JP2009133448A5 - - Google Patents

Claims (5)

A joint in which an outer cylinder part and an inner cylinder part are formed coaxially at one end part, and a tubular body is inserted into the annular housing space formed between the outer cylinder part and the inner cylinder part from the one end opening part A seal member made of an elastic material that is provided on the outer peripheral surface of the main body and the inner cylindrical portion and seals between the outer peripheral surface of the inner cylindrical portion and the inner peripheral surface of the tubular body inserted into the housing space; A taper that is provided at the end of the housing space on the opening side from the seal member so as to be movable in the axial direction of the housing space and has a smaller diameter on the inner peripheral surface from the inside of the housing space toward the opening. An annular guide member having a surface formed thereon, and when the guide member is moved to the inside of the accommodation space by a tube inserted into the accommodation space, the seal member is elasticized by the tapered surface. In pipe joints that are automatically crushed,
On the outer peripheral surface of the guide member, a protrusion that elastically presses and contacts the inner peripheral surface of the outer cylinder portion when the inner peripheral surface of the guide member formed with the tapered surface crushes the seal member. A pipe joint characterized in that is provided. A joint in which an outer cylinder part and an inner cylinder part are formed coaxially at one end part, and a tubular body is inserted into the annular housing space formed between the outer cylinder part and the inner cylinder part from the one end opening part A sealing member made of an elastic material that is provided on the outer peripheral surface of the main body and the inner cylindrical portion and seals between the outer peripheral surface of the inner cylindrical portion and the inner peripheral surface of the tubular body inserted into the housing space; The taper is provided at the end of the housing space on the opening side of the seal member so as to be movable in the axial direction of the housing space, and has a tapered diameter on the inner peripheral surface from the inside of the housing space toward the opening. An annular guide member having a surface formed thereon, and when the guide member is moved to the inside of the accommodation space by a tube inserted into the accommodation space, the seal member is elastically formed by the tapered surface. In pipe joints that are automatically crushed,
A protrusion that elastically presses and contacts the inner peripheral surface of the outer cylindrical portion is provided on the outer peripheral surface of the guide member, and the magnitude of the frictional resistance generated between the protrusion and the inner peripheral surface of the outer cylindrical portion is When the inner peripheral surface of the guide member formed with the tapered surface is in contact with the seal member with the opening of the housing space facing upward, the guide member moves downward by its own weight. A pipe joint characterized in that it is set to a size that prevents it from occurring. A straight hole extending from the portion facing the seal member toward the inside of the housing space is formed coaxially with the housing space on the inner peripheral surface of the outer cylinder portion, and the protrusion is elastically formed in the straight hole. The pipe joint according to claim 1, wherein the pipe joint is in press contact . Three or more protrusions are provided, and the three or more protrusions are spaced apart from each other in the circumferential direction so that only the three or more protrusions are in pressure contact with the inner peripheral surface of the straight hole portion. The pipe joint according to claim 3. The guide member has a slit extending from one end thereof toward the other end and having both sides opened on the outer peripheral surface of the guide member, whereby the guide member has one end on the other end side of the guide member. A tongue piece whose tip is elastically displaceable in the radial direction of the guide member with the proximal end located at the center as a center, and the projection is formed at the tip of the outer surface of the tongue. The pipe joint according to any one of claims 1 to 4, wherein the pipe joint is characterized.