JP2012188840A - Inner subpipe joint and manhole or basin using the joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inner subpipe joint which can be applicable to a plurality of manholes or basins having different sizes.SOLUTION: An inner subpipe joint 10 having a joint body 12 is attached to an inner wall 102 of a manhole 100 so as to prevent a bottom surface 108 of the manhole 100 from being abraded or damaged by the fall of inflowing sewage water from a high place and to prevent scattering of the sewage water. The joint body 12 is formed of a flexible synthetic resin and includes a sewage water receiving part 14 which receives the sewage water flowing from an inflow pipe 104 and a vertical pipe part 16 for connecting an inner subpipe 120. The sewage water receiving part 14 comprises a first pipe wall 18 which is disposed adjacent to the wall surface side of the manhole 100 and a second pipe wall 20 disposed adjacent to the center of the manhole 100, and has a funnel shape with an upper opening. The flexible first pipe wall 18 can be deformed along the inner wall surface of a plurality of manholes having different sizes.

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inner / sub pipe joint, and a manhole or dredging using the inner / sub pipe joint, and more particularly, to an inner / sub pipe fitting attached to an inner wall surface of a combined sewer and a manhole or dredging using the same. .

  An example of a conventional inner / sub pipe joint is disclosed in Patent Documents 1 and 2.

  In the technique of Patent Document 1, the wall surface (that is, the body wall surface) of the main body of the inner sub-pipe joint is curved with the same curvature as the curvature of the side wall of the manhole, and the outer surface of the body wall is along the inner surface (that is, the inner wall surface) of the side wall. It is formed as follows. When attaching the inner / sub pipe joint to the manhole, the inner sub pipe joint is fitted into the manhole by inserting and fastening the anchor bolt into the insertion hole of the main body wall while keeping the main body wall along the inner wall of the manhole. Fix it.

In the technique of Patent Document 2, a spacer is disposed between an inner peripheral wall surface (inner wall surface) of a manhole and a saddle portion fixed to the inner wall surface of the manhole according to the size of the manhole. . One surface of the spacer is formed into a curved surface substantially equal to the curved surface of the inner wall surface of the manhole, and the other surface is formed into a curved surface substantially equal to the curved surface of the saddle portion of the sub-joint body in the manhole.
JP2007-100410 [E03F 5/02] Patent 3825775 [E02D 29/12]

  However, since the curvature of the inner wall surface varies depending on the size of the manhole, the technique of Patent Document 1 requires the preparation of an inner / sub pipe joint having a different curvature of the body mounting surface according to the size of the manhole. The number of alignment points increases, and the cost increases accordingly.

  On the other hand, in the technique of Patent Document 2, by selecting a spacer according to the size of the manhole, even if the size of the manhole is different, it is possible to use the same sub-joint body in the manhole. The number of parts increases by the amount of the spacer. In other words, the technique of Patent Document 2 has a problem that the workability is inferior because the attachment work of the sub-joint body in the manhole becomes complicated due to the large number of parts.

  Therefore, the main object of the present invention is to provide a novel inner / sub pipe joint, and a manhole or rod using the same.

  Another object of the present invention is to provide an inner sub-joint that can reduce the cost and can be attached to an inner wall surface of a manhole or a rod with a simple construction, and a manhole or a rod using the same.

  The present invention employs the following configuration in order to solve the above problems. Note that reference numerals in parentheses, supplementary explanations, and the like indicate correspondence relationships with embodiments described later to help understanding of the present invention, and do not limit the present invention in any way.

  The first invention is an inner sub-joint that is attached to the inner wall surface in a state along the inner wall surface of the manhole or ridge, and is made of a synthetic resin, and at least the attachment surface disposed on the inner wall surface side is flexible. It is an inner sub pipe joint provided with the joint main part which has the property, and the attachment part provided in a joint main body, and attaching a joint main body to an inner wall surface.

  In the first invention, the inner sub pipe joint (10) includes a joint body (12), for example, inner wall surfaces (102, 152, 162, 172, 枡, manholes (100, 150, 160, 170, 180)). 182). The joint body is made of a synthetic resin and includes a sewage receiving part (14) that receives sewage and a standing pipe part (16) that connects the inner sub pipe (120). A sewer receiving part contains the 1st pipe wall (18) used as the attachment surface to the inner wall surface of a manhole or a ridge. The first tube wall has flexibility, and can be deformed along a plurality of manholes having different sizes and the inner wall surface of the bag. That is, when attaching the inner sub pipe joint to the inner wall surface of the manhole or the trough, the first pipe wall of the sewage receiving portion is bent and deformed so as to match the curvature of the inner wall surface so as to follow the inner wall surface. The joint body is provided with an attachment portion (32) for fixing the inner sub pipe joint to the inner wall surface. For example, the attachment portion is formed with an insertion hole (34) for inserting an anchor bolt (114) when the inner sub pipe joint is attached.

  According to the first invention, the joint surface of the joint main body is bent and deformed so as to be along the inner wall surface of the manhole or ridge, so that it is common to a plurality of manholes or ridge inner wall surfaces having different sizes. It is possible to reduce the type of product and the amount of inventory.

  Furthermore, since the number of parts can be reduced, it is easy to attach to manholes and ridges, and the workability is excellent.

  A second invention is dependent on the first invention, and the mounting surface is in a range between a maximum curvature and a minimum curvature of a plurality of manholes or different inner wall surfaces having different sizes based on predetermined conditions. It is formed in a curved plate shape that can be bent and deformed.

  In the second invention, the first pipe wall (18), which is the attachment surface to the inner wall surface (102, 152, 162, 172, 182) of the ridge or manhole (100, 150, 160, 170, 180) Based on the above conditions, a plurality of manholes having different sizes, or a curved plate shape that can be bent and deformed in a range between the maximum curvature and the minimum curvature of the inner wall surface of the bag.

  3rd invention is dependent on 1st or 2nd invention, and is further provided with the reinforcement part formed integrally or separately with a coupling main body, and reinforcing the back surface of a coupling main body.

  In the third invention, the sewage receiving portion (14) of the joint main body (12) includes a first pipe wall (18) serving as a mounting surface of the joint main body, and a second pipe wall connecting both side ends of the first pipe wall ( 20), and the second pipe wall is provided with a reinforcing portion (30). For example, the reinforcing portion is formed in a band shape from a metal such as steel, soft iron, or stainless steel, and is embedded over the entire length along the bending direction of the second tube wall.

  According to 3rd invention, the load to the back surface of a coupling main body by the sewage etc. which flow in from an inflow pipe can be reduced.

  A fourth invention is a manhole or a gutter according to any one of the first to third inventions, in which the inner sub pipe joint of the first or second invention is constructed.

  In the fourth aspect of the invention, the first pipe wall (18) of the joint body (12) extends along the inner wall surface (102, 152, 162, 172, 182) of the flange or manhole (100, 150, 160, 170, 180). To bend and deform. Then, for example, the inner sub-joint (10) is positioned at a predetermined position so that the upper center portion of the first pipe wall is at a position lower than the pipe bottom (116) of the inflow pipe (104) by a predetermined dimension. Then, for example, by tightening the anchor bolt (110) inserted through the insertion hole (28) of the first tube wall and tightening the anchor bolt (114) inserted through the insertion hole (34) of the attachment portion (32), Fix the inner / sub pipe joint to the inner wall of the manhole or ridge. And an inner sub pipe (120,122) is connected to an inner sub pipe joint, and the sewer pipe which guides sewage to an outflow pipe (106) is formed.

  The fifth invention is dependent on the fourth invention, and a cover member for covering the attachment portion from above is interposed between the attachment portion and the inner wall surface.

  In the fifth invention, the anchor bolt (114) inserted through the insertion hole (34) of the attachment portion (32) of the inner sub-joint joint (10) is used, for example, as a hook or manhole (100, 150, 160, 170, 180). When the inner wall surface (102, 152, 162, 172, 182) is tightened, the cover member (126) is interposed between the attachment portion and the inner wall surface. The cover member includes a rubber cover part (128) formed of, for example, synthetic rubber, and an insertion hole (132) for inserting an anchor bolt is formed at one end of the rubber cover part. When mounting the cover member, for example, the cover member is arranged with the insertion hole facing downward, and the anchor bolt inserted through the insertion hole of the mounting portion is further inserted into the insertion hole of the cover member, Tighten to. Then, the rubber cover portion is folded toward the center of the manhole, and the anchor bolt and the attachment portion of the inner sub pipe joint are covered from above by the rubber cover portion.

  According to the fifth invention, it is possible to prevent dust and the like contained in the sewage from adhering to and accumulating in anchor gaps and gaps formed between the attachment parts of the inner and sub pipe joints and the inner wall surfaces of the manholes and ridges. Workers can easily maintain and manage manholes.

  According to this invention, since it can be applied to manholes and rivets of different sizes with one inner sub-joint, the cost can be reduced. In addition, since the number of parts of the inner / sub pipe joint can be reduced, the mounting work to the manhole and the rod becomes easy and the workability is excellent.

  The above object, 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.

It is a schematic sectional drawing which shows the state which attached the inner sub pipe coupling which is one Example of this invention in the manhole. It is a front view which shows the inner sub-joint of FIG. It is a rear view which shows the inner sub-joint of FIG. It is a side view which shows the inner sub-joint of FIG. It is a top view which shows the inner sub-joint of FIG. FIG. 2 is a partially enlarged rear view showing a state in which the inner sub pipe joint of FIG. 1 is mounted in a manhole. (A) is sectional drawing which shows the cross section of the inner / sub pipe joint in the VII (a) -VII (a) line of FIG. 5, (b) is the VII (b) -VII (b) line of FIG. It is sectional drawing which shows the cross section of the inner sub pipe joint. (A) is a top view which shows the attachment part of the inner secondary pipe joint of FIG. 1, (b) is a front view which shows the attachment part of the inner secondary pipe joint of FIG. It is an illustration figure which shows typically the state which attached the inner sub-joint of FIG. 1 in the manhole. FIG. 10 is an illustrative view schematically showing a state in which the inner / sub pipe joint of FIG. 1 is installed in a manhole having a size different from that of FIG. 9. FIG. 10 is an illustrative view schematically showing a state in which the inner sub pipe joint is mounted in a bag having a size different from that of FIG. 9. FIG. 2 is a partially enlarged rear view showing a state in which the inner sub-pipe joint of FIG. 1 is mounted in a manhole through a cover member. It is a front view which shows the inner sub-joint of another Example of this invention. It is a rear view which shows the inner sub-joint of FIG. It is a side view which shows the inner sub-joint of FIG. It is a top view which shows the inner sub-joint of FIG. FIG. 14 is an illustrative view schematically showing a state where the inner sub-joint of FIG. 13 is mounted in a manhole. FIG. 18 is an illustrative view schematically showing a state where the inner sub-joint of FIG. 13 is installed in a manhole having a size different from that of FIG. 17.

  With reference to FIG. 1, an inner sub pipe joint 10 according to an embodiment of the present invention includes a joint body 12, for example, on the inner wall surface 102 in a state along the inner wall surface 102 of a manhole 100 of a combined sewer. It is attached. Then, by receiving the sewage flowing in from the inflow pipe 104 and guiding it to the outflow pipe 106, wear and damage of the bottom surface 108 of the manhole 100 and the scattering of the sewage due to the inflowing sewage falling from a high place are prevented.

  1 is, for example, a manhole having an inner diameter of 900 mm, and the diameter of the inflow pipe 104 is, for example, 600 mm.

  As shown in FIGS. 2 to 5, the joint body 12 is made of a synthetic resin. Specifically, the joint main body 12 is made of a flexible synthetic resin such as polyethylene containing FRP (fiber reinforced plastic) or polypropylene. It is formed. In this embodiment, the joint body 12 is formed by FRP and includes a sewage receiving portion 14 and a standing pipe portion 16.

  The sewage receiving portion 14 is a portion that serves as a receiving frame that receives sewage flowing from the inflow pipe 104. The sewage receiving portion 14 includes a first tube wall 18 and a second tube wall that are integrally formed, and is formed in a funnel shape having an upper opening that gradually decreases in diameter from the upper end 22 toward the lower end 24.

  The first tube wall 18 is disposed on the inner wall surface 102 side of the manhole 100 and serves as an “attachment surface” of the joint body 12. The first tube wall 18 is formed in a curved plate shape that curves with a curvature similar to the curvature of the inner wall surface 102 of the manhole 100, and the radius of curvature is, for example, 450 mm. However, since the first tube wall 18 has flexibility, as will be described in detail later, the first tube wall 18 can be bent and deformed along the inner wall surfaces of a plurality of manholes having different sizes (sizes).

  A packing material 26 is attached to the outer surface of the first tube wall 18. As the packing material 26, a resin foam made of EPDM (for example, “Opsealer” manufactured by Sanwa Kako Co., Ltd.) or the like can be used.

  An insertion hole 28 is formed in the first tube wall 18 and the packing material 26 at a position lower than the central portion of the upper end of the first tube wall 18 by a predetermined dimension, for example, 90 mm. The anchor bolt 110 is inserted into the insertion hole 28 when the inner sub pipe joint 10 is attached. The reason why the insertion hole 28 is lowered by a predetermined dimension from the center of the upper end of the first tube wall 18 is that the anchor bolt 110 inserted into the insertion hole 28 and the anchor bolt 110 are stably fixed as shown in FIG. This is because the space around the anchor bolt 110 necessary for the above-described operation (the range indicated by the oblique lines in FIG. 6) is positioned outside the filler 112 such as mortar filled around the inflow pipe 104.

  2 to 5, the second tube wall 20 is disposed on the center side of the manhole 100, connects both side ends of the first tube wall 18 in a U-shaped cross section, and connects the “back surface” of the joint body 12. Become. The first pipe wall 18 and the second pipe wall 20 form the sewage receiving portion 14 in a substantially elliptical shape that is long in the width direction and short in the depth direction in plan view from above. In this embodiment, the length in the width direction of the upper end 22 of the sewage receiving portion 14 is, for example, 400 mm, and the length in the depth direction of the upper end 22 of the sewage receiving portion 14 is, for example, 290 mm.

  The second tube wall 20 is provided with a reinforcing portion 30 for reinforcing the back surface of the joint body 12. The reinforcing portion 30 is formed in a long and narrow band shape by a metal such as steel, soft iron, and stainless steel, and the entire length of the reinforcing portion 30 is extended along the bending direction of the second tube wall 20 so as to connect the mounting portions 32, which will be described in detail later. Provided. Although not shown in the drawings, the reinforcing portion 30 is formed by joining two steel bars spaced apart by a predetermined distance in the vertical direction up and down by welding with auxiliary steel bars at regular intervals, as shown in FIG. Embedded in the second tube wall 20. However, it should be noted that in FIG. 7, the reinforcing portion 30 is simply illustrated in a rectangular shape.

  2-5, the attachment part 32 is provided in the both ends of the 2nd pipe wall 20, respectively. The attachment portion 32 is a portion for fixing the inner sub pipe joint 10 to the manhole 100, and is formed of a metal such as stainless steel.

  As shown in FIG. 8, the attachment portion 32 includes a first plate portion 32a, a second plate portion 32b, and a fixing portion 32c, and is fixed to the outer surface of the reinforcing portion 30 by welding or the like. The first plate portion 32a and the second plate portion 32b are formed in a substantially square shape in plan view from above. Specifically, the first plate portion 32 a is formed in a rectangular plate shape extending in the depth direction, and is embedded in the second tube wall 20 together with the reinforcing portion 30. The second plate portion 32b is continuously formed by bending from one end in the depth direction of the first plate portion 32a to the outside in the width direction (that is, the side opposite to the joint body 12). It extends toward the direction substantially equal to the bending direction of the first tube wall 18 on the outside. An insertion hole 34 is formed in the second plate portion 32b. The fixing portion 32c is a portion for fixing the first plate portion 32a and the second plate portion 32b to the outer surface of the reinforcing portion 30, and is on the inner side in the width direction of the first plate portion 32a (that is, on the joint body 12 side). It is formed in a plate shape along the surface, and is embedded in the second tube wall 20 together with the first plate portion 32 a and the reinforcing portion 30. Both end portions in the depth direction of the fixing portion 32c have a shape that rises inward, and the leading end surface of the rising portion is formed in an inclined shape along the second tube wall 20, and the reinforcing portion 30 is formed by welding or the like. It is fixed to the outer surface.

  The anchor bolt 114 is inserted into the insertion hole 34 of the second plate portion 32b when the inner sub pipe joint 10 is attached. Here, the insertion hole 34 (that is, the attachment portion 32) of the second plate portion 32b is formed at a position lower than the upper end 22 of the sewage receiving portion 14 by a predetermined dimension, for example, 35-40 mm. The reason why the insertion hole 34 is lowered by a predetermined dimension from the upper end 22 of the sewage receiving portion 14 is that the anchor bolt 114 inserted into the insertion hole 34 and the anchor bolt 114 are stably fixed in the same manner as the insertion hole 28 described above. This is because the space around the anchor bolts 114 (range shown by hatching in FIG. 6) necessary for the positioning is positioned outside the filler 112 such as mortar filled around the inflow pipe 104.

  2 to 5, the standing pipe portion 16 is formed at the lower end 24 of the sewage receiving portion 14. The upright tube portion 16 is a portion connecting the straight tubular inner / sub tube 120. In this embodiment, the vertical tube portion 16 is formed in a short tube cylindrical shape (short tube) extending in the vertical direction, and has a diameter of, for example, 200 mm.

  2 to 5, in order to manufacture such an inner sub pipe joint 10, first, a joint body 12 is formed by FRP. Then, after fixing the attachment portions 32 (fixed portions 32c thereof) to both side ends of the reinforcement portion 30 by welding or the like, the reinforcement portions 30 are attached to the outer surface of the second pipe wall 20 of the sewage receiving portion 14. Next, using a roller or a brush, the same synthetic resin as the synthetic resin in which the joint body 12 is molded, in this embodiment, FRP is laminated in a range extending from the reinforcing portion 30 and the surrounding second tube wall 20. To do. When the synthetic resin is solidified, the inner sub pipe joint 10 in which the reinforcing part 30 is integrally embedded in the second pipe wall 20 of the sewage receiving part 14 (that is, the back surface of the joint body 12) is obtained.

  With reference to FIG. 1 and FIG. 9, the installation method which attaches the inner sub pipe joint 10 to the manhole 100 is demonstrated below. As described above, the manhole 100 shown in FIG. 9A is a manhole having an inner diameter of 900 mm, for example.

  When attaching the inner sub pipe joint 10 to the manhole 100, first, the attachment position is determined with reference to the pipe bottom 116 of the inflow pipe 104.

  Specifically, as shown in FIG. 9B, the first pipe wall 18 (that is, the attachment surface of the joint body 12) of the sewage receiving portion 14 is placed along the inner wall surface 102 of the manhole 100 while the first pipe. The center of the upper end of the wall 18 is positioned so as to be a predetermined dimension lower than the tube bottom 116 of the inflow tube 104. The predetermined height difference between the center of the upper end of the first pipe wall 18 and the pipe bottom 116 of the inflow pipe 104 is the flow rate and flow velocity of the sewage flowing through the inflow pipe 104 and the length of the upper end 20 of the sewage receiving part 12 in the depth direction. In this embodiment, the center of the upper end of the first pipe wall 18 is positioned so as to be lowered by 100 mm from the pipe bottom 116 of the inflow pipe 104.

  Then, the anchor bolt 110 is inserted into the insertion hole 28 of the first tube wall 18, the anchor bolt 110 is tightened to the inner wall surface 102 of the manhole 100, and the anchor bolt 114 is inserted into the insertion hole 34 of the attachment portion 32. The inner sub pipe joint 10 is fixed to the inner wall surface 102 of the manhole 100 by fastening the anchor bolt 114 to the inner wall surface 102 of the manhole 100 via the adjusting member 118. At this time, the packing material 26 is pressure-bonded by the inner wall surface 102 of the manhole 100 and the outer surface of the sewage receiving portion 14, and the water stoppage of this portion is maintained. The adjustment member 118 is a rubber bush or the like, and basically, a member having a size corresponding to the distance between the mounting portion 32 of the inner sub-joint joint 10 and the inner wall surface 102 of the manhole 100 is used. This adjustment member 118 does not increase the number of parts because it can be used in common for a plurality of different manholes and baskets.

  When the mounting operation of the inner sub pipe joint 10 is completed, the inner sub pipes 120 and 122 are connected to the inner sub pipe joint 10 to form a sewage pipe that guides the sewage to the outflow pipe 106. Specifically, a straight tubular inner sub pipe 120 is joined to the standing pipe portion 16 of the inner sub pipe joint 10, and an elbow-shaped inner sub pipe 122 is joined to the straight tubular inner sub pipe 120, and then fixed. The vertical pipe portion 16 of the inner sub pipe joint 10 and the straight tubular inner sub pipe 120 are appropriately fixed to the inner wall surface 102 of the manhole 100 by the metal fitting 124, and the operation is completed.

  In the manhole 100 to which the inner / sub pipe joint 10 is attached in this manner, when a normal amount of sewage flows from the inflow pipe 104 in fine weather, the sewage enters the inner / sub pipe joint 10 from the upper opening of the sewage receiving portion 14. Inflow. Then, it smoothly flows in the sewage receiving portion 14 formed in a funnel shape, and flows out from the outflow pipe 106 through the straight and elbow inner sub-pipes 120 and 122. Thereby, erosion and damage to the bottom surface 108 of the manhole 100 due to the sewage flowing in from the inflow pipe 104 being struck against the bottom surface 108 of the manhole 100 can be suppressed. In addition, since the sewage can be prevented from being scattered by the inner sub-joint 10, the workability of the operator who performs maintenance and management in the manhole 100 at the time of fine weather is improved.

  On the other hand, when it rains, the flow rate and flow velocity of the sewage increase, so the sewage jumps out of the inflow pipe 104, but the upper end 22 of the sewage receiving portion 14 is lowered by a predetermined dimension from the pipe bottom 116 of the inflow pipe 104. Jumps directly over the inner secondary pipe joint 10 and directly into the manhole 100. That is, sewage in rainy weather that exceeds the planned maximum flow rate in fine weather does not collide with the pipe wall of the inner sub-joint joint 10 (such as the second pipe wall 20 of the sewage receiving portion 14) so much, and therefore, due to the load of sewage in the rain Damage to the inner / sub pipe joint 10 is prevented.

  Furthermore, since the joint main body 12 has flexibility, the inner sub pipe joint 10 has not only the manhole 100 having the same degree of curvature as the curvature of its own mounting surface as described above, but also itself. It can be attached to a manhole having a smaller curvature than that of the mounting surface (that is, having a large radius of curvature).

  Hereinafter, an example of a method of installing the inner sub pipe joint 10 in the manhole 150 having an inner diameter of 1800 mm shown in FIG.

  First, while the first pipe wall 18 of the sewage receiving portion 14 is deformed so as to follow the inner wall surface 152 of the manhole 150, the upper center portion of the first pipe wall 18 is connected to the inflow pipe 104 in the same manner as described above. Positioning is performed so that a predetermined dimension is lowered from the tube bottom 116.

  At this time, since the curvature of the first pipe wall 18 of the sewage receiving portion 14 (that is, the attachment surface of the joint body 12) is larger than the curvature of the inner wall surface 152 of the manhole 150, as shown in FIG. The one wall 18 is bent and deformed so as to match the curvature of the inner wall surface 152 of the manhole 150, so that the one tube wall 18 extends along the inner wall surface 152 of the manhole 150.

  Then, the anchor bolt 110 is inserted into the insertion hole 28 of the first tube wall 18, the anchor bolt 110 is tightened to the inner wall surface 152 of the manhole 150, and the anchor bolt 114 is inserted into the insertion hole 34 of the attachment portion 32. Then, the inner sub pipe joint 10 is fixed to the inner wall surface 152 of the manhole 150 by tightening the anchor bolt 114 to the inner wall surface 152 of the manhole 150 via the adjusting member 118 such as a rubber bush.

  As described above, in this embodiment, since the joint main body 12 has flexibility, the attachment surface of the joint main body 12 is bent and deformed so as to match the curvature of the inner wall surface of the manhole. Can be along. Therefore, it is possible to attach the common inner / sub pipe joint 10 not only to the manhole having the same degree of curvature as the attachment surface of the joint body 12 but also to the inner wall surfaces of a plurality of manholes having different sizes. That is, according to this embodiment, the cost can be reduced by reducing the types of products and the amount of inventory.

  Furthermore, since the attachment surface of the joint body 12 of the inner sub pipe joint 10 is bent and deformed so as to follow the inner wall surface of the manhole, a spacer corresponding to the size of the manhole is provided as in the technique of Patent Document 2. It requires fewer parts than selecting and converting the curvature. That is, according to this embodiment, since the number of parts is small, the work of attaching the inner / sub pipe joint 10 to the manhole is facilitated, so that the workability is excellent.

  In this embodiment, the reinforcing portion 30 is provided on the back surface of the joint body 12. Here, when the joint main body 12 is manufactured by FRP, the joint main body 12 becomes weak with respect to the load of the direction which causes delamination (namely, tensile direction) on the material. In particular, since the back surface of the joint body 12 is not fixed to the inner wall surface of the manhole, it is easy to receive a load in the tensile direction due to sewage flowing from the inflow pipe 104. However, according to this embodiment, since the reinforcing portion 30 is provided on the back surface of the joint body 12, the load in the tensile direction due to the sewage flowing from the inflow pipe 104 is applied to the back surface of the joint body 12. The burden on the back surface of the joint main body 12 can be reduced by the reinforcement part 30 paying.

  Further, since the reinforcing portion 30 is provided on the back surface of the joint body 12, the load generated on the back surface when the attachment surface of the joint body 12 is bent and deformed so as to match the curvature of the inner wall surface of the manhole is reduced to the second tube wall 20. It is possible to reduce the load on the back surface of the joint body 12 by dispersing it in the entire bending direction.

  Therefore, according to this embodiment, the performance degradation of the inner sub-pipe joint 10 can be reduced.

  In the above-described embodiment, the inner sub-pipe joint 10 has a smaller curvature than the manhole 100 having the same degree of curvature as the curvature of the fitting surface of the joint body 12 or the fitting surface of the joint body 12 (that is, the curvature). Although it is attached to the manhole 150 having a large radius, it is needless to say that such an inner / sub pipe joint 10 can also be applied to a manhole having a larger curvature (that is, a smaller radius of curvature) than the attachment surface of its own joint body 12. Yes. In short, the mounting surface of the joint body 12 is a predetermined number of manholes or rods of different sizes, which are predetermined based on predetermined conditions such as the size of the joint body 12 and the type of flexible material forming the joint body 12. It can be bent and deformed in a range between the maximum curvature and the minimum curvature of the wall surface. Of course, the present invention can be applied not only to manholes for combined sewers, but also to manholes for split sewers, drainage dredging, and the like.

  Hereinafter, an example of a method of installing the inner sub pipe joint 10 in the manhole 160 having an inner diameter of 600 mm shown in FIG.

  First, while the first pipe wall 18 of the sewage receiving part 14 is deformed so as to be along the inner wall surface 162 of the manhole 160, the upper center part of the first pipe wall 18 is connected to the inflow pipe 104 in the same manner as described above. Positioning is performed so that a predetermined dimension is lowered from the tube bottom 116.

  At this time, since the curvature of the first pipe wall 18 of the sewage receiving portion 14 (that is, the attachment surface of the joint body 12) is smaller than the curvature of the inner wall surface 162 of the manhole 160, as shown in FIG. The one wall 18 is bent and deformed so as to match the curvature of the inner wall surface 162 of the manhole 160, thereby being aligned with the inner wall surface 162 of the manhole 160.

  Then, the anchor bolt 110 is inserted into the insertion hole 28 of the first tube wall 18, the anchor bolt 110 is fastened to the inner wall surface 162 of the manhole 160, and the insertion hole 34 (of the second plate portion 32 b) of the attachment portion 32. The anchor bolt 114 is inserted into the inner wall pipe 162 and the anchor bolt 114 is fastened to the inner wall surface 162 of the manhole 160 via an adjustment member 118 such as a rubber bush, thereby fixing the inner sub pipe joint 10 to the inner wall surface 162 of the manhole 160. .

  Furthermore, in the above-described embodiment, the second pipe wall 20 includes the reinforcing portion 30 formed by welding two steel bars spaced apart at a predetermined interval in the vertical direction by welding auxiliary steel bars at regular intervals and connecting them vertically. It is not necessary to be limited to this. The shape of the reinforcing portion 30 is not particularly limited as long as the back surface of the joint body 12 can be reinforced over the entire length in the bending direction. For example, a single steel bar may be embedded in the second tube wall 20 as the reinforcing portion 30. In addition, the reinforcing portion 30 is not necessarily embedded in the second tube wall 20, and the reinforcing portion 30 may be fixed so as to be exposed on the outer surface of the second tube wall 20 by adhesion or fusion.

  Moreover, in the above-mentioned Example, although the separate attaching part 32 was fixed to the both ends of the reinforcement part 30 by welding etc., it does not need to be limited to this. The reinforcing portion 30 and the attachment portion 32 may be integrally formed. For example, both side ends of the reinforcing portion 30 may be projected in a plate shape extending with a curvature that is the same as or slightly larger than that of the first tube wall 18, and the portions may be used as the attachment portions 32.

  Furthermore, in the above-described embodiment, the reinforcing portion 30 is formed separately from the joint main body 12 using a metal such as steel or soft iron. However, the reinforcing portion 30 is not necessarily limited to this, and the reinforcing portion 30 is integrated with the joint main body 12. You may make it form. For example, although illustration is omitted, when the joint body 12 is formed, a rib is formed over the entire length along the bending direction of the second tube wall 20 so that the rib functions as the reinforcing portion 30. It may be. Also in this case, both side ends of the rib may be projected in a plate shape extending with a curvature that is the same as or slightly larger than that of the first tube wall 18, and that portion may be used as the attachment portion 32.

  In the above-described embodiment, the first plate portion 32a and the second plate portion 32b formed in a substantially square shape are fixed to the outer surface side of the reinforcing portion 30 via the fixing portion 32c by welding or the like. There is no need to be done. For example, although illustration is omitted, the attachment portion 32 is formed in a substantially square shape by the first plate portion 32a and the second plate portion 32b without forming the fixing portion 32c in the attachment portion 32, and the first plate portion. You may make it fix 32a to the inner surface side and the outer surface side of the reinforcement part 30 by welding etc. FIG.

  Furthermore, in the above-described embodiment, by inserting the anchor bolt 114 into the insertion hole 34 of the second plate portion 32b of the attachment portion 32 and tightening the inner wall surface of the manhole or rod, the joint body 12 is attached to the inner wall surface of the manhole or rod. However, if the joint body 12 can be attached to the inner wall surface of the manhole or rod, it is not always necessary to insert the anchor bolt through the attachment portion 32 and tighten it to the inner wall surface of the manhole or rod. The shape of the part 32 is not particularly limited.

  Furthermore, you may make it provide the some reinforcement part 30 and the attaching part 32 in the up-down direction of the coupling main body 12. FIG.

  Further, in the above-described embodiment, the insertion hole 28 for inserting the anchor bolt 110 is formed at a position that is lower than the central portion of the upper end of the first tube wall 18 by a predetermined dimension, and further than the upper end 22 of the sewage receiving portion 14. An insertion hole 34 for allowing the anchor bolt 114 to be inserted into the attachment portion 32 provided at a position that is lowered by a predetermined dimension was formed.

  However, these height differences are provided so as not to cause problems such as the anchor bolts 110 and 114 not being fixed to the inner wall surface of the manhole. It is not always necessary to form the insertion hole 28 at a position lower than the center of the upper end of the first tube wall 18 by a predetermined dimension. Further, it is not always necessary to form the insertion hole 34 at a position lower than the upper end 22 of the sewage receiving portion 14 by a predetermined dimension.

  In short, conditions such as the shape of the joint main body 12, the diameter of the inflow pipe 104, the thickness of the filler 112, the predetermined dimension of the height difference between the upper center portion of the first pipe wall 18 and the pipe bottom 116 of the inflow pipe 104, etc. In consideration of the above, the formation positions of the insertion holes 28 and 34 may be appropriately determined.

  Further, in the above-described embodiment, when the inner sub pipe joint 10 is fixed to the inner wall surface 102 of the manhole 100, the anchor bolt 114 inserted into the insertion hole 34 of the mounting portion 32 is inserted into the manhole 100 via the adjustment member 118. Although tightened to the wall surface 102, it is not necessary to limit to this. For example, when the attachment portion 32 is formed of metal, the anchor bolt 114 is not necessarily interposed via the adjustment member 118 if the second plate portion 32b of the attachment portion 32 is plastically deformed along the inner wall surface of the manhole or the collar. Therefore, it is not necessary to tighten the inner wall surface 102 of the manhole 100. Further, when the attachment portion 32 is formed of a flexible synthetic resin, the anchor bolt 114 is not necessarily required if the second plate portion 32b of the attachment portion 32 is bent and deformed along the inner wall surface of the manhole or the collar. There is no need to fasten to the inner wall surface 102 of the manhole 100 via the adjusting member 118.

  Furthermore, the cover member 126 may be interposed between the attachment portion 34 of the inner sub-pipe joint 10 and the inner wall surface of the manhole.

  As shown in FIG. 12, the cover member 126 has dust or the like contained in the sewage flowing in from the inflow pipe 104 between the anchor bolt 114, the mounting portion 32 of the inner / sub pipe joint 10, and the inner wall surface 102 of the manhole 100. This is for preventing adhesion and accumulation in the generated gap, and includes a rubber cover portion 128 and a fixing portion 130 for fixing the rubber cover portion 128 to the anchor bolt. The rubber cover portion 128 is formed in a rectangular plate shape from a synthetic rubber such as SBR (styrene butadiene rubber) or NBR (acrylonitrile butadiene rubber). The fixing portion 130 is formed in a plate shape using a material such as stainless steel or synthetic resin, and is attached to one end of the rubber cover portion 128. The rubber cover portion 128 and the fixing portion 130 are formed with insertion holes 132 through which the anchor bolts 114 are inserted.

  When attaching such a cover member 126 to the anchor bolt 114, as shown in FIG. 12 (a), the cover member 126 is arranged so that its fixing portion 130 is at the bottom. The anchor bolt 114 inserted through the insertion hole 34 of the attachment portion 32 is inserted into the insertion hole 132 of the fixing portion 130, and the anchor bolt 114 is further tightened to the inner wall surface 102 of the manhole 100 via the adjustment member 118. Then, as shown in FIG. 12B, the rubber cover portion 128 of the cover member 126 is folded toward the center of the manhole 100, and the anchor bolt 114 and the attachment portion 32 of the inner auxiliary pipe joint 10 are moved from above by the rubber cover portion 128. cover. By doing so, dust or the like contained in the sewage flowing in from the inflow pipe 104 flows on the surface of the rubber cover portion 128 and flows out from the outflow pipe 106, so that the operator can easily maintain and manage the manhole. Will be able to do.

  Here, the case where the inner sub pipe joint 10 is attached to the inner wall surface 102 of the manhole 100 shown in FIG. 9A has been described, but the manhole 150 shown in FIG. 10A and the manhole shown in FIG. The same applies to 160.

  Further, when the rubber cover portion 128 of the cover member 126 is formed so that the end portion on the fixed portion 130 side becomes thin, the anchor bolt 114 and the attachment portion 32 of the inner sub-joint 10 are moved from above by the rubber cover portion 128. When covering, the rubber cover portion 128 is easily folded into the center of the manhole 100, which is preferable.

  Furthermore, in the above-described embodiment, the vertical tube portion 16 of the joint body 12 is formed in a short tube cylindrical shape (short tube) extending in the vertical direction, and the diameter thereof is set to 200 mm, for example, but is not limited thereto. There is no need to The upright pipe portion 16 may have an outlet structure or a receiving structure, and the size thereof may be appropriately set according to the size of the inflow pipe.

  For example, the inner / sub pipe joint 10, which is another embodiment of the present invention shown in FIGS. 13 to 18, is different in size from the inner / sub pipe joint 10 in the embodiment of FIG. 1. Hereinafter, the same reference numerals are used for the same parts as the inner / sub pipe joint 10 shown in FIG. 1, and the description thereof is omitted or simplified.

  As shown in FIG. 13, the inner sub pipe joint 10 includes a joint body 12 and is attached to the inner wall surface 172 in a state of being along the inner wall surface 172 of a manhole 170 of a combined sewer, for example. The manhole 170 shown in FIG. 13A is a manhole having an inner diameter of 1200 mm, for example, and the tube diameter of the inflow pipe is 1000 mm, for example.

  As shown in FIGS. 14 to 17, the sewage receiving portion 14 of the joint body 12 is formed in a funnel shape having an upper opening that gradually decreases in diameter from the upper end 22 toward the lower end 24. A tube wall 20 is included. The first tube wall 18 is curved with a curvature similar to the curvature of the inner wall surface 172 of the manhole 170. In this embodiment, the radius of curvature of the first tube wall 18 is, for example, 600 mm. A packing material 26 is attached to the outer surface of the first tube wall 18. Further, the first pipe wall 18 and the packing material 26 are formed with insertion holes 28 for inserting the anchor bolts 110 when the inner sub pipe joint 10 is attached. The insertion hole 28 is formed at a position lower than the central portion of the upper end of the first tube wall 18 by a predetermined dimension, for example, 130 mm.

  And the 2nd pipe wall 20 is formed so that the both ends of the 1st pipe wall 18 may be tied in a cross-sectional U shape. By the first tube wall 18 and the second tube wall 20, the sewage receiving portion 14 is formed in a substantially elliptical shape that is long in the width direction and short in the depth direction in plan view from above. For example, the length in the width direction of the upper end 22 of the sewage receiving unit 14 is, for example, 660 mm, and the length in the depth direction of the upper end 22 of the sewage receiving unit 14 is, for example, 360 mm.

  The second pipe wall 20 is provided with a reinforcing portion 30. The reinforcing portion 30 is formed in a band shape or a rod shape with a metal such as steel, soft iron or stainless steel or a synthetic resin, and is provided along the curved direction of the second tube wall 20.

  And the attachment part 32 for fixing the inner / sub pipe joint 10 to the manhole 170 is provided in the both ends of the reinforcement part 30, respectively. In this embodiment, the insertion hole 34 of the attachment portion 32 is provided at a position lower than the upper end 22 of the sewage receiving portion 14 by a predetermined dimension, for example, 35-40 mm.

  Further, a standing pipe portion 16 is formed at the lower end 24 of the sewage receiving portion 14. The vertical tube portion 16 is a portion that connects the straight tubular inner and secondary pipes 112, and in this embodiment, is formed in a short tube cylindrical shape (short tube shape) extending in the vertical direction. The inner diameter of the vertical tube portion 16 is, for example, 250 mm.

  When such an inner / sub pipe joint 10 is attached to the manhole 170, as shown in FIG. 13, the first pipe wall 18 of the sewage receiving portion 14 (that is, the attachment surface of the joint body 12) is provided inside the manhole 170. Since it has the same degree of curvature as the wall surface 172, the upper central portion of the first tube wall 18 is in the same manner as described above while keeping the first tube wall 18 along the inner wall surface 172 of the manhole 170. The inflow pipe 104 is positioned so as to be a predetermined dimension, for example, 100 mm lower than the pipe bottom 116.

  Furthermore, since the joint main body 12 has flexibility, the inner sub pipe joint 10 has not only the manhole 100 having the same degree of curvature as the curvature of its own mounting surface as described above, but also itself. It can be attached to a manhole having a curvature smaller than that of the mounting surface, and a manhole having a curvature larger than its own mounting surface.

  For example, as shown in FIG. 18, when the manhole is a manhole 180 having an inner diameter of 1800 mm, the first pipe wall 18 of the sewage receiving portion 14 has a larger curvature than the inner wall surface 182 of the manhole 180. While the first tube wall 18 is deformed so as to be along the inner wall surface 182 of the manhole 180, the center of the upper end of the first tube wall 18 has a predetermined dimension from the tube bottom 116 of the inflow tube 104 in the same manner as described above. For example, the positioning may be performed so that the position is lowered by 100 mm.

  Thus, in this embodiment as well, as in the embodiment of FIG. 1, it is possible to attach the common inner / sub pipe joint 10 to the inner wall surfaces of a plurality of manholes having different sizes. Can be reduced. In addition, since the number of parts is small, it is easy to attach the inner / sub pipe joint 10 to the inner wall surface of the manhole, so that the workability is excellent.

  In each of the above-described embodiments, the sewage receiving portion 14 is formed in a substantially elliptical shape that is long in the width direction and short in the depth direction in plan view. However, it is not limited to this, The sewage receiving part 14 may be circular shape in planar view, and polygonal shape including square shape may be sufficient as it.

  In each of the above-described embodiments, the joint body 12 is formed by FRP (fiber reinforced plastic). However, the present invention is not limited to this, and injection molding and rotational molding using other synthetic resins such as polyethylene and polypropylene. The joint body 12 may be molded by a method such as blow molding.

  Furthermore, it is not always necessary to form the entire joint body 12 with a flexible synthetic resin such as polyethylene or polypropylene containing FRP. If at least the attachment surface of the joint body 12 disposed on the inner wall surface side is formed of a synthetic resin having flexibility (that is, if the attachment surface of the joint body 12 is flexible), the others The material of this part is not particularly limited. For example, the attachment surface and the back surface of the joint body 12 may be formed of different synthetic resins.

  Furthermore, the specific numerical values such as the diameter and height described above are merely examples, and can be appropriately changed as necessary.

DESCRIPTION OF SYMBOLS 10 ... Inner / sub pipe joint 12 ... Joint main body 18 ... 1st pipe wall 20 ... 2nd pipe wall 28, 34 ... Insertion hole 30 ... Reinforcement part 32 ... Mounting part 100 ... Manhole 102 ... Inner wall surface 114 ... Anchor bolt 128 ... Cover Element

Claims (5)

An inner sub-joint that is attached to the inner wall surface in a state along the inner wall surface of the manhole or ridge
A joint body made of a synthetic resin and having at least a mounting surface arranged on the inner wall surface side having flexibility, and provided with the joint body, and having a mounting portion for mounting the joint body to the inner wall surface, Secondary pipe joint.   The mounting surface is formed in a curved plate shape that can be bent and deformed in a range between a maximum curvature and a minimum curvature of inner walls of a plurality of manholes or rods having different predetermined sizes based on a predetermined condition. Item 1. An inner sub-joint according to item 1.   The inner / sub pipe joint according to claim 1, further comprising a reinforcing portion that is formed integrally with or separately from the joint body and reinforces a back surface of the joint body.   A manhole or scissors in which the inner sub-pipe joint according to any one of claims 1 to 3 is constructed.   The manhole or ridge according to claim 4, wherein a cover member that covers the attachment portion from above is interposed between the attachment portion and the inner wall surface.

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