JPH1158524A - 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, with which the piping material can be pressed at all times against a heater with an uniform pressure. SOLUTION: In a fusion welding machine for thermoplastic resin piping materials, which is equipped with a heater detachably installed at the heating and fusion position of piping materials under the state being supported by supporting members on a trestle and two clamps 3 and 4 holding two piping materials to be fusion-welded arranged on the trestle pinching a supporting member 7 therebetween so as to relatively slide the two clamps 3 and 4 and the supporting member on the trestle 2 in order to press the surfaces to be fusion-welded of the piping materials held by the clamps 3 and 4 against the heating surfaces of a heater for fusing the surfaces to be fusion-welded, the heater has a heater main body 6a and a supporting member installing part 63, which installs this heater main body 6a slidably supported by means of the pressing forces of the surfaces to be fusion-welded of the piping material to the supporting member 7.

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
Normally, the welding surface is preliminarily shaved using a chamfering device or the like to remove the oxide film on the surface and, if necessary, the piping material from which the surface oil has been removed with a cloth or the like soaked in acetone. A heating body such as a heater face or the like is provided with an interval capable of being inserted therebetween, and is clamped by a clamp provided on a gantry such that the fusion surfaces face each other.

[0003] Then, after the heating element is supported by a support member provided between the clamps of the gantry, both clamps are relatively slid in the direction of the support member so that the pipe member is placed on both sides of the heating element. The fusion surface is pressed and the fusion surface is heated and melted by the heat of the heater. Next, when the fusion surface is melted, the clamp is slid in the opposite direction to remove the heating element from between the piping material and the piping material, and then the clamp is slid again in the other clamping direction to make both fusion surfaces. They are directly butted and fused at a predetermined pressure (see Japanese Patent Application Laid-Open Nos. 6-8331 and 9-85828, etc.).

By the way, in the case where the fusion surface of the pipe is pressed against the heating body to be melted, the fusion surface of the piping material on both sides must be pressed against the heated fusion surface of the heating body at an equal pressure, so that the pipe material and the heating material are not melted. Beads B1 and B2 formed at the ends of the left and right pipe members P1 and P2 when butted against the pipe members become distorted as shown in FIG. 7A, or as shown in FIG. 7B. There is a possibility that the sizes of the left and right pipe members are different from each other, and a desired fusion strength cannot be obtained.

Therefore, in the case of the conventional welding machine, the holding position of the pipe material by the clamp is defined, and for example,
The heating member is supported by the supporting member, and the supporting member is slid in conjunction with the slide of the clamp so that the piping members on both sides are pressed evenly against the heated melting surface of the heating member as much as possible. However, the work of firmly fixing the piping material to the predetermined gripping position of the clamp requires time and skill.

Heating elements such as a heater plate and a heater face have heat resistance such as ethylene tetrafluoride resin (Teflon) in order to improve the releasability of the fused surface of the pipe material after melting. The resin with the moldability is coated on the surface, but if you are using it, the coating layer will bald, so you need to recoat, but because the difference between the left and right coating layers will come out, Even when the pipe material is accurately gripped at the initial gripping position of the clamp, it may not be evenly pressed against the heating element.

[0007]

SUMMARY OF THE INVENTION In view of such circumstances, the present invention provides a fusion splicer for thermoplastic resin piping material, which can always press the piping material against the heating element with a uniform pressure. It is intended to be.

[0008]

According to the first aspect of the present invention, there is provided a welding machine for a thermoplastic resin piping material (hereinafter referred to as "a first aspect of the invention").
In order to achieve such an object, a welding body which is detachably attached to a heating and melting position of a pipe material while being supported by a support member on a gantry, And two clamps which hold the two pipe members to be held and are disposed on the gantry with the support member interposed therebetween, and the two clamps and the support member slide relatively on the gantry and are gripped by the clamps In a thermoplastic resin pipe material fusing machine that is configured to press the fusion surface of the material against the heating surface of the heating body supported by the support member and melt the fusion surface, the heating body is
The heating element main body and a supporting member mounting portion that is slidably supported by the pressing force of the fusion surface of the pipe material and is mounted on the supporting member are provided.

Further, in the fusing machine according to the first aspect, it is preferable that the stopper for regulating the slide width of the heating body is provided in the support member mounting portion.

On the other hand, the fusion machine for thermoplastic resin piping material according to the invention of claim 3 (hereinafter referred to as the "fusion machine of claim 3")
) Is a heating element that is detachably attached to the heating and melting position of the pipe member while being supported by the support member on the gantry, and that the two pipe members to be fused are gripped and sandwiched by the support member. A heating element provided with two clamps disposed on a gantry, wherein the two clamps and the support member slide relative to each other on the gantry to hold the fusion surface of the pipe material held by the clamps to the support member In a thermoplastic resin pipe material fusing machine adapted to be pressed against the heating surface of the pipe to melt the fusing surface, the supporting member supports the heating body at the heating / melting position and melts the pipe material. The clamp is slidable in the sliding direction by the pressing force of the contact surface.

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 separate, 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 abut. Thus, it is preferable that the step of press-contacting at a predetermined pressure and fusing both pipe members can be automatically performed.

The heating element is not particularly limited as long as it has a surface capable of heating and fusing the fusion surface of both pipe members on both sides, and examples thereof include a heater plate and a heater face. The method of sliding the two clamps and the support member relatively on the gantry is to hold the support member in a fixed state, to slide the two clamps toward the support member from both sides, or to fix one of the clamps to support the support member. There is a method of sliding the member and the other clamp toward one clamp.

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.

According to the third aspect of the present invention, when only one of the two clamps slides, the supporting member moves when the movable clamp slides toward the fixed clamp.
The support member is also slidably received by the gantry, is slid in conjunction with the slide of the movable clamp by the driving means, and is always slid along the gantry so as to be located at the center of both clamps. Therefore, it is necessary to release the connection between the support member and the driving means when the support member reaches the heat melting position.

The means for driving the support member is not particularly limited. For example, there is a method in which the support member is connected to an air cylinder, an oil cylinder, or a movable clamp by a link or the like, and is driven in conjunction with the movable clamp driving means. . Incidentally, as a method of releasing the connection between the driving means and the support member when using the air cylinder, for example, a method of equalizing the pressure of both chambers of the cylinder of the air cylinder using an equalizing valve and releasing the connection. And a method of opening both chambers of the air cylinder to the atmosphere.

As a method for releasing the connection between the driving means and the support member when an oil cylinder is used, for example, a method of reducing the pressure in both chambers of the oil cylinder to zero can be mentioned. As a method of connecting the movable clamp with a link or the like and using the driving means of the movable clamp to release the connection between the driving means and the support member, there is a method of freeing the link or the like at its fastening portion. .

It is preferable that the supporting member is slidably received by a guide or the like having as little frictional resistance as possible.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below.
The details will be described with reference to the drawings. 1 to 4 show an embodiment of a welding machine for thermoplastic resin piping material according to the present invention (a welding machine according to claim 2).

As shown in FIG. 1 and FIG. 2, this thermoplastic resin pipe material fusing machine (hereinafter referred to simply as "fusing machine").
1a is a stand 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 material 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 has 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 / 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 62. The heating body 6a includes an arm 63 that supports the arm 62 and is rotatably supported by the base 61, and a hydraulic cylinder 64 that rotates the arm 63 as a support member mounting portion around the pivot shaft. I have.

The heater plate 62 is shown in FIGS.
As shown in FIG. 7, stoppers 63c, 63c suspended from two arms, and suspended from two guide rails (trade name: LM guide or linear guide) 62a, 62a so as to slide in the sliding direction of the base 61. The slide width is regulated to about 15 mm. Although not shown, the heater plate 62 is provided with a temperature sensor, which measures the temperature of the heater plate 62 with the temperature sensor and sends the result to a control device of an operation panel (not shown). Has become.

The arm 63 is provided with 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 are configured to slide along a rail 22 via a hydraulic cylinder to a chamfering position or a heating / melting position.

As shown in FIG. 3, the support 7 is
Support rails 2 provided in parallel outside 1, 21
3 and 23 are slidably supported and 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 7 is provided with support columns 74 at both ends.
Is engaged with the engaging groove 71 provided at the upper end of the support column 74 when the engaging claws 53a, 53a of the chamfering device 5 or the engaging claws 63a, 63a of the heating / melting device 6 come to the mounting position. It is supposed to.

The operation of the fusing machine 1a 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.

When the cutting plate 52 is driven to rotate by the motor 54, the movable clamp 4 is slid toward the fixed clamp 3 so that the pipe end surfaces 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 members 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.
Slide to the side and move to the heating and melting position.

At the same time, the fusion surfaces of the pipe members P1 and P2 gripped by the clamps 3 and 4 abut against the heater plate 62. The heater plate 62 is slidable by the guide rails 63a and 63a of the arm 63. Since the pipes P1 and P2 are supported, if there is a difference between the abutment pressures of the two pipe members P1 and P2, the heater plate 62 moves until the pressure balances to the weaker one. Therefore, the fused surfaces of the two pipe members P1 and P2 are uniformly pressed against the heated surface of the heater plate 62, and are uniformly 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 by both pipe members P1. , P2 are slid until the fused surfaces in the molten state are brought into contact with a predetermined pressure, 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, according to the fusing machine 1a,
Even if the pipe material is not correctly held at the gripping position of the clamp, or the chamfering ratio is different for each of the pipe materials P1 and P2 due to wear of the blade 52a of the chamfering device 5, etc.
The fused surface of the two pipe members P1 and P2 is heated at a uniform pressure by the heating element 6a.
Is pressed against the heat-sealed surface and is uniformly melted, so that the beads are formed evenly during the welding. Therefore,
It is always possible to obtain a product with excellent joint strength at the joint.

FIG. 6 shows another embodiment of the fusion machine according to the present invention (the fusion machine of claim 3).

As shown in FIG. 6, in the fusing machine 1b, instead of the link 72 of the fusing machine 1a, the support member 7 'is independently slid by an air cylinder 73 to a heat melting position. And the heater plate 6
2 is fixed to the arm 63, and when it reaches the heating and melting position, both the chambers 73a and 73b of the air cylinder 73 are released to atmospheric pressure. 1a.

That is, according to the fusing machine 1b, when the heater plate 62, on which the support member 7 'is slid and supported, reaches the heating and melting position, the pressure in both the chambers 73a, 73b of the air cylinder 73 is increased. Since the pressure is released to the atmospheric pressure, if there is a difference between the contact pressures of the two pipe members P1 and P2, the heater plate 62 moves together with the support member 7 'until the pressure balances to the weaker pressure. . Therefore, according to the fusing machine 1b, similarly to the fusing machine 1a, the fusing surfaces of the two pipe members P1 and P2 are evenly pressed against the heating surface of the heater plate 62 and are uniformly melted.

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 has a chamfering device, the chamfering device does not have to be provided.

In the above embodiment, the heating and fusing device 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 attachment of the heater plate to the support member may be performed manually. Further, in the case where a heater face is used as a heating element, the heater face is slidably supported not only in the sliding direction of the support member but also in a direction orthogonal to the slide direction of the support member, and the heater face is provided on the arm. If the balancer is attached and supported by the support member in a substantially weightless state, when fitting the piping material to the heating portion of the heater face, the axis of the piping material and the axis of the heater face may be misaligned. However, the heater face can be freely slid up, down, left, and right so as to be pushed by the wall surface of the piping material so that the heater face coincides with the axis of the piping material.

[0044]

As described above, the welding machine according to the present invention can always press the pipe against the heating element with a uniform pressure. Therefore, product quality stability can be achieved.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment 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;

FIG. 5 is an enlarged view of FIG.

FIG. 6 is a front view of a supporting member of a fusing machine according to an embodiment of the present invention.

FIG. 7 is an explanatory diagram illustrating a mode of a fusion defect.

[Explanation of symbols]

 P1, P2 Piping material 1 Fusing machine 2 Mount 3 Fixed clamp 4 Movable clamp 6a Heating body 62 Heater plate (heating body main body) 63 Arm (supporting member mounting part) 63c Stopper 7, 7 'Supporting member

Claims (3)

[Claims] 1. A heating element which is detachably attached to a heating and melting position of a pipe member while being supported by a support member on a gantry, and which holds the two pipe members to be fused while holding the supporting member therebetween. A heating element provided with two clamps disposed on a gantry, wherein the two clamps and the support member slide relative to each other on the gantry to hold the fusion surface of the pipe material held by the clamps to the support member In a thermoplastic resin pipe material fusing machine adapted to press against the heating surface of the pipe to melt the fusion surface, the heating element comprises a heating element body and And a supporting member mounting portion which is slidably supported by a pressing force and mounted on the supporting member. 2. The welding machine according to claim 1, wherein a stopper for regulating a slide width of the heating body is provided on the support member mounting portion. 3. A heating element which is detachably mounted on a heating and melting position of a pipe member while being supported by a support member on a gantry, and a holding member which holds two pipe members to be fused by holding the holding member. A heating element provided with two clamps disposed on a gantry, wherein the two clamps and the support member slide relative to each other on the gantry to hold the fusion surface of the pipe material held by the clamps to the support member In a thermoplastic resin pipe material fusing machine adapted to be pressed against the heating surface of the pipe to melt the fusing surface, the supporting member supports the heating body at the heating / melting position and melts the pipe material. A fusing machine for thermoplastic resin piping, wherein the fusing machine is slidable in a sliding direction of a clamp by a pressing force of a mounting surface.