JP2007332657A - Protective cover of impervious member for manhole and manhole using it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a protective cover of an impervious member for a manhole capable of protecting the impervious member against ultraviolet radiation and physical impact, and a manhole using it. <P>SOLUTION: The base part 11 of the protective cover 10 is a bottomed cylindrical body made chiefly of resin material and has an opening 130 on the side opposite to its bottom surface 12 along an axis direction a1. A hollow part 15 is the internal space of the base part 11 and open to the outside through the opening 130. The protective cover 10 is combined with a pit base 20 and the impervious member 30 to form the manhole. The pit base 20 has a pipe connection hole 210 that penetrates a sidewall. The impervious member 30 is a flexible cylindrical body having openings 31, 32 on both sides along the axis direction 1a and is mounted in the pit base 20 in such a way that the opening 32 surrounds the pipe connection hole 210. The protective cover 10 is mounted on the pit base 20, with the impervious member 30 enclosed in the hollow part 15. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a manhole water shielding member protective cover and a manhole using the same.

  In general, a manhole for maintenance management and the like is connected to a drain pipe network constituting the water and sewage system. In the concrete connection structure between the manhole and the drain pipe, one of the important technical problems is to prevent a water leakage accident from occurring at the connection point between the two.

  As a means for this, for example, in a manhole disclosed in Patent Document 1, a pipe joint portion projects from the bottom block, and a water shielding member is externally fitted to the pipe joint portion. Specifically, the water shielding member is a cylindrical body using an elastic material such as rubber, and one end is externally fitted so as to cover the protruding surface of the pipe joint portion, and this external fitting portion is a fixed band. It is tightened by.

  Moreover, in the bottom block for manholes disclosed in Patent Document 2, one end of the water shielding member is embedded in the protruding surface of the pipe joint portion. That is, Patent Document 2 is intended to improve the water leakage prevention function and improve the efficiency of the mounting work for the water shielding member shown in Patent Document 1.

  By the way, conventionally, when embedding manholes in the ground, sand has been used for backfilling excavated installation holes. However, in the construction method using sand for backfilling the installation hole, it was found that liquefaction occurred in the backfill soil of the manhole at the time of the earthquake, and it was easy to cause a water leak accident due to the fall of the drain pipe, and also a manhole collapse accident. It was. In order to avoid such a liquefaction phenomenon, in recent years, crushed stone has been used to backfill manhole installation holes.

  The manhole disclosed in Patent Documents 1 and 2 cannot sufficiently cope with the recent technical trend in which crushed stone is used for backfilling the installation hole. For example, in the manhole disclosed in Patent Documents 1 and 2, since the water shielding member is made of an elastic material such as rubber, there is an extremely high risk of breakage due to crushed stone.

  Also, this type of manhole is not buried immediately after manufacturing. Usually, a manhole after production is stored outdoors until shipment, and then buried after passing through processes such as transportation to a construction site and storage at the construction site. Accordingly, the longer the process in which manholes are stored outdoors, including during transportation, the higher the risk of material deterioration due to exposure of the water shielding member to ultraviolet rays.

  Furthermore, the longer the process of storing the manhole outdoors, the higher the risk that the water shielding member will be damaged by an unexpected physical shock applied from the outside.

In particular, the necessity of protecting the water shielding member from ultraviolet rays and physical impact is different from Patent Document 1 in which the water shielding member can be attached and detached, and Patent Document 2 in which the water shielding member is embedded in the pipe joint portion. Appears prominently.
Japanese Patent Laid-Open No. 2002-266361 Japanese Patent No. 3708539

  An object of the present invention is to provide a manhole impermeable member protective cover for manholes which can protect the impermeable member from deterioration of materials due to ultraviolet rays and damage due to physical impact, and a manhole using the same. is there.

  Another object of the present invention is to provide a manhole impermeable member protective cover for manhole that can protect the impermeable member from damage caused by backfilled crushed stone, and a manhole using the same.

  In order to solve the above-described problems, a manhole water shielding member protective cover (hereinafter simply referred to as a protective cover) according to the present invention has a base portion and a hollow portion. The base portion is a bottomed cylindrical body mainly made of a resin material, and has an opening on the side facing the bottom surface in the axial direction. The hollow portion is an internal space of the base portion and is opened to the outside through the opening.

  The protective cover according to the present invention is used by being attached to the pipe joint portion of the eaves base constituting the manhole. Hereinafter, a manhole configured using the protective cover according to the present invention will be described. The manhole according to the present invention includes a saddle base, a water shielding member, and a protective cover.

  The rod base has a pipe connection hole that penetrates the side wall from the outer surface to the inner surface. The water-impervious member is a flexible cylindrical body having openings on both sides in the axial direction, and one of the openings is attached to the base so as to surround the pipe connection hole. .

  Here, since the protective cover is attached to the base with the water shielding member housed in the hollow part, the water shielding member is protected from ultraviolet rays in the process of manhole storage outdoors and in the transportation process. Can be protected.

  Moreover, the protective cover is attached to the ridge base | substrate in the state which accommodated the water shielding member in the hollow part. Therefore, in the process where the manhole is stored outdoors and in the transportation process, the water shielding member can be protected from an unexpected physical impact applied from the outside.

  In the state where the manhole according to the present invention described above is buried in the ground, the drain pipe penetrates the water shielding member and the water shielding member protective cover for the manhole, and is guided and connected to the inside of the pipe connection hole. Has been. According to this configuration, the protective cover is attached to the base with the water shielding member housed in the hollow portion. Therefore, even if crushed stone is used for backfilling the installation hole, the protective cover is protected from damage caused by the crushed stone. The water member can be protected.

  In addition, since the base portion of the protective cover is mainly made of a resin material, it can be easily cut to allow the drain pipe to penetrate the protective cover.

  Other objects, configurations and advantages of the present invention will be described in more detail with reference to the accompanying drawings. The accompanying drawings are merely examples.

  As described above, according to the present invention, the following effects can be obtained.

  (1) It is possible to provide a manhole impermeable member protective cover for manhole that can protect the impermeable member from deterioration of the material due to ultraviolet rays and damage due to physical impact, and a manhole using the same.

  (2) It is possible to provide a manhole impermeable member protective cover for manhole that can protect the impermeable member from damage caused by backfilled crushed stone, and a manhole using the same.

  1 is a perspective view of a protective cover according to an embodiment of the present invention, FIG. 2 is a perspective view of the protective cover shown in FIG. 1 viewed from the back side, and FIG. 3 is a front sectional view of the protective cover shown in FIG. . The protective cover shown in FIGS. 1 to 3 has a base portion 11 and a hollow portion 15.

  The base portion 11 has flexibility or rubber elasticity, preferably a synthetic resin material such as polyethylene (PE), polypropylene (PP), vinyl chloride resin (PVC), other natural resin materials, Furthermore, the main material is synthetic rubber such as styrene-butadiene rubber (SBR).

  The base body 11 is a bottomed cylindrical body and has an opening 130 on the side facing the bottom surface 12 in the axial direction a1. More specifically, the base 11 shown in FIGS. 1 to 3 has a bottom surface 12 at one end side in the axial direction a1 indicated by a one-dot chain line, and other axial directions a1 opposed to the bottom surface 12. An opening surface 13 is provided on the end side.

  The opening surface 13 has an area having a larger diameter than the bottom surface 12. The opening surface 13 has an opening 130 in the surface, and a portion other than the opening 130 forms a flange 131. The collar 131 preferably has an uneven surface, so that the adhesive force when the protective cover is adhered to the manhole using an adhesive can be improved.

  The base portion 11 has a diameter dimensional change portion 14 between the bottom surface 12 and the opening surface 13, and the bottom surface 12 has a cylindrical shape with the same diameter size across the change portion 14. 14, the opening surface 13 side is tapered and has a divergent shape.

  The hollow portion 15 is an internal space of the base body portion 11 and is opened to the outside through the opening 130. The hollow portion 15 shown in FIG. 1 to FIG. 3 is partitioned by an inner peripheral surface along the outer shape of the base portion 11, and a diameter dimension changing portion is provided between the inner surface of the bottom surface 12 and the opening 130. The bottom surface 12 side has a cylindrical shape with the same diameter across the change portion, and the opening surface 13 side has a tapered end-spread shape (trumpet shape) across the change portion.

  The protective cover shown in FIGS. 1 to 3 is used by being attached to a bottom lump portion of a so-called monolithic manhole or a bottom lump block of a divided assembly type manhole. Next, a manhole using the protective cover shown in FIGS. 1 to 3 will be described.

  4 is a perspective view showing the manhole according to an embodiment of the present invention with a part thereof omitted, FIG. 5 is a perspective view showing an exploded structure of the manhole shown in FIG. 4, and FIG. 6 is a perspective view of the manhole shown in FIG. It is a fragmentary sectional view. The embodiment shown in FIGS. 4 to 6 may be either a sewage manhole or a rainwater manhole. 4 to 6, the same reference numerals are given to the same components as those shown in FIGS. 1 to 3.

  The manhole shown in FIGS. 4 to 6 further includes a saddle base 20 and a water shielding member 30 in addition to the protective cover 10 described with reference to FIGS. 1 to 3.

  The saddle base 20 is a molded body mainly made of synthetic resin, concrete, or the like, and has an internal space 200 and a pipe joint portion 21.

  First, the internal space 200 is surrounded by the side wall of the heel base 20 and the internal bottom surface. On the other hand, the pipe joint part 21 is constituted by the side wall of the saddle base 20, and the outer surface 211 of the side wall of the pipe joint part 21 projects from the saddle base 20 in the axial direction a 1. Furthermore, the pipe joint part 21 has a pipe connection hole 210 that penetrates the side wall of the flange base 20 from the outer surface 211 to the inner surface (inner space 200). 4 to 6, the opening end surface on the outer surface 211 side has a larger hole diameter than the opening end surface on the inner space 200 side, and the inner peripheral surface thereof is tapered.

  The water-impervious member 30 is a flexible cylindrical body, and has openings 31 and 32 on both sides in the axial direction a1, and the one opening 32 serves as an opening end surface of the pipe connection hole 210. It is attached to the saddle substrate 20 so as to surround it. More specifically, the water-impervious member 30 shown in FIGS. 4 to 6 has a small-diameter opening 31 and a large-diameter opening 32, and the diameter is between the small-diameter opening 31 and the large-diameter opening 32. It has a change part. The water shielding member 30 has a large-diameter opening portion 32 embedded in the side wall of the pipe joint portion 21 and rises from the outer surface 211 so as to cover the opening end surface of the pipe connection hole 210.

  The protective cover 10 is fixed on the pipe joint portion 21 so that the flange 131 surrounds the water shielding member 30, and is attached to the outer surface 211 in a state where the water shielding member 30 is housed in the hollow portion 15. The protective cover 10 is preferably detachably fixed on the projecting surface 211 using a peelable adhesive, a temporary fixing tape, or the like.

  According to the configuration of the manhole shown in FIGS. 4 to 6, the protective cover 10 is attached to the eaves base 20 with the water shielding member 30 stored in the hollow portion 15, so that the manhole is stored outdoors. The water shielding member 30 can be protected from ultraviolet rays in the process of transporting and transporting.

  Further, the protective cover 10 is attached to the eaves base 20 in a state where the water shielding member 30 is housed in the hollow portion 15. Therefore, in the process where the manhole is stored outdoors and in the transportation process, the water shielding member 30 can be protected from an unexpected physical impact applied from the outside.

  The manholes shown in FIGS. 4 to 6 are further disposed in the installation holes, connected to the drainage pipes, and then buried in the ground by being backfilled to constitute a part of the underground drainage pipe network. FIG. 7 is a partial cross-sectional view of a manhole according to another embodiment of the present invention. In FIG. 7, the same components as those shown in FIGS. 1 to 6 are denoted by the same reference numerals.

  The manhole shown in FIG. 7 has a foundation 40, a bottom block 41, a straight wall block 42, and a slanted wall block 43, which are stacked inside the installation hole 60 in the order described above.

  The bottom block 41 is an embodiment of the saddle base 20 described with reference to FIGS. 3 and 4. The bottom outer surface is stably placed on the foundation 40, and the straight wall block 42 is provided at the upper end. Are stacked.

  Furthermore, the bottom block 41 shown in FIG. 7 is provided with two pipe joint portions 21 and 22, the pipe joint portion 21 is used as an outflow hole portion, and the pipe joint portion 22 is used as an inflow hole portion. . Although the number of the pipe joint parts 21 used as the outflow hole part is one, the pipe joint part 22 used as the inflow hole part can be configured to include one or a plurality as necessary.

  In the manhole shown in FIG. 7, the two pipe joint portions 21 and 22 are connected to an invert portion (not shown) provided on the inner bottom surface of each of the pipe connection holes 210 and 220 in an axial direction. A straight drainage channel is formed toward a1.

  In addition, the manhole has two drain pipes 71 and 72, and the drain pipes 71 and 72 are arranged inside the installation hole 60 in a state where the drain pipes 71 and 72 are connected to the pipe connection holes 210 and 220, respectively. The manhole is filled with crushed stone 80. According to the configuration in which the crushed stone 80 is filled around the manhole, it is possible to reduce the risk of liquefaction occurring in the backfill soil around the manhole when an earthquake occurs.

  The water shielding member 30 has a large-diameter opening 32 embedded in the side walls of the pipe joint portions 21 and 22, rising from the outer surfaces 211 and 221, and the small-diameter opening 31 covering the outer peripheral surfaces of the drain pipes 71 and 72. Thus, it is crimped to the drain pipes 71 and 72. A space is formed between the water shielding member 30 and the drain pipes 71 and 72 connected to the pipe connection holes 210 and 220.

  The advantages of the protective cover 10 described with reference to FIGS. 1 to 7 will be further described with reference to FIGS. 8 to 11 are diagrams showing a construction method of the manhole shown in FIG. 8 to 11, the same components as those illustrated in FIGS. 1 to 7 are denoted by the same reference numerals.

  First, referring to FIGS. 8 and 9, in the step of connecting the drain pipes 71 and 72 to the pipe joint portions 21 and 22 of the bottom block 41, the cutting line 16 near the bottom surface 12 of the protective cover 10 is indicated by a one-dot chain line. And the water shielding member 30 is exposed to the outside. 8 and 9, the protective cover 10 is preferably temporarily attached to the outer surfaces 211 and 221 of the pipe joint portions 21 and 22, so that the protective cover 10 is adhered to the outer surfaces 211 and 221. The cutting process along the cutting line 16 may be performed, or the protective cover 10 may be once removed from the outer surfaces 211 and 221 and then the cutting process along the cutting line 16 may be performed. In FIG. 8, since the cutting line 16 is set out of the bottom surface 12, the entire bottom surface 12 is opened as shown in FIG.

  Referring to FIG. 10, after the cutting process shown in FIGS. 8 and 9, the protective cover 10 is positioned so that the axial direction a <b> 1 of the protective cover 10 coincides with the axial direction a <b> 2 of the drain pipes 71 and 72. , 72 are guided through the cut end surface (bottom surface 12) of the protective cover 10 and the opening 31 of the water shielding member 30 into the pipe connection holes 210, 220. At this time, the protective cover 10 is peeled from the outer surfaces 211 and 221 and temporarily moved onto the drain pipes 71 and 72. And the connection part of the drain pipes 71 and 72 and the water shielding member 30 is exposed, and the surface of the drain pipes 71 and 72 and the inner peripheral surface of the opening of the water shielding member 30 in contact therewith are, for example, The adhesive 50 is used to securely adhere and fix.

  Referring to FIG. 11, after the connecting step shown in FIG. 10, the protective cover 10 is again pulled back to the pipe joint portions 21 and 22, and the water shielding member 30 is accommodated in the hollow portion 15, and the collar portion 131. Are bonded to the outer surfaces 211 and 221 and the inner peripheral surface near the opening 130 on the bottom surface 12 side and the outer peripheral surface of the opening 130 of the water shielding member 30 are securely bonded using the adhesive 50. Fix it.

  The manhole described with reference to FIGS. 7 to 11 is placed in the installation hole 60, connected to the drain pipes 71 and 72, and then buried in the ground by being backfilled. In this backfilled state, the drain pipes 71 and 72 are guided into the pipe connection holes 210 and 220 through the protective cover 10 and the water shielding member 30. That is, since the water-impervious member 30 is covered with the protective cover 10, even if the crushed stone 80 is used for backfilling the installation hole 60, the risk of the water-impervious member 30 being damaged by the crushed stone 80 is avoided. Can do.

  And since the base | substrate part 11 of the protective cover 10 uses the resin material as the main material, the cutting process for making the drain pipes 71 and 72 penetrate the protective cover 10 can be performed easily.

  The pipe connection holes 210 and 220 have a tapered inner peripheral surface, and when the drain pipes 71 and 72 are connected to the pipe connection holes 210 and 220, the drain pipes 71 and 72 are necked within a taper angle range. Can shake. Since the protective cover 10 has flexibility by using a resin material as a main material for the swinging operation of the drain pipes 71 and 72, it follows the swinging motion of the drain pipes 71 and 72. And can keep holding.

  Moreover, since the protective cover 10 rises from the outer surfaces 211 and 221 of the pipe joint portions 21 and 22, a space can be secured between the drain pipes 71 and 72 connected to the pipe connection holes 210 and 220. . This space is a moving space when the drain pipes 71 and 72 swing in the range of the taper angle, and the flexible protective cover 10 is deformed following the movement of the drain pipes 71 and 72. It becomes the deformation space for. Accordingly, as shown in FIGS. 12 and 13, the water-impervious member 30 drains when the drain pipes 71, 72 connected to the pipe connection holes 210, 220 swing in the range of the taper angle. The movement of the tubes 71 and 72 can be followed and kept without hindering the movement.

  FIG. 14 is a perspective view of a protective cover 10 according to another embodiment of the present invention, and FIG. 15 is a front sectional view of the protective cover 10 shown in FIG. 14 and 15, the same components as those shown in FIGS. 1 to 13 are denoted by the same reference numerals.

  In the embodiment of the protective cover 10 shown in FIGS. 14 and 15, the cutting line 16 indicated by the alternate long and short dash line in FIG. 8 is formed in the vicinity of the bottom surface 12 as the cutting groove 16 in advance. According to this structure, the cutting process of the protective cover 10 shown in FIGS. 8 and 9 can be performed quickly and accurately.

  16 is a perspective view of the protective cover 10 according to still another embodiment of the present invention, and FIG. 17 is a front sectional view of the protective cover 10 shown in FIG. FIG. 18 is a partial cross-sectional view of a manhole using the protective cover 10 shown in FIG. 16 to FIG. 18, the same reference numerals are given to the same components as those shown in FIG. 1 to FIG.

  The embodiment of the protective cover 10 shown in FIGS. 16 to 18 has a cutting groove 16 in the surface of the bottom surface 12 according to the diameter of the drainage pipe to be connected. According to this structure, in the manhole installation method shown in FIGS. 8 and 9, the step of cutting the bottom surface 12 along the cutting groove 16 and guiding the drain pipe 71 into the pipe connection hole 210 is performed quickly and accurately. It can be carried out.

  Although the contents of the present invention have been specifically described above with reference to the preferred embodiments, it is obvious that those skilled in the art can take various modifications based on the basic technical idea and teachings of the present invention. It is.

It is a perspective view of the water-blocking member protection cover for manholes concerning one embodiment of the present invention. It is the perspective view which looked at the water-blocking member protection cover for manholes shown in FIG. 1 from the back side. It is front sectional drawing of the water-blocking member protection cover for manholes shown in FIG. It is a perspective view which omits and shows a part of manhole which concerns on one Embodiment of this invention. It is a perspective view which shows the decomposition | disassembly structure of the manhole shown in FIG. It is a fragmentary sectional view of the manhole shown in FIG. It is a fragmentary sectional view of the manhole which concerns on another embodiment of this invention. It is a figure which shows the construction method of the manhole shown in FIG. It is a figure which shows the process after the process shown in FIG. FIG. 10 is a diagram showing a step after the step shown in FIG. 9. It is a figure which shows the process after the process shown in FIG. It is sectional drawing which abbreviate | omits and shows the usage aspect of the manhole shown in FIG. It is sectional drawing which abbreviate | omits and shows the usage aspect of the manhole shown in FIG. It is a perspective view of the water-proof member protection cover for manholes concerning another embodiment of the present invention. It is front sectional drawing of the water-blocking member protection cover for manholes shown in FIG. It is a perspective view of the water-blocking member protection cover for manholes concerning another embodiment of the present invention. FIG. 17 is a front cross-sectional view of the manhole water shielding member protective cover shown in FIG. 16. FIG. 17 is a partial cross-sectional view of a manhole using the manhole water shielding member protective cover shown in FIG. 16.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Protective cover 11 Base part 12 Bottom surface 130 Opening part 15 Hollow part 20 桝 Base 210,220 Pipe connection hole 30 Water shielding member 31, 32 Opening part 41 Bottom block 71, 72 Drain pipe

Claims (3)

A manhole waterproof member protective cover having a base portion and a hollow portion,
The base portion is a bottomed cylindrical body mainly made of a resin material, and has an opening on the side facing the bottom surface in the axial direction.
The hollow portion is an internal space of the base portion, and is open to the outside through the opening.
Protective cover for manholes. A manhole including a base, a water shielding member, and a manhole water shielding member protective cover,
The saddle base has a pipe connection hole that penetrates the side wall from the outer surface to the inner surface,
The water-impervious member is a flexible cylindrical body having openings on both sides in the axial direction, and one of the openings is attached to the saddle base so as to surround the pipe connection hole. And
The manhole water-blocking member protective cover is the one described in claim 1, and is attached to the base in a state where the water-blocking member is housed in the hollow portion.
manhole. The manhole according to claim 2, wherein the drain pipe penetrates the water shielding member and the manhole water shielding member protective cover in a state of being buried in the ground, and Guided and connected inside,
manhole.

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