JP2005127394A - Pipe joint - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pipe joint capable of adjusting relationship of an extension direction of piping and a position of a retainer in a circumferential direction. <P>SOLUTION: This pipe joint body 50 is split into a tube connecting part 50, and a pipe connecting part 70. While a pair of channel grooves 65 are formed on the tube connection part 60, a supporting plate 81 fittable with the channel grooves 65 is installed to the pipe connecting part 70. Eight slide-contact faces 82 are formed on the supporting plate 81. Therefore, when the slide-contact faces 82 are opposed to the channel grooves 65, assembly is possible regardless of its orientation. Once assembly is completed, a posture is maintained as it is thereafter. Accordingly, because a pushing direction of a pipe retainer 30 can be selected regardless of an extension direction of a tube S, an excellent assembling property can be obtained which never needs assembly at an improper posture. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a pipe joint.

For example, a pipe joint is known for connecting a relatively thin metal fuel pipe or resin tube (pipe) used in a fuel supply system of an automobile (Patent Document 1).
In this, a pipe (male connector member) is fitted to a pipe joint body (female connector member) to which piping can be connected, and the fitted pipe is further prevented by a retainer. A shaft hole for inserting a pipe is formed in the pipe joint main body, and a lateral hole communicating with the shaft hole is provided on the outer surface of the pipe joint main body, and a retainer is attached thereto. The retainer includes a pair of leg portions that can be locked to the pipe, and can be displaced between a temporary fixing position that allows insertion and extraction of the pipe and a lock position that prevents the pipe from being extracted.
Also, the shape of the pipe joint body is the same when the pipe and pipe are stretched in the same direction, that is, when the pipe axis and the pipe axis are overlapped, the pipe and pipe stretch directions intersect. In the case of setting, the pipe joint body may be bent, for example, in an L shape in accordance with the extension direction. In such a case, the pushing direction of the retainer from the temporarily fixed position with respect to the pipe in the locking direction is determined by which position of the pipe joint body the lateral hole is set.
Japanese National Patent Publication No. 10-509232

However, the direction in which the pipe extends and the surrounding empty space (retainer push-in operation space) vary depending on the vehicle type. Therefore, when a single pipe joint body is used for a plurality of vehicle types, a case where the retainer pushing space cannot be secured occurs. In such a case, in order to change the operation direction of the retainer, a pipe joint body in which only the arrangement of the lateral holes is shifted must be provided exclusively, and there is room for improvement due to lack of versatility.
This invention is completed based on the above situations, Comprising: It aims at providing the pipe joint which can adjust the positional relationship of the expansion direction of a piping and a retainer to the circumferential direction.

  As means for achieving the above object, the invention of claim 1 includes an introduction hole penetrating along the axis, and a first pipe can be connected to one end side thereof, and a second pipe is connected to the other end side. A pipe joint body in which a window portion communicating with the introduction hole is formed on the outer surface thereof, and a direction substantially perpendicular to the insertion direction of the second pipe with respect to the window portion A pipe joint provided with a pipe retainer that is attached to the second pipe so as to be able to advance and retreat, and is engaged with the second pipe by entering and exiting the introduction hole with the advance and retreat operation. The pipe joint main body is divided into a first pipe connection part that can connect the first pipe, and a second pipe connection part that can connect the second pipe and the pipe retainer. Connect both connections to one of the two pipe connections And a guide portion capable of receiving the support portion in a direction orthogonal to the insertion direction of the second pipe on the other side, and both connecting portions on the outer peripheral surface of the support portion. A plurality of slidable contact surfaces that are slidable to the guide portion in the circumferential direction, and selectively sliding the slidable contact surface to the guide portion, thereby connecting the first pipe connecting portion. And the second pipe connection portion are characterized in that they can be angularly displaced.

  According to a second aspect of the present invention, in the first aspect, the guide portion includes a pair of channel grooves facing each other, and the support portion has a regular polygonal shape centering on an axis of the second pipe connection portion. And each outer surface which faces on both sides of the said axis line has the characteristic that it is the structure which forms the said sliding contact surface.

  The invention according to claim 3 is the one according to claim 1 or 2, wherein the two pipe connection portions are connected in a state where the fitting surfaces of the both pipe connection portions are applied to each other. A seal portion for sealing between the second pipe and a hole wall of the introduction hole is inserted into the introduction hole in the one pipe connection portion, and an end surface of the seal portion is the first pipe connection portion. And the fitting surface of the support portion is located at the opening edge when the first and second pipe connecting portions are connected. It is characterized in that it is configured to be a retaining surface that can contact and seal the seal portion.

<Invention of Claim 1>
According to the first aspect of the present invention, a plurality of sliding surfaces are formed in the circumferential direction on the outer peripheral surface of the support portion, and a plurality of fitting postures of the support portion with respect to the guide portion can be selected. Therefore, the attachment angle of the pipe retainer with respect to the first pipe can be adjusted by changing the fitting posture. That is, since the pushing direction of the pipe retainer can be selected regardless of the extending direction of the first pipe, it is not forced to assemble in an unreasonable posture, and the assemblability is excellent.

<Invention of Claim 2>
According to the second aspect of the present invention, the guide portion is composed of a pair of channel grooves, and after the assembly, the support portion is sandwiched by the groove walls of both channel grooves and is prevented from rotating. In this way, the channel groove has both a guide function and a rotation preventing function, and the structure of the pipe joint is simplified. Further, if there is no change in the configuration of the channel groove or the support portion (configuration of the connecting portion of both pipe connecting portions), the first pipe connecting portion is assumed to have a plurality of types (for example, the configuration of the portion connecting the first pipe). Even if it is different, the second pipe connection portion can be commonly used for each first pipe connection portion, and the versatility is excellent.

<Invention of Claim 3>
According to the third aspect of the present invention, since the seal portion is prevented from being removed by the support portion, it is not necessary to provide a dedicated mechanism for retaining the seal portion, and the structure of the pipe joint is simplified.

<Embodiment 1>
A first embodiment of the present invention will be described with reference to FIGS.
In FIG. 1, reference numeral 20 denotes a synthetic resin or metal pipe, and a retaining flange 21 is formed over the entire circumference at a position near its tip.
On the other hand, 50 is a pipe joint main body, which will be described in detail later, and is divided into two parts at the front and rear. The divided front part is a tube connecting part (corresponding to the first pipe connecting part of the present invention) 60, and the rear part is a pipe connecting part (corresponding to the second pipe connecting part of the present invention) 70. The tube S is connected to the tube connecting portion 60, and the pipe retainer 30 and the pipe 20 are connected to the pipe connecting portion 70. Hereinafter, the left side in FIG. 1 will be referred to as the front side, and the right side in FIG. 1 will be described as the rear side.

  The tube fitting main body 50 is provided with a tube fitting portion 62 that bends downward at the end of the tubular portion. A plurality of annular retaining protrusions 62A are formed along the axis on the outer peripheral surface of the tube fitting portion 62, and the synthetic resin tube S that is externally fitted thereto is retained. ing. Further, an introduction hole 51 for inserting the pipe 20 is formed in the pipe joint body 50 along the axis.

  As shown in FIG. 3, the intermediate portion 52 is formed in a step shape in the middle of the axial direction of the introduction hole 51, and here there are two seal rings (corresponding to the seal portions of the present invention) 24A, 24B. It is inserted. Both seal rings 24 are in close contact with the outer peripheral surface of the pipe 20 to provide a seal between the pipe 20 and the hole wall of the introduction hole 51. Further, a small-diameter portion 53 and an insertion portion 54 are formed between the intermediate portion 52 and the pipe entrance, that is, the rear edge of the pipe joint body 50 in the introduction hole 51. The inner diameter of the insertion portion 54 is larger than the inner diameter of the intermediate portion 52, and is substantially the same diameter as the outer periphery of the retaining flange 21. The small diameter portion 53 will be described later.

  On the other hand, a flange edge 71 is formed at the rear end of the pipe joint main body 50 so as to project along the circumferential direction. The flange edge 71 has a substantially square shape, and on the rear side thereof, a pair of projecting edges 72 and 73 which form a substantially square shape and project along the circumferential direction are provided.

  A mounting portion 74 for mounting the pipe retainer 30 described below is provided between the front projecting edge 72 and the flange edge 71. The attachment portion 74 has a cylindrical shape, and a portion of the upper surface near the flange 71 is opened (see FIG. 15), which is a window portion 77 communicating with the inside of the introduction hole 51. A retaining piece 45 of the pipe retainer 30 to be described below enters and exits the introduction hole 51 through the window portion 77. The central portion of the window 77 is provided with a rib 74A, which is intended to reinforce the rigidity of the mounting portion 74.

  The pipe retainer 30 is made of a synthetic resin and has a plate-like base portion 31 and is provided with a pair of locking arms 41 extending downward and a pair of retaining pieces 45 extending downward in the rear edge. As will be described later, the pipe retainer 30 can be locked to the pipe joint main body 50 in two stages, that is, a temporary fixing position shown in FIG. 6 and a locking position shown in FIG.

  Both locking arms 41 are arranged outside the base portion 31, and a retaining piece 45 is arranged inside the locking arm 41. Of these, the retaining piece 45 is formed with a width dimension that can be inserted into the window portion 77, and the inner peripheral side of the proximal end portion thereof is formed in an arc shape, and the proximal end portion is formed in comparison with the distal end portion. Rigidity is increased and bending deformation is impossible. On the other hand, the locking arm 41 is formed with a large amount of protrusion downward from the retaining piece 45 and is formed with a substantially constant lateral width over its entire height, so that it can be elastically displaced. In addition, a slit 46 that is notched straight toward the base 31 is provided between the retaining pieces 45, and this is a relief for the rib 74A.

  An inward locking claw 42 is bent at the distal end portion of the locking arm 41. The upper surface of the locking claw 42 is formed flat over the entire length from the proximal end to the distal end, and this is the upper locking surface 42A. In addition, the base end side of the lower surface of the locking claw 42 is a flat lower lock surface 42B, and the tip end side is tapered, and an arcuate guiding portion 42C is provided there.

  On the other hand, the pipe joint main body 50 is provided with a lock hole 78 communicating with the introduction hole 51 at the center portion in the height direction on the left and right side surfaces of the attachment portion 74. As shown in FIG. 2, the ceiling surface 78A of the lock hole 78 is set to have the same height on the flange edge 71 side and the height on the overhang edge 72 side, but the bottom surface is the lower edge on the flange edge 71 side. Is lower than the height of the lower edge on the overhang edge 72 side, and a step 75 is provided.

  When the locking claw 42 is inserted into the lock hole 78, the upper locking surface 42A of the locking claw 42 is locked to the ceiling surface 78A of the locking hole 78 as shown in FIG. The lower locking surface 42B of the locking claw 42 is locked to the stepped portion 75 of the lock hole 78 and the movement of the pipe retainer 30 is pushed. As a result, the pipe retainer 30 is locked at the temporary fixing position shown in FIG.

  In this temporarily fixed position, the base 31 is located at a predetermined height away from the outer peripheral surface of the pipe joint main body 50, and the retaining piece 45 is partially inserted into the window 77 but is introduced. The pipe 20 is completely retracted from the hole 51 so that the pipe 20 can be inserted into and removed from the introduction hole 51.

  Next, the unlocking structure of the locking claw 42 with respect to the lock hole 78 will be described. On the side surface of the locking claw 42 on the front side in the fitting direction, a guide slope 43 having a downward slope is formed on the inner side. In the stop position, the tip end portion of the locking claw 42 locked in the lock hole 78 enters the introduction hole 51. This locking claw 42 is inserted to a position where the pipe 20 is at a normal depth, that is, the position shown in FIG. 4 and the front surface of the retaining flange 21 contacts the end surface of the insertion portion 54 (hereinafter referred to as a normal insertion position). Accordingly, the retaining flange 21 expands the locking claws 42 in the unlocking direction in a positional relationship that interferes with the retaining flange 21 in the axial direction.

  As a result, as shown in FIG. 7, the locking between the lower lock surface 42B of the locking claw 42 and the stepped portion 75 is released. In the unlocked state, the guide portion 42C of the locking claw 42 is located facing the upper portion of the step portion 75, but the upper portion of the step portion 75 has a slope that tapers upward in the figure. A tapered portion 75A is provided. Therefore, when a force acts in the pushing direction from this state, the pipe retainer 30 is further expanded by receiving the guiding action by the guide portion 42C and the taper portion 75A, and the lock is completely released, so that it can be displaced downward in the figure. Become.

  The lower surface of the attachment portion 74 of the pipe joint main body 50 is a flat surface, and both left and right edges thereof are locking seat surfaces 74B. The upper locking surface 42A of the locking claw 42 is locked to the seat surface 74B when the pipe retainer 30 is in the locked position (position where the retaining piece 45 is latched to the retaining flange 21). Yes. As a result, the pipe retainer 30 prevents the pipe 20 from being removed (see FIG. 8).

  In the locked position, the lower surface of the base 31 is substantially in contact with the upper surface of the pipe joint main body 50, that is, the upper end surfaces of the two projecting edges 72 and 73. A release recess 35 for releasing the lock is provided so that a slight gap is formed between the upper end surfaces of the overhanging edges 72 and 73. A release jig (not shown) can be inserted into the release recess 35 from this gap, and the locking claw 42 can be unlocked from the seating surface 74B by performing a predetermined release operation. It is like that.

  Next, the connection structure of the tube connection part 60 and the pipe connection part 70 is demonstrated. As shown in FIG. 9, a plate-like support plate (corresponding to the support portion of the present invention) 81 is provided on the front side of the overhang edge 73 in the pipe connection portion 70, and the support plate 81 and the overhang edge 73 are Are connected by a cylindrical relief step 85.

The support plate 81 is formed in a regular octagon centered on the axis of the pipe connection portion 70. Eight sides on the outer periphery of the support wall are slidable contact surfaces 82 that can slidably contact a channel groove 65 (corresponding to the guide portion of the present invention) 65 described below. Further, as a matter of course, each of the sliding contact surfaces 82 has the same facing distance (A dimension shown in FIG. 12) between the facing surfaces.
Further, the relief step 85 is provided for letting out the counterpart part (the guide wall 64) when assembling both the connecting parts 60 and 70.

  On the other hand, an attachment seat surface 63 having an octagonal shape is provided at the rear portion of the tube connecting portion 60. A pair of guide walls 64 and lock projections 68 are provided on the fitting seat surface 63, that is, on the side to be the mating surface with the pipe connection portion 70. In this embodiment, the guide wall 64 is provided along both sides (upper and lower sides shown in FIG. 9) orthogonal to the extending direction of the tube fitting portion 62 among the sides of the mounting seat surface 63.

  The guide walls 64 have an L-shaped cross section and are provided so that the top and bottom face each other. Further, the both guide walls 64 are arranged symmetrically about the axis of the tube connecting portion 60. The inner wall of the guide wall 64 forms a channel groove 65. As shown in FIG. 12, the distance between the groove walls of the channel groove 65 (E dimension shown in FIG. 12) is the distance (A (Dimension)). In addition, the channel width of the channel groove 65 (the distance between the mounting seat surface 63 and the groove wall) is slightly larger than the thickness of the support plate 81. Therefore, when the support plate 81 is inserted into the groove from the opening side of the channel groove 65, the slidable contact surface 82 of the support plate 81 slidably contacts the inner wall of the channel groove 65, and the assembling operation of both the connecting portions 60 and 70 is guided. It is like that. Further, the channel groove 65 penetrates left and right (in a direction orthogonal to the axis of the pipe connecting portion 70), and the support plate 81 can be assembled from either the left or right direction.

  On the other hand, the lock protrusion 68 is provided along the left and right sides along the extending direction of the tube fitting portion 62. An inner surface of these lock protrusions 68 is an upright lock surface 68A. These lock protrusions 68 are symmetrically arranged with respect to the axis of the tube connecting portion 60, and the distance between the lock surfaces 68A (D dimension shown in FIG. 12) is the opposite distance (A dimension) of the sliding contact surface 82. Are set equal.

Accordingly, when the support plate 81 is inserted into the channel groove 65 in such a posture that the upper and lower sliding contact surfaces 82A and 82B face each other as shown in FIG. 12, the axis of the tube connecting portion 60 and the pipe connecting portion 70 When reaching the position where the axis just matches, the left and right sliding contact surfaces 82C, 82D of the support plate 81 are positioned exactly between the lock surfaces 68A of the lock projection 68 (connection position). As a result, the support plate 81 is sandwiched between the lock protrusions 68, and both the connection portions 60 and 70 are locked in the direction intersecting the axis. In this connection position, the lock surface 68A of the lock projection 68 and the inner wall of the guide wall 64 are positioned to face the corresponding sliding contact surfaces 82, whereby both the connection portions 60 and 70 are prevented from rotating. .
Further, the outer surface of the lock projection 68 is a portion in which the front surface of the support plate 81 in FIG. 12 is in sliding contact when the connecting portions 60 and 70 are assembled. Therefore, the outer surface of the lock projection 68 is an invitation surface 68B having an inclination that is radially outwardly lowered, so that the assembling operation can be performed smoothly.

  The support plate 81 is a regular octagon as described above. Accordingly, as shown in FIG. 12, if any of the sliding contact surfaces 82 is in the direction facing the channel groove 65, the assembly is possible regardless of the directionality, and the tube fitting portion 62 extends (see FIG. 12). The pipe retainer 30 can be mounted with its orientation changed every 45 degrees such as upward, downward, lateral, oblique, etc.

In addition, as shown in FIG. 10, in this embodiment, the seal rings 24 </ b> A and 24 </ b> B are arranged in a pair in the front and rear in the intermediate portion 52 of the introduction hole 51. It is the front surface (fitting surface) and faces the opening edge of the intermediate portion 52. On the other hand, the introduction hole 51 on the pipe connection portion 70 side is formed with an inner diameter dimension that can hold the seal ring 24, and the inner diameter dimension is smaller than the inner diameter of the intermediate portion 52 (small diameter portion 53. ). Therefore, when both connecting portions 60 and 70 are connected, the support plate 81 abuts against the mounting seat surface 63 and is positioned in front of the seal ring 24A so as to prevent the seal rings 24A and 24B from being removed. .
The front surface in FIG. 12 of the mounting seat surface 63 corresponds to the fitting surface of the first pipe connection portion of the present invention, and the front surface in FIG. 12 of the support plate 81 is the second pipe of the present invention. This corresponds to the fitting surface of the connecting portion.

Next, functions and effects of this embodiment will be described.
The tube S and the pipe 20 when the extension direction of the tube S is the vertical direction and the operation direction of the pipe retainer 30 is the pushing direction from the upper side to the lower side (generally the pushing operability is generally best). The connection procedure will be described.
Prior to attaching the pipe joint to the pipe 20, the pipe retainer 30 is set to the temporary fixing position with respect to the pipe joint main body 50, and the tube fitting portion 62 is fitted to the tube S to fit the pipe joint main body 50 and the tube S. Keep them connected. Then, from this state, the pipe 20 is aligned and pushed into the introduction hole 51 of the pipe joint body 50.

  Then, the retaining flange 21 of the pipe 20 moves forward while being in sliding contact with the hole wall of the introduction hole 51. Eventually, the retaining flange 21 comes into contact with the guide slope 43 of the locking claw 42 protruding into the introduction hole 51. In the subsequent insertion process, the retaining flange 21 further advances while expanding the locking arm 41, and eventually the pipe 20 reaches the regular insertion position shown in FIG.

In this regular insertion position, as shown in FIG. 7, the lower locking surface 42B of the locking claw 42 and the stepped portion 75 are unlocked, and the guide portion 42C of the locking claw 42 is stepped. The portion 75 is positioned to face the tapered portion 75A. Therefore, if the pipe retainer 30 is pushed downward from this state, the guide arm 42C of the locking claw 42 and the guide action by the tapered portion 75A of the stepped portion 75 also help, and the locking arm 41 further expands. The locking with respect to the lock hole 78 is completely released.
Eventually, when the locking claw 42 passes through the stepped portion 75, the locking arm 41 is elastically restored, and the locking claw 42 is locked to the seat surface 74B (lock position). In this locked position, the retaining piece 45 enters the introduction hole 51 through the window 77 and is locked to the retaining flange 21. Thereby, the pipe 20 is held in the retaining state.

  By the way, according to the present embodiment, the pipe joint main body 50 is divided into the tube connection portion 60 and the pipe connection portion 70, and the eight sliding contact surfaces 82 are provided on the outer periphery of the support plate 81. . Therefore, if the slidable contact surface 82 is in the direction facing the channel groove 65, as shown in FIG. 12, it can be assembled regardless of its directionality. Posture is maintained.

  Therefore, when the pipe joint is applied to a different vehicle type, the tube connection portion 60 and the pipe connection are connected in advance even when the tube S is not in the vertical direction, for example, in the left-right direction or in the oblique direction. When connecting the portions 70, selecting the slidable contact surface 82 in accordance with the direction and assembling the channel groove 65 can adjust the mounting angle of both the connecting portions 60, 70, and always push the pipe retainer 30 in. Since the direction can be the pushing direction from the upper side to the lower side, the pushing operation of the pipe retainer 30 is not forced in an unreasonable posture, and the assembling property is excellent.

<Embodiment 2>
In the first embodiment, the pipe joint is configured by the pipe joint main body 50 and the pipe retainer 30, but in the second embodiment, the fitting detection checker 90 is added to the configuration of the first embodiment, and other configurations are the same as those of the first embodiment. Since it is the same as the configuration, the same parts are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIG. 17, the fitting detection checker 90 includes a checker main body portion 91 having a substantially U shape including a pair of left and right elastic lock arms 93 that are allowed to bend in the opening leg direction. An operation portion 97 formed in a loop shape is integrally formed on the outer peripheral surface of the checker body 91. The fitting detection checker 90 is detachably attached to the pipe joint body 50 from below in the figure. That is, the outer width dimension between the two elastic lock arms 93 is substantially equal to the inner width dimension of the region sandwiched between the two projecting edges 72 and 73 of the pipe joint main body 50. Therefore, when both elastic lock arms 93 are inserted into the space between the two overhanging edges 72 and 73, the fitting detection checker 90 is restricted from moving back and forth with respect to the pipe joint body 50 by the wall surfaces of both overhanging edges 72 and 73. Only the vertical movement along the lines 72 and 73 is allowed. The movement direction of the fitting detection checker 90 is a direction along the movement direction (push-in direction) of the pipe retainer 30.

  A pair of lock claws 95 project inwardly at the free ends of both elastic lock arms 93 and can be locked to the upper surface of the base 31 of the pipe retainer 30. As a result, the fitting detection checker 90 is prevented from coming off with respect to the pipe joint body 50 in the direction along the protruding edges 72 and 73, that is, in the removal operation direction of the fitting detection checker 50.

Further, the locking force by the lock claw 95 is set to be larger than the pressing force required when the pipe retainer 30 in the unlocked state is pressed from the temporarily fixed position to the locked position. Accordingly, when the fitting detection checker 90 is pulled downward while the pipe 20 is inserted in the regular insertion position, the locking state between the lock claw 95 and the pipe retainer 30 is maintained during the pulling operation. The pipe retainer 30 is automatically displaced from the temporarily fixed position to the locked position in accordance with the removal operation of the fitting detection checker 90.
Thereafter, if the fitting detection checker 90 is further pulled in the same direction, the fitting detection checker 90 can be removed from the pipe joint body 50. If the fitting detection checker 90 is provided in this manner, whether or not the pipe 20 can be fitted can be confirmed by detaching the portion, and thus the reliability is high.

<Embodiment 3>
A third embodiment will be described with reference to FIGS.
In the present embodiment, the pipe connection portion 70 and the pipe retainer 30 are used in common with the configuration of the first embodiment, and the configuration of the tube connection portion 60 is changed. Specifically, in the first embodiment, the tube connecting portion 60 is bent in an L shape and the tube fitting portion 62 extends downward, but in the third embodiment, the tube fitting portions 95 and 96 are provided. It extends diagonally downward (lower left side in FIG. 18) or straight (left side in FIG. 19). On the other hand, the configuration of the mounting seat surface 63, the channel groove 65, and the lock protrusion 68 is the same as that of the first embodiment, and a pipe connection portion 70 is connected thereto.
Thus, if the structure (attachment seating surface 63, channel groove 65, lock projection 68, etc.) of the connecting portion with respect to the pipe connecting portion 70 in the tube connecting portion 60 is made common, the configuration of the tube fitting portion 62 is different. Since the pipe connection part 70 and the pipe retainer 30 can be used in common for the thing, it is excellent in versatility.

  <Other embodiments>

  The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention, and further, within the scope not departing from the gist of the invention other than the following. Various modifications can be made.

  (1) In the present embodiment, the support plate 81 has a regular octagonal configuration, but may be a regular polygon, and may be, for example, a regular square or a regular hexagon.

  (2) According to this embodiment, while the channel groove 65 is provided in the tube connection portion 60 and the support plate 81 is provided in the pipe connection portion 70, the configuration may be reversed.

The disassembled perspective view of the pipe joint which concerns on Embodiment 1 of this invention. Side view of pipe, fitting body and retainer Vertical sectional view of the pipe joint showing the state before the pipe is inserted Vertical sectional view of the pipe joint showing the pipe in the normal insertion position Vertical sectional view of a pipe joint showing the pipe retainer locked to the retaining flange of the pipe Vertical sectional view of the pipe joint showing a state where the retainer is in the temporary fixing position (cross sectional view taken along the line AA in FIG. 2) Vertical sectional view of the pipe joint showing the pipe inserted in the normal insertion position Vertical sectional view of the pipe joint showing the pipe retainer pushed into the locked position Exploded perspective view of pipe fitting body, retainer, and pipe Sectional drawing showing assembly operation of pipe connection part to tube connection part Cross-sectional view showing the assembly operation Sectional drawing which shows an example of the assembly | attachment attitude | position of a pipe connection part with respect to a tube connection part Sectional drawing showing the state by which the pipe connection part was connected with respect to the tube connection part Side view of tube connection Plan view of pipe connection Side view of pipe connection Sectional drawing which concerns on Embodiment 2 of this invention Side view according to Embodiment 3 of the present invention Similarly, a side view according to Embodiment 3

Explanation of symbols

S ... Tube (first piping)
20 ... Pipe (second pipe)
DESCRIPTION OF SYMBOLS 30 ... Pipe retainer 50 ... Pipe fitting main body 51 ... Introduction hole 60 ... Tube connection part (1st piping connection part)
65 ... Channel groove (guide part)
70: Pipe connection (second pipe connection)
81 ... Support plate (support part)
82 ... Sliding contact surface

Claims (3)

In addition to having an introduction hole penetrating along the axis, the first pipe can be connected to one end thereof, the second pipe can be inserted to the other end, and the introduction hole is formed on the outer surface thereof. A pipe joint body in which a communicating window is formed;
It is attached to the window portion so as to be able to advance and retreat in a direction substantially perpendicular to the insertion direction of the second pipe, and engages with the second pipe by entering and exiting the introduction hole with the advance and retreat operation. Or a pipe joint provided with a pipe retainer for releasing the lock,
The pipe joint main body is divided into a first pipe connection portion that can connect the first pipe, and a second pipe connection portion that can connect the second pipe and the pipe retainer. Either one of the pipe connection parts is provided with a support part for connecting both connection parts, and the other side has a guide part that can receive the support part from a direction orthogonal to the insertion direction of the second pipe. As well as
When both connecting portions are attached to the outer peripheral surface of the support portion, a plurality of sliding contact surfaces capable of sliding contact with the guide portion are provided in the circumferential direction, and these sliding contact surfaces are selectively used as the guide portion. A pipe joint characterized in that the connection posture between the first pipe connection part and the second pipe connection part can be angularly displaced by sliding on the pipe. The guide portion comprises a pair of channel grooves facing each other, while the support portion has a regular polygonal shape centered on the axis of the second pipe connection portion, and the outer surfaces facing each other across the axis are the sliding contact surfaces. The pipe joint according to claim 1, wherein the pipe joint is formed. In what is connected in a state where the fitting surfaces of the both pipe connection parts are provided to each other, both pipe connection parts,
The introduction hole in the first pipe connection part is inserted with a seal part for sealing between the second pipe and the hole wall of the introduction hole, and the end face of the seal part is the first pipe. It is a fitting surface of the connection part and is located facing the opening edge of the introduction hole,
The fitting surface of the support portion is configured to be a retaining surface that can contact the opening edge and prevent the sealing portion when the first and second pipe connecting portions are connected. The pipe joint according to claim 1 or 2.

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