JPH106402A - Fusion welder for resin pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remove a heater automatically by a method wherein a slide bar is provided in a space provided at a middle of a fixed clamp and a movable clamp, the heater slide block is energized upward with a spring means, and further an engaging means of the heater slide block and its release means are provided. SOLUTION: This fusion welder for a resin pipe is composed of a fixed clamp 11, a movable clamp 12, and a heater support mechanism 13 which hold respectively resin pipes 10, 10'. A heater 20, a heater slide block 21, and a heater base 22 are provided to the heater support mechanism 13. Slide bars 25, 25' for the heater slide block are provided to the heater base 22. Then, the heater slide block 21 is pushed down against energized force of a gas spring 26, its hook pin 24 is inserted into a hole 27 of the heater base 22, and engaged therewith. Then, the heater base 22 is located between the fixed clamp 11 and the movable clamp 12 with centering mechanisms 32, 33, 34, a heater 20 is set, and an end face is fused by heating.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin pipe fusing machine. More particularly, the present invention relates to a resin pipe fusing machine that can automatically retreat a heater after heating a resin pipe from a resin pipe in a resin pipe fusing machine used for fusion splicing two resin pipes.

[0002]

2. Description of the Related Art A conventional fusion splicer for melting and connecting resin pipes includes a fixed clamp for holding one of a pair of resin pipes to be connected and a fixing clamp for holding the other resin pipe and moving toward or away from the fixed clamp. It is provided with a movable clamp that can be used, a facing machine for removing the end face of the resin tube, and a disk-shaped heater.

The operation of such a resin tube fusing machine will be described with reference to FIG. First, as shown in FIG. 1A, a resin tube 3, 3 'is clamped by a fixed clamp 1 and a movable clamp 2, respectively, and the end surfaces of the resin tubes 3, 3' are chamfered by a chamfering machine 4 as shown in FIG. After flattening) and aligning (checking the gap by abutting), a heater 5 is inserted between both end faces as shown in FIG. 3C, and the movable clamp 2 is pressed by the heater 5 in the direction of the fixed clamp 1 as shown in FIG. Heat. After heating and melting for a predetermined time, after removing the pressing force and heating and holding for a predetermined time,
The movable clamp 2 is retracted.

Then, the heater 5 is removed, and the movable clamp 2 is moved in the direction of the fixed clamp 1 to press the molten end surfaces of the resin tubes 3 and 3 'together as shown in FIG.
The joining is completed by releasing the force and holding for a predetermined time and cooling.
The heating time of the heater 5 and the pressure bonding after melting are controlled by an attached controller.

[0005]

In the above conventional welding machine for resin pipes, the insertion and removal of the heater 5 during the above-mentioned process are performed manually. There was a problem that it became complicated.

SUMMARY OF THE INVENTION In view of the above-mentioned conventional problems, the present invention realizes a resin pipe fusing machine capable of automatically removing a heater inserted between two resin pipes to be fused. The purpose is to:

[0007]

SUMMARY OF THE INVENTION In a resin pipe fusing machine according to the present invention, a fixed clamp 11 for holding one of a pair of resin pipes 10 and 10 'to be fused and a holding clamp for holding the other resin pipe. A movable clamp 12, a double-acting fluid cylinder 18 for reciprocating the movable clamp 12 so that the movable clamp 12 can approach and separate from the fixed clamp 11, and a heater 20 for melting an end surface of the resin tube. In the fusing machine,
A heater base 22 driven by a centering link mechanism so as to be always positioned between the fixed clamp 11 and the movable clamp 12;
A heater slide block 21 which is provided so as to be movable up and down by being guided by slide bars 25 and 25 'provided on the heater slide block 21 and the heater slide block so as to urge the heater slide block 21 upward. A heater support mechanism 13 including a spring means provided between the heater base 21 and the heater base 22;
Further, the heater base 22 is provided with locking means for locking the heater slide block 21 at a lowered position against the urging force of the spring means. A release means is provided for releasing the engagement of the heater slide block 21 when the movable clamp 12 is retracted after the holding.

In addition to the above, the means for locking the heater slide block 21 includes a hook pin 24 provided on the heater slide block 21 and having a hook 24a at a distal end, and a hook pin 24 provided on the heater base 22. Hole 27 through which the hook pin 2 is inserted.
The hook 24a has a hook 28a that can be engaged and disengaged, and a slidable locking member 28 that is pressed and urged by a spring 29.

The heater slide block 21
Is provided on the fixed clamp side, and has a cam lever 38 having a hook 38a that can be engaged with and disengaged from the hook 30 provided on the side surface of the locking member 28. When the movable clamp 12 moves in the direction approaching the fixed clamp 11, it engages with the hook 30 of the locking member 28, and when the movable clamp 12 moves in the direction away from the fixed clamp 11, the locking member 2
8, the engagement between the locking member 28 and the hook pin 24 of the heater slide block 21 is released.

[0010] By adopting this configuration, the two to be fused are formed.
Thus, a resin pipe fusing machine capable of automatically removing the heater inserted between the resin pipes is obtained.

[0011]

1 to 4 show an embodiment of the present invention. FIG. 1 is a perspective view, FIG.
FIG. 3 is a sectional view taken along line AA of FIG. 2, and FIG. 4 is a view showing a centering link mechanism.

In this embodiment, as shown in FIG. 1, a fixed clamp 11 for holding one of two resin tubes 10 and 10 'to be fused and a fixed clamp 11 for holding the other resin tube.
Movable clamp 12 that can approach or leave
And a surface shaving machine (not shown) for shaving the end surface of the resin tube, and a heater support mechanism 13.

As shown in FIG. 1, the fixed clamp 11 and the movable clamp 12 have an inner diameter equal to the outer diameter of the resin pipe having the maximum diameter of the target resin pipe, and the upper half thereof is rotatably connected by a hinge 14. And has a clamp screw 15 for fixing the resin tube. The fixed clamp 11 is fixed to a slide bar 16 for a movable clamp,
2 is slidable on the movable clamp slide bar 16 and reciprocally driven by a double-acting fluid cylinder 18 fixed to a fixed base 17. In the case where a resin tube having a small outer diameter is connected to the fixed clamp 11 and the movable clamp 12, a liner 19 adapted to the resin tube is mounted on the tube holding portion.

Further, the surface milling machine (not shown) has a rotary blade and a drive unit for driving the rotary blade, and can simultaneously cut the respective end surfaces of the resin tubes held by the fixed clamp 11 and the movable clamp 12. It has become. Further, as shown in the perspective view of FIG. 1 and the sectional views of FIGS. 2 and 3, the heater support mechanism 13 includes a heater 20 for melting the end of the resin tube,
Heater slide block 2 supporting the heater 20
1 and a heater base 22 for supporting the heater slide block 21 so as to be able to move up and down.

The heater 20 has a disk shape and has a heating wire embedded therein, and is attached to a heater slide block 21. The heater slide block 21
Are bushings 23, 23 'at two places on the left and right as shown in FIG.
And a hook pin 24 extending downward is provided at the center.

As shown in FIGS. 1 and 2, the heater base 22 has upper and lower members 22a and 22b integrally connected by screws 22c. Two heater slide block slide bars 25, 25 'which are inserted into the bushes 23, 23' provided to guide the heater slide block 21 up and down, and a spring means for urging the heater slide block upward. A gas spring 26 is provided so as to extend upward. A piston rod 26 a is fixed to the heater base 22, and a cylinder 26 b is fixed to the heater slide block 21.

The heater base 22 is provided with a hole 27 through which the hook pin 24 of the heater slide block 21 is inserted, and a hook 28a engaging with the hook 24a of the hook pin 24 as a heater slide block locking means. A locking member 28 is slidably provided in a horizontal direction and is urged by a spring 29. Also,
A hook 30 is provided on the locking member 28 in a direction perpendicular to the sliding direction and a cam receiving pin 31 is provided at a predetermined position in the vicinity thereof.
Is provided.

Further, the heater base 22 is supported by the movable clamp slide bar 16 so as to be movable to the left and right, and a link whose one end is pivotally supported by the fixed clamp 11 by a pin 11a as shown in FIG. 32, one end of which is pivotally connected to the movable clamp 12 by a pin 12a, and both ends of which are rotatably connected to the two links 32, 33.
The center block is connected to a centering link mechanism including a link 34 pivotally supported by a, and is always positioned between the fixed block 11 and the movable block 12.

Further, as shown in FIG.
A means for unlocking the heater slide block is provided. This locking release means is rotatably supported at one end by a pin 36 on a support arm 35 provided on the fixed clamp 11, and is provided with a cam lever 38 urged by a spring 37.
And an adjustable stopper 39 for restricting the movement of the cam lever. The cam lever 38 has a claw 38a which engages with and disengages from the hook 30 of the engaging member 28 of the heater base 22.
And a slope 38b that is in contact with the cam receiving pin 31.

The operation of the embodiment constructed as described above will be described below. First, the resin tubes 10, 10 'to be connected are clamped by the fixed clamp 11 and the movable clamp 12, and a chamfering machine is set between the end faces of the resin tubes 10, 10'. As in the conventional example described with reference to FIG. 8, the end face is chamfered (plane cut), the chamfering machine is removed, and then the core is aligned (matching and checking the gap).

In the present embodiment, the resin tubes 10, 1
As shown in FIG. 2, the heater slide block 21 is pushed down against the urging force of the gas spring to set the heater 20 between the end surfaces of the heater slide block 21 and the hook pins 24 of the heater slide block 21 are inserted into the holes 27 of the heater base 22.
And the hook 24 a of the hook pin 24 is engaged with the claw 28 a of the locking member 28 provided on the heater base 22. In this case, since the slope 38b of the cam lever 38 is in contact with the cam receiving pin 31 and the claw 38a is lowered, the sliding of the locking member is free.

Next, the movable clamp 12 is moved in a direction approaching the fixed clamp 11. This makes heater 2
0 is set between the end faces of the resin tubes 10, 10 '. At the same time, since the heater base 22 moves in the direction approaching the fixed clamp 11 by the centering mechanism, the relative position between the cam lever 38 and the cam receiving pin 31 changes as shown in FIG. And the claw 38a is engaged with the hook 3 of the locking member 28.
0 is engaged.

Next, the movable clamp 12 is pressed in the direction of the fixed clamp 11 and the heater 20 is energized to heat and melt the resin pipes 10, 10 'while pressing the end faces thereof.
When the end faces of the resin tubes 10, 10 'melt, the fixed clamp 1
The distance between the movable clamp 1 and the movable clamp 12 is further reduced.
The state is as shown below.

Next, after heating and holding the resin tubes 10 and 10 ′ for a predetermined time, the movable clamp 12 is moved in a direction away from the fixed clamp 11. Then the heater base 22
Also move in the same direction as the movable clamp 12 by the centering link mechanism, and as shown in FIG.
And the pawl 38a of the cam lever 38 are engaged, and the locking member 2
8 is pressed in the direction of arrow B.

As a result, the claw 28a of the locking member 28 is disengaged from the hook 24a of the hook pin 24. As a result, the heater slide block 21 is retracted upward along with the heater 20 along the slide bars 25 and 25 'by the urging force of the gas spring 26.

When the movable clamp 12 is further moved away from the fixed clamp, the cam lever 38 is moved by the cam receiving pin.
It rotates counterclockwise, and the cam lever claw 38a and the hook 3
0 is separated. As a result, the locking member 28 is
As a result, the heater slide block 21 can be set on the heater base 22 again as shown in FIG.

[0027]

According to the resin pipe welding machine of the present invention, in a resin pipe welding machine having a fixed clamp and a movable clamp for clamping a resin pipe to be welded, a heater base and a heater base are provided. A heater support mechanism comprising a heater support block urged upward by a gas spring on a slide bar provided, a means for locking the heater support block at a predetermined position, and a means for releasing the locking means. By providing the fixed clamp, the heater can be automatically removed (evacuated) when the movable clamp is retracted after the resin tube is heated and melted, which can contribute to labor saving of the fusion operation. .

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a main part of the embodiment of the present invention, showing a state where a heater slide block is set on a heater base.

FIG. 3 is a sectional view taken along line AA # of FIG.

FIG. 4 is a diagram showing a centering link mechanism according to the embodiment of the present invention.

FIG. 5 is a view for explaining the operation of the embodiment of the present invention, and is a view showing a state where a cam lever is set.

FIG. 6 is a diagram for explaining the operation of the embodiment of the present invention, and is a diagram illustrating a state when the resin tube is pressed, melted, and heated and held.

FIG. 7 is a diagram for explaining the operation of the embodiment of the present invention, and is a diagram illustrating a state when the heater is removed.

FIG. 8 is a view for explaining a conventional resin tube fusion method.

[Explanation of symbols]

 10, 10 '... resin tube 11 ... fixed clamp 12 ... movable clamp 13 ... heater support mechanism 14 ... hinge 15 ... clamp screw 16, 25, 25' slide bar 17 ... fixed table 18 ... double acting fluid cylinder 19 ... liner 20 ... Heater 21 ... Heater slide block 22 ... Heater base 23, 23 '... Bush 24 ... Hook pin 26 ... Gas spring 27 ... Hole 28 ... Locking member 29, 37 ... Spring 30 ... Hook 31 ... Cam receiving pin 32, 33, 34 ... Link 35 ... Support arm 36 ... Pin 38 ... Cam lever 39 ... Stopper

Claims (3)

[Claims] A pair of resin tubes (10, 1) to be fused.
0 '), a movable clamp (12) holding the other resin tube, and the movable clamp (12) can be moved toward and away from the fixed clamp (11). Fluid cylinder (18) that reciprocates likewise, and heater (20) that melts the end face of the resin tube
A heater base (22) driven by a centering link mechanism so as to always be located between the fixed clamp (11) and the movable clamp (12); Slide bar (25, 2) provided in (22)
5 '), the heater slide block (2) provided to be movable up and down and supporting the heater (20).
1) and a heater support mechanism (13) comprising spring means provided between the heater slide block (21) and the heater base (22) so as to urge the heater slide block (21) upward. The heater base (22) is further provided with locking means for locking the heater slide block (21) at a lowered position against the urging force of the spring means, and the fixing clamp (11) is provided. And a releasing means for releasing the locking of the heater slide block (21) when the movable clamp (12) is retracted after the resin tube is melted and held for a predetermined time. Fusing machine. 2. The heater slide block (21).
Means for locking the heater slide block (21)
, A hook pin (24) provided with a hook (24a) at a tip thereof, a hole (27) provided in the heater base (22) for inserting the hook pin (24), and a hook (24) of the hook pin (24). 2. The resin according to claim 1, further comprising a slidable locking member having a hook (28a) which can be engaged and disengaged from said first member (24a) and urged by a spring (29). Pipe fusion machine. 3. The heater slide block (21).
The release means for releasing the lock of the cam lever (38) is provided on the fixed clamp side and has a pawl (38a) which can be engaged with and disengaged from a hook (30) provided on the side surface of the locking member (28). The cam lever (38) engages with the hook (30) of the locking member (28) when the movable clamp (12) moves in a direction approaching the fixed clamp (11), and the movable clamp (38) 12) is a fixed clamp (1
When moving in the direction away from 1), the locking member (2)
8. The fusion splicer for resin pipes according to claim 1, wherein said engagement member is disengaged from said hook pin of said heater slide block by pressing said locking member.