JP3059253U - Tube bending tool for corrugated stainless steel pipe - Google Patents

Abstract

(57) [Problem] To simplify a bending operation of a corrugated stainless steel pipe formed by a straight pipe part and a bendable bellows part. SOLUTION: On a lower surface 1b side of a seat plate portion 1 provided with a support pipe 2 on an upper surface 1a side, a tube holding portion 3 for detachably inserting a straight pipe portion 10b of a corrugated stainless steel pipe 10 is provided. The bellows portion 10a extending from the holding portion 3 is bent to a desired bending angle by the pressing of the bending portion 4 rotated by the inclination of the support pipe 2.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a pipe bending tool suitable for easily performing a bending operation on a corrugated stainless steel pipe formed by a straight pipe portion and a bendable bellows portion.

[0002]

[Prior art]

 In recent years, corrugated stainless steel with a bellows in a straight pipe has been developed because of its excellent corrosion resistance in piping such as water pipes, the elimination of connecting parts at bending points, and the advantage of excellent displacement absorption. Many steel pipes have been adopted.

[0003]

[Problems to be solved by the invention]

 When the bellows of a corrugated stainless steel pipe is bent as described above, it can be easily bent by hand if the pipe is small in diameter and thin, but it is easily used for water pipes such as nominal diameters 40 and 50. In the case of stainless steel pipes, the diameter becomes large, so manual bending work on site is troublesome.

The present invention has been made in view of such circumstances, and a purpose thereof is to simplify a bending operation of a corrugated stainless steel pipe formed by a straight pipe portion and a bendable bellows portion. The present invention relates to a tube bending tool that can be formed into a tube.

[0005]

[Means for Solving the Problems]

 In order to solve the above-mentioned problem, the present invention is a bending tool for bending a bellows portion of a wavy stainless steel pipe formed by a straight pipe portion and a bendable bellows portion. And a seat plate with a support pipe mounted vertically on the upper surface side, a bellows portion provided on the lower surface side of the seat plate portion and one end face abutting, and a straight pipe portion can be removably inserted. And a curved groove formed in the side surface of the seat plate portion that is continuous from one end surface of the tube body holding portion and curved in a 90 ° direction toward the upper surface of the seat plate portion to press the bellows portion. Thus, the bellows portion is formed to have a curved bent portion that bends at a desired angle.

According to a second aspect of the present invention, at least the seat plate portion, the tube holding portion, and the curved bent portion are formed of a lightweight rigid member such as a light aluminum material or a reinforced plastic material. And

[0007]

[Embodiment of the invention]

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view of a pipe bending tool for a wavy stainless steel pipe according to the present invention.

In the tube bending tool shown in FIG. 1, a support pipe 2 is vertically attached to an upper surface 1a of a plate-shaped seat plate 1 having a predetermined thickness. In the figure, one end of a support pipe 2 is screwed to the seat plate 1 via a nut 5 provided on the upper surface of the seat plate 1.

On the lower surface 1 b side of the seat plate 1, there is provided a tube holding portion 3 that allows the straight tube portion 10 b of the corrugated stainless steel tube 10 (see FIG. 2) to be inserted. The tube body holding portion 3 is fitted with the straight tube portion 10b so as to extend along the longitudinal direction of the upper surface 1a of the seat plate portion 1. That is, the opening portion 3b is provided so as to hold the support pipe 2 horizontally in an orthogonal relationship. A straight guide hole 3a having a U-shaped cross section is provided.

Further, one end face 3 c of the tubular body holding portion 3 on the side of the curved bent portion 4 is formed in a planar shape so that the bellows portion 10 a of the corrugated stainless steel pipe 10 abuts.

On the other hand, a curved bent portion 4 which is curved in a 90 ° direction from the one end surface 3c of the tube body holding portion 3 to the upper surface 1a of the seat plate portion 1 is provided on the side surface of the seat plate portion 1. ing. The curved bent portion 4 includes a substantially U-shaped curved guide groove 4a into which the bellows portion 10a is inserted, and curved side plates 4b formed on both sides of the curved guide groove 4a.

As described above, the curved guide groove 4a is connected to the one end surface 3c of the tubular body holding portion 3, and the curved side plate 4b is connected to the upper surface of the U-shaped straight guide hole 3a. A step is formed between the opening of the hole 3a and the curved guide groove 4a connected to the one end face 3c of the tube holding portion 3, and the step forms the tube holding portion 3 of the bellows portion 10a. On the other hand, contact with the end face 3c is enabled.

Further, the seat plate 1, the tube holding portion 2, and the curved bent portion 3 are formed of a lightweight rigid member such as a light aluminum material or a reinforced plastic material. The bending tool is lightweight, and the usability is improved. In addition, 3d is the bottom of the tube body holding portion 3 placed on the floor F.

Next, the bending of the corrugated stainless steel pipe 10 will be described. As shown in FIG. 2, the straight pipe portion 10b of the corrugated stainless steel pipe 10 is inserted into the straight guide hole 3a of the tube holding portion 3 through the opening 3b.

At this time, the outermost bellows portion 10 a of the corrugated stainless steel tube 10 is arranged so as to be joined to the one end surface 3 c of the tube holding portion 3. Then, as shown in FIG. 3, when the support pipe 2 is inclined rightward in the figure, the curved bent portion 4 of the tube holding portion 3 rotates clockwise in the figure.

As a result, the curved guide groove 4a of the curved bent portion 4 presses the bellows portion 10a, and the tube holding portion 3 rotates upward and to the left in the drawing, and the tube holding portion 3 The straight pipe portion 10b extending leftward in the drawing is bent upward and leftward in the drawing together with the bending of the pressed bellows portion 10a. In this case, the bending angle of the bellows portion 10 a is set by the inclination angle of the support pipe 2.

As described above, according to this embodiment, the straight pipe portion 10b of the corrugated stainless steel pipe 10 is removably inserted into the lower surface 1b side of the seat plate portion 1 provided with the support pipe 2 on the upper surface 1a side. The bellows portion 10a provided with the body holding portion 3 and abutting on the end face of the tube holding portion 3 and extending from the tube holding portion 3 is curved and bent by the inclination of the support pipe 2. It is pressed by the part 4 and bent to a desired bending angle.

Further, since at least the seat plate 1, the tube holding portion 2, and the curved bent portion 3 are formed of a lightweight and rigid member such as a light composite aluminum material or a reinforced plastic material, a tube bending tool is used. Is a lightweight tool, which improves usability on site.

[0019]

[Effect of the invention]

 As described above, according to the present invention, the bending operation of the corrugated stainless steel pipe formed by the straight pipe portion and the bendable bellows portion can be easily performed by the tilting operation of the support pipe. it can.

According to the second aspect of the present invention, the seat plate portion, the tube body holding portion, and the curved bent portion are formed of a lightweight rigid member such as a light aluminum material or a reinforced plastic material. The tube bending tool is light in weight and can improve usability.

[Brief description of the drawings]

FIG. 1 is a perspective view of a tube bending tool for a wavy stainless steel pipe according to the present invention.

FIG. 2 is an explanatory side view showing a state before bending a wavy stainless steel pipe by a pipe bending tool.

FIG. 3 is an explanatory side view showing a state after bending a wavy stainless steel pipe by a pipe bending tool.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Seat plate part 2 Support pipe 3 Tube holding part 3a Straight guide hole 4 Curved bent part 4a Curved guide groove

Claims (2)

[Utility model registration claims] 1. A bending tool for bending a bellows portion of a wavy stainless steel pipe formed by a straight pipe portion and a bendable bellows portion, the seat plate portion having a support pipe mounted vertically on an upper surface side, A bellows portion is provided on the lower surface side of the seat plate portion, the bellows portion is in contact with one end surface, and a straight tube portion is removably insertable, and a tube holding portion is connected from one end surface of the tube holding portion. A curved groove formed on the side surface of the seat plate portion and curved in the direction of 90 ° toward the upper surface of the seat plate portion comprises a curved bent portion that presses the bellows portion to bend the bellows portion to a desired angle. A pipe bending tool for a wavy stainless steel pipe, characterized by the following. 2. The wavy shape according to claim 1, wherein at least the seat plate portion, the tube body holding portion, and the curved bent portion are formed of a lightweight rigid member such as a light composite aluminum material or a reinforced plastic material. Tube bending tool for stainless steel pipes.