JPH0720470Y2 - Universal joint - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a universal joint capable of freely adjusting the connection angle of pipes.

[0002]

2. Description of the Related Art Conventionally, for example, as shown in FIG. 11, the connecting end faces (4) and (5) of a pair of pipe connecting portions (1) and (2) are inclined at a predetermined angle θ, respectively, and the pair of pipes are connected. Connect the connection parts (1) and (2) to the connection end face.
There is provided a universal joint (3) which is rotatably connected via flanges (6) and (7) forming (4) and (5).
-51286).

In the pipe connecting portions (1), (2), one pipe connecting portion (1) is rotated with respect to the other pipe connecting portion (2) to freely adjust the connection angle from 0 ° to 2θ. You can do it.

[0004]

[Problems to be Solved by the Invention] However, in the above-mentioned universal joint (3), even if the connection angle can be adjusted to a desired one, the peak of the bend during the construction and the direction in which the pipe top is located It was unclear if it was facing, and it was not possible to see it, and it was difficult to carry out correct piping work. Universal joint
It is also difficult to arrange the bending direction of (3) in a desired direction.

[0005]

[Means for Solving the Problems] As a means for solving the above-mentioned conventional problems, the present invention is rotatably interconnected via connection end faces (14), (15) inclined at a predetermined angle θ. It consists of a pair of pipe connections (12), (13), and one pipe connection (1
In the vicinity of the connection end face (14) of 2), the connection end face is
An annular groove (16) is formed along (14), the expanded diameter portion (20) is extended from the connection end surface (15) of the other pipe connection portion (13), and the expanded diameter portion (20) is formed.
On the inner circumference of the end of the sliding flange (21) along the connecting end surface (15)
A universal joint (11) in which the sliding flange (21) of the other pipe connecting portion (13) is slidably fitted in the annular groove (16) of the one pipe connecting portion (12). At one or the other pipe connection (1
2), (13) with the central part of the inclination on the peripheral surface near the connecting end faces (14), (15) as 0, and turning clockwise along the connecting end faces (14), (15).
The main scales (30), (31) from 0 to 2θ are attached in the range of °, and the pipe connecting parts (12), (13) are provided on the outer peripheral surface of the main scales (30), (31). ) 0 along the circumference of 90 ° clockwise
From 2 to 2θ, the sub-scales (30) A and (31) A are attached, and 2θ or 0 of the main scales (30) and (31) and the sub-scales (30) A and (31) A
0 or 2θ is on the same ridge line, and the central part of the inclination is 0 on the peripheral surface near the connection end faces (15), (14) of the other or one of the pipe connection parts (13), (12). Main scale from 0 to 2θ in the range of 90 ° counterclockwise along the connection end faces (15) and (14)
(31), (30) are attached, and further, on the outer peripheral surface of the main scales (31), (30), a counterclockwise rotation 9 is made along the circumference of the pipe connecting portions (13), (12).
A sub-scale (31) A, (30) A from 0 to 2θ is attached in the range of 0 °, and 2θ or 0 of the main scale (31), (30) and the sub-scale (31) A, (30 ) A is on the same ridge as 0 or 2θ,
Also, when the same numbers on the main scales (31) and (30) of both pipe connection parts (12) and (13) are combined, the numbers are the same for both pipe axes a ₁ and a _2.
The present invention provides a universal joint (11) that represents the angles formed by and shows the position of the apex of the bend at each angle.

[0006]

When the other pipe connecting portion (13) is rotated with respect to the one pipe connecting portion (12), the inclination angles of the connecting end faces (14) and (15) are respectively set to θ, The angle can be freely adjusted from 0 ° to 2θ. Therefore, if the scale of the main scale (30) of the pipe connection part (12) and the scale of the main scale (31) of the pipe connection part (13) are set to the same number (denoted as θ ₁ ), the pipe connection part (12) The angle between the tube axis a ₁ of () and the tube axis a ₂ of the tube connecting portion (13) is θ ₁ (0 ≦ θ ₁ ≦ 2θ). When the side surface of the universal joint (11) is viewed from directly above with the position of the main scale θ ₁ positioned right beside, the universal joint (11) is bent at an angle θ ₁ and the pipe connecting portion sub scale (30) (12) are on the same ridge line RL in sub-scale (31) the plane to the theta ₁ a in theta ₁ and the tube connection portion of the a (13), when the vertical pipe main Scale θ
_The bending apex can be visually recognized at ₁ , and the pipe top line can be visually recognized at the subscale θ ₁ in the case of horizontal piping.

In this case, one and / or the other pipe connection
Use the protrusions (22) and (23) of (12) and (13) as clues for rotation.
With the relative rotation of the pair of pipe connecting portions (12) and (13), the sliding flange (21) of the other pipe connecting portion (13) has an annular groove of the one pipe connecting portion (12). (16) Slide inside. In this way, the sliding flange (21) of the other pipe connecting portion (13) is fitted into the annular groove (16) of the one pipe connecting portion (12) to form the pair of pipe connecting portions (12). The connection of (13) is rotatably locked.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to an embodiment shown in FIGS. 1 to 10. The universal joint (11) has an inner connecting end surface (14) inclined at a predetermined angle .theta. (7.5.degree.). It consists of a pair of pipe connections (12), (13) that are rotatably interconnected via (15), and one pipe connection (12) is formed with a socket (12) A, and the other The pipe connection part (13) is formed with the insertion part (13) A,
A packing groove (12) B is formed in the receiving portion (12) A. A little outside from the connection end face (14) of one pipe connection part (12), an annular groove (16) is formed on the outer periphery of the pipe connection part (12) along the connection end face (14), A packing flange (17) is provided on the outside of the annular groove (16), and a packing ring (19) is mounted on the inside of the annular groove (16).
(18) is formed, and 1 is further provided on the outer circumference of the socket (12) A.
A pair of protrusions (2) with holes (22) A, (22) A at an angle of 80 °
2) and (22) are formed.

An enlarged diameter portion (20) is extended from the connection end face (15) of the other pipe connection portion (13), and the connection is made on the inner circumference of the end portion of the enlarged diameter portion (20) as shown in FIG. Sliding flange (21) along the end face (15)
Are projected intermittently, and the expanded diameter portion (2) of the pipe connection portion (13) is
A pair of protrusions (23), (23) having holes (23) A, (23) A are formed on the outer periphery of (0) at an angle of 180 °.

In the pair of pipe connecting portions (12) and (13),
On the peripheral surface of the covering flange (17) of the pipe connection part (12), the main part from 0 to 2θ = 15 ° in the range of 90 ° clockwise along the connection end face (14) with the central part of the inclination as 0. A scale (30) is provided, and the outer peripheral surface of the pipe connecting portion (12) is further rotated along the circumference of the pipe connecting portion (12) in the range of 90 ° clockwise from 0 to 2θ.
= 15 ° sub-scale (30) A is attached starting from 2θ of the main scale (30) and diagonally attached in pairs, and 15 or 0 of the main scale (30) and the sub-scale (30) A or 0 or 15 of A is on the same ridge line, while the diameter expansion part (20) of the pipe connecting part (13) has a peripheral end surface of the end portion with the central part of the inclination set to 0. 0 to 2θ = 1 in the range of 90 ° counterclockwise along
A main scale (31) up to 5 ° is attached, and the pipe connecting part (13) is provided on the outer peripheral surface of the pipe connecting part (13) outside the expanded diameter part (20).
0 to 2θ = 15 in the range of 90 ° counterclockwise along the circumference of
The sub-scales (31) A up to ° are attached starting from 2θ of the main scale (31) and are diagonally paired, and 2θ or 0 of the main scale (31) and the sub-scale (31) ) A 0 or 2
θ is on the same ridge.

In order to construct the universal joint (11) by connecting the pair of pipe connecting portions (12), (13), the connecting end face (14) of one pipe connecting portion (12) is connected to the pipe connecting portion. Insert it in the expanded part (20) of (13),
In the annular groove (16) of the one pipe connecting portion (12), the other pipe connecting portion
The sliding flange (21) of the expanded diameter portion (20) of (13) is slidably fitted. At this time, since the sliding flange (21) is intermittent, it can be deformed, and the fitting is easy. And since the outside of the gap (24) between the sliding flanges (21) is covered by the covering flange (17), dust, mud, etc. intrude from the connecting portions of the pipe connecting portions (12), (13). Is prevented.

In the above-mentioned universal joint (11), as shown in FIG. 5, the projections (22), (22), (23) and (23) of the pair of pipe connecting portions (12) and (13) are used as clues as shown in FIG. (25) or by fitting the pin (26) to the protrusions (22), (22), (23), (2) as shown in FIG.
3) Fit into the holes (22) A, (22) A, (23) A, (23) A,
If it is rotated through (25) or pin (26),
The angle between the tube axis a ₂ of the tube axis a ₁ and the pipe connection portion (12) (13), i.e. a connection angle from 0 ° shown in FIG. 2, 2 shown in FIG. 3
It is possible to freely adjust up to θ = 15 °.

That is, as shown in FIG. 7, when 0 of the main scale (30) of the pipe connecting part (12) and 0 of the main scale (31) of the pipe connecting part (13) are combined, the result is shown in FIG. The pipe axis a of the pipe connection part (12)
_The angle formed by ₁ and the pipe axis a ₂ of the pipe connection portion (13), that is, the connection angle is 0. When the universal joint (11) is viewed from directly above in this state, as shown in FIG. 8, 0 of the sub-scale (30) A of the pipe connection part (12) and the sub-scale (31) A of the pipe connection part (13) are shown. 0 is on the same ridge line RL _{1 in the} plane.

Then, as described above, the pipe connecting portion (13) is rotated with respect to the pipe connecting portion (12) to form the pipe connecting portion as shown in FIG.
Main scale (30) 10 of (12) and main scale (3) of pipe connection part (13)
When 10 of 1) is combined, when the universal joint (11) is viewed from directly above as shown in FIG. 10, the pipe axis a _{1 of the} pipe connecting portion (12) and the pipe axis a of the pipe connecting portion (13) are shown. _The angle θ ₁ formed by ₂ and the connection angle is 10 °. And the minor scale (30) A of the pipe connection (12)
No. 10 and the sub-scale (31) A 10 of the pipe connection part (13) are on the same ridge line RL ₂ . In this way, after adjusting to the desired connection angle, the sockets (12) A, (13) A of the pipe connections (12), (13)
Insert and connect the pipe to be connected to each of. Normally, in the case of the above piping, horizontal piping in which the ridgeline RL ₂ of the universal joint (11) is located at the top of the pipe is performed, but in the case of vertical piping, the main scale (31),
Since the apex of the bend passes to the position (for example, 10-10) where (30) is put together, visually check this and bring this position to the top of the pipe. In the case of horizontal piping, the pipe top line (ridge line RL ₂ ) passes through the position (eg 10-10) where the sub-scales (31) A and (30) A are combined, so visually check this and check this position. Come to the top.

Other than this embodiment, the sub-scales are not necessarily diagonally attached to each other, and the main scales may be diagonally attached to each other. At that time, it is desirable to prevent one from being mixed by displaying one of the main scales in Chinese numerals and the other in arithmetic numerals. In the case of horizontal piping, since the ridge line RL ₂ is the top of the pipe, the top of the pipe can be visually recognized and accurate piping can be performed easily. The protrusion may be provided on only one of the pair of pipe connecting portions (12) and (13). Further, the pipe connecting portion may be provided with an insertion opening,
A receptacle may be provided.

[0016]

Therefore, in the universal joint of the present invention, the connection of the pair of pipe connecting portions can be rotatably locked without using a separate engaging means, and if the numbers on the main scale are adjusted. The pair of pipe connecting portions are connected at a desired angle, and the connecting angle can be visually recognized from above or from the side, and when the universal joint is vertically or horizontally piped, the main scale and the sub scale are connected. It can be easily adjusted to the correct position by visual inspection, which is extremely convenient for piping.

[0017]

[Brief description of drawings]

 1 to 10 show an embodiment of the present invention.

FIG. 1 is a perspective view.

FIG. 2 is an explanatory side sectional view showing a state where a connection angle is 0 °.

FIG. 3 is an explanatory side sectional view showing a state where a connection angle is 2θ.

[Fig. 4] Front view of the expanded portion

FIG. 5 is an explanatory diagram of a case where a pipe connecting portion is rotated by a pipe.

FIG. 6 is an explanatory diagram of a case where a pipe connecting portion is rotated by a pin.

FIG. 7 is an explanatory diagram of a scale when the connection angle is 0 °.

FIG. 8 is an explanatory view of the universal joint when the connection angle is 0 °.

FIG. 9 is an explanatory diagram of a scale when the connection angle is 10 °.

FIG. 10 is an explanatory view of a universal joint when the connection angle is 10 °.

FIG. 11 is an explanatory perspective view of a conventional example.

[Explanation of symbols]

 (1) Universal joint (12), (13) Pipe connection part (14), (15) Connection end face (16) Annular groove (17) Envelope flange (20) Expanding part (21) Sliding flange (30), (31) Major scale (30) A, (31) A Minor scale

Claims (1)

[Scope of utility model registration request] 1. A pair of pipe connecting portions that are rotatably interconnected via a connecting end surface inclined at a predetermined angle θ, and one of the pipe connecting portions has its outer periphery in the vicinity of the connecting end surface and is connected to the connecting end surface. Forming an annular groove along the same, extending the enlarged diameter portion from the connection end surface of the other pipe connection portion, the inner periphery of the end portion of the enlarged diameter portion is provided with a sliding flange along the connection end surface, the one of the one In a universal joint in which a sliding flange of the other pipe connecting portion is slidably fitted in an annular groove of the pipe connecting portion, a central portion of inclination is set to 0 on a peripheral surface near a connecting end surface of one or the other pipe connecting portion. A main scale of 0 to 2θ is attached in the range of 90 ° clockwise along the connection end face, and the outer peripheral surface of the main scale is rotated 90 ° clockwise along the circumference of the pipe connecting part. In the range of 0 to 2θ
2θ or 0 of the main scale and 0 or 2θ of the subscale are on the same ridge line, and the center of inclination on the peripheral surface near the connection end face of the other or one of the pipe connection parts A main scale from 0 to 2θ is provided in the range of 90 ° counterclockwise along the connecting end face with the part as 0, and the outer peripheral surface of the main scale is left along the circumference of the pipe connecting part. Around 90
A sub-scale from 0 to 2θ is attached in the range of °, 2θ or 0 of the main scale and 0 or 2θ of the sub-scale are on the same ridge line, and the same number of the main scale of both pipe connection parts. The universal joint is characterized in that, when combined with each other, the number represents the angle formed by both pipe axes and the position of the apex of the bend at each angle.