Image forming apparatus and image forming structure

1. An image forming apparatus comprising:

an image forming apparatus main body; and

an image forming structure attached to and removed from the image forming apparatus main body,

in a state where the image forming structure is attached in the image forming apparatus main body, a first concave part being formed in a position opposite to a second concave part formed in an adjacent image forming structure, and

wherein the plurality of image forming structures respectively have:

an image forming structure main body;

an image holder, having an exposed part that can be exposed from the image forming structure main body, attached in the image forming structure; and

an opening and closing part that is opened and closed so as to be movable between a position to cover the exposed part of the image holder and a position to expose the exposed part from the image forming structure main body, and

wherein the opening and closing part is arranged between the first concave part and the second concave part when the opening and closing part is at the position to cover the exposed part of the image holder.

2. The image forming apparatus according to claim 1 , wherein the first concave part is formed in a central portion in a lengthwise direction of the image forming structure.

3. The image forming apparatus according to claim 1 , wherein the first and second concave parts are formed in two positions on both end sides in a lengthwise direction of the image forming structure.

4. An image forming apparatus comprising:

an image forming apparatus main body; and

a plurality of image forming structures attached to and removed from the image forming apparatus main body,

in a state where the image forming structures are attached in the image forming apparatus main body, a first concave part of a first image forming structure being formed so as to be opposite to a second concave part of a second image forming structure adjacent to one end side of the first image forming structure, and a second concave part of the first image forming structure being formed so as to be opposite to a first concave part of a third image forming structure adjacent to another end side of the first image forming structure, and

wherein the plurality of image forming structures respectively have:

an image forming structure main body;

an image holder, having an exposed part that can be exposed from the image forming structure main body, attached in the image forming structure; and

an opening and closing part that is opened and closed so as to be movable between a position to cover the exposed part of the image holder and a position to expose the exposed part from the image forming structure main body, and

wherein the opening and closing part is arranged between the first concave part of the first image forming structure and the second concave part of the second image forming structure when the opening and closing part is at the position to cover the exposed part of the image holder.

5. The image forming apparatus according to claim 4 , wherein, assuming that a clearance between the plurality of adjacent image forming structures is L 1 , a depth of the first concave part is L 2 , and a depth of the second concave part is L 3 , L 1 <L 2 +L 3 holds.

6. The image forming apparatus according to claim 4 , wherein the first concave part and the second concave part are formed in a central portion in a lengthwise direction of the image forming structure.

7. The image forming apparatus according to claim 4 , wherein the first concave part and the second concave part are formed respectively in two positions on both end sides in a lengthwise direction of the image forming structure.

8. An image forming structure, attached to and removed from an image forming apparatus main body, in a state where the image forming structure is attached in the image forming apparatus main body, a first concave part being formed in a position opposite to a second concave part formed in an adjacent image forming structure, and

wherein the image forming structure includes:

an image forming structure main body;

an image holder, having an exposed part that can be exposed from the image forming structure main body, attached in the image forming structure; and

an opening and closing part that is opened and closed so as to be movable between a position to cover the exposed part of the image holder and a position to expose the exposed part from the image forming structure main body, and

wherein the opening and closing part is arranged between the first concave part and the second concave part when the opening and closing part is at the position to cover the exposed part of the image holder.

9. An image forming structure comprising a plurality of image forming units, attached to and removed from an image forming apparatus main body, in a state where the image forming units are attached in the image forming apparatus main body, a first concave part of a first image forming unit being formed so as to be opposite to a second concave part of a second image forming unit adjacent to one end side of the first image forming unit, and a second concave part of the first image forming unit being formed so as to be opposite to a first concave part of a third image,

forming unit adjacent to another end side of the first image forming unit, and

wherein the image forming structure includes:

an image forming structure main body;

an image holder, having an exposed part that can be exposed from the image forming structure main body, attached in the image forming structure; and

an opening and closing part that is opened and closed so as to be movable between a position to cover the exposed part of the image holder and a position to expose the exposed part from the image forming structure main body, and

wherein the opening and closing part is arranged between the first concave part and the second concave part when the opening and closing part is at the position to cover the exposed part of the image holder.

10. The image forming apparatus according to claim 1 , wherein the opening and closing part is opened and closed in accordance with an opening and a closing of a main opening and closing part.

11. The image forming apparatus according to claim 1 , wherein the opening and closing part covers the second concave part when the opening and closing part is at the position to expose the exposed part of the image holder.