JP2000320769A - Insertion type pipe joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the insertion of a connection pipe into a joint body surely confirmable, insert the connection pipe into the joint body easily, prevent the action for preventing coming-off of the pipe from being performed unless the pipe is inserted into the joint body by a predetermined amount, remove the pipe from a joint easily, surely confirm the insertion of the pipe into the joint body, and prevent the reduction of flow resistance of fluid flowing in the joint body. SOLUTION: This insertion type pipe joint is constituted in such a way that a rotary member 50 which comes into contact with an outer face of a pipe 40 and rotates is provided in a connection port of a joint body 10 so as to confirm a rotation condition of the rotary member from an outer of the joint body. The rotary member 50 rotates around a shaft provided in the connection port in the joint body. Indication marks 57, 58 allowing to confirm the rotation condition are provided on an outer face of the rotary member. A coming-off prevention member 32 is expanded and shrunk by providing an expanding slot in a part on circumference, and the rotary member is mounted in the expanding slot. The rotary member 50 is mounted in the expanding slot and is locked with a width of the expanding slot, which is changed by the rotation of the rotary member.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plug-in type pipe joint which can be connected only by inserting a pipe end into a connection port of a joint body when connecting with a connecting pipe, and more particularly, to inserting a pipe into a joint body. The present invention relates to a plug-in type pipe joint which can be confirmed even after the degree is inserted.

[0002]

2. Description of the Related Art Conventionally, for example, in Japanese Patent Application Laid-Open No. 2-240492, as shown in FIG. 7, tapered inner peripheral surfaces O and P are provided on an inner surface of a socket of a joint main body S so as to gradually decrease in diameter toward an opening end. The taper inner peripheral surface is provided with a stopper Q which is partially cut off in the circumferential direction, and when the connecting pipe R is about to come off, the taper inner peripheral surfaces O and P reduce the diameter of the stopper Q and the connecting pipe. There is a pipe joint that bites into the outer peripheral surface of R and prevents the connection pipe R from coming out of the joint body S.

Further, the applicant of the present invention disclosed in Japanese Patent Application Laid-Open No. 07-035
In the plug-in type pipe joint 1 described in Japanese Patent Publication No. 281, the cylindrical projection 5 supporting the inner surface of the connecting pipe is provided as shown in FIG.
An O-ring 6 is mounted on the outer surface of the pipe to seal with the pipe 2.
The width of the groove 4 is increased by locking the end 72 of the groove 2. When the connecting pipe 2 is inserted by a predetermined amount, the contact surface 73 of the groove expanding member 7 with the pipe is pushed by the end of the pipe 2. Since the end portion 72 of the groove expanding member 7 is compressed and moved to the inner part, the split groove 31 of the stopper 3
The stopper 3 is reduced in diameter, the indicator 75 of the groove expanding member 7 rises up in the window 8 of the joint body, and the pipe 2 is inserted into the joint body by a predetermined amount. There are fittings that are checked.

[0004]

In the above-mentioned prior art plug-in type pipe joint, the fitting of the joint is usually set to have the same or slightly smaller diameter as the outer diameter of the pipe R connecting the inner diameter of the stopper Q. It is loosely fitted on the inner surface T, and at the same time as the tube R is inserted, the outer surface of the tube R is reduced in diameter by the elastic force of the stopper Q itself, so that the tube R and the stopper Q are integrated when the tube R is pulled out. Retreat,
The stopper Q is reduced in diameter at the tapered inner peripheral surfaces O and P of the main body so that the stopper Q is cut into the pipe R. Therefore, if the chamfer U is not applied to the end of the connecting pipe R to be inserted into the joint body S, the workability is poor because the chamfer U cannot be smoothly inserted. Insertion may not be possible. Also, in the case of a tube made of a soft material such as a resin tube, if the end of the tube R hits the stopper Q, the tube itself bends and cannot be inserted any more. May stick in the axial direction.

[0005] In the latter conventional plug-in type pipe joint 1, when the pipe 2 is inserted by a predetermined amount, the indicator 75 of the groove expanding member 7 is inserted.
Rises into the window 8 of the joint body, and the insertion of the pipe 2 into the joint body 1 is confirmed. However, since the window 8 is provided, the O-ring packing 6 must be provided on the outer surface of the cylindrical projection 5 supporting the inner surface of the tube, so that the inner surface of the tube 2 must be securely sealed. However, in general, the inner diameter of the pipe 2 has a greater variation than the outer diameter, and therefore, when sealing is to be performed at the inner diameter of the pipe 2, a packing having a large cross-sectional area of the ring packing 6 is mounted on the outer surface of the cylindrical projection 5. In order to use the packing 6 having a large cross-sectional area, it is necessary to increase the thickness of the cylindrical protrusion 5. When the thickness of the cylindrical protrusion 5 increases, the thickness of the cylindrical protrusion 5 becomes larger than the inner diameter of the pipe 2. There is a problem that the inside diameter becomes considerably small, and the flow resistance of the fluid flowing in the joint body 1 becomes large, which is not good. Further, when it is necessary to remove the pipe from the joint after connecting the pipe, there is a problem that the pipe cannot be easily removed from the joint. The present invention solves the above-mentioned problems, and makes it possible to confirm the insertion of the connecting pipe into the joint body, so that the connecting pipe is easily inserted into the joint body, and the pipe must be inserted into the joint body by a predetermined amount. Prevents the pipe from being prevented from coming off, and allows the pipe to be easily removed from the joint, so that the pipe can be reliably inserted into the joint body and the flow resistance of the fluid flowing through the joint body does not decrease. The present invention provides a plug-in type pipe joint as described above.

[0006]

SUMMARY OF THE INVENTION The gist of the present invention is to provide a packing for sealing a pipe by inserting an end of the pipe to be connected into a connection port of a joint body and a retaining member for preventing the pipe from falling off. In the attached plug-in type pipe joint, a connecting member of the joint main body is provided with a rotating member that rotates while being in contact with the outer surface of the pipe, so that the rotating state of the rotating member can be checked from the outer surface of the joint main body. It is a plug-in type pipe joint characterized by the following.

In the above, the rotary member is a plug-in type pipe joint characterized in that it rotates around an axis provided at a connection port in a joint body. In the above, the rotary member is a plug-in type pipe joint, wherein the rotary member rotates while an outer peripheral surface of the rotary member is supported by an inner peripheral surface of the joint body. In the above, there is provided a plug-in type pipe joint characterized by providing an indication mark on an outer surface of the rotating member so that a rotation state can be confirmed from an outer surface of the joint body.

In the above, the retaining member for retaining the pipe is expanded and contracted by providing teeth on the inner peripheral surface for engaging with the outer peripheral surface of the pipe and split grooves on a part of the circumference. A plug-in type pipe joint characterized in that it is mounted in a split groove of a retaining member and rotates while being in contact with an outer surface of a pipe. In the above, the rotary member is mounted in the split groove of the retaining member and locked to the split groove width, and is locked to the split groove of the rotary member so that the width of the split groove changes by rotation of the rotary member. This is a plug-in type pipe joint characterized by having a changed width. In the above, there is provided a plug-in type pipe joint, wherein a cylindrical member that supports an inner peripheral surface of a pipe inserted into the connection port is provided at a connection port of the joint body.

[0009]

According to the present invention, the rotating member comes into contact with the outer surface of the pipe inserted into the connection port, so that the rotating member rotates according to the inserted state of the pipe. For this reason, the rotating member rotates in accordance with the insertion state of the pipe inserted into the connection port, and this rotating member can be confirmed from the outer surface of the joint main body, so that the insertion can be confirmed even during or after the insertion of the pipe.
Therefore, the pipe can be securely inserted, no poor connection due to insufficient insertion occurs, and the construction after the connection can be confirmed. By providing the rotating member so as to rotate around a shaft provided at the connection port in the joint main body, the contact with the pipe and the rotation of the rotating member are reliably performed. In addition, the rotating member can be provided so as to rotate while supporting the outer peripheral surface in the joint main body. In this case, the rotating member can be an inexpensive steel ball, resin ball, or roller member. However, the rotating member is rotated according to the insertion state of the pipe,
Confirmation of pipe insertion. At this time, if an indication mark for confirming the rotation state is provided on the outer surface of the rotating member, the insertion of the pipe can be confirmed more reliably.

[0010] Further, the rotating member can be brought into contact with the outer surface of the pipe passing through the inner surface of the retaining member by being mounted in the dividing groove of the retaining member having a dividing groove on a part of the circumference. The rotation member is rotated according to the insertion state of the tube, and insertion can be confirmed. Therefore, the rotating member to be attached to the connection port of the joint body does not have to be separately provided on the end side of the retaining member,
The rotating member can be installed at the mounting position of the retaining member, and the overall length does not increase even if the function of the joint body increases. Further, the rotating member is mounted in the retaining groove of the retaining member by changing the width locked in the dividing groove of the rotating member according to the rotation angle so that the width of the dividing groove changes by rotation of the rotating member. When inserting the pipe, the inner diameter of the retaining member is increased to make it easier to insert the pipe, and the retaining member is gradually reduced in diameter in accordance with the insertion of the pipe, and when the pipe is inserted by a predetermined amount, the retaining action of the pipe works.
The connection is completed automatically.

Further, if a cylindrical member for supporting the inner peripheral surface of the inserted pipe is provided at the connection port of the joint main body, deformation such as flatness of the pipe is corrected, and the pipe is inserted in a perfect circular state, thereby ensuring reliable insertion. A sealing action and a retaining action are performed. When the pipe is removed from the joint after connection, the retaining member is expanded by rotating the rotating member to the initial setting position, so that the retaining member is released from biting into the pipe, and the pipe is easily removed from the joint. Can be removed.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a longitudinal sectional view showing a state before pipe insertion, and a plug-in type pipe joint 10 is provided integrally by screwing a main body 11 and a main body 20 together. The main body 11 has a through-hole at the center portion through which a fluid passes, and a cylindrical member 13 extending toward the connection port side with the pipe 40. It is provided in. The outer periphery of the cylindrical member 13 is a receiving port 14 of a pipe 40, has a packing mounting step 15 on the outside thereof, and is provided with a male screw 16 on the outer surface thereof.
0 and screwed together. Packing mounting step 15
, A resin retainer 31 is sandwiched and fixed between the main body 11 and the main body 20 to hold the rubber packing 30, and is compressed on the outer surface of the inserted tube 40, and seals with the tube. Do. A retainer 32 is mounted on an end of a retainer 31 sandwiched between the main body 11 and the main body 20. The inner surface of the retainer mounting portion 17 has a tapered inner surface 2.
1.

As shown in FIG. 5, the stopper 32 has a C-ring shape having a split groove 33 in a part of the circumference thereof.
0 to form an annular tooth 34 for cutting into the outer peripheral surface of the main body 20 to block the tube 40.
It is provided on the outer surface of the taper that comes into contact with the taper. In addition, stopper 3
Reference numeral 2 denotes an annular tooth 33 in which the inner diameter is set to be smaller than the outer diameter of the connection pipe 40 in a free state, and the whole is formed of a hard resin or metal having elasticity capable of expanding the diameter. 3 and 4
As shown by the arrow, the rotating member 5 is
0 is attached. As shown in FIGS. 3 and 4, a rotating member mounting portion 22 which is open on the outer surface is provided on a part of the circumference of the retaining device mounting portion 17 of the main body 20. The rotating member mounting portion 22 is provided with a shaft hole 23 in a direction perpendicular to the main body shaft, and the shaft-equipped rotating plate 51 of the rotating member 50 is rotatably held in the shaft hole 23 in the split groove 33 of the retaining member 32. It is rotatably mounted.

As shown in FIG. 6, the rotating member 50 comprises a rotating disk 51 having a rubber ring 52 mounted at the center and an operating shaft 53. The rotating disk 51 is inserted into the rotating member mounting portion 22, and the operating shaft 53 is mounted. Insert from the outside of the shaft hole 23 of the main body and attach it,
The rotating member 50 is rotatably mounted in the rotating member mounting portion 22. A rubber ring 52 is provided so as to supplement the frictional force with the outer peripheral surface of the pipe. A locking side portion 54 that sequentially changes the width of the split groove 33 of the stopper in accordance with the rotation angle is provided on a side portion of the turntable 51.
Is provided so that both sides of the rotating member 50 are sandwiched between the split grooves 33 of the stopper 32. The end of the operation shaft 53 is exposed on the outer surface of the main body 20, and a driver groove 55 is provided for rotating the exposed operation shaft with a hand tool such as a driver. Since the rotary disk 51 can be rotated by rotating the operation shaft 53 from the outside, the initial position of the rotary disk 51 can be set, and after the pipe is inserted and connected, the rotary disk 51 is rotated so that the stopper 32 bites into the pipe. Remove from
It can be detached from the joint body.

Before the pipe is inserted, the rotation angle of the rotary member 50 is set such that the locking side portion 54 is located at the position of the maximum width portion 56 as shown in FIG. And the inner diameter of the stopper 32 is increased. Recess 5
7 and a convex portion 58 are indication portions for confirming the rotation angle of the rotating member. In the embodiment, the concave portion 57 projects to the outer surface before inserting the tube, and the rotating member 50 is connected to the outer surface of the tube after inserting the tube. The protrusion 58 is provided at a position where the protrusion 58 protrudes from the outer surface of the main body 20 by rotating due to the friction. Further, another projection 59 abuts on the outer surface of the stopper 32 in the initial state before the pipe insertion,
It is provided to set the initial state of the rotating member 50.

When the tube 40 is inserted from the state shown in FIGS. 1 and 3, the rubber ring 52 of the rotating member 50 comes into contact with the outer surface of the tube, and the frictional force of the rubber ring causes the rotating member to be inserted clockwise in the drawing. Rotate accordingly. At this time, since both sides of the rotating disk 51 are sandwiched by the split grooves 33 of the stoppers 32, and the width of the locking side portions 54 is formed so as to gradually decrease in the clockwise direction. Split groove 5 according to the rotation angle
The width of the stopper 3 is reduced by the elastic force of the stopper 32, and the inner diameter of the stopper 32 is reduced. Therefore, when inserting the tube 40,
The inner diameter of the stopper 32 is enlarged, and the stopper 40 can be easily inserted without damaging the outer peripheral surface of the tube 40. After the tube is inserted, the inner diameter of the stopper 32 is reduced, and the inner surface is annular. Tooth 3
4 penetrates into the outer surface of the inserted pipe, and the pipe is
Prevent it from being pulled out of.

Further, since the rotating disk 51 can be rotated by operating the operating shaft 53 from outside the joint, for example, the initial position of the rotating disk 51 before inserting the pipe can be set, and the pipe 40 can be detached after inserting the pipe. By operating the operation shaft 53 and rotating the turntable 51 also when it is desired to make the retaining member 32 larger in diameter and disengaged from the state of biting with the pipe,
The tube can be disconnected from the fitting body. In this embodiment, the rotating member 50 is supported by the operation shaft 53.
The rotating disk 51 may be rotatably supported and mounted on the inner surface of the rotating disk 51. Further, the frictional force between the rotating member 50 and the pipe 40 is provided so as to be supplemented by the frictional force of the rubber ring 52.
Alternatively, the outer diameter of the rotating disk 51 may be provided so as to be in contact with the tube, and a knurl may be formed on the outer surface to supplement the frictional force with the outer surface of the tube.

[0018]

As described above, the plug-in type pipe joint of the present invention can indicate the inserted state of the pipe, so that the connection work can be performed in a correct connection state, and it is possible to confirm whether or not the connection is correctly performed even after the connection. . In addition, if a predetermined amount is not inserted, an initial bite by the stopper is not performed, so that a connection failure in an incompletely inserted state does not occur. When the pipe is correctly inserted by a predetermined amount, the initial bite engagement with the pipe is reliably performed, so that the stopper is reduced in diameter by the tapered inner surface of the main body when the pipe is pulled out, and the pulling out of the pipe is reliably prevented. Also, after the connection, the rotating member is rotated to release the pull-out tool from biting with the pipe, and the pipe can be easily released from the joint body. In addition, the pipe can be easily inserted and inserted into the joint body, and the workability is good. Also, since the outer peripheral surface of the tube is not damaged when the tube is inserted and inserted, the sealability by the packing is good. In addition, since the cylindrical member supporting the inner peripheral surface of the pipe is not provided with packing, the thickness of the cylindrical member can be formed with a minimum thickness in terms of strength, the inner diameter of the cylindrical member can be increased, and a joint having a small fluid flow resistance can be used. it can.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention before a tube is inserted.

FIG. 2 is a longitudinal sectional view showing a state after insertion of a tube according to one embodiment of the present invention.

FIG. 3 is a cross-sectional view showing a main part of FIG. 1 according to one embodiment of the present invention.

FIG. 4 is a cross-sectional view showing a main part of FIG. 2 according to one embodiment of the present invention.

FIG. 5 is an external perspective view showing a biting member of one embodiment of the present invention.

FIG. 6 is a side view showing a rotating member according to one embodiment of the present invention.

FIG. 7 is a sectional view of a connecting portion of a bayonet joint showing a conventional technique.

FIG. 8 is a longitudinal sectional view showing another conventional technique.

DESCRIPTION OF SYMBOLS 10 Plug-in type pipe joint 11 Main body 13 Cylindrical member 15 Packing mounting part 16 Male screw 17 Retainer mounting part 20 Main body 21 Taper inner surface 22 Rotating member mounting part 23 Shaft hole 30 Rubber packing 31 Retainer 32 Retainer 33 Split Groove 34 Annular Teeth 40 Connecting Pipe 50 Rotating Member 51 Rotating Disk 52 Rubber Ring 53 Operating Shaft 54 Locking Side 55 Driver Groove 56 Maximum Width 57 Depression 58 Convex 59 Different Convex

Claims (7)

[Claims] 1. A plug-in type pipe joint equipped with a packing for sealing the pipe by inserting an end of the pipe to be connected into a connection port of the joint body and a retaining member for preventing the pipe from falling off, A plug-in type pipe joint, characterized in that a rotary member which rotates in contact with the outer surface of the pipe is provided at a connection port of the joint body so that the rotation state of the rotary member can be checked from the outer surface of the joint body. 2. The plug-in type pipe joint according to claim 1, wherein the rotating member rotates around an axis provided at a connection port of the joint body. 3. The plug-in type pipe joint according to claim 1, wherein the rotating member rotates while an outer peripheral surface of the rotating member is supported by an inner peripheral surface of the joint body. 4. The plug-in type pipe joint according to claim 1, wherein an indication mark is provided on an outer surface of said rotating member so that a rotation state can be confirmed from an outer surface of said joint body. 5. A retaining member for retaining the tube, wherein the retaining member is provided on the inner peripheral surface thereof with teeth which are engaged with the outer peripheral surface of the tube and a groove is provided on a part of the circumference to expand and contract the rotating member. The plug-in type pipe joint according to any one of claims 1 to 4, wherein the pipe joint is mounted in a split groove of the retaining member. 6. The split member of the rotary member is mounted in the split groove of the retaining member and locked to the split groove width, and the width of the split groove is changed by rotation of the rotary member. 6. The plug-in type pipe joint according to claim 1, wherein the width of the lock is changed. 7. The plug-in pipe according to claim 1, wherein a cylindrical member for supporting an inner peripheral surface of the pipe inserted into the connection port is provided at a connection port of the joint body. Fittings.