JP2021046718A - Leg part joint - Google Patents

Abstract

To provide a leg part joint suppressing splash of drain when the drain collides therewith.SOLUTION: A leg part joint 1 has a first connection part 10, a second connection part 15 having a second central axis O2 crossing a first central axis O1 of the first connection part, and a bent part 20 connected to the first connection part and the second connection part. In a cross sectional view of the leg part joint by a reference face S1 including the first central axis and the second central axis, a first inner peripheral face 20a of the bent part of a convex side D1 with the convex bent part has a first connection line 21a continued to an inner peripheral face of the first connection part, and a second connection line 22a continued to the inner peripheral face of the second connection part and along the second central axis. The first connection line and the second connection line are connected with each other forming an obtuse angle θ1.SELECTED DRAWING: Figure 2

Description

The present invention relates to leg joints.

Conventionally, a leg joint including an upper pipe connecting portion (first connecting portion), a horizontal main pipe connecting portion (second connecting portion), and a bend portion (bent portion) is known (for example, Patent Document 1). reference).
The upper pipe connecting portion is connected to a vertical pipe or the like penetrating the floor slab of the lowermost layer. The horizontal main pipe connection portion is connected to the horizontal pipe. The bend portion connects the upper pipe connecting portion and the horizontal main pipe connecting portion. At the bend portion, an arc shape having a central axis of less than 90 degrees is formed. At the connecting portion between the bend portion and the horizontal main pipe connecting portion, the central axis direction of the bend portion and the axial direction of the horizontal main pipe connecting portion are parallel.

Japanese Unexamined Patent Publication No. 2015-86612

However, when drainage is flowed downward from the vertical pipe side to the upper pipe connection portion in the leg joint configured as in Patent Document 1, the inner peripheral surface of the bend portion on the side where the bend portion becomes convex (hereinafter, , The inner peripheral surface on the convex side) is exposed to drainage. At this time, since the central axial direction of the bend portion and the axial direction of the horizontal main pipe connecting portion are parallel to each other, the acute angle among the angles formed by the vertical direction and the convex inner peripheral surface becomes large. Therefore, when the drainage hits the convex inner peripheral surface, the force received from the bend portion becomes relatively large, and when the drainage hits the convex inner peripheral surface, it easily jumps up. In this case, filth or the like in the drainage adheres to the inner peripheral surface of the bend portion, which makes it difficult for the drainage or air to flow in the leg joint.

The present invention has been made in view of such a problem, and an object of the present invention is to provide a leg joint that suppresses jumping up when hit by drainage.

In order to solve the above problems, the present invention proposes the following means.
The leg joint of the present invention includes a first connecting portion, a second connecting portion having a second central axis intersecting the first central axis of the first connecting portion, the first connecting portion, and the second connecting portion. A leg joint including a bent portion connected to each of the above, and the bent portion is convex in a cross-sectional view of the leg joint by a reference plane including the first central axis and the second central axis. The first inner peripheral surface of the bent portion on the convex side is connected to the inner peripheral surface of the second connecting portion and the first connecting line connected to the inner peripheral surface of the first connecting portion, and is along the second central axis. It has a second connecting line, and is characterized in that the first connecting line and the second connecting line are connected at an blunt angle.

According to the present invention, for example, a leg joint is used by connecting a vertical pipe to a first connecting portion and connecting a horizontal pipe to a second connecting portion. On the first inner peripheral surface where the drainage flowing from the vertical pipe side to the bent portion hits, the first connecting line and the second connecting line are connected at an acute angle, so that the inside of the convex side of the bend portion of Patent Document 1 The sharp angle between the vertical direction and the first connecting line is smaller than that of the peripheral surface (the first connecting line is arranged along the vertical direction). Therefore, when the drainage flowing downward hits the first connecting line of the bent portion, the force received from the bent portion becomes relatively small, and it is possible to suppress the drainage from jumping up when hitting the bent portion.

Further, in the leg joint, the end portion of the first connecting line on the first connecting portion side may extend along the first central axis.
According to the present invention, the angle formed by the end of the first connecting line on the first connecting portion side and the vertical direction is smaller than the angle formed by the end of the first connecting line on the second connecting portion side and the vertical direction. Become. Then, when the drainage flowing downward hits the end of the first connecting line on the first connecting portion side, the force received from the bent portion becomes smaller. Therefore, it is possible to further suppress the jumping up when the drainage hits the bent portion.

Further, in the leg joint, on the second inner peripheral surface of the bent portion opposite to the convex side, the end portion on the first connecting portion side may extend along the first central axis. ..
According to the present invention, for example, when a leg joint is formed by injection molding using a mold, the direction in which the leg joint is removed from the core forming the first connection portion in the mold is the direction of the second inner peripheral surface. Along the end on the first connection side. Therefore, the end portion of the second inner peripheral surface on the first connecting portion side can be formed by using the core forming the first connecting portion.

Further, in the leg joint, the outer peripheral surface of the bent portion on the convex side straddles a position corresponding to the convex side of the first connecting line and a position corresponding to the convex side of the second connecting line. It may be provided with an arranged protrusion.
According to the present invention, the position corresponding to the convex side of the connecting line and the position corresponding to the convex side of the line segment are susceptible to the force of drainage flowing downward. By arranging the protrusions on the outer peripheral surface of the curved portion on the convex side straddling these positions, the positions of the leg joints that are susceptible to the force of drainage can be reinforced by the protrusions.

Further, in the leg joint, when the second connection portion is a receiving port and the side opposite to the convex side is the concave side, the second connection portion is viewed as a cross-sectional view of the leg joint by the reference surface. The end portion of the two connecting lines on the second connecting portion side is arranged on the concave side of the convex inner peripheral surface of the second connecting portion, and the concave second inner peripheral surface of the bent portion. The distance between the end portion on the second connecting portion side and the second central axis of the inner peripheral surface on the concave side in the second connecting portion may be equal to each other.
According to the present invention, the horizontal pipe is formed on the second central axis by the step portion formed between the end portion on the second inner peripheral surface on the second connecting portion side and the convex inner peripheral surface on the second connecting portion. Can be locked in the direction along. Further, the space extending from the concave portion at the end of the horizontal pipe on the curved portion side to the curved portion side can be used as a ventilation portion for flowing air into the curved portion, so that drainage can be easily flowed into the curved portion.

Further, in the leg joint, the bent portion may have a tubular body in which the inner peripheral surface on the convex side is the second connecting line in a cross-sectional view of the leg joint by the reference surface.
According to the present invention, for example, when a leg joint is formed by injection molding using a mold, the direction in which the leg joint is removed from the core forming the second connection portion in the mold is the second connection of the tubular body. Along the line. Therefore, the core that forms the second connecting portion can be used to form the second connecting line of the tubular body.

According to the leg joint of the present invention, it is possible to suppress the jumping up when the drainage hits.

It is a front view of the leg joint of one Embodiment of this invention. It is sectional drawing of the leg joint in the plane formed by the 1st central shaft and the 2nd central shaft. It is an enlarged view of the main part in FIG. It is a vertical cross-sectional view of the adapter body of the same leg joint. It is a top view of the adapter body. It is a perspective view of the adapter body. It is a vertical cross-sectional view by the reference plane of the leg joint in the modification of one Embodiment of this invention. It is a vertical cross-sectional view by the reference plane of the leg joint in the modification of one Embodiment of this invention. It is a vertical cross-sectional view by the reference plane by the cross section orthogonal to the reference plane of the leg joint in the modification of one Embodiment of this invention. It is a vertical cross-sectional view by the reference plane of the leg joint. It is a front view of the leg joint in the modification of one Embodiment of this invention. It is sectional drawing of the cutting line A2-A2 in FIG.

Hereinafter, an embodiment of the leg joint according to the present invention will be described with reference to FIGS. 1 to 12.
As shown in FIGS. 1 and 2, the leg joint 1 of the present embodiment includes a first socket (first connection portion) 10, a second socket (second connection portion) 15, and a bend portion 20. , Is equipped. In addition, in FIG. 1 or less, the vertical pipe 100 and the horizontal pipe 101 are shown by a two-dot chain line. In the following, the arrangement of the leg joint 1 when the first socket 10 of the leg joint 1 is connected to the vertical pipe 100 and the second socket 15 is connected to the horizontal pipe 101 will be described as an example. The arrangement of the part joint 1 is not limited to this.

The first socket 10 is formed in a cylindrical shape. The first receiving port 10 is arranged so that the first central axis O1 of the first receiving port 10 is along the vertical direction. When the first central axis O1 referred to here is along the vertical direction, for example, the acute angle of the angle formed by the first central axis O1 and the vertical direction is 5 degrees or less, or the angle formed by the first central axis O1 and the vertical direction is up and down. It means that the direction is parallel. The same applies to the case where the second connecting line 22a, which will be described later, is along the second central axis O2.
The inner diameter of the first socket 10 is larger than the outer diameter of the vertical pipe 100. The vertical pipe 100 is arranged along the vertical direction. The lower end of the vertical pipe 100 is arranged in the first receiving port 10.
The second receiving port 15 is formed in a cylindrical shape. The second receiving port 15 is arranged so that the second central axis O2 of the second receiving port 15 is along the horizontal plane. The second receiving port 15 may be arranged so as to be inclined with respect to the horizontal plane so that the horizontal pipe 101 has a water gradient.
The second central axis O2 intersects the first central axis O1. Here, the plane including the first central axis O1 and the second central axis O2 (formed by the first central axis O1 and the second central axis O2) is defined as the reference plane S1. FIG. 2 shows a cross-sectional view of the leg joint 1 with respect to the reference surface S1.

The inner diameter of the second receiving port 15 and the outer diameter of the horizontal pipe 101 are equal to each other. The horizontal pipe 101 is arranged along the horizontal plane. The end portion of the horizontal pipe 101 is arranged in the second receiving port 15.
It is preferable that a sealing member is arranged between the first receiving port 10 and the vertical pipe 100, and that drainage is regulated from leaking to the outside from between the first receiving port 10 and the vertical pipe 100. The same applies to the space between the second receiving port 15 and the horizontal pipe 101.

The bent portion 20 is connected to the first receiving port 10 and the second connecting portion 15, respectively. The bent portion 20 is curved so as to be convex diagonally downward. In the following, the direction in which the bent portion 20 is convex is referred to as the convex side D1. The direction opposite to the convex side D1 is called the concave side D2.
The bent portion 20 includes a bent body 21, a tubular body 22, and a leg body 23.

In the present embodiment, the curved body 21 is a curved tubular body that changes the direction of the drainage flow by about 90 degrees. In the cross-sectional view of the leg joint 1 by the reference surface S1, the inner peripheral surface of the convex side D1 of the bent body 21 is the first connecting line 21a curved so as to be convex toward the convex side D1. In the cross section in the plane formed by the first central axis O1 and the second central axis O2 shown in FIG. 2, the central angle θ0 of the arc formed by the first connecting line 21a is set to be less than 90 degrees. The central angle θ0 is preferably 35 degrees or more and 85 degrees or less.
The first end portion 21a1 (end portion on the first receiving port 10 side) of the first connecting line 21a is connected to the inner peripheral surface of the first receiving port 10. It is preferable that the first end portion 21a1 of the first connecting line 21a extends along the first central axis O1 of the first receiving port 10. Further, the first end portion 21a1 has a perfect circular opening, and its central axis is parallel to the first central axis O1.

The second end 21a2 (tangent L1 at the end of the second end 21a2 of the first connection line 21a), which is the end opposite to the first end 21a1 of the first connection line 21a, is inclined with respect to the horizontal plane. ing. The first connecting line 21a continuously changes its direction from the direction along the first central axis O1 to the direction intersecting the horizontal plane from the first end portion 21a1 to the second end portion 21a2. The tangent line L1 is gradually inclined downward toward the second socket 15.

The inner peripheral surface 21b of the concave side D2 of the bent body 21 has a curved shape curved so as to be convex toward the convex side D1.
The inner diameter of the portion of the bent body 21 corresponding to the first end portion 21a1 of the first connecting wire 21a is smaller than the inner diameter of the first receiving port 10. The bent body 21 is coaxially connected to the first receiving port 10. The bent body 21 and the first receiving port 10 are connected to each other via the first step portion 11.

The tubular body 22 is formed in a straight tubular shape and is arranged along a horizontal plane.
In the cross-sectional view of the leg joint 1 by the reference surface S1, the inner peripheral surface of the convex side D1 of the tubular body 22 is a linear (flat) second connecting line 22a. The second connecting line 22a is along the second central axis O2 of the second receiving port 15. The second connecting line 22a and the first connecting line 21a of the bent body 21 form a first inner peripheral surface 20a of the bent portion 20. The second connecting line 22a is connected to the inner peripheral surfaces of the second end portion 21a2 and the second receiving port 15 of the first connecting line 21a, respectively. The first connecting line 21a (tangent line L1) and the second connecting line 22a are connected to the concave side D2 at an obtuse angle θ1 (hereinafter, also referred to as an obtuse angle θ1). The obtuse angle is an angle of less than 180 degrees.
In the cross-sectional view of the leg joint 1 by the reference surface S1, the connecting portion between the first connecting line 21a and the second connecting line 22a is below the end on the inner peripheral surface 21b of the bent body 21 on the first receiving port 10 side. positioned.

The inner peripheral surface 22b of the concave side D2 of the tubular body 22 is linear. The inner peripheral surface 22b and the inner peripheral surface 21b of the bent body 21 form a second inner peripheral surface 20b on the concave side D2 of the bent portion 20.
The inner diameter of the tubular body 22 is smaller than the inner diameter of the second socket 15. The tubular body 22 is coaxially connected to the second receiving port 15. The step portion 16 formed on the inner peripheral surface of the connecting portion between the tubular body 22 and the second receiving port 15 is formed over the entire circumference of the second receiving port 15. The horizontal pipe 101 is locked to the step portion 16 over the entire circumference.
The leg 23 is formed in a cylindrical shape in this example. The leg 23 is arranged so that the axis of the leg 23 is along the first central axis O1 of the first socket 10. The upper end of the leg 23 is fixed to the outer peripheral surface of the convex side D1 of the bent body 21. The lower end of the leg 23 and the lower end of the second receiving port 15 are arranged at the same positions in the vertical direction.

The first receiving port 10, the second receiving port 15, and the bent portion 20 constituting the leg joint 1 are integrally formed by, for example, injection molding using a resin material.

In the present embodiment, the first receiving port 10 of the leg joint 1 and the vertical pipe 100 are connected by an adapter 50. The adapter 50 is formed in an annular shape and is arranged coaxially with the first receiving port 10 between the first receiving port 10 and the vertical pipe 100. The adapter 50 adjusts the diameter difference between the first receiving port 10 and the vertical pipe 100.
In the following, the radial direction of the adapter 50 is simply referred to as the radial direction, and the circumferential direction of the adapter 50 is simply referred to as the circumferential direction.

As shown in FIG. 2, the adapter 50 includes an adapter main body 51, an elastic ring 52, and a regulating member 53.
As shown in FIGS. 3 to 6, the adapter main body 51 includes a main body portion 55 and a rectifying portion 56. As shown in FIG. 3, the main body portion 55 is arranged in the first receiving port 10 and is supported from below the main body portion 55 by the first step portion 11. A vertical pipe 100 is arranged in the main body 55. As shown in FIG. 3, the main body portion 55 includes a ring portion 57 and a first cylinder portion 58.

The members of the adapter 50 other than the elastic ring 52 may be formed of a vinyl chloride resin, for example, a resin such as vinyl chloride, and in particular, a resin having excellent impact resistance is used. Is preferable.
As the vinyl chloride resin, for example, the resin having excellent impact resistance is obtained by grafting (1) a resin obtained by mixing a polyvinyl chloride polymer with an impact improving resin, and (2) a polyvinyl chloride polymer and an impact improving resin. Copolymerized resin, (3) a copolymer of a vinyl chloride monomer and a monomer having an unsaturated bond copolymerizable with this vinyl chloride monomer, (4) vinyl chloride as a (co) polymer other than vinyl chloride Examples thereof include a graft copolymer obtained by graft copolymerization. These (1) to (4) may be used alone or in combination of two or more. Further, the polyvinyl chloride resin may be chlorinated if necessary.

Examples of the impact-improving resin mixed with the polyvinyl chloride polymer in (1) above and the impact-improving resin graft-copolymerized with the polyvinyl chloride polymer in (2) above include resins having rubber properties. Be done. Specific examples thereof include acrylonitrile-butadiene-styrene copolymer, methylmethacrylate-butadiene-styrene copolymer, acrylic rubber, chlorinated polyethylene, ethylene-vinyl acetate copolymer resin, acrylonitrile-butadiene copolymer and the like. .. These may be used alone or in combination of two or more.

The impact resistance of the polyvinyl chloride resin can be improved by using the polyvinyl chloride resin obtained by mixing or graft-copolymerizing the resin having the above rubber properties.
The adapter 50 has a complicated structure and is easily damaged. However, by using a resin having excellent impact resistance for the adapter 50, it is possible to prevent the adapter 50 from being damaged, for example, when the leg joint 1 and the adapter 50 are accidentally dropped.

The ring portion 57 is fitted (tightly fitted) in the first receiving port 10. As shown in FIG. 2, the axis of the opening 57a inside the ring portion 57 is on the convex side D1 in the direction orthogonal to the first central axis O1 with respect to the first central axis O1 of the first socket 10. It is staggered. The opening 57a is eccentric with respect to the first socket 10. As shown in FIG. 3, the ring portion 57 includes a thick-walled portion 59 and a thin-walled portion 60.
The thick portion 59 is an outer peripheral portion of the ring portion 57, and the thin wall portion 60 is an inner peripheral portion of the ring portion 57. The thick portion 59 and the thin portion 60 are continuously arranged in the radial direction. The wall thickness of the thin portion 60 (thickness along the axial direction of the adapter 50) is thinner than the wall thickness of the thick portion 59.
The upper surface of the thin portion 60 is connected to the upper surface of the thick portion 59 via a step. The lower surface of the thin portion 60 is smoothly connected to the lower surface of the thick portion 59 without any step.

As shown in FIG. 3, the first cylinder portion 58 extends upward from the ring portion 57. The first tubular portion 58 is arranged on the inner peripheral edge of the thick portion 59. The first tubular portion 58 is arranged coaxially with the opening 57a of the ring portion 57. A ridge 61 is provided on the outer peripheral surface of the first tubular portion 58. The ridge 61 is provided at the upper end of the first tubular portion 58. The ridges 61 are continuously provided over the entire circumference in the circumferential direction.

As shown in FIG. 2, the rectifying unit 56 projects from the main body 55 and is arranged in the bent body 21. The rectifying unit 56 projects downward from the thin-walled unit 60 and is arranged in the bent body 21.
As shown in FIGS. 4 to 6, the rectifying unit 56 includes a plate portion 62 and a protrusion 63. The plate portion 62 extends in the circumferential direction. The upper end of the plate 62 is connected to the lower surface of the ring 57. The plate portion 62 is arranged in the portion of the ring portion 57 in the direction orthogonal to the first central axis O1 and in the direction of the concave side D2.

The protrusion 63 protrudes inward in the radial direction from the plate 62. As shown in FIG. 5, a plurality of protrusions 63 are arranged at intervals in the circumferential direction. In the illustrated example, the protrusions 63 are arranged at both ends of the plate portion 62 in the circumferential direction. As shown in FIG. 4, the amount of protrusion toward the inside of the protrusion 63 in the radial direction increases from the upper side to the lower side and then decreases. The portion of the protrusion 63 having the largest amount of protrusion inward in the radial direction is located above the center of the protrusion 63 in the vertical direction. The amount of protrusion of the protrusion 63 is preferably 15 mm or less. The protrusion 63 has a curved shape that is convex inward in the radial direction when viewed from the side in the circumferential direction.
Further, the protrusion 63 has a rhombus shape in which the vertical direction and the horizontal direction are diagonal when viewed from the inside in the radial direction.

As shown in FIG. 3, the elastic ring 52 is formed of an elastic body such as rubber. The elastic ring 52 is arranged in the main body 55. A vertical pipe 100 is fitted in the elastic ring 52. The elastic ring 52 includes a main body ring 64, a first convex portion 65, and a second convex portion 66.
The main body ring 64 is tightly fitted in the first cylinder portion 58. The inner diameter of the main body ring 64 is larger than the inner diameter of the ring portion 57 (diameter of the opening 57a).

The first convex portion 65 and the second convex portion 66 are provided on the inner peripheral surface of the main body ring 64. The first convex portion 65 and the second convex portion 66 are continuously provided over the entire circumference in the circumferential direction.
The first convex portion 65 is provided at the lower end portion of the main body ring 64. The inner diameter of the first convex portion 65 is equivalent to the inner diameter of the ring portion 57. The first convex portion 65 is supported by the ring portion 57 from below the first convex portion 65. The lower end surface of the vertical pipe 100 is abutted against the upper surface of the first convex portion 65.

The second convex portion 66 is provided at the upper end portion of the main body ring 64. The second convex portion 66 extends downward as it goes inward in the radial direction. The inner diameter of the second convex portion 66 is smaller than the outer diameter of the vertical pipe 100. The vertical tube 100 inserted into the elastic ring 52 elastically deforms the second convex portion 66 downward and outward in the radial direction.
As a result, the second convex portion 66 comes into close contact (pressure contact) with the vertical pipe 100 over the entire circumference, and the sealing property between the elastic ring 52 and the vertical pipe 100 is ensured.

The regulating member 53 is attached to the main body portion 55 and restricts the elastic ring 52 from being separated from the main body portion 55. The regulating member 53 is arranged in the first receiving port 10 of the leg joint 1. The regulating member 53 includes a second cylinder portion 67 and a flange portion 68.
The second tubular portion 67 is fitted (tightly fitted) to the first tubular portion 58 from the inside in the radial direction. In the present embodiment, the second tubular portion 67 is arranged between the first tubular portion 58 and the first receiving port 10. The second tubular portion 67 is fitted (tightly fitted) in the first receiving port 10. The lower end surface of the second tubular portion 67 is separated upward from the upper surface of the thick portion 59.

The flange portion 68 projects inward in the radial direction from the upper end portion of the second tubular portion 67. The flange portion 68 covers the first cylinder portion 58 and the main body ring 64 from above. The lower surface of the flange portion 68 is in contact with the upper end surfaces of the first cylinder portion 58 and the main body ring 64, respectively.
The adapter 50 (particularly, the adapter body 51 and the regulating member 53) may be transparent from the viewpoint of visibility.

The leg joint 1 of the present embodiment is used by flowing drainage W downward from the vertical pipe 100 side to the leg joint 1.
On the first inner peripheral surface 20a where the drainage W flowing from the vertical pipe 100 side to the bent portion 20 hits, the first connecting line 21a and the second connecting line 22a are connected at an obtuse angle θ1. The angle θ2, which is an acute angle among the angles formed by the vertical direction and the first connecting line 21a, is smaller than that of the convex inner peripheral surface of the bend portion of the above (so that the first connecting line 21a is along the vertical direction). Will be placed). Therefore, when the drainage W flowing downward hits the first connecting line 21a of the bent body 21, the force received from the bent portion 20 becomes relatively small, and the jumping up when the drainage W hits the bent portion 20 is suppressed. Can be done.
Further, the length of the leg joint 1 in the vertical direction becomes relatively short, and the fit of the leg joint 1 can be improved.

The first end portion 21a1 of the first connecting line 21a extends along the first central axis O1 of the first receiving port 10. As a result, the angle formed by the first end portion 21a1 of the first connecting line 21a and the vertical direction becomes smaller than the angle formed by the second end portion 21a2 of the first connecting line 21a and the vertical direction. Then, when the drainage W flowing downward hits the first end portion 21a1 of the first connecting line 21a, the force received from the bent portion 20 becomes smaller. Therefore, it is possible to further suppress the jumping up when the drainage W hits the bent portion 20.
The bent portion 20 includes a tubular body 22. As a result, when the leg joint 1 is formed by injection molding using a mold, the direction in which the leg joint 1 is removed from the core forming the second socket 15 in the mold is the second connection of the tubular body 22. Along line 22a. Therefore, the second connecting line 22a of the tubular body 22 can be formed by using the core forming the second receiving port 15. Since the lower surface of the tubular body 22 is a flat second connecting line 22a, the volume of the space in the leg joint 1, that is, the air passage when the drainage W flows through the leg joint 1 is secured. Can be done.

The structure of the leg joint 1 of the present embodiment can be variously modified as described below.
Like the leg joint 1A shown in FIG. 7, the inner peripheral surface 21bA of the bent body 21 (the end of the second inner peripheral surface 20bA on the first receiving port 10 side) extends along the first central axis O1. May be good.
With this configuration, when the leg joint 1A is formed by injection molding using a mold, the direction in which the leg joint 1A is removed from the core forming the first socket 10 in the mold is a bent body. Along the inner peripheral surface 21bA of 21. Therefore, the inner peripheral surface 21bA of the bent body 21 can be formed by using the core forming the first receiving port 10.

Like the leg joint 1B shown in FIG. 8, the first connecting line 21aA of the bent body 21 may be composed of a plurality of connecting line segments 26a, 26b, 26c.
The connecting line segment 26a and the connecting line segment 26b are connected to the concave side D2 at an obtuse angle. Similarly, the connecting line segment 26b and the connecting line segment 26c, and the connecting line segment 26c and the second connecting line 22a are each connected to the concave side D2 at an obtuse angle. That is, the connecting line segments 26a, 26b, and 26c are formed in a polygonal line shape. The first connecting line 21aA is intermittently turned from the direction along the first central axis O1 to the direction intersecting the horizontal plane from the first receiving port 10 side to the second receiving port 15 side.
The end of the connecting line segment 26a opposite to the end connected to the connecting line segment 26b is connected to the inner peripheral surface of the first receiving port 10.

Of the angles formed by the connecting line segment 26b and the second central axis O2, the acute angle θ4 is preferably 40 degrees or 80 degrees.
Even if it is configured like the leg joint 1B, the same effect as that of the leg joint 1 of the present embodiment can be obtained.
The number of connecting line segments constituting the first connecting line is not limited to three, and may be one, two, or four or more. The first connecting line may be composed of one or more connecting line segments and one or more curves.

As in the leg joint 1C shown in FIGS. 9 and 10, a protrusion 30 may be provided instead of the leg body 23 of the leg joint 1 of the present embodiment. The protrusion 30 is formed on the outer peripheral surface of the convex side D1 of the bent portion 20. The protrusion 30 is arranged so as to straddle the position P1 corresponding to the convex side D1 of the first connecting line 21a and the position P2 corresponding to the convex side D1 of the second connecting line 22a in the bent portion 20. The protrusion 30 is formed in a part of the bent portion 20 in the circumferential direction of the bent portion 20. The protrusion 30 projects from the outer peripheral surface of the bent portion 20 toward the convex side D1.
In the leg joint 1C of this modified example, the positions P1 and P2 at the bent portion 20 are susceptible to the force of the drainage W flowing downward.
By providing the protruding portion 30 in the leg joint 1C, the outer peripheral surface of the bent portion 20 on the convex side D1 straddling the positions P1 and P2 in the bent portion 20 can be reinforced by the protruding portion 30.

When the leg joint 1C is formed by injection molding, when a gate mark 31 (indicated by a two-dot chain line in FIG. 10) is formed on the protrusion 30, the position of the bend 20 opposite to the gate mark 31. Welds are formed on P3. At the position P3 where the gate mark 31 and the weld are formed in the bent portion 20, the strength of the bent portion 20 may decrease. By forming the gate mark 31 on the protrusion 30, the portion of the bent portion 20 on which the gate mark 31 is formed can be reinforced by the protrusion 30. Further, since it is difficult for the drainage W to hit the position P3 at the bent portion 20, it is possible to prevent the position P3 from being damaged by the drainage W.

As in the leg joint 1D shown in FIGS. 11 and 12, a tubular body 36 may be provided instead of the tubular body 22 of the leg joint 1 of the present embodiment. The bent portion 35 is composed of the tubular body 36 and the bent body 21.
In the cross-sectional view of the leg joint 1D by the reference surface S1, the end portion of the tubular body 36 on the second receiving line 36a on the second receiving port 15 side is concave from the inner peripheral surface of the convex side D1 on the second receiving port 15. It is arranged on the side D2. The end of the concave side D2 of the bent portion 35 on the second inner peripheral surface 35b on the second receiving port 15 side, and the second central axis of the second receiving port 15 on the inner peripheral surface of the concave side D2 of the second receiving port 15. The distance to O2 is equal to each other. The step portion 16 formed on the inner peripheral surface of the connecting portion between the tubular body 36 and the second receiving port 15 is not formed on the concave side D2 side portion of the second receiving port 15, but is formed in the second receiving port 15. It is formed on the convex side D1 side. Therefore, the second central axis O2 and the central axis of the horizontal pipe 101 are in a state of being displaced from each other in the vertical direction (the pipe axis direction of the vertical pipe 100).

The horizontal pipe 101 is locked to the step portion 16 on the convex side D1. The internal space of the bent portion 35 extending from the portion of the concave side D2 at the end of the horizontal pipe 101 on the bent portion 35 side to the bent portion 35 side along the second central axis O2 allows air to flow into the bent portion 35. It becomes part V.
In the leg joint 1D, the horizontal pipe 101 can be locked in the direction along the second central axis O2 by the step portion 16. Further, since the ventilation portion V is formed in the leg joint 1D, air can flow through the ventilation portion V when the drainage W flows in the bent portion 35, so that the drainage W flows in the bent portion 35. It can be made easier.

Although one embodiment of the present invention has been described in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and the configuration is changed, combined, or deleted without departing from the gist of the present invention. Etc. are also included.
For example, in the leg joint of the above-described embodiment, the first connecting portion is the first receiving port 10, which is a receiving port, but the first connecting portion is not limited to the first receiving port 10. For example, the first connection portion may be an insertion slot, a flange, or the like. The same applies to the second connection portion.

1,1A, 1B, 1C Leg joint 10 1st socket (1st connection)
15 2nd socket (2nd connection)
20,35 Bent part 20a 1st inner peripheral surface 20bA, 35b 2nd inner peripheral surface 21a, 21aA 1st connecting line 22,36 Tubular body 22a, 36a 2nd connecting line 30 Protruding part D1 Convex side D2 Concave side O1 1st Central axis O2 Second central axis P1, P2 Position S1 Reference plane θ1 Angle (obtuse angle)

Claims (6)

With the first connection
A second connecting portion having a second central axis intersecting with the first central axis of the first connecting portion,
Bent parts connected to the first connection part and the second connection part, respectively,
It is a leg joint equipped with
In a cross-sectional view of the leg joint by a reference plane including the first central axis and the second central axis.
The first inner peripheral surface of the bent portion on the convex side where the bent portion is convex is
The first connecting line connected to the inner peripheral surface of the first connecting portion and
A second connecting line connected to the inner peripheral surface of the second connecting portion and along the second central axis,
Have,
A leg joint in which the first connecting line and the second connecting line are connected at an obtuse angle. The leg joint according to claim 1, wherein the end portion of the first connecting line on the first connecting portion side extends along the first central axis. The leg portion according to claim 1 or 2, wherein the end portion on the first connecting portion side extends along the first central axis on the second inner peripheral surface of the bent portion opposite to the convex side. Fittings. A claim in which the outer peripheral surface of the bent portion on the convex side is provided with a protrusion arranged so as to straddle a position corresponding to the convex side of the first connecting line and a position corresponding to the convex side of the second connecting line. The leg joint according to any one of items 1 to 3. The second connection portion is a socket and
When the side opposite to the convex side is the concave side,
In the cross-sectional view of the leg joint by the reference plane,
The end of the second connecting line on the side of the second connecting portion is arranged on the concave side of the inner peripheral surface of the convex side of the second connecting portion.
The distance between the end of the bent portion on the second inner peripheral surface on the concave side on the second connecting portion side and the inner peripheral surface on the concave side of the second connecting portion with the second central axis is mutually exclusive. The leg joint according to any one of claims 1 to 4, which is equivalent. The bent portion according to any one of claims 1 to 5, wherein the bent portion has a tubular body in which the inner peripheral surface on the convex side is the second connecting line in a cross-sectional view of the leg joint by the reference surface. Leg joint.

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