Attachment member, member attachment structure, and member attachment method

1. An attachment member which is attachable to target members of different types, the attachment member comprising:

a member main body;

a first protrusion which is provided on an end portion of the member main body and is engageable with a first engaged part formed on a first target member;

a second protrusion which is provided on the end portion of the member main body and is engageable with a second engaged part formed on a second target member;

an advancement and retraction mechanism which is configured to cause the second protrusion to advance and retract from the end portion of the member main body; and

a third protrusion which is provided on the end portion of the member main body, and protrudes from the end portion of the member main body,

wherein the end portion of the member main body has a long shape in one direction, and

the third protrusion has a claw base part and a cutout part, the cutout part being recessed in the one direction and being engageable with an inner circumferential edge of a locking hole of the target members.

2. The attachment member according to claim 1 , wherein,

when the member main body is attached to the first target member,

the first protrusion is engaged with the first engaged part, and the second protrusion is retracted inside the end portion of the member main body by the advancement and retraction mechanism, and the end portion of the member main body around the second protrusion comes into contact with the first target member.

3. The attachment member according to claim 1 , wherein,

when the member main body is attached to the second target member,

the second protrusion is engaged with the second engaged part, and the first protrusion is inserted into another second engaged part different from the second engaged part with which the second protrusion is engaged.

4. The attachment member according to claim 3 , wherein an external dimension of the first protrusion in a direction orthogonal to a direction which connects a first end portion and a second end portion of the member main body is smaller than that of the second protrusion.

5. The attachment member according to claim 1 , wherein the first protrusion and the second protrusion have different shapes when seen in a direction in which a first end portion is connected to a second end portion of the member main body.

6. The attachment member according to claim 1 , wherein a plurality of sets of the first protrusion and the second protrusion are provided.

7. The attachment member according to claim 1 , wherein,

the first protrusion, the second protrusion, and the advancement and retraction mechanism are provided at both end portions of the member main body, and

the third protrusion is provided at least at first end portion of the member main body, and protrudes from the end portion of the member main body.

8. The attachment member according to claim 1 , wherein,

the advancement and retraction mechanism comprises:

a protrusion member which forms the second protrusion;

a holding member which holds the protrusion member to be advanceable and retractable from the end portion of the member main body; and

a biasing member which is configured to bias the protrusion member in a direction of protruding from the end portion of the member main body.

9. A member attachment structure to a member that is target,

wherein the member comprises:

a member main body;

a first protrusion which is provided at an end portion of the member main body;

a second protrusion which is provided at the end portion of the member main body; and

an advancement and retraction mechanism which is configured to cause the second protrusion to advance and retract from the end portion of the member main body, and

wherein the first protrusion is engaged with an engaged part formed on the member that is target, the second protrusion is retracted inside the end portion of the member main body by the advancement and retraction mechanism, and the end portion of the member main body around the second protrusion is brought into contact with the member that is target,

wherein the member further comprises a third protrusion which is provided on the end portion of the member main body, and protrudes from the end portion of the member main body,

wherein the end portion of the member main body has a long shape in one direction, and

the third protrusion has a claw base part and a cutout part, the cutout part being recessed in the one direction and being engageable with an inner circumferential edge of a locking hole of the member that is target.

10. A member attachment method to a target member, the member attachment method comprising:

engaging a first protrusion provided at an end portion of a member main body of a member with an engaged part formed on the target member, causing a second protrusion provided to be advanceable and retractable from the end portion of the member main body to retract inside the end portion, and bringing the end portion of the member main body around the second protrusion into contact with the target member; and

connecting the end portion of the member main body to the target member,

wherein, in the engaging, a cutout part of a third protrusion is engageable with an inner circumferential edge of a locking hole of the target member, the third protrusion having the cutout part recessed in one direction and a claw base part, the third protrusion being provided on the end portion of the member main body and protruding from the end portion of the member main body.