WO2011043113A1 - 離脱防止機能付きシール材および離脱防止管継手 - Google Patents
離脱防止機能付きシール材および離脱防止管継手 Download PDFInfo
- Publication number
- WO2011043113A1 WO2011043113A1 PCT/JP2010/061003 JP2010061003W WO2011043113A1 WO 2011043113 A1 WO2011043113 A1 WO 2011043113A1 JP 2010061003 W JP2010061003 W JP 2010061003W WO 2011043113 A1 WO2011043113 A1 WO 2011043113A1
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- WIPO (PCT)
- Prior art keywords
- sealing material
- insertion port
- elastic body
- claw portion
- claw
- Prior art date
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L37/00—Couplings of the quick-acting type
- F16L37/08—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members
- F16L37/084—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking
- F16L37/0845—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking by means of retaining members associated with the packing member
Definitions
- the present invention relates to a detachment prevention pipe joint that prevents the pipes connected to each other from detaching, and a seal material with a detachment prevention function used for the detachment prevention pipe joint.
- pipes are constructed by connecting a plurality of ductile cast iron pipes or the like as water pipes laid in the ground.
- a deformed pipe such as a curved pipe or a T-shaped pipe
- the pipe is connected by water pressure at a bent portion or a branched portion (that is, a location where the water flow direction is changed).
- a force (non-average force) to be moved acts. Therefore, a disconnection preventing function for preventing the pipes from being separated from each other even when such an unbalanced force is applied is added to the connection portion of the deformed pipe.
- FIG. 23 As one conventional structure for preventing the detachment of the pipe, as shown in FIG. 23, a joint (joint) between a deformed pipe (bent pipe in FIG. 23) 51 and pipes 52 and 53 connected to the deformed pipe 51. Part) 54 and a structure covered with a concrete block 55 (referred to as a concrete block structure) is used. That is, the pipes 52 and 53 and the deformed pipe 51 are integrated by the concrete block 55 in this way, thereby preventing the pipes 52 and 53 and the deformed pipe 51 from being detached.
- FIGS Another structure for preventing the separation of the pipe is shown in FIGS.
- lock ring receiving grooves 66 and 67 for disposing the lock ring 65 are formed on the inner peripheral surface of the receiving port 63 and the outer peripheral surface of the insertion port 64 of the pipes 61 and 62, A lock ring 65 divided in one direction is provided. Further, after the pipes 61 and 62 are joined, the lock ring 65 is pressed inward in the pipe radial direction by a set bolt 68 that penetrates the receiving port 63 in the pipe radial direction, thereby preventing the lock ring 65 from expanding. The pipes 61 and 62 are prevented from being detached via the lock ring 65.
- a seal material (hereinafter referred to as a seal material with a detachment prevention function or simply referred to as a seal material) 70 provided with a detachment prevention function as shown in FIGS. It has been proposed to be provided in a detachment prevention pipe joint. That is, not only the elastic sealing material body 78 is disposed in the sealing material housing groove 72 formed in the inner peripheral surface of the receiving port 71, but also the claw portions 73a and 73b on the inner peripheral portion of the sealing material main body 78. The lock body 73 formed with is embedded. Then, as shown in FIG.
- a curved groove 73 c that abuts on the receiving port inner protrusion 76 formed in the sealing material receiving groove 72 of the receiving port 71 is formed in a concave shape on the outer peripheral portion of the lock body 73.
- the entire lock body 73 is rotated in the d direction while deforming the sealing material main body 78 so that the claw portion 73a of the lock body 73 is pushed outward from the outer peripheral surface of the insertion opening 75 by the insertion force of the insertion opening 75.
- the insertion of the insertion opening 75 inside the lock body 73 is allowed.
- a seal material 70 with a detachment prevention function in which the lock body 73 is embedded is prepared in advance, and the seal material 70 is placed in the receiving port 71. All you need to do is arrange. This eliminates the need for a diameter reduction jig and equipment, and also eliminates the need for a diameter reduction operation of the lock ring, thereby saving labor and time for the diameter reduction operation.
- the present invention solves the above-mentioned problems, and can perform the joining operation of the tubes easily and in a short time, and when inserting the insertion port into the receiving port to join the tubes together, the claw portion of the lock body It is an object of the present invention to provide a separation preventing pipe joint and a sealing material with a separation preventing function that do not damage the outer peripheral surface of the insertion opening.
- the sealing material with a detachment preventing function of the present invention has an insertion formed at the end of the other tube inside the receiving port formed at the end of one of the tubes joined together.
- a seal member for sealing between the elastic seal member and a lock body for preventing detachment is embedded in an elastic and compressible annular seal member body, and the lock member is inserted into the receiving port.
- a claw portion that bites into the outer peripheral surface of the insertion opening is formed when the plug is about to come out, and the claw portion comes into contact with the outer peripheral surface of the insertion opening when the insertion opening is inserted into the sealing material.
- An elastic body for rotation that rotates the lock body in a direction away from the rotation body is provided. It is preferable that a plurality of claw portions are formed in the lock body in the tube axis direction, and an elastic body for rotation is provided in the vicinity of the claw portion near the opening of the receiving opening.
- the elastic body for rotation of the sealing material with a separation preventing function of the present invention is disposed so as to protrude inward in the pipe radial direction at a place where at least a part of the claw portion of the lock body is removed.
- the lock body can be rotated when the insertion opening is inserted, and the claw portion can be separated from the outer peripheral surface of the insertion opening. That is, when the claw portion is provided and the rotation elastic body is disposed so as to cover the claw portion or the vicinity of the claw portion, the claw portion causes the rotation elastic body to be inserted when the insertion opening is inserted.
- the rotating elastic body has an inclined surface portion whose cross-sectional shape increases by a certain amount from the inner peripheral surface portion of the seal material main body toward the inner side in the tube axial direction, and a deeper portion in the tube axial direction of the inclined surface portion. You may comprise so that it may have a thick planar surface part which becomes a thick planar shape on the end side.
- the elastic body for rotation has a curved inclined surface portion that has a cross-sectional shape that increases so that a protrusion increase amount inward in the tube radial direction increases toward the inner side in the tube axis direction, and the curved inclined surface portion And having a thick flat surface portion that smoothly follows the thick wall portion at the back end in the tube axis direction, and when the insertion port is inserted, the distal end portion of the insertion port first comes into contact with the thin protruding portion of the curved inclined surface portion. Good.
- Such a detachment prevention pipe joint has a structure that allows the insertion of the insertion opening by rotating the lock body by deforming the seal material during insertion of the insertion opening, and therefore requires a relatively large force when inserting the insertion opening. .
- the rotation elastic body By providing the rotation elastic body, it is possible to prevent the outer peripheral surface of the insertion opening from being damaged by the claw when inserting the insertion opening, but the rotation elastic body abuts on the outer peripheral surface of the insertion opening during insertion. This will require even greater power.
- the curved shape of the rotating elastic body increases such that the cross-sectional shape increases from the inner peripheral surface portion of the sealing material main body toward the inner side in the tube radial direction toward the inner side in the tube axial direction.
- the increase in insertion force of the insertion port at this time can be minimized. it can.
- the cross-sectional shape of the curved inclined surface portion of the elastic body for rotation is a curved shape, if the insertion port is continuously inserted when the insertion port is inserted, the sealing material is smoothly deformed according to the protruding amount of the rotation elastic body. The lock body is rotated satisfactorily. Eventually, the insertion port comes into contact with the thick flat surface portion of the elastic body for rotation, and the claw portion of the lock body is separated from the outer peripheral surface. Can be more reliably prevented.
- the sealing material with a detachment preventing function of the present invention is a lock body that is rotated by an elastic body for rotation at the time of insertion of the insertion opening on the surface of the receiving end portion side following the tip portion of the claw portion.
- a protective material is provided that prevents the claw portion from abutting against the outer peripheral surface of the insertion opening or reduces the abutting force.
- the lock body when the rotation elastic body is only provided on the lock body, the lock body is rotated in the direction in which the claw portion is separated from the outer peripheral surface of the insertion opening when the insertion opening is inserted by the rotation elastic body. Regardless, there is a possibility that the claw portion may come into contact with the outer peripheral surface of the insertion port and be damaged when the insertion port is inserted because the interval between the outer peripheral surface of the insertion port and the receiving port is extremely small.
- a protective member on the lock body it is possible to prevent or reduce the force of the lock body to prevent or contact the claw portion of the lock body with the outer peripheral surface of the insertion slot. Therefore, it is possible to more reliably prevent or minimize the damage to the outer peripheral surface of the insertion opening due to the claw when inserting the insertion opening.
- the protective material may be formed on the inner surface of the corresponding nail portion in the tube radial direction in a thin shape with a substantially constant thickness, but if necessary, the nail portion on which the protective material is disposed.
- a thick part may be provided on the inner surface in the pipe radial direction in the vicinity of the tip part, and the thick part of the protective material may be formed in an area narrower and smaller than the claw part.
- the protection material can be used. If the inner surface of the claw portion is simply formed in a thin shape with a substantially constant thickness, the protective function by the protective material becomes insufficient, and the outer peripheral surface of the insertion opening may be damaged by the claw portion. In order to cope with this, if the protective material is formed with a substantially constant thickness, it is possible to prevent the outer peripheral surface of the insertion slot from being damaged by the claw, but the protective material is more strongly applied to the outer peripheral surface of the insertion opening during insertion. In contact, it will require even greater power.
- the thick part of the protective material is formed only in a region that is narrower and smaller than the claw part, it is possible to prevent the claw part from damaging the outer peripheral surface of the insertion opening, Since it becomes easy to deform
- the protective material is formed up to the tip of the corresponding nail part or near the tip part, the protective material may enter between the nail part and the outer peripheral surface of the insertion opening to protect the case. The material may be cut, and in this case, a large force may be required to insert the insertion opening.
- the protective material in contrast, by forming the protective material so that there is a gap between the claw portion and the protective material, the protective material enters between the claw portion and the outer peripheral surface of the insertion port when the insertion port is inserted. Can be prevented, and the force required to insert the insertion opening can be reduced.
- the elastic body for rotation is disposed at both ends with respect to the width direction of the lock body along the circumferential direction of the tube in the lock body, and the protective material is provided.
- a claw portion is formed between the elastic bodies for rotation, or the elastic body for rotation is disposed at a central portion with respect to the width direction of the lock body along the circumferential direction of the tube in the lock body, and a protective material is provided. What is necessary is just to arrange
- the sealing material main body and the rotating elastic body can be integrally formed.
- the elastic body for rotation may be formed of a material different from that of the seal material body or a material having a hardness different from that of the seal material body.
- the rotating elastic body that rotates the lock body in the direction in which the claw portion separates from the outer peripheral surface of the insertion opening by contacting the outer peripheral surface of the insertion opening when the insertion opening is inserted is provided. Accordingly, when the insertion port is inserted, the lock body is rotated by the rotating elastic body, the claw portion of the lock body is rotated in a direction away from the outer peripheral surface of the insertion port, and the outer peripheral surface of the insertion port is damaged by the claw portion. Can be prevented. As a result, the pipe can be joined easily and in a short time, and the outer peripheral surface of the insertion port is not damaged. Therefore, even when the pipe joint having this sealing material is used as a water pipe, etc. The possibility of corrosion during water and the like can be minimized, and good reliability can be maintained.
- the function of preventing the outer peripheral surface of the insertion opening from being damaged by the claw portion by disposing the elastic body for rotation in a place where at least a part of the claw portion of the lock body is removed. Can be obtained more reliably.
- a curved inclined surface portion that increases so that the amount of increase in protrusion in the tube radial direction increases toward the inner side in the tube axis direction is formed on the elastic body for rotation, and the distal end portion of the insertion port is first curved inclined surface portion when the insertion port is inserted. It is possible to prevent the claw portion from damaging the outer peripheral surface of the insertion port, and at the same time minimize the increase in insertion force of the insertion port when inserting the insertion port. it can. Therefore, if the insertion force of the insertion opening becomes extremely large when inserting the insertion opening, a special joining jig may be required. It is not necessary, and the workability of the joining work can be improved and the equipment cost can be reduced.
- a thick portion is provided on the inner surface in the pipe radial direction in the vicinity of the tip of the claw portion where the protective material is disposed, and the thick portion of the protective material is formed in a narrower and smaller area than the claw portion.
- FIG. 12B It is the XIIIB-XIIIB arrow directional cross-sectional view in FIG. 12B of the lock body of the sealing material with the said separation
- FIG. 17 is an enlarged cross-sectional view of a main part illustrating a state in which a protective material has entered the separation preventing pipe joint illustrated in FIGS. 12 to 16. It is a figure which shows schematically the conventional detachment
- FIGS. 5A and 5B are just before the insertion port is inserted.
- 6A and 6B show the state where the tip of the insertion port is being inserted
- FIGS. 7A and 7B show the state where the insertion port is inserted
- FIG. 8 shows that the insertion port is detached from the receiving port. Indicates the state when trying.
- FIGS. 4A and 4B are FIG. 4 is a cross-sectional view taken along line IVA-IVA and a cross-sectional view taken along line IVB-IVB in FIG. 3B of the lock body, the elastic body for rotation, and the protective material of the sealing material with the separation preventing function.
- a detachment prevention pipe joint 1 has a receiving port 3 formed at an end portion of one pipe 2 to be joined to the end of the other pipe 4.
- the insertion slot 5 formed in the part is inserted.
- An annular sealing material 7 is disposed in a sealing material receiving groove 6 formed in the inner periphery of the receiving port 3 (specifically, the inner periphery of the portion on the back side of the tube end surface 3a of the receiving port 3).
- the sealing material 7 is compressed between the port 3 and the insertion port 5 to seal the insertion port.
- 5a in FIG. 1 is the inclined surface of the insertion port 5 formed in the outer periphery of the front-end
- the sealing material 7 provided in the separation preventing pipe joint 1 has a separation preventing function for preventing the mutually connected tubes 2 and 4 from separating.
- the pipes 2 and 4 are made of, for example, ductile cast iron, but are not limited thereto.
- the sealing material 7 includes a heel portion (a collar portion) 7a that holds the sealing material 7 at a predetermined position in the sealing material accommodation groove 6 and a valve portion 7b that performs a seal between the insertion port.
- the valve portion 7b has a substantially circular cross section (or a substantially elliptical cross section) in a state where no external force is applied.
- a part receiving groove 6b is formed.
- a receiving port inner surface protruding portion 8 that protrudes inward (inner side in the pipe diameter direction).
- the material 7 is also formed with a curved groove portion 7c that is slidably in contact with the receiving port inner surface protruding portion 8.
- the end portion of the receiving-portion inner surface protruding portion 8 has a substantially semicircular cross section, but is not limited to this shape.
- the sealing material 7 is a release material formed of a highly rigid material such as a metal piece on an annular sealing material main body 9 made of elastic and compressible rubber.
- a plurality of prevention locking bodies 10 are embedded in the circumferential direction at intervals.
- the case where the eight lock bodies 10 are arranged at equal intervals in the circumferential direction is illustrated, but the number of the lock bodies 10 is increased or decreased, and the lock bodies 10 are arranged accordingly. The interval may be changed.
- the lock body 10 has an insertion port when the insertion port 5 is about to come out of the receiving port 3, that is, when the tubes 2 and 4 are about to move away from each other.
- the claw portions 10a and 10b that bite into the outer peripheral surface of the tube 5 are received when the insertion port 5 is inserted into the reception port 3 and the tubes 2 and 4 are joined to each other.
- a curved groove portion 10 c that can be slidably contacted with the receiving-portion inner surface protruding portion 8 is formed.
- the claw portions 10a and 10b are formed so as to protrude obliquely from the lock body 10 to the inside of the seal member 7, more specifically, to the inner side of the receiving port 3 and the inner side in the pipe diameter direction.
- each lock body 10 is formed so that two claw portions 10a and 10b are arranged in the tube axis direction.
- three or more claw portions 10a and 10b may be arranged in the tube axis direction.
- the claw part (also referred to as the back claw part) 10a on the back side from the opening end of the receiving port 3 is
- the width direction of the lock body 10 is formed over the circumferential direction of the pipe in which the receiving port 3 and the like are formed.
- the claw portions (also referred to as opening claw portions) 10b near the opening end of the receiving port 3 are formed so as to remain only in the center portion in the width direction of the lock body 10, and both end portions of the lock body 10 in the width direction.
- the claw portions 10b near the opening are removed by cutting or the like at the side portions, and the removed portions that have been cut off have the same elasticity as the sealing material body 9 made of, for example, rubber.
- An elastic body 11 for rotation is integrally formed with the seal material main body 9.
- the rotating elastic body 11 may be formed by any method, and may be created separately from the sealing material main body 9 and attached to the cut portion of the opening-side claw portion 10b.
- the rotating elastic body 11 abuts against the outer peripheral surface of the insertion slot 5 when the insertion slot 5 is inserted, and the claw portions 10a, 10b of the lock body 10 are inserted into the insertion slot 5.
- the rotation elastic body 11 is provided in a state of projecting inward in the tube radial direction from the opening-side claw portion 10b.
- the elastic body 11 for rotation is a state where the external force does not act, and the cross-sectional shape of the rotating elastic body 11 is from the inner peripheral surface portion 9a of the seal body 9 toward the tube axis direction in the tube diameter direction as shown in FIG.
- the elastic body 11 for rotation is integrally formed with the seal material body 9 as described above, but the thickness combined with the seal material body 9 is a lock body as shown in FIG. 4A and the like. It is formed so as to have almost the same thickness from 10 toward the inside in the tube diameter direction.
- the surface on the receiving end side (the surface facing the inner side in the pipe radial direction) following the tip of the portion where the opening-side claw portion 10b of the lock body 10 is formed. ) Is a constant that prevents or reduces the force of contact of the claw portion 10b near the opening of the lock body 10 rotated by the elastic body 11 for rotation with the outer peripheral surface of the insertion opening 5 when the insertion opening 5 is inserted.
- a protective material 12 made of a thin rubber plate (for example, 1 mm thick) or the like is integrally formed with the seal material main body 9. Any method may be used to form the protective material 12, and the protective material 12 may be created separately from the seal material body 9 and attached to the opening-side claw portion 10 b.
- the sealing material 7 is inserted into the sealing material accommodation groove 6 of the receiving port 3. Since it is only attached, the valve portion 7b of the sealing material 7 is in a posture that swells greatly inward in the pipe radial direction, as shown in FIGS. 2, 5A, and 5B. Accordingly, the lock body 10 also has a posture closer to the inner side in the tube radial direction (lower side of the paper surface in FIG. 2 and the like) than when the insertion port 5 described later is inserted, and the claw portions 10a, 10b is the attitude
- a sealing material is provided on the inclined surface 5 a of the insertion port 5. 7 (the inner portion in the pipe diameter direction) is in contact, and further, as shown in FIGS. 7A and 7B, the inner side of the sealing material 7 is in contact with the outer peripheral surface of the insertion port 5.
- the claw portions 10a and 10b of the lock body 10 protrude inside the seal material 7, but the claw portion (opening claw portion) 10b of the lock body 10 protrudes further than the claw portion 10b.
- the rotating elastic body 11 Since the rotating elastic body 11 is provided, the rotating elastic body 11 comes into contact with the inclined surface 5a and the outer peripheral surface of the insertion slot 5, and the rotating elastic body 11 is also inserted along with the insertion operation of the insertion slot 5. A force is applied in the insertion direction of the mouth 5. Thereby, the lock body 10 of the sealing material 7 is in the e direction, that is, the direction in which the claw portions 10 a and 10 b are separated from the outer peripheral surface of the insertion port 5 in a state where the curved groove portion 10 c is in sliding contact with the receiving port inner surface protruding portion 8. Rotate to.
- the claw portions 10a and 10b can be prevented from coming into contact with the outer peripheral surface of the insertion port 5 when the insertion port 5 is inserted, and the outer peripheral surface of the insertion port 5 can be prevented from being damaged by the claw portions 10a and 10b.
- the claw portions 10 a and 10 b of the insertion opening 5 are inserted when the insertion opening 5 is inserted by the rotation elastic body 11. Even though the lock body 10 is rotated in the direction away from the outer peripheral surface, the distance between the outer peripheral surface of the insertion port 5 and the receiving port 3 is very small. There is a possibility that the claw portion 10b may come into contact with the outer peripheral surface of the insertion slot 5 at the time of insertion.
- the protective material 12 in the form of a thin plate is provided on the surface on the receiving end portion side following the tip portion of the claw portion 10b.
- the protective material 12 contacts the outer peripheral surface of the insertion slot 5, thereby preventing the claw portions 10 a and 10 b of the lock body 10 from coming into contact with the outer peripheral surface of the insertion slot 5.
- the abutting force can be reduced. Therefore, it is possible to more reliably prevent or minimize the damage to the outer peripheral surface of the insertion slot 5 by the claw portions 10a and 10b when the insertion slot 10 is inserted.
- the claw portion (opening claw portion) 10b is removed at the place where the elastic body 11 for rotation is disposed, so that the claw portion 10b remains (is left). ),
- the lock body 10 is rotated well when the insertion slot 5 is inserted, and the claw portions 10a and 10b are inserted into the insertion slot 5. It can be separated from the outer peripheral surface.
- the rotating elastic body 11 is connected to the receiving end portion side following the distal end portion of the portion where the claw portion 10 b is formed while the claw portion (opening claw portion) 10 b is provided.
- the elastic body 11 for rotation is the outer periphery of the claw portion 10b and the insertion opening 5 when the insertion opening 5 is inserted. If it inserts the insertion slot 5 without applying a very large force when inserting the insertion slot 5, it will not be inserted, and a special jig is required and a large expensive equipment cost is required.
- the rotating elastic body 11 is provided with the claw portion (opening claw portion) 10b being provided, the above-described problems occur.
- the rotating elastic body 11 is Since the claw portion 10b is removed at the place where it is disposed, the above-mentioned problems do not occur, and the lock body 10 is rotated well when the insertion port 5 is inserted, and the claw portions 10a, 10b are inserted into the insertion port 5. It is possible to move away from the outer peripheral surface.
- the elastic body 11 for rotation is placed at a position corresponding to the claw portion (opening claw portion) 10b of the lock body 10.
- the claw portions 10b provided with the protective member 12 are formed between the elastic bodies 11 for rotation, which are respectively disposed at both ends with respect to the width direction of the lock body 10 along the circumferential direction of the tubes 2 and 4 in FIG.
- the elastic body 11 for rotation is in good contact with the outer peripheral surface of the insertion slot 5 on both sides of the claw portion 10b and the lock body 10 is rotated, and the claw portion 10b is the outer peripheral surface of the insertion slot 5.
- the insertion port 5 tries to detach
- the elastic body for rotation 11 moves to the receiving opening end side with the insertion opening 5 and the lock body 10 rotates in the h direction, not the opening side claw portion 10b of the lock body 10 but the back The side nail
- the elastic body 11 for rotation and the protective material 12 are not provided in the portion corresponding to the back claw portion 10 a, and thus there is a gap between the receiving port 3 and the insertion port 5.
- the insertion port 5 is inserted into the receiving port 3 in order to join the tubes 2 and 4 in a wide (large) case, as shown in FIG. 11B, the back side claw portion 10a of the lock body 10 is inserted. It contacts the outer peripheral surface of the mouth 5.
- the rotation angle (rotation amount) of the lock body 10 in the i direction may be small and the compression amount of the sealing material 7 (sealing material body 9) is small. There is no scratch.
- the outer peripheral surface of the insertion port 5 is prevented from being damaged when the gap between the receiving port 3 and the insertion port 5 is narrow. It is only necessary to have the claw portion 10b near the opening that may come into contact with the same (the same applies when there are three or more claw portions).
- FIGS. 12A, 12B, 13A to 13C show a rotating elastic body 11 according to another embodiment.
- the rotating elastic body 11 is shown in FIG. 12A.
- the curved inclined surface portion 11c and the thick flat surface portion 11b are formed in a substantially trapezoidal cross-sectional shape.
- the curved inclined surface portion 11c increases in the cross section so that the amount of increase in the protrusion inward in the tube radial direction increases from the inner peripheral surface portion of the sealing material body 9 toward the inner side in the tube axis direction (that is, in the tube axis direction).
- the amount of protrusion and the amount of increase in protrusion are small, and the amount of protrusion and the amount of increase in protrusion increase toward the back in the tube axis direction. So as to bend in a concave shape).
- the thick flat surface portion 11b smoothly follows the thick wall portion of the end portion on the far side in the tube axis direction of the curved inclined surface portion 11c. Then, as shown in FIGS.
- the rotating elastic body 11 is integrally formed with the sealing material body 9, but as shown in FIG. 13A, the thickness combined with the sealing material body 9 is curved from the lock body 10 toward the inside in the radial direction of the tube. It is formed so as to be thinnest at the central portion of the inclined surface portion 11c and thick at the portion of the thick surface portion 11b.
- the rotating elastic body 11 has an inclined surface portion 11a in which the protruding amount increases by a certain amount from the inner peripheral surface portion of the sealing material main body 9 in the cross section toward the inner side in the tube axis direction.
- the protrusion increase amount of the rotation elastic body 11 is relatively large. A large force is required as the insertion force of 5, and the work efficiency is lowered, and in some cases, a special joining jig may be required.
- the cross-sectional shape is closer to the inner side in the pipe axis direction
- the elastic body for rotation 11 abuts against a thin protruding portion of the curved inclined surface portion 11c (a portion closer to the outside of the curved inclined surface portion 11c), and the protruding amount of this portion is small, and the protruding amount increases smoothly thereafter.
- An increase in insertion force of the insertion slot 5 can be minimized. Therefore, the workability when inserting the insertion slot 5 can be improved, and a special joining jig is not required and a general joining jig can be used, so that the equipment cost can be reduced. it can.
- the section of the rotating elastic body 11 where the curved inclined surface portion 11c is provided is a curved shape, and the curved inclined surface portion 11c is formed so as to smoothly follow the thick surface portion 11b. If the insertion slot 5 is continuously inserted at the time of mouth insertion, the thick wall surface portion 11b eventually comes into contact with the insertion slot and the outer peripheral surface of the insertion slot 5 is damaged by the claw portions 10a and 10b while being smoothly inserted. Can be prevented more reliably.
- the protective material 12 is formed in a thin shape with a substantially constant thickness on the inner surface (inner side in the tube diameter direction) of the corresponding claw portion (opening claw portion) 10b.
- FIGS. 12A to 16C show another embodiment.
- the tip portion of the claw portion (opening claw portion) 10b in which the protection material 12 is disposed in the protection material 12 is shown.
- a thick portion 12a is provided on the inner surface (inner side in the pipe radial direction) in the vicinity, and the thick portion 12a of the protective material 12 is narrower and smaller than the claw portion 10b (a short length dimension). Is formed.
- the case where the thick part 12a and the thin part 12b of the protective material 12 are formed so as to continue smoothly is shown, but the present invention is not limited to this.
- a protective material 12 having a structure having a simple thickness is used, depending on the shape of the claw portion 10b, the protective function of the protective material 12 may be insufficient, and the claw portion 10b may be inserted during insertion.
- the outer peripheral surface of the insertion slot 5 may be damaged.
- the entire protective member 12 is formed thick, it is possible to prevent the outer peripheral surface of the insertion slot 5 from being damaged by the claw portion 10b, but the protective member 12 is stronger than the outer peripheral surface of the insertion opening during insertion. Since it abuts, an extremely large force is required.
- the outer peripheral surface of the insertion opening 5 is damaged by the claw portion 10b by forming the thick portion 12a of the protective material 12 with a narrower and smaller dimension than the claw portion 10b. Not only can this be prevented, but since the region where the thick portion 12a is formed is small, the thick portion 12a is easily deformed with a relatively small force, and the increase in the required insertion force of the insertion port 5 during insertion is minimized. To the limit.
- FIGS. 1 to 9 and FIGS. 11A to 16C the case where the protective material 12 is provided almost to the vicinity of the tip of the claw portion (opening claw portion) 10b has been described.
- 17A to 21C show still another embodiment.
- the protective material 12 is not provided near the tip of the claw portion (opening claw portion) 10b.
- the protective material 12 is formed with a gap S between the claw portion 10 b and the protective material 12.
- FIGS. 17A to 21C show the case where the protective material 12 is not provided only in the portion corresponding to the thick portion 12a of the protective material 12, the present invention is not limited to this, and the claw portion 10b is provided.
- the protective material 12 is provided near the tip of the claw part 10b. It may be configured such that a gap is formed between the claw portion 10b and the protective material 12 without providing a gap.
- the protective material 12 extends to the tip of the claw portion (opening claw portion) 10b. If provided, as shown in FIG. 22, in some cases, when the insertion slot 5 is inserted, between the claw part 10 b and the outer peripheral surface of the insertion slot 5, in the vicinity of the tip of the claw part 10 b in the protective material 12. The portion 12 ′ may enter, and the tip portion vicinity portion 12 ′ of the protective material 12 may be cut. At this time, the protective member 12 can prevent the claw portion 10b from damaging the outer peripheral surface of the insertion slot 5.
- the protective material 12 so as to have a gap S between the claw portion 10b and the protective material 12, when the insertion port 5 is inserted, the claw portion 10b and the outer peripheral surface of the insertion port 5 It is possible to prevent the protective material 12 from entering between them, reduce the force required to insert the insertion slot 5, and improve the work efficiency.
- the elastic body 11 for rotation is disposed at both ends in the width direction of the lock body 10, and the claw portion (opening claw portion) 10b provided with the protective material 12 is rotated.
- the case where the elastic member 11 is formed between the elastic members 11 has been described.
- the present invention is not limited to this.
- the rotating elastic member 11 is disposed in the center of the lock member 10 in the width direction, and the protective member 12 is provided. You may arrange
- the sealing material 7 can be formed by integral molding. There is an advantage that can be made, and the manufacture of the sealing material 7 becomes easy.
- the present invention is not limited to this, and the rotating elastic body 11 and the protective material 12 may be formed of a material having a hardness different from that of the seal material body 9 or a different material such as a resin.
- the shape of the elastic body for rotation 11 and the protective material 12 can be freely set. There is an advantage that it can be determined and an optimum design is possible, and in some cases, there is an advantage that it can be produced at a lower cost than the case of forming the same material.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
- Joints With Sleeves (AREA)
- Joints Allowing Movement (AREA)
Abstract
Description
Claims (14)
- 互いに接合される一方の管の端部に形成された受口の内部に、他方の管の端部に形成された挿口が挿入される離脱防止管継手に用いられ、受口の内周に形成されたシール材収容溝に配設されて、受口と挿口との間で圧縮されることで挿口受口間のシールを行うシール材であって、
弾性を有して圧縮可能な環状のシール材本体に、離脱防止用のロック体が埋設されており、
前記ロック体に、受口に対して挿口が抜け出ようとする際に挿口の外周面に食い込む爪部が形成されており、
当該シール材に、挿口の挿入時に挿口の外周面に当接して前記爪部が挿口の外周面から離反する方向にロック体を回転させる回転用弾性体が設けられている
ことを特徴とする離脱防止機能付きシール材。 - ロック体において爪部が管軸心方向に対して複数形成され、受口開口端寄りの爪部近傍に、回転用弾性体が設けられていることを特徴とする請求項1記載の離脱防止機能付きシール材。
- 回転用弾性体は、ロック体における爪部の少なくとも一部が除かれた箇所において管径方向内側に突出するように配設されていることを特徴とする請求項1または2に記載の離脱防止機能付きシール材。
- 回転用弾性体が、その断面形状がシール材本体の内周面部から管軸方向奥側ほど管径方向内側への突出量が一定量ずつ増加する傾斜面部と、この傾斜面部の管軸方向奥端側に厚肉平面形状となって続く厚肉平面部とを有することを特徴とする請求項3に記載の離脱防止機能付きシール材。
- 回転用弾性体が、その断面形状が管軸方向奥側ほど管径方向内側への突出増加量が大きくなるように増加して湾曲形状に傾斜する湾曲傾斜面部と、この湾曲傾斜面部の管軸方向奥側端部の厚肉部分に滑らかに続く厚肉平面部とを有する形状とされ、挿口挿入時に挿口先端部がまず湾曲傾斜面部の薄肉突出部分に当接するよう配設されていることを特徴とする請求項3に記載の離脱防止機能付きシール材。
- 爪部における先端部に続く受口端部側の面に、挿口の挿入時に、回転用弾性体により回転されたロック体において、このロック体の爪部が挿口の外周面に当接することを阻止または当接する力を軽減させる保護材が配設されていることを特徴とする請求項1~5の何れか1項に記載の離脱防止機能付きシール材。
- 保護材は、対応する爪部の受口端部側の面に、ほぼ一定厚みの薄肉状に形成されていることを特徴とする請求項6に記載の離脱防止機能付きシール材。
- 保護材に、この保護材が配設されている爪部の先端部近傍箇所における管径方向内側の面に厚肉部が設けられ、前記保護材の厚肉部が、前記爪部よりも狭く小さい領域に形成されていることを特徴とする請求項6に記載の離脱防止機能付きシール材。
- 保護材は、対応する爪部との間に隙間を有する状態で形成されていることを特徴とする請求項6に記載の離脱防止機能付きシール材。
- ロック体は、環状のシール材本体に対して、管の周方向に間隔をあけて複数配設され、回転用弾性体は、当該シール材における管の周方向に沿うロック体の幅方向に対する両端部対応箇所にそれぞれ配設され、保護材が設けられた爪部が、前記回転用弾性体の間に形成されていることを特徴とする請求項6~9の何れか1項に記載の離脱防止機能付きシール材。
- ロック体は、環状のシール材本体に対して、管の周方向に間隔をあけて複数配設され、回転用弾性体は、当該シール材における管の周方向に沿うロック体の幅方向に対する中央部対応箇所に配設され、保護材が設けられた爪部が、ロック体の幅方向に対する両端部にそれぞれ配設されていることを特徴とする請求項6~9の何れか1項に記載の離脱防止機能付きシール材。
- 回転用弾性体は、シール材本体と同じ材料、またはシール材本体と同じ硬度の材料で形成されていることを特徴とする請求項1~11の何れか1項に記載の離脱防止機能付きシール材。
- 回転用弾性体は、シール材本体と異なる材料、またはシール材本体と異なる硬度の材料で形成されていることを特徴とする請求項1~11の何れか1項に記載の離脱防止機能付きシール材。
- 請求項1~13の何れか1項に記載の離脱防止機能付きシール材を備えていることを特徴とする離脱防止管継手。
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JP2010101568A JP5489843B2 (ja) | 2009-10-07 | 2010-04-27 | 離脱防止機能付きシール材および離脱防止管継手 |
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CN104006236A (zh) * | 2014-05-04 | 2014-08-27 | 安徽涌畅铸件有限公司 | 一种滑入式防脱落接管 |
CN106322027B (zh) * | 2016-11-21 | 2018-07-13 | 新兴铸管股份有限公司 | 复合锚固体和利用该锚固体的管道连接装置及其安装方法 |
CN107863163A (zh) * | 2017-10-21 | 2018-03-30 | 肇庆鼎湖檀树电子科技有限公司 | 适用于核电站的冷却装置 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01112095A (ja) * | 1987-10-01 | 1989-04-28 | Cie Saint Gobain Pont A Mousson | 管継手用の環状パッキン |
JPH0396788A (ja) * | 1989-06-30 | 1991-04-22 | Cie Saint Gobain Pont A Mousson | 弾性密封ガスケット |
JPH04249690A (ja) * | 1989-12-11 | 1992-09-04 | Cie Saint Gobain Pont A Mousson | 複合ガスケット及び入れ子式固定密封組立品 |
JPH06221478A (ja) * | 1992-11-04 | 1994-08-09 | United States Pipe Foundry Co | 圧力管接合部のための改良された固定部材 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
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EP0076275A1 (de) * | 1981-03-30 | 1983-04-13 | SEILER, Georg | Abgedichtete und gegen schubkräfte gesicherte muffenverbindung an kunststoffrohren |
GB2272264B (en) * | 1992-11-04 | 1995-12-06 | Victaulic Plc | Pipe joints and gaskets therefor |
FR2765658B1 (fr) * | 1997-07-07 | 1999-08-20 | Pont A Mousson | Dispositif de verrouillage pour un assemblage de deux elements de canalisation, et assemblage d'elements de canalisation en comportant application |
FR2875888B1 (fr) * | 2004-09-24 | 2006-12-01 | Saint Gobain Pam Sa | Garniture d'etancheite et assemblage correspondant |
-
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- 2010-04-27 JP JP2010101568A patent/JP5489843B2/ja active Active
- 2010-06-29 CN CN201080044882.1A patent/CN102575799B/zh not_active Expired - Fee Related
- 2010-06-29 WO PCT/JP2010/061003 patent/WO2011043113A1/ja active Application Filing
- 2010-10-06 SA SA110310750A patent/SA110310750B1/ar unknown
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01112095A (ja) * | 1987-10-01 | 1989-04-28 | Cie Saint Gobain Pont A Mousson | 管継手用の環状パッキン |
JPH0396788A (ja) * | 1989-06-30 | 1991-04-22 | Cie Saint Gobain Pont A Mousson | 弾性密封ガスケット |
JPH04249690A (ja) * | 1989-12-11 | 1992-09-04 | Cie Saint Gobain Pont A Mousson | 複合ガスケット及び入れ子式固定密封組立品 |
JPH06221478A (ja) * | 1992-11-04 | 1994-08-09 | United States Pipe Foundry Co | 圧力管接合部のための改良された固定部材 |
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CN102575799B (zh) | 2014-06-25 |
JP5489843B2 (ja) | 2014-05-14 |
CN102575799A (zh) | 2012-07-11 |
SA110310750B1 (ar) | 2014-08-11 |
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