JP2013093977A - Order wire for wire insertion - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an order wire for inserting wires such as an electrical wire and a communication cable, having superior wire insertion property and visibility compared to the conventional one while keeping sufficient strength and durability.SOLUTION: An order wire 1 for wire insertion, which is used upon wiring a linear object in a pipe, comprises: a colored part 3 having different color tone from a base material part 2 and formed in at least part of a peripheral longitudinal direction of a modified cross-section synthetic resin monofilament solid wire; and spiral recesses/protrusions 5 and a stripe pattern 6 which are formed on the monofilament peripheral surface by twisting the modified cross-section synthetic resin monofilament solid wire in the longitudinal direction.

Description

  TECHNICAL FIELD The present invention relates to an improvement of a call line for use in wiring a linear object in a pipe, and more particularly to a call line having a good balance between lineability and visibility.

  In general, in wiring work in offices, shops, houses, factories, etc., a method of passing linear objects such as electrical wiring and communication cables into pre-laid pipes when the interior construction of the building is completed is adopted. Specifically, first, a lead wire called a lead wire is passed through a pre-laid pipe, electric wiring and communication cables are connected to one end side of the lead wire, and then the other end of the lead wire is connected. By pulling it out of the pipe from the side, a desired linear object is wired in the pipe.

  Conventionally, steel lead wires have been mainly used in these wiring work, but steel lead wires are heavy, stiff and difficult to handle, and have electrical conductivity. There was a risk of electric shock during wiring work.

  Therefore, in recent years, instead of steel lead wires, lead wires using lightweight and insulative plastic as a material have attracted attention. For example, a plurality of synthetic resin monofilaments are twisted and heated while twisting. A lead wire (for example, see Patent Document 1) in which a spiral twill is formed on the outer surface has been proposed.

  This lead wire has the characteristics of having the same strength as the conventional steel lead wire without worrying about electric shock during wiring work, but because the outer diameter tends to be thick, it can be smoothly inserted into the piping. There were problems such as difficulty in connecting and poor usability, and further improvements were needed.

  In addition, a lead wire (for example, see Patent Document 2) is proposed in which a synthetic resin monofilament having a polygonal cross section is twisted and rotated to form a spiral twill on the outer surface. Since this lead wire can obtain the same strength with a small diameter as compared with the lead wire described in Patent Document 1, the lead-through property is improved. Due to the structure in which the cross-section monofilament is twisted, the appearance is monochromatic, and there is a problem that it is difficult to visually recognize when the background is an approximate color.

Japanese Utility Model Publication No. 61-22424 Japanese Utility Model Publication No. 4-16566

  The present invention has been achieved as a result of examining the solution of the problems in the above-described prior art as an object.

  Accordingly, an object of the present invention is to provide a call line for wire having excellent balance of wire lineability and visibility.

  In order to achieve the above object, according to the present invention, there is provided a nominal line used when wiring a linear object in a pipe, and at least part of the outer peripheral longitudinal direction of the deformed section synthetic resin monofilament single wire. It is characterized by forming a colored portion having a color tone different from that of the material portion, and forming spiral irregularities and striped patterns on the outer peripheral surface of the monofilament by imparting twist processing in the longitudinal direction of the monofilament monofilament monofilament. A call line is provided.

In the call line of the present invention,
The colored portion of the modified cross-section synthetic resin monofilament is made of the same resin having a different color tone from the base material portion, and the colored portion and the base material portion are joined by composite spinning,
In the cross section of the irregular cross-section synthetic resin monofilament, the proportion of the colored portion is 10 to 90%,
The number of twists of the modified cross-section synthetic resin monofilament is 20 to 60 turns / m,
The circumscribed circle diameter of the modified cross-section synthetic resin monofilament is 2.5 to 7.5 mm,
Are mentioned as more preferable conditions.

  ADVANTAGE OF THE INVENTION According to this invention, it has a spiral unevenness | corrugation and a striped pattern, although it is a single wire structure, and can obtain the call line for wiring which was excellent in the balance of line-wire-lineability and visibility.

Sectional drawing in 1st Example of the call line for communication of this invention. Sectional drawing in 2nd Example of the call wire for through-lines of this invention. The side view of FIG. Explanatory drawing of piping used in order to evaluate a lineability in an Example.

  Hereinafter, the present invention will be described in more detail with reference to the drawings.

  As shown in FIGS. 1 to 3, the call line for communication according to the present invention is a call line 1 for use when wiring a linear object in a pipe, and is formed on at least a part of the outer peripheral longitudinal direction. It is characterized in that spiral irregularities 5 and striped patterns 6 are formed on the outer peripheral surface by imparting a twisting process in the longitudinal direction of the deformed cross-section synthetic resin monofilament in which the colored portion 3 having a different color tone from the portion 2 is formed. To do.

  Here, the modified cross-section synthetic resin monofilament forming the through-line nominal line shown in FIG. 1 is a substantially triangular cross-section thread, and the modified cross-section synthetic resin monofilament forming the through-line nominal line shown in FIG. This is a cross-sectional yarn.

In these modified cross-section synthetic resin monofilaments, in the cross section, a base material portion 2 and a coloring portion 3 having a different color tone are formed, and the coloring portion 3 and the base material portion 2 are formed by composite spinning. It is preferable that it is joined by.

  Thus, in the nominal line 1 for wiring of the present invention, the twisted processing is applied to the monofilament monofilament single line, so that the helical surface 5 and the striped pattern 6 are provided on the outer peripheral surface, so that the wiring performance is lowered. In addition, since the color tone of the base material portion 2 and the coloring portion 3 is different, the property of excellent visibility is exhibited.

  In addition, the cross-sectional shape of the irregular cross-section synthetic resin monofilament that constitutes the nominal wire 1 for the line of the present invention is not particularly limited as long as it is not a perfect circle, and is a polygon such as an ellipse, a triangle, a quadrangle, a pentagon, a star, An irregular cross-sectional shape such as a multilobal shape can be mentioned, and among them, the substantially triangular cross-section shown in FIG. 1 is particularly preferable because of good lineability and strength.

  In addition, the number of twists of the deformed cross-section synthetic resin monofilament can be appropriately selected according to the purpose of use of the nominal wire 1 for wiring, and is not particularly limited, but the contact with the wall surface in the pipe is from point contact to point contact. Therefore, it is preferably 20 to 60 turns / m, and more preferably 30 to 50 turns / m, because the frictional resistance tends to be reduced and the lineability tends to be improved.

  Here, there is no restriction | limiting in particular about the material which comprises the nominal line 1 for wiring of this invention, For example, polyolefins, such as polyethylene and a polypropylene, polyvinyl chloride, polyvinylidene chloride, 6 nylon, 66 nylon, 610 nylon, 612 Nylon, polyamide resins such as 6/66 copolymer or copolymers thereof, polyethylene terephthalate (hereinafter referred to as PET), polybutylene terephthalate, polyethylene naphthalate, polyesters such as polycyclohexanedimethylene terephthalate or polymers thereof, polyfluoride Fluorine resins such as vinylidene, ethylenetetrafluoroethylene copolymer, tetrafluoroethylene / hexafluoropropylene / vinylidene fluoride copolymer, polycarbonates, polyphenylene sulfide, polymer Sulfone, acrylate polymer, polyetherimide, polyethersulfone, polyether ether ketone, polyamideimide, polyimide, polyallyl ether nitrile, a liquid crystal polyester.

  Among these resins, it is particularly preferable to use PET because of good lineability and strength.

  Moreover, it is preferable that the preform | base_material part 2 and the coloring part 3 in the cross section of the unusual cross-section synthetic resin monofilament which comprises the nominal line 1 for wiring of this invention are joined by the composite spinning using the same resin. If the colored portion 3 is formed by painting and is present only on the surface of the call line 1 for wiring, the colored portion 3 tends to drop off during repeated use, which is not preferable. When different types of resins are used for the coloring portion 3 and the coloring portion 3, the base material portion 2 and the coloring portion 3 are easily peeled off, which is not preferable.

  In the cross section cut perpendicularly to the length direction, the ratio of the cross-sectional area of the base material portion 2 to the cross-sectional area of the coloring portion 3 is 10:90 to 90: It is preferably in the range of 10, more preferably in the range of 20:80 to 80:20.

  This is because if the ratio of the colored portion 3 falls below the above range, sufficient visibility becomes difficult to obtain, and if the ratio of the colored portion 3 exceeds the above range, the base material portion 2 becomes too small. On the contrary, it is difficult to obtain sufficient visibility.

  In general, the diameter of the circumscribed circle 4 of the call wire 1 of the present invention is preferably about 10 to 40% of the pipe diameter, but in recent years the pipe diameter tends to be smaller, The line also needs to be thin.

  However, if the wire is too thin, not only will the bending hardness of the wire be reduced, but it will also be difficult to transmit the force when pushing the wire into the pipe, making it difficult to pass through the wire. Since it becomes hard, it may be difficult to wire through the corners of the piping.

  Therefore, it is preferable that the diameter of the circumscribed circle 4 of the call wire 1 of the present invention is in the range of 2.5 to 7.0 mm, and more preferably in the range of 3.2 to 6.0 mm. preferable.

  In addition, when passing the call wire for the wire through the pipe laid in advance and connecting the electrical wiring and communication cables to the terminal of this call wire, when pulling the call wire out of the pipe, the call wire is large. Since tension is applied, it is preferable that the nominal wire has a strength that can withstand this tension.

  Next, an example of the manufacturing method of the call wire 1 of the present invention will be described.

  First, two extruder types each of a mixture of a PET pellet used for the base material part and a PBT masterbatch containing a black pigment, and a mixture of a PET pellet used for the coloring part and a PBT masterbatch containing a yellow pigment are used. It is subjected to a composite spinning machine, melted and kneaded at a temperature of 280 ° C., and then extruded from a deformed composite die hole at a desired composite weight ratio. Then, after the extruded undrawn yarn is cooled and solidified at 60 to 90 ° C. while the surface of the cooling water tank is shaken, it is 4.0 to 8.5 times 1 at a heat medium temperature higher than the glass transition of the synthetic resin composition. First, a deformed cross-section composite synthetic resin monofilament is obtained by stretching in steps or two and then subjecting to a relaxation or constant length heat treatment of 0.85 to 1.0 times.

  The deformed cross-section composite synthetic resin monofilament thus obtained is subjected to S-twisting or Z-twisting at a temperature equal to or higher than the glass transition point of the synthetic resin, that is, the twisting process is performed to obtain the nominal wire 1 for the present invention. Can do.

  The call wire 1 of the present invention thus obtained is a conventional one while maintaining sufficient strength and durability when a wire such as an electric wiring or communication cable is passed through a pipe. Therefore, its practicality is extremely high.

  Hereinafter, although the call line for a through wire of the present invention will be described in more detail based on examples, the present invention is not limited to the following examples unless it exceeds the gist thereof.

  In the examples, “%” and “parts” mean “% by weight” and “parts by weight” unless otherwise specified.

In addition, the various characteristic values of the call line for wiring are measured according to the following method.
[Area ratio of base material and coloring part]
A cross-sectional observation sample obtained by cutting the nominal line in a direction perpendicular to the length direction is observed with a digital microscope VHX-100F manufactured by KEYENCE, and the cross-sectional area and coloring of the base material are measured using the area measurement tool of this digital microscope. The cross-sectional area of the part was measured, and the area ratio was determined as a percentage.
[Visibility]
The call line was cut to 15 cm, placed on a piece of concrete and plywood, which was actually checked from 10 m ahead at a luminous intensity of 50 lux, and judged according to the following criteria.

    ○: Visible enough in both situations.

X: It was not possible to see clearly in either one of the situations.
[Connection test]
Piping (commercially available) having an inner diameter of 22.2 mm was formed as shown in FIG. 4, and the callability of the call wire when the call wire was passed from A to B was evaluated in the following three stages. In addition, the time required for passing through the nominal line from A to B was also measured.

○: From A to B, it was possible to pass smoothly without being caught on the way,
△: It was possible to pass smoothly through more than half from A to B, but after that there was a place where it was caught on the way.
X: It was caught in the place which does not go to half from A to B.

  In addition, the piping in each corner used the elbow for electric piping (commercial item), and the length of each linear part af was as follows.

a: 1.0 m
b: 1.0 m
c: 3.7 m
d: 11.0m
e: 3.7 m
f: 5.0m
[Example 1]
Mixture of 99% by weight of PET chip (T701T manufactured by Toray Industries, Inc.) with IV of 1.18 as a base material part and 1% by weight of PBT masterbatch containing black pigment (PESM4800 manufactured by Dainichi Seika Kogyo Co., Ltd.) As a composite spinning having a mixture of 95% by weight of PET chip (T701T manufactured by Toray Industries, Inc.) and 5% by weight of PBT masterbatch (PESM 21136 manufactured by Dainichi Seika Kogyo Co., Ltd.) containing a yellow pigment, each having two extruders After being supplied to the machine and melt-kneaded, the melt composite spinning was performed at a temperature of 280 ° C., and the cross-sectional shape was extruded from the deformed composite die hole.

  Thereafter, the spun melt was cooled and solidified in a 70 ° C. hot water bath to become undrawn yarn. This undrawn yarn was continuously drawn to a total of 5.25 times, and further subjected to heat setting to form a base material portion: An irregular cross-section composite synthetic resin monofilament having an area ratio of the colored portion of 70:30 was obtained.

Next, the deformed cross-section composite synthetic resin monofilament was twisted to 34 turns / m in the Z twist, and then heat-set in a dry heat bath to obtain a nominal line having a circumscribed circle diameter of 3.5 mm.
[Example 2]
A nominal line was obtained under the same conditions as in Example 1 except that the cross-sectional ratio of the base material portion and the coloring portion was changed as shown in Table 1.
[Example 3]
A nominal line was obtained under the same conditions as in Example 1 except that the cross-sectional shape was changed to that shown in FIG.
[Example 4]
A nominal line was obtained under the same conditions as in Example 1 except that the circumscribed circle diameter of the nominal line was changed to 5.2 mm.
[Comparative Example 1]
A calling line was obtained under the same conditions as in Example 1 except that the coloring portion was not provided and a black calling line was used.
[Comparative Example 2]
A calling line was obtained under the same conditions as in Example 1 except that no coloring portion was provided and a yellow calling line was used.
[Comparative Example 3]
Two black synthetic resin monofilaments with a diameter of 2.4 mm and one yellow synthetic resin monofilament with a diameter of 2.4 mm are aligned, twisted in a Z twist at 34 turns / m, and then heat-set in a dry heat bath. A nominal wire was obtained under the same conditions as in Example 1 except that a nominal wire having a circumscribed circle diameter of 6.4 mm was manufactured.

  As described above, Table 1 shows the evaluation results of the visibility and the lineability of the call lines obtained in Examples 1 to 4 and Comparative Examples 1 to 3.

  As is clear from the results in Table 1, the call lines (Examples 1 to 4) of the present invention showed good results for visibility and good lineability.

  On the other hand, the call line for connection that does not satisfy the conditions of the present invention (Comparative Examples 1 and 2) tends to be a call line with poor visibility, and a call line for connection (a plurality of synthetic resins twisted together) Comparative Example 3) tends to be a nominal line with poor lineability.

  The nominal wire for wiring of the present invention maintains sufficient strength and durability, and has excellent balance of lineability and visibility. Therefore, when wiring electrical wiring and communication cables in piping, You can work efficiently.

  In addition, the connecting wire of the present invention can be used by adhering, fusing or crimping an electrical connection terminal to the terminal as required, and for applications other than the calling wire, such as a pull cord. Can also be used.

DESCRIPTION OF SYMBOLS 1 Calling line 2 Base material part 3 Colored part 4 circumscribed circle 5 Spiral unevenness 6 Striped pattern

Claims (5)

This is a nominal line used when wiring a linear object in a pipe, and a colored portion having a color tone different from that of the base material portion is formed on at least a part of the outer peripheral longitudinal direction of the deformed cross-section synthetic resin monofilament single wire. A nominal line for wiring, which is formed by forming a spiral irregularity and a striped pattern on the outer peripheral surface of the monofilament by imparting a twisting process in the longitudinal direction of the cross-section synthetic resin monofilament single wire. 2. The colored portion of the modified cross-section synthetic resin monofilament is made of the same resin having a different color tone from the base material portion, and the colored portion and the base material portion are joined by composite spinning. Nominal wire for communication as described in. 3. The through-wire nominal line according to claim 1, wherein a ratio of the colored portion is 10 to 90% in a cross section of the deformed cross-section synthetic resin monofilament. The through-wire nominal line according to any one of claims 1 to 3, wherein the number of twists of the deformed cross-section synthetic resin monofilament is 20 to 60 turns / m. 5. The through-wire nominal line according to claim 1, wherein a circumscribed circle diameter of the modified cross-section synthetic resin monofilament is 2.5 to 7.5 mm.

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