JP2013245744A - Insertion type pipe joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce cost by thinning the diameter direction thickness of a lip packing.SOLUTION: An insertion type pipe joint has a cylindrical joint body 10, a pipe retaining member 14, a collar 16, a lip packing 12 and a coil spring 18. The joint body 10 has a socket 30 and an inner circumferential tapered part 32, and the pipe retaining member 14 is accommodated into the inner circumferential tapered part 32. The collar 16 is accommodated into the joint body 10, and the lip packing 12 is accommodated into the joint body 10. The lip packing 12 sticks to an inner circumferential surface of the joint body 10 and an outer circumferential surface of a connection pipe 200. The coil spring 18 is accommodated into the joint body 10. The coil spring 18 also presses the pipe retaining member 14 to a retaining inner circumferential surface of the inner circumferential tapered part 32. The joint body 10 also has a partition 38, and the partition 38 divides the inner part of the joint body 10 into a section in which the lip packing 12 is accommodated and a section in which the coil spring 18 is accommodated.

Description

  The present invention relates to a plug-in type pipe joint.

  Patent document 1 discloses a plug-in type pipe joint. This plug-in type pipe joint includes a joint body. The joint body has a receiving portion at least at one end. The receiving part receives the end of the connecting pipe. A tapered surface is formed on the inner periphery of the receiving portion. This tapered surface is gradually narrowed toward the upstream side in the connecting pipe insertion direction. In the joint main body, a tube removal preventing member, a collar, an elastic member, an annular spacer, and a lip packing are accommodated in order from the receiving portion toward the inside of the joint main body. The outer diameter portion of the tube removal preventing member is inscribed in the tapered surface. The inner diameter portion of the tube removal preventing member is engaged with the outer peripheral surface of the connection tube. The collar holds the tube stopper. The elastic member presses the tube retaining member together with the collar toward the tapered surface. The spacer holds the end of the elastic member on the downstream side in the connecting pipe insertion direction. The lip packing is in close contact with the outer peripheral surface of the connecting pipe. The lip packing has a ring-shaped portion and a lip portion projecting radially inward from the inner periphery of the ring-shaped portion.

  According to the plug-in type pipe joint disclosed in Patent Document 1, it is possible to improve the sealing performance by the lip packing.

JP 2010-65745 A

  The plug-in type pipe joint disclosed in Patent Document 1 has a problem that the thickness of the lip packing in the diameter direction is too thick. This contributes to an increase in the cost of the plug-in type pipe joint. The present invention has been made to solve this problem. The object is to provide a plug-in pipe joint that can reduce the cost by reducing the thickness of the lip packing in the diameter direction.

  The plug-in type pipe joint of the present invention will be described with reference to the drawings. The reason why the symbols in the figure are used in this column is to help understand the content of the invention. The use of the symbols in the figure in this column is not intended to limit the scope of the invention to the scope shown.

  In order to achieve the above-described object, according to one aspect of the present invention, the plug-in type pipe joint includes a tubular joint body 10, 120, a pipe retaining member 14, a collar 16, a lip packing 12, an elastic member. And a member 18. The joint main bodies 10 and 120 have a receiving portion 30 and an inner peripheral tapered portion 32. The end of the connecting pipe 200 is inserted into the receiving part 30. The inner peripheral tapered portion 32 is continuous with the receiving portion 30. The inner circumferential taper portion 32 has a retaining inner circumferential surface 64. The inner circumferential surface 64 for prevention is narrowed as it approaches the receiving port 30. The end portion of the connecting pipe 200 inserted through the inner peripheral tapered portion 32 into the receiving portion 30 passes therethrough. The tube removal preventing member 14 is accommodated in the inner peripheral tapered portion 32. The tube removal preventing member 14 contacts the outer peripheral surface of the connection tube 200. The collar 16 is accommodated in the joint bodies 10 and 120. The collar 16 holds the tube removal preventing member 14. The lip packing 12 is accommodated in the interior of the joint main bodies 10 and 120 at the back of the inner circumferential surface 64 for retaining when viewed from the receiving port 30. The lip packing 12 is in close contact with the inner peripheral surfaces of the joint bodies 10 and 120 and the outer peripheral surface of the connection pipe 200. The elastic member 18 is accommodated in the interior of the joint main bodies 10 and 120 at the back of the inner peripheral surface 64 for retaining when viewed from the receiving port 30. The elastic member 18 presses the tube retaining member 14 against the retaining inner peripheral surface 64. The joint main bodies 10 and 120 further have partition portions 38 and 138. The partition portions 38 and 138 partition the inside of the joint bodies 10 and 120 into a section in which the lip packing 12 is accommodated and a section in which the elastic member 18 is accommodated.

  The thickness of the lip packing 12 in the diameter direction is increased because the inner diameters of the joint bodies 10 and 120 are increased. Since the lip packing 12 is in close contact with the inner peripheral surfaces of the joint bodies 10 and 120 and the outer peripheral surface of the connecting pipe 200, the lip packing 12 must be thickened in the diameter direction when the inner diameter of the joint main bodies 10 and 120 is increased. I will have to. The reason why the inner diameters of the joint bodies 10 and 120 are increased is that there are members that are accommodated in the joint bodies 10 and 120 and arranged on the outer periphery of the connection pipe 200. In order to secure a storage space for such a member, it is necessary to increase the inner diameter of the joint body 10, 120. When the joint bodies 10 and 120 have the partition portions 38 and 138, the elastic member 18 does not enter the section of the joint bodies 10 and 120 in which the lip packing 12 is accommodated. Since the elastic member 18 does not enter, it is not necessary to increase the inner diameter of the section in which the lip packing 12 is accommodated in case the elastic member 18 enters. Thereby, even if the inner diameter of the section in which the lip packing 12 is accommodated in the joint bodies 10 and 120 is reduced (and the lip packing 12 is reduced in thickness in the diameter direction), the lip packing 12 exhibits its function. it can. Since the function can be exhibited, the cost can be reduced by reducing the thickness of the lip packing 12 in the diameter direction.

  Moreover, it is desirable that the partition part 38 described above includes the protruding part 50 and the holding part 52. The protruding part 50 protrudes from the inner part of the joint body 10 from the inner part of the inner peripheral taper part 32 when viewed from the receiving part 30. The holding part 52 protrudes from the protruding part 50 toward the receiving part 30. The holding part 52 holds the elastic member 18.

  When the partition portion 38 has the holding portion 52 in addition to the protruding portion 50, it is not necessary to house a component for holding the elastic member 18 inside the joint body 10. Since such a necessity is not necessary, in addition to reducing the thickness of the lip packing 12 in the diameter direction, the cost can be reduced by reducing the number of parts.

  Alternatively, the elastic member 18 described above preferably has a coil spring. In this case, the holding part 52 has a plurality of support claws 70. The plurality of support claws 70 are arranged in a ring.

  The plurality of support claws 70 are inserted into the coil spring. Thereby, the coil spring is held by the support claw 70. By arranging the plurality of support claws 70 to be arranged in a ring shape, the coil spring can be prevented from moving in the diameter direction.

  Alternatively, it is desirable that the above-described plug-type pipe joint further includes a scratch prevention sleeve 20. The scratch prevention sleeve 20 is fitted to the inner peripheral portion of the lip packing 12. The end of the connecting pipe 200 is inserted into the scratch preventing sleeve 20. The flaw prevention sleeve 20 is pushed out from the lip packing 12 by being pushed out by the end of the connecting pipe 200 as the connecting pipe 200 is inserted to a predetermined length. In this case, the scratch preventing sleeve 20 has a cylindrical portion 90 and a tube cover portion 92. The cylindrical portion 90 is fitted on the inner peripheral portion of the lip packing 12. The tube cover portion 92 continues to the tube portion 90. The tube cover portion 92 is formed with an inner diameter larger than the outer diameter of the connection tube 200. The end of the connection pipe 200 is inserted into the pipe cover part 92. The tube cover portion 92 has a through portion 100 and an end portion 102. The through portion 100 is continuous with the cylindrical portion 90. The penetration part 100 penetrates between the plurality of support claws 70. The end portion 102 continues to the penetrating portion 100. The end portion 102 extends in the outer direction of the tube cover portion 92. The end portion 102 is sandwiched between the protruding portion 50 and the elastic member 18.

  When the penetrating portion 100 penetrates between the plurality of support claws 70 and the end portion 102 spreads outward in the tube cover portion 92, the end of the connecting tube 200 is smoothly inserted into the scratch preventing sleeve 20. When the end of the connecting pipe 200 is smoothly inserted into the scratch preventing sleeve 20, the inner peripheral portion of the lip packing 12 is prevented from being damaged by the end of the connecting pipe 200 when the connecting pipe 200 penetrates the lip packing 12. it can. Since it can prevent that the inner peripheral part of the lip packing 12 is damaged, the fall of the sealing function of the lip packing 12 by that can be prevented.

  According to the present invention, the cost can be reduced by reducing the thickness of the lip packing in the diameter direction.

It is a figure of the plug-in type pipe joint concerning a 1st embodiment of the present invention. It is a figure of the joint main part concerning a 1st embodiment of the present invention. It is AA sectional drawing of FIG. It is a figure of the damage prevention sleeve concerning a 1st embodiment of the present invention. It is a figure which shows an example of a raw material. It is a figure which shows the condition in the middle of the connection pipe being inserted in the insertion type pipe joint concerning 1st Embodiment of this invention. It is a figure which shows the condition after a connection pipe is inserted in the insertion type pipe joint concerning 1st Embodiment of this invention. It is a figure of the plug-in type pipe joint concerning a 2nd embodiment of the present invention. It is a figure of the joint main part concerning a 2nd embodiment of the present invention. It is BB sectional drawing of FIG. It is a figure of the spacer concerning a 2nd embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same parts are denoted by the same reference numerals. Their names and functions are also the same. Therefore, detailed description thereof will not be repeated.

<First Embodiment>
[Description of structure]
FIG. 1 is a diagram of an insertion-type pipe joint according to the present embodiment. In FIG. 1, the plug-in type pipe joint according to the present embodiment is shown with a part thereof cut away. Based on FIG. 1, the structure of the plug-in type pipe joint concerning this embodiment is demonstrated. The plug-in type pipe joint according to the present embodiment includes a joint body 10, a lip packing 12, a plurality of pipe stopper members 14, a collar 16, a coil spring 18, a flaw prevention sleeve 20, and a collar stopper member 22. Is provided.

  An end of a known connecting pipe 200 is inserted into the joint body 10. The joint body 10 is cylindrical. The lip packing 12 is in close contact with the outer peripheral surface of the connecting pipe 200. The lip packing 12 has a ring-shaped portion and a lip portion that protrudes radially inward from the inner periphery of the ring-shaped portion. The lip portion is in direct contact with the outer peripheral surface of the connection pipe 200. This prevents fluid from leaking from between the outer peripheral surface of the connecting pipe 200 and the lip packing 12. The tube removal preventing member 14 contacts the outer peripheral surface of the connection tube 200. A plurality (two in this embodiment) of engaging teeth are provided on the surface of each tube retaining member 14 that faces the connecting tube 200. The collar 16 is formed of a general-purpose engineering plastic such as crosslinked polyethylene or a special engineering plastic such as PPS (polyphenylene sulfide) having excellent heat resistance. The shape of the collar 16 is cylindrical. The collar 16 is provided with a plurality of holes (the same number as that of the tube stoppers 14). These holes are arranged at predetermined intervals in the circumferential direction of the collar 16. The tube retaining member 14 is fitted in these holes. Thereby, the tube stopper 14 is held by the collar 16. The coil spring 18 presses the tube retaining member 14 together with the collar 16 against the inner peripheral surface of the joint body 10 (the inner peripheral surface of an inner peripheral tapered portion 32 described later).

  FIG. 2 is a diagram of the joint body 10 according to the present embodiment. In FIG. 2, the joint body 10 is shown in a state where a part thereof is cut away. Based on FIG. 2, the structure of the coupling main body 10 concerning this embodiment is demonstrated.

  The joint body 10 includes a receiving portion 30, an inner peripheral tapered portion 32, a collar moving portion 34, a spring accommodating portion 36, a partition portion 38, a lip packing accommodating portion 40, a sleeve accommodating portion 42, and a connecting portion. 44.

  The end of the connection pipe 200 is inserted into the receiving part 30. A fixing groove 60 is provided on the inner peripheral surface of the receiving portion 30. The outer peripheral portion of the collar retaining member 22 is fitted into the fixing groove 60.

  The inner peripheral tapered portion 32 is continuous with the receiving portion 30. The inner circumferential taper portion 32 has a retaining inner circumferential surface 64. The inner circumferential surface 64 for prevention is narrowed as it approaches the receiving port 30. The end of the connecting pipe 200 passes through the inner peripheral tapered portion 32. The connecting pipe 200 is inserted into the receiving port 30. The pipe retaining member 14 described above is accommodated in the inner peripheral tapered portion 32 in the interior of the joint body 10.

  The collar moving part 34 is provided behind the inner peripheral tapered part 32 when viewed from the receiving part 30. The collar 16 described above is accommodated in a section extending from the inner peripheral tapered portion 32 to the collar moving portion 34 in the inside of the joint body 10. One end of the collar 16 moves in the collar moving part 34 in the direction of the central axis of the joint body 10.

  The spring accommodating portion 36 is provided behind the collar moving portion 34 as viewed from the receiving portion 30. The coil spring 18 described above is accommodated in a section extending from the inner peripheral tapered portion 32 to the spring accommodating portion 36 in the inside of the joint body 10.

  The partition portion 38 is provided between the spring accommodating portion 36 and the lip packing accommodating portion 40 when viewed from the receiving portion 30. The partition portion 38 partitions the inside of the joint body 10 into the spring housing portion 36 and the lip packing housing portion 40.

  The lip packing accommodating part 40 is provided in the back of the partition part 38 when viewed from the receiving part 30. The lip packing 12 described above is accommodated in the lip packing accommodating portion 40 in the joint body 10.

  The sleeve accommodating portion 42 is provided at the back of the lip packing accommodating portion 40 when viewed from the receiving portion 30. When the connecting pipe 200 is inserted into the joint body 10, the scratch preventing sleeve 20 moves. Along with this, the scratch preventing sleeve 20 is accommodated in the sleeve accommodating portion 42.

  The connecting portion 44 is provided at the end of the joint body 10 on the opposite side to the receiving portion 30. In the case of this embodiment, the connection part 44 has a male screw (not shown). This male screw and a known pipe (this pipe is a pipe different from the connecting pipe 200 whose end is inserted into the joint body 10) are engaged with each other, whereby the connecting pipe 200 and the known pipe are connected to this embodiment. It will be connected via the plug-in type pipe joint concerning.

  FIG. 3 is a cross-sectional view taken along the line AA of FIG. Based on FIG. 2 and FIG. 3, the structure of the partition part 38 concerning this embodiment is demonstrated. The partition part 38 has a protruding part 50 and a holding part 52. The protruding portion 50 protrudes from the inner peripheral surface of the joint body 10 between the spring accommodating portion 36 and the lip packing accommodating portion 40 (that is, the inner portion of the inner peripheral tapered portion 32 as viewed from the receiving portion 30). To do. As is apparent from FIG. 3, the shape of the protrusion 50 is annular. The holding part 52 protrudes from the protruding part 50 toward the receiving part 30. The holding part 52 holds the coil spring 18. The holding part 52 has a plurality of support claws 70. As is clear from FIG. 3, the support claws 70 are arranged in a ring.

  FIG. 4 is a view of the scratch preventing sleeve 20. In FIG. 4, the scratch-preventing sleeve 20 is shown with a part thereof cut away. Based on FIG. 4, the structure of the damage prevention sleeve 20 concerning this embodiment is demonstrated. The scratch prevention sleeve 20 has a cylindrical portion 90 and a tube cover portion 92. A concave portion 98 is provided on the outer periphery of the cylindrical portion 90. The inner peripheral portion (more specifically, the lip portion) of the lip packing 12 is fitted into the recess 98. The tube cover portion 92 continues to the tube portion 90. The inner diameter of the tube cover portion 92 (in the case of this embodiment, the diameter of a space surrounded by a through portion 100 described later) is formed larger than the outer diameter of the connection tube 200. The end of the connection pipe 200 is inserted into the pipe cover portion 92.

  The tube cover portion 92 has a plurality (ten in the case of this embodiment) of the through portions 100 and a plurality (ten in the case of this embodiment) of the end portions 102. Each of the penetrating portions 100 is continuous with the cylindrical portion 90. The through portion 100 is arranged in an annular shape. The penetration part 100 penetrates between the support claws 70. Each of the end portions 102 is connected to one of the through portions 100. The end portion 102 extends in the outer direction of the tube cover portion 92.

[Description of manufacturing method]
The joint body 10 according to the present embodiment is manufactured by the following procedure. First, the manufacturer manufactures the raw material 110. In the case of this embodiment, the raw material 110 is manufactured by casting (for example, lost wax method). FIG. 5 is a view showing the base material 110. In FIG. 5, the base material 110 is shown in a state where a part thereof is cut away. When the raw material 110 is completed, the manufacturer cuts the inner peripheral surface of the raw material 110 by cutting. As a result, the receiving portion 30, the inner peripheral tapered portion 32, the collar moving portion 34, the spring accommodating portion 36, the lip packing accommodating portion 40, and the sleeve accommodating portion 42 are formed on the inner peripheral surface of the base material 110. . When these are formed, the joint body 10 is completed.

  In addition, since the manufacturing method of components other than the coupling main body 10 is well-known among the plug-in type pipe joints concerning this embodiment, the detailed description is not repeated here.

  When each component of the plug-in type pipe joint according to the present embodiment is manufactured, the manufacturer houses the lip packing 12 in the lip packing housing portion 40 of the joint body 10. When the lip packing 12 is accommodated, the manufacturer accommodates the scratch preventing sleeve 20 in the joint body 10. At this time, the inner peripheral portion of the lip packing 12 is fitted into the recess 98 of the scratch preventing sleeve 20. When the scratch-preventing sleeve 20 is accommodated, the manufacturer accommodates the coil spring 18 in the joint body 10. At that time, the support claw 70 is inserted into the coil spring 18. As a result, the end portion 102 of the scratch preventing sleeve 20 is sandwiched between the protruding portion 50 and the coil spring 18. On the other hand, the manufacturer causes the collar 16 to hold the tube removal preventing member 14. When the tube stopper 14 is held by the collar 16, the manufacturer accommodates the tube stopper 14 and the collar 16 in the joint body 10. When the tube retaining member 14 and the collar 16 are accommodated, the manufacturer fits the outer peripheral portion of the collar retaining member 22 in the fixing groove 60 of the joint body 10. Thereby, the plug-in type pipe joint concerning this embodiment is completed.

[Description of connection method]
FIG. 6 is a diagram illustrating a state in the middle of the connection pipe 200 being inserted into the plug-in type pipe joint according to the present embodiment. In FIG. 6, the plug-in type pipe joint is shown with a part thereof cut away. FIG. 7 is a diagram illustrating a state after the connecting pipe 200 is inserted into the plug-in type pipe joint according to the present embodiment. In FIG. 7, the plug-in type pipe joint is shown with a part thereof cut away. Based on FIG. 1, FIG. 5, and FIG. 6, the connection method of the connection pipe 200 to the insertion-type pipe joint concerning this embodiment is demonstrated.

  The operator inserts the end of the connection pipe 200 from the receiving port 30 of the joint body 10. The distal end of the connection pipe 200 passes through the collar 16. With this penetration, the tube removal preventing member 14 is pushed inward in the joint body 10 (inner direction of the joint body 10 as viewed from the receiving port 30). As the tube retaining member 14 is pushed, the collar 16 is also pushed. As the collar 16 is pushed, the tube stopper 14 is pushed out of the collar 16. The end of the connection pipe 200 penetrating the collar 16 is inserted into the pipe cover portion 92 of the scratch prevention sleeve 20. The end of the connection pipe 200 inserted into the pipe cover part 92 is in contact with one end of the cylinder part 90. FIG. 6 illustrates this situation. The connection pipe 200 that has come into contact with one end of the cylindrical portion 90 pushes the scratch-preventing sleeve 20 into the inside of the joint body 10. Accordingly, the scratch preventing sleeve 20 moves inwardly of the joint body 10. The moved scratch preventing sleeve 20 is accommodated in the sleeve accommodating portion 42 of the joint body 10. The other end of the cylindrical portion 90 abuts against a step in the back of the sleeve accommodating portion 42 (a step formed at a boundary portion between the sleeve accommodating portion 42 and the connecting portion 44). Accordingly, the scratch preventing sleeve 20 is detached from the lip packing 12. Since the scratch preventing sleeve 20 is detached from the lip packing 12, the lip packing 12 is in close contact with the outer peripheral surface of the connecting pipe 200. When the operator tries to pull out the connection pipe 200 under this situation, the pipe stopper 14 moves together with the connection pipe 200. The moved tube retaining member 14 contacts the retaining inner peripheral surface 64 of the inner peripheral tapered portion 32. The tube retaining member 14 in contact with the retaining inner peripheral surface 64 bites into the outer peripheral surface of the connecting tube 200. Thereby, the connection pipe 200 cannot be removed from the plug-in type pipe joint according to the present embodiment. FIG. 7 illustrates this situation. Thereby, the connection of the plug-in type pipe joint concerning this embodiment and the connecting pipe 200 is completed.

[Effect of plug-in type pipe joint according to this embodiment]
As described above, according to the plug-in type pipe joint according to the present embodiment, by providing the partition portion 38, the coil spring 18 is moved to the section of the joint body 10 in which the lip packing 12 is accommodated. It will not enter. On the contrary, the lip packing 12 does not enter the spring accommodating portion 36. Thereby, even if the inner diameter of the section of the joint body 10 in which the lip packing 12 is accommodated is reduced (and the thickness of the lip packing 12 in the diameter direction is reduced), the lip packing 12 can exhibit its function. Since the function can be exhibited, the cost can be reduced by reducing the thickness of the lip packing 12 in the diameter direction.

  If the partition portion 38 has the holding portion 52 in addition to the protruding portion 50, it is not necessary to house a part for holding the coil spring 18 in the joint body 10. Since such a necessity is not necessary, in addition to reducing the thickness of the lip packing 12 in the diameter direction, the cost can be reduced by reducing the number of parts.

  When the plurality of support claws 70 are inserted into the coil spring 18, the coil spring 18 is held by the support claws 70. Since the plurality of support claws 70 are arranged in a ring shape, the coil spring 18 can be prevented from moving in the diameter direction.

  When the penetrating portion 100 penetrates between the plurality of support claws 70 and the end portion 102 spreads outward in the tube cover portion 92, the end of the connecting tube 200 is smoothly inserted into the scratch preventing sleeve 20. When the end of the connecting pipe 200 is smoothly inserted into the scratch preventing sleeve 20, the inner peripheral portion of the lip packing 12 is prevented from being damaged by the end of the connecting pipe 200 when the connecting pipe 200 penetrates the lip packing 12. it can. Since it can prevent that the inner peripheral part of the lip packing 12 is damaged, the fall of the sealing function of the lip packing 12 by that can be prevented.

Second Embodiment
[Description of structure]
FIG. 8 is a view of the plug-in type pipe joint according to the present embodiment. In FIG. 8, the plug-in type pipe joint according to the present embodiment is shown in a state where a part thereof is cut away. Based on FIG. 8, the structure of the plug-in type pipe joint concerning this embodiment is demonstrated. The plug-in type pipe joint according to this embodiment includes a joint main body 120, a lip packing 12, a pipe retaining member 14, a collar 16, a coil spring 18, a scratch preventing sleeve 20, a collar retaining member 22, and a spacer. 124.

  The end of the connecting pipe 200 is inserted into the joint main body 120. The joint main body 120 is cylindrical. The spacer 124 holds the coil spring 18.

  FIG. 9 is a diagram of the joint body 120 according to the present embodiment. In FIG. 9, the joint main body 120 is shown in a state where a part thereof is cut away. Based on FIG. 9, the structure of the coupling main body 120 concerning this embodiment is demonstrated. The joint main body 120 according to the present embodiment includes a receiving portion 30, an inner peripheral tapered portion 32, a collar moving portion 34, a spring accommodating portion 36, a partition portion 138, a lip packing accommodating portion 40, and a sleeve accommodating portion. 42 and a connecting portion 44.

  10 is a cross-sectional view taken along line BB in FIG. Based on FIG. 9 and FIG. 10, the structure of the partition part 138 concerning this embodiment is demonstrated. The partition portion 138 is provided between the spring accommodating portion 36 and the lip packing accommodating portion 40 when viewed from the receiving portion 30. The partition portion 138 partitions the inside of the joint main body 120 into the spring housing portion 36 and the lip packing housing portion 40. The partition part 138 includes a protrusion 150 and an inner peripheral protrusion 170. The projecting portion 150 projects from the inner peripheral surface of the joint main body 120 between the spring accommodating portion 36 and the lip packing accommodating portion 40 (that is, at the back of the inner peripheral tapered portion 32 when viewed from the receiving portion 30). To do. As is apparent from FIG. 10, the shape of the protrusion 150 is annular. The inner peripheral protrusion 170 protrudes from the protrusion 150. As is clear from FIG. 10, the inner peripheral protrusions 170 are arranged in a ring. The penetration part 100 of the scratch prevention sleeve 20 penetrates the gap between the inner peripheral projections 170.

  FIG. 11 is a diagram of the spacer 124 according to the present embodiment. In FIG. 11, the spacer 124 is shown with a part thereof cut away. The spacer 124 according to the present embodiment will be described based on FIG. The spacer 124 includes an insertion portion 180 and a support portion 182. The insertion portion 180 is inserted into the coil spring 18. As a result, the coil spring 18 is held by the spacer 124. The support portion 182 applies a reaction force to the coil spring 18.

[Description of manufacturing method]
In the manufacturing method of the plug-in type pipe joint according to the present embodiment, the coil spring 18 is housed after the spacer 124 is housed in the joint body 120, and the insertion portion 180 is inserted into one end of the coil spring 18. Except this, it is the same as the manufacturing method of the plug-in type pipe joint according to the first embodiment. Therefore, detailed description thereof will not be repeated here.

[Description of connection method]
The connection method of the connection pipe 200 to the plug-in type pipe joint according to the present embodiment is the same as the connection method of the connection pipe 200 to the plug-in type pipe joint according to the first embodiment. Therefore, detailed description thereof will not be repeated here.

[Effect of plug-in type pipe joint according to this embodiment]
As described above, according to the plug-in type pipe joint according to the present embodiment, the cost can be reduced by reducing the thickness of the lip packing 12 in the diameter direction, similarly to the plug-in type pipe joint according to the first embodiment. Can be lowered.

<Description of modification>
The embodiments disclosed herein are illustrative in all respects. The scope of the present invention is not limited based on the above-described embodiment, and various design changes may be made without departing from the spirit of the present invention.

  For example, the plug-in type pipe joint described above may include another elastic member instead of the coil spring 18 described above. Moreover, the structure of the connection part 44 is not specifically limited. The joint body described above may have a connection portion provided with a known female screw instead of the connection portion 44 provided with a male screw. The joint body described above may have a connection portion that can be connected to a known pipe and has a structure that is neither a male screw nor a female screw. Further, the tube removal preventing member 14 is not limited to one that bites into the outer peripheral surface of the connection tube 200. The tube retaining member 14 contacts the outer peripheral surface of the connecting pipe 200 so that a frictional force that does not cause the connecting pipe 200 to come off from the joint bodies 10 and 120 is generated between the connecting pipe 200 and the outer peripheral surface. It may be. Moreover, the structure of a partition part is not limited to what was mentioned above. For example, the partition part according to the second embodiment may not have the inner peripheral protrusion 170.

10, 120: Joint main body 12: Lip packing 14: Tube removal prevention member 16: Collar 20: Scratch prevention sleeve 22: Collar removal prevention member 30: Receiving part 32: Inner peripheral taper part 34: Collar moving part 36: Housing part 38, 138: Partition 40: Lip packing housing 42: Sleeve housing 44: Connection 50, 150: Projection 52: Holding part 60: Fixing groove 64: Inner peripheral surface 70 for removal: Support claw 90: Tube 92: Tube cover part 98: Concave part 100: Through part 102: End part 110: Shaped material 124: Spacer 170: Inner peripheral projection 180: Insertion part 182: Support part 200: Connection pipe

Claims (4)

An end portion of the connecting pipe inserted into the receiving portion having a receiving portion into which an end portion of the connecting tube is inserted and an inner peripheral surface for connection that is connected to the receiving portion and narrows as it approaches the receiving portion. A tubular joint body having an inner circumferential taper portion through which
A tube retaining member that is accommodated in the inner circumferential tapered portion and contacts the outer circumferential surface of the connection tube;
A collar that is housed inside the joint body and holds the pipe retaining member;
A lip packing that is housed in the inner surface of the retaining body and is in close contact with the inner peripheral surface of the joint body and the outer peripheral surface of the connecting pipe as seen from the receiving portion in the interior of the joint body;
A plug-in tube that includes an elastic member that is housed in the interior of the inner surface for retaining as viewed from the receiving portion of the inside of the joint body and presses the tube retaining member against the inner surface for retaining. In the joint,
The plug-in pipe joint according to claim 1, wherein the joint body further includes a partition portion that partitions the interior of the joint body into a section in which the lip packing is accommodated and a section in which the elastic member is accommodated. The partition is
A protruding portion that protrudes from the back of the inner peripheral tapered portion as seen from the receiving portion in the interior of the joint main body,
The plug-in type pipe joint according to claim 1, further comprising a holding portion that protrudes from the protruding portion toward the receiving portion and holds the elastic member. The elastic member has a coil spring;
The plug-in type pipe joint according to claim 2, wherein the holding portion has a plurality of support claws arranged in a ring shape. The plug-in pipe fitting is fitted into the inner periphery of the lip packing, the end of the connection pipe is inserted, and the end of the connection pipe is pushed out as the connection pipe is inserted to a predetermined length. Further comprising a scratch-preventing sleeve that slips out of the lip packing,
The scratch-preventing sleeve,
A cylindrical portion that fits into the inner periphery of the lip packing;
Continuing to the tube portion, and having a tube cover portion into which the inner diameter is formed larger than the outer diameter of the connection tube and the end of the connection tube is inserted,
The tube cover part is
A penetrating portion connected to the cylindrical portion and penetrating between the plurality of support claws;
The plug-in type pipe joint according to claim 3, further comprising an end portion that is connected to the penetrating portion and extends in an outer direction of the tube cover portion and is sandwiched between the protruding portion and the elastic member.

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