JPH1158523A - Fusion welding machine for thermoplastic resin piping material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fusion welding machine for thermoplastic resin piping materials, which develops no poor fusion welding due to poor heating or the oxidation of fusion-welded surfaces. SOLUTION: In a fusion welding machine for thermoplastic resin piping materials, in which at least one clamp 4 between two clamps 3 and 4, which hold two piping materials P1 and P2 to be fusion-welded so as to face respective surfaces to be fusion-welded of the two piping materials to each other, is supported slidably onto a trestle towards the direction of the other clamp 3 and a heater is detachably installed at an installing position between the piping materials P1 and P2 held b both the clamps 3 and 4, the heater has a temperature sensor. Further, an installation preventing means, which prevents the heater from being installed at the installing position when the temperature measured with this temperature sensor is below the set temperature of this device, is equipped.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a welding machine for thermoplastic resin piping.

[0002]

2. Description of the Related Art A conventional fusion splicer for thermoplastic resin piping is
In order to fuse the piping materials together, each of the piping materials to be fused to the two clamps is gripped, and the fusion surfaces of the two piping materials are arranged facing each other with a predetermined gap therebetween. Attach the heater plate or heater face to the mounting position. Next, at least one of the two clamps is slid to the other clamp side, and the fused surface of both pipe members is pressed against the heater plate or the heater face for a predetermined time to be heated and melted, and then the clamp is slid. Separate the fusing surface from the heater plate or face and remove the heater plate or face. As soon as the heater plate or heater face is removed, one clamp is slid in the direction of the other clamp, and the fused surfaces of both piping materials are abutted on the molten pipe end surface to fuse both piping materials. ing.

However, in the case of the conventional fusion machine, when the heater is not sufficiently heated due to forgetting to switch on the heater plate or the heater face at the start of the operation or misunderstanding by the operator, the both pipes are melted at the heater plate or the heater face. While the fusion surface of the materials does not reach the predetermined molten state, the two piping materials are butted against each other, and there is a possibility that defective fusion occurs.

In order to solve such a problem, a fusing machine as disclosed in Japanese Patent Application Laid-Open No. 9-85828 has been proposed.

That is, in this fusion machine, the temperature of the heater plate is measured by a temperature sensor embedded in a predetermined portion of the heater plate. When the temperature is not required), even if you press the switch to slide the clamp,
By preventing the slide device from operating, defective fusion is prevented.

Although the above-mentioned fusion machine can improve the fusion defect compared with the conventional fusion machine, in particular, in the case of butt fusion or saddle fusion, the fusion surface directly contacts the heater plate. Even if it is not done, since the fused surface of the piping material is continuously exposed to the radiant heat from the heater plate until the heater plate reaches a sufficient heating temperature, the fused surface may be oxidized in some cases, resulting in surface oxidation. There is a risk of causing poor fusion.

[0007]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a welding machine for a thermoplastic resin piping material which is free from defective heating and defective bonding due to oxidation of the bonded surface. And

[0008]

SUMMARY OF THE INVENTION In order to attain the above object, a welding machine for thermoplastic resin piping according to the present invention has two piping materials to be welded facing each other. At least one of the two clamps is slidably supported on the gantry in the other clamp direction, and the heating element is detachable at the mounting position between the pipe members gripped by both clamps In the fusing machine for thermoplastic resin pipe materials, the heating element has a temperature sensor, and when the temperature measured by the temperature sensor is equal to or lower than a set temperature, mounting of the heating element to the mounting position is prevented. Means.

In the above configuration, although not particularly limited,
The process of mounting the heater plate or heater face to the mounting position, the process of sliding the clamp in the direction in which both piping materials approach, and pressing the fusion surface of the piping material against the heating surface of the heater plate or heater face, respectively. After melting, slide the clamp in the direction in which both pipes are separated, then remove the heater plate or heater face from between the two pipes, and slide the clamp again until the end faces of both pipes meet. Thus, it is preferable that the step of press-contacting at a predetermined pressure and fusing both pipe members can be automatically performed.

The mounting preventing means is not particularly limited. For example, in a fusing machine capable of automatically attaching and detaching the heating element, for example, when the temperature of the heating element does not reach the set temperature, a driving device for attaching and detaching the heating element is used. A method of providing a circuit in the control device such that the control device always issues a signal so that the drive device is in the standby position, or a method in which the stopper pops out in the middle of the movement path of the heating element by a signal from the control device,
A method of stopping the movement of the heating element with the stopper may be used.

In the case of a fusing machine in which a heating element is manually mounted, there is a method in which a stopper is electrically projected to a guide frame or the like when the heating element is mounted. The heating body is not particularly limited as long as it has a surface capable of heating and melting the fusion surface of both pipe members on both sides, and examples thereof include a heater plate and a heater face.

The material of the pipe material that can be fused by the fusion machine of the present invention is not particularly limited as long as it can be thermally fused, and examples thereof include polyvinyl chloride, polyethylene, polypropylene, and polyvinylidene fluoride. . The shape of the pipe material that can be fused by the fusion machine of the present invention is not particularly limited, and examples thereof include a combination of a straight pipe and a straight pipe, a receiving pipe and a short pipe, and a cheese and cheese.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below.
The details will be described with reference to the drawings. FIG. 1 to FIG. 4 show an embodiment of a welding machine for thermoplastic resin piping material according to the present invention.

As shown in FIGS. 1 and 2, this thermoplastic resin pipe material fusing machine (hereinafter, simply referred to as "fusing machine").
1 is a gantry 2, a fixed clamp 3, and a movable clamp 4.
, A chamfering device 5, a heating and melting device 6, and a support table 7. The fixed clamp 3 is fixed on the gantry 2 and can clamp one of the pipe materials P1 to be fused.

As shown in FIG. 1, the movable clamp 4 can clamp the other pipe member P2 to be fused, and is movable by a hydraulic cylinder (not shown).
The rails 21 and 21 provided on the gantry 2 advance and retreat in the direction of the fixed clamp 3.

As shown in FIGS. 2 and 3, the chamfering device 5 includes a base 51 slidably supported on rails 22, 22 provided in parallel with the rails 21, 21 of the movable clamp 4. A disk-shaped cutting plate 52 having blades 52a provided on both surfaces thereof, and rotatably supporting the cutting plate 52;
An arm 53 rotatably supported by the base 51, a motor 54 fixed on the arm 53 and driving the cutting plate 52 to rotate, and a hydraulic cylinder 55 for driving the arm 53 to rotate around the pivot shaft. It has.

The arm 53 is provided with locking claws 53a, 53a which engage with locking grooves 71 of the support 7 described later.

As shown in FIGS. 2 and 4, the heating and melting device 6 includes a base 61 slidably supported on the same rail 22 as the chamfering device 5, a heater plate 62 as a heating body, and a heater plate. An arm 63 that supports 62 and is pivotally supported by the base 61 so as to be freely rotatable is provided with a hydraulic cylinder 64 that drives the arm 63 to rotate around its pivot shaft. Although not shown, the heater plate 62 has a temperature sensor provided therein, and the heater plate 62 is provided by the temperature sensor.
Is measured, and the result is sent to a control device of an operation panel (not shown).

The arm 63 has locking claws 63a, 63a which engage with locking grooves 71 of the support 7 described later. Further, the chamfering device 5 and the heating / melting device 6 slide along a rail 22 to a cutting position or a heating position via a hydraulic cylinder.

As shown in FIG. 3, the support 7 is
Support rails 2 provided in parallel outside 1, 21
3 and 23, and is connected to the movable clamp 4 via a link 72. When the movable clamp 4 is slid by the hydraulic cylinder, the movable clamp 4 is simultaneously moved in the same direction as the movable clamp 4. Is slid with a movable width of about 1/2 of the above.

The support table 7 has columns 73 at both ends.
Are engaged with the locking grooves 71 provided at the upper end of the support column 73 when the locking claws 53a, 53a of the chamfering device 5 or the locking claws 63a, 63a of the heating and melting device 6 come to the mounting position. It is supposed to.

The operation of the fusing machine 1 will be described below in the order of working steps. The power of the heater plate 62 of the operation panel 8 is turned on, and the heater plate 62 is heated and heated.

Fixed clamp 3 and movable clamp 4
Are clamped so that the fusion surfaces face each other.

The switch for starting the chamfering of the control panel 8 is turned on, and the pipe end faces of both pipe members are chamfered. That is, when the switch for starting cutting is turned on, the chamfering device 5 is moved to the mounting position, and then the hydraulic cylinder 55 is operated and the arm 5 is turned off.
4 is rotated, and the cutting plate 52 is disposed between the piping material P1 and the piping material P2 clamped by the fixed clamp 3 and the movable clamp 4. At this time, the locking claw 53 of the chamfering device 5
a, 53 a engage with the locking grooves 71, 71 of the support base 7.

The movable clamp 4 is slid toward the fixed clamp 3 while the cutting plate 52 is driven to rotate by the motor 54, so that the pipe end faces of the pipe members P1 and P2 clamped by the clamps 3 and 4 are removed. Each of them is pressed against the corresponding surface of the cutting plate 52 for a predetermined time. That is, the locking claws 53a of the chamfering device 5 are
1 and 71, the support base 7 also slides toward the fixed clamp 3 as the movable clamp 4 slides, so that the chamfering device 5 also slides along with the support base 7 toward the fixed clamp 3 and both pipe members Pipe end faces of P1 and P2 are cut plates 5
2 are pressed evenly against the corresponding surfaces.

Then, the pipe end face of the pipe material pressed against the cutting plate 52 is chamfered by pressing, so that a surface without oxidation is exposed. Next, the movable clamp 4 slides in a direction away from the fixed clamp 3, the rotation of the cutting plate 52 stops, and the arm 53 is pulled up.

The center of the chamfered pipe members P1 and P2 is aligned. If necessary, the fused surfaces of the pipe members P1 and P2 are cleaned with a cloth or paper towel containing acetone.

The switch for automatic fusion of the operation panel 8 is pressed to automatically fuse both the pipe materials P1 and P2. That is, when the switch of the automatic fusion is turned on, when the temperature of the heater plate sent from the temperature sensor has risen to the set temperature, the heat fusion device 6 moves on the rail 22 to the mounting position, and the arm 63 moves. Is rotated, and the heater plate 62 is connected to both piping materials P.
1, between P2. At this time, the locking claws 63a, 63a of the heating and melting device 6 are engaged with the locking grooves 71, 71 of the support base 7.

Next, the movable clamp 4 is
As a result, the pipe end surfaces of the two pipe members P1 and P2, that is, the fusion surfaces are pressed against the corresponding surfaces of the heater plate 62, and the fusion surfaces are heated and melted. That is, the locking claws 63a, 63a of the heating and melting device 6 are
1 and 71, the support base 7 also slides toward the fixed clamp 3 as the movable clamp 4 slides.
Side, and the fused surfaces of the two pipe members P1 and P2 are pressed evenly against the corresponding surfaces of the heater plate 62 and are evenly melted.

After the melting, the movable clamp 4 is retracted, the arm 63 is rotated and the heater plate 62 is lifted above the support table 7, and immediately the movable clamp 4 is again moved to the fixed clamp 3 side. The fused surfaces of the materials P1 and P2 slide at a predetermined pressure until they come into contact with each other, and are heated and held in the contact state for a certain period of time, and then cooled to obtain a fused pipe material.

As described above, when the temperature of the heater plate is not raised to the design temperature even when the automatic fusion switch is pressed, the heater plate 62 is connected to the pipe material P.
1 and the piping material P2, so that the fused surfaces of the piping materials P1 and P2 are exposed to the radiant heat of the heater plate 62 without being oxidized as in the related art. Of course, the piping material P is attached to the heater plate 62 which has not reached the set temperature.
The fused surfaces of P1 and P2 are not pressed.

Therefore, the pipe material P is always kept under normal conditions.
1 and the piping material P2 can be fused, and the quality of the product can be stabilized. In FIG. 1, reference numeral 9 denotes a hydraulic unit.

The fusing machine according to the present invention is not limited to the above embodiment. For example, in the above embodiment,
Although the fusing machine 1 includes the chamfering device 5, the chamfering device may not be provided.

Further, in the above embodiment, the heating and fusing apparatus automatically and continuously performs a series of steps of mounting the heater plate, melting the fusion surface, detaching the heater plate, and fusing. However, the mounting of the heater plate may be performed manually. When mounting the heater plate manually, for example, a rail groove is provided in the mounting portion of the heater plate so that the side edge of the heater plate fits in, and the heater plate rises to a set temperature at an entrance of the rail groove. When it is not heated, a method may be employed in which a stopper that protrudes and prevents the heater plate from being inserted into the rail groove is provided as mounting prevention means.

Further, in the above embodiment, each member is operated by hydraulic pressure, but may be operated by using air pressure or other driving means.

[0036]

As described above, the welding machine according to the present invention is constructed as described above, so that there is no defective welding or defective welding due to oxidation of the bonded surface. Can be fused, and the quality of the product can be stabilized.

[Brief description of the drawings]

FIG. 1 is a plan view of a fusing machine according to the present invention.

FIG. 2 is a front view of the welding machine of FIG.

FIG. 3 is an enlarged view of a chamfering device portion of the welding machine of FIG. 1;

FIG. 4 is an enlarged view of a heating and melting device of the fusing machine of FIG. 1;

[Explanation of symbols]

 P1, P2 Piping material 1 Fusing machine 2 Mount 3 Fixed clamp 4 Movable clamp 62 Heater plate (heating body)

Claims (1)

[Claims] 1. Two clamps for holding two pipe members to be welded so that their fused surfaces face each other.
For a thermoplastic resin piping material in which at least one clamp is slidably supported by a gantry in the other clamping direction and a heating element is detachable at a mounting position between the piping materials gripped by both clamps. In the fusion machine, the heating body has a temperature sensor, and when the temperature measured by the temperature sensor is equal to or lower than a set temperature, the heating body is provided with mounting prevention means for preventing the heating body from being mounted at the mounting position. A welding machine for thermoplastic resin piping.