JP2021086033A - Image forming apparatus - Google Patents

Abstract

To provide an image forming apparatus comprising a projection that can prevent a reduction in exhaust efficiency of a plurality of exhaust fans even when the apparatus is arranged in proximity to a wall surface.SOLUTION: An image forming apparatus 1 comprises: an image forming unit 5; a first exhaust fan 81; a second exhaust fan 82 that is located below the first exhaust fan 81; a cover 21 that covers the image forming unit 5, a first exhaust fan 81, and a second exhaust fan 82; a first louver 85 that is provided at a position on a right side surface 21A of the cover 21 opposite to the first exhaust fan 81; a second louver 86 that is provided at a position on the right side surface 21A of the cover 21 opposite to the second exhaust fan 82, the position overlapping at least part of the first louver 85 in the fore-and-aft direction; and a projection 87 that is provided in an area B on the right side surface 21A of the cover 21 where the first louver 85 and the second louver 86 overlap each other, and projects most on the right side surface 21A of the cover 21.SELECTED DRAWING: Figure 3

Description

The present invention relates to an image forming apparatus.

Conventionally, an image forming apparatus such as a laser printer is provided with an exhaust fan that exhausts air in the apparatus main body for cooling or the like. Exhaust from the exhaust fan is discharged to the outside through an exhaust port provided on the cover of the main body of the device. Normally, a louver is installed to prevent fingers and foreign matter from entering the exhaust port and to guide the exhaust.

However, when the image forming apparatus is installed, if the side surface of the cover provided with the exhaust port is installed close to the wall surface of the place where the image forming apparatus is installed, the exhaust efficiency is lowered and the apparatus is affected by heat or the like. There is a risk that problems will occur in each part of. As a countermeasure for this, for example, Patent Document 1 discloses a configuration in which a protrusion is provided on the side surface of the cover of the apparatus main body. According to this configuration, when the image forming apparatus is installed close to the wall surface, the protruding portion comes into contact with the wall surface, so that the exhaust port can be prevented from approaching the wall surface by a certain distance or more, and the exhaust efficiency can be improved. The decrease can be suppressed.

Japanese Unexamined Patent Publication No. 2006-243263

However, when the position of the protruding portion is far from the exhaust port as in Patent Document 1, when the side surface of the image forming apparatus is installed in a state of being obliquely close to the wall surface, the protruding portion comes into contact with the wall surface. However, the exhaust port is close to the wall surface, which reduces the exhaust efficiency.

An object of the present invention is to provide an image forming apparatus provided with a protruding portion capable of suppressing a decrease in exhaust efficiency of a plurality of exhaust fans even when they are arranged close to a wall surface.

The image forming apparatus of the present invention includes an image forming portion that forms an image on a sheet, a first exhaust fan, a second exhaust fan located below the first exhaust fan, the image forming portion, and the first exhaust. A cover that covers the fan and the second exhaust fan, a first louver provided at a position facing the first exhaust fan on one side surface of the cover, and facing the second exhaust fan on one side surface of the cover. A second louver provided at a position that overlaps with at least a part of the first louver in a direction orthogonal to the vertical direction and parallel to one side surface of the cover, and the said one on one side surface of the cover. It is provided in a region where the first louver and the second louver overlap, and includes the most protruding portion on one side surface of the cover.

According to the above configuration, when one side surface of the image forming apparatus is installed close to the wall surface of the place where the image forming apparatus is installed, the protruding portion abuts on the wall surface, so that the first louver and the second louver are formed. It is possible to prevent the vehicle from approaching the wall surface more than a certain distance, and it is possible to suppress a decrease in exhaust efficiency. Further, by providing the protruding portion in the area where the first louver and the second louver overlap, the exhaust efficiency is lowered even when the side surface of the image forming apparatus is installed obliquely close to the wall surface. Can be suppressed.

In the above configuration, the first louver and the second louver may have a shape of exhausting upward, and the protruding portion may be located below the second louver.

According to the above configuration, since the exhaust from the first louver and the second louver is not blocked by the protruding portion, it is possible to suppress a decrease in exhaust efficiency.

Further, in the above configuration, a frame body provided on one side surface of the cover and surrounding the second louver may be provided, and the protruding portion may be provided on the lower frame portion of the frame body.

According to the above configuration, the protruding portion can be integrally molded with the frame body, and cost reduction and improvement of design can be realized.

Further, in the above configuration, the protruding portion may be provided over the entire lower frame portion of the frame body.

According to the above configuration, the second louver can be kept away from the wall surface by a certain distance or more over the entire area, and the decrease in exhaust efficiency can be further suppressed.

Further, in the above configuration, the first louver and the second louver may be arranged at intervals in the vertical direction, and the upper frame portion of the frame may have a flat plate shape having no opening.

According to the above configuration, it is possible to prevent the liquid dripping from the first louver from entering the inside of the cover from the second louver.

Further, in the above configuration, the first louver and the second louver may be connected in the vertical direction without any gap.

According to the above configuration, the first louver and the second louver can be enlarged, and the exhaust efficiency can be improved.

According to the present invention, when one side surface of the image forming apparatus is installed close to the wall surface of the place where the image forming apparatus is installed, the protruding portion abuts on the wall surface, whereby the first louver and the second louver are brought into the wall surface. It is possible to prevent the vehicle from approaching more than a certain distance, and it is possible to suppress a decrease in exhaust efficiency. Further, by providing the protruding portion in the area where the first louver and the second louver overlap, the exhaust efficiency is lowered even when the side surface of the image forming apparatus is installed obliquely close to the wall surface. Can be suppressed.

It is a perspective view of the image forming apparatus of one Embodiment. It is the schematic of the central cross section of the image forming apparatus of FIG. It is a main part perspective view of an image forming apparatus. It is a right side view of an image forming apparatus. It is a main part plan view of an image forming apparatus. It is a front view of the main part of an image forming apparatus. FIG. 4 is a cross-sectional view taken along the line AA of FIG. It is a perspective view around the protrusion of the modification 1. It is a top view around the protrusion of the modification 1. It is a perspective view around the protrusion of the modification 2. It is a right side view around the protrusion of the modification 2. It is a top view around the protrusion of the modification 2. It is a right side view around the protrusion of the modification 3.

[Overall configuration of image forming apparatus]
FIG. 1 is a perspective view of the image forming apparatus 1 of one embodiment, and FIG. 2 is a schematic view of a central cross section of the image forming apparatus 1 of FIG. In the following description, the left side in FIG. 2 is defined as the front side of the image forming apparatus 1, the right side in FIG. 2 is defined as the rear side of the image forming apparatus 1, and the front side of the paper surface in FIG. 2 is the right side of the image forming apparatus 1, in FIG. The back side of the paper surface is defined as the left side of the image forming apparatus 1. Further, the upper side and the lower side in FIG. 2 are defined as the upper side and the lower side of the image forming apparatus 1, respectively. In the present embodiment, the left-right direction is the width direction orthogonal to the sheet transport direction.

As shown in FIG. 1, the appearance of the image forming apparatus 1 is formed by the apparatus main body 2 which is a substantially rectangular parallelepiped housing. The apparatus main body 2 has a frame (not shown) that supports each member, and a cover 21 that covers the frame and constitutes the appearance. An discharge tray 211 for supporting the sheet on which the image is formed is provided on the upper surface of the cover 21.

As shown in FIG. 2, the image forming apparatus 1 is a color laser printer that forms an image of a plurality of colors on a sheet S such as a paper or an OHP sheet by an electrophotographic method. The apparatus main body 2 houses a sheet cassette 3, a transport unit 4, an image forming unit 5, a fixing unit 53, a re-transport unit 6, and a drive unit 7. In the apparatus main body 2, the image forming portion 5 is roughly located at the upper and central portions, the fixing portion 53 is behind the image forming portion 5, the conveying portion 4 is located below and behind the image forming portion 5, and the sheet is below the conveying portion 4. The reconveying unit 6, the image forming unit 5, and the driving unit 7 are arranged between the cassette 3, the front portion and the rear portion of the apparatus main body 2, and the lower portion of the seat cassette 3, respectively.

Further, an opening 22 serving as an insertion port for the seat cassette 3 is formed in the lower part of the front surface of the apparatus main body 2. The sheet cassette 3 is a box-shaped body having a seat storage portion 31 whose upper side is open, and supports a plurality of stacked sheets S. The sheet cassette 3 can be inserted and removed from the apparatus main body 2 by moving it in the front-rear direction through the opening 22.

The transport unit 4 is composed of each member arranged along the transport path P1 and transports the sheet S along the transport path P1. The transport path P1 is a path that connects the sheet cassette 3 to the discharge tray 211 via the image forming unit 5. The transport unit 4 is composed of a supply unit 41, a belt transport unit 42, and a discharge unit 43 in this order from the upstream side in the transport direction of the transport path P1.

The supply unit 41 includes a supply roller 411, a separation roller 412, a separation pad 413, a transfer roller 414, 415, and a resist roller 416, 417. The sheets S housed in the sheet cassette 3 are sent out one by one to the transport path P1 by the supply roller 411, the separation roller 412, and the separation pad 413. The sheet S sent out to the transport path P1 is transported toward the image forming unit 5 by the transport rollers 414, 415 and the resist rollers 416 and 417.

The belt transport unit 42 is located between the drive roller 421 that rotates in conjunction with the image forming unit 5, the driven roller 422 that is rotatably arranged at a position separated from the drive roller 421, and the drive roller 421 and the driven roller 422. It is provided with a wound transport belt 423. Then, the transfer belt 423 rotates with the sheet S mounted on the sheet S, so that the sheet S is conveyed along the transfer path P1, sent below the drum unit 51 of the image forming unit 5, and then sent to the fixing unit 53.

The discharge unit 43 includes intermediate discharge rollers 431 and 432, which are a pair of transport rollers arranged between the branch portion P11 of the transport path P1 and the discharge tray 211, and discharge rollers 433 and 434. The intermediate discharge rollers 431 and 432 and the discharge rollers 433 and 434 are switchback rollers configured to be able to switch rotation in the forward direction and the reverse direction. The intermediate discharge rollers 431 and 432 and the discharge rollers 433 and 434 rotate in the forward direction when the sheet S transported from the fixing portion 53 is discharged onto the discharge tray 211, and the sheet S is inverted and transported to the re-conveyance path P2. If you do, it will rotate in the reverse direction.

The image forming unit 5 adopts an electrophotographic type in this embodiment. In addition, an image forming method such as a thermal method or an inkjet method may be used. The image forming unit 5 is of a so-called direct tandem system capable of color printing, and includes four drum units 51 arranged side by side in the front-rear direction and an exposure LED head 52.

Each drum unit 51 is provided corresponding to four color toners of black, yellow, magenta, and cyan. Each drum unit 51 includes a photosensitive drum 511, a developing roller 512, and a transfer roller 513 arranged at each position facing the photosensitive drum 511 with a transport belt 423 interposed therebetween.

In such an image forming unit 5, each photosensitive drum 511 uniformly charged by a charger (not shown) is selectively exposed by the exposure LED head 52. By this exposure, electric charges are selectively removed from the surface of each photosensitive drum 511, and an electrostatic latent image is formed on the surface of each photosensitive drum 511.

A development bias is applied to each developing roller 512, and when the electrostatic latent image formed on each photosensitive drum 511 faces each developing roller 512, the potential difference between the electrostatic latent image and each developing roller 512 causes the potential difference between the electrostatic latent image and each developing roller 512. , Toner is supplied to the electrostatic latent image from each developing roller 512. As a result, a toner image is formed on the surface of each photosensitive drum 511.

The sheet S conveyed toward the image forming unit 5 is conveyed by the transfer belt 423 and sequentially passes between the transfer belt 423 and each photosensitive drum 511. Then, the toner image on the surface of the photosensitive drum 511 is transferred to the sheet S by the transfer bias applied to the transfer roller 513 when facing the sheet S.

The fixing portion 53 is arranged downstream in the transport direction of the four photosensitive drums 511 in the transport path P1. The fixing portion 53 includes a heating roller 531 and a pressure roller 532 that press-contacts the heating roller 531. The heating roller 531 is arranged on the image forming surface side of the sheet S and is rotationally driven in synchronization with the transport belt 423 to apply a transport force to the sheet S while heating the toner.

On the other hand, the pressurizing roller 532 is arranged on the side opposite to the heating roller 531 with the sheet S interposed therebetween, and presses the sheet S toward the heating roller 531. As a result, the pressurizing roller 532 receives a rotational force from the heating roller 531 via the sheet S in contact with the heating roller 531 and rotates drivenly.

Further, the fixing portion 53 includes fixing discharge rollers 533 and 534 arranged downstream of the heating roller 531 and the pressure roller 532 in the transport direction of the sheet S.

The sheet S to which the toner image is transferred by the image forming unit 5 is conveyed to the fixing unit 53, and the toner image is heat-fixed to the sheet S while passing between the heating roller 531 and the pressure roller 532. The sheet S on which the toner image is heat-fixed is conveyed to the intermediate discharge rollers 431 and 432 while being sandwiched by the fixing discharge rollers 533 and 534.

The re-conveying unit 6 is composed of each member arranged along the re-conveying path P2, and conveys the seat S along the re-conveying path P2. The re-transport path P2 branches from the branch portion P11 between the fixing portion 53 and the intermediate discharge rollers 431 and 432 in the transport path P1, passes under the sheet cassette 3, and is between the sheet cassette 3 and the image forming unit 5. This is a route that joins the merging portion P12.

The re-conveying unit 6 includes intermediate transport rollers 611 and 612 and a chute unit 63 along the transport direction of the re-transport path P2. In the state where the rear cover 23 is located in the closed position, the inner surface of the rear cover 23 forms a part of the re-transport path P2. The intermediate transport rollers 611 and 612 are transport rollers that are arranged below the intermediate discharge rollers 431 and 432 and that transport the sheet toward the chute unit 63.

The chute unit 63 is provided below the seat cassette 3 and includes a plurality of transport rollers 633 to 636 for guiding the seat S along the re-transport path P2. The chute unit 63 conveys the sheets S conveyed from the intermediate transfer rollers 611 and 612 to the merging portion P12. The sheet S re-conveyed from the merging section P12 to the image forming section 5 is discharged to the discharge tray 211 by the discharging section 43 after the image is formed on the other surface by the image forming section 5.

As described above, in the image forming apparatus 1, the sheet S on which the image is formed on one surface by the image forming unit 5 is re-conveyed to the image forming unit 5 through the re-conveying path P2 and transferred to the other surface of the sheet S. It is possible to perform so-called double-sided printing that forms an image.

The drive unit 7 is composed of an electric motor or the like, and is arranged above the chute unit 63. The driving force of the driving unit 7 is transmitted to each unit via the driving transmission mechanism.

In such an image forming apparatus 1, an exhaust structure for exhausting air in the apparatus main body 2 to the outside for cooling or the like will be described. In particular, a configuration capable of suppressing a decrease in exhaust efficiency even when the image forming apparatus 1 is arranged close to the wall surface will be described in detail.

[Exhaust structure]
3 is an enlarged view of the main part of FIG. 1, FIG. 4 is a right side view of the image forming apparatus 1, FIG. 5 is a plan view of the main part of the image forming apparatus 1, and FIG. 6 is a front view of the main part of the image forming apparatus 1. 7 is a cross-sectional view taken along the line AA of FIG. The image forming apparatus 1 has, as an exhaust structure, a first exhaust fan 81, a second exhaust fan 82, a first opening 212, a second opening 213, a first frame 83, and a second frame 84. A first louver 85, a second louver 86, and a protruding portion 87 are provided.

The first exhaust fan 81 is, for example, a fan for cooling the image forming portion 5 and the fixing portion 53, and is arranged above the fixing portion 53 (see FIG. 2). The first exhaust fan 81 is arranged in the vicinity of the right side surface 21A of the cover 21 inside the apparatus main body 2. The right side surface 21A is an example of one side surface of the cover. The first exhaust fan 81 is arranged to face the right side surface 21A so as to blow air toward the right side surface 21A.

The second exhaust fan 82 is, for example, a fan for cooling a power supply board (not shown), and is arranged below the first exhaust fan 81. The second exhaust fan 82 is arranged in the vicinity of the right side surface 21A of the cover 21 inside the apparatus main body 2. The second exhaust fan 82 is arranged to face the right side surface 21A so as to blow air toward the right side surface 21A.

The first opening 212 is formed at a position facing the first exhaust fan 81 on the right side surface 21A of the cover 21. The first opening 212 is a substantially rectangular opening formed to have substantially the same size as the first exhaust fan 81. The exhaust gas from the first exhaust fan 81 is blown toward the first opening 212.

The second opening 213 is arranged at a distance from the first opening 212 in the vertical direction, and is formed at a position facing the second exhaust fan 82 on the right side surface 21A of the cover 21. The second opening 213 is a substantially rectangular opening formed to have substantially the same size as the second exhaust fan 82. The exhaust gas from the second exhaust fan 82 is blown toward the second opening 213.

The first frame body 83 is a substantially rectangular frame integrally molded with the cover 21 along the edge portion of the first opening 212. The first frame body 83 projects to the right from the right side surface 21A of the cover 21. The first frame body 83 has an upper frame portion 83A, a lower frame portion 83B, a front frame portion 83C, and a rear frame portion 83D.

As shown in FIG. 4, a plurality of substantially rectangular holes 831 penetrating in the vertical direction are formed in the lower frame portion 83B. The hole 831 can exhaust the exhaust of the first exhaust fan 81 downward, and can discharge the liquid spilled on the upper surface of the image forming apparatus 1 and invading the inside of the cover 21 to the outside. As shown in FIG. 3, the rear frame portion 83D is formed with a plurality of substantially rectangular hole portions 832 penetrating in the front-rear direction. The hole 832 can exhaust the exhaust of the first exhaust fan 81 to the rear.

The second frame body 84 is a substantially rectangular frame integrally molded with the cover 21 along the edge portion of the second opening 213. The second frame body 84 projects to the right from the right side surface 21A of the cover 21. The second frame body 84 has an upper frame portion 84A, a lower frame portion 84B, a front frame portion 84C, and a rear frame portion 84D. The upper frame portion 84A has a flat plate shape having no opening. As a result, it is possible to prevent the liquid discharged from the hole 831 of the first frame 83 from entering the inside of the cover 21 from the upper frame 84A.

As shown in FIG. 4, the lower frame portion 84B is formed with a plurality of substantially rectangular hole portions 841 penetrating in the vertical direction. The hole 841 can exhaust the exhaust of the second exhaust fan 82 downward, and can also discharge the liquid that has been spilled on the upper surface of the image forming apparatus 1 and has entered the inside of the cover 21 to the outside. As shown in FIG. 3, the rear frame portion 84D is formed with a plurality of substantially rectangular hole portions 842 penetrating in the front-rear direction. The hole 842 can exhaust the exhaust of the second exhaust fan 82 to the rear.

The first louver 85 is provided at a position facing the first exhaust fan 81 on the right side surface 21A of the cover 21. Specifically, the first louver 85 is arranged in a region surrounded by the first frame body 83, and is integrally molded with the first frame body 83. The first louver 85 is composed of a plurality of louvers extending in the left-right direction, which are inclined diagonally upward from the inside to the outside of the cover 21. As a result, the exhaust of the first exhaust fan 81 is exhausted diagonally upward along the first louver 85.

The second louver 86 is provided at a position facing the second exhaust fan 82 on the right side surface 21A of the cover 21. Specifically, the second louver 86 is arranged in the region surrounded by the second frame body 84, and is integrally molded with the second frame body 84. The second louver 86 is composed of a plurality of louvers extending in the left-right direction, which are inclined diagonally upward from the inside to the outside of the cover 21. As a result, the exhaust of the second exhaust fan 82 is exhausted diagonally upward along the second louver 86.

The length of the second frame body 84 and the second louver 86 in the front-rear direction is the same as the length of the first frame body 83 and the first louver 85 in the front-rear direction, and the first frame body 83 and the first louver 86 are in the front-rear direction. The louver 85, the second frame 84, and the second louver 86 are provided at the same positions. That is, the second frame body 84 and the second louver 86 are provided at positions that overlap with all of the first frame body 83 and the first louver 85 in the front-rear direction.

Not limited to this embodiment, the lengths of the second frame 84 and the second louver 86 in the front-rear direction may be different from the lengths of the first frame 83 and the first louver 85 in the front-rear direction. Further, the second frame body 84 and the second louver 86 are located at positions facing the second exhaust fan 82 on one side surface of the cover 21, in a direction orthogonal to the vertical direction and parallel to one side surface of the cover 21. It suffices if it is provided at a position overlapping at least a part of the first frame body 83 and the first louver 85.

The protruding portion 87 is provided on the lower frame portion 84B of the second frame body 84. The protruding portion 87 has a curved shape so as to protrude to the right. The protruding portion 87 projects to the rightmost on the right side surface 21A of the cover 21. As a result, when the right side surface 21A is installed close to the wall surface W, the protruding portion 87 abuts on the wall surface W so that the first louver 85 and the second louver 86 do not approach the wall surface more than a certain distance. It is possible to suppress a decrease in exhaust efficiency.

The protruding portion 87 may be provided in the region B (see FIG. 4) where the first louver 85 and the second louver 86 on the right side surface 21A of the cover 21 overlap in the front-rear direction. As a result, even when the right side surface 21A of the image forming apparatus 1 is installed in a state of being obliquely close to the wall surface W, it is possible to suppress a decrease in exhaust efficiency. Further, since the decrease in the exhaust efficiency can be suppressed without increasing the number of the protruding portions 87, the design of the appearance of the image forming apparatus 1 is not impaired.

Further, in addition to the shape in which the first louver 85 and the second louver 86 exhaust upward, the protruding portion 87 is located below the second louver 86. As a result, the exhaust from the first louver 85 and the second louver 86 is not blocked by the protruding portion 87, so that a decrease in exhaust efficiency can be suppressed.

Further, since the projecting portion 87 is provided in the lower frame portion 84B of the second frame body 84, the projecting portion 87 can be integrally molded with the second frame body 84, resulting in cost reduction and improvement of design. Can be realized.

In the present embodiment, the embodiment in which one protrusion 87 is provided has been described, but a form in which a plurality of protrusions are provided may also be provided. Further, in the present embodiment, the embodiment in which two exhaust fans are provided has been described, but the embodiment in which three or more exhaust fans are provided may also be provided.

In the present embodiment, the first louver 85 and the second louver 86 are provided on the right side surface of the cover 21, but the first louver 85 and the second louver 86 are provided on one side surface of the cover 21. For example, it may be the left side surface or the rear side surface of the cover 21.

Hereinafter, the modified example 1 and the modified example 2 of the protruding portion will be described, and the modified example 3 of the first frame body, the second frame body, the first louver, and the second louver will be described. In the description of the modified examples 1 to 3, only the configuration different from that of the image forming apparatus 1 will be described, and the same members will be designated by the same reference numerals and detailed description thereof will be omitted.

[Modification 1]
8 and 9 are views for explaining the protrusion 90 of the first modification. In the first modification, the configurations other than the protruding portion 90 are the same as those of the image forming apparatus 1 described above.

The protruding portion 90 is provided over the entire area of the lower frame portion 84B of the second frame body 84 in the front-rear direction. The protruding portion 90 has a substantially rectangular flat plate shape that protrudes to the right of the second frame body 84. The protruding portion 90 projects to the rightmost on the right side surface 21A of the cover 21. As a result, the same effect as that of the above embodiment can be obtained. Further, since the projecting portion 90 is provided in the entire area of the lower frame portion 84B, the second louver 86 can be prevented from approaching the wall surface by a certain distance or more over the entire area, and a decrease in exhaust efficiency can be further suppressed.

[Modification 2]
10 to 12 are views for explaining the protrusion 91 of the second modification. In the second modification, the configurations other than the protruding portion 91 are the same as those of the image forming apparatus 1 described above.

The protrusion 91 is provided below the second frame 84 on the right side surface 21A of the cover 21, and is provided in a region B where the first louver 85 and the second louver 86 overlap in the front-rear direction. As shown in FIG. 11, the protruding portion 91 has a U-shaped shape when viewed from the right. The protruding portion 91 projects to the rightmost on the right side surface 21A of the cover 21. As a result, the same effect as that of the above embodiment can be obtained.

The protrusion 91 may be provided at any position as long as the first louver 85 and the second louver 86 on the right side surface 21A of the cover 21 overlap in the front-rear direction. For example, it may be provided between the first louver 85 and the second louver 86 or above the first louver 85. The shape of the protruding portion 91 is not particularly limited, and may be, for example, a flat plate shape or a cylindrical shape. Further, the number of projecting portions 91 is not particularly limited, and a plurality of projecting portions 91 may be provided.

[Modification 3]
FIG. 13 is a diagram illustrating the frame body 92 and the louver 93 of the modified example 3. In the third modification, the other configurations are the same as those of the image forming apparatus 1 described above.

The frame body 92 has a form in which the first frame body 83 and the second frame body 84 in the above embodiment are connected in the vertical direction without any gap. The louver 93 has a form in which the first louver 85 and the second louver 86 in the above embodiment are connected in the vertical direction without any gap. Further, the first opening 212 and the second opening 213 are also connected.

That is, since the louver 93 is a form in which the first louver 85 and the second louver 86 are enlarged, the exhaust efficiency can be further improved.

1 Image forming device 2 Device main body 5 Image forming part 21 Cover 81 1st exhaust fan 82 2nd exhaust fan 84 2nd frame body (frame body)
85 1st louver 86 2nd louver 87, 90, 91 Protruding part S sheet

Claims (6)

An image forming part that forms an image on the sheet,
With the first exhaust fan
The second exhaust fan located below the first exhaust fan and
A cover that covers the image forming portion, the first exhaust fan, and the second exhaust fan.
A first louver provided on one side surface of the cover at a position facing the first exhaust fan,
It is provided at a position facing the second exhaust fan on one side surface of the cover, at a position orthogonal to the vertical direction and parallel to one side surface of the cover, and overlapping with at least a part of the first louver. With the second louver
An image forming apparatus provided in a region where the first louver and the second louver overlap on one side surface of the cover, and having the most protruding portion on one side surface of the cover. The first louver and the second louver have a shape of exhausting upward.
The image forming apparatus according to claim 1, wherein the protruding portion is located below the second louver. A frame provided on one side of the cover and surrounding the second louver.
The image forming apparatus according to claim 2, wherein the protruding portion is provided on a lower frame portion of the frame body. The image forming apparatus according to claim 3, wherein the protruding portion is provided over the entire lower frame portion of the frame body. The first louver and the second louver are arranged at intervals in the vertical direction.
The image forming apparatus according to claim 3 or 4, wherein the upper frame portion of the frame body has a flat plate shape having no opening. The image forming apparatus according to any one of claims 1 to 4, wherein the first louver and the second louver are connected to each other in the vertical direction without any gap.

Images