JP2004003539A - Disengagement prevention device for pipe joint part - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently and easily perform mounting works of both fitting devices for both pipe parts while simplifying and miniaturizing each fitting device and reducing manufacturing cost. <P>SOLUTION: A connection means 5 connecting the first fitting device 3 fitted externally and fixed in an insertion port pipe part with the second fitting device 4 fitted externally and fixed in a receive port pipe part is constituted by providing an engaging part 5E and an engaged part 5F which can engage and disengage freely from the direction in which they cross the direction of arm extension and are provided with allowance for allowing relative moving within a fixed scope in the direction of arm extension in a section where a connection arm 5A extended from one end part of a second divided fitting body 4A on one side and a connection arm 5B extended from one end part of a second divided fitting body 4A on one side oppose mutually and a section where a connection arm 5C extended from the other end part of the first divided fitting body 3B on the other side and a connection arm 5D extended from the other end part of the second divided fitting body 4B on the other side oppose mutually. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention prevents a receiving tube portion and a receiving tube portion inserted and connected to the receiving tube portion from the tube axis direction from moving away in the tube axis direction due to an external force caused by an earthquake, uneven settlement, or the like. The present invention relates to a device for preventing a pipe joint from coming off.
[0002]
[Prior art]
As shown in FIGS. 7 and 8, in a conventional pipe joint detachment preventing device, a pipe fitting 2 is detachably attached to an inlet pipe 2 inserted and connected to a receiving pipe 1 from a pipe axis X direction. A first mounting tool 50 including a pair of first split mounting bodies 50A and 50B that are freely fitted and fixed to the outside, and a pair of second fittings that are fitted and fixed to the receiving pipe section 1 so as to be detachable from the pipe radial direction. A second mounting tool 51 including split mounting bodies 51A and 51B is provided, and a connecting means 52 is provided for connecting the two mounting tools 50 and 51 so as to be relatively movable within a certain range in the tube axis X direction. ing.
[0003]
Further, the connecting means 52 includes two connecting arms 52A extending from both ends in the circumferential direction of the first first split mounting body 50A to the other side along the pipe axis X direction, and one second split mounting body 50A. The overlapping portion opposing the two connecting arms 52B extending to the other side along the pipe axis X direction from both ends in the pipe circumferential direction of the body 51A, and the pipe circumferential direction of the other first split mounting body 50B Both connecting arms 52C extending from both ends to the other side along the pipe axis X direction, and both ends of the other second split mounting body 51B in the pipe circumferential direction to the other side along the pipe axis X direction. Relative movement within a certain range in the direction in which the arm extends can be freely disengaged from the direction intersecting the arm extending direction with respect to each of the overlapping portions opposing the extended connecting arms 52D. An engaging projection 52E and a long engaging hole 52F are provided. Is (e.g., see Japanese Patent Utility Model Registration No. 2596193)
[0004]
[Problems to be solved by the invention]
In the conventional device for preventing detachment of a pipe joint, both ends of the first split mounting members 50A and 50B constituting the first mounting device 50 in the circumferential direction of the pipe, and both second split mounting devices forming the second mounting device 51 are provided. Since a total of eight connecting arms 52A to 52D are provided continuously at both ends in the pipe circumferential direction of the bodies 51A and 51B, the mounting tools 50 and 51 are easily complicated and large, and the manufacturing cost is increased. Easy to call.
[0005]
Moreover, the engaging projections 52E provided on the four pairs of connecting arms 52A to 52D are engaged with the engaging long holes 52F, and the first split mounting members 50A and 50B are connected to each other while maintaining the state. Since it is necessary to fix and connect the second divided mounting bodies 51A and 51B with the bolts 53 and the nuts 54, much labor is required for mounting the two mounting tools 50 and 51.
[0006]
SUMMARY OF THE INVENTION The present invention has been made in view of the above situation, and a main problem thereof is that both mounting tools for both pipe parts are simplified while reducing the size and manufacturing cost of each mounting tool. An object of the present invention is to provide a device for preventing a pipe joint from being detached, which can efficiently and easily perform the mounting work.
[0007]
[Means for Solving the Problems]
A characteristic configuration according to claim 1 of the present invention is a first configuration in which a pair of first split mounting bodies are detachably fitted to and fixed to an insertion tube portion inserted and connected to the reception tube portion from the tube axis direction. 1 mounting tool, and a second mounting tool including a pair of second split mounting bodies which are detachably fitted and fixed to the receiving tube portion so as to be detachably attached thereto. A detachment prevention device for a pipe joint portion provided with a connecting means for relatively movably connecting within a certain range,
A connecting arm extending from one end in the circumferential direction of the pipe of one of the first split mounting bodies to the other side along the pipe axis direction, and one end of the second split mounting body in the circumferential direction of the pipe; Opposing to the connecting arm extending to the other side along the tube axis direction from the other, and the other side along the tube axis direction from the other end in the tube circumferential direction of the other first split mounting body Each of the opposed portions of the connecting arm extended to the second arm and the connecting arm extending to the other side along the pipe axis direction from the other end in the pipe circumferential direction of the other second split mounting body, An engaging portion and an engaged portion are provided that are freely disengageable from a direction intersecting the arm extending direction and have flexibility to allow relative movement within a certain range in the arm extending direction. It is in the point that it is composed.
[0008]
According to the above-mentioned characteristic configuration, one of the pair of first split mounting bodies forming the first mounting tool and the pair of second split mounting bodies forming the second mounting tool, one of which opposes in the tube axis direction. In the first and second split mounting bodies, a connecting arm is continuously provided only at one end in the pipe circumferential direction, and in the other first and second split mounted bodies, the connecting arm is continuously provided only at the other end in the pipe circumferential direction. The number of connecting arms is halved compared to the conventional art, and the number of engaging portions and engaged portions provided at opposing portions of the connecting arm is halved accordingly. The labor required for the engagement operation is also reduced.
[0009]
Accordingly, it is only necessary to engage the two pairs of connecting arms while simplifying, miniaturizing, and reducing the manufacturing cost of each mounting device including the connecting arm, and thus attaching both mounting devices to both pipe portions. Work can be performed efficiently and easily.
[0010]
According to a second aspect of the present invention, a characteristic feature of the device for preventing a pipe joint from being detached is that each of the connecting portion of the first split mounting member and the connecting portion of the second split mounting member has a regular shape. In this case, the connection restricting means is provided to allow the connection of the connection mating portion only in the state of combination.
[0011]
According to the above-mentioned characteristic configuration, even when the first split mounting body and the second split mounting body are erroneously combined when the two mounting tools are mounted on the two connected pipe sections, the first split mounting body and the second split mounting body are provided in each of the connecting and joining portions. Due to the connection restricting means, it is not possible to join the connection mating parts, and therefore, before the two split mounting bodies are fixedly connected to each other, it is possible to easily notice an error in the combination, which is caused by re-performing the fixed connection operation. A decrease in work efficiency can be suppressed.
[0012]
According to a third aspect of the present invention, a characteristic feature of the device for preventing a pipe joint from being detached is that a bending angle of both fittings is within an allowable bending angle range of both connecting pipes between the engaging portion and the engaged portion. When the two fittings are in a specific bending posture outside the allowable bending angle range of both the connection pipes, the engagement with the engagement part is prevented. The present invention is characterized in that a retaining means is provided for allowing the joint to be disengaged and moved.
[0013]
According to the above-mentioned characteristic configuration, in a state where both fittings are attached to both connected pipe sections, even if both fittings bend following the bending of both connecting pipes, the bending angles of both fittings are both. Since the connecting pipe portion is within the allowable bending angle range, it is possible to prevent the engaging portion from being pulled out of the engaging portion by the retaining means. Nevertheless, in a state in which both the mounting tools are operated in a specific bending posture outside the allowable bending angle range of both the connection pipe portions, the retaining means allows the engaged portion to be disengaged from and disengaged from the engaging portion. , Both attachments can be easily attached and detached.
[0014]
Therefore, while the both fittings smoothly follow and bend following the bending of both connecting pipe portions caused by an earthquake, uneven settlement, etc., the engagement state between the engaging portion and the engaged portion by the retaining means. By maintaining the above, it is possible to easily perform the work of connecting and disconnecting the two mounting tools, while reliably exhibiting the function of preventing the detachment of both connection pipes.
[0015]
According to a fourth aspect of the present invention, the detachment preventing device for a pipe joint portion has a structure in which the retaining means has a length slightly larger than a long diameter of the long engaging hole constituting the engaged portion. The present invention is characterized in that a retaining portion formed to have a width smaller than the minor diameter of the combined elongated hole is provided at a tip end of an engaging projection constituting an engaging portion.
[0016]
According to the above-mentioned characteristic configuration, the engagement state between the engaging portion and the engaged portion is maintained regardless of the bending of the two connection pipe portions caused by an earthquake, uneven settlement, or the like, thereby preventing the two connection pipe portions from being detached. A stopper with a length slightly larger than the long diameter of the long slot and a width smaller than the short diameter of the long slot, while providing the locking means for reliably exerting the function. Since the portion can be simply remodeled by providing the portion at the tip of the engagement projection, the manufacturing cost can be reduced.
[0017]
According to a fifth aspect of the present invention, there is provided a pipe joint detachment prevention device, wherein the first and second split mounting members are formed of the same diameter having an engaging portion or an engaged portion. And that the second divided mounting bodies are formed of the same member having an engaged portion or an engaging portion.
[0018]
According to the above-described characteristic configuration, it is only necessary to manufacture two types of the first split mounting body and the second split mounting body, and it is possible to promote a reduction in the manufacturing cost of the detachment prevention device.
[0019]
BEST MODE FOR CARRYING OUT THE INVENTION
[First Embodiment]
FIGS. 1 to 5 show the structure of another fluid transport pipe P with respect to an inlet pipe section 1 of a fluid transport pipe P such as a water pipe or a gas pipe formed using a cast iron pipe, a steel pipe, a vinyl chloride pipe, or the like. The inlet pipe 2 is attached to a pipe joint that is inserted and connected so as to be able to expand and contract along the pipe axis X direction and bend freely within a certain angle range, and to receive the socket by external force caused by an earthquake or uneven settlement. A detachment preventing device for preventing the tube portion 1 and the insertion tube portion 2 from being disengaged and moved in the direction of the tube axis X is shown. The first mounting tool 3 including the split mounting bodies 3A and 3B and the second mounting tool 4 including a pair of second split mounting bodies 4A and 4B detachably fitted to the receiving tube portion 1 and detachably attached thereto. A connecting means 5 is provided for connecting the two mounting tools 3 and 4 so as to be relatively movable and bendable within a certain range in the tube axis X direction. It has been.
[0020]
In an annular groove 1a formed in the inner peripheral surface of the receiving tube portion 1, an annular elastic sealing material 6 capable of sealing the outer peripheral surface of the insertion tube portion 2 is mounted. The receiving tube portion 1 and the insertion tube portion 2 are configured to be bendable within a gap formed between the inner peripheral surface of the mouth tube portion 1 and the outer peripheral surface of the insertion tube portion 2. .
[0021]
The first split mounting bodies 3A and 3B of the first mounting tool 3 are formed in a semicircular shape that can be encased in the outer circumferential surface of the insertion tube portion 2 from the pipe radial direction, and both ends in the circumferential direction of the pipe. The connection flange portions (an example of a connection joining portion) 3a, 3b for fixing and connecting the first split mounting bodies 3A, 3B with bolts 7 and nuts 8, which are examples of fasteners, are integrally formed on the portions. .
[0022]
On the inner peripheral surface of each of the first divided mounting bodies 3A and 3B, a biting portion 9 composed of a group of a large number of protrusions 9a that bites into the outer peripheral surface of the insertion tube portion 2 with the tightening operation by the bolts 7 and the nuts 8 is provided. Among the projections 9a, the projections 9a located at both ends in the pipe circumferential direction are formed in a posture along the pipe circumferential direction, and further, the projections 9a located at an intermediate side in the pipe circumferential direction. The group is formed so as to have an inclined posture that intersects both in the pipe axis X direction and the pipe circumferential direction, and that the tilt directions are opposite to each other with respect to a center position in the pipe circumferential direction.
[0023]
The second split mounting bodies 4A and 4B of the second mounting tool 4 are formed in a semicircular shape that can be enveloped from the pipe diameter direction with respect to the outer peripheral surface of the small-diameter pipe portion 1A of the receiving pipe section 1, At both ends in the circumferential direction of the pipe, connecting flanges (an example of a connecting portion) 4a, 4b for fixing and connecting the two second divided mounting bodies 4A, 4B with bolts 7 and nuts 8, which are examples of fasteners. Are integrally formed.
[0024]
On the inner peripheral surface of each of the second divided mounting bodies 4A and 4B, there are formed a plurality of projections 9a that bite into the outer peripheral surface of the small-diameter tube portion 1A of the receiving tube portion 1 with the tightening operation by the bolts 7 and the nuts 8. The protruding portion 9 is formed so as to protrude, and among the projections 9a, the projections 9a located at both ends in the circumferential direction of the pipe are formed in a posture along the circumferential direction of the pipe. The projections 9a located on the side are formed in an inclined posture intersecting both with respect to the pipe axis X direction and the pipe circumferential direction, and in such a state that the tilt directions are opposite to each other with respect to the center position in the pipe circumferential direction. Have been.
[0025]
The connecting means 5 includes a connecting flange portion 3a located on one end side in the pipe circumferential direction of one first split mounting body 3A and a connecting flange located on one end side in the circumferential direction of one second split mounting body 4A. In the part 4a, connecting arms 5A and 5B extending toward each other along the pipe axis X direction are integrally formed, and the other first split mounting body 3B is provided on the other end side in the pipe circumferential direction. The connecting flange portion 3b located on the other side and the connecting flange portion 4b located on the other end side in the tube circumferential direction of the other second split mounting body 4B also extend toward each other along the tube axis X direction. The connecting arms 5C and 5D are integrally formed, and the overlapping portions of one of the connecting arms 5A and 5B and the overlapping portions of the other connecting arms 5C and 5D are respectively provided in the arm extending direction. Perpendicular direction (example of cross direction) An engaging portion 5E and an engaged portion 5F are provided, which are freely disengageable and have flexibility to allow relative movement and bending within a certain range in the arm extending direction (the tube axis X direction). It is configured.
[0026]
Further, the connecting flange portions 3a and 3b of the first split mounting members 3A and 3B and the connecting flange portions 4a and 4b of the second split mounting members 4A and 4B are in a proper combination state. A connection restricting means 10 is provided that allows the connection of the connection flanges 3a, 3b and 4a, 4b only when there is a certain condition, and both mounting tools 3 are provided between the engagement portion 5E and the engaged portion 5F. When the bending angle of the connecting pipe portions 1 and 2 is within the allowable bending angle range of the connecting pipe portions 1 and 4, the removal movement of the engaged portion 5F from the engaging portion 5E is prevented, and both the mounting tools 3 and 4 are moved. When the connecting pipes 1 and 2 are in a specific bending posture outside the allowable bending angle range, a retaining means 11 is provided to allow the engaged portion 5F to be disengaged from and disengaged from the engaging portion 5E.
[0027]
The first split mounting bodies 3A, 3B are formed of the same shape in which a pin-shaped engaging projection 5E forming an engaging portion is integrally formed at the tip of the connecting arm 5A, 5C. Each of the second split mounting bodies 4A and 4B is also formed of the same shape in which an oval engaging long hole 5F forming an engaged portion is formed through the leading end of the connecting arm 5B or 5D. Further, the inner diameters of both the first split mounting bodies 3A, 3B and the inner diameters of both the second split mounting bodies 4A, 4B are formed to have the same diameter, so that both the first split mounting bodies 3A, 3B and the second split sections are formed. The mounting bodies 4A and 4B are configured so as to be externally fitted and fixed to both the receiving tube portion 1 and the insertion tube portion 2.
[0028]
The connection restricting means 10 is provided on the mating surface side of the connection flanges 3a, 3b on one end side in the pipe circumferential direction of the first split mounting bodies 3A, 3B, and on the connection flange 3a, 3b on the other end side in the pipe circumferential direction thereof. A first restricting projection 10b is formed in the engaging hole 10a formed on the mating surface side so as to be engaged from the mating direction, and the connecting flanges 4a, 4b on one end side in the pipe circumferential direction of the second split mounting bodies 4A, 4B are formed. A second regulating projection 10d is formed on the mating surface side of the connecting flange 4b in the mating direction with the engaging hole 10c formed on the mating surface side of the connecting flange 4a, 4b on the other end side in the pipe circumferential direction. It is configured.
[0029]
When the first divided mounting bodies 3A and 3B and the second divided mounting bodies 4A and 4B are in a proper combination state, the respective restriction protrusions 10b and 10d engage with the engagement holes 10a and 10c, respectively. The connection flange portions 3a, 3b and 4a, 4b are allowed to be joined together, and a non-regular combination state in which one of the first split mounting bodies 3A, 3B and one of the second split mounting bodies 4A, 4B are combined. In some cases, the restricting projections 10b and 10d abut each other so that the connecting flange portions cannot be joined.
[0030]
The retaining means 11 is an elliptical disk-shaped member having a length L slightly larger than the long diameter D1 of the long engagement hole 5F and a width W smaller than the short diameter D2 of the long engagement hole 5F. The retaining portion is formed integrally with the tip of the engagement projection 5E.
[0031]
[Second embodiment]
In the above-described first embodiment, both the first split mounting members 3A and 3B are formed of the same shape in which the engagement protrusions 5E are integrally formed at the distal ends of the connecting arms 5A and 5C, and the second split mounting members are formed. 4A and 4B are formed of the same shape in which an engagement long hole 5F is formed through the distal end of the connecting arm 5B or 5D, but as shown in FIG. The 3B and the second split mounting bodies 4A, 4B may be formed from left-right symmetrical ones.
[0032]
That is, the connecting flange portion 3a located on one end side in the pipe circumferential direction of one first split mounting body 3A and the connecting flange portion 4a located on one end side in the pipe circumferential direction of one second split mounting body 4A, Connecting arms 5A and 5B extending toward each other along the pipe axis X direction are integrally formed, and a connecting flange located on the other end side in the pipe circumferential direction of the other first split mounting body 3B. A connection arm extending toward the other side along the pipe axis X direction also on the portion 3b and the connection flange portion 4b located on the other end side in the pipe circumferential direction of the other second split mounting body 4B. 5C and 5D are integrally formed, and the leading end of the connecting arm 5A on the first split mounting body 3A side and the leading end of the connecting arm 5D on the other second split mounting body 4B are engaged with each other. Of the oval engagement long hole 5F constituting Pin-shaped engaging projections forming an engaging portion are provided at each of the distal end of the connecting arm 5C on the other first split mounting body 3B side and the distal end of the connecting arm 5B on the one second split mounting body 4A side. 5E is integrally molded.
Since the other configuration is the same as the configuration described in the first embodiment, the same components are denoted by the same reference numerals as those in the first embodiment, and description thereof will be omitted.
[0033]
[Other embodiments]
(1) In each of the above-described embodiments, the first mounting tool 3 and the second mounting tool 4 are provided between the engaging portion 5E and the engaged portion 5F due to the expansion and contraction operation of the two connection pipe portions 1 and 2. The first mounting device 3 and the second mounting device associated with the relative movement within a certain range in the arm extending direction (direction of the tube axis X) and the bending of both connecting pipe portions 1 and 2 within a certain angular range. Although the flexibility (gap) that allows relative bending with respect to 4 is provided, it is sufficient that at least flexibility that allows relative movement within a certain range in the arm extending direction is provided.
(2) In each of the above embodiments, the engaging portion 5E is formed of a pin-shaped engaging projection, and the engaged portion 5F is formed as an oval long engaging hole. The engaged portion 5F is not limited as long as the first mounting device 3 and the second mounting device 4 can be detachably connected to each other by a disengagement operation from a direction crossing the arm extending direction. A structure may be used.
(3) In each of the above embodiments, the connection restricting means 10 is constituted by the engagement holes 10a, 10c and the restricting projections 10b, 10d. However, as the coupling restricting means 10, both the first split mounting bodies 3A, 3B are used. Of the connecting parts 3a, 3b and the connecting parts 4a, 4b of the second divided mounting bodies 4A, 4B, respectively, only when they have a proper combination. Any structure may be used as long as it allows the bonding of the substrate 4b.
(4) In each of the above-described embodiments, the inner peripheral surfaces of both the first divided mounted members 3A and 3B and the inner peripheral surfaces of the second divided mounted members 4A and 4B are tightened by the bolts 7 and the nuts 8. The biting portion 9 composed of a large number of protrusions 9a biting into the outer peripheral surfaces of the insertion tube portion 2 and the receiving tube portion 1 is formed to protrude. Alternatively, the retaining ring may be mounted on the inner peripheral surfaces of the first and second split mounts 3A and 3B and the inner peripheral surfaces of the second split mounts 4A and 4B.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing a first embodiment of the present invention. FIG. 2 is a horizontal sectional view when attached to a pipe joint. FIG. 3 is a partially cutaway side view when attached to a pipe joint. 4 is a sectional view taken along line IV-IV in FIG. 2; FIG. 5 is a sectional view taken along line VV in FIG. 2; FIG. 6 is an exploded perspective view showing a second embodiment of the present invention; Horizontal cross-sectional view when the device is attached to a pipe joint part.
X pipe shaft core 1 receiving pipe section 2 insertion pipe section 3 first mounting tool 3A first split mounting body 3B first split mounting body 3a connection joining section (connection flange section)
3b Connection part (connection flange part)
4 Second mounting tool 4A Second split mounting body 4B Second split mounting body 4a Connection joining portion (connection flange portion)
4b Connection part (connection flange part)
Reference Signs List 5 connecting means 5A connecting arm 5B connecting arm 5C connecting arm 5D connecting arm 5E engaging part 5F engaged part 10 connection regulating means 11 retaining means

Claims (5)

A first mounting device including a pair of first split mounting bodies detachably fitted and fixed to an insertion tube portion inserted and connected to the reception tube portion from the tube axis direction, and a reception tube portion; And a second mounting tool comprising a pair of second split mounting bodies which are detachably fitted to and detachably attached to each other, and are connected to each other so as to be relatively movable within a certain range in the axial direction of the tube axis. A detachment prevention device for a pipe joint portion provided with a means,
A connecting arm extending from one end in the circumferential direction of the pipe of one of the first split mounting bodies to the other side along the pipe axis direction, and one end of the second split mounting body in the circumferential direction of the pipe; Opposing to the connecting arm extending to the other side along the tube axis direction from the other, and the other side along the tube axis direction from the other end in the tube circumferential direction of the other first split mounting body Each of the opposed portions of the connecting arm extended to the second arm and the connecting arm extending to the other side along the pipe axis direction from the other end in the pipe circumferential direction of the other second split mounting body, An engaging portion and an engaged portion are provided that are freely disengageable from a direction intersecting the arm extending direction and have flexibility to allow relative movement within a certain range in the arm extending direction. A detachment prevention device for the pipe joint part that is configured. A connection restricting means for allowing the connection of the connecting portion of the first split mounting body and the connecting portion of the second split mounting body only when they are in a proper combination state. The detachment prevention device for a pipe joint according to claim 1, further comprising: When the bending angles of both the attachments are within the allowable bending angle range of the two connection pipe portions, the removal of the engaged portion from the engaging portion is prevented between the engaging portion and the engaged portion. And a retaining means for permitting engagement and disengagement movement of the engaged portion with respect to the engaging portion when the both mounting tools are in a specific bending posture outside the allowable bending angle range of both connecting pipe portions. 3. The detachment prevention device for a pipe joint according to claim 1 or 2. The retaining portion has a length slightly larger than the major axis of the long hole forming the engaged portion, and a retaining portion formed with a width smaller than the minor axis of the long hole. 4. The detachment prevention device for a pipe joint according to claim 3, wherein the device is provided at a distal end portion of an engagement protrusion constituting the engagement portion. The first split mounting bodies are formed of the same diameter having an engaging portion or an engaged portion, and the second split mounting bodies are provided with an engaged portion or an engaging portion. The detachment prevention device for a pipe joint according to any one of claims 1 to 4, wherein the device is formed of the same material.

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