JP4458983B2 - Pipe fitting - Google Patents

Description

  The present invention relates to a pipe joint.

Conventionally, a pipe joint called a connector has been used for connection between automobile piping and tubes. Among them, there is known a type in which confirmation of whether or not the connection between the pipe and the tube is made in a normal state is performed depending on whether or not the checker can be removed (Patent Document 1).
Japanese Patent Application No. 2003-343562

  This is a main body into which piping is inserted, and is mounted so as to be movable in the radial direction with respect to the main body. And a retainer for preventing the pipe from coming off. In addition, a checker is attached to the main body so that it can be removed from the main body only when the pipe is inserted to the normal depth position.

  However, with such a structure, the pipe joint is composed of three independent parts such as a main body, a retainer, and a checker. Therefore, considering the part management or assembly work, it is desired that the pipe joint be configured with fewer parts. .

  This invention is completed based on the above situations, Comprising: It aims at providing the pipe joint which enabled reduction of a number of parts.

<Invention of Claim 1>
As a means for achieving the above object, the invention of claim 1 is characterized in that an insertion hole into which a pipe having a retaining flange can be inserted is formed along the axial direction, and the side surface thereof communicates with the insertion hole. A pipe joint body formed with a window, a lock that is assembled to the pipe joint body and allows the pipe to be inserted into the insertion hole, and is locked with the retaining flange to prevent the pipe from coming off. between the position, and it includes a retainer movable, and a checker for the pipe to detect whether it is inserted to proper depth with respect to the insertion hole in a direction crossing the axis of the insertion hole The retainer has a base and a base formed on the base and waits at a position where the pipe can be inserted into the insertion hole at the temporary fixing position. A pipe retaining portion that is locked to the rear surface of the die, and a base that has a detecting portion that can be bent and deformed, and that has a detecting portion at the tip, and in the temporary fixing position, the detecting portion is inserted through the window portion. The retainer is held at the temporarily fixed position so as not to move to the locked position by being inserted into the hole and locked to the stopper formed at the window, and the pipe is inserted at the temporarily fixed position. When inserted to a normal depth with respect to the hole, the detection flange is slidably contacted with the guide surface formed on the detection portion, so that the detection portion is deformed to be pushed out from the insertion hole and the detection is performed. The retainer can be released from the temporarily fixed position to the locked position by releasing the locking between the stopper portion and the stopper portion. A detection piece that performs detent stop to a stop position, and a contact surface that is formed on the base and contacts the pipe joint body at the lock position and restricts the retainer from moving beyond the lock position, The checker includes an operation piece for performing a pulling operation, a connecting portion provided on the operation piece and connected to the retainer in a breakable manner, and provided on the operation piece at the temporarily fixed position on the pipe joint body. Both the pulling operation of the operation piece and the breakage of the connecting portion are disabled by locking to the formed locking portion, but locking to the locking portion by moving to the locking position together with the retainer Is released and the operating piece is pulled in the locked position to break the connecting portion so that the checker can be separated from the retainer and pulled out. And a section .

<Invention of Claim 2>
According to a second aspect of the present invention, in the first aspect of the present invention, the outer peripheral surface of the pipe joint main body is provided with a guide portion along the checker removal operation direction, and the checker has at least the temporary fixing position. Is characterized in that a posture holding portion that is fitted with the guide portion and holds the posture of the checker is formed.

<Invention of Claim 3 >
According to a third aspect of the present invention, in the first or second aspect, the retainer can be moved to the lock position by a pushing operation from the temporary fixing position, while the checker moves the retainer to the lock position. has a loop of the operation lever as disposed inside, the pushing direction of the retainer is characterized in that it is possible extraction operation in the opposite direction.

<Invention of Claim 4 >
A fourth aspect of the present invention, in what according to claim 1 or claim 2, wherein the checker while having the operating piece formed in a loop shape, the retainer on the outside of the connected and loops at both ends of the loop The moving direction of the retainer from the temporarily fixed position to the locked position is the same direction as the operation direction of extracting the operation piece.

<Invention of Claim 5 >
Invention of Claim 5 is the pipe joint of Claim 3 , Comprising: The said guide part is a guide groove formed along the moving direction of a retainer in the said pipe joint main body, Moreover, the said latching | locking part is said The guide groove is formed so as to protrude outward at the opening edge of the guide groove, while the guide portion protrudes from the end of the operation piece in the width direction of the operation piece and the inner surface of the operation piece. And the posture holding portion that fits into the groove,
Further, the detection piece of the retainer is fitted in the guide groove and can be moved along the guide groove, and an outer surface of the detection piece is provided with an inclined surface which is inclined upward along the extraction direction of the checker. When the retainer is in the temporarily fixed position, the escape protrusion is positioned higher than the locking portion in the checker extraction direction, and when the retainer is in the locked position, the locking protrusion is formed. Since the position holding unit rides along the inclined surface when the checker is pulled out, the interference between the latching part and the locking part is caused by being positioned lower than the position and higher than the position holding part. The present invention is characterized in that it can be avoided.

<Invention of Claim 1>
According to the first aspect of the present invention, the retainer in an integrated state with the checker is held at the temporarily fixed position with respect to the pipe joint main body. Further, since the pipe retaining portion is waiting at a predetermined position at the temporary fixing position, the pipe can be inserted into the insertion hole as it is. When the retainer is moved from the temporarily fixed position to the locked position after the pipe is inserted to the normal depth, the pipe retaining portion is locked to the rear surface of the retaining flange, thereby preventing the pipe from coming off.

  When the pipe is inserted into the insertion hole, the detection piece is displaced in the direction in which the detection unit is pushed out of the insertion hole, and interlocking with this displacement releases the lock between the checker's latching portion and the locking portion. The In this state, if the checker is operated in the extraction direction, this operating force can be applied to the connection portion, so that the connection portion can be broken and extracted. The operator knows that the pipe has been inserted to the normal depth when the checker is removed.

However, if it is not inserted to the normal depth, the detection piece is not sufficiently bent and does not release the latching portion from the latching portion, so even if the checker is operated in the pulling direction, The operating force is received by this locking portion and cannot be applied to the connecting portion. Therefore, the connecting portion is not broken and the checker cannot be removed. The operator knows the half-insertion of the pipe with this. In the temporary fixing position, the retainer is prevented from inadvertently moving to the locking position due to the engagement between the detection unit and the stopper unit. In addition, since the retainer is held at the temporary fixing position by using the detection unit, the configuration of the pipe joint can be simplified as long as a special configuration for holding is not added.

<Invention of Claim 2>
According to the invention of claim 2, the checker can be held in the normal posture through the fitting of the guide portion and the posture holding portion. If the tilting of the checker is allowed without holding the posture, there is a possibility that the connecting portion is broken due to the tilting operation. The reliability of the checker detection can be increased.

<Invention of Claim 3 >
According to the invention of claim 3 , unless the pipe is inserted to the normal depth, the retainer cannot be moved to the locked position, and the checker cannot be removed. In such a case, if the operation direction of pushing the retainer is different from the operation direction of pulling out the checker, it is possible to detect the half insertion of the pipe through each operation, so that more reliable detection is possible. .

<Invention of Claim 4 >
According to the invention of claim 4 , since the retainer can be moved from the temporary fixing position to the lock position by the checker extraction operation, the workability is excellent.

<Invention of Claim 5 >
According to the fifth aspect of the present invention, when the retainer is in the temporary fixing position, the latching portion and the locking portion protruding from the pipe joint main body are locked. Thereafter, when the pipe is inserted to a normal depth and the retainer moves to the locked position, the checker also moves integrally with the retainer, and the latching portion moves to a position spaced below the locking portion. After that, when the checker is operated in the pulling direction and the connecting portion is broken, the checker is separated from the retainer and moves alone in the pulling direction. Although there is a concern that it may become an obstacle to extraction, in Claim 6, since the posture holding part rides on the inclined surface of the retainer, interference between the latching part and the locking part can be avoided. The extraction operation can be made smooth.

<Embodiment 1>
A first embodiment of the present invention will be described with reference to FIGS.

  In FIG. 1, P is a resin or metal pipe, and a retaining flange 1 is formed to protrude along the entire circumference near the tip of the pipe. Reference numeral 2 denotes a pipe joint body, which is formed of a resin material in a substantially cylindrical shape, and has a tube connection portion 4 having a plurality of protrusions 3 at the tip, so that the tube T can be connected. An insertion hole 5 for inserting the pipe P is formed in the pipe joint body 2 along the axis.

  A step 6 is formed at a boundary portion between the insertion hole 5 and a portion corresponding to the tube connection portion 4. The entrance side portion of the insertion hole 5 has a larger diameter, and two O-rings 7, a spacer 8, and an O-ring retainer 9 are attached here to seal the pipe P.

  On the rear end surface of the pipe joint main body 2, a flange edge 10 is formed so as to protrude outward over the entire circumference. In this embodiment, the flange edge 10 is formed in a substantially square shape. In addition, a protruding edge 11 is formed to protrude outward on a side surface of the pipe joint main body 2 at a position spaced forward from the flange edge 10 in the axial direction. The overhang edge 11 is formed on the outer surface of the pipe joint body 2 excluding the surface (retainer mounting surface 14) facing the base portion 13 of the retainer 12, and a gap between the flange edge 10 is formed with a retainer 12 and a checker described later. 15 is a guide groove 16 (guide portion) for guiding the operation.

  Further, as shown in FIG. 2, two insertion holes 18 defined by the partition pieces 17 are opened on the retainer mounting surface 14 and communicate with the insertion hole 5. Both insertion holes 18 allow insertion of leg pieces 19 (pipe removal prevention portions) of the retainer 12 described later. Further, windows 20 as shown in FIG. 3 are opened in portions located on both side surfaces adjacent to the retainer mounting surface 14 in the bottom surface of the guide groove 16, and both lead to the insertion hole 5. Both window portions 20 play a role of allowing the detection portion of the detection piece 21 of the retainer 12 to enter and exit the insertion hole 5. A transition stopper portion 23 that prevents the retainer 12 from inadvertently moving from the temporarily fixed position to the locked position is provided at one corner portion (upper side opposite to the entrance side of the insertion hole 5) of the two window portions 20. A taper surface 24 is formed at the lower end of the outer surface of the outer surface. Furthermore, a pair of locking projections 25 (locking portions) are formed so as to protrude from both side surfaces of the pipe joint main body 2 at intermediate positions in the height direction between the flange edge 10 and the overhang edge.

  Next, the retainer 12 for retaining and holding the pipe P will be described. As shown in FIG. 4, the retainer 12 is integrated with the checker 15 through a thin connection portion 26, and is entirely formed of a resin material. ing.

  The retainer 12 has a base portion 13, and an inner surface side of the base portion 13 serves as a contact surface 27 (corresponding to a contact surface of the present application) that can contact the retainer mounting surface 14. Further, a pair of detection pieces 21 are formed on the inner surface side of the base portion and closer to both ends toward the pipe joint body 2 side. Both detection pieces 21 straddle the pipe fitting main body 2 from the retainer mounting surface 14 side, and the distal end side is fitted in the guide groove 16 in a substantially close contact state. Further, the leading ends of both detection pieces 21 are bent inward to form a detection portion 22, and this detection portion 22 is inserted into the insertion hole 5 through the window portion 20 when the retainer 12 is in the temporary fixing position, and is removed. It enters into the passage area of the stop flange 1. The detecting unit 22 is detachably locked with the above-described transition stopper unit 23, thereby restricting the retainer 12 from moving upward in the drawing at the temporary fixing position (the position shown in FIG. 4). In addition, the opposite side of the opening edge of the window portion 20 with respect to the transition stopper portion 23 in the vertical direction is a drop-off stopper portion 28 so that the retainer 12 cannot be moved downward in the figure at the temporary fixing position. Thus, the retainer 12 is held in a state of being positioned at the temporary fixing position.

  In addition, an expansion guide surface 29 is formed with an inward gradient on the surface opposite to the insertion direction of the pipe P in both the detection portions 22, and when the pipe P reaches the normal depth, it slides on the retaining flange 1. It is possible to guide the deformation of the open legs of both detection pieces 21 so as to contact and push the detection unit 22 radially outward from the insertion hole 5. Further, the retainer 12 receives the guide of the tapered surface 24 of the transition stopper portion 23 described above, and is slidably contacted along the bottom surface of the guide groove 16 while further deforming the detection piece 21 by opening. As a result, the detection portion of the detection piece 21 is restored when it reaches the surface of the guide groove 16 opposite to the retainer mounting surface 14 and is elastically locked to the same surface. Thus, the retainer 12 is held in the locked position as shown in FIG. 6 and is prevented from returning to the temporary fixing position.

  Further, on the inner surface side of the base portion 13 of the retainer 12, a pair of leg pieces 19 (pipe retaining portions) branched in a bifurcated manner are arranged inside both the detection pieces 21, and extend substantially parallel to the detection piece 21. Yes. The tip of the leg piece 19 waits outside the insertion hole 5 when the retainer 12 is in the temporary fixing position, and allows the pipe P to pass through the retaining flange 1. When the retainer 12 moves to the lock position, the inner surfaces of both leg pieces 19 are engaged with the rear surface of the retaining flange 1 to prevent the pipe P from coming off.

  In addition, both leg pieces 19 are formed thinner than the detection piece 21, and in this embodiment, the rear surface sides of the both leg pieces 19 are arranged so as to be substantially flush with each other, and when the retainer 12 reaches the locked position, The piece 19 does not interfere with the transition stopper portion 23. In addition, a concave groove 30 is formed in the base portion of these leg pieces 19 so that when the retainer 12 moves to the lock position, the partition piece 17 can be fitted and interference with the partition piece 17 can be avoided.

  The checker 15 is disposed so as to face the retainer 12, is disposed so as to sandwich the retainer 12 inside, and further has a loop-shaped operation piece 31 extending on an extension line of the detection piece 21. Both ends of the operation piece 31 are connected to the tips of the detection pieces 21, that is, the outer surface of the portion where the detection unit 22 is provided, through a thin connection portion 26 that can be broken. Further, a pair of latching portions 32 are formed to project outward in the width direction at positions corresponding to the connection portions 26 on the outer surface of the operation piece 31. When the retainer 12 is in the temporary fixing position, the both latching portions 32 are engaged with both the locking projections 25 to remove the checker 15 (in the direction indicated by the arrow S in FIG. 8, thus this direction indicates that the retainer 12 is moved from the temporary fixing position. The direction of movement to the lock position is the same). However, when the pipe P is inserted to the insertion hole 5 to the normal depth, the detection pieces 21 are both deformed as described above, but the latching portion 32 is also moved radially outward in conjunction with this. Deviation and dissociation from both locking projections 25. As a result, the checker 15 can be operated in the extraction direction.

  Further, a posture holding portion 33 is formed to protrude from the inner surface side of the operation piece 31 and above the connection portion 26 (in the direction of the top of the loop). The posture holding portion 33 is inserted into the guide groove 16 when the retainer 12 is in the temporary fixing position. Further, the width dimension of the posture holding portion 33 is set to be substantially equal to or slightly smaller than the groove width of the guide groove 16, and thereby the entire checker 15 can be restricted from being tilted. This is because if such a tilting posture is allowed at the temporary fixing position, there is a concern that the connecting portion 26 may be broken by repeated tilting.

  Further, while the checker 15 is operated in the extraction direction and the retainer 12 is moved from the temporarily fixed position to the locked position, a part of the tip of the posture holding portion 31 enters the guide groove (see FIG. 5). During this time, the operation piece 31 is restricted from being tilted.

  It should be noted that the breaking strength of the connecting portion 26 is such that it does not break during the operation of bringing the retainer 12 from the temporarily fixed position to the locked position, and the contact surface 27 of the retainer 12 at the locked position is the retainer mounting surface 14. Depending on the pulling operation of the operation piece 31 after coming into contact with the surface, it can be broken.

  The effect of Embodiment 1 comprised as mentioned above is demonstrated. The pipe P / tube T connection site is loaded with the retainer 12 with the checker 15 assembled to the pipe joint body 2 at the temporarily fixed position. When the retainer 12 is in the temporarily fixed position, the retainer 12 is stopped by the locking of the detecting portion 22 with the drop-off stopper portion 28, and the retainer 12 is inadvertently moved to the locked position by being locked with the transition stopper portion 23. It is also regulated. Further, in the checker 15, since the posture holding portions 33 are fitted in the guide grooves 16 and the tilting operation is restricted, a situation in which the connecting portion 26 breaks in advance is avoided as much as possible. Thus, the pipe joint can be carried into the connection site in the desired state.

  At the connection site, the pipe P is first addressed to the entrance of the insertion hole 5 of the pipe joint body 2 and pushed in as it is. Then, the retaining flange 1 of the pipe P is pushed into the back while being in sliding contact with the hole wall of the insertion hole 5. At the temporary fixing position, the both leg pieces 19 of the retainer 12 stand by outside the passing area of the retaining flange 1 in the insertion hole 5 as described above, so that the retaining flange 1 does not interfere with these leg pieces 19. Absent. However, since both of the detection pieces 21 have the expansion guide surface 29 of the detection unit 22 inserted into the insertion hole 5, when the retaining flange 1 is brought into sliding contact with the expansion guide surface 29, the inclination of the guide surface 29 is caused. Both detection pieces 21 are deformed to open. When the pipe P is inserted to the normal depth in the insertion hole 5, the detection portion 22 is retracted outward from the insertion hole 5 and engaged with the transition stopper portion 23 due to the open leg deformation state at this time. The stop is released (state in FIG. 5). Since both end portions of the operation piece 31 are also expanded and deformed in accordance with the deformation of the detecting piece 21 by the opening leg, both the latching portions 32 are separated from the locking projections 25 and the locking of both is released. In the state of FIG. 5, when the loop-shaped apex portion of the operation piece 31 is picked and pulled in the S direction shown in FIG. 8, both detection pieces 21 are further expanded by sliding contact with the tapered surface 24 of the outer surface of the transition stopper portion 23. Then, it moves in the pulling direction of the operation piece 31 while sliding on the bottom surface of the guide groove 16. And when the detection part 22 adapts to the upper surface (surface on the opposite side to the retainer mounting surface 14) of the pipe joint main body 2, it returns to a closed leg direction and latches on the same surface. As a result, the retainer 12 reaches the lock position and is held in a state of being prevented from being detached from the pipe joint body 2. When the locking position is reached, the both leg pieces 19 of the retainer 12 enter the insertion hole 5 and engage with the rear surface of the retaining flange 1, so that the pipe P is prevented from coming off.

  The retainer 12 reaches the locked position as described above by the pulling operation of the operation piece 31 of the checker 15, but when the operation piece 31 is further pulled thereafter, the latching portion 32 of the checker 15 is dissociated from the locking projection 25. Since the contact surface 27 and the retainer mounting surface 14 are in contact with each other, the retainer 12 can cause a pulling operation force to act on the connecting portion 26 to cause breakage.

  By the way, if the pipe P is not inserted into the insertion hole 5 to the normal depth, the detection piece 21 is not sufficiently expanded or not at all. Therefore, even if the operation piece 31 of the checker 15 is pulled, the pulling force is received by the locking portion between the latching portion 32 and the locking projection 25 to lock the retainer 12. Not only can it be moved to the position, but also the connection part 26 cannot be broken, so that the operator can immediately know that the pipe P is in a semi-inserted state because the checker 15 cannot be removed, The user is prompted to redo the work of inserting the pipe P.

  Thus, the operator can reliably detect the half-insertion of the pipe P by checking whether or not the checker 15 can be extracted. In Embodiment 1, since the retainer 12 and the checker 15 are integrated by the connection part 26 in the state in which a pipe joint is carried in to a connection field, the number of parts can be reduced rather than before. In addition, in the first embodiment, the retainer 12 can be guided to the locked position by the pulling operation of the checker 15, and the checker 15 can be pulled out by the operation in the same direction. That is, since the retainer 12 can be locked and the checker 15 can be removed by a one-way operation on the checker 15, an effect of excellent workability can be obtained.

<Embodiment 2>
Next, a second embodiment of the present invention will be described with reference to FIGS. In the first embodiment, the operation direction with respect to the checker 15 and the movement direction of the retainer 12 from the temporary fixing position to the lock position are the same, but in the second embodiment, this is the opposite direction. . The second embodiment will be described below, but the same structure as that of the first embodiment is denoted by the same reference numerals and the description thereof is omitted.

  The pipe joint body 2a is basically the same as that of the first embodiment, and the position of the locking projection 25a is slightly shifted from the center in the height direction of the flange edge 10 and the overhang edge 11 toward the retainer mounting surface 14 side. It is different in the arrangement. In addition, a downwardly inclined guide slope 34 is formed on the upper surface side of both the locking projections 25a, and when the retainer 12a with the checker 15a is attached to the pipe joint main body 2a at the temporary fixing position, the movement operation of the latching portion 32 is smooth. To be made. However, the lower surface side is a horizontal plane so that the latching with the latching portion 32 is ensured.

  About the retainer 12a, the relief protrusion 35 is each protrudingly formed in the center part of the height direction of the outer surface of both the detection pieces 21. As shown in FIG. The escape protrusion 35 plays a role of preventing the latching portion 32 from interfering with the locking protrusion 25a during the extraction operation of the checker 15a, which will be described in detail later. The relief projection 35 is formed with an inclined surface 36 that is inclined upward along the direction of extraction of the checker 15a, and when the retainer 12a is in the temporary fastening position, the relief projection 35 is above the locking projection 25a (see FIG. 12), when the retainer 12a is moved to the locked position, it is located adjacent to the lower side of the locking projection 25a (see FIG. 14). Further, in this embodiment, the escape projection 35 is located outward from the locking projection 25a. It is formed so that the protruding height to

  In the first embodiment described above, the contact surface 27 formed on the inner surface of the base portion 13 of the retainer 12 serves as a contact surface with respect to the pipe joint main body 2 and plays the role of resisting removal of the checker 15. Then, since the detection part 22 of the detection piece 21 resists extraction force by latching to the pipe joint main body 2 (refer FIG. 14), the inner surface of the detection part 22 will be a contact surface said to this invention.

  Regarding the checker 15 a, unlike the first embodiment, the retainer 12 a is arranged inside the loop formed by the operation piece 31. In addition, posture holding portions 33 a are formed inwardly on the inner surfaces of both ends (lower than the latching portion 32) of the operation piece 31. A taper-shaped sliding contact surface 37 is formed on the upper surface of the posture holding portion 33a (the surface on the side in which the checker 15a is removed), and is in sliding contact with the inclined surface 36 of the relief projection 35 when the checker 15a is pulled. The climbing operation on the escape protrusion 35 is smoothly performed so that the interference between the latching portion 32 and the locking projection 25a can be surely avoided.

  The effect of Embodiment 2 comprised as mentioned above is demonstrated. First, the pipe P is inserted into the insertion hole 5 when the retainer 12a is in the temporary fixing position. When the pipe P is inserted to the normal depth, the detection piece 21 is expanded, and the engagement between the detection portion 22 and the transition stopper portion 23 is released (state in FIG. 13). In this state, the operator presses the upper surface of the base portion of the retainer 12a and pushes it together with the checker 15a toward the pipe joint body 2 side. Then, when the detection part 22 comes into sliding contact with the outer surface of the transition stopper part 23 and reaches the lock position, the detection piece 22 returns and the detection part 22 is elastically locked to the lower surface of the pipe joint body 2. At this time, as shown in FIG. 14, both leg pieces 19 are engaged with the rear surface of the retaining flange 1 to prevent the pipe P from coming off. Further, as the retainer 12a shifts from the temporarily fixed position to the locked position, the relief protrusion 35 moves from the upper position of the locking protrusion 25a to the position adjacent to the lower position.

  When the retainer 12a is moved to the lock position, the operation piece 31 of the checker 15a is pulled. At this time, the latching portion 32 is in a state of being separated below the locking projection 25a, and the retainer 12a is in a state in which the detecting portion 22 is locked to the lower surface of the pipe joint body 2a. Can act directly. As a result, the connecting portion 26 is broken, and the checker 15a is pulled up while the retainer 12a remains in the locked position. At this time, since the posture holding portion 33 a is in sliding contact with the inclined surface 36 of the escape projection 35, the posture holding portion 33 a rides on the escape projection 35 while gradually expanding both ends of the operation piece 31. As a result, it is possible to reliably avoid a situation in which the latching portion 32 is locked again with the locking projection 25a during the extraction operation of the checker 15a, and therefore the extraction operation of the checker 15a can be performed smoothly. Become.

  As described above, also in the second embodiment, unless the pipe P is inserted to the normal depth, the retainer 12a cannot be moved from the temporarily fixed position to the locked position. Therefore, the latching portion 32 is locked by the locking protrusion 25a. Therefore, the connecting portion 26 of the checker 15a cannot be broken, and the checker 15a cannot be pulled out, so that the operator can know the half-insertion of the pipe P.

  Note that when the retainer 12a is in the temporary fixing position, the posture holding portion 33a is deeply inserted into the guide groove 16, and the tilting of the checker 15a is not allowed, so that the connecting portion 26 may be inadvertently broken. The absence is the same as in the first embodiment.

<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.

  (2) The pipe joint main body does not need to be a straight type as in both embodiments, and may be a form bent 90 degrees between the tube connection side and the pipe connection side.

Front sectional view of the pipe joint main body in the first embodiment Top view of the fitting body Front view of the fitting body Side sectional view of the pipe joint when the retainer is in the temporary fixing position Side sectional view showing the state when the pipe is inserted to the normal depth Side sectional view showing the state when the retainer is moved to the locked position Side sectional view showing the state where the checker is removed from the retainer Front view showing the locking state between the latching portion and the locking projection Front sectional view showing the pipe inserted to the normal depth when the retainer is in the temporary stop position Front sectional view showing the state when the retainer is moved to the locked position Sectional view showing the situation after the checker is pulled out and seen from a direction 90 degrees different from FIG. The sectional side view of the pipe joint which shows the state before pipe insertion in Embodiment 2. Side sectional view showing a state where the pipe is inserted to the normal depth when the retainer is in the temporary fixing position. Side sectional view showing the retainer pushed into the locked position Side cross-sectional view showing the state when the posture holding part gets on the escape protrusion Side sectional view showing the state where the checker is removed from the retainer Front view showing the locking state between the latching portion and the locking projection

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Retaining flange 2, 2a ... Pipe fitting main body 5 ... Insertion hole 12, 12a ... Retainer 15, 15a ... Checker 16 ... Guide groove 20 ... Window part 21 ... Detection piece 22 ... Detection part (contact surface)
23 ... Transition stopper portion 25, 25a ... Locking projection 26 ... Connection portion 27 ... Contact surface (contact surface)
32 ... Hook 33, 33a ... Posture holder 35 ... Relief protrusion

Claims (5)

An insertion hole into which a pipe having a retaining flange can be inserted is formed along the axial direction, and a pipe joint body in which a window portion communicating with the insertion hole is formed on the side surface;
Between the pipe joint is assembled to the main body engaged with the temporarily fixed position and the stopper flange to allow insertion of the pipe into the insertion hole of the lock position for retaining the pipe, the axis of the insertion hole A retainer movable in a direction intersecting the heart,
A pipe joint comprising a checker for detecting whether or not the pipe is inserted to a normal depth with respect to the insertion hole,
The retainer is
The base,
A pipe retaining portion that is formed on the base and waits at a position where the pipe can be inserted into the insertion hole at the temporary retaining position, and is latched to the rear surface of the retaining flange at the locking position;
The base portion is provided so as to be able to bend and deform, and has a detection portion at the tip portion, and at the temporary fixing position, the detection portion is formed into the insertion hole through the window portion and formed in the window portion. The retainer is held at the temporarily fixed position so as not to move to the locked position by being engaged with a stopper portion. When the pipe is inserted into the insertion hole to a normal depth at the temporarily fixed position, the detection is performed. The locking flange is slidably contacted with the guide surface formed on the portion, so that the detecting portion is deformed to be pushed out from the insertion hole, and the locking between the detecting portion and the stopper portion is released. A detection piece for allowing the retainer to move from the temporary fixing position to the locking position, and locking the pipe fitting body at the locking position to prevent the retainer from returning to the temporary fixing position;
A contact surface that is formed on the base and contacts the pipe joint body at the locked position and restricts movement of the retainer beyond the locked position;
The checker is
An operation piece for performing a pulling operation;
A connecting portion provided on the operation piece and connected to the retainer in a breakable manner;
Both the pulling operation of the operation piece and the breakage of the connection portion are made impossible by engaging with a locking portion formed on the pipe joint body at the temporary fixing position provided on the operation piece, but together with the retainer By moving to the lock position, the lock with the lock portion is released, and the operation piece is pulled at the lock position to break the connection portion and separate the checker from the retainer. A pipe joint comprising a latching portion that enables the pipe joint.   On the outer peripheral surface of the pipe joint main body, a guide portion is provided along the checker removal operation direction, and the checker is fitted with the guide portion at least in the temporary fixing position to maintain the posture of the checker. The pipe joint according to claim 1, wherein a posture holding portion is formed. The retainer while being movable to said locked position by pushing operation from the temporary bonding position, the checker has a loop of said operation piece, such as placing the retainer on the inside, pushing the retainer The pipe joint according to claim 1 , wherein the pipe joint can be extracted in a direction opposite to the direction. While the checker with the operating piece formed in a loop shape, said retainer is disposed on the outside of both ends connected to and loops of the loop, the moving direction to the lock position from the tacking position of the retainer The pipe joint according to claim 1 or 2 , wherein the operation piece is in the same direction as the operation direction for extracting the operation piece. 4. The pipe joint according to claim 3 , wherein the guide portion is a guide groove formed along a moving direction of a retainer in the pipe joint body, and the locking portion is formed at an opening edge of the guide groove. The posture is formed to protrude outward, while the end of the operation piece of the checker protrudes outward in the width direction of the operation piece and the inner surface of the operation piece to fit into the guide groove With a holding part,
Further, the detection piece of the retainer is fitted in the guide groove and can be moved along the guide groove, and an outer surface of the detection piece is provided with an inclined surface which is inclined upward along the extraction direction of the checker. When the retainer is in the temporarily fixed position, the escape protrusion is positioned higher than the locking portion in the checker extraction direction, and when the retainer is in the locked position, the locking protrusion is formed. Since the position holding unit rides along the inclined surface when the checker is pulled out, the interference between the latching part and the locking part is caused by being positioned lower than the position and higher than the position holding part. A pipe joint characterized in that it is configured to be avoidable.

Images