JP2019065918A - Pipe joint - Google Patents

Abstract

To reduce the number of components for executing a connection of a corrugated pipe.SOLUTION: The present invention relates to a pipe joint comprising: a joint body with which an inner hole to insert a corrugated pipe therein is formed; a movable piece and an elastic member which are disposed in the inner hole; a holding member which holds the elastic member; and a seal member which is pressed in an axial direction by the elastic member, thereby being fitted to the corrugated pipe. The holding member includes: an annular part; multiple engage parts protruding from the annular part in a direction toward an axial line of the annular part; and multiple guide parts each including a first protrusion protruding from the annular part in an insertion direction, and a second protrusion overlapped with a distal end of the first protrusion and protruding in a direction away from the axial line. The movable piece is held between the multiple guide parts in a movable state in the insertion direction. The elastic member is held by the holding member while being sandwiched in a state where the elastic member is compressed in an axial direction by the second protrusions in the multiple guide parts holding the movable piece and the annular part.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a pipe joint.

  Among the pipe joints to which the corrugated pipe is connected, there is one in which the corrugated pipe is connected by inserting the corrugated pipe inside the pipe joint. In the pipe joint of Patent Document 1, when the corrugated pipe is inserted into the inner hole of the joint body, the elastic member released from the compressed state by the holding means extends and presses the seal member, and the seal member is the periphery of the corrugated pipe. The corrugated pipe is connected by fitting to the surface and the retainer engaging with the corrugated pipe.

JP, 2010-53975, A

  However, the pipe joint of Patent Document 1 has a problem that the structure is complicated and the manufacturing cost is high because the number of parts for connecting the corrugated pipe is large. In order to solve such a subject, the technique which can reduce the number of parts which perform connection of a corrugated pipe was desired.

  The present invention has been made to solve at least a part of the above-mentioned problems, and can be realized as the following modes.

  (1) According to one aspect of the present invention, a pipe joint is provided. This pipe joint has a joint body in which a bored hole is formed in which a corrugated pipe having a circumferential surface in which a peak portion projecting in the outer diameter direction and a valley portion recessed in the inner diameter direction alternately repeat along the axial direction is formed A moving piece disposed in the inner hole, an elastic member disposed in the inner hole, a holding member disposed in the inner hole for holding the elastic member, and the holding member in the inner hole A sealing member which is disposed on the side opposite to the insertion direction of the corrugated pipe from the position where it is inserted, and which is fitted into the valley by being pressed by the elastic member along the axial direction; The member includes an annular portion forming a through hole through which the inserted corrugated tube is passed, a plurality of engaging portions projecting in a direction from the annular portion toward the axis of the annular portion, and the insertion direction from the annular portion And the first protrusion projecting along the And a plurality of guide portions having a second protrusion which is continuous with the tip of the portion and protrudes in the direction away from the axis, and the moving piece is movable in the insertion direction and the plurality of guides And held by the holding member. According to this aspect, compared with a pipe joint having a holding member without a plurality of engaging portions and a plurality of engaging portions as separate parts independent from the holding member, the number of parts for connecting the corrugated pipe can be increased. It can be reduced. Therefore, the complication of the connection structure of the corrugated tube and the increase in the manufacturing cost can be suppressed.

  (2) In the pipe joint according to the above aspect, the seal member may have a portion protruding toward the valley portion. According to this aspect, since the seal member can easily enter the valley portion, the fitting of the valley portion by the seal member can be further strengthened.

  (3) In the pipe joint according to the above aspect, the circumferential surface of the end of the corrugated pipe is located at the bottom of the valley, and the moving piece is compressed from the first position by being pushed by the corrugated pipe. To the second position for releasing the locked state, the first position being the first position where the tips of the plurality of engaging portions are counted from the end when the corrugated tube is inserted into the inner hole The moving piece may be moved to the second position between the top of the peak and the bottom of the next valley. According to this configuration, the corrugated pipe is inserted into the inner hole until the tips of the plurality of engaging portions exceed the top of the first peak portion, whereby the corrugated pipe can be connected by the plurality of engaging portions and the seal member Be done.

  (4) In the pipe joint according to the above aspect, the first position is larger than the distance along the insertion direction from the bottom of the valley to the top of the adjacent peak, and the first position is next to the bottom of the valley The distance from the tip of the plurality of engaging portions in the insertion direction may be a distance smaller than the distance along the insertion direction to the bottom of the valley. According to this aspect, the moving piece starts to be pushed when the corrugated pipe is inserted into the inner hole after the tips of the plurality of engaging portions exceed the top of the first peak. Then, the corrugate tube is inserted into the inner hole, and the plurality of engaging portions and the seal member are inserted between the tips of the plurality of engaging portions beyond the top of the first peak and the bottom of the adjacent valley. The connection of the corrugated pipe by means of

  (5) According to another aspect of the present invention, a holding device is provided. This holding device has a joint main body in which an inner hole is formed into which a corrugated pipe having a circumferential surface in which a peak projecting in the outer diameter direction and a valley recessed in the inner diameter direction alternately repeat along the axial direction is inserted A holding device disposed in the inner hole of a pipe joint, comprising: a moving piece, an elastic member, and a holding member for holding the elastic member, the holding member including the corrugated pipe inserted therein An annular portion forming a through hole to be passed, a plurality of engaging portions projecting in a direction toward the axis of the annular portion from the annular portion, and a first projecting from the annular portion along the insertion direction of the corrugated pipe A plurality of guides each having a protrusion and a second protrusion which is continuous with the tip of the first protrusion and protrudes in a direction away from the axis; and the moving piece is movable in the insertion direction Between the plurality of guides in a state of Member is held by the holding member is sandwiched in a compressed state along the axial direction by the second protruding portion and the annular portion of the plurality of guide portion in a state sandwiching the moving piece. According to the pipe joint provided with the holding device of this aspect, the holding member not having the plurality of engaging portions and the pipe joint provided with the holding device having the plurality of engaging portions as separate parts independent from the holding member are compared. Thus, it is possible to reduce the number of parts for performing holding of the corrugated pipe. Moreover, according to the holding device of this aspect, assembling to the joint body can be facilitated as compared with the case where each of the parts constituting the holding device is individually assembled to the inner hole of the joint body.

It is sectional drawing which shows the structure of the pipe joint in 1st Embodiment. It is a perspective view which shows the structure of a holding member. It is a perspective view in the state where a moving piece and an elastic member were combined with a attaching member. It is an explanatory view showing the insertion state where a corrugated pipe was inserted into a pipe joint. It is an explanatory view showing the insertion state where a corrugated pipe was inserted into a pipe joint. It is explanatory drawing which shows the coupling and corrugated pipe which transfered to the completion state. It is explanatory drawing which shows the coupling and corrugated pipe which transfered to the completion state. It is the enlarged view which expanded a part of FIG. It is a perspective view in the state where a moving piece, an elastic member, and a stopper were combined with a holding member. It is sectional drawing which shows the structure of the pipe joint in 2nd Embodiment. It is sectional drawing which shows the structure of the pipe joint in 3rd Embodiment.

A. First embodiment:
A1. Fitting configuration:
FIG. 1 is a partial cross-sectional view showing the configuration of a pipe joint 10 in the first embodiment. XYZ axes orthogonal to one another are illustrated in FIG. The X axis in FIG. 1 is set parallel to an axis A which is an axial center of the pipe joint 10. The XYZ axes in FIG. 1 correspond to the XYZ axes in the other figures. 1, the cross-sectional shape of the pipe joint 10 is illustrated on the upper side of the drawing with respect to the axis A with the axis A as a boundary, and the external shape of the pipe joint 10 is illustrated on the lower side of the drawing. The cross-sectional shape of the pipe joint 10 in FIG. 1 is a cross-sectional shape obtained by cutting the pipe joint 10 at an XZ plane including the axis A.

  The pipe joint 10 is a joint that connects a pipe and a pipe. In the present embodiment, the pipe joint 10 connects the corrugated pipe to another pipe. The pipe joint 10 includes a joint body 100, a holding member 110, a moving piece 120, an elastic member 130, a fireproof packing 135, a seal member 140, a push nut 150, a stop ring 160, and a watertight O-ring 170. , A selectively permeable member 180, and a watertight packing 190.

  The joint main body 100 is a cylindrical metal member. The joint body 100 is formed with an inner hole 103 into which the corrugated pipe is inserted from the −X axial direction side. The corrugated pipe inserted into the joint body 100 is inserted toward the + X axis direction. In the present embodiment, a protruding portion 105 protruding toward the axis A is formed on the inner peripheral surface of the joint main body 100 in which the inner hole 103 is formed. Further, on the outer peripheral surface at the + X axial direction end side of the joint main body 100, a male screw portion 107 for screwing another pipe is formed.

  FIG. 2 is a perspective view showing the configuration of the holding member 110. As shown in FIG. The holding member 110 is disposed in the inner hole 103 and holds the elastic member 130. The holding of the elastic member 130 by the holding member will be described with reference to FIG. The holding member 110 has an annular portion 112, a plurality of engaging portions 114, and a plurality of guiding portions 116.

  The annular portion 112 forms a through hole through which the corrugated pipe inserted in the pipe joint 10 passes. The axis A of the annular portion 112 is the same as the axis A of the fitting 10. The plurality of engaging portions 114 project toward the axis A from the + X axial direction side of the annular portion 112. In the present embodiment, the plurality of engaging portions 114 project from four positions on the annular portion 112. The four positions mentioned above are positions of the annular portion 112 which pass through the axis A and face each other in the direction inclined by plus or minus 45 degrees from the Z-axis direction. The plurality of engaging portions 114 have line-symmetrical shapes with lines along the Y-axis direction and the Z-axis direction passing through the axis A as symmetry axes. The plurality of engaging portions 114 engage with the valleys of the corrugated tube 200 inserted into the inner hole 103.

  The plurality of guide portions 116 are continuous with the first protrusion 117 which protrudes along the X axis direction from the + X axis direction side of the annular portion 112 and protrudes in the direction away from the axis A And a second protrusion 119. In the present embodiment, the plurality of guide portions 116 project from positions of the annular portion 112 facing each other in the Y-axis direction passing through the axis A and the Z-axis direction, that is, a total of four positions. The plurality of guides 116 guide the direction in which an elastic member 130 described later extends.

  FIG. 3 is a perspective view showing a state in which the moving piece 120 and the elastic member 130 are combined with the holding member 110. FIG. As shown in FIGS. 1 and 3, the moving piece 120 is disposed in the inner hole 103 and is sandwiched between the plurality of guide portions 116 so as to be movable in the X-axis direction. In the present embodiment, the moving piece 120 is a member having a shape including an annular portion and a portion projecting from a position facing each other in the Y-axis direction and the Z-axis direction passing the axis A from the annular portion. . The plurality of guide portions 116 in the state in which the moving piece 120 is sandwiched are in a state of being pushed and expanded in the direction away from the axis A by the moving piece 120.

  The elastic member 130 is disposed in the inner hole 103, and is compressed in the X-axis direction by the second projecting portions 119 and the annular portion 112 in the plurality of guides 116 in a state in which the moving piece 120 is sandwiched. The elastic member 130 is a so-called coil spring. As shown in FIG. 1, in a state in which the second protrusion 119 with the movable piece 120 in between is caught by the protruding portion 105, the annular portion 112 and the protruding portion 105 compress the elastic member 130 in the X axis direction. In a state of In the first embodiment, this state in which the elastic member 130 is compressed and sandwiched is referred to as “The elastic member is in the plurality of guide portions in a state in which the moving piece is sandwiched,” in the means for solving the problem. It corresponds to a state in which it is held by the holding member 110 in a state of being compressed along the axial direction by the second projection and the annular portion.

  Returning to FIG. 1, the fireproof packing 135 thermally expands in the event of a fire and fills the space between the joint body 100 and the inserted corrugated pipe. The fireproof packing 135 seals the outer diameter of the corrugated pipe, thereby preventing gas leakage at the time of a fire and expanding the damage.

  The seal member 140 is disposed on the −X axial direction side from the position of the inner hole 103 where the holding member 110 and the fireproof packing 135 are disposed. The seal member 140 is an annular elastic member that seals the outer peripheral surface of the inserted corrugated tube. The outer diameter side of the seal member 140 is set to be larger than the diameter of the inner peripheral surface of the joint main body 100 forming the inner hole 103. The inner diameter side of the seal member 140 is set smaller than the outer diameter of the corrugated tube to be inserted. The seal member 140 is press-fit so as to be in intimate contact with the inner hole 103, and is disposed movably in the X-axis direction along the inner hole 103. The seal member 140 is preferably made of nitrile butadiene rubber (NBR) in consideration of gas resistance, from the necessity of maintaining the seal performance over a long period of time. In the present embodiment, the seal member 140 has a protruding portion 142 protruding in the direction toward the axis A.

  The push nut 150 is a cylindrical metal member having a through hole through which the corrugated pipe inserted in the pipe joint 10 passes. The push nut 150 is partially inserted into the inner hole 103 from the −X axis direction side, and is engaged with the joint body 100 so as to be movable in the X axis direction along the inner hole 103.

  The stop ring 160 is formed of a steel wire formed in a C-shape. The stop ring 160 is inserted into the inner hole 103 together with the push nut 150 in a state in which the stop ring 160 is reduced in diameter and fitted in a groove 152 formed on the outer peripheral surface on the + X axis direction side of the push nut 150. When the position of the push nut 150 where the groove 152 is formed reaches the groove 102 formed on the inner peripheral surface of the joint body 100, the diameter of the stop ring 160 toward the groove 102 causes the joint body 100 to expand. And the push nut 150. Note that before reaching the groove portion 102, although the stop ring 160 temporarily expands in the groove portion 104 formed on the inner peripheral surface of the joint main body 100 on the −X axial direction side from the groove portion 102, the groove portion 102 and the groove portion 104 The stop ring 160 moves from the groove 104 to the groove 102 as the push nut 150 is inserted to the + X axial direction side.

  The watertight O-ring 170 is fitted in a groove formed on the −X-axis direction side from the groove 152 on the outer peripheral surface of the push nut 150. The water-tight O-ring 170 functions to prevent water from entering the inside of the pipe joint 10 from the outside and to make the pipe joint 10 water-tight.

  Permselective member 180 is fitted in a through hole formed on the −X-axis direction side from the groove portion to which watertight O-ring 170 is fitted on the outer peripheral surface of push nut 150. The selectively permeable member 180 is a porous member which transmits gas and does not transmit liquid water. The permselective member 180 is provided in order to allow the leaked gas to permeate and allow an external gas sensor or the like to detect the leaked gas from the corrugated pipe. Such a porous member is preferably a porous body of a polymer such as polyolefin (polyethylene, polypropylene, etc.), polymethyl methacrylate, polystyrene, ethylene vinyl acetate copolymer, polytetrafluoroethylene or the like.

  The watertight packing 190 is fitted in a groove formed on the end of the inner peripheral surface of the push nut 150 in the −X axial direction end. The watertight packing 190 is an annular member having a substantially L-shaped cross-sectional shape. The watertight packing 190 watertightly seals the outer peripheral surface of the corrugated pipe to be inserted and the inner peripheral surface of the push nut 150. The watertight packing 190 is formed of, for example, an olefin-based rubber such as EPDM.

A2. Insertion status:
FIGS. 4 and 5 are explanatory views showing an inserted state in which the corrugated pipe 200 is inserted into the pipe joint 10. The cross-sectional shape of the pipe joint 10 and the corrugated pipe 200 in FIG. 4 is a cross-sectional shape obtained by cutting the pipe joint 10 at the XZ plane including the axis A. The cross-sectional shape of the pipe joint 10 and the corrugated pipe 200 in FIG. 5 is a cross-sectional shape in which the pipe joint 10 is cut at a plane including the axis A and inclined 45 degrees from the XZ plane. The XYZ axes in FIG. 5 are rotated 45 degrees around the X axis as the rotation axis with respect to the XYZ axes in FIG. 4.

  The corrugated pipe 200 has a corrugated peripheral surface in which peak portions projecting in the outer diameter direction and valley portions recessed in the inner diameter direction alternately repeat along the X-axis direction. The corrugated pipe 200 is composed of a corrugated stainless steel tubular member 210 and a resin layer 220 covering the outer peripheral surface of the tubular member 210. Corrugating is a process of forming the circumferential surface of the tubular member into a corrugated shape. The resin layer 220 covers a portion of the outer peripheral surface of the tubular member 210 excluding the end on the + X axial direction end side.

  The inserted state in which the corrugated pipe 200 is inserted into the inner hole 103 will be described. As shown in FIG. 5, a plurality of engaging portions 114 engage with valleys of the corrugated tube 200 inserted into the inner hole 103. Further, as shown in FIG. 4, the moving piece 120 is pushed and moved in the + X axis direction by the tip end portion of the inserted corrugated tube 200 in the + X axis direction, and is separated from the plurality of guiding portions 116. When the moving piece 120 separates from the plurality of guides 116, the second protrusion 119 is released from the state of being pushed and expanded in the direction away from the axis A.

  The second projecting portion 119 is disengaged from the projecting portion 105 by releasing the pushed-out state. At this time, the elastic member 130 is released from the state of being compressed in the X-axis direction by being pinched between the annular portion 112 and the projecting portion 105 and extends. The extending elastic member 130 pushes the seal member 140 along the X-axis direction via the fireproof packing 135 by pushing the annular portion 112.

A3. Completed status:
6 and 7 are explanatory views showing a completed state in which connection of the corrugated pipe 200 to the pipe joint 10 is completed. FIG. 6 shows the fitting 10 and the corrugated pipe 200 shifted from the inserted state of FIG. 4 to the completed state. FIG. 7 shows the fitting 10 and the corrugated pipe 200 shifted from the inserted state of FIG. 5 to the completed state.

  The completed state in which the connection of the corrugated pipe 200 to the pipe joint 10 is completed will be described. Here, the completed state is a state in which the corrugated tube 200 is shifted by pulling the corrugated tube 200 in the −X-axis direction from the inserted state. When transitioning from the inserted state of FIG. 4 to the completed state of FIG. 6, the push nut 150 is moved to the −X axis direction side as the corrugated tube 200 is pulled to the −X axis direction side. At this time, the stop ring 160 which has been expanded in the groove 102 is moved from the groove 102 to the groove 104 along with the movement of the push nut 150 to the −X axial direction side. When the stop ring 160 moves from the groove portion 102 to the groove portion 104, the diameter of the stop ring 160 is once reduced and then moved to the groove portion 104, and then the diameter is increased again. The diameter of the stop ring 160 in the groove portion 104 is increased, so that the joint body 100 and the push nut 150 are fixed again.

  In the completed state, the seal member 140 is sandwiched between the annular portion 112 pushed from the elastic member 130 in the −X axial direction and the push nut 150 which is fixed again to the joint main body 100, thereby forming a corrugated pipe Get into the valley of 200. Further, in the present embodiment, since the seal member 140 has the projecting portion 142, the seal member 140 can easily enter the valley portion of the corrugated pipe 200. For this reason, compared with the seal member which does not have the projecting portion 142, the fitting of the valley by the seal member 140 can be made stronger.

  The indicator 195 is exposed from the fitting body 100 as the insertion state shifts to the completion state. The indicator 195 is a portion colored in a color different from that of the joint body 100 and the push nut 150 in order to confirm that the connection between the pipe joint 10 and the corrugated pipe 200 is completed.

  In the completed state, connection of the corrugated tube 200 by the plurality of engaging portions 114 and the sealing member 140 is realized.

A4. Position of moving piece:
Next, the position at which the moving piece 120 is disposed in the pipe joint 10 will be described. FIG. 8 is an enlarged view of a part of FIG. In FIG. 8, the illustration is partially simplified as compared with FIG. 5 for the convenience of description. In FIG. 8, the position of the moving piece 120 before being pushed and moved by the corrugated tube 200 is illustrated by a broken line. The moving piece 120 before moving is in a state of being sandwiched by a plurality of guide portions 116 (not shown in FIG. 8). In the inserted state (state of FIG. 5) in which the corrugated pipe 200 is inserted into the pipe joint 10, the moving piece 120 is pushed by the inserted corrugated pipe 200 and is moved in the + X axis direction side. At this time, the moving piece 120 separates from the plurality of guide portions 116.

  The circumferential surface of the X axis direction end of the corrugated tube 200 inserted into the pipe joint 10 is located at the bottom of the valley. The bottom of the valley refers to the portion of the valley that is recessed most radially inward. The valley at the + X axial direction end of the corrugated pipe 200 is a valley V1, the adjacent mountain from the valley V1 to the −X axial direction is a mountain M1, and the mountain from M1 to the −X axial direction The valley portion is referred to as a valley portion V2, and the description of FIG. 8 will be made. In the present embodiment, the position of the moving piece 120 before being moved by being pushed by the corrugated pipe 200 is moved until the tips of the plurality of engaging portions 114 pass the peak portion M1 of the corrugated pipe 200 to the + X axis direction side. The pieces 120 do not separate from the plurality of guiding portions 116, and the tips of the plurality of engaging portions 114 pass the ridges M1 of the corrugated tube 200 to the + X axis direction side to the plurality of valleys V2 It is a position where it can move to a position away from the guide portion 116. The position of the moving piece 120 before being pushed and moved by the corrugated pipe 200 corresponds to the “first position” in the means for solving the problem. The position at which the moving piece 120 leaves the plurality of guides 116 corresponds to the “second position” in the means for solving the problem.

  In the present embodiment, the position of the moving piece 120 before moving is a position separated in the + X-axis direction from the tips of the plurality of engaging portions 114 by a distance larger than the half pitch and smaller than one pitch. The half pitch referred to here is a distance represented by a distance HP along the X-axis direction between the valley portion V1 and the peak portion M1. Here, one pitch is a distance along the X-axis direction between the bottom of the valley V1 and the bottom of the valley V2.

  By arranging the moving piece 120 before moving at the position described in FIG. 8, the moving piece 120 is moved between the tips of the plurality of engaging portions 114 passing the peak portion M1 and reaching the valley portion V2. Can move away from the plurality of guides 116. For this reason, the connection of the corrugated pipe 200 by the plurality of engaging portions 114 and the seal member 140 is realized in synchronization. Therefore, even if the corrugated tube 200 is inserted into the inner hole 103, the moving piece 120 does not separate from the plurality of guiding portions 116 and the sealing member 140 can not enter the valley portion of the corrugated tube 200 and the plurality of engaging portions 114 In the state where the corrugated pipe 200 is connected only by engaging with the valley portion of the corrugated pipe 200, or even when the corrugated pipe 200 is inserted into the inner hole 103, the plurality of engaging portions 114 are in the valley portion of the corrugated pipe 200. It becomes possible to prevent the gate pipe 200 from being connected only by the seal member 140 entering the valleys of the corrugated pipe 200 when the moving piece 120 is separated from the plurality of guide portions 116.

  According to the pipe joint 10 of the first embodiment described above, compared to a pipe joint having a holding member without a plurality of engaging portions and a plurality of engaging portions as separate parts independent from the holding member, a corrugated pipe The number of parts for performing 200 connections can be reduced. In other words, with respect to the pipe joint having the engaging portion and the holding member as separate parts, in the pipe joint 10 of the first embodiment, since the holding member 110 also has the engaging portion 114, the engaging part is a separate part There is no need to provide it, and the number of parts can be reduced. Therefore, complication of the connection structure of the corrugated tube 200 can be suppressed. In addition, since it is not necessary to separately provide a space for housing the engaging portion in the joint main body 100, the entire length of the joint main body 100 can be shortened, thereby suppressing an increase in manufacturing cost.

B. Second embodiment:
FIG. 9 is a perspective view showing a holding device in which the moving piece 120, the elastic member 130 and the stopper 133 are combined with the holding member 110 in the structure provided in the pipe joint 10a of the second embodiment. The pipe joint 10a of the second embodiment described later differs from the pipe joint 10 of the first embodiment in that a stopper 133 is provided in addition to the configuration of the pipe joint 10 of the first embodiment. Moreover, the pipe joint 10 a of the second embodiment differs from the pipe joint 10 of the first embodiment in that the pipe joint 10 a of the second embodiment is provided with a joint body 100 a that is a joint body 100 having no projecting portion 105.

  FIG. 10 is a cross-sectional view showing the configuration of the pipe joint 10a in the second embodiment. The fitting body 100 a does not have the projecting portion 105. The stopper 133 is an annular member. The diameter of the stopper 133 is designed to be larger than the diameter of the coil spring which is the elastic member 130. The stopper 133 is sandwiched together with the elastic member 130 between the second projecting portion 119 and the annular portion 112 in the plurality of guiding portions 116 in a state in which the moving piece 120 is sandwiched. The stopper 133 is disposed on the + X axial direction side from the elastic member 130. As shown in FIG. 10, the second protrusion 119 sandwiching the moving piece 120 sandwiches the elastic member 130 in the X-axis direction together with the annular portion 112 via the stopper 133. In the second embodiment, this state in which the elastic member 130 is compressed and sandwiched is referred to as “The elastic member is in the plurality of guide portions in a state in which the moving piece is sandwiched, in the means for solving the problem. It corresponds to a state in which it is held by the holding member 110 in a state of being compressed along the axial direction by the second projection and the annular portion.

  In the pipe joint 10a as well as the pipe joint 10, the corrugated pipe 200 including the plurality of engaging portions 114 and the seal member 140 is triggered when the corrugated pipe 200 is inserted and the moving piece 120 is separated from the plurality of guide portions 116. Retention is realized.

  Also in the pipe joint 10a of the second embodiment described above, as in the pipe joint 10 of the first embodiment, the pipe of the second embodiment is provided for the pipe joint including the engaging portion and the holding member as separate parts. In the joint 10a, since the holding member 110 also has the engaging portion 114, it is not necessary to provide the engaging portion as a separate part, and the number of parts can be reduced. Therefore, complication of the connection structure of the corrugated tube 200 can be suppressed. In addition, since it is not necessary to separately provide a space for housing the engaging portion in the joint main body 100, the entire length of the joint main body 100 can be shortened, thereby suppressing an increase in manufacturing cost.

  Further, according to the holding device illustrated in FIG. 9, assembling to the joint main body 100 a can be facilitated as compared with the case where the respective members constituting the holding device are individually assembled to the inner hole 103 of the joint main body 100 a.

C. Third embodiment:
FIG. 11 is a cross-sectional view showing the configuration of a pipe joint 10b in the third embodiment. The pipe joint 10 b in the third embodiment differs from the pipe joint 10 in the first embodiment in that a plurality of guide portions 116 b are provided instead of the plurality of guide portions 116. The plurality of guiding portions 116 b are the same as the plurality of guiding portions 116 in the first embodiment except that the plurality of guiding portions 116 b are provided with the second protrusion 119 b. Moreover, the pipe joint 10b of 3rd Embodiment differs in the point provided with the joint main body 100a with the pipe joint 10 of 1st Embodiment. The joint body 100a included in the pipe joint 10b is the same as the joint body 100a included in the pipe joint 10a according to the second embodiment.

  The second protrusion 119b is designed to protrude from the first protrusion 117 in a direction away from the axis A and along the Z-axis direction in a state where the plurality of guides 116b sandwich the moving piece 120. There is. As shown in FIG. 11, the second protrusion 119 b sandwiching the moving piece 120 sandwiches the elastic member 130 in the X-axis direction together with the annular portion 112. In the third embodiment, this state in which the elastic member 130 is compressed and sandwiched is referred to as “The elastic member is in the plurality of guide portions in a state in which the moving piece is sandwiched,” in the means for solving the problem. It corresponds to a state in which it is held by the holding member 110 in a state of being compressed along the axial direction by the second projection and the annular portion.

  In the pipe joint 10 b as well, similarly to the pipe joint 10, the corrugated pipe 200 formed by the plurality of engaging portions 114 and the seal member 140 is triggered when the corrugated piece 200 is inserted and the moving piece 120 separates from the plurality of guiding portions 116. Connection is realized.

  Also in the pipe joint 10b of the third embodiment described above, as in the pipe joint 10 of the first embodiment, the pipe of the third embodiment is provided for the pipe joint including the engaging portion and the holding member as separate parts. In the joint 10b, since the holding member 110 also has the engaging portion 114, it is not necessary to provide the engaging portion as a separate part, and the number of parts can be reduced. Therefore, complication of the connection structure of the corrugated tube 200 can be suppressed. In addition, since it is not necessary to separately provide a space for housing the engaging portion in the joint main body 100, the entire length of the joint main body 100 can be shortened, thereby suppressing an increase in manufacturing cost.

  In addition, according to the holding device configured such that the moving piece 120 and the elastic member 130 are combined with the holding member 110 including the plurality of guides 116b illustrated in FIG. 11, each member constituting the holding device is individually coupled body As compared with the case of assembling into the inner hole 103 of 100a, the assembling into the joint body 100a can be facilitated.

D. Other embodiments:
(1) In the pipe joint of each embodiment described above, the seal member 140 has the protruding portion 142 protruding in the direction toward the axis A, but the present invention is not limited to this. For example, the fitting may not have a projecting portion 142 protruding in a direction towards the axis A.

  (2) In the pipe joint 10 of the first embodiment, the position of the moving piece 120 before being moved by being pushed by the corrugated pipe 200 is the position described in FIG. 8, but the present invention is not limited to this. . For example, when the corrugated tube 200 is inserted into the inner hole 103, the tip of the plurality of engaging portions 114 has a position of -X axis from the valley portion V2 before the corrugated tube 200 is pushed and moved by the corrugated tube 200. It may be a position away from the plurality of guides 116 before reaching the valley on the direction side.

  (3) In the pipe joint 10 of the first embodiment, the position of the moving piece 120a is separated from the tips of the plurality of engaging portions 114 in the + X axis direction by a distance larger than a half pitch and smaller than one pitch. Although the position was, the present invention is not limited to this. For example, the position of the moving piece 120a may be a position separated in the + X-axis direction from the tips of the plurality of engaging portions 114 by a distance larger than one pitch.

  (4) In the pipe joint 10 of the first embodiment, the joint body 100 and the push nut 150 are metal members, but the present invention is not limited to this. For example, the joint body 100 and the push nut 150 may be members in which a metal portion and a resin portion are combined.

  (5) In the pipe joint of each embodiment mentioned above, although the fireproof packing 135 was provided, the present invention is not limited to this. For example, the pipe joint may not include the fireproof packing 135. In such a pipe joint, the expanding elastic member 130 directly presses the seal member 140 without the fireproof packing 135 by pushing the annular portion 112.

  The present invention is not limited to the above-described embodiments, examples, and modifications, and can be implemented with various configurations without departing from the scope of the invention. For example, the technical features in the embodiments, examples, and modifications corresponding to the technical features in the respective forms described in the section of the summary of the invention are for solving some or all of the problems described above, or It is possible to replace or combine as appropriate in order to achieve part or all of the above-mentioned effects. Also, if the technical features are not described as essential in the present specification, they can be deleted as appropriate.

DESCRIPTION OF SYMBOLS 10, 10a10b ... Pipe fitting 100, 100a ... Fitting main body 102, 104 ... Groove part 103 ... Inner hole 105 ... Protrusion part 107 ... Male screw part 110 ... Holding member 112 ... Annular part 114 ... Engagement part 116, 116b ... Guide part 117 ... First projection 119, 119b ... Second projection 120, 120a ... Moving piece 130 ... Elastic member 133 ... Stopper 135 ... Fireproof packing 140 ... Sealing member 142 ... Projection portion 150 ... Push nut 152 ... Groove portion 160 ... Stop ring 170 ... Watertight O-ring 180 ... Selectively permeable member 190 ... Watertight packing 195 ... Indicator 200 ... Corrugated pipe 210 ... Tubular member 220 ... Resin layer HP ... Distance M1 ... Peak part V1, V2 ... Valley part

Claims (5)

A joint body having an inner hole in which a corrugated pipe having a circumferential surface in which a ridge projecting in an outer diameter direction and a valley recessed in an inner diameter direction alternately repeat along the axial direction is formed;
A moving piece disposed in the inner hole;
An elastic member disposed in the inner hole;
A holding member disposed in the inner hole and holding the elastic member;
It is arranged on the side opposite to the insertion direction of the corrugated pipe from the position where the holding member is arranged among the inner holes, and is fitted in the valley by being pressed by the elastic member along the axial direction Equipped with a full seal member,
The holding member is
An annular portion forming a through hole through which the inserted corrugated tube passes;
A plurality of engaging portions projecting from the annular portion in a direction toward the axis of the annular portion;
A plurality of guide portions having a first projection projecting from the annular portion along the insertion direction, and a second projection continuing to the tip of the first projection and projecting away from the axis; Have
The moving piece is sandwiched between the plurality of guide portions in a movable state in the insertion direction,
The elastic member is held by the holding member in a state of being compressed along the axial direction by the second projecting portion and the annular portion in the plurality of guiding portions sandwiching the moving piece. , Pipe fittings. The pipe joint according to claim 1, wherein
The pipe joint, wherein the seal member has a portion projecting toward the valley. The pipe joint according to claim 1 or 2, wherein
The circumferential surface of the end of the corrugated tube is located at the bottom of the valley,
The moving piece is moved from the first position to the second position for releasing the compressed state by being pushed by the corrugated pipe,
In the first position, when the corrugated pipe is inserted into the inner hole, the leading end of the plurality of engaging portions is counted from the end and exceeds the top of the first peak portion, and then the next valley The pipe joint, wherein the moving piece can move to the second position while reaching the bottom of the part. The pipe joint according to claim 3, wherein
The first position is greater than the distance along the insertion direction from the bottom of the valley to the top of the adjacent peak, and the insertion from the bottom of the valley to the bottom of the adjacent valley The pipe joint which is a position away from the tip of the plurality of engaging portions in the insertion direction by a distance smaller than the distance along the direction. The above-mentioned pipe joint comprising a joint body having an inner hole formed therein, in which a corrugated pipe having a circumferential surface in which an outwardly projecting peak portion and an inwardly projecting valley portion alternately repeat along the axial direction is inserted A holding device disposed in the inner hole,
With the moving piece,
An elastic member,
And a holding member for holding the elastic member,
The holding member is
An annular portion forming a through hole through which the inserted corrugated tube passes;
A plurality of engaging portions projecting from the annular portion in a direction toward the axis of the annular portion;
A plurality of guiding portions having a first projection projecting from the annular portion along the insertion direction of the corrugated pipe, and a second projection continuing to the tip of the first projection and projecting away from the axis. And
The moving piece is sandwiched between the plurality of guide portions in a movable state in the insertion direction,
The elastic member is held by the holding member in a state of being compressed along the axial direction by the second projecting portion and the annular portion in the plurality of guiding portions sandwiching the moving piece. , Holding device.

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