JP3529470B2 - Sewerage joint structure - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint structure for sewerage equipment for connecting various mounting pipes to manholes, small basins, main pipes, auxiliary pipes, branch pipes and the like.

[0002]

2. Description of the Related Art Conventionally, a manhole joint is generally used when connecting a mounting pipe to a sewer facility such as a manhole opening. As a connection structure of this manhole joint, one shown in FIG. 4 or FIG. 5 is known. In FIG. 4, an opening 51 is provided in a side wall of a manhole block 50 made of concrete, and a connection side end portion of a manhole joint 52 is inserted into the opening 51,
The mortar 53 and the bonding agent 54 are filled in the gap between the outer wall of the connection side end and the end surface of the opening 51, and the connection work is completed.

FIG. 5 shows an example of connection when a manhole joint in which the saddle portion 60 and the main body 61 are integrally formed by injection molding is used. In this case, the saddle portion 60 contacts the side wall of the manhole to stabilize the connection of the manhole joint 61, so that the water blocking effect is further enhanced.

[0004]

However, in the conventional connection structure using the manhole joint, since the adhesion is secured only by the mortar filled in the gap between the manhole joint and the end face of the manhole opening, the seismic resistance is weak. There has been a problem that intrusion water into the manhole frequently occurs, and thus a stable water-stopping effect cannot be expected for a long period of time. Further, the filling of the mortar must be done manually at the site, and the workability is poor, and there is a problem that backfilling cannot be performed before the curing is completed.

The present invention has been made in consideration of the above problems in the joint structure of the conventional sewer system,
An object of the present invention is to provide a joint structure for sewerage facilities, which is easy to construct, has excellent earthquake resistance, and can ensure perfect water stoppage for a long period of time.

[0006]

According to the present invention, in a joint structure of a sewer system for connecting various attachment pipes to openings of manholes, main pipes, etc., (a) connecting end portions of connection pipes can be connected. And a resin joint member having a socket that can be inserted into an opening such as a manhole or main pipe at the other end, and (b) a flexible resin having heat shrinkability. A seat part with an opening capable of covering the wall surface around the opening part of the manhole, the main pipe, etc., and a tubular neck part projecting from the opening edge of the seat part and capable of fitting with a tubular insertion part. A joining member having the joining member, and joining the tubular insertion portion and the tubular neck portion by heating and shrinking the tubular neck portion, and further heating the seat portion to open the seat portion in a manhole, a main pipe, or the like. It is a joint structure of sewerage equipment pressed against the wall surface around the section.

In the present invention, it is preferable to form an annular collar portion that can come into planar contact with the seat portion on the outer periphery of the body portion of the resin joint member. An example of the soft resin in the present invention is butyl rubber containing crosslinked polyethylene as a main component.

The manhole in the present invention includes any concrete pipe body such as a concrete block, a fume pipe and the like, which are constructed by stacking ring-shaped concrete pipes.

[0009]

In the present invention, the resin joint member and the joining member are joined to each other by heat shrinkage, and the joining member and the manhole,
The opening of the main building, etc. is adhered to each other by heating the sheet part of the joining member and pressing it against the wall surface around those openings, whereby the joint structure of the sewer system for connecting the mounting pipe is formed. Composed. Further, the resin-made joint member having the ring-shaped collar portion formed on the outer periphery of the body portion can prevent the mounting pipe from swinging and further stabilize the joint structure.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the embodiments shown in the drawings. FIG. 1 shows an embodiment of a joint structure of sewerage system according to the present invention applied to a manhole. In FIG. 1, the manhole 1 is a concrete block formed by stacking ring-shaped concrete cylinders, a fume pipe, or the like.
At the lower part of the side wall surface, openings 1a and 1b for communicating with the mounting tubes 4 and 4 are provided at the same height. The resin joint members (hereinafter referred to as joint members) 2 and 2 are fixed to the manhole openings 1a and 1b via the joining member 3, and the resin joint members 2 and 2 have openings 1a of the manhole 1. , 1b at the end opposite the mounting pipes 4, 4
Are connected. In the figure, 1c is a manhole cover. Reference numerals 7 and 7 in the figure denote bands for fixing the joining member 3.

As shown in FIG. 2 (a view from the arrow B in FIG. 1), the joining member 3 is made to match the marking Mo drawn on the wall surface of the manhole 1 with the marking Mi drawn on the joining member 3. Be positioned. This marking Mi
In order to improve work efficiency, it is desirable to use a paint whose color changes from “green” to “red” or a paint whose color disappears by an appropriate heating temperature.

Next, the configuration of each part will be described in detail with reference to FIG. FIG. 3 is an enlarged sectional view of the “A” part in FIG. In the figure, the joint member 2 is made of an injection-molded product of vinyl chloride resin, and a socket portion 2a having a large diameter for connecting the mounting pipe 4 is formed at an end portion of the manhole 1 opposite to the opening portion. Has been done.

The inner wall of the socket 2a is formed with two grooves in parallel with each other, and a ring-shaped packing 2b is fitted in the groove. This socket portion 2a is
It functions so that liquid leakage does not occur even if the mounting pipe 4 connected thereto vibrates. Further, an annular flange portion 2c is formed substantially in the center of the joint member 2, and a cylindrical portion insertion portion 2d is formed from the flange portion 2c toward the manhole side. Since the mounting pipe 4 can be inserted along the inner wall of the body of the joint member 2 and the insertion amount of the mounting pipe 4 can be adjusted, the conventional mounting pipe 4 is connected from the downstream side. The construction period can be shortened without being restricted by the construction method.

The joining member 3 is made of a cross-linked polyethylene having a heat-shrinking function as a base material and an adhesive layer provided on the joining surface, and is interposed between the joint member 2 and the manhole opening 1b. Specifically, the joining member 3 includes a seat portion 3a and a tubular neck portion 3b formed integrally with the seat portion 3a, and the seat portion 3a has a square or rectangular shape (see FIG. 2). A cylindrical insertion part 2d is formed in the center.
An opening having the same diameter as the outer diameter of the. The sheet portion 3a covers the wall surface 1d around the manhole opening portion and is sandwiched by the collar portion 2c. On the other hand, the tubular neck portion 3b is the seat portion 3a.
Is formed in a skirt shape from the opening edge of the joint member 2
It is adapted to be inserted into the cylindrical insertion portion 2d.

It is preferable that the joining member 3 and the joint member 2 are bonded in advance in a factory before being brought into the field.
In this case, the joint portion B of the joint portion 3 facing the collar portion 2c, the cylindrical insertion portion 2d and the cylindrical neck portion 3b fitted and inserted therein.
The joint surfaces C of and are joined by heating. At this time, since the joining member 3 contracts due to heating, the joining member 3 is joined in a state in which it is in close contact with the outer wall of the cylindrical insertion portion 2d. Moreover, since the adhesive layer made of butyl rubber is adhered to the joint side surface of the joint member 3, the joint member 2 and the joint member 3 thus joined can be in a very good close contact state. Table 1 shows the physical properties of the base material and the adhesive layer of the joining member 3.

[0016]

[Table 1]

The peripheral edge of the sheet portion 3a is covered with the waterproof adhesive tape 5. Also, the manhole opening 1
A gap between the end surface of a and the joining member 3 is filled with a one-component curable urethane resin or rubber-based filler 6.

The construction procedure of this embodiment having such a structure will be described below. First, the joint member 2 and the joint member 3 are pre-joined at the factory and brought into the field. At the time of joining, the joint surface C of the collar portion 2c and the joint member 3 facing it
_1. The joining surfaces C ₂ of the tubular insertion portion 2d and the tubular neck portion 3b fitted therein are heated and fused, and the heat shrinking function of the joining member 3 is used to form a tubular neck portion on the outer wall of the tubular insertion portion 2d. 1
e is fixed firmly and in close contact.

On the other hand, at the site, the wall surface around the manhole opening 1a (the range where the seat 3a is joined) is cleaned and preheated. Next, the tubular neck portion 3b of the joining member 3 joined and integrated with the joint member 2 is inserted into the manhole opening 1a, and the seat portion 3a is brought into contact with the wall surface of the manhole 1. Next, the sheet portion 3a is heated from the outside of the sheet portion 3a using a burner, and the sheet portion 3a and the wall surface are adhered while being pressed. Next, the filler 6 is filled in the gap between the cylindrical neck portion 3b and the end surface 1e of the manhole opening 1a. Thereby, the joint member 2 can be fixed to the manhole opening 1a. Next, when the mounting pipe 4 is press-fitted into the socket portion 2a of the fixed joint member 2, the connecting work between the mounting pipe 4 and the manhole 1 is completed via the joint member 2 and the joining member 3.

The manhole joint structure of the present invention is
The present invention is not limited to the connection of the mounting pipe made of a straight pipe as in the above embodiment, but can be applied to the connection of various mounting pipes such as a branch pipe having a slanting angle and a curved pipe.

Further, in the present invention, the flexible resin having heat shrinkability is composed of a resin containing cross-linked polyethylene as a main component in the above-mentioned embodiment. Examples of the resin that can hold the resin include those obtained by shrink-fitting a resin tube having a shape memory property.

The mounting pipe includes a resin pipe made of hard vinyl chloride resin or the like and a fiber reinforced resin pipe made of FRP pipe or the like. Further, the socket in the present invention is configured as a socket type in the above embodiment, but is not limited to this,
It also includes a mouth opening type.

[0023]

As is apparent from the above description, according to the joint structure of the sewerage system of the present invention, the construction is simple, the seismic resistance is excellent, and the perfect water stop can be secured for a long time. It has the advantage of being able to. Further, since the joining member has flexibility, it is not necessary to perform the piping work from the downstream side to the upstream side, and there is an advantage that the joint structure can be adjusted.

[Brief description of drawings]

FIG. 1 is a side view having a partial cutout showing an example of a joint structure of the present invention.

FIG. 2 is a view on arrow B showing a seat portion 3a of FIG.

FIG. 3 is an enlarged cross-sectional view of a portion A of FIG.

FIG. 4 is a side view showing a connection structure for a conventional manhole joint.

FIG. 5 is a side view showing another example of a conventional connection structure for a manhole joint.

[Explanation of symbols]

1 manhole 1a, 1b Manhole opening 2 joint members 2a Socket part 2b packing 2c Tsuba part 2d tubular insert 3 joining members 3a seat part 3b tubular neck 4 Mounting tube 5 waterproof adhesive tape 6 Filling material 7 bands

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Claims (3)

(57) [Claims] 1. A joint structure for sewerage equipment, wherein various mounting pipes are connected to openings such as manholes, main pipes, etc., (a) A socket to which a connecting side end of the mounting pipe can be connected is provided at one end. And the manhole at the other end,
A resin joint member having a tubular insertion portion for insertion into an opening of a main pipe, and (b) a flexible resin having heat-shrinkability, A sheet member with an opening capable of covering, and a joining member having a tubular neck portion projecting from an opening edge of the sheet portion and capable of fitting with the tubular insertion portion; By heat-shrinking, the tubular insertion portion and the tubular neck portion are joined, and the seat portion is further heated to attach the seat portion to the manhole,
A joint structure for sewerage facilities, characterized by being pressed against the wall surface around the opening of a main pipe or the like. 2. The joint structure according to claim 1, wherein an outer peripheral surface of the body of the resin joint member is formed with an annular flange portion that can come into planar contact with the seat portion. 3. The joint structure according to claim 1, wherein the flexible resin is a resin whose main component is crosslinked polyethylene.