Pipe joint

Abstract

To suppress the occurrence of backlash.SOLUTION: This pipe joint is provided with a pipe connector 40, a separate connector 42, a sealing material 44, an annular mutual connector 46, and a relative movement limiter 48. The pipe connector 40 has a pipe side space forming part 60, a connector inner peripheral fitting groove forming part 62, and a pipe side overhanging part 64. The connecting body inner peripheral fitting groove forming portion 62 forms a connecting body inner peripheral fitting groove into which a part of the inner peripheral side of the mutual connecting body 46 is fitted. The separate body connection body 42 has a connection body outer periphery fitting groove forming part 80, a separate body side opposing part 82, a sealing material arrangement groove forming part 84, and a connection body inner space forming part. The connecting body outer periphery fitting groove forming portion 80 forms a connecting body outer periphery fitting groove into which a part of the outer periphery side of the mutual connecting body 46 is fitted. The relative movement limiter 48 is disposed between the pipe-side overhanging portion 64 and the separate-side facing portion 82 when the one end of the pipe connector 40 enters the separate connector 42.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to a pipe joint. [Background technology]

[0002] Patent Document 1 discloses a pipe joint. This pipe joint includes a metal connecting body, a metal coupling body, an O-ring, and a fireproof gasket. The connecting body is a cylindrical object. The connecting body is an object that is threadably connected to an object other than the flexible pipe. The coupling body is an object that couples the connecting body to the flexible pipe. The connecting body is rotatable along the surface of the coupling body. The coupling body is connected to the flexible pipe so that its central axis is coaxial with the central axis of one end of the flexible pipe. This allows the connecting body to rotate in a direction along the surface of one end of the flexible pipe. As a result, the coupling body couples the connecting body to the flexible pipe so that it can rotate in a direction along the surface of one end of the flexible pipe. An O-ring is disposed in a gap between the connecting body and the coupling body. The O-ring seals the gap between the connecting body and the coupling body. The fireproof gasket is disposed in a location in the gap between the connecting body and the coupling body different from the O-ring. The fireproof packing seals the gap between the connector and the coupling when the pipe joint is exposed to high temperatures above a predetermined temperature due to a fire or other cause. The pipe joint disclosed in Patent Document 1 can reduce the complexity of the connecting work. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-163829 Summary of the Invention [Problem to be solved by the invention]

[0004] The pipe joint disclosed in Patent Document 1 has a problem in that it is prone to rattle.

[0005] The present invention has been made to solve this problem, and its object is to provide a pipe joint that can suppress the occurrence of rattle. [Means for solving the problem]

[0006] The pipe joint of the present invention will be described with reference to the drawings. The reference numerals in the drawings are used in this section to facilitate understanding of the invention. The use of the reference numerals in the drawings in this section is not intended to limit the invention to the scope shown in the drawings.

[0007] In order to achieve the above-mentioned object, according to one aspect of the present invention, a pipe fitting 12 includes a pipe connecting body 40, a separate-object connecting body 42, a sealing material 44, and an annular interconnecting body 46. The pipe connecting body 40 is a tubular object for connection to the pipe 10. The separate-object connecting body 42 is a tubular object for connection to an object other than the pipe 10. The sealing material 44 seals a gap between the separate-object connecting body 42 and one end of the pipe connecting body 40 that has entered the separate-object connecting body 42. The interconnecting body 46 connects the separate-object connecting body 42 to the pipe connecting body 40. The pipe connecting body 40 has a pipe-side space forming portion 60 and a connector inner circumferential fitting groove forming portion 62. The pipe-side space forming portion 60 forms a pipe-side space. The pipe-side space is a space that is connected to the interior of the pipe. The pipe-side space forming portion 60 is connected to one end of the pipe 10. The connector inner circumferential fitting groove forming portion 62 is formed on the outer periphery of the tube-side space forming portion 60. The connector inner circumferential fitting groove forming portion 62 forms a connector inner circumferential fitting groove. A portion of the inner periphery of the interconnector 46 fits into the connector inner circumferential fitting groove. The separate connector 42 has a connector outer circumferential fitting groove forming portion 80, a sealant placement groove forming portion 84, and a connector inner space forming portion 86. The connector outer circumferential fitting groove forming portion 80 forms the connector outer circumferential fitting groove. A portion of the outer periphery of the interconnector 46 fits into the connector outer circumferential fitting groove. The sealant placement groove forming portion 84 is positioned on the opposite side of the tube 10 from the position of the connector outer circumferential fitting groove forming portion 80. The sealant placement groove forming portion 84 forms a sealant placement groove. A sealant 44 is placed in the sealant placement groove. The connector inner space forming portion 86 is positioned on the opposite side of the tube 10 from the position of the sealant placement groove forming portion 84. The connecting body space forming portion 86 forms the connecting body internal space. The connecting body internal space is a space that continues to the pipe side space. The pipe connector 40 further has a pipe side protruding portion 64. The pipe side protruding portion 64 protrudes from the outer periphery of the pipe side space forming portion 60. The separate part connector 42 further has a separate part side facing portion 82. The separate part side facing portion 82 faces the pipe side protruding portion 64 as one end of the pipe connector 40 enters the separate part connector 42. The pipe fitting 12 further includes a relative movement limiting body 48. The relative movement limiting body 48 is positioned between the pipe side protruding portion 64 and the separate part side facing portion 82 when one end of the pipe connector 40 enters the separate part connector 42.The connector inner peripheral fitting groove, the connector outer peripheral fitting groove, and the sealant placement groove are positioned at a position different from that between the pipe side protrusion portion 64 and the separate body side opposing portion 82 when one end of the pipe connector 40 enters the separate body connector 42.

[0008] The interconnector 46 fits into the connector inner circumferential fitting groove and the connector outer circumferential fitting groove. This connects the separate-item connector 42 to the pipe connector 40. At this time, the pipe connector 40 may be able to move relative to the separate-item connector 42. The sealant 44 seals the gap between the separate-item connector 42 and one end of the pipe connector 40 that has entered the separate-item connector 42, thereby restricting this relative movement. Meanwhile, when one end of the pipe connector 40 enters the separate-item connector 42, a relative movement limiter 48 is disposed between the pipe-side protrusion 64 and the separate-item facing portion 82. This prevents the pipe connector 40 having the pipe-side protrusion 64 and the separate-item connector 42 having the separate-item facing portion 82 from moving relative to each other as viewed from the other side by the relative movement limiter 48. By preventing this relative movement, the occurrence of rattles that may occur due to the relative movement of the pipe connector 40 with respect to the separate connector 42 is suppressed.

[0009] It is also desirable that the above-described relative movement limiting member 48 be elastically deformed by being compressed by the pipe-side protruding portion 64 and the separate-member-side opposing portion 82. This elastic deformation desirably occurs when the interconnector 46 connects the separate-member connector 42 to the pipe connector 40, with a portion of the inner periphery of the interconnector 46 fitting into the connector inner periphery fitting groove and a portion of the outer periphery of the interconnector 46 fitting into the connector outer periphery fitting groove.

[0010] When the relative movement limiter 48 is compressed and elastically deformed by the pipe-side protruding portion 64 and the separate-body-side opposing portion 82, the pipe-side protruding portion 64 and the separate-body-side opposing portion 82 each receive a reaction force from the relative movement limiter 48. At this time, a portion of the inner periphery of the interconnector 46 fits into the inner periphery fitting groove of the interconnector, and a portion of the outer periphery of the interconnector 46 fits into the outer periphery fitting groove of the interconnector, thereby connecting the separate-part connector 42 to the pipe connector 40. In this case, the pipe connector 40 and the separate-part connector 42 are constrained to each other. As a result, rattle caused by relative movement of the pipe connector 40 with respect to the separate-part connector 42 is further suppressed.

[0011] Furthermore, it is desirable that the above-described relative movement limiting body 48 is annular. In this case, it is desirable that the inner peripheral portion 100 of the relative movement limiting body 48 is disposed so as to face the outer periphery of the tube-side space forming portion 60. In this case, it is desirable that the tube-side protruding portion 64 forms an annular plane, which will be described next. This plane faces side surfaces 104, 104 of the relative movement limiting body 48.

[0012] Suppose that the pipe connector 40 moves relative to the separate connector 42 such that the central axis 120 of the pipe connector 40 tilts relative to the central axis 122 of the separate connector 42. In this case, the following force may be applied from the pipe-side protrusion 64 to the relative movement limiter 48. This force tilts the central axis 124 of the relative movement limiter 48 relative to the extension direction of the separate connector 42. Such a force may be applied to the relative movement limiter 48 because the annular inner periphery 100 of the relative movement limiter 48 faces the outer periphery of the pipe-side space forming portion 60, and the annular plane formed by the pipe-side protrusion 64 faces the side surfaces 104, 104 of the relative movement limiter 48. When the relative movement limiter 48 receives a force in the direction that tilts the central axis 124, the pipe-side protrusion 64 receives a reaction force. Because the pipe connector 40 receives the reaction force, it is less likely to tilt than if it were not subjected to the reaction force. Since it is difficult to tilt, the occurrence of rattles due to the relative movement of the pipe connector 40 with respect to the separate connector 42 is suppressed.

[0013] Alternatively, it is desirable that the protrusion height 140 of the annular plane of the pipe side protrusion portion 64 from the point on the outer periphery of the above-mentioned pipe side space forming portion 60 that faces the inner periphery 100 of the relative movement limiting body 48 be greater than the height difference 142 between the inner periphery 100 of the relative movement limiting body 48 and the outer periphery 102 of the relative movement limiting body 48.

[0014] Assume that the above-described annular plane projection height 140 is equal to or greater than the height difference 142 between the inner periphery 100 of the relative movement limiter 48 and the outer periphery 102 of the relative movement limiter 48. In this case, when a force is applied from the pipe-side projection 64 to the relative movement limiter 48 in a direction that tilts the central axis 124 of the relative movement limiter 48 relative to the central axis 122 of the separate part connector 42, the force acts on the outer edge of the relative movement limiter 48. When the force acts on the outer edge of the relative movement limiter 48, a reaction force to the force is applied to a portion of the relative movement limiter 48 that contacts the outer edge. When the reaction force is applied to that portion, the pipe-side projection 64 becomes less likely to tilt. As a result, rattles caused by the relative movement of the pipe connector 40 with respect to the separate part connector 42 are further reduced.

[0015] Alternatively, it is desirable that the relative movement limiter 48 contains expanded graphite. If the relative movement limiter 48 contains expanded graphite, there is a reduced risk of the contents of the pipe 10 leaking from the gap between the pipe connector 40 and the separate-item connector 42, even if the pipe fitting 12 is subjected to high heat due to a fire or other cause.

[0016] Alternatively, the above-described connector inner circumferential fitting groove is preferably disposed on the outer periphery of the pipe-side space forming portion 60, on the pipe 10 side as viewed from the position of the pipe-side protruding portion 64. In this case, the connector outer circumferential fitting groove is preferably disposed on the pipe 10 side as viewed from the position of the separate-body side facing portion 82. In this case, the sealant disposition groove is preferably disposed on the opposite side of the pipe 10 as viewed from the position of the separate-body side facing portion 82. As a result, a relative movement limiter 48 is disposed between the sealant 44 and the interconnector 46. When the relative movement limiter 48 is disposed between the sealant 44 and the interconnector 46, the distance between the sealant 44 and the interconnector 46 is greater than when the relative movement limiter 48 is not disposed between the sealant 44 and the interconnector 46. When this distance is greater, it is easier to suppress relative movement of the pipe connector 40 with respect to the separate-body connector 42, such that the central axis 120 of the pipe connector 40 is inclined with respect to the central axis 122 of the separate-body connector 42, compared to when this distance is not large. As a result, the occurrence of rattles due to the relative movement of the pipe connector 40 with respect to the separate connector 42 is further suppressed. [Effects of the Invention]

[0017] The pipe joint according to the present invention can suppress the occurrence of rattle. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is an external view of a pipe joint according to an embodiment of the present invention. [Figure 2] 1 is an external view of a tube connector according to an embodiment of the present invention. [Figure 3] 1 is an external view of a separate object connector according to an embodiment of the present invention. [Figure 4] 1 is an external view of a relative movement limiter according to an embodiment of the present invention. [Figure 5] 10 is a cross-sectional view of a pipe joint according to an embodiment of the present invention when a relative movement limiting body faces a separate body-side facing portion. FIG. [Figure 6] 1 is a conceptual diagram illustrating the rattle suppression function of a pipe joint according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0019] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the following description, the same components are denoted by the same reference numerals. The names and functions of the components are also the same. Therefore, detailed description thereof will not be repeated.

[0020] Fitting Configuration 1 is an external view of a pipe fitting 12 according to this embodiment. The pipe fitting 12 according to this embodiment will be described below with reference to FIG.

[0021] The pipe joint 12 according to this embodiment is used to connect one end of a flexible pipe 10 to another object (not shown). An example of the other object is a gas appliance. The pipe joint 12 includes a metal pipe connector 40, a metal connector 42, a sealant 44, an interconnector 46, and a relative movement limiter 48. A well-known nipple 14 is connected to the other end of the flexible pipe 10 shown in FIG. 1.

[0022] The pipe connector 40 is a cylindrical object. The pipe connector 40 is an object to be connected to the pipe 10. The specific configuration of the pipe connector 40 will be described later.

[0023] The separate object connector 42 is a cylindrical object for connecting to the separate object described above. The specific configuration of the pipe connector 40 will also be described later.

[0024] The sealant 44 is disposed in the gap between the tube connector 40 and one end of the tube connector 40 that has entered the separate connector 42. The sealant 44 seals the gap. The sealant 44 in this embodiment is an annular object made of elastomer. Such objects are well known, so detailed descriptions thereof will not be repeated here.

[0025] The interconnector 46 is a metal, annular object with a portion cut out. In this embodiment, the interconnector 46 connects the separate-item connector 42 to the pipe connector 40 so that the pipe connector 40 is rotatable along the surface of the separate-item connector 42. The interconnector 46 connects the separate-item connector 42 to the pipe connector 40 so as to restrict movement of the pipe connector 40 in a direction along the central axis 122 of the separate-item connector 42. A specific form in which the interconnector 46 connects the separate-item connector 42 to the pipe connector 40 will be described later.

[0026] The relative movement limiter 48 is disposed between the outer periphery of one end of the pipe connector 40 and the inner periphery of the separate-item connector 42. In this embodiment, the relative movement limiter 48 is annular in shape. In this embodiment, the relative movement limiter 48 is made of a synthetic resin containing expanded graphite. The relative movement limiter 48 of this embodiment has a higher elastic modulus than the sealing material 44. However, the relative movement limiter 48 of this embodiment is capable of some elastic deformation. In addition, because it contains expanded graphite, the relative movement limiter 48 of this embodiment seals the gap between the one end of the pipe connector 40 and the separate-item connector 42 when the pipe fitting 12 of this embodiment is subjected to high heat of a predetermined temperature or higher due to a fire or other cause.

[0027] Fig. 2 is an external view of a pipe connector 40 according to this embodiment. In Fig. 2, the objects shown are shown with portions cut away. The configuration of the pipe connector 40 according to this embodiment will be described below with reference to Fig. 2. As shown in Fig. 2, the pipe connector 40 has a pipe-side space-forming portion 60, a connector-internal circumferential fitting groove-forming portion 62, and a pipe-side protruding portion 64.

[0028] The tube-side space forming portion 60 forms a tube-side space. The tube-side space is a space that is connected to the interior of the tube 10. The tube-side space forming portion 60 is connected to one end of the tube 10. In this embodiment, the tube-side space forming portion 60 penetrates the relative movement restricting body 48. Accordingly, the inner peripheral portion 100 of the relative movement restricting body 48 is positioned to face the outer periphery of the tube-side space forming portion 60.

[0029] The connector inner circumferential fitting groove forming portion 62 is formed on the outer periphery of the tube-side space forming portion 60. The connector inner circumferential fitting groove forming portion 62 forms a groove into which a portion of the inner periphery of the interconnector 46 fits. In this embodiment, this groove is referred to as the "connector inner circumferential fitting groove."

[0030] The pipe-side protrusion 64 is formed at a position on the outer periphery of the pipe-side space forming portion 60, which will be described below. This position is on the opposite side from the pipe 10 side when viewed from the position of the connector inner circumferential fitting groove forming portion 62. In this embodiment, the pipe-side protrusion 64 forms an annular plane, which will be described below. This plane protrudes from the outer periphery of the pipe-side space forming portion 60, which faces the inner periphery 100 of the relative movement limiting body 48. As a result, the pipe-side protrusion 64 protrudes from the outer periphery of the pipe-side space forming portion 60. The annular plane formed by the pipe-side protrusion 64 faces the pipe 10 side of a pair of annular side surfaces 104, 104, which will be described below, of the relative movement limiting body 48. In addition, in this embodiment, the protrusion height 140 of the annular plane from the point on the outer periphery of the tube side space forming portion 60 where the inner periphery 100 of the relative movement limiting body 48 faces is greater than the height difference 142 between the inner periphery 100 of the relative movement limiting body 48 and the outer periphery 102 of the relative movement limiting body 48.

[0031] Fig. 3 is an external view of a separate-item connector 42 according to this embodiment. In Fig. 3, the illustrated objects are shown with portions cut away. The configuration of the separate-item connector 42 according to this embodiment will be described below with reference to Fig. 3. As shown in Fig. 3, the separate-item connector 42 has a connecting-item outer peripheral fitting groove forming portion 80, a separate-item facing portion 82, a sealant placement groove forming portion 84, and a connecting-item inner space forming portion 86.

[0032] The connector outer peripheral fitting groove forming portion 80 forms a space through which one end of the pipe connector 40 passes. The connector outer peripheral fitting groove forming portion 80 also forms a groove into which a portion of the outer periphery of the interconnector 46 fits. In this embodiment, this groove is referred to as the "connector outer peripheral fitting groove."

[0033] The separate body side facing portion 82 is continuous with the connecting body outer peripheral fitting groove forming portion 80. The separate body side facing portion 82 also forms a space through which one end of the pipe connector 40 passes. In the present embodiment, the separate body side facing portion 82 forms an annular flat surface that faces the outside of the separate body connector 42.

[0034] The sealant placement groove forming portion 84 is positioned on the opposite side of the pipe 10 from the position of the connector outer peripheral fitting groove forming portion 80. The sealant placement groove forming portion 84 also forms a space through which one end of the pipe connector 40 passes. The sealant placement groove forming portion 84 forms a groove in which the sealant 44 is placed. In this embodiment, this groove is referred to as a "sealant placement groove."

[0035] The connector internal space forming portion 86 is positioned on the opposite side of the pipe 10 when viewed from the position of the sealant placement groove forming portion 84. The connector internal space forming portion 86 forms the connector internal space. The connector internal space is a space that communicates with the pipe side space via the spaces formed by the separate body side opposing portion 82 and the sealant placement groove forming portion 84.

[0036] Fig. 4 is an external view of the relative movement limiting body 48 according to this embodiment. The configuration of the relative movement limiting body 48 according to this embodiment will be described below with reference to Fig. 4. As shown in Fig. 4, the relative movement limiting body 48 has an inner circumferential portion 100, an outer circumferential portion 102, and a pair of annular side surfaces 104, 104.

[0037] The inner peripheral portion 100 forms a curved surface that becomes the inner peripheral surface of the relative movement limiting body 48. The outer peripheral portion 102 forms a curved surface that becomes the outer peripheral surface of the relative movement limiting body 48. The annular side surface 104 becomes a side surface when part of the outer peripheral surface formed by the outer peripheral portion 102 is the front surface and another part of that outer peripheral surface is the back surface. In this embodiment, the shape of the annular side surface 104 is an annular flat surface.

[0038] FIG. 5 is a cross-sectional view of the pipe fitting 12 when the relative movement limiter 48 faces the separate-body-side facing portion 82. As is clear from FIG. 5, the relative movement limiter 48 is positioned between the pipe-side protruding portion 64 and the separate-body-side facing portion 82 when one end of the pipe connector 40 enters the separate-body connecting body 42. In this embodiment, the distance between one of the annular side surfaces 104, 104 of the separate-body-side facing portion 82 is slightly wider than the maximum distance described below. This distance is the distance between the pipe-side protruding portion 64 and the separate-body-side facing portion 82 when the interconnector 46 connects the separate-body connecting body 42 to the pipe connector 40 by fitting a portion of the inner peripheral side of the interconnector 46 into the connector inner peripheral fitting groove and a portion of the outer peripheral side of the interconnector 46 into the connector outer peripheral fitting groove. As a result, the relative movement limiter 48 is compressed by the pipe-side protruding portion 64 and the separate-body-side facing portion 82 and elastically deforms. FIG. 5 shows the relative movement limiting body 48 elastically deformed in this manner.

[0039] [How to use pipe fittings] An example of how to use the pipe fitting 12 according to this embodiment will be described below. The pipe fitting 12 according to this embodiment is assembled when connecting to the pipe 10. In this assembly, an operator first connects the pipe 10 to the pipe connector 40 using a well-known method. Note that the method of connecting the pipe 10 to the nipple 14 will not be described here, as it is not directly related to the method of using the pipe fitting 12 according to this embodiment.

[0040] When the pipe 10 and the pipe connector 40 are connected, the operator fits the interconnector 46 into the fitting groove around the periphery of the connector. The operator fits the sealant 44 into the groove formed by the sealant placement groove forming portion 84 of the separate connector 42.

[0041] Next, the worker passes the relative movement restricting body 48 through one end of the pipe connector 40. One of the pair of annular side surfaces 104, 104 of the relative movement restricting body 48 through which one end of the pipe connector 40 passes faces the annular plane formed by the pipe side protrusion 64.

[0042] When one end of the pipe-side space forming portion 60 of the pipe connector 40 penetrates the relative movement limiter 48, the operator inserts one end of the pipe connector 40 together with the relative movement limiter 48 into the separate-part connector 42. Accordingly, one end of the pipe connector 40 and the relative movement limiter 48 pass through the space surrounded by the connector outer periphery fitting groove forming portion 80. Next, the annular plane formed by the relative movement limiter 48 faces one of the pair of annular side surfaces 104, 104 of the separate-part facing portion 82 that is opposite to the pipe 10 side when viewed from the position of the relative movement limiter 48. As a result, the relative movement limiter 48 is positioned between the pipe-side protruding portion 64 and the separate-part facing portion 82 when the one end of the pipe connector 40 enters the separate-part connector 42. In addition, the separate-body-side opposing portion 82 faces the pipe-side protruding portion 64 as one end of the pipe connector 40 enters the separate-body connector 42 .

[0043] At approximately the same time that the relative movement limiter 48 is positioned between the pipe-side protruding portion 64 and the separate-body-side opposing portion 82, the interconnector 46 fitted into the connector inner peripheral fitting groove of the pipe connector 40 reaches the space surrounded by the connector outer peripheral fitting groove forming portion 80. As it reaches, the interconnector 46 fits into the connector outer peripheral fitting groove. This completes the assembly of the pipe fitting 12 according to this embodiment and the connection of the pipe 10 to it. At this time, one end of the pipe-side space forming portion 60, and therefore one end of the pipe connector 40, penetrates the space surrounded by the sealant 44. As a result of this penetration, the sealant 44 seals the gap between one end of the pipe-side space forming portion 60, and therefore one end of the pipe connector 40, and the inner peripheral surface of the separate-body connecting body 42.

[0044] [Explanation of Effects According to This Embodiment] 6 is a conceptual diagram showing the rattle suppression function of the pipe joint 12 according to this embodiment. Based on FIG. 6, the reason why rattle is suppressed in the pipe joint 12 according to this embodiment will be explained as follows.

[0045] The tube connector 40 and the separate-item connector 42 are connected by fitting the interconnector 46 into the connector inner circumferential fitting groove of the tube connector 40 and the connector outer circumferential fitting groove of the separate-item connector 42. This connection allows the tube connector 40 to move relative to the separate-item connector 42. In this embodiment, a gap exists between the connector inner circumferential fitting groove and the interconnector 46 that fits therein. A gap also exists between the connector outer circumferential fitting groove of the separate-item connector 42 and the interconnector 46 that fits therein. The existence of these gaps allows the tube connector 40 to move such that the central axis 120 of the tube connector 40 is inclined relative to the central axis 122 of the separate-item connector 42. The outline of the tube connector 40 after such movement occurs is shown by a two-dot chain line in FIG. 6.

[0046] Meanwhile, when one end of the pipe connector 40 enters the separate-item connector 42, a relative movement limiter 48 is disposed between the pipe-side extension 64 and the separate-item connector 42. This arrangement prevents the relative movement of the pipe connector 40 having the pipe-side extension 64 and the separate-item connector 42 having the separate-item connector 82 relative to each other. In FIG. 6 , the outline of the pipe connector 40, indicated by the two-dot chain line, interferes with the relative movement limiter 48. This interference clearly indicates that the relative movement of the pipe connector 40, in particular, is prevented by the relative movement limiter 48. Furthermore, the elastic modulus of the relative movement limiter 48 is greater than the elastic modulus of the sealing material 44. This further prevents the relative movement described above. These limitations reduce rattling that occurs when the pipe connector 40 moves relative to the separate-item connector 42.

[0047] [Variations] The embodiments disclosed herein are examples in all respects. The scope of the present invention is not limited to the above-described embodiments. Of course, various design modifications may be made to the above-described embodiments without departing from the spirit of the present invention.

[0048] For example, the material of the relative movement limiting body 48 is not limited to materials containing expanded graphite. The material of the relative movement limiting body 48 is not limited to synthetic resin. There are also no particular limitations on the height of the annular plane formed by the pipe side protrusion 64. When the interconnector 46 is fitted into the groove formed by the connector inner circumferential fitting groove forming portion 62 and the groove formed by the connector outer circumferential fitting groove forming portion 80, the relative movement limiting body 48 does not need to be elastically deformed.

[0049] Furthermore, the positions of the connector inner peripheral fitting groove, the connector outer peripheral fitting groove, and the seal placement groove are not limited to those described above, as long as they are different from the position between the pipe-side protruding portion 64 and the separate-body-side opposing portion 82 when one end of the pipe connector 40 enters the separate-body connector 42. [Explanation of symbols]

[0050] 10...tube 12...Pipe fitting 14...Nipple 40...Pipe connector 42...Separate connection body 44...Sealing material 46...Interconnected body 48...Relative movement limiter 60...Pipe side space forming part 62…Connection body circumference fitting groove forming part 64…Pipe side overhang 80...Connector outer periphery fitting groove forming portion 82... Separate side opposing part 84…Sealing material arrangement groove forming part 86...Connecting internal space forming part 100…Inner circumference 102...Outer periphery 104...Ring-shaped side 120,122,124…center axis 140...Overhang height 142…height difference

Claims

1. a pipe connector which is a cylindrical object to be connected to a pipe; a separate object connector which is a cylindrical object to be connected to an object other than the pipe; a sealant for sealing a gap between the separate connector and one end of the pipe connector inserted into the separate connector; an annular interconnector that connects the separate connector to the pipe connector; The pipe connector is a tube-side space forming portion that forms a tube-side space that is a space that is connected to the inside of the tube and is connected to one end of the tube; a connecting body circumferential fitting groove forming portion that is formed on the outer periphery of the tube-side space forming portion and that forms a connecting body circumferential fitting groove that is a groove into which a part of the inner periphery of the interconnector is fitted, The separate object connector is a connector outer periphery fitting groove forming portion that forms a connector outer periphery fitting groove, which is a groove into which a part of the outer periphery of the interconnector is fitted; a seal placement groove forming portion that is disposed on the opposite side of the pipe side as viewed from the position of the connector outer periphery fitting groove forming portion and forms a seal placement groove in which the seal is placed; a connector body space forming portion that is disposed on the opposite side of the pipe side as viewed from the position of the sealing material placement groove forming portion and forms a connector body space that is a space connected to the pipe side space, the pipe connector further has a pipe side protruding portion protruding from an outer periphery of the pipe side space forming portion, the separate-item connector further has a separate-item-side opposing portion that faces the pipe-side protruding portion as one end of the pipe connector enters the separate-item connector, a relative movement limiting member disposed between the pipe-side protruding portion and the separate-body-side opposing portion when one end of the pipe connector enters the separate-body connector; A pipe fitting characterized in that the connecting body circumferential fitting groove, the connecting body circumferential fitting groove, and the sealant placement groove are positioned at a position different from the position between the pipe side protrusion portion and the separate body side opposing portion when one end of the pipe connecting body enters the separate body connecting body.

2. 2. The pipe fitting according to claim 1, characterized in that the relative movement limiting body is compressed by the pipe side protrusion and the separate body side opposing portion and elastically deforms when the interconnector connects the separate body connector to the pipe connecting body, with a portion of the inner periphery of the interconnector fitting into the connecting body circumferential fitting groove and a portion of the outer periphery of the interconnector fitting into the connecting body circumferential fitting groove.

3. the relative movement restricting body is annular, The inner periphery of the relative movement limiting body is disposed to face the outer periphery of the tube-side space forming portion, 2. The pipe joint according to claim 1, wherein the pipe-side protrusion forms an annular flat surface facing a side surface of the relative movement restrictor.

4. A pipe fitting as described in claim 3, characterized in that the protrusion height of the annular plane of the pipe side protrusion portion from the point on the outer periphery of the pipe side space forming portion where the inner periphery of the relative movement limiting body faces is greater than the difference in height between the inner periphery of the relative movement limiting body and the outer periphery of the relative movement limiting body.

5. 2. The pipe joint according to claim 1, wherein the relative movement limiter comprises expanded graphite.

6. the connecting body circumferential fitting groove is disposed on the outer periphery of the pipe-side space forming portion on the pipe side as viewed from the position of the pipe-side protruding portion, the connecting body outer peripheral fitting groove is disposed on the pipe side as viewed from the separate body side opposing portion, 2. The pipe joint according to claim 1, wherein the seal placement groove is disposed on the opposite side of the separate-body-side opposing portion from the pipe side.

Images