JP2016211712A - Joint member with flange and connection structure thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a joint member with a flange having high strength of the flange and excellent in durability, and a connection structure of the joint member with the flange.SOLUTION: Reinforcement parts 11-20 are provided at a corner part between a flange 3 of a joint member 1 and a joint member outer peripheral surface 2f. An insertion part 31 of a branch pipe 30 is inserted into the joint member 1, flanges 3, 32 are overlapped, and a locking band 40 is wound. The diameter of the locking band 40 is reduced, the flanges 3, 32 are inserted into openings 71-79, and V-shaped parts 61-69 are made to enter into recess parts 21-29. A claw piece 42 of the locking band 40 is engaged to an opening 43 to make the locking band 40 into a closed annular shape.SELECTED DRAWING: Figure 10

Description

  The present invention relates to a joint member in which a flange is provided on a joint member body, and particularly to a flanged joint member having high flange strength. The present invention also relates to a connection structure for the flanged joint member.

  As a structure in which tubular members having flanges are connected to each other, the flanges of the tubular members are overlapped, the flanges are held by a connecting member called a clip or a quick fastener, and the tubular members are connected to each other. Used in hot water supply piping systems and the like (Patent Documents 1 and 2).

  Patent Document 1 describes a structure in which a branch pipe protruding from a header and a joint member are connected by a quick fastener as a connecting member. The branch pipe and joint member are each provided with a flange. The end of the joint member is inserted into the branch pipe and the flanges are overlapped with each other. To do.

  In Patent Document 2, the distal end side of the joint member is inserted into a tubular connection portion, the flanges provided on the connection portion and the joint member are overlapped, and the flange is inserted into a flange insertion hole of a clip as a connection member. Hold each other in a butted state.

  FIG. 12 is a perspective view of the quick fastener 90 used in the connection structure of Patent Document 1. The quick fastener 90 is formed in a substantially C ring shape. Four clamping holes 91 into which the flanges superimposed on the clamping holes 91 are inserted are provided, and a hinge portion 92 is formed between the clamping holes 91.

  By the way, in a water supply / hot water supply piping system, for example, when a water hammer (water hammer) that occurs when a faucet is suddenly closed occurs repeatedly, the connection between the flange of the header branch pipe and the flange of the joint member Force acts to allow the joint member to come out of the branch pipe, and this force is transmitted to both flanges via the quick fastener. The force greatly affects the flange on the header side of the synthetic resin, which is insufficient in strength compared to the metal, and the flange portion made of the synthetic resin may be damaged. There was a problem that the connection strength with the member was lowered. The same problem occurs when the main water supply pipe or the main hot water supply pipe is connected via the joint member at the opening end of the header body.

  In particular, it is easy to obtain a joint member such as a vinyl chloride resin. However, when the joint member is made of a resin material having a relatively low strength, the strength of the flange tends to be insufficient.

  Patent Document 1 describes a structure in which a header body or a connecting portion of a branch pipe in such a resin header is reinforced. In Patent Document 1, a reinforcing member made of metal is fitted into an annular groove formed on the back side of the header body or the branch pipe flange so as to reinforce the header body or the branch pipe flange. It is attached to the flange via a reinforcing member. The reinforcing member has an L-shaped cross section, and one side piece engages with the inner bottom surface of the annular groove, and the other side piece engages with the back surface of the header body or the flange of the branch pipe.

Japanese Patent No. 4428625 WO2008 / 139932

  In the structure of the above-mentioned patent document 1, since a reinforcing member is used separately from the quick fastener, it is necessary to carry the reinforcing member in the field in addition to the quick fastener when connecting the joint member, and it takes time to manage parts. Further, it is necessary to attach a reinforcing member to the joint member at the time of connection work, which takes time and labor. In addition, even if the user forgets to attach the reinforcing member, the operation of connecting the joint member can be completed, so that the user may forget to attach the reinforcing member.

  In addition, if the thickness of the flange is increased, the strength of the flange is increased. However, when the thickness of the flange is increased, the hole width in the tube axis direction of the pinching hole 91 of the quick fastener 90 shown in FIG. 12 is increased, and accordingly, the strength and rigidity of the hinge portion 92 is reduced, and the connection of the joint member is reduced. The strength and durability of the part are reduced.

  An object of the present invention is to solve the various problems described above, and to provide a flanged joint member having high flange strength and excellent durability, and a connection structure for the flanged joint member.

  The flanged joint member of the present invention is a flanged joint member having a joint member main body and a flange provided on the distal end side of the joint member main body, and an intersection angle between the outer peripheral surface of the joint member main body and the flange. The reinforcing part is provided integrally with the flange and the joint member main body, and a plurality of the reinforcing parts are provided at intervals in the circumferential direction of the joint member main body. .

  In one aspect of the present invention, 8 to 10 reinforcing portions are provided at intervals in the circumferential direction of the joint member body.

  In one aspect of the present invention, as the reinforcing portion, a substantially triangular column-shaped reinforcing portion whose cross-sectional shape perpendicular to the axis of the joint member body is a triangle, and a substantially trapezoidal column-shaped reinforcing portion whose cross-sectional shape is a trapezoid And are provided.

  In one aspect of the present invention, the substantially triangular columnar reinforcing portions are respectively arranged at approximately four equal positions in the circumferential direction of the joint member main body.

  In one embodiment of the present invention, the joint member is made of a resin such as vinyl chloride resin, polyphenylene sulfide (PPS) resin, or polyphenylsulfone (PPSU).

  The connection structure of the flanged joint member of the present invention is a connection structure of a flanged joint member in which the connected member and the flanged joint member of the present invention are connected, and the connected member is the flanged joint member. And a flange provided at a position subsequent to the insertion portion. The flange of the flanged joint member and the flange of the connected member are overlapped with each other and separated by a locking band. Is blocked.

  In one aspect of the present invention, the locking band includes an arc-shaped portion that surrounds the outer periphery of the flange, a V-shaped portion that enters a recess between the reinforcing portions, and an opening provided in the V-shaped portion. And the overlapped flange is inserted into the opening.

  In the joint member with a flange of the present invention, the reinforcing portion is provided at the intersection corner between the flange and the outer peripheral surface of the joint member body, and the strength and rigidity of the flange are high. The reinforcing portions are arranged at intervals in the circumferential direction, and the opening of the locking band for sandwiching the flange of the joint member and the flange of the connected member has a reinforcing portion between the reinforcing portions. Insert the missing part. For this reason, the width | variety of the opening of a locking band may be small, and the intensity | strength of a locking band will also become high.

  In the present invention, a reinforcing member separate from the joint member is unnecessary, the number of parts is small, and the inventory management cost is low. Further, the forgetting to attach the reinforcing member does not occur, and the reliability of the connecting portion of the joint member is high.

  By setting the number of reinforcing portions to 8 to 12, the flange is sufficiently reinforced.

  Further, by making some of the reinforcing portions have a triangular cross-sectional shape, the V-shaped portion of the locking band can be easily engaged with the recesses between the reinforcing portions. In particular, the V-shaped portions can be easily engaged with the respective concave portions by arranging the reinforcing portions having a triangular cross-sectional shape at the four equal positions in the circumferential direction of the joint member.

It is a side view of the joint member with a flange concerning an embodiment. It is sectional drawing which follows the pipe-axis direction of the joint member with a flange of FIG. It is the III-III arrow directional view of FIG. It is the IV-IV sectional view taken on the line of FIG. It is the VV sectional view taken on the line of FIG. It is IV arrow line view of FIG. It is sectional drawing which shows the connection structure of the joint member with a flange which concerns on embodiment. It is a perspective view of a locking band. It is sectional drawing of a locking band. It is the XX sectional view taken on the line of FIG. It is the XI-XI sectional view taken on the line of FIG. It is a perspective view of the quick fastener of patent document 1. FIG.

  The flanged joint member and connection structure according to the embodiment will be described below with reference to FIGS.

  As shown in FIGS. 1 to 6, a flanged joint member 1 according to this embodiment includes a tubular joint member main body 2 and a flange 3 projecting outwardly from the outer periphery of the distal end of the joint member main body 2. And reinforcing portions 10 to 19 for reinforcing the flange 3. As the resin constituting the flanged joint member 1, any conventionally known resin can be used, and there is no particular limitation. Specifically, for example, a synthetic resin material having relatively low strength, such as a vinyl chloride resin, is relatively formed, and is integrally formed including the joint member main body 2, the flange 3, and the reinforcing portions 10 to 19. .

  The joint member main body 2 has a substantially cylindrical shape having a hole 2c penetrating from the front end side 2a to the rear end side 2b. A predetermined range from the distal end side 2a of the hole 2c is a cylindrical surface 2d having an equal diameter into which the branch pipe 30 of the header is inserted. The inner peripheral surface of the tip portion of the hole 2c is a tapered surface 2e having a diameter increasing toward the tip side 2a.

  The flange 3 is provided in an outward flange shape that stands up in a radial direction from the distal end side 2 a of the joint member main body 2. Reinforcing portions 10 to 19 are provided at corners where the rear surface of the flange 3, that is, the surface 3 a facing the rear end side 2 b and the outer peripheral surface 2 f of the joint member body 2 intersect.

  The reinforcing portions 10 to 19 are provided at intervals in the circumferential direction of the joint member body 2, and concave portions 20 to 29 are formed between the reinforcing portions 10 to 19 adjacent to each other in the circumferential direction.

  As clearly shown in FIGS. 4 to 6, the reinforcing portions 10, 12, 13, 15, 17, 18 are substantially trapezoidal columnar shapes in which the cross-sectional shape perpendicular to the axial center line of the joint member body 2 is substantially trapezoidal. Reference numerals 11, 14, 16, and 19 are substantially triangular column shapes each having a substantially triangular cross-sectional shape perpendicular to the axial center line of the joint member body 2. The substantially triangular columnar reinforcing portions 11, 14, 16, 19 are located between the substantially trapezoidal columnar reinforcing portions 10, 12, 13, 15, 15, 17, and 18, 10, respectively. The column directions of the substantially trapezoidal columnar reinforcing portions 10, 12, 13, 15, 17, and 18 and the column directions of the substantially triangular columnar reinforcing portions 11, 14, 16, and 19 are all from the back side surface 3 a of the flange 3. The direction is toward the rear end side 2b.

  The reinforcing portions 10 to 19 have a larger circumferential width (length in the circumferential direction of the joint member body 2) toward the base side that is the outer peripheral surface 2f side of the joint member body 2.

The central angle θ ₁ of the base portion of the reinforcing portions 10 to 19 with respect to the axis of the joint member body 2 is preferably about 36 to ₁ °. Central angle theta ₂ with respect to the axis of the joint member main body 2 of the base of the recess 20 to 29 is preferably about 1-36 °.

  The height of the reinforcing portions 10 to 19 from the outer peripheral surface 2f is equal to or slightly smaller than the height of the flange 3 from the outer peripheral surface 2b. The ratio of the height from the outer peripheral surface 2f of the reinforcing portions 10 to 19 to the height of the flange 3 from the outer peripheral surface 2f is preferably about 50 to 100%, particularly about 80 to 90%.

  The height of the flange 3 from the outer peripheral surface 2f is preferably about 20 to 40%, particularly about 32 to 38% of the outer diameter (radius) r of the joint member body 2 closest to the flange 3.

The percentage ratio t ₂ / t ₁ × 100% of the thickness t _{2 of the} reinforcing member 10 to 19 in the axial center line direction of the joint member body 2 and the thickness t ₁ of the flange 3 is 50 to 200%, particularly 55 to 70. % Is preferred.

  The branch pipe 30 will be described with reference to FIG. As the resin constituting the branch pipe 30, any conventionally known resin can be used, and there is no particular limitation. Specifically, for example, it is made of high-strength synthetic resin such as PPS (polyphenylene sulfide), PPSU (polyphenylsulfone). The distal end side of the branch pipe 30 is an equal-diameter cylindrical insertion portion 31 that is inserted into the cylindrical surface 2 d, and a flange 32 is provided on the outer peripheral surface of the portion that continues to the insertion portion 31. The rear side of the flange 32 (the side away from the tip side) is a branch pipe main body 33 having a smaller diameter than the flange 32.

  The outer peripheral surface of the insertion portion 31 is provided with a plurality of O-ring mounting grooves 34 (two in this embodiment) that circulate in the circumferential direction, and O-rings 35 are mounted respectively.

  A locking band 40 for connecting the joint member 1 and the branch pipe 30 will be described with reference to FIGS. FIG. 9 is a cross-sectional view perpendicular to the tube axis direction of the locking band 40 and shows a cross section passing through the center in the width W direction.

  The locking band 40 has a substantially C-shaped annular shape, and is provided with a standing piece 41 on one end side in the circumferential direction and a claw piece 42 on the other end side. The locking band 40 is provided with arc-shaped portions 51 to 60 extending in the circumferential direction surrounding the flanges 3 and 32. V-shaped portions 61 to 69 projecting inward of the annular locking band 40 are provided between the arc-shaped portions 51 to 60. The V-shaped portions 61 to 69 are provided with openings 71 to 79 into which the flanges 3 and 32 are inserted. The openings 71 to 79 also enter part of the arcuate portions 51 to 60. The openings 71 to 79 are provided in the central portion of the locking band 40 in the width W direction.

  The arc-shaped portion 51 is provided with an opening 43 with which the claw piece 42 is engaged. The upright piece 41 stands from the edge of the arcuate portion 51. The upright piece 41 stands upright from the arcuate part 51 in the diameter increasing direction and the arcuate part 60 direction.

  The claw piece 42 is formed by cutting and raising from the arc-shaped portion 60, and the arc-shaped portion 60 has an opening 44 that is a cut-and-raised mark. The claw piece 42 rises diagonally from the arcuate portion 60 in the diameter increasing direction and away from the upright piece 41.

  In order to connect the branch pipe 30 and the joint member 1, the insertion portion 31 having the O-ring 35 is inserted into the hole 2 c from the distal end side 2 a of the joint member 1 and the flanges 3 and 32 are brought into contact with each other. The O-ring 35 is in watertight contact with the inner peripheral surface of the cylindrical surface 2d. Next, the locking band 40 is disposed so as to surround the outer periphery of the flanges 3 and 32, and then the locking band 40 is reduced in diameter so that the arcuate portions 51 and 60 are brought close to each other.

  If it does so, each V-shaped part 61-69 will enter nine things among the recessed parts 20-29, and the flanges 3 and 32 will enter the openings 71-79. Further, when the diameter of the locking band 40 is reduced, the arc-shaped portion 60 is brought into the lower side of the arc-shaped portion 51 (the joint member 1 and the branch pipe 30 side), and the arc-shaped portion 60 is brought close to the V-shaped portion 61. The claw piece 42 enters the opening 43, and the claw piece 42 engages with the edge of the opening 43 on the upright piece 41 side. Thereby, the arc-shaped portions 51 and 60 are connected to each other, and the locking band 40 is closed.

  In this state, nine locations in the circumferential direction of the flanges 3 and 32 enter the openings 71 to 79 of the locking band 40 and are sandwiched by the locking bands 40, thereby preventing the flanges 3 and 32 from separating.

  In this joint member 1, since ten reinforcing portions 10 to 19 are provided at the intersection corners of the flange 3 and the outer peripheral surface 2 f, the strength of the flange 3 is high, and the durability of the flange 3 is also high. It is good.

  In this embodiment, four reinforcing portions 11, 14, 16, 19 out of the reinforcing portions 10 to 19 have a triangular prism shape, and the apex portion of the triangle is directed outward in the radial direction of the joint member body 2. ing. Therefore, when the locking band 40 is wound around the flanges 3 and 32 and the arc-shaped portions 51 and 60 are brought close to each other to reduce the diameter of the locking band 40, the reinforcing portions 11 and 69 among the V-shaped portions 61 to 69. What hits 14, 16, 19 is guided by the triangular prism-shaped reinforcing portions 11, 14, 16, 19, and moves in the circumferential direction. That is, the locking band 40 rotates slightly in the circumferential direction, and all the V-shaped portions 61 to 69 smoothly enter the recesses 20 to 29.

  As a result, the locking band 40 is smoothly reduced in diameter, the arcuate portion 60 is sufficiently close to the V-shaped portion 61, and the claw portion 42 enters the opening 43 smoothly. Therefore, the mounting operation of the locking band 40 can be easily performed. As shown in FIG. 5, the triangular prism-shaped reinforcing portions 11, 14, 16, and 19 are disposed at approximately four equal positions in the circumferential direction of the joint member main body 2, so that the V-shaped portions 61 to 69 are respectively The reinforcing parts 11, 14, 16, 19 are guided smoothly. The other reinforcing portions 12, 13, 15, 17, and 18 are trapezoidal columnar shapes and have a larger volume than the triangular columnar reinforcing portions 11, 14, 16, and 19, so that the flange 3 has an excellent reinforcing effect and the flange 3 The strength of is sufficiently high.

  Since the openings 71 to 79 of the locking band 40 sandwich the portions of the flanges 3 and 32 where the reinforcing portions 11 to 19 are not provided on the flange 3, the widths of the openings 71 to 79 in the tube axis direction are small. . Moreover, the circumferential width of the openings 71 to 79 is also small. Therefore, the strength and rigidity of the periphery of the openings 71 to 79 of the locking band 40 are high.

  The above embodiment is an example of the present invention, and the present invention may have a configuration other than that illustrated. In the above embodiment, ten reinforcing portions 10 to 19 are provided, but about 8 to 12 may be provided. Even in this case, it is preferable to arrange trapezoidal columnar reinforcing portions on both sides in the circumferential direction of the triangular columnar reinforcing portion.

  In the said embodiment, although the branch pipe 30 of the header and the coupling member 1 are connected, it can be used for the connection with various tubular members with flanges other than the branch pipe. In the connection structure using the flanged joint member of the present invention, a reinforcing portion may be provided in the opposite connected member as in the present invention.

  That is, in the connection structure of the flanged joint member in which the connected member and the flanged joint member of the present invention are connected, the connected member includes the insertion portion inserted into the flanged joint member of the present invention, and the difference. A reinforcing portion is provided integrally with the flange and the connected member main body at a corner provided between the flange provided at a position following the insertion portion and the outer peripheral surface of the connected member main body and the flange. A plurality of the reinforcing portions are provided at spaced positions in the circumferential direction of the joint member main body at positions opposite to the reinforcing portions in the flanged joint member of the present invention. And the flange of this flanged joint member and the flange of a to-be-connected member are piled up, and it becomes a structure where separation is prevented by the locking band.

DESCRIPTION OF SYMBOLS 1 Joint member with a flange 2 Joint member main body 3 Flange 10-19 Reinforcement part 20-29 Recess 30 Branch pipe 31 Insertion part 32 Flange 35 O-ring 40 Locking band 41 Standing piece 42 Claw part 43, 44, 71-79 Opening 51-60 Arc-shaped part 61-69 V-shaped part 90 Quick fastener

Claims (7)

In a flanged joint member having a joint member main body and a flange provided on the distal end side of the joint member main body,
A reinforcing portion is provided integrally with the flange and the joint member main body at an intersection corner portion between the outer peripheral surface of the joint member main body and the flange,
A flanged joint member, wherein a plurality of the reinforcing portions are provided at intervals in the circumferential direction of the joint member body.   The flanged joint member according to claim 1, wherein 8 to 12 reinforcing portions are provided at intervals in a circumferential direction of the joint member main body.   The reinforcing part having a substantially triangular column shape in which a cross-sectional shape perpendicular to the axial center line of the joint member body is a triangle and the reinforcing part having a substantially trapezoidal column shape in which the cross-sectional shape is a trapezoid. A flanged joint member characterized by being provided.   The flanged joint member according to claim 3, wherein the substantially triangular columnar reinforcing portions are respectively arranged at approximately four equal positions in the circumferential direction of the joint member main body.   The flanged joint member according to any one of claims 1 to 4, wherein the joint member is made of a vinyl chloride resin, a polyphenylene sulfide resin, or a polyphenylsulfone resin. A connection structure of a flanged joint member in which a connected member and the flanged joint member according to any one of claims 1 to 5 are connected,
The connected member includes an insertion portion to be inserted into the flanged joint member, and a flange provided at a position subsequent to the insertion portion. The flange of the flanged joint member and the connected member A connection structure for a flanged joint member that is overlapped with a flange and is prevented from separating by a locking band.   7. The locking band according to claim 6, wherein the locking band includes an arc-shaped portion that surrounds the outer periphery of the flange, a V-shaped portion that enters a recess between the reinforcing portions, and an opening provided in the V-shaped portion. The flanged joint member connection structure is characterized in that the overlapped flange is inserted into the opening.

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