JP2003109439A - Utp cable wrapping type cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a UTP cable wrapping type cable capable of satisfying attenuation characteristics of a UTP cable in a category 5 in the inside layers and the outside layers of a plurality of layers, and capable of reducing manhours for designing and wiring. SOLUTION: This UTP wrapping type cable 11 is structured by providing a supporting wire 12 and a plurality of UTP cables 13-15 in a category 5. The layer of the cable 13 is provided around the supporting wire 12 with the wire as center, the layer of the UTP cable 14 is then provided around it, and furthermore, the layer of the UTP cable 15 is provided around that to form the UTP cable wrapping type cable 11. In addition, the conductor diameter A and the insulation diameter B in the UTP cable 13-15 of each layer are enlarged as it goes toward the outside layer from the inside layer.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a category 5 UTP (Unshield) around a support line.
ed Twisted-Pair: unshielded twisted pair cable) A UTP cable winding type cable having a plurality of cable layers.

[0002]

2. Description of the Related Art LAN (Local Area Net)
For the wiring of the work, a UTP cable, which is standardized by the Electronic Industries Association / Telecommunications Industry Association (EIA / TIA) -568A and has no shield interposed between the pair, is used. It is generally known that the UTP cable has a structure in which two insulated copper wires are twisted into a pair, and four pairs are put together in an outer cover. UTP cables are classified into multiple types, but category 5 used for LAN wiring.
The UTP cable can be used up to 100 MHz. In addition, the wiring distance is set to 100 m at maximum.

In recent years, for example, a UTP cable winding type cable 1 as shown in FIG. 4 has been used for a trunk line of an apartment or a building. The UTP cable winding type cable 1 includes a supporting wire 2 and a plurality of category 5 cables.
And UTP cable 3 of. Also,
The UTP cable winding type cable 1 has a structure in which a plurality of layers of the UTP cable 3 are provided around the support wire 2 as a center.

The conductor of the UTP cable 3 is 24 AW
G (US conductor size: equivalent to about 0.511 mm) is generally used, and an insulation outer diameter of 0.90 mm to 0.92 mm is generally used.

[0005]

By the way, in the above-mentioned prior art, since the UTP cable 3 is wound around the support wire 2, the length of the UTP cable 3 alone becomes longer than that of the UTP cable winding type cable 1. However, the following problems have occurred.

That is, the twisting ratio changes because the collective twist pitch and the layer core diameter differ in each layer of the UTP cable 3, and the length of the UTP cable 3 alone differs in each layer, that is, the support wire 2 Even if the length of the UTP cable 3 alone is within 100 m in the nearest first layer, the length of the UTP cable 3 alone exceeds 100 m in the second layer, which causes attenuation in the wiring of the second layer. The system may not operate due to specification violation.

Further, for example, the length 100 m of the UTP cable winding type cable 1 corresponds to 105 m for the first layer in the UTP cable 3 alone and 110 m in the second layer. It is necessary to perform actual wiring, and it takes time to design and wire.

The present invention has been made in view of the above-mentioned circumstances, and is a UTP cable winding type cable capable of satisfying the attenuation characteristic of a category 5 UTP cable and reducing man-hours such as design and wiring. The challenge is to provide.

[0009]

The UTP cable winding type cable of the present invention as set forth in claim 1 made to solve the above-mentioned problems has a plurality of layers of category 5 UTP cables around the supporting wire. A UTP cable winding type cable provided with layers, characterized in that the conductor outer diameter and the insulation outer diameter of the UTP cable of each layer are increased from the inner layer to the outer layer.

A UTP cable winding type cable according to a second aspect of the present invention is the UTP cable winding type cable according to the first aspect, wherein the conductor outer diameter is 0.5.
mm to 0.6 mm, the insulation outer diameter is 0.9 mm to 1.0
The feature is that it is mm.

According to the present invention described in claim 1,
The outer diameter of the conductor and the outer diameter of the insulation are increased in order to reduce the attenuation amount of the UTP cable alone toward the outer layer.
As a result, the amount of attenuation due to the increase in the twisting ratio (the amount of attenuation in each layer of the UTP cable winding type cable) UP
Is suppressed and breakage of the attenuation standard is prevented. Also, it is possible to give a margin to the standard value of the attenuation,
The UTP cable winding type cable satisfies the attenuation characteristic of the UTP cable. On the other hand, in designing, wiring, etc., it is not necessary to care about the length of the UTP cable alone for each layer, and the number of steps for designing, wiring, etc. can be reduced.

According to the invention described in claim 2,
Conductor outer diameter 0.5mm-0.6mm, insulation outer diameter 0.9
When the thickness is set to mm to 1.0 mm, the attenuation characteristic of the UTP cable can be satisfied in consideration of the twisting ratio of each layer.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing an embodiment of a UTP cable winding type cable of the present invention.

In FIG. 1, reference numeral 11 indicates a UTP cable winding type cable used for a trunk line of a condominium or a building, for example. The UTP cable winding type cable 11 is configured to include a metal support wire 12 and a plurality of category 5 UTP cables 13 to 15. In addition, the UTP cable winding type cable 11 has a UT around the support wire 12 as a center.
The layer of the P cable 13 (hereinafter referred to as the first layer),
It has a structure in which a layer of the UTP cable 14 (hereinafter, referred to as a second layer) is further provided around it, and a layer of the UTP cable 15 (hereinafter, referred to as a third layer) is provided around the layer (three layers). Not limited).

The UTP cables 13 to 15 each include four twisted pair cores 17 and an outer cover 18 that covers the outsides of the four twisted pair cores 17. The twisted pair wire core 17 is formed by twisting a pair of insulating wire cores 21 in which a conductor 19 such as a copper wire is covered with an insulator 20 made of polyethylene. The outer cover 18 is formed of a material such as vinyl or polyethylene.

The UTP cable 14 in the second layer is
The conductor outer diameter A of the conductor 19 is formed larger than the conductor outer diameter A of the conductor 19 of the UTP cable 13 in the first layer. Also, the UTP cable 15 in the third layer
Means that the conductor outer diameter A of the conductor 19 is UT in the second layer.
It is formed larger than the conductor outer diameter A of the conductor 19 of the P cable 14. That is, the conductor outer diameter A of the UTP cable winding type cable 11 is formed so as to increase from the first layer to the third layer (from the inner layer to the outer layer).
The conductor outer diameter A is selected in the range of 0.50 mm to 0.60 mm in order to satisfy the attenuation characteristics of the UTP cables 13 to 15 in consideration of the twisting ratio (described later) of each layer.

The UTP cable 14 in the second layer is
The insulation outer diameter B of the insulator 20 is the UTP in the first layer.
It is formed to be larger than the insulation outer diameter B of the insulator 20 of the cable 13. Also, the UTP cable 1 in the third layer
5, the insulation outer diameter B of the insulator 20 is formed larger than the insulation outer diameter B of the insulator 20 of the UTP cable 14 in the second layer. That is, the insulation outer diameter B of the UTP cable winding type cable 11 is formed so as to increase from the first layer to the third layer (from the inner layer to the outer layer). The insulation outer diameter B is the twist ratio of each layer (described later).
In consideration of the above, in order to satisfy the attenuation amount characteristics of the UTP cables 13 to 15, it is selected between 0.90 mm and 1.00 mm.

In addition, the UTP cable winding type cable 11 is formed so that the collective twist pitch and the layer core diameter increase from the first layer to the third layer (from the inner layer to the outer layer). The UTP cable winding type cable 11 is formed such that the outer diameter C of the UTP cables 13 to 15 increases from the first layer to the third layer (inner layer to outer layer). On the other hand, the attenuation amount of the UTP cables 13 to 15 alone is set to decrease from the first layer to the third layer (inner layer to outer layer) at 100 MHz which is the highest frequency defined in Category 5. (U
The conductor outer diameter A and the insulation outer diameter B are increased from the first layer to the third layer in order to reduce the attenuation amount of the TP cables 13 to 15 alone). The characteristic impedance is 10
It is designed to be within the range of 0 ± 15Ω.

According to the above configuration, the category 5 UT
The UTP cable winding type cable is capable of satisfying the attenuation characteristics of the P cable and reducing the number of steps such as design and wiring.

[0020]

EXAMPLES Examples of the present invention will be described below with reference to FIG. 1 and Table 1. The UTP cable winding type cable 11 of the present embodiment has a layer of the UTP cable 13 serving as the first layer around the support wire 12 made of metal and a UTP cable 14 serving as the second layer around the support wire 12. Layer, and the UTP cable 1 that becomes the third layer around it.
The structure has five layers.

[0021]

[Table 1]

The conductor outer diameter A of the conductor 19 of the UTP cable 13 in the first layer is 0.51 mm, and the insulation outer diameter B of the insulator 20 is 0.91 mm. The conductor outer diameter A of the conductor 19 of the UTP cable 14 in the second layer is 0.
The insulating outer diameter B of the insulator 20 is 0.
It is 93 mm. The conductor outer diameter A of the conductor 19 of the UTP cable 15 in the third layer is 0.55 mm, and the insulation outer diameter B of the insulator 20 is 0.95 mm.

Further, the UTP cable 1 in the first layer
The outer diameter C of 3 is 5.5 mm, and UTP in the second layer
The outer diameter C of the cable 14 is 5.7 mm, and the outer diameter C of the UTP cable 15 in the third layer is 5.9 mm.
The outer diameter of the support wire 12 is the UTP cable 13 in the first layer.
It is 5.5 mm, which is the same as the outer diameter C of.

Further, the attenuation amount of the UTP cable 13 in the first layer by itself is 20.3 dB / 10 at 100 MHz which is the maximum frequency defined in Category 5.
It is 0m. The attenuation amount of the UTP cable 14 alone in the second layer is 19.7 dB / 100 m. The attenuation amount of the UTP cable 15 alone in the third layer is 19.1.
It is dB / 100 m.

Furthermore, the collective twist pitch of the UTP cable 13 in the first layer is 150 mm and the twist rate is 2.6%. The collective twist pitch of the UTP cable 14 in the second layer is 200 mm, and the twist rate is also 5.8%. UTP in the third layer
The collective twist pitch of the cable 15 is 250 mm, and the twist rate is 8.3%.

Here, the collective twist pitch and twist rate will be described. In FIG. 2, the collective twist pitch in the first layer refers to the pitch P when the UTP cable 13 is wound around the support wire 12, and the collective twist pitch in the second layer refers to the UTP cable 14 in the first layer. The pitch P at which the UTP cable 15 is wound on the second layer is referred to as the pitch P at which the UTP cable 15 is wound around the second layer.

In FIG. 3, the twisting rate means how much the actual length (x) per pitch of the strands or cores of the twisted and concentric strands is longer than the pitch (P). It is expressed as a percentage. The twisting rate (%) is the twisting rate (%) = {(x / P) -1} × 1
00 is calculated. In addition, (d) of FIG. 2 and FIG. 3 has shown the core diameter.

In Table 1, assuming that the length of the UTP cable winding type cable 11 of this embodiment is 100 m, the twisting ratio in the first layer is 2.6%. The length will be 102.6m. Moreover, since the twisting ratio in the second layer is 5.8%, the length of the UTP cable 14 is 105.8 m.
become. Furthermore, the twisting ratio in the third layer is 8.3%
Therefore, the length of the UTP cable 15 is 108.
It will be 3m.

In the UTP cable winding type cable 11 of the present embodiment as described above, the attenuation amount in the first layer (the attenuation amount in each layer of the UTP cable winding type cable) is 100 MHz which is the maximum frequency defined in Category 5. At 20.8 dB / 100 m (2
When the UTP cable 13 having an attenuation characteristic of 0.3 dB / 100 m is twisted at a twisting rate of 2.6%, the UTP cable winding type cable 11 is 20.3 × 100 m.
1.026 = 20.8 dB / 100 m). Also,
The amount of attenuation in the second layer is also 20.8B / 100m
(When the UTP cable 14 having an attenuation characteristic of 19.7 dB / 100 m is twisted at a twisting rate of 5.8%, the UTP
When the cable winding type cable 11 is 100 m, 19.
7 × 1.058 = 20.8 dB / 100 m). Furthermore, the amount of attenuation in the third layer is also 20.7B / 10
UT with 0m (19.1dB / 100m attenuation characteristics)
When the P cable 15 is twisted at a twisting rate of 8.3%, U
1 when the TP cable winding type cable 11 is 100 m
9.1 × 1.083 = 20.8 dB / 100 m).

Therefore, the UTP cable winding type cable 11 of the present embodiment has a maximum frequency of 22.0 dB / 10 at 100 MHz which is the maximum frequency defined in Category 5.
The characteristics of 0 m or less are satisfied with a margin in each layer.

The characteristic impedance of the first layer is 105.6Ω, the characteristic impedance of the second layer is 104.9Ω, and the characteristic impedance of the third layer is 104.2Ω. The UTP cable winding type cable 11 of the example has a characteristic impedance of 100 ± 15 defined in Category 5.
Satisfies Ω.

As described above, the amount of attenuation (U
It is possible to suppress the attenuation amount (UP) in each layer of the TP cable winding type cable and prevent the attenuation amount from breaking the standard. In addition, a margin can be provided for the standard value of the attenuation amount, and the attenuation amount characteristic of the UTP cable can be satisfied. On the other hand, in designing, wiring, etc., it is not necessary to care about the length of the UTP cable alone for each layer, and it is possible to reduce the number of steps in designing, wiring, etc.

In addition, it goes without saying that the present invention can be modified in various ways without departing from the spirit of the present invention.

[0034]

As described above, according to the present invention described in claim 1, it is possible to satisfy the attenuation characteristic of the category 5 UTP cable and reduce the man-hours for design, wiring and the like. A UTP cable winding type cable can be provided.

According to the present invention described in claim 2,
The attenuation characteristic of the UTP cable can be satisfied in consideration of the twisting ratio of each layer.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a UTP cable winding type cable according to the present invention.

FIG. 2 is an explanatory diagram of a twisting rate.

FIG. 3 is a development view of FIG. 2.

FIG. 4 is a sectional view of a conventional UTP cable winding type cable.

[Explanation of symbols] 11 UTP cable winding type cable 12 Support line 13-15 UTP cable 17 twisted cores 18 hull 19 conductor 20 insulator 21 Insulated wire core

Claims (2)

[Claims] 1. A UTP cable winding type cable in which a plurality of layers of a category 5 UTP cable are provided around a supporting wire around the supporting wire, and a conductor outer diameter of the UTP cable in each layer from an inner layer to an outer layer. Also, a UTP cable winding type cable having a large insulation outer diameter. 2. The UTP cable winding type cable according to claim 1, wherein the conductor outer diameter is 0.5 mm to 0.6 mm and the insulation outer diameter is 0.9 mm to 1.0 mm. UT
P cable winding type cable.