Ring material

Abstract

To provide a ring member capable of reducing shearing force to work on a connection member when abutting on a lock ring.SOLUTION: A ring member 20 is used for a pipe joint 10 the removal of which is prevented by the abutment of an insertion port protrusion part formed on an outer periphery 12a of an insertion port 12 on a lock ring 13 arranged in a socket 11. The ring member 20 is fitted into an annular groove 18 formed in the outer periphery 12a of the insertion port 12 to form the insertion port protrusion part. The ring member 20 is constructed by a body 21 having a one-cut shape in the peripheral direction. Peripheral thin wall parts 23, 24 constituting a split part 22 of the body 21 are arranged overlapping each other in the radial direction of the pipe joint 10, and connected to each other with a tapping screw 29. The inner periphery side thin wall part 23 is fitted into the annular groove 18. The outer periphery side thin wall part 24 has an engagement portion 26 for engaging with the inner periphery side thin wall part 23 when the body 21 abuts on the lock ring 13.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a ring member used in a pipe fitting in which a pipe insertion protrusion formed on the outer periphery of the pipe insertion port is abutted against a lock ring arranged inside the receiving port to prevent separation, and which forms the insertion port protrusion by being fitted into a groove formed on the outer periphery of the insertion port. [Background technology]

[0002] Conventionally, an example of this type of ring member is the ring member shown in Patent Document 1. The ring member of Patent Document 1 is fitted into a groove formed on the outer periphery of the insertion port of the pipe, thereby forming an insertion port protrusion on the outer periphery of the insertion port of the pipe to prevent the pipe from coming off. The ring member of Patent Document 1 has one end and the other end in the circumferential direction constituting a divided portion, which are arranged overlapping in the radial direction of the pipe, and are connected by a connecting member.

[0003] When the insertion port tries to separate from the socket due to an earthquake or the like, the ring member of Patent Document 1 comes into contact with the lock ring, and the lock ring exerts a force to prevent separation, restricting the insertion port from shifting in the direction in which it separates from the socket (the separation direction). Therefore, it is possible to prevent the insertion port from separating from the socket due to an earthquake or the like. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 9-196262 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the ring member of Patent Document 1, when the lock ring comes into contact with the ring, the lock ring exerts a force to prevent the ring from coming off, causing the one end (or the other end) that comes into contact with the lock ring to shift position relative to the other end (or the one end) that is fitted into the groove in the direction opposite to the direction in which the insertion port is removed. As a result, a shear force acts on the connecting member that connects the one end and the other end. Therefore, in the ring member of Patent Document 1, the action of the shear force may cause damage or deformation of the connecting member, which may reduce the earthquake resistance of the ring member.

[0006] An object of the present invention is to provide a ring member that can reduce the shear force acting on a connecting member when it comes into contact with a lock ring. [Means for solving the problem]

[0007] In order to achieve the above object, the ring member of the present invention is used in a pipe joint in which an insertion port protrusion formed on the outer periphery of a pipe is abutted against a lock ring disposed inside a receiving port to prevent separation, and the ring member forms the insertion port protrusion by being fitted into a groove formed on the outer periphery of the insertion port, and is constituted by a main body divided in the circumferential direction, and one end and the other end in the circumferential direction constituting the divided part of the main body are arranged overlapping in the radial direction of the pipe, and In the radial direction of the tube The tubes are connected by a connecting member, and a radially inner portion of either the one end or the other end is fitted into the groove, and one of the one end and the other end has an engagement portion that engages with the other end when the main body abuts against a lock ring. The engagement portion has a first vertical surface with which the one end and the other end engage in a removal direction of the insertion port, and a second vertical surface with which the groove engages, and is fitted between the first vertical surface and a side wall of the groove from the outside in the radial direction of the tube. It is something.

[0008] With this, when the anti-detachment force of the lock ring acts on the ring member (main body) due to contact with the lock ring, the shear force acting on the connecting member can be reduced.

[0009] In the ring member of the present invention, the engagement portion is provided on the side of the one end that abuts against the lock ring.

[0010] According to this, the one end and the other end constituting the divided portion of the main body can be engaged in a portion close to the portion that abuts against the lock ring.

[0011] In the ring member of the present invention, the engagement portion is provided on a radially inner portion of the tube at the one end portion that abuts against the lock ring.

[0012] This allows one end and the other end constituting the divided portion of the main body to be engaged in a portion close to the portion that abuts against the lock ring and in the groove of the insertion port. Effect of the Invention

[0013] According to the ring member of the present invention, one of the ends of the main body constituting the ring member has an engagement portion that engages with the other end when the ring member (main body) abuts against the lock ring, so that when the insertion port is misaligned with the receiving port and the ring member (main body) abuts against the lock ring, the shear force acting on the connecting member from the direction opposite to the removal direction of the insertion port can be received via the engagement portion. Therefore, when the anti-detachment force of the lock ring acts on the ring member (main body) due to the abutment with the lock ring, the shear force acting on the connecting member can be reduced. Therefore, the load on the connecting member is reduced, and the seismic resistance of the ring member can be improved. [Brief description of the drawings]

[0014] [Figure 1] 1 is a cross-sectional view of a separation prevention pipe joint using a spigot having a ring member attached thereto according to one embodiment of the present invention. [Diagram 2] 13 is a diagram showing the state in which the ring member is attached to the annular groove of the insertion port. FIG. [Diagram 3] 3 is a cross-sectional view taken along line AA in FIG. 2, showing a state before the inner peripheral thin portion and the outer peripheral thin portion are connected to each other. [Figure 4] 3 is a cross-sectional view taken along the line AA in FIG. 2, showing a case where the insertion port is misaligned with respect to the receiving port. [Diagram 5]13 is a diagram showing a case where the insertion port is misaligned with the receiving port in the ring member according to the first alternative embodiment of the present invention. FIG. [Figure 6] 13 is a diagram showing a case where the insertion port is misaligned with the receiving port in the ring member according to the second alternative embodiment of the present invention. FIG. [Figure 7] 13 is a diagram showing a case where the insertion port is misaligned with the receiving port in the ring member according to the third alternative embodiment of the present invention. FIG. [Figure 8] 13 is a diagram showing a case where the insertion port is misaligned with the receiving port in the ring member according to the fourth alternative embodiment of the present invention. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] The ring member 20 of the present invention will now be described.

[0016] As shown in FIGS. 1 and 2, a ring member 20 according to one embodiment of the present invention is used in a pipe joint 10 (an example of a "pipe").

[0017] The pipe fitting 10 is composed of a socket 11 formed at the end of one of the pipes to be joined, and a spigot 12 formed at the end of the other pipe to be joined. In the pipe fitting 10, a spigot protrusion formed on the outer periphery 12a of the spigot 12 abuts against a lock ring 13 arranged inside the socket 11, thereby preventing the spigot 12 from coming off the socket 11. Here, the ring member 20 functions as the spigot protrusion in the pipe fitting 10.

[0018] A rubber seal 15 is fitted into a seal material receiving groove 14 formed on the inner periphery of the tip of the socket 11. A lock ring 13 is fitted into a lock ring receiving groove 16 formed on the inner periphery of the socket 11, further back than the seal material receiving groove 14. A resin centering ring 17 is interposed between the inner periphery of the lock ring receiving groove 16 and the outer periphery of the lock ring 13 to align the axis of the lock ring 13 with the axis of the socket 11.

[0019] The insertion port 12 is inserted into the inside of the socket 11. An annular groove 18 (one example of a "groove") is formed on the outer periphery 12a of the tip of the insertion port 12. A ring member 20 is fitted into the annular groove 18.

[0020] The ring member 20 is fitted into the annular groove 18 to form an insertion port protrusion in the insertion port 12. As shown in Fig. 2, the ring member 20 is composed of a main body 21 that is divided in the circumferential direction. The ring member 20 has thin-walled portions 23, 24 formed at one end and the other end in the circumferential direction that constitute a divided portion 22 of the main body 21, respectively.

[0021] The thin-walled portions 23, 24 are arranged overlapping each other in the radial direction of the ring member 20 (the radial direction of the pipe joint 10). The divided portion 22 of the main body 21 is formed so that the sum of the thickness of the inner circumferential thin-walled portion 23 (the radial thickness of the ring member 20) and the thickness of the outer circumferential thin-walled portion 24 (the radial thickness of the ring member 20) is equal to the thickness of the main body 21 other than the divided portion 22 (the radial thickness of the ring member 20). The thin-walled portions 23, 24 are overlapped over a certain length in the circumferential direction and are formed longer in the circumferential direction than the overlapping portion. By forming the thin-walled portions 23, 24 in this manner, the ring member 20 can expand and contract in diameter to a certain extent while maintaining the overlapping of the thin-walled portions 23, 24 with each other.

[0022] As shown in Figs. 2 and 3, the inner circumferential thin portion 23 is a flat thin portion formed at one end of the divided portion 22 of the main body 21. The inner circumferential thin portion 23 is disposed on the inner circumferential side of the ring member 20 when overlapping with the outer circumferential thin portion 24. The inner circumferential thin portion 23 is fitted into the annular groove 18 of the insertion port 12 when the ring member 20 is attached to the outer periphery 12a of the insertion port 12. The inner circumferential thin portion 23 is formed with a thickness (thickness in the radial direction of the ring member 20) that is approximately the same as the depth of the annular groove 18 in the radial direction of the insertion port 12, or a thickness that is slightly smaller than the depth of the annular groove 18. That is, the inner circumferential thin portion 23 is configured to be fitted into the annular groove 18 in its entirety. The inner thin portion 23 is formed so that its widthwise thickness (the axial thickness of the ring member 20) is smaller than the widthwise length of the annular groove 18 (the axial length of the pipe joint 10).

[0023] The outer peripheral thin portion 24 is a thin portion formed at the other end of the divided portion 22 of the main body 21, and is formed so that the cross section viewed from the width direction (axial direction of the ring member 20) side is substantially L-shaped. The outer peripheral thin portion 24 is disposed on the outer peripheral side of the ring member 20 when overlapping with the inner peripheral thin portion 23. When the ring member 20 is attached to the outer periphery 12a of the insertion port 12, the inner peripheral thin portion 23 is fitted into the annular groove 18 of the insertion port 12, so that the outer peripheral thin portion 24 protrudes from the outer peripheral surface of the insertion port 12. That is, the outer peripheral thin portion 24 functions as an insertion port protrusion in the insertion port 12, and abuts against the lock ring 13 when the insertion port 12 is about to be removed from the socket 11.

[0024] 3 and 4, the outer peripheral thin-walled portion 24 is composed of a thin-walled portion 25 and an engagement portion 26. The thin-walled portion 25 is placed on the upper surface of the inner peripheral thin-walled portion 23, and functions as an insertion port protrusion in the insertion port 12 to abut against the lock ring 13. The thin-walled portion 25 has an inclined surface 27 formed on one side in its width direction (axial direction of the ring member 20). Here, the one side in the width direction refers to the opposite side to the side that abuts against the lock ring 13 in the width direction of the ring member 20 (thin-walled portion 25) (the side that becomes the tip side of the insertion port 12 when the ring member 20 is attached to the insertion port 12).

[0025] The engagement portion 26 is a portion that engages with the inner circumferential thin portion 23 when the thin portion 25 abuts against the lock ring 13. The engagement portion 26 is formed on the other side of the outer circumferential thin portion 24 (thin portion 25) in the width direction (axial direction of the ring member 20). Here, the other side in the width direction refers to the side of the ring member 20 (thin portion 25) that abuts against the lock ring 13 in the width direction (the side that becomes the base end side of the insertion port 12 when the ring member 20 is attached to the insertion port 12). The engagement portion 26 is formed protruding from one side in the thickness direction (radial direction of the ring member 20) of the outer circumferential thin portion 24 (thin portion 25). Here, the one side in the thickness direction refers to the inner circumferential surface side of the ring member 20 in the outer circumferential thin portion 24 (thin portion 25), and the side that faces the radial inside of the insertion port 12 when the ring member 20 is attached to the outer periphery 12a of the insertion port 12. The engagement portion 26 is fitted into the annular groove 18 of the insertion port 12 when the ring member 20 is attached to the outer periphery 12a of the insertion port 12. The engagement portion 26 is formed so that its protruding length (the radial length of the ring member 20) is approximately the same as the depth of the annular groove 18 in the radial direction of the insertion port 12, or is slightly shorter than the depth of the annular groove 18.

[0026] A connecting hole 28 is formed at one location of the outer peripheral thin portion 24, penetrating the ring member 20 in the radial direction. A large diameter portion 28a is formed in the connecting hole 28 on the outer peripheral surface side of the outer peripheral thin portion 24. The outer peripheral thin portion 24 and the inner peripheral thin portion 23 are connected to each other by a tapping screw 29 (an example of a "connecting member") inserted into the connecting hole 28. The inner peripheral thin portion 23 is connected to the outer peripheral thin portion 24 in a state where it is disposed in a portion formed by the lower surface of the thin portion 25 of the outer peripheral thin portion 24 (a first horizontal surface 25a on the radial inner side of the ring member 20) and the inner surface of the engagement portion 26 (a first vertical surface 26a on the axial inner side of the ring member 20). That is, the inner peripheral thin portion 23 is held in the annular groove 18 in a state where it is covered by the thin portion 25 and the engagement portion 26 of the outer peripheral thin portion 24. Therefore, the inner circumferential thin portion 23 and the outer circumferential thin portion 24 are disposed in the annular groove 18 so as to overlap in the axial direction of the ring member 20 (the axial direction of the insertion port 12).

[0027] Next, the function of the ring member 20 will be described. As shown in Fig. 4, when the insertion port 12 to which the ring member 20 is attached attempts to be removed from the receiving port 11, the ring member 20 abuts against the lock ring 13. At this time, at the divided portion 22 of the main body 21 of the ring member 20, the outer circumferential thin portion 24 abuts against the lock ring 13. As the ring member 20 abuts against the lock ring 13, the positional displacement of the insertion port 12 in the removal direction R is restricted by the lock ring 13.

[0028] On the other hand, by abutting against the lock ring 13, the ring member 20 receives the anti-detachment force from the lock ring 13 in the direction opposite to the removal direction R of the insertion port 12. At this time, in the divided portion 22 of the main body 21 of the ring member 20, the anti-detachment force from the lock ring 13 is received at the outer circumferential thin portion 24. More specifically, the outer circumferential thin portion 24 receives the anti-detachment force from the lock ring 13 at the second vertical surface 25b of the thin portion 25 on the side of the removal direction R of the insertion port 12 (the base end side of the insertion port 12).

[0029] The outer circumferential thin portion 24 receives the anti-detachment force from the lock ring 13 and attempts to shift in position relative to the inner circumferential thin portion 23 in the direction opposite to the removal direction R of the insertion port 12. At this time, in the engagement portion 26 of the outer circumferential thin portion 24, the first vertical surface 26a on the side opposite to the removal direction R of the insertion port 12 comes into contact (engages) with the third vertical surface 23a on the removal direction R side of the insertion port 12 (the base end side of the insertion port 12) of the inner circumferential thin portion 23 within the annular groove 18. As a result, the anti-detachment force from the lock ring 13 is received by the third vertical surface 23a of the inner circumferential thin portion 23 via the engagement portion 26 of the outer circumferential thin portion 24, thereby restricting the outer circumferential thin portion 24 from shifting in position relative to the inner circumferential thin portion 23 in the direction opposite to the removal direction R of the insertion port 12. For this reason, even if the outer peripheral thin-walled portion 24 is subjected to an anti-detachment force by the lock ring 13, the outer peripheral thin-walled portion 24 is less likely to shift in position relative to the inner peripheral thin-walled portion 23, and the shear force acting on the tapping screw 29 due to the shift in position of the outer peripheral thin-walled portion 24 is reduced.

[0030] As described above, according to this embodiment, the outer peripheral thin portion 24 of the main body 21 constituting the ring member 20 has the engagement portion 26 that engages with the inner peripheral thin portion 23 when the ring member 20 (main body 21) abuts against the lock ring 13. Therefore, when the insertion port 12 is displaced relative to the socket 11 and the ring member 20 (main body 21) and the lock ring 13 abut against each other, the shear force acting on the tapping screw 29 from the direction opposite to the removal direction R of the insertion port 12 can be received via the engagement portion 26. Therefore, when the anti-detachment force of the lock ring 13 acts on the ring member 20 (main body 21) due to the abutment with the lock ring 13, the shear force acting on the tapping screw 29 can be reduced. Therefore, the load on the tapping screw 29 is reduced, and the seismic performance of the ring member 20 can be improved.

[0031] In this embodiment, the engaging portion 26 is provided on the side of the outer circumferential thin portion 24 where the thin portion 25 abuts against the lock ring 13 (the side that becomes the base end side of the insertion port 12 (the side in the removal direction R of the insertion port 12) when the ring member 20 is attached to the insertion port 12), but this is not limited to this, and the engaging portion 26 may be provided near the center of the outer circumferential thin portion 24, as in the ring member 20A (first alternative embodiment) shown in Figure 5. In this case, a first recess 23b that can engage with the engaging portion 26 is formed near the center of the inner circumferential thin portion 23.

[0032] In addition, in this embodiment, the engagement portion 26 is provided on the outer peripheral thin portion 24, but this is not limited to this, and the engagement portion 26 may be provided on the inner peripheral thin portion 23, as shown in Figures 6 to 8.

[0033] When the engaging portion 26 is provided on the inner thin portion 23, as in the ring member 20B (second alternative embodiment) shown in Fig. 6, the engaging portion 26 is formed on the side where the ring member 20 abuts against the lock ring 13 (the side that becomes the base end side of the insertion port 12 (the side in the removal direction R of the insertion port 12) when the ring member 20 is attached to the insertion port 12). In this case, the engaging portion 26 contacts (engages) with the second vertical surface 25b of the outer thin portion 24 on the side where the ring member 20 abuts against the lock ring 13.

[0034] 7 (third alternate embodiment), the engaging portion 26 is formed on the side opposite to the side where the ring member 20 abuts against the lock ring 13 (the side that becomes the tip side of the insertion port 12 (the side opposite to the removal direction R of the insertion port 12) when the ring member 20 is attached to the insertion port 12). In this case, the engaging portion 26 contacts (engages) with the fourth vertical surface 25c on the outer circumferential thin portion 24 opposite to the side where the ring member 20 abuts against the lock ring 13.

[0035] Furthermore, when the engaging portion 26 is provided on the inner thin portion 23, as in the ring member 20D (fourth alternative embodiment) shown in Fig. 8, the engaging portion 26 is formed near the center of the inner thin portion 23. In this case, a second recess 25d that can engage with the engaging portion 26 is formed near the center of the outer thin portion 24.

[0036] Furthermore, in this embodiment, the inner thin-walled portion 23 and the outer thin-walled portion 24 are connected by tapping screws 29, but this is not limited to this and they may be connected by connecting members such as rivets. [Explanation of symbols]

[0037] 10 Pipe fittings (pipes) 11 socket 12 Insertion port 12a Outer circumference of insertion port 13 Lock Ring 18 Annular groove (groove) 20 Ring member 21 Main unit 22 Division 23 Inner thin section (other end) 24 Thin outer periphery (one end) 26 Engagement part 29 Tapping screw (connecting member)

Claims

1. The lock ring is disposed inside the socket, and the lock ring is disposed on the outer periphery of the socket of the pipe. The lock ring is disposed inside the socket of the pipe ... A ring member that forms the insertion port protrusion by being fitted into a groove portion formed on an outer periphery of the insertion port, It is composed of a single circumferentially split main body, The one end and the other end in the circumferential direction constituting the divided portion of the main body are arranged to overlap each other in the radial direction of the pipe and are connected in the radial direction of the pipe by a connecting member, A radially inner portion of either the one end portion or the other end portion of the tube is fitted into the groove portion, One of the one end and the other end has an engagement portion that engages with the other end when the main body abuts against a lock ring, The engagement portion, in a removal direction of the insertion port, a first vertical surface where the one end and the other end engage; a second vertical surface that engages the groove; The groove is fitted between the first vertical surface and a side wall of the groove from the outside in the radial direction of the pipe. A ring member comprising:

2. The engaging portion is provided on the side of the one end that comes into contact with the lock ring. The ring member according to claim 1 .

3. The engaging portion is provided on a radially inner portion of the one end of the pipe that abuts against the lock ring. The ring member according to claim 1 or 2, characterized in that

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