JP2000025115A - Tube fusion-jointing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tube fusion-jointing device which permits the easy fusion- joint of both thermoplastic resin tubes at any accurate angle and prevents variations in the joint strength from occurring. SOLUTION: In a tube fusion-jointing device, a pair of clamps 1 facing to one another holding the edge portions of thermoplastic resin tubes, the edge portions of each tube are heated and melt by a heater, both of the melt edges are confronted, thereby jointing and fusing them. The clamps 1 holding the edge portions of the tubes are rotatably provided, so as to fusion-joint them with the edge portions of each tube at any angle.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe fusion bonding apparatus suitable for use in joining ends of a pair of thermoplastic resin pipes at a desired angle.

[0002]

2. Description of the Related Art Conventionally, for example, Japanese Unexamined Patent Application Publication No.
As described in Japanese Patent Application Laid-Open Publication No. H10-209, there is known an apparatus in which an end surface of a thermoplastic resin tube is heated until it is melted by contacting the end surface with a heater, and then the end surfaces of the melted tube are butt-bonded with each other at a predetermined pressure and fusion-bonded. Have been.

[0003]

However, in the above-mentioned conventional pipe fusion bonding apparatus, a clamp for gripping the end of the thermoplastic resin pipe is fixed by bolts or the like.
When connecting a pair of pipes to form a straight pipe, there is no problem, but when connecting a pair of pipes at an angle to each other to form a bent pipe, it is not easy.

That is, when a pair of pipes are joined at an angle to each other to form a bent pipe, a fixed clamp is removed, and a bolt hole for fixing the clamp is provided to fix the clamp at an arbitrary angle. Drilled and temporarily fixed, butted the ends of the pipes whose end faces were cut at an arbitrary angle in advance,
Since the clamp was fixed while checking the angle between the two tubes by eyesight, errors in the angle between the two tubes were inevitable, and it was not possible to fuse and join bent tubes that crossed at an accurate angle, and the joint strength However, there was a problem that variation occurred.

[0005] Such a problem is particularly remarkable in the case of fusion bonding of large-diameter pipes. The man-hour required for setting a clamp is, for example, in the case of a pipe having a diameter of 300 mm, in removing and temporarily fixing the clamp. It took an average of 10 minutes, 3 minutes for checking the clamp angle, and 2 minutes for fixing the clamp, for a total of 15 minutes, occupying 75% of the total man-hours of the fusion bonding, resulting in poor productivity.

The present invention has been made in view of the above-mentioned problems in the conventional pipe fusion bonding apparatus, and an object thereof is to solve the problems in the conventional pipe fusion bonding apparatus. It is another object of the present invention to provide a tube fusion bonding apparatus which can easily fuse and bond thermoplastic resin tubes at an arbitrary accurate angle and which does not cause a variation in bonding strength.

[0007]

In order to achieve the above object, in a fusion bonding apparatus according to the present invention, an end of a thermoplastic resin tube is held by a pair of clamps facing each other, In a tube fusion splicing apparatus that heats and fuses an end of a tube with a heater and abuts and fuses the fused ends, a clamp for gripping the end of the tube is rotatably provided at an arbitrary angle. It is characterized in that the ends of each tube can be gripped and fused.

According to a second aspect of the present invention, there is provided a fusion splicing apparatus according to the first aspect, wherein the clamp can be fixed at an arbitrary angle.

According to a third aspect of the present invention, there is provided a fusion splicing apparatus according to the first or second aspect.
A clamp is provided on the mounting base, and a reference line for setting a rotation angle of the clamp is provided on the mounting base.

In the fusion bonding apparatus according to the first aspect of the present invention, since the clamp for gripping the end of the tube is rotatably provided, the end of each tube can be fixed at an arbitrary angle. It can be held and fused.

According to the second aspect of the present invention, since the clamp can be fixed at an arbitrary angle, after fixing the clamp at an arbitrary angle, the end of the tube is connected to the clamp. By holding the pipes, the pipes can be fusion bonded at an arbitrary angle.

According to the third aspect of the present invention, the clamp is provided on the mounting base, and the mounting base is provided with a reference line for setting the rotation angle of the clamp. The rotation angle of the clamp can be set by the reference line, the rotation angle of the clamp can be made accurate, and the tubes can be fused and joined at an accurate angle.

[0013]

FIG. 1 is a perspective view showing an example of a tube fusion splicing apparatus according to the present invention, and FIG. 2 is a plan view of the tube fusion splicing apparatus according to the present invention shown in FIG. In FIGS. 1 and 2, reference numerals 1 and 1 denote a pair of clamps provided to face each other. The clamp 1 includes a receiving member 11 and a stopper member 13 connected by a hinge 12. It is configured to be grippable. Clamp liners 111 and 13 corresponding to the size of the thermoplastic resin tube are provided on the receiving member 11 and the stopper member 13.
1 is fitted.

The receiving member 11 is provided at one end of a clamp base 14, a shaft 15 is suspended from the clamp base 14, the shaft 15 is inserted through a shaft hole formed in the mounting base 2, and the clamp base 14 is mounted. It is mounted rotatably on the table 2.

An arc-shaped groove 16 is provided in the clamp base 14, a bolt 21 protruding from the mounting base 2 is inserted into the arc-shaped groove 16, and a nut 22 is fastened to the tip of the bolt 21, so that the mounting base is 2, the clamp base 14 can be fixed.

As shown in FIGS. 2 and 3, when the nut 22 screwed into the bolt 21 is loosened, the clamp base 14 can be turned by an angle α = 15 degrees from a state where the clamp bases 14 are opposed to each other.

Reference numeral 23 denotes a reference line provided at a position where the angle β = 11.25 degrees, and the reference line 23 is displayed on the mounting base 2. Reference numeral 24 denotes a boundary line displayed on the mounting table 2.

Next, an embodiment of manufacturing a bent tube using the tube fusion bonding apparatus of the present invention shown in FIGS. 1 to 3 will be described with reference to FIGS. As shown in FIG. 4, the clamps 1 and 1 are rotated to the limit, and the thermoplastic resin pipe P is
1. Hold the end of P2. One end of the pipe P1 is cut diagonally, and the other end of the pipe P2 is cut diagonally. The ends of the tubes P1 and P2 are held by the clamps 1 and 1 so that the oblique ends are opposed to each other.

First, after the chamfering machine (not shown) chamfers between the slanted ends of the pipes P1 and P2, as shown in FIG.
By inserting the hot plate 3, the oblique ends of the tubes P1 and P2 are heated and melted.

Next, as shown in FIG. 6, the hot plate 3 is retracted from between the two tubes P1 and P2, and the end faces of the tubes P1 and P2 are butted and welded. Next, a diagonally cut one end of another pipe P3, only one end of which is cut obliquely, is fusion-bonded to the other end of the pipe P2 whose both ends are cut obliquely by the same operation. , P3 can be manufactured at an angle γ = 90 degrees between the center axes. The angle setting time is 1 minute, the chamfering time is 1 minute, the joining process is 4 minutes, the work can be completed in a total of 6 minutes, and finally the bending between the central axes of the pipes P1 and P3 at both ends is bent at 90 °. It took 16 minutes to manufacture the tubing, which was reduced to less than half the time required with conventional equipment.

Using the tube fusion bonding apparatus of the present invention shown in FIGS. 1 to 3, the clamps 1 and 1 are rotated to a reference line 23 instead of being rotated to the limit, and the pipes P1 and P3 at both ends are similarly operated. Can be manufactured at an angle [gamma] of 135 degrees between the center axes.

A not-shown chamfering machine and the hot plate 3 can be moved forward and backward on a boundary line 24 of the mounting table 2.

Although the embodiments of the present invention have been described in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and there may be design changes and the like without departing from the gist of the present invention. This is also included in the present invention.

For example, the rotation of the clamp is not limited to manual operation, but may be automatically performed by a driving device such as a motor. Similarly, the chamfering machine and the hot plate 3 are not limited to manual operation, but may be automatically operated by a device such as a motor or an air cylinder.

Further, by changing the range of rotation of the clamp, it is possible to manufacture a bent tube having an angle between the center axes of the tubes of 90 ° and 135 ° as well as other angles.

[0026]

According to the first aspect of the present invention, since the clamp for gripping the end of the pipe is provided rotatably, the end of each pipe is gripped at an arbitrary angle. And can be easily fusion-bonded.

In the fusion bonding apparatus according to the second aspect of the present invention, since the clamp can be fixed at an arbitrary angle, after fixing the clamp at an arbitrary angle, the end of the tube is attached to the clamp. By holding the pipes, the pipes can be easily fusion bonded at any angle.

According to the third aspect of the present invention, the clamp is provided on the mounting base, and the mounting base is provided with a reference line for setting the rotation angle of the clamp. The rotation angle of the clamp can be set by the reference line, the rotation angle of the clamp can be made accurate, and the pipes can be easily fusion-bonded at an accurate angle.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a tube fusion bonding apparatus according to the present invention.

FIG. 2 is a plan view of the tube fusion bonding apparatus shown in FIG.

FIG. 3 is a plan view showing a state where a clamp of the tube fusion splicing apparatus shown in FIGS.

FIG. 4 is a plan view showing a use mode of the tube fusion bonding apparatus shown in FIGS.

FIG. 5 is a plan view showing the next step of the mode of use of the tube fusion bonding apparatus shown in FIG. 4;

FIG. 6 is a plan view showing the next step of the mode of use of the tube fusion bonding apparatus shown in FIG. 5;

FIG. 7 is a plan view showing the next step of the mode of use of the tube fusion bonding apparatus shown in FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Clamp 11 Receiving member 111 Clamp liner 12 Hinge 13 Stopping member 131 Clamp liner 14 Clamp base 15 Axis 16 Arc-shaped groove 2 Mounting base 21 Bolt 22 Nut 3 Hot plate P1, P2, P3 Thermoplastic resin tube P Bent tube

Claims (3)

[Claims] 1. A tube fusion method in which the ends of a thermoplastic resin tube are gripped by a pair of clamps facing each other, the ends of each tube are heated and melted by a heater, and the melted ends are joined to each other and joined and fused. In a joining apparatus, a clamp for gripping an end of a pipe is rotatably provided, and an end of each pipe can be gripped and welded at an arbitrary angle. 2. The apparatus according to claim 1, wherein the clamp can be fixed at an arbitrary angle. 3. The apparatus according to claim 1, wherein the clamp is provided on the mount, and a reference line for setting a rotation angle of the clamp is provided on the mount. .