Sheet supply device or image reading device

Abstract

To provide a sheet feeder having a downsizable regulation guide.SOLUTION: A sheet feeder of the present invention is provided with: a tray on which a sheet is placed; a regulation guide disposed on the tray and regulating a side end in a width direction of the sheet upon transportation of the sheet in a transportation direction; a support body moving in the width direction with the regulation guide and having a first tooth part; and a rotation body having a second tooth part engaging with the first tooth part of the support body and rotating through movement of the support body. The second tooth part shifts with respect to the rotation body in accordance with a position of the regulation guide.SELECTED DRAWING: Figure 8

Description

Technical Field

[0001] The present invention relates to a sheet feeding apparatus that feeds placed sheets, or an image reading apparatus provided with the sheet feeding apparatus. Background Art

[0002] A sheet feeding apparatus that feeds sheets placed on a placement section to a conveyance path, and an image reading apparatus including the sheet feeding apparatus are provided with a regulation guide that regulates the width direction of the sheets. The regulation guide can be moved by a rack section movable in a direction intersecting the sheet conveyance direction, and a pinion gear that meshes with rack teeth of the rack section. In Patent Document 1, a pressing means is provided on the rack section, and the rack section is pressed by the pressing means in a direction to mesh with the pinion gear. As a result, backlash occurring between the rack section and the pinion gear can be prevented, and the regulation guide can be reliably positioned at a predetermined position corresponding to the size of the sheet. Prior Art Literature Patent Literature

[0003] Patent Document 1 Japanese Patent Laid-Open No. 2010-37031 Summary of the Invention Problem to be Solved by the Invention

[0004] However, in the configuration of Patent Document 1, a plurality of rack arms and a plurality of pressing means are respectively arranged on one rack, resulting in a complicated structure. In addition, size reduction becomes difficult due to the use of a plurality of components. As described above, there is room for improvement in the regulation guide. An object of the present invention is to provide a sheet feeding apparatus having a regulation guide that can be reduced in size. Means for Solving the Problem

[0005] The sheet supply device of the present invention comprises: a tray on which sheets are placed; a regulating guide disposed on the tray and restricting the side edges of the sheets in the width direction when the sheets are transported in the transport direction; a support that moves in the width direction together with the regulating guide and has first teeth; and a rotating body that has second teeth that mesh with the first teeth of the support and rotates as the support moves, wherein the second teeth are displaced relative to the rotating body according to the position of the regulating guide. [Effects of the Invention]

[0006] According to the present invention, a sheet feeding device having a regulating guide that can be miniaturized can be provided. [Brief explanation of the drawing]

[0007] [Figure 1] This is an overall diagram of the image reading device. [Figure 2] This is an overall diagram showing the sheet transport section of the image reading device when opened. [Figure 3] This is a perspective view of a flatbed type reader. [Figure 4] This is a cross-sectional view of the sheet transport section. [Figure 5] This is a perspective view of the seat mounting area. [Figure 6] This is a breakdown perspective of the regulatory guidelines. [Figure 7] This is a diagram showing the information section provided in the regulatory guide. [Figure 8] This diagram shows the meshing state between the guide and the pinion gear. [Figure 9] This diagram shows the components of the regulatory guide and pinion gear. [Figure 10] This diagram shows the relationship between the regulating guide and the pinion gear when the regulating guide is in the first position. [Figure 11] This diagram shows the relationship between the regulating guide and the pinion gear when the regulating guide is in the second position. [Figure 12]This diagram shows the relationship between the regulating guide and the pinion gear when the regulating guide is in the third position. [Figure 13] This is an overall perspective view with the regulatory guide in the first position. [Figure 14] This is an overall perspective view with the regulatory guide in the second position. [Figure 15] This is an overall perspective view when the regulatory guide is in the third position. [Figure 16] This is a front view of the pinion gear of the second embodiment. [Figure 17] This is a perspective view of the seat width regulating means of the third embodiment. [Modes for carrying out the invention]

[0008] Embodiments of the present invention will be described below with reference to the drawings. However, the dimensions, materials, shapes, and relative arrangements of the components described in the embodiments may be appropriately changed depending on the configuration of the device to which the invention is applied and various conditions, and this is not intended to limit the scope of the invention to the following embodiments.

[0009] [First Embodiment] <Image reading device> The image reading device of this embodiment will be described with reference to Figures 1 to 4. Figure 1 is an overall configuration diagram of the image reading device. Figure 2 is an overall configuration diagram of the image reading device when the sheet transport section is opened. Figure 3 is a perspective view of the flatbed type reading section. Figure 4 is a cross-sectional view of the sheet transport section 100. Hereinafter, X is the width direction of the image reading device 1, Y is the depth direction, and Z is the height direction. In this embodiment, the case in which it is applied to a sheet supply device of an image reading device with a recording section will be described. However, it can also be applied to other forms such as a sheet supply device of an image reading device without a recording section, or a sheet supply device of a recording device without a reading section.

[0010] An image reading apparatus 1 includes a flatbed-type reading unit 200, a sheet conveying unit 100, and an inkjet-type recording unit 3. The sheet conveying unit 100 (ADF: Auto Document Feeder) is disposed above the flatbed-type reading unit 200. The sheet conveying unit 100 is openably and closably engaged by hinges 115a and 115b on the back side of the image reading apparatus 1. The reading unit 200 can read an image of a sheet conveyed by the sheet conveying unit 100 or an image of a sheet placed on a transparent member 202. The recording unit 3 can record an image from an external PC or an image read by the reading unit 200 onto a sheet.

[0011] The flatbed-type reading unit 200 has a reading unit 203 including a line sensor capable of reading an image of a sheet. By scanning the reading unit 203 in a sub-scanning direction (direction of arrow B) perpendicular to the main scanning direction (direction of arrow A) of the line sensor, an image of a sheet placed on the transparent member 202 can be read. The reading unit 203 uses a unity-magnification optical system and is called a contact image sensor (CIS). The reading unit 203 can move in the sub-scanning direction along guide rails 206 by transmitting driving force to a rack 205 from a drive unit equipped with a driving device.

[0012] The sheet conveying section 100 is capable of conveying a sheet having an image recorded thereon to the ADF transparent member 201. The conveyed sheet is read by a reading unit 203 located directly below the ADF transparent member 201. In the sheet conveying section 100, driving force from a driving device is transmitted to a pickup roller 101, a separation roller 102, a conveying roller 104, and a discharge roller 106. The pickup roller 101 and the separation roller 102 are disposed on a base 118. In the present embodiment, the sheet conveying section 100 is configured to include a sheet feeding device. The sheet feeding device includes a feeding tray 116, regulation guides (411, 421), the pickup roller 101, and the separation roller 102. In the case of a recording apparatus, the sheet conveying section conveys a sheet for recording an image to a recording section. In this case, the sheet feeding device similarly includes a feeding tray, a regulation guide, a pickup roller, and a separation roller.

[0013] The sheet G placed on the feeding tray 116 is preliminarily separated by the pickup roller 101 and conveyed to the separation roller 102. Here, a direction in which the sheet G is conveyed is defined as a conveying direction, and a direction intersecting the conveying direction is defined as a width direction. The separation roller 102 separates the sheets G one by one between itself and a separation pad 103, and feeds the separated sheet G to the conveying roller 104. The sheet G is nipped between the conveying roller 104 and a driven conveying roller 105, and is conveyed to the ADF transparent member 201 by rotation of the conveying roller 104. The sheet G is brought into close contact with the ADF transparent member 201 by a spring-biased white plate 108, and is read by the reading unit 203. Thereafter, the sheet G is nipped between the discharge roller 106 and a driven discharge roller 107, and is discharged onto a discharge tray 117 by rotation of the discharge roller 106.

[0014] <Sheet placing section> Next, the sheet placement section will be described. Figure 5 shows the configuration of the sheet placement section. (a) is a top view, and (b) is a rear view. The sheet placement section includes a supply tray 116, a pair of regulating guides (411, 421), and a pinion gear 431. The side edges of the sheet placed on the supply tray 116 in the width direction are each regulated by the pair of regulating guides (411, 421). The regulating guides (411, 421) can move in the width direction of the sheet along guides (116a, 116b) provided on the supply tray 116. When the user moves either regulating guide 411 or regulating guide 421, the pinion gear 431 rotates, causing the other regulating guide to move in conjunction. Note that in this description, one of the regulating guides 411 or 421 may be omitted. In this embodiment, the center of the sheet in the width direction is aligned with the reference in the width direction of the supply tray 116.

[0015] Figure 6 is an exploded perspective view of the regulating guide. The pinion gear 431 is rotatably held by a screw 441 in a screw receiver provided on the supply tray 116. As a result, the pinion gear 431 rotates with its movement restricted in the Z and XY directions. The regulating guides (411, 421) are guided in the width direction by guides (116a, 116b) provided on the supply tray 116. The regulating guide 411 includes a regulating portion 411a that restricts the width direction of the sheet, a tooth portion 415, and a support 411b that supports the tooth portion 415. Similarly, the regulating guide 421 includes a regulating portion 421a, a tooth portion 425, and a support 421b. The tooth portions 415 and 425 correspond to the rack portion. The rack portion may also include support 421b and support 422b. The teeth 415 and 425 face each other in the transport direction and mesh with the pinion gear 431 positioned between them. The support 411b of the restricting guide 411 is located between the pinion gear 431 and the separation restricting section 116d, restricting the movement of the sheet in the transport direction. On the other hand, the support 421b of the restricting guide 421 is located between the pinion gear 431 and the separation restricting section 116c, restricting its movement in the transport direction.

[0016] Figure 7 shows the guide portion provided on the regulating guide. Figure 7(a) is a cross-sectional view taken along line C-C in Figure 6, and Figure 7(b) is a cross-sectional view taken along line D-D in Figure 6. The regulating guide 411 has a cylindrical protrusion 414. On the other hand, the supply tray 116 has a concave guide portion 116a that extends in the width direction. The protrusion 414 can move in the width direction of the sheet while its movement in the transport direction is restricted by the guide portion 116a. Similarly, the regulating guide 421 has a cylindrical protrusion 424. On the other hand, the supply tray 116 has a concave guide portion 116b that extends in the width direction. The protrusion 424 can move in the width direction of the sheet by the guide portion 116b.

[0017] Figure 8 shows the meshing state of the regulating guide and the pinion gear. Figure 8(b) is an enlarged view of region V in Figure 8(a). The teeth 435a of the pinion gear 431 mesh with the teeth 415 of the regulating guide 411, and the teeth 435b of the pinion gear 431 mesh with the teeth 425 of the regulating guide 421. When either the regulating guide 411 or the regulating guide 421 moves, the pinion gear 431 rotates, causing the other regulating guide to move. Depending on the position of the regulating guide 411 or the regulating guide 421, at least one of the elastic parts (432a, 432b) of the pinion gear 431 or the elastic shape (412, 422) of the regulating guide is displaced. As a result, the regulating guide 411 is biased toward the separation regulating part 116c regardless of its position, and the regulating guide 421 is biased toward the separation regulating part 116d regardless of its position.

[0018] Figure 9 shows the components of the regulating guide and pinion gear. Figure 9(a) is a rear view of the pinion gear, (b) is a rear view of the regulating guide, and (c) is an enlarged view of the teeth of the regulating guide. The pinion gear 431 has a toothed portion 435 formed by multiple teeth around a rotating body 436. The toothed portion 435 consists of a curved toothed portion 435a (curved toothed portion) with a curved shape from 0 to 180 degrees clockwise in Figure 9, and a curved toothed portion 435b (curved toothed portion) with a curved shape from 180 to 360 degrees. The toothed portions 435a and 435b are point-symmetric with respect to the rotation axis of the rotating body 436. The toothed portions 435a and 435b each include elastic portions (432a, 432b) and non-elastic portions (433a, 433b), respectively. The inelastic portions (433a, 433b) of the teeth (435a, 435b) are fixed ends that are fixed to the rotating body, while the tips of the elastic portions (432a, 432b) are free ends that are not fixed to the rotating body. In other words, the teeth (435a, 435b) of the pinion gear 431 are cantilevered. Therefore, a gap C3 is provided between the elastic portions (432a, 432b) and the rotating body 436. When the elastic portion 432a is pushed toward the rotating body 436, the elastic portion 432a elastically deforms within the range of the gap C3 toward the rotation axis of the pinion gear from the tooth tip diameter D3. Similarly, when the elastic portion 432b is pushed toward the rotating body 436, the elastic portion 432b elastically deforms within the range of the gap C3 toward the rotation axis of the pinion gear from the tooth tip diameter D3.

[0019] The regulating guide 411 has a linear tooth portion 415 (linear tooth portion), which includes an elastic shape 412 and an inelastic shape 413. Similarly, the regulating guide 421 has a linear tooth portion 425 (linear tooth portion), which includes an elastic shape 422 and an inelastic shape 423. The distance between the tooth roots of the regulating guides 411 and 421 is L12. The teeth portions (415, 425) of the regulating guides (411, 421) have fixed ends where the inelastic portion (413, 423) is fixed to the support (411b, 421b), and the tip of the elastic shape (412, 422) is a free end not fixed to the support (411b, 421b). In other words, the teeth portions (415, 425) of the regulating guides (411, 421) are cantilevered. Therefore, a gap C1 is provided between the support 411b and the elastic shape 412 of the regulatory guide 411. Similarly, a gap C2 is provided between the support 421b and the elastic shape 422 of the regulatory guide 421.

[0020] When elastic shape 412 is pressed against support 411b, the tooth root of elastic shape 412 elastically deforms toward support 411b within the range of gap C1. Similarly, when elastic shape 422 is pressed against support 421b, the tooth root of elastic shape 422 elastically deforms toward support 421b within the range of gap C2. Therefore, the distance L12 between the tooth roots of elastic shape 412 and elastic shape 422 widens. The tip circle diameter D3 of pinion gear 431 is greater than the distance L12 between the tooth roots of tooth portion 415 and tooth portion 425. Also, the sum of gaps C1 and C3 is greater than (D3-L12) / 2, and the sum of gaps C2 and C3 is greater than (D3-L12) / 2. Therefore, the elastic portion 432a of pinion gear 431 and the elastic shape 412 of regulating guide 415 can collectively elastically deform within the range of (D3-L12) / 2. Similarly, the elastic portion 432b of the pinion gear 431 and the elastic shape 422 of the regulating guide 425 can elastically deform together within the range of (D3-L12) / 2.

[0021] Furthermore, the teeth (415, 425) of the regulating guides (411, 421) may not have an elastic shape and may be fixed to the support (411b, 421b). Even in this case, since the pinion gear 431 has an elastic part 432, the regulating guides can be miniaturized.

[0022] <The function of the regulatory guide and pinion gear> The operation of the regulating guide and pinion gear in this embodiment will be explained using Figures 10 to 16. The relationship between the regulating guide and pinion gear when the regulating guide is in the first, second, and third positions is shown in Figures 10, 11, and 12, respectively. Overall perspective views when the regulating guide is in the first, second, and third positions are shown in Figures 13, 14, and 15, respectively. In the first position, the distance in the width direction between the regulating parts 411a and 421a corresponds to the largest size sheet. In the second position, the distance in the width direction between the regulating parts 411a and 421a corresponds to the smallest size sheet. In the third position, the distance in the width direction between the regulating parts 411a and 421a corresponds to a medium size sheet.

[0023] As shown in Figures 10 and 13, the first position is when the side edges of the largest size sheet G placed on the supply tray 116 are restricted by the restricting guides 411 and 421, respectively. The distance between the restricting parts 411a and 421a in the first position is close to the maximum possible distance. At this time, the elastic part 432b of the pinion gear 431 and the inelastic shape 423 of the restricting guide 421 engage, and the elastic part 432a of the pinion gear 431 and the inelastic shape 413 of the restricting guide 411 engage, respectively. In the conveying direction, the inelastic shape 413 of the restricting guide 411 is positioned opposite the inelastic shape 423 of the restricting guide 421, with the pinion gear 431 in between. The elastic part 432b is displaced in the direction of the rotation axis, 432d, and the elastic part 432a is displaced in the direction of the rotation axis, 432e. Therefore, the elastic portion 432b presses against the regulating guide 421 via the teeth portion 425, and the elastic portion 432a presses against the regulating guide 411 via the teeth portion 415.

[0024] As shown in Figures 11 and 14, the second position is when the side edges of the smallest size sheet G placed on the supply tray 116 are restricted by the restricting guides 411 and 421, respectively. The distance between the restricting parts 411a and 421a in the second position is close to the minimum possible distance. At this time, the inelastic part 433b of the pinion gear 431 engages with the elastic shape 422 of the restricting guide 421, and the inelastic part 433a of the pinion gear 431 engages with the elastic shape 412 of the restricting guide 411. In the conveying direction, the tip of the elastic shape 412 of the restricting guide 411 is positioned opposite the tip of the elastic shape 422 of the restricting guide 421, with the pinion gear 431 in between. The elastic shape 422 is displaced in the direction of the separation restricting part 116d, which is the 422d direction, and the elastic shape 412 is displaced in the direction of the separation restricting part 116c, which is the 412d direction. Therefore, the inelastic portion 433b presses against the regulating guide 421 via the teeth portion 425, and the inelastic portion 433a presses against the regulating guide 411 via the teeth portion 415.

[0025] As shown in Figures 12 and 15, the third position is when the side edges of a medium-sized sheet G placed on the supply tray 116 are restricted by the restricting guides 411 and 421, respectively. The distance between the restricting parts 411a and 421a is smaller in the width direction of the sheet than in the first position and larger than in the second position. In this case, the elastic part 432a of the pinion gear 431 engages with the elastic shape 412 of the restricting guide 411, and the elastic part 432b of the pinion gear 431 engages with the elastic shape 422 of the restricting guide 421. The elastic shape 412 is displaced in the 412d direction, and the elastic shape 422 is displaced in the 422d direction. On the other hand, the elastic part 432b is displaced in the 432d direction, and the elastic part 432a is displaced in the 432e direction. The non-elastic shapes 413 and 423 do not engage with the elastic parts 432a and 432b, respectively. As a result, the elastic portion 432a presses against the elastic shape 412, and the elastic portion 432b presses against the elastic shape 422. That is, the elastic portion 432b presses against the regulating guide 421 via the teeth portion 425, and the elastic portion 432a presses against the regulating guide 411 via the teeth portion 415.

[0026] The positions of the restrictor guides 411 and 421 can be moved by the user, as shown in Figures 10 to 12. The restrictor guides 411 and 421 move in conjunction with each other via the pinion gear 321. Here, we will explain the case where the restrictor guide 411 moves from the first position to the second position. The reverse operation occurs when moving from the second position to the first position. Note that the movement of the restrictor guide 421 also moves when the restrictor guide 411 moves, so the explanation is omitted.

[0027] When the restrictor guide 411 is in the first position, the elastic portion 432a of the pinion gear 431 engages with the inelastic shape 413 at its tip (Figure 10(b)). As the restrictor guide 411 moves from the first position to the third position, the pinion gear 431 rotates. Accordingly, the engagement point of the pinion gear 431 moves from the tip of the elastic portion 432a towards the center. On the other hand, the engagement point of the restrictor guide 411 moves from the inelastic shape 413 towards the base of the elastic shape 412.

[0028] When the restrictor guide 411 reaches the third position, the central part of the elastic portion 432a of the pinion gear 431 and the base of the elastic shape 412 engage with each other (Figure 12(b)). As the restrictor guide 411 moves from the third position to the second position, the pinion gear 431 rotates along with the movement of the restrictor guide 411. The engagement point of the pinion gear 431 moves from the central part of the elastic portion 432a towards the inelastic portion 433a. Meanwhile, the engagement point of the restrictor guide 411 moves from the base of the elastic shape 412 towards the tip. In the second position, the inelastic portion 433a of the pinion gear 431 engages with the tip of the elastic shape 412 (Figure 11(b)).

[0029] The tip circle diameter D3 of the pinion gear 431 is greater than the distance L12 between the roots of teeth 415 and 425. On the other hand, as the regulating guide moves from the first position to the second position, the displacement of the elastic parts (432a, 432b) of the pinion gear 431 gradually decreases. If the regulating guide does not have an elastic shape, the pressing force by the elastic parts (432a, 432b) gradually increases. Conversely, the displacement of the elastic shapes (412, 422) increases. If the pinion gear does not have an elastic shape, the pressing force by the regulating guides (411, 421) gradually decreases. In this embodiment, the sum of the displacements of the elastic parts of the pinion gear 431 and the elastic shapes of the regulating guide does not fluctuate significantly. Therefore, the positional variation in the width direction of the pressing force that presses the regulating guide 411 against the separation regulating part 116c and the pressing force that presses the regulating guide 421 against the separation regulating part 116d is reduced. Therefore, the force required by the user to operate the regulatory guide can be made nearly uniform regardless of the guide's position.

[0030] Furthermore, the relationship between the fixed end and free end of the elastic shape of the regulating guide and the relationship between the fixed end and free end of the elastic part of the pinion gear may be changed. In this case, for example, when the regulating guide moves from the second position to the first position, the displacement of the elastic part of the pinion gear can be gradually reduced, and the displacement of the elastic shape can be increased.

[0031] As described above, by displacing at least one of the elastic portion of the pinion gear and the elastic shape of the regulating guide, backlash between the pinion gear and the regulating guide can be prevented. Furthermore, the regulating guide can be reliably positioned in a predetermined location according to the seat width. In addition, the regulating guide can be made smaller.

[0032] [Second Embodiment] Figure 16 shows a pinion gear 431 in a second embodiment. In Figure 16(a), the inelastic portion 433 of the pinion gear 431 is located in the central part between the elastic portion 432c and the elastic portion 432d of the pinion gear 431. This configuration increases the elastic deformation at the end of the elastic portion 432. In Figure 16(b), the elastic portion 432 and the inelastic portion 433 of the pinion gear 431 are connected in the circumferential direction of the pinion gear 431. As a result, the inelastic portion 433 does not undergo elastic deformation, and the elastic deformation at the central part of the elastic portion 432 is increased.

[0033] [Third Embodiment] Figure 17 shows the sheet mounting section in the third embodiment. In the first embodiment, a pair of restrictor guides moved in conjunction with each other, but in the third embodiment, one restrictor guide moves and the other is a fixed restrictor guide. The pinion gear 431 meshes with the moving restrictor guide 411. In this case, the fixed restrictor guide is the reference position for the sheet. The moving restrictor guide is the same as the restrictor guide 411 in the first embodiment. For the largest size sheet G, the elastic portion 432a of the pinion gear 431 and the inelastic shape 413 of the restrictor guide 411 mesh with each other. For the smallest size sheet G, the inelastic portion 433a of the pinion gear 431 meshes with the elastic shape 412 of the restrictor guide 411.

[0034] As the regulating guide moves from the first position to the second position, the displacement of the elastic portion 432a of the pinion gear 431 gradually decreases. If the regulating guide lacks an elastic shape, the pressing force from the elastic portion 432a gradually increases. On the other hand, the displacement of the elastic shape 412 gradually increases. If the pinion gear lacks an elastic part, the pressing force from the regulating guide 411 gradually increases. As a result, the operating force required by the user to operate the regulating guide can be made substantially uniform regardless of the position of the regulating guide.

[0035] As described above, by displacing at least one of the elastic portion of the pinion gear and the elastic shape of the regulating guide, backlash between the pinion gear 431 and the regulating guide 411 can be prevented. Furthermore, the regulating guide can be reliably positioned at a predetermined location according to the seat width. In addition, the regulating guide can be made smaller. [Explanation of symbols]

[0036] 116 Supply Tray 411, 421 Regulatory Guide 412, 422 Elastic shape 413, 423 Inelastic Shape 431 Pinion Gear 432 Elastic part 433 Inelastic part

Claims

1. A tray for placing the sheet, The tray includes a restricting guide that restricts the side edges of the sheet in the width direction when the sheet is transported in the transport direction, Moves in the width direction together with the aforementioned regulating guide, and a support having a first tooth portion, A sheet supply device comprising a rotating body having a second tooth portion that meshes with the first tooth portion of the support, and which rotates as the support moves, The sheet supply device is characterized in that the second tooth portion is displaced relative to the rotating body according to the position of the regulating guide.

2. The sheet feeding device according to claim 1, characterized in that the regulating guide moves from a first position to a second position, and the second teeth are displaced more significantly at the first position than at the second position.

3. The sheet supply device according to claim 2, characterized in that the displacement of the second tooth portion decreases as the regulating guide moves from the first position to the second position.

4. The sheet supply device according to claim 1, characterized in that the first tooth portion is displaced relative to the support in accordance with the position of the regulating guide.

5. The sheet feeding device according to claim 1, characterized in that the regulating guide moves from a first position to a second position, and the first teeth are displaced more significantly at the second position than at the first position.

6. The sheet supply device according to claim 5, characterized in that the displacement of the first tooth increases as the regulating guide moves from the first position to the second position.

7. The sheet supply device according to claim 1, characterized in that the second tooth portion has a curved shape having a fixed end fixed to the rotating body and a free end not fixed to the rotating body.

8. The sheet supply device according to claim 1, characterized in that the first tooth portion has a linear shape having a fixed end fixed to the support and a free end not fixed to the support.

9. The sheet supply device according to claim 1, characterized in that the tray has a guide portion for guiding the support in the width direction.

10. The sheet supply device according to claim 1, characterized in that the tray has a restricting portion that restricts the movement of the support in the transport direction.

11. The support is composed of a first support having a first linear tooth portion having a linear shape and a second support having a second linear tooth portion. The sheet feeding device according to claim 1, characterized in that the rotating body has a first curved tooth portion which has a curved shape that meshes with the first straight tooth portion and a second curved tooth portion which has a curved shape that meshes with the second straight tooth portion.

12. The sheet supply device according to claim 11, characterized in that the second support moves when the first support is moved.

13. The sheet feeding device according to claim 11, characterized in that the first curved tooth portion and the second curved tooth portion are point-symmetric with respect to the rotation axis of the rotating body.

14. The sheet feeding device according to claim 11, characterized in that the first curved tooth portion has a curved shape having a fixed end fixed to the rotating body and a free end not fixed to the rotating body, and the second curved tooth portion has a curved shape having a fixed end fixed to the rotating body and a free end not fixed to the rotating body.

15. A sheet supply device according to any one of claims 1 to 14, An image reading device comprising: a reading unit for reading an image of a sheet supplied from the sheet supply device.

16. A sheet supply device according to any one of claims 1 to 14, A recording device comprising: a recording unit that records an image on a sheet supplied from the aforementioned sheet supply device.

Images