JPH043781A - Winding method for pipe - Google Patents

Abstract

PURPOSE:To prevent a pipe from being deformed into a flat state when it is wound by deforming the pipe into a flat state before winding the pipe on a winding drum so that the pipe is formed into a true round shape by the deformation generated when the pipe is wound on the winding drum. CONSTITUTION:A pipe P passes between caliper rollers 21 of a flattening device 20 before the pipe P is wound on a winding drum 10, thus the pipe P is flattened in the vertical direction. When a driving drum 30 presses the pipe P to the winding drum 10, the rotation of the driving drum 30 is transferred to the winding drum 10 via the pipe P, and the winding drum 10 is rotated. A sheet-shaped cushion member 40 is wound on the outside of the wound pipe P. The pipe P is wound on the outside of the cushion member 40. The pipe P is wound in a line along the opposite direction to the winding direction of the previously wound pipe P along the axial direction of the winding drum 10.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for winding a pipe, which is carried out when winding a resin-coated pipe or the like used for, for example, a water pipe into a coil.

(Prior Art) Recently, resin-coated pipes in which the inner circumferential surface of a thin-walled metal pipe, or the inner circumferential surface and the outer circumferential surface thereof are coated with a synthetic resin layer, have been used as water pipes. The resin-clad tube is lightweight and flexible, and is usually wound up into a film shape for convenient transportation at the final stage of the production line. As a method for winding such a resin-coated tube into a coil, a method is generally used in which the tubes P are wound in parallel in multiple stages on the outer surface of a winding drum 1 that is forcibly driven, as shown in FIG. It has been adopted.

(Problem to be Solved by the Invention) When winding a resin-coated tube using such a tube winding method, since the tube P is curved along the outer peripheral surface of the winding drum 1, Application of radial compressive load cannot be avoided. Furthermore, since the tube P is wound around the winding drum 1 in multiple stages, the tube P closer to the winding drum 1 is strongly pressed against the winding drum and compressed in the tube radial direction. Therefore, a large compressive load is applied to the pipe P in the pipe radial direction, and distortion due to the load remains in the pipe P, particularly in the metal pipe portion.

For this reason, even after the tube P is pulled out straight from the winding drum 1, the tube P may be deformed into a flat state. If the pipe P is deformed, not only will its appearance be impaired, but when connecting the pipe P to a fitting, the end of the pipe must be corrected into a perfect circle to ensure sealing performance. Therefore, the workability deteriorates.

If the diameter of the winding drum 1 is increased, deformation of the tube P can be prevented to some extent, but the coil around which the tube P is wound becomes larger, making transportation difficult.

The present invention solves the above conventional problems, and its purpose is to provide a method for winding a tube that does not cause the tube to be deformed into a flat state even when the tube is wound onto a winding drum with a small diameter. It is about providing.

(Means for Solving the Problems) The pipe winding method of the present invention is a pipe winding method in which the pipes are wound on a winding drum in a plurality of stages in a state in which the pipes are lined up in the axial direction of the winding drum. a step of deforming the tube to be wound onto the winding drum so that it is flattened in a direction perpendicular to the radial direction of the winding drum; a step of winding the cushioning material while arranging it in a line in a predetermined direction along the axial direction; a step of winding the cushioning material around the outside of the tubes arranged in a line along the axial direction around the winding drum; A step of winding the previously wound tube while arranging it in a row along the axial direction of the winding drum in a direction opposite to the winding direction of the winding drum. The above objectives are achieved.

(Example) The present invention will be described below with reference to Examples.

As shown in FIG. 1, the tube winding method of the present invention is carried out when the tube P, which is conveyed in a substantially horizontal direction toward the winding drum 10, is wound into a coil shape on the winding drum 10. Pipe P
is a true circular tube that is flexible enough to be rolled up and plastic enough to remain strained when subjected to a compressive load in the radial direction. As such a pipe P, for example, a thin metal pipe,
There are resin-coated tubes in which only the inner circumferential surface of a metal tube or both the inner circumferential surface and the outer circumferential surface are coated with a synthetic resin layer, and synthetic resin tubes reinforced with metal mesh.

In the winding method of the present invention, the tube P is passed through a flattening device 20 before being wound onto the winding drum 10 . As shown in FIG. 2, the flattening device 20 includes a pair of caliber rollers 21 and 21 provided on both sides of the pipe P.
has. The caliber rollers 21 and 21 form an elliptical caliber hole that is elongated in the vertical direction between the rollers. The pipe P is flattened in the vertical direction by passing between the caliber rollers 21 of the flattening device 20.

In this embodiment, a roller die is used in which the opening degree of each caliber roller can be adjusted.

When the tube P is flattened by the flattening device 20, the extubation P
is wound into a coil on the winding drum 10.

The winding drum 10 itself does not have a drive device and is rotatable. A driving drum 30 that is rotationally driven in the direction shown by arrow A is disposed above the winding drum 10, and a pipe P is disposed between the driving drum 30 and the winding drum 10.
will be sent. The rotation of the driving drum 30 is transmitted to the winding drum 10 via the pipe P by the driving drum 30 pressing the pipe P against the winding drum 10 . This causes the winding drum 10 to rotate.

As shown in FIG.
The tubes P are wound up so that they are lined up in a row.

When the tubes P are wound in a line along the circumferential surface of the winding drum 10 in this manner, the sheet-like cushion member 40 is wound around the outside of the wound tubes P. Then,
The tube P is wound around the outside of the cushioning material 40. In this case, the pipe P is rolled in the direction opposite to the winding direction along the axis of the winding drum 10 of the pipe P that was previously wound.
are wound so that they are lined up in a row.

In this way, the pipe P is axially aligned with the winding drum 10.
They are lined up in rows and wound in multiple stages.

The cushion member 4o interposed between each stage of the pipe P may be any member as long as it can absorb the compressive load in the pipe radial direction caused by the pipe P being pressed toward the winding drum 10, for example, Composed of paper, sponge, polymer foam, cork, leather, air packs, etc.

A drive drum 3 that rotates the winding drum 10 via a pipe P
0, a cow spear roll having a semi-elliptical hole 31 with a short horizontal direction is used so as to be in close contact with the upper half circumferential surface of the pipe P which has been flattened in the vertical direction by the flattening device 2o. Ru. For example, the drive drum 30 is connected to the output signal of a tension detection device SO (see FIG. 1) provided at the input side of the flattening device 2o so that the tube P is wound onto the winding drum 1o at an appropriate pressure. The speed is controlled based on The tension detection device 5o comes into contact with the outer circumferential surface of the pipe P and detects the tension applied to the pipe P based on radial deformation of the pipe P, changes in frictional force when the pipe P passes, and the like. Then, the rotational speed of the drive drum 30 is controlled so that the tension of the pipe P detected by the tension detection means 50 is in a proper state.

In such a tube winding method, the tube P advances due to the rotation of the drive drum 3o, and the tube P follows the advancing tube P and is wound on the outer surface of the ram l (l). The pipe P is wound up in multiple stages in a state lined up in the direction.
As the pipe P is wound up, a compressive load is applied to the pipe P in the pipe radial direction due to bending and pressing against the winding drum 10 side. Since the pipe P is passed through the flattening device 20 and flattened in a direction perpendicular to the compression direction, the pipe P is restored to a substantially perfect circle state when the pipe P is wound onto the winding drum 1o. However, since the cushion member 40 is interposed between each stage of the pipe P wound in multiple stages on the winding drum 10,
The load accompanying the pressing of the pipe P against the winding drum 10 side is absorbed by the cushion member 40, and the compressive load applied to the pipe P is suppressed to a small level overall. Therefore, even when the pipe P is wound onto the winding drum 10 having a small diameter, there is no risk that the protective pipe P will be deformed into a flat shape.
As a flattening device for flattening the tube P before it is wound up, a roller die with a pair of caliber rollers whose opening degree can be adjusted is used. You can also use

The drive drum 30 for rotating the winding drum 10 does not need to be a caliber roll (it may also be a flat roll with a constant outer diameter in the axial direction.A flat roll is used as the drive drum 30. In this case, it is desirable to wrap a cushion member around the outer peripheral surface of the pipe P to prevent it from collapsing.

(Effects of the Invention) As described above, in the method for winding a pipe of the present invention, before the pipe is wound onto the winding drum, the pipe becomes perfectly circular due to the deformation that occurs during winding onto the winding drum. In this way, the pipe is deformed into a flat state, and a cushion member is interposed between the pipes wound on the winding drum in the radial direction of the winding drum to reduce the compressive load applied to the pipe. Even when the pipe is wound onto a small-diameter winding drum, deformation of the pipe is suppressed. Therefore, the coil diameter of the tube wound around the winding drum is reduced, making it easy to transport. Moreover, since the tube pulled out from the winding drum has a nearly perfect circular shape, there is no risk of damaging the appearance of the tube.Furthermore, when connecting the tube to a fitting, there is no need to deform the tube end. No more work is required.

Figure 1 is a schematic view showing an example of the pipe winding method of the present invention, Figure 2 is a view taken along the line X--X in Figure 1, and Figure 3 is a FIG. 4 is a schematic diagram for explaining a conventional tube winding method.

10... Winding drum, 20... Flattening device, 30...
... Drive drum, P... tube.

that's all

Claims (1)

[Scope of Claims] 1. A method for winding a tube in which tubes are wound around a winding drum in multiple stages in a state lined up in the axial direction of the winding drum, the tube being wound onto the winding drum. , a step of deforming the tube so that it is flattened in a direction perpendicular to the radial direction of the winding drum, and placing the deformed tube on the winding drum in a line in a predetermined direction along the axial direction of the winding drum. a step of winding the tubes while arranging them in the winding drum; a step of wrapping the cushioning material around the outside of the tubes arranged in a row along the axial direction on the winding drum; A method for winding a tube, comprising the steps of: winding the tube in a line in a direction opposite to the winding direction along the axis of the winding drum;