Blender rigging join two ik-chain in one system I can't solve this problem in any way (marked &quot;trouble&quot; on gif)
&quot;A&quot; and &quot;C&quot; are separate IK-chains that work well. But, I cannot connect them correctly.
&quot;C.2&quot; bone locked rotation, only location transform. In this example was try to use Limit distance constraint from &quot;B.1&quot; bone to &quot;A.IK-target&quot; bone. And &quot;C.IK-target&quot; bone use Locked track constraint to &quot;B.1&quot; bone.
Thanks for any advice on this issue.

update:
shared blend-file
https://blend-exchange.com/b/78jeelJa
This is rig of door. All joints must be connected and must not separate in animation.
Problem solved with 3 ik-chains, finished file attached
https://blend-exchange.com/b/8MybezWq