JP6400948B2 - Mounting tube opening structure - Google Patents

Description

  The present invention relates to a structure of an opening portion with respect to an inner peripheral surface (wall surface) of a main pipe of a mounting pipe connected to a main pipe of a sewer pipe, for example.

  Many pipes such as sewer pipes, water pipes or agricultural water pipes are laid in the ground. These pipes are generally constituted by continuous cylindrical pipes such as concrete pipes and synthetic resin pipes or square pipes having a square cross section. Further, an attachment pipe (branch pipe) through which water flows in or out is connected to these cylindrical pipe and square pipe. Therefore, when the pipe is constituted by a cylindrical pipe, the mounting pipe is opened on the curved wall surface of the cylindrical pipe, and when the pipe is constituted by a square pipe, the mounting pipe is a plane of the square pipe. Open to the wall.

  For example, as shown in FIG. 6A, when the attachment pipe 52 is connected to the main pipe 51 constituting the sewer pipe, an attachment hole 51a is formed in the main pipe 51, and the attachment pipe 52 is formed in the hole 51a. Is connected through. And when the attachment pipe 52 is connected to the hole 51 a formed in the main pipe 51, the outer peripheral surface of the attachment pipe 52 and the main pipe 51 are prevented from entering the main pipe 51 from the connection portion 53. The gap with the formed hole 51a is stopped. Therefore, normally, groundwater does not permeate from the connection part of the attachment pipe to the main pipe.

  However, there is no problem even if the structure is as described above. For example, in the case of a sewer pipe, the connection portion 53 between the main pipe 51 and the mounting pipe 52 is affected by the influence of an earthquake or ground subsidence. There is a risk that a crack will occur in the water stop portion or the pipe itself, and groundwater may enter the main pipe 51 from the crack.

  For example, the main pipe 51 of the sewer pipe or the attachment pipe 52 connected to the main pipe 51 is deteriorated due to deterioration of the inner peripheral surface, deterioration of the connection part 53 or deterioration of each pipe itself over time. The groundwater may infiltrate from. In such a case, as shown in FIG. 6 (b), it is common to rehabilitate the lining material 54 laid on the inner peripheral surface of the main pipe 51 or the mounting pipe 52.

  However, although the lining material 54 repairs the inner peripheral surface of the main pipe 51 and the mounting pipe 52, the main pipe 51 and the mounting pipe 52 themselves, and the connection portion 53 of both pipes on the outer peripheral surface side of the lining material 54 are not. Maintain a degraded state. For this reason, there is a possibility that groundwater may enter the main pipe 51 through the gap between the lining material 54 and the pipes 51 and 52.

  In particular, in the case of sewer pipes, there is a problem that the burden on the final disposal site is increased by the ingress of groundwater into the main pipe. Moreover, the surrounding earth and sand also infiltrate into the main pipe together with the groundwater, and as a result, a problem arises that a cavity is formed around the pipe and causes the road surface to collapse.

  The objective of this invention is providing the opening part structure of the attachment pipe which can prevent permeation of groundwater from the connection site | part of the attachment pipe with respect to the main pipe to a main pipe.

In order to solve the above problems, an opening structure of a mounting pipe according to the present invention is a structure of an opening of a mounting pipe that opens on a curved wall surface or a flat wall surface, and has a curved wall surface or a planar surface structure. A flange member formed in a shape corresponding to a wall surface including a wall surface, and a boss that protrudes from the flange and is inserted into a mounting pipe that opens to the wall surface to circulate water, and the flange member The boss constituting the boss has elasticity, and the boss in a compressed state of the outer boss is inserted into the mounting tube that opens to the wall surface, and the outer peripheral surface is held in a compressed state. And a flange provided with a water blocking material on the surface in contact with the wall surface and in contact with the wall surface, thereby shielding a gap formed between the wall surface and the wall surface. .

In the opening structure of the mounting pipe , the water stop material provided on the surface that contacts the wall surface of the flange constituting the flange member is a water-swellable water stop material that swells by the action of water. preferable.

In any one of the attachment pipe opening structures described above, it is preferable that a ring-shaped protrusion is formed on a surface of the flange constituting the flange member that contacts the wall surface .

Moreover, the opening part structure of the other attachment pipe which concerns on this invention is a structure of the opening part of the attachment pipe opened to a curved-surface wall surface or a planar wall surface, Comprising: A curved-surface wall surface or a planar wall surface is included. A flange member formed in a shape corresponding to the wall surface, and a boss that protrudes from the flange and is inserted into a mounting pipe that opens to the wall surface and circulates water, and constitutes the flange member A protrusion is formed on the inner peripheral surface of the boss, and has an outer diameter smaller than the inner diameter of the mounting tube that opens in the wall surface, and allows deformation of the boss in the radial direction along the axial direction. A plurality of slits are formed, and after the boss is inserted into the mounting tube, a cylindrical diameter-expanding member is inserted and brought into pressure contact with the protrusion, so that the boss is expanded in diameter. Water-stopping material on the surface that is in pressure contact with the peripheral surface and in contact with the wall surface A flange provided in contact with the wall surface is intended to shield a gap formed between the wall surface.

In the opening configuration of the superscript Quito tube, it is preferable that the outer peripheral surface of the boss constituting the flange member projecting in contact with the inner peripheral surface of the mounting tube is formed.

  In any one of the above-described opening structures of the attachment pipe, it is preferable that the slit formed in the boss constituting the flange member is filled with a water stop material.

  In any one of the opening structures described above, the water stop material provided on the surface of the flange constituting the flange member that contacts the wall surface is a water-swellable water stop material that swells due to the action of water. It is preferable.

  Furthermore, in any one of the above-described opening structures of the attachment pipe, it is preferable that a ring-shaped protrusion is formed on a surface that contacts the wall surface of the flange constituting the flange member.

  In the opening structure of the attachment pipe according to the present invention, the boss of the flange member is inserted into the attachment pipe and the flange is brought into contact with the wall surface so as to shield the gap between the wall surface, thereby connecting the attachment pipe to the wall. Alternatively, it is possible to prevent water from penetrating from the deteriorated portion of the mounting pipe. In particular, since the flange is formed in a shape corresponding to a curved wall surface or a flat wall surface, the present invention can be applied even if the member having the wall surface is a cylindrical tube or a square tube.

  In addition, the outer peripheral surface of the boss has elasticity, and the boss in a compressed state of the outer peripheral surface is inserted into the mounting tube, and the outer peripheral surface is maintained in a compressed state and is in contact with the inner peripheral surface of the mounting tube. By making it, the attachment state with respect to the attachment pipe of a flange member can be self-held. Moreover, since the water stop material is provided on the surface that contacts the wall surface of the flange, the flange can be brought into contact with the wall surface to shield the gap formed between the wall surface and stop the water.

  In addition, the boss has an outer diameter smaller than the inner diameter of the mounting tube, and a plurality of slits for allowing the boss to deform in the radial direction along the axial direction can be easily formed in the radial direction. Can be realized. For this reason, after inserting the boss into the mounting tube, the cylindrical diametric member is press-fitted to increase the diameter of the boss and press-contact with the inner peripheral surface of the mounting tube, so that the flange member can be attached to the mounting tube by itself. Can be held. Moreover, since the water stop material is provided on the surface that contacts the wall surface of the flange, the flange can be brought into contact with the wall surface to shield the gap formed between the wall surface and stop the water.

  Also, by forming a protrusion on the inner peripheral surface of the boss, after inserting the boss into the mounting tube, a cylindrical diameter-expanding member is inserted and brought into pressure contact with the protrusion to expand the diameter of the boss. And can be brought into pressure contact with the inner peripheral surface of the mounting pipe. For this reason, the diameter of the boss can be expanded and the mounting state of the flange member with respect to the mounting tube can be self-held.

  In addition, by forming a protrusion in contact with the inner peripheral surface of the mounting pipe on the outer peripheral surface of the boss, the protrusion can be intensively pressed against the inner peripheral surface of the mounting pipe when the diameter of the boss is increased.

  Further, by filling the slit formed in the boss with a water-stopping material, water flowing in the attachment pipe does not enter the opposite surface side through the slit of the boss.

  In addition, by using a water-swellable water-swelling material that swells due to the action of water, the water-stopping material provided on the surface in contact with the wall surface of the flange penetrated when water penetrated from the degraded part of the mounting pipe to the wall surface side. The water stop material swells due to the action of water. For this reason, the clearance gap between a flange and a wall surface can be shielded reliably, and permeation of water can be prevented.

  Furthermore, by forming a ring-shaped protrusion on the surface that contacts the wall surface of the flange, when the flange is brought into contact with the wall surface, the protrusion can be reliably brought into contact with the wall surface to shield the gap. In particular, when a swellable water-stopping material is provided on the flange, the swollen water-stopping material can reliably shield the gap with the wall surface by the protrusion, and can surely prevent water from entering.

It is a figure which illustrates typically the opening part structure of the attachment pipe which concerns on 1st Example, and when an attachment pipe opens to a cylindrical pipe, sectional drawing along the pipe axis of this cylindrical pipe, an attachment pipe is a square pipe or It is sectional drawing in the case of opening to a retaining wall. (A) is sectional drawing of the direction orthogonal to the tube axis | shaft of a cylindrical tube when an attachment pipe opens to a cylindrical tube, (b) is sectional drawing when an attachment pipe opens to a square tube or a retaining wall. It is a figure explaining the flange member used for the opening part structure of the attachment pipe which concerns on 1st Example. It is a figure which illustrates typically the opening part structure of the attachment pipe which concerns on 2nd Example. It is a figure explaining the flange member used for the opening part structure of the attachment pipe which concerns on 2nd Example. It is a figure explaining a subject while explaining a prior art.

  Hereinafter, the opening structure of the attachment pipe according to the present invention will be described. In the opening structure according to the present invention, an attachment pipe or a branch pipe connected to a main pipe such as a sewer pipe, a water pipe or an agricultural water pipe is an inner peripheral surface of the main pipe (hereinafter also referred to as “wall surface”). It is related with the structure of the site | part opened in. In particular, even if groundwater enters from the connecting portion of the main pipe and the attachment pipe, it is possible to prevent the penetration of the groundwater into the main pipe.

  In the present invention, the curved wall surface and the planar wall surface are the shapes of the other wall surfaces where the attachment pipe opens, and do not limit the overall shape of the member having these wall surfaces. For example, as a member having a curved wall surface, there is a cylindrical pipe typified by a concrete pipe, but a pipe whose part (for example, bottom and sides) is square and part (ceiling surface) is curved. It may be. Similarly, as a member having a planar wall surface, there is a square tube typified by a box culvert, but it may be a tube in which a part of the above-mentioned part is a square and a part is a curved surface.

  In addition, “the flange is brought into contact with the wall surface and the gap formed between the wall surface and shielded” is not necessarily limited to the flange being in close contact with the wall surface and shielded. What is necessary is just to be able to shield the gap which may enter. Further, the flange is not limited to shielding the gap with the wall surface alone, and may be shielded by a water stop material provided on the flange.

  Further, the “attachment pipe” does not necessarily need to be a member having a different structure from a member (for example, a member such as a cylindrical tube or a square tube) constituting a curved wall surface or a planar wall surface. That is, when the main pipe and the branch pipe branched from the main pipe portion are integrally formed, the branch pipe also falls within the range of the attachment pipe.

  In this invention, in order to shield between a wall surface and an attachment pipe, the flange member which has a flange and a boss | hub is used. And while inserting the boss | hub of a flange member into an attachment pipe and making a flange contact a wall surface and shielding the clearance gap formed between wall surfaces, the penetration | invasion to the wall surface of groundwater is prevented. In particular, since the flange has a shape opposed to a curved wall surface or a flat wall surface, when the boss is inserted into the attachment tube, the flange can be brought into contact with the wall surface without any gap.

  Moreover, although the fixing method of the flange member which inserted the boss | hub into the attachment pipe | tube is not limited, It is preferable that it can hold | maintain and maintain an insertion state by the contact friction with respect to the internal peripheral surface of the attachment pipe | tube of a boss | hub. In particular, since water flowing through the attachment pipe flows inside the boss, a force from the flowing water acts on the boss. For this reason, it is necessary for the flange member to maintain the state of insertion into the attachment pipe against the force acting on the boss.

  When fixing the flange member in which the boss is inserted into the mounting tube, there is a method of bonding the outer peripheral surface of the boss and the inner peripheral surface of the mounting tube, or the wall surface and the surface facing the wall surface of the flange. There is also a method in which the outer diameter of the boss is formed slightly larger than the inner diameter of the mounting pipe, and the boss is press-fitted into the mounting pipe. Any of these methods can be employed.

  In particular, the flange member used in the opening structure of the mounting pipe according to the first embodiment described below is configured such that the outer peripheral surface of the boss has elasticity. In this flange member, the outer peripheral surface of the boss is inserted into the mounting tube in a compressed state, and the compressed state is maintained, so that the elastic force of the boss causes the inner peripheral surface of the mounting tube to be in pressure contact with the flange. Is possible.

  Moreover, the flange member used for the opening part structure of the attachment pipe which concerns on 2nd Example is comprised so that a deformation | transformation to radial direction may be permitted by forming a some slit in a boss | hub. In this flange member, a boss having a diameter smaller than the inner diameter of the mounting tube is inserted into the mounting tube, and then the diameter is increased so that the boss is pressed against the inner peripheral surface of the mounting tube and is self-held. It is possible.

  Although the outer diameter of the flange constituting the flange member is not particularly limited, it should be sufficiently larger than the diameter of the hole for attaching the mounting pipe formed in the main pipe when connecting the mounting pipe to the main pipe. is necessary. By bringing such a flange into contact with the inner peripheral surface of the main pipe, it is possible to shield the gap formed between the wall surface.

  Moreover, the water stop material provided in the surface which contacts the wall surface of a flange should just be what can hold | maintain water stop for a long term, and does not limit a material. However, when water permeates between the flange and the wall surface, it is preferably a swellable water stop material that swells due to the action of water. In the case of such a water-stopping material, since the boss of the flange member is not swelled when the boss of the flange member is inserted into the mounting pipe, the smooth operation can be realized without hindering the progress of the mounting operation. It becomes.

  And when water permeates from the deteriorated part of the mounting pipe, it reacts with the permeated water and swells to form a gap between the flange and the wall surface, and this gap can be shielded. . Therefore, when the wall surface is deteriorated and the surface is uneven, and a gap corresponding to the unevenness is formed between the flange and the flange, the gap can be reliably shielded. It becomes possible to ensure water stopping.

  In addition, the height of the ring-shaped protrusion formed on the surface that contacts the wall surface of the flange is not particularly limited, and when the boss is inserted into the mounting tube and the flange member is mounted, the top portion contacts the wall surface and the gap As long as the height can be shielded. Further, the diameter of the ring forming the protrusion is not particularly limited, but it is necessary to be larger than the diameter of the mounting hole formed in the main pipe in order to mount the mounting pipe.

  Next, the opening structure of the attachment pipe according to the first embodiment will be described with reference to FIG. 1, FIG. 2 (a), and FIG. In the present embodiment, the attachment pipe 2 is configured as an attachment pipe connected to the main pipe 1 constituting the sewer pipe. For this reason, the mounting pipe 2 opens to a curved wall surface, and the cross section in the pipe axis direction of the main pipe 1 is as shown in FIG. 1, and the cross section in the direction perpendicular to the pipe axis is shown in FIG. It becomes the figure which shows.

  In addition, as shown in FIG. 2B, when the mounting tube 2 is inserted into a mounting hole 9a formed in the square tube 9 and opens to a flat wall surface, a sectional view of the mounting tube opening structure. Is the same as FIG.

  In the figure, the main pipe 1 is configured as a cylindrical pipe made of a concrete pipe. The mounting pipe 2 connected to the main pipe 1 is also configured as a cylindrical pipe made of a concrete pipe or a synthetic resin pipe typified by vinyl chloride. A mounting hole 1a having a diameter corresponding to the outer diameter of the mounting pipe 2 is formed at a predetermined position of the main pipe 1, and the opening end 2a side of the mounting pipe 2 is inserted into the mounting hole 1a.

  Since the diameter of the mounting hole 1a formed in the main pipe 1 is slightly larger than the outer diameter of the mounting pipe 2, when the mounting pipe 2 is inserted into the mounting hole 1a, a gap 3 is formed between them. . The gap 3 has a very small size, but is greatly illustrated in each drawing in order to emphasize that it is a gap. However, even if the size is small, it is still a gap, and the size is sufficient for a water supply through which groundwater flows. For this reason, the gap 3 is filled with a filler 4 having a water-stopping property. With this filler 4, the attachment pipe 2 is attached to the main pipe 1 in a stable state, and the groundwater through the gap 3 with respect to the main pipe 1. Prevents the penetration of

  A flange member A is inserted into an opening end 2 a of the attachment pipe 2 with respect to the main pipe 1. As shown in FIG. 3, the flange member A includes a flange 11 formed in a shape corresponding to the shape of the inner peripheral surface of the main pipe 1, and a boss 12 projecting from the flange 11. Yes. In particular, the flange member A preferably has good handleability in consideration of working in the main pipe 1 of the sewer pipe. Therefore, the flange member A is made of a synthetic resin such as vinyl chloride or polyethylene.

  The flange 11 constituting the flange member A has an outer diameter sufficiently larger than the diameter of the mounting hole 1 a formed in the main pipe 1. In particular, the flange 11 is preferably formed with an advantageous outer diameter or thickness in order to contact the inner peripheral surface (wall surface) 1b of the main pipe 1 and shield the gap in order to prevent the penetration of groundwater.

  Further, the flange 11 has a shape corresponding to the shape of the wall surface where the attachment tube 2 opens. That is, as shown in FIG. 2 (a), when the mounting tube 2 opens on a curved wall surface, the flange 11 is formed in a curved surface similar to the curved surface of the wall surface, as shown in FIG. 2 (b). In addition, when the mounting tube 2 opens in a planar wall surface, the flange 11 is also formed in a planar shape.

  The flange member A is configured to shield a gap formed between the mounting tube 2 and the wall surface 1b when a contact surface 11a that is a surface that contacts the wall surface 1b of the flange 11 contacts the wall surface 1b. Yes. For example, when the wall surface 1b is an uneven surface caused by deterioration, there is a possibility that the gap cannot be reliably shielded even if the flat contact surface 11a contacts.

  For this reason, in this embodiment, a ring-shaped protrusion 11b is formed on the contact surface 11a of the flange 11. The protrusion 11b is configured as a rib formed continuously in a ring shape having a diameter larger than the diameter of the mounting hole 1a. The cross-sectional shape of the protrusion 11b is not particularly limited, and may be a triangle or a trapezoid, for example. In particular, even when the wall surface 1b is an uneven surface, when the flange member A is attached to the attachment tube 2, the top of the projection 11b can be deformed and shielded along the unevenness of the wall surface 1b.

  The outer peripheral surface of the boss 12 of the flange member A has elasticity. The elasticity of the outer peripheral surface of the boss 12 is preferably the degree necessary for self-holding when the flange member A is attached to the attachment pipe 2. For this reason, the boss 12 itself may be constituted by an elastic body, or may be constituted by coating or lining a material having elasticity on the outer peripheral surface by forming a core having sufficient rigidity.

  When the boss 12 itself is an elastic body, it can be configured using cork or rubber. The elasticity of the outer peripheral surface of the boss 12 is preferably such that the volume is reduced by the action of an external force, and a force is applied to the outside when the reduced volume returns to the original volume. Such materials include synthetic resin foams.

  Since the outer peripheral surface of the boss 12 has elasticity, the outer peripheral surface of the boss 12 comes into pressure contact with the inner peripheral surface of the mounting tube 2 when inserted into the mounting tube 2. Holding is possible. In addition, since the outer peripheral surface of the boss 12 is in pressure contact with the inner peripheral surface of the attachment tube 2, there is no gap between both surfaces, and it is possible to maintain water-stopping. Thus, in order to exhibit self-holding property or water-stopping property, the outer peripheral surface of the boss 12 is preferably formed of rubber, and more preferably water-swollen rubber that swells by the action of water.

  In this embodiment, the boss 12 constituting the flange member A is lined with an elastic body 12b made of water-swelling rubber having water-stopping property on the outer peripheral surface of the core member 12a formed together with the flange 11, and the outer surface in a free state. The diameter is configured to be larger than the inner diameter of the mounting tube 2. The outer diameter of the boss 12 in the free state is appropriately set according to conditions such as the inner diameter of the attachment tube 2 and the elasticity of the elastic body 12b.

  Further, since the boss 12 constituting the flange member A is inserted into the attachment tube 2, it is preferable to provide a tapered portion 12d on the outer peripheral surface on the free end side.

  The flange member A configured as described above forcibly reduces the diameter of the elastic body 12b provided on the boss 12 so that the outer diameter is smaller than the inner diameter of the mounting pipe 2, and in this state, the mounting pipe 2 extends from the opening end 2a. Inserted into. When the flange 11 comes into contact with the inner peripheral surface (wall surface) 1 b of the main pipe 1, the forced compression on the boss 12 is released, and the elastic body 12 b is pressed against the inner peripheral surface 2 b of the mounting pipe 2 accordingly. By doing so, the flange member A is self-held by the attachment pipe 2.

  Accordingly, the gap 3 formed between the inner peripheral surface of the mounting hole 1a formed in the main pipe 1 and the outer peripheral surface of the mounting pipe 2 is covered by the flange 11 of the flange member A, and the contact surface 11a is a wall surface. It will be shielded by contacting 1b. For this reason, even if a crack occurs in the filler 4 filled in the gap 3 due to an earthquake or ground subsidence, and groundwater penetrates into the gap 3 through the crack, it is possible to prevent the main pipe 1 from entering. is there.

  Further, when damage such as a crack occurs in the vicinity of the outer peripheral surface of the main pipe 1 of the mounting pipe 2 due to an earthquake, ground subsidence, or deterioration due to aging, the lining material 6 indicated by a two-dot chain line on the inner peripheral surface of the mounting pipe 2. Is laid and rehabilitated. In such a case, the damaged portion generated in the mounting pipe 2 exists as it is, and there is a possibility that the groundwater may permeate, and the permeated water passes through the gap 7 between the mounting pipe 2 and the lining material 6 and opens to the open end 2a. Flow in the direction.

  However, the open end 2a of the mounting tube 2 is covered by the flange 11 of the flange member A, and the contact surface 11a contacts the wall surface 1b, thereby shielding the gap formed between the wall surface 1b. . For this reason, the gap 7 is covered by the flange 11, and even if water permeates from the gap 7, it is possible to prevent the water from entering the main pipe 1.

  When inserting the flange member A into the attachment pipe 2, it is preferable to provide the water stop material 8 on the contact surface 11 a of the flange 11. As described above, since the outer peripheral surface 12c of the boss 12 is pressed against the inner peripheral surface 2b of the mounting tube 2 when the flange member A is inserted into the mounting tube 2, the flange member A is self-held. There is no gap between 2b. Further, since the elastic body 12b of the boss 12 is made of water-swollen rubber, it is not necessary to provide a water stop material on the outer peripheral surface 12c of the boss 12.

  For example, when water flowing through the mounting tube 2 acts between the outer peripheral surface 12c of the boss 12 and the inner peripheral surface 2b of the mounting tube 2, the water swelling rubber constituting the elastic body 12b swells and permeates the water. It becomes possible to prevent.

  The water stop material 8 is not limited as long as it can stop the permeated water. However, considering the ease of work when attaching the flange member A to the mounting tube 2 and securing the performance over time, the water-stopping material 8 has a water swelling property that swells due to the action of water. Is preferred. For example, the water-swelling water-stopping material that swells by the action of water includes a water-stopping material 8 made of water-swelling rubber and a water-stopping material 8 made of water-swelling felt obtained by compressing felt having water-swelling property. .

  The water-stopping material 8 made of water-swelling felt includes water-swelling fibers (for example, polyacrylic acid-based fibers) that swell under the action of water and non-swelling fibers (for example, polyethylene terephthalate-based fibers) that do not swell. It is comprised with the material mix | blended with the ratio set beforehand. And this water swelling felt is compressed rather than a normal state, is provided in the contact surface 11a of the flange 11 of the flange member A, and is used as the water stop material 8. FIG. For this reason, in the initial state in which the flange member A is attached to the attachment pipe 2, the water swelling felt constituting the water blocking material 8 has voids formed between the fibers. However, when water pressure is applied to the water-stopping material 8, the water-swelling fibers swell and fill the voids, thereby exhibiting high water-stopping properties.

  When providing a water stop material on the contact surface 11 a of the flange 11, it is preferable to use a water stop material 8 made of a water swelling felt so as to absorb irregularities generated on the inner peripheral surface 1 b of the main pipe 1. However, it is also possible to use the water stop material 8 made of water-swelling rubber on the contact surface 11a of the flange 11.

  As described above, by providing the water stop material 8 on the flange 11 constituting the flange member A, when the flange member A is inserted into the mounting pipe 2, the contact surface 11 a of the flange 11 and the inner peripheral surface of the main pipe 1. It becomes possible to form the water stop layer which consists of the water stop material 8 between 1b. In particular, the water blocking material 8 provided on the contact surface 11a of the flange 11 is also provided on the surface of the protrusion 11b.

  Further, when the ground water penetrates from the crack 7 generated in the filler 4 filled in the gap 3 of the mounting hole 1a or from the gap 7 between the mounting pipe 2 and the lining material 6, the contact of the flange 11 is caused by the action of the penetrated water. The water stop material 8 provided on the surface 11a and the protrusion 11b swells. The swollen water-stopping material 8 shields irregularities generated on the inner peripheral surface 1 b of the main pipe 1, and can surely prevent water from entering the main pipe 1.

  Next, the opening structure of the attachment pipe according to the second embodiment will be described with reference to FIGS. In the figure, the same reference numerals are given to the same portions as those in the above-described embodiment or the portions having the same functions, and the description thereof is omitted.

  As in the first embodiment described above, the flange member B is inserted into the open end 2a of the attachment pipe 2 with respect to the main pipe 1. As shown in FIG. 5, the flange member B includes a flange 16 formed in a shape corresponding to the shape of the inner peripheral surface of the main pipe 1 and a boss 17 projecting from the flange 16. Yes.

  A plurality of slits 18 are formed in the boss 17 constituting the flange member B, and the slit 18 is formed so that rigidity is lowered and deformation in the radial direction can be allowed. Although a plurality of slits 18 are formed in the longitudinal direction of the boss 17, each slit 18 is not formed to the free end of the boss 17 and the end portion on the flange 16 side. Further, the number and dimensions of the slits 18 are not limited, and are preferably set as appropriate according to conditions such as the raw material and thickness of the flange member B.

  The boss 17 configured as described above can be deformed in the radial direction. For this reason, the outer diameter of the boss 17 is made smaller than the inner diameter of the mounting tube 2, and after inserting into the mounting tube 2, it is possible to maintain the insertion state of the flange member B with respect to the mounting tube 2 by expanding the diameter. It is.

  That is, a plurality of protrusions 19a are formed on the inner peripheral surface 17a along the circumferential direction, a boss 17 having an outer diameter smaller than the inner diameter of the mounting tube 2 is formed, and the boss 17 has a pipe shape having an outer diameter larger than the inner diameter. The diameter-expanding member 20 is prepared. And the diameter expansion member 20 is inserted in the inside of the boss | hub 17, and this boss | hub 17 is diameter-expanded, the outer peripheral surface 17b is press-contacted to the internal peripheral surface 2b of the attachment pipe 2, and, thereby, the attachment pipe | tube of the flange member B 2 can be maintained.

  In particular, in this embodiment, a plurality of projections 19b are formed on the outer peripheral surface 17b of the boss 17 along the peripheral surface, thereby concentrating the force accompanying the diameter increase of the boss 17 on the projection 19b and effectively pressing. It is comprised so that a state may be implement | achieved.

  The protrusions 19a and 19b of the boss 17 are formed in a direction crossing the slit 18, and are formed at positions facing each other on the inner and outer peripheral surfaces 17a and 17b. For this reason, when the diameter of the boss 17 is increased by the diameter increasing member 20, the force acting on the protrusion 19a is directly transmitted to the protrusion 19b.

  The outer diameter of the protrusion 19b formed on the outer peripheral surface 17b of the boss 17 may be slightly larger than the inner diameter of the mounting tube 2, or may be approximately equal or smaller. That is, since the boss 17 allows deformation in the radial direction, even if the outer diameter of the protrusion 19b is slightly larger than the inner diameter of the mounting tube 2, the boss 17 can be inserted into the mounting tube 2 and It is possible to maintain the pressure contact state of the projection 19b with respect to the attachment tube 2 by inserting the. Therefore, by setting the thicknesses of the protrusions 19a and 19b and the outer diameter of the diameter-expanding member 20, the insertion state of the flange member B with respect to the attachment tube 2 can be favorably maintained.

  The slit 18 formed in the boss 17 is filled with a water stop material 21. The material of the water stop material 21 is not particularly limited. After the flange member B is inserted into the mounting pipe 2, water that enters the gap between the boss 17 and the mounting pipe 2 is prevented from penetrating into the flange 16 side. It is good if it is possible.

  As for the flange member B comprised as mentioned above, the boss | hub 17 is inserted in the attachment pipe 2 from the opening end 2a. Then, the flange 16 is brought into contact with the inner peripheral surface 1 b of the main pipe 1, and the diameter expanding member 20 is inserted into the boss 17 in this state. The inserted diameter-expanding member 20 comes into contact with the protrusion 19a of the boss 17 to expand the diameter of the boss 17, and the protrusion 19b presses against the inner peripheral surface 2b of the mounting tube 2 accordingly. Is held by the mounting tube 2.

  Accordingly, the gap 3 formed between the inner peripheral surface of the mounting hole 1a formed in the main pipe 1 and the outer peripheral surface of the mounting pipe 2 is the flange 16 of the flange member B, as in the first embodiment described above. It will be covered by. In addition, the gap formed between the inner peripheral surface 1b of the main pipe 1 and the flange 16 is shielded by the flange 16, in particular, the ring-shaped protrusion 16b formed on the contact surface 16a. For this reason, it prevents the penetration | invasion to the main pipe 1 from the crack which arose in the filler 4 with which the clearance gap 3 was filled, or the clearance gap which formed between the lining materials which renovated the inner peripheral surface of the attachment pipe 2 Is possible.

  In particular, when the flange material B is inserted into the attachment pipe 2, it is preferable to provide the water stop material 8 on the contact surface 16 a including the ring-shaped protrusion 16 b of the flange 16. By providing the water stop material 8 on the flange 16 that constitutes the flange member B, when the flange member B is inserted into the mounting pipe 2, the gap between the contact surface 16 a of the flange 16 and the inner peripheral surface 1 b of the main pipe 1. It becomes possible to form a water-stopping material layer. For this reason, even if groundwater penetrate | infiltrate from the crack part produced in the filler 4 with which the clearance gap 3 of the attachment hole 1a formed in the main pipe 1 was filled, and the clearance gap between the attachment pipe 2 and a lining material, it penetrate | infiltrated. It is possible to prevent water from entering the main pipe 1.

  The opening structure of the attachment pipe according to the present invention can be used as the structure of the opening of the attachment pipe connected to the pipe laid in the ground represented by the sewer pipe.

A, B Flange member 1 Main pipe 1a Mounting hole 1b Inner peripheral surface (wall surface)
2 Mounting pipe 2a Open end 2b Inner peripheral surface 3 Gap 4 Filling material 6 Lining material 7 Gap 8 Water stop material 9 Square pipe 9a Mounting hole 11, 16 Flange 11b Protrusion 12, 17 Boss 11a, 16a Contact surface 12a Core material 12b Elasticity Body 12c Outer peripheral surface 12d Tapered portion 17a Inner peripheral surface 17b Outer peripheral surface 18 Slit 19a, 19b Protrusion 20 Expanding member 21 Waterstop material

Claims (8)

It is a structure of an opening portion of a mounting pipe that opens on a curved wall surface or a flat wall surface,
A flange having a flange formed in a shape corresponding to a wall surface including a curved wall surface or a planar wall surface, and a boss that is inserted into a mounting pipe that protrudes from the flange and opens to the wall surface and distributes water. Having a member,
The outer peripheral surface of the boss constituting the flange member has elasticity, and the boss in a state in which the outer peripheral surface is compressed is inserted into the mounting tube opened in the wall surface and the outer peripheral surface is compressed. Is held in contact with the inner peripheral surface of the mounting pipe, and a flange provided with a water blocking material on the surface in contact with the wall surface is brought into contact with the wall surface to shield a gap formed between the wall surface. An opening structure of a mounting pipe characterized by the above. The mounting pipe according to claim 1, wherein the water stop material provided on the surface of the flange constituting the flange member that is in contact with the wall surface is a water swellable water stop material that swells by the action of water. Opening structure. The opening structure of an attachment pipe according to claim 1 or 2, wherein a ring-shaped protrusion is formed on a surface of the flange constituting the flange member that contacts the wall surface. It is a structure of an opening portion of a mounting pipe that opens on a curved wall surface or a flat wall surface,
A flange having a flange formed in a shape corresponding to a wall surface including a curved wall surface or a planar wall surface, and a boss that is inserted into a mounting pipe that protrudes from the flange and opens to the wall surface and distributes water. Having a member,
A protrusion is formed on the inner peripheral surface of the boss constituting the flange member, and has an outer diameter smaller than the inner diameter of the mounting pipe that opens in the wall surface, and extends in the radial direction of the boss along the axial direction. A plurality of slits for allowing deformation are formed, and after inserting the boss into the mounting tube, a cylindrical diameter-expanding member is inserted and brought into pressure contact with the protrusion, thereby expanding the diameter of the boss. And a flange formed with a water-stopping material on a surface that contacts the inner wall surface of the mounting pipe and that contacts the wall surface, and the gap formed between the wall surfaces is shielded. The opening structure of the mounting pipe. The mounting pipe opening structure according to claim 4 , wherein a protrusion that contacts the inner peripheral surface of the mounting pipe is formed on the outer peripheral surface of the boss constituting the flange member. The opening structure of the attachment pipe according to claim 4 or 5 , wherein a water stop material is filled in a slit formed in a boss constituting the flange member. Said flange member constituting flange water stopping material, wherein provided in the surface in contact with the wall surface of any of claims 4 to 6, characterized in that a water-swellable water stopping material which swells by the action of water The opening structure of the mounting pipe described in 2. 8. The attachment pipe opening structure according to claim 4 , wherein a ring-shaped protrusion is formed on a surface of the flange constituting the flange member that contacts the wall surface.

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