JP2009206023A - Cable adaptor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heater adaptor that is resistant to the entry of moisture into the interior of a sleeve or the like due to excellent air-tightness and water-tightness thereof and thereby maintains high reliability. <P>SOLUTION: In the heater adaptor, heater wires 1, 1 and terminals 4, 4 connected thereto are each housed in metal narrow tubular adaptors 11, 11, and inorganic insulating materials 12, 12 filled into the cases 11, 11 insulate the heater wires 1, 1 and terminals 4, 4 from the adaptor 11, 11, thus individual adaptor units 2, 2 being constituted, with lead wires 6, 6 for power source connection being connected to the terminals 4, 4. The adaptor portions 2, 2 are inserted into the sleeve 3, the ends of the adaptor portions 2, 2 are fitted into outlets 14, 14 of the sleeve 3, the cases 11, 11 of the adaptor portions 2, 2 are welded to the outlets 14, 14 of the sleeve 3, and then sealed by a sealing member 13. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  In the present invention, a heater wire led out from an end portion of a sheath of a sheath heater is connected to a terminal made of a rod-shaped conductor, and this connecting portion is covered with a metal exterior pipe via an insulating material, and this terminal is connected to a power source The present invention relates to a heater adapter for connecting a lead wire.

  The conventional adapter for both terminals of a heater includes a sheath heater in which a heater wire is covered with a sheath in an insulated state, a terminal made of a rod-like conductor connected to a heater wire led out from the end of the sheath heater, and the terminal and the heater wire A metal adapter that covers the outside of the connecting portion, an insulating material that is inserted between the adapter and the terminal and the heater wire, and an end portion that is fitted to the outside of the terminal and into which the adapter terminal is inserted. A sealing member fitted to seal the insulating material inside the adapter on the side, and an end side where the sheath heater of the adapter is inserted is fitted to seal the insulating material inside the adapter. And a sealing block.

  In such a conventional heater adapter part, an epoxy resin is used as a sealing member, and after filling the inside of the adapter with an insulating material such as MgO, the end part of the adapter is filled with an epoxy resin, and this is heated at 120 ° C. for 4 hours. It was cured over time to seal the end of the sleeve.

  In addition, the heater wire and the terminal were joined by fitting the heater wire drawn out from the end of the sheath into a hole formed in the end surface of the terminal and crimping from both sides in one direction before welding. Furthermore, the inside of the adapter was filled with a cylindrical block of MgO or magnesia (MgO) powder as an insulating material.

As described above, in the conventional heater adapter, epoxy resin is used as a sealing member. Even if temperature management and time management until curing are performed, moisture penetrates into the sleeve due to the surface area of the sealing member, and insulation properties are obtained. There has been a problem that reliability is liable to be lowered due to a decrease in the number of times.
JP 2003-142234 A JP 2003-142235 A

  In view of the problems in the conventional heater adapter as described above, the present invention provides a heater adapter in which moisture does not easily enter the adapter and can maintain high reliability over a long period in terms of insulation. For the purpose.

  In the present invention, in order to achieve the above object, the adapter wires 2 and 1 connected to the terminals 4 and 4 are accommodated in the adapters 11 and 11, respectively, and the adapter portions 2 and 2 are individually configured. The parts 2 and 2 are accommodated in the sleeve 3, fitted into the outlets 14 and 14 of the sleeve 3, the adapters 11 and 11 of the adapter parts 2 and 2 are welded to the outlets 14 and 14 of the sleeve 3, and the sealing material 13 Sealed.

  The heater adapter connects the metal rod-like terminals 4 and 4 to the heater wires 1 and 1, and stores the connecting portion between the heater wires 1 and 1 and the terminals 4 and 4 in the adapters 11 and 11, and the adapter 11 and 11. The heater wires 1, 1 and the terminals 4, 4 are insulated from the adapters 11, 11 by inorganic insulating materials 12, 12 filled in 11.

  In the heater adapter according to the present invention, the heater wires 1 and 1 and the terminals 4 and 4 connected to the heater wires 1 and 1 are accommodated in the metal thin tube adapters 11 and 11, respectively, and the inorganic insulating materials 12 and 12 filled in the cases 11 and 11, respectively. The heater wires 1, 1 and the terminals 4, 4 are insulated from the adapters 11, 11 to form individual adapters 2, 2, and the adapters 2, 2 are inserted into the sleeve 3. 2 are fitted into the outlets 14, 14 of the sleeve 3, and the cases 11, 11 of the adapters 2, 2 are welded to the outlets 14, 14 of the sleeve 3, and then sealed with a sealing material 13.

  In such a heater adapter according to the present invention, the end portions of the adapter portions 2 and 2 which are insulated by accommodating the heater wires 1 and 1 and the terminals 4 and 4 connected thereto in the metal thin tube adapters 11 and 11 are sleeves 3. Since the seal member 13 is welded to the outlets 14 and 14 of the sleeve 3 and sealed with the seal member 13, the surface area of the seal member is small, and the intrusion of moisture can be reduced.

Moreover, in the conventional heater adapter part, compared to the structure of both terminals of the heater,
It is possible to provide a highly reliable heater adapter in which the area of the epoxy resin is 1/3 times or less, moisture is difficult to enter into the sleeve, and the insulation is less deteriorated.
However, although it is difficult for moisture to enter the sleeve, it is not absolute. Therefore, after heating to 200 ° C. or more and lowering to a minimum of 70 ° C., sealing is performed with the sealing material 13. When the temperature is set to 70 ° C. or lower, moisture enters.

  As described above, in the heater adapter unit 2 according to the present invention, the intrusion of moisture into the adapter 11 is reduced, and the insulation is not deteriorated by the moisture, and high reliability is obtained. Further, the sealing process is facilitated, and a heater adapter with easier quality control and process control can be obtained.

In the present invention, the heater wires 1, 1 connected to the terminals 4, 4 are accommodated in the adapters 11, 11, respectively, and the adapter parts 2, 2 are configured individually. The adapters 2 and 2 are fitted into the outlets 14 and 14 of the sleeve 3, the adapters 11 and 11 of the adapters 2 and 2 are welded to the outlets 14 and 14 of the sleeve 3, and then sealed with a sealing material 13. The above-mentioned purpose was achieved.
Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to examples.

FIG. 1 shows a heater adapter according to an embodiment of the present invention. The manufacturing process will be described with reference to FIG.
As shown in FIG. 2, the core wire of the heater is stripped from the heater wire 1 which is a sheathed heater, and a rod-like terminal 4 is connected to this. The connecting portion between the heater wire 1 and the terminal 4 is accommodated in a cylindrical adapter 11, one end of the adapter 11 is crimped to the sheath of the heater wire 1 by means of drawing or the like, and this portion is welded. And seal. Further, the case 11 is filled with an inorganic insulating material such as magnesia powder. By extending this in the longitudinal direction by swaging, the packing density of the insulating material filled in the case 11 is increased and the diameter is reduced. In this way, the adapter part 2 is comprised in the edge part of the heater wire 1, respectively.

  As shown in FIG. 3, after configuring the adapter parts 2 and 2 at both ends of the heater wires 1 and 1, the adapter parts 2 and 2 are inserted into the sleeve 3, and the outlets 14 and 14 of the sleeve 3 are inserted. The adapters 2, 2 are fitted into 14, and the cases 11, 11 are welded to the outlets 14, 14 of the sleeve 3 and then sealed with a sealing material 13. Joints 5 and 5 such as crimp terminals for connecting to the lead wires 6 and 6 are provided at the ends of the terminals 4 and 4 led out from the adapters 11 and 11.

  As shown in FIG. 4, lead wires 6 and 6 are connected to joints 5 and 5 of the terminals 4 and 4, and power is supplied to the heater wires 1 and 1 through the lead wires 6 and 6. A gasket 8 such as an O-ring is provided on the outer periphery of the sleeve 3 to maintain hermeticity against a vacuum chamber or the like.

  The present invention can improve the airtightness and watertightness of the heater adapter, and therefore can be applied to a structure in which a lead wire for supplying power from the outside is connected to a heater used in a vacuum. Thereby, it can be applied to heating of an object in a vacuum, such as being applicable to a heater for heating a substrate in a vacuum.

It is sectional drawing which shows the heater adapter which is one Embodiment of this invention. It is sectional drawing which shows the structure of the terminal adapter of the heater wire of the heater adapter which is one Embodiment of this invention. It is sectional drawing which shows the process of assembling the heater terminal and sleeve of the heater adapter which is one Embodiment of this invention. It is sectional drawing which shows the state which assembled the heater terminal and sleeve of the heater adapter which is one Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heater wire 2 Adapter part 3 Sleeve 4 Terminal 5 Joint 6 Lead wire 8 Gasket 11 Adapter 12 Inorganic insulating material 13 Seal material 14 Sleeve outlet

Claims (2)

Metal rod-like terminals (4), (4) are connected to the heater wires (1), (1) derived from both ends of the sheath of the sheath heater containing the heating wires, and these heater wires (1), (1) In the heater adapter in which the connection portion with the terminals (4) and (4) is housed in the adapter (11), the heater wires (1) and (1) and the terminals (4) and (4) connected thereto are connected to a metal thin tube. Heater adapters (1), (1) and (1), and the inorganic wires (12), (12) filled in the adapters (11), (11). The terminals (4) and (4) are insulated from the adapters (11) and (11) to form individual adapter parts (2) and (2). The adapter parts (2) and (2) While inserting into the sleeve (3), the ends of the adapters (2) and (2) are connected to the outlet ( 4) and (14), the adapters (11) and (11) of the adapter parts (2) and (2) are welded to the outlets (14) and (14) of the sleeve (3), and the sealing material 13 And a lead wire (6), (6) for connecting a power source to the terminal (4), (4). After the adapters (11) and (11) are welded to the outlets (14) and (14) of the sleeve (3), the adapters (11) and (11) and the sleeve (3) are heated to 200 ° C. or higher, and then the minimum A cable adapter characterized by being lowered to a limit of 70 ° C. and sealed with a sealing material 13.

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