JP2011220413A - Method for connecting branch pipe for connecting branched pipe, and guide member for connecting branch pipe used for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for connecting a main pipe and a branch pipe for connecting a branched pipe using a guide member for connecting the branch pipe.SOLUTION: The guide member 65A for connecting the branch pipe is inwardly fitted in the pipe of the branch pipe 2 for connecting the branched pipe in advance, further one end of the guide member 65A for connecting the branch pipe is protruded from the pipe end 2A of the branch pipe 2 for connecting the branched pipe, a protrusion 66 protruded is able to inserted into an opening 3 for connecting the branched pipe of a sewer main pipe 1, the branch pipe 2 for connecting the branched pipe is arranged in the opening 3 for connecting the branched pipe while inserting the protrusion 66 of the guide member 65A for connecting the branch pipe into the opening 3 for connecting the branched pipe when connecting the branch pipe 2 for connecting the branched pipe to the opening 3 for connecting the branched pipe.

Description

  The present invention relates to a branch pipe connecting branch pipe connecting method for connecting a branch pipe connecting branch pipe to a main pipe, and a branch pipe connecting guide member used therefor.

  Conventionally, when a branch pipe connected to a public sewage and a sewage main pipe (main pipe) are connected, first, a branch pipe connecting branch pipe is connected to an opening provided on the peripheral surface of the sewage main pipe. Then, the branch pipe is connected to the sewage main pipe through the branch pipe connecting branch pipe (see, for example, Patent Document 1).

International Publication No. WO01 / 094834

  However, the configuration of Patent Document 1 has a problem that workability is poor when the branch pipe connection branch pipe is connected. Specifically, the branch pipe connecting branch pipe is usually heavy, and it takes a lot of labor for an operator to place the branch pipe connecting branch pipe at an appropriate position (perforation location) on the outer peripheral surface of the sewage main pipe while lifting the branch pipe connecting branch pipe. In addition, a curved saddle portion projecting sideways is provided at the bottom of the branch pipe connection branch pipe, so that the branch pipe connection opening is difficult to see from the operator during connection work. It takes much time to arrange the branch pipe connecting branch pipe at the position.

  Accordingly, the present invention is a method for connecting a branch pipe connecting branch pipe to a branch pipe connecting opening provided on the peripheral surface of the main pipe in order to solve the above-mentioned problem. A branch pipe connecting guide member is fitted into the pipe, and one end of the branch pipe connecting guide member is inserted from the pipe end to be connected to the main pipe in the branch pipe connecting branch pipe, and the inserted delivery section is inserted. Is set to a size and shape that can be inserted into the branch pipe connection opening of the main pipe, and when connecting the branch pipe connection branch pipe to the branch pipe connection opening of the main pipe, A branch pipe connecting branch pipe, wherein the branch pipe connecting branch pipe is disposed in the branch pipe connecting opening section of the main pipe while the feeding portion of the guide member is inserted into the branch pipe connecting opening section. A connection method is provided.

  In the above configuration, when the branch pipe connecting branch pipe is connected to the branch pipe connecting opening of the main pipe, the lower end portion (for example, the saddle portion) of the branch pipe connecting branch pipe is obstructed. Although it is difficult to work while visually checking the branch pipe connection opening, the branch pipe connection guide member inserted from the branch pipe connection branch is used as the branch pipe connection opening. By placing the branch pipe connecting branch pipe in the branch pipe connecting opening of the main pipe while being inserted, the branch pipe connecting branch pipe can be easily and quickly moved by the guiding action of the outlet portion. It is arranged at an appropriate position on the surface. For this reason, the work burden of the connecting work of the branch pipe connecting branch pipe is further reduced.

  The present invention is also a branch pipe connection guide member used in the above branch pipe connection branch connection method, wherein the branch pipe connection guide member is formed of a plate material, and the branch pipe connection guide member is the branch pipe connection. A branch pipe connecting guide member characterized in that the width direction of the branch pipe connecting guide member and the radial direction of the branch pipe connecting branch pipe coincide with each other in a state of being fitted in the branch pipe.

  By configuring the branch pipe connecting guide member with a plate material, the branch pipe connecting guide member has a simple structure, and can be easily inserted into the branch pipe connecting branch pipe.

  The branch pipe connection guide member is formed of a foldable plate, and the lateral width of the branch pipe connection guide member is smaller than the diameter of the branch pipe connection branch pipe in a state in which the branch pipe connection guide member is bent. When the bent branch connection guide member is in a state before being bent in the branch pipe connection branch pipe, the branch pipe connection guide member is fitted into the branch pipe connection branch pipe. It is good.

  In the above configuration, the branch pipe connection guide member is bent in advance into a dimension and shape that can be easily inserted into the branch pipe connection branch pipe, and the branch pipe connection guide member is inserted into the branch pipe connection branch pipe in the bent state. After that, the bent pipe connecting guide member in the bent state is opened to return to the original shape, and can be fitted into the branch pipe connecting branch pipe.

  Further, a guide convex step that is inscribed in the periphery of the branch pipe connection opening when connected to the branch pipe connection opening at the pipe end to be connected to the main pipe in the branch pipe connection branch pipe. In the configuration in which the portion is provided, the extension portion of the branch pipe connection guide member is widened by the thickness of the guide convex step portion in a direction orthogonal to the mounting direction to the branch pipe connection branch pipe. In the state where the branch pipe connection guide member is fitted in the branch pipe connection branch pipe in advance, the base end edge on the base side of the wide section is connected to the guide protrusion of the branch pipe connection branch pipe. It is good also as a branch pipe connection guide member made to contact | abut to the front-end | tip of a part.

  With the above configuration, the guide convex step portion of the branch pipe connection branch pipe is protected by the wide portion of the branch pipe connection guide member, so that the branch pipe connection branch pipe is connected to the branch pipe connection opening of the main pipe. At this time, the guide convex step portion of the branch pipe connection branch interferes with the periphery of the branch pipe connection opening portion, and the guide convex step portion and the periphery of the branch pipe connection opening portion are damaged or scratched. There is no sticking.

  The present invention has an effect that the connecting operation between the main pipe and the branch pipe connecting branch pipe can be performed easily and quickly.

Longitudinal sectional view showing the connection structure between the sewage main pipe and branch pipe connection branch pipe Exploded view of branch pipe connecting branch pipe External perspective view of water stop rubber sheet Front view of rubber sheet for water stop Side view of rubber sheet for water stop Back view of rubber sheet for water stop AA line sectional view of FIG. Partial enlarged sectional view of FIG. a) is a side view showing the state before the water stop rubber sheet is attached to the sewer main, b) is a side view showing the state where the water stop rubber sheet is attached to the sewer main, and c) is a stop. Top view showing a state where a rubber sheet for water is attached to a sewage main Partial enlarged sectional view of FIG. 9b External perspective view showing the usage state of the branch pipe connecting guide member Side view showing the state before installing the branch pipe connection branch pipe Description longitudinal section showing the state when installing a branch pipe connection branch pipe Schematic showing the sewage main pipe and branch pipe connection branch from the side External perspective view of other forms of rubber sheet for water stop Back view of other forms of water stop rubber sheet External perspective view of a branch pipe connecting guide member in another form a) is an external perspective view of another type of branch pipe connecting guide member, b) is an external perspective view of the branch pipe connecting guide member in a bent state, and c) is an external appearance of the branch pipe connecting guide member in a used state. It is a perspective view. a) is a longitudinal sectional view showing a branch pipe connecting branch pipe of another form, b) is a longitudinal sectional view showing a use state of the branch pipe connecting guide member of another form, and c) is for branch pipe connecting. Description longitudinal section showing the state when the branch pipe is attached Explanatory drawing which shows the guide member for branch pipe connection which has the wide part of another form

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments embodying the present invention will be described in detail.
As shown in FIG. 1 and the like, when connecting a branch pipe (not shown) to a cylindrical sewage main pipe (main pipe) 1 with ribs having a large number of annular ribs 1A arranged on the outer peripheral surface, The branch pipe connecting branch pipe 2 is connected to the branch pipe connecting opening 3 provided on the peripheral surface of the sewage main pipe 1 through the water stop rubber sheet 40.
The annular rib 1A of the sewage main pipe 1 is for securing strength and rigidity against earth pressure when the sewage main pipe 1 is buried. The branch pipe connection opening 3 is formed in a penetrating manner on the peripheral wall of the sewage main pipe 1 by using a drilling means such as a horuseau at a work site in consideration of the arrangement of the branch pipe. However, the branch pipe connection opening 3 is not limited to being formed at the work site, and the branch pipe connection opening 3 may be formed in advance at a factory or the like.

The branch pipe connecting branch pipe 2 will be described with reference to FIG.
As shown in FIGS. 1 and 2, the branch pipe connection branch pipe 2 includes a locking member 6 that is locked to the sewage main pipe 1, and an outer peripheral surface of the sewage main pipe 1 that is externally fitted to the locking member 6. And a connecting member 9 inserted into the saddle member 7 and finally connected to the branch pipe. The saddle member 7 constitutes a saddle portion of the branch pipe connecting branch pipe 2.

The locking member 6 is provided with a movable claw 4 and a fixed claw 5 that are locked to the periphery of the branch pipe connection opening 3 provided in the sewage main pipe 1. In the locking member 6, the movable claw 4 and the fixed claw 5 have a substantially L-shaped cross section, and each has a locking plate 10 that is extended substantially horizontally. The shape of the locking plate 10 is an arch shape along the shape of the inner peripheral surface of the peripheral edge of the branch pipe connection opening 3 of the sewage main pipe 1. The movable claw 4 is provided with a pair of pivot pins 11 projecting from the upper side surface of the movable claw 4 and pivotally mounted on the locking member 6 via the pivot pins 11. On the other hand, the fixing claw 5 is provided integrally with the locking member 6. Further, on the inner peripheral surface of the locking member 6 and above the locking plate 10 of the movable claw 4 and the fixed claw 5, a tapered contact step 13 having a diameter reduced downward is provided. Is provided.
In this embodiment, the movable claw 4 and the fixed claw 5 are arranged so as to be aligned in the pipe axis direction of the sewage main pipe 1 when the movable claw 4 and the fixed claw 5 are engaged with the branch pipe connection opening 3.

A pair of saddle plates 14, 14 are provided in the lower part of the saddle member 7 so as to extend substantially horizontally. The saddle plate 14 is made of a hard vinyl chloride resin, and a downward contact surface 15 that comes into contact with a rubber sheet surface 40A of a water-stopping rubber sheet 40 described later is curved along the outer peripheral surface of the sewage main pipe 1. It is made into a shape. Further, ribs 7A are provided on the upward peripheral surface of the saddle plate 14, and the rigidity, strength, etc. of the saddle plate 14 are ensured.
Further, a contact step 16 is provided on the upper inner peripheral surface of the saddle member 7, and an annular engagement claw 17 projects from the inner peripheral surface of the upper end of the saddle member 7.

An insertion portion 18 is provided below the connection member 9 via a flange portion 21. A downward step surface 23 is formed at the lower portion of the flange portion 21, and a ring-shaped packing 24 is fitted along the step surface 23. A locking step 22 is formed below the step surface 23. Furthermore, a tapered contact portion 20 having a diameter reduced in the distal direction of the insertion portion 18 is provided at the lower end portion of the insertion portion 18.
Further, a pair of left and right foldable handles 25 are attached to the outer periphery of the connecting member 9. A rubber ring receiving port 8 into which the branch pipe is inserted is provided at the upper part of the connecting member 9, and a rubber ring 31 abutting on the peripheral surface of the branch pipe is provided on the inner peripheral surface of the rubber ring receiving port 8. It is installed.

In addition, in the connection member 9, a ring-shaped pressing member 26 is fitted to the locking step portion 22. As shown in FIG. 2, the pressing member 26 has a substantially L-shaped cross section, is externally inserted into the insertion portion 18 of the connection member 9, and is placed on the step surface 23 of the connection member 9 via the packing 24. The upper peripheral surface 27 of the pressing member 26 abuts, and the inner upper peripheral surface 30 of the pressing member 26 abuts on the locking step portion 22 of the connecting member 9.
Further, the pressing member 26 is provided with a lower peripheral surface 28 on which the contact step 16 of the saddle member 7 and the upper end 6A of the locking member 6 contact.

The water stop rubber sheet 40 will be described with reference to FIG.
As shown in FIG. 1, the water stop rubber sheet 40 is interposed between the outer peripheral surface of the sewage main pipe 1 and the saddle plate 14 of the saddle member 7. A rubber material such as natural rubber or synthetic rubber is adopted as the material for the water-stopping rubber sheet 40, and the rubber sheet 40 is formed in a substantially horseshoe shape as a whole.

As shown in FIG. 3 and the like, a substantially rectangular rubber sheet opening 43 is formed substantially at the center of the water-stopping rubber sheet 40. Moreover, as shown in FIGS. 6 and 7, the annular rib 1 </ b> A of the sewage main pipe 1 is fitted on the rubber sheet back surface 40 </ b> B that contacts the outer peripheral surface of the sewage main pipe 1 in the water stop rubber sheet 40. A large number of rib grooves 41 are arranged in parallel.
In addition, a single water stopping protrusion 42 is provided on the rubber sheet back surface 40B so as to surround the rubber sheet opening 43. As shown in FIG. 10, the water stopping ridge 42 is configured such that the tip edge of the water stopping ridge 42 has the sewage water in a state where the water stopping rubber sheet 40 is attached to the sewage main pipe 1. As shown in FIG. 8, the water stop rubber sheet 40 adheres to the sewage main pipe 1 in the protruding direction L of the water stop ridge 42 as shown in FIG. In this state, it is set in a direction orthogonal to the outer peripheral surface of the sewage main pipe 1.

Further, at the portion where the rib groove 41 and the water stopping ridge 42 intersect on the rubber sheet back surface 40B, the water stopping ridge 42 is also provided along the groove wall in the rib groove 41. When the annular rib 1A is fitted into the rib groove 41, the leading edge of the water stopping ridge 42 is set in pressure contact with the annular rib 1A.
Moreover, as shown in FIG. 6, the rib groove 41 and the water stopping protrusion 42 intersecting each other are set so as to be orthogonal when viewed from the rubber sheet back surface 40B side.

  Further, among the rib grooves 41 described above, a pair of rib grooves 41 </ b> A located at both ends in the tube axis direction of the sewage main pipe 1 in a state where the rubber sheet for water stop 40 is attached to the sewage main pipe 1. 41A is set so that it may be arrange | positioned on the outer side of this protrusion 42 for water stop.

  On the other hand, as shown in FIG. 8, a single auxiliary protrusion 45 surrounds the rubber sheet opening 43 on the rubber sheet surface 40 </ b> A that is opposite to the rubber sheet back surface 40 </ b> B and is in contact with the saddle member 7. Is provided. The auxiliary protrusion 45 is disposed at a position directly behind the water stopping protrusion 42 in the protrusion direction L of the water stopping protrusion 42 and is opposite to the protrusion direction L of the water stopping protrusion 42. Protruding.

Also, the rubber sheet surface 40A is provided with both end rib groove alignment marks 46, 46 provided along the rib grooves 41A, 41A at both ends in a groove shape. Further, as shown in FIG. 3, the rubber sheet surface 40A is provided in the center of the sewage main pipe 1 with the water-stopping rubber sheet 40 properly attached to the sewage main pipe 1. A mark alignment mark 47 that matches the mark 1B (see FIG. 9c) along the tube axis is also provided.
Further, a rib groove alignment mark 48 adapted to the position of the rib groove 41 of the sewage main pipe 1 is also formed in a groove shape on a pair of peripheral edges parallel to the pipe axis of the sewage main pipe 1 in the rubber sheet opening 43. Are provided in plurality.
The shape and the like of the alignment marks 46, 47, and 48 may be other configurations, may be convex, may be displayed with a marker, or may be linear. It may be a dot shape.

In the structure described so far, in order to obtain the connection structure 60 between the sewage main pipe 1 and the branch pipe connecting branch pipe 2 by connecting the branch pipe connecting branch pipe 2 to the sewage main pipe 1, The water stop rubber sheet 40 is attached to the sewage main pipe 1.
At this time, as shown in FIG. 9a, the branch pipe connection opening 3 provided in the sewage main pipe 1 and the rubber sheet opening 43 of the water stop rubber sheet 40 are communicated with each other. While visually observing the alignment marks 46, 47, 48, the rib groove alignment marks 46 at both ends and the corresponding annular rib 1 A, the marked line alignment marks 47 and 1 B, and the rib groove alignment mark 48. And the annular rib 1A are respectively fitted, and the annular rib 1A of the sewage main pipe 1 is fitted into the rib grooves 41 and 41A of the water-stopping rubber sheet 40, respectively, and the outer periphery of the sewage main pipe 1 is fitted. As shown in FIGS. 9 b and 9 c, the water-stopping rubber sheet 40 is connected to the sewage main pipe 1 with the surface and the annular rib 1 </ b> A pressed against the water-stopping protrusion 42 of the water-stopping rubber sheet 40. It adheres to the proper position of the outer peripheral surface of.
In addition, after applying a bonding agent to the outer peripheral surface of the sewage main pipe 1 and / or the rubber sheet back surface 40B of the water-stopping rubber sheet 40, the water-stopping rubber sheet 40 may be attached.

Next, the branch pipe connecting branch pipe 2 is connected to the sewage main pipe 1.
Specifically, as shown in FIG. 11, a branch pipe connection guide member 65A made of, for example, a single cardboard plate member can be inserted into the pipe via the pipe end of the branch pipe connection branch pipe 2 and detachable in advance. The branch pipe connecting guide member 65A is inserted into one end of the branch pipe connecting branch pipe 2 from the pipe end on the sewage main pipe 1 side, and the inserted outlet 66 is connected to the branch pipe connecting opening 3. It is set as the dimension shape which can be inserted in.
In the state where the branch pipe connection guide member 65A is fitted in the branch pipe connection branch pipe 2 as described above, the width direction orthogonal to the insertion direction of the branch pipe connection guide member 65A into the branch pipe connection branch pipe 2 The radial direction of the branch pipe connecting branch pipe 2 coincides.

  Then, at the time of connection work, as shown in FIG. 12, the contact surface of the saddle plate 14 of the saddle member 7 is inserted while inserting the feeding portion 66 of the branch pipe connecting guide member 65A into the branch pipe connecting opening 3. 15 is brought into contact with the rubber sheet surface 40A of the water-stopping rubber sheet 40, and the branch pipe connecting branch pipe 2 is disposed at an appropriate position with respect to the sewage main pipe 1.

Next, as shown in FIG. 13, the fixed claw 5 of the locking member 6 is locked to the inner peripheral surface of the peripheral edge of the branch pipe connection opening 3 of the sewage main pipe 1, and the movable claw 4 is pivoted. Is turned inward so that the movable claw 4 can pass through the branch pipe connection opening 3.
Next, after allowing the movable claw 4 of the locking member 6 to pass through the branch pipe connection opening 3 of the sewage main pipe 1, the movable claw 4 is rotated outward about the pivot pin 11, The movable claw 4 is locked to the inner peripheral surface of the peripheral edge of the branch pipe connection opening 3. Thereafter, the abutment portion 20 of the insertion portion 18 of the connection member 9 is brought into contact with the abutment step portion 13 of the locking member 6 while the handle 25 is used as a clue, and the flange portion 21 of the connection member 9 and the saddle member 7 The annular engagement claw 17 is engaged, and the contact step 16 of the saddle member 7 and the upper end 6A of the locking member 6 are brought into contact with the lower peripheral surface 28 of the pressing member 26. Then, the upper portion of the movable claw 4 is also sandwiched between the outer peripheral surface of the insertion portion 18 of the connecting member 9 and the inner peripheral surface of the saddle member 7, and the rotation of the movable claw 4 is prevented. It is impossible to pass through the connection opening 3.
As a result, the branch pipe connecting branch pipe 2 is securely connected to the sewage main pipe 1, and the saddle plate 14 of the saddle member 7 has a contact surface 15 between the contact surface 15 and the outer peripheral face of the sewage main pipe 1. A water-stopping rubber sheet 40 is interposed (see FIG. 1). In such an interposed state, the tip edge of the auxiliary protrusion 45 of the water stop rubber sheet 40 is in pressure contact with the contact surface 15 of the saddle plate 14 and the tip of the water stop protrusion 42 is provided. The edge is pressed against the outer peripheral surface of the sewage main pipe 1 and the annular rib 1A, and a watertight state is secured.
The branch pipe connection guide member 65A may be taken out from the branch pipe connection branch pipe 2 and discarded when it becomes unnecessary.

  In the connection structure 60 between the sewage main pipe 1 and the branch pipe connecting branch 2 described above, as shown in FIG. 14, the radius of curvature R1 of the contact surface 15 of the saddle plate 14 of the saddle member 7 is the sewage main pipe. 1 is set to be smaller than the radius of curvature R2 of the rubber sheet surface 40A of the water-stopping rubber sheet 40 which is attached to the outer peripheral surface of the water-resistant rubber and is curved. With this configuration, the saddle plate 14 comes into contact with the water-stopping rubber sheet 40 while strongly biting into it, and the sealing performance of the water-stopping rubber sheet 40 is further improved. However, the radius of curvature R1 of the contact surface 15 of the saddle plate 14 may be set to be equal to the radius of curvature R2 of the rubber sheet surfaces 40A and 50A of the water-stopping rubber sheets 40 and 50.

Further, instead of the water stop rubber sheet 40, a water stop rubber sheet 50 shown in FIGS. 15 and 16 may be used. Specifically, the water-stopping rubber sheet 50 has a substantially circular shape in plan view, and a substantially circular rubber sheet opening 53 is formed at the center. In addition, a water stop protrusion 52 is provided on the rubber sheet back surface 50 </ b> B of the water stop rubber sheet 50 so as to surround the rubber sheet opening 53.
Further, a large number of rib grooves 51 are arranged in parallel on the rubber sheet back surface 50 </ b> B. The rib grooves 51 </ b> A and 51 </ b> A located at both ends in the pipe axis direction of the main pipe 1 are disposed outside the water stopping protrusion 52.
Further, the auxiliary protrusion 55 is provided on the rubber sheet surface 50 </ b> A, and a mark alignment mark 57 and a rib groove alignment mark 58 are further provided.

  Furthermore, the external shape of the water-stopping rubber sheets 40 and 50 can be changed as appropriate. Moreover, you may use the rubber sheet 40,50 for water stop in which the above-mentioned auxiliary | assistant protrusion 45,55 is not provided.

  Further, the branch pipe connecting branch pipe 2 described above is a so-called rotational mounting type branch pipe, but other types of branch pipes may be used. For example, it may be a known branch pipe connection branch pipe that is fixed to a sewage main pipe using a wire.

  The above-mentioned branch pipe connection guide member 65A can be appropriately changed without departing from the purpose of facilitating the connection of the branch pipe connection branch pipe 2. Hereinafter, although a modification is demonstrated, description is simplified or abbreviate | omitted about the part which is common in the above-mentioned structure.

[Modification 1]
For example, as shown in FIG. 17, a branch pipe connecting guide member 65B is proposed in which two plate pieces 67, 67 are combined in a cross shape in plan view.

[Modification 2]
Further, as shown in FIG. 18 a, a branch pipe connection guide member 65 </ b> C that is made of a single plate and is foldable along a fold line k along the insertion direction into the branch pipe connection branch 2 is proposed.
As shown in FIG. 18b, the branch pipe connecting guide member 65C has a lateral width in a direction perpendicular to the folding line k in the branch pipe connecting guide member 65C in a state of being bent at a folding line k of the branch pipe connecting branch pipe 2. The state before bending by inserting the branch pipe connection guide member 65C into the original shape by opening the branch pipe connection guide member 65C in the bent state, as shown in FIG. 18c. Then, it is fitted into the branch pipe connecting branch pipe 2.

[Modification 3]
Further, a branch pipe connection guide member 65D shown in FIG. 19 is proposed.
The branch pipe connection branch pipe 2 in the case where the branch pipe connection guide member 65D is employed is connected directly to the sewage main pipe 1 via a bonding agent or the like without using the rubber sheet 40, 50 for water stoppage. As shown in FIG. 19 a, when the pipe end 2 </ b> A to be connected to the sewage main pipe 1 is connected to the branch pipe connection opening 3, the peripheral edge of the branch pipe connection opening 3. An annular guide step 2B inscribed in is provided.

  On the other hand, the wide portion 70 that is wider in the lateral direction (the direction perpendicular to the mounting direction to the branch pipe connecting branch pipe 2) than the other parts is provided in the outlet 66 of the branch pipe connecting guide member 65D. It has been. Specifically, the wide portion 70 is widened by the thickness of the guide convex step portion 2B, and as shown in FIG. 19b, the left and right sides respectively extended on both sides on the base side of the wide portion 70. The branch pipe connection guide member 65D is appropriately bent so that the pair of base end edges 70A and 70A abuts the tip of the guide convex step portion 2B of the branch pipe connection branch pipe 2. The branch pipe connecting guide member 65 </ b> D is fitted into the branch pipe 2.

  Then, as shown in FIG. 19c, while inserting the feeding portion 66 of the branch pipe connecting guide member 65D into the branch pipe connecting opening 3, the guide convex step 2B of the pipe end 2A of the branch pipe connecting branch 2 is moved. The branch pipe connecting branch pipe 2 is disposed in the branch pipe connecting opening 3 so as to be inscribed in the periphery of the branch pipe connecting opening 3.

  Further, as shown in FIG. 20, the wide portion 70 of the sending portion 66 may be a tapered wide portion 71 whose lateral width decreases toward the tip. With such a configuration, the outer edge of the wide portion 71 causes a guiding action, so that the feeding portion 66 can be more easily inserted into the branch pipe connection opening 3.

[Other variations]
The branch pipe connecting guide members 65A to 65D described above may be made of a known foam material or the like instead of the cardboard. Moreover, the external appearance shape of the extension part 66 of the branch pipe connection guide members 65 </ b> A to 65 </ b> D can be appropriately changed to a shape that can be easily inserted into the branch pipe connection opening 3.

1 Sewage main (main)
2 Branch pipe connecting branch pipe 2A Pipe end 2B Guide convex step part 3 Branch pipe connecting opening parts 65A to 65D Branch pipe connecting guide member 66 Sending parts 70, 71 Wide part 70A Base edge

Claims (4)

A method of connecting a branch pipe connection branch pipe to a branch pipe connection opening provided on a peripheral surface of a main pipe,
A branch pipe connecting guide member is fitted in the branch pipe connecting branch pipe in advance, and one end of the branch pipe connecting guide member is connected to the main pipe of the branch pipe connecting branch pipe from the pipe end. Set the sized shape that can be inserted into the branch pipe connection opening of the main pipe,
When connecting the branch pipe connection branch pipe to the branch pipe connection opening portion of the main pipe, the branch pipe connection guide member is inserted into the branch pipe connection opening portion while inserting the extension portion of the branch pipe connection guide member. A branch pipe connection branch connection method, wherein a branch pipe is arranged in the branch pipe connection opening of the main pipe. A branch pipe connecting guide member used in the branch pipe connecting branch pipe connecting method according to claim 1,
The branch pipe connecting guide member is made of a plate material,
A branch pipe connection characterized in that a width direction of the branch pipe connection guide member coincides with a radial direction of the branch pipe connection branch pipe while the branch pipe connection guide member is fitted in the branch pipe connection branch pipe. Guide member. The branch pipe connecting guide member is composed of a foldable plate material,
In the state where the branch pipe connection guide member is bent, the lateral width of the branch pipe connection guide member is smaller than the pipe diameter of the branch pipe connection branch pipe,
3. The branch pipe connecting guide member is fitted into the branch pipe connecting branch pipe when the branch pipe connecting guide member in a bent state is in a state before being bent in the branch pipe connecting branch pipe. Guide member for connecting the branch pipe. At the pipe end to be connected to the main pipe in the branch pipe connection branch pipe, there is a guide convex portion that is inscribed in the periphery of the branch pipe connection opening when connected to the branch pipe connection opening. In the provided configuration,
A wide portion that is widened by the thickness of the guide convex step portion in the direction orthogonal to the mounting direction to the branch pipe connecting branch pipe is provided in the delivery portion of the branch pipe connecting guide member,
With the branch pipe connecting guide member fitted in the branch pipe connecting branch pipe in advance, the base end edge of the base of the wide part contacts the tip of the guide convex step of the branch pipe connecting branch pipe The branch pipe connection guide member according to claim 2 or claim 3.