JP2002364012A - Connecting construction for vertical pipe member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connecting construction for a vertical pipe member which is capable of omitting troublesome fastening work with bolts and nuts and of automatically and adequately performing the centering of the vertical pipe members each other when connecting together the vertical pipe members. SOLUTION: When connecting a pair of upper and lower vertical pipe members 1A and 1B together in a connecting construction, a spigot portion 12 which is gradually made larger in diameter toward upper direction is formed at the edge portion of the upper end opening 11 of the vertical pipe member 1B at the lower side. An insertion hole 15 which is gradually made smaller in diameter when the outer peripheral surface comes to the lower portion is formed at the edge portion of the lower end opening 14 of the vertical pipe member 1A at the upper side. A water stop member 6 is attached to the upper side than the insertion hole 15 on the outer peripheral surface of the lower end opening 14. Even though a deviation from the center slightly occurs when connecting the vertical pipe members together, the respective vertical pipe members 1A and 1B can be inserted in an aligned state by the contact between the spigot portion 12 and the inserting hole 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection structure between vertical pipe members used for, for example, sewerage. In particular, the present invention relates to an improvement in a structure for improving workability when connecting the vertical pipe members to each other and ensuring sufficient water stoppage.

[0002]

2. Description of the Related Art Conventionally, as a method of attenuating the flow rate of sewage in flowing down sewage into manholes, for example,
As described in JP-A-8-41915,
A vertical sewer pipe (drop shaft) is arranged in a manhole. As this type of vertical sewage pipe, a pipe with a spiral guide path in which a spiral guide path for guiding sewage to flow down while drawing a spiral shape is formed inside a vertically arranged straight tubular pipe main body. Is used.

In a vertical pipe of this type, when the height difference from the sewage inflow section to the sewage main pipe at the bottom of the manhole is large, a plurality of vertical pipe members are added and connected.
As a general method of connecting the vertical pipe members, as shown in FIG. 5, flanges b, b are attached to the edges of the vertical pipe members a1, a2.
And a flange system in which the flanges b and b are fastened and connected with bolts d and nuts e with a seal rubber c interposed therebetween (see FIG. 5A), or a vertical pipe member a1 butted against each other. , A2 is covered with a cylindrical seal rubber f and a butt system is connected by fastening with a fastening band g around the seal rubber f (see FIG. 5B).
Alternatively, a seal rubber i is attached to the outer peripheral surface of the lower end of the upper vertical pipe member a1 or the inner peripheral surface of the enlarged diameter portion h formed at the upper end of the lower vertical pipe member a2. By inserting the upper vertical pipe member a1 into the enlarged diameter portion h of a2,
A slip-on system (see FIG. 5C) in which a seal rubber i is interposed between the vertical pipe members a1 and a2 for connection is known.

[0004]

However, the above-described connection structures have the following problems.

[0005] First, in the flange system shown in FIG. 5A, an operation of interposing a seal rubber c between the flanges b and b and an operation of fastening and connecting the flanges b and b to each other by bolts d and nuts e are required. In addition, the work is not only complicated but also requires a long working time.

Also, in the butting method shown in FIG. 5 (b), the covering operation of the sealing rubber f and the attaching operation of the fastening band g are necessary, and the operation is complicated and requires a long operation time.

In the slip-on system shown in FIG. 5C, the above-mentioned complicated work can be eliminated. However, in this method, the upper vertical pipe member a1 is suspended while the upper vertical pipe member a1 is lowered while the center is aligned with the lower vertical pipe member a2. Occurs, the lower edge of the upper vertical pipe member a1 comes into contact with the upper edge of the lower vertical pipe member a2, so that the pipe cannot be inserted. Further, in particular, the large-diameter vertical pipe member a1,
When this method is adopted when connecting a2 to each other,
Since the weight of the vertical pipe member itself is large, the upper vertical pipe member a1
When the lower edge of the vertical pipe member a2 contacts the upper edge of the lower vertical pipe member a2, the upper edge of the lower vertical pipe member a2 may be locally deformed. Furthermore, in the case of the slip-on system, even if the lower end edge of the upper vertical pipe member a1 can be inserted into the enlarged diameter portion h of the lower vertical pipe member a2, accurate centering is not performed. In this case, only a part of the seal rubber i is strongly pressed against the upper end surface of the enlarged diameter portion h, and there is a possibility that the seal rubber i may peel off from the vertical pipe member a1 and hinder water stopping. is there.

SUMMARY OF THE INVENTION The present invention has been made in view of the foregoing, and an object of the present invention is to eliminate the need for complicated work such as fastening work using bolts and nuts when connecting vertical pipe members, and It is an object of the present invention to provide a connection structure for vertical pipe members that enables automatic vertical alignment of the vertical pipe members.

[0009]

Means for Solving the Problems-Summary of the Invention-In order to achieve the above-mentioned object, the present invention provides a method of making each of the vertical pipe members connected to each other have an appropriate relative position with respect to the other vertical pipe member. A guide means is provided to enable accurate alignment, and after the guidance by the guide means, the water blocking member is brought into contact with the vertical pipe member on the other side.

-Solution Means- Specifically, the present invention provides a method of connecting vertical pipe members by connecting the vertical pipe members to each other by inserting a lower opening of another vertical pipe member into an upper opening of the vertical pipe member. Assume the structure. As a connection structure for this vertical pipe member, a receiving portion having a diameter gradually increased upward is formed at an edge of an upper end opening of the lower vertical pipe member. On the other hand, the outer diameter of the lower end opening of the upper vertical pipe member is set so as to substantially match the inner diameter of the lower vertical pipe member. Further, at the edge of the lower end opening, an insertion opening portion whose diameter is gradually reduced as the outer peripheral surface goes downward is formed, and a water blocking member is provided above the insertion opening portion on the outer peripheral surface of the lower end opening portion. Is mounted over the entire circumference. Then, the lower end opening of the upper vertical pipe member is inserted into the upper end opening of the lower vertical pipe member, and between the inner peripheral surface of the lower vertical pipe member and the outer peripheral surface of the upper vertical pipe member. The water blocking member is interposed in a state of being compressed and deformed to connect the vertical pipe members to each other.

According to this specific matter, when inserting the lower end opening of the upper vertical pipe member into the upper end opening of the lower vertical pipe member installed in the manhole, for example, the upper vertical pipe member is suspended. The upper vertical pipe member is lowered while being aligned with the lower vertical pipe member by supporting or the like. Then, when the lower end opening of the upper vertical pipe member is inserted into the upper end opening of the lower vertical pipe member, even if there is some misalignment, the receiving portion of the lower vertical pipe member and the upper When the vertical tube member comes into contact with the insertion opening of the vertical tube member, the relative position of each vertical tube member with respect to the other vertical tube member is adjusted, and the center axes of the respective vertical tube members are aligned. After the centering is performed, when the upper vertical pipe member is further lowered, the water stopping member attached to the outer peripheral surface of the upper vertical pipe member comes into contact with the inner surface of the lower vertical pipe member. And compressed and deformed between the vertical pipe members. Then, when the insertion operation of the upper vertical pipe member is completed, the respective vertical pipe members are connected to each other in a state where the water blocking property is secured by the water blocking member. In this way, by simply performing the work of inserting the lower end opening of the upper vertical pipe member into the upper end opening of the lower vertical pipe member, connection is performed in a state where the respective vertical pipe members are aligned. In addition, since the water-stopping member is deformed in the aligned state, there is no local breakage and a good water-stopping structure can be obtained.

Further, by setting the angle of inclination of the receiving portion of the lower vertical pipe member and the angle of inclination of the insertion port of the upper vertical pipe member to be substantially the same, the water stopping member can be moved vertically downward. The centering of the vertical pipe members before contacting the inner surface of the pipe members can be reliably performed, and the water stoppage after the connection of the vertical pipe members can be reliably ensured.

[0013]

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

FIG. 1 schematically shows the entire structure of a vertical pipe for sewerage (hereinafter simply referred to as vertical pipe), and FIG. 2 shows a state before connecting vertical pipe members 1A and 1B constituting this vertical pipe. FIG. 3 shows a state in the middle of the connection work between the vertical pipe members 1A and 1B, and FIG. 4 shows a state after the connection between the vertical pipe members 1 and 1.

The vertical pipe member is a bent vertical pipe member 3 connected to a sewage inflow section 21 provided on a side wall of the manhole 2.
And a plurality of vertical pipe members 1, 1, 1 connected to each other. These bent vertical pipe member 3 and vertical pipe member 1
Examples of the materials 1 and 1 include thermoplastic resins such as vinyl chloride resins, olefin resins (polyethylene, polypropylene, etc.) and methacrylic resins, thermosetting resins such as unsaturated polyester resins, vinyl ester resins and epoxy resins, or Fiber reinforced resins obtained by reinforcing these resins with fibers such as inorganic fibers, glass fibers, organic fibers, carbon fibers, aramid fibers, and vinylon fibers are exemplified.

The vertical pipe member 3 and the vertical pipe members 1, 1, 1 used in the present embodiment have an inner diameter of 2600 mm. The present invention can be applied to other dimensions. Then, the uppermost vertical pipe member 1 of the plurality of vertical pipe members 1, 1, 1 is bent and connected to the lower end of the vertical pipe member 3,
The lowermost vertical pipe member 1 faces the sewage main pipe 4 at the bottom of the manhole via the outflow portion 10. Thereby, the inflow section 21
The sewage flowing from the sewage flows down the vertical pipe members 3 and the vertical pipe members 1, 1, 1 in the vertical direction, and is discharged from the outflow portion 10 to the main sewage pipe 4.

A hollow shaft 51 is provided inside the vertical pipe member 1.
A screw shaft 5 provided with a spiral wing 52 is inserted therein. The screw shaft 5 prevents the bottom surface 20 of the manhole 2, which is the bottom of the vertical pipe, from cracking due to the impact of the sewage falling from the inflow portion 21, and also prevents noise and sewage odor when the sewage falls. It has been made like that.

Next, the shape of the opening edge of each of the vertical pipe members 1 and 1 constituting the vertical pipe will be described. As shown in FIG.
A receptacle 12 is formed at the edge of the upper end opening 11 of the lower vertical pipe member 1B of the pair of upper and lower vertical pipe members 1A and 1B connected to each other. This receptacle 12
Is formed in such a shape that its diameter gradually increases as it goes upward. The angle of inclination of the receptacle 12 is set to about 60 ° with respect to the horizontal direction. This inclination angle is not limited to this value.

The inner peripheral surface of the lower vertical pipe member 1B at a lower position having a predetermined dimension from the upper end opening 11 has a ring-shaped contact portion 1 slightly protruding toward the inner peripheral side.
3 are integrally formed. When the lower end opening 14 of the upper vertical pipe member 1A is inserted into the upper end opening 11 of the lower vertical pipe member 1B, the lower end of the upper vertical pipe member 1A comes into contact with the contact portion 13. In this position, the position of the upper vertical pipe member 1A relative to the lower vertical pipe member 1B is determined.

On the other hand, the lower end opening 14 of the upper vertical pipe member 1A of the pair of upper and lower vertical pipe members 1A and 1B has an outer diameter dimension substantially matching the inner diameter dimension of the lower vertical pipe member 1B. ing. Also, the lower end opening 1 of the upper vertical pipe member 1A is formed.
An insertion port 15 is formed on the outer peripheral surface of the edge of the fourth portion.
The insertion opening 15 is formed in a shape whose diameter is gradually reduced as the outer peripheral surface goes downward. This insertion port 15
Is set to about 60 ° with respect to the horizontal direction. That is, the inclination angle of the insertion port 15 is set to match the inclination angle of the receptacle 12.
The angle of inclination of the insertion opening 15 is not limited to this value.

Further, a ring-shaped water blocking member 6 is attached to the entire outer periphery of the outer peripheral surface of the upper vertical pipe member 1A above the insertion opening portion 15. The water stopping member 6 is made of, for example, rubber, and each of the vertical pipe members 1A, 1B.
When they are connected to each other, they are sandwiched between the two parts 1A and 1B so as to exhibit the water stopping performance of this connection part (see FIG. 4).

Next, the operation of connecting the vertical pipe members 1A and 1B will be described. Here, of the connecting portions of the bent vertical pipe member 3 and the vertical pipe members 1, 1, 1 constituting the vertical pipe, the lowermost vertical pipe member 1B and the vertical pipe member 1A connected to the upper portion thereof.
A description will be given of an example of the operation when connecting the.

First, the lower vertical pipe member 1B is fixed to the bottom portion 20 of the manhole 2. The vertical pipe members 1A and 1B are connected to each other by inserting the lower end opening 14 of the upper vertical pipe member 1A into the upper end opening 11 of the lower vertical pipe member 1B. Specifically, the wire W is locked to a bolt B attached to the side surface of the upper vertical pipe member 1A, and the wire W
Lifts the upper vertical tube member 1A. In this state, the central axis of the upper vertical pipe member 1A and the lower vertical pipe member 1B
The vertical pipe member 1 on the upper side so that the central axis of
Move A. Thereafter, the upper vertical pipe member 1A is lowered. Then, as shown in FIG. 3, the upper vertical pipe member 1A
Lower end opening 14 of upper vertical opening 1 of lower vertical pipe member 1B
When the two are slightly misaligned, the receptacle 12 of the lower vertical pipe member 1B and the insertion port 15 of the upper vertical pipe member 1A come into contact with each other even when the two are slightly misaligned. The relative positions of the vertical pipe members 1A and 1B with respect to the other vertical pipe members 1B and 1A are adjusted, and the center axes of the vertical pipe members 1A and 1B are aligned. After this centering is performed, the upper vertical pipe member 1
A is lowered, so that the water stopping member 6 attached to the outer peripheral surface of the upper vertical pipe member 1A becomes lower vertical pipe member 1A.
B contacts the inner surface of B and is compressed and deformed by being sandwiched between the vertical pipe members 1A and 1B. Then, as shown in FIG. 4, at the time when the lower end of the upper vertical pipe member 1 </ b> A is lowered until the lower end abuts against the abutting portion 13, the water stopping member 6 is uniformly elastically deformed over its entirety. Each vertical pipe member 1
The vertical pipe members 1A and 1B are connected to each other in a state where the water stoppage between A and 1B is well ensured.

Such a connecting operation is performed by connecting the upper vertical pipe members 1 and 2 to each other.
By performing the same procedure for the vertical pipe member 1 and the bent vertical pipe member 3, a vertical pipe in which the water stopping property at each connection portion is ensured is completed.

-Effects of Embodiment- As described above, in this embodiment, the insertion opening 15 is formed in the lower end opening 14 of the upper vertical pipe member 1A, and the lower vertical pipe member 1B is formed.
By forming the receiving opening 12 in the upper end opening 11 of the upper side, the work of simply inserting the lower end opening 14 of the upper vertical tube member 1A into the upper end opening 11 of the lower vertical tube member 1B can be performed. Only by performing this, the vertical pipe members 1A and 1B are connected in a state where they are centered, and the water stopping member 6 can be elastically deformed in a state where they are centered. For this reason, complicated work such as the conventional fastening work using bolts and nuts is not required, and local breakage of the water stopping member 6 can be avoided, so that a good water stopping structure can be obtained.

Further, the center deviation of the vertical pipe members 1A and 1B is not limited to the case where the central axes of the vertical pipe members 1A and 1B are parallel to each other and are shifted in the horizontal direction. And the center axes are in a twisted position. Even in these cases, according to the present embodiment, the centering can be automatically performed.

-Other Embodiments- In the above-described embodiment, the case where the present invention is applied to a connection structure between vertical pipe members of a drop shaft for guiding sewage to flow down while drawing a spiral shape has been described.
The present invention is not limited to this, and can be applied to various vertical pipes as long as the vertical pipe requires water stoppage.

In the above embodiment, the case where the receiving portion 12 is formed integrally with the lower vertical pipe member 1B has been described. The present invention is not limited to this, and a member formed in the same shape as the receptacle 12 may be integrally attached to the upper end edge of the lower vertical pipe member 1B. Similarly, a member formed in the same shape as that of the insertion opening 15 may be integrally attached to the lower edge of the upper vertical tube member 1A.

[0029]

As described above, according to the present invention, the relative positions of the vertical pipe members connected to each other with respect to the counterpart vertical pipe members are appropriately set so that accurate centering can be performed. Means are provided. That is, at the edge of the upper end opening of the lower vertical pipe member, a receiving portion that is gradually increased in diameter as it goes upward is formed, and at the edge of the lower end opening of the upper vertical pipe member, the outer peripheral surface is formed. Forms an insertion opening part whose diameter is gradually reduced as it goes downward. Thereby, when the lower end opening of the upper vertical pipe member is inserted into the upper end opening of the lower vertical pipe member, even if there is some misalignment, the receiving portion of the lower vertical pipe member and the upper When the vertical tube member comes into contact with the insertion opening of the vertical tube member, the relative position of each vertical tube member with respect to the other vertical tube member is adjusted, and the center axes of the respective vertical tube members are aligned. Then, after the centering is performed, the water stopping member attached to the outer peripheral surface of the upper vertical pipe member is sandwiched between the vertical pipe members and is compressed and deformed. In this way, by simply performing the work of inserting the lower end opening of the upper vertical pipe member into the upper end opening of the lower vertical pipe member, connection is performed in a state where the respective vertical pipe members are aligned. In addition, the water stopping member is deformed in a state where it is aligned.
As a result, complicated work such as the conventional fastening work with bolts and nuts can be eliminated, the connection work can be simplified and the time required for the work can be shortened, and the water stopping member is vertically Peeling off from the pipe member can be avoided, and a good water stopping structure can be obtained.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view schematically showing an overall configuration of a vertical sewer pipe according to an embodiment.

FIG. 2 is a cross-sectional view showing a state before connection between vertical pipe members.

FIG. 3 is a cross-sectional view showing a state in the middle of a connecting operation of the vertical pipe member.

FIG. 4 is a sectional view showing a connection state between vertical pipe members.

FIG. 5 is a sectional view showing a conventional vertical pipe connection structure.

[Explanation of symbols]

 1, 1A, 1B Vertical pipe member 11 Upper end opening 12 Reception opening 14 Lower end opening 15 Insertion opening 6 Water stopping member

Claims (2)

[Claims] 1. A vertical pipe member connection structure for connecting vertical pipe members by inserting a lower end opening of another vertical pipe member into an upper end opening of the vertical pipe member, wherein the lower vertical pipe At the edge of the upper end opening of the member, a receiving portion is formed, the diameter of which is gradually increased as it goes upward, while the lower end opening of the upper vertical pipe member has an inner diameter of the lower vertical pipe member. In addition to having an outer diameter dimension that substantially matches, an insertion opening part whose diameter is gradually reduced as the outer peripheral surface goes downward is formed at the edge of the lower end opening part, and the lower end opening part has A water blocking member is attached over the entire circumference of the outer peripheral surface above the insertion opening, and a lower end opening of the upper vertical pipe member is inserted into an upper end opening of the lower vertical pipe member. Between the inner peripheral surface of the lower vertical pipe member and the outer peripheral surface of the upper vertical pipe member. A connection structure for vertical pipe members, wherein the vertical pipe members are connected to each other while the water member is interposed in a compressed and deformed state. 2. The connection structure for a vertical pipe member according to claim 1, wherein an inclination angle of a receiving portion of the lower vertical pipe member and an inclination angle of an insertion opening of the upper vertical pipe member are substantially the same. A connection structure for a vertical pipe member, wherein the connection structure is set.