JP2005213683A - Highly flexing resistant rope and method for producing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a highly flexing resistant rope having high durability while keeping a conventional flexibility and strength. <P>SOLUTION: The highly flexing resistant rope 10 is composed of a core rope 12 and six side strands 13 twisted around the core rope 12 so as not to form spaces. The core rope 12 is obtained by twisting a core strand 15 having a Wallington type W(19) structure, with six side strands 16 twisted around the core strand 15 so as to keep line contact with each other, and having the Wallington type W(19) structure. The side strand 13 has the Wallington type W(19) structure. Each of the strands is impregnated with a grease and the whole amount of the grease is 0.5-5wt.% based on the whole amount of the rope. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a high bending durability rope. More particularly, the present invention relates to a high bending durability rope used for power transmission in industrial machines such as a printing machine, a loom, a water purification tank drive mechanism, and other various fields.

JP-A 63-285313 Japanese Utility Model Publication No. 57-131622 JP 07-279940 A Wirerop Handbook Editorial Committee edited by Shiro Shobo Showa 42-10-15 Figure 3.64 on page 263 of "Wirerop Handbook" Page 185 of "Wirerop Handbook"

  In many cases, a rope used for a drive mechanism of a printing machine, an opening of an automatic loom, or a water purification tank is repeatedly bent and stretched by a pulley for changing the direction. At this time, since the secondary bending stress amplitude received by the rope element wire exceeds the fatigue limit, the durability of the rope is remarkably lowered. The secondary bending refers to a local bending that occurs when the strand is pressed against the underlying strand layer when the rope is subjected to external pressure. In general, the maximum amplitude of this secondary bending dominates the life of the strands and thus the rope. In general, it is effective to reduce the wire diameter in order to reduce the stress amplitude of the secondary bending, and the strand uses a so-called cross-twisted (19 + 8 × 7) + 6 × 19 double twisted rope. In some cases, sufficient durability cannot be obtained.

  Further, the 7 × W (19) structure (see Patent Document 1) or the (7 × 7) + 6 × W (19) structure (Non-Patent Document 1) in which the strands are twisted in a Warrington type that is a kind of parallel twist. The double twisted rope (see Fig. 1) may be used, but sufficient durability is not obtained.

  On the other hand, the rope has been conventionally twisted so that the tightening rate is about 0 to 2% in order to prevent damage during twisting. The tightening rate here refers to a value (percentage: percentage) obtained by dividing a value obtained by subtracting the actually measured outer diameter from the calculated outer diameter by the calculated outer diameter. However, the calculated outer diameter refers to the total sum of the outer diameters of the strands in the rope diameter direction, and the measured outer diameter refers to a value obtained by actually measuring the diameter of the circumscribed circle of the rope. Further, the preform is formed on the side strand so that the measured outer diameter of the rope and the shaping ratio obtained by removing the waviness diameter of the side strand when the rope is loosened is about 95 to 100%. It is said that fatigue resistance is improved by performing (see Non-Patent Document 2).

In order to prevent deformation, a rope having a synthetic resin coating on the outer periphery of the rope as disclosed in Patent Document 2 may be used.
Furthermore, the high bending durability of the double twist structure having the (W (19) + 8 × 7) + 6 × W (19) structure in which the core strand of the core rope and the side strand twisted around the core rope are of the Warrington type A rope is disclosed in Patent Document 3.

  When an endurance test was performed on a double twisted rope (19 + 8 × 7) + 6 × 19 structure with a roll, the fatigue rope started to break from the strands of the core rope, and at the same time the parent rope side The strands of the strand also sporadically break away. This is because the bending fatigue durability of the side strands of the core rope and the core rope is low. In addition, when a durability test is performed on a Woolington-type 7 × W (19) structure double-rolled rope using a roller, fatigue breakage begins from the core strand, but the side strands undergo fatigue breakage after considerable time. . This is because the side strand has good bending fatigue durability, but because the strand diameter of the core strand is large, the bending stress increases, and the tension load of the core strand is large, and the core strand is fatigued early. As described above, in the conventional technique, sufficient high bending durability cannot be obtained, and there is a big problem.

  The present invention has been made to solve such a problem, and an object of the present invention is to provide a high-bend durability rope having higher durability while maintaining the conventional flexibility or strength.

  The high bending durability rope of the present invention (Claim 1) includes a core strand composed of a plurality of strands twisted in parallel twist, and a plurality of strands composed of a plurality of strands twisted around the core strand. A core rope composed of side strands, and a plurality of side strands composed of a plurality of strands twisted around the core rope, each of which is impregnated with grease, It is characterized in that the amount is 0.5 to 5 wt% with respect to the entire rope.

  The second aspect (Claim 2) of the high bending durability rope of the present invention is a core strand composed of a plurality of strands twisted in parallel twist, and a plurality of strands twisted around the core strand. A rope composed of a core rope composed of a plurality of side strands composed of a wire and a plurality of side strands composed of a plurality of strands twisted around the core rope, The strands of the outer layer are characterized by having an inclination angle of 3 to 8 degrees with respect to the axial direction of the entire rope.

  In any of the high bending durability ropes described above, at least one of the side strands of the core rope and the side strands of the rope is preferably a parallel twist (Claim 3), and the outer diameter of the rope is 3 to 8 mm. (Claim 4).

  A synthetic resin coating is preferable (Claim 5), the coating thickness is 0.5 to 3 mm (Claim 6), and the synthetic resin is a flexible polyamide resin composition, polyester. What is a resin composition or a polyurethane resin composition is preferable (Claim 7). Further, it is preferable that the tightening rate of the core rope is 4 to 11% and the shaping rate is 65 to 90%. The tightening rate here refers to the value obtained by subtracting the actual measured value that is the diameter of the circumscribed circle of the rope from the calculated outer diameter that is the sum of the diameters of the outer diameters of the strands that make up the rope. The value excluding the calculated outer diameter is displayed as a percentage. The shaping rate is a percentage obtained by removing the waviness diameter of the side strand when the rope is loosened by the actually measured outer diameter of the rope.

  Next, in the high bending durability rope of the present invention, the core strand has a W (19) structure of a Warrington type, has N side strands of the core rope, and has M side strands of the rope. M and N are integers and are preferably in the range of M ≧ 6, N ≧ 6, and N ≧ M (Claim 9). The core strand of the core rope and the side strand of the rope are made into a structure of W (19) of Warrington type, the side strand of the core rope is made into 8 bundles of 1 × 7 structure, and the side strands of the rope are made into 6 bundles (W (19) + 8 × 7) + 6 × W (19) structure (claim 10).

A third aspect of the high bending durability rope of the present invention (Claim 11) includes a core strand composed of a plurality of strands twisted in parallel and a plurality of strands twisted around the core strand. A core rope composed of N side strands, and M side strands twisted around the core rope, and the side strands of the rope so as to enter the valleys of the side strands of the core rope. It is characterized by being twisted at the same pitch as the side strands of the core rope. However, it is in the range of M = N ≧ 6.
Further, the core strand of the core rope, the side strand, and the side strand of the rope are all made into a Warrington type W (19) structure, and each of the core rope and the side strand of the rope is made into six bundles (W (19) + 6 × W (19)) A structure of + 6 × W (19) is preferable.

  According to a fourth aspect of the highly flexible durable rope of the present invention (Claim 13), there are provided a core strand composed of a plurality of strands twisted in parallel twist, and a plurality of strands twisted around the core strand. A core rope composed of a plurality of side strands made of wire, and a plurality of side strands made of a plurality of strands each having an outer diameter somewhat smaller than the outer diameter of each core rope twisted around the core rope It is characterized by being composed.

  And the manufacturing method (Claim 14) of the high bending durability rope of this invention is the several side which consists of several strands around the core rope comprised from the several strand which consists of several strands. The strands are twisted together, impregnated with grease, and then coated with a synthetic resin.

  The high bending durability rope of the present invention (Claim 1) is the easiest to cut, and the strands of the thin core strands are twisted by parallel twists in line contact with each other. It is hard to cause. Furthermore, the bending stress is small, the friction between the strands is small, and the fatigue due to secondary bending is also small. Since each strand is impregnated with grease and the total mass of the grease is 0.5 to 5.0 mass% with respect to the entire rope, the grease spreads between the strands, and the friction between the strands It is greatly reduced and deterioration due to buckling due to repeated friction can be prevented. When the mass of the grease is less than 0.5% by mass, the surface of all the strands is not evenly distributed, and the strands are easily broken when used for a long time. Further, when the mass of the grease exceeds 5.0 mass%, the grease comes out of the rope, so that it becomes difficult to handle.

  According to the second aspect of the high bending durability rope of the present invention (claim 2), since the strands of the outermost layer of the rope have an inclination angle of 3 to 8 degrees with respect to the axial direction of the entire rope, usually a plurality of When a high load is applied to a rope in which strands of strands are twisted together, the rope is untwisted (returned), and the strand rotates in the twist direction, but the inclination angle of the strand at the time of loading is about 0 °, The durability can be further improved.

  When at least one of the core rope and the side strand of the rope is a parallel twist, durability of the core rope and the side strand of the rope is improved for the same reason as that of the core strand.

  Also, in printing machines, looms, water purification tanks, etc., the outer diameter of 3 to 8 mm is appropriate, and if it is less than 3 mm, there is a concern that the strength will be insufficient, and if it exceeds 8 mm, the rigidity becomes high and the handling becomes very difficult.

  The outermost layer provided with a synthetic resin coating layer (Claim 5) can protect the outermost layer metal strands and prevent the metal strands from being loosened. The thickness of the coating is suitably 0.5 to 3 mm, so that if the coat thickness is thin, the effect of the coat is not obtained, and if it exceeds 3 mm, the rigidity becomes too high (Claim 6). When such a coating layer is composed of a flexible polyamide resin composition, a polyester resin composition or a polyurethane resin composition (Claim 7), the durability of the rope can be improved without impairing the flexibility of the rope. it can.

  In any of the above-described ropes, when the tightening rate of the core rope is 4 to 11% and the shaping rate is 65 to 90% (Claim 8), the rope is made of a normal metal strand. Since it is also tightly twisted, it is possible to prevent the mold from being deformed, and as a result, the secondary bending of the strands hardly occurs. In addition, by reducing the shaping ratio, the side strand of the twisted rope has a force to tighten in the center direction of the rope, so that it can be prevented from being deformed and secondary bending occurs. It becomes difficult.

  When the core strand has a W (19) structure of Warrington type, the core rope has N side strands and M rope side strands (where M and N are integers and M ≧ 6, N ≧ 6, N ≧ M), and the core strand of the core rope and the side strand of the rope are made into a structure of W (19) of the Warrington type, and the side strands of the core rope are 8 bundles of 1 × 7 structure In the case of (W (19) + 8 × 7) + 6 × W (19) structure (provided that M = N ≧ 6) in which the rope side strands are 6 bundles, it is particularly high as a rope used for high bending. Durability can be obtained. Also, the Warrington type is easy to make because it is possible to set the diameter of each strand closest to the parallel twist.

In the third aspect of the high bending durability rope of the present invention, the rope side strands are twisted at the same pitch as the core rope side strands so as to enter the valleys of the side rope strands. The contact angle between the strands and the strands of the rope side strands is reduced. Further, the outer diameter of the entire rope can be reduced. Therefore, with the same rope outer diameter, the breaking load can be increased, and the bending durability can be greatly improved (claim 11).
Further, the core strand of the core rope, the side strand, and the side strand of the rope are all made into a Warrington type W (19) structure, and each of the core rope and the side strand of the rope is made into six bundles (W (19) + 6 × W (19)) + 6 × W (19) structure is particularly preferable (claim 12).

  A fourth aspect (Claim 13) of the high bending durability rope of the present invention is a core strand composed of a plurality of strands twisted in parallel twist, and a plurality of strands twisted around the core strand. A core rope composed of a plurality of side strands made of wire, and a plurality of side strands made of a plurality of strands each having an outer diameter somewhat smaller than the outer diameter of each core rope twisted around the core rope Since it is comprised, the compression of the strand of a side strand can be suppressed and the durability as a whole is high.

  In the manufacturing method of a high bending durability rope according to the present invention (claim 14), a rope comprising a plurality of strands that are twisted in a complex manner is twisted, and the untreated rope is impregnated with grease. It is much easier to twist the rope compared to the case where it is twisted. Moreover, the viscosity of the grease kept at a high temperature is low, and the gap between the strands is impregnated. Therefore, even after twisting a rope composed of a plurality of strands, grease can be provided evenly on the surface of each strand. And since the coat layer is provided on these, not only the direct contact with the outside is prevented, but also the effect of the grease can be maintained for a long time, and a highly durable rope can be manufactured.

  Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view showing an embodiment of the high-bend durability rope of the present invention, FIGS. 2a and 2b are cross-sectional views of a core rope side strand and a rope side strand of the rope of FIG. 1, respectively, and FIG. Sectional drawing which shows other embodiment of the high bending durability rope of this, FIG. 4 is the schematic of the durability test of the high bending durability rope of this invention.

  FIG. 1 shows an embodiment of the high bending durability rope of the present invention. The high bending durability rope 10 includes a rope body 11 including a core rope 12 and six rope side strands 13 twisted around the core rope 12 at a predetermined interval, and a coat layer 14. Yes.

  The core rope 12 includes a core strand 15 and six core rope side strands 16 twisted around the core strand 15 at a predetermined interval. The core strand 15 is obtained by twisting 19 strands into a Warrington type, which is a kind of parallel twist, and is twisted around the core wire 17 and the core wire 6 as shown in FIG. 2a. The first layer 18 is composed of a single strand, and the second layer 19 is composed of 12 strands arranged around the first layer. The second layer 19 is formed by alternately twisting thick strands 20 and thin strands 21. The twist is Z twist, and the twist pitch is 5 to 10 times the outer diameter of the core strand of the core rope. The diameters of the core wire 17 and the thick strand 20 of the second layer 19 are substantially the same, for example, 15 to 30%, particularly 21 to 25% of the outer diameter of the core strand is preferable. The diameter of the thin strand 21 of the second layer 19 is preferably about 13 to 22%, particularly preferably 15 to 19%, of the core strand of the core rope.

  The side strands 16 of the six core ropes are each formed by twisting 19 strands into a Warrington type, and are the same as the core strand 15 except that the twist is an S twist. As shown in FIG. 2b, it consists of a core wire 23, a first layer 24 consisting of six strands around it, and a second layer 25 consisting of 12 strands provided outside it. The diameters of the core wire 23 and the thick strand 26 of the first layer 24 are substantially the same, for example, 15 to 30%, particularly 21 to 25% of the outer diameter of the side strand of the core rope is preferable. The diameter of the thin strands 27 of the second layer 25 is preferably about 13 to 22%, particularly preferably 15 to 19%, of the side strand diameter of the core rope.

  A core rope can be formed by twisting the side strand 16 around the core strand 15 in a Z twist at a pitch of 6 to 8 times the outer diameter of the core rope. The outer diameter is 38 to 43% of the rope outer diameter, and 39 to 41% is particularly preferable. Moreover, the outer diameter of the core strand is preferably 1.05 to 1.5 times the outer diameter of the side strand. Thereby, the side strands of the six core ropes can be twisted without competing.

  The rope side strands 13 are 19 strands twisted in a Warrington shape and have the same configuration as the side strands 16 of the core rope 12. The diameter of the strand is preferably the same ratio as the side strand of the core rope.

  The side strands 13 of these ropes are arranged in the concave portion formed on the surface of the core rope 12, that is, the concave portion formed between the side strands 16 of the core rope, and the same pitch as the twisting pitch of the core rope. The rope body 11 can be formed by twisting together. In such a rope body 11, the outer diameter of the core rope 12 is about 1.05 to 1.5 times the outer diameter of the rope side strand 13 (the rope side strand is 0.66 to 0.95 times the core rope). ), Preferably 1.1 to 1.3 times (the rope side strand is 0.76 to 0.90 times the core rope). When the outer diameter of the core rope 12 is less than 1.05 times the outer diameter of the rope side strand 13, the core rope 12 and the rope side strand 13 cannot be twisted well, and more than 1.5 times If it is large, a gap is opened between the side strands of the rope, which is not preferable. Moreover, it is preferable that the strand of the second layer of the rope side strand has an inclination angle of 3 to 8 degrees with respect to the axial direction of the entire rope body 11. Thereby, the more durable rope main body 11 can be obtained.

  The coat layer 14 is a synthetic resin coating layer covering the rope body 11 and has a thickness of 0.5 to 3.0 mm, particularly preferably 0.6 to 1.2 mm. The material may be polyethylene (PE), polypropylene (PP), polyamide (PA), polyester resin, or any other synthetic resin, particularly polyamide 12 (PA12) or polyamide 11 (PA11) or polyester resin. Those are preferred. Among them, it is more preferable to use a flexible polyamide resin, a polyester elastomer or a polyurethane elastomer. The coating layer preferably has a flexural modulus (ASTMD 790) of 0.2 to 1.4 MPa.

  In general, those having an outer diameter of 3.0 to 8.0 mm are preferred. Particularly, when the diameter is 4.0 to 6.0 mm, it is used for looms, and when it is 6.0 to 8.0 mm. Used for water purification tanks. By being configured in this manner, a material having high bending stress, strong and excellent fatigue resistance can be formed.

  Further, in such a high bending durability rope, it is preferable that the grease is provided uniformly on all the strands so that the grease is 0.5 to 5.0 mass% with respect to the entire rope. Thereby, even if it is used for higher bending, it is possible to generate a highly durable rope with little deterioration due to breakage of the strands. Furthermore, a highly durable rope can be obtained by providing the coat layer 14 made of a synthetic resin thereon. In particular, when the coat layer 14 is provided on the rope body 11 impregnated with grease, the effect of the grease can be maintained for a long time.

  Such a high bending durability rope 10 is prepared by preparing strands used for the core strand 15, the side strand 16, and the rope side strand 13 of the core rope 12, twisting the rope body 11, and then the untreated rope. It is manufactured by impregnating grease maintained at an appropriate temperature for impregnation from above, and then coating the coating layer 14 by extrusion. As a result, it is possible to obtain a material in which grease is thoroughly applied to the entire surface of the strand. In such a production method, the grease is preferably impregnated while being kept at 10 to 80 ° C, particularly preferably 20 to 30 ° C. Further, as a method of twisting such a rope, it is preferable to twist the core rope in one step simultaneously with the side strand of the rope in a form in which the side strand of the core rope is fitted between the valleys inside the side strand of the rope. Thereby, a twist process can be reduced. In this manufacturing method, the rope is twisted and then impregnated with grease. However, the strand may be impregnated with grease before twisting or when twisting. As such grease, it is preferable to use lithium grease or the like based on mineral oil. Further, as the synthetic resin used for the coat layer, those having low permeability to grease, such as PE, PA12, polyester elastomer, polyurethane elastomer, and the like are preferable.

  FIG. 3 shows a second embodiment of the high bending durability rope of the present invention. The high bending durability rope 30 includes a rope body 33 including a core rope 31 and six rope side strands 32 twisted around the core rope 31 at a predetermined interval, and a coat layer 34. Yes.

  The core rope 31 includes a core strand 35 and eight side strands 36 twisted around the core strand 35 at a predetermined interval. The core strand 35 is the same as the core strand 15 of FIG. 1, and is formed by twisting 19 strands into a Warrington type. The side strands 36 of the core rope are each formed by twisting seven strands, the twist is S twist, and the pitch is preferably 8 to 15 times the outer diameter of the side strand of the core rope. The core rope 31 can be formed by twisting the side strand 36 around the core strand 35 in a Z twist at a pitch of 6 to 9 times the outer diameter of the core rope. The diameter is 35 to 40% of the outer diameter of the core rope, and particularly preferably 36 to 38%.

  The rope side strands 32 are 19 strands twisted in a Warrington shape and are the same as the rope side strands 13 of FIG. The same applies to the diameter of the wire. A rope body 33 can be formed by twisting the rope side strands 32 at a predetermined interval around the core rope 31 at a pitch of 6 to 8 times the outer diameter of the rope. The diameter of the rope body 33 is preferably the same as that of the high bending durability rope 10 of FIG. As described above, it is preferable that the outer diameter of the core rope 31 is about 1.05 to 1.5 times the outer diameter of the rope side strand 32, particularly about 1.1 to 1.3 times. Some cases are preferred. In the rope body 33, the strand of the second layer of the rope side strand 32 has an inclination angle of 3 to 8 ° with respect to the entire axial direction of the rope 21, as in the rope body 11 of FIG. 1. Is preferred. The coat layer 34 to be coated on the rope body 33 is the same as the coat layer 14 of FIG. 1, and the thickness is preferably 0.5 to 3.0 mm, and 0.6 to 1.2 mm. Are particularly preferred.

[Example 1]
The high-bend durable rope 10 of FIG. 1 was manufactured using a JIS G3506 hard steel wire SWRH62A. The element wire is subjected to Zn plating. The twisted rope was impregnated in grease at 25 ° C., and the amount of grease was 1.9% by mass. In addition, the strand of the outermost layer of the side strand of the rope was set to have an inclination angle of 4.8 degrees with respect to the axial direction of the entire rope. Furthermore, the tightening rate of the core rope was 6.6%, and the shaping rate of the core rope was 85.2%. The coat layer 13 was coated with polyamide 12 having a flexural modulus of 0.35 MPa.

[Example 2]
The high-bend durability rope 30 of FIG. 3 was manufactured using a JIS G3506 hard steel wire SWRH62A. The element wire is plated with Zn. A rope in which these were twisted was impregnated in grease at 25 ° C., and the amount of grease was 2.1 mass%. The strands of the outermost layer of the side strands of the rope were set to have an inclination angle of 3.7 degrees with respect to the axial direction of the entire rope. Furthermore, the tightening rate of the core rope was 6.8%, and the shaping rate of the core rope was 80.1%. The coat layer 34 was coated with polyamide 12 having a flexural modulus of 0.35 MPa.

[Example 3]
The high-bend durability rope 30 of FIG. 3 was manufactured using a JIS G3506 hard steel wire SWRH62A. The element wire is plated with Zn. A rope in which these were twisted was impregnated in grease at 25 ° C., and the amount of grease was 1.5 mass%. In addition, the strand of the outermost layer of the rope side strand was inclined at 10.8 degrees with respect to the axial direction of the entire rope. Furthermore, the tightening rate of the core rope was 2.1%, and the shaping rate of the core rope was 90.9%. The coat layer 34 was coated with polyamide 12 having a flexural modulus of 0.35 MPa.

[Comparative Example 1]
As Comparative Example 1, a conventionally known rope 40 shown in FIG. 5 was used. The rope 40 of FIG. 5 is provided with a coat layer 44 on the outer periphery of a rope main body 43 in which six side strands 42 are twisted in parallel twist around a core strand 41. Each strand 41, 42 is a Warrington type consisting of 19 strands.
The material of the strand used for this rope 40 is JIS G3506 hard steel wire SWRH62A plated with Zn. The material of the coat layer 44 is polyamide 12 having a flexural modulus of 0.35 MPa.

[Comparative Example 2]
As Comparative Example 2, a conventionally known rope 50 shown in FIG. 6 was used. In the rope of FIG. 6, the core strand 51 and the side strand 52 of the rope are substantially the same as the core strand 15 shown in FIG. 2a, and are formed by alternately twisting thin strands and thick strands. Other than that, it is substantially the same as the rope 40 shown in FIG.
As a material for the strands of the core rope 50, Zn-plated JIS G3506 hard steel wire SWRH62A was used. The coat layer was coated with polyamide 12 having a flexural modulus of 0.35 MPa.

  Table 1 shows the outer diameter of the strands used in Examples 1, 2, and 3 and Comparative Examples 1 and 2, the twisting conditions, and other configurations.

  Using the ropes of Examples 1, 2, and 3 and Comparative Examples 1 and 2 described above, a high bending durability test of the rope was performed using the measuring apparatus shown in FIG. In the durability test, the pulley diameter was 150 mm, 200 mm, 300 mm, load (W) 2000 N, test speed (v) 450 rpm. Table 2 shows the cuts of the wires used at that time.

  From Table 2, Examples 1 and 2 showed good results in 50 million endurance tests under any high bending condition. In particular, in Example 1, no wire breakage was observed in any of the durability tests, and in Example 2, only two side strands were cut when the pulley diameter was 150 mm. In Example 3 as well, a little less than 70% of the strands were cut in the endurance test with a pulley diameter of 150 mm, but only about 10% of the strands were cut when the pulley diameter was 200 mm, and no breakage was seen when the pulley diameter was 300 mm. It was.

It is sectional drawing of embodiment of the high bending durability rope of this invention. 2a and 2b are cross-sectional views of the side strands of the core rope and the side strands of the rope, respectively, of FIG. It is sectional drawing of other embodiment of the high bending durability rope of this invention. It is the schematic of an endurance test. It is sectional drawing which shows a conventionally well-known rope. It is sectional drawing which shows a conventionally well-known rope.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 High bending durability rope 11 Rope main body 12 Core rope 13 Rope side strand 14 Coat layer 15 Core rope core strand 16 Core rope side strand 17 Core wire 18 1st layer 19 2nd layer 20 Thick strand 21 Thin strand Wire 23 Core wire 24 First layer 25 Second layer 26 Thick wire 27 Thin wire 30 High durability rope 31 Heart rope 32 Rope side strand 33 Rope body 34 Coat layer 35 Heart rope heart strand 36 Heart rope side Strand

Claims (14)

A core rope composed of a core strand composed of a plurality of strands twisted in parallel twist, and a plurality of side strands composed of a plurality of strands twisted around the core strand;
It is composed of a plurality of side strands composed of a plurality of strands twisted around the core rope,
A high bending durability rope in which grease is impregnated in each strand, and the total amount thereof is 0.5 to 5 wt% with respect to the entire rope. A core rope composed of a core strand composed of a plurality of strands twisted in parallel twist, and a plurality of side strands composed of a plurality of strands twisted around the core strand;
A rope composed of a plurality of side strands made of a plurality of strands twisted around the core rope,
The high bending durability rope in which the strand of the outermost layer of the rope has an inclination angle of 3 to 8 degrees with respect to the axial direction of the entire rope. The high bending durability rope according to claim 1 or 2, wherein at least one of the side strand of the core rope and the side strand of the rope is a parallel twist. The high bending durability rope according to claim 1 or 2, wherein the outer diameter of the rope is 3 to 8 mm. The high bending durability rope according to claim 1 or 2, wherein a synthetic resin coating is applied. The high bending durability rope according to claim 5, wherein the coating has a thickness of 0.5 to 3 mm. The high bending durability rope according to claim 5, wherein the resin is a flexible polyamide resin composition, a polyester resin composition, or a polyurethane resin composition. The high bending durability rope according to claim 1 or 2, wherein the tightening rate of the core rope is 4 to 11% and the shaping rate is 65 to 90%. The core strand is a Wurlington type W (19) structure,
3. The high bending durability rope according to claim 1, wherein the core rope has N side strands and M rope side strands. However, M and N are integers and are in the range of M ≧ 6, N ≧ 6, and N ≧ M. The core strand of the core rope and the side strand of the rope are made into a structure of W Warrington type W (19), the side strands of the core rope are made into 8 bundles of 1 × 7 structure, and the rope side strands are made into 6 bundles (W The high bending durability rope according to claim 9 having a structure of (19) + 8 × 7) + 6 × W (19). A core strand composed of a plurality of strands twisted in parallel twist;
A core rope composed of N side strands composed of a plurality of strands twisted around the core strand;
Consists of M side strands twisted around the core rope,
A high bending durability rope in which the side strands of the rope are twisted at the same pitch as the side strands of the core rope so as to enter the valleys of the side strands of the core rope. However, it is in the range of M = N ≧ 6. The core strand of the core rope, the side strand, and the side strand of the rope are all made into a Wurlington type W (19) structure, and the core rope and the side strands of the rope are each made into six bundles (W (19) + 6 × W (19 )) The high bending durability rope according to claim 11 having a structure of + 6 × W (19). A core rope composed of a core strand composed of a plurality of strands twisted in parallel twist, and a plurality of side strands composed of a plurality of strands twisted around the core strand;
A high bending durability rope composed of a plurality of side strands made of a plurality of strands each having an outer diameter somewhat smaller than the outer diameter of each core rope twisted around the core rope. A plurality of strands made of a plurality of strands are twisted around a core rope, and a plurality of strands made of a plurality of strands are twisted together to impregnate grease, and then a synthetic resin coating is applied. A manufacturing method of a high bending durability rope.