JP2008032105A5 - - Google Patents

Claims (12)

A joint for connecting a bellows-like corrugated pipe to a gas pipe or the like,
The corrugated pipe end is pulled out from the joint by pushing the corrugated pipe into the joint, and then sliding a sleeve slidably disposed in the front portion of the joint where the corrugated pipe is inserted. An insertion joint for corrugated pipes, which is fixed impossible. A tubular joint body having an inner hole into which the corrugated pipe is inserted, an airtight packing disposed in the inner hole and in close contact with an outer peripheral surface of the corrugated pipe, and disposed in the inner hole, the corrugated pipe A retainer having a claw that engages with the annular recess of the outer periphery and an outer peripheral tapered surface that is formed so as to be tapered inward toward the front side of the inner hole, and slides backward in the inner hole of the joint body. A retainer pushing sleeve that has an inner circumferential tapered surface that presses against the outer circumferential tapered surface of the retainer, and a traction member that has a receiving portion against which an insertion side end portion of the corrugated pipe inserted into the inner hole abuts. The insertion joint for corrugated pipes of Claim 1 characterized by the above-mentioned. The clearance gap is ensured between the receiving part of the said traction member, and the step part end surface in the said coupling main body in the state in which the said retainer pushing sleeve was pushed in to the final insertion position. Or the insertion joint for corrugated pipes of 2 description. The retainer pushing sleeve has a large-diameter portion on the near side and a cylindrical insertion portion on the far side,
Between the outer periphery of the cylindrical insertion portion and the inner periphery of the joint body, a stopper ring for fixing the retainer pushing sleeve and the joint body is interposed,
As sandwiched between the large diameter portion and the fitting body, a removable alignment collar is characterized Tei Rukoto mounted, corrugated pipe plug coupling according to any one of claims 1-3. When the retainer pushing sleeve is pushed from the immediately preceding position to the final insertion position, the retainer is pushed and moved in the inner hole depth direction, whereby the hermetic packing is compressed. The corrugated pipe insertion joint according to claim 4 . The corrugated pipe insertion joint according to any one of claims 1 to 5 , wherein a member having higher rigidity than the hermetic packing is provided between the retainer and the hermetic packing. The positioning collar is a ring-shaped member attached to the cylindrical insertion portion of the retainer pushing sleeve,
Characterized in that it has a thick portion for positioning the retainer push sleeve to the initial position, and a thin portion for stopping the retainer pressing sleeve by the immediately preceding position, claim 4-6 The insertion joint for corrugated pipes of any one of these. The alignment collar has a slit at the boundary portion between said thick portion the thin portion, manually, characterized in that it is possible to separate the thick portion from the thin portion, according to claim 7 Corrugated pipe insertion fitting. The thin-walled portion is C-shaped, and a pair of finger-hanging portions protruding to the outside in the radial direction of the cylindrical insertion portion so that a human finger can be hooked when removing the thin-walled portion from the cylindrical insertion portion The insertion joint for corrugated pipes according to claim 8 or 9 , wherein is formed. As the positioning collar,
Both have two C-shaped rings removably attached to the cylindrical insertion part,
When the two C-shaped rings are mounted, the retainer pushing sleeve is defined at the initial position,
The corrugated pipe insertion joint according to claim 4 , wherein the retainer pushing sleeve can be moved to the immediately preceding position by removing one of the two C-shaped rings. The direction of removing the one of the C-shaped ring, the other of said C-shaped ring, characterized in that different and direction of removing the corrugated pipe bayonet joint of claim 1 0. Each of the C-shaped rings is formed with a pair of finger-hanging portions protruding outward in the radial direction of the cylindrical insertion portion so that a human finger can be hooked when removing the ring. to, corrugated pipe bayonet joint of claim 1 1.