Patent ID: 7300077
Filing Date: 2007-11-27
Classification: A47L,B25G,F16B,Y10T

Abstract:
1. A pipe connecting structure for connecting a pair of sleeve form pipes integrally in an axial direction by inserting a male side end portion of one of said pair of sleeve form pipes into an opening of a female side end portion of the other sleeve form pipe to serve as a connecting portion, comprising: a male side protrusion insertion hole and a female side protrusion insertion hole formed in a peripheral surface of each end portion of said connecting portion, such that said protrusion insertion holes are aligned, an engagement protrusion, which is inserted in said protrusion insertion holes and engaged therewith, and an engagement retainer configured to maintain an engagement of said engagement protrusion, wherein a guide rib is formed on said engagement protrusion and a guide groove is formed in an outer peripheral surface of said male side end portion to extend from a distal end edge portion to said male side protrusion insertion hole such that the guide groove forms an indentation in the outer peripheral surface of said male side end portion in a radial direction of the male side end portion, and wherein said guide rib has a tapered surface on the side towards the distal end of said other sleeve form pipe, said tapered surface being tapered downward toward the distal end; wherein said engagement retainer comprises a sleeve member disposed to cover said connecting portion and said sleeve member includes a resilient portion configured to be deformed radially outwardly to generate a biasing force radially inwardly, and wherein an engagement protrusion formed on said sleeve member is inserted into said protrusion insertion holes from the outside of said connecting portion and engaged therein and pressed with said resilient portion to retain such an engaging state of said engagement protrusion.