JPS5968209A - Manufacture of joint pipe - Google Patents

Abstract

PURPOSE:To make easily a joint pipe of the type of snap fit, by forcing a metal joint auxiliary pipe into an opening at the end of a plastic pipe while ultrasonic wave are being applied. CONSTITUTION:A diametrally reduced attaching section 6 of the auxiliary pipe 2 is fitted to the upward end opening of the pipe main body 1 fixed to a jig, and is pressed by a tool horn 5. By this pressing, the anchoring flange section 4 is anchored to an opening periphery 7 of the pipe main body 1. Pressing is further carried out by the tool horn 5 so that the anchoring flange section 4 enlarges forcibly the pipe main body 1 and fits therein. In this case, when ultrsonic waves are applied to the tool horn 5, the ultrasonic waves are transmitted to the auxiliary pipe 2, and the anchoring flange section 4 causes the inner surface of the pipe main body 1 to be softened and fits to the pipe main body 1. Thus, a joint pipe that has no anchoring recess therein can be easily obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a joint 1 to pipe used in various gas and liquid piping, which is a composite of a plastic joint 1 to a pipe body and a metal join 1 to an auxiliary pipe. , More specifically, a metal joint L-? which becomes the connection end with the pipe to be joined 1 to 1 is placed in the end of the plastic joint pipe body. Insert and remove the ili auxiliary pipe 1
In the method of manufacturing a pipe, join 1 to join 1, which is a metal joint 1 integrally provided with a ring-shaped locking collar on the outer circumferential surface near the end. Press fit the ultrasonic transmitting bias into the gap 1 while holding the
This invention relates to a method of manufacturing a joint 1 to a pipe characterized in that the locking collar part is engaged by biting into the inner surface of a softened joint pipe body to perform the mounting process.

To attach a metal joint auxiliary pipe to a pipe body (conventional plastic joint), generally an auxiliary pipe with an outer diameter approximately equal to the inner diameter of the joint 1 to the pipe body is press-fitted and fixed (press 1 to fit l- ). However, with this method, stress relaxation occurs on the plastic joint 1 to the pipe body side after a long period of time, and the holding force of the auxiliary pipe weakens over time, or if the stress is large, stress relaxation occurs over time. There is a risk of creep failure occurring. In contrast to this method, a ring-shaped lock J! is attached to the inner peripheral surface of the end of the pipe body to join 1! ! 1 part is 8Q, and the auxiliary pipe is placed on the outer circumferential surface of the auxiliary pipe on the four locking parts. However, in this method, the auxiliary tube is removed (the one that is press-fitted during press-fitting), and stress does not occur as in the presses 1 to 1- mentioned above. However, in this method, as mentioned above, It is necessary to provide an annular locking recess on the inner peripheral surface of the end of the joint 1 to the pipe body, and it is extremely difficult to create this locking recess when forming the joint pipe body. This method is difficult to manufacture and requires a large amount of money for molds, etc.

This invention has been made to solve the above-mentioned problems, and in order to utilize ultra-n waves, locking recesses are provided on the inner circumferential surface of the joints 1 to 9 of the tube body. Moreover, as a product, a joint tube of the above-mentioned Snap Fit 1 form can be obtained without any problems.

The M manufacturing method of this invention will be explained below with reference to the drawings.

In Figure 1, (1) is plastic join 1.
~Pipe body C has a bent pipe (elbow) shape, and there is a metal joint 1 in one end that becomes the connection end with the jointed pipe.
The auxiliary pipe (2) is inserted into the hole and the angle is cut.

Insertion of the auxiliary pipe (2) (=j After the Gxl, the pipe body (
There is a connection screw (3) on the outer circumferential surface of the part that protrudes from 1).
is installed, and then a small diameter piece is inserted and removed (iJ tJ
A ring-shaped locking collar (4) with an acute angle at the tip is integrally installed on the outer circumferential surface of the portion. (5) is designed to prevent the auxiliary pipe (2) from being press-fitted into the pipe body (1).
2) This is a tool bone used to press the upper end.

First, in manufacturing, the tube body (1) is fixed on a jig (not shown) in the state shown in the figure. In this state, the C tube body (
1) To attach the small diameter of the auxiliary pipe (2) to the upwardly facing end opening, align the part (6) and apply pressure 7 with the tool horn (4).
Ru. By applying pressure, the tube body (
The latching collar portion (4) is in a state of being latched to the opening edge (7) of 1). Furthermore, the locking collar part (4), which is not pressurized by the tool bone (4), is inserted while expanding the tube body (1), and at that point, the tool horn (4) is energized to emit ultrasonic waves. When this ultrasonic wave is transmitted to the auxiliary tube (2), the locking collar (4) softens the inner surface of the tube body (1), bites into the tube body (1), and locks the tube as shown in FIG. Na a3
, rli #I to energize the tool horn (4) to transmit ultrasonic waves
C, auxiliary f2 (21ka8rI2 as shown in the figure)
Since the effect is sufficiently exerted even if the distance is just a short distance before reaching the position iN, conversely, the ultrasonic transmission bias is applied between the ends of the tube body (1) to ) take (q
It is also a good idea to carry out part (6) from the initial stage of matching. Then, with J3 in the state shown in Figure 2, the auxiliary pipe (
The vicinity of the tip of 2) is deformed by pressing the gasket (8).

After cold nI, what is the tube main body (1) and the auxiliary tube (2) surface? III 11+2 L,, J, Patsuni Vn (6
) according to 1? Although the rubbing and fixing force works, if a certain force or more is applied, the auxiliary tube (2) will rotate relative to the joint tube body (the moon). This is because the flange (4) is continuous in a ring shape, and if it is rotatable in this way, if the tube body (1) has a bent tube shape as in the above embodiment, it will be difficult to connect the tube body (1). The tube body (1) can be rotated in the direction of the joint tube to match it, and even if the tube body (1) is straight, if the jointed tube to be connected is of a fixed configuration, the auxiliary tube (
2) is convenient because it can be connected while rotating. 3, 4 and 5 respectively show other embodiments of the joint tube obtained according to the present invention, in which the end of the tube to which the auxiliary tube (2) is not attached is provided with cholera l-( '710,11■ is equipped.

The one shown in FIG. 3 shows another embodiment of a bent tubular shape.
The ones shown in Figures 4 and 5 are T-shaped and have auxiliary g(2) at different ends.

J3, in the above drawing, the pipe body (1
) Although no auxiliary pipe is attached to the other end, of course/
ν It is also possible to attach the auxiliary pipes (2) to both ends to obtain a joint.

The shape of the tip of the locking collar (4) is shown in Figures 6 and 7.
Although it may be as shown in the figure, it is better to have an acute angle like the one shown in Figs. The contact surface can be softened well, and the locking function can also be satisfactorily achieved. The plastic tube body and auxiliary tube used in the examples are shown below.

a. Joint pipe main body metal joint 1 to auxiliary pipe intake q () Diameter of main end portion 13. Q5'v++ Same external shape 16.0On+m Material Polyaretal 1), Metallic joint 1 - Auxiliary pipe hanging collar outer diameter 13.90mm Rim vertex angle 26° Material Joy below brass > h Metal to tube body The installation of the joint auxiliary tube is an example of implementation conditions.

a. Use a tool bone with an effective pressure of 113 kQ, ■Culm 0.5 seconds after the start of press-in, transmit ultrasonic waves for 0.2 seconds (5.4 amp x 200V). Do this in J3.

Metal join 1 by tool bone for 0.4 seconds
~After holding the auxiliary tube, connect the tool horn to 3FA.

This invention is constructed as described above, and according to the manufacturing method of the invention, a metal joint auxiliary pipe is installed in the joint 1 to the pipe main body as a product without installing a locking recess in the joint pipe main body. A joint tube mounted in snapite form is very easy to obtain.

[Brief explanation of drawings]

1 and 2 are longitudinal cross-sectional views showing the manufacturing method of the present invention, FIGS. 3 to 5 are partially cutaway cross-sectional front views of other embodiments of the joint 1 pipe obtained by the present invention, and FIG. 7 are front views of other embodiments of the locking flange portion of the present invention. (1)...Joint pipe body (2)...Metallic joint 1-auxiliary pipe (4)・
・・Latching collar part (5)・・Tool horn representative Patent attorney Nobuo Nogawa Part 5 Figure 5

Claims (1)

[Scope of Claims] 1. A metal joint auxiliary pipe that will be the connection end with the joint 1 to the pipe to be joined is inserted into the end of the joint 1 to the pipe body made of Brass Dicks, and the joint 1 to the pipe is removed. In the manufacturing method, a ring-shaped locking collar is integrally formed on the outer peripheral surface near the C1 end. J3 1 in 1~ is characterized in that the locking brim part is softened by biting into the inner surface of the pipe body and is locked in a state of locking while performing the "I" force. Method of manufacturing tubes.