JPH0732284U - Pipe fitting - Google Patents

Abstract

(57) [Summary] [Purpose] If plugs and sockets with different inner diameters are mixed and the plugs and sockets with different inner diameters or fluids are mistakenly selected, these sockets and plugs (EN) Provided is a pipe joint in which connection can be disabled and one of a plug and a socket can be rotated so that an identification member can be easily aligned. [Composition] A plug P and a socket S in a mixed state are taken out from the group having the same angle formed by the projection of the plug and the groove of the socket, and the sleeve 2 is moved leftward against the spring 5 and further rotated. Meanwhile, the notch position of the sleeve 2 is aligned with the punch mark formed on the protrusion of the plug, and the plug P is inserted. At the same time, ball 7 is plug P
The plug P is prevented from slipping out by fitting into the recess 29 formed in the above, and when the sleeve 2 is released, the sleeve 5 is pushed back by the spring 5, the ball 7 is pushed by the projection 6, and the plug P Can't get out.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a pipe joint made of resin, metal, or the like. More specifically, when the appearance is the same but the inner diameter is different, or the fluids flowing inside are different, the plug and socket are The present invention relates to a pipe joint that is prevented from being erroneously connected to each other.

[0002]

[Prior art]

 In the case of pipe joints that are used by connecting a plug and socket formed of resin, metal, etc., in order to reduce the manufacturing cost of pipe joints, for example, they have the same outer diameter shape, Only the inner diameter of the mounting thread of the connecting pipe is different, which constitutes a pipe joint that can be adapted to various places of use. Although such pipe fittings are marked on the product itself to indicate the inner diameter, they are not conspicuous, so if multiple pipe fittings with the same external appearance but different inner diameter dimensions are used in one place, It is difficult to easily determine which plug and socket to match.

A particular problem with such a pipe joint is when a large number of pipe joints are used at one time, and since the shapes of the connecting portions between the plug and the socket are the same, they are interchangeable. However, there is a possibility that two pipes having different connecting pipe diameters may be mistakenly connected to each other, which causes an increase in fluid resistance or a loss in flow rate. In addition, if compatible plugs or sockets are used in the middle of multiple conduits through which different fluids (especially chemicals) flow, or if plugs or sockets that are not clearly marked are used. There is a possibility that different fluid pipes may be accidentally connected to each other, which may cause fluid mixing or chemical reaction, which may cause a serious accident.

As described above, in the conventional pipe joint, when the plugs and the sockets are placed in a mixed state, it is possible to distinguish which one has the desired inner diameter size or the fluid to be connected. There was a drawback that it was not easy to discriminate and it was very difficult to distinguish only by appearance. For this reason, the applicant has previously proposed a pipe joint that can prevent erroneous connection even if the pipe joint is very difficult to distinguish only by appearance (Jpn. Pat. Appln. KOKAI Publication No. 5-8396).

This pipe joint will be described with reference to the drawings. FIG. 5 (a) is a side view of the plug P, and FIG. 5 (b) is a side view of the upper half of the socket S as a sectional view. As is well known, with the socket S, the plug P is fitted into the socket S and used as a set. In the figure, 51 is a socket main body, and a stopper 53 is fixed to the outer peripheral surface of the socket main body via a stop ring 52, and a sleeve 54 is provided so as to be slidable on the stopper 53 and the socket main body 51. Has been. A coil-shaped sleeve spring 55 is interposed between the sleeve 54 and the stopper 53, and a protrusion 56 for pushing the ball 57 into a tapered hole 51a provided in the socket body 51 is provided at an intermediate portion of the inner periphery of the sleeve 54. Has been formed. When the sleeve 54 is moved leftward against the spring 55 from the state shown in the drawing, the protrusion 56 is disengaged from the position of the ball 57, and the ball 57 can be moved upward from the hole 51a. In the figure, 58 is a backup ring, 59 is an O-ring, and 60 is a valve.

The valve 60 housed in the socket body 51 is normally biased to the right in the figure by a bellows-shaped spring 62 arranged between the valve body 60 and the spring holder 61, and a seat provided on the socket body 51. The flow path formed between 51b and 51b is closed. Further, the spring holder 61 is pressed against the ring 62 fixed to the inner circumference of the socket body 51 by the urging force of the bellows-shaped spring 62. However, when the plug P, which will be described later, engages with the socket S and the end surface 60a of the valve 60 is pushed by the end surface of the valve of the plug P, the valve 60 resists the urging force of the bellows-like spring 62 and is left in the figure. And moves toward the seat 51b provided in the socket body 51, and the fluid flows through the hole 60b formed in the valve 60.

Furthermore, in order to prevent erroneous connection with the plug P, the socket S is provided with a display member 63 or 64 indicating the socket inner diameter or the fluid used. The display member 63 is provided at the tip of the socket body 51 and has, for example, a polygonal shape such as a hexagonal shape or an octagonal shape, and a hexagonal shape or an octagonal shape on the outer periphery of the plug P described later. Polygonal display members such as the above are formed, and the plug P and the socket S cannot be connected unless the shapes of both display members match. Further, the display member 64 can display the inner diameter of the socket, the fluid flowing therein, and the like by color.

Next, the structure of the plug P will be described with reference to FIG. 5B. 71 is a plug body, and a valve 72 housed in the plug body 71 is a bellows arranged between the spring holder 73. The spring 74 is normally urged to the left in the figure, and is pressed against the seat 75 provided on the plug body 71 to close the flow path. Further, the spring holder 73 is pressed against the ring 76 fixed to the inner circumference of the plug body 71 by the urging force of the bellows-shaped spring 74. Further, in order to prevent erroneous connection with the socket S, the plug P 1 is provided with an indicator member 77 or 78 indicating the plug inner diameter or the used fluid on the outer circumference. The display member 77 has, for example, a polygonal shape such as a hexagon, an octagon or the like so as to correspond to the hexagon, octagon or the like of the display member 63 of the socket S. The plug P and the socket S cannot be connected unless the hexagonal and octagonal shapes of the members match. Further, the display member 78 can display the inner diameter of the socket, the fluid used, or the like by color.

When the display members of the plug P and the socket S are the same, the plug P of FIG. 5B is fitted deeper into the hole 65 of the socket S of FIG. The end surface 72a of the valve 72 is pressed against the end surface 60a of the valve 60 of the socket S to open the valve, and the fluid is allowed to flow through the hole 72b formed in the valve 72. At the same time, the ball 57 fits into the recess 79 formed in the plug P so that the plug P does not come out and the flow path is communicated. When the display member is colored, the plug P and the socket S having the same color can be taken out and connected in the same manner as described above.

In the plug and the socket having the above-mentioned configurations, even if the plurality of plugs and sockets are in a mixed state, the display member having a shape that can be fitted to each other is provided. Even if the P and the socket S are to be fitted together, they cannot be fitted together, and fitting of wrong combination can be surely avoided.

[0011]

[Problems to be solved by the device]

 However, although the pipe joint as described above can reliably prevent erroneous connection, it has been found to have the following disadvantages. That is, in the pipe joint of the above example, the display members provided on the plug and the socket are fixed and attached integrally with the plug or the socket body. For this reason, in the case of a display member that displays the inner diameter and fluid depending on the shape, it is necessary to align the display members in order to fit both. However, since the plug and the socket are usually attached to the pipe so as not to rotate, the pipe may have to be rotated when trying to align the display member. Also, when it is difficult to rotate the pipe, it is necessary to connect the plug and the socket to the pipe so that the position of the display member of the plug and the display member of the socket match in advance, which makes the work troublesome. Is.

Therefore, according to the present invention, when plugs and sockets having different inner diameters are mixed and the plugs and sockets having different inner diameters or fluids are mistakenly selected and they are to be connected. , The same inner diameter size or different fluid pipes cannot be connected, and the identification members provided on the plug and socket can be easily aligned without rotating the pipes, and both can be easily connected without a doubt. The purpose is to provide a pipe joint.

[0013]

For this reason, the present invention is a pipe joint in which a plug and a socket are connected to each other to form a set, and the socket has a plug insertion portion in which an identification portion having a different inner diameter shape is provided. Is formed rotatably, and the outer periphery of the plug is formed with an identification portion having an outer diameter shape corresponding to the inner diameter shape of the identification portion on the socket side at a position corresponding to the identification portion. The identification member of the socket and the identification member formed on the outer circumference of the plug are configured so that only the plug having the same outer diameter shape can be inserted into the socket. Is the means for solving the problem.

[0014]

[Action]

 From the plugs P and sockets S in the mixed state, the identification parts of the same color, or the plugs and sockets with the same angle formed by the projection and the groove are taken out. Then, while rotating the sleeve 2, the notch position of the sleeve 2 is aligned with the identification portion formed on the protrusion of the plug, and is moved leftward against the coil spring 5 to insert the plug P. It is fitted in the concave portion 29 formed in. Next, when the sleeve 2 is released, the sleeve 5 is pushed back by the spring 5, the ball 7 is pushed by the protrusion 6, and the plug P cannot be pulled out.

On the other hand, when the end surface 10a of the socket-side valve 10 is pushed by the end surface 22a of the valve 22 of the plug P, the valve 10 moves to the left in the figure against the biasing force of the bellows-shaped spring 12, The space between the seat 1b provided in the socket body 1 is opened, and the fluid flows through the hole 10b formed in the valve 10. Also on the plug P side, since the end face 22a of the valve 22 is pushed by the end face 10a of the valve 10 of the socket S, the valve 22 is opened and the fluid flows through the hole 22b formed in the valve 22.

[0016]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing an upper half of a socket S as a sectional view, and FIG. 3 is a side view showing an upper half of a socket S as a sectional view. As is well known, the plug P and the socket S have a structure in which the plug P is fitted to the socket S and used as a set, and the plug P and the socket S have chemical resistance. Therefore, it is formed of a material having chemical resistance, such as Teflon or stainless. The sealing O-ring is also processed with Teflon coating. The configurations of the socket S and the plug P will be described below.

[Structure of Socket] In FIG. 1, reference numeral 1 denotes a socket body, and a sleeve 4 also serving as an identification member is rotatably and slidably provided on an outer peripheral surface of the socket body. A small diameter portion 4a and a large diameter portion 4b are formed on the inner peripheral surface of the sleeve 4 from the center to the left and right. A stop ring 2 is fitted to one end of the large diameter portion 4b, and the stop ring 2 is locked to one end of a protruding portion 3 formed on the outer periphery of the socket body 1 so that the sleeve from the socket body 1 4 is prevented from falling off. Further, the sleeve 4 is provided with a coil spring 5 fitted and inserted in the large diameter portion 4b of the inner circumference by engaging one end of the protruding portion 3 of the socket body 1 and the end portion of the small diameter portion 4a. 4, the coil spring 5 can always hold the position shown in the figure by the urging force of the coil spring 5. A ball retainer portion 6 and a ball escape portion 6a are formed adjacent to each other at one end of the small diameter portion 4a on the inner circumference of the sleeve 4, and the taper hole formed in the socket body 1 by the ball retainer portion 6 is formed. The ball 7 loosely fitted in 1a is prevented from protruding in the outer diameter direction. When the sleeve 4 is moved leftward against the coil spring 5 from the state shown in the drawing, the ball pressing portion 6 is disengaged from the position of the ball 7, and the ball 7 comes to the position of the ball escape groove 6a. 7 can be moved from the tapered hole 1a in the outer diameter direction. Further, a small diameter portion 18 having a taper portion 16 is formed at the tip of the socket body 1 from the vicinity of the taper hole 1a, and the taper portion 16 and the taper portion 17 of the ball clearance groove 6a are engaged with each other to form the ball 7 and the ball. It is configured so as to coincide with the escape groove 6a. The engagement between the taper portion 16 and the taper portion 17 prevents the sleeve 4 from retracting more than necessary.

Further, the sleeve 4 is formed with an identification portion for preventing an erroneous connection with the plug P at the plug insertion opening end portion. The identification portion is formed on the inner peripheral surface of the sleeve 4 protruding from the end of the socket body 1, and is located at a predetermined angle (90 degrees in the figure) as shown in FIG. It is composed of two grooves M1 and M2. The angle formed by each groove is determined by the inner diameter and the fluid used, and one of the grooves (upper side in the figure) can be easily aligned with the identification part on the plug P side. A notch 13 is formed as shown in FIG. Therefore, when connecting the socket and the plug, if the angle θ of the groove formed on the socket side and the angle θ of the protrusion formed on the plug side described later do not match, the plug P and the socket It cannot connect to S. In addition, an identification member for each color, which can distinguish the inner diameter of the socket or the fluid used, is attached to an appropriate position on the outer circumference of the socket.

The valve 10 housed in the socket body 1 is normally urged to the right in the figure by a bellows-shaped spring 12 arranged between the valve body 10 and the spring holder 11, and the seat 1 b provided on the socket body 1 is provided. The flow path 19 formed between and is closed. The spring holder 11 is pressed against the ring 14 fixed to the inner circumference of the socket body 1 by the urging force of the bellows spring 12. However, when the plug P described later engages with the socket S and the end surface 10a of the valve 10 is pushed by the end surface of the valve of the plug P, the valve 10 resists the biasing force of the bellows-like spring 12 and moves to the left in the figure. To the seat 1b provided in the socket body 1, and the fluid flows through the hole 10b formed in the valve 10. In the figure, 8 is a backup ring which constitutes a groove into which the O-ring 9 is inserted. 1c is a spanner hook, and 1d is a threaded portion for pipe connection.

[Structure of Plug] The structure of the plug P will be described with reference to FIGS. 3 and 4A and 4B. Reference numeral 21 denotes a plug body, and the outer periphery of the plug body 21 has a socket. An identification portion is formed to prevent erroneous connection with S. This identification portion is composed of protrusions T1 and T2 formed at a position forming a predetermined angle θ2 (90 degrees in the figure) on a ring T fitted around the outer periphery of the plug body, and the protrusions T1 and T2 correspond to each other. It is configured with an angle so as to fit into the two grooves M1 and M2 formed on the socket side. The angle formed by the protrusions is determined by the inner diameter and the fluid used, and one of the protrusions (upper side in the figure) has a punch mark or a color at a position matching the notch 13 on the socket S side. It is good to mark etc.

Accordingly, when the socket S and the plug P are connected, the notch 13 formed in the sleeve 2 and the punch mark of the protrusion on the plug P side can be easily aligned, and the groove M1 formed on the socket S side, The projections T1 and T2 formed on the plug P side can be inserted and inserted into M2. If the angle θ1 formed by the grooves M1 and M2 on the socket S side does not match the angle θ2 formed by the protrusions T1 and T2 on the plug P side, the protrusions T1 and T2 are locked to the tip end surface of the sleeve 2. Therefore, the plug P and the socket S cannot be connected. At this time, the tip of the plug P enters the plug insertion hole 15 of the socket body 1, but does not open the socket-side flow path 19 and the plug-side flow path 30. In addition, an identification member for each color that can distinguish the inner diameter of the plug, the fluid used, and the like is attached at an appropriate position on the outer circumference of the plug.

The valve 22 housed in the plug body 21 is normally urged to the left in the figure by a bellows-shaped spring 24 arranged between the valve holder 22 and the spring holder 23, and the seat provided in the plug body 21 is provided. It is pressed against 25 to close the flow path 30. The spring holder 23 is pressed against a ring 26 fixed to the inner circumference of the plug body 21 by the urging force of the bellows spring 24.

In the plug P and the socket S, the angles formed by the grooves and the protrusions of the identification portions of both are the same, and the plug P of FIG. 3 is fitted deeper into the plug insertion hole 15 of the socket S of FIG. Then, the end surface 22a of the valve 22 of the plug P presses the end surface 10a of the valve 10 of the socket S to open the valve, and the fluid flows through the hole 22b formed in the valve 22. In the figure, 27 is an O-ring, 21c is a spanner hook, and 21d is a threaded portion for pipe connection.

Next, the work of connecting the socket and the plug will be described. In order to engage the plug P of FIG. 3 with the plug insertion hole 15 of the socket S of FIG. 1, first, the plug P and the socket S group in the mixed state have the same color identification portion, or the protrusion and the groove make the same angle. Take out the plug and socket. If both the color identification part and the groove or protrusion identification part are provided on the plug and socket respectively, first find the plugs and sockets of the same color in the mixed state and find the corresponding plug. You can easily find the socket. Then, while rotating the sleeve 2, the notch position of the sleeve 2 is aligned with the punch mark formed on the protrusion of the plug, the sleeve 2 is moved to the left against the coil spring 5, and the plug P is inserted. . At this time, since the angle formed by the groove on the socket side and the angle formed by the protrusion on the plug side are the same, the plug P fits deeply into the socket S. At the same time, the ball 7 fits into the recess 29 formed in the plug P. Then, when the sleeve 2 is released, the sleeve 2 is pushed back by the coil spring 5, the ball 7 is pushed by the ball holding portion 6, and the plug P does not come out.

On the other hand, the flow paths are communicated as follows. That is, when the end face 10a of the valve 10 on the socket side is pushed by the end face 22a of the valve 22 of the plug P, the valve 10 moves to the left in the figure against the biasing force of the bellows-shaped spring 12, and the socket body 1 The seat 1b provided in the valve is opened, and the fluid flows through the hole 10b formed in the valve 10. Also on the plug P side, since the end surface 22a of the valve 22 is pushed by the end surface 10a of the valve 10 of the socket S, the valve 22 is opened and the fluid flows through the hole 22b formed in the valve 22 (see FIG. 5). reference).

As described above, according to the present invention, the sleeve rotatably attached to the socket body is formed with two grooves having different inner diameters of the socket or different angles for indicating the fluid to be used, and the inner diameter is provided on the plug side. Two protrusions that indicate the size or the fluid to be used and that form different angles are formed so that the socket and plug cannot be connected unless they match. Also, when connecting the socket and plug, you can align the groove of the sleeve and the protrusion of the plug by simply rotating the sleeve, and connect the socket and plug regardless of how they are attached to the pipe. can do. Further, since the notch is provided in one of the grooves of the sleeve and the protrusion corresponding to the notch on the plug side is formed with a mark, the alignment between the groove and the protrusion can be facilitated. That is, since there are two grooves and two protrusions, it is possible to easily determine which groove and which protrusion can be combined to connect the socket and the plug.

In the above embodiment, the identification portion on the plug side is non-rotatable, the sleeve on the socket side is rotatable, and the identification portion of the plug and the sleeve are identified by rotating the sleeve. It is designed to be aligned with the parts, but contrary to the embodiment, the identification part on the plug side can be rotated, the sleeve on the socket side cannot be rotated, or both the identification parts can be rotated. You can also Further, the identification portion is not limited to the groove and the projection, and may be a polygonal shape, or the socket side may be the projection and the plug side may be the groove. Further, the present invention can be implemented in various other forms without departing from the spirit or main characteristics thereof, and the above-mentioned embodiments are merely exemplifications in all respects and should not be construed in a limited manner. .

[0028]

[Effect of device]

 As described in detail above, according to the present invention, the sleeve rotatably mounted on the socket body is formed with two grooves having different inner angles and different angles that can determine the fluid to be used, In addition, the plug side has two protrusions with different inner diameters or different angles that can be used to discriminate the used fluid so that the socket and plug cannot be connected unless the two agree. If you look at the outer diameter as you can see, the inner diameter is not known, or you do not know which fluid it is for.Connect the socket and plug, and later notice that the inner diameter differs from each other. It is possible to prevent accidents such as incomplete use of the joint, use with incomplete seals, and mixing of different fluids. When connecting the socket and plug, the groove of the sleeve and the protrusion of the plug can be aligned simply by rotating the identification part, and the socket and plug can be connected regardless of the mounting state on the pipe. Can be connected. It is possible to achieve excellent effects such as.

[Brief description of drawings]

FIG. 1 is a side view showing an upper half of a socket S as a sectional view.

FIG. 2 is a front view and a side view of a sleeve provided in a socket.

FIG. 3 is a side view showing an upper half of a plug P as a sectional view.

FIG. 4 is a side view and a front view of a plug.

FIG. 5: Socket S and plug P of the pipe joint according to the present invention
It is the side view which made the upper half the cross-sectional view which shows the connection state with.

FIG. 6 is a side view of an upper half of a socket S and a plug P in a conventional pipe joint as a cross-sectional view.

[Explanation of symbols]

 P Plug S Socket 1 Socket body 1a Tapered hole 4 Sleeve 5 Coil spring 6 Ball retainer part 6a Ball escape part 7 Ball 10 Valve 11 Spring holder 12 Bellows spring 21 Plug body 22 Valve 23 Spring holder 24 Bellows spring M1, M2 identification Part (groove) T1, T2 Identification part (projection)

Claims (1)

[Scope of utility model registration request] 1. A pipe joint in which a plug and a socket are connected to each other to form one set, and an identification member having an identification portion having a different inner diameter shape is rotatably formed in the socket in the socket. On the outer periphery of the plug, an identification portion having an outer diameter shape that matches the inner diameter shape of the identification portion on the socket side is formed at a position corresponding to the identification portion. A pipe joint characterized in that only a plug whose outer diameter shape of an identification portion formed on the outer periphery is matched can be inserted into the socket.