JP2019190626A - Joint member and pipe connecting structure - Google Patents

Abstract

To further stabilize the connection of a connecting cylinder part and a pipe body.SOLUTION: A joint member 10 has: a connecting cylinder part 11 into which a tip part of a pipe body 50 is inserted; a C-shaped clip 30 fitted into a peripheral groove 15 which is formed at the connecting cylinder part 11; and an annular cover 40 in which the connecting cylinder part 11 is inserted toward the inside. The clip 30 comprises claw parts 35, and connecting protrusions 32 penetratingly formed at a groove bottom wall 15H of the peripheral groove 15 while passing communication holes 16, and engaged with a second annular groove 53M of the pipe body 50. The annular cover 40 has first notches 41 for receiving the claw parts 35 when arranged so as to surround the clip 30, and an engagement protrusion 45 engaged with the peripheral groove 15 of the connecting cylinder part 11, and regulating the movement of the annular cover 40 to a direction separating from the pipe body 50.SELECTED DRAWING: Figure 11

Description

  The present disclosure relates to a joint member that prevents a tubular body inserted into a connecting cylinder part from being clipped by a clip fitted to the connecting cylinder part, and a pipe connection structure including the joint member.

  In the joint member disclosed in Patent Document 1, a U-shaped clip enters the inside of the connecting cylinder part through the communication hole formed in the cylindrical wall of the connecting cylinder part, and the clip is formed on the outer surface of the tubular body. Engaged with the annular groove formed.

Japanese Patent Laying-Open No. 2011-106604 (paragraph [0029], FIGS. 3 and 4)

  In the joint member of Patent Document 1, the clip may come off due to an external force, and further stabilization of the connection between the connecting tube portion and the tubular body has been demanded.

  In order to solve the above-mentioned problems, the invention according to claim 1 is formed in a C-shape having a connecting cylinder portion into which a distal end portion of a pipe body to be connected is inserted, and an opening in one circumferential direction. And a clip that fits into a circumferential groove formed on the outer peripheral surface of the connection tube portion, and the clip extends outwardly from at least one end portion of both end portions sandwiching the opening. And projecting on the inner peripheral surface, and entering the inside of the connecting tube portion through the communication hole formed through the groove bottom wall of the peripheral groove and formed on the outer peripheral surface of the tubular body. A coupling protrusion that engages with the annular groove, and includes a receiving recess that opens at the end facing the tubular body while forming an annular shape in which the connection tube portion is inserted inside, When the clip is enclosed from the outside, the claw portion is received in the receiving recess to An annular cover for restricting the opening, and the annular cover is engaged with the connecting tube portion or the clip in a state where the annular cover is arranged so as to surround the clip, and the annular cover is connected to the tube. It is a joint member in which a movement restricting portion that restricts movement in a direction away from the body is formed.

  According to a second aspect of the present invention, the movement restricting portion is formed by an engaging protrusion that is formed on an inner peripheral surface of the annular cover and engages with an engaging concave portion formed on the outer peripheral surface of the connecting cylinder portion. The joint member according to claim 1.

  According to a third aspect of the present invention, the depth of the circumferential groove is greater than the thickness in the radial direction of the clip, the engagement recess is formed by the circumferential groove, and the engagement protrusion is The joint according to claim 2, wherein the annular cover is restricted from moving in a direction away from the tubular body by contacting a portion of the inner surface of the groove facing the tubular body side and exposed to the outside of the clip. It is a member.

  According to a fourth aspect of the present invention, the receiving recess is formed by an opening that penetrates the annular cover in the radial direction, and the claw is configured to be visible from the outside through the opening. 3. The joint member according to claim 1.

  According to a fifth aspect of the present invention, the annular cover is provided with a notch portion that opens at an edge facing the tubular body, and the notch portion is engaged when the movement restricting portion is engaged with the connecting cylinder portion or the clip. The joint member according to any one of claims 1 to 4, wherein a portion of the opening edge of the portion facing the tubular body is disposed substantially flush with an end edge of the clip facing the tubular body. It is.

  The invention according to claim 6 is the joint member according to claim 4 or 5, wherein the annular cover is colored differently from the clip.

  The invention of claim 7 is a pipe connection structure comprising the joint member according to any one of claims 1 to 6 and the pipe body, wherein the outer side of the hose portion of the pipe body is a heat insulating material. A small-diameter cylindrical portion that is fixed to a distal end portion of a drain hose that is covered with a distal end portion and a proximal-end portion is inserted into the hose portion, and the small-diameter cylindrical portion. A drain hose contact portion projecting outward from an intermediate portion of the drain hose, and a distal end of the drain hose being abutted; and an outer edge portion of the drain hose contact portion extending to a proximal end side of the small diameter cylindrical portion; It is a pipe connection structure provided with the said hose part and the large diameter cylinder part which pinches | interposes the said heat insulating material in between.

  In the invention according to claim 8, the annular cover is formed so as to be able to abut against the drain hose contact portion, and the movement restricting portion is configured such that when the annular cover is abutted against the drain hose contact portion, The pipe connection structure according to claim 7, wherein the pipe connection structure is engaged with the connection tube portion or the clip.

  In the first and seventh aspects of the invention, since the opening of the clip is restricted when the annular cover surrounds the clip from the outside, the clip is prevented from being detached by an external force, and the connection between the connecting tube portion and the tubular body is stabilized. Is planned. Further, in a state where the annular cover surrounds the clip from the outside, movement of the annular cover in a direction away from the tube body is restricted by a movement restricting portion provided on the annular cover. Thereby, it becomes easy to maintain the annular cover in a state of surrounding the clip from the outside.

  Here, when the receiving recess for receiving the claw portion of the clip is closed on the side opposite to the tube body, the annular cover moves in a direction approaching the tube body by the contact between the inner surface of the receiving recess portion and the claw portion. Therefore, the annular cover can be fixed in a state in which the clip is surrounded from the outside. Further, the tubular body is fixed to the distal end portion of the drain hose in which the outside of the hose portion is covered with a heat insulating material, and a small-diameter cylindrical portion in which a base end portion is inserted into the hose portion, and a small-diameter cylindrical portion A drain hose contact portion projecting outward from the intermediate portion and abutting the end of the drain hose, and a hose portion extending from the outer edge portion of the drain hose contact portion to the proximal end side of the small diameter cylindrical portion and the small diameter cylindrical portion And a large-diameter cylindrical portion sandwiching the heat insulating material (the invention of claim 7), the annular cover can be abutted against the drain hose abutting portion, and the movement restricting portion is annular in the abutting state. By adopting a configuration that engages with the cover or the connecting cylinder portion, the annular cover is restricted from moving in the direction approaching the tubular body, and thus the annular cover can be fixed in a state of surrounding the clip from the outside ( (Invention of Claim 8)

  When the movement restricting portion engages with the connecting tube portion, the movement restricting portion may be an engaging protrusion that engages with an engaging recess formed on the outer peripheral surface of the connecting tube portion. Invention), and a recess that engages with a protrusion formed on the outer peripheral surface of the connecting tube portion. In the former case, if the peripheral groove of the connecting tube portion is used as the engaging recess, there is no need to newly provide an engaging recess in the connecting tube portion. Specifically, the depth of the circumferential groove is made larger than the radial thickness of the clip so that the engaging protrusion comes into contact with the portion of the inner surface of the circumferential groove that faces the tube side and is exposed to the outside of the clip. (Invention of claim 3).

  When the receiving recess for receiving the clip's claw is configured with an opening that penetrates the annular cover in the radial direction, the presence or absence of the clip can be determined by whether or not the claw can be seen through the opening. (Invention of claim 4) In addition, the annular cover is formed with a notch that opens at the edge facing the tube, and when the movement restricting portion is engaged with the connecting tube portion or the clip, the portion of the opening edge of the notch facing the tube is If the clip is arranged so as to be substantially flush with the edge facing the tube body, whether the movement restricting portion is engaged with the connecting tube portion or the clip depends on whether the clip is visible through the notch portion. This can be confirmed (the invention of claim 5). In any case, if the annular cover is colored differently from the clip, the annular cover and the clip can be easily distinguished from each other, and the clip can be easily recognized through the notch or the opening (the invention of claim 6). .

Schematic configuration diagram of a drain pipe in which the pipe connection structure according to the first embodiment is used. Side view of pipe connection structure (A) The perspective view seen from the front end side of a tubular body, (B) The perspective view seen from the base end side Perspective view around the fitting part of the joint member Perspective view around the fitting part of the connecting tube part (A) Perspective view seen from the side opposite to the opening of the clip, (B) Perspective view seen from the opening side Flat cross-sectional view of clip fitted in circumferential groove (A) The perspective view seen from the front end side of the annular cover, (B) The perspective view seen from the base end side (A) Front view of the pipe connection structure when the annular cover is arranged on the proximal end side of the connection cylinder part from the clip, (B) Front view of the pipe connection structure when the annular cover is arranged outside the clip Cross section of pipe connection structure Side sectional view of the pipe connection structure when the annular cover is placed outside the clip (A) Side sectional view of the engaging protrusion entering the circumferential groove, (B) Side sectional view of the engaging protrusion disposed on the proximal end side of the connecting tube portion from the circumferential groove. (A) The perspective view seen from the front end side of the annular cover which concerns on 2nd Embodiment, (B) The perspective view seen from the base end side Front view of pipe connection structure Side sectional view which shows the engagement state of the protrusion and recessed part which concern on other embodiment (A) The perspective view seen from the front end side of the annular cover which concerns on other embodiment, (B) The perspective view seen from the base end side Cross section of pipe connection structure

[First Embodiment]
Hereinafter, the joint member 10 and the pipe connection structure 100 according to the first embodiment will be described with reference to FIGS. As shown in FIGS. 1 and 2, the pipe connection structure 100 according to the present embodiment is used for a drain pipe 112 that drains drain water generated in an air conditioner 110 to a drain drain pipe 111, and the drain of the air conditioner 110 is used. The joint member 10 is connected to the discharge port 110 </ b> A or the drain drain pipe 111, and the pipe body 50 is attached to the end portion of the drain hose 120. In addition, the drain piping 112 is installed in the ceiling, and is routed in the reverse U shape by which the intermediate part was lifted up.

  As shown in FIGS. 3A and 3B, the pipe body 50 includes a small-diameter cylindrical portion 51, a drain hose contact portion 55 projecting outward from an axial intermediate portion of the small-diameter cylindrical portion 51, and And a large-diameter cylindrical portion 56 extending from the outer edge portion of the drain hose contact portion 55 to the proximal end side of the small-diameter cylindrical portion 51. As shown in FIG. 2, the tubular body 50 is in a state where the small-diameter cylindrical portion 51 is inserted into the drain hose 120 from the proximal end side and the drain hose contact portion 55 is abutted against the end surface of the drain hose 120. , Fixed to the drain hose 120. Here, the drain hose 120 has a two-layer structure in which the outer side of the hose part 121 is covered with a heat insulating material 122, and the base end part of the small diameter cylindrical part 51 is inserted inside the hose part 121, and the large diameter cylinder is formed. The hose part 121 and the heat insulating material 122 are sandwiched between the part 56 and the small diameter cylindrical part 51.

  The tube body 50 is fixed to the drain hose 120 using an adhesive or the like. Specifically, an adhesive is applied in advance to the inner peripheral surface of the hose portion 121 of the drain hose 120, the outer peripheral surface and the front end surface of the heat insulating material 122, and the outer peripheral surface of the small-diameter cylindrical portion 51 of the tube body 50. The tubular body 50 is fixed to the drain hose 120 by inserting the small-diameter cylindrical portion 51 of the body 50 into the drain hose 120. In order to facilitate the insertion of the small diameter cylindrical portion 51 into the drain hose 120, the length of the portion of the small diameter cylindrical portion 51 that is disposed on the proximal side from the drain hose contact portion 55 is larger than that of the large diameter cylindrical portion 56. The outer peripheral surface of the base end portion of the small-diameter cylindrical portion 51 is formed in a tapered shape that is gradually reduced in diameter toward the base end side.

  The tube body 50 is formed of, for example, a thermoplastic resin, and is formed of a soft polyvinyl chloride resin, a hard polyvinyl chloride resin, a polyolefin resin, or the like. The thermoplastic resin forming the tubular body 50 may be either a transparent resin or an opaque resin. Further, the hose portion 121 of the drain hose 120 is preferably formed of, for example, a thermoplastic resin, and is formed of a polyolefin-based resin, a vinyl chloride resin, or the like. The heat insulating material 122 is preferably formed of a foam of a thermoplastic resin such as polyolefin resin (for example, polyethylene resin, polypropylene resin), foam rubber, or the like.

  As shown in FIG. 3A, a first enlarged diameter portion 52 and a second enlarged diameter portion 53 are formed in order from the distal end side in a portion of the small diameter cylindrical portion 51 on the distal end side from the drain hose contact portion 55. Has been. A first annular groove 52M to which an O-ring (not shown) is attached is formed on the outer peripheral surface of the first enlarged diameter portion 52. A second annular groove 53 </ b> M that engages with the clip 30 of the joint member 10 described later is formed on the outer peripheral surface of the second enlarged diameter portion 53. In the present embodiment, the first enlarged-diameter portion 52 is configured to include two first annular grooves 52M, but may be configured to include only one first annular groove 52M, or include three or more. It may be a configuration.

  As shown in FIGS. 2 and 4, the joint member 10 includes a connection cylinder portion 11, a clip 30, and an annular cover 40. In addition, the connection cylinder part 11, the clip 30, and the cyclic | annular cover 40 are formed with the thermoplastic resin. Specifically, the connecting tube portion 11 is preferably formed of a soft polyvinyl chloride resin, a hard polyvinyl chloride resin, a polyolefin resin, or the like. The clip 30 is preferably formed of a polyamide resin such as polyacetal resin or nylon 66. The annular cover 40 is preferably formed of a polyolefin resin, a polyamide resin, or the like. Note that the thermoplastic resin forming the connecting cylinder portion 11, the clip 30, and the annular cover 40 may be either a transparent resin or an opaque resin. If at least the connecting tube portion 11 is formed of a transparent thermoplastic resin, the inside of the connecting tube portion 11 can be visually confirmed from the outside, and the state of drain water flowing in the tube can be recognized. If the pipe body 50, the clip 30, and the annular cover 40 are formed of a transparent thermoplastic resin in addition to the connection cylinder portion 11, the situation of the drain water flowing in the pipe can be recognized over a wide range.

  As shown in FIGS. 2 and 5, the connecting cylinder portion 11 includes an elbow portion 12 that is curved in an L shape, and a drain discharge port 110 </ b> A or a drain drain pipe that is connected to one end of the elbow portion 12. 111 (see FIG. 1), a connecting end 13 connected to the other end of the elbow 12, and a fitting 14 that fits into the small-diameter tube 51 of the tubular body 50 from the outside. It is equipped with. In the present embodiment, in the joint member 10, the side on which the fitting portion 14 is disposed is referred to as a distal end side, and the side on which the connection end portion 13 is disposed is appropriately referred to as a proximal end side.

  The fitting part 14 has a structure in which the tip part away from the elbow part 12 is enlarged in a stepped shape, and the opening of the enlarged diameter part 14K is an insertion port 11A (see FIG. 5). A circumferential groove 15 (see FIG. 5) having a C shape in plan view is formed on the outer peripheral surface of the enlarged diameter portion 14K. In addition, the non-formation part of the circumferential groove 15 in the enlarged diameter part 14K is arrange | positioned so that it may face the same side as the connection edge part 13 seeing from the central-axis direction of the fitting part 14. FIG. In the example shown in FIG. 2, the outer diameter of the enlarged diameter portion 14 </ b> K of the fitting portion 14 is substantially the same as the outer diameter of the elbow portion 12, but may be different.

  As shown in FIG. 5, a communication hole 16 is formed through the groove bottom wall 15 </ b> H of the circumferential groove 15 so that the inside of the fitting portion 14 communicates with the circumferential groove 15. The communication hole 16 extends in the circumferential direction of the fitting portion 14, and in the groove bottom wall 15 </ b> H, one side of the groove width direction of the circumferential groove 15 (that is, the central axis direction of the fitting portion 14) (in this embodiment, It is arranged close to the distal end side of the connecting cylinder part 11. In the present embodiment, a pair of communication holes 16 are provided so as to face each other in the radial direction of the fitting portion 14; Two or more pairs may be provided so as to face each other in the radial direction. Further, only one communication hole 16 or three or more communication holes 16 may be provided.

  As shown in FIGS. 6A and 6B, the clip 30 includes a C-shaped ring portion 31 having an opening 31A at one circumferential position, and both end portions sandwiching the opening 31A in the ring portion 31. And a pair of claw portions 35, 35 extending outward in the radial direction of the ring portion 31. In addition, in this embodiment, although the nail | claw part 35 protrudes from the whole axial direction of the both ends of the ring part 31, you may protrude from a part of axial direction of this both ends.

  The ring portion 31 can be elastically deformed so as to widen the opening 31A from the state shown in FIGS. 6 (A) and 6 (B). Then, the clip 30 changes between a closed state shown in FIGS. 6A and 6B and an open state in which the opening 31A is wider than the closed state. The inner diameter of the ring portion 31 in the closed state is substantially the same as the outer diameter of the groove bottom wall 15H of the circumferential groove 15 in the fitting portion 14, and the ring portion 31 is fitted into the circumferential groove 15 (FIG. 7). reference).

  As shown in FIG. 7, the pair of claw portions 35, 35 are formed in a tapered shape that becomes narrower in the circumferential direction of the ring portion 31 toward the radially outer side of the ring portion 31. Specifically, the surface 35M1 of the pair of claw portions 35, 35 facing in the circumferential direction of the ring portion 31 is formed substantially perpendicular to the circumferential direction of the ring portion 31, and the pair of claw portions 35, 35 35, the surface 35M2 facing the opposite side in the circumferential direction of the ring portion 31 is curved so as to move away from the opening 31A of the ring portion 31 toward the radially inner side of the ring portion 31 (that is, the base end side of the claw portion 35). R shape is formed. Note that the surface 35M2 may be formed substantially perpendicular to the circumferential direction of the ring portion 31, like the surface 35M1.

  On the inner peripheral surface of the ring portion 31, a pair of connecting projections 32, 32 project toward the center of the ring portion 31. The pair of connecting protrusions 32, 32 are formed in an arc shape extending along the ring portion 31, and are arranged so as to face the communication hole 16 of the fitting portion 14 in the radial direction of the ring portion 31. Has been. Then, in a state where the ring portion 31 is fitted in the circumferential groove 15, the pair of connection protrusions 32 and 32 enter and engage with the pair of communication holes 16 and 16. Here, the protruding amount of the connecting protrusion 32 is larger than the thickness of the groove bottom wall 15 </ b> H of the circumferential groove 15, and the connecting protrusion 32 enters the inside of the fitting portion 14.

  As shown in FIG. 6A and FIG. 6B, the pair of connecting protrusions 32 and 32 are arranged close to one side in the central axis direction of the ring portion 31, and When the front and back are reversed, the pair of communication holes 16, 16 are prevented from entering. Moreover, the inner peripheral part (tip part of the protrusion direction of the connection protrusion 32) of each connection protrusion 32 is formed in the taper shape by which the one side of the center axis direction of the ring part 31 was formed in the taper shape. Then, the tip inclined surface 32 </ b> K toward the one side in the central axis direction of the ring portion 31 as the surface facing the one side in the central axis direction of the ring portion 31 in the inner peripheral portion of the coupling protrusion 32 moves away from the center of the ring portion 31. It has become. The connecting protrusion 32 may not have the tip inclined surface 32K.

  As shown in FIG. 7, the portion of the inner peripheral surface of the coupling protrusion 32 that is opposite to the opening 31 </ b> A (see FIGS. 6A and 6B) of the ring portion 31 is chamfered. . This facilitates the insertion of the connecting protrusion 32 into the communication hole 16. Further, the connecting protrusion 32 includes a protrusion 32T that protrudes from the inner peripheral portion thereof toward the opening 31A of the ring portion 31. As a result, the connecting protrusion 32 inserted into the communication hole 16 is difficult to come off from the communication hole 16. In addition, the structure which does not have the protrusion 32T may be sufficient as the connection protrusion 32. FIG.

  As shown in FIGS. 8A and 8B, the annular cover 40 is formed in an annular shape, and the fitting portion 14 (see FIG. 4) of the connecting cylinder portion 11 is inserted inside the annular cover 40. The The inner diameter of the annular cover 40 is substantially the same as the outer diameter of the expanded portion 14K of the fitting portion 14. In the annular cover 40 of the present embodiment, the radial thickness (wall thickness) is smaller than the axial length.

  As shown in FIG. 8A, the annular cover 40 of the present embodiment is formed with a first notch 41 that is open at one end of the annular cover 40 in the axial direction. A pair of first notches 41 are provided at intervals in the circumferential direction of the annular cover 40. Here, the annular cover 40 is attached to the fitting portion 14 of the connection tube portion 11 so that the open end of the first cutout portion 41 faces the tip end side of the connection tube portion 11. Therefore, the open end of the first cutout 41 faces the tube body 50 (see FIG. 9A). The pair of first cutout portions 41 and 41 are arranged so that when the annular cover 40 is disposed so as to surround the clip 30 attached to the circumferential groove 15 of the fitting portion 14 from the outside, Receiving claw portions 35, 35 are formed (see FIG. 9B). In the present embodiment, one end of the annular cover 40 in the axial direction (that is, the end portion where the first cutout portion 41 is opened) and the other end are appropriately referred to as a distal end and a proximal end of the annular cover 40. In addition, the 1st notch part 41 of this embodiment should just be formed according to the form of the nail | claw part 35 provided in the clip 30. FIG. For example, when the claw portion 35 protrudes from a part in the axial direction at both end portions of the ring portion 31, the cutout degree of the first cutout portion 41 may be adjusted according to the claw portion 35.

  As shown in FIG. 10, the cross-sectional shape of the first notch portion 41 as viewed from the axial direction of the annular cover 40 is substantially the same as the shape of the claw portion 35 as viewed from the axial direction of the clip 30. Specifically, the first cutout portion 41 is formed in a tapered shape that becomes narrower in the circumferential direction of the annular cover 40 toward the radially outer side of the annular cover 40. A surface 41M1 that faces the surface 35M1 of the claw portion 35 is formed substantially perpendicular to the circumferential direction of the annular cover 40, and a surface 41M2 that faces the surface 35M2 of the claw portion 35 faces inward in the radial direction of the annular cover 40. It is formed in an R shape that is curved away from 41M1.

  As shown in FIG. 8B, the first cutout 41 is formed in a rectangular shape, and is disposed over substantially the entire axial direction of the annular cover 40. A portion of the opening edge of the first notch 41 that faces the open end of the first notch 41 is provided with a reinforcing rib 42 that protrudes radially outward of the annular cover 40 and extends in the circumferential direction of the annular cover 40. It has been.

  As shown in FIGS. 8A and 8B, the annular cover 40 is formed with a rectangular second notch 43 that is open at the tip of the annular cover 40 in addition to the first notch 41. Has been. The second notch 43 is formed at the tip of the annular cover 40, and the length of the annular cover 40 in the axial direction is shorter than that of the first notch 41. A plurality (two in this embodiment) of the second notches 43 are provided, and a partition wall 44 is formed between the second notches 43 adjacent to each other in the circumferential direction of the annular cover 40. .

  An engagement protrusion 45 extending along the circumferential direction is formed on the inner peripheral surface of the annular cover 40. The engagement protrusion 45 is disposed at the base end portion of the annular cover 40 and is formed in an arc shape in a region excluding the portion where the pair of first cutout portions 41, 41 is formed in the annular cover 40. The inner diameter of the engagement protrusion 45 is slightly smaller than the outer diameter of the enlarged diameter portion 14K of the fitting portion 14 and larger than the outer diameter of the ring portion 31 of the clip 30 (see FIG. 12B).

  The cross-sectional shape when the engagement protrusion 45 is cut at an arbitrary position in the circumferential direction is formed in a triangular shape in which the inner diameter decreases as the distance from the distal end and the proximal end of the annular cover 40 increases. Thereby, interference with the engagement protrusion 45 and the enlarged diameter part 14K of the fitting part 14 is suppressed, and the enlarged diameter part 14K can be inserted inside the annular cover 40. In addition, the cross-sectional shape of the engaging protrusion 45 may be formed in a triangular shape in which the inner diameter decreases with increasing distance from the tip of the annular cover 40. In this case, the effect of preventing the annular cover 40 from coming off to the proximal end side can be enhanced.

  As shown in FIGS. 2 and 10, in the pipe connection structure 100 of the present embodiment, the small-diameter cylindrical portion 51 of the tubular body 50 is inserted into the fitting portion 14 of the connecting cylindrical portion 11 in the joint member 10, and the clip 30 A portion of the connecting protrusion 32 that has entered the inside of the fitting portion 14 engages with the second annular groove 53 </ b> M of the small diameter cylindrical portion 51. Then, the tube body 50 is prevented from coming off from the connecting tube portion 11 by the engagement between the connecting projection 32 and the second annular groove 53M. In addition, between the fitting part 14 and the small diameter cylinder part 51 is sealed by an O-ring (not shown) attached to the first annular groove 52M.

  In the present embodiment, the tubular body 50 can be inserted into the fitting portion 14 in a state where the ring portion 31 of the clip 30 is fitted in the circumferential groove 15 of the fitting portion 14. In other words, in a state where the ring portion 31 is fitted in the circumferential groove 15, the connecting projection 32 of the clip 30 enters the inside of the fitting portion 14. When the tubular body 50 is inserted into the fitting portion 14, the distal end portion (specifically, the second enlarged diameter portion 53) of the tubular body 50 comes into contact with the distal inclined surface 32 </ b> K of the connecting projection 32. And the 2nd enlarged diameter part 53 can be inserted in the back | inner side of the fitting part 14, expanding the ring part 31 outside by contact | abutting with the front-end | tip inclination surface 32K. The ring portion 31 pushed and expanded by the insertion of the second enlarged diameter portion 53 is restored by its own elastic force when the connecting projection 32 is overlapped with the second annular groove 53M.

  By the way, in this embodiment, when the fitting part 14 of the connection cylinder part 11 is inserted inside the annular cover 40 and the annular cover 40 is disposed so as to surround the clip 30 from the outside, a pair of the clips 30 is provided. Are received in the pair of first cutouts 41, 41 of the annular cover 40 (see FIG. 10). Thereby, a pair of nail | claw parts 35 and 35 are controlled from receiving an external force and mutually separating.

  In this embodiment, as shown in FIG. 9B, the claw portion 35 can be seen from the outside through the first cutout portion 41 even when the annular cover 40 surrounds the clip 30 from the outside. Yes. That is, the 1st notch part 41 comprises the opening part which makes the clip 30 visible visually from the outside. Thereby, in this embodiment, it is possible to determine whether or not the clip 30 is fitted in the circumferential groove 15 in a state where the annular cover 40 is disposed outside the circumferential groove 15.

  As shown on the left side of FIG. 11, the annular cover 40 is a portion of the opening edge of the first notch 41 that faces the front end side of the annular cover 40 (that is, a portion that faces the open end of the first notch 41). Is brought into contact with the claw portion 35 so as to be restricted from approaching the tubular body 50. When the drain hose contact portion 55 of the tubular body 50 projects outward from the annular cover 40 (that is, the outer diameter of the large diameter cylindrical portion 56 is larger than the outer diameter of the annular cover 40), the annular cover 40 is By approaching the drain hose contact portion 55 of the tubular body 50, the approach to the tubular body 50 may be restricted.

  As shown in FIG. 11, when the claw portion 35 abuts the portion of the opening edge of the first cutout portion 41 that faces the open end, the engagement protrusion 45 of the annular cover 40 has a diameter of the fitting portion 14. It is overlaid on the circumferential groove 15 when viewed from the direction. Here, the outer diameter of the ring portion 31 of the clip 30 is smaller than the outer diameter of the enlarged diameter portion 14K of the fitting portion 14, and is opposed to the inner surface of the circumferential groove 15 in the axial direction of the fitting portion 14. A part of the surface is exposed outside the ring portion 31. In addition, the inner diameter of the engagement protrusion 45 is smaller than the outer diameter of the enlarged diameter portion 14K of the fitting portion 14 and larger than the outer diameter of the ring portion 31. Accordingly, as shown in an enlarged view in FIG. 12A, the engaging protrusion 45 enters the circumferential groove 15 and faces the front surface 45M (that is, the inner surface of the circumferential groove 15 facing the distal end side of the connecting cylinder portion 11). The opposing surface 45M is a surface facing the tubular body 50.). Thereby, the annular cover 40 is also restricted from moving in a direction away from the tube body 50. As described above, the cross-sectional shape when the engagement protrusion 45 is cut at an arbitrary position in the circumferential direction is a triangular shape whose inner diameter decreases as the distance from the distal end and the proximal end of the annular cover 40 increases. When the enlarged diameter portion 14K is inserted into the inner side of the annular cover 40, the engaging protrusion 45 can smoothly get over the portion of the enlarged diameter portion 14K that is disposed on the proximal side from the circumferential groove 15. Become.

  In this embodiment, as shown in FIG. 12A, when the engagement protrusion 45 of the annular cover 40 enters the circumferential groove 15, the end disposed on the distal end side of the connection cylinder portion 11 in the clip 30. Of the opening edge of the second notch 43 in the annular cover 40, the edge and the portion facing the open end of the second notch 43 are arranged substantially flush. In this state, it is difficult to visually recognize the clip 30 through the second notch 43. On the other hand, as shown in FIG. 12 (B), when the engagement protrusion 45 of the annular cover 40 is disposed closer to the proximal end side of the connection tube portion 11 than the circumferential groove 15, the clip is passed through the second notch 43. 30 becomes visible. That is, in this embodiment, the state in which the annular cover 40 is restricted from moving in the direction away from the tubular body 50 depending on whether or not the clip 30 is visible through the second notch 43 (that is, the annular cover 40 is normal). It is possible to determine whether or not it is in a state of being arranged at a position.

  Here, if the clip 30 and the annular cover 40 have different colors, the clip 30 and the annular cover 40 can be easily distinguished from each other. As a result, whether or not the clip 30 is fitted in the circumferential groove 15 can be easily determined based on whether or not the claw portion 35 of the clip 30 is visible through the first cutout portion 41, and the second cutout portion 43. It is possible to easily determine whether or not the annular cover 40 is disposed at a normal position (that is, whether or not the engaging protrusion 45 has entered the circumferential groove 15) depending on whether or not the clip 30 can be seen through. it can.

  In addition, the 2nd notch part 43 can also be utilized when removing the annular cover 40 from the enlarged diameter part 14K. That is, by inserting a tool such as a pen or a flat-blade screwdriver into the second cutout portion 43 and moving the annular cover 40 toward the proximal end side of the connecting cylinder portion 11, the engagement protrusion 45 and the circumferential groove 15 ( The engagement with the facing surface 45M) can be released.

  As described above, in the joint member 10 and the pipe connection structure 100 according to the present embodiment, when the annular cover 40 surrounds the clip 30 from the outside, the pair of first notches 41 and 41 are paired with the pair of claws 35 and 35. Is received, the opening of the clip 30 is regulated. Thereby, it is suppressed that the clip 30 remove | deviates by external force, and stabilization of the connection of the connection cylinder part 11 and the tubular body 50 is achieved. Here, in a state where the annular cover 40 surrounds the clip 30 from the outside, the movement of the annular cover 40 in the direction away from the tube body 50 is restricted by the engagement protrusion 45 provided on the annular cover 40. Thereby, it becomes easy to maintain the annular cover 40 in a state of surrounding the clip 30 from the outside. Moreover, in the present embodiment, the portion of the opening edge of the first notch 41 that faces the open end of the first notch 41 abuts on the claw portion 35, so that the annular cover 40 approaches the tube body 50. Since movement is restricted, the annular cover 40 can be fixed in a state in which the clip 30 is surrounded from the outside.

  In the present embodiment, the engaging protrusion 45 engages with the circumferential groove 15 into which the clip 30 is fitted. Therefore, it is necessary to newly provide a concave portion that engages with the engaging protrusion 45 in the connecting cylinder portion 11. Thus, the connecting cylinder portion 11 can be made compact.

  In the present embodiment, since the pair of claw portions 35 and 35 are visible through the pair of first cutout portions 41 and 41, the annular cover 40 surrounds the circumferential groove 15 from the outside. However, the presence or absence of the clip 30 can be determined based on whether or not the claw portion 35 is visible through the first cutout portion 41. Further, in the present embodiment, when the engagement protrusion 45 of the annular cover 40 enters the circumferential groove 15, the end edge of the clip 30 disposed on the distal end side of the connection cylinder portion 11 and the second cutout portion 43. The portion of the opening edge that faces the open end of the second notch 43 is disposed substantially flush, so that the engagement protrusion 45 can be rotated depending on whether or not the clip 30 is visible through the second notch 43. It is possible to confirm whether or not the annular cover 40 is disposed at a normal position by engaging with the groove 15.

[Second Embodiment]
In the present embodiment, the annular cover 40 of the first embodiment is modified. Specifically, as shown in FIGS. 13A and 13B, in the annular cover 40V of the present embodiment, the shape of the first notch 41V is the first notch 41 of the first embodiment. Is different. The first cutout portion 41V includes a guide portion 41VA extending linearly from the distal end edge of the annular cover 40 toward the base end side, and a housing portion extending from the base end portion of the guide portion 41VA to one side in the circumferential direction of the annular cover 40. 41VB, and is formed in an L shape. The accommodating portion 41VB is formed in a size that can accommodate the claw portion 35 of the clip 30.

  In addition, in the example shown by FIG. 13 (A) and FIG. 13 (B), although the cyclic | annular cover 40V is not provided with the 2nd notch part 43, you may provide. Further, the annular cover 40V may not include the engagement protrusion 45. About the other structure of the coupling member 10 and the pipe connection structure 100 of this embodiment, since it is the same as that of the said 1st Embodiment, description is abbreviate | omitted by attaching | subjecting the same code | symbol.

  The annular cover 40 </ b> V of the present embodiment is restricted from moving in the extending direction of the connecting cylinder portion 11 by engaging with the clip 30. Specifically, as shown in FIG. 14A, the annular cover 40V is arranged so that the tip end side (that is, the open end side of the first notch 41V) faces the tip end side of the connection tube portion 11. The 14B, the pair of guide portions 41VA and 41VA of the pair of first cutout portions 41V and 41V are arranged at the same circumferential position as the pair of claw portions 35 and 35 of the clip 30. In this state, when the annular cover 40V is operated toward the distal end side of the connection tube portion 11, the pair of claw portions 35 and 35 are received by the pair of guide portions 41VA and 41VA. Next, as shown in FIG. 14C, when the annular cover 40V is operated to rotate to the other side in the circumferential direction (that is, the side opposite to the accommodating portion 41VB with respect to the guide portion 41VA), The claw portions 35, 35 are accommodated in a pair of accommodating portions 41VB, 41VB. At this time, the claw portion 35 is sandwiched between the opening edges of the accommodating portion 41VB in the axial direction of the annular cover 40V. Then, the engagement of the accommodating portion 41VB and the claw portion 35 restricts the movement of the connecting tube portion 11 in the extending direction of the annular cover 40V.

  In order to prevent the annular cover 40V from being removed from the state shown in FIG. 14C, a retaining mechanism may be provided in one or both of the accommodating portion 41VB and the claw portion 35. As an example of the retaining mechanism, a configuration in which a protrusion is provided on a surface of the inner surface of the accommodating portion 41VB facing the axial direction of the annular cover 40V can be given. In this configuration, the annular cover 40V is prevented from rotating to one side in the circumferential direction by contacting the protrusion and the claw portion 35, and the annular cover 40V is prevented from being removed from the state of FIG. it can. Here, the protrusions may be provided at a plurality of locations, or may be provided on one or both of the inner surface of the accommodating portion 41VB and the surface facing the distal end side and the proximal end side of the annular cover 40V. Further, the claw portion 35 may be formed with a recess that engages with the protrusion.

[Other Embodiments]
(1) In the first embodiment, the engagement protrusion 45 provided on the annular cover 40 is configured to engage with the engagement recess (circumferential groove 15) provided on the connection cylinder portion 11. As shown in FIG. 15 (A), the recess 61 </ b> A provided in the annular cover 40 and the protrusion 61 </ b> T provided in the connection cylinder part 11 may be engaged.

  (2) In said (1), the protrusion 61T may be provided in the clip 30 (refer FIG. 15 (B)). In the second embodiment, it can be said that the projecting portion 61T is configured by the claw portion 35 of the clip 30, and the concave portion 61A is configured by the accommodating portion 41VB of the first cutout portion 41V.

  (3) In the first embodiment, the engagement protrusion 45 of the annular cover 40 may be configured to engage with a recess formed on the outer peripheral surface of the clip 30 (specifically, the ring portion 31). Good.

  (4) In the first embodiment, the engagement protrusions 45 of the annular cover 40 may be scattered at a plurality of locations in the circumferential direction of the annular cover 40. In the above (1) and (2), the protrusions 61 </ b> T may be scattered at a plurality of locations in the circumferential direction of the connecting tube portion 11 or the clip 30.

  (5) As shown in FIGS. 16A and 16B, the annular cover 40 may include a cover wall 46 that covers the first cutout 41 from the outside. In this case, as shown in FIG. 17, when the claw portion 35 of the clip 30 is received in the first cutout portion 41, the claw portion 35 is covered from the outside by the cover wall 46, so that external force is applied to the claw portion 35. This is regulated. If the cover wall 46 is made of a transparent member, the presence / absence of the claw portion 35 can be determined through the cover wall 46, so it is visually determined whether or not the clip 30 exists inside the annular cover 40. Can do. Even if the cover wall 46 is made of an opaque member, if the cover wall 46 is formed with a notch or a window, the presence or absence of the claw 35 can be determined through the notch or the window. it can.

  (6) In the above embodiment, the inner peripheral surface of the annular cover 40, 40V is provided with a receiving recess that opens at the tip edge of the annular cover 40, 40V, and the pair of claws 35, 35 of the clip 30 are provided in the receiving recess. It is good also as a structure which accepts. A pair of receiving recesses may be provided corresponding to the pair of claw portions 35, 35, or only one may be provided.

  (7) In the said embodiment, you may provide only the 1st notch parts 41 and 41V. In this case, the length of the first notches 41 and 41V in the circumferential direction of the annular covers 40 and 40V may be set to a length that can receive the pair of claws 35 and 35 of the clip 30.

  (8) The communication hole 16 may be formed in the center of the circumferential groove 15 in the width direction. In this case, it is good also as a structure which is not provided with the front-end | tip inclination surface 32K in the connection protrusion 32 of the clip 30. FIG.

  (9) Although the connection cylinder part 11 of this embodiment is comprised in the L shape which has the elbow part 12, you may be comprised in the I shape which used the elbow part 12 as the socket part.

  (10) In the first embodiment, the annular cover 40 may not include the reinforcing rib 42. In particular, when the claw portion 35 protrudes from a part in the axial direction at both ends of the ring portion 31 of the clip 30, the notch of the first notch portion 41 is reduced, and the annular cover can be provided without providing the reinforcing rib 42. The strength of 40 can be maintained.

  (11) In the above embodiment and the above (6), (7), and (10), the clip 30 includes one pair of claw portions 35, but may include only one. Specifically, a configuration in which the claw portion 35 protrudes from either one of both end portions sandwiching the opening 31A in the ring portion 31 may be adopted. In this case, the annular cover 40 only needs to have one first cutout 41 corresponding to the claw portion 35.

DESCRIPTION OF SYMBOLS 10 Joint member 11 Connection cylinder part 15 Circumferential groove 16 Communication hole 30 Clip 32 Connection protrusion 35 Claw part 40 Annular cover 45 Engagement protrusion 50 Tube 53M 2nd annular groove 100 Pipe connection structure

Claims (8)

A connecting tube part into which the tip of the tube to be connected is inserted, and
A clip that is formed in a C-shape having an opening at one place in the circumferential direction and that fits into a circumferential groove formed on the outer peripheral surface of the connection tube portion;
The clip includes
A claw portion extending outwardly from at least one end of both ends sandwiching the opening; and
Protrusively provided on the inner peripheral surface, enters the inside of the connecting tube portion through a communication hole formed through the groove bottom wall of the peripheral groove, and engages with an annular groove formed on the outer peripheral surface of the tubular body In the joint member provided with a connecting projection,
The connecting cylinder part has an annular shape that is inserted into the inside and a receiving recess that opens at an edge that faces the tube, and when the clip is surrounded from the outside, the claw part is received in the receiving recess. Having an annular cover that restricts the opening of the clip;
The annular cover restricts movement of the annular cover in a direction away from the tubular body by engaging with the connecting tube portion or the clip in a state where the annular cover is disposed so as to surround the clip. The joint member in which the movement control part to be formed is formed.   The said movement control part is formed in the internal peripheral surface of the said annular cover, and is formed of the engagement protrusion part engaged with the engagement recessed part formed in the outer peripheral surface of the said connection cylinder part. The joint member according to the description. The depth of the circumferential groove is larger than the radial thickness of the clip,
The engaging recess is formed by the circumferential groove,
The engagement protrusion restricts movement of the annular cover in a direction away from the tube body by contacting a portion of the inner surface of the circumferential groove facing the tube body and exposed to the outside of the clip. The joint member according to claim 2. The receiving recess is formed by an opening that penetrates the annular cover in a radial direction,
The joint member according to any one of claims 1 to 3, wherein the claw portion is configured to be visible from the outside through the opening. The annular cover is provided with a notch that opens at an edge facing the tubular body,
When the movement restricting portion is engaged with the connecting tube portion or the clip, the portion of the opening edge of the notch that faces the tube is disposed substantially flush with the edge of the clip facing the tube. The joint member according to any one of claims 1 to 4.   The joint member according to claim 4 or 5, wherein the annular cover is colored differently from the clip. A pipe connection structure comprising the joint member according to any one of claims 1 to 6 and the pipe body,
The tube body is fixed to a distal end portion of a drain hose in which an outer side of a hose portion is covered with a heat insulating material, and a distal end portion is inserted into the connection tube portion and a proximal end portion is disposed in the hose portion. A small-diameter cylindrical portion to be inserted, a drain hose abutting portion projecting outward from an intermediate portion of the small-diameter cylindrical portion, and an end of the drain hose being abutted, and the small-diameter cylindrical portion from an outer edge portion of the drain hose abutting portion A pipe connection structure comprising: a large-diameter cylindrical portion that extends to the proximal end side of the tube and sandwiches the hose portion and the heat insulating material between the small-diameter cylindrical portion. The annular cover is formed to be able to abut against the drain hose contact portion,
The pipe connection structure according to claim 7, wherein the movement restricting portion engages with the connecting cylinder portion or the clip when the annular cover is abutted against the drain hose contact portion.