JPH0339666Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a universal joint used, for example, to connect a drainage basin and a drainage pipe, or to connect drainage pipes to each other.

[Conventional technology]

Conventionally, for example, if there is a large step when connecting a drainage basin and a drainage pipe, two elbow joints 103, 103 are used as shown in Fig. 12A.
Generally, a method is adopted in which the drain basin 101 and the drain pipe 102 are connected using a short pipe 106. However, this connection method requires a large step difference that allows the elbow joints 103, 103 to be connected vertically via the short pipe 106, so if the step difference is small, connection is impossible.

Therefore, if the level difference is small, as shown in FIG.
Use 07 to drain water 101 and drain pipe 10
2 or via a flexible tube 105 as shown in FIG. In some cases, the pipes are bent and connected by heating them directly at the work site.

[Problem that the invention attempts to solve]

However, the connection method shown in FIG. 12B has problems such as high cost because it uses two expensive universal joints 104, and water pooling in two places, which is not desirable. Further, in the case of FIG. 3C, in which the flexible tube 105 is used, there are problems in that the connecting portion inevitably becomes long, and if the bending angle of the flexible tube 105 is increased, the flexible tube 105 tends to become flattened. Furthermore, when directly heating and bending a drain pipe, there are problems such as deformation, which impairs the roundness of the pipe, and deterioration of the drain pipe due to the heat.

As described above, all of the conventional connection methods when the difference in height is small have problems, and therefore, there is a desire in related industries to develop a convenient joint that can effectively absorb the small difference in height and connect easily and reliably. There is.

[Means to solve the problem]

The universal joint of the present invention was devised in view of the above circumstances, and consists of a socket having a socket and an insertion tube, and an intermediate rotating body having an eccentric inner hole rotatably fitted into the socket. , the gist is that an inner rotating body having an eccentric inner hole for inserting a pipe is rotatably fitted into the inner hole of the intermediate rotating body.

[Effect of invention]

In a universal joint with such a configuration, the two are connected by inserting the insertion tube of the socket into the socket of the drainage basin, for example, and inserting the drainage pipe into the inner hole of the inner rotating body. If there is a small step between the socket socket and the drain pipe, first rotate the intermediate rotary body within the socket socket to roughly align the eccentric inner hole so that it almost faces the pipe, and then By rotating and finely adjusting the inner rotor in the inner bore of the intermediate rotor, the eccentric inner bore of the inner rotor can be precisely aligned with the pipe and the pipe can be inserted and connected. Therefore, with this universal joint, small differences in level within the area of the receptacle of the socket can be well accommodated.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an exploded perspective view of the first embodiment of the present invention, FIG. 2 is a partially cutaway perspective view of the first embodiment, and FIG.
The figure shows a sectional view at the second -.

In the figure, 1 is a socket made of synthetic resin, and this socket 1 has a socket 11.
In the direction opposite to 1, there is an insertion tube 12 for insertion and connection to a drainage basin or drainage pipe. Both the socket 11 and the insertion tube 12 have a cylindrical shape, and the diameter of the socket 11 is larger than that of the insertion tube 12. In addition, this socket 11 and the insertion tube 12
are eccentric to each other. And this socket 1
A groove 13 is provided on the inner peripheral surface of the socket 11, and a rubber ring 14 is fitted into the groove 13 as a seal for preventing water leakage. An intermediate rotating body 2 made of synthetic resin is rotatably fitted into the socket 11 of the socket 1. The intermediate rotating body 2 has an eccentric inner hole 21 formed by integrally molding a circular inner cylinder 23 so as to be inscribed in a circular outer cylinder 22. A flange-like stopper 24 is formed. In addition, the inner hole 21
An inner rotating body 3 made of synthetic resin is rotatably fitted into the housing. This inner rotating body 3 also has a circular inner cylinder 3 inscribed in a circular outer cylinder 32, similar to the intermediate rotating body.
3, an eccentric inner hole 31 into which the pipe 8 is inserted is formed, and an inner flange-like stopper 34 is provided at the far end of the inner hole 31.
It is formed as shown in the figure. This inner rotating body 3
Needless to say, the diameter R3 of the inner hole 31 is almost the same as the outer diameter of the pipe 8, but the outer diameter of the outer cylinder 32,
In other words, when the diameter R2 of the inner hole 21 of the intermediate rotating body 2 is the diameter R1 of the socket 11 of the socket 1, and ignoring the wall thickness of the intermediate rotating body 2 and the inner rotating body 3, R2≧(R1+R3)/2. It is desirable to set it so that Setting R2 as above, as detailed later,
This is because the inner hole 31 of the inner rotating body 3 for pipe insertion can be positioned at any location within the range of the socket 11 of the socket 1.

When using a universal joint with such a configuration, for example, to connect a drainage basin and a drainage pipe, the socket 1's socket 11 should be eccentrically located directly above the insertion tube 12, as shown in Fig. 3. Then, insert the insertion tube 1
2 into the socket 109 of the drainage basin 101 and the end of the pipe 8 into the inner hole 31 of the inner rotating body 3. In a normal connection state with no steps,
As shown in the figure, the inner hole 21 of the intermediate rotating body 2 and the inner hole 31 of the inner rotating body 3 are both eccentrically located directly below, and the lower end of the inner circumferential surface of the pipe 8 and the inner circumference of the insertion tube 12 of the socket 1 The bottom edges of the surfaces are at almost the same height. Therefore, the inflow water flows smoothly as shown by the arrow in the figure and does not stagnate. Furthermore, as will be described later, even if the intermediate rotating body 2 or the inner rotating body 3 are rotated and the position of the pipe 8 is moved upward,
The inflowing water flows smoothly as if falling.
In addition, the drainage basin 101, the socket 1, and the intermediate rotating body 2
A sealant or adhesive is applied to the inner rotary body 3 and the pipe 8 in advance, and the inner rotating body 3 and the pipe 8 are connected to each other.

FIG. 7A schematically shows the positional relationship of the socket 11 of the socket 1, the inner hole 21 of the intermediate rotating body 2, and the inner hole 31 of the inner rotating body 3 in the above-mentioned normal connected state. Inner hole 21 of intermediate rotating body 2
The inner hole 31 of the inner rotary body 3 and the inner rotary body 3 are both eccentrically located directly below, and the pipe 8 is inserted into the inside of the inner hole 31 of the inner rotary body 3 shown by diagonal lines. On the other hand, if the connection position of the pipe 8 is located diagonally upward as shown by the dotted line, creating a step, first rotate the intermediate rotating body 2 from the state shown in FIG. Roughly align the inner hole 21 so that it almost faces the pipe as shown in FIG. After that, by slightly rotating the inner rotating body 3 and making fine adjustments, the inner hole 31 is accurately aligned as shown in Figure C, and the pipe can be inserted to successfully absorb the difference in level and connect. can.

By the way, as schematically shown in FIG. 8, when only one rotating body 9 having an eccentric inner hole 91 for inserting a pipe is fitted into the socket 11 of the socket 1, the rotating body 9 cannot be rotated. In particular, the inner hole 91 always rotates in a state inscribed in the socket 11,
The center 0 of the inner hole 91 is a concentric circle trajectory indicated by a dashed line
I will draw C1. Therefore, in this case, plug-in connection is possible only when the center of the pipe is located on the above concentric circle locus C1,
If it is in any other position, connection will not be possible.

However, as in the present invention, the intermediate rotating body 2 having an eccentric inner hole 21 is fitted into the socket 11 of the socket 1, and the inner rotating body 3 having an eccentric inner hole 31 is further fitted into the inner hole 21. If it is, as shown in FIG. 9, the center 01 of the inner hole 21 of the intermediate rotating body 2 will just draw a concentric locus C2 shown by the dashed line, but the inner rotating body will move inside the inner hole 21. 3 inner hole 3
1 further rotates in the inscribed state, and therefore, the inner hole 31 of the inner rotary body 3 has a concentric locus C3 drawn by the center point of the inner hole 31 when it is at the position closest to the periphery as shown by the solid line, and a broken line A concentric circular locus drawn by the center point of the inner hole 31 at the position closest to the center as shown by
The center of the inner hole 31 can be located at any location within the area surrounded by C4, that is, within the shaded area. Therefore, no matter where the center of the pipe is within this shaded range, the inner hole 31 of the inner rotating body 3 can be inserted and connected by matching the inner hole 31, and the positioning can be made more freely than in the case shown in FIG. The level will improve significantly. In this FIG. 9, the diameter of the inner hole 21 of the intermediate rotating body 2 is
R2, the diameter of the socket 11 of the socket 1 is R1, the diameter of the inner hole 31 of the inner rotating body 3 is R3, and the wall thickness of the intermediate rotating body 2 and the inner rotating body 3 is ignored, R2 < (R1 + R3) / 2 Since an example is shown in which the setting is made so that As mentioned above, by setting R2≧(R1+R3)/2, such a blank area D
disappears. That is, when R2=(R1+R3)/2, the center of the inner hole 31 located furthest from the center coincides with the center of the socket 11, so the blank area D disappears, and R2>(R1+R3)/2. If so, they will overlap. Therefore, by setting R2≧(R1+R3)/2 as described above, the inner hole 3 of the inner rotating body 3
1 can be brought to any position within the range of the socket 11, so that no matter where the pipe is located within the range of the socket 11, the inner hole 31 can be inserted and connected by accurately matching the inner hole 31 facing each other. There is an advantage.

Next, FIG. 4 shows an exploded perspective view of the second embodiment, FIG. 5 shows a partially cutaway perspective view thereof, and FIG. 6 shows a sectional view taken at - in FIG. 5.

This socket 4 is similar to the socket 1 of the first embodiment.
It is also made of synthetic resin, but has a different external shape, having a bowl-shaped socket 41, and an insertion tube 42 provided on the opposite side of the socket 41. The inner surface of this socket 41 is a concave spherical surface, and the insertion tube 42 is cylindrical, and the diameter of the socket 41 is larger than that of the insertion tube 42. Further, the socket 41 and the insertion tube 42 are eccentric to each other. An intermediate rotating body 5 made of synthetic resin is rotatably fitted into the socket 41 . The intermediate rotating body 5 has an eccentric inner hole by integrally molding a circular inner cylinder 53 inscribed in an outer cylinder 52 formed into a convex spherical surface so that the outer surface fits into the socket 41. 51, and a concave groove 54 is provided on the outer surface of this outer cylinder 52. A rubber ring 55 is fitted into the groove 54 as a gasket for rotatably and watertightly fitting into the socket 41. In addition, an inner flange-like stopper 56 is provided at the rear end of the inner cylinder 53.
is formed. The inner rotor 3 shown in FIG. 1 is rotatably fitted into the inner hole 51 of the intermediate rotor 5.

In this second embodiment, the difference in level can be absorbed using the same principle as in the first embodiment, and the insertion angle of the pipe 8, which was impossible in the first embodiment, can be changed as shown in Fig. 10 A and B. It has the advantage of being able to be changed vertically and horizontally.

Note that instead of the inner rotating body 3 used in the first and second embodiments, an inner rotating body 3' shown in FIG.
may be used. That is, this inner rotating body 3' has a concave groove 3 on the inner peripheral surface of an inner cylinder 33' that is inscribed in an outer cylinder 32'.
5' is provided, and a rubber ring 36' is fitted into the groove 35' as a gasket. Therefore, when the pipe 8 is inserted into the eccentric inner hole 31' of such an inner rotary body 3', there is an advantage that water-tightness is maintained. Note that when this inner rotating body 3' is fitted to the intermediate rotating bodies 2 and 5, the protruding line 37' corresponding to the groove 35' protrudes from the outer peripheral surface of the inner cylinder 33', so that the protruding line 37' portion The inner rotary body 3' is inserted only up to that point, and the inner rotary body 3' is in a protruding state. To eliminate this, the inner cylinder 33'
It is sufficient to provide a concave groove within the thickness and fit the gasket therein. The same thing can be said in the case where a groove is provided in the outer cylinder of the intermediate rotating body and the groove is fitted into the outer cylinder.

[Effect of idea]

By using the universal joint of this invention, when a small step occurs when connecting a drainage basin and a drainage pipe, or when connecting drainage pipes to each other, the intermediate rotating body can be rotated in the socket and rotated internally within the intermediate rotating body. By rotating the body, alignment is performed, this small step is absorbed, and connection can be easily made.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of a first embodiment of the present invention. FIG. 2 shows a first embodiment of the present invention. It is a partially cutaway perspective view. FIG. 3 is a sectional view taken at - in FIG. 2. Figure 4 shows
FIG. 2 is an exploded perspective view of a second embodiment of the present invention; FIG. 5 is a cutaway perspective view of the second embodiment of the present invention. FIG. 6 is a sectional view taken at - in FIG. 5. Figures 7A, 7B, and 7 schematically show how the pipes are moved. 8th
9 are diagrams schematically showing the range in which the pipe can move. FIGS. 10A and 10B schematically show the range of change in the insertion angle of the pipe. FIG. 11 shows another shape of the inner rotating body. Figures 12A, 12B and 12C schematically show the prior art. 1, 4...Socket, 2, 5...Intermediate rotating body,
3, 3'...Inner rotating body, 8...Pipe, 101
...Drain water.

Claims (1)

[Scope of utility model registration request] An intermediate rotating body having an eccentric inner hole is rotatably fitted into the socket of a socket having a socket and an insertion tube,
A universal joint formed by rotatably fitting an inner rotating body having an eccentric inner hole for inserting a pipe into the inner hole of the intermediate rotating body.