JP2004211891A - Connector with checker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connector with a checker allowing the easy confirmation of connection without increasing the number of parts and impairing workability for connection. <P>SOLUTION: This connector with the checker comprises a plug 20 connected to one tube end, a socket 40 connected to the other tube end, and a stopper 60 for preventing the extraction of the plug. A plug contact part 64 projecting to the inner periphery of the socket through the cutout groove 53 of the socket is formed in the stopper at a position eccentric from the center of the socket to both end parts 62 of the stopper. Also, a temporarily holding projection 56 engaged with both end parts of the stopper and held by the center part of the stopper in the raised state from the peripheral surface of the socket and a rib 54 disposed adjacent to the center part of the stopper is formed on the socket. When the plug is pressed into the socket with both ends of the stopper engaged with the temporarily holding projection, The plug contact part of the stopper is allowed to abut on the tapered part of the plug and pressed open, and both end parts of the stopper override the temporarily holding projection of the socket. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

  The present invention relates to a connector preferably used for a fluid pipe in an engine cooling system or an intake system of an automobile, for example, and particularly to a connector with a checker having a function of checking whether connection has been made securely.

  For example, when connecting a radiator hose or the like of an automobile, a pipe connector (one-touch connection) is achieved by simply inserting a plug attached to the end of one tube into a socket attached to the end of one tube. Pipe fittings) are widely used.

  As such a connector, for example, Patent Literature 1 below includes a socket, a clamp, and a plug. The socket is formed so that the plug can be inserted, and the clamp is attached to the socket so that the clamp can be pressed. The clamp has a locking portion engageable with the plug, the clamp has elasticity to hold the locking portion in a locked state for engaging the plug, and the clamp is A cam abutting portion is formed on the locking portion of the clamp so as to be elastically deformable in an unlocked state for releasing the engagement of the locking portion, and is located at a free end side opposite to the pressing operation side of the clamp. The socket has a socket-side cam portion on which a cam contact portion of the locking portion slides, and the socket-side cam portion slides on the cam contact portion of the locking portion when the clamp is pressed. By connector, characterized in that to elastically deform the clamp to the unlocked state is disclosed.

Further, in the following Patent Document 2, in a connector having a substantially tubular socket and a retainer, the vicinity of one end of the retainer is constrained in the circumferential direction with respect to the outer periphery of the socket, and a part of the retainer is formed inside the socket groove. The retainer rotates around the restraining part while the circumferential operating force is applied to the retainer, so that the protrusion protrudes into the hole. There is disclosed a connector in which the protruding portion returns to a position and a posture in which the protruding portion protrudes into the inner hole when the operating portion is retracted from the inner hole and the operation force is lost.
JP 2001-289381 A (see claim 1) JP 2002-5375 A (see abstract)

  However, the connectors described in Patent Literatures 1 and 2 are characterized in that a clamp or a retainer is opened by a predetermined operation when releasing the connection of the connector. There is no function to check whether the plug is engaged with the retainer and is securely connected.

  Although some connectors having such a function have been proposed, it is necessary to separately provide parts for confirming the connection, so that the number of parts increases, the manufacturing cost increases, and the connection work is increased. The properties were not good either.

  Therefore, an object of the present invention is to provide a checker-equipped connector capable of easily checking a connection without increasing the number of parts and the like and without impairing the connection workability.

In order to achieve the above object, a first aspect of the present invention comprises a substantially tubular socket attached to one pipe end to be connected, and a substantially tubular plug attached to the other pipe end. A pair of notch grooves are provided on opposing peripheral surfaces, and a stopper having a generally gate shape is mounted on the notch groove, and the plug comes into contact with the stopper when inserted into the socket. A connector in which a tapered portion that gradually pushes and spreads the stopper and a groove or step along the circumferential direction in which the stopper fits are formed.
In the stopper, a plug contact portion protruding toward the inner periphery of the socket through the notch groove is provided at a position offset from the center of the socket toward both ends of the stopper,
The socket is provided with a temporary holding projection that engages with both ends of the stopper to hold the center of the stopper in a floating state from the peripheral surface of the socket, and is disposed adjacent to the center of the stopper. When the stopper is lifted from the peripheral surface of the front socket, the stopper is lower than the stopper. Ribs are provided,
When the plug is pushed into the socket in a state where both ends of the stopper are engaged with the temporary holding projections, the plug contact portion of the stopper comes into contact with the tapered portion of the plug and is expanded. And a connector with a checker, wherein both ends of the stopper are configured to go over the temporary holding projections of the socket.

  According to the above invention, when the both ends of the stopper are engaged with the temporary holding projections of the socket, the central portion of the stopper rises from the peripheral surface of the socket and projects higher than the rib, so that the connector is completely completed. You can gropingly check that it is not connected to.

  Also, when the plug is pushed into the socket, the plug contact portion of the stopper comes into contact with the tapered portion of the plug and is expanded. At this time, since the plug contact portion of the stopper is located at a position deviated from the center of the socket toward both ends of the stopper, the stopper can not only be pushed out but also approached to the peripheral surface of the socket (notch of the socket). (To push into the groove). As a result, both ends of the stopper get over the temporary holding projection, and in this state, the stopper is fitted into the fitting groove or the step portion of the plug, and the plug is prevented from falling out of the socket.

  In this state, the stopper abuts or approaches the peripheral surface of the socket, and the center of the stopper has a height equal to or less than the rib, so that the top of the rib is touched by hand to determine whether the stopper protrudes from the rib. By checking, it can be confirmed whether or not the connection has been completed.

  As described above, according to the present invention, it is possible to confirm whether or not the connection has been completed simply by checking whether or not the central portion of the stopper is protruding from the rib by hand. The connection can be easily confirmed even at a work site where the user cannot hear the connection. Further, it is possible to provide a checker-equipped connector having the above-described connection confirmation function without increasing the number of components.

  According to a second aspect of the present invention, in the first aspect, the surface of the temporary holding projection, at which both ends of the stopper are engaged and temporarily held, is a center passing through the center of the stopper and the center of the socket. It is an object of the present invention to provide a connector with a checker formed perpendicular to a line or at an angle inclined from the vertical plane toward the insertion side of the stopper.

  According to the above invention, when pressing the central portion of the stopper with a finger to check whether the stopper protrudes against the rib of the socket, the pressing force causes the stopper to temporarily hold the protrusion for temporary holding in a state where connection is not completed. Can be prevented from slipping over.

  According to a third aspect of the present invention, in the first or second aspect, a protrusion is formed at an upper portion of the plug, a slit is formed at a portion corresponding to the protrusion of the socket, and the plug is connected to the socket. A checker-equipped connector is provided in which the protrusion is located at a position where the protrusion interferes with the stopper until the stopper is completely pushed down, and the stopper is prevented from moving down.

  According to the above invention, when inserting the plug into the socket, the projection is inserted into the slit. Since this projection passes below the stopper, even if the stopper is pushed downward in a state where the plug is not completely inserted into the socket, the stopper comes into contact with the projection and does not descend any further. It is possible to prevent erroneous recognition that connection has been completed in a state where the connection has not been made in the mating groove or the step portion.

  According to a fourth aspect of the present invention, in any one of the first to third aspects, the protrusion has a tapered shape that gradually increases in a direction in which the plug is inserted. Another object of the present invention is to provide a checker-equipped connector in which both ends of the stopper are located above the temporary holding projections even when they come into contact with each other.

  According to the above invention, the plug is inserted halfway into the socket, and the projection of the stopper abuts on the tapered portion of the plug and is pushed out. When the plug is pulled out again to perform the connection operation again, the stopper is pushed up by the tapered protrusion because the protrusion of the plug has a tapered shape that gradually increases in the insertion direction. When the plug is pulled out, the stopper is pushed up to the highest position of the projection of the plug, and both ends of the stopper are located above the projection for temporary holding, so that both ends of the stopper are engaged with the projection for temporary holding. Combine. Therefore, since the stopper always returns to the position where the stopper is engaged with the temporary holding projection, the connection can be confirmed by the height of the stopper even when the plug is inserted again into the socket and the connection operation is performed again.

  As described above, according to the present invention, it is possible to confirm whether or not the connection has been completed simply by checking whether or not the center of the stopper projects from the rib by hand. Connection confirmation can be easily performed even at a work site where a sound cannot be heard. Further, it is possible to provide a checker-equipped connector having the above-described connection confirmation function without increasing the number of components.

  1 to 7 show an embodiment of a connector with a checker according to the present invention. FIG. 1 is an exploded perspective view of the connector, FIG. 2 is a perspective view showing an assembled state of a socket and a stopper of the connector, and FIG. 3 is an assembled state of a socket and a stopper of the connector. FIG. 4 shows an assembled state of a socket and a stopper of the connector, (a) is a side view, (b) is a side sectional view, and FIG. 5 is an explanatory diagram showing a dimensional relationship of parts of the connector. (A) is an explanatory view showing the dimensions of the socket, (b) is an explanatory view showing the dimensions of the plug, (c) is an explanatory view showing the dimensions of the stopper, (d) is a perspective view of the stopper, and FIG. FIGS. 7A and 7B are explanatory diagrams showing dimensional relationships of components of the connector, FIG. 7A is an explanatory diagram showing dimensions of a socket, FIG. 7B is an explanatory diagram showing dimensions of a stopper, and FIG. Explanatory diagram showing the action of the stopper when performing There is an explanatory view, (b) explanatory view showing a state in the middle of insertion of the plug, (c) is an explanatory view showing the insertion completed state of the plug showing the (a) is before insertion of the plug state.

  As shown in FIG. 1, the connector 10 includes a plug 20 attached to an end of one tube to be connected, a socket 40 attached to an end of the other tube, and a bent wire attached to the socket 40. And the stopper 60 formed.

  Referring also to FIG. 2, the socket 40 has, at one end, a mounting port 41 to which the other pipe (not shown) to be connected, for example, a hose, a tube, or the like is connected, and receives the plug 20 at the other end. It has an insertion port 43. The attachment port 41 is formed so as to be bent and extended at an angle of about 60 degrees with respect to the socket body. An annular rib 42 is formed at the distal end of the mounting opening 41 to enhance the effect of preventing the pipe to be connected from coming off.

  The main body of the socket 40 has a cylindrical shape of a size and shape for receiving the plug 20. The main body portion of the socket 40 has a shape that gradually increases in diameter, and a first enlarged diameter portion 44 having an inner diameter slightly enlarged from the connection portion of the mounting port 41 and a slightly enlarged diameter from the first enlarged diameter portion 44. And a third enlarged diameter portion 46 further enlarged from the second enlarged diameter portion 45.

  As shown in FIG. 4B, a step 47 is formed between the first enlarged diameter portion 44 and the second enlarged diameter portion 45 on the inner periphery of the socket 40, and the second enlarged diameter portion 45 is formed. A step portion 48 is formed between the first and second enlarged diameter portions 46. A pressing ring 49 having a substantially L-shaped cross section and formed in an annular shape is attached to the step portion 48.

  Further, a seal ring 50 is provided in an annular groove formed between the step portion 47 and the press ring 49. That is, the seal ring 50 is held at a predetermined position by the step portion 47 and the press ring 49. The holding ring 49 is joined to the inner periphery of the socket 40 by welding, bonding, or the like.

  Referring to FIGS. 1 to 4, a guide groove 51 into which a positioning protrusion described later of the plug 20 is inserted is formed in the third enlarged diameter portion 46 of the socket 40, and the outer circumference of the guide groove 51 is partially formed. The bulging wall portion 52 is formed.

  A notch groove 53 into which the stopper 60 is inserted is formed in the third enlarged diameter portion 46. The notch groove 53 is formed in a slit shape so as to penetrate the inside and outside of the socket 40 along a circumferentially opposed portion of the third enlarged diameter portion 46.

  A pair of ribs 54 projecting from the opposing edges of the notch groove 53 are formed in the upper half of the notch groove 53 on the outer periphery of the third enlarged diameter portion 46, and these ribs 54 are securely sandwiched by the stopper 60. I keep it. Further, a recess 55 having a V-shaped cross section along the circumferential direction is formed in a part of the cutout groove 53 on the outer periphery of the third enlarged diameter portion 46.

  Further, a temporary holding projection 56 is formed at the lower end of the notch groove 53 on the outer periphery of the third enlarged diameter portion 46 so that the end of the stopper 60 is engaged and temporarily held. In the temporary holding projection 56 of this embodiment, the surface 56a on the insertion side of the stopper 60 (the upper surface in FIGS. 1 to 4) is aligned with a center line L (see FIG. 3) passing through the center of the stopper 60 and the center of the socket 40. It is perpendicular to it.

  Further, a stopper projection 57 is formed below the temporary holding projection 56, and between the temporary holding projection 56 and the stopper projection 57, when the connection is terminated in a manner described later, the stopper 60 is A recess 58 into which both ends 62 are fitted is formed.

  As shown in FIG. 5, the stopper 60 is composed of a wire or the like bent in a gate shape as a whole. The central portion 61 of the stopper 60 forms a bent portion that fits the outer periphery of the bulging wall portion 52. Portions of the stopper 60 that are separated from the central portion 61 by a predetermined distance form both arms 63 bent so as to be parallel to each other. It is bent forward at approximately 90 ° toward the 43 side. Further, a plug contact portion 64 bent inwardly in an arc is formed at a portion closer to the base from both ends 62 bent forward.

  When mounting the stopper 60 on the socket 40, first, while expanding both end portions 62 of the stopper 60, the stopper 60 is inserted from above while being inserted into the notch groove 53 of the socket 40. Then, both end portions 62 of the stopper 60 are fitted into the V-shaped concave portion 55 on the outer periphery of the socket 40 and are temporarily held. In this state, when the stopper 60 is further pushed downward, the both ends 62 of the stopper 60 slide while expanding again, and the both ends 62 are engaged with the temporary holding projections 56 and are temporarily held.

  At this time, as shown in FIG. 2 and FIG. 7A, both the arm portions 63 of the stopper 60 are inserted into the notch grooves 53 of the socket 40, and a part thereof is inward from the inner periphery of the notch grooves 53. , And the plug contact portion 64 particularly protrudes largely inward.

  In this case, as shown in FIG. 3 and FIG. 7A, the plug abutting portion 64 is provided with the both ends 62 of the stopper 60 engaged with the upper surface 56 a of the temporary holding projection 56. It must be formed at a position deviated from the center O toward both ends of the stopper 60 (downward in FIG. 3).

  On the other hand, as shown in FIG. 1 and FIG. 4B, the plug 20 has a first tapered portion 22, a straight portion 23, and a second tapered portion 24 from the tip side in a cross section along the axial direction. Are formed continuously, and an annular groove 25 and a positioning projection 26 are formed on the outer periphery of the top of the second tapered portion 24. Instead of the annular groove 25, an annular step that the stopper 60 can engage with may be formed.

  The first enlarged diameter portion 44 of the socket 40 has an inner diameter into which the first tapered portion 22 and the straight portion 23 of the plug 20 are inserted. Further, the seal ring 50 arranged on the second enlarged diameter portion 45 of the socket 40 has an inner diameter that is in close contact with the straight portion 23 of the plug 20. Further, the third enlarged diameter portion 46 of the socket 40 has an inner diameter capable of accommodating the second tapered portion 24, the annular groove portion 25, the positioning projection 26, and the like of the plug 20. The positioning projection 26 is inserted into the guide groove 51 of the socket 40, whereby the angle at which the plug 20 and the socket 40 are assembled is regulated.

  Next, a description will be given of the dimensional relationship between the respective components described above. The inner diameter of the socket 40 in FIG. 5A is A, and the height of the temporary holding projection 56 from the inner periphery of the socket 40 is B, and FIG. The outer diameter of the plug 20 in (b) is C, the height from the straight portion 23 of the plug 20 to the top of the second tapered portion 24 is D, and the plug contact portion 64 of the stopper 60 in FIG. Assuming that the distance from the contact to the end 62 is E, it is necessary to have the relationship of the following formula 1, and more preferably the relationship of the following formula 2.

(Equation 1)
C + E> A + B Equation 1

(Equation 2)
C + E> A + B> C−D + E Equation 2
Further, it is necessary that the relationship of the following Expression 3 is established between the distances F, G, H of the socket 40 in FIG. 6A and the distances I, J in FIG. 6B. It is preferable to have the relationship of the following Expression 4.

(Equation 3)
G ≧ J> H Equation 3

(Equation 4)
F> I Equation 4

Next, the operation of the connector 10 will be described.
The stopper 60 is mounted on the socket 40 in advance by the above method. At this time, both ends 62 of the stopper 60 are engaged with the upper surface 56 a of the temporary holding projection 56. As a result, as shown in FIG. 7A, the central portion 61 of the stopper 60 projects from the top of the rib 54 of the socket 40 (see the above-described formula 3). The operator can know that the central portion 61 of the stopper 60 is protruding from the rib 54 of the socket 40 by touching with a finger, so that the operator can easily confirm that the stopper 60 is in the temporary holding state. it can.

  In this state, the plug 20 is inserted into the insertion opening 43 of the socket 40 while inserting the positioning projection 26 of the plug 20 into the guide groove 51 of the socket 40. The plug 20 is pushed in while abutting on the seal ring 50 arranged in the inside 20 and pressing the seal ring 50 against the inner wall of the socket 20.

  When the plug 20 is further pushed in, the plug contact portion 64 of the stopper 60 comes into contact with the second tapered portion 24 of the plug 20, and as shown in FIG. 7B, while sliding on the surface of the second tapered portion 24, The stopper 60 is pushed open. In the process of expanding the stopper 60 in this manner, the both ends 62 of the stopper 60 are expanded in diameter from the end of the temporary holding projection 56 (see Equation 1 above).

  Further, since the plug abutting portion 64 of the stopper 60 is formed at a position deviated from the center of the socket 40 toward both ends of the stopper 60 (downward in FIG. 3), the elastic force in the closing direction of the stopper 60 is provided. This generates a force that pushes the stopper 60 downward. As a result, both ends 62 of the stopper 60 move downward beyond the end of the temporary holding projection 56.

  When the plug 20 is pushed in as far as it will go, the stopper 60 is fitted into the annular groove 25 of the plug 20, as shown in FIG. As a result, the both arm portions 63 of the stopper 60 and the plug contact portion 64 engage with the inner wall of the annular groove 25 of the plug 20, and the plug 20 is prevented from coming off with respect to the socket 40, thereby completing the connection.

  At this time, the height of the central portion 61 of the stopper 60 is equal to or lower than the height of the rib 54 of the socket 4. By knowing that the stopper 60 does not protrude by touching, it can be confirmed that the connection has been completed (see Equation 3 above). Note that, in the present invention, the equivalent height means that the heights are substantially the same so that it is possible to confirm that they are almost flush when touched with a finger, and it is not necessary that the heights be exactly the same. . Alternatively, the center portion 61 of the stopper 60 may be lower than the rib 54 so that only the rib 54 projects when touched by a finger.

  As described above, according to the present invention, even when the worker inserts his hand in a narrow place and makes a pipe connection at a position where the connection part cannot be visually recognized from the outside, the center part 61 of the stopper 60 is The connection can be confirmed simply by touching with a finger whether or not it is protruding from the terminal. Further, the connection can be confirmed even in an environment where the connection sound cannot be heard due to the noise at the work site. Further, since the number of parts is the same as that of the conventional connector, the parts management becomes easy without increasing the manufacturing cost.

  FIG. 8 shows another example of the stopper used in the connector according to the present invention. Note that, in the following description of the embodiment, the same reference numerals are given to substantially the same portions as the above embodiment, and the description thereof will be omitted.

  This stopper 60a is different from the above-described embodiment in that the plug contact portion 64a is formed by bending in a V-shape toward the inside. Thus, the shape of the stopper 60a can be variously changed.

  FIG. 9 shows another example of a socket used in the connector according to the present invention.

  This socket 40a differs from the above-described embodiment in that a notch 54a is formed in one of the ribs 54. In this embodiment, when it is necessary to release the connection by pulling up the stopper 60 after the connector is connected, the tip of the flathead screwdriver is inserted through the notch 54a, so that it is located below the center 61 of the stopper 60. The connector can be released by forcibly pulling up the stopper 60 using the principle of leverage.

  FIG. 10 shows still another example of the socket used in the connector according to the present invention.

  In the socket 40b, the upper surface 56a of the temporary holding projection 56 is formed at an angle θ inclined from a plane perpendicular to the center line L of the socket 40 toward the insertion side of the stopper (upward in FIG. 10). Is different from the above embodiment. In this embodiment, in a state where both ends of the stopper are engaged with the upper surface 56a of the temporary holding projection 56, it is possible to prevent the stopper from being accidentally detached from the temporary holding projection 56 by pressing down the stopper, and Confirmation of the connection can be more reliably prevented.

  11 to 16 show another embodiment of the connector with checker according to the present invention. 11 is an exploded perspective view of the connector, FIG. 12 is a perspective view showing an assembled state of a socket and a stopper of the connector, FIG. 13 shows a plug of the connector, (a) is a side view, and (b) is an end surface. 14A and 14B show a socket of the connector, FIG. 14A is an end view, FIG. 14B is a side view, FIG. 14C is a cross-sectional view taken along line AA of FIG. 14B, and FIG. The state before insertion is shown, (a) is a cross-sectional view of the socket along the notch groove, (b) is an explanatory view showing the positional relationship between the plug and the socket, and FIG. 16 shows a state where the plug is partially inserted. , (A) is a sectional view of the socket along the notch groove, (b) is an explanatory view showing the positional relationship between the plug and the socket, FIG. 17 shows a state in which the plug is completely inserted, (a) is a notch Sectional view of the socket along the groove, (b) is a view showing the positional relationship between the plug and the socket It is a diagram. The same parts as those in the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted.

  As shown in FIGS. 11 and 12, the connector 11 includes a plug 20a, a socket 40c, and a stopper 60b.

  Referring also to FIG. 13, the plug 20 a has a first tapered portion 22, a straight portion 23, and a second tapered portion 24 from the insertion side end, and an annular groove 25 is formed behind the second tapered portion 24. ing. The rear end of the plug 20a is connected to a tube (not shown) or to a device to be connected to a pipe.

  In this embodiment, a pair of protrusions 70 are provided upright on the second tapered portion 24 of the plug 20 along the axial direction. The protrusion 70 has a tapered shape such that its upper surface 70a gradually becomes higher in the insertion direction. However, the upper surface 70a of the protrusion 70 does not necessarily have to be tapered as long as the upper surface 70a holds a height described later. The annular groove 25 is formed at the rear of the projection 70.

  Referring also to FIG. 14, the socket 40 c has a pair of slits 71 into which the protrusions 70 of the plug 20 a are inserted, formed in parallel with the insertion port 43 along the axial direction. The rib 54 is formed only on the side opposite to the insertion port 43 with respect to the stopper 60b. The rib 54 is divided into three peaks by the slit 71.

  Referring also to FIG. 15, the stopper 60b has a central portion 61, both arm portions 63, and both end portions 62, as in the above-described embodiment. In the case of this embodiment, the both arm portions 63 have a shape in which the middle portion is slightly bent to the outer diameter side, and the lower portions of the both arm portions 63 are closest to each other. The contact portion 64b is formed.

  When both ends 62 of the stopper 60b are locked on the upper surface 56a of the temporary holding projection 56, the central portion 61 is higher than the rib 54, and when the plug 20a is further inserted, the projection 70 is connected to the stopper 60b. It is said that the height does not hit. However, both ends 62 of the stopper 60b are set to be higher than the upper surface 56a of the temporary holding projection 56 when the upper and lower surfaces of the stopper 60b are in contact with the top of the protrusion 70.

  Next, the operation of this connector will be described. As shown in FIG. 15, both ends 62 of the stopper 60b are engaged with the upper surface 56a of the temporary holding projection 56 and are temporarily held. As a result, the central portion 61 of the stopper 60b projects from the top of the rib 54 of the socket 40c. The operator can know that the central portion 61 of the stopper 60b is protruding from the rib 54 of the socket 40c by touching with a finger, so that it is easy to confirm that the stopper 60b is in the temporary holding state. it can.

  In this state, as shown in FIG. 16, the plug 20a is inserted into the socket 40c while the projection 70 of the plug 20a is inserted into the slit 71 of the socket 40c. In the case of this embodiment, since the rotation is determined by the projection 70 and the slit 71, it is not necessary to separately provide a positioning projection on the plug 20a.

  When the plug 20a is pushed in in this manner, the plug contact portion 64b below the arms 63 of the stopper 60b contacts the second tapered portion 24 of the plug 20a, and the stopper 60b slides on the surface of the second tapered portion 24 while sliding. Is spread out. In the process of expanding the stopper 60b in this manner, both ends 62 of the stopper 60b are expanded in diameter from the end of the temporary holding projection 56.

  Further, the plug abutting portion 64b below the both arm portions 63 of the stopper 60b is biased toward both ends of the stopper 60b (downward in FIG. 16) from the center of the socket 40, and therefore, the closing direction of the stopper 60b. Due to the resilient force, a force for pushing down the stopper 60b is generated. As a result, both ends 62 of the stopper 60b move downward beyond the end of the temporary holding projection 56.

  When the plug 20a is pushed all the way to the end, the stopper 60b fits into the annular groove 25 of the plug 20a as shown in FIG. As a result, both arms 63 of the stopper 60b engage with the inner wall of the annular groove 25 of the plug 20a, and the plug 20a is prevented from coming off with respect to the socket 40c to complete the connection.

  At this time, the height of the central portion 61 of the stopper 60b is equal to or lower than the height of the rib 54 of the socket 40c. By knowing that the stopper 60 does not protrude by touching, it can be confirmed that the connection has been completed.

  Further, in the case of this embodiment, for example, even when a force pushing the stopper 60b downward is applied in the state of being inserted as shown in FIG. 16, the projection 70 of the plug 20a is engaged with the stopper 60b. The stopper 60b is prevented from moving downward. For this reason, it is possible to prevent the stopper 60b from moving downward during insertion and erroneously recognizing that the connection has been completed.

  By the way, even in the state of being inserted, the stopper 60 b moves downward beyond the end of the temporary holding projection 56 because both ends 62 are larger in diameter than the end of the temporary holding projection 56. Therefore, in the case of the above-described embodiment of FIGS. 1 to 10, if the plug 20 is pulled out in the middle of insertion and the insertion operation is performed again, the stopper 60 does not return to the temporary holding projection 56 but Will engage. Therefore, when reinserting, it is not possible to check the connection depending on the height of the stopper 60.

  On the other hand, in the case of this embodiment, when the plug 20a is inserted halfway into the socket 40c, and the plug 20a is pulled out and reinserted, the tapered upper surface of the projection 70 is drawn in the process of pulling out the plug 20a. The stopper 60b is pushed up by 70a. As a result, both ends 62 of the stopper 60b return to positions higher than the temporary holding projections 56, and when the plug 20a is pulled out, the both ends 62 of the stopper 60b engage with the upper surface 56a of the temporary holding projection 56. As a result, even when the plug 20a is inserted again, the connection can be confirmed by the height of the stopper 60b.

It is an exploded perspective view showing one embodiment of a connector with a checker by the present invention. FIG. 3 is a perspective view showing an assembled state of a socket and a stopper of the connector. FIG. 4 is an end view showing the assembled state of the socket and the stopper of the connector as viewed from the insertion opening side of the socket. 2A and 2B show an assembled state of a socket and a stopper of the connector, wherein FIG. 2A is a side view and FIG. It is explanatory drawing which shows the dimension relationship of the component of the connector, (a) is an explanatory diagram showing the dimension of a socket, (b) is an explanatory diagram showing the dimension of a plug, (c) is an explanatory diagram showing the dimension of a stopper, (D) is a perspective view of the stopper. It is explanatory drawing which shows the dimension relationship of the component of the same connector similarly, (a) is explanatory drawing which shows the dimension of a socket, (b) is explanatory drawing which shows the dimension of a stopper. It is explanatory drawing which shows the effect | action of the stopper at the time of inserting a plug in the socket of the same connector, (a) is explanatory drawing which shows the state before plug insertion, (b) is explanatory drawing which shows the state in the middle of plug insertion. (C) is an explanatory view showing a plug insertion completed state. It is a front view showing other examples of a stopper used in a connector by the present invention. FIG. 9 is a perspective view showing another example of the socket used in the connector according to the present invention. FIG. 9 is a cross-sectional view showing still another example of the socket used in the connector according to the present invention. It is an exploded perspective view showing other embodiments of the connector with a checker by the present invention. FIG. 3 is a perspective view showing an assembled state of a socket and a stopper of the connector. The plug of the same connector is shown, (a) is a side view, (b) is an end view. 3A and 3B show a socket of the connector, wherein FIG. 3A is an end view, FIG. 3B is a side view, and FIG. 3C is a cross-sectional view taken along line AA of FIG. In the same connector, a state before a plug is inserted is shown, (a) is a sectional view of a socket along a notch groove, and (b) is an explanatory view showing a positional relationship between the plug and the socket. In the same connector, a state where a plug is partially inserted is shown, (a) is a sectional view of a socket along a notch groove, and (b) is an explanatory view showing a positional relationship between the plug and the socket. In the same connector, a state where a plug is completely inserted is shown, (a) is a sectional view of a socket along a notch groove, and (b) is an explanatory view showing a positional relationship between the plug and the socket.

Explanation of reference numerals

10, 11 Connector 20, 20a Socket 22 First taper portion 23 Straight portion 24 Second taper portion 25 Annular groove 26 Positioning projections 40, 40a, 40b, 40c Socket 41 Mounting port 42 Rib 43 Insertion port 44, 45, 46 Expansion Diameter portions 47, 48 Step portion 49 Holding ring 50 Seal ring 51 Guide groove 52 Swelling wall portion 53 Notch groove 54 Rib 54a Notch portion 55 Recess 56 Temporary holding projection 56a Upper surface 57 Stopper projection 58 Recess 60, 60a, 60b, 60c Stopper 61 Central part 62 Both ends 63 Both arms 64, 64a, 64b Plug contact part 70 Projection 70a Upper surface 71 Slit

Claims (4)

It comprises a substantially tubular socket attached to one pipe end to be connected and a substantially tubular plug attached to the other pipe end, and the socket is provided with a pair of notched grooves on opposing peripheral surfaces. A stopper having an overall gate shape is attached to the cutout groove, and the plug has a tapered portion that abuts against the stopper when inserted into the socket and gradually expands the stopper. In a connector formed with a groove or a step portion along the circumferential direction to be fitted,
In the stopper, a plug contact portion protruding toward the inner periphery of the socket through the notch groove is provided at a position offset from the center of the socket toward both ends of the stopper,
The socket is provided with a temporary holding projection that engages with both ends of the stopper and holds the central portion of the stopper floating above the peripheral surface of the socket, and is disposed adjacent to the central portion of the stopper. When the stopper is lifted from the peripheral surface of the front socket, the stopper is lower than the stopper, and when both ends of the stopper are over the temporary holding projection, the stopper has a height equal to or higher than the stopper. Ribs are provided,
When the plug is pushed into the socket in a state where both ends of the stopper are engaged with the temporary holding projections, the plug contact portion of the stopper comes into contact with the tapered portion of the plug and is expanded. A connector with a checker, wherein both ends of the stopper are configured to go over the temporary holding projections of the socket.   The surface of the temporary holding projection, at which both ends of the stopper are engaged and temporarily held, is perpendicular to a center line passing through the center of the stopper and the center of the socket, or the stopper is positioned from the vertical surface. The connector with a checker according to claim 1, wherein the connector is formed at an angle inclined toward the insertion side of the connector.   A protrusion is formed on the upper part of the plug, a slit is formed in a portion corresponding to the protrusion of the socket, and the protrusion interferes with the stopper until the plug is completely pushed into the socket. The checker-equipped connector according to claim 1, wherein the connector is configured to restrict the stopper from lowering. The protrusion has a tapered shape that gradually increases in the direction of insertion of the plug, and even if the stopper abuts at its highest position, both ends of the stopper are positioned above the temporary holding protrusion. The checker-equipped connector according to any one of claims 1 to 3, wherein the connector is configured to perform a check.

Images