JP2003027514A - Pipe passage member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the workability markedly. SOLUTION: A pipe passage member 10 includes a manhole body 12 without rib, and an inlet part with rib 14 and an outlet part with rib 16 connectable with a pipe with rib are provided in an inlet port 20 and an outlet port 22, respectively. A protection member 18 is mounted in a part without rib. There is no possibility that a projection of crushed stone comes into contact with the part without rib directly when back filling the part without rib. Moreover, concentrated load acting on the part without rib by the crushed stone is reduced by the protection member. Consequently, all parts including the part without rib can be back filled by the crushed stones.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe member, and more particularly to a pipe member having, for example, a ribbed portion and a ribless portion. 2. Description of the Related Art When the ground on which a pipeline is laid is liquefied due to an earthquake or the like, the pipeline rises in the liquefied area, which may meander or break the pipeline. Therefore, conventionally, as shown in FIG. 9, a high-strength ribbed pipe 2 on which a rib 1 is formed constitutes a pipe line.
By burying this with crushed stone 3, the surrounding ground 4
Liquefaction was suppressed. And, among the members constituting the conduit, the ribless structure such as the manhole 5 where the rib is not formed is back-filled with the sand 6 in order to prevent damage due to the crushed stone 3. [0004] In the prior art, two types of backfill material (crushed stone 3 and sand 6) were required.
There was a problem that arranging, carrying in, and storing them were troublesome. In addition, there was a problem that the workability was poor because it was necessary to distinguish the locations where these backfill materials were used. [0005] Therefore, a main object of the present invention is to provide a pipe member in which all crushed stone can be backfilled and workability can be improved. SUMMARY OF THE INVENTION The present invention is a pipe member having a ribbed portion and a ribless portion, wherein the ribless portion is provided with a protective material. [0007] Since the protective material is attached to the ribless portion, there is no fear that the crushed stone directly hits the ribless portion when backfilling the ribless portion. In addition, the concentrated load acting on the ribless portion due to the crushed stone is reduced by the protective material. Therefore, all parts including the ribless part can be backfilled with crushed stone. According to the present invention, since all can be backfilled with crushed stone, there is no need to prepare two types of backfill material (crushed stone and sand) as in the prior art. There is no need to distinguish where the material is used. Therefore, the workability can be dramatically improved. The above objects, other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings. A pipe member 10 of this embodiment shown in FIG. 1 is a manhole provided in a sewage pipe, and is buried in crushed stone because it is buried in the ground which may be liquefied. It is. The conduit member 10 includes a manhole body 12, a ribbed inflow portion 14, a ribbed outflow portion 16, and a protective member 18. The manhole body 12 is made of a synthetic resin such as vinyl chloride and is formed, for example, in a substantially cylindrical shape with a bottom.
The side wall of the manhole body 12 is filled with sewage.
An inflow port 20 for flowing into 2 and an outflow port 22 for outflow are provided. The inflow port 20 has a predetermined diameter and is formed as an enlarged diameter receiving port, and the outflow port 22 has a predetermined diameter and is formed as a port. The upper end of the manhole body 12 is provided with a rubber ring receiving port 24 into which the lower end of the rising pipe 52 (FIG. 5) is inserted when used. A rubber ring receiving portion 26 is formed in the rubber ring receiving port 24, and a rubber ring (not shown) is mounted on an inner surface of the rubber ring receiving portion 26. And
The inlet 20 and the outlet 22 have a ribbed inlet 14 and a ribbed outlet 1 so that they can be connected to a ribbed pipe, respectively.
6 are provided. The ribbed inflow portion 14 is made of a synthetic resin such as vinyl chloride and is formed in a substantially cylindrical shape. Inflow section 14 with rib
A plurality of circumferential ribs 2 are provided on the outer surface of the
8 are formed. The ribbed inflow portion 14 is provided with an inflow port 20.
Includes a straight tube portion 30 having substantially the same inner diameter as the base portion, and a ribbed tube 32 (FIG. 5) at one end of the straight tube portion 30 when used.
The enlarged diameter receiving port 36 into which the outlet 34 is inserted is formed.
In addition, as can be seen from FIG. 2, the ribbed inflow portion 14 is connected to the inflow port 20 through the plain short tube 38 in this embodiment, so that the other end of the straight tube portion 30 is connected to the plain short tube 38. The diameter is expanded to approximately the same inner diameter as the outer diameter of. The plain short pipe 38 has an inside diameter substantially the same as the inside diameter of the base of the inflow port 20 and the straight pipe section 30. The other end of the plain short pipe 38 is connected to the inlet 2 so as to fit with the enlarged diameter receiving port 20 a of the inlet 20.
The outer diameter is increased to substantially the same outer diameter as the inner diameter of the diameter expansion receiving port 20a. The two ends of the plain short pipe 38 are the other end of the inflow portion 14 with ribs and the enlarged diameter receiving port 2 of the inflow port 20, respectively.
0a, the outer surface of one end of the plain short pipe 38 and the inner surface of the other end of the ribbed inflow portion 14 are adhesively bonded,
The outer surface of the other end of the plain short tube 38 and the inner surface of the enlarged diameter receiving port 20 a of the inflow port 20 are bonded and bonded. By interposing such a plain short pipe 38, the inflow port 20 and the inflow portion 14 with ribs are connected substantially smoothly on the inner surface. The outflow portion 16 with ribs is made of a synthetic resin such as vinyl chloride and is formed in a substantially cylindrical shape. Outflow part 16 with rib
A plurality of circumferential ribs 4 are provided on the outer surface of the
0 is formed. The outflow portion 16 with the rib is provided with an outlet 22.
And a straight pipe portion 42 having substantially the same inner diameter as
As can be seen from FIG. 3, the one end of the outlet is expanded to an inner diameter substantially equal to the outer diameter of the outlet 22. An outlet 22 is inserted into one end of the outflow portion 16 with ribs, and the inner surface of one end of the outflow portion 16 with ribs and the outer surface of the outflow port 22 are bonded and bonded. In addition, the other end of the straight pipe portion 42 is a port 44,
A rubber ring 46 is mounted between predetermined ribs 40 on the outer surface of the spigot 44. In use, the spigot 44 of the ribbed outflow portion 16 is inserted into the enlarged diameter receiving port 50 of the ribbed tube 48 (FIG. 5). The protection member 18 is for protecting the ribless portion. The protection member 18 is formed in a sheet shape as shown in FIG. 4A, and includes a skin layer 54 and a foam layer 56 as can be seen from FIG. 4B. Skin layer 54
Consists of polyethylene, polypropylene, rubber, etc.
It has such a strength that it does not break even if it is backfilled with crushed stone 58 (FIG. 5) during use. The foam layer 56 is made of a foam of a constituent material of the skin layer 54, for example, foamed polyethylene, foamed polypropylene, foamed rubber, or the like, and the foamed layer 56 reduces external force acting on the crushed stone 58 on the portion without ribs. Then, an appropriate number of protective members 18 having an appropriate shape and size are attached so as to cover the portion without ribs, that is, the entire outer surface of the manhole body 12. Specifically, as can be seen from FIGS. 2 and 3, the protective material 18 is wound around the outer surfaces of the side wall, the inlet 20 and the outlet 22 such that the skin layer 54 is on the outer surface (crushed stone 58 side). As shown in FIG.
Is fixed by Similarly, the protective member 18 is also attached to the upper end of the side wall and the outer surface of the rubber ring socket 24. The method of mounting (wrapping and fixing) the protective material 18 may be any method as long as it can surely protect the portion without ribs. For example, a string, an adhesive tape, an adhesive, or the like may be used for fixing. In manufacturing the pipe member 10, first, the manhole body 12, the plain short pipe 38, the inflow portion 14 with ribs, the outflow portion 16 with ribs, and an appropriate number of protective materials 1 are provided.
Prepare 8 mag each. For example, when manufacturing the manhole body 12, a ready-made manhole is prepared. Since the inflow port 20 of the ready-made manhole is generally formed as a rubber ring receiving port, the enlarged diameter receiving port 20a is formed by cutting and removing the tip portion from the rubber ring receiving portion. Plain short pipe 3
In the manufacture of 8, a plain short pipe of an appropriate length having the same inner diameter as the inlet 20 is prepared, and the outer diameter of the other end is substantially equal to the inner diameter of the enlarged diameter receiving port 20 a by, for example, blow molding. Expand the same. When manufacturing the ribbed inflow portion 14, a ribbed short tube of an appropriate length having the same inner diameter as the inflow port 20 and having an enlarged diameter receiving port 36 at one end and a spout formed at the other end is prepared. The other end is subjected to secondary processing, that is, for example, by heating and softening, inserting an appropriate mold, and cooling and curing, so that the inner diameter of the other end is increased to substantially the same as the outer diameter of the plain short tube 38. Let it. When manufacturing the outflow portion 16 with ribs, the rubber ring 4 having the same inner diameter as the outflow port 22 and having both ends made into a spigot,
A short pipe with a rib having an appropriate length attached to 6 is prepared, and one end is subjected to secondary processing so that the inner diameter at one end is increased to be substantially the same as the outer diameter of the outlet 22. Next, one end of the plain short pipe 38 is inserted into the other end of the ribbed inflow portion 14 to be bonded and bonded, and the other end of the plain short pipe 38 is inserted into the inflow port 20 of the manhole body 12. Adhesive bonding. On the other hand, the outflow port 22 of the manhole main body 12 is inserted into one end of the inflow section 16 with ribs, and is bonded and bonded. An appropriate number of protective members 18 are provided so as to cover the entire outer surface of the manhole body 12 without ribs, that is, the side walls, the inlet 20, the outlet 22, and the rubber ring receiving port 24. It is processed into a shape and size, and is wound around a portion without ribs, and an appropriate number of holding members 60
Fixed by. The method of manufacturing the fixing member 10 is not limited to the above-described one, and can be changed as appropriate. Referring to FIG. 5, when laying a sewer pipe using this pipe member 10, a groove 62 is cut in the ground 60, and the pipe member 10 is arranged in the groove 62. And
The spigot 44 of the ribbed outlet 16 is inserted into and connected to the enlarged diameter receiving port 50 of the ribbed pipe 48 at the end of the outflow conduit extending from the downstream manhole (not shown). On the other hand, the spigot 34 of the ribbed pipe 32 constituting the inflow conduit extending to the manhole (not shown) on the upstream side is inserted and connected to the enlarged diameter receiving port 36 of the ribbed inlet 14. Note that a rubber ring (not shown) is attached to the outlet 34. On the other hand, the lower end spigot of the rising pipe 52 extending to the ground surface (not shown) is inserted into the rubber ring receiving port 24 and connected. Thereafter, the groove 62 is backfilled to a predetermined depth using the crushed stone 58, and the rest is backfilled with soil 64. In the pipe member 10 buried in this way, the projections of the crushed stones 58 come into contact with the outer surface (skin layer 54) of the protective material 18, and the skin layer 54 prevents the crushed stones 58 from biting. The foam layer 56 reduces the concentrated load and impact acting from the protrusions of the crushed stone 58. Accordingly, there is no possibility that the manhole body 12 which is the portion without the rib is cracked or scratched. According to this embodiment, all the crushed stones can be backfilled with the crushed stones 58 as the backfill material for backfilling the portion without the ribs (the manhole body 12). Backfill material (crushed stone,
There is no need to prepare sand and it is not necessary to distinguish where these backfills are used. Therefore, the workability can be dramatically improved. In addition, the ready-made product is provided with the ribbed inflow portion 14 and the ribbed outflow portion 16 which can be connected to the ribbed tube, and the ribless portion only needs to be protected by the protective material 18, so that the ribless portion is doubled. There is no need to develop a structure, to form a rib, or to develop a complicated mold to form an integrally molded product with all ribs, so that it can be manufactured at low cost. Further, by installing the protective material 18 in advance, the work time can be shortened because the protective material 18 does not need to be installed at the construction site. In addition, quality control of the mounting state of the protection member 18 can be performed, and variation in quality due to on-site work can be prevented. The manhole body 12 is not limited to the one shown in the above embodiment, but may be of any shape. For example, a plurality of inlets 20 and outlets 22 may be formed respectively. In addition, the inlet 20 is formed with an enlarged diameter receiving port 20a obtained by cutting off the end of the rubber ring receiving port, but the inlet 20 may be, for example, a port. In this case, the inner diameter of the other end of the ribbed inflow port 14 is increased to be substantially the same as the outer diameter of the inflow port (slot) without the interposition of the plain short pipe 38, and is directly bonded to the inflow port 20. Join. In each of the above embodiments, the protective member 18
Indicates that the protective material 18 is composed of two layers, that is, a skin layer 54 and a foam layer 56. However, the protective material 18 is not limited to this. For example, three layers such as the skin layer 54, the foam layer 56, and the skin layer 54 may be used. May be laminated. As shown in FIG. 6A, a plurality of cuts 18a may be formed in the protective member 18 to form cuts 18b. In this case, the notch 1
By overlapping the layers 8b with each other, the degree of winding can be adjusted, so that wrinkling of the protective member 18 can be prevented, and mounting on the portion without ribs becomes appropriate and easy. The shape and the like of the cut portion 18b can be changed as appropriate, and may be, for example, a substantially triangular shape, a substantially trapezoidal shape, or the like as shown in FIGS. 6 (B) and 6 (C). Further, as shown in FIG. 7A, the protective member 18 has a hole 18c through which one of the openings (the inlet 20 or the outlet 22) provided in the manhole body 12 is inserted. It may be formed. In such a case, each protection member 18 is attached to each opening of the manhole body 12, and each protection member 18 is attached to the outer surface of the manhole body 12 so as to cover the same. The manhole 40
The shape, the numerical aperture, and the like of the manhole body 12 are not limited to those shown in FIG. And so on. Further, instead of the hole 18c, a radial cut 18d as shown in FIG. 7B may be formed in the protective material 18. Further, for example, a protective material 18 as shown in FIG. 7C can be used. The protection member 18 includes a first protection part 18e for covering the bottom of the manhole body 12, and a plurality of second protection parts 1 extending radially from the first protection part 18e.
8f, and the side wall of the manhole body 12 is covered by the second protection portion 18f. In this case, the outer surfaces of the inflow port 20 and the outflow port 22 provided to protrude from the side wall are protected by using another protective material 18. In each of the above-described embodiments, the entire outer surface of the manhole body 12, that is, the entire non-rib portion is covered with the protective material 18. However, the non-rib portion for mounting the protective material 18 is required. It is not necessary to include all the portions without ribs, and not all of the portions without ribs. That is,
If a vertical load is not applied even when contacting the crushed stone 58, there is no danger of catastrophic damage occurring to the ribless portion. Therefore, the protective material 18 is attached to such a ribless portion where no vertical load is applied. You don't have to. For example, in the case of the pipe member 10 of the embodiment of FIG. 1, the protection member 18 does not have to be attached to the outer surface of the rubber ring socket 24 to which the rising pipe 52 is connected. In each of the above embodiments, the pipe member 10
Is a manhole, but the pipe member 10 whose rib-free portion is protected by the protective material 18 is not limited to a specific pipe member (pipe structure), and any pipe member may be used. Can be applied. For example, the conduit member 10 may be a universal joint as shown in FIG. The conduit member 10 of another embodiment shown in FIG.
It is a universal joint that is buried in the ground where there is a risk of liquefaction and is therefore backfilled with crushed stone. The conduit member 10 includes a universal joint body 70 and a ribbed inflow portion 14 for connecting the universal joint body 70 to a ribbed pipe.
And a protective material 18 for protecting the ribbed outlet 16 and the ribless part. In the pipe member 10 of the other embodiment, the inflow portion with ribs 14, the outflow portion with ribs 16, the plain short pipe 38, the protection member 18 and the like are the same as those in the above-described embodiment of FIG. Therefore, the description of the overlapping portions, the manufacturing method, the construction method, and the like will be omitted. The universal joint body 70 is for connecting the two pipes to each other so that the connection angle can be changed.
The first connection part 72 and the second connection part 74 are included. The first connection portion 72 and the second connection portion 74 are butted on an inclined surface S inclined at a predetermined angle with respect to each axis, and the connection angle is changed by rotating the two. In addition,
This universal joint body 10 is also similar to the case of FIG.
It can be manufactured from a ready-made universal joint made of a synthetic resin such as vinyl chloride. The first connecting portion 72 has a predetermined inner diameter, and has an enlarged diameter receiving port 76 formed at one end and a spigot 78 formed at the other end. The enlarged-diameter receiving port 76 is formed, for example, by cutting off a distal end portion of a rubber ring receiving port. A rubber ring mounting groove 80, a locking flange 82, and a rattling preventing flange 8 are formed on the outer surface of the end of the spigot 78 from the end surface side.
4 are formed. The rubber ring mounting groove 80 has a first connecting portion 72.
A rubber ring 86 that seals a joint between the second connecting portion 74 and the second connecting portion 74 is mounted. Further, two handles 88 that are gripped when the connection angle is changed are provided on the outer surface of the enlarged diameter receiving port 76. The second connecting portion 74 has the same inner diameter as the first connecting portion 72, and has a receiving port 90 formed at one end and a spigot 92 formed at the other end. On the inner surface of the receiving port 90, a water stop surface 94 to which the rubber ring 86 contacts is formed.
A locking groove 96 to be engaged with the outer peripheral edge of the locking flange 82 is formed on the inner surface of the end. At a predetermined position on the outer surface of the second connection portion 74, two handles 98 that are gripped when changing the connection angle are provided. In the universal joint body 70, the spigot 78 of the first connecting portion 72 is inserted into the socket 90 of the second connecting portion 74, and the locking flange 82 formed in the spigot 78 and the socket 90 are connected. The formed locking groove 96 is fitted. And
The enlarged diameter receiving port 76 and the spigot 92 are provided with a ribbed inflow portion 14 and a ribbed outflow portion 16, respectively, so as to be connectable to a ribbed tube (not shown). In the pipe member 10, the inflow portion 14 with ribs is provided.
Straight section 30, plain short pipe 38 and outflow section 1 with ribs
6 includes a first connecting portion 72 and a second connecting portion 7.
4, and the other end of the plain short tube 38 has an outer diameter substantially the same as the inner diameter of the enlarged diameter receiving port 76 so as to fit the enlarged diameter receiving port 76 of the first connection portion 72. The diameter is expanded. Then, the protection member 18 is appropriately mounted so as to cover the portion without ribs, that is, the entire outer surface of the universal joint body 70. Specifically, the first connecting portion 72 and the second
Separate protective members 18 are attached to the connection portions 74 by the holding members 60, respectively. First connection part 72 and second connection part 74
For example, at the joining portion of the first connecting portion 7
On the protection member 18 of 2), the protection member 18 of the other (second connection portion 74) is stacked. Also, holes are formed in each of the protective members 18 corresponding to the handles 88 and 98, respectively, so that the handles 88 and 98 project outside the protective member 18. In this manner, the first connecting portion 72 and the second connecting portion 7 are stacked in a state where the separate protective members 18 are overlapped at the joint portion.
4 are individually covered with separate protective members 18, so that the conduit member 10 can be connected to the first connecting portion 7 with the protective members 18 attached.
2 and the second connecting portion 74 can be rotated relative to each other,
The connection angle can be changed. According to the other embodiment, as the backfill material for backfilling the portion without the rib (the universal joint body 70), all the crushed stones can be backfilled by using the crushed stones 58, and the workability can be improved. The universal joint body 70 is not limited to the one shown in the above-described embodiment (the embodiment in FIG. 8), but may be of any shape. Also, in the conduit member 10 of the other embodiment, as the protective member 18, for example, a member formed in three layers or the modified example shown in FIG. Needless to say, I get it. The pipe member 10 may be, for example, a ribbed pipe (branched pipe) having a ribless branch joint, a ribless branch joint, or a square.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an illustrative view showing one embodiment of the present invention; FIG. 2 is an enlarged schematic view of a rib-inflow portion side of the embodiment of FIG. 1; FIG. 3 is an enlarged illustrative view of the rib-equipped outlet portion side of the embodiment in FIG. FIG. 4 is an illustrative view showing a protective material; FIG. 5 is an illustrative view showing a use state of the embodiment in FIG. 1; FIG. 6 is an illustrative view showing a modified example of the protective material; FIG. 7 is an illustrative view showing a modified example of the protection member; FIG. 8 is an illustrative view showing another embodiment of the present invention; FIG. 9 is an illustrative view showing a conventional technique; [Description of Signs] 10 ... pipe member 12 ... manhole body 14 ... inflow section 16 with ribs ... outflow section 18 with ribs ... protective materials 32, 48 ... pipes 58 with ribs ... crushed stone 70 ... universal joint body

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Claims (1)

1. A pipe member having a ribbed portion and a ribless portion, wherein the ribless portion is provided with a protective material.