Image recording apparatus

1. An image recording apparatus, comprising:

a drum for holding a recording medium by winding the recording medium such that the recording medium tightly contacts a surface of a cylinder of the drum, and for conveying the recording medium;

a recording medium conveying mechanism;

a recording head for recording an image on the being-conveyed recording medium, wherein the recording head is arranged in a direction orthogonal to a conveying direction of the recording medium;

a faulty record detection unit for detecting a faulty record of the image recorded by the recording head; and

a control unit for controlling the drum, the recording head, and the faulty record detection unit,

wherein both the recording head and the faulty record detection unit are fixed to a same coupling member such that: (i) both the recording head and the faulty record detection unit are arranged opposite to a winding portion of the drum where the recording medium is windingly held tightly contacting the surface of the cylinder of the drum, and (ii) the faulty record detection unit is arranged more downstream in the conveying direction than the recording head, and

wherein the coupling member is fixed to a fixing member that holds a rotation shaft of the drum.

2. The apparatus according to claim 1 , further comprising a position sensor for detecting a position of an end portion of the recording medium which is conveyed on the drum,

wherein an incorporated unit of the recording head and the faulty record detection unit fixed to the same coupling member is travel-controlled in a primary scanning direction according to information about the detected position of the end portion of the recording medium.

3. The apparatus according to claim 2 , wherein the faulty record detection unit comprises the position sensor.

4. The apparatus according to claim 1 , wherein a back tension is applied to a start of a roll of the recording medium that is wound and held on the drum such that a vertical drag operates against the surface of the cylinder of the drum.

5. An image recording apparatus which records an image on a recording medium, comprising:

a rotatable drum for holding the recording medium by winding the recording medium such that the recording medium tightly contacts a surface of a cylinder of the drum, and for conveying the recording medium;

a recording head which has a recording area that extends over a width of the recording medium; and

a faulty record detection unit for detecting a faulty record of an image recorded by the recording head,

wherein the image is recorded by conveying the recording medium to the recording head;

wherein both the recording head and the faulty record detection unit are fixed to a same coupling member such that: (i) both the recording head and the faulty record detection unit are arranged opposite to a winding portion of the drum where the recording medium is windingly held tightly contacting the surface of the cylinder of the drum, and (ii) the faulty record detection unit is arranged more downstream in a conveying direction than the recording head; and

wherein the coupling member is fixed to a fixing member that holds a rotation shaft of the drum.

6. The apparatus according to claim 4 , wherein a back tension is applied to an end of the roll of the recording medium that is wound and held on the drum such that the vertical drag operates against the surface of the cylinder of the drum.