JPH01120734U - - Google Patents

Description

[Brief explanation of the drawing]

Fig. 1 is a partially sectional explanatory view showing a typical embodiment of the free curvature tube according to the present invention, Fig. 2 is an explanatory perspective view showing a ring-shaped fastening means, and Fig. 3 is a locking of the insertion part. FIG. 4 is a plan view showing an embodiment in which a combination structure of an annular protrusion and a groove is adopted as the locking uneven part of the insertion part, and FIG. FIG.
FIG. 2 is an explanatory plan view showing a state in which a curved pipe is constructed by connecting unit curved pipes. 1: Unit curved pipe, 2: Ring-shaped fastening means, 3: Insertion part, 4: Receiving part, 5: Main body pipe part, 6: Locking uneven part, 7: Packing, 8: Flange, 9: Annular member, 10: Pivot point, 11: Hole, 12: Edge, 1
3: bolt, 14: nut, 15, 16: locking protrusion, 17: annular protrusion, 18: groove, 19: screw.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) An insertion part that is in the shape of a straight pipe and has an uneven surface for locking on its outer circumferential surface; A unit curved pipe in which a receiving part which is set slightly larger and has a flange on the outside of the edge is connected at a certain angle through the main body pipe part, and a receiving part of the unit curved pipe is connected to another unit curved pipe. A free curvature tube comprising a ring-shaped fastening means having an engaging part that engages with the flange and the locking uneven part when the insertion part is inserted. (2) As the locking unevenness provided on the insertion part, a plurality of annular protrusions are arranged side by side at appropriate intervals, a groove is carved between each annular protrusion, and the outer part of the annular protrusion is The free curvature tube according to claim 1, which has a diameter set to a size that allows it to be inserted into the receiving portion. (3) In the free curvature tube described in claim 1 of the utility model registration claim, instead of the locking uneven portion, a screw is formed to be threaded across the outer circumferential surface of the insertion portion and the inner circumferential surface of the receiving portion. Free curvature tube. (4) A free curvature tube according to claim 1 of the utility model registration, in which a plurality of protrusions are provided in place of the locking uneven portion. (5) As a ring-shaped fastening means, one end of each of two semicircular annular members is pivotally connected, and the other end has a protruding side with a hole formed therein, and a bolt is inserted into the hole of both protruding sides to connect the bolt. The end of the ring is fastened with a nut, and the inner circumferential surface has a convex part that engages with the locking concave part and a convex part that engages with the flange, which are spaced apart.A ring-shaped member with a split structure is adopted. A free curvature tube according to claim 1 of the utility model registration claim. (6) The free curvature tube according to item 1 of the utility model registration claim, in which the main tube portion is in the shape of a straight tube. (7) An insertion device that has a straight pipe shape, has a locking unevenness on its outer circumferential surface, and has a ring-shaped waterproof packing arranged around the entire circumference of the pipe at the end of the locking unevenness. and a straight pipe-shaped receiving part whose inner diameter is set slightly larger than the outer diameter of the insertion part and a flange provided on the outside of the edge thereof are connected to the insertion part through a straight pipe-shaped main body pipe part. With a unit curved pipe connected in a straight line and at a certain angle with the receiving part, and an insertion part of another unit curved pipe inserted into the receiving part of the unit curved pipe, the flange and the locking unevenness are connected. A free curvature tube comprising: a ring-shaped fastening means having an engaging portion that engages with the portion; (8) As a ring-shaped fastening means, one end of each of two semicircular annular members is pivotally connected, and the other end has a protruding side with a hole formed therein, and a bolt is inserted into the hole of both protruding sides. The end of the ring is fixed with a nut, and the inner circumferential surface is provided with a convex part that engages with the locking concave part and a convex part that engages with the flange at intervals. A free curvature tube according to claim 7 of the utility model registration claim. (9) In the free curvature pipe described in claim 8 of the utility model registration claim, a free curvature pipe formed by fixing and connecting a plurality of unit curved pipes with a fastening means with the insertion part inserted into the receiving part. .