Transport apparatus and recording apparatus provided with the same

1. A transport apparatus comprising:

a guide surface which extends in a transport direction for transporting a medium and which is configured to guide the medium to be transported;

a first roller which is a driving roller for transporting the medium;

a second roller which is a driven roller arranged to face the first roller; and

a roller support member which rotatably supports the second roller and which is configured to be pivotable about a support shaft extending in a direction perpendicular to an axis of a rotational shaft of the second roller between a first position and a second position,

wherein in a state that the roller support member is positioned at the first position, an angle formed by a portion of the guide surface, which is disposed on a downstream side in the transport direction from a point of intersection between the axis of the rotational shaft of the second roller and the guide surface, and the axis of the rotational shaft of the second roller is an acute angle,

wherein in a state that the roller support member is positioned at the second position, the angle approaches a right angle as compared with the state that the roller support member is positioned at the first position, and

wherein a center of the second roller is positioned between the support shaft and the guide surface in relation to an axial direction of the rotational shaft of the second roller.

2. The transport apparatus according to claim 1 , further comprising a first urging member which urges the roller support member in a direction in which the second roller is disposed at the first position.

3. The transport apparatus according to claim 2 , wherein the second roller is positioned between the support shaft and the guide surface in relation to the axial direction.

4. The transport apparatus according to claim 2 , further comprising a second urging member which urges the second roller in a direction in which the second roller presses the first roller,

wherein the first roller is arranged so that an axis of a rotational shaft of the first roller is perpendicular to the guide surface,

the second roller is arranged above the first roller, and

a lowermost portion of the second roller is positioned on one of the axis of the rotational shaft of the first roller and an upstream side in the transport direction from the axis of the rotational shaft of the first roller irrelevant to a position of the second roller.

5. The transport apparatus according to claim 4 , wherein in the state that the roller support member is positioned at the second position, the lowermost portion of the second roller is positioned on the axis of the rotational shaft of the first roller.

6. The transport apparatus according to claim 2 , further comprising a second urging member which urges the second roller in a direction in which the second roller presses the first roller,

wherein the first roller is arranged so that an angle formed by a portion of the guide surface, which is disposed on the downstream side in the transport direction from a point of intersection between an axis of a rotational shaft of the first roller and the guide surface, and the axis of the rotational shaft of the first roller is an acute angle,

the second roller is arranged above the first roller, and

in the state that the roller support member is positioned at the second position, a part of a lowermost portion of the second roller, which is positioned farthest from the guide surface, is positioned on one of the axis of the rotational shaft of the first roller and an upstream side in the transport direction from the axis of the rotational shaft of the first roller.

7. The transport apparatus according to claim 1 , wherein the support shaft is provided on the axis of the rotational shaft of the second roller.

8. The transport apparatus according to claim 1 , further comprising a transport surface which extends in a perpendicular direction to the guide surface and which is configured to support a lower surface of the medium to be transported,

wherein the support shaft is parallel to the guide surface and perpendicular to the transport surface, and

the rotational shaft of the second roller is perpendicular to the support shaft.

9. The transport apparatus according to claim 8 , further comprising an upper guide arranged to face the transport surface and provided with a protruding portion protruding toward the transport surface,

wherein the roller support member comprises:

a holding member which rotatably holds the second roller; and

a rotatable member formed with a slotted hole into which the protruding portion is inserted to regulate a movement range of the roller support member.

10. The transport apparatus according to claim 1 , wherein the roller support member extends in an axial direction of the rotational shaft of the second roller.

11. The transport apparatus according to claim 1 , wherein the second roller is a spur roller.

12. A recording apparatus comprising:

the transport apparatus as defined in claim 1 ; and

a recording head which records an image on the medium.

13. The recording apparatus according to claim 12 , wherein the transport apparatus is arranged in a refeed path provided to return the medium, which has been passed through an area opposed to the recording head, to an upstream side from the area opposed to the recording head.