JP5474422B2 - Pipe fitting - Google Patents

Description

  The present invention relates to a pipe removal prevention mechanism in a pipe joint.

  For example, a push-one joint having a configuration in which a lock ring is installed in a female member and a flanged sleeve is inserted into the female member is known as a connecting joint for tubes. The lock ring is disposed at the tip of the flanged sleeve in the female member. As the tube is inserted through the sleeve and into the female member, the lock ring pawl is spread by the tube. The claw of the lock ring is urged so as to be reduced in diameter by elastic force. When the tube is pulled out, the claw engages with the outer peripheral surface of the tube, thereby preventing the tube from being pulled out. In a state where the tube is connected, the sleeve is disposed in a state where the flange is separated from the female member. When the flange is picked and the sleeve is pushed toward the female member, the tip of the sleeve is pushed between the claw of the lock ring and the tube, so that the claw is spread and the tube can be extracted from the joint.

  However, in such a configuration, there is a possibility that an object or a hand hits the flange unintentionally and the sleeve is pushed in and the tube is pulled out. In order to prevent such unintentional removal, a spacer is known to be interposed between the flange and the female member. There was a problem that the spacer was lost. In order to solve such a problem, a configuration has been proposed in which the spacer is formed in a semi-ring shape and is pivotally connected to the joint body using a hinge or a small-diameter member having flexibility (patent) Reference 1).

JP 2002-286181 A

  However, in the configuration of Patent Document 1, in a state where the spacer is removed from the joint portion, the position of the spacer is not stable, which may hinder the work. Further, if the spacer is repeatedly attached and detached, the connecting portion may be damaged.

  The present invention is configured integrally with the pipe joint main body, and it is easy to visually recognize the locked state and the released state. In the released state, the spacer position is stable, and a highly durable removal prevention mechanism is provided. It is an object to provide a pipe joint.

  In the pipe joint of the present invention, a lock ring is disposed in the joint body, and the lock ring is engaged with the outer peripheral surface of the pipe inserted into the joint body through the sleeve having the flange portion inserted into the joint body. This is a pipe joint that locks the pipe to prevent it from being pulled out and pushes the sleeve into the joint body to insert the tip of the sleeve between the lock ring and the pipe to release the engagement of the lock ring. A locking member having a spacer that can be interposed between the flange portion and the joint body, a guide member provided on the locking member for sliding the spacer in a direction perpendicular to the axial direction of the joint, and a guide member directly And a lock member holding portion that holds the movable member and prevents its removal.

  The spacer and the guide member are preferably arranged in different planes in the axial direction. The guide member includes, for example, a claw portion, and the claw portion engages with a groove provided in the lock member holding portion, thereby preventing the lock member from falling off. The guide member is preferably composed of a rod-shaped member having a pair of flexibility. Further, the lock member holding portion is provided, for example, at a flange portion of the sleeve.

  Further, the lock member holding portion includes an engagement portion that engages with the guide member, and a support plate portion that is disposed to face the flange main body of the flange portion with the engagement portion interposed therebetween, and the guide member is the support plate portion and the flange main body. It is preferable that the spacer is disposed between the support plate portion and the guide member on the side opposite to the guide member.

  According to the present invention, it is configured integrally with the pipe joint main body, and it is easy to visually recognize the locked state and the released state, and the spacer position is stable even in the released state, and a highly durable removal prevention mechanism is provided. A provided pipe joint can be provided.

It is a perspective view which shows the structure of the pipe joint provided with the removal prevention mechanism which is one Embodiment of this invention, and shows the state at the time of a lock | rock. It is a perspective view which shows the state at the time of the release of the pipe joint of FIG. It is a disassembled perspective view of the sleeve and the lock member from which the flange main body was cut off. It is a side view of a sleeve. It is a rear view of a sleeve. It is a sectional side view along the axial direction of a sleeve. FIG. 5 is a cross-sectional view taken along line AA in FIG. 4. It is a front view of a locking member. It is sectional drawing along line BB of FIG. 8 of a locking member. The state by which the lock member was arrange | positioned in the locked position in the state with which the tube was mounted | worn with the pipe joint is shown as a partial cross section figure. FIG. 11 is a partial cross-sectional view showing a state in which the lock member is slid from the position of FIG. 10 to the release position and the flange is pushed into the joint body.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 and FIG. 2 are perspective views showing the configuration of a pipe joint provided with a removal prevention mechanism according to an embodiment of the present invention. FIG. 1 shows a locked state, and FIG. 2 shows a released state. The outline of the pipe joint of the present embodiment will be described below with reference to FIGS.

  The pipe joint 10 includes a joint body 11 as a female member, a sleeve 12, and a lock member 13. In the present embodiment, the sleeve 12 includes a flange portion 14, and the flange portion 14 includes a flange main body 14 </ b> A and a lock member holding portion 15. The main body (see FIG. 3) of the sleeve 12 is inserted into the joint main body 11, and the collar 16 prevents the sleeve 12 from being removed from the joint main body 11.

  The lock member 13 has a pair of guide members 17, 17 extending substantially in parallel in the same plane perpendicular to the axial direction of the pipe joint 10, and in the same plane perpendicular to the axial direction different from the guide members 17, 17. A pair of spacer members 18A, 18A extending substantially in parallel are provided. The main body 19 of the lock member 13 is formed in, for example, an arc shape, and guide members 17 and 17 and spacer members 18 and 18 are integrally formed at both ends thereof. Also, for example, an arc-shaped spacer member 18B extends between the inner peripheral edge of the lock member main body 19 and between the spacer members 18A and 18A, and a knob 20 is provided on the outer peripheral edge of the lock member main body 19. Is provided. The guide members 17 and 17 are disposed between the flange main body 14A and the lock member holding portion 15, and the spacer members 18A, 18A and 18B are arranged between the lock member holding portion 15 and the joint main body 11 (collar 16) in the locked state. Located between.

  The lock member 13 is slidable perpendicularly to the axial direction of the pipe joint 10 along the longitudinal direction of the guide members 17, 17, and the movement of the lock member 13 is locked with the guide members 17, 17 as will be described later. This is realized by engagement with the portion 15. In the locked state (FIG. 1), the lock member 13 is fitted into the sleeve 12, and the spacer members 18A, 18A, 18B are interposed between the lock member holding portion 15 and the joint body 11 (collar 16). At this time, the outer diameter of the lock member 13 is substantially within the outer diameter of the joint main body 11 and the flange main body 14A, and only the knob portion 20 is protruded and arranged.

  On the other hand, in the released state, the lock member 13 is pulled out from the sleeve 12, and the spacer members 18A, 18A, 18B are pulled out from between the lock member holding portion 15 and the joint body 11 (collar 16). At this time, the locking member 13 is prevented from being completely removed from the sleeve 12 and falling off by the locking mechanism including the guide members 17 and 17 and the lock member holding portion 15 (described later).

  Next, a more detailed configuration of the sleeve 12 and the lock member 13 of the present embodiment will be described with reference to FIGS.

  FIG. 3 is an exploded perspective view of the sleeve 12 and the lock member 13. The sleeve 12 is shown in a state where the flange main body 14A is cut off. 4 is a side view of the sleeve 12 and FIG. 5 is a rear view. 6 is a side sectional view of the sleeve 12 along the axial direction, and FIG. 7 is a sectional view taken along the line AA in FIG. 8 is a front view of the lock member 13, and FIG. 9 is a cross-sectional view taken along line BB in FIG.

  As shown in FIGS. 3 to 6, the sleeve 12 includes a cylindrical sleeve body 21. A lock member holding portion 15 and a flange main body 14A are sequentially provided at the proximal end portion of the sleeve main body 21, and a wedge portion 22 having a wedge-shaped cross section is provided along the peripheral edge at the distal end portion of the sleeve main body 21. Further, the flange main body 14A, the lock member holding portion 15, and the sleeve main body 21 are provided with a bore 23 into which a tube is inserted.

  Moreover, the lock member holding | maintenance part 15 is comprised from the support plate part 24 and the engaging part 25 as FIG. 3, FIG. 7 shows, for example. The support plate portion 24 and the engagement portion 25 are configured symmetrically with respect to a straight line along the sliding direction of the lock member 13 that passes through the axis of the joint 10, and the bore 23 is disposed at the center thereof. The support plate portion 24 holds the guide members 17 and 17 between the flange main body 14A and abuts against the spacer members 18A, 18A and 18B in the locked state to support them in the axial direction. The engaging portion 25 is provided between the support plate portion 24 and the flange main body 14A and engages with the guide members 17 and 17 to lock the lock member 13 in the locked state and the released state. Perform positioning.

  FIG. 7 shows the cross-sectional shape of the engaging portion 25. As shown in FIG. 8, the guide members 17, 17 are rod-shaped members and extend in parallel from both ends of the lock member main body 19. The engaging portion 25 includes parallel slide surfaces 25L and 25L formed at substantially the same interval as the interval between the guide members 17 and 17. That is, the guide members 17 and 17 are slid perpendicularly to the axial direction of the pipe joint 10 by the inner surfaces thereof being in sliding contact with the slide surfaces 25L and 25L.

  In addition, hook ends 17A and 17A projecting inward are provided at the tips of the guide members 17 and 17, respectively, and the engaging portion 25 is engaged with the claws 17A and 17A when locked. The first locking portions 25F and 25F to be joined and the second locking portions 25R and 25R with which the claw portions 17A and 17A engage in the released state are formed at both ends of the slide surfaces 25L and 25L, respectively.

  The 1st latching | locking part 25F, 25F is formed as a V-shaped recessed part with respect to the slide surfaces 25L and 25L, and the vertex of V-shape is connected with the slide surfaces 25L and 25L by an inclined surface. Further, the inclined surfaces of the V-shaped grooves opposite to the slide surfaces 25L and 25L are in contact with the claw portions 17A and 17A when the claw portions 17A and 17A are accommodated in the first locking portions 25F and 25F. The shape and angle are such that unnecessary force does not work. In the case of this embodiment, it extends to the same height as the outer diameter of the flange main body 14A along the hook-like inclination of the claw portions 17A, 17A.

  On the other hand, the second locking portions 25R and 25R are formed as a concave shape with respect to the slide surfaces 25L and 25L, and the vertexes of the square shape are connected to the slide surfaces 25L and 25L through inclined surfaces. In other words, the surfaces on the opposite side of the slide surfaces 25L and 25L of the recesses forming the second locking portions 25R and 25R are formed as surfaces 25P and 25P substantially perpendicular to the slide surface 25L. The vertical surfaces 25P and 25P extend to substantially the same height as the slide surfaces 25L and 25L (the width between the guide members 17 and 17), and are concentric with the center of the bore 23 constituting the upper surface 25T of the engaging portion 25. Connect to a circular arc surface.

  The guide members 17 and 17 have flexibility, and when the lock member 13 is attached to the lock member holding portion 15, the tips of the claw portions 17A and 17A are the upper surface 25T and the vertical surfaces 25P and 25P of the engagement portion 25. The guide members 17 and 17 are bent until the ridge line is overcome, the distance between the claw portions 17A and 17A is expanded, and the claw portions 17A and 17A are fitted to the second locking portions 25R and 25R. Once the claw portions 17A and 17A are engaged with the second locking portions 25R and 25R, the hook-shaped claw portions 17A and 17A are locked to the vertical surfaces 25P and 25P and cannot be removed.

  On the other hand, when the lock member 13 is pushed down toward the sleeve 12, the claw portions 17A and 17A are slid on the inclined surfaces of the second locking portions 25R and 25R and are spread toward the slide surfaces 25L and 25L. After that, the claw portions 17A and 17A are moved along the slide surface 25L, and when the claw portions 17A and 17A reach the inclined surface forming the first locking portions 25F and 25F, they are closed to the original width along the inclined surface by the restoring force And fitted into the V-shaped grooves forming the first locking portions 25F, 25F. At this time, the arcuate upper surface 25 </ b> T of the engaging portion 25 abuts on the arcuate bottom surface of the lock member main body 19.

  With the above configuration, the lock member 13 is slidable in the direction perpendicular to the axial direction of the pipe joint with respect to the sleeve 12, and the claw portions 17A and 17A are fitted into the first locking portions at the lock position corresponding to the locked state. At the position corresponding to the released state, the claw portions 17A and 17A are fitted and locked in the second locking portion. Further, the engagement between the vertical surfaces 25P and 25P and the claw portions 17A and 17A prevents the block member 13 from being detached from the block member holding portion 15. The distance between the support plate portion 24 and the flange main body 14A, that is, the thickness of the engaging portion 25 in the axial direction is slightly larger than the thickness of the guide members 17 and 17.

  When the lock member 13 is moved to the lock position, the spacer members 18A, 18A, and 18B are slidably contacted with the surface of the support plate portion 24 opposite to the guide members 17 and 17, and the support plate portion 24 is It is sandwiched between the spacer members 18A, 18A, 18B and the guide members 17, 17. The longitudinal lengths of the guide members 17 and 17 are longer than the spacer members 18A and 18A, and the interval between the spacer members 18A and 18A is wider than the interval between the guide members 17 and 17. When the lock member 13 is at the release position and the flange 12 is pushed into the joint body 11 in the axial direction as will be described later, the end of the spacer portions 18A, 18A hits the outer peripheral surface of the joint body 11. Set to not.

  Next, with reference to FIG. 10, FIG. 11, the effect | action of the pipe joint 10 of this embodiment is demonstrated. FIG. 10 shows a state in which the lock member 13 is disposed at the lock position in a state where the tube is attached to the pipe joint 10, and FIG. 11 shows that the lock member 13 is slid from the position of FIG. The state which pushed 12 into the coupling main body 11 is shown. In both figures, the upper part of the axis is drawn as a side view, and the lower part of the axis is a sectional view.

  In FIG. 10, since the spacer members 18A, 18A, and 18B are interposed between the support plate portion 24 of the flange portion 14 and the joint body 11 (collar 16), the sleeve portion 12 is joined by operating the flange portion 14. It cannot be pushed into the body 11. At this time, the claw of the lock ring 27 is engaged with the periphery of the tube 26, and the tube 26 cannot be pulled out from the joint 10. As shown in FIG. 10, the lock ring 27 is held at a predetermined position in the joint body 11 by the collar 16 fitted in the opening of the joint body 11. Further, since the wedge portion 22 at the tip of the sleeve 12 is engaged with the collar 16, the sleeve 12 is not pulled out of the joint body 11 beyond the lock position shown in FIG. 10.

  FIG. 11 shows a state where the lock member 13 is slid to the release position and the flange 12 is pushed into the joint body 11. That is, the flange 12 can be pushed into the joint body 11 in the axial direction by the thickness of the spacer members 18A, 18A, 18B. When the flange 12 is pushed in, the wedge portion 22 at the tip thereof pushes up the claw of the lock ring 27 and the engagement between the tube 26 and the lock ring 27 is removed. As a result, the tube 26 can be removed from the joint 10.

  As described above, according to the present embodiment, the spacer can be slid in a direction perpendicular to the axial direction, and can be prevented from falling off. Further, in the locked state, the lock member fits within the outer diameter of the joint body, and in the released state, the lock member protrudes from the joint, so that it can be visually distinguished from the locked state or the released state. . Further, in the released state, the position of the spacer does not become unstable, and it is not necessary to use a structure such as a hinge, which is advantageous in terms of durability.

  In this embodiment, the engaging portion is provided on the flange portion and the guide member is held on the sleeve side. However, a similar configuration can be provided on the joint body side. Moreover, in this embodiment, although the guide member was made into one pair, one guide member may be sufficient and two or more may be sufficient as it.

  In the present embodiment, the push-one joint used for connecting the tubes has been described as an example. However, the lock mechanism of the present embodiment can be used for other types of pipe joints.

DESCRIPTION OF SYMBOLS 10 Pipe joint 11 Joint main body 12 Sleeve 13 Lock member 14 Flange part 14A Flange main body 15 Lock member holding part 16 Collar 17 Guide member 18A, 18B Spacer member 19 Lock member main body 20 Knob part 21 Sleeve main body 22 Wedge part 23 Bore 24 Support plate Part 25 Engagement part 25L Slide surface 25F First engagement part 25P Vertical surface 25R Second engagement part 26 Tube 27 Lock ring

Claims (4)

A lock ring is disposed in the joint body, and the lock ring is engaged with an outer peripheral surface of a pipe inserted into the joint body through a sleeve having a flange portion inserted into the joint body. A tube that locks and prevents disengagement and releases the engagement of the lock ring by inserting the end of the sleeve between the lock ring and the tube by pushing the sleeve into the joint body A joint,
A lock member provided with a spacer that can be interposed between the flange portion and the joint body;
A guide member provided on the lock member for sliding the spacer in a direction perpendicular to the axial direction of the joint;
A lock member holding portion that holds the guide member so that it can move linearly and prevents its removal ;
The spacer and the guide member are arranged in different planes in the axial direction;
The guide member includes a claw portion, and the claw portion engages with a groove provided in the lock member holding portion, thereby preventing the lock member from falling off . The pipe joint according to claim 1 , wherein the guide member includes a rod-shaped member having a pair of flexibility. The pipe joint according to claim 2 , wherein the lock member holding portion is provided on a flange portion of the sleeve. The locking member holding portion, the guide member that engage the engaging portion and the support plate portion whether Rannahli which is arranged facing the flange body of the flange to sandwich the engaging portion, the guide member The pipe joint according to claim 3 , wherein the pipe joint is disposed between the support plate portion and the flange body, and the spacer is disposed on the opposite side of the support plate portion from the guide member.

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