JP4318359B2 - Separation prevention device for pipe joints - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention provides an outer peripheral surface of an insertion tube portion inserted and connected to the receiving tube portion, and an inner peripheral surface of a press ring fixedly connected to the receiving tube portion from the tube axis direction in a state of covering the insertion tube portion. In addition, the present invention relates to an apparatus for preventing separation of a pipe joint portion provided with a retaining member capable of biting into the outer peripheral surface of the insertion tube portion and a pressing means for pressing the retaining member against the outer peripheral surface of the insertion tube portion.
[0002]
[Prior art]
As shown in FIGS. 10 and 11, as this type of pipe joint detachment preventing device, a recess 9 is provided on the inner peripheral surface of the pusher wheel 4 so that a retaining member 50 can be detachably attached from the inside in the radial direction of the pipe. The bolt 11 constituting the pressing means A for applying a pressing force inward in the pipe radial direction to the retaining member 50 in the recess 9 is screwed from the outer peripheral surface side of the presser wheel 4. With the flat cam surface 11a formed at the tip of the bolt 11 and the inclined outer surface 50a of the retaining member 50, the receiving pipe part 1 and the insertion pipe part 2 are relatively separated in the tube axis X direction. Accordingly, the cam means B for displacing the retaining member 50 inward in the pipe radial direction is configured, and the inner surface 50b of the retaining member 50 is bitten by the outer peripheral surface 2a of the insertion tube portion 2 along the pipe circumferential direction. Two first biting protrusions 50A that can be inserted, and the insertion tube portion 2 along the tube axis X direction There has been proposed one in which one second biting protrusion 50B that can bite into the outer peripheral surface 2a is integrally formed in a state of being arranged in a substantially square shape (for example, JP-A-7-280147). (See publication)
[0003]
[Problems to be solved by the invention]
In the conventional apparatus for preventing disconnection of a pipe joint, when a bolt that constitutes the pressing means A is tightened to apply a pressing force inward in the pipe radial direction to the retaining member 50, the inner surface of the retaining member 50 is applied. The formed first biting protrusion 50A and the second biting protrusion 50B bite into the outer peripheral surface 2a of the insertion pipe part 2, and the tube axis X of the connected receiving pipe part 1 and insertion pipe part 2 In addition to being able to exhibit a separation preventing function that inhibits relative movement in the direction, it is also possible to exhibit a rotation preventing function that inhibits relative rotation between the receiving tube portion 1 and the insertion tube portion 2. Even when devices such as air valves and fire hydrants are connected in the middle of the piping system and these devices must be maintained in a specific posture, special anti-rotation measures are required to maintain the specific posture of the device. Support work is not required, and pipe connection work costs can be reduced. Kill.
However, conventionally, since the first biting protrusion 50A and the second biting protrusion 50B having different directions are formed on the inner surface of the retaining member 50, for example, the retaining member manufactured by casting. When the 50 first biting projections 50A and the second biting projections 50B are cut, it is easy to take time, especially when the first biting projections 50A and the second biting projections 50B are continuous or close to each other. However, there is a problem that requires a lot of labor for cutting.
[0004]
The present invention has been made in view of the above-described actual situation, and the main problem is that it is efficiently performed with a reasonable modification to the retaining member while reliably exhibiting an excellent separation prevention function and rotation prevention function. An object of the present invention is to provide an apparatus for preventing separation of a pipe joint that can be easily manufactured.
[0005]
[Means for Solving the Problems]
The configuration of the present invention includes an outer peripheral surface of an insertion tube portion that is inserted and connected to the receiving tube portion, and an inner part of a press ring that is fixedly connected to the receiving tube portion from the tube axis direction in a state of being sheathed on the insertion tube portion. An anti-separation device for a pipe joint portion provided with a retaining member that can be inserted into the outer peripheral surface of the insertion tube portion and a pressing means for pressing the retaining member against the outer peripheral surface of the insertion tube portion. Because
Formed on the inner surface of the retaining member is a first biting projection that can bite into the outer peripheral surface of the insertion tube portion along a direction in which the component in the tube circumferential direction is the main component. A detent member provided with a second biting projection that can bite into the outer peripheral surface of the insertion tube along the direction including the component in the core direction may be provided .
[0006]
According to the above configuration, when the retaining member is pressed against the outer peripheral surface side of the insertion tube portion by the pressing means, the first biting projection portion and the second biting projection portion bite into the outer peripheral surface of the insertion tube portion, The first biting protrusion along the direction in which the direction component is the main component, and exhibiting a separation preventing function that prevents the relative movement of the connected receiving tube portion and insertion tube portion in the tube axis direction. In addition, the second anti-rotation function of preventing the relative rotation between the receiving tube portion and the insertion tube portion can be exhibited by having the second biting protrusion along the direction including the component in the tube axis direction.
In addition, the first biting projection is formed on the inner surface of the retaining member, and the second biting projection is formed on the anti-rotation member provided on the retaining member. The protrusion or the second biting protrusion does not hinder the processing of the other second biting protrusion or the first biting protrusion.
Therefore, with a simple and inexpensive modification that simply provides a detent member with a second biting projection on the retaining member, it can be manufactured efficiently and easily while ensuring excellent separation prevention and anti-rotation functions. be able to.
[0007]
In the configuration of the present invention, the detent member may be configured to be detachable from the retaining member .
According to the above configuration, when equipment such as an air valve or a fire hydrant is connected in the middle of the piping system and it is necessary to maintain the equipment in a specific posture, the stopper provided with the first biting protrusion By attaching a detent member with a second biting protrusion to the member, it is possible to prevent both relative separation movement and relative rotation in the tube axis direction between the connected receiving tube portion and insertion tube portion. , The device can be maintained in a specific posture.
In addition, when the piping system is buried in the ground and external force in the circumferential direction such as rotational force or torsional force is applied due to uneven settlement, earthquake, etc., the first biting protrusion is provided. By removing the anti-rotation member having the second biting protrusion from the retaining member, it is possible to prevent the relative separation movement between the connected receiving tube portion and the inserting tube portion, but the receiving tube portion and the inserting tube. The external force in the pipe circumferential direction can be absorbed by the relative rotation with the section.
Therefore, with respect to the retaining member provided with the first biting projection, it is provided with an anti-separation function and an anti-rotation function with a simple operation of simply removing the detent member provided with the second biting projection. Can be used separately, and those with only a function to prevent separation.
[0008]
The structure of this invention exists in the point by which the adjustment means which adjusts the protrusion margin of the 2nd biting projection part from the inner surface of a retaining member is provided between the said retaining member and the rotation preventing member.
According to the above configuration , the adjustment margin provided between the retaining member and the anti-rotation member can freely adjust the protrusion margin of the second biting projection from the inner surface of the retaining member. An anti-rotation force can be obtained in accordance with conditions such as the material of the pipe part and the retaining member and the shape of each biting protrusion.
[0009]
In the configuration of the present invention, the second biting protrusion may be formed in an annular shape along a direction including a component in the tube axis direction and a component in the tube circumferential direction .
According to the above configuration , not only can the second biting protrusion be able to exhibit the separation prevention function and the rotation prevention function, but also the second biting protrusion can be cut efficiently and easily. .
[0010]
Configuration of the present invention, the adjusting means includes a female screw mounting holes formed through the stop member, or may be composed of a male screw formed on the outer circumferential surface of the anti-rotation member.
According to the above configuration, it is possible to use a screw for mounting detachably the detent member in the retaining member, advantageously fabricated adjustment means in manufacturing cost.
[0011]
According to the configuration of the present invention , a recess for removably mounting a retaining member is formed at a plurality of locations on the inner peripheral surface of the push wheel and at a predetermined interval in the pipe circumferential direction. At least one of the members may be provided with the anti-rotation member .
According to the above configuration , as the retaining member to be mounted in the plurality of recesses of the push wheel, a member provided with a non-rotating member and a member not provided with a rotating member can be appropriately selected. It is possible to easily change to the most appropriate detachment prevention force and rotation prevention force according to the conditions.
According to a first aspect of the present invention, there is provided a pipe joint part detachment preventing device characterized in that an outer peripheral surface of an insertion pipe part inserted and connected to the reception pipe part, and the outlet pipe part in a state of being externally mounted on the insertion pipe part. Is provided with a retaining member that can bite into the outer peripheral surface of the insertion tube portion between the inner peripheral surface of the press ring fixedly connected to the tube shaft from the tube axis direction and presses the retaining member against the outer peripheral surface of the insertion tube portion. A separation preventing device for a pipe joint portion provided with a pressing means,
Formed on the inner surface of the retaining member is a first biting projection that can bite into the outer peripheral surface of the insertion tube portion along a direction in which the component in the tube circumferential direction is the main component. A detent member provided with a second biting projection that can bite into the outer peripheral surface of the insertion tube along the direction including the component in the core direction;
The anti-rotation member is configured to be detachable with respect to the retaining member .
According to a second aspect of the present invention, there is provided a pipe joint portion disengagement prevention device that adjusts a projection margin of the second biting projection from the inner surface of the retaining member between the retaining member and the rotation preventing member. The adjustment means is provided.
According to a third aspect of the present invention, there is provided a pipe joint part detachment preventing device characterized in that the adjusting means includes a female screw of a mounting hole formed through the retaining member and a male screw formed on the outer peripheral surface of the locking member. It is composed of
According to a fourth aspect of the present invention, there is provided a characteristic configuration of the pipe joint portion detachment preventing device, wherein the receiving pipe portion is provided in an outer peripheral surface of the insertion pipe portion inserted and connected to the receiving pipe portion and externally attached to the insertion pipe portion. Is provided with a retaining member that can bite into the outer peripheral surface of the insertion tube portion between the inner peripheral surface of the press ring fixedly connected to the tube shaft from the tube axis direction and presses the retaining member against the outer peripheral surface of the insertion tube portion. A separation preventing device for a pipe joint portion provided with a pressing means,
Formed on the inner surface of the retaining member is a first biting projection that can bite into the outer peripheral surface of the insertion tube portion along a direction in which the component in the tube circumferential direction is the main component. A detent member provided with a second biting projection that can bite into the outer peripheral surface of the insertion tube along the direction including the component in the core direction;
An adjusting means for adjusting a protrusion margin of the second biting protrusion from the inner surface of the retaining member is provided between the retaining member and the rotation preventing member.
According to a fifth aspect of the present invention, there is provided a pipe joint part detachment preventing device characterized in that the adjusting means includes a female screw of a mounting hole formed through the retaining member and a male screw formed on the outer peripheral surface of the locking member. It is composed of
According to a sixth aspect of the present invention, there is provided the characteristic structure of the pipe joint portion detachment preventing device, wherein the second biting projection is annular in a direction including a component in the tube axis direction and a component in the tube circumferential direction. It is in a formed point.
According to a seventh aspect of the present invention, there is provided a characteristic configuration of the pipe joint portion detachment preventing device, wherein the receiving pipe portion is provided in an outer peripheral surface of the insertion pipe portion inserted and connected to the receiving pipe portion and externally attached to the insertion pipe portion. Is provided with a retaining member that can bite into the outer peripheral surface of the insertion tube portion between the inner peripheral surface of the press ring fixedly connected to the tube shaft from the tube axis direction and presses the retaining member against the outer peripheral surface of the insertion tube portion. A separation preventing device for a pipe joint portion provided with a pressing means,
Formed on the inner surface of the retaining member is a first biting projection that can bite into the outer peripheral surface of the insertion tube portion along a direction in which the component in the tube circumferential direction is the main component. A detent member provided with a second biting projection that can bite into the outer peripheral surface of the insertion tube along the direction including the component in the core direction;
The second biting protrusion is formed in an annular shape along a direction including a component in the tube axis direction and a component in the tube circumferential direction.
According to the eighth aspect of the present invention, there is provided a characteristic feature of the pipe joint portion detachment preventing device, wherein the retaining member is detachably attached to the inner peripheral surface of the pusher wheel and at a plurality of positions spaced apart in the pipe circumferential direction. While forming a recessed part, it exists in the point by which the said rotation prevention member is provided in at least one of the securing members with which the said recessed part is mounted | worn.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
[First Embodiment]
1 to 7 show an apparatus for preventing separation of a pipe joint portion of a fluid transport pipe (for example, a water pipe or a gas pipe), and the other fluid inserted and connected to the receiving pipe portion 1 of one fluid transport pipe P. A sealing material made of synthetic rubber (for example, styrene butadiene rubber) capable of sealing between the inner peripheral surface 1c of the receiving tube portion 1 and the outer peripheral surface 2a of the insertion tube portion 2 on the insertion tube portion 2 of the transport pipe P. 3 and a cast iron push ring 4 that can be compressed to a sealed state (watertight state) by pressing the seal material 3 from the tube axis X direction, and the push ring 4 and the receiving pipe portion 1. Fastening means 5 is provided to fasten and fix them from the direction of the tube axis X.
[0013]
The fastening means 5 is formed at bolt insertion holes 1b formed at a plurality of locations in the pipe circumferential direction of the connection flange portion 1a of the receiving pipe portion 1 and at a plurality of locations in the pipe circumferential direction of the first connection flange portion 4a of the press ring 4. Among the bolt insertion holes 4b, the T-shaped bolt 5A inserted over the bolt insertion holes 1b and 4b facing each other in the tube axis direction, and screwed into the protruding screw portion of the bolt 5A And the tube shaft of the pusher wheel 4 by the relative proximity movement of the pusher wheel 4 and the receiving pipe part 1 in the tube axis X direction accompanying the tightening operation of the bolt 5A and the nut 5B. The sealing material 3 is compressed and deformed by the seal pressing portion 4 c formed at one end portion in the core X direction, and the space between the inner peripheral surface 1 c of the receiving tube portion 1 and the outer peripheral surface 2 a of the insertion tube portion 2 is sealed.
[0014]
The pusher wheel 4 is composed of a pair of divided pusher bodies 4A divided into two in the pipe circumferential direction, and bolts 6 and nuts 7 are connected to both ends of the divided pusher wheel bodies 4A in the pipe circumferential direction. The second connecting flange portions 4d for fixedly connecting each other are integrally formed, and the outer peripheral surface 2a of the insertion tube portion 2 is bitten into a plurality of locations in the tube peripheral direction of the inner peripheral surface of each divided pusher body 4A. A recessed portion 9 is formed in which the possible retaining member 8 is movably mounted in the radial direction of the tube, and further, a pressing means for pressing the retaining member 8 mounted in each recessed portion 9 against the outer peripheral surface 2a of the insertion tube portion 2. A and cam means B are provided for displacing the retaining member 8 inward in the radial direction of the tube in accordance with the relative detachment movement of the receiving tube portion 1 and the insertion tube portion 2 in the tube axis X direction. .
[0015]
The pressing means A is formed with screw holes 10 penetrating along a direction perpendicular to the outer surface 8a of the retaining member 8 mounted in the recess 9 at a portion corresponding to each recess 9 of the divided push ring body 4A. Each screw hole 10 is configured to be detachably screwed with a push bolt 11 that presses the outer surface 8a of the retaining member 8 mounted in the recess 9 inward in the tube radial direction.
[0016]
The outer surface 8a of the retaining member 8 is formed in a tapered inclined surface that is separated from the outer peripheral surface 2a of the insertion tube portion 2 toward the distal end side of the insertion tube portion 2, and the distal end surface 11a of the push bolt 11 Is formed on a flat cam surface that is parallel or substantially parallel to the inclined outer surface 8a of the retaining member 8, and includes the inclined outer surface 8a of the retaining member 8 and the cam surface 11a of the push bolt 11 in the receiving port. The cam means B is configured to move the retaining member 8 further toward the biting side in accordance with the relative separation movement of the tube portion 1 and the insertion tube portion 2 in the tube axis X direction.
[0017]
And the 1st biting protrusion which can bite into the outer peripheral surface 2a of the insertion pipe part 2 along the pipe | tube circumferential direction is the inner side surface 8b of the said retaining member 8 and near the both ends of the pipe axis X direction. 8A is integrally formed, and the retaining member 8 has a second biting protrusion that can bite into the outer peripheral surface 2a of the insertion tube portion 2 along a direction including at least a component in the tube axis X direction. A cylindrical metal (for example, chrome molybdenum steel) 12 that is integrally formed with a rotation preventing member 12 is detachably provided. Further, a retaining member is provided between the retaining member 8 and the retaining member 12. An adjusting means C for adjusting the protrusion margin of the second biting protrusion 12 from the inner side surface 8b of the member 8 is provided.
[0018]
While the cross-sectional shape of the first biting projection 8A and the cross-sectional shape of the second biting projection 12A are each formed in a sharp triangular shape, the second biting projection 12A is It is formed in an annular shape along a direction including a component in the tube axis X direction and a component in the tube circumferential direction.
[0019]
The adjusting means C includes a female screw 8c of a mounting hole formed through the retaining member 8 along the axial direction of the bolt 11 and a male screw 12a formed on the outer peripheral surface of the rotation stopper 12. The protrusion of the second biting projection 12 from the inner side surface 8b of the retaining member 8 is adjusted by screwing the male screw 12a of the locking member 12 to the female screw 8c of the retaining member 8. Can be adjusted.
Further, a hexagonal operation hole 12b for rotating the anti-rotation material 12 with a tool is formed at the other end of the anti-rotation material 12.
[0020]
On both side surfaces in the tube circumferential direction of each retaining member 8, the retaining member 8 is engaged with the locking hole 15 formed in the side wall portion of the recess 9 corresponding thereto from the tube circumferential direction. A mounting hole 17 for a temporary fixing member 16 made of rubber or synthetic resin that is temporarily fixed and held at a predetermined mounting position is formed.
[0021]
The temporary fixing member 16 is provided when a pressing force inward in the radial direction of the tube is applied to the retaining member 8 in the recess 9 by the screwing operation of the push bolt 11 or the receiving tube portion 1 and the insertion tube portion 2. So as to allow the retaining member 8 to be forcibly moved inwardly in the radial direction of the tube when the retaining member 8 is applied with a pressing force toward the biting side along with the relative separation movement in the tube axis X direction. It is configured.
[0022]
When the retaining member 8 mounted in the recess 9 is pressed against the outer peripheral surface 2a side of the insertion tube portion 2 by the screwing operation of the pressing means A to the tightening side of the push bolt 11, the retaining member 8 is integrally formed. The two first biting projections 8A and the second biting projection 12A formed integrally with the distal end portion of the anti-rotation member 12 bite into the outer peripheral surface 2a of the insertion tube portion 2 along the pipe circumferential direction. Long and long (or along the direction in which the component in the tube circumferential direction is the main component), both the first biting protrusions 8A are connected in the direction of the tube axis X between the connected receiving tube portion 1 and insertion tube portion 2. The second bite that can exhibit a separation preventing function that prevents the relative movement of the tube and that is long along the direction including at least the component in the tube axis X direction (or long only along the tube axis X direction). The projection 12A prevents relative rotation between the receiving tube 1 and the insertion tube 2. An anti-rotation function that stops can also be exhibited.
[0023]
In addition, as shown in FIG. 7, when devices such as an air valve 20 and a fire hydrant are connected in the middle of the piping system and these devices need to be maintained in a specific posture, the first biting protrusion The stopper member 12 provided with the second biting projection 12A is attached to the retaining member 8 provided with 8A, whereby the receiving pipe portion 1 of one fluid transport pipe P and the other fluid transport pipe connected in communication with each other. It is possible to prevent both the relative detachment movement and the relative rotation in the direction of the tube axis X with respect to the insertion tube portion 2 of P, and maintain the device in a specific posture.
[0024]
In addition, when the pipe system is buried in the ground, and when external force in the pipe circumferential direction such as rotational force or twisting force is applied due to uneven settlement or earthquake, the first biting projection 8A is Inserting the receiving pipe part 1 of one fluid transport pipe P and the other fluid transport pipe P connected in communication by removing the anti-rotation member 12 provided with the second biting projection part 12A from the retaining member 8 provided. While reliably preventing the relative detachment movement from the tube portion 2, the external force in the tube circumferential direction can be absorbed by the relative rotation of the receiving tube portion 1 and the insertion tube portion 2.
[0025]
Therefore, with respect to the retaining member 8 provided with the first biting projection portion 8A, the removal prevention function and the rotation prevention function can be performed with a simple operation of simply removing the detent member 12 provided with the second biting projection portion 12A. Can be used separately, and those with only a separation prevention function.
[0026]
Further, it is not necessary to provide the anti-rotation member 12 for all the retaining members 8 held in the respective recesses 9 of the pusher wheel 4, and the anti-rotation member 12 may be provided on at least one of the retaining members 8.
[0027]
Further, as the retaining member 8 to be mounted in the plurality of recesses 9 of the push wheel 4, a member provided with the anti-rotation member 12 and a member not provided with the anti-rotation member 12 can be appropriately selected. It is possible to easily change to the most appropriate detachment prevention force and rotation prevention force according to the use conditions.
[0028]
[Second Embodiment]
In the first embodiment described above, the locking member 12 provided with the second biting projection 12A is detachably screwed into the retaining member 8 provided with the first biting projection 8A, and the first Although the two biting projections 12A are formed in an annular shape along the direction including the component in the tube axis X direction and the component in the tube circumferential direction, as shown in FIGS. A prismatic detent provided with a linear second biting projection 12A that can bite into the outer peripheral surface 2a of the insertion tube portion 2 along the tube axis X direction on the retaining member 8 provided with the projection 8A. The rectangular first mounting hole 8d that fits and holds the member 12 in a non-rotatable state and the second biting projection 12A that is fitted and held in the first mounting hole 8d are fastened and fixed to the retaining member 8. A second mounting hole 8e for mounting the bolt 21 from the outer side in the pipe radial direction may be formed in communication.
In addition, since the other structure is the same as the structure demonstrated in 1st Embodiment, the same number is attached to the same structure location as 1st Embodiment, and the description is abbreviate | omitted.
[0029]
[Other Embodiments]
(1) In each of the above-described embodiments, cam means for displacing the retaining member 8 inward in the radial direction of the tube with the relative detachment movement of the receiving tube portion 1 and the insertion tube portion 2 in the tube axis X direction. Although B is provided, the technique of the present invention may be applied to a device for preventing separation of a pipe joint portion that is not provided with such cam means B.
That is, even if the technique of the present invention is applied to the pipe joint portion separation preventing device provided with only the pressing means A that presses the retaining member 8 mounted in each concave portion 9 against the outer peripheral surface 2 a of the insertion tube portion 2. Good.
[0030]
(2) In each of the above-described embodiments, the first biting projection 8A of the retaining member 8 is formed long along the pipe circumferential direction. However, the first biting projection 8A is formed in the pipe circumferential direction. You may form long along the direction which cross | intersects.
In short, the first biting protrusion 8A of the retaining member 8 may be either continuous or intermittent, as long as it is long along the direction in which the component in the pipe circumferential direction is the main component. .
Further, the number of the first biting protrusions 8A may be one, two as in the above-described embodiment, or may be three.
[0031]
(3) In the first embodiment described above, the second biting protrusion 12A is formed in an annular shape along the direction including the component in the tube axis X direction and the component in the tube circumferential direction. In the second embodiment, the second biting protrusion 12A is formed in a straight line along the tube axis X direction, but the second biting protrusion 12A intersects the tube axis X direction. A straight line or a curved line may be formed.
In short, the second biting projection 12A may be either continuous or intermittent, but as long as it is long in the direction including at least the component in the tube axis X direction.
[0032]
(4) The tip of each of the first biting projections 8A and the second biting projections 12A is formed into a corrugated shape or an inclined shape with a protruding amount that increases toward one end in the longitudinal direction. Also good.
[0033]
(5) In each of the above-described embodiments, the locking member 12 having the second biting protrusion 12A is configured to be detachable with respect to the retaining member 8 having the first biting protrusion 8A. Although the method is adopted, it may be configured to be detachable by a fitting method instead of such a screw method.
[0034]
(6) After the retaining member 8 provided with the first biting projection 8A and the locking member 12 provided with the second biting projection 12A are separately manufactured, the locking member 12 is used as the locking member 8. It may be carried out by fixing with an appropriate fixing means.
[Brief description of the drawings]
FIG. 1 is a cross-sectional side view of a pipe joint detachment preventing device showing a first embodiment of the present invention. FIG. 2 is a cross-sectional front view. FIG. Fig. 5 is an exploded exploded perspective view of the retaining member and the locking member. Fig. 6 is an enlarged inner side view of the retaining member and the locking member. Fig. 7 is a side view showing an example of the piping system. 8] Enlarged partially cutaway front view of the pipe joint part detachment preventing device showing the second embodiment of the present invention. [FIG. 9] Enlarged inner side view of the retaining member and the rotation preventing member. [FIG. 10] Conventional pipe joint part. FIG. 11 is a cross-sectional side view showing a device for preventing the separation of the member.
A Pressing means C Adjusting means X Tube axis 1 Receiving tube portion 2 Insertion tube portion 2a Outer peripheral surface 4 Push ring 8 Retaining member 8A First biting projection portion 8c Female screw 12 Non-rotating member 12A Second biting projection portion 12a Male screw

Claims (8)

Between the outer peripheral surface of the insertion tube portion inserted and connected to the receiving tube portion, and the inner peripheral surface of the press ring fixedly connected to the receiving tube portion from the tube axis direction in a state of covering the insertion tube portion. An apparatus for preventing separation of a pipe joint portion provided with a retaining member capable of biting on the outer peripheral surface of the insertion tube portion and provided with pressing means for pressing the retaining member against the outer peripheral surface of the insertion tube portion,
Formed on the inner surface of the retaining member is a first biting projection that can bite into the outer peripheral surface of the insertion tube portion along a direction in which the component in the tube circumferential direction is the main component. Oh Ri provided detent member having a second biting projections capable bite the outer circumferential surface of the insertion tube portion along a direction including the center direction component,
An apparatus for preventing separation of a pipe joint, wherein the anti- rotation member is configured to be detachable with respect to a retaining member . 2. The apparatus for preventing separation of a pipe joint part according to claim 1, wherein an adjusting means for adjusting a protrusion margin of the second biting projection part from the inner side surface of the retaining member is provided between the retaining member and the rotation preventing member. . 3. The apparatus for preventing detachment of a pipe joint portion according to claim 2, wherein the adjusting means comprises a female screw of an attachment hole formed through the retaining member and a male screw formed on the outer peripheral surface of the non-rotating member . Between the outer peripheral surface of the insertion tube portion inserted and connected to the receiving tube portion, and the inner peripheral surface of the press ring fixedly connected to the receiving tube portion from the tube axis direction in a state of covering the insertion tube portion. An apparatus for preventing separation of a pipe joint portion provided with a retaining member capable of biting on the outer peripheral surface of the insertion tube portion and provided with pressing means for pressing the retaining member against the outer peripheral surface of the insertion tube portion,
Formed on the inner surface of the retaining member is a first biting projection that can bite into the outer peripheral surface of the insertion tube portion along a direction in which the component in the tube circumferential direction is the main component. A detent member provided with a second biting projection that can bite into the outer peripheral surface of the insertion tube along the direction including the component in the core direction;
An apparatus for preventing detachment of a pipe joint portion, wherein an adjusting means for adjusting a projection allowance of a second biting protrusion from an inner surface of the retaining member is provided between the retaining member and the rotation preventing member . 5. The apparatus for preventing separation of a pipe joint portion according to claim 4, wherein the adjusting means comprises a female screw of an attachment hole formed through the retaining member and a male screw formed on the outer peripheral surface of the non-rotating member . The pipe joint according to any one of claims 1 to 5, wherein the second biting protrusion is formed in an annular shape along a direction including a component in the tube axis direction and a component in the tube circumferential direction. Departure prevention device. Between the outer peripheral surface of the insertion tube portion inserted and connected to the receiving tube portion, and the inner peripheral surface of the press ring fixedly connected to the receiving tube portion from the tube axis direction in a state of covering the insertion tube portion. In addition to providing a retaining member capable of biting on the outer peripheral surface of the insertion tube portion, and a device for preventing the separation of the pipe joint portion provided with pressing means for pressing the retaining member against the outer peripheral surface of the insertion tube portion,
Formed on the inner surface of the retaining member is a first biting projection that can bite into the outer peripheral surface of the insertion tube portion along the direction in which the component in the tube circumferential direction is the main component. A detent member provided with a second biting projection that can bite into the outer peripheral surface of the insertion tube along the direction including the component in the core direction;
The apparatus for preventing separation of a pipe joint portion in which the second biting protrusion is formed in an annular shape along a direction including a component in the tube axis direction and a component in the tube circumferential direction. At least one of the retaining members attached to the recesses is formed on the inner peripheral surface of the press ring and at a plurality of locations spaced apart from each other at a predetermined interval in the pipe circumferential direction by forming recesses to which the retaining members are detachably attached. 8. The apparatus for preventing separation of a pipe joint according to any one of claims 1 to 7, wherein the anti-rotation member is provided.

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