JPH08322634A - Joint structure of string, and its joining method - Google Patents

Abstract

PURPOSE: To provide joint structure of strings which has finishing excellent in fine view without its junction being inconspicuous when having joined strings by joining the ends without being subjected to restriction on the quality and the form of string member. CONSTITUTION: A string member 2 having a flat cut end 8 is made by cutting the hardened part 4 being hardened by impregnating the specified part of string material with an adhesive. Likewise, other string material 2 is made. The cut ends 8 of each string member 2 are butted against each other and are bonded to form a junction 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a joining portion formed when joining ends of joining a cord body such as a braid.
And a method of joining the ends thereof.

[0002]

2. Description of the Related Art For example, in order to obtain a aesthetic appearance suitable for decoration, a cord such as a braid for decoration is made by connecting cord members having different color patterns into one long cord or an accessory. A ring-shaped cord body is formed as a hanging cord. And, this kind of cord body is provided with a joint portion in which its ends are joined together when they are joined together or formed into a ring shape.

Conventionally, when the ends of the cord member are joined to each other, the end of the cord member formed of a thermoplastic material is melted and solidified to prevent unraveling, and the end that is further melted and solidified. A method is known in which parts are melted again and abutted against each other to be connected.

However, when the end portion where the fiber cross section is exposed is heat-melted, variations occur in the melted state of the fibers on the peripheral side and the fibers on the inner side which are loosened, so that if the shape of the end face is not flat. Therefore, it is difficult to bring the end faces into contact with each other with high accuracy. In addition, the ends of the string member often change color when heat-melted, and there is a disadvantage that the color of the string member is obstructed by the discolored joint. Further, in the case of a flat string member, there is a problem that it is difficult to join the ends by heat welding.

Moreover, the above-mentioned melting and solidification and fusion due to heat are limited to the string member formed of a material having thermoplasticity, and for example, natural fibers made of silk, cotton, hemp, protein or the like, The string member formed of carbon fiber, pulp yarn, polyvinyl alcohol fiber, cellulose fiber or the like has a disadvantage that it cannot be melted and solidified or fused by heat.

Therefore, as a method of joining the cord members formed of not only the thermoplastic fibers but also the above-mentioned fibers that cannot be melted by heat, there is a method of abutting the ends of the cord members and adhering them to each other with an adhesive.

However, in this type of string member, the fiber cross section is often exposed at the ends, and when the fibers are in a loosened state, it is difficult to bond the ends to each other. . Further, when an adhesive is applied to such end portions and they are adhered to each other to be joined, the joint portions are formed to be swelled due to the influence of the loose fibers, and in that state, there is a disadvantage that they are hardened and spoil the appearance. .

It is also possible to impregnate the cut ends with an adhesive, cure the ends, and then bond the ends together. This makes the work easier because the hardened ends are abutted and adhered, but even if the cut ends are impregnated with adhesive, the unevenness of the fibers remains on the abutted end faces. However, even if the ends are abutted against each other and bonded in this state, there is the inconvenience that it is not possible to expect the formation of an unobtrusive joint.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides an aesthetically pleasing joint portion when the ends are joined and joined without any restriction on the material or shape of the cord member. It is an object of the present invention to provide a cord joint structure having an excellent finish, and also to provide a cord joining method capable of easily obtaining the joint structure.

[0010]

In order to achieve such an object, the present invention provides a cord joint structure having a joint in which end portions whose fiber cross sections are exposed are joined to each other. In the embodiment, the cured material is formed by impregnating and curing the adhesive at a predetermined position of the long material cord, and the cured material is cut to form a flat cut end face and separated from the material cord. A string member is formed, a hardened part is formed by impregnating an adhesive at a predetermined position of another long material string and hardened, and a flat cut end surface is formed by cutting the hardened part to form a flattened end face. Another string member separated from the material string is formed, and the cut end surface of the string member and the cut end surface of the other string member are abutted and adhered to each other to form the joint portion. It is a thing.

In the joint portion structure of the second aspect of the present invention, a pair of hardened portions which are hardened by impregnating an adhesive at predetermined positions of a long material string are formed, and the hardened portions are cut. To form a flat cut end surface at both ends to form a string member separated from the material string, and the two cut end surfaces of the string member are
It is characterized in that the joint portion is formed by abutting and adhering to each other.

In the first aspect or the second aspect, it is preferable that, in the joint portion, the cut end surfaces of the hardened portion are bonded to each other via an adhesive of the same quality as the adhesive of the hardened portion. .

Further, the present invention is a joining method for joining the ends of a cord body in which the fiber cross section is exposed, and the first aspect thereof is to impregnate a predetermined position of a long material cord with an adhesive. To form a hardened portion that has been hardened, a step of cutting the material string at the hardened portion to form a string member having a cut end face, and impregnating a predetermined position of another long material string with an adhesive. And forming a cured portion, and a step of cutting the other material cord at the curing portion to form another cord member having cut end faces of the cured portion at both ends, and cutting the cord member. And a step of adhering the end surface and the cut end surface of the other string member via an adhesive of the same quality as the adhesive of the cured portion.

The joining method according to the second aspect of the present invention comprises a step of forming a hardened part by impregnating and hardening an adhesive at a predetermined position of a long material string, and cutting the material string at the hardening part. And a step of forming a cord member having cut end faces at both ends thereof, and a step of adhering the cut end faces of both ends of the member to each other via an adhesive of the same quality as the adhesive of the cured portion. To do.

The joining method according to the third aspect of the present invention comprises a step of forming a hardened part by impregnating and hardening an adhesive at a predetermined position of a long material string, and cutting the material string at the hardening part. To form a cord member having cut end faces at both ends thereof, a step of forming a cured portion obtained by impregnating and curing an adhesive at a predetermined position of another long material cord, and the other material cord. A step of forming another string member having cutting end faces at both ends by cutting in the curing part, and arranging the string member and the other string member in a ring shape, and cutting end faces adjacent to each other of the curing part And a step of adhering via an adhesive of the same quality as the adhesive.

In the first to third aspects of the joining method of the present invention, in the step of forming the cured portion, the cord body is impregnated with an adhesive and then a curing accelerator is applied to cure the adhesive. Preferably.

[0017]

The joint structure according to the first aspect of the present invention is a joint structure formed when a plurality of cord members having the same shape are connected to each other, and the joint structure according to the second aspect is composed of cord members. It is a structure of a joint formed by both ends of the cord when formed in a ring shape.

In the joint structure of the first and second aspects, a string member is formed by impregnating a predetermined position of a long material string with an adhesive and curing it, and then cutting the string at the curing section. Since the string member is cut at the curing portion, the fibers on the cut end face are reliably prevented from unraveling and a flat cut end face is formed. As a result, a bulge is not formed in the joint formed by adhering the flat cut end faces to each other, and the adhering work is facilitated. Furthermore, since the joint portion is formed via an adhesive, a strong joint state is obtained without being affected by the material and shape of the cord body.

Further, since the joint portion is adhered via the adhesive of the same quality as the adhesive of the cured portion, the adhesive has a high affinity when the cut end faces of the cured portion are adhered to each other. It is possible to strengthen the joined state of.

The joining method of the first aspect of the present invention is a method of joining end surfaces of adjacent string bodies when connecting a plurality of same-shaped cord bodies, and the joining method of the second aspect is a method This is a method of joining both ends of the cord body when forming the body in a ring shape. Further, the joining method of the third aspect is a method of arranging a plurality of string members in a ring shape and joining adjacent ends to each other when the string body is formed in a ring shape.

In the joining methods of the first to third aspects, first, a fiber at a predetermined position of a long material string is impregnated with an adhesive to be hardened to form a hardened portion. Then, it cut | disconnects in the said hardening part. By doing so, a cord member separated from the material cord is formed, and the end portion of the cord member is not loosened by the hardening portion. Further, since the already hardened portion is cut, the cut end face can be formed flat. Subsequently, the cut end face and the cut end face are adhered and bonded to each other via an adhesive. Since the cut end faces are formed flat, they can be accurately and quickly butted when they are bonded to each other. And the cut end surface is
Since the already hardened portion is cut and is in a state of not unraveling, a bulge is not formed at the joint even after the bonding, and high adhesion strength can be obtained by bonding the flat surfaces. Further, by making the adhesive used for adhering the cut end faces the same as the adhesive forming the cured portion, a strongly bonded joint is obtained.

In the step of forming the hardened portion, the hardened portion is formed in a short time by impregnating the fibers of the cord body with the adhesive and then applying the hardening accelerator.

[0023]

Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is an explanatory perspective view showing a cord body according to one embodiment, FIG. 2 is an explanatory view showing a part of the cord body in an enlarged manner, and FIG. 3 is an apparatus for realizing a joining method of the cord bodies. 4A and 4B are explanatory views showing a manufacturing process by the apparatus of FIG. 3, and FIGS. 5A to 5C are explanatory views showing a process following FIG. 6 and 7 are explanatory views showing another embodiment of the present invention.

As shown in FIG. 1, the cord 1 of this embodiment is
A plurality of cord members 2 in which fibers having different color patterns are twisted and knitted together are connected to each other through a joint portion 3 to form one piece. The joint portion 3 is formed by joining the tips of the hardened portions 4 formed at both ends of each cord member 2. Examples of the material of the string 1 include natural fibers made of silk, cotton, hemp, protein and the like, carbon fibers, pulp yarns, polyvinyl alcohol fibers, cellulose fibers, and thermoplastic fibers.

As shown in FIG. 2, the hardened portion 4 is hardened by impregnating the fibers at both ends of the string member 2 with the adhesive 7 and hardening the end portion 8 thereof.

The joint portion 3 is a hardened portion 4 of the string member 2.
End faces 8 of the are bonded to each other via an adhesive 9. The adhesive 7 for forming the hardened portion 4 and the adhesive 9 for joining the end surface 8 of the hardened portion 4 in the joining portion 3 are both of the same quality. Thereby, the adhesiveness of both adhesives 7 and 9 is high, and the bonded state of the end surface 8 of the hardened part 4 in the bonded part 3 can be strengthened.

Further, it is possible to prevent the fibers of the end surface 8 from being unraveled by the hardened portion 4, and since the flat end surfaces 8 of the hardened portion 4 are joined together, it is possible to prevent the rise of the joined portion 3. . Thereby, an excellent appearance can be obtained without impairing the aesthetic appearance of the cord body 1.

A cyanoacrylate adhesive is used as each of the adhesives 7 and 9, and in this embodiment, a trade name "Aron Alpha" (manufactured by Toagosei Chemical Industry Co., Ltd.)
It was used. Needless to say, the adhesives 7 and 9 may be those that can be sufficiently cured in the curing portion 4 and sufficient adhesive force can be obtained in the bonding portion 2.

Next, the manufacturing process of the cord body 1 of this embodiment will be described.

The cord 1 of this embodiment is a manufacturing apparatus 1 shown in FIG.
0 can be used. The manufacturing apparatus 10 is capable of continuously forming a plurality of string members 2 by cutting a long material string 2a wound around a replaceable bobbin 11 into a predetermined length. Therefore, the material strings 2 having different colors and patterns
By simply replacing the bobbin 11 around which a is wound, a plurality of types of string members 2 having different color patterns can be easily manufactured. In FIG. 3, 12 is the bobbin 11
A pair of first supply rollers for sandwiching, pulling out and feeding the long material string 2a from the pair, a pair of second supply rollers 13 for sandwiching and feeding the longer material string 2a on the downstream side of the first supply roller 12.
The supply roller 14 is a guide rail extending in the supply direction of the material string 2a. The first supply roller 12 is rotationally driven by the first drive motor 15, and the second supply roller 13 is rotationally driven by the second drive motor 16. First drive motor 1
Driving of No. 5 is controlled in accordance with signals from the pair of photoelectric sensors 17 and 18. The second drive motor 16 is a pulse motor, and intermittently rotates the second supply roller 13 at regular intervals. As a result, the second supply roller 13 supplies the material string 2a while temporarily stopping each time the material string 2a having a predetermined length is sent out. A slack is formed in the material string 2a between the first supply roller 12 and the second supply roller 13, and before the slack is lost, the first drive motor 15 is driven by the detection signal from the photoelectric sensor 17 located above. The first supply roller 12 is rotationally driven to continue moderate slack. Further, when this slack is excessively formed, the first drive motor 15 stops the rotational drive of the first supply roller 12 by the detection signal of the photoelectric sensor 18 below. As a result, the material string 2a is prevented from being stretched and is intermittently supplied at each correct length.

At a predetermined position of the guide rail 14, an adhesive application device 19 for applying the adhesive 7 (see FIG. 1) to the outer circumference of the material string 2a is provided. The adhesive applying device 19 includes a material string 2 a that moves along the guide rail 14.
When it stops, the pair of pinching members 20 for fixing the cord member 2 on the guide rails 14 and the material string 2a pinched and fixed by the pinching member 20 rotate around the adhesive agent. Nozzle 21 for evenly applying 7 is provided.
The nozzle 21 is brought into contact with the outer circumference of the material string 2a so that the nozzle 21
Pressing member 2 for evenly applying adhesive 7 by
1a is provided.

On the downstream side of the adhesive applying device 19 along the guide rail 14, when the material string 2a moving along the guide rail 14 stops, the position where the adhesive 7 of the material string 2a is applied. Is provided with a nozzle 22 for spraying a curing agent. As the adhesive 7 applied by the adhesive applying device 19, a cyanoacrylate adhesive was used as described above. Amines and the like are suitable as the curing agent, and in this example, the trade name "AA Setter" (manufactured by Toagosei Chemical Industry Co., Ltd.) was used.

As a result, the adhesive 7 is hardened at predetermined intervals on the material string 2a which moves along the guide rails 14, and the hardening portion 4 is formed at a predetermined position as shown in FIG. 4 (a). To be done. The curing portion 4 is cured by impregnating the fibers of the material string 2a with the adhesive 7. Then, by using amine as the curing agent, the adhesive 7 can be cured extremely quickly, and the adhesive 7 can be cured in a transparent state, so that the adhesive 7 can be cured in an inconspicuous appearance. The part 4 can be formed. Further, the adhesive 7 used at this time can adjust the range of impregnation into the fiber by its viscosity. In this embodiment, the viscosity of the adhesive 7 is set to 200 cps, and the adhesive 7 is impregnated within a range of about 2 mm in the longitudinal direction of the string member 2 to prevent further impregnation over a wide range.

Further, as shown in FIG. 3, the guide rail 1
A cutter 23 is provided at a downstream position along 4 to cut substantially the center of the hardened portion 4 of the material string 2a when the material string 2a moving along the guide rail 14 is stopped.

The cutter 23 forms the string member 2 separated from the material string 2a. The string member 2 is shown in FIG.
As shown in (b), the hardened portions 4 are provided at both ends thereof, and the end face 8 is formed flat by cutting with the cutter 23. As mentioned above, the size of the hardened part 4 before cutting is about 2 mm.
Therefore, the size of the hardened part 4 after cutting is about 1 mm.
And is formed in a size that is almost inconspicuous.

In this way, the manufacturing apparatus 10 shown in FIG.
As shown in FIG. 5A, the cord member 2 having a predetermined length discharged from the cord member 2 is formed by the joining jig 24 by the cord member 2 having another color pattern formed in the same manner as described above. To be joined. The joining jig 24 is a fluororesin block that can be divided into upper and lower parts, and a positioning hole 25 that penetrates the divided position.
It has. In the joining step, first, as shown in FIG. 5B, both flat end surfaces 8 formed on the hardened portion 4 of the string member 2 are joined.
Adhesive 9 is applied to, and the hardened portion 4 is inserted into the positioning hole 25 of the joining jig 24. As a result, as shown in FIG. 5C, the end faces 8 in the positioning hole 25 are abutted and adhered in a state where they are exactly aligned with each other. The adhesive 9 used at this time is
The same quality as the adhesive 7 used in the adhesive applying device 19 is used to obtain the affinity of both adhesives 7 and 9. Further, the adhesive 9 has a viscosity of 100 cps to slightly delay the curing speed, and the surface of the adhesive 7 already cured in the curing portion 4 is dissolved by the solvent of the adhesive 9 to realize an integral adhesion. ing. Then, when the end faces 8 are bonded to each other to form the joint portion 3, the joining jig 24 is divided into upper and lower parts and the cord body 1 is removed, as shown in FIG. 5A.
Thereby, as shown in FIG. 2, it is possible to form the cord body 1 in which the joint strength of the joint portion 3 is strong. Further, by manufacturing as described above, the joint portion 3 can be formed in a state where the end fibers are not unraveled, and the finished cord body 1 in which the joint portion 3 cannot be discriminated in appearance can be obtained. .

According to the above method, the work of forming the joint portion 3 is extremely easy. Therefore, for example, as shown in FIG. 6, even if the cord member 26a is formed flat, the adhesive 7 can be applied. The impregnated hardened portion 33 is formed and cut, and the cut end faces 27 are abutted and adhered to each other via the adhesive 9, thereby obtaining a cord body 26 having an excellent appearance in which the joint portion 28 cannot be discriminated in appearance. You can

Further, for example, as shown in FIG. 7, also in the case where a cord 29 is formed in a ring shape such as a hanging cord of an accessory or the like, the hardened portion cut by the above method is produced. By forming the cord member 30 including the cord member 31, flat cut end faces 32 can be formed at both ends of the cord member 30, and the cut end faces 32 at both ends of the cord member 30 can be formed.
By simply abutting each other through the adhesive 9 and adhering them together, a strongly joined portion 34 can be formed. Also at this time, since the fibers are prevented from unraveling by the curing portion 31, it is possible to easily manufacture the ring-shaped cord body 29 which is excellent in appearance and has no bulge in the joint portion 33. Further, although not shown, a plurality of cord members each having a different color pattern and having a hardened portion cut by the above method are arranged in a ring shape, and adjacent cut end surfaces are abutted to each other with an adhesive to bond them. Even so, the ring-shaped cord can be easily formed.

[0040]

As is apparent from the above, according to the present invention, the joining portion of the cord body is formed with a cord member having a cut end surface obtained by impregnating the material cord with an adhesive and curing the cord. Since it is formed by adhering each other later through the cut end face, there is no loosening of fibers at the end and no swelling is formed at the joint, so a structure of the joint part of the string body excellent in aesthetics is formed. Can be provided. Furthermore,
Since the joint portion is formed via the adhesive, it is possible to achieve a strong joint state without being limited by the material and shape of the cord body.

Further, since the joint portion is adhered via an adhesive agent of the same quality as the adhesive agent of the hardened portion, it is possible to obtain a high affinity for the adhesive agents when adhering the cut end faces of the hardened portion. Therefore, the bonded state of the bonded portion can be strengthened and a highly durable bonded structure can be provided.

Further, according to the joining method of the present invention, it is easy to form a hardened portion and cut the hardened portion to form flat end surfaces on both ends of the cord body, and The fibers will not come loose. Then, the cord bodies can be easily joined only by joining them through the flat cut end face formed at the end portion of the cord body.

When the hardened portion is formed, the hardened portion can be formed in a short time by impregnating the fibers of the cord with the adhesive and then applying the hardening accelerator, thereby improving the manufacturing efficiency. Can be made.

[Brief description of drawings]

FIG. 1 is an explanatory perspective view showing a cord body according to an embodiment of the present invention.

FIG. 2 is an explanatory view showing an enlarged main part of a cord body.

FIG. 3 is an explanatory diagram showing a schematic configuration of a string member manufacturing apparatus.

FIG. 4 is an explanatory view showing a manufacturing process by the apparatus of FIG.

FIG. 5 is an explanatory diagram showing a step that follows FIG.

FIG. 6 is an explanatory perspective view showing a cord body according to another embodiment.

FIG. 7 is an explanatory perspective view showing a cord body according to another embodiment.

[Explanation of symbols]

1, 26, 29 ... string body, 2, 26a, 30 ... string member,
3, 28, 32 ... Joined portion, 4, 31, 33 ... Hardened portion,
8, 27, 34 ... Cut end faces.

Claims (7)

[Claims] 1. A joining portion structure of a cord body having a joining portion in which end portions of which fiber cross-sections are exposed are joined, wherein a long material cord is cured by impregnating an adhesive at a predetermined position and curing the adhesive. Forming a portion, forming a flat cut end surface by cutting the cured portion to form a string member separated from the material string,
A hardened portion is formed by impregnating an adhesive at a predetermined position of another long material string and cured, and a flat cut end surface is formed by cutting the hardened portion and separated from the other material string. Another cord member is formed, and the cut end surface of the cord member and the cut end surface of the other cord member are abutted and adhered to each other to form the joint portion. . 2. A joining portion structure of a cord body comprising a joining portion in which end portions of which fiber cross sections are exposed are joined together, wherein a pair of long material cords is impregnated with an adhesive at a predetermined position and cured. By forming the above-mentioned hardened part and cutting the hardened part to form flat cut end faces on both ends to form a string member separated from the material string, both cut end faces of the string member are projected from each other. A joint portion structure of a string body, characterized in that the joint portion is formed by applying and bonding. 3. The cord body according to claim 1, wherein the joint portion is formed by adhering the cut end surfaces of the cured portion to each other via an adhesive having the same quality as the adhesive of the cured portion. Joint structure. 4. A joining method for joining end portions of a string body having exposed fiber cross-sections, wherein a step of forming a hardened part by impregnating and hardening an adhesive at a predetermined position of a long material string. A step of cutting the material string at the curing part to form a string member having a cut end surface, and a step of forming a cured part obtained by impregnating and hardening an adhesive at a predetermined position of another long material string. And a step of cutting the other material string at the curing part to form another string member having a cutting end face, and bonding the cutting end face of the string member and the cutting end face of the other string member to the curing part. And a step of adhering the same through an adhesive having the same quality as the agent. 5. A joining method for joining end portions of a string body where fiber cross sections are exposed to each other, wherein a step of forming a hardened part by impregnating and hardening an adhesive at a predetermined position of a long material string. , A step of cutting the material string at the curing part to form a string member having cutting end faces at both ends, and cutting end faces of both ends of the member through an adhesive of the same quality as the adhesive of the curing part. And a step of adhering the cords. 6. A joining method for joining end portions of a string body where fiber cross sections are exposed to each other, wherein a step of forming a hardened part by impregnating and hardening an adhesive at a predetermined position of a long material string. A step of cutting the material string at the curing part to form a string member having cut end faces at both ends, and forming a cured part obtained by impregnating an adhesive at a predetermined position of another long material string and curing the same. And a step of cutting the other material string at the curing portion to form another string member having cut end faces at both ends,
A string body, comprising: arranging the string member and another string member in a ring shape, and adhering adjacent cut end surfaces to each other via an adhesive of the same quality as the adhesive of the curing section. How to join. 7. The step of forming the cured portion, wherein the cord body is impregnated with an adhesive and then a curing accelerator is applied to cure the adhesive. The method for joining the cords according to.