JP6728916B2 - Cooling device and image forming apparatus - Google Patents

Description

The present invention relates to a cooling device and an image forming apparatus.

Conventionally, a conveyor belt that sandwiches and conveys the front and back sides of a carrier medium and cooling members are respectively provided inside the respective conveyor belts, and while the carrier belt is sandwiched and conveyed, the front and back sides of the carrier medium are simultaneously cooled by a cooling member. A cooling device is known (Patent Document 1).

In the cooling device described in Patent Document 1, a plurality of cooling medium passages through which the cooling medium passes are provided inside the opposing cooling member in the transport direction. Then, the cooling medium that has passed through one cooling medium passage of one cooling member flows to the other cooling member, and then the cooling medium alternately flows to one cooling member and the other cooling member.

Therefore, a temperature difference of the cooling medium occurs between the cooling medium flow paths facing each other of the cooling member. In addition, the temperature difference between the cooling medium flow passages adjacent to each other in the transport direction in the cooling member is such that the cooling medium flow passages adjacent to each other in the transport direction when a meandering cooling medium flow passage is formed in the cooling member (FIG. 12 of Patent Document 1) It becomes larger than the temperature difference in the medium flow path. Further, in the case of the configuration of FIG. 12 of Patent Document 1, since the cooling medium passes through the meandering passage of one cooling member on the front and back sides of the carrier medium and then flows into the meandering passage of the other cooling member, one cooling member and the other The temperature difference between the cooling members is large. Therefore, it is difficult for the cooling device having such a configuration to efficiently cool the carrier medium.

Therefore, it is an object of the present invention to reduce the temperature difference between the cooling members as compared with the conventional case when forming the cooling medium flow passage in the cooling member arranged so as to face the front and back of the carrier medium.

In order to solve this problem, a first conveyor belt provided on one of the front and back sides of a carrier medium, a first inlet port through which a cooling medium flows in, a first outlet port for discharging to the outside, and the first stream A first cooling member that has a first flow path that flows between the inlet and the first outlet and that is in contact with the inner circumference of the first transport belt to cool the transport medium, and is provided on the other of the front and back sides of the transport medium. A second conveyor belt, a second inflow port through which the cooling medium flows in, a second exhaust port for discharging the cooling medium to the outside, and a second flow path flowing between the second inflow port and the second exhaust port. A second cooling member that has an inner periphery of the second conveyor belt and cools the carrier medium; and a heat dissipation unit that radiates heat of the cooling medium discharged from the first cooling member and the second cooling member. An inlet path for flowing the cooling medium radiated by the heat radiating portion to the first inlet and the second inlet, and a cooling medium discharged from the first outlet and the second outlet. have a, a discharge path to flow into the heat radiating portion, and the position of the first outlet to said first inlet, the position of the second outlet to the second inlet is in the transport direction of the both transport medium Located on the upstream side, the cooling medium flowing through the first inlet and the second inlet flows in the same direction, and the first inlet, the first outlet, the second inlet, and the second outlet. Proposes a cooling device characterized in that it is located on one of the sides intersecting the transport direction of the transport medium .

Since the temperature difference between the cooling members facing the front and back of the transport medium can be reduced as compared with the conventional case, the cooling effect can be further enhanced.

FIG. 3 is a schematic sectional view of an image forming apparatus 600 according to this embodiment. 3 is a main-portion cross-sectional view of the cooling device 800 according to the present embodiment, which is a cross-section along the transport medium transport direction. It is a principal part top view which looked at the cooling device 800 of FIG. 2 from the upper part. It is a schematic perspective view of the cooling device 800. FIG. 6 is a schematic perspective view of the upper and lower transport units (FIG. 5A) and an enlarged plan view of the bracket 151 of FIG. 5A as seen from above (FIG. 5B). It is a schematic perspective view of the holding member 53 which supports the lower front side plate 34b2. It is a figure which shows the schematic enlarged view of the holding member 53 which supports the lower front side plate 34b2. It is a figure which shows the schematic enlarged view of the recessed part of the lower front side plate 34b2 which engages with the holding member shown in FIG. It is a schematic front sectional drawing of a conveyance unit. It is a schematic plan view of the conveyance unit of FIG. FIG. 7 is a schematic front view showing a transition when the lower side conveyor belt is moved toward and away from the upper side conveyor belt. It is a schematic perspective view of the apparatus back side of FIG. FIG. 6 is a schematic diagram showing a positional relationship between the driving force transmission gear 11 and the driving gear 43 when the upper transport belt 2 and the lower transport belt 31 are in a sandwiched state. 6 is a control block diagram for controlling driving of a holding member 53. FIG. It is a schematic perspective view of a radiator peripheral part. It is a schematic plan view which concerns on the modification of the cooling device shown in FIG. It is a schematic sectional drawing which shows the modification of the duct 119 shown in FIG. It is a schematic side view which shows a belt exchange method. It is a schematic front view which shows the relationship between the upper side front plate 34a2 and the radiation fin 74a. It is a schematic sectional drawing which shows the modification of the cooling device 800 of FIG. It is a schematic sectional drawing which shows another modification of the cooling device 800 of FIG. It is a schematic sectional drawing which shows another modification of the cooling device 800 of FIG.

This embodiment will be described with reference to the drawings. In the drawings, common members are designated by the same reference numerals.
FIG. 1 is a schematic sectional view of an image forming apparatus 600 according to this embodiment. The image forming apparatus 600 has functions of a copying machine, a printer, a facsimile, etc., and forms a monochrome image on a carrier medium by an electrophotographic method. However, the image forming apparatus according to this embodiment may form a color image, or may have only a print function.

The image forming apparatus 600 includes a document feeding unit 200, a document reading unit 300, an image forming unit 400, a paper feeding unit 500, and a paper ejection tray 700. It should be noted that in the image forming apparatus 600, various rollers provided at predetermined positions, a conveying path A for conveying a medium from the paper feeding unit 500 to the paper discharge tray 700 via the image forming unit 400, a guide plate, and a conveying path. It is formed of a belt or the like. The image forming apparatus 600 can be connected to an external device, for example, a personal computer, and acquires image data from the external device.

The document conveying section 200 conveys a document to the document reading section 300 for continuously reading a document, and has a document feeding tray 210 and a document discharging tray 220. The document transport unit 200 transports the document set on the document feed tray 210 to the reading position on the upper surface of the document reading unit 300. Further, the document feeding unit 200 feeds the document to the document discharge tray 220 after the document reading unit 300 reads the document fed to the reading position.

The document reading unit 300 optically reads a document image, converts information of the document image into an analog electric signal, and further converts the analog electric signal into a digital signal.

The image forming unit 400 includes a drum-shaped photoconductor 410, a charging unit 420 provided around the photoconductor 410 as an image forming function unit, an image writing unit 430, a developing unit 440, a transfer unit 450, a separating unit 460, and And a cleaning unit 470. The image forming unit 400 also includes a fixing unit 480, a cooling device 800, and a paper discharge roller 490.

The charging section 420 applies a predetermined voltage to the photoconductor 410 to uniformly charge the surface of the photoconductor 410. The image writing unit 430 irradiates a laser beam on the basis of the image data read by the document reading unit 300 to form an electrostatic latent image on the photoconductor.

The developing unit 440 reversely develops the electrostatic latent image formed on the photoconductor 410 to generate a toner image on the photoconductor 410. The transport medium is fed in synchronization with the rotation of the photoconductor 410 on which the toner image is generated, and the transfer unit 450 applies a predetermined voltage from the back surface side of the transport belt that transports the transport medium to transfer the photoconductor to the photoconductor. The toner image formed on 410 is transferred to the transport medium.

The separating unit 460 separates the carrier medium from the photoconductor 410 by discharging the carrier medium to which the toner image is transferred. After that, the transport medium on which the toner image is transferred is transported to the fixing unit 480.

The fixing unit 480 heats the carrier medium to melt the toner of the transferred toner image and pressurizes the carrier medium to fix the toner image on the carrier medium. The transport medium is cooled by the cooling device 800, transported by the paper discharge rollers 490, and placed on the paper discharge tray 700. On the other hand, when images are to be formed on both sides, after being cooled by the cooling device 800, the front and back sides of the conveyed medium are reversed in the reversing path 520 and the sheet is fed again to the image forming function section.

The sheet feeding section 500 has a plurality of sheet feeding accommodating sections 510 corresponding to various conveying media, and forms a predetermined conveying medium accommodated in each sheet feeding accommodating section 510 along the conveying path A one by one. The sheet is fed to the unit 400.

FIG. 2 is a main-portion cross-sectional view of the cooling device 800 according to the present embodiment, which is a cross-section along the transport medium transport direction. FIG. 3 is a plan view of an essential part of the cooling device 800 seen from above. 2 and 3, S indicates a carrying medium, and arrow P indicates the carrying direction of the carrying medium.

As shown in FIGS. 2 and 3, the cooling device 800 has an upper transport unit 810 as a first transport unit and a lower transport unit 820 as a second transport unit. The upper transport unit 810 is provided in contact with the upper transport belt 2 as a first transport belt provided on one of the front and back sides of the transport medium S, and the inner circumference of the upper transport belt, and a cooling member that cools the transport medium S. And a first cooling plate 71a. The first cooling plate 71a is a part of the cooling unit 75a. The lower transport unit 820 is arranged so as to face the upper transport unit 810 and sandwiches and transports the transport medium S with the upper transport belt 2. The lower transport unit 820 has a lower transport belt 31 for sandwiching and transporting the transport medium S with the upper transport belt 2. The cooling device 800 has an upper transport unit 810 having the upper transport belt 2 and a cooling unit, and a lower transport unit 820 having the lower transport belt 31 and a cooling unit.

The upper transport belt 2 of the upper transport unit 810 is an endless belt stretched by a plurality of rollers extending in a direction orthogonal to the transport direction of the transport medium S on a horizontal plane. The upper conveyor belt 2 serves as a heat conduction member interposed between the first cooling plate 71a and the conveyance medium S, and thus is preferably made of a material having a high thermal conductivity or a thin film shape (for example, a thin stainless belt or polyimide). Film etc.). The rollers (tensioning rollers) around which the upper conveyor belt 2 is stretched are the driving roller 3 and the driven roller 7.

In the upper transport unit 810, the drive roller 3 as the first stretching member that stretches the upper transport belt 2 is provided on the downstream side in the transport direction of the transport medium. The drive roller 3 is a drive roller that drives the upper conveyor belt 2 to rotate clockwise in the drawing (direction of arrow R in FIG. 2), and is a roller in which an elastic member such as rubber is wound around a metal cored bar. is there.

The driven roller 7 is a driven roller that supports the upper conveyance belt 2 and that is rotated by the rotational force of the upper conveyance belt 2, and is composed of a roller having the same configuration as the drive roller 3 or a metal roller.
The driven roller 7 is a tension roller that urges the upper conveyance belt 2 from the inside to the outside. By applying a tension to the upper conveyance belt 2, the driven roller 7 presses the upper conveyance belt 2 against the driving roller 3 to generate a frictional force and drive the driving roller 3. The rotational force of the roller 3 is transmitted to the upper conveyor belt 2, and the upper conveyor belt 2 rotates.

The lower transport belt 31 of the lower transport unit 820 is an endless belt that transports the transport medium S by sandwiching it with the upper transport belt 2, and is provided below the upper transport belt 2. The lower conveyor belt 31 may be made of the same material as the upper conveyor belt 2 or may be made of a rubber elastic material.

The roller (tension roller) for stretching the lower conveyor belt 31 is a drive roller 32 as a second tension member on the downstream side in the transport direction of the transport medium and a driven roller as an upstream fourth tension member on the upstream side. 33. The drive roller 32 rotationally drives the lower transport belt 31 counterclockwise (direction of arrow L in FIG. 2). The drive roller 32 may be the same roller as the upper drive roller 3. Rotational force is transmitted to the drive roller 32 through engagement of the drive force transmission gear 11 attached to the drive roller 3 and the drive gear 43 attached to the drive roller 32, and the drive roller 32 moves counterclockwise. It rotates (Fig. 4).

The driven roller 33 is a tension roller that urges the lower conveyance belt 31 from the inside to the outside, and by applying a tension to the lower conveyance belt 31, the lower conveyance belt 31 is pressed against the drive roller 32 to generate a frictional force. Let As a result, the rotational force of the drive roller 32 is transmitted to the lower transport belt 31, and the lower transport belt 31 rotates.

As shown in FIGS. 2 and 3, the cooling units 75a and 75b include cooling plates 71a and 71b, cooling pipes 72a and 72b as cooling medium flow paths, a liquid reservoir tank 83, a pump 82 as a medium supply unit, and a heat radiating unit. And a fan 81 as a cooling means.

The cooling plates 71a and 71b are members formed of a metal having a high thermal conductivity, such as aluminum or copper, and the heat receiving surfaces that come into contact with the upper conveyor belt 2 are flat plates. The first cooling plate 71 a is provided inside the upper conveyance belt 2 and between the drive roller 3 and the driven roller 7. Since the downstream end and the upstream end of the first cooling plate 71a in the transport medium transport direction extend to the vicinity of the drive roller 3 and the driven roller 7, respectively, the cooling effect of the transport medium S passing through the cooling device 800 is enhanced. To be

The cooling plates 71a, 71b are provided with a plurality of fitting portions respectively fitted with the cooling pipes 72a, 72b, and in this embodiment, two fitting portions are provided. The fitting portion is formed on a horizontal plane in a direction orthogonal to the transport medium transport direction. The first cooling pipe 72a is arranged directly above the second cooling pipe 72b. This makes it possible to cool the carrier medium.

Further, the cooling plates 71a and 71b are provided with a plurality of radiation fins 74a and 74b. Specifically, three heat radiation fins 74a and 74b are provided at intervals between the adjacent cooling pipes 72a and 72b. The heat radiation fins are formed on a horizontal plane in a direction orthogonal to the transport direction of the transport medium. A ventilation path is formed between the radiation fins 74a and 74b along which the airflow passes along the radiation fins 74a and 74b. When the heat receiving surface of the cooling plate receives the heat of the carrier medium S in the area between the adjacent cooling pipes 72a and 72b without the cooling medium passage, not only the heat is taken away by the cooling medium in the cooling pipe but also the heat is radiated. The fins 74a and 74b also radiate heat from the heat receiving surface. Thereby, the cooling effect is higher than that of the cooling unit provided with only the radiation fins or only the cooling pipes.

The cooling pipes 72a and 72b are tubular members formed of a metal having good thermal conductivity, such as aluminum or copper, and form a cooling medium flow path through which the cooling medium flows in a direction intersecting the transportation medium transportation direction. The cooling medium contains, for example, water as a main component, propylene glycol or ethylene glycol for lowering the freezing temperature, and an anticorrosive agent for preventing rust on metal parts (for example, phosphate-based substance: phosphoric acid). Potassium salt, inorganic potassium salt, etc.) are added.

The liquid storage tank 83 is a tank that stores this cooling medium. The drive of the pump 82 is controlled by the control unit (see FIG. 13), the cooling medium is supplied from the liquid storage tank 83 to the radiator 80, and the cooling medium is circulated in the cooling pipe.

The fan 81 is arranged near an opening that connects the inside of the image forming apparatus 600 and the outside of the apparatus. The fan 81 allows the outside air to flow in through the opening and guides it to the radiator 80. The cooling medium radiated by passing through the radiator 80 is split into the first cooling pipe 72a and the second cooling pipe 72b by the flow path branching unit 840. On the other hand, the cooling medium discharged from the outlets of the first cooling pipe 72 a and the second cooling pipe 72 b is collected in one flow passage by the flow passage merging portion 830 and flows into the liquid storage tank 83.

The pump 82 supplies the cooling medium from the liquid reservoir tank 83 to the cooling pipe 72 so that the cooling medium flows from the downstream side to the upstream side in the transport direction of the transport medium S through the flow path in the cooling pipe 72 during image formation. .. Therefore, the cooling medium supplied to the cooling pipe 72 flows through the inside of the cooling pipe 72 arranged on the most downstream side in the conveying medium conveying direction, and is discharged from the cooling pipe 72 arranged on the most upstream side. Then, the cooling medium is stored in the liquid storage tank 83.

In this way, the pump 82 supplies the cooling medium to the cooling pipe 72 so that the cooling medium flows in the cooling pipe 72 from the downstream side to the upstream side in the conveying medium conveying direction. The arrow W in FIG. 3 indicates the flow direction of the cooling medium.

4 shows a schematic perspective view of the cooling device 800, FIG. 5(a) shows a schematic perspective view of the upper and lower transport units, and FIG. 5(b) shows the bracket 151 of FIG. 5(a) from above. FIG. FIG. 6 is a schematic perspective view of the holding member 53 that supports the lower front plate 34b2 of FIG. FIG. 7 is a schematic enlarged view of the holding member 53 that supports the lower front plate 34b2 of FIG. FIG. 8 is a schematic enlarged view of the recess of the lower front plate 34b2 that engages with the holding member shown in FIG. FIG. 9 is a schematic front sectional view of the transport unit. 10 is a schematic plan view of the transport unit shown in FIG. 9, and FIG. 11 is a schematic diagram showing a transition when the lower transport belt is moved toward and away from the upper transport belt. 12 is a schematic perspective view of the apparatus back side of FIG. In addition, a part of the configuration is partially shown so that the internal configuration can be easily understood.

The upper front plate 34a2 and the upper rear plate 34a1 are provided on the front and rear sides of the upper transport unit 810 of the cooling device 800, and support roller shafts (drive roller 3 and driven roller 7) that drive or support the upper transport belt 2. To do. Further, the lower front side plate 34b2 and the lower rear side plate 34b1 are respectively provided on the front and rear sides of the lower side transport unit 820 of the cooling device 800 and drive or support the lower side transport belt 31 (drive roller 32 and Supports the driven roller 33).

As shown in FIGS. 2, 4, and 13, the upper transport unit 810 of the cooling device 800 includes a drive roller 3 as a first stretching member that stretches the upper transport belt 2 and a drive roller 3 on the downstream side in the transport direction. A drive motor 22 as a drive unit for driving the drive roller and a drive force transmission gear 11 as a first drive gear provided on the drive roller 3 are provided. On the other hand, the lower transport unit 820 of the cooling device 800 includes a drive roller 32 as a second stretching member that stretches the lower transport belt 31 and a second drive provided on the drive roller 32 on the downstream side in the transport direction. The drive gear 43 as a gear is provided. As shown in FIG. 4, the main body side drive gear 59 located on the rear side of the upper transport unit 810 is connected to the drive motor 22. The drive gear 10 provided coaxially with the drive roller 3 engages with the main body drive gear 59 and transmits the rotational force of the main body drive gear 59 to the drive roller 3. The driving force transmission gear 11 on the front side of the upper conveyance unit 810 transmits the rotational driving force of the driving roller 3 to the belt drive shaft (driving roller 32) of the lower conveyance unit 820 by engaging with the driving gear 43.

<Regarding the upper transport unit 810 as the first transport unit>
As shown in FIG. 4, the main body rear side plate 100 has a main body guide 102 extending from the rear side of the device toward the front side. Since the main body guide 102 supports the L-shaped engaging portion 9a protruding above the upper rear side plate 34a1 and guides it in the front-rear direction, the operability when the upper transport unit 810 is attached to and detached from the apparatus main body is improved.

As shown in FIG. 4, the driven roller 7 in the upper conveyance unit 810 is provided in the front-rear direction of the apparatus and is held by the upper tension roller support member 35a via the bearing 36a. The bearing 36a is movable in a groove formed in the upper tension roller support member 35a. The driven roller 7 presses the upper conveyance belt 2 from the inside to the outside of the upper conveyance belt 2 by the elastic member 37a (spring) installed in the groove. Therefore, the driven roller 7 is brought into pressure contact with the upper transport belt 2, and the upper transport belt 2 is tensioned. By applying tension to the upper conveyor belt 2, the upper conveyor belt 2 can be pressed against the drive roller 3 to generate a frictional force. Therefore, the rotational force of the drive roller 3 is transmitted to the upper conveyor belt 2 and the upper conveyor belt 2 rotates.

A connecting shaft 39a, which is partially shown in FIG. 4, is a shaft for connecting the upper tension roller support members 35a arranged in front of and behind the apparatus as shown in FIG. Two upper tension roller support members 35a are rotatable around the connecting shaft 39a. On the surfaces of the upper front plate 34a2 and the upper rear plate 34a1 and the upper tension roller support member 35a facing each other, a convex portion is formed on one side and a concave portion is formed on the other side. Therefore, due to the engagement of the projections and depressions, the rotation of the two upper tension roller support members 35a is restricted in the state of FIG.

As shown in FIGS. 4 and 5, the reference pin 73a of the upper conveyance unit 810 of the cooling device 800 is fixed to the lateral side surface of the stay member 70a. These reference pins 73a penetrate the upper front side plate 34a2 and are inserted and engaged in the reference holes 103a (FIG. 10) of the main body front side plate 103. Further, an engagement hole 76 of the upper rear side plate 34a1 is formed on the rear surface side of the upper side transport unit 810, and a reference pin 77 that engages with the engagement hole 101 of the main body rear side plate 100 is formed in this engagement hole 76. Is provided. With such a configuration, the image forming apparatus main body and the upper transport unit 810 are positioned (FIG. 10).

As shown in FIGS. 9 and 10, the first cooling plate 71a urges the upper conveyance belt 2 downward by the elastic member 98a configured as a compression spring. One end of the elastic member 98a is fixed to the stay member 70a, and the other end presses the upper surface of the first cooling plate 71a between the adjacent radiating fins 74a (FIG. 9). A plurality of elastic members 98a are provided in a direction intersecting the transport medium transport direction (FIG. 10). Further, guide portions extending in the vertical direction are formed on the lateral side surfaces of the first cooling plate 71a and the stay member 70a, and the first cooling plate 71a is movable in the vertical direction with respect to the stay member 70a.

<Regarding Lower Transport Unit 820 as Second Transport Means>
As shown in FIG. 4, the driven roller 33 in the lower transport unit 820 is provided in the front-rear direction of the device and is held by the lower tension roller support member 35b via a bearing 36b. The bearing 36b is movable in a groove formed in the lower tension roller support member 35b. The driven roller 33 presses the lower conveyance belt 31 from the inside to the outside of the lower conveyance belt 31 by the elastic member 37b (spring) installed in this groove. Therefore, the driven roller 33 is brought into pressure contact with the lower transport belt 31, and the lower transport belt 31 is tensioned. By applying tension to the lower conveyor belt 31, the lower conveyor belt 31 can be pressed against the drive roller 32 to generate a frictional force. Therefore, the rotational force of the drive roller 32 is transmitted to the lower transport belt 31, and the lower transport belt 31 rotates.

A connection shaft 39b, which is partially shown in FIG. 4, is a shaft that connects between the lower tension roller support members 35b arranged at the front and rear of the apparatus (see FIG. 10). Two lower tension roller support members 35b are rotatable around the connecting shaft 39b. On the surfaces of the lower front plate 34b2 or the lower rear plate 34b1 and the lower tension roller support member 35b facing each other, a convex portion is formed on one side and a concave portion is formed on the other side. Therefore, the engagement of the projections and depressions restricts the rotation of the two lower tension roller support members 35b in the state of FIG.

As shown in FIGS. 4 and 5, the reference pins 73b of the lower transport unit 820 of the cooling device 800 are fixed to the lateral side surfaces of the stay member 70b, respectively. These reference pins 73b are inserted into and engaged with the reference holes of the lower front side plate 34b2 to determine the position of the second cooling plate 71b in the front direction. Brackets 151 and 152 are provided behind the reference pin 73b on the lateral side surface of the stay member 70b (FIG. 5). The bracket 151 is an L-shaped member, and one end of the bracket 151 is fastened to the side surface of the stay member 70b with a screw or the like. The other end of the bracket 151 is provided with a reference hole into which the pin 155 (FIG. 5B) fixed to the lower rear plate 34b1 is inserted. The bracket 151 is similarly arranged on the left side. As a result, the lower rear plate 34b1 is detachably held by the stay member 70b via the pin and the bracket 151. The bracket 152 is an L-shaped member as shown in FIG. 12, one end of which is fixed to the back side of the rear plate 100 of the main body by a screw or the like, and the other end of which is rotatably supported on the lateral side surface of the stay member 70b. Has been done. At this time, the bracket 152 is fixed so that the stay member 70b can rotate about the rotation shaft 153. The brackets 152 are provided on the lateral side surfaces on both sides of the stay member 70b, respectively, and are located outside the second cooling pipe 72b (FIG. 5). In this way, the lower front plate 34b2, the lower rear plate 34b1, and the lower transport belt 31 are unitized, and the unitized lower transport unit 820 has a rotating shaft as a rotating unit as shown in FIG. It can rotate around 153 and can move toward and away from the upper transport unit 810.

As shown in FIGS. 9 and 10, the second cooling plate 71b urges the lower conveyance belt 31 upward by an elastic member 98b configured as a compression spring. One end of the elastic member 98b is fixed to the stay member 70b, and the other end pushes up the lower surface of the second cooling plate 71b between the adjacent radiating fins 74b (FIG. 9). A plurality of elastic members 98b are provided in a direction intersecting the transport medium transport direction (FIG. 10). Further, a guide portion extending in the vertical direction is formed on the lateral side surfaces of the second cooling plate 71b and the stay member 70b, and the second cooling plate 71b is movable in the vertical direction with respect to the stay member 70b.

As shown in FIGS. 2, 4 and 5, the cooling device 800 is provided on one side of the front and back sides of the transport medium S, which is the upper side transport belt 2 as the first transport belt, and on the other side of the front and back sides of the transport medium S. A lower side conveyor belt 31 as a second conveying means, a first cooling plate 71a as a first cooling member that comes into contact with the inner circumference of the upper side conveyor belt 2 and cools the conveyed medium, and an inner circumference of the lower side conveyor belt 31. It has the 2nd cooling plate 71b as a 2nd cooling member which contacts and cools a conveyance medium, and the radiator 80 as a heat radiation part which radiates|emits the heat of the cooling medium discharged from the 1st cooling plate 71a and the 2nd cooling plate 71b. .. The first cooling plate 71a has a first inflow port 78a (a downstream side portion of the first cooling pipe 72a in the transport direction) through which a cooling medium flows in, and a first exhaust port 79a (of the first cooling pipe 72a) that is exhausted to the outside. And a first flow path (first cooling pipe 72a in the first cooling plate 71a) flowing between the first inlet 78a and the first outlet 79a. The second cooling plate 71b has a second inflow port 78b (downstream side portion of the second cooling pipe 72b) into which a cooling medium flows, and a second exhaust port 79b (second cooling pipe) that is discharged to the outside. And a second flow path (second cooling pipe 72b in the second cooling plate 71b) flowing between the second inflow port 78b and the second discharge port 79b. In addition, the cooling device 800 is provided with an introduction path for flowing the cooling medium radiated by the radiator 80 to the first inflow port 78a and the second inflow port 78b, and cooling discharged from the first exhaust port 79a and the second exhaust port 79b. And a discharge path through which the media merge and flow to the radiator 80. As a result, the temperature difference between the respective cooling plates facing the front and back of the transport medium S can be reduced as compared to the conventional case, so that the cooling effect on the transport medium S can be further enhanced.

As shown in FIGS. 2 and 11, the cooling device 800 includes an upper conveyance unit 810 having at least the upper conveyance belt 2 and the first cooling plate 71a, at least a lower conveyance belt 31, and a second cooling plate 71b. And a rotary shaft 153 as a rotating portion that rotates the lower transport unit 820 so that the lower transport unit 820 can move toward and away from the upper transport unit 810. The rotary shaft 153 includes the second cooling plate 71b. Is provided on the second inflow port 78b side with reference to. As a result, the transport medium left between the opposing cooling members can be taken out.

Further, as shown in FIG. 2, the first inflow port 78a and the second inflow port 78b are opposed to each other via the transport path A of the transport medium S. Thereby, the introduction paths of the cooling member to the cooling plate are opposed to each other, so that the cooling effect can be further enhanced.

Further, as shown in FIGS. 5 and 11, the introduction path includes a first introduction path (first cooling pipe 72a) leading to a first flow path (first cooling pipe 72a in the first cooling plate 71a), A second introduction passage (second cooling pipe 72b) leading to two flow passages (second cooling pipe 72b in the second cooling plate 71b), a first introduction passage (first cooling pipe 72a), and a second introduction passage (first And a branch portion 840 that branches into two cooling pipes 72b), and the second introduction path (second cooling pipe 72b) is configured by an elastic member that is elastically deformable. Accordingly, when the lower transport unit 820 is separated from the upper transport unit 810, the second introduction path (second cooling pipe 72b) is elastically deformed, so that the cooling medium can be prevented from leaking from the introduction path.

When the upper conveyor belt 2 and the lower conveyor belt 31 are sandwiched as shown in FIGS. 2, 9 and 11, the lower conveyor unit 820 is supported by the holding members 53a and 53b as shown in FIG. ing. Two holding members 53a and 53b are provided on the left and right of the lower front plate 34b2, and each of them is provided with a pressure roller 57a and 57b, a shaft 55a and 55b of the pressure roller, and is installed on the shaft to move in the guide groove 61. It comprises possible bearings 56a, 56b and pressure members 54a, 54b.

FIG. 7 is a schematic enlarged view of one of the two holding members.
As shown in FIGS. 6 and 8, the peripheral surface of the cylindrical pressure roller 57 engages with the lower side surfaces 34a and 34b of the lower front plate 34b2 formed by the mountain-shaped notches 62, and the shaft 55 and The pressure of the pressure member 54 configured as a compression spring is transmitted from the lower front plate 34b2 to the lower transport unit 820 via the bearing 56. That is, the pressure roller 57 has a function of pressing the lower transport unit 820 against the upper transport unit 810. As shown in FIG. 8, the lower side surfaces 34a and 34b of the lower front plate 34b2 are inclined surfaces that are inclined with respect to the horizontal plane, and contact two points on the outer circumference of the pressure roller 57. This contact position is above the center of the pressure roller 57.

As shown in FIG. 6, the holding members 53a and 53b are U-shaped in cross section, and hold the pressure rollers 57a and 57b, the bearings 56a and 56b, the shafts 55a and 55b, and the pressure members 54a and 54b, respectively. .. The holding members 53a and 53b are rotatably installed on the brackets 51a and 51b via shafts 52a and 52b, respectively. On the other hand, the brackets 51a and 51b are fixed to the frame 60 of the apparatus body as shown in FIG.

As shown in FIG. 6, a handle 58 is fixed to the shaft 52a, and when the user rotates the handle 58 in the counterclockwise direction, the shaft 52a also rotates in the counterclockwise direction. With the rotation of the shaft 52a, the holding members 53a and 53b also rotate counterclockwise. The rotation of the holding members 53a and 53b releases the engagement state between the pressure roller 57 and the lower side surfaces 34a and 34b of the lower front side plate 34b2 shown in FIG. Then, as shown by the broken line in FIG. 11, the lower transport unit 820 rotates about the axis center of the rotary shaft 153 as a fulcrum, and the lower transport unit 820 and the upper transport unit 810 are located on the left side (front side of the apparatus) in the figure. A space 63 is created between and. Therefore, when the image forming apparatus 600 stops while the transport medium S is sandwiched between the upper transport belt 2 and the lower transport belt 31, the user rotates the handle 58 in the counterclockwise direction to move the lower transport unit 820 downward. By rotating, the space 63 shown in FIG. 11 is formed, and the transport medium S can be taken out from this space 63.

Then, in the state shown in FIG. 11, since the upper transport unit 810 and the lower transport unit 820 do not move from the apparatus body, the configuration is simpler than the configuration in which the upper transport unit 810 is pulled out from the apparatus body.

FIG. 13 is a schematic diagram showing a positional relationship between the driving force transmission gear 11 and the driving gear 43 when the upper conveyance belt 2 and the lower conveyance belt 31 are in a sandwiched state. In FIG. 13, the broken lines on the outer circumferences of the driving force transmission gear 11 and the driving gear 43 indicate the positions of the tips of the gears.

When the center O of the drive gear 43 is displaced upstream from the perpendicular line passing through the center O of the driving force transmission gear 11 (FIG. 13B) or is displaced downstream in the transport medium transfer direction. When the lower transport unit 820 is rotated and closed (FIG. 13C), the tooth crests of the driving force transmission gear 11 and the tooth crests of the drive gear 43 do not face each other and come into contact with each other. Mesh with each other. More specifically, since the driving force transmission gear 11 is also stopped when the movement of the upper conveyor belt 2 is stopped, the driven rotatable drive gear 43 that enters the driving force transmission gear 11 is When it comes into contact with the tip of the driving force transmission gear 11, the driving gear 43 meshes with the driving force transmission gear 11 while rotating.

On the contrary, the rotation of the rotary shaft 153 causes the lower conveyor belt 31 to separate from the upper conveyor belt 2, whereby the engagement between the driving force transmission gear 11 and the driving gear 43 is released. As a result, the drive connection between the upper transport unit 810 and the lower transport unit 820 is released, and the takeout property of the transport medium S between the upper transport unit 810 and the lower transport unit 820 is improved.

On the other hand, when the center O of the drive gear 43 and the driving force transmission gear 11 is on the vertical line (FIG. 13A), when the drive gear 43 reaches the nipping position between the upper conveyance belt 2 and the lower conveyance belt 31. , The drive gear 43 rises in the vertical direction. Therefore, the tooth crests of the driving force transmission gear 11 and the tooth crests of the drive gear 43 may face each other, and the teeth may not mesh with each other. Therefore, it is preferable that the center O of the drive gear 43 is deviated from the vertical line passing through the center O of the driving force transmission gear 11 in the transport medium transport direction.

FIG. 14 is a control block diagram for controlling the driving of the holding member 53.
In the cooling device 800 of the above-described embodiment, the user manually moves the holding member 53 by rotating the handle 58, but in the cooling device of the present embodiment, the drive motor 23 that drives the holding member 53 is provided. It was

As shown in FIG. 14A, the cooling device 800 includes a drive motor 23 for the holding roller 53 in addition to the drive motor 22 for the drive roller 3. When the image forming apparatus 600 stops, for example, when the sensor 121 detects that the cover of the image forming apparatus is opened, the drive motor 23 receives a command from the control unit 64 connected to the sensor 121, and causes the holding member 53 to move. Rotate. As a result, the lower transport unit 820 moves to the lowered position. Further, the lower transport unit 820 may be rotated by the drive motor 23. By automatically rotating the holding member 53 by the drive motor 23, the manual operation by the user can be omitted and the maintenance time when the image forming apparatus is stopped can be shortened.

Further, the sensor 121 may detect a jam in the conveyance path A of the image forming apparatus 600.

As shown in FIG. 14B, the cooling device 800 does not include the drive motor 23 for the holding member 53, and the drive motor 22 for the drive roller 3 does not connect the holding member 53 and the lower transport unit 820. Is configured to drive. For this purpose, switching means 24 is provided. The switching unit 24 switches the drive motor 22 so that the drive motor 22 is driven and transmitted only to the drive roller 3 when the image forming apparatus 600 is operating, and when the image forming apparatus 600 is stopped, the drive motor 22 and the holding member 53 and the lower side. Switching is performed so that drive is transmitted only to the transport unit 820. As a result, the device can be made smaller than the configuration shown in FIG.

Note that, in FIG. 14, the sensor 121 may detect the presence or absence of the transport medium S in the cooling device 800 when the image forming device 600 stops. In this case, since the lower conveyance unit 820 is automatically separated from the upper conveyance unit 810 by the drive motor 22 or the drive motor 23 and the upper and lower belts can be separated quickly, toner adhesion to the belt can be prevented.

FIG. 15 shows a schematic perspective view of the radiator peripheral portion.
The circulation path 95 includes pipes 84 and 85 connecting one opening of the cooling plate 71 and the liquid storage tank 83, pipes 88 and 89 connecting the other opening of the cooling plate 71 and the radiator 80, and a radiator. A pipe 87 that connects the pump 80 and the pump 82, and a pipe 86 that connects the pump 82 and the liquid storage tank 83 are provided. The joint 90 connects the pipes 84 and 85, and the joint 91 connects the pipes 88 and 89. The circulation path 95 having the pipes 84, 85, 86, 87, 88, 89 forms one flow path, but inside the cooling plate 71, a folded flow path is formed as shown in FIG. The cooling medium flowing in the circulation path 95 effectively cools the cooling plate 71. The cooling medium cooled by the radiator 80 is preferably introduced on the downstream side in the transport medium transport direction.

The liquid storage tank 83 is a tank that stores the cooling medium that has passed through the cooling pipe 72, and the pump 82 is a transporting unit that transports the cooling medium. The liquid storage tank 83 and the pump 82 are provided between the cooling plate 71 and the radiator 80. As a result, the liquid storage tank 83 and the pump 82 are arranged on the upstream side of the fan 81 that cools the radiator 80 in the blowing direction, and are not affected by the exhaust heat, so that the cooling efficiency is further improved.

The radiator 80 is a heat radiating unit that radiates the heat of the cooling medium, and has a plurality of flow paths in the vertical direction through which the cooling medium flowing from the pipe 87 flows toward the pipe 88. Fins are formed between the flow paths, and the air flow passes between the fins to cool the cooling medium in the flow paths. Since the fan 81 is arranged on the downstream side of the radiator 80 in the air blowing direction and rotates so as to draw in the airflow from the radiator 80, the airflow passes through the radiator 80. In addition, outside air is introduced from above or from the side of the radiator, and the outside air passes from the surface of the radiator 80 opposite to the surface facing the fan 81.

Although two fans 81 are provided for one radiator 80 in FIG. 15, the present invention is not limited to this configuration, and one radiator may be provided for one fan. Further, the number of fans may be three or more, or may be one.

15 and 4, the stay member 70a supports the cooling plate 71 fixed to the main body. The stay member 70a covers the first cooling plate 71a and forms a flow path for flowing an air flow between the adjacent heat radiation fins 74a. The stay member 70b has the same structure.
The first cooling plate 71a is a cooling plate that holds and fixes the first cooling pipe 72a, and contacts the inner peripheral surface of the upper conveyance belt 2 with the heat absorption surface on the side opposite to the heat radiation fins 74a to cool the belt. Further, the heat of the transport medium S contacting the upper transport belt 2 is removed to cool the transport medium S. The second cooling plate 71b also has a similar configuration.

As shown in FIG. 15, a duct 119 is connected to an opening portion behind the stay members 70a, 70b and the cooling plates 71a, 71b (rearward of the image forming apparatus 600), and the opening portion is closed. A fan 120 is provided at the end of the duct 119. The duct 119 and the fan 120 that guide the airflow passing through the airflow path formed by the heat radiation fins 74a and 74b are arranged between the cooling plates 71a and 71b and the radiator 80 and next to the liquid storage tank 83. The cooling device 800 can be downsized by disposing the duct and the fan in an empty space beside the liquid storage tank 83. The duct 119 is provided in the space between the pipes 89 and 84, and is formed so as to have a narrow width from the front side to the rear side of the image forming apparatus (also referred to as the upstream side to the downstream side in the air blowing direction). The inlet of the duct 119 has an opening area for receiving both the heat radiation fins 74a and 74b. The fan 120 rotates so as to draw the airflow from the duct 119.

The outside air introduced by the fan 120 from the front surface of the apparatus main body or the lateral side surface adjacent to the front surface is introduced from the gap 118 between the upper front plate 34a2 and the upper conveyor belt 2 shown in FIG. The airflow flowing between the radiation fins 74 a and 74 b passes through the duct 119 and is exhausted by the fan 120. The exhausted airflow passes through the radiator 80 and is exhausted outside the device by the fan 81.

Next, the operation of the cooling device 800 configured as described above will be described.
When the transport medium S is sandwiched and transported by the upper transport belt 2 and the lower transport belt 31, as shown in FIG. 2, the upper transport unit 810 and the lower transport unit 820 are brought close to each other. In this state, when the drive roller 3 of the upper transport unit 810 is rotationally driven, the upper transport belt 2 and the lower transport belt 31 run in the arrow R and L directions, and the transport medium S travels in the arrow direction ( (Fig. 2). In this state, the cooling medium circulates in the circulation path 95. That is, by driving the pump 82, the cooling medium flows in the cooling medium passage of the cooling plate 71.

At this time, the inner surface of the upper transport belt 2 of the upper transport unit 810 slides on the heat absorption surface of the first cooling plate 71a. Therefore, the first cooling plate 71a absorbs heat of the transport medium S from the front surface side of the transport medium S via the upper transport belt 2. In this case, the cooling medium transports the amount of heat absorbed by the cooling plate 71 to the outside, so that the first cooling plate 71a is kept at a low temperature. The same applies to the second cooling plate 71b of the lower transport unit 820.

That is, by driving the pump 82, the cooling medium circulates in the circulation path 95, the cooling medium flowing in the cooling medium flow path of the cooling plate 71 and absorbing heat, and having a high temperature passes through the radiator 80. The heat is radiated to the outside air and the temperature of the cooling medium is lowered. Then, the cooling medium having the low temperature flows again in the circulation path 95, and the cooling plates 71a and 71b perform the function of absorbing heat from the transport medium S. The transport medium S is cooled by repeating this cycle.

FIG. 16 is a schematic plan view according to a modified example of the cooling device shown in FIG. In FIG. 16, four flow paths are shown in the transport direction, but the same flow path as in FIG. 3 can be applied.
When the temperature of the air flow exhausted by the fan 120 is higher than the temperature of the outside air passing through the radiator 80, it is difficult to efficiently cool the cooling medium flowing inside the radiator 80. Therefore, in the cooling device 800 shown in FIG. 15, a duct 116 for exhausting the air flow exhausted by the fan 120 to the outside of the device is provided at the rear end of the fan 120. Then, in order to allow the airflow to be introduced from the right side of the radiator 80, the duct 116 is bent in the transport medium transport direction (downward in the drawing) in order to form a space between the duct 116 and the radiator 80, and then the device is moved. It extends from front to back. At that time, the flow path of the duct 116 is formed above the pipes 88 and 89 so that the duct 116 does not interfere with the pipes 88 and 89. Then, the air flow after passing through the duct 116 is exhausted from the exhaust port 65 to the outside of the device. Further, a duct 117 for guiding the air flow passing through the fan 81 to the outside of the device is installed at the rear end of the fan 81, and the exhaust port of the duct 116 and the exhaust port of the duct 117 for the radiator 80 are arranged along the transport medium transport direction. Are adjacent to each other.

In the present embodiment, the airflow warmed by passing between the radiation fins 74a and 74b does not pass through the radiator 80, so that the cooling medium flowing through the radiator 80 can be cooled more efficiently.

FIG. 17 is a schematic sectional view showing a modified example of the duct 119 shown in FIG.
In the cooling device 800 of FIG. 15, the airflow that has passed through the radiation fins 74a and 74b is introduced into one duct 119, but the configuration is not limited to this. For example, the ducts 119a and 119b and the fans 120a and 120b corresponding to the radiation fins 74a and 74b may be provided.

As shown in FIG. 17, the cooling device 800 has a duct 119b corresponding to the heat radiation fins 74b in the lower transport unit 820 and a fan 120b. As illustrated, since the lower transport unit 820 rotates about the rotation shaft 153, the upper introduction port 141 and the lower introduction port 142 of the duct 119b corresponding to the heat radiation fins 74b of the lower transport unit 820 are It is necessary not to interfere with the cooling plate 71b and the stay member 70b. Therefore, the upper introduction port 141 and the lower introduction port 142 of the duct 119 are shaped so as to deviate from the rotation loci of the second cooling plate 71b and the stay member 70b. Specifically, the upper introduction port 141 is formed so as to project upward, and the lower introduction port 142 is inclined downward.

FIG. 18 is a schematic side view showing the belt exchange method. Since the upper transport unit 810 and the lower transport unit 820 have the same configuration, the description will be given with reference to FIG. 18 showing only the lower transport unit 820.
As shown by the broken line in FIG. 11, after lowering the lower transport unit 820 to the lowered position, the fastening of each of the above-described transport units is released, so that the transport unit can be pulled out to the front and detached. When exchanging the belt, the lower tension roller support member 35b is rotated counterclockwise about the connecting shaft 39. Then, the driven roller 33 moves as shown by the solid line in FIG. 18, and the belt tension state is released. By releasing the belt tension state, the inner circumferential length of the belt becomes longer than the outer circumferential length formed by each roller, and the belt can be attached and detached.

FIG. 19 is a schematic front view showing the relationship between the upper front plate 34a2 and the radiation fins 74a. The same applies to the relationship between the lower front plate 34b2 and the radiation fins 74b.
In the cooling device 800 of FIG. 10, the outside air is introduced between the radiation fins 74a and 74b through the gap 118 between the upper front plate 34a2 and the upper conveyor belt 2. On the other hand, in the cooling device 800 of FIG. 19, the slit 38a, which is an opening communicating with the airflow path formed by the heat radiation fins 74a, is provided in the portion of the upper front plate 34a2 that faces the heat radiation fins 74a. The slits 38a are formed in the carrying medium carrying direction over the entire width of the plurality of heat radiating fins 74a provided between the adjacent cooling pipes 72, and a plurality of slits 38a are provided vertically. This makes it easier to introduce outside air between the radiation fins 74a, and thus allows more heat to be dissipated from the heat receiving surface of the cooling plate 71.

FIG. 20 is a schematic sectional view showing a modified example of the cooling device 800 of FIG.
In the embodiment shown in FIG. 20, unlike the cooling device of FIG. 2, the cooling device 800 has three or more cooling medium passages inside each cooling plate 71. Thereby, the cooling effect on the transport medium S is further enhanced.

21 is a schematic cross-sectional view showing another modified example of the cooling device 800 of FIG.
In the embodiment shown in FIG. 21, unlike the cooling device of FIG. 2, each cooling plate 71 of the cooling device 800 is formed in a flat plate shape without radiating fins. As a result, the transport medium S can be cooled by the cooling plate 71 having a simple structure. The flow passage is not limited to the cooling pipe. For example, the flow paths 72a and 72b may be formed by cutting the cooling plates 71a and 71b. The flow path by cutting is applicable to all the above-mentioned embodiments.

22 is a schematic sectional view showing another modification of the cooling device 800 of FIG.
In FIG. 22, the vicinity of the first inflow port 78a is shown enlarged. Since the pipe-shaped first inlet 78a is engaged with the cooling portion 75a, the peripheral surface on the upper side of the first inlet 78a is not covered with the cooling portion 75a. Therefore, the airflow drawn by the fan 120 also passes through the peripheral surface on the upper side of the first inflow port 78a. If the temperature of this air flow is higher than the temperature of the cooling medium passing through the inside of the first inlet 78a, the cooling medium inside the first inlet 78a may be heated. Therefore, in this modification, a heat insulating member 74c that covers the peripheral surface on the upper side of the first inflow port 78a is provided. As a result, the airflow does not directly contact the peripheral surface of the first inlet 78a, so that it is possible to prevent the cooling medium in the first inlet 78a from being heated. Although the heat insulating member 74c is provided only on the upper side of the first inlet 78a in FIG. 22, the outside of the cooling unit 75a that covers the left and right side surfaces of the first inlet 78a may be covered. Moreover, you may provide the heat insulation member which covers the surrounding surface of the 2nd inflow port 78b upper side.

Although the present invention has been described above with reference to the illustrated example, the present invention is not limited to this. For example, the transport medium may be a sheet-shaped or roll-shaped recording material, and includes an electronic substrate and the like. The image forming apparatus is not limited to the electrophotographic type, and may be an inkjet type.

2 1st conveyance belt 31 2nd conveyance belt 71a 1st cooling plate (1st cooling member)
71b Second cooling plate (second cooling member)
72a First cooling pipe (first flow path)
72b Second cooling pipe (second flow path)
78a 1st inflow port 78b 2nd inflow port 79a 1st discharge port 79b 2nd discharge port 80 Radiator (heat dissipation part)
800 Cooling device S Transport medium

JP, 2012-255964, A

Claims (5)

A first conveyor belt provided on one of the front and back sides of the carrier medium;
The first transport has a first inflow port through which a cooling medium flows in, a first exhaust port through which the cooling medium is exhausted, and a first flow path that flows between the first inflow port and the first exhaust port. A first cooling member that contacts the inner circumference of the belt and cools the carrier medium;
A second conveyor belt provided on the other of the front and back sides of the carrier medium,
The second transport has a second inlet through which the cooling medium flows in, a second outlet for discharging the cooling medium to the outside, and a second flow path flowing between the second inlet and the second outlet. A second cooling member that contacts the inner circumference of the belt and cools the conveyed medium;
A heat radiating portion that radiates heat of the cooling medium discharged from the first cooling member and the second cooling member;
Introducing passages through which the cooling medium radiated by the heat radiating portion flows to the first inlet and the second inlet, respectively.
An exhaust path through which the cooling media discharged from the first exhaust port and the second exhaust port merge and flow to the heat dissipation unit;
Have a,
The position of the first outlet with respect to the first inlet and the position of the second outlet with respect to the second inlet are both located upstream in the transport direction of the transport medium,
The cooling medium flowing through the first inlet and the second inlet flows in the same direction,
The cooling device, wherein the first inflow port, the first exhaust port, the second inflow port, and the second exhaust port are located on one of the sides intersecting the transport direction of the transport medium. .. The first flow path and the second flow path are flow paths in which the cooling medium flows in a direction intersecting the transfer direction of the transfer medium, and the first flow path and the second flow path are provided via a transfer path of the transfer medium. Are facing each other,
The cooling device according to claim 1, wherein: The first cooling member includes a first fin having a ventilation path through which an air flow passes in a direction intersecting a transportation direction of a transportation medium,
The second cooling member includes a second fin having a ventilation path through which an air flow passes in a direction intersecting a transportation direction of the transportation medium.
The cooling device according to claim 1, wherein the cooling device is a cooling device. The introduction path includes a first introduction path that communicates with the first flow path, a second introduction path that communicates with the second flow path, and a flow path branching portion that branches into the first introduction path and the second introduction path. ,,
The flow path branching portion and the discharge path are located on one of the sides intersecting the transport direction of the transport medium ,
The cooling device according to claim 1, wherein the cooling device is a cooling device. An image forming unit that forms an image on a carrier medium,
A cooling device according to any one of claims 1 to 4,
An image forming apparatus comprising:

Images