JP2000133205A - Fixing method of coated lead wire product in discharge tube heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fixing method that can fix with reliability coated lead wire products in position at sufficient fixing strength without generation of harmful gas such as siloxane gas, even in heaters mounted on high-temperature discharge tubes of a heating temperature of 150 deg.C or more. SOLUTION: A coated lead wire product 4 is interposed between projections 1a on the back of a generally C-cross sectioned holder body 1, and a resilient tube 5 molded out of polymeric material is placed on the coated lead wire product 4 to extend along it. Over the coated lead wire product 4 and resilient tube 5, a cover 6 is disposed to deform or compress the resilient tube 5 whose resiliency in turn fixes the coated lead wire product 4 tight to the holder body 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a discharge tube (for example,
The present invention relates to a method of fixing a coated lead wire used in a heating device for preheating or heating an exposure fluorescent lamp of a copying machine, and in particular, a high-temperature discharge tube having a heating temperature of 150 ° C. or more. The present invention relates to a method of fixing a coated lead wire product suitable for a heating device to be mounted on a device.

[0002]

2. Description of the Related Art As is well known, an exposure fluorescent lamp incorporated in a copying machine changes its light output greatly depending on the ambient temperature. There are disadvantages in that the vapor pressure of the gas decreases, the rise time until light emission increases, and the light emission luminance decreases. Therefore, conventionally, a heating device is mounted on the outer surface of the fluorescent lamp, and the fluorescent lamp is heated and heated in advance, thereby preventing a decrease in the light emission speed and a decrease in the light emission luminance at a low temperature or at the time of starting the device. .

Conventionally, as a heating device used for this kind of purpose, for example, there is a device as shown in FIG. First, there is a holder 11 whose cross-sectional shape is curved in a substantially C-shape according to the shape of a fluorescent lamp in advance, and a heater element 12 is fixed to an inner peripheral surface of the holder 11. The holder 11 is made of, for example, a thermoplastic resin such as a vinyl chloride resin, a polycarbonate resin, an acrylic resin, a polysulfone resin, and a polyphenylene sulfide resin, while the heater element 12 is made of, for example,
Polyester film, on or between insulating films such as polyimide film, aluminum, stainless steel metal foil heater pattern made of conductive material formed by punching or fine pattern processing formed into a predetermined shape ing.

[0004] A coated lead wire product 13 connected to the heater element 12 is disposed along the longitudinal direction of the back side of the holder 11, and is fixed to the holder 11 by an insulating tape 14. The coated lead wire processed product 13 includes an insulated coated lead wire 13a in which a conductor is coated with an insulator, and a temperature control component 13b such as a thermal fuse or a thermistor. As the insulating tape 14, for example, a tape in which a glass fiber sheet or a polyester film or the like is used as a support and an adhesive layer such as an acrylic adhesive or a silicone adhesive is formed on one surface or both upper and lower surfaces thereof is used. .

[0005] In the heating device configured as described above, since the holder is formed in a substantially C-shape with an elastic resin material, it can be attached to a fluorescent lamp to be heated.
It is extremely easy to remove and has excellent workability for desorption, and has the advantage that the fluorescent lamp can be heated with excellent heating efficiency because the heater element can be attached to the surface of the fluorescent lamp in close contact. . Also, even if the life of the fluorescent lamp has expired,
Since only the fluorescent lamp can be replaced, there is also an advantage that fewer replacement parts are required.

[0006]

As described above, the above-described conventional heating apparatus has various advantages. Although no particular problem occurs when used in an ordinary copying machine, it has recently been proposed. Used in high-performance type copiers (for example, copiers in which the heating temperature of the fluorescent lamp for exposure rises to 150 ° C. or higher due to the increase in the copying speed and the sharpness of the copied image) In this case, there are the following problems.

First, in a heating device used for such a high temperature application, each component is made of the following materials from the viewpoint of heat resistance.
For example, the holder is a polysulfone resin having a heat resistance of 150 ° C., the insulating film forming the heater element is a polyimide film having a heat resistance of 210 ° C., and the insulating coating lead wire connected to the heater element is a fluorine rubber insulated wire having a heat resistance of 200 ° C. The insulating tape for fixing the insulating-coated lead wire to the holder is made of a glass fiber tape with a silicone adhesive (glass fiber has a heat resistance of 300 ° C., and a silicone adhesive has a heat resistance of 180 ° C.). The term "heat resistance" as used herein refers to a value measured in accordance with the "confirmation test of the upper limit of the operating temperature of insulators used in electrical products" based on the Electrical Appliance and Material Control Law technical standards. is there.

Each of the above-mentioned constituent materials is 150 ° C.
Fluorescent light for exposure, because the adhesive layer of the glass fiber tape used as the insulating tape is made of silicone-based material, although it has excellent heat resistance exceeding As a result, siloxane gas is generated from the adhesive layer due to the influence of the heat generation, and this siloxane gas adheres to the platen glass of a copying machine, which adversely affects the copying performance.

The present invention has been made on the basis of the above points, and the object of the present invention is to use it in a heating apparatus mounted on a high-temperature discharge tube having an exothermic temperature of 150 ° C. or more. Another object of the present invention is to provide a fixing method capable of securely fixing a coated lead wire product at a predetermined position with sufficient fixing strength without generating harmful gases such as siloxane gas.

[0010]

In order to achieve the above object, a method for fixing a coated lead wire product in a discharge tube heating apparatus according to the present invention is characterized in that a cross-sectional shape holding a heater element for heating a discharge tube is substantially C-shaped. A method for fixing a coated lead wire product connected to the heater element to a back side of a holder main body in the shape of a letter, comprising a predetermined distance on the back side of the holder main body. And a plurality of protrusions are protruded in a state of being extended in the longitudinal direction of the holder main body. The coated lead wire product is arranged between the protrusions, and then the coated lead wire is provided. By disposing an elastic tube formed of a polymer material along the longitudinal direction of the upper surface of the processed product, and then attaching a cover on the upper surface of the coated lead processed product and the elastic tube, Cube is pressed and deformed, and is characterized in that closely fixing the coated lead wire workpiece to the holder body by the elastic force of the elastic tube.

At this time, it is considered that the elastic tube is formed from a fluororubber composition containing a tetrafluoroethylene-α-olefin copolymer as a main component.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A heater element used in the present invention is one in which a metal foil heater pattern of a predetermined shape is provided on an insulating film or between insulating films. Examples of the insulating film include a polyethylene terephthalate film, a polyethylene naphthalate film, a polyimide film, a polyphenylene sulfide film, and the like. Any of these may be used, but when the heating device according to the present invention is applied to a high-temperature discharge tube having a heating temperature of 150 ° C. or higher, a polyimide having excellent heat resistance is used. Preferably, a film is used.

As the metal foil heater pattern, for example,
Examples thereof include a metal foil such as an aluminum foil, a stainless steel foil, a nickel chrome alloy foil, and a copper alloy foil formed into a predetermined shape by punching or fine patterning.

The heater element is used while being fixed and held by a holder body described later. As a fixing means at this time, for example, a method of bonding and fixing the inner peripheral surface of the holder body with a double-sided adhesive tape or the like is used. A method of preparing a molded component having a substantially C-shaped cross section to be fitted to the inner peripheral surface of the holder main body, arranging a heater element between the molded component and the holder main body, and holding and fixing the molded component can be considered.

The holder main body used in the present invention comprises:
It is formed into a substantially C-shaped cross section in advance according to the outer shape of the discharge tube using a conventionally known thermoplastic resin material such as a vinyl chloride resin, a polycarbonate resin, an acrylic resin, a polysulfone resin, and a polyphenylene sulfide resin.
Although the constituent material is not particularly limited, when the heating device according to the present invention is applied to a discharge tube for a high temperature in which the heat generation temperature becomes 150 ° C. or more, a polysulfone resin or a polyphenylene sulfide resin having excellent heat resistance is used. It is preferred to use

On the back side of the holder main body, a plurality of projections functioning as a storage section for storing and placing a coated lead wire product to be described later are provided at predetermined intervals, It protrudes in the state extended in the longitudinal direction.

The coated lead wire product used in the present invention comprises an insulated lead wire in which an insulator is coated on a conductor, and temperature control parts such as a thermal fuse, a thermistor, a thermal reed switch, and a thermostat. It is a thing. Examples of the insulator material constituting the insulation-coated lead wire include fluorine rubber, fluorine resin, olefin resin, and vinyl chloride resin. Any of these may be used, but when the heating device according to the present invention is applied to a high-temperature discharge tube having an exothermic temperature of 150 ° C. or higher, fluorine having excellent heat resistance is used. It is preferable to use rubber or fluororesin. As the insulator material having excellent heat resistance, in addition to the above-mentioned fluorine rubber and fluorine resin, for example, silicone rubber may be mentioned. However, in the case of silicone rubber, siloxane gas may be generated by heating, which is not preferable. .

The tube used in the present invention needs to be capable of fixing the above-mentioned coated lead wire processed product to the back side of the holder body by the pressing force. That is, an elastic tube made of a polymer material is used. Examples of the polymer material include fluoro rubber, olefin resin and olefin elastomer, and soft vinyl chloride resin. Any of these may be used,
When the heating device according to the present invention is applied to a high-temperature discharge tube having an exothermic temperature of 150 ° C. or higher, it is preferable to use fluororubber having excellent heat resistance.

Various types of fluororubbers have hitherto been known. Among them, for example, tetrafluoroethylene-α-olefin copolymers proposed by the present applicant in Japanese Patent Application Laid-Open No. 2-245047 are disclosed. A fluororubber composition containing a polymer as a main component is particularly preferred because it has both good heat resistance and good electrical properties and is excellent in cost performance.

Examples of the polymer material having excellent heat resistance include silicone rubber and fluororesin in addition to the above-mentioned fluororubber. In the case of silicone rubber, siloxane gas may be generated by heating. This is not preferable because it is not preferable because the fluororesin is inferior in flexibility and inferior in elasticity.

The cross-sectional shape of the elastic tube is not particularly limited. However, it is preferable that the elastic tube be in such a shape as to be in close contact with the inner wall surface of the cover and the inner wall surface of the holder body when the cover described later is attached. Therefore, it is preferable that the outer peripheral length of the elastic tube is longer than the inner wall peripheral length of the space formed by the holder body and the cover.

Here, as the substance having excellent elasticity, in addition to the above-described elastic tube, for example, a solid elastic sheet made of a polymer material, a porous elastic body, and the like are known. However, when these are used in place of the elastic tubes, it is difficult to bring the inner wall surface of the cover and the inner wall surface of the holder body into close contact with each other without any gap. Sufficient fixing strength cannot be obtained. Further, these materials are not preferable because they are easily limited in shape and size, and the cost is high.

The cover used in the present invention is made of a conventionally known thermoplastic resin material such as a vinyl chloride resin, a polycarbonate resin, an acrylic resin, a polyphenylene sulfide resin, and a polysulfone resin, similarly to the above-mentioned holder body. Although the constituent material is not particularly limited, when the heating device according to the present invention is applied to a discharge tube for a high temperature in which the heat generation temperature becomes 150 ° C. or more, a polysulfone resin or a polyphenylene sulfide resin having excellent heat resistance is used. It is preferred to use The shape is not particularly limited as long as the elastic tube can be pressed and deformed.

In the present invention, the processed lead wire is fixed to the holder body using the above-mentioned components in the following procedure.

First, a coated lead wire processed product is arranged between convex portions protruding from the rear side of the holder body. At this time, the connecting portion between the insulating coated lead wire and the temperature control component constituting the processed coated lead wire product may be appropriately subjected to insulation treatment using an insulating tube or an insulating paint.

Next, an elastic tube is arranged along the longitudinal direction of the upper surface of the coated lead wire product, and finally, a cover is attached to the upper surfaces of the coated lead wire product and the elastic tube. As a method for attaching the cover, for example, a method using an adhesive or a method using screw tightening can be considered. However, in consideration of workability, the hook portion that engages with the convex portion provided on the holder main body is covered. Forming on the sides and attaching them by fitting them is simple and preferred. If the cover is attached in such a manner, even if the temperature control parts have reached the end of their service life and need to be replaced, the cover can be easily removed and the replacement operation can be performed smoothly.

By attaching the cover to the upper surface of the coated lead wire product and the elastic tube, the elastic tube is pressed and deformed, and a gap is formed between the inner wall surface of the space formed by the holder body and the cover and the surface of the coated lead wire product. Adhere without sticking. As a result, the coated lead wire processed product is securely fixed in a state of being in close contact with the holder body. Since a strong frictional force is generated between the elastic tube and the inner wall surface and between the elastic tube and the coated lead wire product, even if an excessive tensile force is applied to the coated lead wire product, this frictional force is generated. Accordingly, the coated lead wire processed product does not move from a predetermined position of the holder main body.

At this time, if the elastic tube is formed of fluoro rubber having excellent heat resistance, for example, a heating device mounted on a high-temperature discharge tube having a heat generation temperature of 150 ° C. or more can be used. No harmful gas such as siloxane gas is generated during use. Therefore, even when the present invention is applied to a high-performance type copying machine or the like that has been proposed in recent years, it is possible to prevent the siloxane gas from adhering to the platen glass or the like and adversely affecting the copying performance.

As described above, by employing the fixing method of the present invention, the coated lead wire processed product is brought into close contact with the holder body with sufficient fixing strength without generating harmful gas such as siloxane gas. Although it is possible to securely fix, other than the above, for example, the following secondary effects also appear.

That is, according to the fixing method of the present invention, the temperature control component constituting the coated lead wire processed product has a structure in which the periphery thereof is covered without any gap by the elastic tube which also functions as a heat insulator. The heat generated in the element is efficiently conducted to the temperature control component via the holder body. Therefore, the heating by the heater element can be controlled with higher thermal responsiveness than before, and safety is improved.

[0031]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. This embodiment is based on the assumption that the fixing method of the present invention is applied to a heating device mounted on a fluorescent lamp for exposure of a copying machine in which the heat generation temperature becomes 150 ° C. or higher.

In this embodiment, the coated lead wire processed product was fixed in the following procedure. First, a holder main body 1 having a substantially C-shaped cross section was prepared by extrusion molding of polysulfone resin. On the back side of the holder main body 1, a pair of convex portions 1 a is provided so as to project at a predetermined interval and extend in the longitudinal direction of the holder main body 1.

Next, the heater element 2 was fixed to the inner peripheral surface of the holder body 1. In the present embodiment, a molded part 3 made of polysulfone resin having a substantially C-shaped cross section to be fitted to the inner peripheral surface of the holder body 1 is prepared, and a heater element is provided between the molded part 3 and the holder body 1. 2 was arranged and fixed.

As the heater element 2, an element in which a metal foil heater pattern made of stainless steel foil was formed into a predetermined shape by fine pattern processing on an insulating film made of a polyimide film was used. Further, coated lead wire products 4 are connected to the electrode portions formed at both ends of the heater element 2. In this embodiment, the coated lead wire processed product 4 is tetrafluoroethylene-
An insulated coated lead wire 4a having an outer diameter of 1.6 mm and made of a fluororubber composition containing an α-olefin copolymer as a main component and a temperature as a temperature control component connected to the insulated coated lead wire 4a The fuse 4b and the thermistor 4c were used.

Then, the coated lead wire processed product 4 having the above configuration
Is disposed between a pair of protrusions 1a protruding from the rear side of the holder body 1, and then along the longitudinal direction of the upper surface of the coated lead wire product 4, the inner diameter is 4 mm, the wall thickness is 0.5 mm, and the length is 20
The elastic tube 5 having a circular cross section of 0 mm was arranged. In this example, the elastic tube 5 was formed from a fluororubber composition containing a tetrafluoroethylene-α-olefin copolymer as a main component.

Finally, a cover 6 made of polysulfone resin and having a pair of hooks 6a engaging with the projections 1a of the holder body 1 is fitted on the upper surfaces of the coated lead wire product 4 and the elastic tube 5 by fitting. Attached.

By attaching the cover 6, the elastic tube 5 was pressed and deformed, and was brought into close contact with the inner wall surface of the space formed by the holder main body 1 and the cover 6 and the surface of the coated lead wire processed product 4.

Here, in order to confirm the fixing strength of the coated lead wire product thus fixed on the holder main body, the coated lead wire processed product is horizontally moved from the holder main body using a push-pull gauge. The tensile strength was measured when the coated lead wire was pulled out. The measurement of the fixing strength was performed for the case where two coated lead wire products were simultaneously pulled and the case where only one coated lead wire product was pulled. The number of times of the test was set to 5 times, and evaluation was made by an average value of the measured values.

As a result, the fixing strength when two coated lead wire products were simultaneously pulled was 8.3 kgf on average, and the fixing strength when only one coated lead wire product was pulled was 5.7 kgf on average. there were. Normally, the tensile force applied to a coated lead wire product used in an electric appliance is at most about 3 kgf, so that it can be said that both cases have practically sufficient fixing strength.

In the present embodiment, the heating device to which the coated lead wire processed product is fixed as described above is operated by a heating device having an exothermic temperature of one.
When the apparatus was mounted on a fluorescent lamp for exposure of a copying machine having a temperature of 50 ° C. or higher and energized, no abnormality such as generation of harmful gas was found at all.

The present invention is not limited to the above embodiment. In the above-described embodiment, an example in which the present invention is applied to a fluorescent lamp for exposure of a copying machine has been described. However, the present invention may be applied to a fluorescent lamp for illumination of an instrument panel of an automobile, for example.

[0042]

As described above in detail, according to the fixing method of the present invention, even when used in a heating device mounted on a high-temperature discharge tube having an exothermic temperature of 150 ° C. or more, siloxane gas or the like can be used. It is possible to reliably fix the coated lead wire processed product at a predetermined position of the holder main body with sufficient fixing strength without generating harmful gas.

Further, according to this method, the temperature control component constituting the coated lead wire processed product has a structure in which the periphery thereof is covered without any gap by the elastic tube which also functions as a heat insulator. As a result, the heating by the heater element can be controlled with higher thermal responsiveness, and the safety is improved.

[Brief description of the drawings]

FIG. 1 is a view showing one embodiment of the present invention, and is a cross-sectional view showing a state where a coated lead wire processed product is fixed on a holder main body.

FIG. 2 is a view showing one embodiment of the present invention, and is an exploded perspective view showing a configuration of a heating device.

FIG. 3 is a cross-sectional view showing a fixed state of a coated lead wire processed product in a conventional heating device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Holder main body 1a ... Convex part 2 ... Heater element 3 ... Molded part 4 ... Coated lead wire processed product 4a ... Insulated coated lead wire 4b ... Temperature control component (thermal fuse) 4c ... Temperature control component (thermistor) 5 ... Elastic tube 6 Cover 6a Hook

Claims (2)

[Claims] 1. A covered lead for fixing a coated lead wire product connected to the heater element to a back side of a holder body having a substantially C-shaped cross section holding a heater element for heating a discharge tube. A method for fixing a wire processing product, wherein a predetermined interval is present on the back side of the holder body,
In addition, a plurality of protrusions are protruded in a state of being extended in the longitudinal direction of the holder main body, and the coated lead wire processed product is disposed between the protrusions. An elastic tube formed from a polymer material is disposed along the longitudinal direction, and then a cover is attached to an upper surface of the coated lead wire processed product and the elastic tube, thereby deforming the elastic tube by pressing. A method of fixing a coated lead wire product in a discharge tube heating device, wherein the coated lead wire product is tightly fixed to a holder body by the elastic force of the above. 2. The discharge tube heating apparatus according to claim 1, wherein the elastic tube is formed from a fluororubber composition containing a tetrafluoroethylene-α-olefin copolymer as a main component. How to fix coated lead wire products.