JPH06226849A - Device for thermally fusing piping composed of thermoplastic resin - Google Patents

Abstract

PURPOSE:To provide the device revolving two pipings having bent parts by a predetermined angle to simply connect them. CONSTITUTION:One angle applied adjusting ring 17' determining the marking (m) preliminarily provided to a pipe at a definite position is attached to the pipe support part of a fixed jig 13 and an angle applied adjusting ring 17 is attached to the pipe support part of a movable jig 12. For example, the marking (m) of the pipe 1 fixed to the fixed jig 12 is matched with the reference position of the angle applied adjusting ring 17 and the marking (m) of the pipe 1' supported by the movable jig 12 is revolved by a desired angle from the reference position of the adjusting ring to set the mutual fusing posture of the pipes 1, 1' to a desired angle.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat fusion device for a pipe made of a thermoplastic resin, and more particularly to a heat fusion device for connecting two pipes having a bent portion at a predetermined angle.

[0002]

2. Description of the Related Art In semiconductor manufacturing factories, as well as factories that handle various types of soft drinks, ultrapure water, pharmaceuticals, etc., in some cases, pipe parts made of lightweight and corrosion-resistant materials are used instead of metal pipes. Has been done. These pipe parts are manufactured by injection molding, transfer molding, cutting, or the like.

[0003] For example, in a plant for producing ultrapure water, PVDF (polyvinylidene fluoride), which is a crystalline thermoplastic resin having both mechanical properties and corrosion resistance, is used for piping parts, which are injection molded. Has been formed.

This PVDF piping is most suitable for ultrapure water piping. For example, the gas barrier property is 1/280 of PTFE (in the case of oxygen), the abrasion resistance is 1/100 of PTFE, and S is S.
It is 1/5 to 1/10 of US, and it is strong against strong acid and has excellent weather resistance.

By the way, when joining pipe members made of a thermoplastic resin, a solvent may be applied to the joint surface like vinyl chloride to join the pipe members, but today, PVDF is used.
As in the case of (3), a method of heating and welding the bonding surfaces is actively used. Infrared rays are used for heating such a material so that the material can be uniformly heated without contact. If the welding is carried out in a non-contact manner as described above, there is almost no risk of the welding surface being contaminated, and a welding structure without undercut can be obtained.

[0006]

However, a piping line in an ultrapure manufacturing apparatus using a thermoplastic resin pipe is becoming extremely complicated today. Therefore, in these piping lines, joints including bent portions such as cheese and elbow are often used, and it becomes necessary to swing the pipe bent by these at a predetermined angle to the left and right to connect to other piping. That is, there is a demand for a technique for connecting two pipes at a predetermined angle.

In such a case, in the past, the connection was made with a certain amount, or one of them was placed on a table and the angle was measured and joined, but it was not only inefficient but also inaccurate. . In view of such a situation, the present invention has a bent portion 2
An object of the present invention is to provide a heat-sealing device for pipes made of a thermoplastic resin, which is capable of rotating two pipes at a predetermined angle and easily connecting them.

[0008]

DISCLOSURE OF THE INVENTION The present invention for achieving the above object comprises a fixed jig on one side and a movable jig, and coaxially supports pipes each having a bent portion. The jig on the fixed side is a device for heat fusion of a pipe made of a thermoplastic resin that causes the end faces of the pipes to face each other by advancing the jig on the movable side and causes heat to fuse the pipes. Attach one angled adjustment ring to the pipe support part that sets the markings on the pipe in advance at a fixed position, and then attach the other angled adjustment ring to the pipe support part of the movable jig. , The marking of the pipe fixed to one of the above jigs,
While aligning with the reference position of the angled adjustment ring attached to this jig, remove the marking of the pipe supported by the other jig from the reference position of the angled adjustment ring attached to this jig. It is characterized in that the pipes are rotated by a desired angle to set the fusion postures of the pipes at a desired angle.

[0009]

According to the present invention having the above-described structure, for example, when a pipe having one bent portion is attached to a jig on the fixed side, the pipe is set on the angled adjustment ring based on the marking of the pipe while the pipe on the movable side is set. The pipe attached to the jig is attached to the other angled adjustment ring by rotating it from the reference position by a desired angle, whereby the pipe having two bent portions is faced in an appropriate state. In this state, heat is applied in close proximity to each other and the end faces are fused to each other, so that they can be joined at a desired angle.

By such means, two pipes can be connected at a predetermined angle in any complicated piping line.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiments shown in the drawings. FIG. 1 is a schematic view of a main part of a heat fusion apparatus according to an embodiment of the present invention, and FIG. 2 is an example of a pipe fused by the heat fusion apparatus of FIG. .

The pipe having a bent portion used in this embodiment is an elbow 1 bent at 90 °. This elbow 1
Is formed of polyvinylidene fluoride (PVDF) which is a thermoplastic resin, and piping members made of this resin are widely used in ultrapure devices and the like. Protrusions are formed around the open ends 1a, 1b of the elbow 1 at intervals of 90 °. Although the protrusion is configured as the marking m in the present embodiment, the marking is not limited even if it is a kerf or is marked with ink or the like.

Further, in such an elbow 1, even if a straight pipe portion extending from the bent portion to the openings at both ends is long, as if a short pipe is connected to the elbow 1, the elbow 1 is formed by a heat fusion device as will be described later. Can be connected at a predetermined angle in the same manner as. Further, in addition to the elbow 1 as described above, the present invention can be applied even if a pipe member to which another straight pipe is connected is provided with the marking m.

In the heat-sealing device 10 for heat-sealing such a piping member, a movable jig 12 and a fixed jig 13 are installed on a support portion 11. The movable jig 12 has a guide rail 14, and the movable main body portion 15 engaged with the guide rail 14 is formed slidably.

In addition, the main body portions 15 and 16 of the movable and fixed jigs 12 and 13 are both divided into two parts, and both of them have an upper portion 15a by a hinge (not shown).
Alternatively, 16a is rotatably supported on the lower portions 15b and 16b.

Further, these jigs 12 and 13 are formed with an opening for inserting a pipe in the center thereof.
Although not shown, a pipe tightening mechanism is interposed in these openings. Therefore, the inserted pipe is clamped with a predetermined strength and supported so as not to fall in that posture.

On the other hand, as shown in FIG. 3, angled adjustment rings 17 and 17 ', each having a peripheral angle, are formed on the peripheral surfaces of the openings formed in the central portions of the jigs 12 and 13, respectively. Installed. This illustrated angled adjustment ring 1
7 and 17 'are made of thin metal plates,
This ring may be made of synthetic resin such as acrylic. Alternatively, it may be formed of paper or the like, and the material is not limited at all. Further, the intervals at which the scales are marked are not limited to once, and may be twice or more, and are not particularly limited. Further, as for the shape, if the opening for passing the pipe is formed in the central portion, the outer shape may be formed in a square shape.

Such angled adjustment rings 17, 1
7'is also formed in two, and can be opened and closed integrally with the upper or lower portions of the jigs 12 and 13 in the attached state.

Although the essential parts of the heat fusion apparatus 10 according to one embodiment of the present invention are constructed as described above, such a heat fusion apparatus 10 is usually not shown for emitting infrared rays. A heating means is provided.

The procedure for connecting the two pipes 1, 1'by means of the heat fusion device 10 will be described below. Now, assume that the joint relationship between the pipes 1 and 1'shown in FIGS. 4A and 5 is in a reference position of the two pipes, that is, in a reference posture in which the pipes are not inclined. Note that P
Is the joining surface of the two pipes 1, 1 '.

On the basis of the states of FIGS. 4 (a) and 5 described above, for example, one pipe 1'is connected to the other pipe 1 '.
On the other hand, a case will be described in which, for example, they are rotated by 10 ° and joined. The state diagram after rotating and joining by 10 ° is shown in FIG.
It is (b) and is FIG.

When the two pipes are joined to each other with a relative inclination of 10 ° from the reference position, for example, one pipe 1 is supported by the jig 12 on the fixed side. At that time, jig 1
2 body part 15 is divided into two and the central part is opened,
The pipe 1 is inserted between them. The pipe 1 matches the four markings m in the opening with the graduated positions of 0 °, 90 °, 180 ° and 270 ° of the angled adjustment ring 17, respectively. Then, the main body portion 15 is closed again, and the pipe 1 is tightened by a tightening mechanism (not shown).

Next, another pipe 1'is installed on the fixed jig 13. At that time, the main body portion 16 is divided into two, and the pipe 1'is inserted between them, as described above. Before tightening the pipe 1 ', 0 °, 90 °, 180 °, 270 of the angled adjustment ring 17' attached to this jig
Each marking m is aligned at a position shifted by 10 ° from the position marked with °. In this way, the pipe 1'is in a posture rotated by a desired angle with respect to the pipe 1.

After setting in this manner, in this heat fusion apparatus 10, the movable jig 12 is slid to the fixed jig 13 side, and the end portions are uniformly heated by infrared heating means (not shown). , Fusion between the end faces. Then, as shown in FIGS. 4B and 6, the two pipes 1 and 1 ′ are connected in a posture shifted by 10 °.

In this way, the two pipes that are evenly heated by the infrared rays and connected are joined in a clean state without being contaminated between the joint end faces. Also, the rotated joint angle is accurate, and thus a complicated piping line can be formed.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment. For example, in the above embodiment, the pipe 1'installed on the fixed jig 13
Although it was rotated by a predetermined angle, the pipe 1 installed in the movable jig 12 may be rotated instead of this. Also, the elbow 1 bent at 90 ° as a pipe having a bent portion
However, it is needless to say that the present invention can be applied to an elbow bent at 135 ° or a pipe having cheese open on three sides instead of this.

Further, the piping material is not limited to the above PVDF, and it is of course applicable to a piping member made of other thermoplastic resin such as PFA (tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer).

Further, although four pipe markings are provided in the above embodiment, the number of pipe markings may be less than four depending on the case. Further, in the above-mentioned example, the marking made of the protrusion is provided by injection molding, but the marking may be a groove. Even with such marking, the pipe can be adjusted to a predetermined angle. Also, the angles marked on the angled adjustment ring may be at intervals of 2 ° or 5 ° or more instead of 1 °.

Further, in this embodiment, the angle is displayed on the angled adjustment ring, but instead of this, it is also possible to display the angle on the peripheral surface of the piping component and mark the adjustment ring side.

As shown in FIGS. 7 and 8, 2
It is also possible to prepare a pipe fixture 30 composed of split pieces, and to interpose this fixture 30 in the movable jig 12, for example. The pipe fixture 30 includes an upper first portion 31 and a lower second portion 32. When the fixture 30 is interposed, the first portion 31 is the upper portion 15a of the jig 12.
Secondly, the second portion 32 is slidably arranged in each groove of the lower portion 15b of the jig 12. At this time, the pipe 1 is rotatable integrally with the fixture 30 so that the rotation angle can be finely adjusted.

By interposing such a fixture 30, the contact area with the pipe can be increased, so that the posture for supporting the pipe 1 can be further stabilized. Also,
When such a fixture 30 is used, pipes having different diameters can be fused by preparing various fixtures 30 having different diameters without changing the dimensions of the movable jig 12. it can.

Further, such a fixture 30 may be arranged not only on the movable side jig 12 but also on the fixed side jig 13.

[0033]

As described above, according to the present invention,
For example, when attaching a pipe with one bent portion to a fixture on the fixed side, set it on the angled adjustment ring based on the marking of this pipe, while attaching the pipe attached to the jig on the movable side to the other angled adjustment ring. Since the pipe having the two bent portions may be faced in an appropriate state by being attached by being rotated by a desired angle from the reference position, the angle adjustment is accurate and easy.

Therefore, by using the present apparatus, it is possible to connect two pipes in a state in which they are inclined at a predetermined angle even in any complicated piping line.

[Brief description of drawings]

FIG. 1 is a perspective view showing a heat fusion apparatus according to an embodiment of the present invention.

FIG. 2 is a three-view drawing of an elbow showing an example of a pipe connected in the present embodiment.

FIG. 3 is a front view of an angled adjustment ring installed in the thermal fusion bonding apparatus of this embodiment.

FIG. 4A is a perspective view showing a reference posture of two pipes to be connected, and FIG. 4B shows a posture in which one pipe is slightly rotated from the reference posture to be joined. It is a perspective view.

FIG. 5 is a front view and a top view showing a state in which two pipes are connected in a standard posture.

FIG. 6 is a front view and a top view showing a state in which two pipes are connected to each other by slightly rotating them from a reference posture.

FIG. 7 is a perspective view showing a heat fusion apparatus according to another embodiment of the present invention.

8 is an exploded perspective view showing a main part of the heat fusion device used in the embodiment shown in FIG.

[Explanation of symbols]

 1, 1'Pipe 12 Jig on movable side 13 Jig on fixed side 17, 17 'Angled adjusting device

Claims (1)

[Claims] 1. A fixed-side jig and a movable-side jig, which are coaxially supported by pipes each having a bent portion, and the movable-side jig is moved forward to end the end surface of the pipe. A heat fusion device for a pipe made of a thermoplastic resin which is made to face each other and is fused by applying heat, in which the marking provided in advance on the pipe is fixed at a certain position on the pipe supporting portion of the fixed jig. Attach one angled adjustment ring to be fixed, then attach the other angled adjustment ring to the pipe support part of the movable side jig, and attach the marking of the pipe fixed to one of the jigs. , The reference position of the angled adjustment ring attached to this jig and the marking of the pipe supported by the other one of the jigs A heat fusion device for pipes made of a thermoplastic resin, characterized in that the pipes are rotated by a desired angle from a reference position so that the mutual fusion postures of the pipes are set to a desired angle.