JP3825775B2 - Spacer for auxiliary fitting in manhole - Google Patents

Description

  The present invention relates to a manhole sub-pipe apparatus for flowing sewage from a sewer sewer pipe to a sub-pipe provided in a manhole, and a saddle portion and a manhole of a sub-joint body in a manhole that communicates the sewer pipe and the inner sub-pipe. It is related with the spacer of the sub pipe joint in a manhole arrange | positioned between the inner peripheral wall surfaces of.

  In general, a concrete manhole has a structure in which a sewage inflow hole is formed in an inner peripheral wall surface, and a sewage pipe is connected to the sewage inflow hole so that sewage flows into the manhole. In this configuration in which sewage flows into the manhole from the sewage pipe, if there is a large drop from the position of the sewage inflow hole to the invert part at the bottom of the manhole, a so-called waterfall falls, and the invert part of the manhole There is a problem in that erosion is eroded, trash and other garbage are scattered, and noise is generated.

  Therefore, the response varies depending on the local government. For example, according to the design guidelines of the Japan Sewerage Association, a sub-pipe is provided in the manhole when the drop of sewage flowing into the manhole is 600 mm or more.

  On the other hand, sewage pipes and pipe joints made of synthetic resin are widely used due to ease of handling, economy, and ease of construction, etc., and sewage pipes connected to manhole sewage inflow holes. Synthetic resin products are used for the inner sub pipe connected to the hole and the joint connecting the sewer pipe and the inner sub pipe.

  Conventionally, the end portion of the sewer pipe formed of synthetic resin is inserted into the sewage inflow hole opened in the inner peripheral wall surface of the manhole, and the saddle portion is fixed to the inner peripheral wall surface of the manhole in the end portion of the sewage pipe. A construction has been adopted in which a sub pipe joint in a manhole made of synthetic resin is connected, and a sub pipe formed of a synthetic resin is connected to the sub pipe joint in the manhole (see, for example, Patent Document 1).

However, the surface pressed against the inner peripheral wall surface of the manhole in the saddle portion of the sub-joint in the manhole is formed into a curved surface that matches the curved surface of the inner peripheral wall surface of the manhole, and the manhole depends on the size of the inner peripheral wall surface. Since the curvature of the curved surface is different, it is necessary to change the curvature of the saddle part according to the size of the manhole, and it is necessary to prepare inner and secondary pipe joints with different curvatures of the saddle part for each manhole size. The number of points increases, the unit price increases, and the inventory space becomes a problem.
Utility Model Registration No. 2592718 (Page 2, Fig. 3)

  The problem to be solved is that the number of assortment of sub-joints in manholes is increased due to the preparation of sub-joints in manholes according to the size of the manhole, resulting in problems in unit price and inventory management. .

  The present invention has been made in view of the above problems, and by preparing only a spacer according to the size of the manhole with a simple configuration, the same sub-joint in the manhole can be used for manholes having different sizes. The spacer of the sub pipe joint in a manhole made in this way is provided.

  The spacer of the sub-joint in a manhole according to the present invention has a sub-tube in a manhole in which a sewage inflow port is opened in a saddle portion fixed to an inner peripheral wall surface of the manhole and a sub-tube connection portion communicating with the sewage inflow port is opened in a lower end. A spacer disposed between the saddle portion of the joint body and the inner peripheral wall surface of the manhole, wherein one surface is formed into a curved surface substantially equal to the curved surface of the inner peripheral wall surface of the manhole, and the other surface Is formed on a curved surface that is substantially equal to the curved surface of the saddle portion of the sub-joint body in the manhole, and has a passage that is substantially equal to the sewage inlet opening in the saddle portion of the sub-joint body in the manhole on one surface. To the other surface.

  A sewage inflow hole is drilled in the manhole according to the position of the sewage pipe, and the sewage inflow hole opened in the joint body is aligned with the sewage inflow hole of the manhole, and a spacer is placed on the inner peripheral wall surface of the manhole. Fix by interposing.

  Also, the end of the sewage pipe communicates with the sewage inflow hole drilled in the manhole, and the open end of the sewage pipe communicates with the sewage inlet of the sub-joint body in the manhole. The secondary pipe is connected to the secondary pipe connecting portion, and the lower end opening of the secondary pipe is brought close to the invert portion of the manhole.

  The spacer interposed between the saddle portion of the sub-joint body in the manhole and the inner peripheral wall surface of the manhole has a curved surface substantially equal to the curved surface of the inner peripheral wall surface of the manhole, depending on the size of the manhole. By selecting a spacer that is formed on a curved surface that is substantially the same as the curved surface of the saddle portion of the sub-joint body in the manhole, the other surface can be selected even if the size of the manhole is different. A sub-joint in the same manhole can be used, the number of assortment can be reduced, it can be obtained at a low cost, inventory management is easy, and the inventory space can be reduced.

  Furthermore, since the spacer penetrated from the one side to the other side through a passage that is approximately the same as the sewage inlet opening in the saddle part of the sub-joint body in the manhole, the sewage from the sewage pipe is manholed even if the spacer is changed. The sewage inflow hole reliably flows into the sewage inlet of the sub-joint body in the manhole.

  In this state, the sewage flowing through the sewage pipe flows into the sewage inlet of the sub-joint body in the manhole from the opening of the terminal part, and is connected to the sub pipe connection part of the sub pipe joint body in the manhole. To the manhole invert. At this time, there is almost no drop from the lower end opening of the secondary pipe to the invert part of the manhole, and the invert part is not eroded by sewage.

  Moreover, the spacer of the sub pipe joint in a manhole of this invention forms an annular groove on one surface which contacts the inner peripheral wall surface of a manhole, and provided the water stop packing in this annular groove.

  And, the water-tight packing interposed between the spacer and the inner peripheral wall surface of the manhole keeps the inner peripheral wall surface of the manhole and the sub-joint in the manhole liquid-tight. Water leakage does not occur from the saddle portion of the pipe joint, and the water-stopping packing is provided in the annular concave groove of the spacer, so that water can be reliably stopped without being displaced.

  Furthermore, the spacer of the sub pipe joint in a manhole of this invention is shape | molded with the elastic body.

  And the spacer itself has the function of water-stopping packing, and the water-stopping packing arranged between the spacer and the inner peripheral wall surface of the manhole can be omitted in some cases, the workability is improved, and it can be constructed at low cost. By using the water-stop packing together, water leakage can be achieved more reliably, and the inner wall surface of the manhole is not contaminated with leaked sewage.

  The spacer of the sub-joint in the manhole of the present invention can use the same sub-joint in the manhole by selecting the spacer even if the size of the manhole is different. In addition to being obtained, inventory management is easy and the inventory space can be reduced.

  In addition, between the inner peripheral wall surface of the manhole and the sub-joint in the manhole is kept liquid-tight from the water-stop packing, and sewage does not leak from the inner peripheral wall surface of the manhole and the saddle portion of the sub-joint in the manhole. In addition, the water stop packing can reliably stop water without being displaced.

  Further, the spacer itself has a function of water-stop packing, and the water-stop packing disposed between the spacer and the inner peripheral wall surface of the manhole can be omitted, so that the workability is improved and the work can be performed at low cost.

  An embodiment of the present invention will be described with reference to the drawings.

  The sub-joint body 10 in the manhole is integrally formed of synthetic resin, and the joint body 10 is formed with an annular saddle portion 13 fixed to the inner peripheral wall surface 12 of the manhole 11 on one side of the outer peripheral surface. . The outer surface side of the saddle portion 13 is formed on a curved mounting surface 14 substantially along the inner peripheral wall surface 12 of the manhole 11, and the saddle portion 13 has an insertion hole for fixing means such as a fixing bolt. (Not shown) is formed.

  A sewage inlet 15 is opened in the saddle portion 13 of the joint body 10, and a horizontal pipe portion 16 having one end communicating with the sewage inlet 15 is formed. The horizontal pipe portion 16 faces the sewage inlet 15. The diameter has been expanded. Further, a horizontal pipe cleaning port 17 is opened at the other end of the joint body 10 in the horizontal pipe portion 16 so as to face the sewage inlet 15. An annular fitting edge 18 is formed on the outer peripheral surface of the peripheral edge of the horizontal tube cleaning port 17, and fixing holes (not shown) are formed on the upper and lower portions of the fitting edge 18, respectively.

  Further, the joint body 10 is formed with a vertical pipe portion 19 opened on the inner bottom surface of the horizontal pipe portion 16, and a sub pipe connection portion 20 is opened at the lower end of the vertical pipe portion 19. A cylindrical vertical tube cleaning port 22 is opened above the communication portion 21 between the vertical tube portion 19 and the horizontal tube portion 16.

  Further, the sewage inlet 15 having an enlarged diameter of the horizontal pipe portion 16 of the joint body 10 is formed to have a larger diameter than the sewage pipe 23 for allowing the sewage to flow into the manhole 11, and the horizontal pipe portion 16 is formed of the horizontal pipe cleaning portion. The vertical pipe portion 19 that is reduced in diameter toward the port 17 and communicates with the horizontal pipe portion 16 has an inner diameter that is the same as the inner diameter of the sewer pipe 23 or a smaller diameter than the inner diameter of the sewer pipe 23.

  Further, the communicating portion 21 of the vertical tube portion 19 formed on the inner bottom surface of the horizontal tube portion 16 of the joint body 10 has a guide surface 24 inclined in an arc from the horizontal tube portion 16 into the vertical tube portion 19. Is formed.

  Next, a horizontal lid body 25 formed of a synthetic resin that freely closes and opens the horizontal pipe cleaning port 17 of the joint body 10 is fitted to the horizontal pipe cleaning port 17 to close the horizontal pipe cleaning port 17. To do. The inner surface of the horizontal lid body 25 is formed in a shape along the inner peripheral surface of the vertical pipe portion 19, and the peripheral surface portion of the horizontal lid body 25 is fitted to the fitting edge 18 of the joint body 10. A fitting groove 27 for the water-stopping O-ring 26 is formed on the peripheral surface portion.

  Further, the horizontal lid body 25 is formed with insertion holes 29 at the upper and lower positions respectively communicating with the fixing holes formed in the fitting edge 18 of the horizontal pipe cleaning port 17 of the joint body 10. A fixing pin (not shown) inserted through the formed fixing hole is inserted into the fixing hole below the fitting edge 18 through the insertion hole 29 formed in the horizontal lid body 25, and the horizontal pipe cleaning port of the joint body 10. The horizontal lid body 25 fitted to the 17 fitting edges 18 is fixed, and the horizontal lid body 25 is prevented from coming off due to the water pressure flowing through the horizontal pipe portion 16.

  Further, the vertical tube cleaning port 22 of the joint body 10 is provided with a vertical lid (not shown) that closes the vertical tube cleaning port 22 so as to be freely opened and closed.

  Next, an annular recess 30 is formed on the outer surface of the saddle portion 13 of the joint body 10, and the recess 30 surrounds the sewage inlet 15 and the inner peripheral wall surface 12 of the manhole 11 and the saddle portion 13 of the joint body 10. An annular spacer 31 is provided between the two.

  A plurality of types of spacers 31 are provided depending on the size of the manhole 11.

  As shown in FIGS. 3 to 6, each spacer 31 is molded from a hard body such as vinyl chloride resin or an elastic body such as rubber, and is arranged on the inner peripheral wall surface 12 in accordance with the manhole 11 having a different size. One of the outer surfaces that are in pressure contact is formed on a curved surface 32 that is substantially equal to the curved surface of the inner peripheral wall surface 12 of the manhole 11, and the other inner surface is covered with the saddle portion 13 of the sub-joint body 10 in the manhole. A curved surface 34 that is substantially equal to the curved surface 33 of the mounting surface 14 is formed.

  In addition, the spacer 31 penetrates from one surface to the other through a through hole 35 substantially equal to the sewage inflow port 15 opened in the saddle portion 13 of the sub-joint body 10 in the manhole.

  Further, an engagement groove 37 that engages with an annular protrusion 36 formed in the saddle portion 13 is formed on the curved surface 34 of the other surface of the spacer 31, and the engagement groove 37 and the protrusion 36 are engaged with each other. Thus, the spacer 31 is positioned and held.

  Further, the spacer 31 is formed with an insertion hole 31 a corresponding to the insertion hole formed in the saddle portion 13.

  The spacer 31 has an annular groove 38 formed on one surface thereof that is in contact with the inner peripheral wall surface 12 of the manhole 11, and a water stop packing 39 is fitted into the annular groove 38.

  Next, the operation of this embodiment will be described.

  As shown in FIG. 7, a sewage inflow hole 40 is drilled in the manhole 11 in accordance with the position of the sewage pipe 23, and a manhole joint 41 formed of rubber or the like is fitted into the sewage inflow hole 40. Is fixed in the sewage inflow hole 40 with mortar or the like.

  Further, according to the size of the manhole 11, a spacer 31 having one surface formed on a curved surface 32 substantially equal to the curved surface of the inner peripheral wall surface 12 of the manhole 11 is selected. The saddle portion 13 is contacted, and the engagement groove 37 of the spacer 31 and the protrusion 36 are engaged to align the spacer 31 with the saddle portion 13.

  The spacer 31 provided on the saddle portion 13 is aligned with the sewage inlet 15 formed in the joint body 10 in the sewage inflow hole 40 of the manhole 11, and abuts against the inner peripheral wall surface 12 of the manhole 11, so that the saddle portion 13 The saddle portion 13 is fixed to the inner peripheral wall surface 12 of the manhole 11 with a fixing means such as a bolt inserted from the insertion hole into the insertion hole 31a of the spacer 31, and the horizontal pipe cleaning port 17 of the joint body 10 is closed with the horizontal lid body 25. At the same time, the vertical tube cleaning port 22 is closed with the vertical lid.

  In this state, the end portion of the sewage pipe 23 inserted through the sewage inflow hole 40 of the manhole 11 faces the sewage inlet 15 of the joint body 10.

  Further, a secondary pipe 42 formed of a synthetic resin is connected to the secondary pipe connecting portion 20 of the vertical pipe portion 19 of the joint body 10, and a bent pipe 43 is connected to the lower end of the secondary pipe 42 so that the secondary pipe is connected. The distal end of the bent pipe 43 serving as the lower end opening of 42 is opened in parallel with the invert portion 44 in the vicinity of the invert portion 44 of the manhole 11. In this state, the secondary pipe 42 is fixed to the inner peripheral wall surface 12 of the manhole 11 with the fixture 45.

  In this state, the sewage flowing through the sewage pipe 23 flows into the sewage inlet 15 of the joint body 10 from the end of the sewage pipe 23, and the sewage flowing in from the sewage pipe 23 flows laterally from the sewage inlet 15 of the joint body 10. The sewage flows into the pipe part 16 and flows out into the vertical pipe part 19 along the guide surface 24 inclined toward the inside of the vertical pipe part 19, and the sewage flows into the vertical pipe part 19 and from the lower end opening of the sub pipe 42. It flows into the invert part 44 of the manhole 11 and is sewed from the sewer pipe 46. At this time, there is almost no drop from the lower end opening of the sub pipe 42 to the invert section 44 of the manhole 11, and the invert section 44 is not eroded by the sewage flowing from the sewer pipe 23.

  The manhole 11 shown in FIG. 1 is, for example, a manhole No. 2 having an inner diameter of 1200 mm or a manhole larger than the No. 2 manhole, and a spacer interposed between the inner peripheral wall surface 12 of the manhole 11 and the sub-joint body 10 in the manhole. In accordance with the size of the manhole 11, one surface is formed on a curved surface 32 that is equal to the curved surface of the inner peripheral wall surface 12 of the manhole 11, and the other surface is the saddle portion 13 of the sub-joint body 10 in the manhole. By selecting the spacer 31 formed on the curved surface 34 equal to the curved surface 33, the same sub-joint body 10 in the manhole can be used even if the size of the manhole 11 is different. It can be reduced, it can be obtained at low cost, inventory management is easy, and the inventory space can be reduced.

  In addition, by forming the curved surface 33 of the mounted surface 14 of the saddle portion 13 of the sub-joint body 10 in the manhole, as shown in FIG. 2, for example, by forming a curved surface equal to a No. 1 manhole with an inner diameter of 900 mm, In the case of No. 1 manhole, without using the spacer 31, a water-stop packing 48 is attached to the saddle portion 13, and this saddle portion 13 is fixed to the inner peripheral wall surface 12 of the manhole 11 and the sub-joint body in the manhole. 10 can be attached to the inner peripheral wall surface 12 of the manhole 11 so as to be stopped by the water stop packing 48.

  Furthermore, since the spacer 31 penetrates from the one surface to the other surface through the passage 35 that is substantially equal to the sewage inlet 15 that opens in the saddle portion 13 of the sub-joint body 10 in the manhole, Sewage from the water pipe 23 surely flows from the sewage inflow hole 40 of the manhole 11 into the sewage inlet 15 of the sub-joint body 10 in the manhole.

  Further, an annular groove 38 is formed on one surface that is in contact with the inner peripheral wall surface of the manhole 11, and a water stop packing 39 is provided in the annular groove 38, whereby the spacer 31 and the inner peripheral wall surface 12 of the manhole 11 are formed. Between the inner peripheral wall surface 12 of the manhole 11 and the sub-joint 10 in the manhole is liquid-tightly held by the water-stopping packing 39 interposed between the inner peripheral wall surface 12 of the manhole 11 and the sub-joint body 10 in the manhole. Water does not leak from the saddle portion 13, and the water stop packing 39 is provided in the annular concave groove 38 of the spacer 31, so that water can be reliably stopped without being displaced.

  Further, the spacer is molded by an elastic body, so that the spacer 31 itself has a function of water blocking packing, and a water blocking packing 39 disposed between the spacer 31 and the inner peripheral wall surface 12 of the manhole 11 is provided. In some cases, it can be omitted, the workability is improved, it can be constructed at low cost, and it can be more reliably leaked by using the water-stop packing 39, and the inner wall surface of the manhole is contaminated with leaked sewage. There is no.

  In the embodiment, the spacer 31 is attached to the saddle portion 13 of the joint body 10 and the joint body 10 is fixed to the inner peripheral wall surface 12 of the manhole 11. However, the through hole 35 of the spacer 31 is connected to the inner periphery of the manhole 11. The spacer 31 is fixed to the sewage inflow hole 40 of the wall surface 12 with double-sided tape or the like, and in this state, the saddle portion 13 of the joint body 10 is aligned to the spacer 31 and fixed to the inner peripheral wall surface 12 of the manhole 11. Good.

It is a cross-sectional top view of the state which attached the sub pipe joint in the manhole which shows one embodiment of this invention. It is a cross-sectional top view which shows the state which attached the sub pipe joint in the manhole to the manhole of a magnitude | size different from the manhole shown in FIG. It is a front view which shows one side of the spacer shown in FIG. It is a rear view which shows the other surface of a spacer same as the above. It is a longitudinal cross-sectional view of a spacer same as the above. It is a cross-sectional view of a spacer same as the above. It is a longitudinal front view of the manhole which shows the state which attached the sub pipe joint in a manhole shown in FIG.

Explanation of symbols

10 Fitting body
11 Manhole
12 Inner wall surface
13 Saddle
15 Sewage inlet
20 Secondary pipe connection
31 Spacer
32 Curved surface of spacer 31
33 Curved surface of saddle 13
34 Curved surface of spacer 31
35 entrance
38 Annular groove
39 Water stop packing

Claims (3)

An inner periphery of the manhole and the saddle portion of the sub-joint body in the manhole having a sewage inlet opening in a saddle portion fixed to the inner peripheral wall surface of the manhole and a secondary pipe connecting portion communicating with the sewage inlet opening at a lower end. A spacer disposed between the wall surface and
One surface is formed in a curved surface substantially equal to the curved surface of the inner peripheral wall surface of the manhole,
The other surface is formed on a curved surface substantially equal to the curved surface of the saddle portion of the sub-joint body in the manhole,
And the spacer of the sub-joint in a manhole which penetrated the opening substantially equal to the sewage inflow port opened to the saddle part of the said sub-joint body in the said manhole from one surface to the other surface. An annular groove is formed on one surface that is in contact with the inner peripheral wall surface of the manhole,
The spacer for a sub-joint in a manhole according to claim 1, wherein a water-stop packing is provided in the annular groove.   The spacer for a sub-joint in a manhole according to claim 1 or 2, wherein the spacer is molded with an elastic body.

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