Post-processing device and image forming apparatus

1. A post-processing device including a stapler, the post-processing device comprising:

a restraint mechanism that restrains the stapler so that the stapler does not deviate from an initial position when a covering part is opened; and

a restraint release mechanism that, when the covering part is closed, releases restraint of the stapler by the restraint mechanism.

2. The post-processing device according to claim 1 ,

wherein the restraint mechanism includes

a restraint member including an engaging portion that engages an engaged portion provided in the stapler, and

an urging member that urges the engaging portion toward the engaged portion.

3. The post-processing device according to claim 2 ,

wherein the engaging portion has an end face that faces an upstream side in a movement direction in which the stapler moves to the initial position, the end face being tapered.

4. The post-processing device according to claim 3 ,

wherein the engaging portion engages the engaged portion by protruding from a lower side in a vertical direction.

5. The post-processing device according to claim 4 ,

wherein the stapler is movable on a support board, and

wherein the support board has an opening, and the engaging portion engages the engaged portion through the opening.

6. The post-processing device according to claim 5 ,

wherein the restraint member rotates around a support shaft and includes a base portion on a side opposite to the engaging portion with respect to the support shaft,

wherein the covering part has an inner face on which the restraint release mechanism is provided, and

wherein the restraint release mechanism is a protrusion that pushes the base portion so that the engaging portion rotates in a direction away from the engaged portion when the covering part is closed.

7. The post-processing device according to claim 6 ,

wherein the base portion is disposed closer than the stapler to the covering part.

8. The post-processing device according to claim 4 ,

wherein the restraint member rotates around a support shaft and includes a base portion on a side opposite to the engaging portion with respect to the support shaft,

wherein the covering part has an inner face on which the restraint release mechanism is provided, and

wherein the restraint release mechanism is a protrusion that pushes the base portion so that the engaging portion rotates in a direction away from the engaged portion when the covering part is closed.

9. The post-processing device according to claim 8 ,

wherein the base portion is disposed closer than the stapler to the covering part.

10. The post-processing device according to claim 3 ,

wherein the restraint member rotates around a support shaft and includes a base portion on a side opposite to the engaging portion with respect to the support shaft,

wherein the covering part has an inner face on which the restraint release mechanism is provided, and

wherein the restraint release mechanism is a protrusion that pushes the base portion so that the engaging portion rotates in a direction away from the engaged portion when the covering part is closed.

11. The post-processing device according to claim 10 ,

wherein the base portion is disposed closer than the stapler to the covering part.

12. The post-processing device according to claim 2 ,

wherein the engaging portion engages the engaged portion by protruding from a lower side in a vertical direction.

13. The post-processing device according to claim 12 ,

wherein the stapler is movable on a support board, and

wherein the support board has an opening, and the engaging portion engages the engaged portion through the opening.

14. The post-processing device according to claim 13 ,

wherein the restraint member rotates around a support shaft and includes a base portion on a side opposite to the engaging portion with respect to the support shaft,

wherein the covering part has an inner face on which the restraint release mechanism is provided, and

wherein the restraint release mechanism is a protrusion that pushes the base portion so that the engaging portion rotates in a direction away from the engaged portion when the covering part is closed.

15. The post-processing device according to claim 14 ,

wherein the base portion is disposed closer than the stapler to the covering part.

16. The post-processing device according to claim 12 ,

wherein the restraint member rotates around a support shaft and includes a base portion on a side opposite to the engaging portion with respect to the support shaft,

wherein the covering part has an inner face on which the restraint release mechanism is provided, and

wherein the restraint release mechanism is a protrusion that pushes the base portion so that the engaging portion rotates in a direction away from the engaged portion when the covering part is closed.

17. The post-processing device according to claim 16 ,

wherein the base portion is disposed closer than the stapler to the covering part.

18. The post-processing device according to claim 2 ,

wherein the restraint member rotates around a support shaft and includes a base portion on a side opposite to the engaging portion with respect to the support shaft,

wherein the covering part has an inner face on which the restraint release mechanism is provided, and

wherein the restraint release mechanism is a protrusion that pushes the base portion so that the engaging portion rotates in a direction away from the engaged portion when the covering part is closed.

19. The post-processing device according to claim 18 ,

wherein the base portion is disposed closer than the stapler to the covering part.

20. An image forming apparatus comprising:

an image forming apparatus body that forms an image on a recording medium; and

the post-processing device according to claim 1 , the stapler being configured to use a staple to bind a plurality of the recording mediums that are discharged from the image forming apparatus body.