Sheet supporting device and sheet conveying device

1. A sheet supporting device, comprising:

a sheet supporter having a support surface for supporting a sheet to be conveyed downstream in a conveyance direction;

a guide disposed on one of opposite sides of the sheet supporter on which the support surface is provided and configured to be movable along the support surface in a width direction of the sheet orthogonal to the conveyance direction, the guide having a guide surface configured to come into contact with an edge, in the width direction, of the sheet supported on the sheet supporter; and

a slider disposed on the other of the opposite sides of the sheet supporter so as to be movable in the width direction of the sheet,

wherein the sheet supporter is provided with an elongate opening penetrating the support surface and extending in the width direction of the sheet,

wherein the guide and the slider are coupled to each other through the elongate opening, such that the guide and the slider are movable together in the width direction of the sheet,

wherein the guide includes a first hook hooked on a portion of the sheet supporter at a position spaced downstream of the elongate opening in the conveyance direction, the first hook being configured to be movable in the width direction of the sheet along the portion of the sheet supporter,

wherein the guide and the slider are coupled to each other upstream of a central portion of the guide in the conveyance direction, and

wherein the first hook is hooked on the sheet supporter downstream of the central portion of the guide in the conveyance direction.

2. The sheet supporting device according to claim 1 ,

wherein the first hook includes: a base portion protruding from a facing surface of the guide that faces the support surface of the sheet supporter, in a direction intersecting the facing surface; and a hook portion that is bent from a distal end of the base portion so as to reach a position at which the hook portion is to come into contact with another surface of the sheet supporter opposite to the support surface, and

wherein the guide is provided with a through-hole penetrating the guide in the same direction as the direction in which the base portion protrudes, the hook portion being formed so as to overlap the through-hole as viewed from a direction of penetration of the through-hole.

3. The sheet supporting device according to claim 1 , wherein the first hook is hooked on a downstream edge of the sheet supporter in the conveyance direction.

4. The sheet supporting device according to claim 1 , wherein the guide includes a first coupling portion and the slider includes a second coupling portion, the first coupling portion and the second coupling portion being coupled to each other through the elongate opening so as to couple the guide and the slider to each other.

5. The sheet supporting device according to claim 4 ,

wherein one of the first coupling portion and the second coupling portion includes an engaging portion while the other of the first coupling portion and the second coupling portion includes an engaged portion,

wherein one of the first coupling portion and the second coupling portion includes a fitting portion while the other of the first coupling portion and the second coupling portion includes a fitted portion, and

wherein, when the guide and the slider are coupled to each other, the fitting portion is fitted into the fitted portion, so that the guide and the slider are prohibited from moving relative to each other in directions other than a direction in which the fitting portion is pulled out from the fitted portion, and

wherein, when the guide and the slider are coupled to each other, the engaging portion and the engaged portion are brought into engagement with each other such that at least one of the engaging portion and the engaged portion is elastically deformed in a direction different from the direction in which the fitting portion is pulled out from the fitted portion, so that the guide and the slider are prohibited from moving relative to each other in the direction in which the fitting portion is pulled out from the fitted portion.

6. The sheet supporting device according to claim 1 , wherein the guide includes a second hook hooked on the sheet supporter, the guide being configured to be temporarily mountable on the sheet supporter by hooking the second hook on the sheet supporter even in a state in which the guide is not yet coupled with the slider.

7. The sheet supporting device according to claim 1 , comprising two guides each as the guide and two sliders each as the slider,

wherein the two guides are located such that the guide surfaces of the respective two guides are opposed to each other,

wherein each of the two sliders includes a rack,

wherein a pinion gear is mounted on the sheet supporter so as to mesh with the racks of the two sliders, and

wherein, when one of the two guides and one of the two sliders are moved in the width direction of the sheet, the rack of the one of the two sliders causes the pinion gear to rotate and the pinion gear causes the rack of the other of the two sliders to move, so that the other of the two guides and the other of the two sliders are moved in a direction opposite to a direction in which the one of the two guides and the one of the two sliders are moved, allowing the guide surfaces of the two guides to move toward and away from each other.

8. The sheet supporting device according to claim 1 , wherein a coupled position at which the guide and the slider are coupled, the first hook, and a downstream edge of the guide in the conveyance direction are arranged in this order from an upstream side toward a downstream side in the conveyance direction.

9. A sheet supporting device, comprising:

a sheet supporter having a support surface for supporting a sheet to be conveyed downstream in a conveyance direction;

a guide disposed on one of opposite sides of the sheet supporter on which the support surface is provided and configured to be movable along the support surface in a width direction of the sheet orthogonal to the conveyance direction, the guide having a guide surface configured to come into contact with an edge, in the width direction, of the sheet supported on the sheet supporter; and

a slider disposed on the other of the opposite sides of the sheet supporter so as to be movable in the width direction of the sheet,

wherein the sheet supporter is provided with an elongate opening penetrating the support surface and extending in the width direction of the sheet,

wherein the guide and the slider are coupled to each other through the elongate opening, such that the guide and the slider are movable together in the width direction of the sheet,

wherein the guide includes a first hook hooked on a portion of the sheet supporter at a position spaced downstream of the elongate opening in the conveyance direction, the first hook being configured to be movable in the width direction of the sheet along the portion of the sheet supporter, and

wherein the guide includes two first contact portions one of which is provided at one of two positions of the guide between which the first hook is interposed in the width direction of the sheet, and the other of which is provided at the other of the two positions, the two first contact portions being in contact with the support surface of the sheet supporter.

10. A sheet supporting device, comprising:

a sheet supporter having a support surface for supporting a sheet to be conveyed downstream in a conveyance direction;

a guide disposed on one of opposite sides of the sheet supporter on which the support surface is provided and configured to be movable along the support surface in a width direction of the sheet orthogonal to the conveyance direction, the guide having a guide surface configured to come into contact with an edge, in the width direction, of the sheet supported on the sheet supporter; and

a slider disposed on the other of the opposite sides of the sheet supporter so as to be movable in the width direction of the sheet,

wherein the sheet supporter is provided with an elongate opening penetrating the support surface and extending in the width direction of the sheet,

wherein the guide and the slider are coupled to each other through the elongate opening, such that the guide and the slider are movable together in the width direction of the sheet,

wherein the guide includes a first hook hooked on a portion of the sheet supporter at a position spaced downstream of the elongate opening in the conveyance direction, the first hook being configured to be movable in the width direction of the sheet along the portion of the sheet supporter,

wherein the guide includes a first coupling portion and the slider includes a second coupling portion, the first coupling portion and the second coupling portion being coupled to each other through the elongate opening so as to couple the guide and the slider to each other,

wherein the guide includes two second contact portions provided in the vicinity of the first coupling portion so as to be in contact with the support surface of the sheet supporter at two positions of the guide that are spaced apart from each other in the width direction of the sheet, and

wherein the slider includes two third contact portions in the vicinity of the second coupling portion so as to be in contact with another surface of the sheet supporter opposite to the support surface at two positions of the slider that are spaced apart from each other in the width direction of the sheet.

11. The sheet supporting device according to claim 10 ,

wherein a protrusion is formed on the support surface of the sheet supporter so as to extend in the width direction of the sheet, and

wherein the second contact portions are in contact with the protrusion.

12. The sheet supporting device according to claim 11 , wherein the protrusion is formed along an edge of the elongate opening.

13. A sheet conveying device, comprising:

a sheet conveyor configured to convey a sheet downstream in a conveyance direction along a conveyance path;

a sheet supporter having a support surface for supporting a sheet to be conveyed downstream in a conveyance direction by the sheet conveyor;

a guide disposed on one of opposite sides of the sheet supporter on which the support surface is provided and configured to be movable along the support surface in a width direction of the sheet orthogonal to the conveyance direction, the guide having a guide surface configured to come into contact with an edge, in the width direction, of the sheet supported on the sheet supporter; and

a slider disposed on the other of the opposite sides of the sheet supporter so as to be movable in the width direction of the sheet,

wherein the sheet supporter is provided with an elongate opening penetrating the support surface and extending in the width direction of the sheet,

wherein the guide and the slider are coupled to each other through the elongate opening, such that the guide and the slider are movable together in the width direction of the sheet,

wherein the guide includes a first hook hooked on a portion of the sheet supporter at a position spaced downstream of the elongate opening in the conveyance direction, the first hook being configured to be movable in the width direction of the sheet along the portion of the sheet supporter,

wherein the guide and the slider are coupled to each other upstream of a central portion of the guide in the conveyance direction, and

wherein the first hook is hooked on the sheet supporter downstream of the central portion of the guide in the conveyance direction.