JP2010080149A - Halogen lamp, heating device, manufacturing method of halogen lamp - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To materialize a halogen lamp with a strong sealing portion even through vibration and/or shock, while a plurality of filaments are formed in one uniform bulb under a non-contact state with each other. <P>SOLUTION: The halogen lamp accommodates filaments 12, 13 inside of a quartz glass bulb 11. At both ends of the filament 12, one end of metal foil 161, 162 are welded, and at the other ends of metal foil 161, 162, outer leads 181, 182 are welded respectively. At both ends of the filament 13, one end of metal foil 171, 172 are welded, and at the other ends of metal foil 171,172, the outer leads 191,192 are welded respectively. A sealing portion 151, the bulb 11 formed by a pressure reduction sealing method at the location of the metal foil 161,171, and the sealing portion 152, the bulb 11 formed by the pressure reduction sealing method at the location of metal foil 162, 172 are each formed. A positioning of the filaments 12 and 13 are made inside of the bulb 11 and are supported by a plurality of insulating and heat-resistant anchors 14. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a halogen lamp, a heating apparatus, and a halogen lamp manufacturing method in which an electric resistance heating element is provided inside a radiation transmissive bulb used for fixing of a copying machine, for example, and a sealing portion is formed under reduced pressure.

Conventionally, the sealing part of a halogen lamp used for fixing in a copying machine is based on a decompression method that prevents oxidation of the metal foil for sealing and breakage of the foil, and does not require a tip tube used for gas sealing. Sealing is considered. (For example, Patent Document 1)
JP 9-320547 A

  In the technique of Patent Document 1 described above, the sealing portion of a heat-resistant glass valve is sealed while being decompressed by a burner. Since the halogen lamp thus obtained can have the same sealing thickness, the strength of the sealing portion can be increased.

  However, in the case of using a plurality of halogen lamps, there is a problem that not only the number of mounting operations is required but also a space for mounting is required.

  An object of the present invention is to use a halogen lamp that can form a plurality of filaments in the same bulb and configure a common bulb in a non-contact state while realizing a high performance sealing portion. It is to provide a heating device and a halogen lamp manufacturing method.

  In order to solve the above-described problem, in the halogen lamp of the present invention, the first and second filaments made of tungsten arranged in a non-contact state in the longitudinal direction in the bulb made of heat-resistant glass, A metal foil connected to one end of each of the first and second filaments, a power supply outer lead connected to the other end of the metal foil, the metal foil portion, and the metal foil A sealing portion in which the valve is sealed by a reduced pressure sealing method in a state where a sleeve made of the same material as the valve is disposed; an insulating support member for positioning and insulating the first and second filaments; It is characterized by comprising.

  In the heating apparatus of this invention, the 1st and 2nd roller arrange | positioned up and down and at least one is heated, The one in any one of Claims 1-7 arrange | positioned in the said 1st or 2nd roller. The present invention is characterized in that a halogen lamp and means for fixing the toner by moving the copy paper onto which the toner has been transferred in advance between the first and second rollers are provided.

  In the heater lamp manufacturing method of the present invention, the inner lead, the metal foil, and the outer lead are connected in series to both ends of the first filament, and the inner lead, the metal foil, A step of connecting the outer leads in series, a step of placing a sleeve made of heat resistant glass in a state of being positioned on each of the metal foils, and a plurality of locations in the longitudinal direction of the first and second filaments Attaching a heat-resistant and insulating anchor, and housing the first and second filaments connected in series in the process together with the sleeve and the anchor in a cylindrical valve made of heat-resistant glass; And a step of firing and sealing the metal foil and the sleeve with a burner in a state where the inside of the valve is decompressed, Wherein the step of cutting the outer leads to an appropriate length from the sealing portion formed in step positioned outside of the outer valve and the valve, in that it consists of.

  In the heater lamp manufacturing method according to the present invention, the inner lead, the metal foil, and the outer lead are connected in series to both ends of the first filament, and the inner lead and the metal are connected to both ends of the second filament. A step of connecting the foil and outer leads in series, a step of placing a sleeve made of heat-resistant glass in a state of being placed on each of the metal foils, and a longitudinal direction between the first and second filaments A step of disposing a heat-resistant and insulating insulating substrate, and supporting the first and second filaments connected in series in the step together with the sleeve and the insulating substrate in a cylindrical valve made of heat-resistant glass A step of performing sealing with firing the metal foil and the sleeve with a burner in a state in which the inside of the valve is decompressed, and the process Wherein the step of cutting the outer leads to an appropriate length from the in formed sealed portions located outside of the outer valve and the valve, in that it consists of.

  According to the present invention, the plurality of filaments formed on the common valve by being resistant to vibration and impact by sealing with a reduced pressure by disposing an insulating and heat-resistant non-contact member for the plurality of filaments. It can be lit.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.

  1 and 2 are diagrams for explaining an embodiment of the halogen lamp according to the present invention. FIG. 1 is a configuration diagram, and FIG. 2 is an enlarged view of a main part of FIG.

  In FIGS. 1 and 2, reference numeral 100 denotes a halogen lamp which is a kind of tube-type incandescent lamp. The halogen lamp 100 is frequently used as a heater for fixing, for example, and is configured by two lamps in a common cylindrical bulb 11 made of quartz glass having radiation permeability. The bulb 11 has a wall thickness of about 1 mm and an outer diameter of about 8 to 10 mm. Inside the bulb 11, tungsten filaments 12 and 13, which are examples of electric resistance wires of heat-resistant metal, are accommodated concentrically as a heat source. The filaments 12 and 13 are kept concentric with the bulb 11 by a plurality of insulating and heat-resistant anchors 14 made of, for example, quartz glass, arranged in the bulb 11 in the axial direction. The anchor 14 constitutes an insulating support member that functions to position the filaments 12 and 13 in the bulb 11 and to support them in a non-contact state.

  As shown in FIG. 2, the anchor 14 is formed with a support hole 141 for supporting the filament 12 and a support hole 142 for supporting the filament 13, and the anchor 14 before the filament 13 is accommodated in the bulb 11. The filaments 12 and 13 are passed through and supported in advance.

Further, in the bulb 11, an inert gas such as argon Ar or nitrogen N ₂ is mixed with a trace amount of a halogen substance such as bromine Br or chlorine Cl at about 0.9 × 10 ⁵ Pa (pascal) at a room temperature of 25 ° C. ). Sealing portions 151 and 152 by reduced pressure sealing are formed at both ends of the valve 11 in the axial direction. In the sealing portion 151, rectangular foil-shaped metal foils 161 and 171 formed of, for example, conductive molybdenum having an expansion coefficient approximate to that of the valve 11 are embedded. Rectangular foil-shaped metal foils 162 and 172 are embedded in the sealing portion 152, respectively.

  The filaments 12 and 13 are supported in a state where tension is applied between the sealing portions 151 and 152, thereby preventing the filaments 12 and 13 from being bent between the anchors 14.

  One end of the metal foil 161 is connected to the other end of the inner lead 121 whose one end is connected to the filament 12, and the other end of the inner lead 122 whose one end is connected to the filament 12 is connected to one end of the metal foil 162. The The other end of the metal foil 161 is connected to the outer lead 181 for supplying power, and the other end of the metal foil 162 is connected to the outer lead 182 for supplying power.

  Similarly, the other end of the inner lead 131 whose one end is connected to the filament 13 is at one end of the metal foil 171, and the other end of the inner lead 132 whose one end is connected to the filament 13 is at one end of the metal foil 172. Are connected to each other. The other end of the metal foil 171 is connected to the outer lead 191 for supplying power, and the other end of the metal foil 172 is connected to the outer lead 192 for supplying power.

  In the sealing method using reduced pressure, the lamp is sealed once except for the sealing portion, and the molybdenum foil is hermetically sealed in a state where the inside of the lamp including the sealing portion is decompressed. This sealing method can improve the strength of the sealing portion because the thickness of the quartz glass is not biased unlike the sealing method by the pinch seal.

  Instead, the support holes 141 and 142 formed in the anchor 14 are notched from the edge of the anchor 14 to facilitate attachment to the filaments 12 and 13, and the filaments 12 and 13 are directly formed from the notches. May be engaged. Further, the anchor 14 may be deformed to an appropriate position of the valve 11 from the outside using a heating means such as a burner so that the axial direction of the valve 11 does not move freely.

  By the way, as shown in FIG. 3, a sleeve 31 made of the same material as that of the valve 11 is formed on the metal foil 161 inside the valve 11 where the metal foils 161 and 171 before the sealing portions 151 and 152 are formed. 33 is arranged on the metal foil 171 to melt the valve 11 and the sleeves 31 and 33. Thereby, the thick decompression sealing part 151 is formed compared with the case where decompression sealing is performed only by the valve 11.

  As shown in FIG. 4, the cylindrical sleeve 31 (32 to 34) has a bottom 41, and a through hole 42 is provided in the bottom 41. The outer diameter of the sleeve 31 is set to be slightly smaller than the inner diameter of the bulb 11, and the through hole 42 can be penetrated to the outer lead 161 and has a hole diameter smaller than the length of the metal foil 151 in the width direction. As a result, the sleeve 31 is dressed to accommodate the metal foil 161. The sleeves 32 to 34 located on the metal foil 152 have the same configuration.

  Although only the sealing portion 151 side is shown in FIG. 3, sleeves (32, 34) are also arranged on the metal foils 162, 172 side to melt the valve 11 and the sleeves (32, 34). As a result, the reduced pressure sealing portion 152 is formed thicker than when only the valve 11 is sealed under reduced pressure.

  In this embodiment, since two filaments are configured in a common bulb, space saving can be realized when two separate halogen lamps are used. In addition, the two parts can be used as a common sealing part by reducing the pressure, and the sleeve can increase the thickness of the glass of the sealing part. It is possible to suppress this.

  Furthermore, by using an anchor of an insulating and heat-resistant non-contact member, it is possible to prevent contact between two filaments, and to form a sealed portion having a small diameter and strong strength against vibration and impact.

  In addition, although the sleeve for making the sealing part thick is arranged in the valve, it may be outside the valve at the position to be the sealing part. In addition, although two examples of filaments have been given, it is possible to realize three or more filaments.

  5 to 7 are diagrams for explaining a state in which the base is attached to the sealing portion of the halogen lamp, FIG. 5 is a configuration diagram, FIG. 6 is a front view of the base, and FIG. The right side view of is shown.

  As shown in FIG. 5, ceramic bases 51 and 52 are attached to the sealing portions 151 and 152, for example. As shown in FIGS. 6 and 7, the caps 51 and 52 are configured by a fitting portion 511 for fitting a sealing portion and insertion holes 512 and 513 for inserting outer leads.

  8 and 9 are diagrams for explaining another embodiment of the halogen lamp of the present invention, FIG. 8 is a configuration diagram, and FIG. 9 is a cross-sectional view taken along the line I-I ′ of FIG. 8. In addition, the same code | symbol is attached | subjected to the component same as embodiment mentioned above, and description here is abbreviate | omitted.

  In this embodiment, instead of the quartz glass anchor, for example, a heat-resistant and insulating ceramic insulating substrate 81 is used to partition the filaments 12 and 13 for electrical separation. The insulating substrate 81 is supported by embedding both ends in accordance with the formation of the sealing portions 151 and 152. The insulating substrate 81 constitutes an insulating support member that functions to position the filaments 12 and 13 within the bulb 11 and to support the filaments 12 and 13 in a non-contact state.

  Since this embodiment does not require an anchor in addition to the effect of the above-described embodiment, the configuration of the filament can be simplified. Even when an anchor is necessary, a supporting member can be set up on the insulating substrate, and the filament can be supported by this member.

  In the halogen lamp of the present invention described above, it is illustrated with a filament that emits light between the inner lead, but as shown in FIG. 10, light distribution is achieved by alternately forming the light emitting portion 101 and the non-light emitting portion 102. You can adjust it. It is also possible to change the shape of the filaments 12 and 13 to obtain a desired light distribution.

  In addition, by switching and using filaments 12, 13 ′ having different light emitting areas as shown in FIG. 11, for example, one is switched to A4 size paper and the other is switched to A3 size paper. By using only one of them, it is possible to cope with switching to power saving.

  Next, an embodiment relating to a method of manufacturing a halogen lamp according to the present invention will be described with reference to FIGS. 12 and 13 show a method for manufacturing the halogen lamp shown in FIGS.

  First, in FIG. 12A, inner leads 121, 122, metal foils 161, 162, outer leads 181, 182 and anchors 123, 124 are integrally connected to the ends of the filament 12 in series. Prepare one in state. Inner leads 131 and 132, metal foils 171 and 172, outer leads 191 and 192, and anchors 125 and 126 integrally connected to the tips of the filaments 13 are prepared at both ends of the filament 13, respectively.

  The metal foils 161 and 162 are accommodated in the sleeves 31 and 32. The sleeves 31 and 32 are allowed to pass through the through holes 42 against the elasticity of the anchors 123 and 124 before being inserted into the metal foils 161 and 162, respectively. The metal foils 171 and 172 are accommodated in the sleeves 33 and 34. The sleeves 33 and 34 are allowed to pass through the through holes 42 against the elasticity of the anchors 123 and 124 before being inserted into the metal foils 171 and 172, respectively.

  One end of the filament 12 and the inner lead 121, the metal foil 161 and the outer lead 181 are connected in series, and the other end of the filament 12 and the inner lead 122, the metal foil 162 and the outer lead 182 are connected in series. For example, it couple | bonds by spot welding. Similarly, one end of the filament 13 and the inner lead 131, the metal foil 171, and the outer lead 191 are connected in series, and the other end of the filament 13 and the inner lead 132, the metal foil 172, and the outer lead 192 are connected in series. Each of them is joined by spot welding, for example.

  Between the filaments 12 and 13, an insulating substrate 81 made of heat-resistant and insulating ceramic is disposed. Although there is no mention of temporary holding of the insulating substrate 81, one end is suspended from the other end in a state where the inside of the valve is pressed by an anchor 123.

  In FIG. 12B, the filament 12 and the like that are connected and integrated in series in FIG. 12A are accommodated in, for example, a quartz glass bulb 11 whose one end is sealed in advance. At this time, the filaments 12 and the like connected in series by the anchors 123 and 124 are linearly arranged in the bulb 11 and maintained. Further, the filament 13 and the like connected and integrated in series in FIG. 12A are accommodated in, for example, a quartz glass bulb 11 whose one end is sealed in advance. At this time, the filament 13 and the like connected in series by the anchors 125 and 126 are linearly arranged in the bulb 11 and maintained. The filaments 12 and 13 connected in series are accommodated in the bubble 11 at the same time.

  Further, the halogen gas 500 Torr is sealed and temporarily exhausted, and then the reduced pressure sealing is performed on the open end side of the bulb 11. Then, the burner 127 is baked at a constant heating power at a portion to be the sealing portion 151, and the valve 11 is rotated at a constant rotational speed to form a sealing portion 151 having a thickness to which the sleeves 31 and 33 are added. At the same time, one end of the insulating substrate 81 is embedded in the sealing portion 151.

  In FIG. 12C, the state of FIG. 12B is turned upside down, the burner 127 is fired at a portion to become the sealing portion 152 with a constant heating power, and the sleeve 11 is added by rotating the valve 11. A sealing portion 152 having a thickness is formed. At the same time, the other end of the insulating substrate 81 is embedded in the sealing portion 152.

  In FIG. 13D, both opening sides of the bulb 11 leaving the sealing portions 151 and 152 are cut by means such as laser, and the anchors 123 to 126 and the outer leads 181 and 182 and 191 and 192 are appropriately arranged. By cutting with the length remaining, the halogen lamp 100 of FIG. 13E is completed.

  In the case of the method of manufacturing the halogen lamp of the present invention described with reference to FIGS. 1 to 4, the anchors 14 are replaced with the lengths of the filaments 12 and 13 in the process of FIG. What is necessary is just to attach suitably to a direction.

  In this halogen lamp manufacturing method, reliable vacuum sealing with a plurality of filaments can be realized based on the thickness added from the sleeve. Furthermore, it is possible to ensure insulation between the plurality of filaments.

  FIGS. 14 and 15 illustrate one embodiment of the heating apparatus of the present invention using the halogen lamp of FIG. 5 in which a base is attached to the halogen lamp described in FIGS. 1 to 4. FIG. 14 is a schematic diagram. FIG. 15 is a sectional view taken along the line II-II ′ of FIG.

  14 and 15, reference numeral 200 denotes a heating device. Reference numeral 201 denotes a cylindrical heating roller made of a metal such as aluminum or iron. The outer peripheral surface of the heating roller 201 is covered with a coating material 202 made of a heat-resistant resin. Inside the heating roller 201, the halogen lamp 100, which is a heat source, is supported using support means (not shown) via the caps 51 and 52 described in FIG.

  Reference numeral 203 denotes a cylindrical pressure roller made of a metal such as aluminum or iron, which is in pressure contact with the heating roller 201 and is opposed downward. The outer peripheral surface of the pressure roller 203 is covered with an elastic layer 204 made of, for example, silicon rubber. A resin coating for smoothing the surface may be formed on the surface of the elastic layer 204 so that the passing paper can be easily separated from the pressure roller 203 after fixing.

  In the pressure roller 203, the shaft 205 is rotatably supported using a support unit 206. A rotating gear 207 is attached to both ends of the heating roller 201. The rotating gear 207 and the rotating gear attached to the rotating shaft of the motor are engaged with each other, and the heating roller 201 and the pressure roller 203 are rotated by rotating the motor. Can be rotated in the directions of arrows A and B in FIG.

  When the halogen lamp 100 of the heating roller 201 is energized, the heating roller 201 generates heat and heats up (heats up). Accordingly, the heating roller 201 and the pressure roller 203 are rotated in the directions of arrows A and B in FIG. 15, and the copy paper P on which the toner T is transferred in a predetermined distribution state from a transfer drum (not shown) is heated up. By being fed between 201 and the pressure roller 203, the copy paper P and the toner T1 applied in the previous step are heated from above and below, and the heated toner T2 is fixed on the copy paper P after being melted. It is drawn as letters and designs.

  In the heating device described above, the pressure roller 203 may be configured as a heating roller similar to the heating roller 201. The number of halogen lamps 100 attached to the lamp attachment device 100 is not limited to two (main), and may be three or more.

  In this embodiment, since a plurality of filaments are formed in the common bulb 11, space can be saved as compared with the case where a plurality of halogen lamps are attached. In addition, since the sealing is performed under reduced pressure, the halogen lamp can be attached with improved mechanical strength.

  The heating device is used for fixing image forming apparatuses such as copying machines, but is not limited to this, and is not limited to home appliances, precision instruments for business use or experiments, equipment for chemical reactions, etc. It can be used as a heat source for heating and heat retention when attached to the same.

The block diagram for demonstrating one Embodiment regarding the halogen lamp of this invention. The perspective view of the principal part of FIG. Explanatory drawing for demonstrating the pre-stage which forms a sealing part. 3 is an enlarged perspective view of the main part. The block diagram for demonstrating the state which attached the nozzle | cap | die to the structure of FIG. The front view for demonstrating the nozzle | cap | die of FIG. The right view of FIG. The block diagram for demonstrating other embodiment regarding the halogen lamp of this invention. I-I 'sectional drawing of FIG. Explanatory drawing for demonstrating the other example of the filament used for the halogen lamp of this invention. Explanatory drawing for demonstrating another example of the filament used for the halogen lamp of this invention. Explanatory drawing for demonstrating the process of (a)-(c) of one Embodiment regarding the halogen lamp manufacturing method of this invention. Explanatory drawing for demonstrating the process of (d) and (e) of one Embodiment regarding the halogen lamp manufacturing method of this invention. The schematic block diagram for demonstrating one Embodiment regarding the heating apparatus of this invention. II-II 'sectional drawing of FIG.

Explanation of symbols

100 Halogen lamp 11 Bulb 12, 13, 13 'Filament 121, 122, 131, 132 Inner lead 14, 123-126 Anchor 141, 142 Support hole 151, 152 Sealing part 161, 162, 171, 172 Metal foil 181, 182 , 191, 192 Outer leads 31 to 34 Sleeve 81 Insulating substrate 127 Burner 200 Heating device 201 Heating roller 203 Pressure roller

Claims (10)

First and second filaments made of tungsten disposed in a non-contact state electrically in a longitudinal direction in a bulb made of heat-resistant glass;
A metal foil having one end connected to each end of each of the first and second filaments;
An outer lead for power supply connected to the other end of each of the metal foils;
A sealing portion in which the valve is sealed by a reduced pressure sealing method in a state where the metal foil portion and the sleeve of the same material as the valve are disposed;
A halogen lamp, comprising: an insulating support member for positioning and insulating the first and second filaments.   The halogen lamp according to claim 1, wherein the support member also serves as anchors arranged at a plurality of locations in the longitudinal direction in the bulb.   2. The halogen lamp according to claim 1, wherein the support member is an insulating and heat-resistant insulating substrate disposed between the first and second filaments.   The halogen lamp according to claim 3, wherein both ends of the insulating substrate are fixed in a state of being embedded in the sealing portion.   The halogen lamp according to any one of claims 1 to 4, wherein the sealing portion is thickened by using a sleeve made of the same material as the bulb when the sealing portion is formed.   The halogen lamp according to claim 1, wherein the first and second filaments have different light distributions.   7. The halogen lamp according to claim 6, wherein the first and second filaments having the different light distributions are switched and used. First and second rollers which are arranged one above the other and at least one is heated;
The halogen lamp according to any one of claims 1 to 7, which is disposed in the first or second roller,
A heating apparatus, comprising: a copy sheet onto which toner has been transferred in advance; and means for fixing the toner by moving between the first and second rollers. A step of connecting an inner lead, a metal foil, and an outer lead in series to both ends of the first filament;
A step of connecting an inner lead, a metal foil, and an outer lead in series to both ends of the second filament;
Placing a heat-resistant glass sleeve in a state of being positioned on each of the metal foils;
Attaching heat-resistant and insulating anchors to a plurality of longitudinal locations of the first and second filaments;
Storing the first and second filaments connected in series in the step together with the sleeve and the anchor in a cylindrical bulb made of heat-resistant glass;
In a state where the inside of the valve is decompressed, the metal foil and the sleeve are fired with a burner and sealed,
A method of manufacturing a heater lamp, comprising: a step of cutting an outer bulb and an outer lead located outside the bulb from the sealing portion formed in the step to an appropriate length. Connecting the inner lead, the metal foil, and the outer lead in series to both ends of the first filament;
A step of connecting an inner lead, a metal foil, and an outer lead in series to both ends of the second filament;
Placing a heat-resistant glass sleeve in a state of being positioned on each of the metal foils;
Disposing a heat-resistant and insulating insulating substrate in a longitudinal direction between the first and second filaments;
Supporting the first and second filaments connected in series in the step together with the sleeve and the insulating substrate in a cylindrical valve made of heat resistant glass;
In a state where the inside of the valve is decompressed, the metal foil and the sleeve are fired with a burner and sealed,
A method of manufacturing a heater lamp, comprising: a step of cutting an outer bulb and an outer lead located outside the bulb from the sealing portion formed in the step to an appropriate length.

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