JP4434786B2 - Universal pipe joint - Google Patents

Description

  The present invention relates to a universal pipe joint.

  In general, a ball joint having a ball joint and capable of arbitrary rotation is also used in a pipe line, and has a partial spherical sliding surface, which can be angularly displaced (also referred to as free swing angular displacement). It is commonly called a ball pipe joint.

  Such ball pipe joints are also applied to synthetic resin pipes such as polyethylene and polyvinyl chloride, and are now commonly used as universal pipe joints.

  Such a universal pipe joint basically includes a universal pipe joint composed of a pair of shells (spherical bulges) having a partial spherical surface as a sliding surface, and a core (spherical surface) inscribed in the partial spherical shell. A universal pipe joint (for example, see FIG. 2 of Patent Document 1) composed of a lump member when forming the inner surface of the bulging portion, and a universal pipe joint in which a tubular body is inserted into the universal pipe joint composed of the pair of shells. (See, for example, Patent Document 2).

  The universal pipe joint comprising a core inscribed in the partial spherical shell will be further described.

  In FIG. 5A, reference numeral 50 denotes an ordinary universal joint. The universal joint 50 includes a partially spherical shell 51 and a core 52 inscribed in the shell 51. A differential port 53 that forms a pipe is integrally formed.

  The core 52 constitutes a rubber ring receiving port 55 in which a rubber ring 54 is fitted. A tubular body 62 forming a conduit is inserted into the rubber ring receiving port 55.

  In the figure, 56 is a watertight rubber ring, 57 is a receiving stopper, and 58 is a plurality of ribs on the outer surface of the core. In the figure, 16, 20.0, 82, 105, etc. indicate dimensions (millimeters).

In the universal pipe joint 50, the tube body 62 inserted in the rubber ring receiving port 55 can obtain a maximum swing angle θ of 15 degrees on one side with respect to the difference port 53 from the state where the tube axis a is horizontal. ing.
Japanese Patent No. 2843972 Japanese Utility Model Publication No. 61-17093

  If the universal pipe joint of any of the above-mentioned classifications is freely displaced, irregularities are generated on the inner surface of the pipe line, resulting in fluctuations in the cross-sectional area of the pipe. In particular, in the case described above, one connection portion of the universal pipe joint is For example, when the angle is displaced upward from the horizontal shape, there is a problem that a reservoir is generated on the bottom side of the pipe and a narrowed part of the pipe or the like protrudes on the top of the pipe.

  The universal pipe joint 50 having a nominal diameter of 150 mm shown in FIG. 5 will be further described.

  As shown in the figure, when the maximum swing angle θ of 15 degrees on one side is taken upward, the receiving stopper-57 side of the core 52 is separated downward from the bulging base portion 59 of the shell 51 on the bottom side of the conduit. As shown in FIGS. 4A and 4B, a reservoir 60 is formed that is surrounded by a combination of two bow shapes that are matched to each other in a plan view and a substantially triangular shape in a longitudinal sectional view.

  Further, on the pipe top side, the receiving stopper 57 of the core 52 protrudes from the bulging base part 59 of the shell 51 in a bird's-eye view, and a three month-like pipe narrowing part 61 is formed as shown in FIG. Is done.

  In order to solve such a problem, the present invention provides: 1) In a synthetic resin universal pipe joint having a partial spherical surface and having a free swing angle θ, the joint is measured by the displacement of the free swing angle θ and the joint strength. A first member to be supported, and a second member which is positioned on the inner diameter side of the first member and is displaced following the displacement of the free swing angle θ, and which has a substantially uniform tube cross-sectional area. And a synthetic resin universal pipe joint divided into a member, the first member being an outer shell having a spherical joint having a free swing angle θ, and an inner shell or an inner shell that slides on the inner surface of the outer shell. And the second member is configured not to carry joint strength by a plurality of spherical joint members, and the swing angle of the plurality of spherical joint members is freely adjustable by the first member. By making the angle smaller than the swing angle θ, these spherical joint members It is a flexible joint made of synthetic resin characterized in that it is formed on the pipe surface that is flattened with the unevenness due to the changing position being small, and 2) It has a partial spherical surface and can be displaced by a free swing angle θ. In the synthetic resin universal pipe joint, the joint is located on the inner diameter side of the first member that carries the displacement of the free swing angle θ and the joint strength, and the first member has a free swing angle θ. A synthetic resin that is divided into a second member that is provided on substantially the entire surface of the road and that displaces following the displacement of the free swing angle θ and that makes the tube cross-sectional area substantially uniform. As a universal pipe joint, the first member is constituted by an outer shell and an inner shell or an inner core having a spherical joint portion having a free swing angle θ, and the second member is configured by a free swing angle η = θ / n and a member having n spherical joints. 3. A synthetic resin universal pipe joint having a double spherical surface formed by the first and second members, and 3) The joint is used as a drain pipe, and mooring of filth is eliminated, respectively. This is the gist of the synthetic resin universal pipe joint.

  According to the above (1) of the present invention, the first member that strongly guides the free swing angle θ and the second member that is inside thereof and that makes the inner surface of the pipe line substantially uniform and smooth are clearly defined. Therefore, in addition to fulfilling the smooth sliding function of the universal pipe joint, the follower function of the second member in any swing angle state makes the pipe line a gentle curved surface, and consequently the curved pipe It can be compared with the pipe line state in which a plurality of single bodies are connected, that is, the unevenness of the straight pipe joint.

  In particular, since the second member forming the pipe line is located inside the first member carrying the joint strength, the displacement is small and the thin member which does not carry the joint strength can be constructed. Even if it is changed, the inner surface of the pipe is not easily uneven.

  According to the above (2), in addition to the above effects, the spherical joint portion of the second member is more than the spherical joint portion portion of the first member, so that the unevenness in the pipe line is dispersed accordingly, and as a whole Can be flattened.

  According to (3), the spherical joint portion of the second member forms a free swing angle θ in FIG. 1 and a pair of left and right rotation center axes with respect to the rotation center axis b orthogonal to the tube axis a. The two can be arranged in series with each other, so that it becomes a good unit for general-purpose drainage pipes and the structure can be simplified.

  The invention will be described in more detail by means of an embodiment shown in the accompanying drawings.

  FIG. 1 is a cross-sectional view of a first embodiment of the present invention (longitudinal cross-sectional view before a free change), FIG. 2 is an explanatory view of FIG. 1 (cross-sectional view showing a tube top and a tube bottom in a maximum swing angle state), FIG. 3 is a detailed explanatory view of FIG. 2, and FIG. 4 is a sectional view of the second embodiment.

  The first embodiment of the present invention is a PVC universal pipe joint 1 used for connecting PVC pipes to each other and a connection part between a PVC pipe and a PVC pipe, and one connection port (rubber ring receiving port) 4. And an outer shell 2 having a partially spherical surface and the other connection port (differential port) on the same straight tube axis a on the opposite side of the connection port 4 (or a universal pipe joint) And a core 3 that has a partial spherical surface integrated with an integrated main body connecting portion 5 and that does not directly form an inner pipe line. First and second fixing rings 6, 7 projecting from the respective pipe sides of the two shells, cores 2, 3 and facing each other, and the inner or outer surface of these fixing rings 6, 7. The movable ring 10 having the same spherical joint sliding on the first and second spherical joints 8, 9 formed in These rings 6, 7, 10 form a conduit with an inner diameter substantially the same as the inner diameter of the pipe inserted into the connection port 4 or the inner diameter of the connection port 5, and the shell, In accordance with the displacement of the maximum free swing angle θ of the cores 2 and 3, the free swing angle η is displaced.

In short, the inner and outer shells and the cores 2 and 3 constitute a first member that carries the displacement of the free swing angle θ while maintaining the joint strength. The two fixed rings 6 and 7 and the one movable ring 10 which form the substantially entire pipe line of the shell and the cores 2 and 3 and follow the displacement of the free swing angle θ constitute the second member. Since the universal pipe joint 1 is composed of the first and second members that are shared, the universal pipe that forms a double spherical surface at each spherical joint of the shell, the cores 2 and 3 and the rings 6, 7, and 10. Can be a joint 1, and as a result,
(B) The spherical joint member on the inner diameter side is a thin ring body, and even if a plurality of them are arranged in series, the unevenness is not increased.

  (B) Even if the number of spherical joining members on the inner diameter side is increased and freely displaced, unevenness can be dispersed accordingly.

  (C) The free swing angle η of the spherical joint member on the inner diameter side can be made smaller than θ, and the unevenness caused by η can be made small.

(D) Since the spherical joint member on the inner diameter side includes two fixing members, even if the swing angle η is displaced, the fixing member does not enter or exit the conduit side in a fixed state. Does not occur.
From these effects, the inner surface of the pipe can be made substantially the same diameter or flattened together.

  In other words, the free swing angle η formed by sliding at the spherical joints 8 and 9 of the three rings 6, 7, and 10, when the number of the spherical joints 8 and 9 is n, The free swing angle θ of the cores 2 and 3 becomes a value that is gradually reduced by n, and as a result, the effects (b) and (c) are exhibited.

  Next, the detailed configuration and effects of the universal pipe joint 1 of the present embodiment will be described.

  When the polyvinyl chloride free pipe joint 1 of the present embodiment is used for a drainage facility having nominal diameters of 75 mmφ, 100 mmφ, 150 mmφ, and 200 mmφ, for example, even if the swivel angle θ is large, two slightly Only the sewage reservoirs 11 and 12 are formed, and the convex portion is not formed on the top side of the pipe line.

  The quantitative size of the two small trash reservoirs 11 and 12 will be described later as a specific effect of this embodiment.

  The outer shell 2 and the rubber ring receiving groove 13 are formed by injection molding or blow molding by a cold parison method.

  A first fixing ring 6 on which a rubber ring receiving stopper 14 is formed is fitted into the swollen base portion of the shell 2 and fixed with an adhesive. A first spherical joint 8 for η is formed on the outer surface on the front end side of the first fixing ring 6.

  The second fixing ring 7 that supports the inner core 3 and the connection port 5 that is the insertion port are formed by injection molding.

  A part of the outer surface of the second fixing ring 7 constitutes an extension of the injection-molded core 3 that does not directly form a pipe line as described above, and a flat outer peripheral surface is formed on the remaining portion of the outer surface. A locking groove 15 is provided on the tip side.

  The protrusion 16 provided on the inner periphery of the core 3 is fitted in the locking groove 15 and the flat outer peripheral surface and the inner peripheral surface of the core 3 inserted in advance in the shell 2 are bonded and bonded to each other. The core 3 is firmly supported by the fixing ring 7. Accordingly, the core 3 is configured to be easy to assemble, and, unlike 52 in FIG. 5, the core 3 does not slide or relocate independently but functions as an inner spherical joint.

  The core 3 is formed in a thick ring that forms a partial spherical surface on the outer surface thereof and slides on the inner surface of the shell 2. An O-ring groove 17 is provided around the outer surface of the maximum diameter, and an O-ring 18 is attached.

  Therefore, the shell 2 and the core 3 support the strength, water tightness and free swing angle θ of the universal pipe joint 1.

  Next, the movable ring 10 has a propeller-shaped cross section, and functions as a bridge between the first and second fixing rings 6 and 7 on both sides and creates a free swing angle η. First and second spherical joints 8 and 9 are formed.

  In the figure, a first spherical joint 8 for η is formed on the inner surface on the rubber ring receiving side, and a second spherical joint 9 is formed on the outer surface on the insertion port side. In the figure, reference numeral 19 denotes a plurality of ribs. Of course, a plurality of movable rings 10 may be provided in series.

  Even when the universal pipe joint 1 of the present embodiment as described above is freely displaced, it is possible to make only the following slight unevenness, that is, a substantially flat pipe surface.

  3A is a longitudinal sectional partial view passing through the tube axis a, FIG. 3B is a developed plan view of the second filth reservoir 12 at the maximum upward swing angle θ = 15 degrees, and FIG. ) Shows a developed plan view of the first filth reservoir 11 in the same state. In FIG. 3, 1.1, 26, 3.8, 49, 20, 29, etc. indicate dimensions (millimeters).

  The universal pipe joint 1 is for a drainage pipe made of PVC having a nominal diameter of 150 mm as described above, and when the free swing angle θ is 15 degrees, the second fixed ring 7 on the bottom side of the pipe is connected to the second fixed ring 7. A second waste reservoir 12 is formed in the space between the spherical joint 9 and the movable ring 10.

  In addition, a first waste reservoir 11 is formed in the space between the first spherical joint 8 and the movable ring 10 in the fixed ring 6.

  The second filth reservoir 12 has a shape in which two bow-shaped strings are abutted in a plan view, and has a substantially triangular shape in a longitudinal sectional view.

  Since this illustration and the illustrations of FIGS. 5B and 5C of the conventional example are schematic diagrams represented by substantially the same dimensions (both having a nominal diameter of 150 mmφ), the contrast is uneven at first glance. Although the size is clear, the dimensions are 49 mm (118 mm) and 26 mm (105 mm) for the bow-shaped strings and 29 mm (82 mm) for the bottom of the triangle in the second trash reservoir 12 as shown in FIGS. ), And the height is 3.8 mm (20 mm). Figures in parentheses are those in Figure 5.

  Further, in the first filth reservoir 11, similarly, the bow-shaped string is 26 mm (none) and the triangular height is 1.1 mm (none). The parentheses indicate that they are not formed in FIG.

  Therefore, this specific quantitative effect directly supports the effect of the present invention. As a result, even when the maximum free swing angle θ = 15 degrees of the universal pipe joint 1 of this embodiment is taken upward, No irregularities and inferiority at the pipe joint, and no mooring of filth.

  By the way, in the case of a straight pipe joint using a rubber ring receptacle / inlet of a PVC pipe, as shown in the difference (5) in FIG. The thickness t / 2 of the tip is formed by an inclined outer surface of 15 to 30 degrees, and therefore, a recess surrounded by a height of about 2.5 mm and an extended line of the inclined outer surface is formed. It is the same as the numerical value.

  And in the universal pipe joint 1 of the present embodiment, when the maximum swing angle θ = 15 degrees on one side is 15 °, it becomes a pipe with a steep upstream side, so that solids such as earth and sand are first, Since the second filth reservoirs 11 and 12 are not moored but washed away, the solid matter is not moored in the same manner as the straight pipe joint.

  Of course, when the universal pipe joint 1 of the present embodiment is used with the maximum free swing angle θ = 15 degrees in the horizontal plane, it is equivalent to the straight pipe joint.

  Moreover, in the universal pipe joint 1 of the present embodiment, since the rubber ring receiving port (4) is integrally formed with the shell 2, the rubber ring receiving port 55 is provided in the core 52 shown in FIG. Compared to those whose properties are not fixed, the workability can be simplified, which is advantageous for piping in narrow grooves.

  Next, a second embodiment of the present invention will be described.

  In FIG. 4, the universal pipe joint 1A of the second embodiment includes an outer shell 2 having a partially spherical bulge portion integrally molded with one rubber ring receiving port (4), and the rubber ring receiver. On the opposite side of the mouth (4), before the free displacement, the outer surface has a partial spherical surface integrally molded with the other difference port (5) on the same straight tube axis a, and the tube is inside of the same. The inner shell 3A that does not directly form a path, and is formed integrally from the bulging bases of these two shells 2, 3A, protrudes and opposes, and has a first end that is bent. And a second fixed ring 6A, 7A and a movable member having the same spherical joint sliding on the first and second spherical joints 8A, 9A formed on the inner or outer surface of these fixed rings 6A, 7A. Ring 10 and these rings 6A, 7A, 10 The two spherical joints 8A and 9A have an inner diameter that is substantially the same as that of the rubber ring receiving port (4) and the like to form a pipe line and follow the displacement of the free swing angle θ, respectively. The displacement is η1, η2).

  In particular, one free swing angle η1 by the rings 6A, 7A and 10 is different from the other free swing angle η2, and the sum η1 + η2 is made equal to the free swing angle θ of the shells 2 and 3A. So that you can follow exactly. For example, when θ = 15 degrees, η1 = 10 degrees and η2 = 5 degrees.

  Therefore, the rotation center axis d of the free swing angle η1 by the first spherical joint portion 8A having a large curvature radius with respect to the rotation center axis b of θ by the shells 2 and 3A is the second spherical joint portion 9A having a small curvature radius. Is smaller than the rotation center axis c of the free swing angle η2.

  One method of using the universal pipe joint 1A of the second embodiment as described above will be described.

  The rubber ring receiving port (4) is connected to the outlet side of a synthetic resin or the like or a manhole to be a fixed side, and the difference port (5) is displaced 15 degrees downward to be a steeply movable side. In this case, when the shells 2 and 3A are smoothly slid, for example, when the shell 3A is slid so as to be at the maximum free swing angle θ = 15 degrees and brought into contact with the stopper 20, the first and the second In the fixed rings 6A and 7A and the thin movable ring 10, as shown in FIG. 2, the one end having the spherical joint 9A on the outer surface of the movable ring 10 coincides with the base of the fixed ring 9A. As a result, the accumulation of a on the tube bottom side in the horizontal state is eliminated, and no accumulation occurs on the tube bottom side as a whole (see paragraph 27).

  Of course, at that time, some unevenness is observed on the tube top side, which is comparable to the straight tube joint portion of the first embodiment.

It is sectional drawing of the 1st Example of this invention. It is explanatory drawing of FIG. FIG. 3 is a detailed explanatory diagram of FIG. 2. It is sectional drawing of a 2nd Example. This is a conventional example.

DESCRIPTION OF SYMBOLS 1 Universal pipe joint 2 Ciel 3 Core 4, 5 Connection port 6, 7 Fixed ring 8, 9 Spherical surface joint 10 Movable ring

Claims (3)

In a synthetic resin universal pipe joint that has a partial spherical surface and can be displaced by a free swing angle θ,
A first member carrying the displacement of the free swing angle θ and the strength of the joint;
The first member is divided into a second member that is located on the inner diameter side of the first member and that displaces following the displacement of the free swing angle θ and that makes the tube cross-sectional area substantially uniform. Make a flexible joint made of synthetic resin,
The first member is composed of an outer shell having a spherical joint having a free swing angle θ, and an inner shell or inner core that slides on the inner surface of the outer shell, and the second member is a plurality of spherical surfaces. The joint member does not carry the joint strength, and the swing angle of the plurality of spherical joint members is smaller than the swing angle θ of the first member, so that the plurality of spherical joint members A synthetic resin universal pipe joint, characterized in that it is formed on a pipe surface that is flattened with small irregularities due to the freely changing position . In a synthetic resin universal pipe joint that has a partial spherical surface and can be displaced by a free swing angle θ,
A first member carrying the displacement of the free swing angle θ and the strength of the joint;
The first member is located on the inner diameter side of the free swing angle θ and is provided on substantially the entire surface of the pipe. The first member is displaced following the displacement of the free swing angle θ, and has a substantially equal cross-sectional area. The second member to be uniformed, and a synthetic resin universal pipe joint configured separately,
The first member is composed of an outer shell and an inner shell or an inner core having a spherical joint with a free swing angle θ,
The second member is composed of members each having a free swing angle η = θ / n and having n spherical joints, and a double spherical surface is formed by these first and second members. Synthetic resin universal pipe joint. The universal joint made of synthetic resin according to claim 1 or 2, wherein the joint is used as a drain pipe and mooring of filth is eliminated .

Images