JPH11280974A - Structure to confirm state to assemble pipe to connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To confirm whether a pipe is reliably assembled to a connector. SOLUTION: When a pipe is assembled to a connector 1 by locking a slip-off stop part of a pipe inserted in the lock claw 32 of a clip 30 protruded in the pipe insertion part of the connector 1, a checker 40 is interposed to confirm an assembly state between the pipe and the connector. A so formed structure consists mainly of a clip having a hook insertion part 34; a clip fit-in part having a window part 17 for a hook; and a checker having a hook part 44. In the checker, the hook part inserted in and engaged with a hook insertion part and a window part for a hook is formed in a protruding manner on a checker body part 41 rotatably in the radial direction of the body of the connector. Two leg parts 43 to hold a hook part inserted in a hook window part for a hook are removably arranged at the outer peripheral part of a checker body part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for confirming a pipe assembly state in a connector, and more particularly, to whether or not a pipe (usually referred to as a pipe) assembled to a connector is correctly assembled. It relates to a confirmation structure that can be confirmed.

[0002]

2. Description of the Related Art Conventionally, a connector has been used for connecting a pipe to a hose, such as a fuel pipe and a fuel hose in an automobile, and this type of connector is disclosed in, for example, Japanese Patent Application Laid-Open No. Hei 8-233181.

As shown in FIGS. 19 and 20, a connector 100 includes a hose connection portion 101 and a pipe insertion portion 10.
2 and a clip 120 for fastening the pipe P inserted into the pipe insertion portion 102 to the body 110
And

[0004] The body 110 is formed in a hollow cylindrical shape, and is formed in a step shape in which the outer diameter decreases from the mouth (entrance) of the pipe insertion portion 102 toward the back. The small diameter end of the body 110 is a hose connection portion 101. An outer peripheral surface of the pipe insertion portion 102 is a clip fitting portion 103. A stop hole 104 is formed in the clip fitting portion 103. The clip 120 is, as shown in FIG.
Both ends are separated and formed into an annular shape to be fitted to the clip fitting portion 103, and as shown in FIGS. 19 and 20, a locking claw 121 inserted into the stop hole 104 of the clip fitting portion 103.
have. Reference numeral 122 denotes a knob of the clip 120.

[0005] As shown in FIG. 19, the pipe P is inserted into the pipe insertion portion 102 from the opening side, and the stopper 130 of the pipe P exceeds the locking claw 121 of the clip 120, and is placed on the inner side of the locking claw 121. It is engaged and inserted (see the phantom line in FIG. 20).

When the inserted pipe P is to be removed, the locking claw 121 is retracted into the stop hole 104 or the peripheral surface of the clip fitting portion 103 by operating the clip 120 knob 122 and then easily removed. obtain.

[0007]

However, in the above-described conventional connector 100, the pipe P is inserted into the pipe insertion portion 102, the stopper 130 of the pipe P is locked by the locking claw 121, and the pipe P is connected to the connector 100. At the time of assembling, it was not possible to confirm that the pipe P was securely attached.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a structure for confirming a pipe assembly state of a connector, wherein the pipe assembly state can be confirmed whether or not the pipe has been securely assembled to the connector. It is in.

[0009]

According to a first aspect of the present invention, an annular clip having a locking claw is fitted to a clip fitting portion of a connector having a stopper hole. When the pipe is inserted into the connector, the check is interposed to check the assembled state of the pipe and the connector. A clip having a hook insertion portion, a clip fitting portion having a hook window portion, and a checker having a hook portion. The checker is inserted into the hook insertion portion and the hook window portion. An engaging hook portion is formed on the checker body so as to be rotatable in the body radial direction of the connector, and the checker body has two legs for holding the hook inserted into the hook window. It is configured to be detachably provided on both sides of the hook part with respect to the outer peripheral part of the body, and the clip is turned radially outward by the stopper of the pipe inserted into the connector, and the hook part of the checker is turned outward. By rotating, the engagement between the hook portion and the hook window portion of the connector is released.

According to the first aspect of the present invention, when the pipe is inserted into the pipe insertion portion, the stopper of the pipe abuts against the locking claw of the clip and pushes the locking claw to open the clip in the radial direction. I do. When the clip is expanded, the wall surface forming the hook insertion portion of the clip pushes the hook portion of the checker outward, and the engagement portion at the tip of the hook portion disengages from the checker window. When the pipe is assembled to the pipe insertion portion while being locked by the locking claw, the hook is disengaged from the checker window and the checker can be easily removed.

[0011] According to another aspect of the present invention, there is provided a computer system comprising:
The invention of claim 1 is characterized in that, in the invention of claim 1, holding means for holding the checker is formed on the body of the connector.

According to the second aspect of the present invention, the checker having the hook portion inserted into the connector is stably held by the holding means. When the pipe is inserted into the pipe insertion portion of the connector, the clip is expanded in the radial direction as in the case of claim 1, and the wall forming the hook insertion portion of the clip faces the hook portion of the checker outward. Push to release the engagement of the engagement portion at the tip of the hook portion with the checker window.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to FIGS. As shown in FIGS. 2A and 4, the connector 1 of the present embodiment is a cylindrical body 1.
0 and a clip 30 for locking the pipe P to the body 10.

As shown in FIG. 4, the pipe P is provided with a flange-shaped stopper 130 on the outer surface on the insertion side.
A pipe having the same structure as the conventional one is used. The retainer 130 has a front surface (tip side) 130A that is tapered forward.
The rear surface 130B is formed in the shape of an upright surface serving as a locking surface.
The retainer 130 is formed at a position having a certain length from the tip on the insertion side.

The body 10 has a hose connecting portion 11 for connecting a hose H at one end side as shown in FIGS.
And a pipe insertion part 1 for inserting a pipe P on the other end side.
Two. The pipe insertion portion 12 has a predetermined diameter on the inlet side having a large diameter into which the stopper 130 of the pipe P can be inserted, and a small diameter into which the tip of the internal pipe P can be inserted. The inner part of the pipe insertion part 12 communicates with the small-diameter through-hole part 13 of the hose connection part 11. A sealing member 14 such as an O-ring for tightly fitting the inserted pipe P is fitted inside the large-diameter deep portion of the pipe insertion portion 12.

An outer peripheral portion on the inlet side of the pipe insertion portion 12 is formed as a clip fitting portion 15 for fitting the clip 20, and as shown in FIG. I have. At a predetermined opposing position in the clip fitting portion 15, a locking hole 16 into which a locking claw 32 described later is inserted.
A, 16B and a hook portion 44 of the checker 40 described later
Is inserted through a window 17 for a hook.

As shown in FIG. 2, the hook window 17 is located at a position corresponding to the back side of the one stop hole 16A, that is, at a position near a notch 19 of a flange 18 described later.
In addition, the stopper 1 for the pipe P locked on the pipe insertion portion 12
It is formed at a site corresponding to 30. In this embodiment, it is formed continuously to the inner side of the stop hole 16A. The hook window 17 is a side that comes into contact with the claw 45 so that the claw 45 of the hook 44 can be easily inserted and the claw 45 can be easily engaged when the hook 44 of the checker 40 described later is inserted. The wall portion (the left side in FIG. 9A) has an oblique engagement wall portion 17.
A. The hook window 17 is provided with a stop hole 16.
A is smaller than A and does not hinder the function of the stop hole 16A. The hook window 17 is provided in only one stop hole 16A.

As shown in FIGS. 2A and 3B, a radially protruding flange portion 18 is formed on the inner side of the clip fitting portion 15 in an arc shape along the outer peripheral surface. I have. A predetermined portion of the flange 18 is a notch 19. The notch 19 is a moving range of a rib piece 33 of the clip 30 described later. The end of the flange 18 near the hook window 17 is a wide stop 18A.
Note that the stopper 18A serves as a stopper for the rib piece 33 (described later) that moves the notch 19. The side surface of the flange portion 18 on the side of the clip fitting portion 15 (the side where the pipe is inserted) is a smooth upright surface that comes into contact with the side surface of the clip 30.

A second flange 21 protruding in the radial direction of the body 10 is formed inside the body 10 at a predetermined distance from the flange portion 18 (in the pipe insertion direction).
The second flange 21 is formed at the same height as the flange 18 along the outer periphery of the body 10. The second flange 21 helps protect the notch 19 of the flange portion 18 and retains the checker 40.

The flange 18 and the second flange 21 are connected by a locking projection 20. The locking projection 20 is shown in FIG.
(A), as shown in FIG.
7, in the present embodiment, an end of the flange portion 18 that is separated from the hook window portion 17;
It is formed at this symmetrical position. The locking projection 20 serves as a portion for locking a claw piece 43A of a leg 43 of the checker 40, which will be described later.

The flange portion 18 and the second flange 21
The holding pieces 22 are formed at predetermined symmetrical positions with respect to the hook window 17 (see FIG. 3A and FIG. 10). The holding piece 22 has a substantially triangular plate shape with respect to the peripheral surface of the body 10, and serves to hold the checker 40 when the checker 40 is attached to the body 10. The body 10 is integrally formed of a high-strength synthetic resin, for example, 12 nylon blended with glass fiber.

As shown in FIG. 2A, the clip 30 has opposite ends, and is formed in a ring shape having a diameter slightly smaller than or equal to the outer circumference of the clip fitting portion 15 of the body 10,
It is formed of a material having elasticity capable of expanding the diameter. The clip 30 according to the present embodiment is formed in a ring shape with a band having a predetermined width, and opposing ends are formed by notching side edges so that both ends can be inserted into each other.

As shown in FIGS. 1 and 2 (a), a knob 31 is provided on the side of the flange portion 18 of the clip 30, and at a position near the knob 31, for example, at a lower portion of the side surface of the knob 31, A rib 33 is inserted into the notch 19 of the flange 18 and restricts the rotation of the clip 30.

As shown in FIGS. 2A and 4, a clip fitting portion 15 is provided at a predetermined position on the inner peripheral surface of the clip 30.
Into the stop holes 16A, 16B and the pipe insertion portion 1
2 are formed with locking claws 32 projecting therefrom.

As shown in FIG. 6, the clip 33 is positioned at one end of the notch 19 when the locking claws 32 are inserted into the stopper holes 16A and 16B, and the clip 30 is turned. The locking claw 32 is moved to
The rib piece 33 is formed so as to be located at the other end of the notch 19 in a state where the rib piece 33 is returned to the original state by the elastic force that is further retracted and reduced in diameter.

The notch 19 of the flange 18
The rotation of the clip 30 fitted to the clip fitting portion 15 of the body 10 is regulated by the rib piece 33 of the clip 30. Normally, the clip 30 is held at a predetermined small diameter, and when the diameter is expanded, the clip 30 returns to the small diameter by elasticity.

The clip 30 has a knob 31 at at least one end, and the clip 31 is rotated at the clip fitting portion 15 by the knob 31. Since the rib piece 33 is provided at the same level position as the knob 31 or in the vicinity of the knob 31, the movement amount of the knob 31 due to the turning operation can be increased.

As shown in FIG. 2B, the locking claw 32 has a front surface 32A whose rear surface 130
B can be locked, and the rear surface 32B of the locking claw 32
Has a tapered surface with an open rear to allow the insertion of the stopper 130 of the pipe P. The protruding length of the locking claw 32 is set to a length capable of locking the stopper 130 of the pipe P in the pipe insertion portion 12.

The shape of the locking claw 32 in the inner circumferential direction of the clip 30 is, as shown in FIG. 7 (b), a vertical upright surface 32C and a lower end curved surface 32D of a concave curved surface corresponding to the outer peripheral surface of the pipe P.
(It is not limited to a curved surface.) And a slanted side surface 32E facing the inner peripheral surface is formed.

As shown in FIG. 1 and FIG. 2A, a notch-formed hook insertion portion 34 is provided at a peripheral portion on the back side of the clip 30 corresponding to the locking claw 32 near the knob 31 of the clip 30. Is provided. The other locking claw 32
No hook insertion part 34 is provided on the side. When the clip 30 is fitted to the clip fitting portion 15, the hook inserting portion 34 is located at a position corresponding to the hook window 17 of the clip fitting portion 15. Note that the hook insertion portion 34 may be a through hole. The clip 30 is formed of a synthetic resin such as nylon 12, and has an elasticity that can be expanded by turning the knob 21.

The checker 40 is, as shown in FIG.
The main structure is that the main body 41 is provided with an operation section 42, a leg section 43, and a hook section 44. The main body 41 is a horizontal horizontal support plate 41.
A flat plate portion 41B that is vertically oriented to A is joined at a right angle, and an arc-shaped operation portion 42 is formed on the horizontal support plate 41A. The operation unit 42 has a work hole 42A for work.
It has been. Legs 43 are provided on both left and right sides of the vertical plate portion 41B. As shown in FIG. 10, both leg portions 43 cover both holding pieces 22 of body 10 and have step portions 43A.
The claw piece 43B is formed so as to be removably engageable with the locking projection 20 via the.

As shown in FIG. 1, an L-shaped elastic piece 41C is formed below the lower surface of the horizontal support plate 41A at one end (left end in the figure) of the front part of the horizontal support plate 41A. 41
A hook portion 44 extending downward is formed at the center of C. A hook 45 is provided at the lower end of the hook 44.

As shown in FIG. 9 (a) and the like,
When the tip is inserted into the hook window 17, the engaging wall 17
A, and the lower surface of the claw portion 45 is engaged with the engaging wall portion 1.
A tapered surface 45A is provided to facilitate insertion into 7A. The hook portion 44 engages the claw portion 45 with the hook window portion 17 via the hook insertion portion 34, so that the checker 40
The claw portion 45 is formed at a position where the claw portion 45 comes into contact with or comes close to the engagement wall portion 17A of the hook window portion 17 when the body is mounted on the body 10. That is, as shown in FIG. 9 (c), the claw portion 45 of the hook portion 44 inserted along the slope of the engaging wall portion 17A of the hook window 17 is engaged with the engaging wall portion 17A. obtain. 9 (b) and FIG.
As shown in the figures, the front surface of the claw portion 45 is formed as a tapered surface 45B through which the stopper 130 of the pipe P can easily pass.

As shown in FIG. 1, an L-shaped receiving piece 41D is provided on the L-shaped elastic piece 41C below the lower surface of the horizontal supporting plate 41A at the other end (right end in the drawing) of the front portion of the horizontal supporting plate 41A. Is formed. The L-shaped receiving piece 41D is arranged so as to be able to support the free end of the L-shaped elastic piece 41C, as shown in FIGS. The rotation of the motor 30 in the traveling direction (the direction of arrow B in FIG. 9A) is permitted, and the rotation of the motor 30 in the reverse direction is prevented.

Thus, the clip fitting portion 1 of the body 10
5, the clip 30 is fitted in a state in which the rib piece 33 is located in the notch 19 and the locking claw 32 is engaged with the stop holes 16A and 16B, thereby forming the connector 1 (FIG. 1). ,
(See FIG. 4). The fitted clip 30 is shown in FIG.
As shown in (b), the hook insertion portion 34 of the clip 30
Is in a state corresponding to the hook window 17 of the clip fitting portion 15.

Next, the checker 40 is mounted on the connector 1. Assembling of the checker 40 is as shown in FIG.
As shown in (b), the hook insertion portion 34 of the clip 30
From the hook window portion 17 of the clip fitting portion 15
Is inserted into the engaging wall portion 17A of the window portion 17 for hooks.
5 is engaged. The engaging wall portion 17A has an inclined surface so that the claw portion 45 can be easily inserted. In addition, both legs 43 of the checker 40 are inserted into the body 10 so as to sandwich the body 10 together with the engagement of the claw portions 45, and the claw pieces 43A of the both leg portions 43 are respectively engaged with the locking projections 20 (see FIG. 10). . In this state, as shown in FIG. 10, the lower side of the vertical plate portion 41B of the checker 40 and the upper inner surfaces of the leg portions 43 are the body 1
The checker 40 contacts the holding piece 22 of the
Are held at right angles to For this reason, the checker 40 attached to the body 10 is the left (L) in FIG.
Even if the operation unit 42 is moved in the right (R) direction, it does not rattle and does not come off.

As shown in FIGS. 1 and 9 (b) and the like, the upright flat plate portion 41 B and both leg portions 43 are inserted between the flange portion 18 and the second flange 21.
As shown in (b), the rattle of the attached checker 40 in the front (H) and rear (G) directions is prevented.
The checker 40 is stably held in the front-back direction. When assembling the checker 40 to the body 10,
Since the engagement of the claw pieces 43A is regulated by the step portions 43B of the leg portions 43, the claw portions 45 of the hook portions 44 of the checker 40 are controlled.
Is not pushed too far into the hook window 17.

As shown in FIG. 9 (a), the hook window 1
The hook 45 of the hook 44 with respect to the hook 7
Of the checker 4 in the direction of arrow D through the working hole 42A of the operating section 42.
Even if 0 is pulled, it cannot be detached from the connector 1. The connector 1 with the checker 30 attached is supplied to the work site.

At the work site, a pipe P
Is assembled. Now, as described above, the checker 40 engages the connector 1 with the claw portion 45 of the hook portion 44 engaged with the engaging wall portion 17A of the hook window portion 17 and the two leg portions 43 engaged with the locking projection 20. Has been.

Thus, the pipe insertion portion 12 of the connector 1
, A pipe P is inserted. As shown in FIG. 11, the front surface 130 </ b> A of the stopper 130 of the inserted pipe P contacts the rear surface 32 </ b> B of the locking claw 32. The front surface 130A of the retaining stopper 130 has a tapered surface that is pointed forward, and
The rear surface 32B is formed as a tapered surface with an open rear, so that when the pipe P is pushed in, the clip 30 is pushed out through the locking claw 32 and the pipe P is prevented from coming off.
When the clip gets over the locking claw 32, as shown in FIG. 4, the locking claw 32 returns into the pipe insertion portion 12, and the clip 30 returns to a state in which the clip 30 is fitted to the clip fitting portion 15.

On the other hand, as shown in FIG. 11, the insertion of the pipe P causes the locking claw 32 to spread outward (in the direction of arrow I). FIGS. 13A and 13B show cross sections taken along line IX-IX in FIG. 1 at that time. That is, the side surface of the hook insertion portion 34 of the clip 30 moves from the state of FIG. 13A to the state of FIG. Next, as shown in FIG. 14A, the pipe P is further inserted into the connector 1, and the hook portion is a cross-sectional view of the body 10 in a right angle direction in a state immediately before the stopper 130 crosses over the locking claw 32 of the clip 30. 44 is in the state shown in FIG.

The hook 44 is shifted from the state shown in FIG.
Further, since the side surface of the hook insertion portion 34 of the clip 30 pushes the hook portion 44, the hook portion 44 bends in the direction of arrow B,
It is removed from the hook window 17. In addition, this hook part 4
In the state of 4, the disengagement of the hook 45 from the hook window 17 starts. In this state, the checker 40 cannot be removed.

Next, the stopper 130 of the pipe P is
The state in which the number 2 is completely exceeded is as shown in FIGS. Since the claw portion 45 of the hook portion 44 is provided with the guide surface 45A of the inclined stopper 130, the stopper 130 of the pipe P is guided by the tapered surface 45B and
5 and lifts the claw portion 45, that is, the hook portion 44, upward (outward). At this time, the state of the body 10 viewed from a right-angle cross section is as shown in FIG.

The pipe P inserted in FIG.
Of the L-shaped elastic piece 41C in the direction of arrow C to be inclined, and the claw 45
Is kept detached from the hook window 17. In the checker 40 in this state, the claw portion 45 of the hook portion 44 is in a free state, and the claw pieces 43A of the two leg portions 43 are
0, the checker 40 is inserted into the operation hole 42.
The checker 40 can be removed from the connector 1 by pulling in the direction of arrow D by the operation of A. Of course, in this case, the pipe P is
0 is securely locked by the locking claw 32, and the assembly of the pipe P to the connector 1 is ensured.

It is assumed that the pipe P is the locking claw 32 of the clip 30.
In the state shown in FIG. 14A in which the checker 40 is not crossed, even if the checker 40 is pulled in the direction of arrow D, the checker 40 does not come off because the hook portion 44 is engaged with the hook window 17 of the connector 1. Therefore, it can be confirmed whether or not the pipe P is mounted on the pipe insertion portion 12 of the connector 1 by checking whether the checker 40 mounted on the connector 1 can be removed from the connector 1.

The insertion portion of the pipe P and the body 10 are sealed by the seal member 14 of the pipe insertion portion 12. A predetermined hose H is connected to the hose connection portion 11 of the body 10 in a state where the clip 30 is attached to the body 10.

On the other hand, when removing the pipe P connected to the connector 1, the user pushes the knob 21 of the clip 20 to move the rib piece 33 to the other end position of the notch 19 as shown by the phantom line in FIG. Is rotated to engage the locking claw 32 with the pipe insertion portion 12.
Evacuate more.

That is, by operating the knob 31, the clip 33 shown in FIG. 6 is rotated from one end of the notch 19 to the other end of the clip 30, and the knob 31 is held at that position. The locking claw 32 is retracted from the pipe insertion portion 12 as shown in FIG.
Since the toes of the locking claws 32 remain in the positions A and 16B, the pipe P can be easily pulled out from the pipe insertion portion 12.

When the knob 31 is released after the pipe P is pulled out, the clip 30 is reduced in diameter and returns to the original position, the rib piece 33 becomes the solid line position of the notch 19 in FIG. As shown in FIG. 4, it is in a state of being inserted into the stop holes 16A and 16B. The clip 30 whose diameter has been expanded to open the pipe insertion portion 12 is automatically reduced in diameter and returns to its original position.

The checker 4 according to the embodiment described above
0 is a horizontal support plate 41A of the main body 41 as shown in FIG.
The hook portion 44 is formed on the L-shaped elastic piece 41C, and the hook portion 44 can be moved in the direction of the arrow L, and the movement in the anti-L direction is regulated by the L-shaped receiving piece 41D. Is not limited to this structure. For example, the L-shaped elastic piece 41C and the L-shaped receiving piece 41D in FIG. 16 are connected as in a checker 40 shown in FIG. It may have a structure that can move in any direction.

Further, both legs 4 of the checker 40 described above.
3 is a locking projection 20 of the body 10 as shown in FIG.
The two legs are not limited to this configuration. For example, the checker 4 shown in FIG.
As shown in FIG. 0, it is also possible to form the leg 43 so as to hold the body 10 detachably, and omit the locking projection 20.

The connector 1 according to the embodiment described above
As shown in FIG. 2A, the locking claw 32 can be retracted from the pipe insertion portion 12 by the clip 30 in which the rib piece 33 is disposed in the notch portion 19 of the flange portion 18 of the clip fitting portion 15. Although the checker 40 is applied to the connector 1 having the structure, the connector 1 to which the checker 40 is applied is used.
Is not limited to this structure. For example,
With respect to the connector 1 having the clip 30 shown in FIG.
A checker 40 having a structure shown in FIG.

[0053]

According to the first aspect of the present invention, when the pipe is assembled to the connector, the hook of the checker is disengaged and the checker can be easily removed from the connector, so that the pipe can be securely connected to the connector. You can check if it is installed in

According to the second aspect of the present invention, the checker can be favorably held with respect to the connector, so that the hook can be more properly engaged with the pipe in the detaching direction when the pipe and the connector are assembled. Thus, the effect of the first aspect can be more favorably obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a main part on a clip side of a connector and a checker.

2A is a perspective view of a connector body and a clip, and FIG. 2B is a side view of a clip locking claw.

3A is a plan view mainly showing a clip fitting portion side of the connector, and FIG. 3B is an enlarged sectional view of a large-diameter portion of the body.

FIG. 4 is a cross-sectional view in the longitudinal direction of the connector and a shape diagram of an insertion side of a pipe.

5A is a left side view of the connector on the clip side, and FIG. 5B is a right side view of the same.

FIG. 6 is a plan view of a connector near a clip knob.

FIG. 7A is a diagram showing a state in which a locking claw projects from a stopper hole.
(B) is a front view of the locking claw.

FIG. 8 is a view showing a state in which a locking claw of the clip is retracted from a stopper hole of the clip fitting portion by rotation of the clip.

9A is a cross-sectional view taken along line IX-IX of FIG. 1 when a checker is attached to the connector, FIG. 9B is a side cross-sectional view of the same, and FIG. FIG.

FIG. 10 is a sectional view taken along line XX of FIG. 1 when a checker is attached to the connector.

FIG. 11 is a diagram showing the state of the locking claw and the hook portion at the beginning of the pipe insertion process.

FIG. 12 is an explanatory diagram of an operation of a hook in a pipe insertion step.

FIGS. 13A and 13B are action diagrams showing a moving state of a wall surface of a checker insertion hole of a clip when a pipe is inserted.

FIGS. 14A and 14B are action diagrams showing a state in which the stopper of the pipe gets over the locking claw, in which FIG. 14A is a cross-sectional view on the side, and FIG. 14B is a cross-sectional view on the front.

FIGS. 15A and 15B are action diagrams showing a state in which the pipe has passed over the locking claw, wherein FIG. 15A is a cross-sectional view on the side, and FIG.

FIG. 16 is an operation explanatory view of a checker hook portion.

FIG. 17 (a) is a view showing another embodiment of the checker,
(B) is still another embodiment of the checker.

FIG. 18 is a perspective view showing another embodiment of the connector.

FIG. 19 is a perspective view showing a main part of a conventional connector and a pipe for connection.

20 is a sectional view of the conventional connector shown in FIG.

FIG. 21 is a perspective view of a clip in the conventional connector shown in FIGS. 19 and 20.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Connector 10 Body 12 Pipe insertion part 15 Clip fitting part 16A, 16B Stop hole 17 Hook window part 17A Engagement wall part 18 Flange part 19 Notch part 21 Second flange 30 Clip 31 Knob 32 Locking nail 33 Rib piece 34 Hook insertion part 40 Checker 41 Main body 42 Operation part 43 Leg part 44 Hook part 45 Claw part

Claims (2)

[Claims] An annular clip having a locking claw is fitted to a clip fitting portion of a connector provided with a stop hole,
To check the assembling condition of the pipe and connector by interposing a checker when assembling the pipe to the connector by locking the stopper of the inserted pipe with the locking claw protruding from the stop hole to the pipe insertion part Mainly comprising a clip having a hook insertion portion, a clip fitting portion having a hook window, and a checker having a hook portion, wherein the checker is configured to be inserted into the hook insertion portion and the hook window. A mating hook is formed on the checker main body so as to be rotatable in the body radial direction of the connector, and both legs for holding the hook inserted into the hook window are formed on the checker main body. The clip is turned radially outward by the stopper of the pipe inserted into the connector, and is detachably provided on both sides of the hook portion. Pipe assembled state check structure in the connector engagement with the hook portion and the hook window portion of the connector is characterized by comprising been configured to be released by rotating the hook outward. 2. The structure according to claim 1, wherein holding means for holding a checker is formed on a body of the connector.