JPH0738289U - Rubber ring for seal - Google Patents

Abstract

(57) [Summary] [Purpose] When connecting pipes, they can be connected smoothly without falling off, and the sealing property of this connection is ensured. A pipe body (2) having a pipe connection portion (4) having a connection end face (6) inclined at an angle (θ) with respect to the pipe axis direction and a tapered portion (8) having a taper angle (α) formed on an outer peripheral surface, The other tube body 3 having a connecting end surface 7 inclined at an angle θ with respect to the tube axis direction and having a tube connecting portion 5 in which an enlarged diameter portion 13 having a divergence angle β is extendedly formed is rotatably connected to each other. The universal joint 1 is formed into a ring shape having a substantially semi-cylindrical cross section in which a semicircle 10a and a square 10b are integrally formed, and has a cutting depth C having a radius R of the semicircle 10a.
Further, a rubber ring 10 for sealing, in which a V-shaped groove 16 having an opening angle γ of about 60 ° is formed toward the tip end side of the taper portion 8, a square portion 10b is attached to the taper portion 8, and the taper portion 8 is formed. It is provided between the outer peripheral surface and the inner peripheral surface 13a of the expanded diameter portion 13.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a rubber ring for sealing used in, for example, pipes in a pipe used for drainage, or a universal joint that freely adjusts a connection angle between a rod and a pipe. .

[0002]

[Prior art]

 Universal joints that change the piping direction of the pipeline are used for the pipes that make up the sewage and drainage pipelines. This type of universal joint has a connection end face inclined at a predetermined angle θ with respect to the pipe axis direction, and a taper portion having a predetermined taper angle α is formed on the outer peripheral surface along the connection end face. One pipe body having a pipe connecting portion and a connecting end face inclined at a predetermined angle θ with respect to the pipe axial direction, and an enlarged diameter portion having a divergence angle β of a predetermined angle is formed to extend from the connecting end face. The other tube body having the tube connection portion is rotatably connected to each other via the connection end faces.

In the universal joint having such a structure, the cross-sectional shape is circular between the outer peripheral surface of the tapered portion of the one tubular body and the inner peripheral surface of the expanded diameter portion of the other tubular body. An O-ring-shaped rubber ring for sealing formed on the above is interposed to stop water between the pipe connecting portions.

[0004]

[Problems to be solved by the device]

 However, in the rubber ring for sealing in the conventional universal joint described above, in order to improve the sealing property of the tubular body, it is possible to deal with it by increasing the diameter of the circular cross section, but the tubular bodies are connected to each other. In this case, that is, there is a disadvantage that the frictional resistance when inserting the taper portion on the insertion side into the expanded diameter portion on the reception side becomes large, and there is a problem that connection becomes difficult.

Further, the above rubber ring for sealing is attached to the taper portion on the insertion side. However, if the cross-sectional shape is simply made large, it will largely protrude from the outer peripheral surface of this taper portion so that the tubular members There is a problem that this rubber ring comes into contact with the expanded part on the receiving side and falls off when connecting.

Therefore, in order to solve the above-mentioned problems, the present invention enables a smooth connection work without disconnecting the pipes when they are connected to each other, and also has a highly compressible and reliable sealing rubber ring. Is intended to provide.

[0007]

[Means for Solving the Problems]

 Next, means for achieving the above object will be described with reference to the drawings corresponding to the embodiments. The sealing rubber ring 10 of the present invention has a ring shape or a band shape formed in a substantially semi-cylindrical cross section in which a semicircle 10a and a square 10b are integrally formed, and the radius R of the semicircle 10a or It is characterized by having a cutting depth C less than the radius R and having a V-shaped groove 16 having an opening angle γ of less than 90 °.

Further, the rubber ring for sealing according to the present invention has the connecting end face 6 inclined at the predetermined angle θ with respect to the pipe axis direction, and the outer peripheral surface along the connecting end face 6 is tapered to a predetermined taper angle. The one pipe body 2 having the pipe connecting portion 4 in which the taper portion 8 of α is formed, and the connecting end face 7 inclined at a predetermined angle θ with respect to the pipe axial direction and having a predetermined divergence angle from the connecting end face 7 In the universal joint 1 including the other tube body 3 having the tube connection portion 5 in which the enlarged diameter portion 13 of β is extended and formed, the V-shaped groove 16 of the rubber ring 10 for sealing has the tip of the tapered portion 8. The rectangular portion 10b is formed so as to face toward the side, and the rectangular portion 10b is attached to the tapered portion 8 of the one tube body 2 so that the outer peripheral surface of the tapered portion 8 of the one tube body 2 and the other tube body 3 are formed. Of the expanded pipe 13 and the inner peripheral surface 13a of the expanded pipe 13 It is characterized by performing the waterproofing between connection portion 4,5.

[0009]

[Action]

 The rubber ring 10 for sealing has a ring shape or a band shape having a substantially semi-cylindrical cross-sectional shape in which a semicircle 10a and a square 10b are integrally formed, and has a radius R of the semicircle 10a or less than the radius R. A V-shaped groove 16 having a cutting depth C and an opening angle γ of less than 90 ° is formed. The rubber ring 10 for sealing is mounted so that the rectangular portion 10b is mounted on the taper portion 8 of the one tube body 2 and is directed toward the tip end side of the taper portion 8. The sealing rubber ring 10 is provided between the outer peripheral surface of the tapered portion 8 of the one tube body 2 and the inner peripheral surface 13a of the expanded diameter portion 13 of the other tube body 3, and Water is stopped between the pipe connection parts 4 and 5 of the bodies 2 and 3.

[0010]

【Example】

 FIG. 1 is a side sectional view of a rubber ring for sealing according to an embodiment of the present invention in a mounted state. First, the structure of the universal joint to which the rubber ring for sealing is attached will be described. As shown in FIG. 1, the structure of this universal joint 1 is made up of a pair of pipes 2 and 3, and the mutually opposite ends are pipe connecting parts 4 and 5, respectively. 5 is formed with connecting end faces 6 and 7 which are inclined at a predetermined angle θ with respect to the pipe axis direction of the pipe body, for example, 7.5 °, and are rotatably interconnected via these connecting end faces 6 and 7. It has become so.

The pipe connecting portion 4 of the one pipe body 2 of each of the pipe bodies 2 and 3 is an insertion port, and as shown in FIG. 1, a predetermined taper is formed on the outer peripheral surface along the connection end face 6 to be tapered. The angle α, in this embodiment, the taper portion 8 having the same angle of 7.5 ° as the inclination angle θ of the connection end face 6, in other words, when the connection end face 6 is the reference plane and the direction orthogonal to this is the axial direction. A taper portion 8 having a taper angle α is formed.

An annular groove 9 is formed on the taper portion 8 along the connecting end surface 6 on the tip side of the outer periphery thereof, and a rubber ring 10 for sealing, which will be described later, is attached to the annular groove 9 and the annular groove 9. Engagement grooves 11 are formed parallel to each other. A coating flange 12 is formed so as to extend along the engagement groove 11 on the base end side of the tapered portion 8 which is the outside of the engagement groove 11.

It should be noted that the connecting end surface 6 which is the tip of the tapered portion 8 is formed to have a hollow concentric circle with a uniform width, and as shown in FIG. 1, the engaging groove 11 and the annular groove 9 are formed. An escape groove 8a is formed between the two pipe bodies 2 to reduce deformation during injection molding. Further, the covering flange 12 may be provided with a reinforcing rib 12a as shown in FIG.

Next, the pipe connecting portion 5 of the other pipe body 3 of the respective pipe bodies 2 and 3 is an expanded diameter receiving port, and as shown in FIG. 1, from the connecting end face 7 to the insertion port. Of the taper angle α of the taper portion 8 of the above, that is, the enlarged diameter portion 13 of the same angle 7.5 ° as the inclination angle θ of the connection end surface 7, that is, the connection end surface 7 as the reference surface. A direction orthogonal to this is defined as an axial direction, and a diameter-expanded portion 13 having a divergence angle β with respect to this is extended and formed.

Further, on the inner peripheral surface 13 a of the tip end edge of the expanded diameter portion 13, an engagement flange 14 having a claw-shaped cross section parallel to the connection end surface 7 is formed so as to project. The protrusion amount of the engagement flange 14, that is, the inner diameter D2 at the tip of the engagement flange 14, is smaller than the outermost shape at the position of the engagement groove 11 of the taper portion 8 as shown in FIG. It is set and formed to be equal to or slightly larger than the outermost diameter D1 of the sealing rubber ring 10 mounted in the annular groove 9 of the portion 8. Further, the connection end face 7 that is the bottom of the expanded diameter portion 13 is formed to have a hollow concentric circle with a uniform width, like the connection end face 6 of the tapered portion 8 described above.

Then, the insertion opening which is the one pipe connecting portion 4 is inserted into the receiving opening which is the other pipe connecting portion 5, and the diameter is expanded to the engagement groove 11 of the taper portion 8 as shown in FIG. The engagement flange 14 of the portion 13 is engaged and slidably fitted. In this fitted state, both pipes 2 and 3 are rotatably connected to each other, and in a straight state where both pipes 2 and 3 are not rotated, as shown in FIG. , L2 are on the same line, and the connecting end surfaces 6 and 7 are inclined with respect to each other, the other (one) tube body is 0 to 2θ with respect to the one (other) tube body, as shown in FIG. In the embodiment, the bending angle of any angle between 0 and 15 ° can be freely adjusted and set. Further, a protrusion 15 having a semicircular cross-section as shown in FIG. 3 is formed on the tip surface 13b of the expanded diameter portion 13 to form a point contact or line contact structure with the coating flange 12 of the one pipe connection portion 5. As a result, the frictional resistance during rotation can be reduced.

Next, an embodiment of the rubber ring for sealing of the present invention mounted on the universal joint having the above-mentioned structure will be described. As shown in FIG. 2, the rubber ring for sealing 10 of this embodiment has a semi-cylindrical shape in which a semicircle 10a and a square 10b are integrally formed and has a radius R of the semicircle 10a. A V-shaped groove 16 having a cutting depth C of the same length as the above and an opening angle γ of less than 90 °, for example, about 60 ° is formed on the side surface, and the square portion 10b is the inner peripheral side, and a semicircle The section 10a is formed in an annular shape having a continuous cross section with the outer peripheral side.

Then, the rubber ring 10 for sealing is mounted in the annular groove 9 formed in the tapered portion 8 of the one tube body 2. In the mounted state, the rectangular portion 10b of the rubber ring 10 for sealing is mounted so as to fit in the annular groove 9 as shown in FIG. 1, and the V-shaped groove 16 formed on the side surface of the tapered portion 8 is formed. It is attached so that it faces the tip side.

As a result, when the one tubular body 2 and the other tubular body 3 are connected as described above and brought into the fitted state as shown in FIGS. 3 and 4, the sealing rubber ring 10 is As shown in FIG. 3, the outer peripheral surface of the tapered portion 8 of the tubular body 2 and the inner peripheral surface 13a of the expanded diameter portion 13 of the other tubular body 3 are compressed and deformed into a substantially rectangular cross section. And the pipe connections 4 and 5 are watertight.

Therefore, in the rubber ring 10 for sealing configured as described above, the insertion opening which is the one pipe connection portion 4 of the pair of pipe bodies 2 and 3 is inserted into the reception opening which is the other pipe connection portion 5. When the engaging flange 14 of the expanded diameter portion 13 is engaged with the engaging groove 11 of the taper portion 8 to connect the two pipe bodies 2 and 3 to each other, the V-shaped groove facing the tip side of the taper portion 8 is formed. Since 16 is formed, the semicircular portion 10a on the outer peripheral side of the sealing rubber ring 10 can be retracted in the direction of the rectangular portion 10b at the time of connection, so that friction resistance does not increase and insertion resistance decreases, which is easy. Can be connected smoothly.

Further, since the friction resistance is small when connecting the pipe bodies 2 and 3, the sealing rubber ring 10 does not fall off, and the connection work can be easily performed without any trouble.

Further, when the tubular bodies 2 and 3 are connected to each other, the rubber ring 10 for sealing has a substantially rectangular cross section when the V-shaped groove 16 on the side surface is crushed and compression-deformed. In addition, since it is interposed between the annular groove 9 of the taper portion 8 and the inner peripheral surface 13a of the expanded diameter portion 13 without any gap, a reliable sealing property can be obtained and a negative pressure water pressure is generated. It is also effective for drainage pipes.

In addition, in the above-described embodiment, an example in which the cross-sectional shape of the rubber ring 10 for sealing is formed by setting the cutting depth C of the V-shaped groove 16 to a length equivalent to the radius R of the semicircle 10a will be described. As described above, the V-shaped groove 16 may be formed by setting the cutting depth C to be slightly shorter than the radius R of the semicircle 10a.

Further, in the above-described embodiment, the example in which the sealing rubber ring 10 is formed in an endless annular shape has been described, but it may be formed in a band shape.

Further, in the embodiment described above, in the structure of the universal joint 1, the taper angle α of the taper portion 8 and the divergence angle β of the enlarged diameter portion 13 are the same as the inclination angle θ of the connection end faces 6 and 7 ( Although the taper angle α and the divergence angle β are not the same as the inclination angle θ, they may be formed at a predetermined angle, for example, When the relationship between the taper angle α of the tapered portion 8 and the divergence angle β of the expanded diameter portion 13 is set to be α> β and formed, a gap is provided between the surface of the tapered portion 8 and the inner surface of the expanded diameter portion 13. It is possible to increase the volume of the sealing rubber ring 10 mounted in the annular groove 9 of the taper portion 8, that is, the shape of the cross section, thereby further improving the sealing performance at this connecting portion. You can

Further, in the above-mentioned embodiment, the example in which the connecting portions of the pair of pipes 2 and 3 have a joint structure in which the angle can be adjusted has been described, but one or the other pipe connection is made instead of the pipes. The structure may be such that the portion is formed as a drainage basin. The rubber ring for sealing 10 of the present invention is not limited to the universal joint 1 described above, but may be used for connecting pipe members.

[0027]

[Effect of device]

 As described above, in the rubber ring for sealing according to the present invention, when one pipe body and the other pipe body are connected to each other by the tapered portion and the enlarged diameter portion, the V-shape facing the tip end side of the tapered portion. Since the groove is formed, the semicircular portion on the outer peripheral side of this rubber ring is retracted in the direction of the square portion, which does not increase the frictional resistance and reduces the insertion resistance. The effect is that the bodies can be connected to each other.

In addition, since the sealing rubber ring has a small frictional resistance when the pipes are connected to each other, the sealing rubber ring does not fall off, and the connection work can be easily performed. There is an effect that the work of is not complicated.

Further, in the state where the pipes are connected to each other, the rubber ring for sealing is crushed by the V-shaped groove on the side surface and compressed and deformed to have a substantially rectangular cross section, and the annular groove of the tapered portion and Since there is no gap between the inner surface of the expanded diameter part and the inner surface, there is an effect that a reliable sealing property can be obtained, and it is also effective for drainage pipes where negative pressure water pressure is generated.

[Brief description of drawings]

FIG. 1 is a side sectional view showing a state in which a rubber ring for sealing according to the present invention is attached to a universal joint.

FIG. 2 is a side sectional view of a rubber ring for sealing according to the embodiment.

FIG. 3 is an enlarged side sectional view of a rubber ring for sealing in a universal joint in a fitted state according to the same embodiment.

FIG. 4 is a side sectional view showing a usage example of the universal joint according to the embodiment.

FIG. 5 is a side sectional view showing a usage example of the universal joint according to the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Universal joint 2 ... One tubular body 3 ... The other tubular body 4 ... One tubular connecting part 5 ... The other tubular connecting part 6 ... One connecting end face 7 ... The other connecting end face 8 ... Tapered part 10 ... For sealing Rubber ring 10a ... Semicircle 10b ... Square 13 ... Expanded portion 13a ... Inner peripheral surface 16 ... V-shaped groove C ... Depth of cut R ... Radius α ... Taper angle β ... Spread angle γ ... Opening angle θ ... Inclination angle

Claims (2)

[Scope of utility model registration request] 1. A ring-shaped or band-shaped member having a substantially semi-cylindrical cross-sectional shape in which a semicircle and a square are integrally formed,
A rubber ring for sealing, which has a V-shaped groove having a radius of the semicircle or a cutting depth less than the radius and an opening angle of less than 90 °. 2. A pipe connecting portion having a connecting end face inclined at a predetermined angle θ with respect to the pipe axis direction and having a taper portion with a predetermined taper angle α tapering on an outer peripheral surface along the connecting end face. One of the pipes having the above, and a pipe connecting part having a connecting end face inclined at a predetermined angle θ with respect to the pipe axis direction and a pipe connecting part in which an enlarged diameter part of a predetermined spread angle β is formed to extend from the connecting end face. And a V-shaped groove of the rubber ring for sealing according to claim 1, wherein the V-shaped groove is formed toward the tip end side of the taper portion, and the rectangular portion is a taper of the one tube body. Installed between the outer peripheral surface of the tapered portion of the one pipe body and the inner peripheral surface of the expanded diameter portion of the other pipe body to stop water between the pipe connection portions. A rubber ring for sealing, which is characterized by that.