JP3096653B2 - Pipe fitting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joint device including a socket and a plug, the socket having a centering action.

[0002]

2. Description of the Related Art As a pipe joint device used for piping equipment for flowing a liquid or gas in industrial production equipment,
A plurality of sockets are arranged horizontally and in parallel on a base, a plurality of plugs movable in a direction of connection and disconnection with these plurality of sockets are provided opposite each socket, and a pneumatic cylinder for moving the plurality of plugs There is a drive mechanism provided with such a drive mechanism. Each socket and each plug are connected to the piping. In other words, this pipe joint device connects and disconnects the pipes by moving each plug forward by a driving mechanism and connecting it to each opposed socket, and moving each plug backward by a driving mechanism to disengage from each socket. It is.

In this pipe joint device, for example, in a piping system of a hydraulic circuit in a machine driven by hydraulic pressure, each socket is connected to a pipe on the machine side, and each plug is connected to a pipe on a circuit side for supplying pressure oil. Used for applications.

In this pipe joint device, it is necessary to move each plug on the center axis of each socket in order to move each plug forward and backward to smoothly and reliably connect and disconnect from each socket. . That is, it is necessary that the plug can be accurately connected at a predetermined position without stopping when the plug collides with the socket when the plug is connected to the socket, and that the plug does not collide with the socket when the plug is detached.

[0005] However, due to the processing error and the assembly error of the plug and socket, there is a case where the opposing plug and socket are not located on the same axis. In this case, the plug may not be able to be smoothly and reliably connected to and disconnected from the socket.

Therefore, conventionally, a configuration is adopted in which a socket is held from the periphery thereof by elastic rubber and the socket is provided so that its center axis can be freely tilted and displaced. That is, when the plug moves forward and comes into contact with the socket in a state of being off the center axis of the socket or inclined, the rubber held by the rubber is elastically deformed by being pushed by the plug that moves forward. Then, the socket is displaced so as to be aligned with the center axis of the plug by utilizing the elastic deformation of the rubber. By holding the socket in such a manner that the socket is centered, the plug and the socket can be connected and positioned on the same central axis.

[0007]

However, the elasticity of the rubber holding the socket deteriorates entirely or partially as the plug and the socket are repeatedly connected to and disconnected from the plug, and the entire rubber is soft and uniform. Elastic deformation is not possible.
For this reason, the rubber cannot hold the socket with a uniform elastic force in the entire circumferential direction of the socket, and when an external force is applied to the socket by contact of the plug, the socket is flexibly displaced according to the direction and magnitude of the external force. You will not be able to do it.

Finally, even if the plug moves forward and comes into contact with the socket, the socket cannot be displaced and the plug cannot be inserted and connected inside the socket. As described above, the rubber that holds the socket so as to perform the centering action has a low durability, and cannot provide the socket with a stable centering action for a long period of time. Therefore, there is a problem in the reliability of the pipe joint device. .

The present invention has been made in view of the above circumstances, and has an excellent reliability in that a stable alignment operation can be provided to a socket for a long period of time so that a plug and a socket can be connected and disconnected well. An object of the present invention is to provide a pipe fitting device.

[0010]

According to a first aspect of the present invention, there is provided a pipe coupling device comprising: a socket body having a body passage; a socket having a valve provided in the fluid passage of the socket body for always closing the fluid passage; A plug body having a passage and being removably inserted into and connected to the inside of the socket body, and a fluid passage provided in the fluid passage of the plug body which is always closed, and the plug body is inserted and connected inside the socket body. A plug having a valve that also opens itself by opening the valve of the socket body in a state where the socket body is inserted, a socket holder having an insertion portion through which the socket body is inserted, and a metal coil spring that is formed in an annularly curved shape. It is located at the insertion portion of the socket holder and surrounds the socket body in the entire circumferential direction and contacts the outer peripheral surface of the socket body. And a metal coil spring ring for holding the socket body, wherein an annular groove is formed in the entire outer circumferential surface of the socket body in the circumferential direction, and the metal coil spring ring is fitted in the annular groove. It is characterized by.

According to the configuration of the first aspect of the present invention, the metal coil spring ring can maintain uniform elasticity over the entire circumferential direction of the socket body for a long period of time, so that the socket has a stable centering action for a long period of time. The plug and socket can be satisfactorily connected and disconnected by holding and holding, and a pipe joint device with excellent reliability can be obtained.

According to the structure of the first aspect of the present invention, the socket body is stably held by the metal coil spring ring fitted in the annular groove formed on the entire outer circumferential surface of the socket body in the circumferential direction. A better aligning action can be given to the socket.

According to a second aspect of the present invention, there is provided a pipe joint device having a socket body having a fluid passage, a socket provided in the fluid passage of the socket body and always closing the fluid passage, the socket having a fluid passage and the socket. A plug body that is removably inserted into and connected to the inside of the body, and the socket body that is provided in the fluid passage of the plug body, always closes the fluid passage, and inserts and connects the plug body inside the socket body. A plug having a valve that also opens itself by opening the valve, a socket holder having an insertion portion through which the socket body is inserted, and a peripheral portion of the socket holding member on the outer peripheral side of the insertion portion in the circumferential direction. Plural pieces that are provided in a dispersed manner and contact the outer peripheral surface of the socket body to apply elastic force to the socket body and hold the socket body. A first elastic holding means, and a plurality of first elastic holding means which are spaced apart from the plurality of first elastic holding means in the socket holder and are provided on the outer peripheral side of the insertion portion in the circumferential direction at positions separated from the plurality of first elastic holding means. A plurality of second elastic holding means that contact the outer peripheral surface of the socket body to apply elastic force to the socket body and hold the socket body; the plurality of first elastic holding means and the plurality of first elastic holding means; The second elastic holding means is located at a position where they do not overlap with each other in the circumferential direction.

According to the second aspect of the present invention, the plurality of first elastic holding means and the plurality of second elastic holding means maintain uniform elasticity over the entire circumferential direction of the socket body for a long time. As a result, the socket and the socket can be favorably connected and disconnected by providing the socket with a stable aligning action for a long period of time, and the reliability of the pipe joint device can be improved. In particular, since the first elastic holding means and the second elastic holding means are arranged in the axial direction of the socket body, the socket can be reliably returned to a horizontal state after the plug is detached.

According to the configuration of the second aspect of the present invention, the plurality of first elastic holding means and the plurality of second elastic holding means are located at positions not overlapping with each other in the circumferential direction. The socket body can be more stably held in the circumferential direction by the elastic holding means.

According to a third aspect of the present invention, in the pipe joint device according to the second aspect, the plurality of first elastic holding means and the plurality of second elastic holding means are arranged in a radial direction of the insertion hole. A pin that is movable along the outer peripheral surface of the socket body, an elastic body that applies an elastic force to the pin toward the socket body, and a pressing member that presses the elastic body. Features. According to the structure of the present invention, each elastic holding means can be provided with an appropriate structure.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. In this embodiment, a socket is held by an annular metal coil spring (hereinafter, referred to as a coil spring ring).

FIG. 1 is a view showing a state in which a socket and a plug are connected, FIG. 2 is a view showing a socket, and FIGS. 3 and 4 are views showing a plug. In the figure, 1 is a socket, and 2 is a plug. A plurality of sockets 1 are provided in parallel on a base (not shown), and a plurality of plugs 2 are provided facing each socket 1. Each plug 2 is provided so as to be movable in a direction of approaching and separating from each socket 1, and is connected to and disconnected from each socket 1.

The socket 1 will be described with reference to FIG. Reference numeral 11 denotes a cylindrical socket main body, and an inner hole thereof serves as a fluid passage. A valve 12 is provided at the center of the fluid passage of the socket main body 11, and one end inside is a plug receiving portion 11a.

Next, the valve 12 will be described. Numeral 13 denotes a round rod-shaped valve element, which is inserted and held by a holder 14 fixed inside the socket body 1 so as to be movable in the axial direction. The holder 14 is a cylindrical portion 14 that holds the valve body 13.
a and a plurality of blades 1 provided radially around the cylindrical portion
4b, and the gap between the blades 14b is a passage through which the pressure oil flows. Plug receiving portion 11a of valve body 13
The tip, which is the side end, is a tapered portion 1 with a packing 15.
3a, and the valve body 1 is provided inside the socket body 11.
The protrusions 11b are formed such that the tapered portions 13a come into contact with and separate from each other due to the movement of the protrusions 3a. The valve element 13 is
A force is applied to the plug receiving portion 11a by a compression coil spring 17 disposed between the collar 16 and the holder 14 fitted on the taper portion 13a.
a is in contact with the ridge 11b.

The plug receiving portion 11a of the socket body 11 is provided with two seal rings 18 fitted therein, and becomes smaller toward the inner peripheral side formed at a plurality of positions in the circumferential direction of the plug receiving portion 11a. Balls 20 are respectively arranged in the tapered holes 19. A sleeve 21 is provided on the outer peripheral portion of the socket body 11 corresponding to the plug receiving portion 11a so as to be movable in the axial direction. The sleeve 21 receives a force of a compression coil spring 22 arranged on the outer peripheral portion of the socket body 11. Displaced toward the end of the socket body 11. In this state, the sleeve 21 presses each ball 20 from the outside and protrudes from the plug receiving portion 11a of the socket body 11. Reference numeral 23 denotes a stopper ring for restricting the movement of the sleeve 21 pressed by the compression coil spring 22.

The plug 2 will be described with reference to FIG. Reference numeral 31 denotes a cylindrical plug body, and a hole inside the plug body serves as a fluid passage. An annular groove 31a with which the ball 20 provided in the socket 1 is engaged is formed at the center of the outer peripheral portion of the plug body 31, and a tapered ridge 31b is formed at the opening end of the socket insertion side. . A valve 32 is provided at the center of the fluid passage of the plug body 31.

The valve 32 will be described. Numeral 33 denotes a round rod-shaped valve element, which is inserted and held by a holder 34 fixed inside the plug main body 31 so as to be movable in the axial direction. The holder 34 is a cylindrical portion 34 for holding the valve body 33.
a, and a plurality of blades 34b radially provided around the cylindrical portion. The gap between the blades 34b is a passage through which the pressure oil flows. The distal end, which is the socket insertion side end of the valve element 33, has a tapered portion 33 a provided with a packing 35.
It has become. A force is applied to the valve body 33 toward the distal end by a compression coil spring 37 disposed between the collar 36 fitted to the valve body 33 and the holder 34, and the force constantly applies the tapered portion 33a. Is in contact with the ridge 31b. Thereby, the valve 32 closes the fluid passage of the plug body 31.

The above-described socket 1 is held by the following configuration. That is, in FIG.
Reference numeral 1 denotes a socket holder, and this socket holder 51 is mounted upright on a base (not shown). The socket holder 51 has a circular insertion hole 52 having a diameter larger than the outer shape of the socket body 11. The socket body 11 is inserted into the insertion hole 52 along the horizontal direction from one side to the other side of the socket holder 51, and a substantially central portion in the length direction is located inside the insertion hole 52. A flange 41 is formed on an outer peripheral portion of the socket main body 11 to be in contact with one side surface (a side surface on the socket insertion side) of the socket holder 51. The stopper plate 42 that comes into contact is fitted, and the stopper plate 42 is locked by a locking C-ring 43. Thus, the socket body 11 is held while preventing the socket body 11 from coming out of the insertion hole 52.

As shown in FIG. 4, an annular groove 44 is formed in the outer peripheral portion of the socket body 11 located inside the insertion hole 52 along the circumferential direction. A coil spring 45 is provided by fitting. The metal coil spring ring 45 is formed by forming a coil spring made of a metal such as stainless steel into an annular shape. That is, a coil spring having a uniform outer shape as a whole is formed into a circular shape having an inner diameter corresponding to the diameter of the annular groove 44 by bending the coil spring into a circular shape.

The coil spring is formed in an annular shape and the ends of the therapy are connected and fixed by brazing or mechanical connection. The outer diameter of the ring of each coil of the coil spring forming the metal coil spring ring 45 is smaller than the width of the annular groove 44 and larger than the depth of the annular groove 44. Metal coil spring 4
In order to fit 5 into the annular groove 44 of the socket body 11,
For example, the completed metal coil spring ring 45 is expanded by elasticity, and the metal coil spring ring 45 is passed through the socket body 11 again.
5 may be restored to the original state by elasticity and fitted into the annular groove 44.

The insertion hole 52 of the socket holder 51
Is set smaller than the outer diameter of the metal coil spring ring 45. The socket body 11 is inserted through the insertion hole 52 with the metal coil spring 45 fitted in the annular groove 44. FIG.
The outer diameter of the metal coil spring ring 45 is larger than the outer diameter of the socket body 11 as shown by the broken line in FIG. For this reason, the annular groove 4
When 4 enters insertion hole 52, metal coil spring 45 fitted in annular groove 44 is pushed into insertion hole 52. The metal coil spring 45 is inserted into the insertion hole 52
The outer diameter of the coil is reduced by being pressed by the inner peripheral surface of the metal coil spring, and the ring of each coil is elastically deformed in an elliptical shape so as to expand in the axial direction of the metal coil spring ring 45. As a result, the ring of each coil of each coil spring of the metal coil spring ring 45 is pressed against the bottom surface and both side surfaces of the annular groove 44 with elastic force and is pressed against the inner peripheral surface of the insertion hole 52 with elastic force. Thus, the socket body 11 is held horizontally by the metal coil spring ring 45.

The metal coil spring ring 45 is held uniformly throughout the circumferential direction inside the insertion hole 52 by the loop of each coil being continuously arranged in the circumferential direction.
A uniform force can be applied to the socket body 11 along the diametric direction and the axial direction over the entire circumferential direction.
In particular, by fitting the metal coil spring ring 45 into the annular groove 44 formed in the socket body 11, the metal coil spring ring 45 can be stably and reliably held, and the force of the metal coil spring ring 45 is By acting on the socket body 11 in opposite directions along the axial direction via the side surfaces on both sides, the socket body 11 can be held more stably.

In this manner, a plurality of socket bodies 11
The other end of the socket body 11 is connected to a flexible hose (not shown), which can be freely tilted and displaced and held by the socket holding body 51.
It can respond to the tilt displacement of the socket body 11. This hose is connected, for example, to a machine driven by hydraulic pressure.

The plug 2 is arranged on the center axis of the socket body 11 so that the tip of the valve body 33 faces the plug receiving portion 11a of the socket body 11, and is held by a moving body (not shown) provided on the base. . The moving body is moved along the center axis direction of the socket body 11 by, for example, an air cylinder, and the plug 2 is moved together with the moving body in a direction approaching and separating from the socket 1. Plug body 31
Is connected to a flexible hose which is connected, for example, to a circuit for supplying pressure oil. Thus, a plurality of plugs 2 are provided.

When the plug 2 is connected to the socket 1, the sleeve 21 is connected to the socket 2 in each socket 1.
2 is moved backward against the force against the hole 1 of the socket body 11.
The ball 20 provided at 9 is made free. Each plug 2
Is moved forward to approach the socket 1, each plug 2 is moved forward, and the tip of the plug body 31 is inserted into the plug receiving portion 11 a of the socket body 11. The tip is brought into contact with the valve 13 of the valve 12 in each socket 1.

Further, each plug 2 is moved, and the valve body 33 of the valve 32 in each plug 2 and the valve body 13 of the valve 12 in each socket 1 are pushed back against the spring forces of the springs 37 and 17, respectively. Plug the valve bodies 32 and 12 into the plug body 11
From the ridge 11b of the socket body 31. As a result, the valves 32, 12 are connected to the plug body 31,
The fluid passages of the socket body 11 are respectively opened.

Each ball 20 of the socket body 11 fits in the annular groove 31a of the plug body 31. Socket 1
When the sleeve 21 is released, the sleeve 21 pressed by the spring 22 moves forward and presses each ball 20 from the outside to connect the plug body 31 to the socket body 11.

Accordingly, the oil of the hydraulic circuit is discharged from the plug body 3
1 fluid passage, valve 32, socket body 11 and valve 12
Flow through. Here, when the plug 2 is accurately positioned on the central axis of the socket 1, the plug main body 31 is smoothly inserted into the socket main body 11 without being collided with the socket main body 11, and connected.

However, there is a case where the opposing plug 2 and socket 1 are not located on the same center axis line due to a processing error and an assembly error of the plug 2 and the socket 1.
For example, when the position of the plug 2 is parallel to the center axis of the socket 1 at a distance of, for example, 0.3 mm, when the plug 2 is moved forward, the distal end of the plug main body 31 becomes the plug receiving portion 11a of the socket main body 11. Collides with the peripheral edge of the opening. Further, when the plug 2 is moved forward, the socket main body 11 is pushed by the tip of the plug main body 31, and is inclined toward the plug main body 31 with the metal coil spring ring 45 as a fulcrum.

Then, as the plug 2 further moves forward, the socket body 1 is displaced so as to be located on the center axis of the plug body 31. In this case, the socket main body 11 is pressed by the plug main body 31, and a part of the metal coil spring ring 45 is pressed against the inner peripheral surface of the insertion hole 52 of the holding body 51 to be elastically compressed and deformed. Is displaced to be located on the central axis of As a result, the socket body 11 is positioned on the same central axis as the plug body 31, and is inserted into the receiving portion 11a of the socket body 11 without disturbing the tip of the plug body 31.

Thus, even when the plug 2 and the socket 11 are not located on the same central axis, as in the case where the plug 2 is accurately located on the central axis of the socket 1,
The plug body 31 can be smoothly inserted into and connected to the socket body 11 without colliding with the socket body 11.

When the plug main body 31 is pulled out of the socket main body 11, the metal coil spring ring 45 returns to the original horizontal position again by the elastic action. According to such a configuration, the metal coil spring ring 45 formed by a metal coil spring holds the socket body 11 by exerting uniform elasticity over the entire circumferential direction, so that the plug 2 and the socket 1 are the same. Even if it is not on the center axis,
The socket body 11 can be tilted and displaced flexibly according to the position of the plug 2 to perform the centering operation reliably and smoothly. Even if the connection and disconnection of the plug 2 and the socket 1 are repeatedly performed, the metal coil spring ring 45 has a stable centering action on the socket 1 over a long period of time, so that the plug 2 and the socket 1 can be satisfactorily held. It can be connected and disconnected, and the reliability of the pipe joint device can be increased.

Further, an annular groove 44 is formed on the entire outer peripheral portion of the socket body 11 in the circumferential direction, and the metal coil spring ring 45 is fitted in the annular groove 44.
The socket body 11 can be stably held by the metal coil spring ring 45 as compared with a case where the socket is not provided, and a better centering action can be imparted to the socket.

A second embodiment of the present invention will be described with reference to FIGS. In this embodiment, the socket is held by two sets of elastic holding means provided side by side in the axial direction.

FIG. 5 is a view showing a state where the socket and the plug are connected, FIG. 6 is a view showing the socket, and FIG. 7 is a view showing FIGS.
FIG. 8 is a sectional view showing the socket along the line, and FIG. 8 is a view showing the plug.

In FIG. 5, reference numeral 61 denotes a socket, and 62 denotes a plug. As in the first embodiment, a plurality of sockets 61 are provided in parallel with each other, and each plug 62 is provided so as to be movable toward and away from each socket 61.

The socket 61 will be described with reference to FIG. Reference numeral 71 denotes a cylindrical socket main body, and an inner hole thereof serves as a fluid passage. The socket body 7
1 is configured by screwing and combining three short cylindrical bodies 711, 712 and 713. 714 is a cylindrical body 77
This is a seal ring provided at the joint between the cylindrical member 712 and the cylindrical body 712.

A valve 72 is provided at the center of the fluid passage of the socket body 71, and one end (the right end in the figure) serves as a plug receiving portion inside. The valve 72 will be described. Numeral 73 denotes a round rod-shaped valve element, which is inserted and supported by a holder 74 fixed inside the socket body 1 so as to be movable in the axial direction. Holder 74 is valve element 73
And a plurality of blade portions 74b radially provided around the cylindrical portion, and a gap between the blade portions 74b is a passage through which the pressure oil flows.

The distal end of the valve body 73 is a tapered portion 73a provided with a packing 75. Inside the socket body 71, there is provided a stopper projection 71a with which the tapered portion 73a comes into contact and separates by the movement of the valve body 73. Is formed. Valve element 7
3 is a compression coil spring 7 arranged between the holder 74
6, a force is applied to the plug receiving portion, and the taper portion 73a is constantly in contact with the ridge portion 71a by this force.

Two seal rings 77 are fitted in the plug receiving portion of the socket body 71. The plug 62 will be described with reference to FIG. Reference numeral 81 denotes a cylindrical plug main body, and an inner hole thereof serves as a fluid passage. The plug body 81 has three short cylindrical bodies 8.
11, 812 and 813 are screwed and combined. Reference numeral 814 denotes a seal ring provided at a joint between the cylindrical body 811 and the cylindrical body 812.

The plug body 81 has a tapered ridge 81a formed at the opening end on the socket insertion side.
A valve 82 is provided at the center of the fluid passage of the plug body 81. The valve 82 will be described. Numeral 83 denotes a round rod-shaped valve element, which is inserted and supported by a holder 84 fixed inside the plug body 81 so as to be movable in the axial direction. The holder 84 includes a cylindrical portion 84a that holds the valve element 83,
A plurality of blade portions 84b radially provided around the cylindrical portion
The gap between the blades 84b is a passage through which the pressure oil flows.

The valve element 83 has a tapered portion 83a provided with a packing 85 at a tip end on the socket insertion side end. A force is applied to the distal end of the valve body 83 by a compression coil spring 87 disposed between the valve body 83 and the holder 84, and the taper portion 83a is constantly in contact with the ridge 81a by this force. Thus, the valve 82 closes the fluid passage of the plug body 81.

A configuration for holding the above-described socket 61 will be described with reference to FIG. That is, in the drawing, reference numeral 91 denotes a circular holder, and an insertion hole 92 larger than the maximum outer diameter of the socket body 81 is formed in the holder 91. The holder 91 is mounted on a base (not shown) such that the axis of the insertion hole 92 is horizontal. The socket body 81 is inserted through the insertion hole 92 from one side surface to the other side surface of the holding body 91 along the horizontal direction. The socket body 81 is held by a holding body 91 by holding plates 93 and 94 fitted and attached to the outer peripheral portion so as not to come out of the insertion hole 92.

The holding body 91 has a plurality of first through holes 92 formed therein.
Elastic holding means 101 and a plurality of second elastic holding means 10
2 are provided at an interval in the axial direction of the insertion hole 92. That is, the plurality of first elastic holding means 101 are radially arranged around the insertion hole 92 at intervals in the circumferential direction, and the plurality of second elastic holding means 102 are connected to the first elastic holding means 101. On the other hand, at a position spaced apart in the axial direction of the insertion hole, the plurality of first elastic holding means 101 are arranged radially around the insertion hole 92 so as to be alternate with each other. .

Each of the first elastic holding means 101 and each of the second elastic holding means 102 have the same structure, and this structure will be described by taking the first elastic holding means 101 as an example. A hole 103 penetrating between the outer peripheral surface and the inner peripheral surface (insertion hole 92) of the holder is formed in the holder 91, and is formed radially around the insertion hole 92 at intervals in the circumferential direction. . Each hole 1
A guide pin 104 is movably inserted into an inner end portion of the socket body 03, and the tip end of the guide pin 104 projects from the hole 103 into the insertion hole 92 and contacts the outer peripheral surface of the socket body 71. The tip is spherical. A compression coil spring 105 is inserted into the hole 103 outside the holding member with respect to the guide pin 104, and one end of the compression coil spring 105 is in contact with the base end surface of the guide pin 104. The outer end of the hole 103 is a threaded portion, and a stopper screw 106 is screwed into the threaded portion.
5 is pressed at the other end. In each of the first elastic holding means 101, the guide pin 104 is pressed toward the insertion hole 92 under the force of the compression coil spring 105, and the guide pin 104 is pressed.
Project from the insertion hole 92. For this reason, the distal end of the guide pin 104 of each first elastic holding means 101 comes into contact with the outer peripheral surface of the socket main body 71 inserted into the insertion hole 92 at a position spaced apart in the circumferential direction, and the socket The main body 71 is supported by applying elastic force. When an external force is applied to the socket body 71, one of the guide pins 104 of each of the first elastic holding means 101 compresses the compression coil spring 105 according to the direction and the magnitude of the external force while the hole 92 is compressed.
The socket body 71 can be tilted and displaced by an appropriate amount toward the outside of the holding body 91 along the line. The magnitude of the force of the compression coil spring 105 pressing the guide pin 104 can be adjusted by adjusting the screwing position of the stopper screw 106.

Each second elastic holding means 102 has the same configuration as each first elastic holding means 101. That is, the holes 103 of the respective second elastic holding means 102 are formed so as to be shifted from each other in the circumferential direction with respect to the holes 103 of the respective first elastic holding means 101, and each hole 103 has A guide pin 104, a compression coil spring 10, and a stopper screw 106 are provided. For this reason,
In each of the second elastic holding means 102, at a position different from the guide pin 104 of each of the first elastic holding means 101, the tip of the guide pin 104 is attached to the outer peripheral surface of the socket body 71 inserted into the insertion hole 92. On the other hand, the socket body 71 is contacted at a position spaced apart in the circumferential direction to apply elastic force to support the socket body 71.

Thus, each first elastic holding means 10
The socket body 71 is always and stably held in a horizontal state by elastically holding the socket body 71 from the entire circumferential direction at two locations separated in the axial direction by the first and second elastic holding means 102. In addition, it is held so that it can be freely tilted and displaced according to external force. Further, since the plurality of first elastic holding means 101 and the plurality of second elastic holding means 102 are located so as not to overlap with each other in the circumferential direction with respect to the socket main body 71, the socket main body 71 is further circumferentially moved. It can be stably held in all directions.

In this manner, the plurality of sockets 61 are held by the socket holder 91 so that they can be freely tilted and displaced without being restricted in the direction.
Although not shown, a flexible hose (not shown) is connected to the other end of 1 so that the socket body 71 can cope with the tilt displacement. In addition, the plug 62 is
Are arranged on the central axis of the socket main body 71 such that the front end of the socket faces the plug receiving portion of the socket main body 71, and is held by a moving body (not shown) provided on the base. The moving body is moved along the center axis direction of the socket main body 71 by, for example, an air cylinder, and the plug 62 is moved together with the moving body in a direction approaching and separating from the socket 61. A flexible hose is connected to the other end of the plug body. This hose is connected, for example, to a circuit for supplying pressure oil. Thus, the plurality of plugs 62 are provided.

When connecting the plugs 62 to the sockets 61, the plugs 62 are moved forward to approach the sockets 61, and the plugs 62 are moved forwards so that the distal end of the plug body 81 is connected to the socket body 71. It is inserted into the plug receiving portion, and the tip of the valve element 83 of the valve 82 of each plug 62 is brought into contact with the valve element 73 of the valve 72 of each socket 61. Further, when each plug 62 is moved, the valve element 83 of the valve 82 in each plug 62 and the valve element 73 of the valve 72 in each socket 61 are respectively resiliently connected to the springs 86 and 76.
The valve elements 83 and 73 are pushed back against the spring force of the plug body 81 and the ridges 71a of the socket body 71.
Separate each from a. Thus, the valves 82 and 72 open the fluid passages of the plug body 81 and the socket body 71, respectively. The oil of the hydraulic circuit flows through the fluid passage of the plug body 81, the valve 82, the fluid passage of the socket body 71, and the valve 72.

Here, when the plug 62 is accurately positioned on the central axis of the socket 61, the plug body 81 is smoothly inserted into the socket body 71 without collision and is connected thereto.

When the opposing plug 62 and socket 61 are not located on the same central axis due to the processing error and assembly error of the plug 62 and socket 61, for example, the position of the plug 62 is slightly away from the central axis of the socket 61. When the plug 62 is moved forward and parallel, the distal end of the plug body 81 collides with the peripheral edge of the opening of the plug receiving portion of the socket body 71. Further, when the plug 62 is moved forward, the socket body 71 is pushed in a direction inclined with respect to the horizontal axis. In this case, the socket body 7
When an external force is applied to the first elastic holding member 1, any one of the guide pins 104 of each of the first elastic holding means 101 and each of the first elastic holding means 102 compresses the compression coil spring 105 in accordance with the direction and magnitude of the external force. Holding body 91 along hole 103
The socket body 71 can be tilted by moving the socket body 71 by an appropriate amount toward the outside. For this reason, the socket main body 71 pressed by the plug main body 81 is flexibly tilted and displaced. Then, as the plug 62 further moves forward, the socket main body 71 is displaced so as to be located on the center axis of the plug main body 81.

As a result, the socket main body 71 is located on the same central axis as the plug main body 81, and the receiving portion 7 of the socket main body 71 is not hindered by the distal end of the plug main body 81.
1a. In this way, even when the plug 62 and the socket 61 are not located on the same central axis, the plug main body 81 is connected to the socket main body 7 like the case where the plug 62 is accurately located on the central axis of the socket 61.
1 and can be smoothly inserted into the inside without collision.

When the plug body 81 is extracted from the socket body 71, the socket body 71 is separated from the socket body 71 in the axial direction.
By the first elastic holding means 101 and the second elastic holding means 102 elastically holding the socket body from the entire circumferential direction, the socket body 71 is quickly and surely returned to the horizontal position. By always holding the socket 61 stably and horizontally, the plug 62 can be inserted into the socket 61 when the plug 62 is located on the same central axis as the socket 61.

According to such a configuration, even when the plug 62 and the socket 61 are not located on the same center axis, the socket body can be moved by the plurality of first elastic holding means 101 and the second elastic holding means 102. The reference numeral 71 flexibly corresponds to the position of the plug 62 and can be tilted and displaced to perform the centering operation reliably and smoothly. Then, uniform elasticity is maintained over the entire circumferential direction of the socket main body 71 for a long period of time, and the socket 61 is provided with a stable centering action for a long period of time, so that the plug 62 and the socket 61 are connected and disconnected well. Therefore, the reliability of the pipe joint device can be improved.

In particular, since the first elastic holding means 101 and the second elastic holding means 102 are arranged in the axial direction of the socket 61, the plug 62 is surely returned to a horizontal state after being detached from the socket 61. Can be.

Further, each of the first elastic holding means 101 and each of the second elastic holding means 102 are
By forming a guide pin 104, a compression coil spring 105, and a stopper screw 106 in the hole 103, each elastic holding means 101, 102 can be provided with an appropriate structure. The present invention is not limited to the above-described embodiment, but can be implemented with various modifications.

[0063]

According to the pipe joint device of the first aspect of the present invention, the metal coil spring ring can maintain uniform elasticity over the entire circumferential direction of the socket body for a long period of time, so that the metal coil spring ring is stable with respect to the socket for a long period of time. The plug and the socket can be satisfactorily connected and disconnected by providing the centering action, and the reliability can be improved. Further, according to the present invention, the socket body is stably held by the metal coil spring ring fitted in the annular groove formed over the entire outer circumferential surface of the socket body in the circumferential direction, and a better centering action is provided on the socket. Can be given.

[0064] According to the pipe joint apparatus of the invention of claim 2, Seo
By the plurality of first elastic holding means and the second elastic holding means provided on the holder, uniform elasticity is maintained over the entire circumferential direction of the socket body for a long time, and the socket is stable for a long time. The plug and socket can be connected and disconnected satisfactorily by having
The reliability of the pipe joint device can be improved. In particular, the first elastic holding means and the second elastic holding means are connected to the socket holder.
Since the plugs are arranged in the axial direction of the socket body, the plug can be reliably returned to a horizontal state after being detached from the socket. Further, according to the present invention, since the plurality of first resilient retaining means and a double several second elastic holding means in a position that does not overlap each other in the circumferential direction,
The socket body can be more stably held in the circumferential direction by both elastic holding means.

According to the third aspect of the present invention, each elastic holding means can be provided with an appropriate configuration.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view showing a pipe joint device according to a first embodiment.

FIG. 2 is a partially cutaway front view showing the socket of the pipe joint device according to the embodiment.

FIG. 3 is a partially cutaway front view showing a plug of the pipe joint device according to the embodiment.

FIG. 4 is a diagram showing a metal coil spring ring of the pipe joint device according to the embodiment.

FIG. 5 is a partially cutaway front view showing a pipe joint device according to a second embodiment.

FIG. 6 is a partially cutaway front view showing the socket of the pipe joint device according to the embodiment.

FIG. 7 is a sectional view showing the socket of the pipe joint device according to the embodiment;

FIG. 8 is a partially cutaway front view showing the plug of the pipe joint device according to the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Socket, 2 ... Plug, 11 ... Socket body, 12 ... Valve, 13 ... Valve body, 14 ... Holder, 15 ... Packing, 17 ... Coil spring, 21 ... Sleeve, 31 ... Plug body, 32 ... Valve, 33 ... Valve body, 34: holder, 35: packing, 37: coil spring, 41: annular groove, 45: metal coil fitting ring, 51: holder, 52: insertion hole, 61: socket, 62: plug, 71: socket Main body, 72 ... Valve, 73 ... Valve, 74 ... Holder, 75 ... Packing, 76 ... Coil spring, 81 ... Plug body, 82 ... Valve, 83 ... Valve, 84 ... Holder, 85 ... Packing, 86 ... Coil spring Reference numeral 91: holding body, 92: insertion hole, 101: first elastic holding means, 102: second elastic holding means, 103: hole, 104: pin 105: spring, 106: stopper screw.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) F16L 37/00-37/62 F16L 39/00-39/06

Claims (3)

(57) [Claims] 1. A socket body having a fluid passage, a socket provided in the fluid passage of the socket body and having a valve that always closes the fluid passage, and a socket having a fluid passage and removably inserted into the socket body. The plug body to be connected and the fluid passage of the plug body are always closed, and the valve of the socket body is opened by inserting and connecting the plug body inside the socket body to open itself. A plug having an operating valve, a socket holder having an insertion portion through which the socket body is inserted, and a metal coil spring which is formed by bending an annular shape and is located at the insertion portion of the socket holder, and the socket body is circular. A metal coil spring that surrounds the entire circumference and presses and contacts the outer peripheral surface of the socket body to hold the socket body A pipe joint device comprising: a ring; and an annular groove formed in the entire outer circumferential surface of the socket body in a circumferential direction, and the metal coil spring ring is compressed and fitted into the annular groove. . 2. A socket having a fluid passage, a socket provided in the fluid passage of the socket body and having a valve mechanism for always closing the fluid passage, and a socket having a fluid passage and being insertable into and removable from the socket body. The plug body to be inserted and connected and the fluid passage provided in the plug body are always closed, and the valve of the socket body is opened and closed by inserting and connecting the plug body inside the socket body. A plug having a valve that also operates to open, a socket holder having an insertion portion through which the socket body is inserted, and a socket holder of the socket body that is provided on the outer peripheral side of the insertion hole in the socket holder and is provided in the circumferential direction. A plurality of first elastic holding means for contacting an outer peripheral surface and applying elastic force to hold the socket main body; The socket holding body is provided on the outer circumferential side of the insertion hole at a position axially separated from the plurality of first elastic holding means in the circumferential direction and is provided in the circumferential direction so as to contact the outer circumferential surface of the socket body. A plurality of second elastic holding means for applying an elastic force to the socket body to hold the socket body; the plurality of first elastic holding means;
Wherein the elastic holding means are positioned so as not to overlap with each other in the circumferential direction. 3. The pin according to claim 1, wherein said plurality of first elastic holding means and said plurality of second elastic holding means are movable along a radial direction of said insertion hole and contact with an outer peripheral surface of said socket body. The pipe joint device according to claim 2, further comprising an elastic body that applies an elastic force to the pin toward the socket body, and a pressing member that presses the elastic body.