JP2015031750A - Image forming apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the air exhausted from an exhaust port 10h from flowing into an image forming apparatus body 10 again through an intake port 10g to inhibit the cooling of devices, while preventing a deterioration in design of the appearance due to the formation of the intake port 10g and exhaust port 10h in the image forming apparatus body 10.SOLUTION: An image forming apparatus body 10 has an attachment surface 10a to which a post-processing device 200 is attached, the post-processing device 200 performing post-processing to a sheet having been subjected to image forming processing. The attachment surface 10a has formed therein an intake port 10g for taking the air for cooling into the image forming apparatus body 10 and an exhaust port 10h for exhausting the taken air to the outside of the image forming apparatus body 10, and further has an air flow blocking part 90 provided projecting toward the outside of the image forming apparatus body 10 to block the flow of the air directed from the exhaust port 10h to the intake port 10g.

Description

  The present invention relates to an image forming apparatus.

  2. Description of the Related Art Conventionally, there has been known an image forming apparatus that cools devices in the apparatus main body by introducing an air flow into the image forming apparatus main body with a blower fan or the like (see, for example, Patent Document 1). In this apparatus, an air inlet is formed on one side of the image forming apparatus main body, and an air outlet is formed on the other side of the image forming apparatus main body. An axial fan is provided at the exhaust port, and an air flow from the intake port to the exhaust port is formed by driving the axial fan. The airflow cools the devices in the image forming apparatus main body.

  The image forming apparatus main body may be equipped with a post-processing apparatus that performs post-processing on paper after image forming processing (see, for example, Patent Document 2). A pair of metal rings project from the mounting surface of the image forming apparatus main body on which the post-processing apparatus is mounted, and each metal ring engages with a pair of hooks provided on the side surface of the post-processing apparatus. The post-processing device is connected to the image forming apparatus main body.

JP 2003-76253 A JP 2005-89170 A

  By the way, when considering applying the cooling structure shown in Patent Document 1 to Patent Document 2, from the viewpoint of improving the appearance design, an intake port and an exhaust port are formed on the post-processing device mounting surface of the image forming apparatus main body. It is preferable. Accordingly, the intake port and the exhaust port can be hidden by the post-processing device attached to the image forming apparatus main body. Accordingly, it is possible to prevent the appearance design from being damaged by exposing the intake port and the exhaust port to the outside.

  However, in this case, the air discharged from the exhaust port is blocked by the post-processing device and then flows along the post-processing device mounting surface of the image forming apparatus main body. For this reason, a part of the air discharged from the exhaust port again flows into the image forming apparatus main body from the intake port formed on the post-processing apparatus mounting surface, thereby preventing cooling of the equipment in the apparatus main body. There's a problem.

  The present invention has been made in view of the above points, and an object of the present invention is to discharge from the exhaust port while preventing the appearance design from being deteriorated by forming the intake port and the exhaust port in the image forming apparatus main body. The purpose of this is to prevent the air from flowing again through the air inlet and into the image forming apparatus main body and hindering the cooling of the devices.

  An image forming apparatus according to the present invention includes an image forming apparatus main body that performs an image forming process on a sheet. The image forming apparatus main body has a mounting surface on which a post-processing device that performs post-processing on the paper on which the image forming process has been performed is mounted, and the image forming apparatus main body is cooled on the mounting surface. An intake port for taking in the air for use and an exhaust port for discharging the taken-in air out of the image forming apparatus main body are formed, and the mounting surface further includes an outside of the image forming apparatus main body. An air flow blocking portion that protrudes toward the side and blocks an air flow from the exhaust port toward the intake port is provided.

  According to this configuration, both the intake port and the exhaust port are formed on the mounting surface on which the post-processing device in the main body of the image forming apparatus is mounted. Accordingly, the intake port and the exhaust port can be hidden by the post-processing device mounted on the mounting surface. Therefore, it is possible to prevent the appearance design from being deteriorated by forming the air inlet and the air outlet in the image forming apparatus main body.

  In addition, since the air flow blocking portion projects from the mounting surface, the air flow from the exhaust port to the intake port can be blocked by the air flow blocking portion. Therefore, it is possible to prevent the air discharged from the exhaust port from flowing again into the image forming apparatus main body through the intake port and preventing cooling in the apparatus main body.

  The air flow blocking portion is preferably formed so as to cross between the exhaust port and the intake port.

  According to this configuration, the air flow from the exhaust port to the intake port can be reliably blocked by the air flow blocking unit.

  The air flow blocking unit is arranged so that the mounting surface of the image forming apparatus main body is mounted on the mounting surface so as to come into contact with a surface facing the mounting surface of the post-processing device. It is preferable to project outward from the image forming apparatus main body.

  According to this configuration, in a state where the post-processing apparatus is mounted on the mounting surface of the image forming apparatus main body, the protruding end of the air flow blocking unit comes into contact with the facing surface of the post-processing apparatus. Therefore, the air discharged from the exhaust port can be prevented from flowing toward the intake port from the gap between the protruding end of the air flow blocking unit and the facing surface of the post-processing device.

  On the mounting surface of the image forming apparatus main body, a paper discharge port for discharging the paper on which the image forming process has been performed to the outside of the image forming apparatus main body is formed, and on the facing surface of the post-processing apparatus, A paper receiving port for receiving the paper discharged from the paper discharge port is formed, and the airflow blocking unit is also used as a guide unit for guiding the paper discharged from the paper discharge port to the paper receiving port. Is preferred.

  According to this structure, compared with the case where the said airflow interruption | blocking part and the said guide part are separated, a number of parts can be reduced and cost reduction can be achieved.

  The air flow blocking portion is configured to be expandable and contractable in the protruding direction, and an extended state in which an end portion on the protruding side is a free end, and the air flow blocking portion is attached to a mounting surface of the image forming apparatus main body. It is preferable to have a contracted state that is sandwiched between opposing surfaces of the post-processing apparatus and contracted compared to the expanded state.

  According to this configuration, the airflow blocking unit is expanded and contracted according to the separation distance between the mounting surface of the image forming apparatus main body and the facing surface of the post-processing apparatus. Therefore, it is possible to prevent a gap from being generated between the air flow blocking unit and the post-processing device due to a shortage of the protrusion of the air flow blocking unit. Accordingly, the air flow from the exhaust port to the intake port can be reliably blocked by the air flow blocking unit.

  The mounting surface of the image forming apparatus main body is provided with an engaging member for mounting the post-processing device on the mounting surface, and the opposing surface of the post-processing device is engaged with the engaging member. An engaged member is provided, and the air flow blocking portion has an elastic member configured to be extendable and contractable in the protruding direction, and the post-processing device is applied by the urging force of the elastic member in the contracted state. It is preferable that a backlash generated between the engaging member and the engaged member is eliminated by urging the lens in a direction away from the image forming apparatus main body.

  According to this configuration, the separation distance between the mounting surface of the image forming apparatus main body and the facing surface of the post-processing apparatus can be prevented from being varied due to the backlash generated between the engaging member and the engaged member. . As a result, it is possible to prevent variations in the posture of the paper entering the paper receiving port of the post-processing device from the paper discharge port of the image forming apparatus main body.

  According to the present invention, the air discharged from the exhaust port again passes through the intake port and enters the image forming device main body while preventing the appearance design from being deteriorated by forming the intake port and the exhaust port in the image forming apparatus body. It can be prevented from flowing in and hindering cooling of the devices.

FIG. 1 is a schematic view seen from the front side of the apparatus, showing a state in which the post-processing apparatus is mounted on the image forming apparatus according to the present embodiment. FIG. 2 is a side view of the image forming apparatus viewed from the left side of the apparatus. FIG. 3 is a side view of the post-processing device as viewed from the right side of the device. FIG. 4 is an enlarged view showing a state where the engagement pin is engaged with the engagement frame. FIG. 5 is a side view of the airflow blocking unit viewed from the front side of the apparatus. FIG. 6A is a side view seen from the front side of the apparatus showing the extended state of the air flow blocking section, and FIG. 6B is a side view seen from the front side of the apparatus showing the contracted state of the air flow blocking section. . FIG. 7 is a view corresponding to FIG. FIG. 8 is a view corresponding to FIG. FIG. 9 is a view corresponding to FIG. 5 showing another embodiment.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The present invention is not limited to the following embodiment.
Embodiment 1

  FIG. 1 shows a state in which the post-processing device 200 is mounted on the image forming apparatus 100 according to the present embodiment.

  The image forming apparatus 100 includes an image forming apparatus main body 10 and three paper feed cassettes 20 that are detachably attached to the lower part of the image forming apparatus main body 10. Each paper cassette 20 contains printing paper. In the following description, “front side” and “rear side” mean the front side and the rear side (front side and rear side in the direction perpendicular to the sheet of FIG. 1) of the main body of the image forming apparatus, respectively. “Right side” means “left side” and “right side” (left side and right side in the left-right direction in FIG. 1) when viewed from the front side of the image forming apparatus main body.

  The image forming apparatus main body 10 includes a document setting unit 30, a document reading unit 40, and an image forming unit 50. The image forming apparatus main body 10 has a box shape as a whole, and a moving caster 12 is attached to the lower surface thereof.

  The document setting unit 30 includes a contact glass (not shown) fitted in an opening on the upper surface of the image forming apparatus main body 10 and a document pressing cover 31 that covers the upper surface of the contact glass so as to be freely opened and closed.

  The document reading unit 40 is accommodated in the upper part of the image forming apparatus main body 10. The document reading unit 40 has an optical system (not shown) such as a lens and a mirror. The document reading unit 40 reads an image of the document set on the contact glass by this optical system. The document image data read by the document reading unit 40 is stored in a data storage unit (not shown).

  The image forming unit 50 irradiates the surface of the photosensitive drum 51 with laser light corresponding to the document image data stored in the data storage unit or the image data received from the external terminal from the exposure device 53. Form. Next, the image forming unit 50 develops the electrostatic latent image formed on the surface of the photosensitive drum 51 as a toner image by the developing device 54. The image forming unit 50 transfers the toner image onto the sheet by nipping and conveying the sheet conveyed from the sheet cassette 20 by the pair of sheet feeding rollers 71 between the photosensitive drum 51 and the transfer roller 56. The image forming unit 50 presses the paper on which the toner image is transferred between the fixing roller 57 and the pressure roller 58 to fix the toner image on the paper. Then, the image forming process in the image forming unit 50 ends. Reference numeral 52 in the drawing is a charger for charging the surface of the photosensitive drum 51 before exposure, and reference numeral 55 is a cleaning device for removing residual toner on the surface of the photosensitive drum 51.

  The sheet on which the image forming process has been performed by the image forming unit 50 is discharged out of the image forming apparatus main body 10 from the sheet discharge outlet 10f by the discharge roller pair 72 and is supplied to the post-processing apparatus 200.

  As shown in FIG. 2, the paper discharge port 10f is formed on the mounting surface 10a on which the post-processing device 200 in the image forming apparatus main body 10 is mounted. A guide plate 73 that guides the paper discharged from the paper discharge port 10f to the paper receiving port 200f of the post-processing device 200 is attached to the lower side of the paper discharge port 10f. The guide plate 73 extends over the entire image forming apparatus main body 10 in the front-rear direction.

  The mounting surface 10a is further formed with an air inlet 10g for taking cooling air into the image forming apparatus main body 10 and an air outlet 10h for discharging the taken air.

  The intake port 10g is formed in a rectangular shape, and is formed in the center portion in the front-rear direction at the lower end portion of the mounting surface 10a. The air inlet 10g is covered with a louver 74 from the outside of the apparatus. An intake fan 75 is provided on the inward side of the intake port 10g (the right side in FIG. 1). The exhaust port 10h is formed near the lower side of the paper discharge port 10f on the mounting surface 10a. The exhaust port 10h is formed at the center in the front-rear direction on the mounting surface 10a. That is, the exhaust port 10h is formed above the intake port 10g. The exhaust port 10h is covered with a louver 76 from the outside of the apparatus. When the fan 75 is driven, air outside the apparatus main body 10 flows into the apparatus main body 10 from the intake port 10g to cool the image forming unit 50 and its surroundings, and then from the exhaust port 10h to the outside of the apparatus main body 10. It is designed to be discharged (see the white arrow in FIG. 1). Note that the object to be cooled by the air flow is not limited to the image forming unit 50, and may be, for example, a controller or an electronic board arranged outside the image forming unit 50.

  Between the intake port 10g and the exhaust port 10h on the mounting surface 10a, an air flow blocking unit 90 that blocks an air flow from the exhaust port 10h to the intake port 10g is projected. An engagement frame 81 is attached and fixed as an engagement member for mounting the post-processing device 200 on the mounting surface 10a below the air flow blocking portion 90 on the mounting surface 10a. Details of the airflow blocking unit 90 and the engagement frame 81 will be described later.

  The post-processing apparatus 200 is detachably mounted on the mounting surface 10 a of the image forming apparatus main body 10. The post-processing apparatus 200 is configured to perform post-processing such as a stapler process and a sort process on the paper on which the image forming process has been performed in the image forming apparatus main body 10. The post-processing apparatus 200 has a box shape as a whole, and a moving caster 211 is attached to the lower surface thereof. A post-processing mechanism 212 for performing the post-processing is accommodated inside the post-processing apparatus 200.

  As shown in FIG. 3, a sheet receiving port 200 f that receives sheets discharged from the image forming apparatus main body 10 is formed on the facing surface 200 a that faces the mounting surface 10 a in the post-processing device 200. The paper that has been post-processed by the post-processing apparatus 200 is discharged to the paper discharge tray 213 by a pair of discharge rollers (not shown). A pair of engaged pins 84 projecting from each other are arranged at the lower end portion of the facing surface 200a of the post-processing device 200 so as to be spaced in the front-rear direction. The engaged pin 84 constitutes an engaged member that engages with the engaging frame 81 as an engaging member.

  FIG. 4 shows a state in which the engaged pin 84 is engaged with the engagement frame 81. A groove 84f is formed on the peripheral surface of the tip of the engaged pin 84 over the entire circumference. The engagement frame 81 has a plate portion 81a and a pair of upper and lower L-shaped portions 81b having an L-shaped cross section. The plate portion 81a extends in the front-rear direction in parallel with the mounting surface 10a. The upper end and the lower end of the plate portion 81a are fixed to the mounting surface 10a via the pair of L-shaped portions 81b. Engagement holes 82 are formed at both ends in the front-rear direction of the plate portion 81a. The engagement hole 82 has a bowl shape formed by combining a large diameter hole portion 82a and a small diameter hole portion 82b. The shaft diameter of the small diameter hole portion 82b is slightly larger than the shaft diameter of the portion of the engaged pin 84 where the groove portion 84f is formed. The shaft diameter of the large-diameter hole portion 82a is larger than the shaft diameter of the portion excluding the groove portion 84f in the engaged pin 84.

  When the post-processing apparatus 200 is mounted on the mounting surface 10 a of the image forming apparatus main body 10, first, the post-processing apparatus 200 is disposed separately on the left side of the image forming apparatus main body 10. Then, the position of the post-processing device 200 is adjusted so that the axial center position of each engaged pin 84 matches the axial center position of each large-diameter hole portion 82a. Then, after adjusting the position of the post-processing apparatus 200, the post-processing apparatus 200 is moved from the left side toward the right side. Then, when the groove portion 84f of the engaged pin 84 is positioned in the large diameter hole portion 82a, the post-processing device 200 is moved from the front side to the rear side (from the front side to the back side in FIG. 4). If it does so, the groove part 84f of the to-be-engaged pin 84 will engage with the peripheral part of the small diameter hole part 82b in the plate part 81a. Thus, the post-processing device 200 is mounted on the mounting surface 10 a via the engaged pin 84 and the engaging frame 81.

  −Configuration of air flow blocker−

  Next, the configuration of the airflow blocking unit 90 will be described with reference to FIG. The air flow blocking unit 90 includes a pair of upper and lower fixing plates 91 and 92, a slide member 93, and a pair of front and rear compression springs 94.

  Both the fixing plates 91 and 92 protrude from the mounting surface 10a toward the outside of the apparatus (the post-processing apparatus 200 side). The base ends of both the fixing plates 91 and 92 are fixed to the mounting surface 10a. Both the fixing plates 91 and 92 are arranged perpendicular to the mounting surface 10a and are in a positional relationship parallel to each other. Both the fixing plates 91 and 92 extend in the front-rear direction so as to cross between the intake port 10g and the exhaust port 10h. Both fixing plates 91 and 92 are formed over the entire front-rear direction of the image forming apparatus main body 10 (see FIG. 2).

  The slide member 93 is supported so as to be slidable in the protruding direction with respect to both the fixing plates 91 and 92. The slide member 93 is a U-shaped member mounted on the protruding side of both the fixing plates 91, 92, and covers the entire front-rear direction of the image forming apparatus main body 10 when viewed from the mounting side of the post-processing apparatus 200. Is formed. Specifically, the slide member 93 includes a vertical plate portion 93a, an upper slide plate portion 93b, and a lower slide plate portion 93c. The vertical plate portion 93 a extends parallel to the mounting surface 10 a and is connected to the mounting surface 10 a via a compression spring 94. The upper slide plate portion 93b extends from the upper end edge of the vertical plate portion 93a toward the mounting surface 10a. The lower slide plate portion 93c extends from the lower end edge of the vertical plate portion 93a toward the mounting surface 10a. The upper slide plate portion 93b slidably contacts the upper surface of the upper fixed plate 91, and the lower slide plate portion 93c slidably contacts the lower surface of the lower fixed plate 92.

  The pair of compression springs 94 are disposed between the fixed plates 91 and 92 with a space in the front-rear direction. The outer diameter of the compression spring 94 is slightly smaller than the distance between the two fixing plates 91 and 92. Each compression spring 94 is configured to be stretchable in the protruding direction of both the fixing plates 91 and 92. One end portion of each compression spring 94 is fixed to the mounting surface 10 a, while the other end portion is fixed to the vertical plate portion 93 a of the slide member 93.

  Then, the air flow blocking unit 90 is configured to be extendable in the left-right direction of FIG. 5 (that is, the protruding direction of the air flow blocking unit 90) by sliding the slide member 93 with respect to both the fixing plates 91 and 92. Has been.

  Specifically, the air flow blocking unit 90 has an extended state shown in FIG. 6A and a contracted state shown in FIG. 6B. In the extended state, the end of the air flow blocking unit 90 on the protruding side is a free end. The air flow blocking unit 90 is in the extended state when the post-processing device 200 is not mounted on the mounting surface 10 a of the image forming apparatus main body 10. In the extended state, the spring length of the compression spring 94 matches the natural length. When the post-processing device 200 is mounted on the mounting surface 10 a of the image forming apparatus main body 10, the air flow blocking unit 90 is sandwiched between the mounting surface 10 a of the image forming apparatus main body 10 and the facing surface 200 a of the post-processing device 200. As a result, the length is reduced compared to the extended state. In this contracted state, the protruding end of the air flow blocking unit 90, that is, the vertical plate portion 93 a of the slide member 93 is in contact with the opposing surface 200 a of the post-processing device 200. In this contracted state, the spring length of the compression spring 94 is smaller than the natural length. Therefore, in the contracted state of the air flow blocking unit 90, the urging force of the compression spring 94 is transmitted to the post-processing device 200 via the slide member 93, and the post-processing device 200 is separated from the image forming apparatus main body 10 ( It is energized to the left. As a result, there is no backlash in the left-right direction generated between the engaged pin 84 and the engaging frame 81.

  As described above, in the first embodiment, both the intake port 10g and the exhaust port 10h are formed on the mounting surface 10a on which the post-processing device 200 in the image forming apparatus main body 10 is mounted. Therefore, the intake port 10g and the exhaust port 10h can be hidden by the post-processing device 200 mounted on the mounting surface 10a. Therefore, it is possible to prevent the appearance design from being deteriorated by forming the air inlet 10g and the air outlet 10h in the image forming apparatus main body 10.

  In the first embodiment, the mounting surface 10a protrudes outward from the image forming apparatus main body 10 and blocks an air flow from the exhaust port 10h toward the intake port 10g. 90 is protruded.

  According to this configuration, the air flow from the exhaust port 10h toward the intake port 10g is blocked by the air flow blocking unit 90 and discharged toward the front side or the rear side of the image forming apparatus main body 10 (FIGS. 1 and 2). See the white arrow). Therefore, it is possible to prevent the air discharged from the exhaust port 10h from flowing again into the image forming apparatus main body 10 through the intake port 10g and preventing cooling in the apparatus main body 10.

  In the first embodiment, the air flow blocking section 90 is formed so as to cross between the exhaust port 10h and the intake port 10g.

  Therefore, the air flow from the exhaust port 10 h toward the intake port 10 g can be reliably blocked by the air flow blocking unit 90.

  In the first embodiment, the slide member 93 mounted on the projecting side of the airflow blocking unit 90 is rearward in a state where the post-processing device 200 is mounted on the mounting surface 10a of the image forming apparatus main body 10. It is comprised so that the opposing surface 200a of the processing apparatus 200 may be contact | abutted.

  According to this configuration, the air exhausted from the exhaust port 10 h passes through the gap between the protruding end of the air flow blocking unit 90 (the vertical plate portion 93 a of the slide member 93) and the facing surface 200 a of the post-processing device 200. It is possible to prevent the flow toward the intake port 10g.

  Moreover, in the said Embodiment 1, the said airflow interruption | blocking part 90 is comprised so that expansion-contraction is possible in the protrusion direction (left-right direction of FIG. 6), and the expansion | extension state (the edge part on the protrusion side is made into a free end ( 6 (a)) and the air flow blocking section 90 is sandwiched between the mounting surface 10a of the image forming apparatus main body 10 and the facing surface 200a of the post-processing apparatus 200, compared to the extended state. It has a reduced length state (see FIG. 6B).

  According to this configuration, the air flow blocking unit 90 is expanded and contracted according to the separation distance between the mounting surface 10 a of the image forming apparatus main body 10 and the facing surface 200 a of the post-processing device 200. Therefore, it is possible to prevent a gap from being generated between the air flow blocking unit 90 and the post-processing device 200 due to a shortage of the protruding amount of the air flow blocking unit 90. Therefore, the air flow from the exhaust port 10 h toward the intake port 10 g can be reliably blocked by the air flow blocking unit 90.

  In the first embodiment, the air flow blocking section 90 includes the compression spring 94 configured to be extendable and contractable in the projecting direction. In the contracted state, the air flow blocking section 90 is urged by the urging force of the compression spring 94. By urging the processing device 200 away from the image forming apparatus main body 10, the play between the engagement frame 81 and the engaged pin 84 is eliminated.

According to this configuration, the separation distance between the mounting surface 10 a of the image forming apparatus main body 10 and the facing surface 200 a of the post-processing device 200 varies due to backlash generated between the engaging frame 81 and the engaged pin 84. Can be prevented. As a result, it is possible to prevent variations in the approaching posture of the paper entering the paper receiving port 200f of the post-processing device 200 from the paper discharge port 10f of the image forming apparatus main body 10.
<< Embodiment 2 >>

  7 and 8 show the second embodiment. In the second embodiment, the arrangement of the air flow blocking section 90 and the exhaust port 10h is different from that of the first embodiment. In the following embodiments, the same parts as those in FIGS. 1 and 2 are denoted by the same reference numerals, and detailed description thereof is omitted.

  That is, in the present embodiment, the exhaust port 10h is formed above the paper discharge port 10f. The airflow blocking unit 90 is disposed along the lower side of the sheet discharge outlet 10f. The air flow blocking unit 90 is also used as a guide unit that guides the paper discharged from the paper discharge port 10f to the paper receiving port 200f of the post-processing device 200. Therefore, it is not necessary to provide the guide plate 73 separately from the airflow blocking unit 90 as in the first embodiment. Therefore, the number of parts can be reduced and the cost can be reduced. Further, the air flow from the exhaust port 10h to the intake port 10g is blocked by the air flow blocking unit 90 as indicated by the white arrow in FIG. 7, so that the air discharged from the exhaust port 10h is again taken into the intake port 10g. It is possible to prevent the liquid from flowing into the apparatus main body 10.

  << Other embodiments >>

  In each of the above embodiments, the electrophotographic image forming apparatus 100 is employed. However, the present invention is not limited to this, and for example, an ink jet image forming apparatus 100 may be employed.

  In each of the above-described embodiments, the airflow blocking unit 90 is configured to be extendable / contractable by sliding the slide member 93 with respect to both the fixing plates 91 and 92, but is not limited thereto. As shown in FIG. 9, the air flow blocking portion 90 may be configured to be expanded and contracted by being configured with a bellows member 95.

  As described above, the present invention is useful for an image forming apparatus in which an intake port and an exhaust port are formed in the main body of the image forming apparatus, and particularly useful for an image forming apparatus configured to be equipped with a post-processing device. It is.

DESCRIPTION OF SYMBOLS 10 Image forming apparatus main body 10g Intake port 10h Exhaust port 81 Engagement frame (engagement member)
84 engaged pin (engaged member)
90 Air flow blocking part (guide part)
94 Compression spring (elastic member)
100 Image forming apparatus 200a Opposing surface 200f Paper receiving port 200 Post-processing apparatus

Claims (6)

An image forming apparatus including an image forming apparatus main body that performs image forming processing on paper,
The image forming apparatus main body has a mounting surface on which a post-processing apparatus that performs post-processing on the paper subjected to the image forming process is mounted;
The mounting surface is formed with an intake port for taking in cooling air into the image forming apparatus main body and an exhaust port for discharging the taken-in air out of the image forming apparatus main body.
The image forming apparatus further includes an air flow blocking portion that protrudes outward from the image forming apparatus main body and blocks an air flow from the exhaust port toward the intake port. . The image forming apparatus according to claim 1.
The image forming apparatus, wherein the air flow blocking unit is formed to cross between the exhaust port and the intake port. The image forming apparatus according to claim 1 or 2,
The air flow blocking unit is arranged so that the mounting surface of the image forming apparatus main body is mounted on the mounting surface so as to come into contact with a surface facing the mounting surface of the post-processing device. An image forming apparatus protruding outward from the image forming apparatus main body. The image forming apparatus according to claim 3.
On the mounting surface of the image forming apparatus main body, a paper discharge port for discharging the paper on which the image forming process has been performed to the outside of the image forming apparatus main body is formed,
A paper receiving port for receiving paper discharged from the paper discharge port is formed on the facing surface of the post-processing device,
The image forming apparatus, wherein the air flow blocking unit is also used as a guide unit that guides the sheet discharged from the sheet discharge port to the sheet receiving port. The image forming apparatus according to claim 3 or 4,
The air flow blocking portion is configured to be expandable and contractable in the protruding direction, and an extended state in which an end portion on the protruding side is a free end, and the air flow blocking portion is attached to a mounting surface of the image forming apparatus main body. An image forming apparatus having a contracted state sandwiched between opposite surfaces of the post-processing device and contracted in comparison with the expanded state. The image forming apparatus according to claim 5.
An engagement member for mounting the post-processing device on the mounting surface is provided on the mounting surface of the image forming apparatus main body.
An engaged member that engages with the engaging member is provided on the facing surface of the post-processing device,
The air flow blocking portion has an elastic member configured to be extendable and contractable in the protruding direction, and in the contracted state, the post-processing device is separated from the image forming apparatus main body by the urging force of the elastic member. An image forming apparatus configured to eliminate backlash generated between the engaging member and the engaged member by urging in the direction to be engaged.

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