JPS58197019A - Connection of synthetic resin made pipe - Google Patents

Abstract

PURPOSE:To connect a synthetic resin made sleeve and a synthetic resin made pipe surely, by holding the sleeve to enable to move a minute distance in a radial direction with a holding jig and doing smoothly a press fitting operation of a pipe end into a sleeve hole. CONSTITUTION:A synthetic resin made sleeve 1 and a synthetic resin made pipe 2 are respectively held by holding jigs 3, 4. Then, after the inner peripheral face of the sleeve and the outer peripheral face of the end of the pipe 2 is heat softened, the pipe 2 end is pressed into the hole of the sleeve 1 and held for a while. The sleeve 1 is held by the holding jig 3 enabling to move a minute distance in a radial direction and is moved in the radial direction according to the eccentricity of the pipe 2 end and a press insertion operation is performed smoothly.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of connecting synthetic 11 resin bifs using a synthetic resin shank joint.

As a method for connecting synthetic resin pipes using adhesive, a heat fusion method as shown in FIGS. 1 and 2 is known.

That is, as shown in FIG.
After attaching the synthetic resin sleeve 2' and the synthetic resin sleeve end 3' to the sleeve 2' and the recess 12' and heating for a predetermined period of time, the sleeve 2' and the sleeve end 13' are attached from the flock 1'. Pull it out and quickly remove it as shown in Figure 2.
The connection work is completed by inserting the pipe end 3' into the nozzle 2'.Currently, there is no established method for connecting a dog-sized pipe using a connecting device. It is essential that the process be completed in a short time while the connection part is softening (not cooling down).

The present invention includes a synthetic machine side joint and a synthetic resin joint.

This paper proposes a method to reliably connect these in a short time using a connecting device, in which the ends of the synthetic sanitary gourd joints and plywood resin fibers to be connected are each held with a holding jig. , the inner circumferential surface of the joint "fL" and the outer circumferential surface of the end of the pipe are respectively heated and softened, and then at least one of the two holding jigs is moved to the mating jig iM by a driving means. By this means, when the end of the pipe is press-fitted into the hole of the joint, the joint is held movable over a small distance in the radial direction.The present invention will be explained below with reference to the drawings.

Figures 3 and 4 are a plan view and a front view showing the state of use of an embodiment of a connecting device conveniently used in the method of connecting synthetic side oil membrane pipes according to the present invention, and Figure 5 is the same as that of Figure 4. View A-
6 is a sectional view taken along the line BB in FIG. 5. In the figure, 1 and 2 are the ends of a synthetic resin sleeve and a synthetic resin pipe to be connected, respectively, and are held by holding jigs 3 and 4, respectively. The holding jig 3 holding the sleeve side consists of a plate-shaped base body 32 and a lid body 33, which are divided in half by the holding hole 31. Half-split spacer collar 34.3 used according to the size of the joint applied to the sleeve 1 as shown in Figure 6
It is held through 5. The inner diameter of the inner peripheral surface 36 of the spacer collar is slightly thicker than the outer diameter of the sleeve 1,
In the holding jig 3, the sleeve 1 is slightly
”・It is possible to move a distance. Reference numeral 11, 1.2 denotes a tape layer formed by wrapping an adhesive tape around the outer peripheral surface of the sleeve 1, and restricts movement of the sleeve 1 in the axial direction. The holding jig 4 that holds the end side of the pipe consists of a plate-shaped base 42 and a lid 43, and the end 82 of the pipe is held in the radial direction via half spacer collars 44 and 45. It is held so that it does not move. 21 and 22 are tape wrapping layers that restrict movement of the pipe 2 in the axial direction. 51
．． Reference numeral 52 denotes kite rods arranged parallel to each other and parallel to the axes of the pipe and the joint, and connects the base 42 that holds the end of the pipe and the plate-shaped base 6 arranged parallel thereto. are doing. Reference numeral 7 designates an air cylinder, which is fixed perpendicularly to the surface of the base 6, and a biston end 71 is fixed to the lower central part of the base 32 that holds the sleeve. 8 is a switching valve. No. 9 on the extension side of air/linder 7, holding jig that holds the sleeve; 3 (size, host part 321 and 322, respectively, Kai M Wei 5), kited by 52 and moves left and right .

The bonding method according to the present invention will be explained below.

After forming the tape-wrapped layer 11 by wrapping adhesive tape around a desired location on the outer circumferential surface of the sleeve, the sleeve 1 is held by spacer collars 34 and 35 to hold the base body 32 of the storage jig. Place it on a drying rack L31 and knead! [Close the lid 33, fix the lid 33 to the base 32 with bolts 37 and 38, and then attach the spacer collar 34 and 35.
A tape wrapping layer 12 is formed at a position sandwiching the tape. on the other hand,
The end 2 of the pipe is also covered with a sleeve (same as ttl+,
It is held by a holding jig 4. Next, the heater flock heated to a predetermined temperature is heated to the sleeve 1 and the end 2 of the pipe.
By switching the switching valve 8 and pushing the piston of the linter 7 to the right, the holding jig 3 of the sleeve 1, which is holding the sleeve 1, is screwed to the right, as shown in Fig. 1. This state is maintained for a predetermined period of time, and the inner circumferential surface of the hole on the right side of the sleeve j and the outer circumferential surface of the end portion 2 of the pipe are heated and softened. Next, switch the switching valve 8, move the piston of the cylinder 7 to the left, and pull out the heater block from the sleeve and the end of the pipe. In this case, the end of the pipe, which has a smaller volume than the fitting, will heat up faster, so
It is necessary to pull it out earlier than the sleeve side. Thereafter, the switching valve 8 is switched, the piston of the nolinder 7 is moved to the right, the end 2 of the pipe is press-fitted into the hole of the sleeve 1 as shown in Fig. 2, and held for a while, and the connection (d Complete.

In general, synthetic resin pipes are more easily deformed than iron pipes. For example, long pipes are stored rolled up on drums, so they inevitably have bending dents, and the holding jig at the end of the pipe cannot be used. The axis of the hole and the axis of the tip of the held pipe do not necessarily coincide.

In the present invention, since the sleeve 7 is held by the holding jig portion so as to be able to move a minute distance in the radial direction, there is room for the sleeve to be moved in the radial direction according to the deviation L of the end of the pipe. This makes it possible to perform press-in cropping very smoothly. (Factor 6: In the butt connection commonly used for synthetic resin pipes, the axes of the pipes must be aligned accurately, so the pipes are held and connected so that they do not move.) Deformation on the pipe side If it is large, the pipe side should be held in the same way as the sleeve side, and the fit should be fine so that the pipe side can also move. Tape-wrapped layers 11.12 and 21.2
2 serves as a stopper to prevent the sleeve i and the end 2 of the pipe from being pulled out from the holding part in the axial direction. Of course, if you have a large diameter section, you can use that instead.

Also, in order to prevent the sleeve 1 from moving to the left 11+,
A stopper bracket may be provided that extends from the base body 32 and contacts the left end of the sleeve 1. As a joint, in addition to a sleeve, an elbow, a cheese, etc. can be used. If the pipe is short, the holding position of the joint and the pipe may be reversed to that shown in Fig. 3, and the pipe side may be moved. Third
For the movement + stage of the sleeve holding jig shown in the figure, various methods such as an air lifter or a giset motor can be used. Note that the present invention also applies to simple heat fusion as described above.
It is also useful in the case of heat-sealing with adhesive applied (in the case of crosslinked polyolefin pipes).

As explained above, the method for connecting synthetic resin pipes according to the present invention, when connecting easily deformable synthetic resin pipes using a connecting device, holds the joint so that it can be moved a small distance in the radial direction. This makes it possible to press-fit the end of the pipe into the joint hole extremely smoothly, and the connection work can be completed reliably in a short period of time, which is of high practical value.

[Brief explanation of drawings]

1 and 2 are front cross-sectional views of a device for explaining a conventional connection method, FIGS. 3 and 4 are a plan view and a front view of a device for explaining a connection method according to the present invention, and FIG. 5 is a front sectional view of a device for explaining a conventional connection method. 4 is a cross-sectional view taken along the line A-A in FIG. 0, and a cross-sectional view taken along the line B-B in FIG. 5; FIG. In the figure, the toss leaf, 2-- the end of the pipe, 3.
4.Holding jig, 51.52.Kite rod, 6.Base, 7.Air/female cylinder 18.Switching valve. Patent applicant: Dainichi Nippon Electric Cable Co., Ltd. Representative Director: Yukio Aoyama 99

Claims (1)

[Claims] Hold the synthetic resin joint to be connected and the end of the synthetic side resin vibrator with a holding jig, heat and soften the inner peripheral surface of the hole of the joint and the outer peripheral surface of the end of the pipe, respectively, Thereafter, at least one of the two holding jigs is moved toward the pipe jig by a driving means, and the end of the pipe is press-fitted into the hole of the joint, and the diameter of the joint is reduced. A method for connecting synthetic frame-side pipes, characterized in that the pipes are held in such a way that they can be moved a small distance in the direction.