JP2000109235A - Sheet paper feeder and image forming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheet paper feeder that is not in danger of releasing the fixture of a detachably mounted sheet carrying means (fixing unit) attachable to and detachable from the feeder body even when suffering vibration, impact or the like at the time of transporting products, and an image forming device that employs the sheet carrying device. SOLUTION: Once a fixing unit 7 is installed in a sheet paper feeder body 1, with its fixing securing lever 12 turned to set the fixing unit 7 in place under pressure from a pressure member 17, closing a discharge unit 10 in relation to the device body 1 locates a projected portion 10b of the discharge unit 10 just under the fixing securing lever 12 to check any swing motion thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a sheet conveying device provided in an image forming apparatus such as a printer, a copying machine, and a facsimile.

[0002]

2. Description of the Related Art The configuration of a laser beam printer as an example of a conventional image forming apparatus will be described with reference to FIGS. In FIG. 9, reference numeral 1 denotes an image forming apparatus main body, and a sheet stacking tray 2 for stacking and storing sheets S made of paper, synthetic resin, or the like is provided below the apparatus main body 1.

[0003] The sheets S stacked on the sheet stacking tray 2
Are separated and fed one by one by a feeding roller 3 arranged in a sheet feeding device of the apparatus main body 1 and separating means (not shown). The sheet S separated and fed from the sheet stacking tray 2 is conveyed at a predetermined timing for adjusting the image writing position by the registration roller pair 4, and is formed on the electrophotographic photosensitive drum 6 by the developing means in the process cartridge 5. After the transferred toner image is transferred and the toner image is fixed by the heat roller 8 and the pressure roller 9 in the fixing device 7, the sheet S is swingably provided in the discharge unit 10 to guide the sheet S to the specified discharge port. The transport path is selectively determined by the flapper 11, and is transported and discharged.

As shown in FIG. 10, the fixing device 7 is configured to be detachable from the apparatus main body 1 with the discharge unit 10 opened. On the other hand, as shown in FIG. 11, a fixing fixing lever swingable with respect to the fixing device 7 is provided on both upper sides of the fixing device 7.
When fixing the fixing device 7 to the apparatus main body 1, the fixing fixing lever 12 is rotated to a horizontal position indicated by a broken line in FIG.

Further, guide portions 13 are provided at lower portions on both sides of the fixing device 7.
When the fixing device 7 is inserted into the apparatus main body 1, as shown in FIGS.
guide rail 14 provided in the sheet conveying direction on the inner surface of b
The fixing unit 7 is mounted on the apparatus main body 1 by mounting and sliding the guide unit 13 of the fixing unit 7 thereon.

That is, when the fixing unit 7 is attached and detached, as shown in FIG. 10, the discharge unit 10 is opened to the apparatus main body 1, and the fixing unit 7 is detached from the opening 1a. When the fixing device 7 is mounted, the guide portion 13 of the fixing device 7 is connected to the apparatus main body 1 through the opening 1a where the discharge unit 10 is opened.
And slides along the guide rail 14 in the direction of arrow a in FIG.

When the fixing device 7 is slid in the direction of arrow a in FIG. 10 and pushed in, the guide portion 13 of the fixing device 7 exceeds the end of the guide rail 14 and the tip of the fixing device 7 is
The fixing frame 7a which falls into the fixing unit fixing portion formed by the frame
Is inserted into the slit 1c of the frame 1b of the apparatus main body 1, and the connectors 15 and 16 are connected at the same time.

When the fixing device 7 is further pushed in the direction of arrow a in FIG.
Of the fixing device formed by the frame 1b so as to be horizontal. At this time, the hole 7c formed in the fixing frame 7a of the fixing device 7 is fitted into the positioning projection 1d provided on the frame 1b of the apparatus main body 1, and the positioning of the fixing device 7 with respect to the apparatus main body 1 is completed. .

Reference numeral 17 denotes a pressing member for fixing the fixing device 7 mounted on the apparatus main body 1, which is provided so as to be swingable with respect to the apparatus main body 1, and includes a frame 1 e of the apparatus main body 1 and the pressing member 17. A spring 18 having a predetermined elastic force is provided therebetween.

Then, as shown in FIGS. 12 (a) to 12 (c), the fixing / fixing lever 12 provided on the fixing device 7 is rotated in the direction of arrow b in FIG. Projection 12
a comes into contact with the pressing member 17 and pushes up the pressing member 17 against the elastic force of the spring 18 (see FIG. 12 (b)).
Is locked by being fitted into a concave portion 17a formed on the lower surface of the pressing member 17 (see FIG. 12C), and the elastic force of the spring 18 acts on the fixing device 7 via the pressing member 17 and the fixing / fixing lever 12. Then, the fixing device 7 is pressed and fixed to the apparatus main body 1.

When the discharge unit 10 is closed with the fixing unit 7 fixed, the apparatus can be used.

On the other hand, when detaching the fixing device 7 from the apparatus main body 1, first, the discharge unit 10 is opened, and the fixing fixing lever 12 is rotated in the direction of the arrow c in FIG. After the protrusion 12a of the fixing / fixing lever 12 is removed from the fixing device 7, the handle 7d of the fixing device 7 shown in FIG.
Is lifted, the guide portion 13 is placed on the guide rail 14, and is slid toward the discharge unit 10 to be taken out.

[0013]

However, in the above-mentioned conventional example, the fixing fixing lever 12 of the fixing device 7 is fixed to the main assembly 1 of the apparatus.
It is fixed by the pressing force from the pressing member 17 provided on the product, but the pressing member 17 swings upward against the elastic force of the spring 18 due to vibration or impact when transporting the product. Then, the protrusion 12 a of the fixing fixing lever 12 is
If the fixing device 7 is deviated from 17a, the fixing of the fixing device 7 may be released.

Therefore, it is necessary to open the discharge unit 10 to check whether or not the fixing device 7 has been unlocked during transportation, and if the fixing / fixing lever 12 has come off, fix the fixing / fixing lever 12. There is a problem that extra work is required because it is necessary to operate to the position.

When the apparatus can be used even when the fixing / fixing lever 12 is detached, the fixing unit 7 is used without being noticed that the fixing / fixing lever 12 is detached, and the fixing device 7 is vibrated. This may cause noise or noise, disturbance of an image due to vibration, or a step in the sheet conveyance path, thereby causing a jam of the sheet S.

The present invention solves the above problems,
An object of the present invention is to provide a sheet transporting apparatus and a sheet transporting apparatus in which the fixing of a sheet transporting unit (fixing unit) that is detachable from the apparatus main body is not likely to be released even when subjected to vibration or impact during transportation of a product. To provide an image forming apparatus.

[0017]

According to a first aspect of the present invention, there is provided a sheet conveying apparatus for conveying a sheet, wherein first and second sheet conveying means for conveying the sheet are arranged side by side in the sheet conveying direction. In the conveying apparatus, the first sheet conveying means is configured to be openable and closable with respect to the apparatus main body, and the second sheet conveying means is provided when the first sheet conveying means is open with respect to the apparatus main body. Is configured to be detachable from the apparatus main body, and a pressing means for pressing the second sheet conveying means and fixing the second sheet conveying means to the apparatus main body is provided in the apparatus main body; The second sheet conveying means has a fixing member movable to a position receiving the pressing force from the pressing means and a position not receiving the pressing force from the pressing means, and transfers the second sheet conveying means to the apparatus main body. Wearing When the first sheet conveying means is closed with respect to the apparatus main body while the fixing member is receiving the pressing force from the pressing means, the fixing member of the second sheet conveying means is pressed from the pressing means. It is characterized in that a regulating means for regulating such that it cannot be moved to a position which is not subjected to pressure is provided.

Since the present invention is configured as described above, the second
When the sheet conveying means is mounted on the apparatus main body and the first sheet conveying means is closed with respect to the apparatus main body, the restricting means restricts the movement of the fixing member. However, there is no possibility that the fixing of the second sheet conveying means is released.

Therefore, it is not necessary to open the first sheet conveying means to check whether or not the second sheet conveying means has been unlocked during the transportation, and it takes extra time as in the conventional example. Absent. Further, there is no possibility that vibration or noise is generated in the second sheet conveying means during use, or image disturbance due to the vibration or a step is generated in the sheet conveying path, thereby causing a sheet jam.

In the case where the regulating means is provided in the first sheet conveying means, the number of parts can be reduced since the first sheet conveying means also functions as the regulating means.

Further, when the first sheet conveying means is closed with respect to the apparatus main body, the position of the first sheet conveying means is regulated by the regulating means with respect to the fixing member of the second sheet conveying means. When the second sheet conveying means is mounted on the apparatus main body and the first sheet conveying means is closed with respect to the apparatus main body, the regulating means stops the movement of the fixing member. It is preferable that the restriction be made at the time, because it also serves as the positioning of the first sheet conveying means.

Further, an image forming apparatus according to the present invention has the sheet conveying device and image forming means for forming an image according to image information, and the second sheet conveying means is provided by the image forming means. A fixing unit for fixing an unfixed image formed on a sheet, wherein the first sheet conveying unit is a sheet conveying unit or a sheet discharging unit adjacent to the fixing unit on the downstream side in the sheet conveying direction. I do.

According to the above configuration, when the fixing unit is mounted on the image forming apparatus main body and the sheet conveying unit or the sheet discharging unit is closed with respect to the image forming apparatus main body,
Since the restricting means restricts the movement of the fixing member, there is no possibility that the fixing of the fixing unit will be released even if it receives a vibration or an impact during transportation of the product.

Accordingly, there is no need to open the sheet transport unit or the sheet discharge unit to check whether the fixing unit has been unlocked during transportation, and there is no need for extra work as in the conventional example. In addition, there is no possibility that vibration or noise is generated in the fixing unit during use, or the image is disturbed due to the vibration, or a step is generated in the sheet conveyance path, thereby causing a sheet jam.

[0025]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a sheet conveying apparatus according to the present invention and an image forming apparatus provided with the sheet conveying apparatus, which is applied to a laser beam printer. FIG. 1 is a cross-sectional explanatory view showing a configuration of a first embodiment of an image forming apparatus including a sheet conveying device according to the present invention,
FIG. 2 is a cross-sectional explanatory view showing a state where the sheet discharge unit is opened to the apparatus main body in the first embodiment, FIG. 3 is a cross-sectional explanatory view showing a state where the fixing unit is attached to and detached from the apparatus main body, and FIG. FIG. 5 is a perspective view showing the configuration of a unit.
Is a schematic cross-sectional view showing the state of engagement of the fixing member and the pressing means,
FIG. 6 is a schematic perspective view showing a state in which the fixing member is regulated by the regulating means of the first embodiment. FIG. 7 is a diagram showing a sheet discharge unit in the second embodiment of the image forming apparatus provided with the sheet conveying device according to the present invention. FIG. 8 is a cross-sectional explanatory view showing a state where the fixing member is opened to the main body, and FIG. 8 is a schematic perspective view showing a state where the fixing member is regulated by the regulating means of the second embodiment.

First, the configuration of a first embodiment of an image forming apparatus provided with a sheet conveying device according to the present invention will be described with reference to FIGS. In FIG. 1, reference numeral 1 denotes an image forming apparatus main body including a laser beam printer.
A sheet stacking tray 2 for stacking and storing sheets S made of paper, synthetic resin, or the like is provided at a lower portion of the tray.

Sheets S stacked on the sheet stacking tray 2
Are separated and fed one by one by a feeding roller 3 arranged in a sheet feeding device of the apparatus main body 1 and separating means (not shown). The sheet S separated and fed from the sheet stacking tray 2 is conveyed by a registration roller pair 4 at a predetermined timing for adjusting an image writing position, and is developed by an electrophotographic photosensitive drum by a developing unit in a process cartridge 5 serving as an image forming unit. The toner image formed on 6 is transferred.

Thereafter, the sheet S on which an unfixed image is formed is nipped and conveyed by a heat roller 8 and a pressure roller 9 in a fixing unit 7 serving as a fixing unit, which is a sheet conveying means, and is subjected to a heating and pressing process. In order to guide the sheet S to the designated discharge port after the fixed toner image is fixed, a discharge unit 10 adjacent to the fixing device 7 downstream of the fixing device 7 in the sheet conveyance direction and also serving as the sheet conveyance unit and the sheet discharge unit. A transport path is selectively determined by a flapper 11 that is swingably provided in the inside, and is transported and discharged.

As shown in FIG. 2 and FIG.
Is configured to be openable and closable with respect to the apparatus main body 1 about a rotation shaft 10a. The fixing unit 7 arranged side by side with the discharge unit 10 in the sheet conveying direction is configured such that the discharge unit 10
Is configured to be attachable to and detachable from the apparatus main body 1 when in an open state.

As shown in FIG. 4, a fixing fixing lever 12 is provided on the upper side of the fixing device 7 as a fixing member which is movable by swinging about a rotation shaft 12b with respect to the fixing device 7. A protrusion 12a is fixed via a rotation shaft 12b in a direction orthogonal to the longitudinal direction of the fixing fixing lever 12 (see FIG. 6). Then, when fixing the fixing device 7 to the apparatus main body 1, the fixing fixing lever 12 is rotated to a horizontal position indicated by a broken line in FIG.

Further, guide portions 13 are provided on both lower sides of the fixing device 7.
When the fixing device 7 is inserted into the apparatus main body 1, the fixing device 7 is mounted on a guide rail 14 provided in the sheet conveying direction on the inner surface of the frame 1b of the apparatus main body 1 shown in FIGS. The fixing unit 7 is mounted on the apparatus main body 1 by placing and sliding the guide unit 13.

That is, as shown in FIG. 3, when the fixing unit 7 is attached and detached, the discharge unit 10 is opened to the apparatus main body 1, and the fixing unit 7 is attached and detached from the opening 1a. When the fixing device 7 is mounted, the guide portion 13 of the fixing device 7 is connected to the apparatus main body 1 through the opening 1a where the discharge unit 10 is opened.
3 is slid along the guide rail 14 in the direction of arrow a in FIG.

When the fixing device 7 is slid in the direction of arrow a in FIG. 3 and pushed in, the guide portion 13 of the fixing device 7 exceeds the end of the guide rail 14 and the tip of the fixing device 7 is
The fixing frame 7a which falls into the fixing unit fixing portion formed by the frame
Is inserted into the slit 1c of the frame 1b of the apparatus main body 1, and the connectors 15 and 16 are connected at the same time.

When the fixing device 7 is further pushed in the direction of arrow a in FIG.
Of the fixing device formed by the frame 1b so as to be horizontal. At this time, the hole 7c formed in the fixing frame 7a of the fixing device 7 is fitted into the positioning projection 1d provided on the frame 1b of the apparatus main body 1, and the positioning of the fixing device 7 with respect to the apparatus main body 1 is completed. .

Reference numeral 17 denotes a pressing member serving as pressing means for pressing the fixing device 7 mounted on the apparatus main body 1 to fix the fixing device 7 to the apparatus main body 1, and a rotating shaft with respect to the apparatus main body 1. 17
A spring 18 is provided so as to be swingable about b and has a predetermined elastic force between the frame 1 e of the apparatus main body 1 and the pressing member 17.

Then, as shown in FIGS. 5 (a) to 5 (c), the fixing / fixing lever 12 provided in the fixing unit 7 is rotated in the direction of arrow b in FIG. Projection 12
a comes into contact with the pressing member 17 to push up the pressing member 17 against the elastic force of the spring 18 (see FIG. 5B),
Is locked by being fitted into a concave portion 17a formed on the lower surface of the pressing member 17 (see FIG. 5C), and the elastic force of the spring 18 acts on the fixing device 7 via the pressing member 17 and the fixing / fixing lever 12. Then, the fixing device 7 is pressed and fixed to the apparatus main body 1.

As shown in FIG. 1, a discharge unit 10 which is rotatable about a rotation shaft 10a and is provided on the apparatus main body 1 to open and close the sheet S discharged from the fixing device 7 is provided outside the apparatus. A sheet discharge path 19 serving as a sheet discharge unit for discharging a face-up image face upward on a discharge tray (not shown), and a sheet S discharged from the fixing device 7 are provided at an upper portion of the apparatus main body 1. A sheet conveyance path 20 serving as a sheet conveyance unit for discharging the image face down on the discharge tray 21 is provided. By switching the flapper 11, the discharge direction of the sheet S is switched. I have.

Further, at a position corresponding to the fixing / fixing lever 12 of the fixing unit 7 of the discharge unit 10, the fixing / fixing lever 12 which can be moved between a position where the pressing force is received from the pressing member 17 and a position where the pressing force is not received is pressed. A projection 10b is provided as a restricting means for restricting movement to a position where the pressing force is not applied.

In the present embodiment, the projection 10b is provided with a transport upper guide 10c for guiding the upper surface of the sheet S when the sheet S having passed through the fixing device 7 is transported to the discharge tray 21 on the upper portion of the apparatus main body 1. It is provided integrally at the tip of the main body 1.

Then, the fixing device 7 is mounted on the apparatus main body 1 and
The fixing unit 12 is rotated so that the fixing unit 12 receives a pressing force from the pressing member 17 so that the discharge unit 10
As shown in FIG. 6, the projection 10b provided on the discharge unit 10 when the
5C, the fixing and fixing lever 12 is regulated so as not to rotate in the direction of arrow c in FIG. 5C from the state shown in FIG. 5C. In other words, the protrusion 10b, which is a regulating means, comes into contact with the lower surface of the fixing / fixing lever 12 to prevent rotation of the fixing / fixing lever 12, so that the fixing / fixing lever 12 does not receive a pressing force from the pressing member 17. You cannot move.

A discharge unit with the fixing device 7 fixed
When 10 is closed, the device transits to a usable state.

On the other hand, when removing the fixing device 7 from the apparatus main body 1, first, as shown in FIG. 2, the discharge unit 10 is opened, and the fixing fixing lever 12 is pivoted about the rotation shaft 12b in FIG.
After the protrusion 12a of the fixing fixing lever 12 is removed from the concave portion 17a of the pressing member 17 by rotating in the direction of the arrow c of (c), the handle 7d of the fixing device 7 shown in FIG. Lift the guide unit 13 on the guide rail 14 and slide it toward the discharge unit 10 to take it out of the opening 1a.

According to the above configuration, the fixing device 7 is connected to the apparatus main body 1.
When the discharge unit 10 is closed with respect to the apparatus main body 1 with the fixing and fixing lever 12 in a locked state, the protrusion 10b provided on the discharge unit 10 regulates the movement of the fixing and fixing lever 12, so that the product is There is no danger that the fixing of the fixing device 7 will be released even if it is subjected to vibration or impact during transportation.

Therefore, it is not necessary to open the discharge unit 10 to check whether the fixing device 7 has been fixed during transportation, and there is no need for extra work as in the conventional example. In addition, there is no possibility that vibration or noise is generated in the fixing device 7 during use, an image is disturbed due to the vibration, or a step is generated in the sheet conveyance path, and the sheet S is jammed.

Further, since the projection unit 10b serving as the regulating means is provided integrally with the discharging unit 10, the discharging unit 10 also functions as the regulating means, so that it is not necessary to add a separate part as the regulating means, and the number of parts is reduced. Done, preferred.

Next, a second embodiment of the image forming apparatus provided with the sheet conveying device according to the present invention will be described with reference to FIGS. The same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

In the present embodiment, a positioning portion 10d serving as a regulating means is provided at the end of the upper guide 10c of the discharge unit 10 on the apparatus body 1 side. The positioning part 10d is shown in FIG.
As shown in the figure, a concave portion 10e into which the fixing fixing lever 12 is fitted.
And an inclined surface 10f formed on both sides of the opening of the recess 10e.

Then, the fixing device 7 is mounted on the apparatus main body 1 and
When the fixing unit 12 is locked and the ejection unit 10 is closed with respect to the apparatus body 1, as shown in FIG. 8, the ejection unit 10 is formed on both sides of the opening of the concave portion 10e of the positioning portion 10d provided in the ejection unit 10. The fixing and fixing lever 12 is guided by the inclined surface 10f and fitted and held in the concave portion 10e.
As in the embodiment, the fixing and fixing lever 12 is regulated so that it cannot rotate from the state shown in FIG. 5C in the direction of the arrow c in FIG. 5C.

At this time, the mounting position of the discharge unit 10 is also determined by fitting the positioning portion 10d to the fixing fixing lever 12. As described above, the discharge unit 10 that can be opened and closed with respect to the apparatus main body 1 is provided with a predetermined play with respect to the apparatus main body 1 when opened, and the positioning portion 10 d is fitted to the fixing fixing lever 12 of the fixing device 7 when closed. By performing the positioning of the discharge unit 10 in the vertical direction by the combination, the position of the conveyance path of the sheet discharge port of the fixing unit 7 and the position of the conveyance path of the sheet entrance of the discharge unit 10 can be more accurately positioned. Is possible.

According to the above configuration, the fixing device 7 is connected to the apparatus main body 1.
When the discharge unit 10 is closed with respect to the apparatus main body 1, the positioning portion 10 d serving as a regulating means is fixed to the fixing fixing lever.
Restricting the movement of 12 is preferable because it also serves as positioning of the discharge unit 10 at that time.

[0051]

Since the present invention has the above-described structure and operation, the second sheet conveying means is mounted on the main body of the apparatus.
When the first sheet conveying means is closed with respect to the apparatus main body,
Since the restricting means restricts the movement of the fixing member, there is no possibility that the fixing of the second sheet conveying means will be released even if it receives a vibration, an impact or the like at the time of transporting the product.

Therefore, it is not necessary to open the first sheet conveying means to check whether or not the second sheet conveying means has been unlocked during transportation, and it takes extra time as in the conventional example. Absent. Further, there is no possibility that vibration or noise is generated in the second sheet conveying means during use, or image disturbance due to the vibration or a step is generated in the sheet conveying path, thereby causing a sheet jam.

When the regulating means is provided in the first sheet conveying means, the number of parts can be reduced since the first sheet conveying means also functions as the regulating means.

When the first sheet conveying means is closed with respect to the apparatus main body, the position of the first sheet conveying means is regulated by the regulating means to the fixing member of the second sheet conveying means. When the second sheet conveying means is mounted on the apparatus main body and the first sheet conveying means is closed with respect to the apparatus main body, the regulating means stops the movement of the fixing member. It is preferable that the restriction be made at the time, because it also serves as the positioning of the first sheet conveying means.

Further, according to the configuration of the image forming apparatus of the present invention, when the fixing unit is mounted on the image forming apparatus main body and the sheet conveying unit or the sheet discharging unit is closed with respect to the image forming apparatus main body, the regulating means is provided. Restricts the movement of the fixing member, so that there is no danger that the fixing of the fixing unit will be released even if it is subjected to vibrations or impacts during transportation of the product.

Accordingly, there is no need to open the sheet transport unit or the sheet discharge unit to check whether the fixing unit has been unlocked during transportation, and there is no need for extra work as in the conventional example. In addition, there is no possibility that vibration or noise is generated in the fixing unit during use, or the image is disturbed due to the vibration, or a step is generated in the sheet conveyance path, thereby causing a sheet jam.

[Brief description of the drawings]

FIG. 1 is an explanatory sectional view showing a configuration of a first embodiment of an image forming apparatus provided with a sheet conveying device according to the present invention.

FIG. 2 is an explanatory cross-sectional view showing a state in which a sheet discharge unit is opened to an apparatus main body in the first embodiment.

FIG. 3 is an explanatory sectional view showing a state in which a fixing unit is attached to and detached from an apparatus main body.

FIG. 4 is a perspective view illustrating a configuration of a fixing unit.

FIG. 5 is a schematic cross-sectional view illustrating a state of engagement between a fixing member and a pressing unit.

FIG. 6 is a schematic perspective view showing a state in which a fixing member is regulated by the regulating means of the first embodiment.

FIG. 7 is an explanatory cross-sectional view illustrating a state in which a sheet discharge unit is opened to an apparatus main body in a second embodiment of the image forming apparatus including the sheet conveying device according to the present invention.

FIG. 8 is a schematic perspective view showing a state in which a fixing member is regulated by a regulating means of the second embodiment.

FIG. 9 is a diagram illustrating a conventional example.

FIG. 10 is a diagram illustrating a conventional example.

FIG. 11 is a diagram illustrating a conventional example.

FIG. 12 is a diagram illustrating a conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Device main body, 1a ... Opening, 1b ... Frame, 1c ...
Slit, 1d: Positioning projection, 1e: Frame, 2
... Sheet loading tray, 3 ... Feed roller, 4 ... Registration roller pair, 5 ... Process cartridge, 6 ... Photoreceptor drum, 7 ... Fixing device, 7a ... Fixing frame, 7b ... Protrusion at the tip, 7c ... Hole, 7d ... handle, 8 ... heat roller, 9 ...
Pressure roller, 10 ... Discharge unit, 10a ... Rotating shaft, 10b ...
Protrusion, 10c: Upper guide for conveyance, 10d: Positioning part, 10e
... Recess, 10f inclined surface, 11 flapper, 12 fixing fixing lever, 12a projecting portion, 12b rotating shaft, 12c operating portion, 13
… Guide part, 14… Guide rail, 15, 16… Connector, 17
... Pressing member, 17a ... Recess, 17b ... Rotating shaft, 18 ... Spring, 19
... Sheet discharge path, 20 ... Sheet conveyance path, 21 ... Discharge tray, S ... Sheet

Claims (4)

[Claims] 1. A sheet conveying apparatus in which first and second sheet conveying means for conveying a sheet are arranged side by side in a sheet conveying direction, wherein the first sheet conveying means can be opened and closed with respect to the apparatus main body. And the second sheet conveying means is configured to be detachable from the apparatus main body when the first sheet conveying means is in an open state with respect to the apparatus main body. Pressing means for fixing the second sheet conveying means to the apparatus main body by pressing the second sheet conveying means, wherein the second sheet conveying means receives a pressing force from the pressing means and the pressing means A fixing member movable to a position that does not receive a pressing force from the second sheet conveying means, wherein the second sheet conveying means is mounted on the apparatus main body, and the fixing member receives a pressing force from the pressing means. First A regulating means is provided for regulating that the fixing member of the second sheet conveying means cannot move to a position not receiving the pressing force from the pressing means when the sheet conveying means is closed with respect to the apparatus main body. Sheet conveying device. 2. The sheet conveying apparatus according to claim 1, wherein said regulating means is provided in said first sheet conveying means. 3. The position of the first sheet conveying means when the first sheet conveying means is closed with respect to the apparatus main body, wherein the regulating means regulates a fixing member of the second sheet conveying means. 3. The sheet conveying device according to claim 2, wherein the sheet conveying device is configured to be positioned by the positioning. 4. The image forming apparatus according to claim 1, further comprising: an image forming unit configured to form an image in accordance with image information, wherein the second sheet conveying unit includes the image forming unit. The fixing unit fixes an unfixed image formed on a sheet by the forming unit, and the first sheet conveying unit is a sheet conveying unit or a sheet discharging unit adjacent to the fixing unit on the downstream side in the sheet conveying direction. An image forming apparatus comprising: