JP3166687B2 - Structure of pipe connection - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a pipe connecting portion which connects one pipe and another pipe constituting a pipe.

[0002]

2. Description of the Related Art Pipes such as sewers are formed by connecting pipes made of a resin such as vinyl chloride resin, and the pipes constituting the pipes include two or more pipes. There are also tubs that are connected to the part where they join or where the pipe diameter or pipe type changes.

[0003] Such a tube generally has a structure having a socket and a port, and a port formed in one tube is inserted into the port of the other tube. To connect
The mutual pipes are connected and fixed between the inner peripheral surface of the receiving port and the outer peripheral surface of the insertion port via a waterproof ring made of an adhesive or rubber.

However, the structure in which the pipes are fixed to each other by means of bonding or the like as described above and connected to each other results in a rigid structure in which the pipes have no flexibility, and If the pipes are buried and an external load is applied to the pipes by these pipes, that is, if an earthquake or the like occurs, problems such as damage to the pipes themselves or the connection between the pipes may occur. Had disadvantages.

Heretofore, in order to solve the above-mentioned drawbacks, a connection structure has been devised in which the other pipe connected to the socket of one pipe can swing within a predetermined angle range. ing.

In this conventional connection structure, the shape of the receiving portion of one of the pipes is formed to be widened, and a waterproof rubber ring is mounted on the inner peripheral surface near the opening of the receiving portion. The insertion opening of the other tube is inserted and inserted via a water rubber ring,
With the waterproof rubber ring as a fulcrum, the other tube is configured to be swingable with respect to the receiving portion of the one tube.

[0007] With respect to an external load in a direction substantially perpendicular to the pipe axis direction, the other pipe swings with respect to one pipe, so that the load is absorbed at the connection portion. The connection portion and each tube are prevented from being damaged.

[0008]

However, the above-described conventional connection structure between pipes has a structure capable of coping with an external load only in a direction substantially perpendicular to the pipe axis direction, that is, in a bending direction. Therefore, it is impossible to cope with an external load other than the load in such a direction, that is, when a load is applied in the same direction as the pipe axis direction, that is, when a load such as an earthquake is received in the same direction as the pipe axis direction. For example, if the above-mentioned connection structure is configured with one tube as a square and the other tube as a branch, the mouth of the branch will enter the mouth of the square, and the inside of the square will be damaged. There was a risk of doing.

Further, according to the above-described conventional connection structure,
Since the receiving port has a deeply extending structure, it is difficult to form the receiving port.Furthermore, a space is created around the distal end portion of the branch pipe connected to the receiving port, and as a conduit, When forming the sewer, there is a drawback that a problem such as attachment of dirt or the like occurs.

[0010] In order to solve the above problems, the present invention provides a method for connecting pipes when an external load such as an earthquake is applied to the pipes in the same direction as the pipe axis. In addition to providing a structure that does not damage the tube itself, the connection structure is reduced in size, and a tube connection structure that can cope with a load applied to this connection in the bending direction is provided. It is intended to be.

[0011]

Next, means for solving the above problems will be described with reference to the drawings corresponding to the embodiments. According to the structure of the pipe connecting portion of the present invention, the insertion port 25a of the other pipe 25 is inserted into the receiving port 12 of the one pipe 11 constituting the pipe via the elastic water stop ring 19. In addition, the receiving port 12 of the one tubular body 11 is formed to have a large inner diameter having a gap allowing a change in a direction perpendicular to the axis of the insertion port 25a of the other tubular body 25. In the structure of the pipe connection portion, the one pipe 11
Of the other tubular body 25
A positioning piece 21 having flexibility that comes into contact with the outer peripheral surface of the halfway portion on the 5a side, and the insertion port 25 of the other pipe 25 is maintained so that the gap near the opening edge of the reception port maintains a predetermined distance.
a positioning ring 20 for positioning a.

Further, the structure of the pipe connecting portion of the present invention is such that an insertion port 25a of one pipe 11 and an insertion port 25a of the other pipe 25 constituting a pipe are provided with an elastic waterproof ring 19. In the structure of the tube connecting portion which is inserted and connected through the pipe, the dimensional difference between the inner diameter of the receiving port 12 of the one pipe 11 and the outer diameter of the insertion port 25a of the other pipe 25 is different. The gap length in the connection state between the inner peripheral surface 12a of the receiving port of the one tubular body 11 and the outer peripheral surface of the insertion opening of the other tubular body is set to be larger than the dimensional difference set by the predetermined nominal diameter. , The insert 2
A receiving port 12 of the one pipe 11 having an inner diameter larger than the insertion port 25a so as to allow a gap in a direction perpendicular to the axis of the pipe 5a; Of the other tubular body 25
an opening 25a of the other tubular body 25 having a positioning piece 21 having flexibility that comes into contact with the outer peripheral surface of the a-side middle portion so that the gap near the opening opening edge keeps a fixed distance;
And a positioning ring 20 for positioning the position.

Further, the structure of the tube connecting portion of the present invention is as follows.
The other tube 2 attached to the receiving port 12 of one of the pipes 11 constituting the pipe, and inserted and connected to the receiving port 12.
5, the insertion port 25a of the other tubular body 25 moves in the axial direction when the insertion port 25a receives a load in the insertion direction with respect to the receptacle 12 and is damaged. It is characterized in that it has a buffer cylinder 1 that can be freely adjusted.

Further, the structure of the pipe connecting portion of the present invention is such that the water inlet ring 12a of one of the pipes 11 and the insertion port 25a of the other pipe 25 constituting the pipe are provided with an elastic water-stop ring 19. Is inserted and connected via the
In the structure of the tube connecting portion in which the receiving port 12 is formed to have a large inner diameter having a gap allowing a change in a direction perpendicular to the axis of the insertion port 25a of the other pipe 25, A flexible positioning piece 21 which is attached to a receiving opening edge of the body 11 and is in contact with an outer peripheral surface of a halfway portion of the other tubular body 25 on the side of the insertion opening 25a; A positioning ring 20 for positioning the insertion opening 25a of the other tube 25 so that the gap is kept at a fixed distance; and a positioning ring 20 attached to the inside of the receiving opening 12 of the one tube 11, and the other tube 25 When the insertion port 25a receives a load in the insertion direction with respect to the receptacle 12, the insertion port 25a of the other tube 25 is movable in the axial direction. And a shock-absorbing cylinder 1.

Further, the structure of the pipe connecting portion of the present invention is such that the water inlet ring 12a of one of the pipes 11 and the insertion port 25a of the other pipe 25 constituting the pipe are provided with an elastic waterproof ring 19. In the structure of the tube connecting portion that is inserted and connected through the tube, a dimensional difference between the inner diameter of the one tube 11 and the outer diameter of the insertion port 25a of the other tube 25 is a predetermined nominal value. The one pipe 1 is set to be larger than the dimensional difference set by the diameter.
1 so that the gap length in the connection state between the inner peripheral surface 12a of the socket 1 and the outer peripheral surface of the insertion opening of the other tube 25 is set to be a gap that allows a change in the direction perpendicular to the axis of the front insertion opening 25a. The one tubular body 1 formed to have an inner diameter larger than the insertion opening
1 receiving port 12 and a positioning piece 21 having flexibility which is attached to the receiving port opening edge of the one tubular body 11 and abuts on the outer peripheral surface of a halfway side of the other tubular body 25 on the side of the insertion port 25a. Have
A positioning ring 20 for positioning the insertion opening 25a of the other tube 25 so that the gap in the vicinity of the opening opening edge keeps a fixed distance;
The insertion end 2 of the other tubular body 25
5b, when the insertion port 25a receives a load in the insertion direction with respect to the receiving port 12, the insertion port 25a of the other tube 25 is broken and the insertion port 25a of the other tube 25 is movable in the axial direction. And a cylinder (1).

The buffer cylinder 1 is provided with the one tube 1
1 is formed in a cylindrical shape to be attached to the back inside the receiving port 12, and an insertion end 25 b of the other tube 25 is formed at one end opening.
And a locking projection 8 that engages with the step 15 on the other side of the receptacle on the outer peripheral surface 2c at the other end, and is inserted in the insertion direction with respect to the receptacle 12. When the load is applied to the insertion port 25a, the locking projection 8 may be damaged so that the insertion port 25a of the other tube body 25 is movable in the axial direction.

The buffer cylinder 1 is provided with the one tubular body 1.
1 has a plurality of grooves 3 formed at least in the circumferential direction on the outer peripheral surface 2c, and one opening of the other tubular body 25 is formed in the outer peripheral surface 2c. When the insertion port 25 receives a load in the insertion direction with respect to the reception port 12 while holding the insertion port tip 25b, the peripheral surface portion is damaged by the groove 3 and the insertion of the other tube 25 is performed. The port 25a may be configured to be movable in the axial direction.

Further, the shock-absorbing cylinder 1 is formed in a cylindrical shape to be mounted at the back inside the receiving port 12 of the one tubular body 11,
At one end 2a opening, a holding portion 5 for holding the insertion tip 25b of the other tube body 25 is provided, and on the outer peripheral surface 2c of the other end 2b, the step portion 15 at the back of the socket 12 is provided. It has, for example, a flange-shaped locking projection 8 to be engaged, and
The outer peripheral surface 2c has a groove 3 formed at least in the circumferential direction, and when the insertion port 25 receives a load in the insertion direction with respect to the receptacle 12, the peripheral surface portion is damaged by the groove 3. Alternatively, the insertion opening 25a of the other tube body 25 may be configured to be movable in the axial direction when the locking projection 8 is damaged.

The positioning ring 20 has a structure in which a rib 23 for supporting a connection state between the receiving port 12 of the one pipe 11 and the insertion port 25a of the other pipe 25 is formed. Is also good.

Further, the one tubular body 11 may have a structure composed of a tub such as a merging pit, for example, which is a portion where a plurality of pipes are joined. In this case, a plurality of receiving ports formed in the pit are provided. It is preferable that the inner diameter is formed as described above, and the positioning ring 20 and the buffer cylinder 1 are provided in each of the receiving ports 12.

With such a structure, one of the tubes 11
By attaching the positioning ring 20 to the other, when connecting the other tube body 25, the connection can be easily performed by aligning the respective tube axes.

Further, the shape of the receiving port 12 of one of the pipes 11 is configured to be larger than the outer diameter of the insertion port 25a of the other pipe 25, and the inner diameter of the receiving port 12 is determined by the insertion diameter. Mouth 25
The gap 25a is allowed to vary in the direction perpendicular to the axis of a, and the gap length in the connection state between the inner peripheral surface of the receptacle and the outer peripheral surface of the insertion port is set to be large. , And can respond to external loads such as earthquakes.

Further, by forming a structure in which the buffer cylinder 1 is attached to this connection portion, the receiving port 12 of the one tubular body 11 is formed.
In contrast, when the insertion opening 25a of the other tube body 25 receives an external load such as an earthquake in the insertion direction, the shock absorber cylinder 1
Is damaged or damaged, so that the opening 25 of the other tubular body 25 is inserted.
a can be moved in the insertion direction, and the fluctuation due to the load can be reduced.

In particular, the groove 3 is formed on the outer peripheral surface 2c of the buffer cylinder 1.
Is formed, the peripheral surface portion is damaged or damaged in the groove portion 3 and the insertion port 25 of the other tube body 25 is formed.
a can be moved in the insertion direction, and the fluctuation due to the load can be reduced.

Since the shock-absorbing cylinder 1 is mounted, the front end 25b of the insertion port 25a is held by the shock-absorbing cylinder 1, and in this state, the front end 25b of the insertion port 25a is held.
The swing can be performed with the b portion as a fulcrum, so that even if the fluctuation due to an external load such as an earthquake is in the bending direction with respect to the tube axis direction of the other tube 25, the two tubes 11, 25 are bent.
Does not cause distortion or bending.

Further, by forming the ribs 23 on the positioning ring 20, the connection state between the receiving port 12 of the one pipe 11 and the insertion port 25a of the other pipe 25 is supported. When connecting 25, for example, it is possible to easily bring the pipe axes into a state where they are aligned, and it is possible to maintain the state where the pipe axes are aligned.

[0027]

FIG. 1 is a cross-sectional view of an embodiment of the structure of a tube connecting portion according to the present invention, and FIG. 2 is an embodiment of a positioning ring constituting the structure of the tube connecting portion of the present invention. FIG. 3 is a side view showing an embodiment of the shock-absorbing cylinder constituting the structure of the pipe connecting portion of the present invention.

The structure of the pipe connecting portion according to the present embodiment is substantially constituted by a positioning ring 20, a water stop ring 19, and the buffer cylinder 1.

In this embodiment, the tub 11 is an intermediate part of the pipe constituting the sewer pipe, and
And the structure at the connection part with the branch pipe 25 as the other pipe body will be described.

As shown in FIG. 1, the tub 11 has an inlet 12 for inflow to which a pipe such as a straight pipe 25 is connected to the side of the tub body. An outlet 13 having a diameter larger than 25 has a substantially opposing position, and a large-diameter connection port 1 connected upward to the cleaning port tube.
4 are formed.

As shown in FIG. 6, the inflow port 12 is
It is formed in a substantially straight tubular shape having a slightly larger diameter than the insertion port 25a of the branch pipe 25 connected to the tub 11, and has an inner diameter in the back of the inner peripheral surface 12a, that is, in the vicinity of the inflow port 16 opening in the tub. A narrowing step 15 is formed.
Is formed to be substantially equal to the outer diameter of the insertion opening 25a.

The shape of the inflow port 12 will be described in detail. The insertion port 2 of the branch pipe 25 inserted and connected to the inflow port 12 is described.
The dimensional difference between the outer diameter of 5a and the inner diameter of the inflow port 12 is
When the nominal diameter is set to, for example, 100, a dimensional difference (approximately 0.5 m), which is a clearance in a connection state between the inner diameter of the receptacle 12 and the outer diameter of the insertion port 25a of the nominal diameter.
m) is set to be larger than the dimensional difference (about 5 mm). In this embodiment, the inner diameter of the inflow port 12 is sufficiently larger than the outer diameter of the insertion port 25a set to the nominal diameter 100. The inlet 12 and the inlet 25 are set to have a large diameter.
a in such a manner that the gap length between the inner peripheral surface 12a of the inflow receiving port 12 and the outer peripheral surface of the insertion port of the branch pipe 25 in the connection state with the insertion port 25a is allowed to vary in the direction perpendicular to the axis of the insertion port 25a. The inner diameter is larger than the opening 25a.

In the vicinity of the opening of the inflow port 12,
The bulging portion 18 is formed so that the groove portion 17 is formed on the inner peripheral surface 12a.
Is formed, and a water stop ring 19 described later is mounted in the groove 17.

Further, a protrusion 12b for positioning a mounting position of the buffer cylinder 1 described later is formed on a step portion 15 at a depth of the inner peripheral surface 12a of the inflow port 12 of the box 11.

Next, the positioning ring 20 is made of a material such as a resin having flexibility and elasticity, and is formed into a short cylindrical shape having an inner diameter equal to the outer diameter of the opening edge of the inflow port 12. As shown in FIG. 2, a positioning piece 21 having a substantially L-shaped cross section is formed at one opening edge.
Are extended toward the center, and are formed in a substantially U-shaped cross section together with the positioning piece 21.

The positioning ring 20 is shown in FIG.
As shown in (1), it is mounted on the opening edge of the inflow port 12 so as to cover this edge, and the tip of each positioning piece 21 is directed to the inside of the inflow port 12.

The inner diameter formed by the positioning pieces 21 is set to the same diameter as the outer diameter of the insertion port 25a of the branch pipe 25, that is, the extension length of each positioning piece 21 is formed equal. .

As shown in FIGS. 2A and 2B, a plurality of ribs 23 are formed on the lowermost positioning piece 21 of each positioning piece 21. Only 21 is configured to be hardly bent downward.

Next, the water stop ring 19 is made of an elastic material such as synthetic rubber. In this embodiment, as shown in FIG. 1, the inner periphery of an endless annular main body 19a having a substantially rectangular cross section is used. The surface is formed in a substantially F-shaped cross section or a substantially C-shaped cross section having a contact piece 19b that curves and extends from the insertion side to the back in the state where the receptacle 12 is mounted.

The branch pipe 2 at the tip of the contact piece 19b
The inner diameter when the insertion opening 25a of No. 5 is not inserted is:
The diameter is smaller than the outer diameter of the insertion port 25a, and is formed to extend toward the center, and is longer than the maximum length of the gap between the inner peripheral surface 12a of the inflow receiving port 12 and the outer peripheral surface of the insertion port 25a. The opening 25a is formed to be longer than the maximum length of the gap between the inner peripheral surface 12a of the inflow port 12 and the outer peripheral surface of the insertion port 25a, which fluctuates when swinging under a load. Are formed so as to extend in the center direction longer than the difference between the inner diameter of the branch pipe 25 and the outer diameter of the insertion port 25a of the branch pipe 25.

Next, as shown in FIGS. 1 and 3 to 5, the buffer cylinder 1 is formed of, for example, a synthetic resin and has a substantially cylindrical main body 2 and one end 2 a of the main body 2. It is roughly constituted by a holding portion 5 formed at the opening and a locking projection 8 formed at the other end 2b.

The main body 2 is formed to have substantially the same diameter as the outer diameter and inner diameter of the insertion port 25a of the branch pipe 25. As shown in FIG. 3, the outer peripheral surface 2c has an annular groove having a substantially V-shaped cross section. 3
Are formed at substantially equal intervals from each other, that is, as shown in FIG. 5, the trapezoidal cross section has a structure in which the bottoms are connected in parallel to form a tube wall.

As shown in FIG. 3, a plurality of grooves 4 having substantially the same V-shaped cross section as the grooves 3 are formed in the same direction as the axial direction.

The depth of each of the grooves 3 and 4 is set to an appropriate length less than the thickness of the tube wall of the main body 2.
Can be broken.

The holding portion 5 is formed to have a larger diameter than the main body 2 and is provided so as to extend in the axial direction from an opening of one end 2 a of the main body 2, and the outer diameter is substantially equal to the inner diameter of the inflow port 12. The distal end portion 25 of the insertion port 25a of the branch pipe 25 is formed to have the same diameter.
The insertion hole 25a is formed in a receiving shape having an inner diameter substantially the same as the outer diameter of the insertion opening 25a so as to be inserted therein, and has a tapered surface 6 on the inner peripheral edge of the opening.

As shown in FIG. 3, small locking projections 7 are formed on the outer peripheral surface 5a of the holding portion 5 at substantially equal intervals in the circumferential direction, for example, at 90 ° intervals with respect to the axis. ing.

The locking projection 8 is formed in a flange shape on the outer peripheral surface 2 c at the other end 2 b of the main body 2, and the outer diameter of the outer peripheral surface is substantially equal to the inner diameter of the inflow port 12. They have the same diameter.

The locking projection 8 has a substantially rectangular cross section as shown in FIG. 5, and a substantially V-shaped groove 9 is formed at the boundary with the outer peripheral surface 2c of the main body 2 at the end. Have been. As shown in FIG. 4, a notch 10 is formed in a part of the locking projection 8 at the lower end.

The buffer cylinder 1 is connected to the other end 2b.
Is inserted into the inflow port 12 of the box 11 so that the locking projection 8 is provided on the outer periphery of the other end 2 b so that the bottom of the inflow port 12 is formed. Step 1
5 and is attached to the back of the inflow port 12.

At the time of this mounting, the notch 10 formed in the locking projection 8 and the projection 12b in the inflow receiving port 12 are fitted to each other to perform positioning, and at the same time, each engagement of the outer peripheral surface 5a of the holding part is performed. The stopper projection 7 is fitted into the inflow receiving port inner peripheral surface 12a in a substantially press-fit state.

The shock absorber cylinder 1 according to the present embodiment is
Is set to a length of about ５〜 to の of the axial length of the inflow port 12 of the box 11, and the position of the holding portion 5 is set to the stepped portion of the inflow port 12. It is mounted so as to be located at a substantially intermediate position between the ring 8 and the water stop ring 19.

Therefore, when the branch pipe 25 is connected to the box 11, the insertion port 25 a of the branch pipe 25 is inserted into the inflow port 12 of the box 11. The insertion positions of the positioning pieces 21 of the positioning ring 20 are brought into contact with each other so that the pipe axes thereof coincide with each other, and the contact piece 19b of the water stop ring 19 is provided on the outer peripheral surface of the insertion port 25a halfway. The distal end 25b of the insertion opening 25a is fitted into the holding portion 5 of the buffer cylinder 1, and the holding portion 5
And the branch pipe 25 and the basin 11 are connected to each other through the insertion port 25a and the inflow receiving port 12 via the buffer cylinder 1 (see FIG. 6).

At this time, since the rib 23 is provided on the lowermost positioning piece 21 of the positioning ring 20, the lowermost positioning piece 21 does not bend due to the weight of the branch pipe 25, and The connection is made substantially accurately so that the insertion opening 25a is positioned, that is, the tube axis is aligned.

According to the structure of the connecting portion between the branch pipe 25 and the tub 11, an external load, that is, an earthquake or the like is generated in the pipe provided with the connecting structure, and the pipe 25 and the tub 11 are connected. If a change is received, the change is made in a direction perpendicular to the axis of the insertion port, that is, in a direction of bending with respect to the pipe axis direction of the branch pipe 25, as shown in FIG.
The inflow port 12 has a large inner diameter to allow the variation, and the branch pipe 25 is moved to the position of the holding portion 5 of the buffer cylinder 1 with respect to the tub 11 according to the variation. In the present embodiment, the pivoting portion 25b pivots in a range of about 5 ° with respect to the axis.
And without causing distortion or the like to the square 11.
There is no damage to the branch pipe 25, the box 11, and the connecting portion thereof.

As shown in FIG. 7, when the branch pipe 25 swings with respect to the box 11, the water-stop ring 19 is elastically deformed over the entire circumference, so that the water-tight ring 19 is kept in close contact with the outer peripheral surface of the branch pipe 25 in the middle. That is, the watertightness can be maintained, and the positioning ring 20 does not hinder the swing of the branch pipe 25 because the positioning piece 21 is elastically deformed.

It should be noted that, as shown in FIG.
The connection state with each other is set such that their axes are substantially horizontal, or the insertion port 25a side is obliquely upward with respect to the reception port 12 side, and the connection state of the insertion port 25a with respect to the reception port 12 is determined by a positioning ring. Since the ribs 23 of 20 support the insertion opening 25a, even if the axis of the box 11 and the branch pipe 25 at this connection portion is subjected to an external load that may be bent as described above. The rib 23 prevents the insertion opening 25a from being obliquely downward with respect to the reception opening 12, that is, without having an inverse gradient.
And the branch pipe 25 do not form a stagnation portion.

When the direction of the fluctuation is the same direction as the pipe axis direction of the branch pipe 25 and the direction in which the branch pipe 25 is separated from the box 11, the insertion end 25b of the branch pipe 25 is Although it moves in a direction to separate from the holding portion 5, since the insertion end 25 b of the branch pipe 25 is inserted into the inflow receiving port 12 for a sufficient length, it slides with respect to this inflow receiving port 12. , To absorb the fluctuation. Also at this time, since the water blocking ring 19 is in close contact with the outer peripheral surface of the insertion opening 25a of the branch pipe 25, watertightness can be maintained.

Further, the direction of the above fluctuation is the same direction as the pipe axis direction of the branch pipe 25, and the direction in which the branch pipe 25 approaches the box 11, that is, the insertion port 25a of the branch pipe 25 is the inflow receiving port 1
When a load is received in the direction of insertion into the inlet 2, the insertion end 25 b of the branch pipe 25 enters the inflow reception port 12.

Then, the insertion end 25b of the branch pipe 25 presses the holding portion 5 of the buffer cylinder 1, and the load of the fluctuation is transmitted to the buffer cylinder 1.

Then, the buffer cylinder 1 is buckled and damaged at the positions of the grooves 3 and 4 in the circumferential direction and the axial direction, and as shown in FIG. Thus, the insertion port 25a of the branch pipe 25 moves in the pipe axis direction together with the holding section 5.

Further, even when the locking projection 8 provided on the other end 2b of the buffer cylinder 1 is damaged by the groove 9,
By disengaging the inflow receiving port 12 from the stepped portion 15, the load is reduced, and the branch pipe 25 can be moved.

Thus, the occurrence of distortion or the like in the branch pipe 25 and the box 11 is suppressed, and the branch pipe 25, the box 11 itself, and a connection portion thereof are not damaged.

The buffer cylinder 1 damaged in each of the grooves 3 and 4
The peripheral surface portion which has become a fragment having a substantially trapezoidal cross section flows down into the tub 11.

Further, the load of the fluctuation is reduced by the locking projection 8 of the buffer cylinder 1.
If only the locking projection 8 is damaged,
The buffer cylinder 1 releases the engagement state with the step 8 of the inflow receiving port 12, and the branch pipe 25 moves to the back of the box 11, and the other end 2 b side of the buffer pipe 1 is connected to the box 11. However, in this case, the wall of the buffer cylinder 1 protruding from the connection port 14 above the box 11 is beaten or the like to promote the damage by the groove 3 and the buffer cylinder 1 To remove the protruding part of

In the above-described embodiment, the buffer cylinder 1
At one end and the other end 2a, 2b,
Although the shape of the opening having a substantially circular shape has been described, as shown in FIG. 9, when the shape of the inflow port 12 in the box is inclined at the joint portion with the box body, this buffer cylinder is used. A guide wall 22 along the inner opening edge of the inflow port 12 of the box may be formed at the other end 2b of the container 1 so as to extend from the main body 2, and the opening may have an elliptical shape. .

Further, in the above-described embodiment, an example is described in which one inflow port 12 is provided for the cell body. However, as shown in FIG. 9, a plurality of inflow ports 12 are formed in the cell. The same applies to the above, that is, the positioning ring 20, the water blocking ring 19, and the buffer cylinder 1 are attached to each of the inflow ports 12 respectively.

Further, in the above-described embodiment, an example has been described in which a plurality of grooves 3 formed on the outer peripheral surface 2c of the buffer cylinder 1 are formed in parallel in the circumferential direction, but they may be formed in a continuous spiral shape. Further, a large number of nets may be formed in the circumferential direction and the axial direction.

Also, in the above-described embodiment, the dimensional difference between the inner diameter of the inflow port 12 of the box 11 as one pipe and the outer diameter of the insertion port 25a of the branch pipe 25 as the other pipe is determined. , The inlet 25a has an outer diameter having a predetermined nominal diameter, and the inner diameter of the inflow receiving port 12 is formed to have a large inner diameter different from the nominal diameter. The present invention is limited to the above-described embodiment as long as it is formed so as to be set with a sufficient gap that allows a change in the direction perpendicular to the axis of the port 25a and the inner diameter of the receiving port 12 is set. is not.

Furthermore, in the above-described embodiment, the buffer cylinder 1 is mounted on the tube 11 which is one of the tubes, and the buffer tube 1 is interposed at the connection portion with the branch tube 25 which is the other tube. It is not limited to the connection part between the pipe and the branch pipe, but may be configured as a connection part between pipes such as a straight pipe.

[0070]

As described above, according to the structure of the pipe connecting portion according to the present invention, the positioning ring is attached to the receiving port of one of the pipes, so that the receiving port is connected to the other port. When the insertion holes are inserted and connected, the positions of the insertions are aligned with each other by the positioning pieces of the positioning ring.

Further, the positioning ring is provided with a flexible positioning piece, and the receiving port of one of the tubes to which the positioning ring is attached is connected to the other pipe connected to the receiving port. Due to the inner diameter having a gap that allows fluctuation in the direction perpendicular to the axis of the body insertion port, external loads are applied to the pipeline including the connection part between these reception port and the insertion port In addition, the positioning piece is deformed and bent in the bending direction or the like in response to the fluctuation due to the load, thereby preventing the occurrence of distortion and the like in both pipe bodies and absorbing the fluctuation.

Further, a buffer tube is mounted in the receiving opening of one of the tubes, and the opening of the other tube is connected through the buffer tube to form a pipe. When an external load, i.e., an earthquake, occurs in a pipeline, and one or the other of the tubes undergoes a change, and the change is made to be the bending direction with respect to the tube axis direction of the other tube. Follows the fluctuation, the other tube swings with respect to the one tube at the position of the holding portion in the buffer cylinder with the insertion tip end as a fulcrum, and the one tube and the other This does not cause distortion or the like to the tube body, and does not damage the one tube body, the other tube body, and the connecting portion thereof.

When the direction of the fluctuation is the same as the tube axis direction of the other tube and the direction in which the other tube approaches the one tube, that is, the insertion direction,
The insertion end of the other tube enters the inflow reception port, but the insertion end of the other tube presses the buffer tube, and the load of the fluctuation is applied to the buffer tube. As a result, the shock-absorbing cylinder damages the peripheral surface of the shock-absorbing cylinder, absorbs and absorbs the load caused by the fluctuation, and the insertion port of the other pipe can be moved in the pipe axis direction.
As a result, the insertion of the other tube does not cause damage to the one tube, and the occurrence of distortion or the like in the one tube and the other tube is suppressed. The effect of not damaging the tubes and their connecting portions is obtained.

In particular, by providing at least a plurality of grooves in the circumferential direction on the outer peripheral surface of the shock absorber cylinder, buckling damage easily occurs at the position of each groove, and the load due to the above fluctuation is effectively reduced, and the mutual load is effectively reduced. It is possible to prevent the tube from being damaged.

Further, if the buffer cylinder is provided with a locking projection and is configured to be engaged with a step in the socket of one of the pipes, the load in the same direction as the pipe axis direction of the other pipe is provided. When this is greatly added, this locking projection will be damaged,
The engagement state of the buffer cylinder with the step portion of the inflow receiving port is released, so that the load due to the fluctuation is relieved, and the other pipe can be moved. The distortion and the like of the body and the other tube are suppressed, and the effect of not damaging the one tube, the other tube, and the connecting portion thereof is obtained.

Further, according to the above-mentioned shock-absorbing cylinder, since the front end of the insertion port is held and this front end is used as a fulcrum of swinging, there is no space around the insertion port at the back of the receiving port. Thus, since no stagnation portion is formed as a conduit, even when a sewage system or the like is configured, no adhesion of dirt or the like occurs.

Further, according to the shock-absorbing cylinder constituting the structure of the tube connecting portion of the present invention, the insertion port tip is held, and the tip is used as a fulcrum for swinging. Since the receiving port is formed to have an acceptable inner diameter, the receiving port does not have a configuration in which the inner side has an enlarged diameter as in the related art, and the forming of the receiving port becomes easy. By applying to a basin, it becomes possible to obtain an earthquake-resistant basin.

Further, by providing the positioning ring with ribs, the connection between the receiving port of the one pipe and the insertion port of the other pipe is supported, and the two pipes are connected. In such a case, it is possible to easily bring the axes into alignment with each other, and to maintain the state in which the pipe axes are aligned.

In particular, in a connection structure in which one of the pipes and the other pipe are connected to each other with their axes parallel to each other or in a connection structure in which the insertion side is obliquely upward with respect to the reception side. Since the rib of the positioning ring supports the insertion port, the connection state of the insertion port with respect to the receiving port can be set to a state where the axes are aligned with each other, and the axes of both pipes are bent at this connection portion. Even if an external load is applied, the rib does not cause the insertion port to be obliquely downward with respect to the reception port, that is, does not have an inverse slope, and the stagnation portion formed by both pipes Is not formed.

Further, the connection structure of the pipes provided with the positioning ring and the buffer cylinder, respectively, allows the pipe having the connection structure to cope with a change in any direction. This makes it possible to construct a pipeline having an earthquake-resistant pipe connecting portion.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an embodiment of a structure of a tube connecting portion according to the present invention.

2A is a rear view showing an embodiment of a positioning ring according to the present invention. FIG. 2B is a sectional view taken along line II-II in FIG.

FIG. 3 is a side view showing an embodiment of a shock-absorbing cylinder according to the present invention.

FIG. 4 is a rear view of the shock absorber cylinder.

FIG. 5 is a sectional view taken along line VV in FIG. 4;

FIG. 6 is a cross-sectional view showing the structure of the pipe connecting portion.

FIG. 7 is an explanatory view of an operation based on the structure of the pipe connecting portion.

FIG. 8 is an explanatory diagram of the operation.

FIG. 9 is a cross-sectional view of a box provided with a structure of a pipe connecting portion according to another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Buffer cylinder 2c ... Outer peripheral surface 3 ... Groove part 5 ... Holding part 8 ... Locking convex part 11 ... One pipe (box) 12 ... Receiving port (inflow receiving port) 12a ... Inner peripheral surface 15 ... Step part 19 ... Water stop ring 20 ... Positioning ring 21 ... Positioning piece 23 ... Rib 25 ... The other tube (branch) 25a ... Entrance 25b ... End

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-56-6984 (JP, A) JP-A-4-331890 (JP, A) JP-A-5-9969 (JP, A) Jpn. 15654 (JP, U) Fully open Hei 3-93679 (JP, U) Fully open 1986-36790 (JP, U) Fully open 1979-103628 (JP, U) Fully open 1986-55577 (JP, U) Japanese Utility Model Application Hei 4-87090 (JP, U) Japanese Utility Model Application Hei 4-92086 (JP, U) (58) Fields surveyed (Int. Cl. ⁷ , DB name) F16L 27/10 F16L 27/12

Claims (10)

(57) [Claims] 1. An insertion port of the other pipe body is inserted and connected to a receiving port of one of the pipe bodies forming a pipe via an elastic waterproof ring, and the one of the pipe bodies is connected. The mouth of
In the structure of the pipe connecting portion formed to have a large inner diameter having a gap allowing a change in a direction perpendicular to the axis of the insertion port of the other pipe body, the pipe body is attached to a receiving opening edge of the one pipe body. The other tube has a flexible positioning piece that abuts on the outer peripheral surface of the halfway portion on the insertion side of the other tube body, and the other of the other tube is maintained such that the gap in the vicinity of the opening opening edge keeps a certain distance. A positioning ring for positioning an insertion opening of the tube, and a tube connecting portion structure. 2. A structure of a pipe connecting portion in which a receiving port of one of the pipes constituting a pipe is inserted into and connected to an insertion port of the other pipe via an elastic water blocking ring. The dimensional difference between the inner diameter of the receptacle of the one tubular body and the outer diameter of the insertion opening of the other tubular body is set to be larger than the dimensional difference set at a predetermined nominal diameter. The length of the gap in the connection state between the inner peripheral surface of the receiving port of the pipe body and the outer peripheral face of the insertion port of the other pipe body is such that the gap length allows a change in the direction perpendicular to the axis of the insertion port. A receiving port of the one tubular body formed to have an inner diameter larger than a mouth, and an outer peripheral surface attached to a receiving port opening edge of the one tubular body and a halfway portion on the insertion side of the other tubular body. A flexible positioning piece that contacts the other pipe body so that the gap near the opening edge of the receiving port keeps a fixed distance. Structure of the tube connecting portion, characterized by comprising a positioning ring to position the. 3. A pipe which is mounted in a receptacle of one of the pipes constituting a conduit, holds an insertion tip of the other pipe inserted into and connected to the receptacle, and is inserted into the receptacle. A structure of a pipe connecting portion, comprising: a shock-absorbing cylinder that is broken when a load is applied to the insertion pipe in a direction and the insertion port of the other pipe is movable in an axial direction. 4. An insertion port of the other pipe body is inserted and connected to a receiving port of one of the pipe bodies constituting the pipe path via an elastic waterproof ring, and the one of the pipe bodies is connected. The mouth of
In the structure of the pipe connecting portion formed to have a large inner diameter having a gap allowing a change in a direction perpendicular to the axis of the insertion opening of the other pipe, the pipe is attached to a receiving opening edge of the one pipe. The other tube has a flexible positioning piece abutting on the outer peripheral surface of the halfway portion on the insertion side of the other tube body, the other of the other tube so that the gap in the vicinity of the opening edge of the receiving port keeps a certain distance. A positioning ring for positioning an insertion opening of the tubular body; and a positioning ring attached to the inner side of the receiving opening of the one tubular body, holding the leading end of the inserting opening of the other tubular body, and inserting the insertion tube in the insertion direction with respect to the receiving opening. And a shock-absorbing cylinder, wherein the mouth is broken when a load is applied and the insertion opening of the other tube is movable in the axial direction. 5. A structure of a pipe connecting portion in which an inlet of one of the pipes constituting a pipe is inserted into and connected to an insertion port of the other pipe via an elastic waterproof ring. The dimensional difference between the inner diameter of the receptacle of the one tubular body and the outer diameter of the insertion opening of the other tubular body is set to be larger than the dimensional difference set at a predetermined nominal diameter. The length of the gap in the connected state between the inner peripheral surface of the receiving port of the pipe body and the outer peripheral face of the insertion port of the other pipe body is such that the gap length is allowed to vary in the direction perpendicular to the axis of the insertion port. A receiving port of the one tubular body formed to have an inner diameter larger than a mouth, and an outer peripheral surface attached to a receiving port opening edge of the one tubular body and a halfway portion on the insertion side of the other tubular body. A flexible positioning piece that contacts the other pipe body so that the gap near the opening edge of the receiving port keeps a fixed distance. A positioning ring for positioning the one of the tubes, which is attached to the back of the inside of the socket of the one tube, holds the tip of the insertion of the other tube, and receives a load in the insertion direction with respect to the socket. And a shock-absorbing cylinder which is broken when the other tube is inserted so that the opening of the other tube is movable in the axial direction. 6. The buffer cylinder is formed in a tubular shape that is mounted at the back of the inside of the receptacle of the one tubular body, and holds a front end of the insertion opening of the other tubular body at one end opening. And a locking projection on the outer peripheral surface of the other end that engages with the step on the back of the socket, and the insertion port has received a load in the insertion direction with respect to the reception port. 6. In this case, the insertion opening of the other tube is made movable in the axial direction by breaking the locking projection.
Structure of the pipe connection part of any one of the above. 7. The shock-absorbing cylinder is formed of a cylindrical body attached to the back of the one of the pipes, and has a plurality of grooves formed at least in a circumferential direction on an outer peripheral surface, and one opening At the other end, the insertion end of the other tubular body is held, and when the insertion opening receives a load in the insertion direction with respect to the receiving opening, the peripheral surface portion is damaged by the groove and the other end is damaged. The structure of the pipe connection part according to any one of claims 3 to 5, wherein the insertion opening of the pipe is movable in the axial direction. 8. The buffer cylinder is formed in a tubular shape that is mounted at the back of the inside of the receptacle of the one tubular body, and holds a front end of the insertion opening of the other tubular body at one end opening. Having a portion, on the outer peripheral surface of the other end portion, has a locking convex portion that engages with the step portion in the back of the socket, and has a groove formed at least in the circumferential direction on the outer peripheral surface, When a load is applied to the insertion port in the insertion direction with respect to the reception port, the peripheral surface portion is damaged in the groove portion and / or the locking projection is damaged, so that the insertion of the other tubular body is performed. The structure of the pipe connection part according to any one of claims 3 to 5, wherein the pipe is movable in the axial direction. 9. The positioning ring according to claim 1, wherein a rib for supporting a connection state between a receiving port of said one pipe and an insertion port of said other pipe is formed. ,
The structure of the pipe connecting portion according to any one of 2, 4, 5, 6, 7, and 8. 10. The structure of the tube connecting portion according to claim 1, wherein said one tube is constituted by a square.