JP5166173B2 - Connection port receiving structure and pipe fittings including the same, pipes - Google Patents

Description

  The present invention relates to a pipe joint widely used for water supply piping, drainage / sewage piping, and the like, and a pipe connection portion receiving structure and an article provided with the same.

  Conventionally, water supply pipes, drainage / sewage pipes are made using pipe joints, pipes, etc., and the connection part is mainly known as an adhesive type, a rubber ring type, a spherical free type or the like. These are piped by connecting one connecting portion receiving port to the other connecting portion connecting port, for example, a connecting port of a pipe joint, an additional connecting port, or a connecting port of a pipe. In the case of the adhesive type, an adhesive is applied and bonded, and in the case of the rubber ring receiving type, a lubricant is applied and these gaps are inserted into the receiving opening and bonded. Hereinafter, a pipe joint outlet, a mass outlet, or a pipe outlet is collectively referred to as a “tube”. Moreover, it may be piped using the mechanical pipe joint which can be joined without apply | coating an adhesive agent or a lubricant.

  Conventionally, there are, for example, the following as the connection portion receiving structure. 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 branch joint, and forms two annular grooves with a predetermined interval on the inner peripheral surface of the branch joint, and A rubber ring is attached to the annular groove. The drain pipe is piped through the branch joint, and is connected so as to be rotatable about the axis.

As described above, since the branch joint is rotatable with respect to the drain pipe, by appropriately rotating the branch joint, for example, by changing the layout or renewing after installing the pipe, the installation location of the drainage equipment, etc. It is possible to flexibly cope with the change of.
JP 2003-253717 A

  However, in the conventional connection port receiving structure described above, 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 receiving port are connected. Is set smaller than. For this reason, the work of inserting the drain pipe into the branch joint has become very troublesome. In particular, piping work indoors, such as under the floor, performed in a situation where there is not enough piping space, is extremely complicated and burdensome to the operator.

  Further, in the above-mentioned conventional one, since frictional force is generated between the drain pipe and the rubber ring, if the insertion force generated when the drain pipe is inserted into the receiving port is reduced, the mounting work is facilitated. The sealability between the rubber ring and the outer peripheral surface of the drain pipe cannot be secured sufficiently. In addition, since there is no particular means for preventing the drain pipe from being detached from the branch joint, the drain pipe will be inadvertently detached from the branch joint only by the pressure contact force of the rubber ring against the drain pipe. There was also a problem. On the other hand, in order to improve the sealing property and prevent the separation, it is possible to further increase the frictional force between the drain pipe and the rubber ring by setting the inner diameter of the rubber ring smaller. However, according to this, since the insertion force when inserting the drain pipe into the receiving port becomes large, the mounting operation becomes troublesome. In particular, mounting work under the floor is difficult.

  Furthermore, there is a drawback that the good sealing state between the rubber ring and the outer peripheral surface of the drain pipe is easily damaged by the rotation operation of the branch joint when the layout of the pipe is changed, and there is also a problem that the circulating fluid leaks from the joint portion. Had. As described above, there are also problems in maintenance and management.

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

  In order to solve the above-described problems, the present invention provides a connection portion main body into which a tubular body is inserted, a fixing ring attached to the connection portion main body, and at least one of the fixing ring and the connection portion main body. A pressing body that is provided inside and outside the tube body and receives a force in a tube axis direction from the fixing ring when the fixing ring is attached to the connection body, and the fixing ring and the connection body At least one of the inner side and the outer side of the pipe body is compressed by receiving a force in the pipe axis direction by the pressing body, and bulges inward in the radial direction of the pipe body, and the outer peripheral surface of the pipe body A seal body that is pressed against the outer periphery of the tube body, and the seal body, the pressing body, and the tube body rotate together with respect to the connection portion main body when the seal body is in pressure contact with the outer peripheral surface of the tube body. It is configured to obtain.

  In such a connection portion receiving structure, a tube to be connected is first inserted into a connection portion main body (for example, a connection portion receiving port). At that time, the tube body and the seal body are in a state before pressure contact, and the tube body can be inserted into the connection portion main body without being brought into contact with the seal body. In this state, the fixing ring is attached to the connection portion main body. When the fixing ring is mounted, the pressing body receives a force in the tube axis direction from the fixing ring. Further, the seal body receives the force in the tube axis direction from the pressing body and is compressed, and the seal body bulges inward in the radial direction of the tube body. As a result, the seal body comes into pressure contact with the outer peripheral surface of the tube body, and a seal between them is achieved. Further, in such a connection state, the seal body, the pressing body, and the tube body can be integrally rotated with respect to the connection portion main body.

  Therefore, for example, in the case of having a branching portion on the side of the joint body, when the installation location of the water supply / drainage equipment is changed by changing the layout after piping construction, by rotating the joint body to a desired position, A new pipe can be connected to the branch portion. That is, it is possible to respond quickly and flexibly to layout changes after the construction of piping.

  On the other hand, when the tubular body is detached from the connection portion main body, the fixing ring may be detached from the receiving port of the connection portion main body. Thereby, the force in the tube axis direction acting on the pressing body from the fixing ring is released, and the force in the tube axis direction acting on the seal body from the pressing body is released. As a result, since the inner diameter of the seal body is increased and the pressure contact state with the tube body is released, the tube body can be detached from the connection portion main body.

  As described above, the tube body and the connecting portion main body can be connected to or detached from each other by a simple operation of attaching and detaching the fixing ring. For this reason, a series of connection and disconnection operations can be easily performed without imposing a burden on the operator.

  It is also possible to provide a stopper that prevents the fixing ring from being detached from the connection portion main body.

  According to this, since the connection portion main body and the fixing ring are firmly fixed by the stopper, inadvertent removal of the fixing ring can be reliably prevented. As a result, a good connection state between the connection portion main body and the pipe body can be maintained.

  Furthermore, you may comprise the said press body with a pair of annular body which pinches | interposes a sealing body from the both sides of a pipe-axis direction.

  According to this, by attaching the fixing ring to the connection portion main body, a force in the tube axis direction acts on the pair of pressing bodies made of an annular body. Furthermore, the seal body receives a force in the tube axis direction from both sides by the pressing body, and bulges inward in the radial direction of the tube body. Thereby, a seal body is press-contacted to the outer peripheral surface of a tubular body.

  Further, in order to attach the fixing ring to the connection portion main body, an engagement groove is formed on either the outer peripheral surface of the connection portion main body or the inner peripheral surface of the fixing ring, and can be engaged with the engagement groove. You may form an engagement convex part in the other one of the outer peripheral surface of the said connection part main body, or the inner peripheral surface of a fixing ring.

  According to this, the engagement protrusion formed on either the connection portion main body or the fixing ring is engaged with the engagement groove formed on either the connection portion main body or the fixing ring, and the fixing ring is connected to the connection portion. Mounted on the main body. Since the engagement / disengagement operation between the engagement groove and the engagement convex portion is very simple, it contributes to an increase in work efficiency at the site.

  Furthermore, an annular concave portion may be formed in the circumferential direction on the outer peripheral surface of the seal body, and the radial height of the pressing surface of the pressing body may be set so as to be equal to or less than the depth of the concave portion.

  According to this, since the height in the radial direction of the pressing surface of the pressing body is set to be a dimension equal to or smaller than the depth of the concave portion of the sealing body, the side end surface portion located on the side of the concave portion Only the force from the pressing body acts on the surface. Upon receiving such force, the seal body is deformed so that the concave portion thereof is closed, and bulges inward in the radial direction and is pressed against the outer peripheral surface of the tube body.

  In this case, the tube body can be connected to the connection portion main body without applying a great force to the fixing ring, and the burden on the operator is reduced.

  Moreover, the pipe joint according to the present invention is provided with at least one connection portion receiving structure.

  Further, according to the present invention, at least one of the connection part receiving structures is provided.

  Furthermore, the pipe according to the present invention is provided with at least one connection portion receiving structure.

  According to the present invention, it is possible not only to easily attach and detach the pipe body, but also to maintain a good connection state thereof, and to quickly and flexibly cope with a situation in which the layout of the pipe is changed.

<First embodiment>
Hereinafter, the best mode for carrying out the connection port receiving structure according to the present invention will be described with reference to the drawings.

  FIG. 1 is a front view including a partial cross section showing a pipe joint according to the present embodiment. Reference numeral 1 in the drawing is a transparent joint body provided with a branch part 3 on the side surface of the straight pipe part 2, and a transparent connection part body having a flange part 4 on the distal end side of the straight pipe part 2 and the branch part 3. 5 are provided. In addition, the connection part main body 5 may be comprised separately from the joint main body 1, and the joint main body 1 etc. do not necessarily need to be transparent.

  As shown in FIG. 2, the notch 6 is formed with three notches 6 at a predetermined interval. Further, on the outer peripheral surface of the connection portion main body 5, three engagement grooves 7 are provided with a predetermined interval as shown in the figure. The engaging groove 7 includes an insertion portion 8 formed in the tube axis direction, a first straight portion 9 provided perpendicularly to the insertion portion 8 in the circumferential direction, and a fixing ring 13 to be described later on the connection portion main body 5 side. In order to make it approach, the inclination part 10 which has the predetermined angle provided in a row with this 1st linear part 9, and the 2nd linear part 11 of the circumferential direction provided in a line with this inclination part 10 are comprised. At the back of the second linear portion 11, a convex portion 12 having a curved surface as a reverse rotation preventing means is bulged. Reference numeral 40 denotes a convex portion having a tapered surface 41 as shown in FIGS. 3 and 4. The tapered surface 41 is inclined so as to descend toward the insertion side of the insertion portion 8 of the engagement groove 7 (the lower side in FIGS. 2 and 4 and the right side in FIG. 3).

  As shown in FIG. 5, reference numeral 13 denotes a fixing ring that is attached to the connection portion body 5 of the joint body 1. The fixing ring 13 is used for connecting the tube body X to the connecting portion main body 5 by pressing a seal body 30 to be described later against the outer peripheral surface of the tube body X by the rotation operation. Three engaging projections 14 slidably engaged with the engaging grooves 7 (see FIG. 3) of the connection portion main body 5 have a predetermined interval on the inner peripheral surface of the fixing ring 13 at one end side. Is provided. When the fixing ring 13 is attached to the connection portion main body 5, the taper surface 41 and the convex portion 40 provided with the engagement convex portion 14 of the fixing ring 13 in the insertion portion 8 of the engagement groove 7 of the connection portion main body 5 are provided. It is inserted into the insertion portion 8 so as to get over. Thereby, the integrity of the fixing ring 13 and the connecting portion main body 5 is maintained. For this reason, if it is manufactured up to this state in advance in a factory or the like, it is possible to simplify the transportation work to the site and the connection work at the site, and the working 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 connection portion main body 5 as described above, and may be configured to be removable.

  Moreover, since the said insertion part 8 is formed in the pipe-axis direction, insertion of the engagement convex part 14 to this insertion part 8 can be performed easily. For this reason, the engagement convex part 14 can be guide | induced appropriately to the 1st linear part 9, and the rotation operation of the fixing ring 13 can be performed favorably. Furthermore, the movement distance of the fixing ring 13 toward the connection portion main body 5 can be ensured by the movement of the engagement convex portion 14 in the insertion portion 8. For this reason, it is not necessary to set the inclined portion 10 at a steep angle or to secure its length more than necessary, and there is an advantage that the connecting portion main body 5 can be made compact.

  In addition, when the engaging convex part 14 of the fixing ring 13 moves through the first linear part 9, the inclined part 10 and the second linear part 11 of the engaging groove 7, the fixing ring 13 is as shown in FIG. They are set to rotate 10 °, 40 ° and 10 °, respectively. In this case, if the inclination angle of the inclined portion 10 is set large, the fixing ring 13 can be fixed to the connecting portion main body 5 (joint main body 1) with a small rotational operation. On the other hand, if the inclination angle of the inclined portion 10 is set small, the fixing ring 13 rotates smoothly without difficulty. Therefore, the inclination angle of the inclined portion 10 is determined in consideration of such points. In the present embodiment, the engaging projection 14 is set so that the fixing ring 13 approaches the connecting portion main body 5 (joint main body 1) by 2.5 mm by slidingly moving the inclined portion 10. The inclination angle α with respect to the circumferential direction of the inclined portion 10 is about 4 °. When the engaging protrusion 14 of the fixing ring 13 is engaged with the protrusion 12 of the engaging groove 7 and the fixing ring 13 is fixed to the connecting portion main body 5 of the joint main body 1, the flange 4 of the connecting portion main body 5. And the end face of the fixing ring 13 are configured to contact each other without a substantial gap (see FIGS. 12 and 13). If comprised in this way, even if it is a case where the force of bending is added to the connected pipe body, the intensity | strength of a connection part receptacle can be ensured.

  As shown in FIG. 5, 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 notches 16 are provided so that when the engaging convex portion 14 of the fixing ring 13 is moved to the terminal end of the second straight portion 11 of the engaging groove 7 of the connecting portion main body 5, the flange portion of the connecting portion main body 5 is provided. It is formed at a position that coincides with the four notches 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.

  In FIG. 1, reference numeral 18 denotes a stopper that is slidably fitted to the fixing ring 13. As shown in FIG. 6, the annular stopper body 19 has three locking pieces 20 projecting upward in the drawing with a predetermined interval. The number of the locking pieces 20 can be changed. For example, as shown in FIG. 7, the locking piece 20 may be constituted by a single locking piece 20, and according to this, the flange 4 of the connecting portion body 5 and the fixing portion 20 are fixed. It is desirable that the number of the notches 6 and 16 provided in the flange portion 15 of the ring 13 is appropriately changed. 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 flange part 4 through the notch 16 of the fixing ring 13, and the engaging part 21 is engaged with the flange part 4 to prevent reverse rotation of the fixing ring 13. To do. As shown in FIG. 5B, reference numeral 22 denotes a tape as a mark adhered to the outer peripheral surface of the fixing ring 13. Based on whether or not the mark 22 is exposed to the outside, whether or not the engaging portion 21 of the stopper 18 is engaged with the joint body 1 (the flange portion 4 of the connecting portion body 5) is visually observed from the outside. Can be confirmed. 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 connection portion main body 5, the tape 22 or the like may be hidden by the stopper main body 19. In addition, as shown in FIG. 8, the stopper main body 19 can also be cut | disconnected and formed in a substantially C shape.

  As shown in FIGS. 9 and 10, reference numeral 23 denotes a pair of pressing bodies that are rotatably fitted inside the fixing ring 13. As shown in FIG. 9, an outer step portion 24 and an inner step portion 25 are provided on the inner peripheral surface on one end side of the pressing body 23. The outer step portion 24 includes a peripheral surface portion 26, a taper portion 27, and an inner wall portion 28. Further, two annular convex portions 29 are provided on the outer peripheral surface of the pressing body 23 at a predetermined interval in the tube axis direction. 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 pressing body 23 is rotatably fitted inside the fixing ring 13. Moreover, the thickness, hardness, etc. of the press body 23 are not ask | required, For example, it can also form in a sheet form. Furthermore, you may comprise the press body 23 by the front substantially C-shape which has a notch in part, or the split ring divided | segmented into plurality.

  Reference numeral 30 denotes a rubber seal body fitted to the outer step portion 24 so as to be disposed between a pair of pressing bodies 23 arranged to face each other as shown in FIG. In this state, a gap 42 is formed between the pressing 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. In the present embodiment, the pair of pressing bodies 23 and the seal body 30 described above constitute an annular seal structure K.

  As shown in FIG. 11, the depth A of the concave portion 31 of the seal body 30 is such that A> B with respect to the height B that combines the tapered portion 27 and the inner wall portion 28 of the pressing body 23. Is set. In this case, A = B may be set. Further, the angle Θ with respect to the tube axis direction of the tapered portion 27 of each pressing body 23 is set to 45 °, which is the same angle. In a state where the seal body 30 is mounted on the pair of pressing bodies 23, the gap width C between the end surfaces of the opposing pressing bodies 23 is smaller than the width D of the concave portion 31 of the sealing body 30. Further, a gap width E formed by the end face of the seal body 30 and the step portion 25 inside the pressing 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 pressing body 23, and the inner diameter G of the pressing body 23 is set slightly larger than the outer diameter of the tube to be connected. ing. The pressing body 23 is made of a synthetic resin such as Duracon, and the connection body 5 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 surface of the connection portion main body 5 as shown in FIG. When the fixing ring 13 is attached to the connection portion main body 5, the back surface of the pressing body 23 located inside contacts the end surface of the connection portion main body 5, and sealing is achieved by the O-ring 32. 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 a water supply pipe, a drain pipe, etc. are piped using this pipe joint is demonstrated.

  First, the tube body X to be connected to the connection portion receiving port 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 pressing body 23, and the inner diameter G of the pressing body 23 is set larger than the outer diameter of the tube X to be connected, In addition, since the gap width E formed by the end face of the seal body 30 and the step portion 25 inside the pressing 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. 12, the fixing ring 13 and the stopper 18 are attached to the connection portion main body 5, the pressing body 23 and the seal body 30 are fitted to the inner peripheral surface of the fixing ring 13, and the tube body X is inserted. In this state, the fixing ring 13 is pressed toward the joint main body 1 side (connection portion main body 5 side), and the engaging convex portion 14 of the fixing ring 13 is moved to the end of the insertion portion 8 of the engaging groove 7. At that time, since the outer pressing body 23 is pressed by the annular convex portion 17 of the fixing ring 13, the pair of pressing bodies 23 and the seal body 30 are integrated into the joint main body 1 side (the connection main body 5 side). It moves, and the back surface of the inner pressing body 23 comes into contact with the end surface of the connection portion main body 5.

  Further, when the fixing ring 13 is rotated, as shown in FIG. 13, the engaging convex portion 14 slides on the second linear portion 11 via the first linear portion 9 and the inclined portion 10 of the engaging groove 7. It moves over the convex part 12 provided in the two straight line parts 11 to the terminal end. In this case, since the convex part 12 is formed in a curved surface shape, the convex part 12 and the engaging convex part 14 of the fixing ring 13 can be smoothly engaged and disengaged. In addition, since the worker can recognize this engagement / disengagement state by the touch when the fixing ring 13 rotates, the certainty of the work is improved.

  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 via the outer pressing body 23. At that time, since the movement of the inner pressing body 23 is restricted by the connecting portion main body 5 of the joint body 1, the seal body 30 is compressed and bent, and bulges inward so that its inner diameter F is reduced. Thus, the outer peripheral surface of the tube body X is pressed.

  In this case, the compression of the sealing body 30 is performed by the tapered portion 27 and the inner wall portion 28 (pressing surface) of the stepped portion 24 outside the pressing body 23. The height B of the pressing surface combined with the inner wall portion 28 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.

  Moreover, since the angle Θ with respect to the tube axis direction of the tapered portion 27 of each pressing body 23 is set to 45 °, the compression force is applied to the sealing body 30 from each pressing body 23 approximately evenly, resulting in bias. 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.

  Furthermore, since the gap width C between the end faces of the opposing pressing bodies 23 is smaller than the width D of the concave portion 31 of the sealing body 30 in a state where the sealing bodies 30 are mounted on the pair of pressing bodies 23, The body 30 does not bulge outward from between the pressing 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.

  In addition, after the seal body 30 is pressed against the tube X, the seal body 30 and the tube X cannot be rotated integrally by the press contact, and can rotate between the fixing ring 13 and the pressing body 23. become. Since the fixing ring 13 is in contact only with the two annular projections 29 of each pressing body 23 and the pressing body 23 is made of a slippery duracon, it can be easily rotated. Therefore, the joint main body 1 and the tube X rotate relatively. Therefore, it becomes easy to work.

  Thereafter, the locking piece 20 of the stopper 18 is slid to the connection portion main body 5 side to engage the locking piece 20 into the notch 6 of the flange portion 4, and the engagement portion 21 is connected to the flange portion of the connection portion main body 5. 4 is engaged. 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. Thereby, a series of connection work of the tube X is completed. Such a series of connection work has the advantage that it can be performed very easily. For this reason, a series of connection work can be performed efficiently without burdening the operator even in situations where the work space is limited, such as underfloor piping. It can be performed. Further, since the joint body 1 and the like are transparent, the mounting state of the O-ring 32 and the insertion state of the tube body X can be easily visually confirmed from the outside.

  Furthermore, the tube X connected in this way is engaged with the engagement between the projection 12 provided in the engagement groove 7 of the connection portion main body 5 and the engagement projection 14 of the fixing ring 13 and the flange of the stopper 18. The reverse rotation is prevented by engaging the 4 in 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.

  Further, in this state, since the fixing ring 13 and the pressing body 23 are rotatably fitted, the joint body 1 can be rotated with respect to the tube body X.

  Therefore, when the installation location of the water supply / drainage device is changed due to a layout change or the like after the pipe construction, for example, when the arrangement of the pipe body 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.

  On the other hand, when the pipe body X is removed from the pipe joint, the stopper 18 is slid in the pipe body X side, that is, in the direction away from the connection body 5 (right direction in FIG. 12), While releasing the engagement state of the connecting portion main body 5 with the flange portion 4, 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 mark 22 is concealed by the stopper body 19 of the stopper 18.

  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 engaging groove 7 of the connection portion main body 5 is formed in a curved surface shape. The engagement state between the projection 12 and the engagement projection 14 of the fixing ring 13 is released. Further, the fixing ring 13 is rotated to a position (original position) where the engaging convex portion 14 is opposed to the convex portion 40 provided in the insertion portion 8 of the engaging groove 7.

  In addition, since the engagement convex part 14 moves the inclined part 10 of the engagement groove 7 in the reverse direction, the pressing force from the outer pressing body 23 is removed, so that the inner diameter F of the sealing body 30 increases. 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 pipe joint.

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

<Second embodiment>
The connection port receiving structure according to the present invention can also be applied as follows. Hereinafter, the mast provided with the connecting portion receiving port Y will be described with reference to FIGS. 15 and 16. 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. 15 includes a main body 52 formed with an inflow portion 50 and an outflow portion 51 corresponding to the straight pipe portion 2 and the branch portion 3 of the joint body 1, and the inflow portion 50 and the outflow portion 51. It consists of a connection port Y provided. An inspection port 53 is formed in the upper part of the main body 52.

  Further, Z shown in FIG. 16 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 are connected to the connection portion receiving port Y. Are provided. An inspection port 53 is formed in the upper part of the main body 52.

  As described above, even when the connection portion receiving port Y is applied to the first position, the same effect as described above can be obtained.

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

<Third embodiment>
The connection port receiving structure according to the present invention can also be applied to a pipe. As shown in FIGS. 17 and 18, the connection portion receiving port Y is common to the above embodiment, and thus the description thereof is omitted. In the embodiment shown in FIG. 16, the connection portion receiving port Y is manufactured separately and integrated with the end of the pipe body 60 by bonding. The embodiment shown in FIG. The body is inserted and bonded to the end of the pipe body 60. When using as such pipes and pipe fittings, if you apply a refractory agent such as mortar to the surface of the connection receptacle or pipe body, it will also have fire resistance performance, so its application range Has the advantage of spreading.

  In the above-described embodiment, the pair of pressing bodies 23 are arranged so as to be accommodated in the fixing ring 13. For example, as shown in FIG. 19, they are arranged in the connection portion main body 5 of the joint main body 1. May be. The main configuration is substantially the same as that of each of the above embodiments. However, as shown in FIG. 20, the connecting portion main body 5 is extended in the tube axis direction, and a cylindrical portion 5a that can accommodate the pressing body 23 is extended. Is different.

  If comprised in this way, the intensity | strength with respect to the force of the bending which acts on the connection part main body 5 via the pipe body X is securable. As a result, it is possible to satisfactorily avoid a situation in which the sealing performance is inadvertently impaired and the circulating fluid leaks. Furthermore, there is an advantage that the pressing body 23 and the sealing body 30 are protected in a double structure by the fixing ring 13 and the tubular portion 5a.

  In this case, it is also possible to form the cylindrical portion 5a so as to be short in the tube axis direction so that the pressing body 23 is accommodated inside both the connection portion main body 5 and the fixing ring 13. is there.

  Moreover, in each said embodiment, the stopper 18 for preventing the detachment | leave of the fixing ring 13 from the coupling main body 1 is employ | adopted. However, even if the stopper 18 is not provided, the stopper 18 is not necessarily provided because the means for preventing the fixing ring 13 from being detached from the joint body 1 is additionally provided. However, when the stopper 18 is employed, for example, as shown in FIG. 21, the locking piece 20 can be formed in a rod shape having an elliptical cross section.

  For example, the following can be considered as means for fixing the fixing ring 13 to the joint body 1 regardless of the presence or absence of the stopper 18. That is, as shown in FIG. 22 (a), there is one that fixes the flange portion 4 of the connection portion main body 5 and the flange portion 15 of the fixing ring 13 with a fastener 72 including a bolt 70, a nut 71, and the like. Further, as shown in FIG. 4B, a stopper piece 73 having a substantially L-shaped cross section is rotatably provided on the flange portion 15 of the fixing ring 13, and a convex portion 74 provided on the distal end side of the stopper piece 73. It is also possible to provide a recess 75 that can be fitted to the flange portion 4 of the connection portion main body 5. Further, as shown in FIG. 23 (a), an uneven portion 76 is formed in an annular shape on the outer peripheral surface of the connection portion main body 5, and an annular uneven portion 77 is formed on the inner peripheral surface of the fixing ring 13. May be. In this case, the fixing ring 13 is pressed, and the uneven portion 77 is fitted to the uneven portion 76 of the connecting portion main body 5 and attached. Further, as shown in FIG. 5B, a plurality of stopper pieces 78 having a substantially U-shaped cross section are provided on the collar portion 15 of the fixing ring 13 so as to be rotatable. You may comprise so that the part 15 and the collar part 4 of the connection part main body 5 may be fixed in a press-contact state. Further, as shown in FIG. 5C, a clip 79 made of a spring piece or the like having a substantially U-shaped cross section is externally fitted to the flange portion 15 and the flange portion 4 of the connection portion main body 5 so as to be in pressure contact with each other. It may be fixed.

  Further, in the above embodiment, the stopper 18 is configured to be mounted from the insertion direction of the tube X. However, as illustrated in FIG. 24, the stopper 18 may be mounted from the opposite direction L. It is. This is useful when, for example, a work space cannot be secured on the tube X side.

  Moreover, the pressing body 23 does not necessarily need to be configured in a pair as in the above embodiment.

  Further, unlike each of the above embodiments, the engagement convex portion 14 is formed on the outer peripheral surface side of the connection portion main body 5 as shown in FIG. 25 (a), and the fixing ring 13 as shown in FIG. 25 (b). The engagement groove 7 may be formed on the inner peripheral surface side.

  Further, as shown in FIG. 26, the engaging groove 7 of the connecting portion main body 5 is constituted only by the insertion portion 8 in the tube axis direction, and the engagement convex portion 14 of the fixing ring 13 is prevented from being detached from the engaging groove 7. As a means, a recess 80 that fits the engagement protrusion 14 may be formed in the back of the engagement groove 7. In this case, the fixing ring 13 is attached by pressing in the tube axis direction. According to this, there is an advantage that the mounting operation can be easily performed as compared with the case of the above embodiment. In this case as well, the engaging convex portion 14 may be formed in the connecting portion main body 5 and the engaging groove 7 may be provided in the fixing ring 13 as in the above embodiment.

  Furthermore, in the above embodiment, the concave portion 31 is formed on the outer peripheral surface of the seal body 30, and the radial height B of the pressing surface of the pressing body 23 is set so as to be equal to or less than the depth A thereof. ing. However, the present invention is not limited to this. For example, the seal body 30 is configured by a general O-ring that does not have the concave portion 31, or an annular uneven portion (not shown) is provided in the circumferential direction on the inner peripheral surface of the seal body 30 having the concave portion 31. It does not matter if it is formed.

  FIG. 27 shows a seal body 30 formed of an O-ring. In this case, the seal body 30 is compressed by the connection ring body 5 of the fixing ring 13 and the joint body 1, and the seal body 30 is pressed against the outer peripheral surface of the tube body X.

  Furthermore, the connection portion receiving structure according to the present invention is particularly useful when the joint body 1 has the branch portion 3 as in the above embodiment, but the present invention does not have the branch portion 3. Of course, the present invention can also be applied to the joint main body 1 constituted only by the portion 2. Furthermore, the present invention can be applied to connection parts of pipe joints such as sockets, elbows, cheeses, and incrementers which are generally called. In addition, it does not prevent connecting a pipe to the inflow side connection part using the pipe joint which has the said connection part receptacle.

  In addition, specific configurations such as the shapes of the joint body 1 and the fixing ring 13 can be arbitrarily changed within the intended scope of the present invention.

  As described above, the present invention is useful as a connection portion receiving structure that is pipe-connected to a tubular body.

It is sectional drawing which shows one Embodiment of a connection part receptacle structure. 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 connection part main body. It is a front view which shows the engaging groove of a connection part 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. The other embodiment of a stopper is shown, (a) is a top view, (b) is the front view. The other embodiment of a stopper is shown, (a) is a top view, (b) is the front view. (A) is a top view of a press body, (b) is the sectional drawing. It is sectional drawing which shows the state which attached the sealing body to the press body. It is sectional drawing which shows the state which attached the sealing body to the press body. It is sectional drawing which shows the state which inserted the pipe body in the pipe joint. It is sectional drawing which shows the state which inserted and fixed the pipe body to the pipe joint. It is a front view which shows the use condition of a pipe joint. It is sectional drawing which shows one Embodiment. It is sectional drawing which shows other embodiment. It is sectional drawing which shows one Embodiment of a pipe. It is sectional drawing which shows other embodiment of a pipe. It is sectional drawing which shows the fixed state of the pipe joint and pipe body which concern on other embodiment. It is a front view which shows the connection part main body which concerns on other embodiment. The other embodiment of a stopper is shown, (a) is a top view, (b) is the sectional drawing. (A) And (b) is sectional drawing which shows the state which the connection part main body and the fixing ring fixed. (A), (b) and (c) is sectional drawing which shows the state which the connection part main body and the fixing ring fixed. It is sectional drawing which shows the fixed state of the pipe joint and pipe body which concern on other embodiment. (A) is a front view of the connection part main body which concerns on other embodiment, (b) is sectional drawing of the fixing ring. It is a front view of the connection part main body which concerns on other embodiment. It is sectional drawing which shows the fixed state of the pipe joint and pipe body which concern on other embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Joint main body 5 Connection part main body 7 Engagement groove 13 Fixing ring 14 Engagement convex part 18 Stopper 23 Press body 30 Sealing body 31 Concave part X Pipe body Y Connection part receptacle

Claims (7)

A connection body into which the tube is inserted;
A fixing ring to be attached to the connection body;
A seal body provided on the inner side of at least one of the fixing ring and the connection portion main body and on the outer side of the tube inserted into the connection portion main body;
A pair that is provided on the inner side of the fixing ring and the connecting portion main body and on the outer side of the tubular body inserted into the connecting portion main body, and sandwiches the seal body from both sides in the tube axial direction of the tubular body inserted into the connecting portion main body. A pressing body made of an annular body of
With
The pressing body receives a force in the tube axis direction from the fixing ring when the fixing ring is attached to the connection portion main body,
The seal body is compressed by the pressure body in response to the force in the tube axis direction, bulges inward in the radial direction of the tube body inserted into the connection portion main body, and presses against the outer peripheral surface of the tube body. ,
In the state where the sealing member is pressed against the outer peripheral surface of the tube, the seal member, the pressing member and the tube can rotate relative to the connecting body together, connecting portions socket structure. The connection portion receiving structure according to claim 1 , further comprising a stopper that prevents the fixing ring from being detached from the connection portion main body. In order to attach the fixing ring to the connection portion body, an engagement groove is formed on either the outer peripheral surface of the connection portion main body or the inner peripheral surface of the fixing ring, and the engagement is engageable with the engagement groove. The connection part receiving structure described in Claim 1 or 2 with which the convex part was formed in either the other of the outer peripheral surface of the said connection part main body, or the inner peripheral surface of a fixing ring. The concave portion of the annular outer peripheral surface of the seal body is formed in the circumferential direction, 3 claim 1, the pressing surface radial height of the pressing member to be less than the depth of the concave portion is set The connection part receptacle structure described in any one of the above . The pipe joint provided with the connection part receptacle structure described in any one of Claim 1 to 4 . It is provided with the connection part receiving structure described in any one of claims 1 to 4 . The pipe provided with the connection part receptacle structure as described in any one of Claim 1 to 4 .

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