JP7285609B1 - Composite String-shaped Body, Composite String-shaped Body Manufacturing Apparatus, and Composite String-shaped Body Manufacturing Method - Google Patents

Abstract

An object of the present invention is to provide a string-like body having high workability and high tensile strength and tensile breaking strength. SOLUTION: A composite string-like body 1 including a core 2 and a winding thread 3 spirally wound around the core 2 with a space therebetween, wherein the core 2 is made of a synthetic resin film. It is a non-twisted assembly having a plurality of cord-shaped core materials formed, and the wound yarn 3 is a continuous yarn in which a plurality of synthetic resin monofilaments are welded to each other and integrated in the horizontal direction. or multifilament composite filaments. [Selection drawing] Fig. 1

Description

TECHNICAL FIELD The present invention relates to a string-like body that is used, for example, as a reinforcing material for the edge of a sheet.

BACKGROUND ART Conventionally, cords are known which are manufactured by twisting single yarns, yarns, etc. at each stage. Single yarns and the like have the highest tensile strength when arranged parallel to the length direction, but when twisted together, there is an angle in the length direction, and as a result, there is a problem that the tensile strength in particular decreases.

Patent Document 1 discloses a raw yarn obtained by spirally winding a spun yarn or continuous yarn around a non-twisted sliver made of fibers of fixed or irregular length, and twisting a plurality of yarns. A formed rope is disclosed. Patent Document 2 discloses a cord woven using untwisted yarns as warp yarns and twisted yarns as weft yarns. Since they are untwisted, they have the advantage of high longitudinal tensile strength.

By the way, in some cases, the hood of a truck or the edge of a sheet for agriculture or fishery is provided with a string-like body for reinforcement. Such a string-like body is required to improve workability during manufacture and use.

Japanese Utility Model Laid-Open No. 52-123139 Japanese Patent No. 7055310

The string-like body or thread of Patent Document 1 or Patent Document 2 has the effect of improving the tensile strength, reducing the manufacturing cost, and reducing the weight. Desired.

An object of the present invention is to provide a string-like body having high workability and high tensile strength and tensile breaking strength.

The present invention relates to a composite cord-like body comprising a core and a wound thread helically wound around the core at intervals, wherein the core is a cord formed of a synthetic resin film. It is a non-twisted aggregate having a plurality of shaped core materials, and the wound yarn is a continuous yarn or multifilament made of synthetic resin, in which a plurality of monofilaments are welded together and integrated in the horizontal direction. , is a composite filamentous body.

Here, "untwisted" means that the films are arranged parallel to each other, and the number of twists is substantially zero.

Further, the present invention provides a composite cord-like body comprising a core and a winding thread spirally wound around the core at intervals, wherein the core is formed of a synthetic resin film. It has a plurality of cord-like core materials that are twisted together with a twist number of 1 to 500 T / m, and the wound yarn is a synthetic resin monofilament that is welded to each other and integrated in the horizontal direction. Composite strands that are twisted strands, or multifilaments.

Here, "the number of twists is 1 to 500 T/m" means the so-called "soft twist" in which the number of twists per unit length is less than usual.

The composite string-like body is preferably used as a reinforcing material for the outer circumference of a sheet for agriculture or fishing or a hood sheet for a truck.

The present invention also provides a manufacturing apparatus for manufacturing the composite string-like body, comprising: a hollow spindle through which the core passes through a central hole; and a mounting section for mounting a wound yarn assembly that rotates integrally with the hollow spindle. a take-up device for taking back the core passed through the hollow spindle and the wound yarn pulled out from the wound yarn assembly and spirally wound around the core; is a composite cord-like body manufacturing apparatus characterized by being provided with a first tension applying section that applies tension to the winding yarn wound around the core.

It is preferable that the front-front winding yarn assembly is provided with a second tension applying section that applies tension to the winding yarn between the first tension applying section and the winding yarn assembly.

A manufacturing apparatus for manufacturing the composite string-like body, comprising: a hollow spindle through which the core passes through a central hole; a mounting section for mounting a wound yarn assembly that rotates integrally with the hollow spindle; and a take-up device for taking back the wound yarn pulled out from the wound yarn aggregate and spirally wound around the core, wherein While a rotation suppressing means for partially suppressing the rotation of the core is provided on the upstream side, the core is rotatable on the downstream side by the winding force of the winding yarn, and the number of twists is 1 to 500T. This is a composite string-like body manufacturing apparatus characterized by making a core part twisted at /m.

It is preferable that the rotation suppressing portion has a plurality of holes through which each of the plurality of string-shaped core members passes.

The present invention also provides a manufacturing method for manufacturing the composite cord-shaped body, wherein a plurality of cord-shaped core materials formed from a synthetic resin film are aligned without being twisted together to form a core portion, and a winding yarn is provided. The core is pulled so that the core passes through a central hole of a hollow spindle on which the assembly is mounted and rotates integrally with the wound yarn assembly, the hollow spindle is rotated, and the wound yarn assembly is rotated. The method for manufacturing the composite string-like body includes winding the winding thread from the body in a helical shape around the core part under tension.

Further, the present invention provides a manufacturing method for manufacturing the composite cord-shaped body, wherein a plurality of cord-shaped core members formed from a synthetic resin film or a core portion composed of the plurality of cord-shaped core members is rotated. means to pull the core so that the core passes through the central hole of the hollow spindle on which the wound yarn assembly is mounted and which rotates integrally with the wound yarn assembly; While the winding yarn is helically wound around the core portion from the winding yarn assembly under tension, the core portion is rotated by the winding force of the winding yarn, and the number of twists is increased. is a method for producing a composite cord-like body in which the is twisted at 1 to 500 T/m.

According to the present invention, by using a film for the core and integrating a plurality of films with a winding thread, it is possible to provide a cord that has a sense of volume as a whole and is excellent in workability. When the twist number of the film is 0 or less, the tensile strength and the tensile strength at break are increased, and a lightweight and high-strength cord-like body can be obtained. In addition, it is economical because non-standard films generated in other processes can be used.

1 is a partial front view of a composite string-like body according to a first embodiment of the present invention; FIG. FIG. 3 shows a sheet with composite cords around the perimeter. 4 is a photograph of a composite string-like body according to the first embodiment; 1 is a perspective view of a manufacturing apparatus for manufacturing a composite string-like body according to a first embodiment; FIG. FIG. 4 is a perspective view from another direction of the manufacturing apparatus for manufacturing the composite string-like body according to the first embodiment; FIG. 11 is a perspective view of a manufacturing apparatus for manufacturing a composite string-like body according to the second embodiment;

A first embodiment of the present invention will be described. As shown in FIGS. 1 and 3, the composite string-like body 1 includes a core 2 and a winding yarn 3 spirally wound around the core 2 with an interval L therebetween. The core part 2 is a non-twisted (untwisted) assembly formed by gathering a plurality of string-like core members 21 formed of a film.

The film forming the string-shaped core material 21 is made of synthetic resin such as polypropylene or polyethylene. The wound yarn 3 is a continuous yarn or multifilament in which a plurality of monofilaments are welded together and integrated in the horizontal direction, and is made of a synthetic resin such as polyethylene. As an example, the width or diameter of the winding thread 3 is 0.5 to 2 mm.

The string-shaped core material 21 is formed by stretching or folding a heated and uniaxially stretched synthetic resin film into a string-like shape. It consists of a film of 30-80 mm and a thickness of 20-200 μm. A plurality of cord-like core members 21 are aligned parallel to each other without being twisted together. The film used for the cord-shaped core material 21 may be wrinkled, taking advantage of the difference in shrinkage. An example of the diameter of the core 2 is 3 to 10 mm.

A winding thread 3 is spirally wound around the core 2 with an interval L to tighten and bind the core 2. - 特許庁The winding thread 3 keeps the core part 2 together while maintaining the voluminous feeling peculiar to the film, and together with the regular uneven feeling, the composite cord-like body 1 with high workability can be obtained. Since the core 2 is formed without being twisted together, it has a high tensile strength.

The interval L between the helically wound yarns 3 is appropriately selected according to requirements, and is, for example, 10 to 50 mm.

FIG. 3 is a photograph of the composite string-like body 1 as an example of the present invention. A winding thread 3 is helically wound around a core portion 2 which is an assembly of string-like core members 21 formed from a polypropylene resin film. The cross-sectional diameter of the core portion 2 is about 5 mm, and the winding thread 3 employs a five-strand thread (width 1.2 mm) in which polyester threads of 400 denier are arranged in the width direction and welded. The interval L between the wound yarns 3 is 22 mm.

The composite string-like body 1 of the present invention is used, for example, as a waterproof sheet for agriculture or fisheries, or as a reinforcing material for the hood of a truck. As shown in FIG. 2, for example, the composite string-like body 1 is passed through the outer periphery of the sheet 8 as a reinforcing material. In FIG. 2, the composite string-like body 1 is indicated by a solid line, but it is in a state where it is actually inserted into the seat and cannot be seen. Since an assembly formed from a plurality of films is adopted as the core part 2, there is a sense of volume and workability is high.

Next, with reference to FIGS. 4 and 5, the manufacturing apparatus and manufacturing method of the composite string-like body 1 of the present invention will be described. The manufacturing apparatus 10 includes a hollow spindle 11, a motor 14 for rotating the hollow spindle 11, and a take-up device (not shown) such as a take-up roller for taking the core portion 2 and the wound yarn 3 that have passed through the hollow spindle 11 at a predetermined speed. ). A pulley 19a on the side of the motor 14 and a pulley 19b on the side of the driven side (spindle side) are motive power transmitted by a linked belt, and the hollow spindle 11 is rotated.

The core portion 2 is an assembly of a plurality of string-like core members 21 made of film, and is pulled out from one or more pieces of cheese (not shown) via a supply roller (not shown) or the like at a predetermined speed. As shown in FIG. 4 , the pulled-out core 2 passes through a core supply port 13 formed in the axial center of the pulley 19 b and a central hole serving as the axial center of the hollow spindle 11 and is pulled out from the hollow spindle outlet 12 . be Since the core 2 does not contact the inner surface of the central hole of the hollow spindle 11 or the inner surfaces of the supply port 13 and the outlet 12, it is not affected by their rotation.

On the other hand, a cheese 15 (winding yarn assembly), which is an assembly of the winding yarns 3, is attached to the mounting portion of the hollow spindle 11 and is rotated integrally with the hollow spindle 11. As shown in FIG. The winding yarn 3 is pulled out in the axial direction by a take-up device (not shown) and wound around the core portion 2 while rotating. As shown in FIGS.

As a result, the core portion 2 passing through the central hole, which is the axis of the hollow spindle 11, is pulled out in an untwisted state, and the winding yarn 3 is helically wound around it to form a composite string. A body 1 is obtained. The obtained composite string-like body 1 is wound into cheese (not shown) by a torque motor or the like.

The rotation speed of the hollow spindle 11 and the take-up speed of the take-up device (not shown) can be appropriately changed according to the target spiral spacing L of the wound yarn. For example, if the take-up speed of the take-up device is increased without changing the rotation speed of the hollow spindle 11, the helix spacing L becomes wider. On the other hand, for example, if the rotational speed of the hollow spindle 11 is increased without changing the take-up speed of the take-up device, the spiral spacing L will become narrower. The rotation speed of the hollow spindle 11 is changed by the rotation speed of the motor 14 and the sizes of the pulleys 19a and 19b.

A connecting tube 18 on the hollow spindle outlet 12 side is tapered and gradually reduced in diameter. As shown in FIG. 5 , a nylon band 16 is wound around a portion of the tube of the hollow spindle outlet 12 , and the wound yarn 3 released from the cheese 15 is disposed between the inner surface of the nylon band 16 and the hollow spindle outlet 12 . It wraps around the core 2 after passing between the outer surface of the tube. Therefore, resistance is applied when the winding yarn 3 passes through the nylon band 16, and tension is always applied to the winding yarn 3 until it contacts the core portion 2 on the downstream side of the nylon band 16. As a result, winding is performed. The thread 3 wraps around the core 2 tightly to its center. That is, the nylon band 16 acts as a first tension imparting portion for the winding yarn 3 . As a result, even if the core portion 2 with a sense of volume is used as in the present invention, the winding thread 3 can firmly bind the plurality of core members 21 .

A rubber band 17 is wound around a part of the outer peripheral surface of the cheese 15 to control release of the wound yarn 3 from the cheese 15 . As a result, tension is always applied to the winding yarn 3 between the cheese 15 and the nylon band 16, which contributes to the winding yarn 3 being tightly wound around the core portion 2. - 特許庁The rubber band 17 acts as a second tension applying section.

The aggregate of winding yarn 3 is not limited to cheese 15 . If the diameter of the core 2 is large, the winding thread 3 must also be thickened, in which case bobbin winding is suitable.

In the present invention, since an assembly of a plurality of films is adopted as the core portion, there is volume and workability is high. In addition, as the film, it is possible to use a film that has become out of specification in another process, and it can be produced at a low cost, which is economical.

Next, the composite string-like body 101 of the second embodiment of the present invention will be described.
In the first embodiment, the core portion 2 is formed without twisting the cord-like core material 21, whereas in the composite cord-like body 101 of the present embodiment, the core portion 102 is formed by the cord-like core material 121. The difference is that it is loosely twisted (the number of twists is less than usual). In the composite string-like body 101, the core portion 102 is loosely twisted, so that the string-like core members 21 are brought together while maintaining a high tensile strength.

A manufacturing apparatus 100 and a manufacturing method for the composite string-like body 101 will be described with reference to FIG. Basically, the configuration is the same as that of the manufacturing apparatus 10 of the first embodiment, so the drawings and descriptions of the first embodiment are used for the common explanation, and differences are mainly explained.

The manufacturing apparatus 100 includes a rotation suppressing member 120 that suppresses rotation of the core 102 in front of the core supply port 113 (on the upstream side of the hollow spindle 111 in the running direction of the core). The rotation suppressing member 120 is fixed so as not to be affected by the rotation of the hollow spindle 111 and does not rotate. The rotation suppressing member 120 shown in FIG. 6 has a plurality of holes, and the string-shaped core material 121 is pulled out from each piece of cheese (not shown) and passes through each hole. The winding yarn 103 is wound around the passed string-like core material 121 after passing through the central hole of the shaft center of the hollow spindle 111 . The core 102 made of the core material 121 is allowed to rotate, so that the core 102 is loosely twisted (with a twist number of 1 to 500 T/m).

The rotation suppressing member 120 is not limited to the one described above, and may be, for example, a member having a small diameter hole that receives an assembly of the string-like core members 121 and provides resistance in the rotating direction.

The embodiments of the present invention are not limited to the above-described embodiments, and modifications and the like can be made without departing from the technical idea of the present invention. is also included in the technical scope of the present invention, and it goes without saying that various forms can be adopted as long as they fall within the technical scope.

Reference Signs List 1, 101: Composite string-like bodies 2, 102: Core 3: Winding yarns 10, 100: Manufacturing device 8: Sheets 11, 111: Hollow spindle 12: Hollow spindle outlet 13, 113: Core supply port 14: Motor 15: cheese (wound yarn aggregate)
16: Nylon band (first tension applying part)
17: rubber band (second tension applying part)
18: Connection pipes 19a, 19b: Pulleys 21, 121: String-like core material 120: Rotation restraining member
L : Spiral spacing of winding thread

Claims (8)

A composite cord-like body comprising a core and a winding thread that is spirally wound around the core at intervals, and is used as a reinforcing material for the outer periphery of a sheet for agriculture or fishery or a hood sheet for a truck. There is
The core is
A non-twisted assembly having a plurality of cord-shaped core materials formed from a synthetic resin film,
The wound yarn is
A ream or multifilament made of synthetic resin, in which a plurality of monofilaments are welded together and integrated in the horizontal direction,
Composite cord body. A composite cord-like body comprising a core and a winding thread that is spirally wound around the core at intervals, and is used as a reinforcing material for the outer periphery of a sheet for agriculture or fishery or a hood sheet for a truck. There is
The core is
An assembly having a plurality of cord-shaped core materials formed from synthetic resin films and twisted together with a twist number of 1 to 500 T / m,
The wound yarn is
A ream or multifilament made of synthetic resin, in which a plurality of monofilaments are welded together and integrated in the horizontal direction,
Composite cord body. A manufacturing apparatus for manufacturing a composite string-like body comprising a core and a winding thread helically wound around the core with a space therebetween ,
The core is
A non-twisted assembly having a plurality of cord-shaped core materials formed from a synthetic resin film,
The wound yarn is
It is a ream or multifilament made of synthetic resin, in which a plurality of monofilaments are welded together and integrated in the horizontal direction,
The manufacturing apparatus is
a hollow spindle through which the core passes through a central hole;
a mounting portion for mounting a wound yarn assembly that rotates integrally with the hollow spindle;
a take-up device for taking over the core that has passed through the hollow spindle and the wound yarn drawn out from the wound yarn assembly and spirally wound around the core;
An apparatus for manufacturing a composite cord-like body, wherein a first tension applying section for applying tension to the winding yarn wound around the core is provided at an outlet of the hollow spindle. The winding yarn assembly is provided with a second tension applying portion that applies tension to the winding yarn between the first tension applying portion and the winding yarn assembly,
The composite cord-like body manufacturing apparatus according to claim 3 . A manufacturing apparatus for manufacturing a composite string-like body comprising a core and a winding thread helically wound around the core with a space therebetween ,
The core is
An assembly having a plurality of cord-shaped core materials formed from synthetic resin films and twisted together with a twist number of 1 to 500 T / m,
The wound yarn is
It is a ream or multifilament made of synthetic resin, in which a plurality of monofilaments are welded together and integrated in the horizontal direction,
The manufacturing apparatus is
a hollow spindle through which the core passes through a central hole;
a mounting portion for mounting a wound yarn assembly that rotates integrally with the hollow spindle;
a take-up device for taking over the core that has passed through the hollow spindle and the wound yarn drawn out from the wound yarn assembly and spirally wound around the core;
A rotation suppressing means for partially suppressing the rotation of the core is provided upstream of the hollow spindle in the running direction of the core, while the core is wound with a winding yarn on the downstream side thereof. It is characterized by being rotatable by force and having a twisted core with a twist number of 1 to 500 T / m,
Composite string-like body manufacturing equipment. 6. The composite string-like body manufacturing apparatus according to claim 5 , wherein the rotation suppressing portion has a plurality of holes through which each of the plurality of string-like core members passes. A manufacturing method for manufacturing a composite string-like body comprising a core and a winding thread helically wound around the core with a space therebetween,
The core is
A non-twisted assembly having a plurality of cord-shaped core materials formed from a synthetic resin film,
The wound yarn is
It is a ream or multifilament made of synthetic resin, in which a plurality of monofilaments are welded together and integrated in the horizontal direction,
The manufacturing method is
A plurality of cord-shaped core materials formed from a synthetic resin film are aligned without being twisted together to form a core,
pulling the core so that the core passes through a central hole of a hollow spindle on which the wound yarn assembly is mounted and which rotates integrally with the wound yarn assembly;
rotating the hollow spindle to spirally wind the winding yarn from the winding yarn assembly around the core portion under tension;
A method for manufacturing a composite cord-like body. A manufacturing method for manufacturing a composite string-like body comprising a core and a winding thread helically wound around the core with a space therebetween ,
The core is
An assembly having a plurality of cord-shaped core materials formed from synthetic resin films and twisted together with a twist number of 1 to 500 T / m,
The wound yarn is
It is a ream or multifilament made of synthetic resin, in which a plurality of monofilaments are welded together and integrated in the horizontal direction,
The manufacturing method is
Passing a plurality of string-shaped core members formed from a synthetic resin film or a core portion composed of the plurality of string-shaped core members through a rotation suppressing means,
pulling the core so that the core passes through a central hole of a hollow spindle on which the wound yarn assembly is mounted and which rotates integrally with the wound yarn assembly;
The hollow spindle is rotated to helically wind the winding yarn from the winding yarn aggregate around the core portion under tension, while the core portion is rotated by the winding force of the winding yarn. and twisted at a twist number of 1 to 500 T / m,
A method for manufacturing a composite cord-like body.

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