JP2008004293A - Lamp unit, lamp mounting device, heating device, and image forming device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve downsizing of a lamp unit as a whole by coupling a plurality of rod-shaped heater lamps constituting the lamp unit with as small coupling members as possible. <P>SOLUTION: A heater lamp 10A equipped with shrink seal parts 12a, 12b with either end sealed by a decompression method and a heater lamp 10B equipped with shrink seal parts 12c, 12d likewise with either end sealed by a decompression method are arranged in a state in contact with each other or very close to each other. In that state, both ends of the heater lamps 10A, 10B are supported with the use of common coupling members 111, 112. Circumscribed circles of the shrink seal parts 12a, 12c and 12b, 12d can be made smaller than those of the heater lamps 10A, 10B. By this, the coupling member 111 coupling the shrink seal pats 12a, 12c and the coupling member 112 coupling the shrink seal parts 12b, 12d can be made compact, contributing to downsizing of the lamp unit 100 as a whole. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a lamp unit used for fixing toner in a copying machine or a printer, a lamp unit mounting device for mounting the lamp unit, a heating device using the lamp unit mounting device, and an image forming apparatus using the heating device. About.

In a conventional lamp unit, three or more rod-shaped heater lamps each having a bulb having pinch seal portions at both ends are arranged so as to extend in parallel with each other, and are connected by common connecting members at both ends of each heater lamp. The plurality of heater lamps have a regular polygon formed by a plurality of virtual straight lines connecting the centers of adjacent heater lamps, and the flat surfaces of the pinch seal portions of the respective heater lamps are parallel to different virtual straight lines. In a state where the straight tubular portions other than the pinch seal portion in the bulb are in contact with each other or in a state where the distance between the outer peripheral surfaces of the straight tubular portions in adjacent heater lamps is 1 mm or less. Has been. (For example, Patent Document 1)
JP 2005-216734 A

  Since the technique of Patent Document 1 described above performs sealing by pinch seals at both ends of the lamp unit, a plurality of heater lamps are unitized and these both ends are connected by a connecting member. However, since the flat part of the pinch seal part is the same as the diameter of the heater lamp, the connecting member needs to have an outer periphery size enough to bundle a plurality of pinch seal parts. There was a problem.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a lamp unit capable of reducing the size of the entire system by compactly supporting a plurality of rod-shaped tube-type incandescent bulbs, a lamp mounting apparatus for mounting the lamp unit, and a lamp mounting An object of the present invention is to provide a heating apparatus to which the apparatus is attached and an image forming apparatus using the heating apparatus.

  In order to solve the above-described problems, a lamp unit of the present invention has a plurality of rod-shaped heater lamps each having a radiation-transmitting bulb sealed at both ends, and both ends of the heater lamps are shared. In the lamp unit connected by a connecting member, sealing of both ends of the bulb is a shrink seal part that is sealed by decompression, and the connecting member connects the plurality of shrink seal parts by connecting the shrink seal parts. The lamps are arranged so as to extend parallel to each other.

  Further, in a lamp unit comprising a plurality of rod-shaped heater lamps each having a radiation transmissive bulb sealed at both ends, and both ends of the heater lamps connected by a common connecting member, The sealing is a shrink seal part sealed by decompression, and the connecting member is connected to the shrink seal part to arrange the plurality of heater lamps so as to extend in parallel with each other, It is characterized by having a size that falls within a circumscribed circle in contact with the outer peripheral surface of the plurality of heater lamps.

  According to the present invention, it is possible to reduce the size of the support part for attaching a plurality of lamp units bundled while strengthening the sealing part. Therefore, it is possible to realize a more compact system when using the lamp unit. It becomes possible.

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

  FIG. 1 is a perspective view for explaining a schematic configuration of an embodiment of a lamp unit according to the present invention, and FIG. 2 is a side view showing an arrangement state when the lamp unit shown in FIG. 1 is viewed from the longitudinal direction. It is.

  In FIG. 1, a lamp unit 100 is arranged such that two rod-shaped heater lamps 10A and 10B having an outer diameter of about 6 to 15 mm extend in parallel, and are formed of heat-resistant insulating materials at both ends of the heater lamps 10A and 10B. And connected and held by common connecting members 111 and 112.

  The heater lamps 10A and 10B each have substantially straight tubular valves 13a and 13b in which shrink seal portions 12a and 12b are formed at both ends by sealing under reduced pressure. A filament 14a is disposed in the bulb 13a so as to extend along the tube axis direction of the bulb 13a, and an inert gas and a halogen gas are enclosed in a required amount. In the bulb 13b, the filaments 14b and 14c are arranged in series connected so as to extend along the tube axis direction of the bulb 13b, and necessary inert gas and halogen gas are enclosed in an enclosed amount.

  Both end portions of the filament 14a protrude from the end surfaces of the shrink seal portions 12a and 12b via conductive foils 16a and 16b made of, for example, molybdenum, hermetically sealed and embedded in the shrink seal portions 12a and 12b, respectively. Are connected to the external lead rods 17a and 17b. Further, both ends of the filaments 14b and 14c connected in series are shrink-sealed via conductive foils 16c and 16d made of, for example, molybdenum, hermetically sealed and embedded in the shrink seal portions 12c and 12d, respectively. It is connected to external lead rods 17c and 17d extending from the end faces of the portions 12c and 12d.

  The connecting member 111 is formed with large-diameter support holes 18a and 18c for inserting the shrink seal portions 12a and 12c, and small-diameter support holes 19a and 19c for inserting the external lead rods 17a and 17c, respectively. The connecting member 112 is formed with large-diameter support holes 18b and 18d for inserting the shrink seal portions 12b and 12d, and small-diameter support holes 19b and 19d for inserting the external lead rods 17b and 17d, respectively. Further, support portions 201 and 202 are integrally formed with the connecting members 111 and 112.

  As described above, the shrink seal portions 12a and 12c of the heater lamps 10A and 10B are inserted into the connecting member 111, and the shrink seal portions 12b and 12d of the heater lamps 10A and 10B are inserted and fixed into the connecting member 112, respectively. Constitute.

  Note that one end of a lead wire (not shown) is connected to each of the external lead rods 17a to 17d, and power is supplied to the other end, thereby turning on the heater lamps 10A and 10B.

  Here, an example of a method of sealing the shrink seal portions 12a to 12d that is sealed by decompression will be described.

  Sealing with a shrink seal is to hermetically seal the molybdenum foil in a state where the heater lamp is once sealed at a portion other than the portion to be sealed and the inside of the heater lamp including the sealed portion is decompressed. In this sealing method, the strength of the sealing portion is improved because the thickness of the quartz glass is not biased as in the sealing method using a pinch seal. In addition, as a specific example of a tube-type incandescent bulb sealed with a plurality of shrink seals, the method is described in JP-A-9-320547.

  By the way, as shown in FIG. 2, the heater lamps 10A and 10B have a chip 21a, which is a residual portion of the gas exhaust introduction pipe protruding from the outer peripheral surfaces of the bulbs 13a and 13b by about 1 to 5 mm for manufacturing reasons. 21b is formed, and when the lamp unit 100 is configured to be small, it is necessary to consider the arrangement positions of the chips 21a and 21b in the circumferential direction of the bulbs 13a and 13b.

  An example of arrangement positions of the chips 21a and 21b will be described. The chips 21a and 21b in the heater lamps 10A and 10B are preferably arranged so as to be close to the counterpart bulb 13 so as to be within the circumscribed circle Ca of the bulbs 13a and 13b, depending on the chip size. . Accordingly, the tips 21a and 21b can reduce the protruding amount of the bulbs 13a and 13b with respect to the circumscribed circle Ca as much as possible without interfering with adjacent heater lamps, and the lamp unit can be downsized. Can be achieved. At this time, since the sealing portion is a shrink seal, it is not affected by the positions of the chips 21a and 21b, and the degree of freedom in changing the position in the circumferential direction can be improved.

  3 is a side view showing a state viewed from the same direction as FIG. 2 with the connecting member 112 attached, and FIG. 4 is a view of FIG. 4a-a in a state where the shrink seal portions 12b and 12d are attached to the connecting member 112. 'Cross section.

  Since the circumscribed circle Cb of the shrink seal portions 12b and 12d can be made smaller than the circumscribed circle Ca of the valves 13a and 13b, the connecting member 112 can be of a size that can enter the circumscribed circle Ca.

  5 and 6 show a lamp unit 100 configured by connecting the connecting members 111 and 112 to the heater lamps 10A and 10B. FIG. 5 shows a front view and FIG. 6 shows a side view of FIG. .

  As can be seen from FIG. 5 and FIG. 6, the connecting members 111 and 112 can have a length smaller than the length in which two heater lamps 10A and 10B are arranged and a height lower than one. Thus, the size of the lamp unit 100 can be reduced.

  The heater lamps 10A and 10B have different heat generation patterns (heat generation regions). For example, as shown in FIG. 7A, the heater lamp 10A has a filament 14a at the center of the bulb 13a, and the heater lamp 10B has filaments 14b and 14c at both ends of the bulb 13b, as shown in FIG. 7B. It is configured to have a heat generating region in the part. The heater lamp 10A is a fixing heater lamp for an A4 size recording material, for example, and FIG. 7C, in which the heater lamps 10A and 10B are combined, functions as a fixing heater lamp for an A3 size recording material, for example. Is.

  In this embodiment, the heater lamps 10A and 10B can be arranged in contact with each other or in a state of being extremely close to each other. The member connecting the heater lamps 10A and 10B can be made smaller than the circumscribed circle of the heater lamps 10A and 10B, which contributes to the miniaturization of the lamp unit 100. In addition, since the sealing of the heater lamps 10A and 10B is a shrink seal, the degree of freedom of the position of the chip in the circumferential direction of the heater lamps 10A and 10B in a contacted state or a very close state is improved.

  8 to 10 are perspective views of a schematic configuration, and FIG. 9 is a perspective view for explaining another embodiment of a lamp unit including three rod-shaped heater lamps according to the present invention. FIG. 10 is a side view corresponding to FIG. In addition, the same code | symbol is attached | subjected and demonstrated to the same component as FIG.

  In FIG. 8, the third heater lamp 10 </ b> C has a generally straight tubular bulb 13 c in which shrink seal portions 12 e and 12 f are formed at both ends by sealing under reduced pressure. Inside the bulb 13c, a filament 14d having a length substantially equal to the length of each of the filaments 14a, 14b, 14c of the heater lamps 10A, 10B is disposed so as to extend along the tube axis direction of the bulb 13c. The required inert gas and halogen gas are enclosed in an enclosed amount. On the outer peripheral surface of the valve 13c, a tip 21c which is a residual portion of the gas exhaust introduction pipe protruding about 1 to 5 mm is formed.

  Both end portions of the filament 14d protrude from the end surfaces of the shrink seal portions 12e and 12f via conductive foils 16e and 16f made of, for example, molybdenum, hermetically sealed and embedded in the shrink seal portions 12e and 12f, respectively. Are connected to the external lead rods 17e and 17f that extend.

  The connecting member 113 has large-diameter support holes 18a, 18c, and 18e into which the shrink seal portions 12a, 12c, and 12e are inserted, respectively, and small-diameter support holes 19a and 19c into which the external lead rods 17a, 17c, and 17e are respectively inserted. , 19e are formed. The connecting member 114 has large-diameter support holes 18b, 18d, and 18f into which the shrink seal portions 12b, 12d, and 12f are inserted, respectively, and small-diameter support holes 19b and 19d into which the external lead rods 17b, 17d, and 17f are respectively inserted. , 19f are formed. Further, support portions 201 and 202 are integrally formed with the connecting members 113 and 114.

  In this way, the lamp unit 100 is configured by inserting and fixing the shrink seal portions 12a to 12f of the three heater lamps 10A to 10C to the connecting members 113 and 114, respectively.

  As shown in FIG. 9, the heater lamps 10A to 10C are formed with chips 21a to 21c, which are remaining portions of the gas exhaust introduction pipe, respectively. When the lamp unit 100 is configured as a small one, the valves 13a to 13c are formed. It is necessary to consider the arrangement positions of the chips 21a to 21c in the circumferential direction.

  An arrangement example of the chips 21a to 21c will be described. The chips 21a to 21c in the heater lamps 10A to 10C are preferably arranged so that the valves 13a to 13c are close to each other so as to be within the circumscribed circle Ca of the bulbs 13a to 13c, depending on the chip size. Thus, even if the chips 21a to 21c do not protrude from the circumscribed circle Ca of the bulbs 13a to 13c without interfering with the adjacent heater lamps, even if the chips 21a to 21c do not protrude from the circumscribed circle Ca Thus, the lamp unit can be made smaller. At this time, since the sealing portion is a shrink seal, it is possible to eliminate as much as possible from being influenced by the positions of the chips 21a to 21c, and it is possible to improve the degree of freedom of position change in the circumferential direction.

  FIG. 10 shows a state where the shrink seal portions 12b, 12d, and 12f of the heater lamps 10A to 10C are attached to one connecting member 114.

  As shown in FIG. 10, the height x of the connecting member 112 is lower than the diameter y of the circumscribed circle Ca of the valves 13a to 13c, and the width z of the connecting member 112 is the diameter y of the circumscribed circle Ca of the valves 13a to 13c. Can be made narrower.

  Thus, since the circumscribed circle Cb of the shrink seal portions 12b, 12d, and 12f can be made smaller than the circumscribed circle Ca of the valves 13a to 13c, the connecting member 112 can realize a size that fits within the circumscribed circle Ca. It becomes. The attachment of the other connecting member 113 and the shrink seal portions 12a, 12c, and 12e is the same.

  By the way, the heater lamps 10A to 10C have different heat generation patterns. For example, the heater lamp 10A is configured such that the filament 14a has a heat generating region at the center portion of the bulb 13a, and the heater lamp 10B has the filaments 14b and 14c having heat generating regions at both end portions of the bulb 13b. The heater lamp 10A functions as a fixing heater lamp for an A4 size recording material, for example, and the heater lamps 10A and 10B function as a fixing heater lamp for an A3 size recording material, for example. The heater lamp 10C is used for remaining heat (standby) with a small amount of heat generation.

  FIG. 11 is a side cross-sectional view seen from the bb ′ cross-sectional direction of FIG. 10, and the diameter of the circumscribed circle Ca of the valves 13b and 13c to which the height x of the connecting member 112 (111) is connected also from FIG. It can be seen that it is inside y corresponding to.

  In this embodiment, since the restriction by the sealing portion can be suppressed as much as possible, the heater lamps 10A to 10C can be arranged in a state of being in contact with each other or in a state of being extremely close to each other. The connecting members 113 and 114 for connecting the heater lamps 10A to 10C can be made smaller than the circumscribed circle Ca of the heater lamps 10A to 10C, and contribute to downsizing of the lamp unit 100. Further, since the sealing of the heater lamps 10A to 10C is a shrink seal, the degree of freedom of the chip positions in the circumferential direction of the heater lamps 10A to 10C in a contacted state or a very close state is improved, and the connecting member The workability of attaching 113 and 114 can also be improved.

  Here, the number of heater lamps constituting the lamp unit is not particularly limited, and can be appropriately set according to the purpose. Hereinafter, a lamp unit including four or more heater lamps will be described.

  FIG. 12 is a side view corresponding to FIG. 10 for explaining a lamp unit including four rod-shaped heater lamps according to the present invention.

  In this lamp unit, four rod-shaped heater lamps 10A to 10D are arranged so as to extend in parallel to each other, and a common connecting member 115 (in the drawing) formed of a heat-resistant insulating material at both ends of the heater lamps 10A to 10D. (Only one is shown) and are held together.

  Then, the chips 21a to 21d in the heater lamps 10A to 10D in a contacted state or a very close state are arranged so as to be surrounded by the heater lamps 10A to 10D, respectively.

  In this case, since the chips 21a to 21d are surrounded by the heater lamps 10A to 10D, the entire lamp unit 100 can be reduced in size while using four heater lamps. Furthermore, the size of the connecting member can be realized within the circumscribed circle Ca of the heater lamps 10A to 10D.

  FIG. 13 is a side view showing a modification of the lamp unit of the present invention having four rod-shaped heater lamps.

  This example corresponds to a case where the sizes of the chips 21a to 21d are large and the heater lamps 10A to 10D cannot be brought into contact with or very close to each other. In this case, the chip is sequentially brought into contact with or close to the adjacent heater lamp side. In this example as well, although the chip is located outside the heater lamps 10A to 10D, the lamp unit can be downsized and the connecting member 115 can be downsized.

  FIG. 14 is a side view for explaining a lamp unit of the present invention having five rod-shaped heater lamps.

  In this lamp unit, five rod-like heater lamps 10A to 10E are arranged so as to extend in parallel with each other, and a common connecting member 116 (in the drawing) formed of a heat-resistant insulating material at both ends of the heater lamps 10A to 10E. (Only one is shown) and are held together.

  Then, the chips 21a to 21e in the heater lamps 10A to 10E in a contacted state or a very close state are arranged so as to be surrounded by the heater lamps 10A to 10E, respectively.

  In this case, since the chips 21a to 21e are surrounded by the heater lamps 10A to 10E, the entire lamp unit 100 can be reduced in size while using five heater lamps. Furthermore, the size of the connecting member can be realized within the circumscribed circle Ca of the heater lamps 10A to 10E.

  FIG. 15 is a side view for explaining a lamp unit of the present invention having six rod-shaped heater lamps.

  Six rod-shaped heater lamps 10A to 10F are arranged so as to extend in parallel with each other, and a common connecting member 117 formed of a heat-resistant insulating material at both ends of the heater lamps 10A to 10F (only one is shown in the figure) Are connected and held together.

  In this case as well, the heater lamps 10A to 10F can be rationally arranged without the shrink seal portions 21a to 21f of the six heater lamps 10A to 10F interfering with each other. In addition, since the connecting member 117 for connecting the six heater lamps can be sized to fit within the circumscribed circle Ca of the heater lamps 10A to 10F, the entire lamp unit can be reduced in size.

  By the way, in each of the above-described embodiments, when the chip is surrounded by the heater lamp, if the chip formation position is not the same position in the longitudinal direction of the bulb, there is no room in the space surrounded by the heater lamp without interfering with each other. Is born. For this reason, it becomes easy to set more reliably the state which made the heater lamp contact or the state which made it approach very much.

  16 to 20 are diagrams for explaining an embodiment of the lamp mounting device of the present invention. FIG. 16 is a side view to which the lamp unit 100 in the state of FIG. 6 is mounted, FIG. 17 is a front view of FIG. 18 is an enlarged view of the main part of FIG. 17, FIG. 19 is a perspective view of the main part, and FIG. 20 is a side view seen from the left side of FIG.

  16 to 18, the lamp unit 100 is formed on the chassis 163 using support portions 201 and 202 integrally formed with the connecting members 111 and 112, for example, stainless steel clampers 161 and 162 having elasticity. It attaches to the to-be-attached parts 164,165.

  As shown in FIG. 19, the clampers 161 and 162 include a locking portion 191 engaged with the support portions 201 and 202 and attachment portions 192 and 193 attached to the attachment portions 164 and 165.

  When the mounting portions 192 and 193 are biased in the F1 and F2 directions with the support portions 201 and 202 engaged with the locking portions 191 of the clampers 161 and 162, the locking portions 191 are attached in the F3 and F4 directions. Be forced. As shown in FIG. 20, the urging force in the directions F3 and F4 ensures that the locking portion 191 supports the support portions 201 and 202.

  Further, as shown in FIG. 18, the clampers 161 and 162 can be reliably supported on the mounted portions 164 and 165 by using the force by which the mounting portions 192 and 193 are urged in the arrow direction.

  According to this embodiment, the plurality of heater lamps are connected by a connecting member having a size within a circumscribed circle, and the connecting member is supported on the attached portion by the clamper, and the lamp unit is attached. For this reason, since the connecting member which can be reduced in size and this can be supported by a clamper having a simple structure, the entire system can be reduced in size.

  The connecting member in each embodiment of the lamp unit of the present invention described above has been described by connecting with a connecting member having a size that fits within the circumscribed circle of the plurality of heater lamps. However, the size of the heater lamp and the size of the chip are described. It is also conceivable that the chip and the connecting member become larger than the circumscribed circle. Even in this case, the connecting member can be reduced in size by a combination with a plurality of heater lamps in which the sealing portion is a shrink seal.

  Further, although the clamper is used to attach the connecting member to the chassis, the chassis may have a function of a clamper. In this case, in addition to the reduction in the number of parts, it is possible to save space and to contribute to further downsizing.

  21 to 24 are diagrams for explaining another embodiment of the lamp mounting device according to the present invention. FIG. 21 is a front view showing an enlarged main part, FIG. 22 is a side view of FIG. 21, and FIG. FIG. 24 is an enlarged view of a main part when FIG. 23 is viewed from the left side. In addition, each figure shows the attachment by the side of one connection member, and attaches | subjects and demonstrates the same code | symbol to the component same as the said embodiment.

  In this embodiment, as shown in FIGS. 21 and 22, a V-groove 211 serving as an engaging portion of the clamper is formed on the outer periphery of the support portion 201 formed integrally with the connecting member 111. The V-groove 211 is integrally formed when the support portion 201 is formed.

  Therefore, with the engaging portion 191 of the clamper 161 engaged with the V-groove 211 formed in the support portion 201, the mounting portions 192 and 193 are urged in the F1 and F2 directions as shown in FIG. As a result, the clamper 161 can be reliably supported while urging the locking portion 191 in the F3 and F4 directions and pressing the V-groove 211. As shown in FIG. 23, the clamper 161 can be reliably supported on the mounted portions 164 and 165 by using the force of the biased mounting portions 192 and 193 returning in the arrow direction.

  In the case of this embodiment, in addition to the effects of the above-described embodiment, since the locking portion 191 of the clamper 161 is engaged with the V groove 211 of the support portion 201, it is possible to prevent the heater lamp from shifting in the longitudinal direction. it can.

  Note that the V-groove 211 is not necessarily provided in both support portions, and the clamper may be engaged with the V-groove formed in at least one of them. In this case, for example, a clamper may be attached to a desired position of the support portion on the support portion side where the V-groove is not formed. As in the case where the V-grooves 181 and 182 are formed on both of them, it is possible to perform mounting that is reliably positioned by a simple work process. Moreover, it does not need to be a V-groove and may be a U-shaped groove that protrudes at most. In short, any heater lamp can be used as long as it can prevent or align the longitudinal displacement of the heater lamp.

  The lamp mounting device of the present invention is not limited to the above-described embodiment. As in the case of the V-groove, the heater lamps may be configured so that the clampers 161 and 162 are biased in advance in the directions of arrows Fl and Fr shown in FIG. It is possible to prevent longitudinal displacement and the like.

  FIG. 25 is a schematic diagram for explaining an embodiment of the heating apparatus of the present invention in which toner such as a copying machine is fixed using the lamp mounting apparatus described with reference to FIGS. 16 to 20 to which the lamp unit 100 is mounted. FIG.

  Reference numeral 300 denotes a heating device, and long heating rollers 301 and 302 are arranged opposite to each other on the upper and lower sides. In the heating rollers 301 and 302, the surfaces of aluminum and iron tubular bodies are covered with covering materials 303 and 304 such as silicon rubber and Teflon (registered trademark).

  Further, the lamp unit 100 is disposed on a substantially central axis of the heating rollers 301 and 302 via a support unit (not shown). When the power is connected to a power supply unit (not shown), the lamp unit 100 is energized. Respectively generate heat, and the heating rollers 301 and 302 heat up (heat up).

  The copy paper P on which the toner T has been transferred in a predetermined distribution state from a transfer drum (not shown) is fed between the heated rollers 301 and 302 that are heated in the direction of the arrow to apply the copy paper P and the previous process. The toner T1 thus heated is heated from above and below, and the heated toner T2 is melted and fixed on the copy paper P, and is drawn as a predetermined character or pattern.

  The heating rollers 301 and 302 need not be heating rollers, and one of them may be a pressure roller.

  Next, with reference to FIG. 26, an image forming apparatus according to the present invention will be described in the case of a copying machine equipped with the heating apparatus according to the present invention. In the figure, the part of the heating device 300 is the same as that described above, and the same parts are denoted by the same reference numerals and the description thereof is omitted.

  In FIG. 26, 401 is a housing of the copying machine 400, 402 is a document placing table made of a transparent member such as glass provided on the upper surface of the housing 401, and scans the document P1 by reciprocating in the arrow Y direction.

  An illuminating device 402 including a light irradiation lamp and a reflecting mirror is provided in the upper direction in the housing 401, and a reflected light source from the document P1 irradiated by the illuminating device 402 is a short focus small diameter imaging element. A slit exposure is performed on the photosensitive drum 404 by the array 403. The photosensitive drum 404 rotates in the direction of the arrow.

  Reference numeral 405 denotes a charger that uniformly charges, for example, a photosensitive drum 404 coated with a zinc oxide photosensitive layer or an organic semiconductor photosensitive layer. On the photosensitive drum 404 charged by the charger 405, an electrostatic image subjected to image exposure by the imaging element array 403 is formed. This electrostatic image is visualized by using toner made of a resin that softens and melts when heated by the developing device 406.

  The copy paper P stored in the cassette 407 is fed by a pair of conveying rollers 409 that are rotated in pressure contact with the feeding roller 408 and the image on the photosensitive drum 404 in synchronism with the image on the photosensitive drum 404. Sent to the top. The toner image formed on the photosensitive drum 404 is transferred onto the copy paper P by the transfer discharger 410.

  Thereafter, the paper P that is separated from the photosensitive drum 404 is guided to the heating device 300 by the conveyance guide 411 and subjected to a heat fixing process, and then discharged into the tray 412. After the toner image is transferred, residual toner on the photosensitive drum 404 is removed using a cleaner 413.

  The heating device 300 is longer in the direction perpendicular to the moving direction of the copy paper P than the effective length corresponding to the width (length) of the maximum size paper that can be copied by the copier 400, that is, longer than the width (length) of the maximum size paper. Heating rollers 301 and 302, each having a lamp unit 100 disposed therein, are arranged to face each other. The unfixed toner image T1 on the paper P sent between the heating rollers 301 and 302 is melted by the heat of the lamp unit 100, and characters, alphanumeric characters, symbols, drawings, etc. are formed on the surface of the copy paper P. A copy of the image appears.

  In this embodiment, a heating device having a structure capable of connecting a plurality of lamp heaters having a shrink seal portion sealed by decompression with a small connecting member is used, which contributes to the realization of a miniaturized copying machine. Can do.

  By the way, the lamp unit was used for fixing an image forming apparatus such as a copying machine, but is not limited to this, and is not limited to this. For home appliances, precision equipment for business use or experiment, equipment for chemical reaction, etc. It can be used as a heat source for heating and heat retention.

The perspective view for demonstrating the schematic structure of one Embodiment of the lamp unit of this invention. The side view which shows the arrangement | positioning state when FIG. 1 is seen from a longitudinal direction. The side view of the state which attached the connection member to FIG. FIG. 4A-A ′ sectional view showing a state where a shrink seal portion is attached to one of the connecting members. The front view of the state by which FIG. 1 was assembled. The side view of FIG. Explanatory drawing for demonstrating the heat_generation | fever pattern of a heater lamp. The perspective view for demonstrating the schematic structure of 2nd Embodiment of the lamp unit provided with the three rod-shaped heater lamps concerning this invention. The side view which shows the arrangement | positioning state when FIG. 8 is seen from a longitudinal direction. The side view of the state which attached the connection member to FIG. FIG. 11 is a side cross-sectional view as seen from the b-b ′ cross-sectional direction of FIG. 10. The side view equivalent to FIG. 10 provided with the four rod-shaped heater lamps concerning this invention. The side view for demonstrating the modification of FIG. 12 provided with the four rod-shaped heater lamps. The side view for demonstrating the lamp unit of this invention provided with five rod-shaped heater lamps. The side view for demonstrating the lamp unit of this invention provided with six rod-shaped heater lamps. The side view for demonstrating one Embodiment of the lamp attachment apparatus of this invention. The front view of FIG. The enlarged view of the principal part of FIG. The perspective view of the principal part of FIG. The side view seen from the right side of FIG. The front view which expanded and showed the principal part for demonstrating other embodiment of the lamp attachment apparatus of this invention. The side view of FIG. The principal part enlarged view of FIG. 21 equivalent to FIG. 18 of the state by which the connection member was attached to FIG. The enlarged view of the principal part which looked at FIG. 23 from the left side. 1 is a schematic configuration diagram for explaining an embodiment of a toner fixing device of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory diagram for explaining an embodiment of an image forming apparatus according to the present invention;

Explanation of symbols

100 Lamp units 10A to 10F Heater lamps 111 and 112 Connecting members 12a to 12f Shrink seal portions 13a to 13c Valves 14a to 14d Filaments 16a to 16f Conductive foils 17a to 17f External lead rods 18a to 18f, 19a to 19f Support holes 201, 202 Supporting portions 21a to 21f Chip 161, 162 Clamper 163 Chassis 164, 165 Mounted portion 191 Locking portion 192, 193 Mounting portion 211 V groove 300 Heating device 301, 302 Heating roller 303, 304 Coating material 400 Copying machine

Claims (10)

In a lamp unit comprising a plurality of rod-shaped heater lamps having radiation-transmitting bulbs sealed at both ends, and connecting both ends of these heater lamps by a common connecting member,
Sealing at both ends of the valve is a shrink seal part sealed by reduced pressure,
The connecting unit is a lamp unit, wherein the plurality of lamps are arranged to extend in parallel to each other by connecting the shrink seal portions. In a lamp unit comprising a plurality of rod-shaped heater lamps having a radiation transmissive bulb sealed at both ends, and connecting both ends of these heater lamps by a common connecting member,
Sealing at both ends of the valve is a shrink seal part sealed by reduced pressure,
The connecting member is arranged to connect the shrink seal portion so that the plurality of heater lamps extend in parallel to each other, and has a size within a circumscribed circle in contact with the outer peripheral surface of the plurality of heater lamps. A lamp unit characterized by   The tip which is the remaining portion of the gas exhaust introduction pipe on the outer surface of the bulb of the heater lamp is arranged so as to be close to the partner heater lamp when there are at least three heater lamps. The lamp unit according to 1 or 2.   The tip which is the remaining part of the gas exhaust introduction pipe on the bulb outer surface of the heater lamp is arranged at a position surrounded by other heater lamps when there are four or more heater lamps. 2. The lamp unit according to 2.   5. The lamp unit according to claim 3, wherein the chip is formed at a different position in the longitudinal direction of the heater lamp to avoid contact with the counterpart heater lamp. Introducing wires for power supply are connected to the other ends of the pair of conductive foils, one end of which is connected to each end of the filament inserted into the radiation transmissive bulb, respectively, and the upper portion of the conductive foil at both ends of the bulb, In each heater lamp for sealing,
Sealing at both ends of the valve is a shrink seal part sealed by reduced pressure,
By connecting the shrink seal portions of the plurality of heater lamps with a common connecting member, a lamp unit is obtained,
A lamp mounting device, wherein the connecting member is mounted on a mounted portion using a clamper.   The lamp mounting device according to claim 6, wherein the clamper is mounted on a support portion integrally formed with the connecting member.   The lamp mounting device according to claim 7, wherein an engaging portion for engaging the clamper is formed on the support portion integrally formed with the connecting member. First and second rollers which are arranged one above the other and at least one is heated;
The lamp mounting device according to any one of claims 6 to 8, 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. Forming means for attaching a toner to an electrostatic latent image formed on a medium and transferring the toner to a sheet to form a predetermined image;
An image forming apparatus comprising: the heating device according to claim 9, wherein the toner is fixed by passing a sheet on which an image is formed while being heated and pressed through the first and second rollers. apparatus.

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