Abstract: A strip member that can be made into a spiral pipe with an enlarged perimeter by being spirally wound. A first fitting portion (93) is disposed in one end portion of a cross-section orthogonal to an extending direction of a strip member (90) and a second fitting portion (94) is disposed in the other end portion of the cross-section. A spiral pipe (9) is made by spirally winding the strip member (90) and fitting the second fitting portion (94) with the first fitting portion (93) preceding by one turn. The strip member (90) has a cross-sectional configuration in which a reference width direction W9 connecting the first fitting portion (93) and the second fitting portion (94) on the cross-section is inclinable to an outer surface side toward the first fitting portion side when the strip member is wound.

Abstract: The present invention provides a pipe-making apparatus and a pipe-making method capable of making a spiral pipe variably adjusting a diameter or a perimeter of the pipe without an inner periphery limiter. An edge 94 of a following strip portion 92 of a strip member 90 is fitted with a corresponding edge 93 of a preceding pipe portion 91 preceding by one turn by a pipe-making part 3a of a pipe-making apparatus 3, the following strip portion 92 following the preceding pipe portion 91 precedingly made into the spiral pipe, the following strip portion not yet made into the pipe. The pipe-making apparatus 3a is propelled along a spiral winding direction accompanying the fitting. A position 9q of the fitting is variably adjusted by a fitting height adjuster such as an operating lever 30 in a machine height direction HD or a pipe inside-outside direction VD.

Abstract: A spiral pipe (9) is formed by joining edges of adjacent turns of a strip member (90) while helically winding the strip member using a pipe-making apparatus. A propulsive reaction force for moving in a winding direction of the strip member is imparted to a following strip portion (92) or a preceding spiral pipe portion (91) of the strip member by a propulsive reaction force imparting portion of the pipe-making apparatus. The following strip portion follows a preceding spiral pipe portion that has already been made into a pipe. A resisting force in a direction opposite to the propulsive reaction force is imparted to the strip member along the winding direction by a friction between a resisting force imparting portion and the strip member generated while the strip member is moved forward. In this arrangement, a diameter limiting frame can be omitted, and thereby, the pipe-making apparatus can be downsized.

Abstract: A strip member that can be made into a spiral pipe with an enlarged perimeter by being spirally wound. A first fitting portion (93) is disposed in one end portion of a cross-section orthogonal to an extending direction of a strip member (90) and a second fitting portion (94) is disposed in the other end portion of the cross-section. A spiral pipe (9) is made by spirally winding the strip member (90) and fitting the second fitting portion (94) with the first fitting portion (93) preceding by one turn. The strip member (90) has a cross-sectional configuration in which a reference width direction W9 connecting the first fitting portion (93) and the second fitting portion (94) on the cross-section is inclinable to an outer surface side toward the first fitting portion side when the strip member is wound.

Abstract: The present invention provides a pipe-making apparatus and a pipe-making method capable of making a spiral pipe variably adjusting a diameter or a perimeter of the pipe without an inner periphery limiter. An edge 94 of a following strip portion 92 of a strip member 90 is fitted with a corresponding edge 93 of a preceding pipe portion 91 preceding by one turn by a pipe-making part 3a of a pipe-making apparatus 3, the following strip portion 92 following the preceding pipe portion 91 precedingly made into the spiral pipe, the following strip portion not yet made into the pipe. The pipe-making apparatus 3a is propelled along a spiral winding direction accompanying the fitting. A position 9q of the fitting is variably adjusted by a fitting height adjuster such as an operating lever 30 in a machine height direction HD or a pipe inside-outside direction VD.

Abstract: A spiral pipe 9 is formed by joining edges 93, 94 of adjacent turns of a strip member 90 while helically winding the strip member 90 using a pipe-making apparatus 3. A propulsive reaction force for moving in a winding direction of the strip member 90 is imparted to a following strip portion 92 or a preceding spiral pipe portion 91 of the strip member 90 by a propulsive reaction force imparting portion 10 of the pipe-making apparatus 3. The following strip portion 92 follows a preceding spiral pipe portion 91 that has already been made into a pipe. A resisting force in a direction opposite to the propulsive reaction force is imparted to the strip member 90 along the winding direction by a friction between a resisting force imparting portion 30 and the strip member 90 generated while the strip member 90 is moved forward. In this arrangement, a diameter limiting frame can be omitted, and thereby, the pipe-making apparatus 3 can be downsized.