JP4384569B2 - Pipe fitting and manufacturing method thereof - Google Patents

Description

The present invention is used for, for example, a metal vertical pipe for draining rainwater, and in particular, a pipe joint used for connecting two pipes arranged along different axial directions, and its manufacture. Regarding the method.

Conventionally, as a pipe joint for laying a metal vertical rod, an elbow shape having a pipe connection portion at both ends and having a cylindrical shape curved at an intermediate position between the two pipe connection portions has been used. . As such a pipe joint, for example, one of the pipe connection portions is an expanded pipe portion whose inner and outer diameters are expanded in order to receive and connect the vertical rod to the inside thereof, and the other pipe connection portion is the outer side thereof. What is known as a reduced tube portion whose inner and outer diameters are reduced in order to fit and connect the above-mentioned vertical hook (for example,
See Patent Document 1. ).
Japanese Utility Model Publication No. 5-71320 (Page 2-5, Fig. 1)

However, in the pipe joint, since one of the pipe connection portions is an expanded pipe portion, a step due to the pipe connection portion is generated on the outer surface, and the appearance is compared with the outer surface formed by a uniform plane. It gets worse. In particular, when the vertical rod is connected to each of the pipe connecting portions, the outer surface from one vertical rod through the pipe joint to the other vertical rod is one of the expanded pipe portions. Only the pipe connecting portion protrudes from the outer surface, and this step becomes conspicuous.

Moreover, in the said pipe joint, since the bending part is formed in the rounded shape which curves, since the outline along an extension direction is comprised with a curve and a straight line, there is no sense of unity in appearance, and only a straight line It does not give a sophisticated impression like a structured appearance.

Therefore, an object of the present invention is to provide a bent-shaped pipe joint having an excellent appearance without incurring an increase in manufacturing cost as compared with a conventional pipe joint and a method for manufacturing the same.

In order to solve the above-mentioned problem, the pipe joint according to claim 1 has pipe connecting portions at both ends,
It is a pipe joint that bends at an intermediate position between the pipe connection parts, and the pipe connection parts are formed at both ends,
It has a cylindrical shape bent at an intermediate position between the pipe connecting portions, and has an inner cylinder having a flange that goes around the outer wall surface of the bent portion, and an inner diameter and a uniform outer diameter that allow the inner cylinder to be inserted. An outer cylinder member that is cylindrical and formed of metal is divided by a plane that is inclined with respect to the axial direction of the outer cylinder member, and has an equal inclination with respect to the axial direction of the outer cylinder member. Two external cylinders having split surfaces, and the two external cylinders have functions of the pipe connecting portions so that the split surfaces of the external cylinders face each other via the flange. In order not to be damaged, the both split surfaces are fixedly attached by being externally inserted into the inner cylindrical body in contact with the flange.

The method for manufacturing a pipe joint according to claim 2 is a manufacturing method for manufacturing a pipe joint having a pipe connecting portion at both ends and bending at an intermediate position between the both pipe connecting portions. Forming an inner cylindrical body having a cylindrical shape bent at an intermediate position between the two pipe connecting portions, and providing a bent portion around the outer wall surface of the bent portion at the bent portion of the inner cylindrical body, By dividing an outer cylinder member having a cylindrical shape having an inner diameter and a uniform outer diameter enabling insertion of a cylindrical body and made of metal with a surface inclined with respect to the axial direction of the outer cylinder member Forming two outer cylinders having split surfaces having an equal inclination with respect to the axial direction of the outer cylinder member, so that the two split surfaces of the two outer cylinders face each other via the flange, and In order not to impair the functions of the two pipe connecting portions, the both outer cylinders are Each outer inserted from both ends of the part cylinder, characterized in that it comprises securing the two external cylindrical body in a state in which the both split face is in contact with each of the flange to the inner cylinder.

According to the pipe joint according to claim 1, it is possible to obtain a reliable water stop by the integrally formed internal cylinder, and it is more uniform by the both external cylinders inserted into the internal cylinder. Can be obtained. In addition, since the both outer cylinders are in contact with the flanges so that the divided surfaces thereof are opposed to each other via the flange, the two outer cylinders in the bent portion of the pipe joint are mutually connected. The joint is formed by the flanges and the two split surfaces of the external cylinders that are in contact with both ends of the flanges. For this reason, since the contour line along the extending direction is composed of the external cylinders and the seams of the two external cylinders, the contour line is composed of straight lines. The appearance is improved as compared with a conventional pipe joint formed in a rounded shape.

According to the method for manufacturing a pipe joint according to claim 2, since the two outer cylinders are formed by dividing the outer cylinder member by a surface inclined with respect to the axial direction, On the other hand, it is possible to easily form the two outer cylinders that have the dividing surfaces that are inclined equally to each other and that have a uniform appearance. In the bent portion of the pipe joint, the two outer cylinders and the flange interposed between the two outer cylinders, that is, the arc formed by the split surfaces of the two outer cylinders contacting the flange and the flange Since the external appearance is constituted by the flange, the contour line along the extending direction is constituted by a straight line, and the external appearance is improved as compared with the conventional pipe joint in which the bent portion is formed in a round shape.

Moreover, since the two said external cylinders are each inserted from the both ends of the said internal cylinder, the color and texture of the surface of the said pipe joint can be made uniform easily. Furthermore, since the inner cylinder is integrally formed as a bent cylindrical shape, the pipe joint having a reliable water stop can be manufactured without requiring high processing accuracy.

The inner cylinder can be integrally formed by aluminum die casting or injection molding of a plastic material.

The flange can be provided integrally with the inner cylinder when the inner cylinder is formed. Further, the flange can be provided by being attached to the bent portion of the molded inner cylinder from the outside instead of being integrally provided at the time of molding.

According to the pipe joint according to the present invention, the integrally formed internal cylindrical body has a certain water stoppage, and the two external cylindrical bodies inserted into the internal cylindrical body have a uniform appearance. Have. In addition, the bent portion is formed in a rounded shape because the joint of the outer cylinders is formed by the flanges and the split surfaces of the outer cylinders that are in contact with the flanges. Compared to the pipe joint made, it has an excellent appearance.

In addition, according to the method for manufacturing a pipe joint according to the present invention, the two outer cylinders are formed by dividing the outer cylinder member by a surface that is inclined with respect to the axial direction. On the other hand, it is possible to easily form the two outer cylinders that have the dividing surfaces that are inclined equally to each other and that have a uniform appearance. By inserting the both outer cylinders into the inner cylinder, the pipe has an excellent appearance compared with conventional pipe joints and has a certain water-stopping property without causing an increase in manufacturing cost. A joint can be manufactured.

  The present invention will be described in detail with reference to the embodiment shown in FIGS.

FIG. 1 shows a pipe joint 10 having an L shape as a whole according to the first embodiment. FIG. 2 is a longitudinal sectional view of the pipe joint 10, and FIG. 3 shows the pipe joint 10 in the manufacturing process.

As shown in FIG. 1, the pipe joint 10 includes an internal cylinder 11 (see FIG. 3) and an external cylinder that is inserted and bonded to the outside of the internal cylinder so as to cover the internal cylinder. Body 12 and external cylinder 1
3.

As shown in FIG. 3, the inner cylinder 11 has a first cylindrical portion 14 having a cylindrical shape and a cylindrical shape, and the first cylindrical portion has an axis perpendicular to the axis of the first cylindrical portion. And a second cylinder portion 15 communicating with the cylinder portion. In the first embodiment, the inner cylinder 11 is formed by die casting using an aluminum die cast, that is, an aluminum alloy as a material. The inner cylinder 11 can also be integrally formed by injection molding of a plastic material such as vinyl chloride resin.

The 1st cylinder part 14 exhibits the cylindrical shape prescribed | regulated by the surrounding wall of uniform thickness and uniform aperture. A first pipe connecting portion 16 is formed at one end of the first cylindrical portion 14. First pipe connection 1
The outer peripheral surface of 6 is formed with a taper for facilitating connection of an aluminum lever 30 described later.

The second cylindrical portion 15 has a cylindrical shape defined by a peripheral wall having a thickness and a diameter equal to those of the first cylindrical portion 14. A second pipe connecting portion 17 is formed at one end of the second cylindrical portion 15. A taper is formed on the outer peripheral surface of the second pipe connection portion 17 for facilitating the connection of an aluminum vertical rod 30 described later.

In the inner cylindrical body 11, the first cylindrical portion 14 and the second cylindrical portion 15 communicate with each other so that the axes thereof are orthogonal to each other. It has a hollow elliptical shape with a degree of inclination. This joint surface becomes a bent portion 18 (see FIG. 2) of the inner cylinder 11.

The bent portion 18 is provided with a flange 19 around the outer wall surface 18a. Flange 1
9 rises with a certain thickness from the outer wall surface 18a of the bent portion 18 along a plane defined by the bent portion 18, that is, a plane that makes an inclination of 45 degrees with respect to both axial lines of both the cylindrical portions 14 and 15. .

As shown in FIG. 3, the outer cylindrical body 12 has a cylindrical shape defined by a peripheral wall having a uniform aperture and a uniform thickness that allows the first cylindrical portion 14 to be inserted, that is, a uniform inner diameter and an outer diameter. It exhibits a cylindrical shape that extends in diameter. The outer cylinder 12 has a hollow circular end surface 12a defined by the thickness of the outer cylinder located on a surface orthogonal to the axis of the outer cylinder at one end thereof. The outer cylinder 12 has a hollow elliptical end face 12b defined by the thickness of the outer cylinder located on a surface that makes an inclination of 45 degrees with respect to the axis of the outer cylinder at the other end.

The thickness of the outer cylinder 12 is such that the outer wall surface 12c of the outer cylinder 12 is aligned with the front end surface 19a of the flange 19 in a state where the outer cylinder is extrapolated to and bonded to the first cylinder portion 14. It is formed in the size. The outer cylinder 12 has a length dimension from one end to the other end of the outer cylinder 12 from the front of the first pipe connection portion 16 provided in the first cylinder portion 14 to the other end of the first cylinder portion 14. It is formed equal to the dimensions. As shown in FIG. 1, the outer cylindrical body 12 is inserted into the first cylindrical portion 14 so that the other end is in contact with the flange 19. The first pipe connecting portion 16 is not covered by the external cylinder in a state where the external cylinder 12 is inserted and is exposed to the outside.

As shown in FIG. 3, the outer cylinder 13 extends in a cylindrical shape defined by a peripheral wall having a uniform aperture and a uniform thickness equal to the outer cylinder 12, that is, with a uniform inner diameter and outer diameter. Presents a cylindrical shape. The outer cylinder 13 has a hollow circular end surface 13a defined by the thickness of the outer cylinder 13 located on a surface orthogonal to the axis of the outer cylinder at one end thereof. The outer cylinder 13 has a hollow elliptical end surface 13b defined by the thickness of the outer cylinder 13 located on a surface that makes an inclination of 45 degrees with respect to the axis of the outer cylinder at the other end.

The outer cylinder 13 has a length dimension from one end to the other end of the outer cylinder 13 from the front of the second pipe connection portion 17 provided in the second cylinder portion 15 to the other end of the second cylinder portion 15. It is formed equal to the dimensions. As shown in FIG. 1, the outer cylinder 13 is inserted into the second cylinder portion 15 so that the other end abuts on the flange 19. The second pipe connecting portion 17 is not covered by the external cylinder when the external cylinder 13 is inserted, and is exposed to the outside.

In a state in which both the outer cylinders 12 and 13 are inserted into the inner cylinder 11, both the pipe connecting portions 16, 1
7 is exposed to the outside without being covered by both external cylinders 12, 13.
17 can be connected to an aluminum vertical rod 30 indicated by a two-dot chain line in FIG. 2, and this connection allows the pipes to communicate with each other with their axes orthogonal to each other.

As shown in FIG. 2, the outer wall surface 10 a of the pipe joint 10 is formed from the outer wall surface 12 c of the outer cylinder 12 to the flange 19 by forming the outer cylinder 12, the outer cylinder 13, and the flange 19 as described above. From the front end surface 19a to the outer wall surface 13c of the outer cylindrical body 13, it is constituted by a smooth flat surface having no step.

  Next, the manufacturing method of the above-described pipe joint 10 will be described.

The L-shaped inner cylinder 11 is formed by aluminum die casting. The inner cylinder 11 includes a first cylinder part 14 having a first pipe connection part 16 formed at one end and a second pipe connection part 17 at one end.
Is formed, and the second cylinder portion 15 communicates with the first cylinder portion 14 so that the axes thereof are orthogonal to each other;
And a flange 19 provided on the outer wall surface 18a of the bent portion 18 defined by the joint surfaces of both the cylindrical portions 14 and 15.

An outer cylinder member (not shown) having a uniform bore diameter and a uniform wall thickness that allows insertion of both tube portions 14 and 15, that is, a cylindrical shape that extends with a uniform inner diameter and outer diameter. prepare. In the first embodiment, the outer cylinder member is formed by cutting and processing an aluminum vertical rod 30 connected to both pipe connecting portions 16 and 17. For this reason, the outer cylinder member has a uniform and smooth surface as a whole.

The outer cylinder member is divided along a plane that is inclined by 45 degrees with respect to the axial direction thereof. By this division, two cylindrical bodies having divided surfaces (12b) and (13b) that are inclined by 45 degrees with respect to the axis are formed. If necessary, both tube portions 14, 1 are exposed so that both tube connecting portions 16, 17 provided on both tube portions are exposed when the two tube bodies are inserted into both tube portions 14, 15, respectively.
Cut to 5 length. Thereby, the outer cylinder 12 and the outer cylinder 13 are formed.

The outer cylinder 12 has one end defined by a hollow circular end surface 12a along a plane orthogonal to the axis, and a hollow elliptical end surface 12b along a plane inclined at 45 degrees with respect to the axis. The other end of the first tube portion 14 from the other end of the first tube portion 14 to the front of the first tube connection portion 16 provided in the first tube portion. Is equal to the length dimension of External cylinder 13
Is defined by one end defined by a hollow circular end surface 13a along a plane orthogonal to the axis, and another end defined by a hollow elliptical end surface 13b along a plane inclined by 45 degrees with respect to the axis. And a length dimension from one end to the other end is a length dimension from the other end of the second cylindrical portion 15 to the front side of the second pipe connecting portion 17 provided in the second cylindrical portion. be equivalent to.

As shown in FIG. 3, both end faces 12b that define the other ends of both outer cylinders 12, 13 respectively.
The outer cylindrical body 12 is inserted into the first cylindrical portion 14 of the inner cylindrical body 11 and the outer cylindrical body is inserted into the second cylindrical portion 15 of the inner cylindrical body 11 so that 13 b faces each other via the flange 19. Insert 13 (
See arrow A1. ). At this time, the end surface 12b defining the other end of the outer cylinder 12 and the flange 19
The one side surface 19b is brought into surface contact, and the end surface 13b defining the other end of the external cylinder 13 and the other side surface 19c of the flange 19 are brought into surface contact.

Thus, both end faces 12b, 13b of both external cylinders 12, 13 are both side faces 1 of the flange 19.
Both the outer cylinders 12 and 13 are fixed to the inner cylinder 11 in a state of surface contact with 9b and 19c. In the first embodiment, the outer cylinders 12 and 13 are fixed to the inner cylinder 11 with an adhesive. The outer cylinders 12 and 13 may be fixed to the inner cylinder 11 by filling a caulking material between the outer cylinders 12 and 13 and the inner cylinder 11. The both external cylinders may be fixed to the internal cylinder 11 by caulking the external cylinders with the external cylinders 12 and 13 inserted, and the fixing means is not limited to the first embodiment. Thereby, the pipe joint 10 by which both the external cylinders 12 and 13 were inserted by the internal cylinder 11 can be manufactured.

In the pipe joint 10 according to the first embodiment, both the outer cylinders 1 that cover both the cylinder portions 14 and 15 of the inner cylinder 11 are provided.
2 and 13 are formed by dividing the outer cylindrical member made of a single metal member and having a simple cylindrical shape, so that the outer cylindrical bodies 12 and 13 have similar appearances to each other. Therefore, the inner cylinder 11 has an excellent appearance with a sense of unity as a whole. Further, since the outer cylinder member is processed by cutting the aluminum vertical rod 30 formed by extruding a metal, the surface thereof has a uniform and smooth appearance. For this reason, it is formed integrally by casting, for example, and has an excellent appearance as compared with a conventional pipe joint.

In the pipe joint 10, since both the outer cylinders 12 and 13 that are extrapolated to the inner cylinder 11 are formed of the aluminum vertical rods 30, as shown in FIG. There is no difference in level between both the aluminum vertical rods 30 and the external cylinders 12 and 13 that are inserted and connected, and both the aluminum vertical rods 30 and the external cylinders 12 and 13 are integrated and excellent. Appearance.

Moreover, in the pipe joint 10, since the flow path is formed by the integrally formed internal cylindrical body 11, it has a certain water-stopping property.

In the pipe joint 10, in the bent portion 10 b, a mutual seam between the external cylinders is formed by the flange 19 and the external cylinders 12 and 13 in surface contact with the flange. The flange 19 has a certain thickness, and both end faces 12 of both external cylinders 12 and 13 that abut against the flange.
Since b and 13b are defined by the same dividing plane, the mutual seams of the two outer cylinders 12 and 13 are line-symmetric with respect to the flange 19 as an axis. In addition, the outer wall surface 1 of the outer cylinder 12
From 2c to the outer wall surface 13c of the outer cylinder 13 through the front end surface 19a of the flange 19, it is comprised by the gentle plane without a level | step difference. Therefore, the bent portion 18 of the pipe joint 10 is formed by joining two metal members by welding, and shrinkage occurs in the vicinity of the joint portion due to a temperature change during welding, or a distorted weld mark is formed at the joint portion. Compared to conventional pipe joints, it has an excellent appearance.

In the pipe joint 10, the flange 19 and both end faces 12 b and 13 b of the external cylinders 12 and 13 are in surface contact with each other at the bent portion 10 b, so that both ends that become split surfaces when the outer cylinder member is divided are used. The surfaces 12b and 13b are not exposed to the outside and have high safety.

Since the pipe joint 10 has a configuration covered with both external cylinders 12 and 13 made of metal, the pipe joint 10 is integrally formed by pipe joint formed by welding two metal members or casting. Compared to conventional pipe joints, it has strength that is not inferior.

Therefore, according to the pipe joint 10 which concerns on Example 1, compared with the conventional pipe joint, it has the outstanding external appearance, without causing a rise in manufacturing cost.

According to the method for manufacturing the pipe joint 10 according to the first embodiment, for example, a pipe having the above-described features as compared to applying a casting method with high processing accuracy in order to obtain a surface with uniform color and texture. The joint 10 can be manufactured without causing an increase in manufacturing cost.

In addition, according to the manufacturing method described above, the dividing surfaces having the same inclination with respect to the axial direction (
Both external cylinders 12 and 13 having 12b) and (13b) and having a uniform external appearance can be easily formed.

According to the manufacturing method described above, since the pipe joint 10 obtains a certain water stoppage by the integrally formed internal cylinder 11, it is possible to easily manufacture the pipe joint 10 having a certain water stoppage. it can.

In addition, since the internal cylinder 11 of Example 1 is formed by aluminum die-casting, the bent portion 10b of the pipe joint 10 includes a flange 19 formed of an aluminum alloy and both external cylinders 12 formed of an aluminum alloy. , 13, and thus has an excellent appearance with a sense of unity throughout. Moreover, since the whole pipe joint 10 will be comprised with a metal when the internal cylinder 11 is formed with a metal, it has the outstanding fire resistance.

As described above, the inner cylinder 11 can be formed by injection molding of a plastic material. In this case, the manufacturing cost can be reduced as compared with the case where the inner cylinder 11 is formed by aluminum die casting.

Next, Example 2 will be described. In the second embodiment, as shown in FIG. 4, a flange 190 formed of metal is attached to the bent portion 180 of the inner cylinder 110 instead of providing a flange rising from the bent portion of the inner cylinder. . Since the basic configuration of the second embodiment is the same as that of the first embodiment, the same reference numerals as those in the first embodiment are assigned to the same functional parts, and detailed description thereof is omitted.

As shown in FIG. 5, the pipe joint 100 includes an inner cylinder 110, and an outer cylinder 12 and an outer cylinder 13 that are respectively inserted into the inner cylinder. The inner cylindrical body 110 has a first cylindrical portion 1
A groove 20 that goes around the outer wall surface 180 a of the bent portion is provided in the bent portion 180 that is a joint surface between the fourth and second cylindrical portions 15. As shown in FIG. 4, the groove 20 has a first cylindrical portion 1 from the communication location.
Along the axial direction of the fourth and second cylinder parts 15, they extend to both outer wall surfaces 14 a and 15 a of the first cylinder part 14 and the second cylinder part 15, respectively. The inner cylinder 110 is integrally formed by injection molding of a plastic material.

The flange 190 is formed of metal, can be fitted into the groove 20, and has an elliptical ring shape that can go around the outer wall surface 180 a of the bent portion 180. The flange 190 has a bent portion 18.
It can be divided into a flange portion 190a and a flange portion 190b along a plane perpendicular to the short axis so that it can be attached to the zero outer wall surface 180a. As shown in FIG. 5, which is a longitudinal sectional view of the pipe joint 100, the flange 190 includes a base portion 21 that can be fitted into the groove 20, and both the cylindrical portions 14.
, And a ridge 22 rising from the base 21 along a plane that makes an inclination of 45 degrees with respect to both of the 15 axes, and extends in parallel to the base 21 from the tip of the ridge, and has the same shape as the base. And an umbrella part 23 to be presented.

  Next, a method for manufacturing the pipe joint 100 will be described.

An L-shaped inner cylinder 110 is formed as a whole by injection molding of a plastic material. The inner cylinder 110 has a first cylinder part 14 having a first pipe connection part 16 formed at one end, a second pipe connection part 17 formed at one end, and a first axis so that their axes are orthogonal to each other. The outer wall surface 180a of the bent portion 180 defined by the second cylindrical portion 15 communicating with the cylindrical portion 14 and the joint surface between the cylindrical portions 14 and 15.
And a groove 20 provided on the surface.

The flange 190 is divided into a flange portion 190a and a flange portion 190b, and both the flange portions 190a and 190b are sandwiched between the flange portions 190a and 190b so that the bent portion 180 of the inner cylinder 110 is sandwiched from both sides (see arrow A2). The base portions 21 of both flange portions 190a and 190b are fitted into the groove 20 so as to be fitted to the grooves 20, respectively, and both flange portions 190a and 190b are attached to the bent portion 180 and fixed.

  The outer cylinder member is divided to form the outer cylinder 12 and the outer cylinder 13.

As shown in FIG. 5, both end surfaces 12 b that define the other ends of both outer cylinders 12, 13, respectively.
The first cylinder portion 1 of the inner cylinder 110 is formed so that 13b face each other through the flange 190.
4 and the outer cylinder 12 is inserted into the second cylinder portion 15 of the inner cylinder 110 (see arrow A3). At this time, the end surface 12b that defines the other end of the outer cylindrical body 12 and the one side surface 22a of the protruding portion 22 of the flange 190 are brought into surface contact, and the end surface 13b that defines the other end of the outer cylindrical body 13 and the flange 190 Both external cylinders 12 and 13 are inserted between the base portion 21 and the umbrella portion 23 of the flange 190 so as to bring the other side surface 22 b of the ridge portion 22 into surface contact. In this way, both the external cylinders 12 and 13 are connected to the internal cylinders in a state where both end faces 12b and 13b of the external cylinders 12 and 13 are in surface contact with both side surfaces 22a and 22b of the projecting portion 22 of the flange 190, respectively. 11
It sticks to zero. Thereby, the pipe joint 100 in which the both outer cylinders 12 and 13 are inserted into the inner cylinder 110 can be manufactured.

According to the pipe joint 100 of the second embodiment, the bent portion 180 of the pipe joint is configured by the flange 190 formed of metal and the external cylinders 12 and 13 that are in contact with the flange. It has an excellent appearance with a sense of unity. In addition, the pipe joint 100 has excellent fire resistance because all the portions exposed to the outside are made of metal in a state where the pipes are connected to both pipe connecting portions 16 and 17 at both ends thereof. Furthermore, since the internal cylinder 110 is formed by injection molding of a plastic material, the manufacturing cost can be reduced compared to the case where the internal cylinder is formed of metal.

In the pipe joint 100 of the second embodiment, the umbrella portion 23 of the flange 190 is removed, and the flange 1
When the height of the ridge portion 22 is adjusted so that the tip of the 90 ridge portion 22 forms a plane together with the outer wall surfaces 12c and 13c of the external cylinders 12 and 13, the shape is substantially the same as that of the first embodiment. The pipe joint 100 can be obtained.

Therefore, according to the pipe joint 100 which concerns on Example 2, compared with the conventional pipe joint similarly to Example 1, it has the outstanding external appearance, without causing the rise in manufacturing cost.

According to the method for manufacturing the pipe joint 100 according to the second embodiment, similarly to the first embodiment, the pipe joint 100 having the above-described features can be manufactured without causing an increase in manufacturing cost.

In addition, according to the manufacturing method described above, the dividing surfaces having the same inclination with respect to the axial direction (
Both external cylinders 12 and 13 having 12b) and (13b) and having a uniform external appearance can be easily formed.

According to the manufacturing method described above, since the pipe joint 100 obtains a certain water stoppage by the integrally formed internal cylinder 11, it is possible to easily manufacture the pipe joint 100 having a certain water stoppage. it can.

In both of the above-described embodiments, the first cylinder portion 14 and the second cylinder portion 15 of the inner cylinder are orthogonal to each other, but the angle at which the axes intersect is limited to 90 degrees. is not. In this case, for example, the angle formed by the dividing surface that divides the outer cylinder member with respect to the plane perpendicular to the axis of the outer cylinder member is half the angle at which the axes of the cylinder portions 14 and 15 intersect each other. By setting this angle, it is possible to form both outer cylinders 12 and 13 that fit the inner cylinder 11 regardless of the angle at which the axes of the cylinder parts 14 and 15 intersect.

In both of the above-described embodiments, only the outer cylinders 12 and 13 are formed from the outer cylinder member. However, two outer cylinders formed from the same outer cylinder member are inserted into the inner cylinder and the tube is inserted. A joint may be manufactured, and a plurality of outer cylinders may be formed from the outer cylinder member. In this case, any external cylinder may be inserted into the internal cylinder 11 as long as they are compatible with each other. However, when the outer cylinder member is divided, the two outer cylinders that are adjacent to each other via the dividing surface can be inserted into the inner cylinder 11 so that a more integrated appearance can be obtained. It is desirable to form a pipe joint using two external cylinders that are adjacent to each other.

It is a perspective view which shows Example 1 of the pipe joint 10 which concerns on this invention. It is sectional drawing which shows the longitudinal cross-section in FIG. It is a perspective view which shows the manufacture process of the pipe joint 10 which concerns on this invention. It is a perspective view which shows the pipe joint 100 which concerns on this invention of Example 2. FIG. It is sectional drawing which shows the longitudinal cross-section in FIG.

Explanation of symbols

10, 100 Pipe joint 11, 110 Inner cylinder 12, 13 Outer cylinder 12b, 13b End face 16, 17 (as a split surface) Pipe connection 18, 180 Bend 18a, 180a Outer wall 19, 190 Flange

Claims (2)

A pipe joint having pipe connection portions at both ends and bending at an intermediate position between the pipe connection portions,
The tube connecting portion is formed at both end portions, presents a cylindrical shape bent at an intermediate position between the two tube connecting portions, and an inner cylinder having a flange that goes around the outer wall surface of the bent portion;
An outer cylinder member having a cylindrical shape having an inner diameter and a uniform outer diameter that allows the inner cylinder to be inserted and formed of metal is divided by a surface that is inclined with respect to the axial direction of the outer cylinder member. Two outer cylinders having split surfaces that are equally inclined with respect to the axial direction of the outer cylinder member,
The two outer cylinders are arranged so that the split surfaces of the two outer cylinders are opposed to the flanges so that the split surfaces of the two outer cylinders are opposed to each other via the flange. A pipe joint characterized in that it is externally attached to and fixed to the inner cylindrical body in a state of being in contact with the pipe. A manufacturing method for manufacturing a pipe joint having pipe connecting portions at both ends and bending at an intermediate position between the two pipe connecting portions,
A pipe connecting portion is formed at both ends, an inner cylinder having a cylindrical shape bent at an intermediate position between the two pipe connecting portions is formed, and a flange that goes around the outer wall surface of the bent portion is formed at the bent portion of the inner cylinder. Providing,
An outer cylinder member that has a cylindrical shape with an inner diameter and a uniform outer diameter that allow the inner cylinder to be inserted and is formed of metal is divided by a surface that is inclined with respect to the axial direction of the outer cylinder member. Thereby forming two external cylinders having equally inclined split surfaces with respect to the axial direction of the outer cylinder member,
The two outer cylinders are externally attached from both ends of the inner cylinder so that the two split surfaces of the two outer cylinders face each other through the flange and the functions of the pipe connecting portions are not impaired. A method for manufacturing a pipe joint, comprising: inserting and fixing the outer cylinders to the inner cylinder in a state where the two split surfaces are in contact with the flanges.

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