JP6894214B2 - Sockets and fittings consisting of sockets and plugs - Google Patents

Description

The present invention relates to a socket that detachably connects the corresponding plugs, and a joint comprising the socket and the corresponding plug. More specifically, the spherical lockers provided in the socket are connected to each other by engaging with the locker engagement groove of the plug, and the spherical lockers are held in the locker engagement groove by the sleeve of the socket to be connected. With respect to sockets and fittings designed to maintain.

Sockets in this type of joint typically include a socket body that has an insertion space into which the plug is inserted and a spherical locker that is displaceably held in the socket body in a locking hole formed in the socket body in the radial direction of the socket body. And a sleeve displaceable on the outer peripheral surface of the socket body in the direction of the longitudinal axis of the socket body. The sleeve has a holding position in which a part of the spherical locker protrudes inward from the inner peripheral surface of the socket body and engages with the locker engagement groove of the plug to hold the socket in the locked position, and a spherical lock. It can be displaced from the release position where the child is displaced outward in the radial direction to allow the plug to be unlocked. When connecting the plug to the socket, the plug is inserted into the insertion space of the socket with the sleeve in the open position, the sleeve is displaced to the holding position, and the spherical locker is engaged with the locker engagement groove. Hold in position. As a result, the plug is connected to the socket. When releasing this connection, pull out the plug from the socket so that the sleeve can be displaced to the release position so that the spherical locker can be displaced to the unlocked position where the engagement with the locker engagement groove is released. To.

For example, when such a joint is used as a pipe joint that connects pipes through which fluid flows, if the sleeve is accidentally displaced from the holding position to the release position in the presence of high-pressure fluid inside, the inside The pressure of the fluid causes the plug to pop out of the socket. Alternatively, when the socket is fixed to the wire rope of the crane device and the suspended load suspended from the plug is lifted and transported with the plug and the socket connected, the socket is suspended while the suspended load is being lifted. If the sleeve is displaced to the released position, the connection between the plug and the socket is suddenly released and the suspended load falls.

In this way, it may be dangerous if an unintended disconnection is performed in a state where a force acting in a direction away from each other is applied between the socket and the plug. Therefore, in order to prevent such disconnection, there is a case in which a locker receiving groove for receiving a spherical locker is formed on the sleeve side of the socket (Patent Document 1). In this joint, when the plug is displaced by receiving a force in the direction away from the socket in the connected state, the spherical locker is pushed outward by the groove surface of the locker engagement groove of the plug and becomes the locker receiving groove on the sleeve side. Engage. As a result, the sleeve interferes with the spherical locker in the direction of the longitudinal axis and cannot be displaced toward the release position. That is, the connection between the socket and the plug cannot be released.

In the joint as shown in Patent Document 1 described above, when the spherical locker is also engaged with the groove on the sleeve side, the sleeve is displaced even if a large force in the direction toward the release position acts on the sleeve. In order to prevent this, the groove surface of the locker receiving groove on the sleeve side that contacts the spherical locker is configured to have a larger inclination angle with respect to the groove surface of the locker engagement groove on the plug side. .. That is, the radial distance from the engagement point between the groove surface on the sleeve side and the spherical locker to the center of the spherical locker is from the engagement point between the groove surface on the plug side and the spherical locker to the center of the spherical locker. It is made smaller than the distance in the radial direction of. By doing so, the spherical locker is pressed radially outward by the force received from the sleeve and the plug. Furthermore, by making the locker holding hole for holding the spherical locker a conical hole whose diameter expands outward in the radial direction, the spherical locker receives a force in the direction of the longitudinal axis. A force is also applied to the outside in the radial direction from the conical inclined surface of the locker holding hole. In order to displace the sleeve to the release position, it is necessary to displace the spherical locker radially inward and push it into the locker engagement groove on the plug side. Since the sandwiched spherical locker receives a large force outward in the radial direction as described above, it is necessary to apply an extremely large force to the sleeve in order to displace the spherical locker inward in the radial direction. Therefore, the sleeve is substantially not disengaged from the spherical locker in the longitudinal axis direction and is not displaced to the release position, and there is a force in the direction away from each other between the socket and the plug. In the working state, the connection cannot be substantially released. To release the connection, push the plug into the socket to release the radial outward pressure on the spherical locker by the locker engagement groove on the plug side, and then displace the sleeve to the release position. There is a need to.

JP-A-2002-340265

In the above-mentioned fittings, the pressure applied to the plug is substantially zero or sufficiently small due to the pressure of the internal fluid being sufficiently low, the suspended load being lowered to the ground or being submerged in water, and the like. Even in a state where there is no problem even if the connection is released in that state, such as when the connection is lost, it is necessary to push the plug into the socket side to release the connection. Such operations are sometimes complicated. For example, in a joint in which the sleeve can be displaced by remote control by using compressed air, a person can directly push the plug into the socket, or such an operation can be performed remotely. It will be necessary to provide yet another mechanism such as. Even if remote control is not performed, the operation of pushing in the plug and the operation of pulling the sleeve must be performed at the same time, and such operation usually requires operation with both hands, so the joint should be placed in a narrow space. Work may be difficult if it is installed.

Therefore, in the present invention, when a large force is applied to the plug, the displacement of the sleeve is prevented to prevent the connection from being disconnected, and when the force on the plug becomes sufficiently small, the plug is not pushed in separately. It is an object of the present invention to provide a socket in which the sleeve is displaced to an open position so that the connection with the plug can be released, and a joint composed of such a socket and the plug.

That is, the present invention
A socket that detachably connects the corresponding plugs
A socket body having a tubular wall portion that defines an insertion space extending rearward from the front end opening, and a locker holding hole that penetrates the tubular wall portion in the radial direction of the tubular wall portion.
A lock that is held in the locker holding hole, projects inward from the inner peripheral surface of the tubular wall portion, engages with the locker engagement groove of the plug inserted into the insertion space, and locks the plug. A spherical locker that is located outside the locking position and is displaceable between the unlocking position that unlocks the plug.
A holding position that is arranged on the outer peripheral surface of the socket body and engages with the spherical locker from the outside in the radial direction to hold the spherical locker at the lock position, and a holding position that is displaced rearward from the holding position to form the spherical shape. A sleeve that is displaceable in the direction of the longitudinal axis of the socket body between the lock and the release position that allows the lock to be displaced to the unlock position.
With
When the spherical locker is in the lock position, the spherical locker is engaged from the inner rear by the groove surface of the locker engagement groove of the plug so as to partially protrude from the outer peripheral surface of the socket body. Has been
The inner peripheral surface of the sleeve engages from the outer front with respect to the spherical locker that partially protrudes from the outer peripheral surface of the socket body when the sleeve is displaced from the holding position toward the releasing position. It has an engaging portion that is adapted to fit, and the engaging portion has a radial distance from the engagement point between the engaging portion and the spherical locker to the center of the spherical locker. Provided is a socket shaped to be greater than the radial distance from the engagement point between the groove surface of the locker engagement groove and the spherical locker to the center of the spherical locker.

In the socket, when the engaging portion of the sleeve engages with the spherical locker at the position as described above, the rearward force applied to the sleeve is spherically locked to the force that pulls the socket rearward into the insertion space. It will be converted efficiently through the child. Therefore, when the force acting between the socket and the plug becomes sufficiently small, a rearward force is applied to the sleeve to push the spherical locker into the locker engagement groove while pulling in the plug, resulting in a spherical shape. It is possible to disengage the locker and the sleeve in the direction of the longitudinal axis so that the sleeve can be displaced from the holding position to the releasing position. That is, in the socket, displacement of the sleeve to the release position is prevented when a large force is applied between the sleeve and the plug in the direction away from each other, and when the force becomes small, the plug is inserted. It is possible to displace the sleeve to the release position with a relatively small force and release the connection without separately performing the operation of pushing it into the space.

Specifically, the engaging portion may be an inclined surface whose diameter expands outward in the radial direction toward the rear.

More specifically
The groove surface is an inclined surface whose diameter expands outward in the radial direction toward the rear.
The inclination angle of the engaging portion with respect to the longitudinal axis can be made smaller than the inclination angle of the groove surface.

Specifically, the inner peripheral surface of the locker holding hole extends from the first holding surface extending in the radial direction and having a substantially uniform diameter larger than the diameter of the spherical locker, and the first holding surface. Can also have a second holding surface that is located inward in the radial direction and has a diameter smaller than the diameter of the spherical locker.

In a conventional socket, the locker holding hole is a conical hole whose diameter expands outward in the radial direction, but with such a shape, the spherical locker receives a force in the direction of the longitudinal axis. At that time, it tries to displace radially outward along the inner peripheral surface of the conical hole. On the other hand, by making the inner peripheral surface a hole having a uniform diameter extending in the radial direction, such a radial outward force does not act on the spherical locker. Therefore, when the sleeve is displaced rearward and the spherical locker is pushed inward in the radial direction into the locker engaging groove, no extra resistance force is generated, and the force required to displace the sleeve rearward. Can be prevented from becoming too large.

Preferably,
The outer peripheral surface of the socket body and the inner peripheral surface of the sleeve are sealed at positions spaced apart from each other in the direction of the longitudinal axis, and the outer peripheral surface of the socket body and the inner peripheral surface of the sleeve are sealed. The first and second sealing members that form a sealing space between them,
A flow path that communicates with the sealed space and supplies a fluid into the sealed space is further provided.
The sealed space can be made larger in volume as the sleeve is displaced rearward towards the release position.

With such a configuration, the sleeve can be displaced rearward toward the release position by supplying the compressed fluid into the closed space through the flow path. That is, the sleeve can be remotely displaced to the release position to release the connection.

Preferably,
A sleeve cover attached to the socket body so as to cover at least a part of the sleeve is further provided.
A visual display is formed on the outer peripheral surface of the sleeve so that at least a part of the visual display is covered and hidden by the sleeve cover when the sleeve is displaced from the holding position to the release position. Can be.

With such a configuration, it is possible to easily confirm whether the sleeve is in the holding position or the releasing position even from a distant place. This is particularly effective when the sleeve is operated by remote control.

Further, the present invention
With the socket described in any of the above,
A fitting comprising a locker engaging groove with which the spherical locker of the socket engages, and a plug inserted into the insertion space of the socket and detachably connected to the socket. I will provide a.

Hereinafter, embodiments of the joint according to the present invention will be described with reference to the accompanying drawings.

It is a half cross-sectional view which shows the joint which concerns on one Embodiment of this invention. It is a half cross-sectional view of the socket of the joint of FIG. It is a figure which shows the connection state of the joint of FIG. It is an enlarged view around the spherical locker of the joint in the state of FIG. It is a figure which shows the state when the sleeve is displaced halfway rearward toward the release position from the state of FIG. It is an enlarged view around the spherical locker of the joint in the state of FIG. It is a figure which shows the state which the connection between a socket and a plug can be released by further displacing the sleeve from the state of FIG. 5 to the release position. It is a half sectional view of the joint which concerns on another embodiment.

As shown in FIG. 1, the joint 10 according to the present invention includes a socket 12 and a plug 14 removably connected to the socket 12. The plug 14 is formed with an annular locker engaging groove 16 on the outer peripheral surface thereof.

The socket 12 includes a socket body 20 having a tubular wall portion 22, a spherical locker 26 held in a locker holding hole 24 formed so as to penetrate the tubular wall portion 22 in the radial direction thereof, and a socket. A sleeve 30 is provided on the outer peripheral surface 28 of the main body 20 so as to be displaceable in the direction of the longitudinal axis L of the socket main body 20. The tubular wall portion 22 defines an insertion space 34 extending rearward (to the left in the figure) from the front end opening 32, and the plug 14 is inserted into the insertion space 34. The socket 12 is further arranged between the sleeve cover 36 attached to the socket body 20 so as to cover a part of the sleeve 30 and the sleeve cover 36 and the sleeve 30, and the sleeve 30 is moved forward (to the right when viewed in the figure). ) Is provided with a spring 38 urging.

The spherical locker 26 has a locking position in which a part of the spherical locker 26 protrudes inward from the inner peripheral surface 40 of the tubular wall portion 22 as shown in FIG. 1 and a lock as shown in FIG. It is held so as to be displaced in the radial direction from the unlocking position which is located outside the position and does not substantially protrude from the inner peripheral surface 40 of the tubular wall portion 22. As can be clearly seen from FIG. 4, the inner peripheral surface 42 of the locker holding hole 24 extends radially inward from the outer peripheral surface 28 of the socket body 20 and has a substantially uniform diameter larger than the diameter of the spherical locker 26. It is composed of a first holding surface 42a and a second holding surface 42b located near the inner peripheral surface 40 of the socket body 20 and reduced in diameter to a diameter smaller than the diameter of the spherical locker 26. The spherical locker 26 is held in the locker holding hole 24 so as not to come out from the inner peripheral surface 40 side of the socket body 20 by the second holding surface 42b.

As shown in FIG. 1, the sleeve 30 engages with the spherical locker 26 at the lock position from the outside in the radial direction to hold the spherical locker 26 at the lock position, and from the holding position as shown in FIG. The spherical locker 26 can be displaced rearward in the direction of the longitudinal axis L with the release position that allows the spherical locker 26 to be displaced to the unlocked position. Further, the inner peripheral surface 44 of the sleeve 30 is formed with an annular locker receiving groove 46 that receives a part of the spherical locker 26 when it is in the holding position.

The outer peripheral surface 28 of the socket body 20 has a first outer peripheral surface 28a on the front side and a second outer peripheral surface 28b on the rear side having an outer diameter smaller than that of the first outer peripheral surface 28a. Further, the inner peripheral surface 44 of the sleeve 30 has a first inner peripheral surface 44a on the front side facing the first outer peripheral surface 28a of the socket body 20 and an inner diameter smaller than that of the first inner peripheral surface 44a, and the socket body 20 It has a second inner peripheral surface 44b on the rear side facing the second outer peripheral surface 28b of the above. An annular first sealing member 48 that seals between the first outer peripheral surface 28a and the first inner peripheral surface 44a is attached to the first outer peripheral surface 28a of the socket body 20, and the second outer peripheral surface 28b is attached to the second outer peripheral surface 28b. An annular second seal member 50 that seals between the surface 28b and the second inner peripheral surface 44b is attached. The first seal member 48 and the second seal member 50 arranged at intervals in the direction of the longitudinal axis L seal between the outer peripheral surface 28 of the socket body 20 and the inner peripheral surface 44 of the sleeve 30. Space 52 (FIG. 2) is formed. A flow that extends forward from the rear end surface 54 to the outer side in the radial direction and opens to the outer peripheral surface 28 of the socket body 20 at a position between the first seal member 48 and the second seal member 50. A road 56 is formed. By supplying the compressed fluid (typically compressed air) to the sealed space 52 through the flow path 56, the sleeve 30 is directed toward the direction in which the volume of the sealed space 52 increases, that is, toward the release position (FIG. 2). Displace backwards. Further, by discharging the compressed fluid from the sealed space 52, the sleeve 30 is displaced forward by the urging force of the spring 38 and returns to the holding position (FIG. 1). That is, in the socket 12, the sleeve 30 can be displaced between the holding position and the releasing position by remote control by the compressible fluid without the operator directly operating the sleeve 30. By forming the sealing space 52 between the socket body 20 and the sleeve 30 and forming the flow path 56 in the socket body 20 as described above, the overall size of the socket 12 can be substantially changed. It is possible to have a remote control function. When remote control is not required, it is not always necessary to provide the sealed space 52 and the flow path 56.

A knurled visual display portion 60 is formed on the outer peripheral surface 58 of the sleeve 30. The visual display unit 60 is arranged at a position where it is substantially covered and hidden by the sleeve cover 36 when the open position is reached. This makes it possible to visually recognize that the sleeve 30 is in the released position even from a distance. In particular, when the sleeve 30 is operated by remote control, the position of the sleeve 30 can be easily determined even by an operator who is far away. The visual display unit 60 may be any form that can be visually recognized by the operator, and may be in another form such as coloring or drawing a pattern or characters. Further, the visual display unit 60 does not necessarily have to be completely hidden by the sleeve cover 36 when the sleeve 30 is in the released position.

When connecting the plug 14 to the socket 12, first, the compressed fluid is supplied through the flow path 56 or the sleeve 30 is pulled directly rearward to displace the sleeve 30 to the release position shown in FIG. Next, the plug 14 is inserted into the insertion space 34 of the socket 12 while holding the sleeve 30 in the released position. When the sleeve 30 is returned to the holding position with the plug 14 inserted until the locker engaging groove 16 of the plug 14 is located inside the spherical locker 26, the spherical locker 26 is in the lock position as shown in FIG. Therefore, it is in a state of being engaged with the locker engaging groove 16 of the plug 14. At this time, since the spherical locker 26 is engaged with the inner peripheral surface 44 of the sleeve 30 from the outside in the radial direction and held at the locking position, the spherical locker 26 is engaged with the locker engagement groove 16 of the plug 14. Is maintained. In this way, the joint 10 is in a connected state in which the plug 14 is locked to the socket 12.

In the connected state, the plug 14 can be slightly displaced in the direction of the longitudinal axis L. When a force acts between the socket 12 and the plug 14 in the direction away from each other in the direction of the longitudinal axis L, the spherical locker 26 becomes the locker engaging groove 16 of the plug 14 and the locker receiving groove 46 of the sleeve 30. It will be sandwiched between them. More specifically, as shown in FIG. 4, the spherical locker 26 is engaged from the inside rear by the rear groove surface 62 of the locker engagement groove 16 of the plug 14 and pushed outward in the radial direction, and the socket body 20 Partially protrudes from the outer peripheral surface 28 of the. At least a part of this partially protruding portion is received by the locker receiving groove 46 of the sleeve 30, and is in a state of being engaged from the outer front by the front groove surface (engagement portion) 64 thereof. In this state, if the sleeve 30 is attempted to be displaced rearward toward the release position, it interferes with the spherical locker 26 in the direction of the longitudinal axis L, so that the sleeve 30 is prevented from being displaced rearward.

The rear groove surface 62 of the plug 14 and the front groove surface 64 of the sleeve 30 are inclined surfaces whose diameters expand radially outward with respect to the longitudinal axis L, respectively. Further, the front groove surface 64 of the sleeve 30 is formed so that the inclination angle thereof is smaller than the inclination angle of the rear groove surface 62 of the plug 14. As a result, the distance D1 from the engagement point P1 between the front groove surface 64 of the sleeve 30 and the spherical locker 26 to the center C of the spherical locker 26 is the engagement point between the rear groove surface 62 of the plug 14 and the spherical locker 26. The distance from P2 to the center C of the spherical locker 26 is larger than the distance D2. By engaging the sleeve 30 with the spherical locker 26 in such a positional relationship, the spherical locker 26 is directed toward the locker engagement groove 16 of the plug 14 by the force received from the sleeve 30 and the plug 14. Pressed inward in the radial direction. When the sleeve 30 is displaced rearward from the positions of FIGS. 3 and 4, as shown in FIGS. 5 and 6, the spherical locker 26 is formed along the first holding surface 42a of the locker holding hole 24. The plug 14 is displaced inward in the radial direction, and the plug 14 is displaced rearward accordingly. The amount of movement of the plug 14 with respect to the amount of movement of the sleeve 30 at this time is determined by the relationship between the inclination angle of the front groove surface 64 of the sleeve 30 and the inclination angle of the rear groove surface 62 of the plug 14. As described above, in the joint 10, the inclination angle of the front groove surface 64 of the sleeve 30 is smaller than the inclination angle of the rear groove surface 62 of the plug 14, so that the movement amount of the plug 14 is the movement amount of the sleeve 30. Becomes smaller than. Therefore, in a state where the plug 14 receives a force in the direction of being pulled out from the socket 12 (to the right in the figure), the sleeve 30 is pulled from the position of FIG. 4 while pulling the plug 14 against the force. The force required to displace the sleeve 30 to the position is smaller than the force received by the plug 14 in the pulling direction, except for friction and the urging force of the spring 38. That is, in the joint 10, the connected state can be released by applying a force equal to or less than the magnitude of the force acting between the socket 12 and the plug 14 to the sleeve 30. .. However, due to the influence of the urging force and the frictional force of the spring 38, it is naturally necessary to apply a force larger than the force acting between the socket 12 and the plug 14 to the sleeve 30.

When the sleeve 30 is further displaced rearward to reach the release position shown in FIG. 7, the spherical locker 26 is displaced outward in the radial direction so that it can be displaced to the unlocked position. At this time, if a force acting on the plug 14 in the direction away from the socket 12, the plug 14 is pulled out from the socket 12 by the force and the connection is released.

In the joint 10, the front groove surface 64 of the sleeve 30 is outside the spherical locker 26 when a large force is applied between the socket 12 and the plug 14 in the connected state in a direction away from each other. By engaging from the front, the sleeve 30 is prevented from being displaced rearward to the release position. On the other hand, the distance D1 from the engagement point P1 between the front groove surface 64 of the sleeve 30 and the spherical locker 26 to the center C of the spherical locker 26 is the engagement point between the rear groove surface 62 of the plug 14 and the spherical locker 26. Since the distance from P2 to the center C of the spherical locker 26 is larger than the distance D2, the force for pulling the sleeve 30 backward is efficiently converted into the force in the direction of pulling the plug 14 into the insertion space 34. Therefore, when the force between the socket 12 and the plug 14 is lost or sufficiently small, a certain amount of force is applied to the sleeve 30 in the rear direction to pull the plug 14 into the insertion space 34 and make it spherical. The locker 26 can be displaced inward in the radial direction toward the locker engagement groove 16 to release the engagement between the spherical locker 26 and the sleeve 30 in the direction of the longitudinal axis L. This makes it possible to displace the sleeve 30 to the release position and release the connection. That is, in the joint 10, the connection is substantially prevented from being released when a large force is applied between the socket 12 and the plug 14, and when the force becomes small, the plug 14 is opened. It is possible to release the connection by operating the sleeve 30 even with a relatively small force without separately performing an operation of pushing into the insertion space 34. In particular, when the sleeve 30 is displaced by the compressed fluid supplied from the flow path 56, the force between the socket 12 and the plug 14 is increased by keeping the pressure of the supplied compressed fluid constant. It is possible to decide whether or not to allow the disconnection when the pressure is lowered to, and even if the compressed fluid is supplied in a state where a force larger than that is applied, the disconnection can be prevented. For example, when the joint 10 is used as a joint for suspending a suspended load in a crane, a compressed fluid is supplied when the suspended load connected to the plug 14 is lifted and the load is applied to the plug 14. However, the connection can be prevented from being released, and the connection can be released when the suspended load is lowered to the ground and a load due to its own weight is substantially applied to the plug 14. Alternatively, when the joint 10 is used as a pipe joint for connecting pipes through which a fluid flows by using a plug having a flow path, the connection cannot be released while the high-pressure fluid is flowing inside, and the internal fluid cannot be disconnected. When the pressure is released, it is possible to disconnect the connection even if some pressure remains. The magnitude of the force acting between the socket 12 and the plug 14 to allow the disconnection is determined by the engagement point P1 between the front groove surface 64 of the sleeve 30 and the spherical locker 26. The position in the radial direction of the spring 38, the urging force of the spring 38 if it is provided, and the fluid pressure of the sleeve 30 when the sleeve 30 is displaced by the compressed fluid, the shape of the sealing space 52, etc. can be changed by appropriately changing the design. is there.

The joint 110 shown in FIG. 8 differs from the joint 10 only in that it does not have the locker receiving groove 46 provided in the sleeve 30 of the joint 10 shown in FIG. In the joint 110, the sleeve 130 does not engage the spherical locker 126 in the direction of the longitudinal axis L, so that the magnitude of the force between the socket 112 and the plug 114 in the direction away from each other is substantially the same. Regardless, the sleeve 130 can be displaced toward the release position to release the connection. Since other configurations are the same as those of the joint 10 of FIG. 1, the description of these configurations will be omitted.

The present invention is not limited to the above embodiment, and various modifications can be made. For example, the front groove surface 64 of the sleeve 30 as an engaging portion that engages with the spherical locker 26 from the outside front may have another shape. Examples of the engaging portion having another shape include a curved surface that is inclined as a whole, a corner portion of a step, and the like. Further, the plug 14 may be for a pipe joint provided with a flow path penetrating in the direction of the longitudinal axis L.

Joint 10; Socket 12; Plug 14; Locker engagement groove 16; Socket body 20; Cylindrical wall 22; Locker holding hole 24; Spherical locker 26; Outer peripheral surface 28; First outer peripheral surface 28a; Second outer circumference Surface 28b; Sleeve 30; Front end opening 32; Insertion space 34; Sleeve cover 36; Spring 38; Inner peripheral surface 40 (of socket body 20); Inner peripheral surface 42 (of locker holding hole 24); First holding surface 42a Second holding surface 42b; Inner peripheral surface 44 (of sleeve 30); First inner peripheral surface 44a; Second inner peripheral surface 44b; Locker receiving groove 46; First sealing member 48; Second sealing member 50; Sealing Space 52; rear end surface 54; flow path 56; outer peripheral surface 58 (of sleeve 30); visual display 60; rear groove surface 62; front groove surface 64;
Fitting 110; Socket 112; Plug 114; Spherical Locker 126; Sleeve 130;
Longitudinal axis L; engagement points P1, P2; center C; distances D1, D2;

Claims (6)

A socket that detachably connects the corresponding plugs
A socket body having a tubular wall portion that defines an insertion space extending rearward from the front end opening, and a locker holding hole that penetrates the tubular wall portion in the radial direction of the tubular wall portion.
A lock that is held in the locker holding hole, projects inward from the inner peripheral surface of the tubular wall portion, engages with the locker engagement groove of the plug inserted into the insertion space, and locks the plug. A spherical locker that is located outside the locking position and is displaceable between the unlocking position that unlocks the plug.
A holding position that is arranged on the outer peripheral surface of the socket body and engages with the spherical locker from the outside in the radial direction to hold the spherical locker at the lock position, and a holding position that is displaced rearward from the holding position to form the spherical shape. A sleeve that is displaceable in the direction of the longitudinal axis of the socket body between the lock and the release position that allows the lock to be displaced to the unlock position.
The outer peripheral surface of the socket body and the inner peripheral surface of the sleeve are sealed at positions spaced apart from each other in the direction of the longitudinal axis, and the outer peripheral surface of the socket body and the inner peripheral surface of the sleeve are sealed. Between the first and second sealing members, which form a sealing space whose volume is increased as the sleeve is displaced rearward toward the release position.
A flow path that communicates with the sealed space and supplies a fluid into the sealed space,
With
When the spherical locker is in the lock position, the spherical locker is engaged from the inner rear by the groove surface of the locker engagement groove of the plug so as to partially protrude from the outer peripheral surface of the socket body. Has been
The inner peripheral surface of the sleeve engages from the outer front with respect to the spherical locker that partially protrudes from the outer peripheral surface of the socket body when the sleeve is displaced from the holding position toward the releasing position. It has an engaging portion that is adapted to fit, and the engaging portion has a radial distance from the engagement point between the engaging portion and the spherical locker to the center of the spherical locker. It is shaped so as to be larger than the radial distance from the engagement point between the groove surface of the locker engagement groove and the spherical locker to the center of the spherical locker.
By displacing the sleeve from the holding position toward the releasing position while the plug is connected to the socket, the spherical locker is pressed by the engaging portion to displace the plug rearward. Along the engagement portion of the sleeve, it is displaced inward in the radial direction, and the engagement between the engagement portion and the spherical locker in the direction of the longitudinal axis is disengaged, and the sleeve is in the release position. A socket that can be displaced up to. The socket according to claim 1, wherein the engaging portion is an inclined surface whose diameter expands outward in the radial direction toward the rear. The groove surface is an inclined surface whose diameter expands outward in the radial direction toward the rear.
The socket according to claim 2, wherein the inclination angle of the engaging portion with respect to the longitudinal axis is smaller than the inclination angle of the groove surface. The inner peripheral surface of the locker holding hole extends in the radial direction and has a substantially uniform diameter larger than the diameter of the spherical locker, and the first holding surface in the radial direction from the first holding surface. The socket according to any one of claims 1 to 3, having a second holding surface located inside and having a diameter smaller than the diameter of the spherical locker. A sleeve cover attached to the socket body so as to cover at least a part of the sleeve is further provided.
A visual display is formed on the outer peripheral surface of the sleeve so that at least a part of the visual display is covered and hidden by the sleeve cover when the sleeve is displaced from the holding position to the release position. The socket according to any one of claims 1 to 4. The socket according to any one of claims 1 to 5.
A fitting comprising a locker engaging groove with which the spherical locker of the socket engages, and a plug inserted into the insertion space of the socket and detachably connected to the socket. ..

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