Pipe Joint Construction

8:

• A pipe joint construction comprising:
• an engaging projection formed in an outer peripheral surface of an inserted pipe section inserted into and connected to a receiving pipe section from a direction of a pipe axis, configured to pass through an annular wall portion formed in a receiving opening side of the receiving pipe section to project radially inward;
• a lock member configured to contact the engaging projection from the direction of the pipe axis and relatively rotatably attachable between the annular wall portion of the receiving pipe section and the engaging projection of the inserted pipe section placed in an inserted and connected position, the lock member including engaging stopper portions projecting therefrom for contacting an inward surface of the annular wall portion of the receiving pipe section from the direction of the pipe axis, thereby preventing relative disengaging movement between the connected pipe sections;
• attachment/detachment recesses formed in the annular wall portion of the receiving pipe section for allowing inserting and removing movements of the engaging stopper portions of the lock member in the direction of the pipe axis;
• and
• an elastic urging member provided between an extending portion projecting from the lock member to an outside of the pipe through an inner peripheral surface of the annular wall portion of the receiving pipe section and the outer peripheral surface of the inserted pipe section, and an outward surface of the annular wall portion of the receiving pipe section, for moving and urging the engaging stopper portions of the lock member rotated about the pipe axis from an attachment/detachment operating position corresponding to the attachment/detachment recesses to a predetermined attachment position toward a side to contact the inward surface of the annular wall portion of the receiving pipe section.

9:

• A pipe joint construction comprising:
• an engaging projection formed in an outer peripheral surface of an inserted pipe section inserted into and connected to a receiving pipe section from a direction of a pipe axis configured to pass through an annular wall portion formed in a receiving opening side of the receiving pipe section to project radially inward;
• a stopper wall portion formed on an inner peripheral surface of the receiving pipe section for contacting one side face of the engaging projection of the inserted pipe section from the direction of the pipe axis, thereby limiting a maximum inserted position;
• a lock member configured to contact the engaging projection of the inserted pipe section from the direction of the pipe axis and relatively rotatably attachable between the annular wall portion of the receiving pipe section and the engaging projection of the inserted pipe section placed in an inserted and connected position, the lock member including engaging stopper portions projecting therefrom for contacting an inward surface of the annular wall portion of the receiving pipe section from the direction of the pipe axis, thereby preventing relative disengaging movement between the connected pipe sections;
• attachment/detachment recesses formed in the annular wall portion of the receiving pipe section for allowing inserting and removing movements of the engaging stopper portions of the lock member in the direction of the pipe axis;
• and
• an elastic urging member provided between the stopper wall portion of the receiving pipe section and a side face of the engaging projection of the inserted pipe section, for moving and urging the engaging stopper portions of the lock member rotated about the pipe axis from an attachment/detachment operating position corresponding to the attachment/detachment recesses to a predetermined attachment position toward a side to contact the inward surface of the annular wall portion of the receiving pipe section.

10:

• A pipe joint construction comprising:
• an engaging projection formed in an outer peripheral surface of an inserted pipe section inserted into and connected to a receiving pipe section from a direction of a pipe axis, configured to pass through an annular wall portion formed in a receiving opening side of the receiving pipe section to project radially inward;
• a stopper wall portion formed on an inner peripheral surface of the receiving pipe section for contacting one side face of the engaging projection of the inserted pipe section from the direction of the pipe axis, thereby limiting a maximum inserted position;
• a lock member configured to contact the engaging projection of the inserted pipe section from the direction of the pipe axis and relatively rotatably attachable between the annular wall portion of the receiving pipe section and the engaging projection of the inserted pipe section placed in an inserted and connected position, the lock member including engaging stopper portions projecting therefrom for contacting an inward surface of the annular wall portion of the receiving pipe section from the direction of the pipe axis, thereby preventing relative disengaging movement between the connected pipe sections;
• attachment/detachment recesses formed in the annular wall portion of the receiving pipe section for allowing inserting and removing movements of the engaging stopper portions of the lock member in the direction of the pipe axis;
• and
• elastic urging members provided between an extending portion projecting from the lock member to an outside of the pipe through between an inner peripheral surface of the annular wall portion of the receiving pipe section and the outer peripheral surface of the inserted pipe section, and an outward surface of the annular wall portion of the receiving pipe section, and provided between the stopper wall portion of the receiving pipe section and a side face of the engaging projection of the inserted pipe section, respectively, for moving and urging the engaging stopper portions of the lock member rotated about the pipe axis from an attachment/detachment operating position corresponding to the attachment/detachment recesses to a predetermined attachment position toward a side to contact the inward surface of the annular wall portion of the receiving pipe section.