JPS6219992B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an end face processing tool for flexible pipes.

Conventionally, there is no processing tool that can efficiently and accurately crush the end face of a flexible pipe to form a sealing surface.
It was necessary to tighten the C-shaped ring in order to prevent cracks near the end when connecting it to the cylinder, but it was considered impossible to easily and quickly perform this tightening work at the work site. Ta.

The present invention has been made in view of these points, and allows the tightening work of the above-mentioned C-shaped ring and the work of crushing the seal surface to be carried out efficiently and continuously using a single working tool, and it is possible for skilled workers to perform The purpose is to enable beautiful and accurate end face processing at work sites without the need for.

Hereinafter, the present invention will be explained in detail based on illustrated embodiments.

1 is a flexible pipe used as piping for water supply, hot water supply, etc., and has a bellows-shaped peak 2...
and valleys 3 are formed alternately. The material generally used is metal such as stainless steel. The flexible pipe end surface processing tool 4 for processing this includes a pipe holder 5 and an end surface pressing tool 6 for crushing the processed end surface 1a of the flexible pipe 1.

The pipe holder 5 has a pivot shaft 7 and two clamping halves 8, 8 which are pivotally connected to each other so as to be able to swing open and close as shown by the solid line and the imaginary line in FIG. A respective gripping rod 9 projects outwardly from the gripping halves 8 . The holding half 8 has a rectangular parallelepiped shape, and is provided with a machined recess 10 having a semicircular cross-sectional shape. The processed recess 10 has a plurality of grooves 11 formed in the center thereof in the axial direction. In the examples shown in FIGS. 2 and 3, two are complete grooves and one is a half, so that a total of two and a half grooves are formed. Then, the peak portion 2 of the flexible pipe 1 is fitted into the groove 11 as shown in FIG. 3. Of course, in FIG. 3, only the half circumference of the ridge 2 is fitted into the groove 11, but if the clamping halves 8, 8 are closed by swinging around the pivot shaft 7, the ridge 2 The entire circumference of the shaft is fitted into the groove 11, and movement in the axial direction is completely stopped.

In addition, female screw portions 12 and 13 are formed at both ends of the machining recess 10 in the axial direction, and when the clamping halves 8 and 8 are closed by swinging around the pivot shaft 7, a continuous spiral screw groove is formed. Engraved screw holes are formed (first and fifth
condition). In the examples of FIGS. 2 and 3, the lower end of the upper female threaded portion 12 and the groove 11...
A stepped part 14 for ring tightening and a large-diameter relief part 15 are formed between the half-groove part at the upper end, and on the other hand, the upper end part of the lower female screw part 13 and the groove 11 are formed. There is no stepped part for tightening the ring in between, and only a large diameter relief part 15 is formed.

As shown in FIG.
It is loosely fitted into, for example, the second or third valley part 3 from a, and is fitted into the ring tightening stepped part 14 as shown in FIG. Next, as shown in FIG. 4, by holding the gripping rods 9, 9 in your hands and swinging the clamping halves 8, 8 closed, the C-shaped ring 16 will be deformed in the direction of decreasing diameter as shown by arrow A. , the state shown in FIGS. 6 and 5 is reached, and the flexible pipe 1 is fastened to the outer circumferential surface of the flexible pipe 1.

By the way, as mentioned above, the end face pressing tool 6 is attached to the female screw portions 12, 12 or 1 of the clamping halves 8, 8 in the closed state.
3 and 13;
8 and a lever body 19 inserted into and attached to a through-hole in a direction perpendicular to the axis of the lever 8. Lever body 1
9 projects from the pressing body 18, and when it is grasped with one hand and rotated as shown in FIG. The processed end surface 1a of the flexible pipe 1 held by the concave grooves 11 of the clamping halves 8, 8.
can be crushed. That is, the contact surface 20 of the pressing body 18 directly contacts the processed end surface 1a.
As shown in FIG. 7, when the clamping halves 8, 8 are then opened, the desired (for example) two to three peaks 2 of the processed end surface 1a are flattened. It is crushed to form a sealing surface. The male threaded portion 17 can be easily and quickly removed from the clamping halves 8, 8 in the open state.

FIG. 9 shows an example of the use of the flexible pipe 1 whose end face has been processed in this way,
After the cap nut 21 is fitted onto the pipe 1 in advance, the end face is processed as described above, and when the cap nut 21 is tightened to the male threaded portion 23 of the joint portion 22, the cap nut 21 is crushed and becomes flat and has a large diameter. Outer flange for seal 2
4 is pressed evenly around the entire circumference by a cap nut 21 via a C-shaped ring 16, and the seal member 25 is pressed against the joint part 2.
The two end faces are crimped to provide sealing. Moreover,
Since the outer flange 24 is pressed evenly around the entire circumference through the C-shaped ring 16, cracks do not occur near the outer flange 24 even when the flexible pipe 1 is suddenly curved with a small radius of curvature. There are advantages.

Note that there is no stepped part 14 for ring tightening on the other female threaded part 13 side, and only the escape part 15 when the outer flange part 24 is formed is recessed, but this female threaded part 13 The side to use is C as shown in Figure 8.
This is a case of end face processing without a die ring. In other words, depending on the type and size of the joint, there are cases where the C-type ring is not used, and in that case, the other female threaded part 1
3 may be used. In this manner, in the embodiments shown in FIGS. 1 to 8, one tool can be conveniently used both when the C-shaped ring 16 is used and when it is not used.

Next, as shown in FIG. 10, when ring tightening stepped portions 14, 14 are formed at both ends of the groove 11, there is an advantage that the life of the tool is doubled. In other words, the parts that wear out the earliest are generally
This is because the stepped portion 14 and the stepped boundary surface portion between the stepped portion 14 and the relief portion 15 are provided in two locations, one above the other. In addition, when there are two relief parts 15, 15 as shown in FIG. 10, the life of an end face processing tool that does not use a C-shaped ring is twice as long as when there is one relief part.

The present invention effectively achieves the intended purpose with the above-described configuration, and the C-shaped ring 16 can be easily tightened by holding the gripping rods 9, 9 by hand and closing the clamping halves 8, 8. Moreover, the crushing of the end face 1a can be carried out continuously following the above-mentioned tightening operation by holding and rotating the lever body 19 by hand, thereby achieving a remarkable improvement in working efficiency. Moreover, even if the flexible pipe 1 is long, it is possible to process the end face on site without requiring any skill, which greatly contributes to expanding the range of applications of long flexible pipes and making piping work easier. be. Further, by securely fastening the C-shaped ring 16, even when the flexible pipe 1 is bent with a small radius of curvature, cracks do not form near the end face 1a, and leakage of fluid to the outside can be effectively prevented. Furthermore, since the clamping halves 8, 8 can be opened and closed freely, the male threaded portion 17
is screwed into the inner part of the female threaded parts 12, 13, and then the clamping halves 8, 8 are closed, the contact surface 20 is pressed into contact with the end surface 1a to be processed by a few rotations, and the work can be done even more quickly. . Further, when removing the pressing body 18 and the processed flexible pipe 1 from the processed recess 10, it can be quickly done by swinging the holding halves 8, 8 open.

[Brief explanation of the drawing]

Figure 1 is a side view showing one embodiment of the present invention, Figure 2 is a side view showing one embodiment of the present invention;
The figure is a plan view of the open state, Fig. 3 is a plan view of the state immediately before processing, Figs. 4, 5, and 6 are partial cross-sectional side views of the state in the middle of processing, and Fig. 7 is the state immediately after processing. Fig. 8 is a plan view of the state immediately after processing showing another method of use, Fig. 9 is a partially sectional side view showing an example of how to use the flexible pipe, and Fig. 10 shows another specific example. FIG. 1...Flexible pipe, 2...Mountain part, 5...
... Pipe holder, 6 ... End face presser, 7 ... Pivot shaft, 8 ... Clamping half, 9 ... Gripping rod, 10 ... Machining recess, 11 ... Concave groove, 12, 13 ... Female threaded part, 14...Stepped part, 16...C-shaped ring, 17
...Male thread part, 18...Press body, 19...Lever body, 1a...End surface to be processed.

Claims (1)

[Claims] 1. Consists of a pipe holder 5 that holds the flexible pipe 1, and an end face presser 6 that crushes the processed end surface 1a of the flexible pipe 1 held by the pipe holder 5, the pipe holder The tool 5 has clamping halves 8, 8 which are pivotally connected to each other by a pivot shaft 7 so as to be able to swing open and close. A machined recess 10 having a semicircular shape is provided, and the machined recess 10 has a plurality of grooves 11 in the central part of the flexible pipe 1 into which the peaks 2 of the flexible pipe 1 are fitted. . . . is recessed, and female threaded portions 12 and 13 are formed at both end portions in the axial direction, and at least one side of the portion between the female threaded portion 12 and the groove 11 . is stepped part 1 for ring tightening
4 is recessed, and a C-shaped ring 16 is fitted into the stepped portion 14 so that when the clamping halves 8, 8 are closed, the ring 16 is fastened to the outer peripheral surface of the flexible pipe 1. The end face pressing tool 6 is a pressing body having a male threaded portion 17 that is screwed into a female threaded hole formed by the female threaded portions 12, 12, 13, 13 of the clamping halves 8, 8 in the closed state. 18, and a lever body 19 attached in a protruding manner from the pressing body 18. Processed end surface 1a
An end face processing tool for a flexible pipe, characterized in that it is configured to be crushed by the spiral movement of the pressing body 18.