strand 21 (see FIGS. 5 (A) and 5 (B)), and as shown in FIG. It is put out above the portion 23c. Similarly, the second strand tip 22bx is replaced by the fourth strand tip projection 23d.
The fourth strand tip portion 22dx was passed again above the second strand tip portion 22bx which was passed through the third strand tip portion 22c, to the right side position of the first strand tip portion 22a which was passed again. The sixth strand tip portion 22 is provided above the first strand tip portion 22ax.
In the front position of the wire rope main body 10 between the second strand tip portion 22bx that has been re-passed and the first strand tip portion 22ax that has been re-passed, f is the second strand tip that has been re-passed through the fifth strand tip portion 22e. Part 22b
At the rear position of the sixth strand tip portion 22fx between the x and the first strand tip portion 22ax that has passed through again (again, in this case, for convenience of description, the sixth strand tip portion 22f is indicated by a dotted line above the sixth strand tip portion 22f). , Give each one. Then, by cutting these at positions near the outer circumference of the wire rope body 10, long strand tip projections 24a ... 24f are formed at six locations on the outer circumference of the wire rope body 10 above the short strand tip projections 23a ... 23f. To do.

As described above, by using the Flemish processing method, "After woven all the strands of the wire rope three or more times in Article 219 of the regulation" Safety rules for cranes etc. "established by the Labor Standards Bureau of the Ministry of Labor, An annular locking portion of the wire rope conforming to the rule that "the wire shall be braided more than once (or more if all the strands are braided four times or more)" is obtained.

The short-strand tip protruding portions 23a ... 23f thus formed are juxtaposed in the axial direction in each twisting gap 11 separated by one strand interval.
Further, in the circumferential direction, the short strand tip projecting portion 23a of the first strand tip portion 22a and the fifth strand tip portion 22e
Short strand tip protrusion 23e, second strand tip 22b short strand tip protrusion 23b, and sixth strand tip 22f short strand tip protrusion 23f.
Are arranged side by side, and the short strand tip protrusion 23d of the fourth strand tip portion 22d and the short strand tip protrusion 23d of the third strand tip portion 22c are arranged on the upper side thereof in a substantially circumferential direction. . Further, the long strand tip projecting portions 24a ... 24f formed on the upper side of the short strand tip projecting portions 23a ... 23f are arranged in the same arrangement as the short strand tip projecting portions 23a. As a result, the strand tip protrusions 23, 24 as a whole are arranged in four rows in the axial direction of the wire rope body 10, and the length regions of the strand tip protrusions 23, 24 can be shortened. Moreover, since the first row and the third row from the lower side have substantially symmetrical shapes in the front-rear and left-right directions at four locations in the circumferential direction, when the suspended member is suspended on the annular portion 2, the strand tip protrusion A tensile load is also applied to the portions 23 and 24 substantially along the axial center of the wire rope body 10. At that time, for example, when the tip end of the strand is projected to an arbitrary position on the outer circumference of the wire rope body 10, the protruding portion swells more than other portions, so that the axial center of the strand tip protruding portions 23 and 24 is the wire rope body. As a result, the tensile load is applied to the strand tip projecting portions 23, 24 at a position deviated from the axis of the wire rope body 10 to act as an eccentric load, and the strand tip passed through the twisting gap. The parts may come off easily. However, in the present embodiment, the tensile load is also applied to the strand tip projecting portions 23 and 24 along substantially the axial center of the wire rope body 10, so that the strand tip portion that has passed through the twist gap can be reliably prevented from coming off. .

The retaining member 3 is the wire rope body 1
Strand tip protrusions 23, 24 protruding from the outer periphery of 0
Is to prevent the strand from coming off from the twisting gap, and protects the hands and the like from the protruding strand tip protrusions 23 and 24. This retaining member 3
As shown in FIGS. 1 and 6, is made of a tubular body made of a relatively soft metal such as aluminum. The strand tip projecting portions 23, 24 of the wire rope body 10 are
Is disposed so as to cover the strand tip projecting portions 23 and 24, and is then attached by being pressed from the outer peripheral side and pressure-bonded.

With the above construction, the length regions of the strand tip projecting portions 23 and 24 are shortened, so that the retaining member 3 having a short length can be used.
This makes it possible to reduce the manufacturing cost of the retaining member 3 in terms of material. Further, by using the retaining member 3 having a short length, the work of crimping the retaining member 3 can be facilitated. In addition, during crimping, as shown in FIG. 6, since they are juxtaposed substantially symmetrically in four positions in the circumferential direction in the left-right front-rear direction, if the entire outer periphery of the retaining member 3 is uniformly pressed, each strand tip protruding portion It can be pressed evenly, can be easily and surely locked, and can have a strong tensile strength. Table 1 below shows the results of the tensile test with the retaining member 3 attached. In addition, this tensile test was performed by twisting six strands of 24 strands to obtain a diameter of 1
Strand tip protrusion 2 using the one formed to 2 mm
The upper part of 3, 24 and the annular part 2 were fixed.

[0024]

[Table 1]

As a result, both the material 1 and the material 2 are cut by the load of the wire rope body 10 itself, and the cutting is performed at the upper position of the strand tip projecting portions 23 and 24, and the strand tip projecting portion 23 is cut. , 24 was not cut. You.

In this embodiment, the short strand tip projections 23a ... 23f and the long strand tip projections 24a.
24f are arranged substantially symmetrically in four directions in the circumferential direction in the left-right and front-rear directions to have a high tensile strength, but the invention is not limited to this form, and for example, in FIG. The protrusions 23e and 24e of the fourth strand tip 22d on the rear side of the wire rope body 10 between the protrusions 23d and 24d of the fourth strand tip 22d and the protrusions 23c and 24c of the third strand tip 22c. Also, in this case as well, the strand tip projection 2
Since the length regions of 3 and 24 can be shortened and the wire rope main body 10 is positioned in the front-rear and left-right positions, it is possible to provide tensile strength in the same manner as when the wire rope body 10 is arranged in four positions in the circumferential direction, and a retaining member. If the entire outer circumference of the retaining member 3 is pressed evenly during the pressure-bonding of 3, the protruding portions of the strand tips can be pressed evenly.

Further, the short strand tip projecting portions 23a ... 23
24f are not limited to those arranged side by side at the front, rear, left, and right positions of the wire rope body 10, and for example, the protrusions 23e, 24e of the fifth strand tip 22e and the sixth strand tip 22f, 23f,
24f is the protrusion 23 of the first strand tip 22a.
a, 24a and the protruding portion 23 of the second strand tip portion 22b
It may be arranged at an appropriate position between b and 24b. Further, it may be arranged in two rows in a direction along the circumferential direction.
The length regions 3, 24 can be shortened.

On the other hand, in the present embodiment, the Flemish processing method is used as the method of forming the annular portion 2, but the present invention is not limited to this, and can be applied to the conventional method such as the half-insertion processing method. , Can be changed as appropriate. In addition, in the present embodiment, all the strands are twisted four times or more and then once more so as to comply with the regulations of the “safety rules for cranes etc.”, but they are used without conforming to this standard. In this case, for example, the present invention may be adopted when the strand is cut and used only by twisting the strand three times or more, and in that case, only the short strand tip protruding portions 23a ... 23f in FIG. 6 are used. .

[0029]

As described above, according to the present invention, since the strand tips are arranged in parallel in two or more rows in the circumferential direction of the wire rope body, the length region of the strand tip projection can be shortened and the length of the retaining member can be shortened. The short one can be used. Further, by using a retaining member having a short length, the retaining member can be easily crimped. Moreover, when crimping, by arranging the strand tips at the four locations in the circumferential direction of the wire rope body in the left-right and front-rear direction, if the entire outer periphery of the retaining member is pressed evenly, the strand tip protrusions will be even. It can be pressed against and can be locked easily and securely.
Moreover, when the suspended member is hung on the annular portion, the tensile load can be applied even at the strand tip protruding portion along the approximate axis of the wire rope main body, and the strand tip portion that has passed through the twist gap can be pulled out. Can be reliably prevented and the tensile strength can be increased.

[Brief description of drawings]

FIG. 1 is a partially enlarged side view of a cross section of a part of an embodiment of the present invention.

[FIG. 2] (A) is an explanatory view of a state in which the strand at the tip of the wire rope main body is divided into two parts in the process of forming the annular part, and (B) is an explanatory diagram when forming an annulus with the divided two strands. is there.

FIG. 3 is an explanatory diagram of a state where an annular portion is formed.

FIG. 4 is an explanatory diagram when passing the tip end portion of the strand after forming the annular portion through the twisting gap of the strand of the wire rope body.

FIG. 5 (A) is an explanatory view of twisting one of the strand tip portions arranged on the left side of the wire rope body after forming the annular portion into a strand of the wire rope body,
(B) is an explanatory view when twisting the other end of the strand tip portion arranged on the right side of the wire rope body after forming the annular portion into a strand of the wire rope body.

FIG. 6 is an explanatory view when a strand tip portion twisted on a strand of a wire rope body is brought out from a twisting gap to an outer periphery.

7 is an end view taken along line IV-IV in FIG.

FIG. 8 is a partially enlarged side view in which a part of the conventional example is shown in section.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 annular locking part 2 annular part 3 locking part 4 retaining member 10 wire rope body 21 strand 22 strand tip 23a ... 23f short strand tip projection 24a ... 24f long strand tip projection

Claims (5)

[Claims] Claims: 1. A wire rope main body (10) formed by twisting a plurality of strands (21) is provided with an annular engaging portion (1), and the annular engaging portion (1) is provided. An annular portion (2) formed by folding a plurality of strands (21) extended from the wire rope body (10) into an annular shape, and a strand tip portion (22) after the annular portion (2) is formed. And a lock portion (3) formed on the wire rope body (10) by twisting each of the strands (21) of the wire rope body (10), and the lock portion (3) includes a plurality of strands. Move the tip (22) from the twist gap (11) of the wire rope body (10) to the wire rope body.
The strand tip protrusions (23) and (24) are provided so as to project radially outward of the outer peripheral portion of (10), and the strand tip protrusions (23) and (24) are the strands (21).
The strand tip (22) by adjusting the length of the strand (21) and the number of twists required for each twisting of the strand tip (22) for each, the outer periphery of the wire rope body (10), An annular locking portion in a wire rope, comprising at least two rows extending in a circumferential direction and a plurality of rows extending in an axial direction so as to project in a line. 2. The strand tip projections (23), (24) are arranged so that the strand tip (22) is at least the wire rope body.
The annular locking portion of the wire rope according to claim 1, characterized in that the annular locking portion is formed so as to be arranged so as to be lined up at four locations along the axial direction at substantially equal intervals in the circumferential direction on the outer circumference of (10). 3. The retaining member (4), wherein the annular engaging portion (1) has a tubular retaining member (4).
Is fixed to the outer peripheral portion of the wire rope main body (10) so as to cover the strand front end protruding portions (23) and (24), so that the strand end protrusion protruding on the outer peripheral portion of the wire rope main body (10) is projected. Strand tip (2) in section (23) (24)
The annular locking portion of the wire rope according to claim 1 or 2, characterized in that 2) is designed so as not to come off from the twisting gap (11). 4. A wire rope main body (10), which is formed by twisting a plurality of strands (21), is provided with an annular locking portion (1) at the distal end thereof, and the annular locking portion (1) is An annular portion (2) formed by folding a plurality of strands (21) extended from the wire rope body (10) into an annular shape, and a strand tip portion (22) after the annular portion (2) is formed. And a lock portion (3) formed on the wire rope body (10) by twisting each of the strands (21) of the wire rope body (10), and the lock portion (3) includes a plurality of strands. Move the tip (22) from the twist gap (11) of the wire rope body (10) to the wire rope body.
The strand tip protruding portions (23) and (24) are provided so as to project radially outward of the outer peripheral portion of (10), and the strand tip protruding portions (23) and (24) form the annular portion (2). Of the strand tip portion (22) after formation, one formed by twisting the strand (21) of the wire rope body (10) five times and then one or more times, and the wire rope body (10). (4) is formed by twisting the strand (21) four times and then twisting it once or more. 5. A plurality of strands (2) extended from the wire rope body (10) are provided at the tip of the wire rope body (10) formed by twisting a plurality of strands (21).
An annular part (2) is formed by folding back 1) in an annular shape, and then the strand tip part (22) after forming the annular part (2).
Adjust the length of the strand (21) and the number of twists required for each twist of the strand tip (22) with respect to the strand (21) and each of the strands (21) of the wire rope body (10). While twisting, the locking part (3) is formed in the wire rope body (10), and then the twisted strand tips (22) are attached to the wire rope body (10). 11) to the wire rope body (1
(0) A method for manufacturing an annular locking portion in a wire rope, which comprises projecting radially outward in a predetermined position on the outer periphery of (0).