JPH022143Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a push ring for connecting water pipes buried underground, for example, and for preventing the connected pipes from separating.

(Prior art) To connect water pipes, as shown in Fig. 1, a press ring C and a rubber ring D are fitted into the insertion part B of one pipe A, and this insertion part B is connected to the other pipe A. Insert the rubber ring D into the socket F of the pipe E, connect the push ring C and the flange G of the socket F with bolts H and nuts I, and attach the rubber ring D to the socket D using the protrusion J of the push ring C. I'm trying to push it.

However, simply tightening the bolts H and nuts I is not enough to connect the pipes together, and there is a risk that the connection will separate due to external pressure such as earthquakes, ground subsidence, or wheel loads.

Conventionally, in order to prevent these from coming off, for example, as shown in Fig. 1, a push bolt L is screwed diagonally into an insertion part K formed on a push ring C, and its tip is directly pressed against the insertion part B of the pipe A. There is something like this. As another example of the detachment means, as shown in FIG.
There is also a type in which a piece M is screwed in vertically and a piece M is pressed against it with its tip, and this piece M presses the insertion part B of the tube A.

(Problems with the Prior Art) The one shown in FIG. 1 has the disadvantage that the pushing force is weak because the push bolt L directly pushes the pipe A.
Furthermore, since the tip of the push bolt L directly presses the pipe, there is also the problem that if the push bolt L is strongly tightened, force will be concentrated on the pressed part of the pipe, damaging the pipe A. Furthermore, since the push bolt L is only screwed in diagonally, there is also the drawback that the push bolt L is likely to loosen due to vibration or impact.

The one in Figure 2 is pressed by a push bolt L through the piece M, so it has a stronger pressing force than the one in Figure 1, and is less likely to loosen due to vibration or impact. When a detachment force is applied to the piece M, the piece M moves as shown by the temporary phase line, so the push bolt L tends to loosen, and since no special measures have been taken to prevent the push bolt L from loosening, vibrations and The disadvantage is that it is weak against impact. Furthermore, since the push bolt L is screwed perpendicularly to the pipe A, the diameter of the control hole to be dug in the ground must be made large, otherwise when tightening the push bolt L, your hand or the tightening tool will hit the circumference of the control hole. It becomes difficult to tighten. Therefore, the holes for management facilities must be made larger, making construction difficult.

(Purpose of the invention) The present invention eliminates these drawbacks and provides a push ring that can reliably prevent separation of pipes and that is easy to connect and install. Hereinafter, the present invention will be explained in detail based on the drawings from FIG. 3 onwards.

(Means for solving the problem) As shown in Fig. 3, the push ring of the present invention
A push ring body 1 that fits over the outer periphery of the push ring body 1, a push bolt 2,
A push bolt insertion part 7 is formed integrally with the main body 1 of the push ring body 1, and a push bolt insertion part 7 is inserted into the push ring body 1, penetrating in the direction of the front surface 8 and the back surface 5 of the push ring body 1. A hole 9 and a piece insertion hole 10 opening from the push bolt insertion hole 9 to the inside of the push ring body 1 are formed, and the push bolt pressing surface 12 of the push bolt insertion hole 9 extends from the front surface 8 side of the push ring body 1 to the back surface 5. The push bolt 2 has a bolt 14 integrally formed at the end of a piece pressing portion 13, and the push bolt 2 is formed into a tapered shape that gradually widens toward the side. The press receiving surface 11 to be pressed is tapered to match the taper of the press bolt pressing surface 12, and the pressing surface 17 corresponding to the piece 3 of the press bolt 2 is formed so that the piece 3 is against the outer peripheral surface of the pipe A. The nut 21 screwed onto the push bolt 2 is formed in a plane parallel to the axial direction of the tube A, and the push bolt insertion hole 9 is formed larger than the push bolt 2 so that the push bolt 2 can be pressed in a right angle direction. When tightened, the push bolt 2 is drawn toward the surface 8 of the push ring body 1, and is also pressed by the push bolt pressing surface 12 of the push bolt insertion hole 9 toward the piece 3 in the piece insertion hole 10 and moved in the same direction. , is characterized in that the top 3 is pressed against the tube A side.

(Function) To use the press ring of the present invention, for example, as shown in FIG.
The pressing part 19 of the press ring body 1 is attached with tape 20 or the like.
Temporarily fasten it.

In this state, fit the press ring body 1 and the rubber ring D into the insertion part B of the tube A, and insert the insertion part B into the other tube E.
Pass the connecting bolt H through the connecting bolt insertion hole 6 of the press ring body 1 and the bolt hole of the flange G of the pipe E, and tighten this bolt H with the nut I to connect the pipes A and E. In addition to connecting, the press ring body 1
The rubber ring D is pushed into the socket F by the protrusion 4.

Next, when the nut 21 screwed onto the push bolt 2 is tightened, the push bolt 2 is drawn toward the surface 8 side of the push ring body 1 (in the direction of arrow C in FIG. 3 and arrow X in FIG. 4). At this time, the pressing surface 11 of the push bolt 2 is pushed in the direction of the piece insertion hole 10 by the pressing bolt pressing surface 12 of the push bolt insertion hole 9 and moves in the same direction, and the pressing surface 17 of the push bolt 2 moves, The piece 3 is pushed inside the press ring main body 1 (in the direction of the tube A) and is pressed perpendicularly to the outer peripheral surface of the tube A.

(Example) The push ring main body 1 of the present invention is made of cast metal and has an annular shape, and a protrusion 4 for pushing the rubber ring D is formed in an annular shape on the back surface 5, and connection bolt insertion holes 6 are formed at uniform intervals. has been done. This push ring main body 1 has a push bolt insertion portion 7 projecting integrally with the main body 1 between the connection bolt insertion holes 6.

As clearly shown in FIGS. 3 and 4, this push bolt insertion part 7 has a push bolt insertion hole 9 that penetrates from the front surface 8 of the push ring body 1 to the back surface 5, and from this push bolt insertion hole 9 to the push ring body. A piece insertion hole 10 that opens on the inside of 1 (on the side of tube A) is formed.

The push bolt insertion hole 9 is a press receiving surface 11 of the push bolt 2.
A press bolt pressing surface 12 that presses the press bolt, and this pressing surface 1
Both side surfaces connected to the push ring body 1 are tapered to become gradually wider from the front surface 8 side to the back surface 5 side of the push ring body 1, and are made larger than the outer shape of the push bolt 2. By increasing the size in this way, when the nut 21 screwed onto the push bolt 2 is tightened, the push bolt 2 will move toward the surface 8 side of the push ring main body 1 (in the direction of arrow C in FIG. 3 and arrow X in FIG. 4). At the same time, the pressure receiving surface 11 of the push bolt 2 is pressed against the top insertion hole 10 by the push bolt pressing surface 12 of the push bolt insertion hole 9.
When pushed in one direction, the push bolt 2 also moves in the same direction.

Note that the both side surfaces connected to the pressing surface 12 do not necessarily have to be tapered.

As clearly shown in FIG. 5, the push bolt 2 consists of a piece pressing part 13 and a bolt 14 protruding forward thereof. It is tapered to match the shape of the bolt insertion hole 9.

The piece 3 is formed to be slightly smaller than the piece insertion hole 10, the receiving surface 18 that presses against the pressing surface 17 of the push bolt 2 protrudes slightly outward, and the pressing part 19 that presses the pipe A is formed into a serrated shape. It has been done.

(Effects of the invention) Since the invention is made as described above, it has various effects as described below.

(1) The push bolt 2 does not press the pipe A directly, but the push bolt 2 presses the pipe A through the piece 3 that is pressed by the tapered push bolt pressing surface 12 of the push bolt insertion hole 9, so the pressing force is is strong.

Furthermore, when the nut 21 screwed into the push bolt 2 is tightened, the push bolt 2 is not only drawn toward the surface 8 of the push ring body 1, but also pushed toward the piece insertion hole 10 and moved in the same direction. For,
The pressing force on the piece 3 by the push bolt 2 becomes particularly strong. By the way, when the pressing force of the present invention was compared with the pressing force of the press ring shown in FIG. 1, the pressing force of the present invention was about four times higher than the pressing force of the press ring shown in FIG.

In addition, in the present invention, the pressure receiving surface 11 of the push bolt 2
is tapered, but since the pressing surface 17 of the push bolt 2 is formed in a plane parallel to the axial direction of the tube A, the piece 3 is pressed against the outer peripheral surface of the tube A by the push bolt 2. It is pressed in the right angle direction, and the pressing force of the piece 3 against the tube A becomes even stronger.

(2) The push bolt 2 is pressed by the tapered push bolt pressing surface 12 of the push bolt insertion hole 9,
As a result, the push bolt 2 moves in the direction of the piece insertion hole 10 and presses the piece 3, and since the push bolt 2 is fixed at that moving position by tightening the nut 21, the push bolt 2 may be affected by vibrations or other damage. Even if external pressure is applied, the push bolt 2 does not loosen easily, and the pressure on the pipe A by the piece 3 does not loosen either.

(3) As shown in Figure 1, connect the pipe A with the push bolt 2.
Since the pressure is not applied directly at the tip of the tube A, but through the piece 3, there is no chance of local force being applied to the tube A, and there is little damage to the tube A.

(4) Because the pressing force is strong, it is possible to press tube A sufficiently without pressing piece 3 against tube A more strongly than necessary, and therefore, the tube is not distorted because no excessive force is applied to the tube. It is less likely to cause damage to the pipes.

(5) Since the pressing force is strong, there is no need to increase the pressing force for each push bolt so much.
A bolt with a small diameter can be used as the push bolt 2. In this way, the unit price of the push bolt 2 can be reduced, making it economical and lightweight.

(6) Since the pressing force is strong, the number of push bolts 2 can be reduced, and if this is done, the number of push bolt insertion parts 7 will also be reduced accordingly, making the push ring body 1 less expensive. Moreover, since it is lightweight, connection work becomes easier.

(7) Since the push bolt insertion hole 9 of the push bolt insertion part 7 is passed through in the insertion direction of the pipe A, the direction of the push bolt 2 inserted into this insertion hole 9 is the same as the insertion direction of the pipe A. become. Therefore, the tightening direction of the connecting bolt H connecting the two pipes and the push bolt 2
Since the tightening directions are the same, the work of connecting the pipes together and the work of pressing the piece 3 onto the pipe A become easier.

(8) The press bolt receiving surface 11 of the push bolt 2 and the press bolt pressing surface 12 of the push bolt insertion hole 9 are tapered so that they gradually become wider in the opposite direction from the insertion side of the pipe A. Natsu 2 screwed into
When tightening 1, I have never been injured if my hand hits the peripheral wall of the pipe burying hole like the push ring in Figure 3. Therefore, the work of tightening the nut 21 becomes easier.
In addition, since it has never been necessary to make the management hole much larger than the outer diameter of the pipe A as in the push ring shown in Figure 3, the construction is easy and the construction cost is low.

[Brief explanation of drawings]

Figures 1 and 2 are explanatory diagrams of a conventional press ring, and Figure 3 shows an example of the press ring according to the present invention, in which A is a partial front view, B is a partially cutaway cross-sectional view, and C is a partially cutaway cross-sectional view. FIG. 4 is an explanatory view of the main parts of the push ring of the present invention, FIG. 5 is an example of a push bolt that is a component of the push ring of the present invention, and A is a side view. , B is a right side view, FIG. 6 is an explanatory diagram showing an example of a piece that is a component of the push ring according to the present invention, and FIG. 7 is an explanatory diagram for using the push ring according to the present invention. 1 is the push ring body, 2 is the push bolt, 3 is the piece, 4 is the protrusion, 5 is the back side, 7 is the push bolt insertion part, 8 is the front surface, 9 is the push bolt insertion hole, 10 is the piece insertion hole, 1
1 is a pressure receiving surface, 12 is a press bolt pressing surface, 21 is a nut, and A is a pipe.

Claims (1)

[Scope of utility model registration request] A push ring body 1 that fits on the outer periphery of the pipe A to be connected;
Consisting of a push bolt 2 and a piece 3, a push bolt insertion portion 7 is formed integrally with the push ring body 1, and a surface 8 of the push ring body 1 is formed in the push bolt insertion portion 7.
A push bolt insertion hole 9 penetrating in the rear surface 5 direction, and a piece push hole 10 opening from the push bolt insertion hole 9 to the inside of the push ring body 1 are formed, and the push bolt pressing surface 12 of the push bolt insertion hole 9 is formed. Surface 8 of push ring body 1
The push bolt 2 is formed into a taper that gradually becomes wider from the side toward the rear surface 5 side, and the push bolt 2 is integrally formed with a bolt 14 at the tip of the piece pressing part 13. The pressing surface 11 pressed by the pressing surface 12 is tapered to match the taper of the pressing bolt pressing surface 12, and the pressing surface 17 that presses against the piece 3 of the pressing bolt 2 is formed so that the piece 3 is the pipe A is formed in a plane parallel to the axial direction of the tube A so that it can be pressed in a direction perpendicular to the outer peripheral surface of the tube A,
By forming the push bolt insertion hole 9 larger than the push bolt 2, when the nut 21 screwed into the push bolt 2 is tightened, the push bolt 2 is drawn toward the surface 8 of the push ring body 1, and the push bolt is removed. The piece insertion hole 10 is pressed by the push bolt pressing surface 12 of the insertion hole 9.
A push ring characterized in that it is pressed against the inner piece 3 side and moved in the same direction to press the piece 3 against the outer periphery of the pipe A.