JP6158458B1 - Tube with hook - Google Patents

Abstract

The present invention provides a resin tube having a flange suitable for connection by a loose flange. A tube 10 with a flange according to the present invention includes a tubular tube body 20 made of a resin material, and a tube portion 30 made of the same material as the tube body and fitted on the outer periphery of the tube body. And a cylindrical portion having an integrated portion 40 whose tip is fused to the tube main body, and the tube main body, which is made of the same material as that of the tube main body. And a flange portion 50 whose diameter is increased. [Selection] Figure 2

Description

  The present invention relates to a flanged tube in which a flange is integrally formed at the distal end of the tube, and more specifically to a flanged tube suitable for connection by a loose flange.

  Tubes made of fluororesin are used to supply and transfer raw material fluids, cleaning fluids, fuel fluids, etc. in various devices for manufacturing, cleaning, assembly, etc. in the fields of electronics such as semiconductors, pharmaceuticals, and biotechnology. ing.

  These tubes need to be connected to each other or to the equipment. Therefore, in Patent Document 1, the tip of the tube is expanded in diameter by flaring, and a joint is attached to the expanded diameter portion. The joint is composed of a tubular joint member inserted into the inner surface of the enlarged diameter portion and the outer periphery of the tube, and is composed of a joint member and a cap nut. The enlarged diameter portion is sandwiched between the joint member and the cap nut, The tube is attached to the joint by screwing.

Japanese Patent Laid-Open No. 10-318475

  It is desirable to connect the tubes directly without using a joint made of different members. Therefore, the inventors tried to form a flange portion that was flared at the tube tip to expand the diameter substantially perpendicularly in the axial direction, but to butt the flange portions and fasten them with a loose flange.

  However, when the flange portion 91 is formed at the tip of the tube 90 by flaring, the flange portion 91 becomes thinner as it goes to the outer peripheral side as shown in FIG. 7, and the parallelism of the front and back surfaces of the flange portion 91 can be maintained. In addition, the thickness of the formed flange portion 91 is thin and the outer diameter of the flange portion 91 is also reduced. As a result, the strength is insufficient and it is difficult to connect the tubes in an airtight and liquid tight manner. there were. This is thought to be due to the fact that the circumference of the tube material is insufficient when flared.

  The objective of this invention is providing the resin-made tubes which have a collar part suitable for the connection by a loose flange.

The flanged tube according to the present invention is
A tubular tube body made of a resin material;
A cylindrical portion that is made of the same material as the tube main body and fits on the outer periphery of the tube main body, and has a cylindrical portion having an integrated portion whose tip is fused to the tube main body,
Consists of the same material as the tube body, continuous with the tip of the integrated part, and a flange that expands in a direction substantially perpendicular to the tube body;
With

  The said collar part shall be what the said tube main body and the said cylinder part melt | fused.

  Regarding the thickness D1 of the tube main body, the thickness D2 of the cylindrical portion, and the thickness D3 of the flange portion, it is desirable that D1 <D3 and D2 <D3.

  Further, it is desirable that the integrated portion expands in an outward arc shape toward the tip and is continuous with the flange portion.

  Furthermore, it is desirable that the flange has a parallelism of front and back surfaces of ± 0.7 mm or less on the inner peripheral side and the outer peripheral side of the flange.

  The resin material is preferably a tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer.

  According to the flanged tube of the present invention, the distal end of the tube body is reinforced by the cylindrical portion. Moreover, the collar part can be comprised thicker than a tube main body and a cylinder part by fuse | melting and integrating a tube main body and a cylinder part, and has high intensity | strength. Furthermore, when the flange portion is formed by flaring, the resin material provided can be increased by expanding the diameters of the tube body and the tip of the tube portion, compared to the flaring processing of only the tube body. Can improve the meat around the part. That is, since the amount of the resin material used for the buttocks can be increased, the parallelism of the buttocks can be increased.

  The tube with a flange of the present invention includes the above-described flange portion, so that the flange portions are brought into contact with each other and can be connected in an air-tight and liquid-tight manner by a loose flange.

FIG. 1 is a plan view of a flanged tube according to an embodiment of the present invention. FIG. 2 is a cross-sectional view along the axial center of the flanged tube of the present invention. 3 is a cross-sectional view taken along line III-III in FIG. FIG. 4 is a front view of the flanged tube of the present invention as viewed from the opening edge side. Drawing 5 is an explanatory view showing one embodiment of a process of forming a collar part. FIG. 6 is an explanatory view showing a process of connecting the flanged tubes of the present invention with loose flanges. FIG. 7 is a plan view of the prototyped tube with a flange.

  Hereinafter, the flanged tube 10 according to an embodiment of the present invention will be described with reference to the drawings.

  1 is a plan view of a flanged tube 10 according to an embodiment of the present invention, FIG. 2 is a sectional view taken along the axial direction, FIG. 3 is a sectional view taken along line III-III in FIG. 1, and FIG. It is the front view seen from. As shown in the figure, the flanged tube 10 includes a tubular tube body 20, a tubular portion 30 that fits on the distal end side of the tube body 20, and an integrated portion 40 in which the tube body 20 and the tubular portion 30 are integrated. The tip of the lever has a flange portion 50 whose diameter is increased substantially vertically in the axial direction.

  The tube main body 20, the cylinder part 30, the integrated part 40, and the flange part 50 can all be made of the same heat-meltable resin material such as a fluororesin material. As the fluororesin material to be employed, tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA) is most desirable from the viewpoint of stability to a high-purity chemical solution. Other examples of the fluororesin material include tetrafluoroethylene-hexafluoropropylene copolymer (FEP) and tetrafluoroethylene-hexafluoropropylene-vinylidene fluoride terpolymer. The fluororesin material is not limited to the above.

  As shown in FIG. 2, the flanged tube 10 of the present invention is integrated with the tube main body 20 and the cylindrical portion 30 only by fusion as the integrated portion 40, except for the integrated portion 40. As shown by 42, the cylindrical part 30 is in a state of being fitted and closely attached to the tube main body 20, and is not fused and integrated.

  The tube body 20 can have a diameter of 3 mm to 60 mm, a thickness of 0.5 mm to 5 mm, and a length of 0.05 m to 200 m, for example. Moreover, the tube main body 20 can select various shapes, such as a straight tube, a spiral tube, and a bending tube.

  The tubular portion 30 is fitted into the tube main body 20 to reinforce the vicinity of the distal end facing the loose flange 70 described later when the flanged tubes 10 and 10 are connected to each other. Moreover, the tube main body 20 and the cylinder part 30 are fused and integrated in the integrated part 40, so that the integrated part 40 can be thickened and the strength is also improved. The cylinder part 30 can be 15 mm to 50 mm in length, preferably 20 mm to 40 mm. It is more desirable that the cylindrical portion 30 has a length that protrudes from the loose flange 70 when connected by the loose flange 70 shown in FIG. 6.

  As shown in the figure, it is desirable that the integrated portion 40 has a shape expanded in an outward arc shape toward the tip. By making the integrated portion 40 into an arc shape instead of an angular shape, it is possible to prevent stress from concentrating when the flanged tubes 10 and 10 are connected, and to reduce the occurrence of cracks and breaks.

  As shown in FIGS. 1 to 4, the integrated portion 40 is bent in a substantially vertical direction and is continuous with the flange portion 50. The flange part 50 can be formed by, for example, fusing and integrating the tube body 20 and the cylinder part 30 together. As shown in FIG. 2, when the thickness of the tube main body 20 is D1, the thickness of the cylindrical portion 30 is D2, and the thickness of the collar part is D3, the collar part 50 has D1 <D3 and D2 <D3. It is desirable that Thereby, the strength of the flange portion 50 can be provided, and when the flanged tubes 10 and 10 are connected to each other by the loose flange 70, these joint strengths can be ensured, and the air tightness and liquid tightness of the connection portion can be improved. it can. Preferably, D3 is 1.5 times or more thicker than D1 or D2, more preferably 1.8 times or more thicker.

  The overhang length of the flange 50 from the tube body 20 is 10 mm to 50 mm, preferably 15 mm to 30 mm, and the thickness is 1.5 mm to 4 mm, preferably 2 mm to 3 mm. The front and back surfaces of the flange 50 are preferably formed so that the parallelism between the inner peripheral side and the outer peripheral side is ± 0.7 mm or less, and more preferably ± 0.5 mm or less. Thereby, when the buttocks 50 and 50 are brought into contact with each other, the buttocks can be brought into close contact with each other, and air tightness and liquid tightness are improved.

  The flanged tube 10 having the above-described configuration can be manufactured, for example, as shown in FIG.

  As shown in FIG. 5A, a straight tubular tube body 20 is prepared, and its tip is softened by heating, and the tip is turned as shown by an arrow A in FIG. 5A and FIG. 5B. Turn over and cover the tube body 20. A part of the cylindrical part covering the outer peripheral side of the tube main body 20 becomes the cylindrical part 30. At this time, the tubular portion covered with the tube body 20 is not fused, and the tubular portion is in close contact with the tube body 20.

  Subsequently, as shown by an arrow B in FIG. 5B and FIG. 5C, the tip is pushed into a heated mold 60 and is expanded and bent by flare processing, so that the integrated portion 40 and the flange 50 Form. For example, the mold 60 has a tube 61 into which a convex mold 61 having an arcuate curved portion corresponding to the integrated portion 40 and a hole 62 into which the cylindrical portion 30 can be inserted are opened and integrated. It can be configured by an annular mold 64 having an arcuate curved portion corresponding to the portion 40 and an annular recess 63 corresponding to the flange portion 50. And while heating these dies 61 and 64 to the softening point or more of the fluororesin material of the tube main body 20, the tube main body 20 and the cylindrical portion 30 are inserted into the mold 60 by turning the double-ended tube main body 20 upside down. While the tip of the tube is softened and fused and integrated into the recess 63, the flange portion 50 that extends substantially perpendicular to the axial direction is formed, and the flange portion 50 is connected to the tube body 20 and the tube portion 30 in an integrated manner. The control portion 40 is formed, and the flanged tube 10 of the present invention is manufactured.

  In FIG. 5, the tube main body 20 is turned over to form the cylindrical portion 30. However, a cylindrical portion 30 having an inner diameter that fits around the outer periphery of the tube main body 20 is separately manufactured, and the cylindrical portion 30 is attached to the tube main body 20. After fitting, it may be flared. Of course, the flanged tube 10 can also be produced by methods other than these.

  The flange 50 has a flared end of the double tube body 20 so that the amount of the resin material entering the annular recess 63 of the mold 60 is increased as compared with the case where only the tube body 20 is flared. Since the circumference of the meat can be improved, the outer diameter and thickness can be secured, and the parallelism of the front and back surfaces can be secured by the molds 61 and 64.

  And although the tube main body 20 and the cylinder part 30 are not fusion-integrated (code | symbol 42), when the cylinder part 30 closely_closes and surrounds the outer peripheral side of the tube main body 20, the vicinity of the front-end | tip of the tube 10 with a hook Can be reinforced as much as possible.

  The barbed tube 10 having the above-described configuration is used to supply raw material fluid, cleaning fluid, fuel fluid, etc. in devices such as semiconductors such as semiconductors, manufacturing, cleaning, and assembly in the fields of medicine, biotechnology, etc. Can be used for transport. Examples of the fluid that passes through the inside of the flanged tube 10 include liquid and gas, and powder and particles are mixed with the liquid and gas as necessary. These fluids may be either flammable or nonflammable.

  As shown in FIG. 6, the obtained flanged tubes 10, 10 can be connected by butting the flange portions 50, 50 and fastening the loose flanges 70, 70 together. The loose flange 70 includes an insertion hole 71 and a plurality of bolt holes 72 into which the cylindrical portion 30 is loosely fitted. Then, in a state where the flanges 50 and 50 are butted together, the cylindrical part 30 is passed through the insertion hole 71, the bolt holes 72 and 72 are aligned with each other, and the loose flanges 70 and 70 are fastened with bolts and nuts 74. . As a result, the flange portions 50 and 50 are in close contact with each other, and the flanged tubes 10 and 10 are connected while ensuring airtightness and liquid tightness. Moreover, since the cylinder part 30 surrounds the tube main body 20, the bending and bending of the tube main body 20 in the front-end | tip of the tube 10 with a hook can also be reduced.

  Note that the loose flange 70 is preferably tapered in an arc shape in accordance with the curved portion shape of the integrated portion 40 at the edge of the insertion hole 71.

  The above description is for explaining the present invention, and should not be construed as limiting the invention described in the claims or limiting the scope thereof. Further, the configuration of each part of the present invention is not limited to the above-described embodiment, and various modifications can be made within the technical scope described in the claims.

DESCRIPTION OF SYMBOLS 10 Tube with collar 20 Tube main body 30 Tube part 40 Integrated part 50 collar

Claims (6)

A tubular tube body made of a resin material;
A cylindrical portion that is made of the same material as the tube main body and fits on the outer periphery of the tube main body, and has a cylindrical portion having an integrated portion whose tip is fused to the tube main body,
Consists of the same material as the tube body, continuous with the tip of the integrated part, and a flange that expands in a direction substantially perpendicular to the tube body;
A tube with a hook. The collar portion is a fusion of the tube body and the tubular portion.
The flanged tube according to claim 1. About the thickness D1 of the tube main body, the thickness D2 of the cylindrical portion, and the thickness D3 of the flange portion, D1 <D3 and D2 <D3.
The flanged tube according to claim 1 or 2. The integrated portion expands in an outward arc shape toward the tip and is continuous with the flange portion.
A tube with a flange according to any one of claims 1 to 3. In the collar part, the parallelism of the front and back surfaces is ± 0.7 mm or less on the inner peripheral side and the outer peripheral side of the collar part.
The tube with a flange according to any one of claims 1 to 4. The resin material is a tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer.
The tube with a flange according to any one of claims 1 to 5.

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