Chuck and tube joint

A tube joint comprising:

• a first tube joint member;
• a second tube joint member coupled to said first tube joint member;
• a sleeve member attached to a coupling portion between said first and second tube joint members, for coupling and releasing said first and second tube joint members;
• a resilient member for urging said sleeve member in a direction to couple said first and second tube joint members to one another;
• and
• a chuck for engaging said first and second tube joint members with each other, said chuck including:
• an annular ring section for inserting said first tube joint member therethrough;
• a first engaging section extending from said annular ring section along a central axis (m) of said annular ring section, for making engagement with said first tube joining member, said first engaging section including a plurality of plate tabs which are provided on said annular ring section and inclined with respect to said annular ring section, for making engagement in a receiving part of said first tube joint member;
• and
• a second engaging section extending from said annular ring section along said central axis (m) of said annular ring section, said second engaging section including a plurality of plate springs which are provided on said annular ring section at positions different from those of said plate tabs and being inclined with respect to said annular ring section, for making elastic engagement with said second tube joint member.

A tube joint comprising:

• a first tube joint member;
• a second tube joint member coupled to said first tube joint member;
• a sleeve member attached to a coupling portion between said first and second tube joint members, for coupling and releasing said first and second tube joint members;
• a resilient member for urging said sleeve member in a direction to couple said first and second tube joint members to one another;
• and
• a chuck for engaging said first and second tube joint members with each other, said chuck including:
• an annular ring section for inserting said first tube joint member therethrough;
• a first engaging section extending from said annular ring section along a central axis (m) of said annular ring section, for making engagement with said first tube joining member;
• a second engaging section extending from said annular ring section along said central axis (m) of said annular ring section, for making elastic engagement with said second tube joint member;
• and
• a lock mechanism for selectively restricting rearward displacement of said sleeve member.