JP6593037B2 - High heat resistance cable - Google Patents

Description

  The present invention relates to a high heat resistance cable.

  As a cable having high heat resistance, a cable in which an electric wire is covered with a sheath made of fluororesin, fluororubber or the like is generally used (for example, see Patent Document 1).

  The high heat resistance cable described in Patent Document 1 includes an electric wire in which a central conductor is covered with a fluororesin, for example, an insulator made of fluorinated PFA, and a fluororesin provided on the outer periphery of the electric wire via a shield layer, For example, it is provided with a jacket made of PFA (melting point: 300 to 310 ° C.).

JP 2007-188782 A

  However, the fluororesin that forms the outer sheath of conventional high-heat-resistant cables is a material that contains halogen, so it generates a large amount of toxic and harmful gases during disposal and combustion, and generates extremely toxic dioxins depending on the incineration conditions. Let For this reason, cables using a halogen-free resin material that does not contain halogen as a covering material are widely used from the viewpoint of safety in the event of a fire and reduction of environmental load.

  In some cases, it is necessary to pass the high heat-resistant cable through a high temperature region that is narrower than the cable outer diameter. Further, the high heat resistance cable may be used in a portion where the cable is repeatedly bent.

  Accordingly, an object of the present invention is to provide a high heat resistance cable that is narrower than the outer diameter of the cable and that allows the cable to pass through a high temperature region.

[1] An insulated wire having an outer periphery covered with an insulator,
A sheath provided on the outer periphery of the insulated wire,
The conductor is connected to a temperature sensor;
A high heat resistance cable with a temperature sensor used through a wiring passage which is a high temperature region formed in the wiring passage portion,
The insulator is formed from a polyetheretherketone containing no halogen,
The sheath is formed from a flame retardant olefin resin that does not contain halogen ,
The insulated wire is exposed from the sheath;
A highly heat-resistant cable with a temperature sensor, wherein the exposed insulated wire is used through the wiring passage so as to be positioned in the wiring passage which is a high temperature region formed in the wiring passage portion.
[2] The insulator has a thickness of 0.2 to 0.3 mm,
The sheath is a high heat-resistant cable with a temperature sensor according to [1], having a thickness of 0.3 to 0.5 mm.
[3] The highly heat-resistant cable with a temperature sensor according to [1] or [2], wherein the insulated wire is a plurality of insulated wires having 2 to 4 cores.
[4] The high- temperature- resistant cable with a temperature sensor according to [3], wherein the plurality of insulated wires are formed by twisting and a twisting pitch is 30 to 35 mm.

  According to the present invention, it is possible to pass a cable through a high temperature region that is narrower than the outer diameter of the cable.

FIG. 1 is a cross-sectional view of a high heat resistance cable according to an embodiment of the present invention. FIG. 2 is a diagram illustrating an example of a usage state of the high heat resistance cable illustrated in FIG. 1.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, in each figure, about the component which has the substantially same function, the same code | symbol is attached | subjected and the duplicate description is abbreviate | omitted.

[Embodiment]
FIG. 1 is a cross-sectional view of a high heat resistance cable according to an embodiment of the present invention.

  This high heat resistance cable 1 includes an insulated wire 4 in which an outer periphery of a conductor 2 is covered with an insulator 3, a pressing tape 6 wound around an insulating wire 4 with inclusions 5 interposed therebetween, and an outer periphery of the pressing tape 6. And a sheath 8 provided on the outer periphery of the shield layer 7.

(Insulated wire)
The number of the insulated wires 4 is three in the case shown in FIG. 1, but may be one, two, four or more. When two or more insulated wires 4 are used, they are twisted together. The insulated wire 4 transmits a voltage or a signal. For example, the three insulated wires 4 may be used to connect to a temperature sensor such as a three-terminal CMOS temperature sensor. Further, a three-phase or two-phase AC voltage may be transmitted from the inverter to the motor using three or two insulated wires 4. Further, as the insulated wire 4, one set or two or more sets of twisted pair wires for transmitting a differential signal may be used.

  As the conductor 2, for example, a copper conductor surface made of copper is used. As the plating, silver plating having higher heat resistance than tin plating is preferable.

  The insulator 3 is made of a non-halogen resin material that has higher heat resistance than the sheath 8 and does not contain halogen. As such a non-halogen resin material, for example, polyether ether ketone (PEEK) (melting point: 343 ° C.) can be used. In addition, the thickness of the insulator 3 is preferably 0.2 to 0.3 mm from the viewpoint of reducing the diameter and weight.

  In consideration of high flexibility and terminal workability, the twisting pitch of the plurality of insulated wires 4 is preferably 30 to 35 mm. The reason why the twisting pitch is set to 30 mm or more is that if it is less than 30 mm, the terminal workability is deteriorated. The reason why the twisting pitch is set to 35 mm or less is that if it exceeds 35 mm, the flexibility becomes worse.

(sheath)
The sheath 8 is made of a non-halogen resin material having a heat resistance with a melting point of 100 ° C. or higher and containing no halogen. As such a non-halogen resin material, for example, a flame-retardant olefin resin (melting point: 120 ° C.) can be used. As the flame-retardant olefin-based resin, for example, a resin in which 150 to 200 parts by weight of magnesium hydroxide is added to 100 parts by weight of EVA (ethylene / vinyl acetate copolymer resin) to increase the flame retardancy is used. The thickness of the sheath 8 is preferably 0.3 to 0.5 mm from the viewpoint of reducing the diameter and weight. The resin material constituting the sheath 8 may have the melting point equivalent to that of the insulator 3 of the insulated wire 4.

(Other configurations)
As the inclusion 5, for example, a general material such as glass fiber can be used. For the pressing tape 6, for example, a resin tape made of polyester or the like is used. The shield layer 7 is formed, for example, by braiding a conducting wire and connected to the ground. The shield layer 7 may be one in which a tape with a conductor is wound.

  FIG. 2 is a diagram illustrating an example of a usage state of the high heat resistance cable 1 illustrated in FIG. 1. A wiring route 10a formed in the wiring passage portion 10 is provided in the wiring route on the terminal portion side of the high heat resistance cable 1 as shown in FIG. The wiring passage 10a is a place narrower than the outer diameter of the cable and is a high temperature region (for example, 170 ° C.). That is, the inner diameter d of the wiring passage 10 a is formed smaller than the outer diameter D of the high heat resistant cable 1. For this reason, in order to pass the high heat resistance cable 1 through the wiring passage 10a, it is necessary to peel off the sheath 8 and the like.

  First, a stepping process is performed on one end side of the high heat resistance cable 1 to remove the sheath 8, the shield layer 7, the pressing tape 6 and the inclusion 5, and the insulated wire 4 is exposed, for example, 50 to 100 cm.

  Next, the exposed insulated wire 4 is passed through the wiring passage 10 a formed in the wiring passage portion 10. The conductor 2 is exposed from the electric wire 4, and the conductor 2 is connected to the three terminals 11 a of the temperature sensor 11 by the connecting member 12.

(Operation and effect of the present embodiment)
According to the present embodiment, the following operations and effects are achieved.
(1) Even in a place that is narrower than the outer diameter of the cable, the insulating wiring 4 can be passed through the place by peeling off the sheath 8 and exposing the insulating wiring 4.
(2) Even if the place narrower than the outer diameter of the cable is a high temperature region, the exposed insulator 3 of the insulated wiring 4 is formed of a high heat resistant material, so the high heat resistant cable 1 is used. can do.
(3) Since the high heat resistance cable 1 has bending resistance, it can be used for a portion that is repeatedly bent.

The embodiments of the present invention are not limited to the above-described embodiments, and various embodiments are possible. In the above embodiment, the case where the high heat resistant cable 1 is narrower than the cable outer diameter and passed through the high temperature region has been described. You may apply when passing through.

  Further, it is possible to omit or change some of the constituent elements of the above-described embodiment within a range not changing the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 ... High heat resistant cable, 2 ... Conductor, 3 ... Insulator, 4 ... Insulated electric wire, 5 ... Inclusion,
6 ... pressing tape, 7 ... shield layer, 8 ... sheath, 10 ... wiring passage part,
DESCRIPTION OF SYMBOLS 10a ... Wiring path, 11 ... Temperature sensor, 11a ... Terminal, 12 ... Connection member

Claims (4)

An insulated wire whose outer periphery is covered with an insulator,
A sheath provided on the outer periphery of the insulated wire,
The conductor is connected to a temperature sensor;
A high heat resistance cable with a temperature sensor used through a wiring passage which is a high temperature region formed in the wiring passage portion,
The insulator is formed from a polyether ether ketone containing no halogen,
The sheath is formed from a flame retardant olefin resin that does not contain halogen ,
The inner diameter of the wiring passage is smaller than the outer diameter of the high heat resistance cable with the temperature sensor,
The insulated wire is exposed from the sheath;
A highly heat-resistant cable with a temperature sensor, wherein the exposed insulated wire is passed through the wiring passage and the exposed insulated wire is positioned in the wiring passage. The insulator has a thickness of 0.2 to 0.3 mm;
The sheath has a thickness of 0.3 to 0.5 mm;
The high heat-resistant cable with a temperature sensor according to claim 1. The insulated wire is a plurality of insulated wires having 2 cores to 4 cores,
The high heat-resistant cable with a temperature sensor according to claim 1 or 2. The plurality of insulated wires are formed by twisting together, and the twisting pitch is 30 to 35 mm.
The high heat-resistant cable with a temperature sensor according to claim 3.

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