JP7029302B2 - Pipe fittings - Google Patents

Description

The present invention relates to a pipe fitting that is detachably connected to a pipe member.

In a pipe joint that is detachably connected to a pipe member by engaging a spherical locker with a locker locking groove formed on the outer peripheral surface of the corresponding pipe member, the locker is attached to the outside thereof. It is known that a spring member is urged inward in the radial direction to maintain the engaged state between the locker and the locker locking groove.

For example, in the pipe joints shown in Patent Documents 1 and 2, a spherical locker is held in a locker holding hole provided in a tubular main body of the pipe joint so as to be displaceable in the radial direction. Is urged inward in the radial direction by a C-shaped leaf spring. The tube member is formed with a tip inclined surface inclined so as to reduce the diameter toward the tip, and an annular locker locking groove formed behind the tip inclined surface, and both side surfaces of the locker locking groove are formed. It is tilted to open outward in the radial direction. When such a pipe member is inserted into the pipe joint, the locker is pressed radially outward by the inclined surface at the tip of the pipe member, so that the locker is displaced radially outward. When the locker locking groove is further inserted and becomes a position where the locker locking groove coincides with the locker in the radial direction, the locker is displaced inward in the radial direction by the urging force of the leaf spring and engages with the locker locking groove. As a result, the pipe joint is in a connected state connected to the pipe member. Further, when the pipe member is pulled out from the pipe joint with a certain force or more from the connected state, the locker is pressed radially outward by the inclined side surface on the tip side of the locker locking groove, so that the locker has a diameter. Displace outward in the direction. As a result, the engagement between the locker and the locker locking groove is released, and the connected state is released.

Jikkenhei 3-12086 Gazette International Publication No. 2017/099084

In the above-mentioned conventional pipe joint, the spherical locker is held so as to be displaced in the radial direction, and the locker is pressed outward in the radial direction by the inclined surface provided on the corresponding pipe member at the time of connection and disconnection. It is designed to do. Therefore, it is necessary that the pipe member connected to such a pipe joint is provided with an inclined surface at the tip portion thereof, and at least the side surface on the tip end side of the locker locking groove is also provided with an inclined surface. Become. However, the pipe member to be connected may not always have such a configuration, and in that case, there is a possibility that proper connection and disconnection may not be possible with the above-mentioned conventional pipe joint.

Therefore, an object of the present invention is to provide a pipe joint capable of connecting pipe members having a wider range of shapes in view of the above-mentioned problems of the prior art.

That is, the present invention
A pipe joint that is detachably connected to a pipe member having a locker locking groove on the outer peripheral surface.
A pipe joint body having a tubular shape defining a fluid passage extending rearward from the front end opening and having a locker holding hole penetrating in the radial direction.
A locker attached to the pipe joint body, which is a holding portion located radially outside the pipe joint body, a locking protrusion extending radially inward from the holding portion through the locker holding hole, and a locking portion. It has a locking protrusion and an urging portion that urges the holding portion radially inward, and the locking protrusion protrudes radially inward from the inner peripheral surface of the pipe joint body and is inserted into the fluid passage. The locking position that engages with the locking groove of the tube member and the solution that is displaced radially outward from the locking position to release the engagement between the locking protrusion and the locking groove. A locker that can be displaced in the radial direction from the lock position,
Equipped with
A sliding inclined surface inclined radially outward toward the front or the rear is formed on at least one of the outer peripheral surface of the pipe joint body facing each other and the inner surface of the locker.
When the pipe member is displaced forward or backward with respect to the pipe joint body in the fluid passage and the locking protrusion of the locker at the locking position is pressed forward or backward, the locking is performed. The child is displaced forward or backward together with the pipe member and is displaced outward in the radial direction by slidingly engaging with the pipe joint main body on the sliding inclined surface so as to be in the unlocked position. Provide pipe fittings.

In the pipe joint, a sliding inclined surface inclined radially outward toward the front or the rear is provided on at least one of the outer peripheral surface of the pipe joint body and the inner surface of the locker, and the locker is provided. When pressed forward or backward by the pipe member, the locker is displaced in the same direction and slides with the pipe joint body on the sliding inclined surface to be displaced outward in the radial direction toward the unlocking position. ing. That is, the displacement of the locker in the radial direction at the time of connecting or disconnecting the pipe member is caused by the sliding engagement with the pipe joint main body on the sliding inclined surface. Therefore, when the sliding inclined surface is inclined forward, the displacement of the locker to the outside in the radial direction at the time of release is caused by the action of the sliding inclined surface, so that the locker holding hole of the pipe member It is no longer necessary for the side surface to be an inclined surface, and when the sliding inclined surface is inclined toward the rear, the displacement of the locker in the radial direction at the time of connection is caused by the action of the sliding inclined surface. It is not necessary to provide an inclined surface at the tip of the pipe member. Therefore, the pipe joint can be detachably connected to a pipe member having a wider range of shapes as compared with the conventional pipe joint.

In particular,
The sliding inclined surface is inclined outward in the radial direction toward the front, and the sliding inclined surface is inclined outward in the radial direction.
When the pipe member is displaced forward with respect to the pipe joint body in a state where the pipe member is connected, the locker is in the lock position, and the lock protrusion is received by the locker locking groove. In addition, the locker is displaced forward together with the pipe member and is displaced outward in the radial direction by slidingly engaging with the pipe joint main body on the sliding inclined surface so as to be in the unlocked position. Can be done.

Moreover,
The rear side wall surface of the locker holding hole is a surface substantially perpendicular to the longitudinal axis of the pipe joint body.
When the tube member is inserted rearward into the fluid passage, the locker at the lock position is pressed radially outward by the tube member while being pressed against the rear side wall surface by the tube member. By being pressed, the locker is displaced radially outward to the unlocking position along the rear side wall surface, and the locker locking groove is radially aligned with the locking protrusion. When the position is reached, the locker can be displaced to the lock position along the rear side wall surface by the urging force of the urging portion.

With such a configuration, when the locker locking groove of the pipe member is in a position that is radially aligned with the lock protrusion of the locker, the locker is moved to the lock position by the urging force of the urging portion. It is possible to displace at once and collide with the outer peripheral surface of the pipe joint body or the pipe member. As a result, a collision sound or vibration is generated, and the operator can more easily recognize from the collision sound or vibration that the connection is completed and the locker is in the locked position.

Preferably, the sliding inclined surface is provided on the inner surface of the locker at a position on the front side of the locking protrusion and a front inward sliding inclined surface provided at a position on the rear side of the locking protrusion. It can have a rearward inward sliding inclined surface.

With such a configuration, the locker is supported by the pipe joint body before and after the lock protrusion, and it is possible to prevent the locker from tilting forward or backward and stabilize the posture of the locker. Become. As a result, the displacement of the locker can be performed more smoothly.

In this case,
The sliding inclined surface is provided on the outer peripheral surface of the pipe joint body at a position on the front side of the locker holding hole and at a position on the rear side of the locker holding hole. Further has a rearward outward sliding inclined surface,
When the locker at the lock position is displaced forward or backward, the forward inward sliding inclined surface of the locker and the forward outward sliding inclined surface of the pipe joint body are slidably engaged with each other. By slidingly engaging the rear inward sliding inclined surface of the locker and the rear outward sliding inclined surface of the pipe joint body, the locker is displaced outward in the radial direction so as to be in the locked position. be able to.

With such a configuration, the locker and the pipe joint main body can be slidably engaged with each other, so that the sliding of the locker with respect to the pipe joint main body becomes more stable.

In particular,
The locker holding hole is an elongated hole extending in the circumferential direction of the pipe joint body.
The holding portion of the locker is an arcuate portion extending in a circumferential direction along the outer peripheral surface of the pipe joint body, and the locking protrusion is substantially perpendicular to the longitudinal axis of the pipe joint body. It can be a plate-shaped portion extending radially inward from the inner side surface of the holding portion along a flat surface.

Moreover,
The locker has a locker main body having the lock protrusion and the holding portion, and a spring member having the urging portion and separated from the locker main body, and the spring member has the spring member. A central portion extending in the circumferential direction of the pipe joint main body along the outer surface of the locker main body and extending from both ends of the central portion in the circumferential direction so as to approach each other in the radial direction. It has an engaging end portion that engages with the outer peripheral surface of the pipe joint body, and the locker body can be held by the spring member with respect to the pipe joint body.

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

It is external perspective view of the pipe fitting which concerns on one Embodiment of this invention. It is an exploded perspective view of the pipe joint of FIG. It is a side sectional view of the pipe joint of FIG. 1 in the unconnected state. It is a side sectional view which shows the 1st state in the process of connecting the pipe joint of FIG. It is a side sectional view which shows the 2nd state in the process of connecting the pipe joint of FIG. It is a side sectional view in the connected state of the pipe joint of FIG. It is a side sectional view which shows the 1st state in the process of disconnecting a pipe joint of FIG. It is a side sectional view which shows the 2nd state in the process of disconnecting the pipe joint of FIG.

As shown in FIGS. 1 to 3, the pipe joint 10 according to the embodiment of the present invention includes a tubular pipe joint main body 12 and two lockers 14 attached to the pipe joint main body 12. Each locker 14 includes a lockr main body 16 formed as a separate body, and a spring member (urging portion) 18 that holds the locker main body 16 with respect to the pipe joint main body 12 and urges them inward in the radial direction. Consists of.

As shown in FIG. 3, the pipe member 1 detachably connected to the pipe joint 10 has an annular locker locking groove 3 on its outer peripheral surface 2. The side surface 4 of the locker locking groove 3 is a surface perpendicular to the longitudinal axis L of the pipe member 1. Further, the pipe member 1 has a tip inclined surface 5 inclined so as to reduce the diameter toward the tip 6 of the pipe member 1.

The pipe joint main body 12 defines a fluid passage 22 extending rearward (to the left when viewed in FIG. 3) from the front end opening 20 and has a locker holding hole 24 penetrating in the radial direction. As shown in FIG. 2, the locker holding hole 24 is an elongated hole extending in the circumferential direction of the pipe joint main body 12. Further, the front side wall surface 24a and the rear side wall surface 24b of the locker holding hole 24 are surfaces substantially perpendicular to the longitudinal axis L of the pipe joint main body 12.

The locker main body 16 of the locker 14 has an arc-shaped holding portion 26 that is curved in the circumferential direction along the outer peripheral surface 12a of the pipe joint body 12 and extends in a plane perpendicular to the longitudinal axis L of the pipe joint body 12. It has a locking protrusion 28 extending radially inward from the inner side surface 26a of the holding portion 26 along the plate shape. In a state where the locker 14 is attached to the pipe joint main body 12, the lock protrusion 28 extends radially inward through the locker holding hole 24. The spring member 18 has a central portion 30 extending in the circumferential direction along the outer surface 16a of the locker main body 16 and an engagement extending from both ends of the central portion 30 in the circumferential direction so as to approach each other in the radial direction. It has an abutment portion 32. A recess 16b extending in the circumferential direction is formed on the outer surface 16a of the locker main body 16, and the central portion 30 of the spring member 18 is arranged in the recess 16b. As a result, the spring member 18 is prevented from coming off the locker main body 16 in the direction of the longitudinal axis L. A flat spring locking surface 34 is formed on the outer peripheral surface 12a of the pipe joint body 12, and the engaging end portions 32 of the spring member 18 engage with the spring locking surface 34 to sandwich the pipe joint body 12. It has become like. Since the spring locking surface 34 and the engaging end portion 32 are parallel to the longitudinal axis L, the spring member 18 can be displaced in the direction of the longitudinal axis L along the spring locking surface 34. The locking element 14 has a locking position (FIGS. 3 and 6) in which the locking protrusion 28 projects radially inward from the inner peripheral surface 12b of the pipe joint body 12 and an unlocking position (FIG. 3 and 6) displaced outward in the radial direction from the locking position. It can be displaced in the radial direction from FIG. 5 and FIG. 8), and is urged inward in the radial direction toward the locking position by the spring member 18.

A front inward sliding inclined surface 36 is provided at a position on the inner side surface 26a of the holding portion 26 of the locker 14 on the inner side surface 26a of the lock protrusion 14 on the front side of the lock protrusion 28 (the position on the right side in the figure), and is more than the lock protrusion 28. A rear inward sliding inclined surface 38 is provided at the rear side position (the left side position when viewed in the figure). The forward inward sliding inclined surface 36 and the rear inward sliding inclined surface 38 are inclined outward in the radial direction toward the front at the same angle with each other. Further, a front outward sliding inclined surface 40 is provided at a position on the outer peripheral surface 12a of the pipe joint body 12 on the front side of the locker holding hole 24, and a rear outward sliding is provided at a position behind the locker holding hole 24. A dynamic inclined surface 42 is provided. The forward outward sliding inclined surface 40 and the rear inward sliding inclined surface 38 are radially outward at the same angle as the anterior inward sliding inclined surface 36 and the rear inward sliding inclined surface 38 of the locker 14. It is tilted. The front inward sliding inclined surface 36 and the front outward sliding inclined surface 40 are at positions facing each other, and the rear inward sliding inclined surface 38 and the rear outward sliding inclined surface 42 are at positions facing each other.

When the pipe member 1 is inserted into the fluid passage 22 of the pipe joint body 12 from the non-connected state of FIG. 3, the tip inclined surface 5 of the pipe member 1 is inserted into the locking protrusion 28 of the locker body 16 at the locked position. Engageed and the locker body 16 is pressed backwards. Then, the lockr main body 16 is displaced rearward together with the tube member 1, and the lock protrusion 28 is pressed against the rear side wall surface 24b of the locker holding hole 24, so that further rearward displacement is prevented (FIG. 4). ). When the tube member 1 is further inserted, the locker main body 16 is pressed radially outward by the tip inclined surface 5 of the tube member 1, and the spring member 18 is attached along the rear side wall surface 24b of the locker holding hole 24. Displaces radially outward against forces. In this way, the locker 14 is displaced outward in the radial direction to reach the unlocking position (FIG. 5). Then, when the locker locking groove 3 is in a position where the locker locking groove 3 is radially aligned with the lock protrusion 28, the locker main body 16 is suddenly displaced inward in the radial direction along the rear side wall surface 24b by the urging force of the spring member 18. do. As a result, the locking protrusion 28 is received in the locking groove 3 and the locking 14 is in the locking position (FIG. 6). The locker 14 displaced at once from the unlocked position to the locked position collides with the outer peripheral surface 12a of the pipe joint main body 12 on the inner side surface 26a. This causes collision noise and vibration. Such collision noise and vibration are particularly large when the side surface 4 of the locker locking groove 3 of the tube member 1 is a vertical surface that is not inclined. The operator can easily recognize that the locking element 14 is in the locked position and the connection is completed by the collision sound or vibration. In the conventional pipe joint, since the locker is spherical and the side surface of the locker locking groove is greatly inclined, the displacement of the locker and the spring member in the radial direction at the time of connection is relatively gentle. Therefore, collision noise and vibration like the pipe joint 10 are unlikely to occur. In the connected state, the seal member 44 attached to the inner peripheral surface 12b of the pipe joint body 12 seals and engages between the pipe joint body 12 and the pipe member 1.

When the pipe member 1 is displaced forward with respect to the pipe joint body 12 from the connected state of FIG. 6, the locker 14 engaged with the locker locking groove 3 is pressed forward by the pipe member 1 and the pipe member is pressed forward. Displace forward with 1. When the locker 14 is displaced forward, the forward inward sliding inclined surface 36 of the locker 14 and the forward outward sliding inclined surface 40 of the pipe joint main body 12 are engaged with each other, and the backward inward sliding inclined surface 38 of the locker 14 is engaged. And the rearward outward sliding inclined surface 42 of the pipe joint body 12 are engaged with each other. When the pipe member 1 is pulled further forward with a force of a certain degree or more, the front inward sliding inclined surface 36 and the front outward sliding inclined surface 40, and the rear inward sliding inclined surface 38 and the rear outward sliding inclined surface 42 slide, respectively. By dynamic engagement, the locker 14 is displaced forward together with the pipe member 1 and is also displaced radially outward along the inclination of each sliding inclined surface 36-42 against the urging force of the spring member 18. (Fig. 7). When the lock protrusion 28 comes out of the lock lock groove 3 and the lock 14 is in the unlocked position, the engagement between the lock protrusion 28 and the lock lock groove 3 is released (FIG. 8). By further displacing the pipe member 1 forward, the pipe member 1 is completely separated from the pipe joint 10.

In the pipe joint 10, when the pipe member 1 is displaced forward with respect to the pipe joint body 12 from the connected state, the locker 14 slides with the pipe joint body 12 on each sliding inclined surface 36-42. By fitting, it is displaced outward in the radial direction to reach the unlocking position. Therefore, the side surface 4 of the locker locking groove 3 of the pipe member 1 does not need to be inclined, and the pipe member 1 can have a simple structure. Further, when the pipe member 1 is connected, the locker 14 is suddenly displaced from the unlocked position to the locked position, so that a collision sound or vibration is generated, so that the operator can easily confirm that the connection is completed. Can be recognized.

Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments. For example, the sliding inclined surface may be provided only on one of the lock and the pipe joint body, or one of the front position and the rear position with respect to the lock protrusion or the lock holding hole. It may be provided only on the side of. Further, as a surface in which the sliding inclined surface is inclined outward in the radial direction toward the rear, the locker is slidably engaged with the pipe joint member on the sliding inclined surface when the pipe member is inserted, and the locker is formed. It may be configured so that it is displaced outward in the radial direction while being displaced rearward to reach the unlocking position. In this case, it is not necessary to provide an inclined surface at the tip of the pipe member. Further, even if both the sliding inclined surface inclined outward in the radial direction toward the front as in the above embodiment and the sliding inclined surface inclined outward in the radial direction toward the rear as described above are provided. good. In this case, it is not necessary that the side surface of the locker locking groove of the pipe member is inclined and that the tip is inclined. The spring member of the locker may be a C-shaped or annular member arranged around the plurality of locker bodies so as to urge the plurality of locker bodies radially inward at the same time. Further, the locker may be formed by forming the locker main body and the spring member as an integral member.

1 Pipe member 2 Outer peripheral surface 3 Locker locking groove 4 Side surface 5 Tip inclined surface 6 Tip 10 Pipe fitting 12 Pipe fitting body 12a Outer peripheral surface 12b Inner peripheral surface 14 Locker 16 Locker body 16a Outer side surface 16b Recess 18 Spring member ( Bouncer)
20 Front end opening 22 Fluid passage 24 Locker holding hole 24a Front side wall surface 24b Rear side wall surface 26 Holding part 26a Inner side surface 28 Locking protrusion 30 Central part 32 Engaging end part 34 Spring locking surface 36 Forward inward sliding inclined surface 38 Rear inward sliding inclined surface 40 Forward outward sliding inclined surface 42 Rear outward sliding inclined surface 44 Seal member L Longitudinal axis

Claims (7)

A pipe joint that is detachably connected to a pipe member having a locker locking groove on the outer peripheral surface.
A pipe joint body having a tubular shape defining a fluid passage extending rearward from the front end opening and having a locker holding hole penetrating in the radial direction.
A locker attached to the pipe joint body, which is a holding portion located radially outside the pipe joint body, a locking protrusion extending radially inward from the holding portion through the locker holding hole, and a locking portion. It has a locking protrusion and an urging portion that urges the holding portion radially inward, and the locking protrusion protrudes radially inward from the inner peripheral surface of the pipe joint body and is inserted into the fluid passage. The locking position that engages with the locking groove of the tube member and the solution that is displaced radially outward from the locking position to release the engagement between the locking protrusion and the locking groove. A locker that can be displaced in the radial direction from the lock position,
Equipped with
A sliding inclined surface inclined radially outward toward the front or the rear is formed on at least one of the outer peripheral surface of the pipe joint body facing each other and the inner surface of the locker.
When the pipe member is displaced forward or backward with respect to the pipe joint body in the fluid passage and the locking protrusion of the locker at the locking position is pressed forward or backward, the locking is performed. The child is displaced forward or backward together with the pipe member and is displaced outward in the radial direction by slidingly engaging with the pipe joint main body on the sliding inclined surface so as to be in the unlocked position. Pipe fittings. The sliding inclined surface is inclined outward in the radial direction toward the front, and the sliding inclined surface is inclined outward in the radial direction.
When the pipe member is displaced forward with respect to the pipe joint body in a state where the pipe member is connected, the locker is in the lock position, and the lock protrusion is received by the locker locking groove. In addition, the locker is displaced forward together with the pipe member and is displaced outward in the radial direction by slidingly engaging with the pipe joint main body on the sliding inclined surface so as to be in the unlocked position. , The pipe joint according to claim 1. The rear side wall surface of the locker holding hole is a surface substantially perpendicular to the longitudinal axis of the pipe joint body.
When the tube member is inserted rearward into the fluid passage, the locker at the lock position is pressed radially outward by the tube member while being pressed against the rear side wall surface by the tube member. By being pressed, the locker is displaced radially outward to the unlocking position along the rear side wall surface, and the locker locking groove is radially aligned with the locking protrusion. The pipe joint according to claim 2, wherein the locker is displaced to the locked position along the rear side wall surface by the urging force of the urging portion when the locker is in the position. The sliding inclined surface is a front inward sliding inclined surface provided at a position on the inner surface of the locker on the front side of the locking protrusion and a rearward inward provided at a position on the rear side of the locking protrusion. The pipe joint according to any one of claims 1 to 3, which has a sliding inclined surface. The sliding inclined surface is provided on the outer peripheral surface of the pipe joint body at a position on the front side of the locker holding hole and at a position on the rear side of the locker holding hole. Further has a rearward outward sliding inclined surface,
When the locker at the lock position is displaced forward or backward, the forward inward sliding inclined surface of the locker and the forward outward sliding inclined surface of the pipe joint body are slidably engaged with each other. By slidingly engaging the rear inward sliding inclined surface of the locker and the rear outward sliding inclined surface of the pipe joint body, the locker is displaced outward in the radial direction so as to be in the locked position. The pipe fitting according to claim 4. The locker holding hole is an elongated hole extending in the circumferential direction of the pipe joint body.
The holding portion of the locker is an arcuate portion extending in the circumferential direction along the outer peripheral surface of the pipe joint body, and the locking protrusion is substantially perpendicular to the longitudinal axis of the pipe joint body. The pipe joint according to any one of claims 1 to 5, which is a plate-shaped portion extending radially inward from the inner surface of the holding portion along a flat surface. The locker has a locker main body having the lock protrusion and the holding portion, and a spring member having the urging portion and separated from the locker main body, and the spring member has the spring member. A central portion extending in the circumferential direction of the pipe joint main body along the outer surface of the locker main body and extending from both ends of the central portion in the circumferential direction so as to approach each other in the radial direction. The first to sixth aspects of claim 1 to 6, which have an engaging end portion that engages with the outer peripheral surface of the pipe joint body, and the locker body is held by the spring member with respect to the pipe joint body. The pipe fitting according to any one item.

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