JP2012185337A - Image forming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image forming device which reduces component cost, facilitates downsizing of a product, has a simple structure, can be intuitively operated without astonishing a user, and can stabilize gravity center balance.SOLUTION: An image forming device 1 comprises: a printer part 2 for forming an image on a recording material S; and a scanner part 3 which is arranged above the printer part 2, has a document table 14 where a document is placed and a pressing plate 13 for pressing the document to the document table 14, and can read the document. The scanner part 3 is provided rotatable relative to the printer part 2, and the pressing plate 13 is provided rotatable in the same direction as the scanner part 3 relative to the document table 14. The image forming device 1 also comprises a rotation stop mechanism which is provided in the printer part 2 and which stops rotation of the pressing plate 13 when the pressing plate 13 is in an opening position.

Description

  The present invention relates to an image forming apparatus including an image reading unit having a pressure plate and a document table.

  Some image forming apparatuses have a configuration in which an image reading unit having a pressure plate and a document placing table is attached to an upper portion of the image forming unit so as to be freely opened and closed. An invention described in Patent Document 1 is disclosed as an invention relating to such an image forming apparatus. The image forming apparatus described in Patent Document 1 is configured such that the document placement table and the pressure plate are openable and closable with respect to the image forming unit by a connecting mechanism, and the connecting mechanism has a link that keeps the angle of the pressure plate to the image forming unit constant. . According to such a configuration, it is described that when the pressure plate or the document placing table is opened, the center of gravity is not excessively shifted to the rear of the apparatus main body, so that the maintenance parts can be replaced safely and reliably.

JP 2008-262037 A

  However, the lock mechanism described in Patent Document 1 has an extra part cost and requires a space for disposing the parts of the lock mechanism in the product, which is a restriction when the product is downsized.

  Further, the lock mechanism described in Patent Document 1 has a concern that when the pressure plate is opened and a force is further applied to open the pressure plate, the document table is also opened to surprise the user. In particular, in the small and medium-sized image forming apparatuses, since the weight of the document table is light, when the platen is rotated and opened upward, a force is applied in the direction of opening the platen. There is a concern that it will be transmitted to the table and the document table will be opened together, which will surprise the user.

  In order to eliminate these concerns, when the platen is open, the document table is locked against opening with respect to the image forming unit. When the platen is open, the platen is placed on the platen. On the other hand, it is also conceivable to lock so that it does not open. However, if the user tries to open the document table with the pressure plate opened, the pressure plate needs to be closed once to release the lock, and this operation may not be intuitively operated by the user.

  Therefore, in view of the above circumstances, the present invention reduces the cost of parts, helps reduce the size of the product, can be intuitively operated without surprise to the user with a simple configuration, and can stabilize the balance of the center of gravity. An object is to provide a forming apparatus.

  In order to achieve the above object, an image forming apparatus according to the present invention includes an image forming unit that forms an image on a recording material, a document placing table that is disposed above the image forming unit and places a document, and the document placing table. An image reading unit having a pressing member for pressing the document and capable of reading the document, wherein the image reading unit is provided to be rotatable with respect to the image forming unit, An image forming apparatus provided to be rotatable in the same direction as the image reading unit with respect to a document placing table, the image forming unit being provided in the image forming unit, and when the pressing member is in an open position, A rotation stopping mechanism for stopping the rotation is provided.

  According to the present invention, the cost of parts is reduced, the product is miniaturized, it can be operated intuitively with a simple configuration without surprise to the user, and the center of gravity balance is stabilized.

1 is a perspective view illustrating a configuration of an image forming apparatus according to Embodiment 1. FIG. 2 is a cross-sectional view illustrating an internal structure of the image forming apparatus. FIG. FIG. 2 is a side view showing a configuration of an image forming apparatus when a document table is opened alone (opened integrally with a pressure plate). FIG. 3 is a side view showing the configuration of the image forming apparatus when each of the pressure plate and the document table is opened at different angles. FIG. 6 is a side view illustrating a configuration of an image forming apparatus according to a second embodiment. It is a side view showing a configuration when each of the document table and the pressure plate is opened at different angles.

  Exemplary embodiments of the present invention will be described in detail below based on examples with reference to the drawings. However, the dimensions, materials, shapes, and relative arrangements of the components described in this embodiment should be appropriately changed according to the configuration of the apparatus to which the invention is applied and various conditions. It is not intended to limit the scope to the following embodiments.

  FIG. 1 is a perspective view illustrating a configuration of an image forming apparatus 1 according to the first embodiment. FIG. 2 is a cross-sectional view showing the internal structure of the image forming apparatus 1. The image forming apparatus 1 according to the first embodiment will be described with reference to FIGS. 1 and 2. As shown in FIG. 1, the image forming apparatus 1 includes a printer unit 2 and a scanner unit 3.

  The printer unit 2 serving as an “image forming unit” forms an image on the recording material S (see FIG. 2). The scanner unit 3 that is an “image reading unit” is disposed above the printer unit 2 and includes a document table 14 that is a “document mounting table” on which a document is placed, and a “pressing member” that presses the document against the document table 14. ], And the original can be read.

  The scanner unit 3 is provided to be rotatable with respect to the printer unit 2, and the pressure plate 13 is provided to be rotatable with respect to the document table 14 in the same direction as the scanner unit 3. Further, the image forming apparatus 1 includes a rotation stopping mechanism. The rotation stop mechanism is a mechanism that is provided in the printer unit 2 and stops the rotation of the pressure plate 13 when the pressure plate 13 is in the open position. In particular, in Example 1, the “rotation stop mechanism” is the abutting surface 17. The abutting surface 17 is formed on a shaft support portion 11a that is a “support” that extends from the frame 11 of the printer unit 2 and supports the scanner unit 3, and the back surface of the pressure plate 13 abuts when the pressure plate 13 is in the open position. . This will be described later.

  The image forming apparatus 1 is a printer / copier that forms an image in the printer unit 2 in accordance with image information from an external device such as a host computer that is communicably connected or document image information read by the scanner unit 3. Function as. The image forming apparatus 1 is a multifunction device that can also function as a scanner device that transmits document image information read by the scanner unit 3 to an external device that is communicably connected.

  As shown in FIG. 2, the scanner unit 3 is disposed above the printer unit 2, and is disposed in a state where the discharge stacking unit 4 is sandwiched between the scanner unit 3 and the printer unit 2. The scanner unit 3 is attached to the printer unit 2 so as to be rotatable (openable and closable) about a rotation center A at the rear part. Further, a link member 5 (see FIG. 1) for connecting the printer unit 2 and the scanner unit 3 is provided at the front portion thereof.

  Next, the internal structure of the printer unit 2 will be described. The printer unit 2 is a laser beam printer that records an image on the recording material S by an electrophotographic method. The printer unit 2 generally forms an image with the following configuration and operation.

  As shown in FIG. 2, the recording materials S stacked on the feeding tray 6 are separated one by one by the feeding roller 7 and the separation roller 8 based on a print signal from a host computer (not shown). To be fed. The separated recording material S is conveyed to the transfer unit 51 by the conveying roller pair 9. The transfer unit 51 includes a process cartridge 59 that is unitized and detachable from the printer unit 2, that is, the image forming apparatus 1, a transfer roller 57, and the like. The process cartridge 59 removes the photosensitive drum 58, a charging device (not shown) that charges the photosensitive drum 58, a developing device (not shown) that develops the latent image on the photosensitive drum 58 with toner, and residual toner on the photosensitive drum 58. And a cleaner or the like for housing.

  The laser scanner unit 60 is configured by unitizing a polyhedral mirror 61, a polyhedral mirror rotating motor, a laser unit, and the like. A laser beam L based on image information is irradiated from the laser scanner unit 60 and exposed on the photosensitive drum 58 to form a latent image by an electrophotographic method. The latent image is developed with toner as a developer by a developing unit, and the developed toner image is transferred onto a recording material S conveyed from the photosensitive drum 58 by a transfer roller 57. Thereafter, the toner remaining on the photosensitive drum 58 is cleaned by a cleaner.

  After the transfer of the toner image, the recording material S is conveyed to a fixing unit 62 composed of a fixing film 64 and a pressure roller 65 pressed against the fixing film 64, where the transferred toner image is heated and heated. It is fixed. The recording material S on which the toner image is fixed is conveyed by the discharge roller pair 63 and is discharged to the discharge stacking unit 4 above the printer unit 2.

  The discharge stacking unit 4 is provided on the upper surface of the door 10 as a part of the casing of the printer unit 2. Further, the door 10 is disposed on the frame 11 of the printer unit 2 so as to be rotatable around a rotation center C. Then, by opening the door 10 with respect to the main body of the printer unit 2, the inside of the printer unit 2 can be opened, and the process cartridge 59 can be accessed, the recording material S can be jammed, and the like.

  The scanner unit 3 includes a document table 14 on which a document is placed and a pressure plate 13 that holds the document placed on the document table 14 from above. The document table 14 has a carriage (not shown) that can move to scan the document placed on the document table 14, and can rotate about a rotation center A with respect to the printer unit 2. The pressure plate 13 is disposed on the upper surface of the document table 14 and can be opened and closed with respect to the document table 14 around a rotation center coaxial with the rotation center A. Therefore, the rotation direction of the document table 14 and the rotation direction of the pressure plate 13 are the same. When the scanner unit 3 includes an automatic document feeder (hereinafter referred to as ADF), the ADF is attached integrally with the pressure plate 13.

  FIG. 3A is a side view showing the configuration of the image forming apparatus 1 when the document table 14 is opened alone (opened integrally with the pressure plate 13). FIG. 3B is a side view showing the configuration of the image forming apparatus 1 when the pressure plate 13 is opened alone. FIG. 4 is a side view showing the configuration of the image forming apparatus 1 when the pressure plate 13 and the document table 14 are opened at different angles. The rotation mechanism (opening / closing mechanism) of the scanner unit 3 will be described with reference to FIG.

  Here, returning to FIGS. 1 and 2, the configuration and operation of the rotation mechanism of the scanner unit 3 will be described. As shown in FIG. 1, a shaft support portion 11 a of the frame 11 extends upward at a rear portion of the upper portion of the printer portion 2. The shaft support portion 11a holds a shaft 21 which is a “document table rotation holding shaft”. On the other hand, a support unit 20 that is a “document table rotation support unit” is provided on the back surface of the document table 14. A shaft 21 is inserted through the support portion 20. Therefore, the document table 14 can be rotated with respect to the printer unit 2 around the rotation center A (axis 21). Further, since the platen 14 is rotated, the pressure plate 13 on the document table 14 is rotated, so that the scanner unit 3 is rotated as a whole.

  A shaft insertion portion 25 and a support convex portion 26 are provided on the back surface of the document table 14. A shaft 16 that is a “pressure plate rotation holding portion” is inserted into the shaft insertion portion 25, and a support convex portion 26 supports the shaft 16. On the other hand, a support portion 15 that is a “pressure plate rotation support portion” is provided on the back side of the pressure plate 13. The shaft 16 is also inserted into the support portion 15. For this purpose, the pressure plate 13 is rotatable about a rotation center A (axis 16) with respect to the document table 14. In addition, the shaft support portion 11a of the frame 11 of the printer unit 2 is formed with an abutting surface 17 against which the back surface of the pressure plate 13 abuts when the pressure plate 13 is in the open position. The abutting surface 17 will be described later.

  With reference to FIG. 3A, a mechanism and a rotating operation (opening / closing operation) in which the document table 14 and the pressure plate 13 rotate (open / close) integrally will be described. Here, the support unit 20 side of the document table 14 is referred to as a “base end portion of the document table 14”, and the opposite side of the document table 14 from the support unit 20 is referred to as a “tip portion of the document table 14”.

  As shown in FIG. 3A, the printer unit 2 and the scanner unit 3 are connected by a link member 5. The link member 5 mainly includes a lower link 22, an upper link 23, and a torsion coil spring (hereinafter referred to as “spring 30”). One end of the lower link 22 is rotatably supported by the shaft support portion 11 a of the frame 11 of the printer unit 2. On the other hand, one end of the upper link 23 is rotatably supported by the lower part of the document table 14. The other end of the lower link 22 and the other end of the upper link 23 are joined so as to be rotatable. By being joined in this way, the lower surface of each document table 14, the shaft support portion 11 a of the frame 11 of the printer unit 2, the lower link 22, and the upper link 23 are rotatably supported by the rotation support portion. There are four-bar links.

  The spring 30 urges the lower link 22 in the direction of arrow V with the axis provided at the lower link joint 28 as the axis, and the upper link 23 as arrow with the axis provided at the upper link joint 29 as the axis. It is attached to urge in the direction of V. Further, the lower link 22 is provided with a rotation stopper for preventing the upper link 23 from rotating more than a predetermined amount with respect to the lower link 22.

  During steady operation, the scanner unit 3 is closed with respect to the printer unit 2 as shown in FIG. When the inside of the printer unit 2 is opened for access to the process cartridge 59 or jamming of the recording material S, the scanner unit 3 is first lifted and opened as shown in FIG. After being held, the door 10 is lifted and opened.

  The operation of lifting the scanner unit 3 and holding it in the open state will now be described. First, the user lifts the front end of the document table 14 of the scanner unit 3. As a result, as shown in FIG. 3A, the scanner unit 3 rotates in the opening direction W around the rotation center A. At this time, as the scanner unit 3 rotates, the link member 5 rotates on a predetermined locus.

  Then, when the lower link 22 and the upper link 23 rotate by a predetermined amount, the upper link 23 comes into contact with the abutment surface provided on the lower link 22 and the movement of the four-link is stopped. The position of the scanner unit 3 at this time is the open position. Further, the spring 30 attached to the link member 5 exerts a force to open the lower link 22 and the upper link 23 in the direction of the arrow V, and the open state of the scanner unit 3 is maintained by stretching.

  Next, an operation for closing the scanner unit 3 will be described. The user pushes down the tip of the scanner unit 3 and applies a force exceeding the force of holding the scanner unit 3 by the spring 30 attached to the link member 5. As a result, the scanner unit 3 rotates and closes in the closing direction X around the rotation center A.

  With reference to FIG. 3B, a mechanism for rotating (opening / closing) the pressure plate 13 and a rotating operation (opening / closing operation) will be described. Here, the support plate 15 side of the pressure plate 13 is referred to as a “base end portion of the pressure plate 13”, and the opposite side of the pressure plate 13 from the support portion 15 is referred to as a “tip portion of the pressure plate 13”. When performing an operation of reading a document using the scanner unit 3, the pressure plate 13 of the scanner unit 3 is lifted and opened, and then the document is placed on the document table 14, and then the pressure plate 13 is closed to read the document. Perform the pressing operation.

  The operation of lifting the pressure plate 13 and holding it in the open state will now be described. When the user opens the pressure plate 13, the tip of the pressure plate 13 is lifted. As a result, as shown in FIG. 3B, the pressure plate 13 rotates in the opening direction W around the rotation center A.

  When the pressure plate 13 rotates by a predetermined amount, the pressure plate 13 abuts against the abutting surface 17 provided on the shaft support portion 11a of the frame 11 of the printer unit 2, and the pressure plate 13 cannot be rotated any more. The position of the pressure plate 13 at this time is the open position. Further, when the pressure plate 13 is in the open state, the gravity center Ga of the pressure plate 13 is behind the product with respect to the rotation center A of the pressure plate 13. Therefore, considering the moment around the rotation center A of the pressure plate 13, it can be seen that the pressure plate 13 is applied in the opening direction by the force Fa due to the weight of the pressure plate 13. Thereby, the open state of the pressure plate 13 is maintained.

  Here, a force Fb is applied in a direction W for further opening the pressure plate 13 from a position where the pressure plate 13 is in the open state. This force Fb is transmitted to the abutting surface 17 of the pressure plate 13. Since the abutting surface 17 is provided on the shaft support portion 11 a of the frame 11 of the printer unit 2, the force applied to the pressure plate 13 is directly transmitted to the printer unit 2. Therefore, the force Fb is not transmitted to the document table 14. Therefore, even when a force Fb is applied in the direction W for further opening the pressure plate 13 from a position where the pressure plate 13 is in the open state, a configuration that does not cause the user to be surprised by opening the document table 14 is achieved.

  Next, the operation of closing the pressure plate 13 will be described. When the user closes the pressure plate 13, the front end of the pressure plate 13 is pushed down. Thereby, from the state shown in FIG. 3B, the pressure plate 13 rotates and closes in the closing direction X around the rotation center A.

  In the above description of the rotation opening / closing operation of the document table 14 and the pressure plate 13, the document table 14 is opened / closed with the pressure plate 13 closed, and the pressure plate 13 is opened / closed with the document table 14 closed. In addition, the platen 14 can be opened and closed when the pressure plate 13 is held open, and the platen 13 can be opened and closed when the platen 14 is held open. Conceivable. A case of performing these two operations will be described.

  First, the case where the document table 14 is opened and closed when the pressure plate 13 is held in the open state as shown in FIG. 3B will be described. Even when the pressure plate 13 is held open, the document table 14 can be opened and held by lifting the tip of the document table 14. Similarly, the document table 14 can be closed by pushing down the tip.

  Here, the abutment surface 17 against the pressure plate 13 is provided on the shaft support portion 11 a of the frame 11 of the printer unit 2, so that the pressure plate 13 is held directly from the printer unit 2. Therefore, even if the document table 14 is opened and closed, the position of the pressure plate 13 in the open state does not move to the rear side of the product as shown in FIG. Therefore, the balance of the center of gravity of the image forming apparatus 1 is stable regardless of whether the pressure plate 13 or the document table 14 is opened or closed. Even when the weight of the pressure plate 13 that includes the ADF and is integrally attached to the ADF is large, the balance of the center of gravity is exactly the same.

  Further, the rotation center (axis 16) of the pressure plate 13 and the rotation center (axis 21) of the document table 14 are coaxial. Therefore, the rotation center (shaft 16) of the pressure plate 13 is constant regardless of the opening / closing angle of the document table 14. Therefore, even when the document table 14 is opened and closed while the pressure plate 13 is kept open, the position (posture) of the pressure plate 13 in the opened state is constant regardless of the opening and closing angle of the document table 14. As a result, there is no concern that the pressure plate 13 in the open state closes by the opening / closing operation of the document table 14 and surprises the user.

  Next, a case where the pressure plate 13 is opened and closed with the document table 14 opened as shown in FIG. Even when the document table 14 is held open, the pressure plate 13 can be opened and held by lifting the tip of the pressure plate 13. Similarly, it can be closed by pushing down the tip of the pressure plate 13. Here, as already described, the position where the pressure plate 13 is held in the open state is constant regardless of whether the document table 14 is opened or closed.

  As described above, the rotation opening / closing operation of the document table 14 and the pressure plate 13 can be freely performed regardless of the opening / closing positions of the document table 14 and the pressure plate 13. Therefore, the user can operate intuitively. In addition, a simple configuration that does not use a lock mechanism or the like is advantageous for reducing the size and cost of the product.

  Further, a shaft 16 is provided on the document table 14 (the pressure plate 13 is pivotally supported with the shaft 16 provided on the document table 14 as a rotation center). As a result, the function of the scanner unit 3 can be completed within the scanner unit 3, and the positioning of the pressure plate 13 with respect to the document table 14 is facilitated. Therefore, it is possible to obtain an effect that it is easy to ensure reading accuracy (particularly reading accuracy from ADF in the case where the ADF is provided) (there is no fear of deteriorating). If the shaft 16 is coaxial with the shaft 21 that is the center of rotation of the document table 14, the shaft 16 may be provided on the shaft support portion 11 a of the frame 11 of the printer unit 2. The same effect as described above can be obtained.

  FIG. 5 shows the configuration of the image forming apparatus 101 according to the second embodiment, FIG. 5A is a side view showing the configuration when the document table 14 and the pressure plate 13 are closed, and FIG. 5B is the pressure plate. It is a side view which shows a structure when 13 is opened independently. FIG. 6 is a side view showing the configuration when the document table 14 and the pressure plate 13 are opened at different angles. Here, only the characteristic part is shown, and since other configurations and operations are the same as those of the first embodiment, the description thereof is omitted. In the second embodiment, the anti-rotation mechanism is a string-like member 50 that is a “connection member” that directly connects the pressure plate 13 and the printer unit 2.

  As shown in FIGS. 5A to 6, the shaft 21 (rotation center A) that is the rotation center of the document table 14 and the shaft 16 (rotation center B) that is the rotation center of the pressure plate 13 are on the same axis. The two rotation center axes are deviated.

  The printer unit 2 and the pressure plate 13 are connected by a string member 50. One end of the string-like member 50 is held by the frame string holding part 52 of the frame 11 of the printer unit 2, and the other end of the string-like member 50 is held by the pressure plate string holding part 53 provided at the lower part of the pressure plate 13. Yes. By being held in this way, rotation prevention when the pressure plate 13 is opened can be performed directly from the printer unit 2.

  With reference to FIG. 5B, a mechanism for rotating (opening and closing) the pressure plate 13 and a rotating operation (opening and closing operation) will be described. First, when opening the pressure plate 13, the tip of the pressure plate 13 is lifted. As a result, as shown in FIG. 5B, the pressure plate 13 rotates in the opening direction W around the rotation center B. When the pressure plate 13 rotates by a predetermined amount, the string-like member 50 connecting the printer unit 2 and the pressure plate 13 is stretched, and the pressure plate 13 cannot be rotated any more. The position of the pressure plate 13 at this time is the open position.

  Here, a force Fb is applied in a direction W for further opening the pressure plate 13 from a position where the pressure plate 13 shown in FIG. Since this force Fb is transmitted from the pressure plate string holding portion 53 of the pressure plate 13 to the frame string holding portion 52 of the printer unit 2 through the string-like member 50, the force applied to the pressure plate 13 is directly transmitted to the printer unit 2. Become. Therefore, the force Fb is not transmitted to the document table 14. Therefore, even when a force Fb is applied in the direction W for further opening the pressure plate 13 from a position where the pressure plate 13 is in the open state, a configuration that does not cause the user to be surprised by opening the document table 14 is achieved. When closing the pressure plate 13, the tip of the pressure plate 13 is pushed down.

  Next, a case where the document table 14 is opened and closed when the pressure plate 13 is held in the open state as shown in FIG. 5B will be described. Since the printer unit 2 and the pressure plate 13 are connected by a string-like member 50, the open position of the pressure plate 13 moves to the rear side of the product as shown in FIG. Never do. Therefore, the balance of the center of gravity of the image forming apparatus 101 is stable regardless of whether the pressure plate 13 or the document table 14 is opened or closed.

  According to the configuration of the first or second embodiment, the cost of parts is reduced, the product is miniaturized, the user can operate intuitively with a simple configuration without being surprised, and the balance of the center of gravity is stabilized. Detailed analysis of the effect is as follows.

  The printer unit 2 is provided with a rotation stopper when the pressure plate 13 is in the open position. Therefore, even if a further force in the opening direction is applied to the pressure plate 13 in the open state, the force is only transmitted to the printer unit 2 but not to the document table 14, and the document table 14 is opened. No worries that surprise the user. Further, since the pressure plate 13 is held in the open state directly from the printer unit 2, even when the document table 14 is opened and closed, the position of the pressure plate 13 in the open state is kept substantially constant. Therefore, the fluctuation of the center of gravity balance of the image forming apparatus 1 is greatly reduced, and there is no fear of losing the center of gravity balance.

  Furthermore, since no mechanism is added, an intuitive operation is possible. In addition, the structure is simple, which is advantageous for reducing the size and price of the product. In particular, the degree of the above-mentioned advantage increases when the light weight is aimed at a small / medium image forming apparatus.

  According to the configuration of the second embodiment, the same effect as that of the first embodiment can be obtained without adjusting the arrangement relationship between the abutting surface 17 and the back surface of the pressure plate 13 as in the first embodiment.

  In the first embodiment, the abutting surfaces 17 are provided only on the two inner sides of the four shaft support portions 11a. However, the configuration is not limited to this configuration. That is, you may provide in all the four axis | shaft support parts 11a. The number of abutting surfaces 17 can be changed as appropriate.

  In the second embodiment, the string-like member 50 is used for the connection between the printer unit 2 and the pressure plate 13. However, the present invention is not limited to this. For example, a link mechanism that performs a piston motion can be used. The same effect can be obtained. Further, the rotation center A and the rotation center B may be coaxial.

DESCRIPTION OF SYMBOLS 1,101 Image forming apparatus 2 Printer part (image forming part)
3 Scanner unit (image reading unit)
13 Pressure plate (pressing member)
14 Document table (document table)
17 Abutting surface (anti-rotation mechanism)
52 String member (rotation stop mechanism)
S Recording material

Claims (5)

An image forming unit that forms an image on a recording material, a document placing table that is disposed above the image forming unit, and on which the document is placed, and a pressing member that presses the document on the document placing table are readable. An image reading unit, wherein the image reading unit is rotatably provided with respect to the image forming unit, and the pressing member rotates in the same direction as the image reading unit with respect to the document placement table. An image forming apparatus provided movably,
An image forming apparatus, comprising: a rotation stop mechanism that is provided in the image forming unit and stops the rotation of the pressing member when the pressing member is in an open position.   The image forming apparatus according to claim 1, wherein the rotation center of the pressing member and the rotation center of the image reading unit are coaxial.   The image forming apparatus according to claim 2, wherein the pressing member is pivotally supported around a shaft provided on the document placing table.   The anti-rotation mechanism is formed on a support that extends from the image forming unit and supports the image reading unit, and has a contact surface against which the back surface of the pressing member abuts when the pressing member is in an open position. The image forming apparatus according to any one of claims 1 to 3.   The image forming apparatus according to claim 1, wherein the rotation stopping mechanism includes a connecting member that directly connects the pressing member and the image forming unit.

Images