JPH09280439A - Pipe fittings - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To easily and quickly perform piping work, and to confirm the insertion amount when the pipe is mounted on the pipe joint without causing deformation of the pipe during the fastening work of the pipe and the pipe joint. Thus, a relatively inexpensive pipe joint is provided. SOLUTION: A main body 10, a pressed tool 30 that is pressed by an end surface of a pipe 5 and moves in the direction of the main body 10, and is fixed to the main body 10 when moved to a predetermined position with respect to the main body 10, When the pressed tool 30 moves in the direction of the main body 10 and the pressed tool 30 moves to a predetermined position with respect to the main body 10, the outer periphery of the tube 5 is locked to press the pressed tool 30 of the tube 5. Tube fixing means 50 for fixing the relative position of the tube fixing portion to the tubular portion, the engaging means 16 for engaging the tube fixing means 50 to operate the tube fixing means 50, and the fitting portion between the pressed tool 30 and the main body 10. And the pipe joint 1 having the sealing means 70 for sealing between the tubular portion of the pressed tool 30 and the pipe 5 is provided.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a pipe joint.

[0002]

2. Description of the Related Art Resin pipes, cross-linked polyethylene pipes and the like are used for construction of buildings and the like, and metal joints are often used for these joints. As the pipe joint as described above, for example, a chuck ring for fastening the outer circumference of the end of the pipe joint body to the pipe is inserted into the end of the pipe joint body, and the outer circumference of the chuck ring is tapered to the inner circumference. A joint is known in which the diameter of the chuck ring is reduced by the taper surface formed on the inner periphery of the nut by tightening the nut formed with the above, and the pipe surface and the pipe joint body are pressure-connected.

[0003]

However, in the above-described pipe joint, it is troublesome to connect the pipes because the nuts need to be tightened, and when a plurality of pipes are arranged in parallel, Since adjacent pipes interfere with each other during piping work, there is a problem that workability of nut tightening is poor.

In addition, there is a problem that the chuck ring may rotate with the rotation of the nut when the nut is tightened, which may deform or damage the tube.

Further, there is a problem that it is difficult to confirm the insertion amount when the pipe is attached to the pipe joint, and it is difficult to confirm whether or not the pipe and the pipe joint are securely fastened.

Further, since metal is used as the material of the pipe joint, there is a problem that the cost of the pipe joint becomes relatively high.

The present invention has been made in view of the above-mentioned conventional problems, and the piping work can be performed easily and quickly, and the pipe is not deformed when the pipe and the pipe joint are fastened.
It is easy to check the insertion amount when the pipe is attached to the pipe joint,
An object is to provide a relatively inexpensive pipe joint.

[0008]

The pipe joint according to the present invention comprises:
A main body (10) made of a tubular member and a tubular inner core portion (42) fitted into the pipe (5) so as to be axially movable at the inner circumference of the end of the main body (10). The formed tubular member is moved by the end surface of the pipe (5) toward the main body (10) and moved to a predetermined position with respect to the main body (10). A pressed member (30) fixed to 10),
When the pressed tool (30) moves in the direction of the main body (10) and the pressed tool (30) moves to a predetermined position with respect to the main body (10), the pipe ( 5) A tube fixing means (50) for fixing the relative position of the pipe (5) to the inner core part (42) of the pressed tool (30) by locking the outer periphery of the pressed tool (30).
At least one engaging means (16) that engages with the pipe fixing means (50) and moves the pipe fixing means (50) as the body moves in the direction of the body (10); When the (30) moves to a predetermined position with respect to the main body (10), the pressed member (30) and the main body (10)
Sealing means (7) for sealing between the pipe (5) and the fitting portion of the pipe and the tubular portion of the pressed tool (30).
0) and.

In the pipe joint according to the present invention, when the pipe is inserted into the inner core portion, one end surface of the pipe presses the pressed member and moves it toward the main body. With the movement of the pressed tool, the pipe fixing means and the engaging means engage with each other, and the pipe fixing means operates. Thus, when the pressed tool moves to a predetermined position with respect to the main body, the relative position between the inner core portion of the pressed member and the tube is fixed by the tube fixing means, and the pressed tool is also fixed to the main body. To be done. On the other hand, when the pressed tool comes to a predetermined position with respect to the main body, the space between the pressed tool and the main body is sealed by the sealing means. As a result, the pipe is fixed to the pipe joint, and at the same time, sealing is performed, and the mounting of the pipe to the pipe joint is completed.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a pipe joint according to the present invention will be described below in detail with reference to the drawings.

<Embodiment 1> FIG. 1 is a half sectional front view showing an embodiment of a pipe joint according to the present invention. In FIG. 1, the pipe joint 1 includes a main body 10, a pressed member 30, a chuck ring 50, a cover 60, and an O-ring 70.

2A and 2B are explanatory views showing the structure of the main body 10. FIG. 2A is a left side view and FIG. 2B is a half sectional front view. As shown in FIG. 2, the main body 10 is a cylindrical member having a flange portion 11, a male screw portion 20, and a hexagonal nut portion 21 formed on the outer circumference. A tapered surface 16 as an engaging means is provided on the left side surface of the flange portion 11 in FIG.
Are provided on the inner peripheral side, and a plurality of (six) strip-shaped strip-shaped portions 15 extending in the axial direction are concentrically formed at equal intervals in the circumferential direction. Further, on the outer side of the strip-shaped portion 15, a cylindrical outer cylinder portion 12 is formed concentrically with the strip-shaped portion 15. A male screw portion 13 for fastening with a cover 60 described later is formed on the outer peripheral side of the outer tubular portion 12. The inner circumference of the outer tube portion 12 is
It is a fitting surface 14 that fits with the outer periphery of the pressed tool 30 to be described later. On the other hand, in the main body 10, the cylinder portion 1 axially fitted with the piston portion 48 of the pressed tool 30 described later.
7, O-ring holding portion 46 of the pressed tool 30 which will be described later
A fitting portion 18 and a conduction hole 19 which are fitted with each other are formed.

Next, FIG. 3 is a left side view (FIG. 3 (a)) showing a structure of the pressed tool 30 and a half sectional front view (FIG. 3 (b)).
3 is a right side view (FIG. 3 (c)). As shown in FIG. 3, the pressed tool 30 is a member that has a generally double tubular portion that has a through hole 45 in the axial direction, and the inner tubular portion is on the outer periphery of a pipe 5 to be described later. An inner core portion 42 inserted into the end portion, a piston portion 48 that fits with the cylinder portion 17 of the main body 10 described above, and an O-ring holding portion 46 that also fits with the fitting portion 18 of the main body 10 are formed. There is. The standing wall formed by the step between the piston portion 48 and the O-ring holding portion 46 is the O-ring seat surface 4
It is 7.

The inner core portion 42 and the piston portion 48
A flange portion 44 is formed between and. An outer tubular portion is continuously provided on the side surface of the flange portion 44. In the outer tubular portion, a plurality (12) of slits 31 extending in the axial direction parallel to the inner core portion 42 are formed at equal intervals in the circumferential direction. The slits 31 alternately form a plurality of ring support piece portions 32 and a plurality of locking arms 40 that support a chuck ring ring 50 described later. The inner circumferences of the tip ends of the ring support piece 32 and the locking arm 40 have an insertion opening 3 into which the tube 5 is inserted.
It is 6.

A stopper 3 for engaging the inner circumference of a cover 60, which will be described later, with the outer circumference of each of the ring support pieces 32 to prevent the pressed tool 30 from coming off after the pipe joint 1 is assembled.
3 are formed. The inner periphery of the insertion opening 36 in the axial direction is stepped, and a ring holding portion 37 that holds a chuck ring 50 described later is formed by this stepped formation. The side surface of the ring holding portion 37 is a ring pressing surface portion 38 that abuts the chuck ring 50. In addition, the inner peripheral surface of the ring support piece portion 32 has the above-mentioned main body 10
The outer peripheral surface of each of the strip-shaped portions 15 is a fitting surface 34 to be fitted. A taper portion 41 is provided on the outer periphery of the locking arm 40.
A locking protrusion 41 having a and a standing wall 41b is formed, and engages with an inner peripheral portion of a cover 60 described later to play a role of fixing a positional relationship with the main body 10. The surface of the flange portion 44 on which the ring support piece portion 32 and the locking arm 40 are formed and the ring support piece portion 32.
On the inner peripheral surface of the locking arm 40, the tube 5 is inserted into the insertion port 3
When it is inserted from 6, the end surface of the tube 5 serves as an annular pressed portion 49 that is pressed. Also, the flange portion 44
The strip-shaped portion 1 of the main body 10 is provided on the outer periphery of the pressed portion 49 of
Guide holes 39 into which 5 are fitted and inserted are formed corresponding to the strip-shaped portions 15.

Next, FIG. 4 is a side view (FIG. 4A) showing a structure of the chuck ring 50 and a front view of a half section (FIG. 4).
(B)). As shown in FIG. 4, the chuck ring 5
Reference numeral 0 is an annular member having a cutout portion 53 in the circumferential direction.
The outer periphery has a held surface 52 held by the ring holding portion 37 of the pressed tool 30 described above, and a taper as an engaging means formed at the one end of the strip-shaped portion 15 of the main body 10 described above. A tapered surface 51 that engages the surface 16 is formed. A pipe is inserted in the inner circumference, and when the diameter is reduced, a crease surface 54 is formed that bites the outer circumference of the pipe. The crease surface 54 is formed with irregularities that repeat in the axial direction.

Next, FIG. 5 is a half sectional front view (FIG. 5A) and side view (FIG. 5B) showing the structure of the cover 60.
It is. As shown in FIG. 5, the cover 60 is a cylindrical member, and is formed on the outer periphery of the outer tubular portion 12 of the main body 10 at the opening of the inner periphery 61 on the right side of FIG. 5A. A female screw portion 65 that is fastened to the male screw portion 13 is formed. A guide wall 62 having a diameter smaller than that of the inner circumference 61 is formed in the opening on the side of the end face 60a.
The inner peripheral surface of the guide wall 62 serves as a guide hole 63 for guiding the outer periphery of the pressed tool 30. The inner side surface of the guide wall 62 is the locking arm 40 in the pressed tool 30.
Taper portion 41a of the locking projection 41 formed on the outer periphery of the
And engaging or locking with the stoppers 33 formed on the outer periphery of the standing wall portion 41b and the ring supporting piece portion 32,
It is a locking surface 64 that restricts the movement of the pressed tool 30 in the axial direction.

As described above, the main body 10, the pressed member 30,
The pipe joint 1 including the chuck ring 50, the cover 60 and the O-ring 70 is assembled as follows. The chuck ring 50 is held by the ring holding portion 37 of the pressed tool 30, and the O ring 70 is held by the O ring holding portion 4.
6 and the O-ring 70 is in contact with the O-ring seat surface 47, the pressed tool 30 is fitted to the main body 10. At this time, the strip-shaped portion 15 of the main body is inserted into the guide hole 39 of the pressed tool 30 in such a state that the strip-shaped portion 15 is fitted. As a result, the pressed tool 30 does not rotate with respect to the main body 10. Further, the piston portion 48 of the pressed tool 30 and the cylinder portion 17 of the main body 10 are fitted together. In such a state, the pressed tool 30
The cover 60 is mounted so that the outer periphery of the cover 60 is inserted into the guide hole 63 of the cover 60, and the cover 60 is appropriately rotated to form the female screw portion 65 formed on the inner periphery of the cover 60 and the outer cylinder of the main body 10. When the cover 60 is fixed to the main body 10 by fastening the male screw portion 13 formed on the outer periphery of the portion 12, the assembly is completed.

Here, FIG. 1 shows a state in which the pipe is not attached to the pipe joint 1. In this state, the pressed tool 30 is axially guided by the guide hole 63 of the cover 60 and the strip-shaped portion 15 of the main body 10 inserted into its own guide hole 39, and is in a state of being movable in the axial direction. ing. When the pressed tool 30 is moved away from the main body 10, the stopper 33 of the pressed tool 30 causes the guide wall 6 of the cover 60 to move.
The contacting surface 64, which is the inner surface of the second member 2, comes into contact with the locking surface 64, so that the pressed tool 30 is prevented from coming off. On the other hand, when the pressed tool 30 is moved toward the main body 10 (more specifically, when it is moved toward the male screw portion 20 of the main body 10), FIG.
As shown in FIG. 6, among the locking projections 41 having the tapered portion 41 a and the standing wall portion 41 b formed on the outer periphery of the locking arm 40 of the pressed tool 30, the tapered portion 41 a is the cover 6.
It contacts the inner peripheral corner portion 62a of the guide wall 62 of 0. As a result, the movement of the pressed tool 30 toward the main body 10 is restricted. In addition, in order to move the pressed tool 30 in the direction of the main body 10 in a state where the pipe is not attached, the tapered surface 1 of the main body 10 is used.
6 and the taper surface 51 of the chuck ring 50 are engaged with each other to reduce the diameter of the chuck ring 50, so that a pressing force in the axial direction according to the diameter reduction of the chuck ring 50 is required.

However, when the tapered portion 41a abuts on the inner peripheral corner portion 62a of the guide wall 62 and thereafter the pushed tool 30 is pushed toward the main body 10 with a further strong pressing force, the locking arm 40 bends. It is possible to further move the pressed tool 30 toward the main body 10.

FIG. 1 shows a state in which no pipe is attached to the pipe joint 1, but next, FIGS. 7 and 8 show the pipe 5 in the pipe joint 1.
Shows a state in which is attached. From the state of the pipe joint 1 shown in FIG. 1, the pipe 5 whose inner diameter matches the outer diameter of the inner core portion 42 of the pressed tool 30 and whose outer diameter matches the inner diameter of the insertion opening 36 of the pressed tool 30 is inserted. . Inner core portion 4 of the pressed tool 30
When the tube 5 is inserted between the outer circumference of the tube 2 and the insertion opening 36 of the pressed tool 30, the end surface 5 a of the tube 5 contacts the pressed portion 49 of the pressed tool 30. In this state, the relative positional relationship between the inner core portion 42 of the pressed tool 30 and the tube 5 is determined.
Furthermore, if the pipe 5 is continuously pushed toward the main body 10,
The pressed tool 30 also moves toward the main body 10. With the movement of the pressed tool 30, the chuck ring 50 held by the ring holding portion 37 of the pressed tool 30 moves toward the main body 10. By this movement of the chuck ring 50, the tapered surface 51 formed on the outer peripheral end of the chuck ring 50 contacts the tapered surface 16 formed on the strip-shaped portion 15 of the main body 10.

The taper surface 5 of the chuck ring 50
1 and the taper surface 16 of the strip-shaped portion 15 are in contact with each other,
When the chuck ring 50 is further moved toward the main body 10, the chuck ring 50 is gradually reduced in diameter due to the engagement between the tapered surface 51 and the tapered surface 16. Due to the reduced diameter of the chuck ring 50, the outer circumference of the tube 5 is tightened by the chuck ring 50 and the inner core portion 42 of the pressed tool 30 is tightened.
Will be fastened to the outer circumference. At this time, since the streak surface 54 is formed on the inner circumference of the chuck ring 50,
This crease surface 54 bites on the outer peripheral portion of the tube 5, and the regulation force of the axial movement of the tube 5 is further strengthened. Further, by fastening the pipe 5 to the inner core portion 42, the pipe 5 and the inner core portion 42 are simultaneously sealed.

Further, in the above-described state, the piston portion 48 of the pressed tool 30 and the cylinder portion 17 of the main body 10 are fitted, but when the pressed tool 30 is further moved by the pressing of the pipe 5, the pressed tool 30 is pressed. The O-ring holding portion 46 of the tool 30 and the fitting portion 18 of the main body 10 are fitted to each other. Further, the O-ring 70 held by the O-ring holding portion 46 by the movement of the pressed tool 30 in the direction of the main body 10 becomes the cylinder portion 1 of the main body 10.
7 and the O-ring abutment surface 17a formed by the stepped portion between the fitting portion 18 and the fitting portion 18. The O-ring 70 is sandwiched between the O-ring seat surface 47 and the O-ring contact surface 17a, and
It is pressed by the ring seat surface 47. As a result, the O-ring 70 expands in diameter and comes into close contact with the cylinder portion 17 of the main body 10, and the sealing between the main body 10 and the pressed tool 30 is performed. As a result, the sealing between the pipe 5 and the inner core portion 18 and the sealing between the main body 10 and the pressed tool 30 are completed, and the sealing between the pipe 5 and the pipe joint 1 is completed.

On the other hand, when the pipe 5 is inserted in the direction of the main body 10, the taper portion 41a formed on the outer periphery of the locking arm 40 of the pressed tool 30 described above has an inner peripheral corner portion 62a of the guide wall 62 of the cover 60. Abut. When the pressed tool 30 further moves toward the main body 10 in this state, the locking arm 40 bends, the locking projection 41 enters the inside of the guide wall 62, and as shown in FIG. 41 standing wall 4
1b is locked by the locking surface 64 of the cover 60. At this time, in the pressed tool 30, the ring pressing surface portion 38 abuts on the chuck ring 50 that is engaged with the tube 5, and the standing wall portion 41 b of the locking projection 41 is fixed to the locking surface 6 of the cover 60.
Since it is locked by 4, it is impossible to move in the axial direction. This completes the mounting of the pipe 5 on the pipe joint 1. As can be seen from FIGS. 7 and 8, when the mounting is completed, the axially one end surfaces 30a and 60a of the pressed tool 30 and the cover 60 are located on the same plane.

In the pipe joint 1 having the pipe 5 attached thereto as described above, the pipe 5 is detached from the pipe joint 1 by rotating the cover 60 and detaching it from the main body 10.

As described above, according to this embodiment, the pipe 5
When the mounting of the pipe 5 to the pipe joint 1 is completed, the one end surfaces 30a and 60a of the pressed tool 30 and the cover 60 in the axial direction are located on the same plane, so that the mounting of the pipe 5 to the pipe joint 1 is confirmed to be complete. It is possible to check the insertion amount of the tube 5 as well.

Further, if the tube 5 is inserted in the axial direction without being rotated, the mounting of the tube 5 on the pipe joint 1 is completed, so that the chuck ring 60 does not rotate, and the conventional chuck ring co-rotation occurs. Can be prevented.

Further, the chuck ring 50 is the pressed member 30.
Along with the mounting of the tube 5, the relative positional relationship between the chuck ring 50 and the pressed tool 30 does not change. In addition to this, since the inner core portion 42 is formed integrally with the pressed tool 30, the pressed tool 30 by the pressing of the tube 5 is performed.
Does not change the relative positional relationship between the inner core portion 42 and the tube 5. For this reason, even if the diameter of the chuck ring 50 is reduced, the inner peripheral surface 5 of the chuck ring 50 is
Almost no axial frictional force is generated between the tube 4 and the pipe 5,
Further, almost no frictional force is generated in the axial direction between the inner core portion 42 and the pipe 5. Therefore, the pressing force required to mount the pipe 5 on the pipe joint 1 is relatively small, and therefore the mounting is easy, and the outer peripheral surface and the inner peripheral surface of the pipe 5 are not damaged.

The pipe joint 1 according to the present invention can be manufactured from a resin material, a metal material or the like, and when manufactured from a resin material, the product cost can be reduced.
Further, the tapered surface 16 may be formed as a separate component from the main body 10.

<Embodiment 2> Next, FIG. 9 is a half sectional front view showing another embodiment of the pipe joint according to the present invention. FIG.
1 is different from the pipe joint 1 shown in FIG. 1 in that in the pressed member 30 of the pipe joint 1 shown in FIG. 9, as shown in FIG. Part 3
That is, the taper surface 48 as an engaging means for reducing the diameter of the chuck ring 50 is formed between the taper surface 48 and the contact surface 7. In addition, FIG.
As shown in FIG. 3, the chuck ring 50 has a taper surface 51 formed at one end of the outer periphery in order to engage with the taper surface 48 formed on the pressed member 30. A tapered surface 55 is formed on the portion.

That is, in the pipe joint 1 of FIG. 9, the chuck ring 50 is axially moved by the two engaging means of the tapered surface 48 and the tapered surface 16 formed on the strip portion 15 of the main body 10. Reduce the diameter from both sides.

When the pipe 5 is inserted into the inner core portion 42 of the pressed tool 30 and pressed in the state shown in FIG. 9, the pressed tool 30 moves toward the main body and the ring holding portion of the pressed tool 30. The chuck ring 50 held by 37 also moves in the direction of the main body 10 together with the pressed tool 30. The tapered surface 51 of the chuck ring 50 is the tapered surface 16 of the main body 10.
At the same time, the taper surface 55 of the chuck ring 50 abuts the taper surface 48 of the pressed tool 30. From this state, when the pressed tool 30 is further pressed by the tube 5 toward the main body 10, the tapered surface 51 of the chuck ring 50, the tapered surface 16 of the main body 10, the tapered surface 48 of the pressed tool 30, and the taper of the chuck ring 50. The surface 55 is engaged with the chuck ring 50 to reduce its diameter.

As a result, the relative position between the inner core portion 42 of the pressed tool 30 and the tube 5 is fixed and the sealing is performed. Further, similarly to the above, the O-ring 70 seals between the main body 10 and the pressed tool 30. In addition, in the same manner as described for the pipe joint 1 in FIG.
One axial end surface 30 of the pressed tool 30 and the cover 60
The mounting is completed when a and 60a are located on the same plane.

Thus, the tapered surface 48 of the pressed tool 30
The diameter of the chuck ring 50 is reduced in the axial direction by adopting a structure in which the diameter of the chuck ring 50 is reduced at both ends of the outer periphery of the chuck ring 50 by two engaging means of the taper surface 16 formed on the strip-shaped portion 15 of the main body 10. Will be done evenly in. Therefore, the fastening force between the tube 5 and the inner core portion 42 of the pressed tool 30 increases, and the sealing becomes more reliable. In addition, also in the pipe joint of this example, the tapered surface 5
The members 1 and 16 can be formed by using members other than the pressed member 30 or the main body 10.

Next, FIG. 12 is a front view of a half section showing still another embodiment of the pipe joint according to the present invention. The pipe joint 2 shown in FIG. 12 has a main body 100, a pressed tool 130, a lock ring 150 cover 60, O-rings 170 and 171, a ring support tool 190, and a taper ring 200. Hereinafter, the main body 100, the pressed tool 130, the ring support tool 19
The structures of 0, the taper ring 200, and the lock ring 150 are shown in FIGS. 13 to 17, respectively.

FIG. 13 is a side view (FIG. 13A) showing a structure of the main body 100 and a front view of a half section (FIG. 13B).
It is. As shown in FIG. 13, the main body 100 is a cylindrical member having a male screw portion 120 and a hexagonal nut portion 121 formed on the outer circumference. An outer cylinder portion 112 is formed on the end surface 123 side of the main body 100 shown in FIG. 13B, and a male screw portion 113 for fastening with the cover 60 shown in FIG. 5 is formed on the outer periphery thereof. There is. The inner circumference of the outer tube portion 112 has a fitting surface 122 that fits with the outer circumference of a ring support 190 described later.
It has become. Further, in the axial direction of the inner side of the main body 100, a cylinder portion 117 that fits with a piston portion 138 of the pressed tool 130, which will be described later, and an O-ring holding section 136 of the pressed tool 130.
A fitting portion 118 and a conduction hole 119 for fitting with are formed.

FIG. 14 is a left side view (FIG. 14 (a)) showing a structure of the pressed tool 130, and a front view of a half section (FIG. 14).
(B)) It is a right view (FIG.14 (c)). FIG.
As shown in FIG.
The inner tubular portion is an inner core portion 132 to be inserted into an end portion of the pipe 5 described later, which is a member having an overall double tubular portion having 31. A flange portion 133 is formed at one end of the inner core portion 132. An outer cylindrical portion is connected to the flange portion 133. A tip surface of the outer tubular portion is a contact surface 149 that comes into contact with a holding rib 204 of the taper ring 200 described later, and a plurality of locking arms 140 are formed on the outer circumference of the tip portion at equal intervals in the circumferential direction. Has been done. A tapered portion 141 a and a tip end surface 141 are provided on the outer periphery of the tip of the locking arm 140.
A locking protrusion 141 having b is formed, and engages with an inner peripheral portion of the cover 60 described later to play a role of fixing the positional relationship with the main body.

The distal end of the connecting arm 191 of the ring support 190, which will be described later, is fitted to the outer periphery of the tubular portion formed on the side surface of the flange 133 so as to be sandwiched between the locking arms 140. A fitting recess 139 is formed.
On the bottom surface of the fitting recess 139, the connecting arm 19 described above is provided.
A locking projection 142 is formed which fits in a locking hole 192 formed at the tip of the No. 1. Similarly, on the outer circumference of the tubular portion formed on the side surface of the flange portion 133, the piston portion 1 that fits with the cylinder portion 117 of the main body 100 described above.
38 and an O-ring holding portion 136 that fits with the fitting portion 118 of the main body 100 described above. The standing wall formed by the step between the piston portion 138 and the O-ring holding portion 136 is an O-ring seat surface 137.
It has become.

On the other hand, on the inner circumference of the cylindrical portion formed on the side surface of the flange portion 133, an O-ring holding portion 144 holding a fitting surface 143 that fits with the outer circumference of the taper ring 200, which will be described later, and an O-ring 171. And, the outer circumference of the pipe is a pipe insertion portion 135 to be inserted. The wall surface of the flange portion 133 on the pipe insertion portion 135 side is a pressed portion 134 that is pressed by the end surface of the pipe. The standing wall portion formed by the step between the O-ring holding portion 144 and the tube insertion portion 135 is an O-ring seat surface 145.

FIG. 15 is a left side view (FIG. 15 (a)) showing a structure of the ring support 190, and a half sectional front view (FIG. 15).
FIG. 15B) and a right side view (FIG. 15C).

As shown in FIG. 15, the ring support 190
Is a cylindrical member as a whole, and slit-shaped fitting portions 197 extending in parallel to the axial direction for fitting with the locking arm 140 of the pressed tool 130 are equally spaced in the circumferential direction in the cylindrical portion. Is formed in plural. Between the fitting portions 197, a connecting arm 19 for connecting with the above-described pressed tool 130.
1 is formed. The outer peripheral surface of the cylindrical portion is a guide surface 198 guided by the guide hole 63 of the cover 60.

A locking hole 192 into which the locking projection 142 of the pressed tool 130 is fitted is formed at the tip of the connecting arm 191. On the other hand, the inner circumference of the opening of the end surface of the ring support tool 190 is an insertion opening 196 into which the tube 5 is inserted, and the inner circumference of the insertion opening 196 in the axial direction is stepped. A ring holding portion 195 for holding a lock ring 150 described later is formed by.

FIG. 16 is a left side view (FIG. 16 (a)) showing the structure of the taper ring 200, and a half sectional front view (FIG. 16).
(B)) It is a right view (FIG.16 (c)). FIG.
As shown in FIG. 6, the taper ring 200 is a cylindrical member, and the inner peripheral surface thereof has a tapered surface 203 as an engaging means for engaging with a lock ring 150 described later and a pipe into which the outer periphery of the pipe is inserted. It is the insertion surface 202. The outer peripheral surface is a fitting surface 2 that fits with the fitting surface 143 of the pressed tool 130.
01. Further, a plurality of holding ribs 204 are formed at one end of the outer circumference at equal intervals in the circumferential direction. The holding ribs 204 fix the taper ring 200 to the main body 100 by being sandwiched between the end surface 123 of the main body 100 and the locking surface 64 of the cover 60. The holding ribs 204 are the same as the holding ribs 204.
Between the locking arms 140 and through the fitting portion 197 of the ring support tool 190 to project to the outside of the ring support tool 190.

FIG. 17 is a front view (FIG. 17A) and a right side view (FIG. 17) showing the structure of the lock ring 150.
(B)). As shown in FIG. 17, the lock ring 1
Reference numeral 50 is an annular member having cutouts 153 formed at equal intervals in the circumferential direction. A lock arm 151 and a connecting portion 154 are formed by the cutout portion 153, and a claw 152 bent in the axial direction is formed at the tip end portion of the lock arm 151. When the lock ring 150 engages with the tapered surface 203 of the tapered ring 200, the diameter of the connecting portion 154 does not change, but the lock arm 151 does not change.
The diameter of the portion is reduced so that the above-mentioned claw 152 is engaged with the outer circumference of the tube.

As described above, the main body 100 and the pressed member 13
0, lock ring 150, cover 60, O-ring 17
0, 171, ring support 190 and taper ring 2
Assembling of the pipe joint 2 constituted by No. 00 is performed as follows.

The O-ring holding portion 136 of the pressed tool 130
By inserting the O-rings 170 and 171 into the 144, respectively, the O-rings 170 and 171 are respectively inserted into the O-ring seat surface 13
It is in a state of being in contact with 7, 145. Then, the pressed tool 1
The mating surface 143 of 30 and the mating surface 20 of the taper ring 200
Fit 1 and. Next, with the lock ring 150 being held by the ring holding portion 195 of the ring support tool 190, the ring support tool 190 is attached to the pressed tool 130. The ring support tool 190 and the pressed tool 130 have locking projections 1 for locking the pressed tool 130 in locking holes 192 formed at the tip of the connecting arm 191 of the ring support tool 190 described above.
42 is fixed by fitting.

FIG. 18 shows the pressed tool 130 and the O-ring 17.
0, 171, lock ring 150, ring support 190
And assembly 2 with the taper ring 200 assembled
10 is shown. In FIG. 18, as described above, the holding ribs 204 of the taper ring 200 are in a state of protruding from the outer circumference of the ring support 190.

Next, the assembly 210 in the state shown in FIG.
Is inserted into the main body 100 so that the piston portion 138 of the pressed tool 130 fits into the cylinder portion 117 of the main body 100. In this state, the guide surface 1 of the ring support 190
The cover 60 is mounted so that the 98 is inserted into the guide hole 63 of the cover 60. Rotate the cover 60 appropriately,
Female screw portion 65 formed on the inner periphery of cover 60 and main body 10
The cover 60 is fixed to the main body 100 by fastening the male screw portion 113 formed on the outer periphery of the outer cylinder portion 112 of 0, and the assembly is completed. At this time, the both end surfaces 204a, 204b of the holding rib 204 of the taper ring 120 that protruded in the state of the assembly 210 shown in FIG.
As shown in FIG. 5, the locking surface 64 of the cover 60 and the end surface 123 of the main body 100 press the surface of the cover 60 to fix it to the main body 100. Accordingly, the rotation of the taper ring 120, the pressed tool 130, and the ring support tool 190 with respect to the main body 100 is restricted.

Here, FIG. 12 shows a state in which the pipe is not attached to the pipe joint 2. In this state, the assembly 210 in the state shown in FIG. 18 is movable in the axial direction except for the taper ring 120. Assembly 21 above
When 0 is moved in a direction away from the main body 100, as shown in FIG. 19, the contact surface 149 at the tip of the cylindrical portion on the outer side of the pressed tool 130 is moved to the holding rib 20 of the taper ring 200.
4 by contacting the end surface 204b of the assembly 210
Is being pulled out.

On the other hand, when the assembly 210 is moved toward the main body 100, as shown in FIG.
Of the locking protrusion 140 formed on the outer periphery of the front end of the locking arm 140 of the cover 60 is the guide wall 6 of the cover 60.
It abuts on the inner peripheral corner portion 62a. This allows assembly 2
The movement of 10 toward the main body 100 is restricted. In addition, in order to move the assembly 210 toward the main body 100 without the pipe attached, the taper surface 2 of the taper ring 200 is used.
03 and the lock arm 151 of the lock ring 150 are engaged with each other to reduce the diameter of the portion of the lock arm 151. Therefore, a pressing force in the axial direction according to the diameter reduction of the portion of the lock arm 151 is required.

After the tapered portion 141a of the locking arm 140 abuts the inner peripheral corner portion 62a of the guide wall 62, the locking arm 140 bends when the assembly 210 is pushed toward the main body 100 with a stronger pressing force. The assembly 210 can be moved further toward the main body 100.

FIG. 12 shows a state in which no pipe is attached to the pipe joint 2, but next, the pipe joint 2 is shown in FIGS. 21 and 22.
The state where the pipe 5 is attached is shown in FIG. From the state of the pipe joint 2 shown in FIG. 12, the inner core portion 13 of the pressed tool 130 has an inner diameter of 13
The tube 5 that fits the outer diameter of 2 and fits the inner diameter of the insertion opening 196 of the ring support tool 190 and the inner diameter of the tube insertion portion 135 of the pressed tool 130 is inserted. When the tube 5 is inserted between the outer periphery of the inner core portion 132 of the pressed tool 130 and the insertion port 196 of the ring support tool 190, the end surface 5a of the tube 5 is inserted.
Contacts the pressed portion 134 of the pressed tool 130. In this state, the relative positional relationship between the assembly 210 and the pipe 5 is determined.

Further, when the pipe 5 is continuously pushed toward the main body 10, the assembly 210 including the pressed member 130 moves toward the main body 100 except the taper ring 120. As the assembly 210 moves, the ring support 19
Lock ring 15 held by the ring holding portion 195 of 0
0 moves toward the main body 100. The movement of the lock ring 150 causes the outer peripheral surface of the lock arm 151 formed on the lock ring 150 to move toward the taper ring 20.
It abuts on the tapered surface 203 formed to be zero.

When the lock arm 151 formed on the lock ring 150 and the taper surface 203 formed on the taper ring 200 are in contact with each other, the lock ring 150 is further moved.
Is moved toward the main body 100, the lock arm 15
1 and the tapered surface 203 are engaged with each other, the lock ring 15
The diameter of the lock arm 151 portion of 0 gradually decreases. Due to the reduction in diameter of the lock arm 151 portion of the lock ring 150, the claw 152 at the tip of the lock arm 151 moves into the tube 5.
The tube 5 bites into and is tightened on the outer circumference of the
It is fastened to the outer periphery of the inner core portion 132 of 30. As a result, the inner core portion 13 of the pressed tool 130 is
The relative positional relationship between 2 and the tube 5 is fixed. At this time, the claws 152 of the lock ring 150 bite into the outer periphery of the tube 5, so that the force of restricting the movement of the tube 5 in the axial direction (the direction in which it comes off from the inner core portion 132 of the pressed tool 130) becomes strong. The lock ring 150 fastens the tube 5 and the inner core portion 132 of the pressed tool 130,
The tube 5 and the inner core portion 132 are not sealed.

Further, in the above state, the piston portion 138 of the pressed tool 130 and the cylinder portion 117 of the main body 100 are fitted, but the pressed tool 130 is moved by the pressing of the pipe 5, and the pressed tool 130 is moved. O-ring holding portion 13 of the pressing tool 130
6 and the fitting portion 118 of the main body 100 are fitted to each other. further,
When the pressed tool 130 moves toward the main body 100, the O
O-ring 170 held by ring holding portion 136
Is an O-ring abutment surface 117a formed by a stepped portion between the cylinder portion 117 and the fitting portion 118 of the main body 100.
Abut. The O-ring 170 is sandwiched between the O-ring seat surface 137 and the O-ring contact surface 117 a, and is pressed by the O-ring seat surface 137. This allows the O-ring 17
0 expands the diameter and comes into close contact with the fitting portion 118 of the main body 100, and the sealing between the main body 100 and the pressed tool 130 is performed.

Similarly, the tube insertion portion 135 of the pressed tool 130.
When the pipe 5 is inserted into the pipe 5, the inner diameter of the O-ring 171 held by the O-ring holding portion 144 is slightly smaller than the inner diameter of the pipe insertion portion 135.
The ring 171 is in close contact. Thereby, the pressed tool 130
The inner core portion 132 and the tube 5 are sealed.

As a result, the sealing between the tube 5 and the inner core portion 132 of the pressed tool 130 and the main body 100 are performed.
The sealing between the pipe 5 and the pipe joint 1 is completed by the sealing between the and the pressed tool 130.

On the other hand, as the tube 5 is inserted toward the main body 100, the locking arm 140 of the pressed tool 130 bends inside the guide wall 62 of the cover 60, and the locking projection 1
41 passes through, the locking projection 141 enters the inside of the guide wall 62, and as shown in FIG. 22, the locking projection 1
The tip end surface 141b of 41 is locked by the locking surface 64 of the cover 60, and cannot be moved in the axial direction. This completes the mounting of the pipe 5 on the pipe joint 2. As can be seen from FIGS. 21 and 22, when the mounting is completed, one end surface 19 of the ring support 190 and the cover 60 in the axial direction is formed.
0a and 60a are located on the same plane.

Further, in the pipe joint 2 having the pipe 5 attached thereto as described above, the pipe 5 is removed from the pipe joint 2 by rotating the cover 60 and separating it from the main body 100.

According to the pipe joint 2 of the present embodiment described above, the same operational effect as that of the pipe joint 1 of the embodiment shown in FIG. 1 can be obtained.

[0061]

As described above, according to the pipe joint of the present invention, when the pressed tool moves to a predetermined position with respect to the main body when the pipe is inserted into the pipe joint, the pressed tool and the main body. Since the fitting of the pipe to the pipe joint is completed in a state where the positional relationship between and is fixed, it is easy to confirm the completion of the fitting, and the insertion amount can also be confirmed easily.

Further, since the pipe can be attached to the pipe joint by inserting the pipe in the axial direction of the pipe joint and pressing it, the pipe fixing means does not rotate, and the outer circumference of the pipe is damaged or deformed. Can be prevented.

Further, in the pipe joint of the present invention, since the inner core portion is provided integrally with the pressed tool, even if the pipe fixing means is operated, the inner core portion of the pressed tool and the pipe are separated from each other. Almost no frictional force is generated in the axial direction, and the pressing force required for mounting the pipe on the pipe joint is relatively small. Therefore, the mounting is easy, and damage to the outer peripheral surface and the inner peripheral surface of the pipe can be prevented.

[Brief description of drawings]

FIG. 1 is a front view in half section showing an embodiment of a pipe joint according to the present invention.

2 is a side view (FIG. 2 (a)) and a half-section front view (FIG. 2 (b)) showing the structure of the main body of the pipe joint shown in FIG.
It is.

FIG. 3 is a left side view (FIG. 3 (a)) showing a structure of a pressed tool in the pipe joint shown in FIG.
(B)) It is a right view (FIG.3 (c)).

4A and 4B are a side view (FIG. 4A) and a half sectional front view (FIG. 4B) showing a structure of a chuck ring in the pipe joint shown in FIG.

5 is a front view (FIG. 5A) and a side view (FIG. 5) of a half section showing a structure of a cover in the pipe joint shown in FIG.
(B)).

FIG. 6 is a front view in half section showing the relationship between the cover and the locking projections in the pipe joint shown in FIG.

7 is a front view in half section showing a state in which a pipe is attached to the pipe joint shown in FIG.

FIG. 8 is a front view in half section showing a state in which a pipe is attached to the pipe joint shown in FIG.

FIG. 9 is a front view in half section showing another embodiment of the pipe joint according to the present invention.

10 is a front view in half section showing the structure of a pressed tool in the pipe joint shown in FIG. 9. FIG.

FIG. 11 is a front view in half section showing the structure of a chuck ring in the pipe joint shown in FIG.

FIG. 12 is a front view in half section showing another embodiment of the pipe joint according to the present invention.

13 is a side view (FIG. 13 (a)) showing a structure of a main body of the pipe joint shown in FIG. 12 and a front view of a half section (FIG. 13).
(B)).

14 is a left side view (FIG. 14 (a)) showing a structure of a pressed tool in the pipe joint shown in FIG. 12, a front view of a half section (FIG. 1).
4 (b)) and a right side view (FIG. 14 (c)).

FIG. 15 is a left side view (FIG. 15 (a)), a half-section front view (FIG. 15 (b)) and a right side view (FIG. 15 (c)) showing the structure of the ring support in the pipe joint shown in FIG. ).

16 is a left side view (FIG. 16 (a)), a half-section front view (FIG. 16 (b)) and a right side view (FIG. 16 (c)) showing the structure of the taper ring in the pipe joint shown in FIG. Is.

17 is a front view (FIG. 17 (a)) and a right side view (FIG. 17 (b)) showing the structure of the lock ring in the pipe joint shown in FIG.

FIG. 18 is a front view in half section showing the assembled state of the pressed member, the O-ring, the taper ring, the lock ring and the ring support in the pipe joint shown in FIG.

FIG. 19 is a front view in half section showing the relationship between the main body, the taper ring and the ring support in the pipe joint shown in FIG.

FIG. 20 is a front view of a half cross section showing the relationship between the cover and the locking projection in the pipe joint shown in FIG.

21 is a front view, in half cross section, showing a state in which a pipe is mounted on the pipe joint shown in FIG. 12. FIG.

22 is a front view in half section showing a state in which a pipe is attached to the pipe joint shown in FIG.

[Explanation of symbols]

 1, 2 Pipe joint 5 Pipe 10 Main body 11 Flange portion 12 Outer cylinder portion 13 Male screw portion 14 Fitting surface 15 Strip-shaped portion 16 Tapered surface 17 Cylinder portion 18 Fitting portion 19 Conducting hole 20 Male screw portion 21 Hexagon nut portion 30 Pressed tool 31 Slit 32 Ring support piece 33 Stopper 34 Fitting surface 36 Insertion hole 37 Ring holding portion 38 Ring pressing surface portion 39 Guide hole 40 Locking arm 41 Locking protrusion 41a Tapered portion 41b Standing wall portion 42 Inner core Part 44 Flange part 45 Conduction hole 46 O-ring holding part 47 O-ring bearing surface 48 Piston part 49 Pressed part 50 Chuck ring 51 Tapered surface 52 Retained surface 53 Notch part 54 Stroke surface 60 Cover 61 Inner circumference 60a End surface 62 Guide wall 62a Inner peripheral corner 63 Guide hole 64 Locking surface 65 Internal thread 70 O-ring 1 0 main body 112 side outer cylinder portion 113 male screw portion 117 cylinder portion 118 fitting portion 119 conducting hole 120 male screw portion 121 hexagonal nut portion 122 fitting surface 123 end face 130 pressed tool 131 conducting hole 132 inner core portion 133 flange portion 134 Pressed portion 135 Pipe insertion portion 136 Ring holding portion 137 O-ring seat surface 138 Piston portion 139 Fitting recess 140 Locking arm 141 Locking protrusion 141a Tapered portion 141b Tip end surface 142 Locking protrusion 143 Fitting surface 144 O-ring holding part 145 O-ring bearing surface 146 O-ring holding part 147 O-ring bearing surface 148 Piston part 149 Contact surface 150 Lock ring 151 Lock arm 152 Claw 153 Notch part 154 Connecting part 170,171 O-ring 190 Ring support 190a End face 191 Binding arm 192 locking hole 195 ring holding portion 196 insertion opening 197 fitting portion 198 guide surface 200 tapering 201 mating face 202 tube insertion surface 203 tapered surfaces 204 retaining rib 210 assembly

Claims (1)

[Claims] 1. A main body (10) made of a tubular member, and a tubular inner core which is axially movably fitted to an inner periphery of an end of the main body (10) and is inserted into a pipe (5). A tubular member having a portion (42) formed therein, which is pressed by an end surface of the pipe (5) to move toward the main body (10) and moves to a predetermined position with respect to the main body (10). At this time, the pressed tool (30) fixed to the main body (10) moves along with the movement of the pressed tool (30) in the main body (10) direction, and the pressed tool (30) ) Moves to a predetermined position with respect to the main body (10), the outer periphery of the tube (5) is locked and the inner core part (42) of the pressed tool (30) of the tube (5). Tube fixing means (50) for fixing the relative position to the book, and the book of the pressed tool (30) (10) the tube fixing means (50) and engaged with the movement in the direction, at least one engagement means operating said tube locking means (50) (1
6) and a sealing means for sealing between the pressed tool (30) and the main body (10) when the pressed tool (30) moves to a predetermined position with respect to the main body (10). 70) and a pipe joint having.