JPH0269193U - - Google Patents

Description

[Brief explanation of drawings]

Fig. 1 is a sectional view of the first embodiment of the free curvature pipe according to the present invention in a straight pipe state, Fig. 2 is a sectional view of the same in a bent pipe state, and Figs. 3, 4, and 5 are respectively Explanatory diagram showing the fixing means, No. 6
The figure is a sectional view showing a second embodiment of the present invention. 1: Unit pipe body, 2: Concave groove, 3: Packing, 4
: Packing outer fitting part, 5: Recessed part, 6: Expanded diameter part, 7
: Engagement convex portion, 8: Engagement stepped portion, 9: Connecting pipe body, 10
: Fixed external fitting part, 11: Floating external fitting part, 12: Engagement recess, 13: Convex part, 14: Band body, 15: Band interior recess, 16: Seal, 17: Bolt, 18: Nut, 19 : U-shaped metal fitting, 20: Bottomed hole, 21: Engagement protrusion, 22: Engagement recess.

Claims (1)

[Claims for Utility Model Registration] (1) At the other end of the unit pipe body part with elastic packing fitted around the outer periphery of one end, the inner diameter extends at least over the length from the end surface of the packing outer fitting part to the packing. A side end of the packing outer fitting part of another same pipe body is attached to the floating outer fitting part of a pipe body provided with a floating outer fitting part sized so that the packing outer circumferential surface of the packing outer fitting part can come into contact with the inner surface of the packing outer fitting part. After inserting the packing to a depth where the outer circumferential surface of the packing contacts the inner surface and connecting the two, a bending force is applied between the two tubes, so that one tube is A free curvature tube in which the end face side of the other tube is kept in a compressed state relative to the body, while the other tube is kept in a compressed state, so that a required angle is formed between the two tubes. (2) The free curvature tube according to claim 1, wherein the unit tube portion is of a substantially straight tube shape. (3) A unit tube having an elastic packing fitted around the outer periphery of one end, and fixing the one side of the unit tube so that its inner surface shape substantially matches the outer surface shape of the end opposite to the packing outer fitting part of the unit tube. an outer fitting part, and the other side is such that the packing outer circumferential surface of the packing outer fitting part contacts the inner surface over at least the length from the end face to the packing in the packing outer fitting part of the unit pipe body; The fixed outer fitting part of the connecting pipe body is positioned at the opposite end of the packing outer fitting part of one unit pipe body and is externally fitted. , the packing outer peripheral surface of the other unit pipe body comes into contact with the inner surface at the same time as the end of the packing outer fitting part of the other unit pipe body contacts or approaches the end of the other unit pipe body within the floating outer fitting part of the connecting pipe body. After inserting the connecting tube up to the end and fitting the connecting tube over the two unit tubes to connect both unit tubes, bending force is applied between the two unit tubes to create the connection. Inside the pipe, the unit pipe whose end on the side opposite to the packing external fitting part is visible is connected to the unit pipe body whose end on the side opposite to the packing external fitting part is visible, while maintaining the compressed state of the packing. , a free curvature tube whose end face side is inclined so that a required angle is formed between two unit tube bodies. (4) A unit tube having an elastic packing fitted around the outer periphery of one end, and fixing on one side so that the inner shape of the unit tube substantially matches the outer shape of the end opposite to the packing outer fitting part of the unit tube. an outer fitting part, and the other side is such that the packing outer circumferential surface of the packing outer fitting part contacts the inner surface over at least the length from the end face to the packing in the packing outer fitting part of the unit pipe body; A connecting pipe body formed into a floating outer fitting part with a large size, and a connecting pipe body divided into at least two parts in a direction parallel to the axis, and the divided connecting pipe body being fixed together on the outer periphery of the connecting pipe body. a convex portion on either the side opposite to the end surface of the packing outer fitting portion of the unit pipe body and the inner surface on the distal end side of the floating outer fitting portion of the connecting pipe body; is provided with a concave portion in which the convex portion is slidably inserted in the axial direction of the unit pipe body or the connecting pipe body, and at the end opposite to the packing outer fitting portion of one unit pipe body, the other unit pipe is inserted. The ends of the body on the side of the packing external fitting part are brought into contact with or close to each other, and the divided connecting pipe body is straddled over these two unit pipe bodies, and a fixed external fitting part is attached to the outer periphery of the end opposite to the packing external fitting part. , the outer peripheral surface of the packing is brought into contact with the inner surface of the outer periphery of the end on the side of the outer fitting part of the packing, and the unit pipe body with the end on the side of the outer fitting part of the packing can be freely approached or separated from the other unit pipe body. The floating external fitting portion is positioned so that the convex portion provided on one of the unit pipe body and the connecting pipe body is positioned in the recess provided on the other, and the floating external fitting portion is fitted externally, and the divided connecting pipe body is attached to the fixing means. After connecting both unit pipes by fixing them together with The unit tube with the end of the outer fitting part of the packing facing toward the unit tube that has been bent is placed between the two unit tubes with the end surface side in an inclined state while maintaining the compressed state of the packing. A free curvature tube that forms the required angle. (5) Use a metal band as a fixing means,
5. The free curvature tube according to claim 4, wherein a connecting tube body formed by dividing into at least two parts is integrated, the band body is wound around the outer periphery, and the ends of the band body are fixed to each other. (6) The free curvature tube according to claim 3, 4 or 5, wherein the unit tube body is a substantially straight tube. (7) Claim 1 in which the floating external fitting part utilizes a tapered shape in which at least one inner surface of the surface passing through the axis is tapered so that the inner diameter of the distal end is larger than that of the proximal end. - 6. Free curvature tube according to item 6. (8) Claim 1, wherein a concave groove is provided around the part where the packing is externally fitted, and the packing is externally fitted into the concave groove so as to be exposed from the surface of the pipe body.
7. Free curvature tube according to 7.