JP2006251293A - Flash lamp type fixing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flash lamp type fixing apparatus of a simple constitution making uniform the fixing strength in a width direction of paper in a fixing region. <P>SOLUTION: The flash lamp type fixing apparatus has: a lamp case 11 with a flash lamp 13 and a reflecting plate 12 installed above a fixing region paper guide G2 which guides the bottom surface of the paper P in the fixing region Q2 stored inside; a first blower 16 blowing cooled air to the inside of the lamp case 11 from one end side of the lamp case 11 so that the cooled air is made to flow from one end to the other end in the width direction of the paper around the flash lamp 13 and the reflecting plate 12; and a shielding plate 14 installed on one end side inside the flash lamp case 11 for preventing the cooled air blown from the first blower 16 from directly flowing into around the flash lamp 13, while reducing the temperature difference between two end parts of the flash lamp 13. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a flash lamp type fixing device used in an image forming apparatus such as an electrophotographic printer or a copying machine.

In the flash lamp type fixing device, the temperature rises during continuous light emission. For this reason, it is necessary to cool the flash lamp disposed above the fixing area paper guide in the fixing area and extending in the paper width direction (usually the front-rear direction of the image forming apparatus). As a typical form of the cooling method, one that uses a blower to blow cooling air for cooling the flash lamp is widely known.
Conventionally, cooling air is blown from the front side of the flash lamp (front side of the image forming apparatus) to the rear by the blower, and the cooling air heated around the flash lamp is heated to the rear side (rear side) of the image forming apparatus. Was exhausting from.

The method of cooling the flash lamp type fixing device is a method in which the exhaust air is least intrusive when an operator takes out printed paper, and has been adopted. In this conventional method, the surface temperature of the flash lamp on the side where the cooling air is sent (the air blowing side, that is, the front side of the image forming apparatus) is lowered, but the temperature on the exhaust side (rear side of the image forming apparatus) is raised. . As described above, when the temperature of the air blowing side portion of the fixing region is lowered, there is a problem that the fixing strength of the portion is lowered. If the flash lamp is supplied with energy for securing the fixing strength on the side where the fixing temperature is low, there is a problem that overfixing occurs on the side where the fixing temperature is high.
This consumes wasted energy and generates a large amount of fixing fumes when the toner melts, shortening the life of the air filter for collecting fumes.

A conventional technique for making the temperature in the paper width direction of the flash lamp type fixing device uniform is described in the following Patent Document 1.
(Technique described in Patent Document 1 (Japanese Patent Laid-Open No. 9-80959))
The flash fixing device described in this publication is provided with an air guide cover 56 that forms an air guide path 60 above a space in which the flash lamp 52 and the reflecting plate 53 are accommodated. A plurality of ventilation holes 64 for blowing cooling air are formed in the upper wall 54 a that partitions the space for accommodating the flash lamp 52 and the reflection plate 53 and the air guide path 60. By supplying cooling air from the inlet 58 provided at the downstream end of the air guide path 60 and the plurality of vent holes 64 to the space for accommodating the flash lamp 52 and the reflector plate 53, the sheet of the flash fixing device is used. A technique for making the temperature in the width direction uniform is described.
Japanese Patent Laid-Open No. 9-80959

(Problems of the technique described in Patent Document 1 (Japanese Patent Laid-Open No. 9-80959))
In the technique described in Patent Document 1, the air guide path 60 is provided on the upper side of the space for accommodating the flash lamp 52 and the reflection plate 53, so that the configuration becomes complicated and the flash lamp type fixing device becomes large. There is a point.
In view of the above circumstances, the present invention has the following description (O01) as a technical problem.
(O01) To provide a flash lamp type fixing device that can make the fixing strength in the paper width direction of the fixing region uniform and can be downsized and has a simple configuration.

Next, the present invention devised to solve the above problems will be described. In order to facilitate correspondence with the constituent elements of the embodiments described later, the constituent elements of the present invention are not described. Add the code enclosed in parentheses.
The reason why the present invention is described in correspondence with the reference numerals of the embodiments described later is to facilitate the understanding of the present invention, and not to limit the scope of the present invention to the embodiments.

(Invention)
In order to solve the above problems, the flash lamp type fixing device of the present invention is characterized by comprising the following structural requirements (A01) to (A03).
(A01) A flash lamp (13) disposed above the fixing area sheet guide (G2) for guiding the lower surface of the sheet (P) in the fixing area (Q2) and extending in the front-rear direction which is the sheet width direction; A lamp case (11) that houses therein a reflector (12) that reflects the flash light of the flash lamp (13) toward the fixing area paper guide (G2).
(A02) The lamp case from the one end side of the lamp case (11) so that cooling air flows around the flash lamp (13) and the reflector (12) from one end side to the other end side in the paper width direction. A first blower (16) for blowing cooling air into the interior of (11),
(A03) In order to prevent excessive cooling of the one end side portion of the flash lamp (13) by the cooling air, air is blown from the first blower (16) disposed on the one end side in the flash lamp case. A shielding plate (14) for preventing the cooled cooling air from flowing directly around the flash lamp (13), and reducing the temperature difference between both ends of the flash lamp.

(Operation of the present invention)
In the flash lamp type fixing device according to the present invention having the structural requirements (A01) to (A03), the lamp case (11) has the fixing area sheet guide (G2) for guiding the lower surface of the sheet (P) in the fixing area (Q2). ) And a flash lamp (13) arranged extending in the front-rear direction which is the paper width direction, and the flash light of the flash lamp (13) is reflected toward the fixing area paper guide (G2). The reflector (12) is accommodated inside.
The first blower (16) has the one end of the lamp case (11) such that cooling air flows around the flash lamp (13) and the reflector (12) from one end to the other end in the paper width direction. Cooling air is blown into the lamp case (11) from the side.
In order to prevent excessive cooling of the one end side portion of the flash lamp (13) by the cooling air, the shielding plate (14) disposed on the one end side inside the flash lamp case is provided with the first blower ( The cooling air blown from 16) is prevented from flowing around the one end side of the flash lamp (13), and the temperature difference between both ends of the flash lamp is reduced.
For this reason, since the temperature difference in the front-rear direction of the flash lamp (13) is reduced, the variation in emission energy is reduced. For this reason, the variation in the fixing temperature is reduced over the entire area in the front-rear direction of the fixing area (Q2).
For this reason, the fixing strength in the sheet width direction of the sheet (P) passing through the fixing region (Q2) can be made uniform.

(Embodiment 1 of the present invention)
The flash lamp type fixing device according to Embodiment 1 of the present invention is characterized in that, in the present invention, the following structural requirement (A04) is provided.
(A04) A second blower (17) for blowing the air blown by the first blower (16) from the other end side in the paper width direction toward the one end side, and the fixing area paper guide (G2). The second blower (17) that exhausts air toward the lower surface of the one end side.

(Operation of Form 1 of the Present Invention)
In the flash lamp type fixing device according to the first embodiment of the present invention having the structural element (A04), the second blower (17) is configured to send the air blown by the first blower (16) to the other end in the paper width direction. Air is blown from the side toward one end. The air blown by the second blower (17) is exhausted toward the lower surface on the one end side of the fixing area paper guide (G2).

(Embodiment 2 of the present invention)
The flash lamp type fixing device according to the second embodiment of the present invention is characterized in that the flash lamp type fixing device according to the first embodiment of the present invention has the following structural requirements (A05).
(A05) The second blower (17) arranged so as to exhaust substantially parallel to the fixing area paper guide (G2).

(Operation of Embodiment 2 of the present invention)
In the flash lamp type fixing device according to the second embodiment of the present invention having the structural requirement (A05), the second blower (17) exhausts substantially parallel to the fixing area paper guide (G2). In this case, arrangement and attachment of the second blower (17) are facilitated.

(Embodiment 3 of the present invention)
The flash lamp type fixing device according to the third embodiment of the present invention is characterized in that the flash lamp type fixing device according to the first embodiment or the second embodiment of the present invention has the following constituent (A06).
(A06) The second blower capable of changing an exhaust direction.

(Operation of Form 3 of the Present Invention)
In the flash lamp type fixing device according to the third embodiment of the present invention having the structural requirement (A06), the second blower (17) may change the direction of the air exhausted by the second blower (17). it can. For this reason, fine adjustments can be made according to the difference in model at the time of manufacturing the image forming apparatus, the use environment of the user, and the like.

The above-described flash lamp type fixing device of the present invention has the following effect (E01).
(E01) It is possible to provide a flash lamp type fixing device having a simple structure and capable of making the fixing strength of the fixing area in the paper width direction uniform.

Next, specific examples (examples) of the embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited to the following examples.
In order to facilitate understanding of the following description, in the drawings, the front-rear direction is the X-axis direction, the left-right direction is the Y-axis direction, the up-down direction is the Z-axis direction, and arrows X, -X, Y, -Y, The direction indicated by Z and -Z or the indicated side is defined as the front side, the rear side, the right side, the left side, the upper side, the lower side, or the front side, the rear side, the right side, the left side, the upper side, and the lower side, respectively.
In the figure, “•” in “○” means an arrow heading from the back of the page to the front, and “×” in “○” is the front of the page. It means an arrow pointing from the back to the back.

(Example 1)
FIG. 1 is an explanatory diagram of an image forming apparatus provided with a continuous sheet conveying device with feed holes according to a first embodiment of the present invention.
In FIG. 1, a printer U that uses continuous paper with feed holes as an image forming apparatus is supported on a printer support surface PS. A UI (user interface) is provided on the upper right side of the printer U. The UI (user interface) is provided with a power switch, a display, a density adjustment switch, etc. (not shown). A board accommodating portion S for accommodating a control board (not shown) is provided at the right end under the UI.
On the left side of the board housing portion S, a drum-shaped photoconductor PR is rotatably supported. A transfer roll Tr is disposed above the photoconductor PR. Around the photoconductor PR, the transfer roll Tr, the cleaner CL, the charger (charge corotron) CC, and the developing device D are arranged along the rotation direction.
A transfer corotron can be used instead of the transfer roll Tr, and a charging roll can be used instead of the charger (charge corotron) CC.

The photosensitive member PR, the transfer roll Tr, the cleaner CL, the charger CC, and the developing device D are supported on a movable table 1 that can move in the front-rear direction (direction perpendicular to the screen in FIG. 1, X-axis direction). . A ROS (latent image forming apparatus) is disposed below the moving table 1. A power supply circuit E is disposed below the ROS (latent image forming apparatus).
The surface of the rotating photoconductor PR is uniformly charged by a charger CC, and the charged photoconductor PR surface is electrostatically latent imaged by a laser beam L emitted from the ROS (latent image forming apparatus). Is formed. The electrostatic latent image on the surface of the photoreceptor PR is developed into a toner image by the developing device D. The toner image on the surface of the photoconductor PR is conveyed to a transfer region Q1 facing the transfer roll Tr.

  The printer U has a continuous paper storage unit TR1 for storing continuous paper P with feed holes. The continuous paper P with feed holes stored in the continuous paper storage unit TR1 is transported by tractor units (paper transport members) K1, K2, and K3 for paper transport and guide rolls R and R. The transfer roll Tr transfers the toner image on the surface of the photoreceptor PR to the continuous paper P with feed holes when the continuous paper P with feed holes passes through the transfer region Q1. The tractor units K1, K2, and K3 for paper conveyance are configured in substantially the same manner.

(Paper transport tractor unit)
2A and 2B are explanatory diagrams of a tractor unit for conveying paper, FIG. 2A is a perspective view of the tractor unit that conveys continuous paper, and FIG. 2B is an explanatory diagram of the tractor unit as seen from the line IIB-IIB in FIG. It is.
In FIG. 2A, the continuous paper P with feed holes is formed with fold lines (portions where small holes (or slits or the like are formed along a straight line) Pa every time they are separated by a predetermined distance in the paper transport direction. Further, feed holes Pb are formed on both sides of the continuous paper P with feed holes in the paper width direction at regular intervals a along the paper transport direction and at the same position in the paper transport direction.

In FIG. 2A, a pair of front and rear tractor units K1 and K1 disposed apart in the paper width direction (X-axis direction, that is, the front-rear direction) are supported by a fixed shaft S0 extending in the paper width direction. The front (X side) tractor unit K1 in the pair of front and rear tractor units K1, K1 is fixedly supported by the fixed shaft S0. The rear (−X side) tractor unit K1 is slidably and fixedly supported on the fixed shaft S0, and its position is adjusted on the fixed shaft S0 in accordance with the width of the continuous paper used.
Each tractor unit K1, K1 has a guide frame 2. Bearings 3 and 4 are mounted on the guide frame 2, and the tractor shafts S 1 and S 2 are supported by the bearings 3 and 4 so as to be rotatable with respect to the guide frame 2.

  Timing pulleys 5 and 6 are mounted on the tractor shafts S1 and S2, respectively. The guide frame 2, the bearings 3 and 4, and the timing pulleys 5 and 6 constitute belt support members (2 to 6) that rotatably support the pin belt 7. 2A and 2B, a plurality of tractor pins 7a are provided on the outer periphery of the pin belt 7 at regular intervals a. The tractor pin 7a can be fitted into the feed hole Pb.

  The tractor shaft S1 is configured such that a rotational force is transmitted from a rotation driving member (not shown). When the tractor shaft S1 rotates, timing pulleys (belt drive members) 5 (see FIG. 2B) mounted on both ends of the paper width direction rotate. As the timing pulley 5 rotates, the pin belt 7 and the timing pulley 6 on both sides in the sheet width direction also rotate. When the pin belt 7 rotates while the tractor pin 7a is fitted in the feed hole Pb, the continuous paper P with feed holes is transported in the paper transport direction.

In FIG. 1, the continuous paper P with feed holes onto which the toner image has been transferred in the transfer area Q1 is guided by the paper guide G1 and conveyed to the fixing area Q2. In the fixing area Q2, a plate-shaped fixing area paper guide G2 for guiding the lower surface of the paper is arranged, and the toner image on the continuous paper P with feed holes conveyed along the fixing area paper guide G2 is flashed. The flash lamp type fixing device F used is irradiated with fixing light and fixed by heating.
The continuous paper P with a feed hole on which the toner image is heated and fixed by the flash lamp type fixing device F when passing through the fixing region Q2 sequentially passes between the pair of left and right guide bars Rb and Rb and the paper guide members G3 and G3. The sheet is conveyed to the lower continuous sheet stack tray device TR2.

(Flash lamp type fixing device F)
3 is an explanatory view of the fixing device shown in FIG. 1, FIG. 3A is a plan view of a fixing area paper guide, and FIG. 3B is a sectional view taken along line IIIB-IIIB in FIG. 3A.
1 and 3, a lamp case 11 is arranged above the plate-shaped fixing area paper guide G2 in parallel with the fixing area paper guide. A heat resistant glass portion 11 a is provided on the lower surface of the lamp case 11.
A reflector 12 is accommodated inside the lamp case 11, and a flash lamp 13 is accommodated inside the reflector 12. An end wall 12a is provided at each of the front end and the rear end of the reflecting plate 12, and a ventilation hole 12b for passing cooling air is formed in each end wall 12a.
Inside the lamp case 11, a shielding plate 14 is disposed on the rear side of the end wall 12 a at the front end of the reflecting plate 12. The shielding plate 14 prevents cooling air blown from a first blower 16 to be described later from flowing directly around the flash lamp 13 from the ventilation port 12b, and the rear end side of the flash lamp 13 due to the cooling air. It is a member for preventing excessive cooling of a part.
The flash light from the flash lamp 13 passes through the heat-resistant glass portion 11a and is applied to the sheet P passing through the fixing region Q2.

A first blower 16 having an exhaust port 16b for exhausting the cooling air sucked from the air intake port 16a into the lamp case 11 is disposed on the rear side (back side of the image forming apparatus) of the fixing region paper guide G2. Yes. Further, on the front side of the fixing area paper guide G2 (the front side of the image forming apparatus), an intake port 17a that sucks air from the lamp case 11 and a gas sucked from the intake port 17a are discharged below the fixing area paper guide G2. The 2nd air blower 17 provided with the possible exhaust port 17b is arrange | positioned.
In the first embodiment, the first blower 16 and the second blower 17 use a blower having the same configuration. For this reason, an increase in the types of parts of the flash lamp type fixing device is prevented.

The cooling air blown into the rear part of the lamp case 11 collides with the shielding plate 14 and then flows to the front side of the lamp case 11 through the outer periphery of the shielding plate 14. The cooling air passes through the outside and inside of the reflector 12 and flows to the front side (X side) to cool the inside and outside of the reflector 12.
The cooling air passing through the reflector 12 flows around the flash lamp 13 to cool the flash lamp 13.
The amount of each of the cooling air flowing through the outer side and the inner side of the reflecting plate depends on the shape and arrangement of the shielding plate 14 and the shape and arrangement of the vent hole 12b formed on the end wall 12a of the reflecting plate 12. Adjustable. In this embodiment, the ratio of the amount of air flowing outside the reflector and the amount of air flowing inside is set to about 4: 1.

Since the cooling air is shielded by the shielding plate 14, the cooling air flowing outside the reflecting plate 12 is applied to the outer surface of the reflecting plate 12 adjacent to the shielding plate 14 (the outer surface on the upstream side of the reflecting plate 12). It is difficult to flow in contact. For this reason, when the shielding plate 14 is provided, the outer surface on the upstream side of the reflecting plate 12 is less likely to be cooled than when the shielding plate 14 is not provided. For this reason, it can prevent that the upstream part (rear part) of the reflecting plate 12 is cooled too much compared with a downstream part (front part).
Further, since the cooling air is shielded by the shielding plate 14, the wind speed is low in the region immediately after the shielding plate 14 inside the lamp case 11. For this reason, the part (upstream part (rear part) of the reflector 12 and the flash lamp 13) disposed immediately after the shielding plate 14 of the reflector 12 is excessively cooled by the high-speed cooling air. Can be prevented.

  The temperature of the cooling air flowing from the rear side to the front side of the lamp case 11 is rising. The cooling air whose temperature has risen is sucked from the air inlet 11a of the second blower 17 and blown out below the fixing area paper guide G2. The cooling air blowing direction in which the temperature has increased is such that the cooling air blown below the fixing area paper guide G2 (cooling air having an increased temperature) heats the lower surface of the rear portion of the fixing area paper guide G2. Be blown out to do. The cooling air blown out to heat the lower surface of the rear portion of the fixing area paper guide G2 (cooling air whose temperature has increased) is an air filter that recovers fixing fumes generated when the toner melts, deodorizes, and removes smoke. Is exhausted to the back of the image forming apparatus.

(Operation of Example 1)
In the flash lamp type fixing device F according to the first embodiment having the above-described configuration, the surface temperature of the flash lamp 13 on the first blower 16 side (the rear side of the image forming apparatus) into which the cooling air is sent is lowered by the cooling air. Since the temperature of the cooling air rises as it goes to the second blower 17 side (the front side of the image forming apparatus), the temperature of the second blower 17 side portion (front side portion) of the flash lamp 13 is higher than that of the rear side portion. Get higher. In this case, when the temperature on the first blower 16 side (rear side) of the fixing area Q2 is lower than the temperature on the second blower 17 side (front side), the toner on the first blower 16 side of the paper passing through the fixing area Q2 is reduced. There is a risk of fixing failure.

FIG. 4 is an explanatory view of an experimental result for explaining the action of the shielding plate of the flash lamp type fixing device shown in FIG. 3, FIG. 4A is a view showing a fixing region and a temperature measurement place, and FIG. 4B is a view showing 4A. It is a table | surface which shows the measurement temperature of a temperature measurement location.
In FIG. 4A, the temperature measurement location immediately after the shielding plate 14 is a, the temperature measurement location in the center of the fixing region Q2 is b, and the temperature measurement location in the rear end portion (downstream end portion of the cooling air) of the fixing region Q2 is c. And
When only the first blower 16 of the flash lamp type fixing device F of FIG. 3 was used to measure the temperatures of the temperature measurement points a, b, and c shown in FIG. 4A, the result shown in FIG. 4B was obtained. .

4B, in the case of Example 1 in which the shielding plate 14 is provided, the temperature Ta at the upstream end a of the cooling air in the fixing region Q2 is Ta = 250 ° C., and the temperature Tb at the central portion b of the fixing region Q2 is Tb. = 268.8 ° C. The temperature Tc at the downstream end c of the cooling air is Tc = 276.5 ° C.
Therefore, in the case of Example 1 in which the shielding plate 14 is provided, the temperature difference ΔT = | Ta−Tc | = 26.5 ° C. between the upstream end and the downstream end of the cooling air in the fixing region Q2.
4B, in the case of the prior art in which the shielding plate 14 is not provided, the temperature Ta at the upstream end a of the cooling air in the fixing region Q2 is Ta = 228.8 ° C., and the temperature at the central portion b of the fixing region Q2. Tb is Tb = 265.4 ° C., and the temperature Tc at the downstream end c of the cooling air is Tc = 281.5 ° C.
Therefore, in the case of the prior art in which the shielding plate 14 is not provided, the temperature difference ΔT = | Ta−Tc | = 52.7 ° C. between the upstream end and the downstream end of the cooling air in the fixing region Q2.
From the experimental results shown in FIG. 4B, the variation in the temperature of the fixing region Q2 can be reduced in the first embodiment in which the shielding plate 14 is provided, compared to the conventional technique in which the shielding plate 14 is not provided.

  In the first embodiment, the cooling air whose temperature has increased is sucked by the second blower 17 and blown to the lower surface of the fixing area paper guide G2 on the first blower 16 side (rear side). For this reason, the cooling air blown to the lower surface of the rear portion of the fixing area paper guide G2 and heated to heat the lower surface of the first fan 16 side portion (rear side portion) of the fixing area paper guide G2. Further, it is possible to prevent the occurrence of fixing failure on the first blower 16 side (rear side). Therefore, the temperature distribution in the fixing region Q2 can be made more uniform.

4 is a graph showing the fixing area temperature distribution in the paper width direction of the fixing area, FIG. 4A is the fixing area temperature distribution of Example 1, and FIG. 4B is the fixing area temperature distribution of the prior art.
In the graph of FIG. 4, the horizontal axis represents the position of the flash lamp 13 in the front-rear direction, and the vertical axis represents the fixing temperature.
In FIG. 4A, the fixing area temperature distribution in the sheet width direction of the fixing area Q2 of the first embodiment is made uniform in the sheet width direction (front-rear direction). Therefore, the fixing device according to the first exemplary embodiment of the present invention can appropriately perform the heat fixing of the toner image over the entire fixing region Q2.
In FIG. 4B, in the conventional fixing device, the cooling air is sent from the front side of the fixing region Q2 (the front side of the flash lamp 13) and exhausted from the back side of the flash lamp 13 to the outside of the image forming apparatus. For this reason, the front side is cooled compared to the back side of the flash lamp 13, so that the fixing temperature in the fixing region Q2 rises toward the rear side, and a uniform toner image in the entire fixing region Q2. Cannot be fixed by heating.

(Example of change)
As mentioned above, although the Example of this invention was explained in full detail, this invention is not limited to the said Example, A various change is performed within the range of the summary of this invention described in the claim. It is possible. Modified embodiments of the present invention are illustrated below.
(H01) In the first embodiment, the second blower 17 can be omitted.
(H02) The number of flash lamps 13 arranged in the lamp case 11 can be arbitrarily set.

FIG. 1 is an explanatory diagram of an image forming apparatus provided with a continuous sheet conveying device with feed holes according to a first embodiment of the present invention. 2A and 2B are explanatory diagrams of a tractor unit for conveying paper, FIG. 2A is a perspective view of the tractor unit that conveys continuous paper, and FIG. 2B is an explanatory diagram of the tractor unit as seen from the line IIB-IIB in FIG. It is. 3 is an explanatory view of the fixing device shown in FIG. 1, FIG. 3A is a plan view of a fixing area paper guide, and FIG. 3B is a sectional view taken along line IIIB-IIIB in FIG. 3A. 4 is a graph showing the fixing area temperature distribution in the paper width direction of the fixing area, FIG. 4A is the fixing area temperature distribution of Example 1, and FIG. 4B is the fixing area temperature distribution of the prior art.

Explanation of symbols

11 ... Lamp case,
12 ... reflector,
13 ... Flash lamp,
14 ... shielding plate,
16 ... 1st blower,
G2: Fixing area paper guide,
P ... paper,
Q2: Fixing area.

Claims (4)

A flash lamp type fixing device having the following constitutional requirements (A01) to (A03);
(A01) A flash lamp arranged above the fixing area paper guide for guiding the lower surface of the paper in the fixing area and extending in the paper width direction, and the flash light of the flash lamp is reflected toward the fixing area paper guide. A lamp case (A02) for housing a reflecting plate to be operated from the one end side of the lamp case so that cooling air flows around the flash lamp and the reflecting plate from one end side to the other end side in the paper width direction. A first blower for blowing cooling air into the lamp case;
(A03) In order to prevent excessive cooling of the one end side portion of the flash lamp by the cooling air, the cooling air that is disposed on the one end side inside the flash lamp case and blown from the first blower is directly A shielding plate for preventing the flash lamp from flowing into the periphery of the flash lamp and reducing a temperature difference between both ends of the flash lamp. The flash lamp type fixing device according to claim 1, comprising the following structural requirements (A04):
(A04) A second blower for blowing the air blown by the first blower from the other end side in the paper width direction toward one end side toward the lower surface of the fixing region paper guide toward the one end side. The second blower for exhausting. The flash lamp type fixing device according to claim 2, comprising the following structural requirements (A05):
(A05) The second blower arranged to exhaust substantially parallel to the fixing area paper guide. The flash lamp type fixing device according to claim 2 or 3, further comprising the following constituent (A06):
(A06) The second blower capable of changing an exhaust direction.

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