CN112981993B - Synthetic fiber rope, and concrete structure and elongated object each comprising same - Google Patents
Synthetic fiber rope, and concrete structure and elongated object each comprising same Download PDFInfo
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- CN112981993B CN112981993B CN202110204328.5A CN202110204328A CN112981993B CN 112981993 B CN112981993 B CN 112981993B CN 202110204328 A CN202110204328 A CN 202110204328A CN 112981993 B CN112981993 B CN 112981993B
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- fiber rope
- synthetic
- core wire
- fibers
- resin
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B1/00—Constructional features of ropes or cables
- D07B1/02—Ropes built-up from fibrous or filamentary material, e.g. of vegetable origin, of animal origin, regenerated cellulose, plastics
- D07B1/04—Ropes built-up from fibrous or filamentary material, e.g. of vegetable origin, of animal origin, regenerated cellulose, plastics with a core of fibres or filaments arranged parallel to the centre line
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
Abstract
The invention provides a synthetic fiber rope which has moderate bending easiness and can be fixed in concrete with high fixing efficiency, and a concrete structure and a long object containing the synthetic fiber rope. A carbon fiber rope (1) is provided with: a core wire (2) in which a plurality of carbon fibers (4) impregnated with a thermosetting resin (5) are bundled; and a plurality of side wires (3) for bundling a plurality of carbon fibers (4) impregnated with a thermosetting resin (5). The thermosetting resin (5) is in a cured state, and each of the plurality of side wires (3) is set by resin curing. Each of the plurality of shaped lateral wires (3) is twisted around the core wire (2).
Description
The present application is filed as a divisional application entitled "synthetic fiber rope, and concrete structure and elongated object comprising the same", which was filed as 2016, 29/6/2016 and has an application number of 201610495035.6.
Technical Field
The present invention relates to a synthetic fiber rope, and a concrete structure and an elongated object each including the same.
Background
[ Prior art documents ]
[ patent document ]
Patent document 1: japanese patent laid-open No. 2000-110365
And (3) punching a long hole in the reinforced concrete column, and knocking the carbon fiber rod-shaped body into the long hole. Then, the remaining space in the elongated hole is filled with a curable resin in a fluidized state, whereby the carbon fiber rod-like body is fixed to the concrete. The carbon fiber rod-like body is fixed to the concrete only by a fluid curable resin in contact with the surface thereof.
Disclosure of Invention
The invention aims to provide a synthetic fiber rope which can make concrete invade the inside of the rope to increase the contact area between the rope and the concrete and improve the fixing efficiency.
Another object of the present invention is to provide a synthetic fiber rope which is excellent in workability and which undergoes moderate bending when bent.
The synthetic fiber rope according to the present invention includes: a core wire having a plurality of synthetic fibers impregnated with a resin, the plurality of synthetic fibers being bundled; and a plurality of lateral wires each having a plurality of synthetic fibers impregnated with a resin, the plurality of synthetic fibers being bundled together, the resin being in a cured state, the plurality of lateral wires being each set by the curability of the resin, the plurality of lateral wires after the setting being in a state of being twisted around the core wire.
The core and the side wires, which are composed of a plurality of synthetic fibers impregnated with a resin, maintain the shape when the resin is cured by curing the resin. In the case of a thermosetting resin, the resin is cured by applying heat, and in the case of a thermoplastic resin, the resin is cured by cooling. When the resin is cured in a state in which a predetermined shape is imparted, the core wire and the side wire can continue to maintain the shape thereafter.
The synthetic fibers (not natural fibers such as cotton or silk but fibers made of a chemically synthesized polymer compound) constituting the core and the side wires include carbon fibers, glass fibers, boron fibers, aramid fibers, polyethylene fibers, PBO (poly-phenylene benzobisoxazole) fibers, and other fibers. These fibers are very fine, and can be impregnated with a resin by bundling a plurality of synthetic fibers.
The synthetic fiber rope is configured such that a plurality of side wires, which are preliminarily fixed by the curability of the resin, are twisted around the core wires. According to the present invention, by the sizing of the side wires by the resin curing in advance, an appropriate space or gap can be secured within the synthetic fiber rope, specifically, between the core wire and the surrounding side wires and between the adjacent side wires without substantially impairing the twisted state.
Since the core wires and the surrounding side wires constituting the synthetic fiber rope are respectively the resin-cured state of the wires, slippage (misalignment) is allowed between the core wires and the surrounding side wires and between the adjacent side wires. Thus, a synthetic fiber rope which is easy to generate appropriate deflection when being bent and has excellent operability is provided. For example, an elongated synthetic fiber rope can be wound into a small-diameter reel to be compact, and the operation at a work site becomes easy. The synthetic fiber rope according to the invention is suitable for use as a reinforcing material for other long parts or equipment, such as electric wires (transmission lines), optical fiber cables, submarine cables, etc.
In one embodiment, for each of the core wire and the plurality of side wires, there are both a contact portion where the side wire is in contact with the core wire (present in the longitudinal direction) and a non-contact portion where the side wire is not in contact with the core wire in the longitudinal direction. That is, the plurality of side wires around the core wire have portions that do not continuously contact the core wire over the entire length in the longitudinal direction and do not contact the core wire (the side wires float from the core wire). The synthetic fiber rope is prevented from deforming by the contact portion. The non-contact portion becomes a space between the core wire and the side wire, and thus contributes to improvement of the bending easiness of the rope, and also contributes to penetration of other coagulants or coagulants such as concrete, mortar, and the like. For example, when the synthetic fiber rope is embedded in concrete, the concrete penetrates into the synthetic fiber rope, and the synthetic fiber rope is firmly fixed in the concrete. The synthetic fiber rope according to the invention is also suitable for use as a reinforcing material for concrete structures, for example.
In other embodiments, each of the plurality of side wires has both a contact portion that is in contact with an adjacent side wire and a non-contact portion that is not in contact with an adjacent side wire in the length direction. That is, the plurality of side wires around the core wire have portions that do not continuously contact with the adjacent side wires over the entire length in the longitudinal direction and do not contact with the adjacent side wires (there is a gap between the side wires). The synthetic fiber rope is prevented from deforming by the contact portion. The non-contact portion contributes to improvement in the bending easiness of the rope, and also contributes to penetration of other coagulants or coagulants such as concrete and mortar into the inside of the synthetic fiber rope.
Preferably, the contact portion and the non-contact portion are also repeatedly present in the longitudinal direction with respect to any one of the contact portion and the non-contact portion between the core wire and the side wire, and the contact portion and the non-contact portion between adjacent side wires. Thereby providing a cord that is easily bendable over its entire length. In the case where such a synthetic fiber rope is used for a concrete structure, an inner space that allows penetration of concrete can be dispersed and secured in the longitudinal direction of the synthetic fiber rope, and an inlet that allows penetration of concrete from the outside to the inside can be dispersed and secured.
Drawings
Fig. 1 is a front view of a carbon fiber rope.
Fig. 2 is an exploded perspective view of the carbon fiber rope.
Fig. 3 is an enlarged sectional view taken along line III-III of fig. 1.
Fig. 4 is an enlarged sectional view taken along line IV-IV of fig. 1.
Fig. 5 is an enlarged sectional view taken along line V-V of fig. 1.
Fig. 6 is a graph showing the results of the concrete drawing test.
Detailed Description
Examples
Fig. 1 shows the appearance of a carbon fiber rope. Fig. 2 is an exploded perspective view of the carbon fiber rope. Fig. 3 to 5 are enlarged cross-sectional views of the carbon fiber rope taken along the lines III-III, IV-IV, and V-V of fig. 1, respectively.
The carbon fiber rope 1 is constituted of one core wire 2 and six side wires 3 (3 a to 3 f) stranded around the core wire (1 × 7 structure). The carbon fiber rope 1, the core wire 2, and the side wire 3 each have a substantially circular shape as viewed in cross section. In addition, the carbon fiber rope 1 has a core wire 2 disposed at the center thereof as viewed in cross section, and six side wires 3 are provided so as to surround the core wire 2. The carbon fiber rope 1 has a diameter of about 5mm to 20mm, for example.
Since the core wire 2 and the side wire 3 are each a bundle of a plurality of, for example, tens of thousands of long carbon fibers 4 impregnated with a thermosetting resin (for example, an epoxy resin) 5 and bundled into a circular cross section, the carbon fiber rope 1 as a whole contains about hundreds of thousands of carbon fibers 4. Each carbon fiber 4 is very fine, having a diameter of, for example, 5 μm to 7 μm. The core wire 2 and the side wire 3 may be formed by bundling a plurality of carbon fibers 4 impregnated with the thermosetting resin 5 and twisting the carbon fibers. The core wire 2 and the lateral wires 3 may be ropes made of Carbon Fiber Composite (CFRP) (Carbon Fiber Reinforced plastics).
For the core wire 2 and the side wire 3, a cord of the same thickness (cross-sectional area) is used in the present embodiment. However, it is also possible to use a lateral thread 3 which is thinner than the core thread 2 or thicker than the core thread 2. The thickness of the core wire 2 and each of the side wires 3 can be arbitrarily adjusted by the number of carbon fibers 4.
As both the core wire 2 and the side wire 3 constituting the carbon fiber rope 1, a rope in which the thermosetting resin 5 is cured by applying heat in advance is used. That is, the carbon fiber rope 1 is produced by arranging the side wires 3 in a twisted state in a state in which they are cured by thermosetting of the thermosetting resin 5 around the core wires 2 in a state in which they are cured by thermosetting of the thermosetting resin 5. Since the thermosetting resin 5 of each core wire 2 and each side wire 3 is cured, appropriate slippage is allowed between the core wire 2 and the side wire 3 therearound, and the side wires 3 each other.
Referring to fig. 2, the 6 strands 3 twisted around the core wire 2 are all shaped in a spiral shape in advance, while the core wire 2 does not have a spiral shape. Needless to say, the spiral shape of the side wires 3 is set before the thermosetting resin 5 is thermally cured. The helical shaped lay lengths of the respective side wires 3 are substantially the same, and the helical inner diameter of the respective side wires 3 is substantially the same as the diameter of the core wire 2.
Here, each side wire 3 has a portion (hereinafter, referred to as an expanded portion) which is shaped so as to be slightly expanded partially outward. In the carbon fiber rope 1 shown in fig. 1, four expanded portions 3A to 3D are shown slightly emphasized.
Referring to fig. 3, when the portion having the swollen portion 3A is viewed in cross section, 1 (side line 3A) of 6 side lines 3A to 3f around the core wire 2 is not in contact with the core wire 2 and is displaced outward away from the core wire 2. In such a manner that the misalignment occurs, the side wires 3a are preliminarily shaped. By the way in which the side wire 3a is away from the core wire 2, an internal space (non-contact portion) 11 is secured between the core wire 2 and the side wire 3 a.
Since the cross section of the core wire 2 and the side wire 3 is circular, a non-contact portion (for example, in fig. 3, a space having a substantially triangular cross section formed by the core wire 2, the side wire 3c, and the side wire 3 d) is inevitably present between the core wire 2 and the side wire 3) (indicated by reference numeral 20), but the internal space 11 referred to in the present specification does not refer to the space 20 having a substantially triangular cross section, but refers to a space between the core wire 2 and the side wire 3 which is secured by previously shaping the side wire 3. By securing the inner space 11, two spaces 20 having a substantially triangular cross section are connected together.
In fig. 3, the side line 3a is in contact with one side line 3f of the two side lines 3b, 3f on both sides thereof, but is not in contact with the other side line 3b, and is shifted in a direction away from the side line 3b (the side line 3a is previously set in such a manner that such shift occurs). By the way the side line 3a is distant from the side line 3b, a gap 12 is ensured between the side line 3a and the side line 3 b.
Referring to fig. 4, when the portion having the other swollen portion 3B is viewed in cross section, two ( side wires 3e, 3 f) of the six side wires 3a to 3f around the core wire 2 do not contact the core wire 2, so that an internal space 11 is secured between the core wire 2 and the side wires 3e, 3 f. Since the side lines 3e, 3f are adjacent, the two inner spaces 11 are continuous, with the result that a wide inner space is formed. In addition, although the other side wire 3c is in contact with the core wire 2, the side wire 3c is separated from both the two side wires 3b and 3d positioned on both sides thereof, and a gap 12 is secured on both sides of the side wire 3 c.
In fig. 4, the internal space 11 is shown as a closed space, but the internal space 11 is not a space completely blocked from the outside but an open space communicating with the outside. That is, the internal space 11 secured between the core wire 2 and the side wires 3 is continuous with the above-described gap 12 secured by being separated from the two side wires 3 adjacent to each other at other positions in the longitudinal direction of the carbon fiber rope 1. The inner space 11 communicates with the outside through the gap 12.
Referring to fig. 5, four ( side wires 3b, 3C, 3e, 3 f) of the six side wires 3 around the core wire 2 do not contact the core wire 2 when the portion having the swollen portions 3C, 3D is viewed in cross section, and the internal space 11 is secured. In addition, a gap 12 is ensured between the side lines 3a and 3b, between the side lines 3c and 3d, between the side lines 3e and 3f, and between the side lines 3f and 3 a.
In this way, the positions and the number of the internal spaces 11 and the gaps 12 are different depending on the positions of the carbon fiber ropes 1 as cross sections. However, depending on the section and the position, there may be a case where the inner space 11 and the gap 12 do not occur at all, and conversely, there may be a case where none of the six side wires 3 contacts the core wire 2 all around the core wire 2. As shown in fig. 3 to 5, the sizes of the internal space 11 and the gap 12 (the distance between the core wire 2 and the side wire 3, and the distance between adjacent side wires 3) shown in the cross section are various. This means that the degree of the plurality of swollen portions 3A to 3D is various. In addition, in the carbon fiber rope 1, there is no extremely large expansion portion (the internal space 11 and the gap 12), so that the twisted state is not substantially impaired.
The above-described expanded portions are repeatedly formed in the longitudinal direction of the carbon fiber rope 1. That is, with respect to the core wire 2 and each of the plurality of side wires 3, a contact portion (a portion having no internal space 11) where the side wire 3 contacts the core wire 2 and a non-contact portion (a portion having an internal space 11) where the side wire 3 does not contact the core wire 2 repeatedly occur in the longitudinal direction. Likewise, for the adjacent side lines 3, a contact portion (a portion without the gap 12) and a non-contact portion (a portion with the gap 12) also repeatedly occur in the longitudinal direction.
The expanded portions may be provided at predetermined intervals in the longitudinal direction of each side wire 3, or may be provided at random. The expanded portions may be provided at the same intervals in the longitudinal direction for all the side wires 3, or the intervals in the longitudinal direction of the expanded portions may be made different for each side wire 3. The expanded portions are provided dispersedly in the carbon fiber rope 1, and the internal space 11 and the gap 12 are dispersedly present in the longitudinal direction of the carbon fiber rope 1.
As described above, the carbon fiber rope 1 is relatively excellent in workability because the thermosetting resin 5 of each of the core wire 2 and the side wire 3 is cured, and therefore, slippage is allowed between the core wire 2 and the side wire 3 and between the side wires 3, and further, because the carbon fiber rope has the internal space 11 and the gap 12, appropriate flexure is generated when being bent. The small-diameter reel can be wound to be compact, and the operation on the operation site is easy. The carbon fiber rope 1 is suitable for use as a core material of a long-shaped object such as a power transmission line.
In addition, the carbon fiber rope 1 can be used as a reinforcing material for a concrete structure, for example. When the carbon fiber rope 1 is embedded in concrete before solidification (newly poured concrete), the concrete enters the carbon fiber rope 1 with the gap 12 between the adjacent side wires 3 as an entrance. The concrete entering the carbon fiber rope 1 through the gap 12 enters the internal space 11 secured between the core wire 2 and the side wire 3, and as a result, the contact area between the carbon fiber rope 1 and the concrete increases. However, although the inner space 11 may not be completely filled with the concrete depending on the viscosity of the freshly poured concrete, the size of the inner space 11, the gap 12, and the like, the contact with the concrete may occur in the carbon fiber rope 1 in addition to the contact with the outer peripheral surface (surface) of the carbon fiber rope 1, and therefore the contact area between the concrete and the carbon fiber rope 1 is increased. Therefore, for example, the adhesion stress can be greatly increased as compared with a steel bar, and the carbon fiber rope 1 can be fixed to concrete with high fixing efficiency. Concrete structures include bridge girders, piers, wall railings, guard walls, and the like.
FIG. 6 is a graph showing a slip displacement (mm) on the horizontal axis and an adhesion stress (N/mm) on the vertical axis 2 ) Is/are as followsAnd (3) a graph of concrete drawing test results. The solid line in the graph indicates the test result of the carbon fiber rope 1 described above, and the broken line indicates the test result of the carbon fiber rope having no internal space 11 and no gap 12. The diameters, the numbers, and the structures of the core wires and the side wires constituting the rope, and the embedded length (attachment length) in concrete were measured under the same conditions.
The concrete pull-out test was conducted in accordance with the "test method for adhesion strength between continuous fiber-reinforced material and concrete based on pull-out test" established by the civil institute. In this test, a concrete block in which the middle portion of the carbon fiber rope was embedded in a state in which both ends thereof were protruded to the outside was produced. A tensile load was applied to the carbon fiber rope extending outward from one end of the concrete block at a predetermined load speed using a tensile tester, and the amount of displacement (slip displacement) of the carbon fiber rope extending outward from the other end of the concrete block was measured using a displacement meter.
Adhesion stress τ (N/mm) 2 ) Is calculated using the following formula.
The adhesion stress is tau = P/u.L
Where P denotes the tensile load (kN), u denotes the nominal circumference (mm) of the carbon fiber rope, and L denotes the attachment length (mm) with respect to the concrete mass.
As seen from the results of the concrete tensile test, the adhesion stress (solid line) of the carbon fiber rope 1 is greatly improved and the concrete fixing efficiency is high as compared with the adhesion stress (broken line) of the carbon fiber rope having no internal space 11 and no gap 12.
The degree of sizing of the side wires 3 in the carbon fiber rope 1 (the degree of binding achieved by the side wires 3) may be determined using the diameter D of the carbon fiber rope 1, the diameter σ of the core wires 2 constituting the carbon fiber rope 1 1 And the diameter sigma of the side wire 3 2 From D/(σ) 1 +2σ 2 ) X 100 (%) (hereinafter referred to as the fixation ratio). If the carbon fiber rope 1 has a setting ratio of about 100.1 to 105 (%), appropriate deflection occurs when the rope is bent, and the concrete fixing efficiency is also improved. However, in order to further improve the concrete fixation efficiency, attention is paid toIn the case of the soil fixation efficiency, the plurality of lateral lines 3 may be set to have a larger setting ratio of, for example, about 110%.
In the above-described embodiment, the example in which the carbon fiber rope 1 is configured by the core wire 2 and the side wire 3 obtained by impregnating the bundle of the plurality of carbon fibers 4 with the thermosetting resin 5 and applying heat thereto to cure the same has been described, but a thermoplastic resin (for example, polyamide) may be used instead of the thermosetting resin 5. Instead of the carbon fiber, other synthetic fibers such as glass fiber, boron fiber, aramid fiber, polyethylene fiber, and PBO (poly-phenylene benzobisoxazole) fiber may be used.
The present invention relates to the following aspects.
The synthetic fiber rope according to item 1, comprising:
a core wire having a plurality of synthetic fibers impregnated with a resin, the plurality of synthetic fibers being bundled; and
a plurality of lateral wires each having a plurality of synthetic fibers impregnated with a resin, the plurality of synthetic fibers being bundled respectively,
the resin is in a cured state, the plurality of lateral lines are respectively shaped by the curability of the resin,
the shaped lateral wires are respectively in a state of being stranded around the core wire.
A concrete structure according to item 6, wherein the synthetic fiber rope according to any one of items 1 to 5 is embedded in concrete.
An elongated object, characterized in that the synthetic fiber rope according to any one of the items 1 to 5 is used as a reinforcing material thereof.
Description of the reference numerals
1. Carbon fiber rope
2. Core wire
3. 3a, 3b, 3c, 3d, 3e, 3f side line
3A, 3B, 3C, 3D expanded fraction
4. Carbon fiber
5. Thermosetting resin
11. Inner space
12. A gap.
Claims (12)
1. A synthetic fiber rope is provided with:
a core wire having a plurality of synthetic fibers impregnated with a resin, the plurality of synthetic fibers being bundled into a bundle; and
a plurality of lateral wires each having a plurality of synthetic fibers impregnated with a resin, the plurality of synthetic fibers being bundled respectively,
in the synthetic-fiber rope in question,
the resin is in a cured state, the plurality of lateral lines are respectively shaped by the curability of the resin,
the shaped lateral lines are respectively in a state of being stranded around the core line,
the core wire and each of the plurality of side wires have both a contact portion where the side wire is in contact with the core wire and a non-contact portion where the side wire is not in contact with the core wire in a length direction,
the positions and the number of the contact portions and the non-contact portions are different depending on the position as a cross section.
2. A synthetic fiber rope is provided with:
a core wire having a plurality of synthetic fibers impregnated with a resin, the plurality of synthetic fibers being bundled; and
a plurality of lateral wires each having a plurality of synthetic fibers impregnated with a resin, the plurality of synthetic fibers being bundled respectively,
in the synthetic-fiber rope in question,
the resin is in a cured state, the plurality of lateral lines are respectively shaped by the curability of the resin,
the shaped lateral lines are respectively in a state of being stranded around the core line,
each of the plurality of side wires has both a contact portion contacting an adjacent side wire and a non-contact portion not contacting the adjacent side wire in a length direction,
the positions and the number of the contact portions and the non-contact portions are different depending on the position as a cross section.
3. The synthetic fiber rope according to claim 1 or 2, wherein the contact portion and the non-contact portion are repeatedly present in a length direction.
4. The synthetic fiber rope according to claim 1 or 2, wherein the side line is set to have an outwardly expanded portion by curability of the resin, thereby forming the non-contact portion.
5. Synthetic fiber rope according to claim 1 or 2, wherein said synthetic fibers are selected among carbon fibers, glass fibers, boron fibers, aramid fibers, polyethylene fibers and PBO fibers.
6. The synthetic fiber rope according to claim 1 or 2, wherein said synthetic fiber rope has a diameter of 5-20 mm.
7. A synthetic fibre rope according to claim 1 or 2, wherein the synthetic fibres have a diameter of 5-7 μm.
8. A synthetic fibre rope according to claim 1 or 2, wherein the thickness of the core wire and the side wires is the same.
9. A synthetic fibre rope according to claim 1 or 2, wherein the thickness of the core wire and the thickness of the side wire are different.
10. The synthetic fiber rope according to claim 1 or 2, wherein when the diameter of the synthetic fiber rope is D, the diameter of the core wires constituting the synthetic fiber rope is σ 1 The diameter of the side line is sigma 2 From D/(σ) 1 +2σ 2 ) The setting ratio represented by X100% is 100.1-110%.
11. A concrete structure in which the synthetic fiber rope according to claim 1 or 2 is embedded in concrete.
12. An elongated object, wherein the synthetic fiber rope according to claim 1 or 2 is used as a reinforcing material thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110204328.5A CN112981993B (en) | 2016-06-29 | 2016-06-29 | Synthetic fiber rope, and concrete structure and elongated object each comprising same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610495035.6A CN107541973B (en) | 2016-06-29 | 2016-06-29 | Synthetic fiber rope, and concrete structure and elongated object each comprising same |
| CN202110204328.5A CN112981993B (en) | 2016-06-29 | 2016-06-29 | Synthetic fiber rope, and concrete structure and elongated object each comprising same |
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| CN201610495035.6A Division CN107541973B (en) | 2016-06-29 | 2016-06-29 | Synthetic fiber rope, and concrete structure and elongated object each comprising same |
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| CN112981993A CN112981993A (en) | 2021-06-18 |
| CN112981993B true CN112981993B (en) | 2022-12-30 |
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| JP2012082530A (en) * | 2010-10-06 | 2012-04-26 | Sumitomo Denko Steel Wire Kk | Annular metal cord, endless metal belt having the same and method for manufacturing the same |
| JP2016080658A (en) * | 2014-10-22 | 2016-05-16 | 新日鉄住金エンジニアリング株式会社 | cable |
| CN204551120U (en) * | 2015-04-22 | 2015-08-12 | 江苏宝钢精密钢丝有限公司 | A kind of rubber belt track steel cord |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112981993A (en) | 2021-06-18 |
| CN107541973A (en) | 2018-01-05 |
| CN107541973B (en) | 2021-03-16 |
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