Image forming apparatus and image reading device

Abstract

To provide an image forming apparatus that efficiently uses an internal space while reducing the possibility that a cable is damaged, and an image reading device.SOLUTION: An image forming apparatus comprises: an image reading device 100; and a document conveying device 200 that is provided on an upper side of the image reading device and is attached with a cylindrical member CY having a through hole. The image reading device has an insertion hole IH penetrating in the vertical direction into which the cylindrical member is inserted, and the movement of the cylindrical member in the vertical direction along the insertion hole causes the document conveying device to move in the vertical direction relative to the image reading device. A lower end of the insertion hole has an inclined surface IN that is separated from the cylindrical member toward a lower part. The image forming apparatus further comprises a cable CA1 that is wired along a bottom face of the image reading device from the inside of the document conveying device through the through hole. When the document conveying device moves upward relative to the image reading device, the cylindrical member and the cable are pulled up, and the cable moves to be wired along the inclined surface.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present disclosure relates to an image forming apparatus and an image reading apparatus.

Background Art

[0002] In recent years, as disclosed in Patent Document 1 below, development of an image forming apparatus has been carried out. The image forming apparatus includes an image reading apparatus, a document conveying apparatus, and a cable.

[0003] The image reading apparatus reads an image drawn on a document. The document conveying apparatus is provided above the image reading apparatus so as to be openable and closable with respect to the image reading apparatus. The document conveying apparatus conveys the document to the image reading apparatus. The cable extends from electronic components inside the document conveying apparatus to electronic components below the image reading apparatus through a through hole of a cylindrical member extending in the vertical direction of the image reading apparatus. When the document conveying apparatus moves upward with respect to the image reading apparatus, this cable is pulled up along the cylindrical member. Therefore, a bent portion is provided in the cable.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] There is a right-angled corner between a cylindrical member passing through the image reading apparatus and the bottom surface of the image reading apparatus. Therefore, when the cable is arranged along the right-angled corner, when it is pulled up, it is strongly pressed against the right-angled corner. As a result, the cable may be damaged due to the right-angled bend.

[0006] Therefore, in some cases, a cable bending portion is formed at a position where the cable changes direction so as to suppress damage caused by bending of the cable. In this case, due to the presence of this bending portion, when the image reading device moves upward with respect to the image conveying device and the cable is pulled upward in the vertical direction along the through hole of the cylindrical member, the cable is prevented from being strongly pressed against the right-angled corner portion. Therefore, damage caused by pulling up the cable is suppressed.

[0007] However, if a bending portion is formed in the cable between the cylindrical member passing through the image reading device and the bottom surface of the image reading device, the bending portion will droop downward below the image reading device. Therefore, other components cannot be provided in the internal space of the image forming device below the image reading device. As a result, the internal space of the image forming device cannot be efficiently utilized.

[0008] As can be seen from the above, according to the above-described image forming device, even though the risk of damage to the cable can be reduced, its internal space cannot be efficiently utilized. Furthermore, it becomes difficult to miniaturize the image forming device.

[0009] The present disclosure has been made in view of the above problems. An object of the present disclosure is to provide an image forming device and an image reading device that can efficiently utilize the internal space while reducing the risk of damage to the cable.

Means for Solving the Problems

[0010] The image forming apparatus of the present disclosure includes an image reading device and a document conveying device provided above the image reading device. A cylindrical member having a through hole is attached to the document conveying device. The image reading device has an insertion hole penetrating in the vertical direction so that the cylindrical member is inserted therein. The document conveying device is movable in the vertical direction with respect to the image reading device by moving the cylindrical member in the vertical direction along the insertion hole. The lower end portion of the insertion hole has an inclined surface that separates from the cylindrical member as it goes downward. The document conveying device further includes a cable that is routed along the bottom surface of the image reading device from inside the document conveying device via the through hole. When the document conveying device moves upward with respect to the image reading device, the cylindrical member and the cable are pulled up along the through hole and move so that the cable is routed along the inclined surface.

[0011] The image reading device of the present disclosure is an image reading device that is attached to a document conveying device and has an insertion hole penetrating in the vertical direction into which a cylindrical member having a through hole can be inserted, and the document conveying device is movably attached in the vertical direction along the insertion hole. The lower end portion of the insertion hole has an inclined surface that separates from the cylindrical member as it goes downward. When the document conveying device moves upward with respect to the image reading device, the cylindrical member and the cable routed along the bottom surface of the image reading device from inside the document conveying device via the through hole are pulled up along the through hole and move so that the cable is routed along the inclined surface.

Brief Description of the Drawings

[0012]

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Figure 12

Embodiments for Carrying Out the Invention

[0013] Hereinafter, an image forming apparatus according to an embodiment of the present disclosure will be described with reference to the drawings. In the drawings, the same or equivalent elements are denoted by the same reference numerals, and overlapping descriptions will not be repeated.

[0014] FIG. 1 is a perspective view of a document conveyance apparatus 200 and an image reading apparatus 100 that constitute an image forming apparatus 1000 according to an embodiment. FIG. 2 is a front view of a document conveyance apparatus 200 and an image reading apparatus 100 that constitute an image forming apparatus 1000 according to an embodiment.

[0015] The image forming apparatus 1000 may be, for example, a copying machine that reads an image drawn on a sheet-like medium and prints the same image on another sheet-like medium. Further, the image forming apparatus 100 may be a printer that prints image data transmitted from an external terminal such as a computer on a sheet-like medium. Furthermore, the image forming apparatus 1000 may be a multifunction peripheral in which the functions of the aforementioned copying machine and printer and the functions of a fax and a scanner are integrated.

[0016] As shown in FIGS. 1 and 2, the image forming apparatus 1000 includes an image reading device 100, a document conveying device 200, and an image forming apparatus main body 300. The image reading device 100 is provided above the image forming apparatus main body 300 (only a part of the outer shape is shown) of the image forming apparatus 1000. The image reading device 100 is configured to read an image from a document. The document conveying device 200 is configured to convey a document to the document reading position of the image reading device 100 by a user. The document conveying device 200 is provided above the image reading device 100.

[0017] Based on the image data read by the image reading device 100 or the image data transmitted from an external terminal, the image forming apparatus 1000 forms a single-color or multi-color image on a predetermined sheet, which is a sheet-like medium, in the image forming apparatus main body 300.

[0018] The image reading device 100 includes a document placement table 110 and an image reading unit (not shown), etc. The image reading unit has a light source, a plurality of mirrors, an imaging lens, a line sensor, etc. The image reading unit reads an image drawn on the document surface and generates image data corresponding to the image. The upper surface of the document placement table 110 is formed of a transparent material. A display operation unit (not shown) for receiving an input operation by a user is provided on the front side of the document placement table 110. The display operation unit is, for example, an operation panel such as a touch panel and operation buttons.

[0019] The original document conveyance device 200 includes an original document pressing cover 210. The original document pressing cover 210 is attached to the original document placement table 110 so as to be openable and closable. When the original document pressing cover 210 is closed, the transparent material on the upper surface of the original document placement table 110 is covered by the original document pressing cover 210.

[0020] The image forming apparatus main body 300 has an image forming unit. Although not shown, the image forming unit forms an image with toner supplied from a toner cartridge. The image forming unit includes a photosensitive drum, a charger, an exposure unit, a developing device, a cleaner unit, an intermediate transfer belt unit, a transfer roller, a fixing unit, and the like. The image forming apparatus main body 300 forms an image on the paper fed from the paper cassette by these units and the like. The paper on which the image is formed is discharged to the discharge tray.

[0021] As shown by the white dashed arrows in FIGS. 1 and 2, the original document conveyance device 200 rotates around a virtual rotation axis AX (dashed-dotted line) provided on the back side thereof and opens with respect to the image reading device 100. Thereby, the original document placement surface of the image reading device 100 is exposed. When the original document conveyance device 200 is closed with the original document placed at the original document reading position, an image such as characters or patterns drawn on the original document can be read by the image reading device 100. Inside the image forming apparatus main body 300, an electronic circuit board 301 and the like are built in.

[0022] FIGS. 3 and 4 are, respectively, a bottom view of the image reading device 100 according to the embodiment and a partially enlarged bottom view showing the portion surrounded by the broken line in FIG. 3. FIGS. 5 and 6 are, respectively, a partially enlarged longitudinal sectional view and a partially enlarged transverse sectional view of the image reading device 100 according to the embodiment, which are sectional views taken along line V-V in FIG. 3 and line VI-VI in FIG. 2. FIGS. 7 and 8 are, respectively, first and second partially enlarged perspective views of the bottom surface 101 side of the image reading device 100 according to the embodiment.

[0023] As shown in FIGS. 3 to 8, the image reading apparatus 100 includes an insertion hole IH that penetrates in the thickness direction of the image reading apparatus 100, that is, in the vertical direction of the image reading apparatus 100. The insertion hole IH is provided in the vicinity of the rotation axis AX. The insertion hole IH has a rectangular-like shape in a cross section.

[0024] A cylindrical member CY that is attached to the document conveyance apparatus 200 and extends in the vertical direction along the insertion hole IH is inserted into the insertion hole IH. The cylindrical member CY has a first through hole TH1 and a second through hole TH2. The outer shape of the cross section of the cylindrical member CY forms a rectangle corresponding to the rectangular-like shape of the insertion hole IH. The cylindrical member CY has a positioning member PD for positioning the first cable CA1 inside. Since the cylindrical member CY is attached to the document conveyance apparatus 200, the document conveyance apparatus 200 and the cylindrical member CY can move in the vertical direction with respect to the image reading apparatus 100 by moving the cylindrical member CY in the vertical direction along the insertion hole IH.

[0025] Therefore, the cylindrical member CY moves in the vertical direction along the insertion hole IH. As a result, the first cable CA1 and the cylindrical member CY move integrally in the vertical direction along the insertion hole IH. Thereby, the cylindrical member CY protects the first cable CA1 because the first cable CA1 that moves up and down may be damaged due to contact with the inner peripheral surface of the insertion hole IH.

[0026] The lower end of the insertion hole IH has an inclined surface IN that moves away from the cylindrical member CY as it goes downward in the image reading apparatus 100. In other words, the inclined surface IN is inclined from the outside to the inside of the image reading apparatus 100 as it goes downward in the image reading apparatus 100. The inclined surface IN is inclined so as to intersect the vertical plane VP and the horizontal plane HP at an intersection angle of 45 degrees. Therefore, the inclined surface IN intersects the bottom surface 101 of the image reading apparatus 100 at an obtuse angle (135 degrees: see FIGS. 5 and 10). Also, the inclined surface IN intersects the inner surface of the insertion hole IH at an obtuse angle (135 degrees: see FIGS. 5 and 10). Therefore, the inclined surface IN is inclined so that the horizontal cross section (opening) of the insertion hole IH of the through hole of the image reading apparatus 100 widens as it goes downward. Also, the inclined surface IN is inclined so as to approach the locking portion F1 in the cross-sectional view (see FIGS. 5 and 10) of the image reading apparatus 100 from the side closest to the locking portion F1 in the bottom view (see FIG. 4) of the image reading apparatus 100.

[0027] In a state where the document conveyance apparatus 200 is placed on the image reading apparatus 100, that is, in a state where the document conveyance apparatus 200 has not moved upward with respect to the image reading apparatus 100, the cylindrical member CY and the first cable CA are not pulled up. In this state, the lower end LE3 of the cylindrical member CY is positioned at a height between the bottom surface 101 and the lower end of the locking portion F1 in a longitudinal cross-sectional view. Therefore, the first cable CA1 is wired along the bottom surface 101 from below the lower end LE3 of the cylindrical member CY to the locking portion F1.

[0028] The first cable CA1 extends along the bottom surface 101 of the image reading device 100 from inside the document conveying device 200 through the first through hole TH1 of the cylindrical member CY. The first cable CA1 is a cable of an electrical wiring that electrically connects electronic components (not shown) in the document conveying device 200 and electronic components (not shown) in the image forming apparatus main body 300. As the electronic components in the document conveying device 200, the first cable CA1 and the second cable CA2 can be considered. The first cable CA1 is a cable that transmits an image signal connected to a document reading unit (CIS sensor) that reads the back surface of the document provided in the document conveying device 200. The second cable is a cable that transmits a drive signal and a drive voltage for driving a motor that conveys the document, and a signal and a drive voltage from a sensor that detects the conveyed document, etc.

[0029] When the document conveying device 200 moves upward with respect to the image reading device 100, the first cable CA1 is pulled up along the insertion hole IH together with the cylindrical portion CY and moves along the inclined surface IN (see FIG. 12). According to this, since the first wiring cable CA1 does not contact a right-angled corner and is not bent at a right angle, it is difficult to be damaged. Further, since the first cable CA1 does not have a bent portion that hangs down into the internal space of the image forming apparatus main body 300, the internal space of the image forming apparatus main body 300 can be effectively utilized. That is, according to the above configuration, the internal space of the image forming apparatus main body 300 can be efficiently utilized while reducing the risk of damage to the first cable CA1.

[0030] Note that the case where the document conveying device 200 moves upward with respect to the image reading device 100 is as follows. For example, when a thick document consisting of multiple pages such as a book is placed on the document placement table (glass) that constitutes the upper surface of the image reading device 100, the document conveying device 200 moves upward with respect to the image reading device 100. That is, the cylindrical member of the document conveying device 200 moves upward with respect to the insertion hole IH of the image reading device 100. In the above, the image forming apparatus 1000 in which the first cable CA1 and the cylindrical member CY move upward or downward by the document conveying device 200 moving upward or downward with respect to the image reading device 100 has been described. However, there is also an image forming apparatus 1000 in which the first cable CA1 and the cylindrical member CY move up, move to information, or move downward by the document conveying device 200 rotating about a certain rotation axis with respect to the image reading device 100. In this specification, both the image forming apparatus 1000 in which the document conveying device 200 moves upward or downward with respect to the image reading device 100, and the image forming apparatus 100 in which the document conveying device 200 rotates about a certain rotation axis with respect to the image reading device 100 are included in the image forming apparatus 1000 in which the document conveying device 200 moves upward with respect to the image reading device 100.

[0031] On the bottom surface 101 of the image reading device 100, a locking portion F1 for locking the first cable CA1 is provided. The locking portion F1 has a path hole F1th and a protrusion PR that penetrates the path hole F1th. The first cable CA1 extends so as to pass through the path hole F1th on one side of the protrusion PR, pass under the tip of the protrusion PR, and pass through the path hole F1th on the other side of the protrusion PR. The locking portion F1 locks the first cable CA1 so that the first cable CA1 is wired along the bottom surface 101.

[0032] According to this locking portion F1, it is possible to prevent the first wiring cable CA1 from hanging down into the space inside the image forming apparatus main body 300. Therefore, it is possible to suppress imposing restrictions on the use of the space inside the image forming apparatus main body 300.

[0033] Further, the inclined surface IN is provided between the cylindrical member CY and the locking portion F1 in a bottom view. Therefore, when the first wiring cable CA1 is pulled toward the document conveying device 200 side, the first cable CA1 can be moved so as to be wired along the inclined surface IN. As a result, the first cable CA1 contacts an obtuse-angled corner but does not contact a right-angled corner. Therefore, damage caused by bending of the first cable CA1 can be suppressed.

[0034] In a state where the document conveying device 200 is placed on the image reading device 100, that is, in a state where the document conveying device 200 has not moved upward with respect to the image reading device 100, the cylindrical member CY and the first cable CA are not pulled up. In this state, the upper end UE1 and the lower end LE1 of the inclined surface IN are positioned at a height between the upper end UE3 and the lower end LE3 of the cylindrical member CY. Therefore, since the inclined surface IN does not protrude into the internal space of the image forming apparatus main body 300, the utilization efficiency of the internal space of the image forming apparatus main body 300 is not reduced due to the provision of the inclined surface IN.

[0035] The inclined surface IN is inclined so as to approach the locking portion F1 from a position (position of reference numeral UE1 in FIG. 5) between the upper end (position of reference numeral UE2 in FIG. 5) and the lower end (position of reference numeral LE1 in FIG. 5) of the insertion hole IN to the bottom surface 101 of the image reading device 100. Specifically, the inclined surface IN extends obliquely downward from one side (position) closest to the locking portion F1 among the four sides having a rectangular shape of the insertion hole IH. Therefore, the first cable CA1 bends at an obtuse angle with the lower end LE1 of the inclined surface IN closest to the locking portion F1 of the insertion hole IH as the rotation center axis and approaches the inclined surface IN (see FIG. 12). The cross section of the insertion hole IH has a rectangular shape, and the upper end UE1 of the inclined surface IN extends obliquely downward from one side having a rectangular shape.

[0036] The image forming apparatus 1000 further includes a second cable CA2 (depicted by a dashed line) that extends along the bottom surface 101 of the image reading apparatus 100 via the second through-hole TH2 of the cylindrical member CY from inside the document conveying apparatus 200. The second cable CA extends vertically within the through-hole TH2 of the cylindrical member CY. When the document conveying apparatus 200 moves upward relative to the image reading apparatus 100, the second cable CA2 is pulled up along the insertion hole IH together with the cylindrical member CY and moves so as to extend along the inclined surface IN (see FIG. 12). The first cable CA1 and the second cable CA2 extend substantially parallel to each other from the cylindrical member CY via the inclined surface IN to the bottom surface 101 in a bottom view.

[0037] The bottom surface 101 of the image reading apparatus 100 has a locking portion F2 for locking the second cable CA2. The locking portion F2 locks the second cable CA2 so that the second cable CA2 is routed along the bottom surface 101. The locking portion F2 has a path hole F2th. The second cable CA2 extends so as to pass through the path hole F2th. The width of the path hole F2th is substantially the same as the width of the second cable CA2 or slightly smaller than the width of the second cable CA2. Therefore, due to the frictional force between the path hole F2th and the second cable CA2, the locking portion F2 suppresses the movement of the second cable CA2 so that it remains in place even when the second cable CA2 is pulled. The second cable CA2 is also a cable for electrical wiring that electrically connects electronic components (not shown) in the document conveying apparatus 200 and electronic components (not shown) in the image forming apparatus main body 300, similar to the first cable CA1.

[0038] According to this locking portion F2, it is possible to prevent the second wiring cable CA2 from hanging down into the space inside the image forming apparatus main body 300. Therefore, it is possible to suppress imposing restrictions on the use of the space inside the image forming apparatus main body 300. For example, it is possible to secure a space for providing an electronic circuit board 301 inside the image forming apparatus main body 300.

[0039] The inclined surface IN has a rib R that partitions the first inclined surface IN1 for the first cable CA1 and the second inclined surface IN2 for the second cable CA2. Therefore, electromagnetic interference between the first cable CA1 and the second cable CA2 on the inclined surface IN can be suppressed. Also, physical contact between the first cable CA1 and the second cable CA2 on the inclined surface IN is prevented.

[0040] The cylindrical member CY has a partition wall P that extends so as to partition the first through hole TH1 and the second through hole TH2 along the wiring direction in which the first cable CA1 and the second cable CA2 are wired. Therefore, electromagnetic interference between the first cable CA1 and the second cable CA2 within the cylindrical member CY can be suppressed. Also, physical contact between the first cable CA1 and the second cable CA2 within the cylindrical member CY is prevented.

[0041] The first cable CA1 is inserted into the first through hole TH1. The second cable CA2 is inserted into the second through hole TH. The first cable CA1 is a flat cable with a straight cross-section. Also, the second cable CA2 is a round cable with a circular cross-section. Therefore, a flat cable is inserted into the first through hole TH1. A round cable is inserted into the second through hole TH2.

[0042] The first through hole TH1 is provided at a position closer to the inclined surface IN than the second through hole TH2 in a bottom view. Therefore, the round cable can bend with a larger radius of curvature than the flat cable. As a result, damage to both the round cable, which preferably bends so as to have a larger radius of curvature, and the flat cable, which is less likely to be damaged even when bent with a smaller radius of curvature, can be effectively suppressed.

[0043] FIG. 9 and FIG. 10 are a partial cutaway perspective sectional view and a partial sectional view, respectively, showing the state immediately after the document conveying device 200 of the embodiment is installed in the image reading device 100.

[0044] As shown in FIGS. 9 and 10, when nothing is placed between the document conveying device 200 and the image reading device 100, the first cable CA1 and the cylindrical member CY are not pulled up. Also, when a thin document such as a sheet of paper is placed between the document conveying device 200 and the image reading device 100, the first cable CA1 and the cylindrical member CY are not pulled up.

[0045] As shown in FIGS. 9 and 10, in a state where the document conveying device 200 has not moved upward with respect to the image reading device 100, the cylindrical member CY and the first cable CA are not pulled up. In this state, the lower end LE3 of the cylindrical member CY is positioned below the upper end UE1 of the inclined surface IN. Therefore, it is possible to surely maintain a state in which the first cable CA1 does not contact the inclined surface IN.

[0046] Also, in a state where the document conveying device 200 has not moved upward with respect to the image reading device 100, the first cable CA1 extends along the cylindrical member CY to a height position lower than the height position of the lower end LE1 of the inclined surface IN without being wired along the inclined surface IN. According to this, the distance by which the first cable CA1 is pulled up can be increased as much as possible. Note that the case where the document conveying device 200 has not moved upward with respect to the image reading device 100 is as follows. For example, when a document that is not as thick as a single page, such as a book, instead of a thick document consisting of multiple pages, is placed on the document placement table (glass), the document conveying device 200 hardly moves upward with respect to the image reading device 100. On the other hand, when no document is placed on the document placement table (glass), the document conveying device 200 does not move upward at all or hardly moves upward with respect to the image reading device 100.

[0047] FIGS. 11 and 12 are a partial cutaway perspective sectional view and a partial sectional view, respectively, showing a state in which the document conveying device 200 of the embodiment has moved upward from the image reading device 100.

[0048] As shown in FIGS. 11 and 12, for example, when a thick document such as a book is placed between the document conveying device 200 and the image reading device 100, the document conveying device 200 moves upward with respect to the image reading device 100 as indicated by the white arrow. As a result, the first cable CA1 is pulled up. Thereby, a gap D is formed between the document conveying device 200 and the image reading device 100. At this time, since the first cable CA1 and the cylindrical member CY are integrated by the positioning portion PD, both are pulled up.

[0049] When the document conveying device 200 moves upward with respect to the image reading device 100, the first cable CA1 and the cylindrical member CY are pulled up. Thereby, the lower end LE3 of the cylindrical member CY moves to a height position that is higher than the upper end UE1 of the inclined surface IN and lower than the upper end UE2 of the insertion hole IH.

[0050] Further, the first cable CA1 of the present embodiment moves so as to extend along the inclined surface IN. That is, the first cable CA1 approaches the inclined surface IN as indicated by the black arrow so as to bend at an obtuse angle with the lower end LE1 of the inclined surface IN closest to the locking portion F1 of the insertion hole IH as the rotation center axis. As a result, even though the first cable CA1 may bend along the obtuse corner portion that is the boundary between the bottom surface 101 and the inclined surface IN, it does not bend at a right angle. Therefore, damage to the first cable CA1 is suppressed. The same applies to the second cable CA2.

Explanation of Signs

[0051] 100 Image reading device 101 Bottom surface 200 Document conveying device 1000 Image forming device CA1 First cable (cable) CA2 Second cable (other cable) CY Cylindrical member F1 Locking portion IN Inclined surface IN1 First inclined surface IN2 Second inclined surface Lower ends of LE1 and LE3 Partition wall P Rib R Insertion hole IH First through-hole TH1 Second through-hole TH2 Upper ends of UE1, UE2, and UE3

Claims

1. An image reading device, and a document conveying device provided above the image reading device, wherein a cylindrical member having a through hole is attached to the document conveying device, the image reading device has an insertion hole penetrating in the vertical direction so that the cylindrical member is inserted therein, the document conveying device is movable in the vertical direction with respect to the image reading device by moving the cylindrical member in the vertical direction along the insertion hole, a lower end portion of the insertion hole has an inclined surface that separates from the cylindrical member as it goes downward, further comprising a cable that is routed along the bottom surface of the image reading device via the through hole from inside the document conveying device, when the document conveying device moves upward with respect to the image reading device, the cylindrical member and the cable are pulled up along the through hole, and the cable moves along the inclined surface, an image forming apparatus.

2. A locking portion for locking the cable along the bottom surface is provided on the bottom surface of the image reading device, The image forming apparatus according to claim 1.

3. The inclined surface is provided between the cylindrical member and the locking portion in a bottom view, The image forming apparatus according to claim 2.

4. when the document conveying device has not moved upward with respect to the image reading device, the cable and the cylindrical member are not pulled up along the through hole, and an upper end of the inclined surface is positioned at a height between an upper end and a lower end of the cylindrical member in a longitudinal sectional view, The image forming apparatus according to claim 1.

5. when the document conveying device has not moved upward with respect to the image reading device, the cable and the cylindrical member are not pulled up along the through hole, and a lower end of the cylindrical member is positioned below an upper end of the inclined surface, The image forming apparatus according to claim 1.

6. when the document conveying device moves upward with respect to the image reading device, the cable and the cylindrical member are pulled up along the through hole, so that a lower end of the cylindrical member moves to a height position above an upper end of the inclined surface and below an upper end of the through hole, The image forming apparatus according to claim 5.

7. When the original document conveying device has not moved upward relative to the image reading device, the cable and the cylindrical member are not pulled up along the through hole, and the cable is routed along the cylindrical member to a height position lower than the height position of the lower end of the inclined surface without being routed along the inclined surface. The image forming apparatus according to claim 1.

8. The inclined surface is inclined so as to approach the locking portion from a position between the upper end and the lower end of the insertion hole to the bottom surface of the image reading device. The image forming apparatus according to claim 2.

9. It further includes another cable routed from inside the original document conveying device along the bottom surface of the image reading device via the through hole of the cylindrical member. When the original document conveying device moves upward relative to the image reading device, the cylindrical member and the other cable are pulled up along the through hole, and the other cable moves so as to be routed along the inclined surface. The inclined surface has a rib that partitions a first inclined surface for the cable and a second inclined surface for the other cable. The image forming apparatus according to claim 1.

10. The cylindrical member has a partition wall that extends to partition the through hole into a first through hole and a second through hole along the wiring direction in which the cable is routed in the through hole. The image forming apparatus according to claim 1.

11. The cable is a flat cable. The other cable is a round cable. The flat cable is inserted into the first through hole. The round cable is inserted into the second through hole. The first through hole is provided at a position closer to the inclined surface than the second through hole. The image forming apparatus according to claim 10.

12. An image reading device having an insertion hole that penetrates in the vertical direction and is attached to the original document conveying device and into which a cylindrical member having a through hole can be inserted, and the original document conveying device can be attached so as to be movable in the vertical direction along the insertion hole. The lower end portion of the insertion hole has an inclined surface that moves away from the cylindrical member as it goes downward. When the original document conveying device moves upward relative to the image reading device, the cable routed from inside the cylindrical member and the original document conveying device along the bottom surface of the image reading device via the through hole is pulled up along the through hole and moves so as to be routed along the inclined surface.

Images