JP2021073785A - Printing system - Google Patents

Abstract

To accurately align a heavy-weight opening and closing body with an original platen when attaching such an opening and closing body to the original platen.SOLUTION: There are provided: a scanner unit 300, an ADF 200, a hinge 110 that connects the ADF 200 to the scanner unit 300 so as to be openable and closable around a rotating shaft 115, and a positioning mechanism. The hinge 110 includes an energizing member 117 that maintains the ADF 200 at an opened state, and is disposed at a back surface side of the scanner unit 300 so that the rotating shaft 115 is positioned on an upper side with respect to the energizing member 117. The positioning mechanism includes: a convex portion 121 formed on a surface 111a that is located below the rotating shaft 115 and intersects in an axial direction of the rotating shaft 115; a slit 320 formed in the scanner unit 300 and engages with the convex portion 121; and an adjustment screw 307a that presses on an under part of the hinge 110 from the back surface side of the scanner unit 300.SELECTED DRAWING: Figure 7

Description

The present invention relates to a document reading device typified by a scanner or the like.

A document reading device typified by a scanner or the like is provided with an opening / closing body that opens / closes the platen and holds the document in the closed state. The opening / closing body may be a mere cover or an automatic document transfer device (hereinafter, referred to as an ADF (Auto Document Feeder)). Further, a document reading device connected by a hinge mechanism (hereinafter abbreviated as a hinge) so that the opening / closing body can be rotated with respect to the document table and can be held at a predetermined rotation angle (opening angle). Has been proposed (for example, Patent Document 1).
In the document reading device described in Patent Document 1, the opening / closing body has a mechanism for transporting documents (for example, a motor, a cam, a belt, a shaft, etc.), and the opening / closing body has a heavier weight than a case where the opening / closing body is a simple cover. Have. The hinge rotatably supports a heavy weight closure.

Japanese Unexamined Patent Publication No. 2016-173470

However, the document reading device described in Patent Document 1 does not disclose a configuration in which the opening / closing body is accurately aligned with the platen. Further, when a heavy-weight opening / closing body is attached to the platen by using a hinge, there is a problem that it is difficult to accurately align the heavy-weight opening / closing body with the platen.

The present invention has been made to solve at least a part of the above-mentioned problems, and can be realized as the following forms or application examples.

[Application Example 1] The document reading device according to this application example is arranged so as to be overlapped with a document reading unit having a mounting table for reading a mounted document and an upper surface of the document reading unit, and is opened with respect to the table described above. A cover unit that can be displaced into a state and a closed state, a hinge that connects the cover unit to the document reading unit so that the cover unit can be opened and closed by rotating around a rotation axis, and the document reading unit and the hinge. The hinge includes an urging member that keeps the cover portion in an open state, and the urging direction of the urging member is the document reading unit. And the cover portion are overlapped with each other, and the rotation shaft is arranged on the back side of the document reading portion so as to be on the upper side with respect to the urging member, and the positioning mechanism is located on the back surface side of the rotation shaft. An engaging portion located below and formed on a surface of the hinge that intersects the axial direction of the rotating shaft, and an engaged portion formed on the document reading portion and engaged with the engaging portion. It is characterized by having a pressing portion which is lower than the position of the engaging portion and the engaged portion and presses the lower part of the hinge from the back surface side of the document reading portion.

The positioning mechanism has an engagement portion that engages with the engaging portion and a pressing portion that presses the lower part of the hinge from the back side of the document reading portion. The hinge can be aligned accurately. For example, when assembling the cover part to the document reading part, first attach the cover part to the hinge, then attach the hinge to which the cover part is attached to the document reading part, and then attach the cover part to the hinge. By adjusting the positions of the document reading unit and the hinge in the front-rear direction of the device by the positioning mechanism, the cover unit can be accurately assembled to the document reading unit.
Therefore, even if the cover portion has a mechanism for transporting the document and the cover portion is heavier than the case where the cover portion is a simple cover, the cover portion having a heavier weight than the document reading portion is provided. It can be aligned accurately.

[Application Example 2] In the document reading device described in the above application example, it is preferable that the engaging portion is formed in a case accommodating the urging member, and the pressing portion presses the case.

Since the force against the weight of the cover portion is urged from the hinge to the cover portion by the urging member, for example, the cover portion can maintain the open posture and the closed posture. Further, when the pressing portion presses the case, the positions of the document reading portion and the hinge to which the cover portion is attached can be adjusted in the front-rear direction of the device while the open posture and the closed posture are maintained. ..

[Application Example 3] In the document reading device described in the application example, it is preferable that a plurality of the hinges are arranged and the positioning mechanism is used for positioning the document reading unit and the respective hinges in the front-rear direction of the device. ..

When a plurality of hinges are arranged and the position of the document reading unit and each hinge in the front-rear direction of the device is adjusted by the positioning mechanism, the mounting table (document reading unit) is compared with the case where a single hinge is arranged. In addition to connecting the cover portions more stably so that they can be opened and closed, it is possible to improve the accuracy of the position of the cover portion with respect to the document reading portion in the front-rear direction of the device.

[Application Example 4] In the document reading device according to the above application example, the above-described stand has a first recess in which the document is placed, and the cover portion is inside the first recess in the closed state. It is preferable to have a document cover portion arranged in contact with each other.

When a document cover portion is provided inscribed in the first recess in the closed state and the document placed in the first recess is pressed by the mounting table and the document cover portion, the posture of the document is corrected to the correct state. , The original can be read correctly.

[Application Example 5] In the document reading device according to the above application example, the document reading unit has a reading window for reading the conveyed document, and the cover unit transfers the document to the scanning window. It is preferable to have a portion.

When the document reading unit has a reading window for reading the document and the cover unit has the document transporting unit for transporting the document to the scanning window, the document can be read by transporting the document to the scanning window.

[Application Example 6] The document reading device according to the above application example has a second concave portion formed at least on the free end side of the document reading portion of the cover portion and a convex portion arranged on the document reading portion. Then, it is preferable to fix the positioning mechanism in a state where the second concave portion and the convex portion are engaged with each other and the document reading portion and the cover portion are aligned.

The state in which the second concave portion of the cover portion and the convex portion of the document reading portion are engaged is a state in which the cover portion and the document reading portion are properly aligned. When the second concave portion of the cover portion and the convex portion of the document reading portion are engaged with each other and the positioning mechanism is fixed with the cover portion and the document reading portion fixed to each other, the cover portion and the document reading portion are properly positioned. The cover unit and the document reading unit can be fixed in the combined state.

[Application Example 7] In the document reading device according to the application example, the convex portion is detachable from a third concave portion formed in the document reading portion, and in the mounted state, the convex portion and the cover portion are attached to and detached from each other. It is preferable that the document reading portion and the cover portion are aligned with each other in a state where the second recess is fitted.

If the convex portion is removable to the third concave portion, when the convex portion is not required for the document reading portion, the unnecessary convex portion is not formed on the document reading portion unless the convex portion is attached to the third concave portion of the document reading portion. .. When a convex portion is required for the original reading portion in order to properly align the cover portion and the original reading portion, the convex portion is attached to the third concave portion of the original reading portion to form the convex portion on the original reading portion. By engaging the convex portion of the document reading portion with the second concave portion of the cover portion, the document reading portion and the cover portion can be properly aligned.

[Application Example 8] In the document reading device described in the application example, the document reading unit can be opened with respect to the lower structure of the document reading unit with the lower part of the rotation axis of the hinge as the rotation axis. The second recess is formed by a through-hole, and the third recess to which the convex portion is attached / detached provides a second through-hole that communicates with the inside of the document reading portion by removing the convex portion. It is preferable that the cover portion and the document reading portion can be fastened to each other through the through-hole and the second through-hole.

When the second recess of the cover portion is used as a through-hole and the second through-hole is provided in the third recess of the document reading portion, the cover portion and the document reading portion are fastened by using the through-hole and the second through-hole. It is possible to prevent the cover unit from being inadvertently opened with respect to the document reading unit.

The perspective view of the printing system which has the document reading apparatus which concerns on this embodiment. The perspective view of the printing system which has the document reading apparatus which concerns on this embodiment. The perspective view of the printing system which has the document reading apparatus which concerns on this embodiment. The perspective view of the printing system which has the document reading apparatus which concerns on this embodiment. The perspective view of the document reading apparatus which concerns on this embodiment. An enlarged view of the area A surrounded by the broken line in FIG. An enlarged view of the area B surrounded by the broken line in FIG. Perspective view of the fixing member. Perspective view of the hinge. The schematic plan view which shows the state which the convex part and the slit are engaged with. The schematic diagram which shows the state of the recess provided in the exterior member of a scanner part. The schematic diagram which shows the state of the recess provided in the exterior member of a scanner part. A perspective view showing a state in which pins and screws are stored. Enlarged view of the part where the pin is stored. FIG. 6 is a schematic cross-sectional view of the ADF between DD in FIG. FIG. 5 is a schematic cross-sectional view of the region E surrounded by the alternate long and short dash line in FIG. FIG. 5 is a schematic cross-sectional view of the region F surrounded by the alternate long and short dash line in FIG. FIG. 5 is a schematic cross-sectional view of the region G surrounded by the alternate long and short dash line in FIG. Schematic cross-sectional view of a document reader according to a modified example. The perspective view which shows the state of the front side cover. FIG. 6 is a schematic cross-sectional view showing a fixed state between the front cover and the main body of the ADF. An exploded perspective view of the exterior member of the scanner unit. An exploded perspective view of a sheet metal member. Perspective view of the exterior member. The schematic diagram which shows the state of the 1st fixed part. The schematic diagram which shows the state of the 4th fixed part. The schematic diagram which shows the state of the 5th fixed part.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Such an embodiment shows one aspect of the present invention, does not limit the present invention, and can be arbitrarily changed within the scope of the technical idea of the present invention. Further, in each of the following figures, the scale of each layer and each part is different from the actual scale in order to make each layer and each part recognizable in the drawing.

(Embodiment)
1 to 4 are perspective views of a printing system having a document reading device according to the embodiment. FIG. 5 is a perspective view of the document reading device according to the present embodiment, and is shown so that the internal state of the document reading device 100 can be understood. FIG. 6 is an enlarged view of the area A surrounded by the broken line in FIG. FIG. 7 is an enlarged view of the area B surrounded by the broken line in FIG. FIG. 8 is a perspective view of the fixing member. FIG. 9 is a perspective view of the hinge.
Specifically, FIG. 2 is a perspective view of the printing system 1 in a state where the document reading device 100 is opened with respect to the printing device 10. FIG. 3 is a perspective view of the printing system 1 in a state where the ADF 200 is opened with respect to the scanner unit 300. 4 and 5 are perspective views of the printing system 1 when the printing system 1 is viewed from the opposite side of the case of FIG. Further, FIG. 5 is a perspective view of the printing system 1 without the back side covers 21, 202, and 302.
1 and 2 are perspective views in a state where the ADF 200 is closed with respect to the scanner unit 300. FIG. 3 is a perspective view of the ADF 200 opened with respect to the scanner unit 300.

1 to 7 show an X-axis, a Y-axis, and a Z-axis as three spatial axes orthogonal to each other. Of the X-axis directions along the X-axis, the + X-axis direction is a positive direction, and the −X-axis direction is a negative direction. Of the Y-axis directions along the Y-axis, the + Y-axis direction is a positive direction, and the −Y-axis direction is a negative direction. Of the Z-axis directions along the Z-axis, the + Z-axis direction is a positive direction, and the −Z-axis direction is a negative direction. That is, the arrow side of the arrow indicating the axial direction is the + direction (positive direction), and the base end side is the-direction (negative direction). The XY plane is a horizontal plane, and the −Z axis direction is the direction of gravity. Further, the XYZ axes of FIGS. 1 to 7 correspond to the XYZ axes of other figures.
The Y-axis direction is an example of the "device front-rear direction". Further, the + Z-axis direction side is an example of "upper", and may be hereinafter referred to as an upper side. The −Z axis direction side is an example of “downward”, and may be hereinafter referred to as downward or downward side. Further, the −Y axis direction side is an example of the “back surface side”.

As shown in FIG. 1, the printing system 1 is a multifunction device having a printing function in addition to an image reading function, and is arranged on the + Z axis direction side and the −Z axis direction side with the document reading device 100. It has a printing device 10. That is, the printing system 1 has a configuration in which the printing device 10 and the document reading device 100 are stacked in this order.
The printing device 10 is an example of the "substructure of the document reading unit".

The printing device 10 is an inkjet printer that records images such as characters and photographs by ejecting ink onto paper, and has a housing 11 that forms the exterior of the printing device 10 and an upper portion (+ Z-axis direction side) of the housing 11. ), And a paper cassette 13 provided from the central portion to the lower portion (−Z axis direction side) of the printing apparatus 10. Four paper cassettes 13 are arranged side by side in the −Z axis direction, and paper is stored in each of the paper cassettes 13 in a laminated state. Further, on the upper side (+ Z-axis direction side) of the paper cassette 13 and on the right side (-X-axis direction side) of the operation unit 12, the discharge unit 14 on which the paper on which images such as characters and photographs are recorded is discharged. Is provided. That is, spaces for providing the discharge portion 14 are provided in the upper and right corner portions of the printing apparatus 10. Therefore, the lower and right corners of the document reading device 100 are in a state of being floated from the printing device 10 by the space for providing the discharging unit 14.

In the following description, the side where the operation unit 12 is provided (+ Y-axis direction side) is referred to as a front surface, the side opposite to the front surface (-Y-axis direction side) is referred to as a back surface, and the front surface and the side intersecting the back surface. (+ X-axis direction side, -X-axis direction side) may be referred to as a side surface.
The document scanning device 100 includes a paper feed tray 101 in which a document is set, an ADF (Auto Document Feeder) 200 that transports a document from the paper feed tray 101 along a predetermined transport path, and an image of a document transported from the ADF. It has a scanner unit 300 for reading the image, and an ejection tray 102 for ejecting a document from which an image has been read. The ADF 200 is arranged so as to be overlapped on the upper surface of the scanner unit 300, and has a document transfer unit 205 for transporting the document inside. A removable front side cover 201 is provided on the front surface of the ADF 200. A side cover 231 that can be opened and closed is provided on the side surface side of the ADF 200 in the + X axis direction.
The ADF200 is an example of a "cover portion". The scanner unit 300 is an example of a “document reading unit”.

As shown in FIG. 2, on the back side of the printing system 1, a connecting member 31 that connects the printing device 10 and the document reading device 100 (scanner unit 300) so as to be openable and closable is provided, and the document reading device 100 is connected to the printing device 100. It can be opened and closed with respect to 10. With the document reading device 100 open to the printing device 10, the recording head (not shown) for ejecting ink onto the paper is replaced.
Specifically, the printing apparatus 10 has a recording head inside which ejects ink onto paper. When the recording head is used, the ink flow path of the recording head is clogged, so it is necessary to periodically perform maintenance processing such as flushing and wiping to restore the recording head to a normal state. However, if the recording head is used for a long period of time, it becomes difficult to restore the recording head to a normal state by maintenance processing, and it is necessary to replace the recording head. The replacement of the recording head is performed with the document reading device 100 open to the printing device 10.

As shown in FIG. 3, a plurality of hinges 110 for connecting the ADF 200 to the scanner unit 300 so as to be openable and closable are arranged on the back side of the document reading device 100. Specifically, the scanner unit 300 has a mounting table 373 on which a document is placed, and a plurality of hinges 110 for connecting the ADF 200 to the mounting table 373 so as to be openable and closable are arranged. The number of hinges 110 is two, and the two hinges 110 are arranged along the X-axis direction. As a result, the ADF 200 rotates about the rotation shaft 115 (see FIG. 9) of the hinge 110 and can be opened and closed with respect to the mounting table 373. That is, the hinge 110 connects the scanner unit 300 and the ADF 200 to the scanner unit 300 so that the ADF 200 rotates about the rotation shaft 115 and can be opened and closed.
In other words, by providing the hinge 110, the ADF 200 is arranged so as to be overlapped on the upper surface of the scanner unit 300, and is open (open state) with respect to the mounting table 373 or closed with respect to the mounting table 373. It can be displaced to (closed state).
In the following description, the state in which the ADF 200 is opened with respect to the mounting table 373 is referred to as an open state, and the state in which the ADF 200 is closed with respect to the mounting table 373 is referred to as a closed state.

The scanner unit 300 is provided with a mounting table 373 on which a document is placed on the + Z axis direction side. In other words, the scanner unit 300 has a mounting table 373 that reads the mounted document. The mounting table 373 has an exterior member 380 made of resin and a document table glass 374, 375. Further, an image reading unit (not shown) is arranged below the platen glass 374 and 375.
The exterior member 380 has an opening 371 long in the Y-axis direction and an opening 372 long in the X-axis direction arranged on the −X-axis direction side with respect to the opening 371. The platen glass 374 is arranged inside the exterior member 380 so as to cover the opening 371. The platen glass 375 is arranged inside the exterior member 380 so as to cover the opening 372.

When reading an image of a document conveyed by the ADF 200, the image reading unit is stopped below the platen glass 374. Then, the image reading unit reads the image of the document conveyed from the ADF 200 via the platen glass 374 in the closed state.
When reading the image of the original document conveyed by the ADF 200, a reading window for reading the image of the original document is formed by the platen base glass 374 and the opening 371 of the exterior member 380. In other words, the scanner unit 300 has a reading window for reading an image of a document conveyed from the ADF 200 by the platen glass 374 and the opening 371. The ADF200 has a document transfer unit 205 (see FIG. 1) that transfers a document to a reading window formed by a platen glass 374 and an opening 371. With such a configuration, the document reading device 100 can read the image of the document transported from the document transport unit 205 in the closed state via the platen glass 374.

When scanning the image of the original without using the ADF200, the original is placed inside the opening 372 in the open state, and then the image reading unit is moved in the −X axis direction in the closed state. Read the image.
Specifically, the document is placed so that the edge of the document is in contact with the edge of the opening 372, and the position of the document is determined (controlled) by the opening 372 of the exterior member 380. A document mat 203 is provided on the side of the ADF 200 facing the scanner unit 300. When the ADF 200 is closed with respect to the mounting table 373, the document placed on the mounting table 373 (literature table glass 375) is pressed by the document mat 203, and the reading surface of the document comes into close contact with the document table glass 375. Then, in a state where the original is pressed by the original mat 203 and is in close contact with the platen glass 375, the image of the original is read by moving the image reading unit in the −X axis direction.
In other words, the mounting table 373 has an opening 372, which is an example of a "first recess" in which a document is placed. The ADF 200 has a document mat 203, which is an example of a “document cover portion” that is inscribed in the opening 372 in the closed state. The document reading device 100 moves the image reading unit in the −X axis direction in the closed state, so that the document is pressed by the document mat 203 and is in close contact with the platen glass 375, and the image reading unit is moved in the −X axis direction. The image of the original is read by moving to.

As shown in FIG. 4, a back side cover 21 is provided on the back side of the printing device 10. The back side cover 21 can be opened and closed with the end 15 on the −X axis direction side of the housing 11 as a fulcrum. On the back side of the printing device 10, as shown by a broken line in the drawing, a control circuit 22 for controlling the entire printing system 1 is provided. When the back cover 21 is opened, the control circuit 22 is exposed.
Further, a back side cover 202 is provided on the back side of the ADF 200, and a back side cover 302 is provided on the back side of the scanner unit 300. The back side covers 202 and 302 are removable.

As shown in FIGS. 5 and 6, two hinges 110 that displace the ADF 200 in the open state or the closed state are arranged along the X-axis direction on the back surface side of the ADF 200. A control circuit 222 for controlling the ADF 200 is provided between the two hinges 110. Further, a relay board 23 is provided below the control circuit 222. The relay board 23 is fixed to the housing 11 of the printing device 10.

The relay board 23 is provided between the control circuit 22 of the printing device 10 (see FIG. 4) and the control circuit 222 of the ADF 200. The relay board 23 is arranged at a position closer to the control circuit 222 of the ADF 200 than the control circuit 22 of the printing device 10.
The control circuit 22 of the printing device 10 and the control circuit 222 of the ADF 200 can transmit and receive signals via a flexible flat cable (hereinafter referred to as FFC) 255 and 256. The control circuit 222 controls the ADF 200 based on the signal supplied from the control circuit 22 of the printing device 10.

For example, when the recording head of the printing device 10 is replaced, the FFC that electrically connects the control circuit 22 and the control circuit 222 needs to be attached to and detached from the connector each time the recording head is replaced.
Specifically, the FFC is removed from the connectors of the control circuit 22 and the control circuit 222, the document reading device 100 is opened to the printing device 10 (the state shown in FIG. 2), the recording head is replaced, and then the control circuit 22 is used. And it is necessary to attach the FFC to the connector of the control circuit 222 so that the document reading device 100 is closed to the printing device 10 (the state shown in FIG. 1).
However, every time the FFC is attached to or detached from the connector, the FFC is deformed, mechanical stress is applied to the FFC, and there is a possibility that the FFC may have a problem such as disconnection. When a defect occurs in the FFC, it is necessary to remove the defective FFC from the control circuit 22 and the control circuit 222 and attach a new FFC to the control circuit 22 and the control circuit 222.
Since the control circuit 22 and the control circuit 222 are separated from each other and various members are arranged between the control circuit 22 and the control circuit 222, it is assumed that the control circuit 22 and the control circuit are integrated into one FFC. When the FFC is connected to the 222, the handling of the FFC becomes complicated, it takes a lot of time and effort to attach / detach the FFC, and there is a possibility that new defects may be induced in other parts due to the attachment / detachment of the FFC.

In the present embodiment, a relay board 23 is provided between the control circuit 22 of the printing device 10 and the control circuit 222 of the ADF200.
The relay board 23 is provided with a connector 236 to which the FFC 256 is connected, and the control circuit 22 of the printing device 10 is provided with a connector (not shown) to which the FFC 256 is connected. The relay board 23 and the control circuit 22 of the printing device 10 are connected by an FFC 256.
Further, the relay board 23 is provided with a connector 235 to which the FFC 255 is connected, and the control circuit 222 of the ADF 200 is provided with the connector 225 to which the FFC 255 is connected. Specifically, the control circuit 222 of the ADF200 is provided with a connector 225 to which a partially branched FFC255a is connected. The relay board 23 and the control circuit 222 of the ADF 200 are electrically connected by the FFC 255.
In other words, the control circuit 22 of the printing device 10 and the control circuit 222 of the ADF 200 are electrically connected by the FFC 255 and 256 via the relay board 23. Since the relay board 23 is arranged near the control circuit 222, the length of the FFC 255 that connects the relay board 23 and the control circuit 222 of the ADF200 connects the relay board 23 and the control circuit 22 of the printing device 10. It is shorter than the length of FFC256.

With such a configuration, when the document reading device 100 is opened with respect to the printing device 10 or the document reading device 100 is closed with respect to the printing device 10 in order to replace the recording head, the ADF 200 It is only necessary to attach / detach the FFC 255 that connects the control circuit 222 and the relay board 23, and it is not necessary to attach / detach the FFC 256 that connects the control circuit 22 of the printing device 10 and the relay board 23. Therefore, the FFC 255 that connects the control circuit 222 of the ADF 200 and the relay board 23 is liable to be subjected to mechanical stress, and the FFC 255 is liable to malfunction. On the other hand, the FFC 256 that connects the control circuit 22 of the printing device 10 and the relay board 23 is less likely to be subjected to mechanical stress, and the FFC 256 is less likely to have a problem.

Further, the length of the FFC 255 connecting the control circuit 222 of the ADF 200 and the relay board 23 is shorter than the length of the FFC 256 connecting the control circuit 222 of the printing device 10 and the relay board 23. In addition, there are fewer obstacles (other members) between the control circuit 222 of the ADF200 and the relay board 23 than between the control circuit 22 of the printing device 10 and the relay board 23, which obstruct the wiring of the FFC 255. Therefore, the handling of the FFC 255 becomes easy. Therefore, the FFC 255 that connects the control circuit 222 of the ADF 200 and the relay board 23 can be easily replaced as compared with the FFC 256 that connects the control circuit 22 of the printing device 10 and the relay board 23.

As described above, in this embodiment, the relay board 23 arranged near the control circuit 222 of the ADF 200 is provided on the printing device 10 side, and the FFC 255 is easily replaced. Therefore, even if a problem occurs in the FFC 255 due to the replacement of the recording head, the FFC 255 can be easily replaced as compared with the case where the FFC 256 is replaced, and the stop loss due to the replacement of the FFC 255 can be reduced.

Further, on the back side of the ADF200, the control circuit 222 of the ADF200 is arranged so as to intersect the XY plane (horizontal plane). That is, the control circuit 222 is arranged diagonally. When the control circuit 222 is arranged diagonally, the dimension (depth) in the Y-axis direction of the control circuit 222 in the plan view seen from the Z-axis direction is compared with the case where the control circuit 222 is arranged horizontally along the XY plane. Directional dimensions) can be shortened.
In the following description, the state of intersecting the XY plane (horizontal plane) is referred to as an oblique or inclined state.

Further, when the control circuit 222 is arranged diagonally, the connector 225 to which the FFC 255 is connected is also arranged diagonally, and the FFC 255 can be easily attached and detached as compared with the case where the control circuit 222 and the connector 225 are arranged horizontally.
Specifically, when the control circuit 222 is arranged horizontally, the connector 225 to which the FFC 255 is connected is also arranged horizontally, the FFC 255 is moved horizontally on the upper side of the control circuit 222, and the FFC 255 is attached to and detached from the connector 225. There is a need to. However, another member (for example, wiring) is arranged on the upper side of the control circuit 222, and the horizontal movement of the FFC 255 may be hindered on the upper side of the control circuit 222. On the other hand, if the connector 225 to which the FFC 255 is connected is arranged diagonally, it is less likely to be affected by another member arranged on the upper side of the control circuit 222, and the FFC 255 can be easily attached and detached.

Further, it is conceivable to arrange the control circuit 222 so as to be orthogonal to the XY plane (horizontal plane). However, when the control circuit 222 is arranged so as to be orthogonal to the horizontal plane, the control circuit 222 is easily affected by the force in the horizontal direction. For example, a horizontal force acts on the control circuit 222, and the horizontal force deforms the member fixing the control circuit 222, so that the posture of the control circuit 222 is easily deformed.
Therefore, in order to improve the posture stability of the control circuit 222 and the ease of attaching and detaching the FFC 255, it is preferable to arrange the control circuit 222 diagonally.

As shown in FIGS. 7 and 8, a fixing member 310 for fixing the hinge 110 to the scanner unit 300 is attached to the back surface side of the scanner unit 300. The fixing member 310 is a pillar-shaped member having a quadrangular bottom surface (not shown) in a plan view seen from the Z-axis direction, and has a hollow inside.
The fixing member 310 is located on the side wall 311 located on the + X-axis direction side, the side wall 312 located on the −X-axis direction side, the rear wall 313 located on the −Y-axis direction side, and the + Y-axis direction side. It has a wall 314 on the front side. That is, the fixing member 310 is a hollow member surrounded by the side wall 311 and the side wall 312, the back side wall 313, and the front side wall 314.
Further, on the upper side of the side walls 311, 312, a notch (slit) 320, which is an example of the "engaged portion", is provided.
The wall 313 on the back side is a rectangular member long in the X-axis direction that connects the side wall 311 and the side wall 312. The wall 313 on the back side is composed of a member different from the side walls 311, 312 and the wall 314 on the front side. Two screw holes 307 are provided on the wall 313 on the back side. An adjusting screw 307a, which is an example of a "pressing portion", is screwed into the screw hole 307. The adjusting screw 307a presses the case 111 of the hinge 110.

Further, on the upper side of the wall 313 on the back side, a wall 315 formed by bending the side wall 311 and a wall 316 formed by bending the side wall 312 are provided. The walls 315 and 316 are arranged along the X-axis direction in the same manner as the wall 313 on the back side. The walls 315 and 316 are each provided with screw holes 308. A fixing screw 308a is screwed into the screw hole 308.

Further, an inclined wall 317 formed by bending the side wall 311 and inclined at an angle is provided. The inclined wall 317 is provided so as to project from the side wall 311 in the + X axis direction. Further, a slit 318c is provided between the side wall 311 and the inclined wall 317. The inclined wall 317 is provided with a screw hole 318 into which a screw 318a can be screwed.
Similarly, an inclined wall (not shown) formed by bending the side wall 312 is formed so as to project from the side wall 312 in the −X axis direction. The inclined wall has the same structure as the inclined wall 317, and a screw 318a can be screwed into the inclined wall.

A fixing member 37 is attached to the housing 11 of the printing apparatus 10. The fixing member 37 is fixed to the housing 11 of the printing apparatus 10 with screws and can be replaced. The fixing member 37 and the inclined wall 317 are fixed by screws 318a. Similarly, the fixing member 37 and the inclined wall formed by bending the side wall 312 are fixed by screws 318a.
The fixing member 37 is a member provided on the printing device 10 side. The inclined wall 317 is a member provided on the document reading device 100 (scanner unit 300) side. The printing device 10 and the document reading device 100 are fixed by a fixing member 37, an inclined wall 317, and screws 318a.

As described above, the printing device 10 and the document reading device 100 are connected by a connecting member 31 so that the document reading device 100 can be opened and closed with respect to the printing device 10. When the printing device 10 and the document reading device 100 are connected only by the connecting member 31, the document reading device 100 is not sufficiently fixed to the printing device 10, for example, when the document reading device 100 vibrates, the document reading device 100 The stability of the posture becomes worse. Therefore, in order to ensure the stability of the posture of the document reading device 100, the fixing member 37 and the inclined wall 317 (fixing member 310) are fixed by the screws 318a. That is, the printing device 10 and the document reading device 100 are connected (fixed) by a fixing member 310 in addition to the connecting member 31.
Since the inclined wall 317 is inclined and the screw hole 318 is also inclined, the screw 318a is screwed into the screw hole 318 for the same reason as in the case of the control circuit 222 as compared with the case where the inclined wall 317 is not inclined. It will be easier to make it.

Parts replacement (replacement of the recording head) of the printing device 10 and repair of the printing device 10 are carried out in a state where the document reading device 100 is open to the printing device 10 (state of FIG. 2). In order to open the document reading device 100 with respect to the printing device 10, it is necessary to remove the screws 318a that fix the fixing member 37 and the inclined wall 317.
However, if the document reading device 100 is opened with respect to the printing device 10 without removing the screws 318a that fix the fixing member 37 and the inclined wall 317, an extra force acts on the fixing member 37 and the inclined wall 317. ..
In the present embodiment, the slit 318c is provided between the side wall 311 and the inclined wall 317, and the mechanical strength of the inclined wall 317 is weakened. Therefore, when an extra force acts on the fixing member 37 and the inclined wall 317, The inclined wall 317 is deformed by the extra force. Further, the inclined wall 317 deformed by the extra force can be repaired to an appropriate state with pliers or the like.
Further, the extra force acting on the fixing member 37 and the sloping wall 317 is strong, and in addition to the sloping wall 317 being deformed, the fixing member 37 may be deformed. Even if the fixing member 37 is deformed by an extra force, the fixing member 37 can be restored to an appropriate state by replacing it with a new fixing member 37.
That is, even when the extra force acting on the fixing member 37 and the inclined wall 317 is strong, it is possible to prevent the fixing member 37 from being damaged and the main body (housing 11) of the printing device 10 from being damaged. ..

As described above, in the present embodiment, the document reading device 100 is opened with respect to the printing device 10 without removing the screws 318a for fixing the fixing member 37 and the inclined wall 317, and the fixing member 37 of the printing device 10 has a defect. Even if it does occur, the defect can be easily repaired by replacing it with a new fixing member 37. Therefore, it is possible to prevent the printing system 1 from being fatally damaged, which is difficult to repair.

As shown in FIGS. 7 and 9, the hinge 110 includes a case 111, a mounting member 113, a rotating shaft 115, and an urging member 117. The urging member 117 is composed of an elastic member and is housed in the case 111. Although details will be described later, the urging member 117 is a member for maintaining the ADF 200 in an open state. The mounting member 113 is a member for fixing the ADF 200 to the hinge 110. The ADF 200 is fixed to the mounting member 113. The case 111 is arranged on the −Z axis direction side with respect to the mounting member 113. The mounting member 113 is rotatably connected to the case 111 via a rotating shaft 115.
The hinge 110 is arranged on the back side of the scanner unit 300 so that the urging direction of the urging member 117 is the overlapping direction (Z-axis direction) of the scanner unit 300 and the ADF 200. Further, the hinge 110 is arranged on the back side of the scanner unit 300 so that the rotation shaft 115 is on the upper side with respect to the urging member 117.
The hinge 110 connects the scanner unit 300 and the ADF 200 so that the ADF 200 rotates about the rotation shaft 115 and can be opened and closed with respect to the scanner unit 300.

Since the ADF200 has a document transfer section 205 (for example, a motor, a cam, a belt, a shaft, etc.) for transporting documents inside, the ADF200 has a document transfer section 205 as compared with the case where the document transfer section 205 is not provided. The weight is heavy. As shown in FIG. 3, in the open state, the moment F1 that tries to close the ADF200 acts on the ADF200 by its own weight. On the other hand, the urging member 117 urges the ADF 200 with a moment F2 that opposes the moment F1 that tries to close the ADF 200.
In the following description, the moment F1 is referred to as a force F1, and the moment F2 is referred to as a drag force F2.
In this way, the force F1 that tries to close the state and the drag force F2 that tries to open the state act on the ADF200.

The urging member 117 is composed of an elastic member and is deformed by a force F1. For example, when the force F1 becomes stronger, the urging member 117 is greatly deformed, and the drag force F2 also becomes stronger. When the force F1 becomes weak, the urging member 117 is deformed to a small extent, and the drag force F2 also becomes weak. By forming the urging member 117 with an elastic member in this way, the drag force F2 changes in proportion to the change in the force F1.
In the present embodiment, the urging member 117 is provided so that the posture of the ADF 200 can be held at an arbitrary position in the opening / closing range of the ADF 200. Therefore, the force F1 for closing the state and the drag force F2 for opening the state become equivalent, and the open posture of the ADF 200 is maintained at an arbitrary position in the opening / closing range of the ADF 200.
Since the force F1 and the drag force F2 are equivalent at an arbitrary position in the opening / closing range of the ADF200, for example, when a weak force is newly applied to the ADF200, the ADF200 can be opened / closed, and the ADF200 can be used as a scanner unit. It can be easily opened and closed with respect to 300.
Further, in the case 111, the urging direction of the force urged from the urging member 117 is the overlapping direction (Z-axis direction) of the scanner unit 300 and the ADF 200.

The case 111 of the hinge 110 is housed in the fixing member 310 of the scanner unit 300, and is fixed to the fixing member 310 by the fixing screws 308a inserted into the screw holes 308 provided in the walls 315 and 316. That is, the case 111 of the hinge 110 and the fixing member 310 of the scanner unit 300 are fixed by the fixing screw 308a. In other words, the ADF 200 and the scanner unit 300 are fixed by the fixing screw 308a.
The case 111 is located below the rotation shaft 115 and has a surface 111a that intersects the rotation shaft 115 in the axial direction (X-axis direction). The surface 111a is arranged on the + X axis direction side. Further, a surface (not shown) facing the surface 111a is arranged on the −X axis direction side. A convex portion 121, which is an example of an "engaging portion", is provided on each of the surface 111a and the surface arranged to face the surface 111a. The convex portion 121 is formed by bending a part of the case 111, and protrudes to the outside of the case 111. Further, the convex portion 121 is engaged with the slits 320 provided in the side walls 311, 312 of the fixing member 310, and the tip of the convex portion 121 projects to the outside of the fixing member 310.
As described above, the convex portion 121 is formed in the case 111 that accommodates the urging member 117.

FIG. 10 is a schematic plan view showing a state in which the convex portion and the slit are engaged with each other. Further, FIG. 10 is a schematic plan view of the surface 111a of the case 111 when viewed from the X-axis direction.
In FIG. 3, the force F1 for closing the ADF200 can be decomposed into a component force F1A in the + Y-axis direction and a component force F1A in the −Z-axis direction. In FIG. 10, the component force F1A is illustrated by a solid arrow.

As shown in FIG. 10, the slit 320 has an upper convex portion 320a provided on the upper side of the side wall 311 and located on the + Y-axis direction side, and a lower convex portion 320a provided on the lower side of the side wall 311 and located on the −Y-axis direction side. It has a part 320b.
In a plan view seen from the X-axis direction, the convex portion 121 of the case 111 is arranged inside the slit 320 of the fixing member 310 between the upper convex portion 320a and the lower convex portion 320b. When the force F1 acts on the ADF200, the component force F1A acts on the hinge 110 (convex portion 121) to which the ADF200 is fixed.
The component force F1A (force in the + Y-axis direction) acts on the + Z-axis direction side (upper side) of the convex portion 121. When acting on the + Z-axis direction side of the convex portion 121, the convex portion 121 tries to rotate with the portion where the convex portion 121 and the upper convex portion 320a are in contact as a fulcrum, so that the force in the direction opposite to the component force F1A (-Y axis). The force in the direction) acts on the −Z axis direction side (lower side) of the convex portion 121.
The upper convex portion 320a suppresses the movement of the convex portion 121 on the + Z axis direction side so that the + Z axis direction side of the convex portion 121 does not move due to the component force F1A (force in the + Y axis direction). The lower convex portion 320b moves the convex portion 121 on the −Z axis direction side so that the −Z axis direction side of the convex portion 121 does not move due to a force in the direction opposite to the component force F1A (force in the −Y axis direction). Suppress.
In this way, when the force F1 acts on the hinge 110, the upper convex portion 320a and the lower convex portion 320b are affected by the component force F1A so that the position of the convex portion 121 (hinge 110) does not change due to the component force F1A. To regulate.

Details will be described later, but when manufacturing the document reading device 100 or when maintaining or repairing the document reading device 100, the work of assembling the ADF 200 to the scanner unit 300, the work of removing the ADF 200 from the scanner unit 300, and the scanner of the ADF 200 again. The work of assembling to the unit 300 occurs. In such an operation of assembling the ADF 200 to the scanner unit 300, the force F1 acts on the ADF 200 and the component force F1A acts on the hinge 110 due to the weight of the ADF 200.
When the ADF200 is assembled to the scanner unit 300 with the convex portion 121 of the hinge 110 and the slit 320 of the fixing member 310 engaged, the upper convex portion 320a and the lower convex portion 320b are subjected to the component force F1A of the hinge 110. Since it works so that the position does not change, the influence of the component force F1A acting on the hinge 110 (the influence of the force F1 acting on the ADF200) is suppressed, and it becomes easy to properly assemble the ADF200 to the scanner unit 300. ..

If the force F3 indicated by the broken line arrow in the figure acts on the + Z-axis direction side of the convex portion 121, that is, when the force F3 in the −Y-axis direction acts on the + Z-axis direction side of the convex portion 121. As shown by the alternate long and short dash line in the figure, the convex portion 121 moves so as to be separated from the upper convex portion 320a in a state of being in contact with the lower convex portion 320b. That is, the portion where the convex portion 121 and the lower convex portion 320b are in contact becomes a fulcrum, the −Z axis direction side of the convex portion 121 moves in the + Y axis direction, and the + Z axis direction side of the convex portion 121 moves in the −Y axis direction. To do.
In this way, when the convex portion 121 of the hinge 110 and the slit 320 of the fixing member 310 are engaged with each other, when a force F3 in the −Y axis direction acts on the + Z axis direction side of the convex portion 121, the convex portion 121 and the convex portion 121 The portion in contact with the lower convex portion 320b serves as a fulcrum, and the convex portion 121 rotates counterclockwise.

When manufacturing the document reading device 100, the ADF 200 and the scanner unit 300 are assembled separately. Subsequently, the hinge 110 is attached to the ADF 200, and the fixing member 310 is attached to the scanner unit 300. After that, the hinge 110 attached to the ADF 200 is fitted into the fixing member 310 attached to the scanner unit 300, and the convex portion 121 of the hinge 110 is engaged with the slit 320 of the fixing member 310. Then, even when the force F1 acts due to the weight of the ADF 200, the ADF 200 is assembled to the scanner unit 300 in a state where the movement of the hinge 110 in the + Y axis direction is suppressed.

Subsequently, the adjusting screw 307a is screwed into the two screw holes 307 provided in the wall 313 on the back side. Since the adjusting screw 307a (screw hole 307) is arranged on the −Z axis direction side with respect to the convex portion 121 and the slit 320, the tip of the adjusting screw 307a presses the −Z axis direction side of the case 111 of the hinge 110. .. In other words, the convex portion 121 is formed on the case 111 accommodating the urging member 117, and the adjusting screw 307a presses the hinge 110 (case 111) from the back surface side of the scanner portion 300 in the −Z axis direction. Then, a force in the + Y-axis direction acts on the −Z-axis direction side of the case 111.
In a state where the convex portion 121 and the slit 320 are engaged, the portion where the convex portion 121 and the lower convex portion 320b are in contact becomes a fulcrum, and the convex portion 121 can rotate counterclockwise, so that the case 111 When a force in the + Y-axis direction acts on the −Z-axis direction side of the above, the portion where the convex portion 121 and the lower convex portion 320b are in contact becomes a fulcrum, the convex portion 121 rotates counterclockwise, and the + Z of the hinge 110 The position in the Y-axis direction changes on the axial side.
Therefore, by screwing the adjusting screw 307a into the screw hole 307, the position of the hinge 110 (ADF200) in the Y-axis direction on the −Z-axis direction side can be adjusted (finely adjusted). That is, the ADF 200 can be properly positioned with respect to the scanner unit 300.

Then, after the position of the hinge 110 in the Y-axis direction on the −Z-axis direction side is adjusted to the target position and the ADF200 is properly positioned with respect to the scanner unit 300, the screw holes 308 provided in the walls 315 and 316 are filled. The fixing screw 308a is screwed to fix the ADF 200 and the scanner unit 300.
In this way, when manufacturing the document reading device 100, the hinge 110 attached to the ADF 200 is fitted into the fixing member 310 of the scanner unit 300, and the convex portion 121, the slit 320, and the adjusting screw 307a are used with respect to the scanner unit 300. After adjusting the position of the ADF 200 in the Y-axis direction, the ADF 200 and the scanner unit 300 can be fixed to the scanner unit 300 with high accuracy by fixing the ADF 200 and the scanner unit 300 with the fixing screw 308a.

As described above, the "positioning mechanism" in the present application is located below the rotating shaft 115 and faces the surfaces 111a and 111a intersecting the axial direction (X-axis direction) of the rotating shaft 115 of the hinge 110. Below the positions of the convex portion 121 (engaging portion) formed on the surface to be formed, the slit 320 (engaged portion) formed on the scanner portion 300 and engaging with the convex portion 121, and the convex portion 121 and the slit 320. It is composed of an adjusting screw 307a that presses the hinge 110 from the back side of the scanner unit 300. Then, the positioning mechanism described above adjusts the positions of the scanner unit 300 and the hinge 110 (ADF200) in the Y-axis direction by the engagement between the convex portion 121 and the slit 320 and the adjusting screw 307a.
In this embodiment, a plurality (two) hinges 110 are arranged. Then, the above-mentioned positioning mechanism can be used for positioning the scanner unit 300 and the respective hinges 110 in the Y-axis direction. As a result, the ADF 200 can be assembled to the scanner unit 300 with high accuracy.

11 and 12 are schematic views showing a state of a recess provided in the exterior member of the scanner unit.
In addition to the positioning mechanism described above, the present embodiment has a configuration in which the position of the ADF 200 with respect to the scanner unit 300 can be adjusted in the work of assembling the ADF 200 to the scanner unit 300. The details will be explained with reference to.
As shown in FIG. 3, the exterior member 380 of the scanner unit 300 is provided with a recess 331 and a recess 332 which is an example of the “third recess”. The recess 331 is provided at the end of the exterior member 380 of the scanner unit 300 on the −Y axis direction side, and is located on the −Y axis direction side with respect to the platen glass 374. The recess 332 is an end portion of the exterior member 380 of the ADF 200 on the + Y-axis direction side, is provided at the end portion on the + X-axis direction side, and is located on the + X-axis direction side with respect to the platen glass 374.
A recess 341 and a recess 342, which is an example of the "second recess", are provided on the surface of the ADF 200 facing the exterior member 380 (scanner unit 300). That is, recesses 341 and 342 are formed at least on the free end side (+ Y axis direction side) of the hinge 110 of the hinge 110 with respect to the rotation shaft 115. The recesses 341 and 342 are through-holes provided in the housing of the ADF200. In a plan view seen from the Z-axis direction in the closed state, the recess 331 and the recess 341 overlap in a plane, and the recess 332 and the recess 342 overlap in a plane. In other words, in the closed state, the recess 341 is formed so as to overlap the recess 331 in a plane view from the Z-axis direction, and the recess 342 is formed so as to overlap the recess 332 in a plane.

A pin 330, which is an example of a "convex portion", is arranged on the ADF200 (see FIGS. 13 and 14). As shown by the broken line in FIG. 11, the pin 330 is arranged between the convex portion 330a projecting in the + Z axis direction, the convex portion 330c projecting in the −Z axis direction, and the convex portion 330a and the convex portion 330c. It has a flat portion 330b. In a plan view in the direction from the convex portion 330a to the convex portion 330c, the convex portions 330a, 330c and the flat portion 330b are circular, and the outer diameter (diameter) of the flat portion 330b is larger than the outer diameter of the convex portions 330a, 330c. Is also getting bigger. Further, the convex portion 330a and the convex portion 330c have the same shape, and the pin 330 has a configuration in which the convex portions (convex portions 330a, 330c) having the same shape are arranged to face each other with the flat portion 330b interposed therebetween. ..
As shown in FIG. 11, a hole (through port) 331a into which any of the convex portions 330a and 330c can be fitted is provided in the center of the concave portion 331. Then, any of the convex portions 330a and 330c can be fitted into the hole 331a of the concave portion 331. That is, the convex portion 330a can be fitted into the concave portion 331, or the convex portion 330c can be fitted into the concave portion 331.

Further, any of the convex portions 330a and 330c can be fitted into the concave portion 332 as well as the concave portion 331. In addition, any of the convex portions 330a and 330c can be fitted into the two concave portions 341 and 342 provided on the surface of the ADF200 facing the exterior member 380, similarly to the concave portion 331.

The pin 330 is removable from the recesses 331 and 332.
In the following description, the state in which the pin 330 is attached to the recesses 331 and 332 is referred to as a mounted state, and the state in which the pin 330 is removed from the recesses 331 and 332 is referred to as a detached state.
For example, when the convex portion 330a is fitted into the concave portion 331, the convex portion 330c protrudes from the exterior member 380, and a new convex portion (convex portion 330c) can be formed on the exterior member 380. That is, in the mounted state in which the pin 330 is attached to the concave portion 331, a new convex portion (convex portion 330c) is formed on the exterior member 380. When the exterior member 380 is closed with the new convex portion (convex portion 330c) formed, the new convex portion (convex portion 330c) can be fitted into the concave portion 341 of the ADF200. In other words, when the exterior member 380 is closed with the new convex portion (convex portion 330c) formed, the new convex portion (convex portion 330c) and the concave portion 341 can be engaged with each other.
Similarly, when the convex portion 330a is fitted into the concave portion 332, the convex portion 330c protrudes from the exterior member 380, and a new convex portion (convex portion 330c) can be formed on the exterior member 380. When the exterior member 380 is closed with the new convex portion (convex portion 330c) formed, the new convex portion (convex portion 330c) can be fitted into the concave portion 342 of the ADF200. In other words, when the exterior member 380 is closed with the new convex portion (convex portion 330c) formed, the new convex portion (convex portion 330c) and the concave portion 342 can be engaged with each other.

In the document scanning apparatus 100, since the recesses 331 and 332 and the recesses 341 and 342 overlap in a plane in the closed state, the new convex portion (convex portion 330c) formed on the exterior member 380 and the ADF200 in the closed state The state in which the recesses 341 and 342 are engaged is a state in which the recesses 331 and 332 and the recesses 341 and 342 are properly overlapped in a plane, and the ADF 200 is properly aligned with the scanner unit 300. Is.
Therefore, when the relative positions of the ADF 200 and the scanner unit 300 are adjusted so that the new convex portion (convex portion 330c) formed on the exterior member 380 in the mounted state and the concave portions 341 and 342 are engaged with each other, the scanner unit The position of the ADF 200 with respect to 300 can be adjusted appropriately. In other words, in the present embodiment, the pin 330 is detachable from the recesses 331 and 332 formed in the scanner portion 300, and the new convex portion (convex portion 330c) formed in the exterior member 380 in the mounted state. The scanner unit 300 and the ADF200 are aligned with each other in a state where the recesses 341 and 342 of the ADF200 are fitted to each other.
Further, in the closed state when the position of the ADF 200 in the Y-axis direction is adjusted by the positioning mechanism described above, the new convex portion (convex portion 330c) formed on the exterior member 380 and the concave portions 341 and 342 of the ADF 200 are engaged with each other. Then, it can be confirmed that the adjustment by the positioning mechanism is appropriate.

In the work of assembling the ADF 200 to the scanner unit 300 when manufacturing the document reading device 100 or when maintaining or repairing the document reading device 100, first, the recesses 341, 342, the pins 330, and the recesses 331, 332 are used. By adjusting the relative positions of the scanner unit 300 and the ADF 200, and then adjusting the position of the ADF 200 with respect to the scanner unit 300 by the positioning mechanism described above, the ADF 200 can be assembled to the scanner unit 300 efficiently and with high accuracy.

Further, in the work of assembling the ADF 200 to the scanner unit 300, first, the position of the ADF 200 with respect to the scanner unit 300 is adjusted by the positioning mechanism described above, and then the recesses 341, 342, the pins 330, and the recesses 331, 332 are used. After confirming whether the position of the ADF 200 with respect to the scanner unit 300 is appropriate, if the positioning mechanism (convex portion 121, slit 320, adjustment screw 307a) is fixed with the fixing screw 308a, the ADF 200 can be assembled to the scanner unit 300 with high accuracy. it can.
That is, it has recesses 341 and 342 formed at least on the free end side of the scanner portion 300 of the ADF 200 and pins 330 arranged on the scanner portion 300, and the recesses 341 and 342 and the convex portions of the scanner portion 300 (mounted). It is preferable that the positioning mechanism (convex portion 121, slit 320, adjusting screw 307a) is fixed in a state where the scanner unit 300 and the ADF 200 are aligned with each other (convex portion formed by the state). ..

In the present embodiment, in non-routine work such as manufacturing the document scanning device 100 or maintaining or repairing the document scanning device 100, the pins 330 are fitted into the recesses 331 and 332, and a new convex portion is formed on the exterior member 380. Is formed to confirm that the scanner unit 300 and the ADF 200 are properly aligned, or that the scanner unit 300 and the ADF 200 are properly aligned.
However, in routine work (normal use) such as when the printing device 10 prints an image on paper or when the document reading device 100 reads an image of a document, the pin 330 is fitted into the recesses 331 and 332 to form an exterior. No new protrusions formed on the member 380 are required. Further, if the exterior member 380 has an unnecessary convex portion, there is a possibility that the unnecessary convex portion may cause a problem such as bending of the edge of the paper or the original.
Therefore, in the present embodiment, the pin 330 is housed in the ADF 200 during steady work (normal use), and the pin 330 can be taken out from the ADF 200 during non-steady work. Therefore, in the present embodiment, the pin 330 does not form an unnecessary convex portion during steady work, and the problem due to the unnecessary convex portion does not occur. Further, during steady work, the recess 332 is capped by a cap (not shown) to prevent foreign matter from entering the recess 332.
It should be noted that the recesses 331, 341 and 342 may also be capped by a cap in the same manner as the recesses 332 during regular work.

As shown in FIG. 12, the recess 332 supports a hole 332a, which is an example of a "second through hole" through which the screw 340 indicated by a broken line in the drawing can be passed, and a flat portion 330b of the pin 330. A possible support portion 332b is provided. The hole 332a is provided in the center of the recess 332, and the support portion 332b is provided so as to surround the hole 332a.
With such a configuration, in addition to being able to penetrate the screw 340 through the recess 332, the pin 330 can be fitted into the recess 332 while the flat portion 330b is supported by the support portion 332b. When the pin 330 is fitted into the concave portion 332, either the convex portion 330a or 330c protrudes from the concave portion 332, and a new convex portion can be formed on the exterior member 380.
With such a configuration, the screw 340 can be passed through the recess 332 and the recess 342 in the closed state, and the ADF 200 and the scanner unit 300 can be fixed so that the ADF 200 is not opened and closed with respect to the scanner unit 300. Further, by removing the screw 340 penetrated through the recess 332 and the recess 342, the ADF 200 can be returned to a state in which it can be opened and closed with respect to the scanner unit 300.

The work of replacing the recording head is performed with the document reading device 100 open to the printing device 10 (the state shown in FIG. 2). Even when the document reading device 100 is opened with respect to the printing device 10, a force for opening the ADF 200 from the scanner unit 300 is urged from the hinge 110 to the ADF 200.
Therefore, when the document reading device 100 is opened from the printing device 10 in order to replace the recording head, the ADF 200 moves faster than the scanner unit 300 due to the force urged from the hinge 110, and the ADF 200 moves with respect to the scanner unit 300. May open suddenly. Further, when the ADF200 tries to deviate from the predetermined opening / closing range, a force for suppressing the sudden movement of the ADF200 is urged, a strong impact is applied to the ADF200, and the ADF200 may be mechanically damaged. ..

Therefore, in the present embodiment, when the recording head is replaced, the screw 340 is passed through the recess 332 and the recess 342, the ADF 200 and the scanner unit 300 are fixed, and then the document reading device 100 is attached to the printing device 10. It is opened so that the above-mentioned sudden movement of the ADF200 (strong impact on the ADF200) does not occur.
Then, when the recording head is replaced and the document reading device 100 is closed with respect to the printing device 10, the screw 340 penetrated through the recess 332 and the recess 342 is removed, and the ADF 200 can be opened and closed with respect to the scanner unit 300. I'm back to.
Further, even in unsteady work other than parts replacement such as when the printing device 10 is maintained or repaired, the screw 340 is passed through the recess 332 and the recess 342 to fix the ADF 200 and the scanner unit 300, and then the printing device 10 is used. On the other hand, when the document reading device 100 is opened and the maintenance or repair of the printing device 10 is completed, the screw 340 penetrated through the recess 332 and the recess 342 is removed, and the ADF 200 is returned to a state where it can be opened and closed with respect to the scanner unit 300. There is.
In other words, the scanner unit 300 can be opened with respect to the lower structure (printing device 10) of the scanner unit 300 with the lower portion of the rotation shaft 115 of the hinge 110 as the rotation axis, and the recesses 341 and 342 are through ports. The recess 332 formed of the above and to which the pin 330 is attached / detached has a hole 332a that is communicated with the inside of the scanner unit 300 by removing the pin 330, and is formed through the recess 342 and the hole 332a of the recess 332. The ADF 200 and the scanner unit 300 can be fastened with the screw 340. With such a configuration, when the scanner unit 300 is opened with respect to the printing device 10 with the lower side of the rotation shaft 115 of the hinge 110 as the rotation axis, the above-mentioned sudden movement of the ADF 200 (strong impact on the ADF 200) is suppressed.
The structure is not limited to the configuration in which the screw 340 is passed through the recess 332 and the recess 342 to fix the ADF 200 and the scanner unit 300. A new through hole is provided in the ADF 200 and the scanner unit 300, and a screw is provided for the new through hole. The configuration may be such that the ADF 200 and the scanner unit 300 are fixed by penetrating the 340.

FIG. 13 is a perspective view showing a state in which pins and screws are housed. FIG. 14 is an enlarged view of a portion where the pin is housed.
The screw 340, like the pin 330, is used in non-routine work and not in routine work. Therefore, in the present embodiment, the pin 330 and the screw 340 are housed in the ADF 200 during steady work and can be taken out from the ADF 200 during non-steady work.
Specifically, as shown in FIGS. 13 and 14, the side cover 231 provided on the side surface of the ADF 200 can be opened and closed, and the inside of the ADF 200 can be exposed by opening the side cover 231. With the side cover 231 opened and the inside of the ADF 200 exposed, the two pins 330 are housed in site 233 and the screws 340 are housed in site 234.
Specifically, two pins 330 can be inserted into the portion 233, and a screw 335 can be screwed between the two pins 330. Then, at the portion 233, after the two pins 330 are inserted, the screw 335 is screwed, the two pins 330 are pressed by the screw 335, and the two pins 330 are fixed to the portion 233.
A screw 340 can be screwed into the portion 234, and the screw 340 is screwed into the portion 234 to fix the screw 340 to the portion 234.
Further, the portion 233 and the portion 234 are arranged at the end of the ADF200 on the + X axis direction so that the screw 340 and the pin 330 are located close to each other.

Since the pin 330 and the screw 340 are housed inside the ADF 200, the problem that the pin 330 and the screw 340 are lost in the steady work is unlikely to occur.
Further, since the pins 330 and the screws 340 are arranged close to each other, it becomes easier to take out the pins 330 and the screws 340 during unsteady work as compared with the case where the pins 330 and the screws 340 are arranged far from each other. Further, the state of the pin 330 and the screw 340 can be easily grasped. For example, if an abnormality occurs in which either the pin 330 or the screw 340 is lost, the abnormality can be detected quickly.

FIG. 15 is a schematic cross-sectional view of the ADF between DD in FIG. FIG. 16 is a schematic cross-sectional view of the region E surrounded by the alternate long and short dash line of FIG. FIG. 17 is a schematic cross-sectional view of the region F surrounded by the alternate long and short dash line in FIG. FIG. 18 is a schematic cross-sectional view of the region G surrounded by the alternate long and short dash line of FIG.
In FIGS. 15 to 18, the components necessary for explanation are shown, and the components not necessary for explanation are omitted.

As shown in FIGS. 15 and 16, the ADF 200 has a resin member 350 and a sheet metal member 360 arranged in order from the side of the hinge 110. The resin member 350 is a member that serves as a base for the ADF 200, and is arranged in almost the entire area of the ADF in a plane viewed from the Z-axis direction. The sheet metal member 360 is a member provided for increasing the mechanical strength of the resin member 350. By providing the sheet metal member 360, the resin member 350 can be arranged along the XY plane (horizontal plane). A document mat 203 is attached to the side of the resin member 350 facing the scanner unit 300 (see FIG. 3).
Further, the sheet metal member 360 is composed of a first member 361 arranged on the + Z axis direction side and a second member 362 arranged on the −Z axis direction side. The first member 361 is arranged in almost the entire area of the ADF in a plane viewed from the Z-axis direction. The second member 362 is located near the hinge 110.

In the plan view seen from the Z-axis direction, the first member 361 and the second member 362 are arranged in the area where the hinge 110 is arranged, and the area other than the area where the hinge 110 is arranged is compared with the area other than the area where the hinge 110 is arranged. The mechanical strength is further increased.
In the following description, the region where the hinge 110 is arranged in the plan view from the Z-axis direction is referred to as the region where the hinge 110 is arranged.
As shown in FIGS. 16 to 18, in the region where the hinge 110 is arranged and the region near the region where the hinge 110 is arranged, the resin member 350, the second member 362, and the first member 361 are located. They are arranged in order in the + Z axis direction. Further, two screws 365 and 366 for fastening the resin member 350, the second member 362, and the first member 361 are provided by the screw action. The screw 365 is arranged on the −Y axis direction side (the end portion of the ADF200 on the −Y axis direction side) as compared with the screw 366.
In the region away from the region where the hinge 110 is arranged, the resin member 350 and the first member 361 are sequentially arranged in the + Z axis direction. Further, two screws 367 and 368 for fastening the resin member 350 and the first member 361 are provided by the screw action. The screw 367 is arranged near the center of the ADF200 in the Y-axis direction, and the screw 368 is arranged at the end of the ADF200 on the + Y-axis direction side.
As described above, in the ADF200, the screw 365, the screw 366, the screw 367, and the screw 368 are arranged in order from the end portion on the −Y axis direction side to the end portion on the + Y axis direction side.

The resin member 350 has a screw hole 355 into which a screw 365 can be screwed, a screw hole 356 in which a screw 366 can be screwed, a screw hole 357 in which a screw 367 can be screwed, and a screw 368. Is provided with a screw hole 358 into which the screw can be screwed. Further, the first member 361 is provided with a through hole through which the screws 365, 366, 367, 368 can be passed.
Near the center of the ADF200, a screw 367 is screwed into a screw hole 357 of the resin member 350, and the sheet metal member 360 (first member 361) is fastened by the screw 367 and the resin member 350 (see FIG. 17). Similarly, at the end of the ADF200 on the + Y axis direction, the screw 368 is screwed into the screw hole 358 of the resin member 350, and the sheet metal member 360 (first member 361) is tightened by the screw 368 and the resin member 350. (See FIG. 18).

On the other hand, at the end of the ADF200 on the −Y axis direction, the screws 365 and 366 are screwed into the screw holes 355 and 356 of the resin member 350. However, the sheet metal member 360 (first member 361, second member 362) is not tightened by the screws 365 and 366 and the resin member 350. That is, gaps 365a and 366a are provided between the sheet metal member 360 and the screws 365 and 366.
Specifically, in the region where the hinge 110 is arranged, the surface of the screw hole 355 in contact with the screw 365 is located on the higher side (+ Z axis direction side) than the sheet metal member 360 (first member 361), and the screw 365 is inserted. When screwed into the screw hole 355 of the resin member 350, a gap 365a is formed between the sheet metal member 360 and the screw 365. Further, in a region near the region where the hinge 110 is arranged, the surface of the screw hole 356 in contact with the screw 366 is located on the higher side (+ Z axis direction side) than the sheet metal member 360 (first member 361). When the screw 366 is screwed into the screw hole 356 of the resin member 350, a gap 366a is formed between the sheet metal member 360 and the screw 366.

As described above, the hinge 110 gives the ADF 200 a force against the force F1 that the ADF 200 tries to close with respect to the scanner unit 300 (a drag force F2 that tries to open the ADF 200 with respect to the scanner unit 300) due to its own weight. It works against. At the portion where the ADF 200 is fixed to the hinge 110, the drag force F2 for opening the ADF 200 with respect to the scanner unit 300 becomes a force for the hinge 110 to lift the ADF 200 (a force in the + Z axis direction).
In this way, the force that the hinge 110 tries to lift the ADF 200 is urged in the area where the hinge 110 is arranged.

If the sheet metal member 360 is tightened by the screws 365, 366 and the resin member 350 in the region where the hinge 110 is arranged, the sheet metal member 360 is deformed by the force that the hinge 110 tries to lift the ADF200. A problem occurs. For example, the force of the hinge 110 to lift the ADF 200 causes the sheet metal member 360 to undulate. Further, the sheet metal member 360 is also deformed in a region near the region where the hinge 110 is arranged.
Then, the resin member 350 is deformed so as to follow the shape of the sheet metal member 360, the document mat 203 attached to the side of the resin member 350 facing the scanner portion 300 is also deformed, and the ADF 200 is closed with respect to the scanner portion 300. In this case, the original placed on the platen glass 375 is not pressed uniformly by the document mat 203, the reading surface of the document does not evenly adhere to the platen glass 375, and the scanner unit 300 uniformly presses the document. There is a problem that it becomes difficult to read the image.

Therefore, in the present embodiment, a device is devised to suppress a defect that the sheet metal member 360 is deformed by the force that the hinge 110 tries to lift the ADF200.
Specifically, in the region where the hinge 110 is arranged, when the screw 365 is screwed into the screw hole 355 of the resin member 350, a gap 365a is formed between the sheet metal member 360 and the screw 365, and the hinge 110 is formed. The force for lifting the ADF 200 does not affect the sheet metal member 360. Further, in a region near the region where the hinge 110 is arranged, when the screw 366 is screwed into the screw hole 356 of the resin member 350, a gap 366a is formed between the sheet metal member 360 and the screw 366. The force with which the hinge 110 tries to lift the ADF 200 does not affect the sheet metal member 360.
With such a configuration, it is possible to suppress a problem that it becomes difficult for the scanner unit 300 to uniformly read the image of the original due to the deformation of the sheet metal member 360, the resin member 350, and the original mat 203.

FIG. 19 is a diagram corresponding to FIG. 17, and is a schematic cross-sectional view of a document reading device according to a modified example. In the region F of the document reading device 100 according to the modified example, the resin member 350 is provided with a recess 352, and the spring 354 is provided in the recess 352. This is the difference between FIGS. 19 and 17.
As shown in FIG. 19, in the resin member 350 near the center of the ADF 200, a recess 352 is provided near the screw 367, and further, an elastic member (spring 354) is formed in the recess 352. , A protrusion 353 to which an elastic member (spring 354) can be attached is provided. Further, an elastic member (spring 354) is attached to the protrusion 353 so that a force in the + Z axis direction can be urged from the elastic member (spring 354) to the sheet metal member 360.
With such a configuration, deformation of the sheet metal member 360 can be reliably suppressed.

FIG. 20 is a perspective view showing a state of the front side cover. FIG. 21 is a schematic cross-sectional view showing a fixed state of the front side cover and the main body of the ADF.
As shown in FIGS. 20 and 21, the front cover 201 is provided with a convex portion 241 projecting in the −Y axis direction and a rib 245 projecting in the −Y axis direction. Further, the convex portion 241 is provided with a screw hole 242, and the rib 245 is provided with an uneven portion 246. Three convex portions 241 are provided along the X-axis direction at the end of the front cover on the −Z-axis direction side. The ribs 245 are arranged on the + Z-axis direction side with respect to the convex portion 241 and are provided with three ribs 245 along the X-axis direction.
The front cover 201 is a member that is elongated in the X-axis direction, and has a portion in which the dimension in the Z-axis direction is reduced in the −X-axis direction side and a portion in which the dimension in the Z-axis direction is reduced in the + X-axis direction side. And have. The rib 245 is provided at a portion of the front side cover 201 where the dimension in the Z-axis direction is reduced.

The convex portion 241 is fixed to the main body portion 200A of the ADF 200 by a screw (not shown).
Further, the main body portion 200A is provided with a convex portion 211 that can be fitted into the concave-convex portion 246 of the rib 245 and a convex portion 212 that supports the concave-convex portion 246 of the rib 245 on the opposite side. Then, the front side cover 201 is attached to the main body portion 200A so that the rib 245 is arranged between the convex portion 211 and the convex portion 212. Then, the uneven portion 246 of the rib 245 is positioned and fixed by the convex portion 211. Further, the side of the rib 245 opposite to the uneven portion 246 is supported by the convex portion 212.
As described above, in the present embodiment, the front side cover 201 is fixed to the main body portion 200A of the ADF 200 by both the convex portion 241 and the rib 245.

Since the front side cover 201 is a member long in the X-axis direction, it is easily deformed (easily twisted) by an external force. For example, if the convex portion 241 and the main body portion 200A are simply fixed with screws, the front side cover 201 is easily deformed (easily twisted) when an external force acts on the front side cover 201.
In the present embodiment, since the front side cover 201 is fixed to the main body 200A of the ADF200 by both the convex portion 241 and the rib 245, the front side cover 201 is fixed to the main body 200A of the ADF200 only by the convex portion 241. Compared with the above, when the front side cover 201 is fixed to the main body 200A, the mechanical strength of the front side cover 201 is increased, and when an external force acts on the front side cover 201, the front side cover 201 is deformed. It becomes difficult.
In the front side cover 201, the portion where the dimension in the Z-axis direction is small is lower in mechanical strength than the portion where the dimension in the Z-axis direction is large. Therefore, the rib 245 is used as the Z of the front side cover 201. It is provided in a portion where the axial dimension is reduced, and the mechanical strength of the portion of the front side cover 201 where the Z-axis direction is reduced is increased.

That is, the front side cover 201 is provided with the convex portion 241 and the rib 245, and the front side cover 201 is fixed to the main body portion 200A of the ADF200 by both the convex portion 241 and the rib 245. Compared with the case where the cover 201 is fixed to the main body 200A of the ADF200, the problem that the front side cover 201 is deformed (twisted) when an external force is applied to the front side cover 201 is suppressed, and the rigidity of the front side cover 201 is suppressed. Can be enhanced.

FIG. 22 is an exploded perspective view of the exterior member of the scanner unit. FIG. 23 is an exploded perspective view of the sheet metal member. FIG. 24 is a perspective view of the exterior member. FIG. 25 is a schematic view showing the state of the first fixed portion. FIG. 26 is a schematic view showing a state of the fourth fixed portion. FIG. 27 is a schematic view showing a state of the fifth fixed portion.
Note that FIG. 25 is a schematic plan view of a portion where the first fixed portion 391 is formed when viewed from the Y-axis direction. FIG. 26 is a partial perspective view in which the fourth fixed portion 394 is formed. FIG. 27 is a schematic cross-sectional view of the exterior member 380 cut near the portion where the fifth fixing portion 395 is formed.

As shown in FIG. 22, the exterior member 380 is composed of an upper resin member 381, a sheet metal member 382, and a lower resin member 383. That is, the lower resin member 383, the sheet metal member 382, and the upper resin member 381 are laminated in this order in the + Z axis direction to form the exterior member 380.
An opening 371a is formed on the + X-axis direction side of the upper resin member 381, and the opening 371a of the upper resin member 381 becomes the opening 371 of the exterior member 380 (see FIG. 3). An opening 372a is formed on the −X-axis direction side of the upper resin member 381, and the opening 372a of the upper resin member 381 becomes the opening 372 of the exterior member 380 (see FIG. 3).

As shown in FIG. 23, the sheet metal member 382 is composed of four sheet metal members 382a, 382b, 382c, and 382d. The four sheet metal members 382a, 382b, 382c, and 382d are members having a U-shaped cross section, respectively. By using a member having a U-shaped cross section, it is possible to increase the mechanical strength while achieving compactness as compared with, for example, the shape of a flat plate. As described above, the sheet metal member 382 is formed by assembling the sheet metal member 382a, the sheet metal member 382b, the sheet metal member 382c, and the sheet metal member 382d, has a U-shaped cross section, and has mechanical strength while achieving compactness. Has been raised.

The sheet metal members 382a and 382b are arranged at the ends of the sheet metal member 382 on the + X axis direction side and the sheet metal member 382 on the −Y axis direction side. The sheet metal members 382c and 382d are arranged at the ends of the sheet metal member 382 on the −X axis direction side and the sheet metal member 382 on the + Y axis direction side. Further, the sheet metal members 382c and 382d are arranged at the lower and right corners (see FIG. 3) of the document reading device 100 which is floating from the printing device 10 by the space for providing the discharging unit 14.
The document reading device 100 (scanner section 300) side, which is in a floating state due to the space for providing the ejection section 14, is deformed by an external force because there is no portion (housing 11 of the printing device 10) that supports the document reading device 100. It's easy to do. If the document reading device 100 is deformed by an external force, there is a possibility that the ADF 200 may not properly convey the document or the scanner unit 300 may not properly read the image of the document.
In the present embodiment, since the mechanical strength of the scanner unit 300 side, which is floated by the space for providing the ejection unit 14, is increased by the sheet metal member 382, the document reading device 100 is less likely to be deformed by an external force. , The problem that the original is not properly conveyed in the ADF 200 and the problem that the image of the original cannot be read properly in the scanner unit 300 are suppressed.

As shown in FIG. 24, the exterior member 380 is provided with five types of fixing portions 391, 392, 393, 394, 395. The first fixing portion 391 positions and fixes the upper resin member 381 and the sheet metal member 382. The second fixing portion 392 positions and fixes the sheet metal member 382 and the lower resin member 383. The third fixing portion 393 positions and fixes the upper resin member 381 and the sheet metal member 382. The fourth fixing portion 394 positions and fixes the sheet metal member 382 and the lower resin member 383. The fifth fixing portion 395 positions and fixes the upper resin member 381 and the lower resin member 383.

The first fixing portion 391 and the second fixing portion 392 are provided at 10 positions at each end of the frame-shaped exterior member 380. The third fixing portion 393 is provided at one position at the end portion of the frame-shaped exterior member 380 on the + Y axis direction side. The fourth fixing portion 394 is provided at two positions at the end portion of the frame-shaped exterior member 380 on the −Y axis direction side. The fifth fixing portion 395 is provided at one position at each of the end portion on the + X axis direction side and the end portion on the −X axis direction side of the frame-shaped exterior member 380.
The number of the five types of fixing portions 391, 392, 393, 394, 395 is not limited to the above-mentioned contents and is arbitrary. The positions of the five types of fixing portions 391, 392, 393, 394, 395 are also not limited to the above-mentioned contents and are arbitrary.

The opening 371a of the upper resin member 381 forms the opening 371 of the exterior member 380, and the opening 372a of the upper resin member 381 forms the opening 372 of the exterior member 380.
As described above, the document is arranged so as to be in contact with the end of the opening 372 (that is, the end of the opening 372a), and the placement position of the document is determined by the opening 372 of the exterior member 380 (that is, the opening 372a of the upper resin member 381). It is determined. That is, the opening 372a of the upper resin member 381 serves as a reference for determining the placement position of the document.
The lower resin member 383 is arranged on the −Z axis direction side with respect to the platen glass 374 and 375. Further, the lower resin member 383 incorporates a moving mechanism (not shown) for moving the image reading unit. Then, the image reading unit moves along the longitudinal direction (X-axis direction) of the lower resin member 383. That is, the lower resin member 383 serves as a reference for determining the moving direction of the image reading unit.

When the image of the original is read without using the ADF200, the opening 372a of the upper resin member 381 serves as a reference for determining the placement position of the original, and the lower resin member 383 serves as a reference for determining the moving direction of the image reading unit. Therefore, if any of the opening 372a of the upper resin member 381 and the lower resin member 383 is displaced, it becomes difficult for the scanner unit 300 to correctly read the image of the original.
Therefore, it is necessary to correctly arrange the upper resin member 381 and the lower resin member 383 at predetermined positions and fix them so that the positional deviation does not occur. In the present embodiment, the upper resin member 381 and the lower resin member 383 are correctly arranged at predetermined positions by the five types of fixing portions 391, 392, 393, 394, 395, and are fixed so as not to cause misalignment. ing.

As shown in FIG. 25, the first fixing portion 391 has a recess 401 and a through hole 402 provided in the upper resin member 381, a through hole 403 provided in the sheet metal member 382, and a screw 411. .. The through hole 402 is arranged inside the recess 401 and penetrates the upper resin member 381.
The screw 411 is arranged between the head portion 412 arranged on the + Z axis direction side, the second shaft portion 414 arranged on the −Z axis direction side, and the head portion 412 and the second shaft portion 414. It has a uniaxial portion 413. The screw 411 has a circular shape when viewed in a plan view from the Z-axis direction. Further, in the screw 411, the outer diameter (diameter) of the head 412, the outer diameter of the first shaft portion 413, and the outer diameter of the second shaft portion 414 become smaller in this order. The screw 411 is made of metal (for example, iron) like the sheet metal member 382.
Further, the through hole 403 is formed with a spiral groove (not shown) into which the second shaft portion 414 of the screw 411 can be screwed.
With this configuration, in the first fixing portion 391, the screw 411 is screwed into the through hole 403 of the sheet metal member 382, and the upper resin member 381 and the sheet metal member 382 are positioned and fixed by the screw 411.

In the present embodiment, between the component of the first fixing portion 391 made of metal (sheet metal member 382, screw 411) and the component of the first fixing portion 391 made of resin (upper resin member 381). There is a gap in.
Specifically, the screw 411 is arranged so that the head portion 412 is in contact with the bottom surface 401a of the recess 401 of the upper resin member 381, and a gap 414a is provided between the upper resin member 381 and the sheet metal member 382. The size of the gap 414a is approximately 0.1 mm.
In addition, instead of providing a gap 414a between the upper resin member 381 and the sheet metal member 382, a gap may be provided between the head 412 and the bottom surface 401a of the recess 401 of the upper resin member 381. Further, a gap may be provided between the upper resin member 381 and the sheet metal member 382, and between the head portion 412 and the bottom surface 401a of the recess 401 of the upper resin member 381.
The first shaft portion 413 of the screw 411 is arranged inside the through hole 402 of the upper resin member 381, and a gap 413a is provided between the first shaft portion 413 of the screw 411 and the through hole 402 of the upper resin member 381. ing. The gap 413a between the first shaft portion 413 and the through hole 402 is provided on both the −X axis direction side of the first shaft portion 413 of the screw 411 and the + X axis direction side of the first shaft portion 413 of the screw 411. It is provided. The size of the gap 413a is approximately 0.3 mm.
The gap 413a arranged on the −X-axis direction side with respect to the first shaft portion 413 of the screw 411 and the gap 413a arranged on the + X-axis direction side with respect to the first shaft portion 413 of the screw 411 They may have the same dimensions or different dimensions.

The upper resin member 381 is a member long in the X-axis direction. The resin constituting the upper resin member 381 is more flexible than the metal constituting the sheet metal member 382 and is easily deformed. Further, when the upper resin member 381 is formed by molding the resin, the upper resin member 381 tends to warp due to the heat during the molding process. Therefore, it is difficult to finish the upper resin member 381 made of resin into a target shape.
Since the sheet metal member 382 is made of metal, it is possible to improve the mechanical accuracy as well as the mechanical strength as compared with the case where the sheet metal member 382 is made of resin. Therefore, the sheet metal member 382 can be processed into a target shape.
When the upper resin member 381 and the sheet metal member 382 are fixed by the screw 411, the shape of the upper resin member 381 is corrected so as to follow the shape of the sheet metal member 382. That is, the sheet metal member 382 has a role of correcting the shape of the upper resin member 381.

However, the upper resin member 381 and the sheet metal member 382 have different coefficients of thermal expansion, and the coefficient of thermal expansion of the upper resin member 381 is larger than the coefficient of thermal expansion of the sheet metal member 382. Therefore, when the exterior member 380 is heated, the upper resin member 381 expands more than the sheet metal member 382. If the upper resin member 381 and the sheet metal member 382 are tightened and fastened with the screw 411, and the exterior member 380 is heated due to the difference in the coefficient of thermal expansion between the upper resin member 381 and the sheet metal member 382, the upper resin member 381 Will be transformed.

In the first fixing portion 391, a gap 414a of approximately 0.1 mm is provided between the upper resin member 381 and the sheet metal member 382. Therefore, when the exterior member 380 is heated, the upper resin member 381 and the sheet metal member 381 are provided. It is possible to suppress a problem that the upper resin member 381 is deformed due to interference with the 382. Further, the distance between the upper resin member 381 and the sheet metal member 382 in the Z-axis direction is controlled to 0.1 mm or less. That is, when the upper resin member 381 and the sheet metal member 382 are fixed by the screw 411 in the first fixing portion 391, the distance between the upper resin member 381 and the sheet metal member 382 in the Z-axis direction is 0.1 mm or less. , The shape of the upper resin member 381 is corrected so as to follow the shape of the sheet metal member 382.
Further, since the screw 411 is made of metal like the sheet metal member 382, when the exterior member 380 is heated, the screw 411 expands more than the upper resin member 381. Since a gap 413a of 0.3 mm is provided between the screw 411 and the upper resin member 381, the screw 411 and the upper resin member when the exterior member 380 is heated and the screw 411 expands more than the upper resin member 381. It is possible to suppress a problem that the upper resin member 381 is deformed due to interference with the 381.

Although not shown, the second fixing portion 392 has the same configuration as the first fixing portion 391. That is, there is a gap between the component of the second fixing portion 392 made of metal (sheet metal member 382, screw 411) and the component of the second fixing portion 392 made of resin (lower resin member 383). Is provided.
In the second fixing portion 392, a gap of approximately 0.1 mm is provided between the lower resin member 383 and the sheet metal member 382. As a result, when the exterior member 380 is heated, the problem that the sheet metal member 382 and the lower resin member 383 interfere with each other and the lower resin member 383 is deformed can be suppressed. Further, the distance between the sheet metal member 382 and the lower resin member 383 in the Z-axis direction is controlled to 0.1 mm or less. That is, when the sheet metal member 382 and the lower resin member 383 are fixed by the screw 411 in the second fixing portion 392, the distance between the sheet metal member 382 and the lower resin member 383 in the Z-axis direction becomes 0.1 mm or less. As described above, the shape of the lower resin member 383 is corrected so as to follow the shape of the sheet metal member 382.

As shown in FIG. 26, in the fourth fixing portion 394, the lower resin member 383 is provided with a boss portion (convex portion) 421 protruding in the + Z axis direction, and the sheet metal member 382 is provided with a boss hole 422. In the fourth fixing portion 394, the sheet metal member 382 and the lower resin member 383 are positioned and fixed by fitting the boss portion 421 of the lower resin member 383 into the boss hole 422 of the sheet metal member 382.

Although not shown, the third fixed portion 393 has the same configuration as the fourth fixed portion 394. That is, in the third fixing portion 393, the upper resin member 381 is provided with a boss portion (convex portion) protruding in the −Z axis direction, and the sheet metal member 382 is provided with a boss hole. In the third fixing portion 393, the upper resin member 381 and the sheet metal member 382 are positioned and fixed by fitting the boss portion of the upper resin member 381 into the boss hole of the sheet metal member 382.

As shown in FIG. 27, in the fifth fixing portion 395, the upper resin member 381 is provided with a boss portion (convex portion) 416 protruding in the −Z axis direction, and the lower resin member 383 is provided with a pillar portion extending in the + Z axis direction. 417 is provided. Further, a boss hole 418 into which the boss portion (convex portion) 416 can be fitted is provided on the surface of the pillar portion 417 facing the upper resin member 381. In the fifth fixing portion 395, the boss portion 416 of the upper resin member 381 is fitted into the boss hole 418 provided in the pillar portion 417 of the lower resin member 383 to form the upper resin member 381 and the lower resin member 383. Is positioned and fixed.
In this way, in the fixing portions (third fixing portion 393, fourth fixing portion 394, fifth fixing portion 395) arranged in the central portion in the X direction and the central portion in the Y direction, the sheet metal member 382 and the resin member 381 , 383 without considering the difference in expansion rate, that is, without providing a gap, and regarding the difference in expansion rate between the sheet metal member 382 and the resin members 381 and 383, the end in the X-axis direction, After considering the difference in expansion rate between the sheet metal member 382 and the resin members 381 and 383 as a configuration to be absorbed by the fixing portions (first fixing portion 391, second fixing portion 392) arranged at the ends in the Y-axis direction. Therefore, positioning can be performed reliably.

As described above, in the present embodiment, the upper resin member 381, the sheet metal member 382, and the lower resin member 383 are positioned and fixed to each other by the five types of fixing portions 391, 392, 393, 394, 395. ..
Further, if the exterior member 380 is composed of only the upper resin member 381 and the lower resin member 383, the problem that it is difficult to finish the exterior member 380 into a target shape is processed with high accuracy between the upper resin member 381 and the lower resin member 383. By providing a possible sheet metal member 382 and making the shapes of the upper resin member 381 and the lower resin member 383 follow the shape of the sheet metal member 382, the exterior member 380 can be finished in a target shape.

1 ... printing system, 10 ... printing device, 100 ... document reading device, 110 ... hinge, 111 ... case, 111a ... surface, 115 ... rotating shaft, 117 ... urging member, 121 ... convex part, 200 ... ADF, 205 Document transport section, 300 ... Scanner section, 307 ... Screw hole, 307a ... Adjustment screw, 308 ... Screw hole, 308a ... Fixing screw, 37,310 ... Fixing member, 311, 312 ... Side wall, 313 ... Back side wall, 314 ... front wall, 315,316 ... wall, 317 ... sloping wall, 318 ... screw hole, 318a ... screw, 320 ... slit.

Further, the length of the FFC 255 connecting the control circuit 222 of the ADF 200 and the relay board 23 is shorter than the length of the FFC 256 connecting the control circuit 22 of the printing device 10 and the relay board 23. In addition, there are fewer obstacles (other members) between the control circuit 222 of the ADF200 and the relay board 23 than between the control circuit 22 of the printing device 10 and the relay board 23, which obstruct the wiring of the FFC 255. Therefore, the handling of the FFC 255 becomes easy. Therefore, the FFC 255 that connects the control circuit 222 of the ADF 200 and the relay board 23 can be easily replaced as compared with the FFC 256 that connects the control circuit 22 of the printing device 10 and the relay board 23.

On the other hand, at the end of the ADF200 on the −Y axis direction, the screws 365 and 366 are screwed into the screw holes 355 and 356 of the resin member 350. However, the sheet metal member 360 (first member 361, second member 362) is not fastened to the resin member 350 with screws 365 and 366. That is, gaps 365a and 366a are provided between the sheet metal member 360 and the screws 365 and 366.
Specifically, in the region where the hinge 110 is arranged, the surface of the screw hole 355 in contact with the screw 365 is located on the higher side (+ Z axis direction side) than the sheet metal member 360 (first member 361), and the screw 365 is inserted. When screwed into the screw hole 355 of the resin member 350, a gap 365a is formed between the sheet metal member 360 and the screw 365. Further, in a region near the region where the hinge 110 is arranged, the surface of the screw hole 356 in contact with the screw 366 is located on the higher side (+ Z axis direction side) than the sheet metal member 360 (first member 361). When the screw 366 is screwed into the screw hole 356 of the resin member 350, a gap 366a is formed between the sheet metal member 360 and the screw 366.

If the sheet metal member 360 is fastened to the resin member 350 with screws 365 and 366 in the region where the hinge 110 is arranged, the sheet metal member 360 is deformed by the force that the hinge 110 tries to lift the ADF200. A problem occurs. For example, the force of the hinge 110 to lift the ADF 200 causes the sheet metal member 360 to undulate. Further, the sheet metal member 360 is also deformed in a region near the region where the hinge 110 is arranged.
Then, the resin member 350 is deformed so as to follow the shape of the sheet metal member 360, the document mat 203 attached to the side of the resin member 350 facing the scanner portion 300 is also deformed, and the ADF 200 is closed with respect to the scanner portion 300. In this case, the original placed on the platen glass 375 is not pressed uniformly by the document mat 203, the reading surface of the document does not evenly adhere to the platen glass 375, and the scanner unit 300 uniformly presses the document. There is a problem that it becomes difficult to read the image.

FIG. 20 is a perspective view showing a state of the front side cover. FIG. 21 is a schematic cross-sectional view showing a fixed state of the front side cover and the main body of the ADF.
As shown in FIGS. 20 and 21, the front cover 201 is provided with a convex portion 241 projecting in the −Y axis direction and a rib 245 projecting in the −Y axis direction. Further, the convex portion 241 is provided with a screw hole 242, and the rib 245 is provided with an uneven portion 246. Three convex portions 241 are provided along the X-axis direction at the end of the front cover on the −Z-axis direction side. The ribs 245 are arranged on the + Z-axis direction side with respect to the convex portion 241 and are provided with three ribs 245 along the X-axis direction.
Front cover 201 is a member that is long in the X-axis direction, a portion size becomes large active Z-axis direction in the -X-axis direction side, the dimensions of the Z-axis direction on the + X-axis direction side becomes smaller Has a part. The rib 245 is provided at a portion of the front side cover 201 where the dimension in the Z-axis direction is reduced.

Claims (8)

A document reading unit having a mounting table for reading the mounted document,
A cover unit that is placed on the upper surface of the document reading unit and can be displaced between the open state and the closed state with respect to the above-mentioned table.
A hinge that connects the cover unit to the document reading unit so that it can be opened and closed by rotating around a rotation axis.
A positioning mechanism for positioning the document reading unit and the hinge in the front-rear direction of the device is provided.
The hinge is
The urging member that keeps the cover portion in the open state is included, the urging direction of the urging member is the direction in which the document reading portion and the cover portion overlap, and the rotation axis is relative to the urging member. It is arranged on the back side of the document reading unit so as to be on the upper side.
The positioning mechanism is
An engaging portion formed on a surface of the hinge that intersects the rotation axis in the axial direction and is located below the rotation axis.
An engaged portion formed on the document reading portion and engaged with the engaging portion,
A document reading device comprising the engaging portion and a pressing portion that is below the position of the engaged portion and presses the lower portion of the hinge from the back surface side of the document reading portion. The document reading device according to claim 1, wherein the engaging portion is formed in a case for accommodating the urging member, and the pressing portion presses the case. The document reading device according to claim 1 or 2, wherein a plurality of the hinges are arranged, and the positioning mechanism is used for positioning the document reading unit and the respective hinges in the front-rear direction of the device. The above-mentioned stand has a first recess in which the document is placed.
The document reading device according to any one of claims 1 to 3, wherein the cover portion has a document cover portion inscribed in the first recess in the closed state. Any one of claims 1 to 4, wherein the document reading unit has a reading window for reading the conveyed document, and the cover unit has a document conveying unit for conveying the document in the reading window. The document reading device according to item 1. A second recess formed at least on the free end side of the document reading portion of the cover portion, and
It has a convex portion arranged on the document reading unit, and has.
Any one of claims 1 to 5, wherein the positioning mechanism is fixed in a state where the second concave portion and the convex portion are engaged with each other and the document reading portion and the cover portion are aligned with each other. The document reader according to the above. The convex portion can be attached to and detached from the third concave portion formed in the document reading portion.
The document reading according to claim 6, wherein the document reading portion and the cover portion are aligned in a state where the convex portion and the second concave portion of the cover portion are fitted in the mounted state. apparatus. The document reading unit can be opened with respect to the lower structure of the document reading unit with the lower part of the rotation axis of the hinge as the rotation axis.
The second recess is formed by a through hole and is formed.
The third concave portion to which the convex portion is attached / detached has a second through-hole that communicates with the inside of the document reading portion by removing the convex portion.
The document reading device according to claim 7, wherein the cover portion and the document reading portion can be fastened to each other through the through hole and the second through port.

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