JP5089487B2 - Pipe joint structure, pipe fittings equipped with this - Google Patents

Description

  The present invention relates to a pipe joint structure that can be widely used when piping various pipe bodies for water supply and drainage, and a pipe joint provided with the pipe joint structure.

  Conventionally, for example, there are the following types of joint structures for this type of tubular body. That is, this conventional one is provided with a branch pipe portion to which the drainage horizontal pipe is connected to the side surface of the joint body, and forms two annular grooves with a predetermined interval on the inner peripheral surface of the joint body, and A rubber ring is attached to the annular groove. The drain pipe is rotatably inserted through the joint body.

And, for example, when the installation location of drainage equipment etc. is changed at the time of layout change or renewal after piping construction, if the joint body is rotated with respect to the drainage pipe, the branch pipe part is arranged at a desired position It is possible. The joint structure has an advantage that it can cope with a change in the arrangement of the piping.
JP 2003-253717 A

  However, in the conventional joint structure of a tubular body, the inner diameter of the rubber ring is the outer diameter of the drain pipe so that the outer peripheral surface of the drain pipe and the rubber ring are in pressure contact when the drain pipe and the rubber ring are connected. Is set smaller than. For this reason, the work of inserting the drain pipe into the joint body has been very troublesome. In particular, indoor piping work such as an attic performed in a situation where there is not enough piping space is extremely complicated and burdensome to the operator.

  Further, in the above conventional one, there is no particular means for preventing the drain pipe from detaching from the joint body. Therefore, the drain pipe is connected to the joint body only by the pressure contact force against the drain pipe of the rubber ring. There was also a problem that he was carelessly left.

  Furthermore, there has been a drawback in that a good sealing state between the rubber ring and the outer peripheral surface of the pipe body is likely to be impaired by the rotation operation of the joint body when the layout of the piping is changed due to the structure. Further, since the rubber ring is likely to be worn, the circulating fluid leaks from the joint portion. Therefore, there are inconveniences in maintenance and management, such as requiring early replacement of the rubber ring.

  The present invention has been made in view of such a point, and an object of the present invention is to make it possible to easily attach and detach the tube body and to maintain its connection state well. The goal is to enable a quick and flexible response to the situation of layout changes.

  In order to solve the above problems, a joint structure of a tubular body according to the present invention includes a joint body into which a tubular body is inserted, a fixing ring through which the tubular body is inserted and attached to the joint body by a rotating operation, A tubular body is inserted, fitted into the fixing ring so as to be separated from each other in the longitudinal direction of the tubular body, and sandwiched between the pair of annular bodies that are rotatable with respect to the fixing ring; When the fixing ring is rotated, the annular bodies are pressed against each other by approaching each other, bulge inward in the radial direction, and can be pressed against the outer peripheral surface of the tubular body. And a seal body.

  In the joint structure of the above tubular body, when the tubular body to be piped is inserted into the annular body of the stationary ring, if the stationary ring is rotated, it is pressed by the annular body, and the sealing body is radially inward. Swelled and pressed against the outer peripheral surface of the tubular body, and the tubular body is connected to the joint body. On the other hand, when the tube body is detached from the joint body, if the fixing ring is rotated in the opposite direction, the pressing state by the annular body is released, and the seal body bulges outward and the inner diameter increases. become. Thereby, the press-contact state between the seal body and the outer peripheral surface of the pipe body is released, and the pipe body can be detached from the joint body.

  That is, the insertion / removal operation of the tubular body with respect to the annular body can be performed without bringing the tubular body into contact with the seal body and can be performed by an extremely easy operation of rotating the fixing ring. For this reason, skilled work is not required, the burden on the worker is small, and a series of work at the site can be performed efficiently. This is particularly useful in situations where there is not enough piping space.

  Moreover, since the annular body through which the pipe body is inserted is rotatably fitted to a fixing ring provided in the joint body, the joint body can be easily rotated with respect to the pipe body. Therefore, for example, in the case of having a branch portion on the side surface of the joint body, even if the arrangement position of the pipe piped to the branch portion is changed, the branch portion can be obtained by appropriately rotating the joint body. Can be arranged at a desired position, and a tube body can be connected thereto. In other words, it is possible to respond quickly and flexibly to a situation such as a layout change after piping construction.

  Moreover, it is also possible to provide the annular convex part which contacts the inner peripheral surface of a fixing ring in the outer peripheral surface of the said annular body.

  As a result, the ring-shaped body rotates while its engaging convex portion is in contact with the inner peripheral surface of the fixing ring, so that the contact area between the two becomes very small and the rotation operation of the fixing ring is simplified. Can be performed, and workability is improved.

  Further, a step portion is formed on the inner peripheral surface of the annular body, the seal body is mounted on the step portion of the annular body, and the both annular members are arranged to face each other with a gap. It doesn't matter.

  In this case, when the fixing ring is rotated, the seal body is pressed so that the gap formed between the annular bodies is reduced, and the seal body bulges inward in the radial direction and presses against the outer peripheral surface of the tube body. Will do.

  At that time, since the seal body is mounted on the step portion of the annular body and the pair of annular bodies are brought close to each other so that a gap is formed between them, the seal body is pressed when the seal body is pressed. Bulges outward, contacts the inner peripheral surface of the fixing ring, and the sealing body bulges inward in the radial direction without causing any trouble in the rotation of the fixing ring. Is planned.

  Furthermore, you may form a recessed part in the circumferential direction in the outer peripheral surface of the said sealing body.

  According to this, since the sealing body is pressed by the annular body so that the concave portion of the outer peripheral surface thereof is closed, the sealing body is suitably bulged inward, and good sealing performance can be ensured. It is.

  Further, the annular body can be formed of a resin material having a low friction coefficient.

  According to this, the fixing ring can be easily rotated with respect to the annular body, and the piping work of the tubular body can be performed more easily.

  As the resin material having such a low coefficient of friction, for example, Duracon is optimal.

  Furthermore, the pipe joint according to the present invention has the joint structure of the pipe body.

  Thereby, a pipe joint having the above-described effects can be obtained.

  Further, according to the present invention, there is provided a pipe joint structure and a main body provided with the pipe joint structure.

  Thus, it is possible to obtain the above-described effects.

  According to the present invention, not only can the tube body be attached and detached very easily, but the connection state can be maintained well, and further, the response to the situation of changing the piping layout can be performed quickly and flexibly. There is an effect.

<First embodiment>
The best mode for carrying out a pipe joint structure according to the present invention will be described below with reference to the drawings.

  FIG. 1 is a front view including a partial cross section illustrating a joint structure of a tubular body according to the present embodiment. Reference numeral 1 in the drawing is a joint body provided with a branch portion 3 on the side surface of the straight pipe portion 2, and a connecting portion 5 is provided on each of the straight pipe portion 2 and the distal end side of the branch portion 3 via a flange 4. It has been.

  As shown in FIG. 2, the notch 6 is formed with three notches 6 at a predetermined interval. Further, on the side surface of the connecting portion 5, as shown in the figure, three engagement grooves 7 are provided with a predetermined interval. The engaging groove 7 has an insertion portion 8 formed in the tube axis direction, a first straight portion 9 provided horizontally and orthogonally to the insertion portion 8, and a predetermined angle with respect to the first straight portion 9. It consists of the inclined part 10 provided continuously and the horizontal second straight part 11 provided continuously to the inclined part 10. A curved convex portion 12 bulges out at a substantially central portion of the second straight portion 11. As shown in FIG. 3, reference numeral 40 denotes a convex portion provided with a tapered surface 41 on the insertion side of the insertion portion 8 of the engagement groove 7.

  Reference numeral 13 denotes a fixing ring attached to the connecting portion 5 of the joint body 1. The fixing ring 13 is used for connecting the tube body X to the joint body 1 by pressing a seal body 30 (to be described later) against the outer peripheral surface of the tube body X by its rotational operation. As shown in FIG. 3, three engagement convex portions 14 slidably engaged with the engagement grooves 7 of the joint body 1 are provided on the inner peripheral surface of the one end side of the fixing ring 13 with a predetermined interval. It has been. When the fixing ring 13 is attached to the joint main body 1, the insertion convex portion 14 of the fixing ring 13 is inserted over the tapered surface 41 and the convex portion 40 provided in the engaging groove 7 of the joint main body 1. 8 is inserted. Thereby, the integrity of the fixing ring 13 and the joint body 1 is maintained. Therefore, if it is manufactured up to this state in advance in a factory or the like, it is possible to simplify the transfer work to the site and the piping work at the site, and the work efficiency is greatly improved. Further, it is possible to satisfactorily avoid a situation in which each component such as the fixing ring 13 is lost. Note that the fixing ring 13 is not necessarily provided so as not to be detached from the joint body 1 as described above, and may be configured to be removable.

  As shown in FIG. 4, reference numeral 15 denotes a collar provided at one end of the fixing ring 13. Three notches 16 are formed in the flange 15 with a predetermined interval. These three cutouts 16 are formed on the flange 4 of the joint body 1 when the engagement protrusion 14 of the fixing ring 13 is moved to the end of the second straight portion 11 of the engagement groove 7 of the joint body 1. It is formed at a position that matches the notch 6. Reference numeral 17 is an annular convex portion provided inwardly on the inner peripheral surface of the other end of the fixing ring 13. The outer peripheral surface on the other end side of the fixing ring 13 is formed in a polygonal shape.

  As shown in FIG. 5, reference numeral 18 denotes a stopper that is slidably fitted to the fixing ring 13. As shown in the figure, the annular stopper body 19 has three locking pieces 20 protruding upward with a predetermined interval. An engaging portion 21 is provided on the inner peripheral surface of the distal end portion of the locking piece 20. The locking piece 20 is engaged with the notch 6 of the joint body 1 through the notch 16 of the fixing ring 13, and the engaging part 21 is engaged with the flange part 4 to prevent the fixing ring 13 from rotating backward. To do. As shown in FIG. 4, reference numeral 22 is a tape adhered to the outer peripheral surface of the fixing ring 13. Based on whether or not the tape 22 is exposed to the outside, it can be visually confirmed from the outside whether or not the engaging portion 21 of the stopper 18 is engaged with the flange portion 4 of the joint body 1. In this case, instead of the tape 22, for example, a ring may be externally fitted or a paint may be applied. Further, when the engaging portion 21 of the stopper 18 is engaged with the joint body 1, the tape 22 or the like may be concealed by the stopper body 19.

  Reference numeral 23 denotes a pair of annular bodies that are rotatably fitted in the fixing ring 13. As shown in FIG. 6, two steps 24 and 25 are provided on the inner peripheral surface of the one end side of the annular body 23. The outer step portion 24 includes a peripheral surface portion 26, a taper portion 27, and an inner wall portion 28. In addition, two annular convex portions 29 are provided on the outer peripheral surface of the annular body 23 with a predetermined interval. It should be noted that the outer diameter of the annular convex portion 29 is set slightly smaller than the inner diameter of the fixing ring 13. For this reason, the annular body 23 is rotatably fitted in the fixing ring 13.

  Reference numeral 30 denotes a rubber seal body fitted to the outer stepped portion 24 so as to be disposed between a pair of annular bodies 23 arranged to face each other as shown in FIG. In this state, a gap 42 is formed between the annular bodies 23. Reference numeral 31 denotes a concave portion having a substantially V-shaped cross section formed at a substantially central portion of the outer peripheral surface of the seal body 30.

  As shown in FIG. 8, the depth A of the concave portion 31 of the seal body 30 is such that A> B with respect to the height B of the tapered portion 27 and the inner wall portion 28 of the annular body 23. Is set. In this case, A = B may be set. Further, the angle Θ with respect to the axial direction of the tapered portion 27 of each annular body 23 is set to 45 °, which is the same angle. In a state in which the seal body 30 is mounted on the pair of annular bodies 23, the gap width C between the end faces of the opposed annular bodies 23 is smaller than the width D of the concave portion 31 of the seal body 30. Further, a gap width E formed by the end face of the seal body 30 and the step portion 25 inside the annular body 23 facing the end face is set as small as possible.

  Further, as shown in the figure, the inner diameter F of the sealing body 30 is set slightly larger than the inner diameter G of the annular body 23, and the inner diameter G of the annular body 23 is set slightly larger than the outer diameter of the pipe body to be connected. ing. The annular body 23 is made of a synthetic resin such as Duracon, and the joint body 1 and the fixing ring 13 are made of a synthetic resin such as vinyl chloride.

  Reference numeral 32 denotes an O-ring mounted in a groove 33 formed in an annular shape on the end face of the joint body 1 as shown in FIG. When the fixing ring 13 is attached to the joint body 1, the back surface of the annular body 23 positioned on the inner side comes into contact with the end face of the joint body 1, and the O-ring 32 seals. Note that a lubricant is applied to the surface of the O-ring 32.

  The present embodiment is configured as described above. Next, the case where pipes, such as a water supply pipe and a drain pipe, are piped using this joint is explained.

  First, the tube X to be connected to the fixing ring 13 is inserted. In the present embodiment, the inner diameter F of the seal body 30 is set slightly larger than the inner diameter G of the annular body 23, and the inner diameter G of the annular body 23 is set larger than the outer diameter of the tube X to be connected. Moreover, since the gap width E formed by the end face of the seal body 30 and the step portion 25 inside the annular body 23 facing the end face is set as small as possible, the tube body X can be inserted smoothly.

  Next, as shown in FIG. 9, the fixing ring 13 is pressed toward the joint body 1, and the engagement convex portion 14 of the fixing ring 13 is moved to the end of the insertion portion 8 of the engagement groove 7. At that time, since the outer annular body 23 is pressed by the annular convex portion 17 of the fixing ring 13, the pair of annular bodies 23 and the seal body 30 move together to the joint body 1 side, and the inner annular body The back surface of 23 comes into contact with the end surface of the joint body 1.

  Further, when the fixing ring 13 is rotated as shown in FIG. 10, the engaging convex portion 14 slides on the second linear portion 11 through the first linear portion 9 and the inclined portion 10 of the engaging groove 7, and the second It moves over the convex part 12 provided in the straight line part 11 to its end.

  When the engaging convex portion 14 moves on the inclined portion 10 of the engaging groove 7, the seal body 30 is pressed by the annular convex portion 17 of the fixing ring 13 through the outer annular body 23. At this time, since the movement of the inner annular body 23 is restricted by the joint body 1, the seal body 30 receives the pressing force and bends, and bulges inward so that its inner diameter F is reduced. It will press-contact with the outer peripheral surface of X.

  In this case, the seal body 30 is pressed by the tapered portion 27 and the inner wall portion 28 of the step portion 24 of the annular body 23. The tapered portion 27 and the inner wall portion 28 of the annular body 23 are combined. The height B is set to be smaller than the depth A of the concave portion 31 of the seal body 30. Therefore, when the fixing ring 13 is rotated, a pressing force is applied so that the concave portion 31 of the seal body 30 is closed as shown in the figure, and the seal body 30 swells inward. For this reason, the tube body X can be easily connected without applying much rotational force to the fixing ring 13.

  Further, since the angle Θ with respect to the axial direction of the tapered portion 27 of each annular body 23 is set to 45 °, which is the same angle, a pressing force is applied from the annular bodies 23 to the sealing body 30 almost evenly, so that no deviation occurs. It will bulge inward. Therefore, there is an advantage that a sufficient pressure contact area with respect to the tube body X of the seal body 30 can be secured.

  Further, in a state where the seal body 30 is mounted on the pair of annular bodies 23, the gap width C between the end faces of the opposed annular bodies 23 is smaller than the width D of the concave portion 31 of the seal body 30. The body 30 does not bulge outward from between the annular bodies 23 and contacts the inner peripheral surface of the fixing ring 13. Therefore, the rotational torque of the fixing ring 13 is not increased. Further, the sealing body 30 does not hinder the rotation of the joint body 1.

  Further, when the sealing body 30 is pressed against the tube X, the sealing body 30 and the annular body 23 are fixed without rotating by the pressing, and only the fixing ring 13 can be rotated. Are in contact with only the two annular projections 29 of each annular body 23, and the annular body 23 is made of a duracon that is slippery and can be easily rotated. Therefore, it becomes easy to work.

  Thereafter, the locking piece 20 of the stopper 18 is slid to the joint body 1 side, the locking piece 20 is engaged with the notch 6, and the engaging portion 21 is engaged with the flange portion 4 of the joint body 1. . As a result, the mark 22 provided on the fixing ring 13 is exposed, and it can be visually confirmed from the outside that the stopper 18 functions reliably. As a result, a series of connection work of the tube body X is completed, but such a series of connection work has an advantage that it can be performed very easily. Therefore, even in a situation where the work space is limited, it is possible for the operator. A series of piping operations can be performed efficiently and without burden.

  In addition, the tube X connected in this way is engaged with the engagement between the projection 12 provided in the engagement groove 7 of the joint body 1 and the engagement projection 14 of the fixing ring 13 and the joint body 1 of the stopper 18. The reverse rotation is prevented by engaging with the notch 6, and the connection state of the tube body X is firmly maintained. Therefore, it is possible to reliably prevent a situation where the fixing ring 13 rotates inadvertently and the circulating fluid leaks or the tube body X is detached from the joint body 1.

  On the other hand, when the pipe body X is removed from the joint, the stopper 18 is slid to the pipe body X side (right direction in FIG. 10), and the engagement portion 21 and the flange portion 4 of the joint body 1 are engaged. While releasing the state, the locking piece 20 of the stopper 18 is detached from the notch 6 of the flange portion 4. It can be confirmed from the outside that the tape 22 is concealed by the stopper body 19 of the stopper 18 to ensure that this is done.

  Next, when a slightly strong rotational force is applied to rotate the fixing ring 13 in the opposite direction, the convex portion 12 provided in the engagement groove 7 of the joint body 1 is formed in a curved shape. The engagement state between the projection 12 and the engagement projection 14 of the fixing ring 13 is released. Furthermore, the fixing ring 13 is rotated to a position where the engaging convex portion 14 faces the convex portion 40 provided in the insertion portion 8 of the engaging groove 7.

  In addition, since the pressing force from the outer annular body 23 is removed by the engagement convex portion 14 moving in the reverse direction on the inclined portion 10 of the engagement groove 7, the inner diameter F of the seal body 30 is increased. The diameter returns to the original state. Thereby, since the press-contact state with the pipe body X is cancelled | released, the pipe body X can be easily removed from a coupling.

  Further, in this state, since the fixing ring 13 and the annular body 23 are rotatably fitted, the fixing ring 13 and the joint body 1 are connected to the annular body 23, the seal body 30 and the tube body X. It is possible to rotate.

  Therefore, when the installation location of the water supply / drainage device is changed due to a layout change after the construction of the piping, for example, when the arrangement of the pipe X to be piped to the branch portion 3 of the joint body 1 is changed, FIG. As shown above, after the branch part 3 of the joint body 1 is appropriately rotated according to the position of the pipe body X to be newly connected, the new pipe body X is connected to the branch part 3 as described above. Just do it. In this way, it is possible to respond quickly and flexibly to changes in the layout after the construction of the piping. In addition, when the arrangement | positioning of the pipe body X which should be piping to the straight pipe part 2 of the coupling main body 1 changes, it can respond similarly.

  Moreover, since the joint structure of the tubular body according to the present embodiment has an extremely simple structure as a whole, it has an advantage that it can be manufactured easily and inexpensively.

  In the above embodiment, the two annular convex portions 29 are formed on the outer peripheral surface of the annular body 23. However, the annular convex portions 29 may be provided if necessary, and may be omitted. Is possible. However, when providing the annular convex part 29, the specific number is not ask | required. Further, instead of the annular convex portion 29, for example, a part thereof is omitted, or a plurality of convex portions are provided with a predetermined interval, and the convex portion and the inner peripheral surface of the fixing ring 13 are in point contact. It is also possible to configure so as to.

  Furthermore, in the above-described embodiment, the seal body 30 is mounted on the stepped portion 24 provided in each annular body 23 so that the pair of annular bodies 23 are arranged to face each other with a gap 42. 23 does not need to be provided with the stepped portion 24. In short, when the sealing body 30 is sandwiched between the pair of annular bodies 23 and the fixing ring 13 is rotated, the annular bodies 23 are pressed by the annular bodies 23 when they approach each other, and are radially inward. What is necessary is just to be comprised so that it may bulge out and may press-contact with the outer peripheral surface of the pipe body X. FIG.

  Moreover, in the said embodiment, although the shape of the recessed part 31 of the sealing body 30 was formed in the cross-sectional substantially V shape, this invention is not limited to this at all, for example, the cross-section is substantially U-shaped. You may form in a shape. However, the concave portion 31 may be formed in the seal body 30 as necessary, and may be omitted. In addition, the specific dimension setting of each part of the sealing body 30 is not limited to this embodiment.

  Furthermore, the pipe joint structure according to the present invention is particularly useful when the joint body 1 has the branch part 3 as in the above embodiment, but the present invention does not have the branch part 3. Of course, the present invention can also be applied to the joint main body 1 constituted only by the portion 2.

  In addition, the specific configuration such as the shape of the joint body 1 and the fixing ring 13 and the material of the annular body 23 can be arbitrarily changed within the intended scope of the present invention.

<Second embodiment>
In addition to being applicable to the pipe joint as in the first embodiment, the pipe joint structure according to the present invention can also be applied as follows. Hereinafter, the slab provided with the pipe joint structure Y will be described with reference to FIGS. 12 and 13. In addition, about the part which is common in 1st embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  Z shown in FIG. 12 includes a main body 52 in which an inflow portion 50 and an outflow portion 51 corresponding to the straight pipe portion 2 and the branch portion 3 of the joint main body 1 are formed, and the inflow portion 50 and the outflow portion 51. It consists of the joint structure Y of the provided pipe body. An inspection port 53 is formed in the upper part of the main body 52.

  Further, Z shown in FIG. 13 is one in which an inflow portion 50 and an outflow portion 51 are formed so as to face the side portion of the main body 52, and the inflow portion 50 and the outflow portion 51 have a pipe joint structure. Y is provided respectively. An inspection port 53 is formed in the upper part of the main body 52.

  As described above, even when the joint structure Y of the tubular body is applied, the same effect as described above can be obtained.

  In this case, the specific configuration such as the shape is not limited as in the above embodiment.

  As described above, the present invention is useful for pipe joints and masts.

It is sectional drawing which shows one Embodiment of the joint structure of a tubular body. It is a front view which shows a part of joint body. It is sectional drawing which shows the state which attached the fixing ring to the coupling main body. (A) is a top view of a fixing ring, (b) is the sectional drawing. (A) is a top view of a stopper, (b) is the front view. (A) is a top view of an annular body, (b) is the sectional view. It is sectional drawing which shows the state which mounted | wore the annular body with the seal body. It is sectional drawing which shows the state which mounted | wore the annular body with the seal body. It is sectional drawing which shows the state which inserted the pipe body in the coupling. It is sectional drawing which shows the state which inserted and fixed the pipe body to the coupling. It is a front view which shows the use condition of a coupling. It is sectional drawing which shows one Embodiment. It is sectional drawing which shows another one Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Joint body 13 Fixing ring 23 Annular body 24 Step part 29 Annular convex part 30 Sealing body 31 Concave part 42 Gap 52 Mass body X Tube body

Claims (8)

A fitting body into which the pipe is inserted;
A fixing ring that is inserted into the tube body and attached to the joint body by a rotating operation;
A pair of annular bodies each inserted through the tubular body, fitted into the fixing ring so as to be separated from each other in the longitudinal direction of the tubular body, and rotatable relative to the fixing ring;
When the fixing ring is rotated by being sandwiched between the annular bodies, the annular bodies are pressed by the annular bodies when they approach each other, and bulge inward in the radial direction so that the outer periphery of the tubular body A substantially annular sealing body that can be pressed against the surface;
A joint structure for a tubular body, comprising: On the outer peripheral surface of the annular body, an annular convex portion that contacts the inner peripheral surface of the fixing ring is provided.
The joint structure of a tubular body according to claim 1. A step is formed on the inner peripheral surface of the annular body,
The seal body is mounted on a step portion of the annular body, and the annular bodies are configured to be opposed to each other with a gap.
The joint structure for a tubular body according to claim 1 or 2. A concave portion is formed in the circumferential direction on the outer peripheral surface of the seal body.
The joint structure for a tubular body according to any one of claims 1 to 3. The annular body is formed of a resin material having a low coefficient of friction.
The pipe joint structure according to any one of claims 1 to 4. The annular body is formed of Duracon,
The joint structure for a tubular body according to any one of claims 1 to 5.   A pipe joint comprising the pipe joint structure according to any one of claims 1 to 6. A pipe joint structure according to any one of claims 1 to 6,
A main body provided with a joint structure of the tube,
It is characterized by comprising.

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