CONNECTION STRUCTURE FOR JOINT AND HOSE, AND CONNECTION STRUCTURE FOR JOINT AND PIPE

摘要

PROBLEM TO BE SOLVED: To restrict a metering of flow rate of fluid near an interface between the extremity end of a core part of a joint main body and an inner surface of a hose and to reduce a pressure loss.SOLUTION: A connection structure S10 for a joint and a hose comprises a joint main body 16 provided with a core part 16A in which an inner peripheral surface of a hose 14 having a reinforcing layer 14B arranged therein is contacted and a metallic caulking part 18 arranged at the joint main body 16 and extended along the core 16A to caulk the hose 14 against the core part 16A and fix it. The hose 14 is provided with a hose side thickness changing part 46 in which its inner diameter is increased in a stepwise manner toward the extremity end of the hose 14 in its inserting direction and its thickness is made thin in a stepwise manner. The core part 16A is contacted with the hose side thickness changing part 46 when the hose 14 is inserted, and the core part 16A is provided a core side thickness changing part 36 in which an outer diameter at the extremity end in an axial direction is smaller than an outer diameter at a deep side in an axial direction and a thickness at the extremity end in an axial direction is thinner than a thickness at a deep side in an axial direction.SELECTED DRAWING: Figure 1