JPS62165090A - Synthetic resin having flange and manufacture thereof - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a pipe made of a synthetic resin material, in which a connecting flange part made of synthetic resin is integrally formed on the outer peripheral surface of the cut end of the pipe. The present invention relates to a tube being formed and a method of manufacturing the same.

BACKGROUND ART Conventionally, there has been no synthetic resin pipe of this type in which a synthetic resin flange for connection is integrally fixed to the end of the pipe. Conventionally, in order to connect these types of synthetic resin pipes, for example, as shown in Fig. PtS7, a small diameter cylindrical portion 03a of a separately formed metal coupling 03 is inserted into the end face opening of the synthetic resin pipe 01. The small diameter cylindrical portion 0
The outer periphery of the synthetic 0 (fat pipe 01 portion) located on 3a was tightened at 1 m or multiple locations with a metal fastening fitting 02, and screwed using the threaded portion 03b. A common method has been to insert a formed coupling into the end of a tube and connect the tubes by threading the coupling.

<Problem to be solved by the invention, 1. χ〉However, such a conventional connection means has the drawback that the small diameter cylindrical portion 03a of the coupling 03 is inserted into and connected to the sm'g, which reduces the inner diameter of the tube and obstructs the smooth flow of the internal fluid. Furthermore, when a synthetic resin tube is used as a cable protection tube for electric wires, telephone lines, etc., there are two drawbacks: the presence of the small diameter cylindrical portion of this coupling hinders smooth insertion work. A particular problem arises when a synthetic resin pipe is used as a high-pressure fluid transport pipe that transports fluids such as water, chemicals, air, and gas at high pressure. Fluid leaks between the
The drawback is that it erupts into flames and is difficult to seal adequately.

Also, as shown in FIG.
When using the coupling 03 having 3b, when connecting the pipes, one cannot avoid the trouble of having to apply 1 tBv to one side of the fat pipe several times. The present inventor has broken away from the conventional idea of using couplings, and based on a new technical idea, has created a system that allows one connection to be made extremely easily, and which is easy to connect and free from concerns such as fluid leakage. This paper proposes a synthetic resin pipe that can be connected reliably and a method for manufacturing the same.

Means for Solving the Problems〉 That is, the synthesis in the present invention! To explain with reference to FIG. 1 and FIG.
Synthetic resin pipe (1) in which 2) is made of synthetic resin material
, the tube J at the W end position! 1t (2) A large diameter flange part (6), which is made of composite thin strips made of fat material wound in multiple layers and fused together, is integrated with the pipe! (2). This is a flanged synthetic tree pipe fused in a bonded state.

Further, the method for manufacturing a synthetic resin pipe according to the present invention will be explained using FIGS. 1 to 3 corresponding to Examples.
Is the tube wall (2) made of synthetic resin material? i'(1
), a thin strip of synthetic (A4 resin material) (6
1) is wound and fused in a multilayered manner, and the area where the flange is to be formed (2
+u), which has a width (2W) twice the predetermined flange width (111), is formed (60), and is fused and integrated with the pipe "1! (2). In this method, the resin 1X (60) and the tube wall (2) are simultaneously cut and separated along the planned cutting position (a).

<Function> When installing synthetic resin pipes with the above structure above ground or underground, the steps shown in Figure 2 are required to connect the pipes. The flange parts (6) and (6) are arranged facing each other, and there is a space between the two flange parts.
With the scale 7F (8) interposed and held, the bolts (7) are inserted into the bolt insertion connecting holes (61) formed in the width direction of the flanges (6), (6). (71)... and tighten. Alternatively, as shown in FIG. 5 and tJS6, both flanges (6), (6) may be connected by means of strongly clamping them from the outer periphery using a split locking fitting (9). <Example> The present invention will be described in detail below with reference to the drawings.

First, the manufacturing method will be explained based on the drawings shown in FIGS. 1 to 4.

In Fig. 3, (10) is a shaft body (mandrel in the example diagram) for forming the synthetic resin g (1), and a synthetic resin pipe (1) is attached to the side thereof from the proximal end to the roadside. 11 extruder (11) for extruding the synthetic resin strip material (21) to form the resin block (
60) A second extruder (12) that extrudes the forming thin strip material (61).
) and the first extrusion fi (11
) The measuring material (21) extruded from the mandrel (10)
The tube is guided upward and wound in a helical manner to form a synthetic resin tube (1) having a straight inner wall and a gently corrugated outer wall (2) in a spiral shape, as shown in FIG. 1.2. When this synthetic resin pipe (1) reaches a predetermined length, it is cut into the next stage, which has a wide width die (13) with thin extrusion ports (13a) at the top and bottom, as shown in the fjSJ diagram. 2 extrusion fi (
12), the width (
Thin synthetic resin band (61) with a slightly smaller width than 2w)
is extruded and guided onto the circumferential surface of the tube (1), and the synthetic resin W (1
) is moved in the same direction at the same speed as the formation movement speed of the extrusion Turn to form t14 fat mass (60).

After curing of the O(fat 1i (60)), as shown in figure f51, along the center line (planned cutting position>(n) of the resin mass (60), (34 fat mass ( 60) and the synthetic resin pipe (1) at the same time.This cutting is done by using a cutting machine (not shown) as in the T52 extrusion molding (12) described above.
) can be set to move in the direction of movement of the tube in accordance with the forming speed of the tube, thereby making it possible to cut the tube without interfering with the formation of the tube.

After that, if necessary (it is not necessary for flanges (6) and (6) shown in Figure 5.6), as shown in Figure 1.2, replace flanges (6) and (6). Surrounding self-recovery hole (61)
... is formed through it.

The flanged synthetic If fat pipe according to the present invention is a pipe having a structure formed in this way, and has a pipe end (4) and a flange (6).
) are formed on the same plane as the outer end surface (62) of the outer end surface (62).

The synthetic If IIW material may be polyolefin-based synthetic resins such as polyethylene and polypropylene, vinyl chloride-based synthetic resins, or other resins, and is not particularly limited, but both the pipe forming material and the resin mass forming material may be used. It is advantageous to use wood from trees of the same type because fusion and integration are easy and reliable.

The means for connecting the pipes with such a structure is the bolt (7) shown in FIG.
and a nut (71), and a split lock J' shown in Fig. 5.6. - Although the fastening means according to (9) are shown as typical ones, it is not limited to these means only, and other well-known fastening means can also be used. In addition, the structure of the synthetic +j (fatty pipe (1) itself may be a single pipe without an inner wall as shown in FIG. 5, or it may be a straight pipe. The shape of the inner wall does not necessarily have to be tubular.It goes without saying that the shape of the uneven waveform is not limited to the chevron waveform, but may also be other waveforms such as a semicircular arc waveform, a triangular waveform, a trapezoidal waveform, etc. stomach.

Furthermore, as shown in FIG. 3, the resin lump (60) is formed on the forming axis of the synthetic resin pipe (1), so that the shape of the pipe is less likely to be deformed, and the resin lump can be easily formed. However, it may be formed on the synthetic resin pipe (1) after curing.

Moreover, 4! according to the present invention! The thickness of the resin band for forming the J4 fat lump (60) is set to an appropriate thickness depending on the pipe diameter and the flange γ to be formed, but it is preferably as thin as about 2 to 5 mm, and at most 10 III fi thick. .

This means that the resin g, which requires considerable thickness in the radial direction,
For example, if you try to form g and (eo) using a thick band in just one turn, it will be difficult to form a beautiful seam, but if you wind it in multiple layers as a thin band, you will get a perfectly circular shape. It is easy to form resin 13%j, (60), and crimping from the outer periphery to the troughs (3) and peaks (5) of the pipe wall (2) is easy and reliable. It has the advantage of being easy to do.

Although the embodiments considered to be representative of the present invention have been described above, the present invention is not necessarily limited to the structure and method of these embodiments. It can be implemented with appropriate modifications within the scope of achieving the purpose and having the following effects.

<Effects of the Invention> As is already clear from the above description, the present invention does not require synthesis or synthesis when inventing products. Since the synthetic resin flange part is integrally fused to the H1117 pipe itself, the work of connecting the pipes can be made much easier than before, and the fluid inside the pipe can be removed from the connecting part. Since it is reliably prevented from flowing out or spouting out, it can be used with confidence without any fluid leaking out or spouting out.Furthermore, the flange part is formed by multi-layer winding of thin strip material. Since the flange part and the pipe are attached extremely reliably, it is possible to obtain a flanged pipe with a securely integrated structure in which the flange part does not separate from the pipe even under large pressure inside the pipe. We have now been able to do it.

Furthermore, in the invention of the manufacturing method, in manufacturing the flanged synthetic Ul resin pipe that can be expected to have such great effects, two parts of a predetermined flange width are formed across both sides of the planned flange formation position. By forming a resin block with twice the width, cutting it together with the pipe wall, and forming flanges at both ends of the cut and separated pipes, the process can be carried out extremely efficiently. It is something that

[Brief explanation of drawings]

Figures 1 to 4 are diagrams showing one embodiment of the present invention.
The figure is a medium-heat longitudinal cross-sectional view of the main part of a synthetic resin pipe, Figure 2 1±11
[Conclusion 1 u 11 2 m 9 yen This book shows a cutaway perspective view of the rear mater bar, Fig. 3 is a schematic diagram showing the manufacturing method, Fig. 4 is a front view showing the extrusion port of the second extrusion port, Fig. Fig. 5 is a central vertical cross-sectional view of the joint section showing another connecting posture of the interposer I & resin pipe, Fig. 6 is a side view of the same, and Fig. 7 is a central vertical cross-sectional view showing the conventional pipe end joint structure. . In the figure, (1) is a synthetic resin pipe, (2) is a pipe wall, (6) is a flange, (60) is a resin lump, (a) is a planned cutting position, (
u, ) indicates the flange width. Patent Applicant Fumi Kanao Ropa's Home, -: 6.1/ Figure 3 1211 13a Figure 5 Figure 6 Figure 7 ○3

Claims (1)

[Scope of Claims] [1] In a synthetic resin pipe (1) in which the pipe wall (2) is formed of a synthetic resin material, a thin film made of a synthetic resin material is provided on the outer peripheral surface of the pipe wall (2) at the pipe end position. A flanged synthetic resin pipe in which a large-diameter flange portion (6) made of multi-layered strips wound and fused together is integrally fused to the pipe wall (2). [2] The flanged composite according to claim 1, wherein the outer end surface (62) of the flange portion (6) and the pipe end (4) of the pipe (1) are formed on substantially the same plane. resin tube. [3] The flange according to claim 1, wherein the flange portion (6) has a connecting hole (61) for inserting the bolt (7) along the width (w) direction. Synthetic resin pipe. [4] Pipe (1) whose pipe wall (2) is formed into an uneven corrugated shape
A flanged synthetic resin pipe according to claim 1. [5] Claim [1] or [4], which is a pipe (1) in which the pipe wall (2) is formed in a spiral corrugated pattern.
Synthetic resin pipe with flanges as described in . [6] The flanged synthetic resin pipe according to claim 1, wherein the pipe (1) has a straight pipe wall (2). [7] The flanged synthetic resin pipe according to claim [1], wherein the resin material of the pipe (1) and the flange portion (6) are made of the same synthetic resin material. [8] Pipe whose pipe wall (2) is made of synthetic resin material (
A thin strip of synthetic resin material ( 61) is wound and fused in a multilayered manner, and the width (2w) is twice the predetermined flange width (w) over the entire width of the planned flange formation area (2w).
While forming a resin mass (60) having a
2), and then the resin mass (60) and the pipe wall (2) are simultaneously cut and separated along the planned cutting position (u). [9] During the manufacturing process of the pipe (1), a resin mass for flange formation (
60) The method for manufacturing a flanged synthetic resin pipe according to claim [8], wherein the method comprises simultaneously forming the flanged synthetic resin pipe. [10] The flange-forming resin lump (60) is formed on the pipe-forming shaft (10) during the manufacturing process of the pipe (1), as described in claim [8] or [9]. A method for manufacturing flanged synthetic resin pipes. [11] The thin strip material (61) is a thin strip material whose width is slightly smaller than the double width (2w) of the predetermined flange width (w). A method for manufacturing flanged synthetic resin pipes. [12] The method for manufacturing a flanged synthetic resin pipe according to claim [8], wherein the thin strip material (61) has a thickness of 2 mm to 5 mm.