Pipe-end-connecting joint

A pipe-end-connecting joint connectable to a pipe end of a pipe having a spiral corrugated outer circumferential surface, said joint comprising:

• a nipple adapted to be inserted in a pipe end;
• a holder for tightening the outer circumference of the pipe end;
• and
• a packing attached in said holder, said packing having an inner surface shaped like a semicircular arc,
• wherein said nipple includes a tubular portion provided in one longitudinal end side thereof so as to be insertable in the pipe end, a connection portion provided in another longitudinal end side of said nipple so as to be connected to another joint, and a flange portion provided in a longitudinal intermediate portion of said nipple so as to protrude outwardly,
• wherein said spiral protruding portion has a hardness greater than that of said packing,
• wherein said packing is fitted in a first ring-like groove, and
• wherein said packing formed at said first longitudinal end side presses against said synthetic resin pipe in a direction towards said nipple.

A pipe-end-connecting joint connectable to a pipe end of a synthetic resin pipe having a spiral corrugated outer circumferential surface, said joint comprising:

• a nipple adapted to be inserted in a pipe end;
• a holder for tightening the outer circumference of a pipe end;
• and
• an elastic packing attached in said holder, said elastic packing including two half parts each having an inner surface shaped like a semicircular arc,
• wherein said nipple includes a tubular portion provided in one longitudinal end side thereof so as to be insertable in a pipe end, a connection portion provided in the other longitudinal end side thereof so as to be connected to another joint, and a flange portion provided in a longitudinal intermediate portion thereof so as to protrude outward,
• wherein said holder is divided longitudinally into two split parts, each of said two split parts forming a semicircular inner circumferential surface and comprising:
• a first longitudinal end side in which one of said half parts of said elastic packing is mounted;
• a second longitudinal end side in which a ring-like groove is formed so as to be fitted to said flange portion;
• and
• a longitudinally intermediate portion between said first and second longitudinal end sides, a spiral corrugated portion being formed on said longitudinally intermediate portion of said holder to substantially fit the spiral corrugated outer circumferential surface of a synthetic resin pipe, said spiral corrugated portion having a spiral protruding portion an inner diameter of which is smaller than an outer diameter of a trough portion of a spiral corrugated outer circumferential surface of a synthetic resin pipe,
• wherein said spiral protruding portion has a hardness greater than that of said elastic packing,
• wherein a portion of the pipe distal to a cut end of the pipe is subjected to a planar pressure contact by said elastic packing, and
• wherein the trough portion of the pipe is directly contacted by said spiral protruding portion.

A pipe-end-connecting joint connectable to a pipe end of a pipe having a spiral corrugated outer circumferential surface, said joint comprising:

• a nipple adapted to be inserted in a pipe end;
• a holder for tightening the outer circumference of a pipe end;
• and
• a packing attached in said holder, said packing having an inner surface shaped like a semicircular arc,
• wherein said nipple includes a tubular portion provided in one longitudinal end side thereof so as to be insertable in a pipe end, a connection portion provided in another longitudinal end side of said nipple so as to be connected to another joint, and a flange portion provided in a longitudinal intermediate portion of said nipple so as to protrude outwardly,
• wherein said spiral protruding portion has a hardness greater than that of said elastic packing,
• wherein a portion of the pipe distal to a cut end of the pipe is subjected to a planar pressure contact by said packing, and
• wherein a trough portion of the pipe is directly contacted by a protruding portion of said holder.