JP5457125B2 - Sheet processing apparatus and image reading apparatus - Google Patents

Description

  The present invention relates to a sheet processing apparatus and an image reading apparatus, and more particularly to an image reading apparatus that reads an image formed on an original while conveying a sheet such as an original.

  As a conventional image reading apparatus which is an example of a sheet processing apparatus, an image reading unit in the apparatus is provided so as to be slidable in the main scanning direction of the image reading unit, and is configured to be detachable from the apparatus main body. Proposals have been made to improve workability during unit replacement (see, for example, Patent Document 1).

JP 2007-306146 A

  However, in the configuration disclosed in Patent Document 1 described above, the detachability of the image reading unit itself is improved, but there are the following problems.

  When the image reading unit is removed, the image reading unit is slid in the main scanning direction and pulled out, so that a space corresponding to the entire length of the image reading unit is required in the sliding direction. When maintenance work must be performed at the customer site, if there is not enough space to pull out the image reading unit, move the image reading device itself to a location where the work space is sufficiently wide, and then perform replacement work, There is a problem that workability is poor because there is no choice but to secure work space by moving objects.

  In addition, there is a problem in that the efficiency is poor because the exterior covers must be removed before replacing the image reading unit.

  Note that the above-described problem does not occur only in the above-described image reading apparatus. For example, the same problem may occur in a sheet processing apparatus that performs a predetermined process on a conveyed sheet.

  The present invention has been made to solve the above problems. An object of the present invention is to provide a mechanism that does not require a large work space, can easily remove a sheet processing unit, and can perform an efficient maintenance work.

The present invention provides an apparatus main body in which a first unit and a second unit are connected so as to be openable and closable, and a sheet extending downward from above the apparatus main body between the first unit and the second unit in a closed state. A conveyance path; and a processing unit that is provided in at least one of the first unit and the second unit and performs a predetermined process on the sheet in the sheet conveyance path, and the processing unit is in an open state. Of the first unit and the second unit are detachably provided from the opening side , and the center of gravity of either the first unit or the second unit in the open state is between the first unit and the second unit. The apparatus is located on the downstream side in the sheet conveying direction from the connecting portion, and the center of gravity of the apparatus body is located on the upstream side in the sheet conveying direction from the connecting portion .

  According to the present invention, a large work space is not required, the sheet processing unit can be easily removed, and an efficient maintenance operation can be performed.

1 is a schematic view showing a cross section of an image reading apparatus showing an embodiment of a sheet processing apparatus of the present invention. FIG. 2 is a cross-sectional view illustrating a state in which an upper unit 20 of the image reading apparatus illustrated in FIG. 1 is opened. FIG. 2 is a cross-sectional view illustrating a state in which an upper unit 20 of the image reading apparatus illustrated in FIG. 1 is opened. 2 is a schematic cross-sectional view showing a state in which the vicinity of a reading unit 7 and a lower reading unit 8 of the image reading apparatus of Embodiment 1 is viewed from the direction of arrow A in FIG. FIG. 3 is a schematic view showing a state in which the upper unit 20 is opened and the upper reading unit 7 and the lower reading unit 8 are removed from the upper frame 13 and the lower frame 14 as shown in FIG. FIG. 6 is a schematic cross-sectional view showing a state in which the vicinity of a reading unit 7 and a lower reading unit 8 of the image reading apparatus of Embodiment 2 is viewed from the direction of arrow A in FIG. 1. FIG. 7 is a schematic cross-sectional view showing a state in which the vicinity of a reading unit 7 and a lower reading unit 8 of the image reading apparatus of Example 3 is viewed from the surface of FIG. 1.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

  FIG. 1 is a schematic view showing a cross section of an image reading apparatus showing an embodiment of a sheet processing apparatus of the present invention.

  As shown in FIG. 1, the image reading apparatus includes an apparatus main body having a function of reading a sheet 1 such as a document, and a sheet feeding tray 2 on which sheets 1 fed to a sheet feeding port of a sheet material conveyance path are stacked. And a paper discharge tray 10 on which the sheets 1 discharged from the paper discharge port of the sheet conveyance path are stacked.

  In the sheet conveyance path, a feed roller 3, a retard roller 4 provided at a position facing the feed roller 3, a conveyance roller pair 6, and a paper discharge roller pair 9 are arranged.

  Between the conveyance roller pair 6 and the paper discharge roller pair 9, an upper reading unit 7 and a lower reading unit 8 each including a contact image sensor (CIS: contact image sensor) are disposed. The lower reading unit 8 reads an image on the front surface of the sheet 1 conveyed by the conveying roller pair 6, and the upper reading unit 7 reads an image on the back surface of the sheet 1 conveyed by the conveying roller pair 6.

  Hereinafter, the reading operation of the sheet 1 will be described.

  First, the user inserts the lower end of the sheet 1 from the sheet feeding port 5 of the apparatus main body until it hits the feed roller 3 and the retard roller 4.

  After the sheet 1 is inserted into the apparatus main body, when a reading operation start command is issued from a PC or the like connected to the image reading apparatus, the rollers in the apparatus start to rotate and the conveyance of the sheet 1 is started. .

  First, the feed roller 3 starts to rotate in the direction in which the sheet 1 is drawn. At the same time, the drive is transmitted to the retard roller 4, but the retard roller 4 tries to drive in the direction opposite to the direction in which the sheet 1 is pulled.

  The retard roller 4 is provided with a torque limiter. When a plurality of sheets 1 are inserted into the nip portion between the feed roller 3 and the retard roller 4, the second and subsequent sheets not in contact with the feed roller 3 are used. Although the sheet 1 is pushed back by the retard roller 4, when only one sheet 1 is present in the nip portion, the retard roller 4 starts to rotate with the feed roller 3 as the sheet 1 is conveyed. As a result, the sheets 1 are separated one by one and sent to the conveying roller pair 6.

  The sheet 1 sent to the conveyance roller pair 6 is conveyed to the upper reading unit 7 and the lower reading unit 8 at a constant speed. The upper reading unit 7 and the lower reading unit 8 respectively read the image information on the front and back of the conveyed sheet 1, and start transferring image data to the PC side via an interface (not shown).

  The sheet 1 that has passed through the upper reading unit 7 and the lower reading unit 8 is sent to the paper discharge roller pair 9. The pair of paper discharge rollers 9 discharges the sheet 1 onto the paper discharge tray 10, and a series of reading operations ends. By repeating this operation, the reading operation of a plurality of sheets 1 is performed.

  11 a is a flat cable connected to the upper reading unit 7, and 11 b is a flat cable connected to the lower reading unit 8. The flat cable 11a and the flat cable 11b are connected to a wiring board 12 made of a flexible printed wiring board or the like.

  The wiring board 12 includes a CPU, a ROM, a RAM, and the like. The CPU reads and executes a program stored in the ROM, thereby controlling the entire image forming apparatus.

  The image data of the sheet 1 read by the upper reading unit 7 and the lower reading unit 8 is transmitted to the wiring board 12 through the flat cables 11a and 11b.

  The wiring board 12 performs image processing or the like on the image data input via the flat cables 11a and 11b, and then transfers the image data to an externally connected PC or the like.

  The upper reading unit 7 is detachably disposed on an upper reading unit insertion portion 15 provided in the upper frame 13 and having a concave shape with a substantially U-shaped cross section in a direction orthogonal to the sheet conveying direction. Similarly, the lower reading unit 8 is detachably disposed on a lower reading unit insertion portion 16 having a concave shape with a substantially U-shaped cross section in a direction orthogonal to the sheet conveying direction, provided on the lower frame 14.

  The flat cable 11 a is arranged in an upper cable arrangement space 17 a provided between the back surface portion of the upper reading unit 7 and the bottom surface of the upper reading unit insertion portion 15 provided in the upper frame 13. Similarly, the flat cable 11 b is arranged in a lower cable arrangement space 17 b provided between the back surface portion of the lower reading unit 8 and the bottom surface of the lower reading unit insertion portion 16 provided in the lower frame 14.

  A hook-shaped portion 18 a engages the upper reading unit 7 with the upper frame 13. Similarly, 18 b is a hook-shaped portion that engages the lower reading unit 8 with the lower frame 14. The hook-shaped portions 18a and 18b are configured to be able to release the engagement (lock) from the conveyance path side.

  Note that the main body of the image reading apparatus is constituted by connecting the end portions of the first unit and the second unit so that they can be opened and closed so that a paper jam generated in the conveyance path can be removed. For example, in this embodiment, it is divided into an upper unit 20 constituting the first unit and a lower unit 21 constituting the second unit. As shown in FIG. 2A and FIG. It is engaged and connected so as to be rotatable (openable and closable). The upper unit 20 is mounted on the lower unit 21 so as to form a sheet conveyance path extending from the upper side of the apparatus main body (for example, the upper rear part) toward the lower side (for example, the lower front part) of the apparatus main body. In this embodiment, the first unit is the upper unit 20 and the second unit is the lower unit 21, but it is of course possible to reverse this so that the first unit is the lower unit and the second unit is the upper unit.

  1 shows a configuration in which the upper reading unit 7 is arranged in the upper unit 20 and the lower reading unit 8 is arranged in the lower unit 21, but the reading unit is arranged in only one of the upper unit 20 and the lower unit 21. It may be configured. In the case of this configuration, it is assumed that only one of the upper unit 20 and the lower unit 21 is provided with a concave reading unit insertion portion or a hook-shaped portion.

  2A and 2B are sectional views showing a state in which the upper unit 20 of the image reading apparatus shown in FIG. 1 is opened.

  FIG. 3 is a schematic cross-sectional view illustrating a state in which the vicinity of the reading unit 7 and the lower reading unit 8 of the image reading apparatus according to the first embodiment is viewed from the direction of arrow A in FIG.

  As shown in FIG. 3, the flat cable 11a is arranged in the upper cable arrangement space 17a so as to be substantially parallel to the main scanning direction of the upper reading unit 7.

  Similarly, the flat cable 11b is arranged in the lower cable arrangement space 17b so as to be substantially parallel to the main scanning direction of the lower reading unit 8.

  Reference numeral 19 a denotes a connector portion that connects the upper reading unit 7 and the flat cable 11 a, and is provided on the back surface of the upper reading unit 7. Similarly, 19b is a connector part which connects the lower reading unit 8 and the flat cable 11b, and is provided on the back surface of the lower reading unit 8.

  FIG. 4 is a schematic view showing a state in which the upper unit 20 is opened and the upper reading unit 7 and the lower reading unit 8 are removed from the upper frame 13 and the lower frame 14 as shown in FIGS. 2A and 2B.

  As shown in FIG. 4, the upper reading unit 7 spreads the hook-shaped portion 18 a provided on the upper frame 13 in the direction of the arrow B, and releases the lock. It can be easily removed from the frame 13 in the direction of arrow C.

  Similarly, the lower reading unit 8 also spreads the hook-shaped portion 18b provided on the lower frame 14 in the direction of the arrow B and releases the lock, as shown in FIGS. 2A, 2B, and 4. It can be easily removed from the frame 14 in the direction of arrow D.

  Further, the flat cable 11a is wound around the upper cable arrangement space 17a, so that a certain amount of margin can be provided in the length. Similarly, the flat cable 11b is also wound around the lower cable arrangement space 17b, so that a certain amount of margin can be provided. For this reason, even if the upper reading unit 7 and the lower reading unit 8 are accidentally removed from the apparatus, there is no fear that the flat cable 11a will be damaged without applying an excessive load.

  Further, the upper reading unit 7 can be separated from the upper reading unit insertion portion 15 by a certain distance while the flat cable 11 a is connected to the upper reading unit 7. Similarly, the lower reading unit 8 can be separated from the lower reading unit 8 by a certain distance while the flat cable 11 b is connected to the lower reading unit 8. For this reason, it is easy to put a hand on the back surface of the upper reading unit 7 or the lower reading unit 8, and the attaching / detaching work of the flat cable 11a and the flat cable 11b is easy.

  Further, as the engaging means of the upper reading unit 7 and the lower reading unit 8, hook-shaped portions 18a and 18b are provided on the side surfaces of the concave-shaped portions 15 and 16 on the substantially U-shaped cross sections of the upper unit 20 and the lower unit 21, respectively. Since the upper reading unit 7 and the lower reading unit 8 are held by the upper unit 20 and the lower unit 21 by engaging the shape portions 18a and 18b with the upper reading unit 7 and the lower reading unit 8, the image reading unit of the image reading unit is configured. The engaging means can be realized with a simple configuration, and is effective in terms of cost and reliability.

  Further, the upper reading unit 7 and the lower reading unit 8 have connector parts 19a and 19b that can be freely attached to and detached from the information signal lines 11a and 11b, so that the concave shaped parts 15 and 16 of the upper and lower unit are provided. Since the information signal lines 11a and 11b can be attached and detached on the outside, there is an effect that the maintenance workability is good.

  Further, since the information signal lines 11a and 11b are configured by flat cables, the cables can be arranged even when the information signal line arrangement space cannot be made large on the back surface of the image reading unit.

  In the configuration of the present embodiment, as in Patent Document 1 shown in the background art section, there is no need for wasteful work such as removing the exterior covers by replacing the image reading unit, and a wide maintenance space is provided. Therefore, efficient maintenance work can be performed.

  Hereinafter, the opening angle of the upper unit 20 will be described with reference to FIGS. 2A and 2B.

  The upper unit 20 can be opened to a predetermined angle on the sheet discharge tray 10 side at the fulcrum of the hinge 30. In the present embodiment, as shown in FIG. 2A, a touch panel type operation panel 99 is provided on the front surface of the upper unit 20. Such an upper unit 20 is in an open state with respect to the lower unit 21, and the center of gravity of the upper unit 20 is from the fulcrum of the hinge 30 (connection portion between the upper unit 20 and the lower unit 21) to the discharge tray 10 side (in the sheet conveyance direction). (The upper unit 20 is inclined to the sheet discharge tray 10 side from the fulcrum of the hinge 30), and the center of gravity of the entire image reading apparatus is from the fulcrum of the hinge 30 to the sheet feed tray 2 side (upstream side in the sheet conveyance direction). ). With this configuration, FIG. 2A shows an example in which the angle on the opening side at the connection portion between the upper unit 20 and the lower unit 21 is substantially a right angle when the upper unit 20 is in the open state.

  2B shows an example in which a touch panel type operation panel is not provided, but in such a configuration, the weight of the upper unit 20 is smaller than that of the upper unit in FIG. 2A. For this reason, even if the opening angle of the upper unit 20 with respect to the lower unit 21 is an obtuse angle, that is, 90 degrees or more, the center of gravity of the entire apparatus is on the paper feed tray 2 side in the open state of the upper unit 20. The upper unit 20 can be opened larger without the whole being overturned.

  By configuring the opening angle of the upper unit 20 in this way, the upper unit 20 is opened to a state where the upper unit 20 is inclined to the discharge tray 10 side, and, for example, the sheet jam removal operation, the upper reading unit 7 and the lower reading are performed. The unit 8 can be easily cleaned and removed. Even if the upper unit 20 is opened largely to the paper discharge tray 10 side, the center of gravity of the entire image reading apparatus is on the paper feed tray 2 side from the fulcrum of the hinge 30, so the image reading apparatus falls over to the paper discharge tray 10 side. Can effectively prevent such troubles.

  In particular, the image reading apparatus as in the present embodiment is configured to convey the sheets toward the reading units 7 and 8 while separating the sheets one by one from the paper feed tray. For this reason, on the upstream side of each reading unit 7, 8, for example, a sheet detection sensor for detecting the presence or absence of a sheet in the vicinity of the sheet insertion opening, a separation feeding mechanism, or arrival and passage of a sheet to be separated and fed. A number of registration sensors and the like are arranged for detecting and timing the start of reading in each of the reading units 7 and 8. Therefore, in order to reduce the size of the apparatus and save installation space, each reading unit 7, 8 is disposed on the downstream side of the conveyance path, that is, in the vicinity of the connection portion between the upper unit 20 and the lower unit 21. Will be placed on the side. Even if the reading units 7 and 8 are arranged in a relatively narrow portion (corner portion) inside the apparatus in the open state of the upper unit 20 and the lower unit 21 as in this embodiment, the upper unit Since the 20 and the lower unit 21 are configured to be greatly expanded, the reading units 7 and 8 can be easily attached and detached from the inside of the apparatus during maintenance.

  FIG. 5 is a schematic cross-sectional view showing the vicinity of the reading unit 7 and the lower reading unit 8 of the image reading apparatus according to the second embodiment when viewed from the direction of the arrow A in FIG. The code | symbol is attached | subjected.

  As shown in FIG. 5, in the second embodiment, the flat cable 11a is arranged in the main scanning direction of the upper reading unit 7 in the upper cable arrangement space 17a, and one folded portion is provided. Similarly, in the lower cable arrangement space 17b, the flat cable 11b is arranged in the main scanning direction of the lower reading unit 8, and one folded portion is provided.

  The outline is the same as that of the first embodiment shown in FIG. 3, but a flat cable between the wiring board 12 and the upper reading unit 7 and the lower reading unit 8 is provided by providing a folded portion at one place of the flat cables 11a and 11b. A further margin can be provided for the lengths of 11a and 11b. For this reason, handling at the time of replacement of the upper reading unit 7 and the lower reading unit 8 becomes easy, and workability is further improved. In the example illustrated in FIG. 5, the folded portions of the flat cables 11 a and 11 b are one place, but a plurality of folded portions may be provided.

  FIG. 6 is a schematic cross-sectional view showing the vicinity of the reading unit 7 and the lower reading unit 8 of the image reading apparatus according to the third embodiment as viewed from the surface of FIG. 1, and the same components as those in FIG. It is attached.

  As shown in FIG. 6, the second embodiment has a configuration in which the flat cable 11a is arranged in the upper cable arrangement space 17a in the sub-scanning direction of the upper reading unit 7 and one folded portion is provided. 22a is a hole-shaped part in which the flat cable 11a is formed on the side surface of the upper reading unit fitting part 15, and stores the folded part of the flat cable 11a.

  Similarly, the flat cable 11b is arranged in the sub-scanning direction of the lower reading unit 8 in the lower cable arrangement space 17b, and one folded portion is provided. 22b is a hole-shaped part which formed the flat cable 11b in the side surface of the lower reading unit insertion part 16, and stores the folding | turning part of the flat cable 11b.

  The hole-shaped portion 22a may be formed on the bottom surface of the upper reading unit insertion portion 15, or the hole-shaped portion 22b may be formed on the bottom surface of the lower reading unit insertion portion 16.

  As shown in FIG. 6, when the upper cable arrangement space 17a and the lower cable arrangement space 17b cannot be made large in the main scanning direction of the upper reading unit 7 and the lower reading unit 8 due to the arrangement of other components, etc. 11a and 11b are arranged in the hole-shaped portions 22a and 22b formed on the side surfaces of the upper reading unit insertion portion 15 and the lower reading unit insertion portion 16, respectively, so that the length of the flat cables 11a and 11b has a margin. Therefore, it is possible to obtain the same effect as the above-described embodiment.

  In the example shown in FIG. 6, the folded portions of the flat cables 11 a and 11 b are one place, but a plurality of folded parts may be provided.

  Further, as shown in the drawings shown so far, the connector portions 19a and 19b for connecting the upper reading unit 7 and the lower reading unit 8 to the flat cables 11a and 11b are connected to the rear surfaces of the upper reading unit 7 and the lower reading unit 8. Since the flat cables 11a and 11b can be attached and detached outside the upper reading unit insertion portion 15 and the lower reading unit insertion portion 16, the workability is good.

  In the present embodiment, an example in which a flat cable is used for the information signal line connecting the upper reading unit 7, the lower reading unit 8 and the wiring board 12 is described. However, the upper cable arrangement space 17a, the lower cable arrangement is used. Even if the space 17b cannot be made large, it is effective because a flat cable can be arranged.

  The information signal line connecting the upper reading unit 7 and the lower reading unit 8 and the wiring board 12 may not be a flat cable but may be another cable.

  Further, connectors connected to the wiring board 12 are provided on the bottom surface of the upper reading unit insertion portion 15 and the bottom surface of the lower reading unit insertion portion 16, respectively, and these connectors and the connector provided on the back surface of the upper reading unit 7. The configuration may be such that the portion 19a and the connector portion 19b provided on the back surface of the lower reading unit 8 are directly connected to each other.

  Further, wireless communication means (for example, infrared communication means) connected to the wiring board 12 is provided on the bottom surface of the upper reading unit insertion portion 15 and the bottom surface of the lower reading unit insertion portion 16, respectively. In addition, wireless communication means (for example, infrared communication means) is provided on the back surface of the lower reading unit 8, and the upper reading unit 7, the lower reading unit 8 and the wiring board 12 can communicate with each other via these wireless communication means. It may be.

  By adopting the configuration as described above, it is not necessary to perform a wasteful operation such as removing the outer covers by exchanging the upper reading unit 7 and the lower reading unit 8, and image reading that does not require a wide maintenance space. Equipment can be provided. Further, since the image reading unit can be easily attached and detached simply by opening the upper unit, it is possible to provide an image reading apparatus capable of maintenance with high work efficiency.

  As described above, in the sheet feed type image reading apparatus, the detachability of the image reading unit can be improved.

  In each of the above embodiments, an image reading apparatus (scanner) is shown as an example of the sheet processing apparatus of the present invention. However, the present invention may be applied to a sheet processing apparatus other than the image reading apparatus (scanner). Any apparatus may be used as long as it is a sheet processing apparatus including a processing unit that performs a predetermined process on a sheet in the sheet conveyance path. For example, the sheet processing apparatus of the present invention may be a printer including an image forming unit that performs an image forming process on a sheet in a sheet conveyance path.

  Although one embodiment has been described above, the present invention can take an embodiment as a system, apparatus, method, or the like. Specifically, the present invention may be applied to a system composed of a plurality of devices, or may be applied to an apparatus composed of a single device.

  The present invention is not limited to the above embodiments, and various modifications (including organic combinations of the embodiments) are possible based on the spirit of the present invention, and these are excluded from the scope of the present invention. is not.

  While various examples and embodiments of the present invention have been shown and described, those skilled in the art will not limit the spirit and scope of the present invention to the specific description in the present specification.

  In addition, all the structures which combined each Example mentioned above and its modification are also included in this invention.

DESCRIPTION OF SYMBOLS 1 Sheet | seat 2 Paper feed tray 3 Feed roller 4 Retard roller 5 Paper feed port 6 Feed roller 7 Upper reading unit 8 Lower reading unit 9 Paper discharge roller 10 Paper discharge tray 11a, 11b Flat cable 12 Wiring board 13 Upper frame 14 Lower frame 15 Upper reading unit insertion portion 16 Lower reading unit insertion portion 17a, 17b Cable arrangement space 18a, 18b Hook shape portion 19a, 19b Connector portion 20 Upper unit 21 Lower unit 22a, 11b Hole shape portion

Claims (13)

An apparatus main body in which the first unit and the second unit are connected to be freely opened and closed;
A sheet conveying path extending from the upper side of the apparatus main body to the lower side between the first unit and the second unit in the closed state;
A processing unit that is provided in at least one of the first unit and the second unit and performs a predetermined process on the sheet in the sheet conveyance path;
The processing unit is detachably provided from the opening side of the first unit and the second unit in an open state ,
The center of gravity of one of the first unit and the second unit in the open state is located on the downstream side in the sheet conveying direction from the connecting portion between the first unit and the second unit, and the center of gravity of the apparatus main body is A sheet processing apparatus, wherein the sheet processing apparatus is located upstream of the connecting portion in a sheet conveying direction . The sheet processing apparatus according to claim 1, wherein the angle of the opening side, characterized in that it is an obtuse angle at the connection portion between the first unit in the open state and the second unit. Wherein at least one of the first unit or the second unit has the cross-sectional face shape of the concave portion in the direction perpendicular to the sheet conveying direction,
The processing unit, the sheet processing apparatus according to claim 1 or 2, characterized in that disposed in the concave portion. A signal line connected to the processing unit;
The sheet processing apparatus according to claim 3 , wherein the signal line is disposed on a side surface of the concave shape portion or a hole shape portion formed on a bottom surface of the concave shape portion. A signal line connected to the processing unit;
The signal line, the sheet processing apparatus according to any one of claims 1 to 3, characterized in that it is arranged on the rear portion of the processing unit. The signal line, the sheet processing apparatus according to claim 5, characterized in that it is arranged such that the direction and the flat row perpendicular to the sheet conveyance direction on the rear portion of the processing unit. The signal line, the sheet processing apparatus according to claim 5, characterized in that it is arranged such that the sheet conveyance direction and flat row on the rear portion of the processing unit. The signal line, the sheet processing apparatus according to claim 6 or 7, wherein a folded portion of the at least one location. The engagement unit is provided in at least one of the first unit and the second unit that engages the processing unit and can be disengaged from the sheet conveyance path side. The sheet processing apparatus according to any one of 1 to 8 . Wherein at least one of the first unit or the second unit has the cross-sectional face shape of the concave portion in the direction perpendicular to the sheet conveying direction,
The said engaging means has a hook-shaped part in the side surface of the said concave-shaped part, The said processing unit is hold | maintained by engagement with the said hook-shaped part and the said processing unit. Sheet processing device. The processing unit, the sheet processing apparatus according to any one of claims 4 to 10, characterized in that it has a freely connector portion detachably to the signal line. The signal line, the sheet processing apparatus according to any one of claims 4 to 11, characterized in that it is constituted by a flat cable. An apparatus main body in which the first unit and the second unit are connected to be freely opened and closed;
A sheet conveying path extending from the upper side of the apparatus main body to the lower side between the first unit and the second unit in the closed state;
An image reading unit that is provided in at least one of the first unit and the second unit and reads an image of a sheet in the sheet conveyance path;
The image reading unit is detachably provided from the opening side of the first unit and the second unit in an open state ,
The center of gravity of one of the first unit and the second unit in the open state is located on the downstream side in the sheet conveying direction from the connecting portion between the first unit and the second unit, and the center of gravity of the apparatus main body is An image reading apparatus, wherein the image reading apparatus is located upstream of the connecting portion in the sheet conveying direction .

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