JP2001295977A - Branch pipe joint device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve workability for joining a branch pipe by fixing a branch pipe joint device to an underground pipe material such as a sewer in a short time with high sealing performance. SOLUTION: The branch pipe joint device for joining the branch pipe P2 to the underground pipe material such as the sewer P1 in a T-form comprises a joint body B having a joint opening H2 corresponding to a sewer opening H1 of the sewer P1, opened to the center of a sectionally circular sealing plate 1 corresponding to the outer diameter of the sewer P1, and a branch pipe socket 2 integrally formed at the peripheral edge of the joint opening H2, and a pair of fixtures R having bolts 12 integrally fixed in rising attitude to fittings 11 to be fitted to two portions of the opening peripheral edge of the sewer P1 along the longitudinal direction. A pair of slit bolt insertion holes 7 are provided in the longitudinal direction of the sewer P1, through which the bolts 12 of the fixtures R are inserted into the seal plate 1 of the joint body B with the branch pipe socket 2 held therebetween.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a branch pipe coupling device for connecting a branch pipe in a T-shape to an underground pipe such as a sewage main pipe.

[0002]

2. Description of the Related Art As one of the branch pipe joint devices described above, a joint opening corresponding to the opening of the sewage main pipe is opened at the center of a seal plate having an arc-shaped cross section corresponding to the outer diameter of the sewage main pipe. In addition, a joint body having a branch pipe receiving port integrally formed at a peripheral portion of the joint opening and fixed to the opening portion of the sewage main pipe using an adhesive and a wire is often used. . That is, an adhesive is applied to the back surface of the seal plate portion having an arc-shaped cross section so as to cover the opening of the sewage main pipe, and the seal plate portion is brought into close contact with the outer peripheral surface of the sewage main pipe. Both ends (both ends sandwiching the branch pipe inlet) of the seal plate were tied together with the sewer main pipe and fixed.

For this reason, the conventional branch pipe joint device described above requires a great deal of time to apply an adhesive to the back surface of the seal plate and to tie the joint body to the sewage main pipe.
Until the adhesive was cured, the excavated soil could not be backfilled, and the workability for connecting the branch pipes was extremely poor. Also, since an adhesive is used to seal the sewage main pipe and the joint body, uneven application of the adhesive and displacement of the joint body after bonding are likely to occur. Had poor sealing properties, causing water leakage.

[0004]

An object of the present invention is to provide a branch pipe joint device which can be fixed to a submerged pipe such as a sewage main pipe with a high sealing property and in a short time, so that a branch pipe connection can be established. The task is to improve the workability of the work.

[0005]

The invention according to claim 1 for solving the above-mentioned problems is a branch pipe joint device for connecting a branch pipe in a T-shape to an underground pipe material such as a sewage main pipe. A joint opening corresponding to the opening of the underground pipe is opened at the center of the seal plate having an arc-shaped cross section corresponding to the outer diameter of the underground pipe, and a branch is formed at a peripheral portion of the joint opening. A joint body in which a pipe receiving port is integrally formed, and a pair of bolt bodies integrally fixed in an upright posture to a fitting body fitted to two portions along a longitudinal direction of an opening periphery of the underground pipe material. And a pair of elongated hole-shaped bolt body insertion holes through which the bolt body of the fixture is inserted through the seal plate portion of the joint body with the branch pipe port interposed therebetween, wherein the underground pipe material is provided. Is characterized in that it is provided in the longitudinal direction.

According to the first aspect of the present invention, the joint body is applied to the outer peripheral surface of the pipe buried underground, and only the bolt body is projected to the outside through each of the elongated bolt body insertion holes. When the fixture is moved in the longitudinal direction of the underground pipe, the fitting body is fitted to two portions along the longitudinal direction of the opening edge of the underground pipe. In this state, when a nut is screwed into each bolt body protruding from each of the long holes on the outer peripheral side of the seal plate portion of the joint main body, the joint main body becomes an opening peripheral portion of the underground pipe material. Fixed to As described above, according to the first aspect of the present invention, the joint body can be fixed to the opening peripheral portion of the underground pipe material through the pair of fixing tools. Therefore, the workability for connecting the branch pipe is greatly improved.

According to a second aspect of the present invention, the joint body and the pair of fixing members are separated from each other, and the joint body is fixed to the peripheral edge of the opening of the pipe buried underground via the pair of fixing members. It is. That is, a pair of fixtures are slid in the longitudinal direction of the underground pipe, and the fitting body is fitted in advance at two places around the opening edge of the underground pipe, and thereafter, The fitting body is brought into close contact with the outer peripheral surface of the buried pipe, the bolts of the fixture are inserted into the bolt insertion holes provided in the seal plate, and finally, the nuts are respectively inserted into the bolts of the fixtures. The joint body is screwed to fix the joint body to the underground pipe material. According to a third aspect of the present invention, in the second aspect of the present invention, the pair of bolt body insertion holes provided in the seal plate portion of the joint main body are formed in a long hole shape. The joint body can be fixed to the underground pipe material regardless of whether it is assembled integrally or separately.

According to a fourth aspect of the present invention, in the first aspect of the present invention, a curved plate-shaped core is buried inside a seal plate portion constituting the joint body. The deformation resistance is increased, and the sealing performance between the underground pipe and the joint body is improved. According to a fifth aspect of the present invention, in any one of the first to third aspects of the present invention, a separate deformation preventing plate for covering the outside of the seal plate portion forming the joint main body and preventing its deformation is provided. Therefore, for the same reason as the invention of claim 4, the sealing property between the underground pipe and the joint body is enhanced.

According to a sixth aspect of the present invention, in any one of the first to fifth aspects, an annular seal groove is formed around a joint opening of a seal plate portion constituting the joint body, and the seal groove is provided with a seal. In the state where the joint body is fixed to the underground pipe through a pair of fixtures because the material is inserted, the sealing material is compressed and deformed. Sealability is improved. In particular,
The invention according to claim 6 further enhances the sealing performance when used together with a configuration in which a core metal is buried inside the seal plate portion of the joint main body or a separate deformation preventing plate is applied to the outside of the seal plate portion. There are advantages.

According to a seventh aspect of the present invention, in any one of the first to sixth aspects of the present invention, a plurality of underground pipes having different pipe thicknesses can be fitted by the fitting thickness of the fitting body constituting the fixture. The same branch pipe joint device can be fixed to a plurality of underground pipe materials having substantially the same outer diameter but different pipe thicknesses.

According to an eighth aspect of the present invention, in any one of the first to seventh aspects, a rubber is provided on the back side between the seal plate portion of the joint main body and the nut screwed to the bolt body of the fixture. A seat plate to which a material is fixed is interposed, and when the bolt body and the nut are screwed together, the rubber material of the seat plate is compressed and deformed to provide a length provided on the seal plate portion. Since both the periphery of the hole and the outer periphery of the bolt body are sealed, the sealing performance of each part is enhanced.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in more detail with reference to examples. FIG. 1 is a partially cutaway perspective view of a branch pipe joint device according to a first embodiment of the present invention, and FIG. 2 is a perspective view of a joint body B constituting the branch pipe joint device as viewed from the bottom side. FIG. 3 is a longitudinal sectional view of the branch pipe joint device, FIG. 4 is a bottom view of the joint body B mainly showing the arrangement position of the sealing material, and FIG. 5 is a fixture R and a seat plate D. FIG. 4 is an exploded perspective view of a nut and a nut. 1 to 5, a branch pipe joint device is provided with a branch pipe P with respect to a sewage main pipe P ₁ (see FIG. 6).
₂ (see FIG. 10) to a device for connecting a T-shape, said sewer main pipe P ₁ round main bored in the opening H ₁
Composed of the joint body B to be brought into close contact with the outer peripheral surface of the peripheral portion, a pair of fasteners R for fixing the該継hand body B on the periphery of the main pipe opening H ₁ of the sewer main pipe P ₁ .

The joint body B is entirely made of rubber.
The sewage main pipe P ₁Corresponding to the outer diameter of
Seal plate part 1 having an arc-shaped cross section, and central part of seal plate part 1
Joint opening H opened in_TwoStanding on the periphery of
And a branch pipe receiving port 2 formed integrally. This joint opening H
_TwoThe size of the main opening H₁It corresponds to. C
The circular plate 1 has an arc-shaped cross section to prevent its deformation.
Metal core 3 is buried almost all over
You. On the bottom side of the seal plate 1 and at the joint opening H
_TwoIn the longitudinal direction (circular seal plate
1 perpendicular to both the circumferential direction of 1 and the axial direction of the branch pipe port 2
Direction), a rectangular shape in bottom view
Each of the fitting body accommodating grooves 4 is provided. For this reason,
The core metal 3 is positioned more apart than the center of the seal plate 1 in the thickness direction.
It is buried in the part near the surface side. Also, the sealing plate 1
The joint opening H_TwoAnd the opening H_TwoContinuous
Formed with the pair of fitting body receiving grooves 4 provided by
Surrounding the outer periphery of the space, the bottom shape of the space and
An annular seal groove 5 having a similar large size is formed, and the seal groove 5 is formed.
A sealing material 6 is inserted into the groove 5.

The pair of fittings in the seal plate portion 1
In the portion directly above the body receiving groove 4, along the longitudinal direction
A pair of long hole-shaped bolt body insertion holes 7 are provided penetrating vertically.
Have been. The length of this bolt body insertion hole 7 is
Corresponding to the slide length of the tool R along the longitudinal direction.
You. Further, the branch pipe receiving port 2 of the joint body B has a bellows shape on the base end side.
To the flexible portion 2a and the branch pipe insertion portion 2b on the tip side in the axial direction.
And the lower part is formed by the presence of the flexible part 2a.
Water main P₁And the branch pipe P connected thereto_TwoAnd at right angles
Even if it is slightly shifted,
₁Branch pipe P _TwoWith a structure that can be connected without trouble
Has become. In addition, the joint on the inner end side of the fitting body accommodation groove 4
Opening H_TwoIs housed in the housing groove 4
Tongue piece 8 for covering the inner end side of fitting 11 of fixture R
Are provided vertically.

Further, fixture R includes a fitting body 11 which has the shape of a cross-section U which is fitted at two locations along the longitudinal direction in the peripheral portion of the main pipe opening H ₁ of the sewage mains P _1, the Fitting body 11
And a bolt body 12 fixed to the outer end of the upper plate portion 11a in a vertical posture by means such as welding. The upper plate portion 11a of the fitting body 11 is formed longer than the lower plate portion 11b. Further, the joint body B relative to sewer main pipe P ₁
Is fixed between the nut body N and the outer peripheral surface of the seal plate portion 1 of the joint main body B to fix the bolt body insertion hole 7.
As shown in FIG. 5, the seat plate D for closing the whole of the hard rubber plate 21 made of EPDM is arranged from the lower layer to the upper layer.
And a butyl rubber soft rubber plate 22 and a metal plate 23
Are laminated and integrated, and a circular bolt body insertion hole 24 is provided in a portion deviated to one end in the longitudinal direction, and the rigid rubber plate portion 21 and the soft rubber plate portion 22 are fixed when fixed. By the compressive deformation, the sealing performance of the bolt body insertion hole 7 and each part of the bolt body 12 inserted into the insertion hole 7 is enhanced. Further, the bolt body insertion hole 24 is composed of a small-diameter portion 24a formed in the hard and soft rubber plate portions 21 and 22, and a large-diameter portion 24b formed in the metal plate portion 23, When the joint body B is fixed,
The outer peripheral portion of the bolt body 12 is bitten into the inner peripheral surface of the small-diameter portion 24a to ensure the sealing performance of the portion.

[0016] Subsequently, using a branch pipe coupling device comprising a fitting body B and a pair of fasteners R described above, a case of connecting a branch pipe P ₂ in a T-shape with respect to sewer main pipe P ₁ explain. The branch pipe connecting portion of the sewage mains P _1, as shown in FIG. 6, using the drilling tool, having substantially the same diameter as the joint opening H ₂ provided in the sealing plate 1 of the joint body B open the main opening H _1. Next, as shown in FIG. 6, the fitting body 11 of the fixing tool R is housed in the fitting body housing groove 4 of the joint body B, and the bolt body 12 is inserted into the bolt body insertion hole 7 of the seal plate portion 1. by inserting in, by protruding on the outside, in the assembled state the pair of fasteners R relative to the joint main body B,該継hand body main opening the sealing plate 1 of the sewer main pipe P ₁ of B against will around the H _1. In this state, as shown in FIG. 9, each of the pair of fixing tools R is located closest to the branch pipe receiving port 2, and the fitting body 11 is attached to the sewer main pipe P.
Not fitted to the periphery of the main pipe opening H _{1 1.} Then, in this state, the pair of fixtures R are respectively connected to the sewer main pipe P.
_When sliding in the longitudinal direction Q, as shown in FIGS. 7 and 10, the pair of fixtures R are separated from each other, and are respectively attached to the peripheral edge of the main pipe opening H ₁ of the sewage main pipe P _1. is fitted, the fitting body B is mounted in a temporarily fixed state to sewer main pipe P _1.

Next, a pair of bolts 12 projecting from the outer peripheral surface of the seal plate 1 of the joint body B are inserted relatively into the bolt insertion holes 24 of the seat plate D, and each bolt 1
When the nut 2 and the nut N are firmly screwed together and tightened, as shown in FIGS. 8 and 10, the lower plate portion 11b of the fitting body 11 is formed.
The inner surface is in close contact with the inner peripheral surface of the sewer main pipe P _1, with rigid and the rubber plate portions 21 and 22 of soft constituting the seat plate D is compressed and deformed, elongated hole of the bolt member insertion hole 7 The outer peripheral portion of the bolt body 12 bites into the inner peripheral surface of the small-diameter portion 24a of the bolt body insertion hole 24 of the seat plate D while firmly adhering to the peripheral edge portion. in a state where the portion of the bolt member 12 is reliably sealed, the fitting body B is fixed via a pair of fasteners R to the portion of the main pipe opening H ₁ of the sewage mains P _1. Thereafter, when inserting the branch pipe P ₂ to the branch pipe insertion portion 2b of the branch pipe socket 2 of the joint body B, the branch pipe P ₂ is T-shaped with respect to sewer main pipe P ₁ via the joint body B Connected to.

When the joint body B is fixed to the sewage main pipe P ₁ as described above, the sealing material 6 inserted into the sealing groove 5 on the back surface side of the sealing plate portion 1 is elastically deformed, together in close contact with the periphery of the main pipe opening H ₁ of the outer peripheral surface of the sewer main pipe P _1, the cored bar 3 which is embedded in the sealing plate 1, in order to deformation of the seal plate 1 is prevented, seal between the outer peripheral surface and the bottom surface of the sealing plate 1 of the sewer main pipe P ₁ (back side) is ensured. Further, a pair of bolt body insertion holes 7 provided in the seal plate portion 1 and a bolt body 12 of the fixture R are provided.
Is sealed by compression deformation of the hard and soft rubber plate portions 21 and 22 constituting the seat plate D,
As described above.

Further, the method of connecting branch pipe P ₂ described above, as in the conventional connection method, not using an adhesive, moreover keep in assembling a pair of fastener R relative to the joint body B after the wanted against the fitting body B relative to sewer main pipe P _1, is slid so as to be spaced apart from each other a pair of fasteners R, the fitting adherend 11 sewage mains P ₁ of the main pipe opening H since then fitted to the peripheral portion of _1, can be fixed by attaching the joint body B immediately against sewer main pipe P _1, yet gone also necessary to ensure the curing time of the adhesive, the branch pipe P
After connection ₂ , the excavated soil can be immediately backfilled. As a result, it is possible to perform the operation of connecting the branch pipe P ₂ for sewer mains P ₁ in a short time, its workability is improved remarkably.

Next, the above-mentioned joint body B and a pair of fixtures
Separate the R and the main sewer P₁Fittings against
A case where the main body B is fixed will be described. First, FIG.
Sewage main P₁Main opening H₁Rim of
At two points along the longitudinal direction of the
By fitting the R fitting body 11, the sewage main pipe P ₁
With a pair of bolt bodies 12 standing on the outer peripheral surface of
Good. In this state, as shown in FIG.₁
Main opening H₁So that the joint body B
And into a pair of bolt body insertion holes 7 of the joint body B.
On the other hand, the bolts 12 are relatively inserted. last
, Sewer main P₁Each bolt body 1 protruding from the outer peripheral surface of
2 relative to the bolt body insertion hole 24 of the seat plate D.
Then, each bolt body 12 and nut N are screwed firmly.
8, as shown in FIG.
Water main P₁Is fixed to the joint body B.

Thus, the joint body B and the pair of fixtures R
In a method in which the bolt body insertion hole provided in the joint body B is not necessarily formed in a long hole shape, it is sufficient that the bolt body insertion hole has a circular shape corresponding to the outer diameter of the bolt body 12. There is an advantage that the sealing performance of the bolt body insertion hole can be easily ensured.

Next, a branch pipe joint device according to a second embodiment of the present invention will be described. The same parts as those in the first embodiment are denoted by the same reference numerals, and only the parts unique to the second embodiment will be described, without redundant description. In the branch pipe joint device of the second embodiment, the core metal 3 is not embedded in the seal plate portion 1 'constituting the joint body B' as in the first embodiment, and the whole is made of rubber. Is molded. Then, in the second embodiment, 'time fix, and after fixing,該継hand body B' joint body B for sewer mains P ₁ in order to prevent the can is deformed, the separate metallic Only the configuration using the deformation preventing plate 31 is different from the first embodiment. The metal deformation preventing plate 31 has the same shape as the seal plate portion 1 ′ constituting the joint body B ′,
Its cross-sectional shape is not a circular arc shape corresponding to the outer diameter of the sewer mains P _1, in its central portion, preventing plate opening 32 of substantially the same diameter as the main pipe opening H ₁ is formed, the opening 32 A bolt body insertion hole 33 having the same shape as the bolt body insertion hole 7 of the seal plate portion 1 'is formed on both sides of the bolt.

Then, in the same manner as described above, as shown in FIG. 12, the joint body B 'and the pair of fixtures R are integrally assembled, or the pair of fixing members R are kept separate from each other. through the ingredients R attaching the joint body B 'with respect to sewer main pipe P ₁ in temporarily fixed state. Next, the outer peripheral surface of the seal plate portion 1 'of the joint body B' is covered with a metal deformation preventing plate 31, and each bolt body 12 protruding from the deformation preventing plate 31 is moved relative to the seat plate D. After insertion into each bolt body 1
When the nut 2 and the nut N are screwed together firmly, as shown in FIG. 13, the outer peripheral surface of the seal plate portion 1 'is covered with the deformation preventing plate 31, and the deformation of the seal plate portion 1' is prevented. in a state of being, joint body B 'is fixed to the sewer main pipe P ₁ via a pair of fasteners R.

Subsequently, the third embodiment of the present invention will be described only for parts different from the first and second embodiments. In the third embodiment, as shown in FIG. 14, the maximum fitting thickness (T) of the fitting body 11 ″ constituting the fixing tool R ″ is different for a plurality of types of sewage main pipes P ₁ having different pipe thicknesses. have defined dimensioned so as to be fitted against, in the illustrated example, it is fitted against the sewer main pipe P ₁ of the tube thickness of about half of the maximum fitting ChakuAtsu (T). As described above, by increasing the maximum fitting thickness (T) of the fitting body 11 ″ constituting the fixing tool R ″, the thickness of the sealing plate portion 1 ″ increases, and only the peripheral edge portion of the sealing plate portion 1 ″ becomes the other. The core metal 3 ″ formed thinner than the portion and embedded in the seal plate 1 ″ has an outer peripheral edge corresponding to a change in the thickness of the seal plate 1 ″.
It has been bent.

Further, the branch pipe joint apparatus of the above embodiments, although both are examples used to connect the branch pipe P ₂ relative to sewer main pipe P ₁ being underground, the present invention The branch pipe joint device according to (1) can also be used for connecting a branch pipe to another underground pipe for sewerage such as a manhole.

[0026]

According to the present invention, since the branch pipe joint device can be fixed to the underground pipe material such as sewage main pipe with high sealing property and in a short time, the workability for connecting the branch pipe can be improved. Is greatly increased.

[Brief description of the drawings]

FIG. 1 is a partially broken perspective view of a branch pipe joint device according to a first embodiment of the present invention.

FIG. 2 is a perspective view of a joint main body B configuring the branch pipe joint device as viewed from a bottom surface side.

FIG. 3 is a longitudinal sectional view of the branch pipe joint device according to the first embodiment.

FIG. 4 is a joint body B mainly showing an arrangement position of a sealing material 6;
FIG.

FIG. 5 is an exploded perspective view of a fixture R, a seat plate D, and a nut N.

FIG. 6 is a joint body B in which a pair of fixtures R are integrally incorporated.
Which is a perspective view showing a state before fixing the sewer main pipe P _1.

[7] Also the joint main body B to sewer main pipe P ₁ via a pair of fasteners R is a perspective view showing a temporarily fixed state.

[8] which is also a perspective view showing a state in which the fitting body B is fixed to the sewer main pipe P ₁ via a pair of fasteners R.

[9] the outer peripheral surface of the sewer main pipe P ₁ wishes against the fitting body B, and a longitudinal sectional view of the fixing unit showing a state before sliding the pair of fasteners R.

10 is a longitudinal sectional view of the fixing portion in a state in which the fitting body B is fixed to the sewer main pipe P ₁ via a pair of fasteners R.

[11] In the joint body B and a pair of fasteners R separately, a method of fixing the fitting body B relative to sewer main pipe P _1, is a perspective view showing a state before fixing.

[12] using a pair of fasteners R and deformation inhibitor 31 shows 'a method of securing a fitting body B' joint body B a state is temporarily fixed to the sewer main pipe P ₁ It is a perspective view.

FIG. 13 is a perspective view showing a state where the joint body B ′ is fixed.

FIG. 14 is a view showing a state in which the joint body B ″ is connected to the sewage main pipe P using a fixing tool R ″ that can be used for a plurality of sewage main pipes having different pipe thicknesses.
FIG. 3 is a longitudinal sectional view of a fixing portion showing a state fixed to ₁ .

[Explanation of symbols]

B, B ', B ": joint body D: seat plate H _1: main pipe opening H _2: the joint opening N: Nut P _1: sewer mains P _2: branch pipe R, R": fixture 1,1' , 1 ": seal plate part 2: branch pipe socket 3: core metal 5: seal groove 6: sealing material 7: slotted bolt body insertion hole 11, 11": fitting body 12: bolt body 21: seat Hard rubber plate portion of plate 22: Soft rubber plate portion of seat plate 23: Metal plate portion of seat plate 31: Deformation prevention plate

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Shigeo Sueto 1253-14 Tateishi, Fujioka City, Gunma Prefecture Inside Azuma Rubber Industry Co., Ltd. In-house (72) Inventor Atsushi Noma 1-64 Yokone-cho, Obu-shi, Aichi Prefecture Chemical Industry Co., Ltd. (72) Inventor Kenji Adachi 1-64, Yoko-ne-cho, Obu-shi, Obu City, Aichi Chemical Industry F term (reference) 2D063 BA01 BA22 BA27 BA35 3H019 BA04 BB02 BB08 DA03

Claims (8)

[Claims] 1. A branch pipe joint device for connecting a branch pipe to an underground pipe such as a sewage main pipe in a T-shape, wherein the seal has an arc-shaped cross section corresponding to an outer diameter of the underground pipe. In the center of the plate part, a joint opening corresponding to the opening of the underground pipe material is opened, and a joint main body in which a branch pipe receiving port is integrally formed at a peripheral portion of the joint opening; A pair of fixing members in which a bolt body is integrally fixed in an upright posture to a fitting body fitted to two portions along the longitudinal direction of the opening periphery, and the branch is provided on a seal plate portion of the joint body. A pair of elongated bolt-shaped body insertion holes for inserting the bolt body of the fixture with the pipe receiving port interposed therebetween are provided in the longitudinal direction of the underground pipe material, and the joint is provided on an outer peripheral surface of the underground pipe material. With the main body kept in close contact, only the bolt body was projected outside through each of the bolt body insertion holes. The fixing device is slid in the longitudinal direction of the underground pipe material, and the fitting body is fitted to the respective portions of the opening periphery of the underground pipe material. , Wherein the bolt body and the nut are screwed together to fix the joint body to an opening peripheral portion of the underground pipe material. 2. A branch pipe joint device for connecting a branch pipe to an underground pipe such as a sewage main pipe in a T-shape, the seal having an arc-shaped cross section corresponding to an outer diameter of the underground pipe. In the center of the plate part, a joint opening corresponding to the opening of the underground pipe material is opened, and a joint main body in which a branch pipe receiving port is integrally formed at a peripheral portion of the joint opening; A pair of fixing members in which a bolt body is integrally fixed in an upright posture to a fitting body fitted to two portions along the longitudinal direction of the opening periphery, and the branch is provided on a seal plate portion of the joint body. A pair of bolt body insertion holes through which a bolt body of the fixture is inserted across a pipe receiving hole are provided in a longitudinal direction of the underground pipe material, and the pair of fixtures are disposed in a longitudinal direction of the underground pipe material. By sliding, the fitted body is fitted to each of the above-described portions of the opening periphery of the underground pipe material. There are, in close contact with the fitting body to the outer peripheral surface in the buried pipe material 該地, while being inserted through the bolts of the pair of fastener on the bolt body insertion hole,
A branch pipe joint device, wherein the bolt body and the nut are screwed together on an outer peripheral side of the seal plate portion to fix the joint body to an opening peripheral portion of the underground pipe material. 3. The branch pipe joint device according to claim 2, wherein the bolt body insertion hole has a long hole shape along a longitudinal direction of the underground pipe material. 4. The branch pipe coupling device according to claim 1, wherein a curved plate-shaped core is buried in a seal plate portion forming the joint main body. 5. A separate deformation preventing plate having an arc-shaped cross section for covering an outer peripheral side of a seal plate portion forming the joint main body to prevent the deformation thereof. 4. The branch pipe joint device according to any one of 1 to 3. 6. An annular seal groove is formed around a joint opening of a seal plate portion forming the joint body, and a seal material is inserted into the seal groove. The branch pipe joint device according to any one of the above. 7. The fitting thickness of the fitting body constituting the fixture is such that a plurality of underground pipes having different pipe thicknesses can be fitted. The branch pipe joint device according to any one of the above. 8. A seat plate having a rubber material fixed to a back surface thereof is interposed between a seal plate portion of the joint main body and the nut. The branch pipe joint device according to item 1.