JP2001289579A - Heat pipe type heat circulator and method of manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat pipe type heat circulator having an excellent heat transfer efficiency at a low cost and to prevent generation of an undue stress in a heat pipe. SOLUTION: A hear receiving section 11 and a heat radiating section 12 are made of a planar metallic member and a plurality of heat pipes 13 closed annularly are secured to the hear receiving section and the heat radiating section by bending projections 13a standing on the metallic member around the heat pipe 13. The thickness is set appropriately between the parts of the planar metallic member secured with the heat pipe thus regulating transfer of heat. Furthermore, a curved part or an elongating/contracting part is provided between positions of the heat pipe secured, respectively, to the hear receiving section and the heat radiating section thus allowing relative displacement between the hear receiving section and the heat radiating section.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat circulator using a heat pipe, and more particularly to a heat pipe type heat radiator suitable for transferring heat between a high-temperature belt-like member and a low-temperature belt-like member. Regarding circulatory organs.

[0002]

2. Description of the Related Art A heat circulator using a heat pipe is used in various fields, and is used not only for heat exchange between fluids but also for heat exchange between solids. For example, when heating is performed in a certain range of the endless belt driven around and cooled in another range, heat is circulated between predetermined positions of the belt to improve the efficiency of heating and cooling. Is considered.

FIG. 10 is a schematic diagram showing the configuration of an image forming apparatus using an endless belt heated and cooled as an intermediate transfer member. This image forming apparatus forms an image by selectively adhering toner, which is a colored powder, to a latent image due to a difference in electrostatic potential, and forms an image with an image forming unit 102 that forms a toner image and is driven to rotate. Endless belt, on which the formed toner image is temporarily transferred.
03, a drive roll 104 for stretching the intermediate transfer body and applying a driving force to the intermediate transfer body, and the intermediate transfer body 103 and a toner image carried thereon while stretching the intermediate transfer body 103. Heating roll 105 for heating T
And a heating / pressing roll 106 for heating and pressurizing a sheet 112 conveyed from a sheet tray 109 with a heating roll 105 by superimposing the sheet 112 on the intermediate transfer body 103. In the drawing, reference numeral 107 denotes a support roll for the intermediate transfer member, reference numeral 108 denotes a cleaning roll, and reference numeral 111 denotes a cleaning roll.
Is a paper transport belt, reference numeral 113 is a discharge tray for discharging the paper on which the image is transferred, reference numeral 114 is a fan for cooling the intermediate transfer member, and reference numerals 115 and 116 are built in the heating roll 105 and the heating and pressing roll 106, respectively. The halogen lamp is a heat source.

In this image forming apparatus, the toner image T formed by the image forming unit 102 is electrostatically transferred to the intermediate transfer body 103, and is conveyed as the intermediate transfer body 103 moves around. Then, the toner image is heated and melted at a position along the peripheral surface of the heating roll 105, is superposed on the sheet 112 as a recording medium, and is pressed between the heating roll 105 and the heating and pressing roll 106. Thereby, the fused toner image is transferred and fixed on the sheet. The sheet on which the toner image has been transferred and fixed is cooled, separated from the intermediate transfer body 103, and sent to the sheet discharge tray 113.

In the above process, the intermediate transfer member 1
03 is heated at a position where it comes into contact with the peripheral surface of the heating roll 105, and is cooled after the transfer and fixing of the toner image are completed. Then, at a position facing the image forming unit 102, it is necessary to cool the toner to a temperature lower than the melting temperature of the toner. That is, if the toner in the image forming unit 102 is melted, normal image formation is impaired. For example, the image bearing drum (not shown) and the developing device (not shown) in the image forming unit are not excessively heated. Like that.

As described above, the toner is cooled after being heated by the heating roll 105, and is reheated after a new toner image is transferred, so that heating and cooling are repeated every time the intermediate transfer body 103 rotates. Will be returned. For this reason, use of a heat circulator 101 for transferring heat between the downstream side and the upstream side of the heating roll 105 of the intermediate transfer body 103 has been proposed. In the apparatus described in Japanese Patent Application Laid-Open No. H10-213977, A heat pipe type heat circulator as shown in FIG. 11 is used.

The heat circulator includes a plurality of heat pipes 123 arranged in the moving direction of the intermediate transfer member 103, and metal members 131 and 132 fixed to a heat receiving portion and a heat radiating portion of each heat pipe 123. The main part is constituted by a plurality of metal members 131 and 132 arranged in parallel, and is connected to an adjacent metal member via a heat insulating spacer 134. Then, the intermediate transfer member 10 which is an endless belt
The connected body of the metal member contacts the upstream side and the downstream side of the third heating roll 105, and transfers heat from the downstream side of the heating roll 105 to the upstream side.

At this time, the intermediate transfer member 103 that contacts the heat receiving unit 121 on the downstream side of the heating roll 105
Since the heat is absorbed by the intermediate transfer member 103, the temperature decreases toward the downstream side, and the temperature of the metal member of the heat receiving portion also decreases from the upstream side 131a to the downstream side 131b. On the other hand, in the heat radiating portion 122 that contacts the upstream side of the heating roll 105, heat is supplied to the intermediate transfer member, and the temperature of the metal member 132b on the downstream side is increased.
And, since these metal members arranged in parallel are thermally insulated, good heat exchange efficiency is maintained.

[0009]

However, the conventional heat pipe type heat circulator as described above has the following problems. In the related art, since the metal members are connected via the heat insulating spacer, it is difficult to manufacture the metal members with sufficient mechanical strength, which is an obstacle to cost reduction. In addition, in order to perform efficient heat exchange by contacting the moving belt-shaped member, the contact surface must be finished to a highly accurate curved surface with little unevenness, but a step is easily formed between the connected metal members. Therefore, a lot of cost is required to manufacture the device with high accuracy. Further, it becomes difficult to maintain the shape of the portion where heat exchange is performed. Furthermore, it is necessary to set the position of the contact surface accurately, and it is also required to have a structure that facilitates setting at the time of attachment or a structure that can absorb thermal expansion when heated.

The present invention has been made in view of the above circumstances, and an object of the present invention is to form a high-precision smooth curved surface in a heat exchanging section, to have excellent heat transfer efficiency,
To provide a heat pipe type heat circulator that can be manufactured at low cost, or to be able to be accurately installed in a predetermined position, and at the time of installation and after installation,
An object of the present invention is to provide a heat pipe type heat circulator capable of preventing generation of excessive stress in a heat pipe.

[0011]

In order to achieve the above object, the present invention according to claim 1 comprises a heat receiving portion made of a plate-shaped metal member and arranged so as to contact a high-temperature member;
A heat dissipating portion made of a plate-like metal member and arranged so as to be in contact with the low-temperature member; and a plurality of heat pipes fixed to both the heat receiving portion and the heat dissipating portion and having an annular closed shape. The metal member of the heat receiving portion or the metal member of the heat radiating portion has, on one surface, a plurality of pairs of parallelly erected projections, and the heat pipe is a pair of the projections. The heat pipe-type heat circulator is provided such that the protrusion is bent so as to be wound around the heat pipe and fixed.

In the above configuration, the high-temperature member and the low-temperature member may be relatively high or low temperature. That is,
It suffices if there is a temperature difference between the two that allows heat exchange,
It means high temperature for low temperature members and low temperature for high temperature members, and is not limited to a specific temperature range. Further, both members are desirably sheet-shaped members made of cloth, paper, synthetic resin, or the like, but may be solid, elastic, fluid, or members that undergo plastic deformation.

In such a heat pipe type heat circulator,
Since the heat receiving portion and the heat radiating portion are each formed of one plate-shaped metal member, it is easy to form a contact surface with a high-temperature member or a low-temperature member performing heat exchange with high accuracy and smoothness. This makes it possible to manufacture a device with good heat exchange efficiency at low cost. In addition, when a temperature difference occurs between the positions where the plurality of heat pipes are fixed, by appropriately selecting the thickness of the metal member, it is possible to restrict the movement of heat and maintain the temperature difference. This enables efficient heat transfer.

Further, the heat pipe can be easily fixed by bending the protruding piece, so that the manufacturing process can be simplified and the cost can be reduced.

The invention according to claim 2 is arranged so as to contact a high-temperature member, a heat-receiving portion to which heat moves from the high-temperature member, and a heat-receiving portion to contact the low-temperature member.
A heat radiating unit that supplies heat to the low-temperature member, and a plurality of heat pipes that are fixed to both the heat receiving unit and the heat radiating unit and have an annular closed shape, Provided is a heat pipe-type heat circulator having a curved portion between a portion fixed to the heat receiving portion and a portion fixed to the heat radiating portion, which allows a relative displacement between the heat receiving portion and the heat radiating portion. I do.

In this heat pipe type heat circulator, the heat pipe has a curved portion between the heat receiving portion and the heat radiating portion, and the heat receiving portion and the heat radiating portion are easily deformed by the curved portion. Are allowed. Therefore,
It becomes easy to fix the heat receiving section and the heat radiating section at accurate positions. Further, after fixing the heat receiving portion and the heat radiating portion, the temperature of the heat pipe changes, and even if the heat expansion and contraction occurs, the heat pipe is absorbed by the deformation of the curved portion, and it is possible to prevent the heat pipe from generating excessive stress. .

According to a third aspect of the present invention, there is provided a heat receiving portion in which heat is transferred from the high-temperature member, and a heat-receiving portion in which heat moves from the high-temperature member;
A heat radiating unit that supplies heat to the low-temperature member, and a plurality of heat pipes that are fixed to both the heat receiving unit and the heat radiating unit and have an annular closed shape, A tube wall expands spirally or annularly between a portion fixed to the heat receiving portion and a portion fixed to the heat radiating portion, and a telescopic portion allowing relative displacement between the heat receiving portion and the heat radiating portion. A heat pipe type heat circulator having the following.

In this heat pipe type heat circulator, the tube wall of the heat pipe has a helically or annularly expanded and contracted portion, and the tube wall easily expands and contracts by deformation of the tube wall.
The heat receiving portion and the heat radiating portion can be easily fixed at predetermined positions. Further, after fixing, expansion and contraction due to temperature change can be absorbed.

According to a fourth aspect of the present invention, in the heat pipe type heat circulator according to the first, second or third aspect, the high-temperature member and the low-temperature member are the heat-receiving members of the heat pipe. A part or a belt-like member that moves in a direction substantially perpendicular to a part fixed to the heat-radiating part, and a surface of the heat-receiving part and the heat-radiating part that comes into contact with the belt-like member,
The belt-shaped member has a curved surface in the moving direction.

In this heat pipe type heat circulator, since the portions of the heat receiving portion and the heat radiating portion which come into contact with the belt-shaped member are curved surfaces, the moving belt-shaped member is brought into almost uniform contact with the heat receiving portion or the heat radiating portion. Heat transfer can be effectively performed. Further, the contact surfaces of the heat receiving portion and the heat radiating portion with the belt-shaped member can be finished smoothly, and efficient heat exchange is performed.

According to a fifth aspect of the present invention, in the heat pipe heat circulator according to any one of the first, second, and third aspects, the high-temperature member and the low-temperature member are the heat receiving portion of the heat pipe. Or, it is one endless belt that moves in a direction substantially perpendicular to the portion fixed to the heat radiating portion and is driven to rotate, and the heat receiving portion is located at a position where the toner image carried on the endless belt is heated and melted. A downstream side, which is in contact with the endless belt at a position upstream of a position where a toner image is newly transferred onto the endless belt; It is assumed that the belt is in contact with the endless belt on the downstream side of the position where the toner image is transferred and on the upstream side of the position where the toner image is heated and melted.

In this heat circulator, the heat receiving section contacts the endless belt heated to melt the toner image, absorbs heat to cool the endless belt, and moves the absorbed heat to the heat radiating section. I do. The heat dissipating portion contacts the upstream side of the heated position of the endless belt and supplies heat to the endless belt. This makes it possible to efficiently perform the heating and cooling associated with the circular drive of the endless belt. In the heat receiving section, the temperature is high on the upstream side in the moving direction of the endless belt, and the temperature decreases on the downstream side. On the other hand, in the heat radiating portion, the temperature increases as going from the upstream side to the downstream side.
Then, the heat pipe fixed to the most upstream side of the heat receiving section is fixed to the most downstream side of the heat radiating section, and the heat pipe fixed to the downstream side of the heat receiving section is fixed to the upstream side of the heat radiating section.
As a result, the temperature difference between the heat exchange sections of each heat pipe becomes substantially the same, and efficient heat transfer is performed. The metal member forming the heat receiving portion or the heat radiating portion has a small plate thickness between the positions where the heat pipes are fixed, so that heat transfer is small, and a state where a temperature difference is generated is maintained.

According to a sixth aspect of the present invention, two plate-shaped metal members having a plurality of pairs of protruding pieces which are erected in parallel and formed in parallel are formed on one surface, and are formed into an annularly closed shape. A pipe is formed, and the heat pipe is fitted between the pair of projecting pieces of both of the plate-shaped metal members arranged in parallel, and bent so as to wind the projecting piece around the heat pipe. Accordingly, a method for manufacturing a heat pipe type heat circulator for fixing the heat pipe and two metal members is provided.

According to this method, since the heat receiving portion and the heat radiating portion can be formed as one plate-like member, the number of processing steps can be reduced. Further, the heat pipe is fitted between a pair of projecting pieces provided on the plate-shaped metal member, and the projecting piece can be bent and easily fixed to the heat receiving portion or the heat radiating portion. Therefore, it is possible to reduce the manufacturing cost of the heat pipe type heat circulator. The heat pipe is configured to inject a working fluid and adjust the internal pressure after processing the pipe into a closed shape. The step of injecting the working fluid and the step of adjusting the internal pressure are desirably performed before fixing to the heat receiving portion and the heat radiating portion, but may be performed after the fixing.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic perspective view showing a heat pipe type heat circulator according to an embodiment of the present invention. FIG. 2 is a side view and a front view of the same heat pipe type heat circulator, and FIG. 3 is a plan view. The heat pipe type heat circulator 1 includes a heat receiving portion 11 arranged to contact a high temperature member, a heat radiating portion 12 arranged to contact a low temperature member, the heat receiving portion 11 and the heat radiating portion. The main part is constituted by a plurality of heat pipes 13 which are fixed to both sides of the heat pipe 12 and have an annular closed shape.

As shown in FIG. 4, the heat dissipating portion 12 is made of a plate-like metal member, and has a curved surface formed on the surface side for contact with a member for exchanging heat. On the back side, a protruding piece 12a for attaching the heat pipe 13 is provided.
Are provided. The protruding pieces 12a are erected in parallel in pairs, and are continuous in the axial direction of the heat pipe 13 to be attached, and have a uniform cross section. The center line of each pair of projecting pieces is equally spaced, and the heat pipe 13 is fitted between these paired projecting pieces 12a and fixed so as to embrace them. I have. Further, between the positions where the heat pipes 13 are fixed, the plate thickness t is adjusted to an appropriate value, so that the movement of heat is restricted.

On the other hand, the heat receiving portion 11 is made of substantially the same metal member as the heat dissipating portion 12, and its upper and lower surfaces are reversed.
2 are arranged diagonally below.

The heat dissipating portion 12 and the heat receiving portion 11 can be made of a metal having good thermal conductivity such as aluminum or copper or an alloy containing them, but is inexpensive and has excellent workability. Preferably, extruded profiles are used.

The heat pipe 13 is made of a pipe material such as copper or a copper alloy, and is made of straight pipe members 13a, 13b and 9a.
The joint 13c bent at 0 ° is brazed and joined to form an annularly closed shape. Reference numeral 13d shown in FIGS. 2 and 3 indicates a working fluid inlet.

The production of such a heat pipe type heat circulator is performed by the following steps. A metal member to be the heat receiving portion 11 and the heat radiating portion 12 is manufactured by extrusion molding of aluminum or the like. At this time, the protruding piece 12a formed on the back side has an upright shape as shown in FIG. On the other hand, the straight pipe members 13a and 13b serving as the heat pipes 13 are connected by a joint 13c to have a substantially rectangular closed shape. The joint between the pipe member and the joint is fixed by brazing. Thereafter, the working fluid is injected into the pipe from the injection port 13d, and the internal pressure is adjusted.

The metal members forming the heat receiving portion 11 and the heat radiating portion 12 are held in a predetermined positional relationship in which the back surfaces are opposed to each other.
Heat pipe 13 joined in a closed shape as described above
Fit. Then, as shown in FIG.
2a is bent so as to be wound around the heat pipe 13, and is fixed to the heat pipe 13 in close contact therewith. As shown in FIG. 5 (b), it is desirable to form a notch 12c at one or several places on the projecting piece. Accordingly, the bending of the protruding piece 12a is facilitated, and the protruding piece 12a can be securely adhered to the heat pipe 13. In the above manufacturing process, after injecting the working fluid into the pipe joined in the closed shape, this is fixed to the metal member of the heat receiving section and the heat radiating section, but the heat receiving section, the heat radiating section and the closed are joined in the closed shape. After assembling the tube, the injection of the hydraulic fluid and the adjustment of the internal pressure can also be performed.

FIG. 6 is a schematic configuration diagram of an image forming apparatus using the heat pipe type heat circulator 1 shown in FIGS. This image forming apparatus includes an image forming unit 2, an intermediate transfer body 3, a driving roll 4, a heating roll 5, a heating and pressing roll 6, a supporting roll 7, a cleaning roll similar to the image forming apparatus shown in FIG. 8, paper tray 9, paper transport path 10, paper transport belt 31, paper discharge tray 33, cooling fan 34, halogen lamp 3 as a heat source
5 and 36 are provided. Then, the toner image T transferred onto the intermediate transfer member 3 is heated at a position along the peripheral surface of the heating roll 5 and pressed against the recording medium 32 in a molten state, thereby simultaneously performing transfer and fixing. It is.

In this image forming apparatus, the heat pipe type heat circulator 1 has a heat receiving portion 11 abutting on the intermediate transfer member 3 downstream of the transfer / fixing position, and a heat radiating portion 12 having a heat roll 5
Is in contact with the intermediate transfer member 3 on the upstream side of the portion wound around the peripheral surface of the intermediate transfer member 3. Then, heat is transferred from the high-temperature intermediate transfer body 3 immediately after the transfer and fixing to the low-temperature intermediate transfer body 3 that has been cooled by passing through the position facing the cleaning roll 8 and the image forming unit 2. Thereby, the intermediate transfer member 3
The efficiency of the heating / cooling performed each time of the rotation is improved.

Next, another embodiment of the present invention will be described. FIG. 7 is a side view and a member assembly view showing a heat pipe type heat circulator according to one embodiment of the invention according to claim 2. The main part of the heat pipe type heat circulator 40 also includes a heat receiving part 41, a heat radiating part 42, and a heat pipe 43 similar to those shown in FIGS.
The heat receiving section 41 and the heat radiating section 42 are provided with six heat pipes 43 at regular intervals.

The front surfaces of the heat receiving portion 41 and the heat radiating portion 42 have a gentle curved surface, and the back surface also has a concave curved surface. As shown in FIG. The protruding pieces 42a are set so that the tips are aligned on the straight line L1, and the depth d of the groove 42b between the pair of protruding pieces is the same. Therefore, the centers of the heat pipes fixed by these projections 42a are also aligned on the straight line L2. With this setting, the plurality of heat pipes 43 can be of the same size, and the workability of fitting the heat pipes and bending the protruding pieces at the time of attachment can be improved.

As shown in FIG. 7 (b), a heat pipe 43 used in this heat circulator has a tube 43a bent in a U-shape and a short tube 43b connected to this tube.
And two joints 43c constitute a main part.
The tube 43a bent in a U-shape has parallel portions fixed to the heat receiving portion 41 and the heat radiating portion 42, respectively, and both ends are connected by two joints 43c and another short tube 43b to be closed in an annular shape. Shape.

The U-shaped tube 43a and the short tube 43b have a portion curved in an S shape as shown in FIG. 7A when viewed from the side. ing. By deforming the curved portion, the relative displacement between the heat receiving portion 41 and the heat radiating portion 42 is allowed, and after the heat receiving portion 41 and the heat radiating portion 42 are firmly fixed to a predetermined position, the temperature change of the tube is caused. By absorbing the expansion and contraction caused by excessive stress, generation of excessive stress is avoided.

Such a heat pipe type heat circulator 40
Also, by using the image forming apparatus as shown in FIG. 6, it becomes possible to efficiently heat and cool the intermediate transfer body 3 that is repeated every rotation.

In place of the curved heat pipe 43 of the present embodiment, a pipe 53 whose pipe wall is bulged in a spiral or annular shape as shown in FIG.
It may be used for a part of a heat pipe. Such a tube 53
The wall of the tube can be easily deformed and expanded and contracted, allowing relative displacement between the heat receiving portion 51 and the heat radiating portion 52 and also preventing generation of temperature stress. The heat circulator in which the heat pipe is provided with the expansion and contraction portion is an embodiment of the invention according to claim 3 of the present application.

[0040]

Next, an embodiment of the present invention will be described.
A heat pipe type heat circulator that can be used in the image forming apparatus shown in FIG. 6 will be described with specific numerical values.

This heat pipe type heat circulator has a heat receiving portion and a heat radiating portion having the same shape as that shown in FIG. 1, and the data are as follows. Material: A6063 aluminum alloy (extrusion molding) Dimensions: Length (arrangement direction of heat pipes) 200 mm Width (axial direction of heat pipes) 350 mm Height 160 mm Number of grooves for heat pipe insertion: 9 Depth of grooves d: 11 mm Thickness between groove portions t: 5 mm Radius of curvature of curved surface on the front side: 1500 mm Surface roughness of curved surface on the front side: Rz = 10 μm or less (JIS B0601)

The data of the heat pipe is as follows. Between the portions fixed to the heat receiving portion and the heat radiating portion, a curved portion bent into an S shape as shown in FIG. Part. Material: phosphorous deoxidized copper (JIS H3300 C1220,
Temper H material) Outer diameter: 9.5 mm Wall thickness: 1 mm Curvature radius of curved portion: 50 to 1000 mm Water is sealed in the heat pipe as a working fluid.

On the other hand, data of an image forming apparatus using the heat pipe type heat circulator is as follows. <Data of image forming apparatus> Constituent material of intermediate transfer body Polyimide Thickness of intermediate transfer body 140 μm Moving speed of intermediate transfer body 260 mm / s Temperature of heating roll 170 ° C Temperature of heating and pressing roll 100 ° C Heating roll and heating and pressing The temperature of the intermediate transfer member at the downstream side of the pressure contact portion with the roll 130 ° C The temperature of the intermediate transfer member 50 ° C just before contacting the heat radiator of the heat circulator 50 ° C (adjusted by a cooling fan)

In the image forming apparatus incorporating the heat pipe type heat circulator as described above, after continuously printing 500 sheets of A4 size paper in a horizontal feed, a heat source (halogen) incorporated in a heating roll and a heating and pressing roll is used. Lamp) was measured with an integrating wattmeter. On the other hand, in order to compare with the result of the above measurement, the same measurement was performed using a heat circulator having a metal member thermally insulated by a heat insulating member as shown in FIG. When these measurement results are compared, it is confirmed that both have substantially the same power reduction effect, and it is recognized that the heat circulator according to the present invention also performs efficient heat circulation.

[0045]

As described above, in the heat pipe type heat circulator according to the present invention, the heat receiving portion and the heat radiating portion are each constituted by one plate-shaped metal member, so that the curved surface processing is easy. The structural strength is also excellent. That is, when a plurality of metal members are connected via a heat insulating member as in the related art, a surface step is easily generated due to a positional shift or the like between the metal members, and the accuracy is poor. In such a heat circulator, such a problem is solved, good heat circulation is performed, and reduction in weight and manufacturing cost can be achieved. Further, by providing the heat pipe with the elastic portion or the curved portion, it is possible to prevent a large stress from acting on the heat pipe at the time of attaching the heat circulator and thereafter.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing a heat pipe type heat circulator according to an embodiment of the present invention.

FIG. 2 is a side view and a front view of the heat pipe type heat circulator shown in FIG.

FIG. 3 is a plan view of the heat pipe type heat circulator shown in FIG.

FIG. 4 is a partial sectional view of a heat radiating portion used in the heat pipe type heat circulator shown in FIG.

FIG. 5 is a partial cross-sectional view showing a structure for fixing the heat radiating unit and the heat pipe shown in FIG. 4;

FIG. 6 is a schematic configuration diagram of an image forming apparatus using the heat pipe type heat circulator shown in FIG.

FIG. 7 is a side view and a member assembly view of a heat pipe type heat circulator as one embodiment of the invention according to claim 2;

FIG. 8 is a cross-sectional view of a metal member used for a heat receiving section and a heat radiating section of the heat pipe type heat circulator shown in FIG.

FIG. 9 is a shape diagram showing another example of a pipe member that can be used in the heat pipe type heat circulator shown in FIG. 1 or FIG.

FIG. 10 is a schematic configuration diagram of a conventionally known image forming apparatus.

FIG. 11 is a schematic perspective view of a conventionally known heat pipe type heat circulator.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 heat pipe type heat circulator 2 image forming unit 3 intermediate transfer member 4 drive roll 5 heating roll 6 heating and pressurizing roll 7 support roll 8 cleaning roll 9 paper tray 10 paper transport path 11 heat receiving unit 12 heat radiating unit 13 heat pipe 31 paper Conveying belt 32 Recording medium 33 Paper discharge tray 34 Cooling fan 35, 36 Heat source (halogen lamp) 40 Heat pipe type heat circulator 41 Heat receiving unit 42 Heat radiating unit 43 Heat pipe 51 Metal member of heat receiving unit 52 Metal member of heat radiating unit 53 Tube Element

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) F28D 15/02 106 F28D 15/02 106Z G03G 15/16 G03G 15/16 15/20 102 15/20 102 15/24 15 / 24 (72) Inventor Takayuki Yamashita 430 Sakai Nakaicho, Ashigara-gun, Kanagawa Prefecture Inside Green Tech Naka Fuji Xerox Co., Ltd. Person Hiroshi Ouchi 2274 Hongo, Ebina-shi, Kanagawa Prefecture Inside Fuji Xerox Co., Ltd. (72) Inventor Shizuo Sagami 430 Nakai-cho Sakai, Ashigara-gun, Kanagawa Prefecture Green Tech Inside Fuji Xerox Co., Ltd. 5-11-3 Shimbashi Sumitomo Light Metal Industry Co., Ltd. (72) Inventor Masatomo Gomibuchi 100 Oki Shinmichi, Ichinomiya-cho, Hoai-gun, Aichi Prefecture Sumitomo Light Metal Industry Co., Ltd. Ichinomiya-machi Ohki Shindo 100 Sumitomo Light Metal Industry Co., Ltd. in the F-term (reference) 2H032 BA05 BA09 BA18 BA21 BA23 2H033 AA02 BA10 BA11 BA12 BA25 BA27 BA29 BB01 BB18 BB34 BE09 2H078 AA29 CC06 DD51 DD56 DD57

Claims (6)

[Claims] 1. A heat receiving portion comprising a plate-shaped metal member and arranged to be in contact with a high-temperature member, and a heat-dissipating portion comprising a plate-shaped metal member and arranged to be in contact with a low-temperature member. A plurality of heat pipes fixed to both the heat receiving portion and the heat radiating portion and having an annular closed shape, wherein the metal member of the heat receiving portion or the metal member of the heat radiating portion has one surface. A plurality of pairs of protruding pieces that are erected in parallel, the heat pipe is fitted between the pair of protruding pieces, and bent so that the protruding pieces are wound around the heat pipe. A heat pipe type heat circulator, which is fixed. 2. A heat receiving portion, which is disposed so as to be in contact with a high-temperature member and from which heat moves, and is disposed so as to be in contact with a low-temperature member, and supplies heat to the low-temperature member. And a plurality of heat pipes fixed to both the heat receiving portion and the heat radiating portion and having an annularly closed shape, wherein the heat pipe has a portion fixed to the heat receiving portion and the heat pipe. A heat pipe type heat circulator having a curved portion between a portion fixed to the heat radiating portion and a curved portion allowing relative displacement between the heat receiving portion and the heat radiating portion. 3. A heat receiving portion, which is disposed so as to be in contact with a high-temperature member and moves heat from the high-temperature member, and is disposed so as to be in contact with a low-temperature member, and supplies heat to the low-temperature member. And a plurality of heat pipes fixed to both the heat receiving section and the heat radiating section and having an annular closed shape, wherein the heat pipe has a portion fixed to the heat receiving section and the heat pipe. A heat pipe type characterized in that a pipe wall expands spirally or annularly between the portion fixed to the heat radiating portion and a telescopic portion allowing relative displacement between the heat receiving portion and the heat radiating portion. Heat circulator. 4. The high-temperature member and the low-temperature member are belt-shaped members that move in a direction substantially perpendicular to a portion of the heat pipe fixed to the heat receiving portion or the heat radiating portion. The heat pipe type heat circulator according to claim 1, wherein a surface of the portion in contact with the belt-shaped member is curved in a moving direction of the belt-shaped member. . 5. The high-temperature member and the low-temperature member are one endless belt that moves in a direction substantially perpendicular to a portion of the heat pipe fixed to the heat receiving portion or the heat radiating portion and is driven to rotate. The heat receiving unit is downstream from a position where the toner image carried on the endless belt is heated and melted, and upstream from a position where a new toner image is transferred onto the endless belt. The heat dissipating portion is located downstream of a position where the toner image is transferred onto the endless belt and upstream of a position where the toner image is heated and melted. The heat pipe type heat circulator according to claim 1, 2 or 3, wherein the heat pipe type heat circulator is in contact with the endless belt. 6. On one surface, two plate-shaped metal members provided with a plurality of pairs of projecting pieces that are erected in parallel and formed in parallel are formed, and a heat pipe is formed in an annularly closed shape. The heat pipe is fitted between the pair of projections of both of the plate-shaped metal members arranged in the above, and the projection is bent so as to be wound around the heat pipe. A method for manufacturing a heat pipe type heat circulator, comprising fixing two metal members.