JP2005192329A - Branching pipe joint - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a branching pipe joint that is mountable at any position in the circumferential direction of a main pipe bent in every curvature radius, that can be used at a place having a less mounting space, and that is good in applicability to a construction site. <P>SOLUTION: This branching pipe joint 11 connects a branch pipe that is branched from the main pipe 1 that is embedded underground to the peripheral edge portion 10a of a branching through-hole 10 provided in the main pipe 1, holding a water-tight state. The branching pipe joint 11 is formed separately into a branch pipe member 13, which has a base end portion 13b that is made to contact the peripheral end portion 10a of the branching through-hole 10 from the outside direction of the main pipe 1, and a saddle member 12, which covers the base end portion 13b of the branch pipe member 13 and grips the base end portion 13b between the peripheral edge portion 10a of the branching through-hole 10 and itself, by being mounted on the outside surface 1a of the main pipe 1. This saddle member 12 is made of a rubber-like elastic material, a flexible soft material. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention mainly relates to a branch pipe joint used for a branch portion when a branch pipe such as a branch pipe or a household lead-in pipe is branched from a main pipe buried in a common groove or the like.

  Conventionally, branch pipe joints as shown in FIGS. 22 to 25 are known (see, for example, Patent Document 1).

  First, in terms of configuration, in the conventional one, a communication cable such as an optical fiber cable embedded in a common groove in the ground is inserted into the main pipe 1 constituting the trunk line.

  This main pipe 1 is mainly composed of a material made of hard vinyl chloride resin, and a through hole 2 through which the communication cable is branched and inserted is formed at an arbitrary position.

  The through-hole 2 is provided with a branch pipe joint 3 attached thereto.

  The branch pipe joint 3 is mainly formed with a saddle portion 3a having a semicircular arc-shaped cross section substantially the same as the outer peripheral surface shape of the main pipe 1, and the saddle portion 3a. The main pipe 1 has a branch pipe portion 3b configured to have an acute angle with respect to the pipe axis direction, and is made of a hard vinyl chloride resin material in substantially the same manner as the main pipe 1.

  Moreover, the cylindrical branch pipe connection part 4 is provided in the front-end | tip part of this branch pipe part 3b.

  Next, the operation of this conventional branch pipe joint 3 will be described.

  In the branch pipe joint 3 configured as described above, the inner side surface 3c of the saddle portion 3a is attached and fixed to the outer side surface 1a of the main pipe 1 at the periphery of the through hole 2 using an adhesive or the like.

The communication cable branched in the main pipe 1 is inserted into the branch pipe 5 connected to the branch pipe connecting portion 4 through the branch pipe joint 3 and drawn into the building 6 such as a house.
Japanese Patent No. 2530941 (FIG. 4, from (2) leaf right column, line 23 to (3) leaf right column, line 7)

  However, as shown in FIG. 24, such a conventional branch pipe joint 3 is curved with a predetermined radius of curvature R (for example, R = 3 to 10 m) in the in-plane / outside direction of the connecting portion. When applied to the need to branch from a bent portion of a main pipe having a shape, the following problems occur.

  That is, when the saddle portion 3a is to be mounted on the outer surface 1a side of the main tube 1, the inner surface 3c of the saddle portion 3a matches the shape of the outer surface 1a of the straight main tube 1 that is not curved in advance. Thus, a gap a is generated between the outer surface 1a of the main pipe 1 and the inner surface 3c.

  Further, as shown in FIG. 25, in the case of the through hole 2 formed on the outer side surface 1a inside the curved shape of the main pipe 1, the outer edge 1d of the saddle portion 3a is formed on the outer side surface 1a of the main pipe 1. , They contact at one point, and a gap b is generated between the outer surface 1a and the inner surface 3c.

  When such gaps a and b are generated, there is a problem that the adhesiveness due to the adhesive is lowered and it is difficult to maintain the watertight performance above a certain level.

  Further, when a branch pipe 5 is newly added to the existing main pipe 1, a through hole 2 is formed in an arbitrary outer side surface 1 a in the circumferential direction, and the branch pipe joint 3 must be attached.

  For this reason, if it is going to prepare the branch pipe joint 3 corresponding to all the angles, it was difficult to prepare the kind corresponding to all the curvature radii and shapes.

  Further, since the branch pipe joint 3 is made of a hard vinyl chloride resin material, as shown in FIG. 22, the branch pipe portion 3b having a protruding height h1 can be stored in the joint groove. When sufficient space cannot be secured, there is a problem that it is difficult to mount the branch pipe joint 3.

  Therefore, the present invention can be installed at any circumferential position among main pipes bent at any radius of curvature while ensuring water tightness, and can be used in places where installation space is small. It is an object to provide a good branch pipe joint.

  In order to achieve the above object, in the invention described in claim 1, a branch pipe branched from a main pipe buried in the ground is connected to a peripheral portion of a branch through hole provided in the main pipe and watertight. A branch pipe joint that is connected while maintaining a state, the branch pipe joint having a base end portion that is in contact with a peripheral edge portion of the branch through-hole from the outside of the main pipe; Covers the base end portion of the branch pipe member, and is formed by dividing the base end portion into a saddle member sandwiched between the peripheral edge portion of the branch through hole by being attached to the outer surface of the main pipe. In addition, the present invention is characterized by a branch pipe joint in which the saddle member is made of a flexible soft material.

  Further, according to a second aspect of the present invention, the saddle member has a pipe insertion part that is inserted through the branch pipe member and is fitted along the both side surface parts of the main pipe from the pipe insertion part. The branch pipe joint according to claim 1, further comprising an attachment surface portion for embedding the main pipe from both sides by extending a pair and allowing the two leading ends to approach and separate.

  Further, according to a third aspect of the present invention, the saddle member is provided with an attaching surface portion that is in contact with the outer surface of the main pipe and extends integrally over substantially the entire circumference of the outer surface of the main pipe. The branch pipe joint according to claim 1 or 2 is characterized.

  According to a fourth aspect of the present invention, the side edge portion along the longitudinal direction of the attachment surface portion that is in contact with the outer surface of the main pipe of the saddle member has a bellows shape that can be expanded and contracted in the main pipe extending direction. The branch pipe joint according to claim 1, wherein the branch pipe joint is formed.

  According to a fifth aspect of the present invention, the base end portion of the branch pipe member is brought into contact with both longitudinal end edges of the branch pipe through-hole formed in the main pipe, and the saddle The branch pipe joint according to any one of claims 1 to 4, wherein a pair of locking pieces are provided between the peripheral edge of the branch through hole by a member.

  Further, according to a sixth aspect of the present invention, the proximal end portion of the branch pipe member is brought into contact with the peripheral edge portion of the branch pipe through hole formed in the main pipe, and the saddle member The branch pipe joint according to any one of claims 1 to 4, wherein a flange portion sandwiched between a peripheral edge portion of the branch through hole is integrally provided.

  According to a seventh aspect of the present invention, the proximal end portion of the branch pipe member is brought into contact with both longitudinal end edges of the branch pipe through-hole formed in the main pipe, and the saddle The branch pipe joint according to any one of claims 1 to 4, wherein a plurality of locking piece portions sandwiched between the peripheral edge portion of the branch through hole by the member are provided at intervals. It is a feature.

  Moreover, what is described in Claim 8 is characterized by the branch pipe joint as described in any one of Claims 1 thru | or 7 which comprises the front-end branch part of the said branch pipe member with the bendable cylindrical member. Yes.

  Further, in the ninth aspect, the cylindrical member is formed of a flexible pipe member, and is configured to be bendable from the vicinity of the base end portion inside the saddle member. Item 8 is characterized by the branch pipe joint.

  In the first aspect of the present invention configured as described above, the base end portion of the branch pipe member of the branch pipe joint is in contact with the peripheral edge of the branch through hole from the outside of the main pipe. Then, it is covered with the saddle member and is sandwiched and fixed between the peripheral edge portion of the branch through hole on the outer side surface of the main pipe.

  Since the saddle member is made of a flexible soft material, the branch through-hole is curved to follow the shape of the main pipe regardless of where the branch through hole is formed. Equally deformed and mounted, the branch pipe member is directly and firmly fixed to the peripheral edge of the branch through hole.

  Therefore, since it can be mounted on main pipes of any curvature radius and shape, it is not necessary to prepare a plurality of types of branch pipe joints correspondingly. For this reason, the increase in manufacturing cost can be suppressed.

  And since the said saddle member is comprised with the flexible soft material, it follows the shape of the said main pipe and closely_contact | adheres. For this reason, good watertight performance can be exhibited.

  According to a second aspect of the present invention, the main pipe is held from both sides by a pair of attachment surface portions of the saddle member.

  For this reason, the branch pipe member inserted through and fitted into the pipe insertion portion provided integrally with the saddle member also has an attachment strength of the branch pipe member in the falling direction along the circumferential direction of the main pipe. Improved and more firmly attached.

  Further, in the third aspect of the present invention, the attachment surface portion that is provided integrally with the saddle member and is in contact with the outer surface of the main pipe extends over substantially the entire circumference of the outer surface of the main pipe. It is installed.

  For this reason, the attachment strength of the branch pipe member in the falling direction along the circumferential direction of the main pipe can be further improved and firmly attached.

  According to a fourth aspect of the present invention, the bellows-like portion formed on the side edge portion along the longitudinal direction of the attachment surface portion that is in contact with the outer surface of the main pipe of the saddle member is the main pipe extending direction. To follow the curved shape of the main pipe.

  For this reason, even with a main pipe having a small radius of curvature, the watertight performance can be further improved.

  And as for what was described in Claim 5, a pair of latching edge part provided in the base end part of the branch pipe member has the longitudinal direction both ends edge of the branch pipe through-hole formed in the main pipe, Each is abutted.

  For this reason, the attachment strength of the branch pipe member in the falling direction along the pipe axis direction of the main pipe is further improved.

  According to a sixth aspect of the present invention, the flange portion sandwiched between the peripheral portion of the branch pipe through hole is deformed by the saddle member following the curved shape of the main pipe.

  For this reason, by setting an annular flange portion over the entire circumference of the peripheral edge of the branch pipe through hole, the branch pipe member in the fall direction along the pipe axis direction as well as the fall direction along the circumferential direction of the main pipe The mounting strength can be further improved.

  According to the seventh aspect of the present invention, a plurality of locking piece portions provided at the base end portion of the branch pipe member are provided at intervals.

  For this reason, between each locking piece part, following the curved shape of the main pipe, it is expanded or contracted and deformed, over the entire periphery of the peripheral edge of the branch pipe through hole, a plurality of locking piece parts Can be set.

  Accordingly, it is possible to further improve the mounting strength of the branch pipe member in the falling direction along the pipe axis direction as well as the falling direction along the circumferential direction of the main pipe.

  Moreover, since the tip branch part of the said branch pipe member was comprised with the bendable cylindrical member, what was described in Claim 8 can install a branch pipe even in a narrow installation space.

  Further, in the ninth aspect of the invention, since the cylindrical member is constituted by a flexible pipe member, when bent from the vicinity of the base end portion in the saddle member, together with the branch pipe to be connected It can be bent and the amount of protrusion can be reduced.

  For this reason, a branch pipe can be arranged even in a narrow installation space, the compatibility at the construction site can be improved, and the earthquake resistance is also improved.

  Next, a branch pipe joint according to the best mode for carrying out the present invention will be described with reference to the drawings.

  In addition, the same code | symbol is attached | subjected and demonstrated about the same or equivalent part as the said prior art example.

  FIG. 1 thru | or FIG. 21 demonstrates the branch pipe coupling of embodiment of this invention.

  First, the configuration will be described. In the embodiment of the present invention, a communication cable such as an optical fiber cable embedded in a common groove in the ground is inserted into the main pipe 1 constituting the trunk line.

  The main pipe 1 is mainly made of a hard vinyl chloride resin material, and a branch through-hole 10 through which the communication cable is branched and inserted is formed at an arbitrary position.

  And the branch pipe branched from the main pipe 1 is connected so that the communication cable etc. derived | led-out from this branch through-hole 10 may be penetrated.

  The branch through hole 10 is provided with a branch pipe joint 11 that is connected to the peripheral edge portion 10a of the branch through hole 10 provided in the main pipe 1 while maintaining a watertight state.

  1 to 13 show a branch pipe joint 11 of Example 1 of an embodiment of the present invention.

  First, in terms of configuration, in the branch pipe joint 11 of the first embodiment, a saddle member 12 mainly composed of a rubber-like elastic material which is a flexible soft material, and the saddle member 12 are separated. The branch pipe is made of a material made of a hard vinyl chloride resin so that the branch angle is fixed to the pipe axis direction of the main pipe 1 with a certain acute angle α. Member 13.

  Among these, the saddle member 12 has a hollow cylindrical pipe insertion portion 12a into which the branch pipe member 13 is inserted and fitted, as shown in FIGS. The branch angle of the pipe insertion portion 12 a is configured to have a constant acute angle α with respect to the pipe axis direction of the main pipe 1, similarly to the branch pipe member 13.

  Further, from both the left and right sides of the pipe insertion portion 12a, the attachment surface portions 12b and 12b extending along the both side surface portions of the main pipe 1 are substantially the same as the outer peripheral surface shape of the main pipe 1. It has a semicircular arc-shaped cross section and is provided so as to be integrated with the tube insertion portion 12a.

  The main pipe 1 is configured to be held from both sides by allowing elastic deformation between the both end edges 12c, 12c of the attachment surface portions 12b, 12b so as to be able to approach and separate.

  In the first embodiment, as shown in FIG. 3, the distance between the two end edges 12c and 12c is expanded to the same dimension as the outer diameter of the main pipe 1 and the vicinity of the center of the pipe at the upper and lower positions. In addition, the two leading edges 12c and 12c are positioned so that the main pipe 1 is held from both sides.

  Further, in the first embodiment, as shown in FIGS. 6 and 7, an annular adhesive material flows into the contact surface on the main pipe 1 side of the saddle member 12 along the opening peripheral edge of the pipe insertion portion 12a. The prevention protrusion 12e protrudes downward.

  Further, as shown in FIGS. 8 to 10, the branch pipe member 13 is provided on a hollow cylindrical pipe main body 13a and a main pipe side of the pipe main body 13a, and a peripheral edge portion 10a of the branch through hole 10 is provided. And a base end portion 13b abutted from the outside of the main pipe 1 and mainly configured.

  As shown in FIGS. 4 and 8 to 10, the base end portion 13 b of the first embodiment is respectively applied to the longitudinal end edges 10 b and 10 b of the branch pipe through hole 10 formed in the main pipe 1. A pair of locking pieces 13c and 13c before and after being sandwiched between the saddle member 12 and the peripheral edge 10a of the branch through hole 10 are integrally provided.

  In the state where the branch pipe joint 11 is mounted, these locking pieces 13c and 13c are inserted into the recesses 12d and 12d formed before and after the pipe insertion part 12a of the saddle member 12. Thus, the saddle member 12 is configured such that no bulge or the like is formed on the surface thereof.

  Furthermore, on the back surface side of the base end portion 13b of the branch pipe member 13 of the first embodiment, the branch through hole 10 is inserted into the branch through hole 10 at a constant depth of the thickness of the main pipe 1. A cable protection projection 13e (FIGS. 9 and 10) that is fitted to the inner peripheral surface portion or formed smaller than the inner peripheral surface portion is integrally formed.

  The cable protection projection 13e is adapted to the shape of the branch through hole 10 and has an oval shape having a longitudinal direction along the tube axis direction. The cable protection projection 13e is integrated with the locking pieces 13c and 13c. Are formed in a substantially R-shaped cross section that does not form corners.

  Next, the operation of the branch pipe joint 11 of the first embodiment will be described.

  In the branch pipe joint 11 of the first embodiment, as shown in FIG. 1, the pipe body 13a of the branch pipe member 13 is inserted into the pipe insertion portion 12a from the lower surface side of the saddle member 12, The locking pieces 13c and 13c are positioned in the retracting recesses 12d and 12d formed before and after the tube insertion portion 12a.

  In this state, the base end portion 13 b of the branch pipe member 13 is covered with the saddle member 12.

  Next, through the branch main body 1a of the branch pipe member 13 through the branch through hole 10 formed in the outer surface 1a of the main pipe 1, the cable wiring such as the lead-in lead wire for the home is inserted, The pair of attachment surface portions 12 b and 12 b are attached to the peripheral portion 10 a of the branch through hole 10 in the outer surface 1 a of the main pipe 1.

  At this time, the size between the front end edges 12c, 12c of the attachment surface portions 12b, 12b is set slightly narrower than the diameter of the main pipe 1, and the front end edges 12c, 12c are mounted while being widened. Thus, the attachment surface portions 12b and 12b can be brought into pressure contact with each other so that the main pipe 1 is held from both the left and right sides by an elastic reaction force.

  Thus, in the first embodiment, in the branch pipe joint 11, the pair of locking pieces 13 c and 13 c formed at the base end part 13 b of the branch pipe member 13 is the longitudinal direction of the branch through hole 10. Are respectively brought into contact with the peripheral portion 10a located before and after the outer side of the main pipe 1 from the outside, and are directly in contact with the main pipe 1 at two points.

  The pair of locking pieces 13c and 13c are sandwiched between the saddle member 12 and the peripheral edge portions 10a and 10a of the branch through hole 10 on the outer side surface 1a of the main pipe 1. Fixed.

  Further, since the saddle member 12 is made of a rubber-like elastic material, as shown in FIGS. 11 to 13, the branch through hole 10 is curved in various directions. Even if it is formed in the portion, it follows the shape of the main pipe, is bent and deformed, and the branch pipe member 13 is directly and firmly fixed to the peripheral edge portion 10a of the branch through hole 10. The

  Therefore, since it can be attached to the main pipe 1 having any curvature radius (for example, R = about 3 to 10 m) and shape, it is not necessary to prepare a plurality of types of branch pipe joints. For this reason, the increase in manufacturing cost can be suppressed.

  And since the said saddle member 12 is comprised with the rubber-like elastic material, it follows the shape of the said main pipe 1, and adheres.

  For this reason, the adhesiveness at the time of making it adhere | attach by adhering an adhesive material between the said attachment surface parts 12b and 12b and the outer surface 1a of the main pipe 1 improves. Further, even when the periphery of the attachment surface portions 12b, 12b of the saddle member 12 is fastened and fixed with an annular band member, it is good between the peripheral edge portion 10a of the branch through hole 10 and the saddle member 12. Watertight performance can be demonstrated.

  Further, the main pipe 1 is held from both the left and right sides by the pair of attachment surface portions 12b and 12b of the saddle member 12.

  For this reason, the branch pipe member 13 that is inserted through and fitted into the pipe insertion portion 12a provided integrally with the saddle member 12 is also tilted along the circumferential direction of the main pipe 1 (in FIG. The attachment strength of the branch pipe member 13 in the direction indicated by the arrow C is improved, and the branch pipe member 13 is further firmly attached.

  Further, in the first embodiment, a pair of locking side portions 13c and 13c provided at the base end portion 13b of the branch pipe member 13 are provided at both ends in the longitudinal direction of the branch pipe through hole 10 formed in the main pipe 1. The edges 10b and 10b are in contact with each other.

  For this reason, the mounting strength of the branch pipe member 13 in the tilting direction along the pipe axis L direction of the main pipe 1 (the direction indicated by the white arrow D in FIG. 1) is further improved.

  As described above, the branch pipe joint 11 according to the first embodiment can be mounted at any circumferential position of the main pipe 1 bent at any curvature radius.

  In the first embodiment, the cable protection projection 13e integrally formed on the back surface side of the base end portion 13b of the branch pipe member 13 is integrally connected to the locking piece portions 13c and 13c. By being provided, it has a substantially R-shaped cross section that does not form corners.

  For this reason, when it is inserted into the branch through hole 10 at a constant depth of the thickness of the main pipe 1, it is fitted to the inner peripheral surface portion of the branch through hole 10 or formed smaller than the inner peripheral surface portion. Therefore, it is located between the communication cable and the inner peripheral surface portion of the branch through hole 10 at the time of mounting.

  Therefore, when the inner peripheral surface portion of the branch through hole 10 is formed to open the branch through hole 10, in an unfinished state in which chamfering or the like is not performed, for example, even if a burr or the like is protruded, This communication cable can be inserted without damaging it.

  Further, in the first embodiment, as shown in FIG. 7, an annular adhesive inflow preventing protrusion on the contact surface of the saddle member 12 on the main tube 1 side along the opening peripheral edge of the tube insertion portion 12a. 12e protrudes downward.

  Therefore, the adhesive material interposed between the main pipe contact surface on the back surface side of the saddle member 12 and the outer side surface 1a of the main pipe 1 is blocked by the adhesive material inflow prevention protrusion 12e. There is no possibility of flowing into the main pipe 1 from the branch through hole 10.

  14 to 16 show a branch pipe joint according to Embodiment 2 of the present invention. The same or equivalent parts as those in the first embodiment will be described with the same reference numerals.

  First, in terms of configuration, in the second embodiment, a saddle member 22 made of a rubber-like elastic material of the branch pipe joint 21 has a pair of attachment surface portions 22b extending integrally from the pipe insertion portion 12a. 22b is provided.

  The attachment surface portions 22b and 22b are extended over substantially the entire circumference of the outer surface 1a of the main pipe 1 so that the attachment surface portions 22b and 22b are in contact with the outer surface 1a of the main pipe 1. The tip edges 22c, 22c are configured to face each other on the back side of the tube insertion portion 12a.

  Next, the operation of the second embodiment will be described.

  In the second embodiment, in addition to the operational effects of the first embodiment, the attachment surface portions 22b and 22b that are provided integrally with the saddle member 22 and are in contact with the outer surface 1a of the main pipe 1, The tip edges 22c, 22c are extended to a position where they face each other over substantially the entire circumference of the outer surface 1a of the main pipe 1.

  For this reason, the mounting strength of the branch pipe member 13 is further improved in the falling direction along the circumferential direction of the main pipe 1 (the direction indicated by the white arrow C in FIGS. 14 and 16) and is firmly attached. be able to.

  Other configurations and operational effects are the same as or equivalent to those of the first embodiment, and thus the description thereof is omitted.

  FIG. 17 shows a branch pipe joint according to Embodiment 3 of the present invention. In addition, the same code | symbol is attached | subjected and demonstrated about the same thru | or equivalent part as the said Examples 1,2.

  First, in terms of configuration, in the third embodiment, the communication cable is branched into an arc inner outer surface 1b and an arc outer outer surface 1c of the main pipe 101 having an arc shape with a predetermined radius of curvature. The branch through-holes 10 and 10 to be inserted are formed as openings.

  The branch through-holes 10, 10 are respectively attached with branch pipe joints 11, 11 which are connected to the peripheral edge portion 10a of the branch through-hole 10 provided in the main pipe 1 while maintaining a watertight state. Is provided.

  Next, the effect of this Example 3 is demonstrated.

  In the third embodiment configured as described above, in addition to the operational effects of the first and second embodiments, the arc inner outer surface 1b of the main pipe 101 and the branch pipe joints 11 and 11 having the same shape are used. The communication cables led out from the branch through holes 10 and 10 respectively provided on the arc outer side outer surface 1c can be wired.

  For this reason, an increase in manufacturing cost can be suppressed as compared with a case where the branch pipe joint must be formed in an individual shape.

  Other configurations and operational effects are the same as or equivalent to those of the first and second embodiments, and thus the description thereof is omitted.

  FIG. 18 shows a branch pipe joint 31 of Example 4 of the embodiment of the present invention.

  First, in terms of configuration, in the branch pipe joint 31 of the fourth embodiment, the attachment surface portions 33b and 33b that are in contact with the outer surface of the main pipe of the saddle member 32 are provided integrally with the pipe insertion portion 12a. .

  The side edge portions 33c and 33c along the longitudinal direction of the attachment surface portions 33b and 33b have bellows-like portions 33d and 33d that can be expanded and contracted in the main pipe extending direction (the direction indicated by the white arrow E in FIG. 18). , Each is formed.

  Next, the effect of this Example 4 is demonstrated.

  In the branch pipe joint 31 of the fourth embodiment configured as described above, in addition to the operational effects of the first to third embodiments, the attachment surface portion that is in contact with the outer surface 1a of the main pipe 1 of the saddle member 32 is further provided. The bellows-like portions 33d and 33d formed on the side edges 33c and 33c along the longitudinal direction of 33b and 33b expand and contract in the extending direction of the main pipe 1 to follow the curved shape of the main pipe 1.

  For this reason, even if it is the main pipe 1 (for example, R = about 3-5 m) with a small curvature radius, watertight performance can be made still better.

  Other configurations and operational effects are the same as or equivalent to those of the first to third embodiments, and thus the description thereof is omitted.

  FIG. 19 shows a branch pipe member 43 used for the branch pipe joint 41 of Example 5 of the embodiment of the present invention.

  First, in terms of configuration, in the branch pipe member 43 of the fifth embodiment, the base end portion 43b formed integrally with the pipe body 13a has a peripheral edge portion of the branch pipe through hole 10 formed in the main pipe 1. 10a, and a thin plate-like flange portion 43c sandwiched between the peripheral edge portion 10a of the branch through hole 10 by the saddle member 12 as shown in the first, second, or fourth embodiment. However, the peripheral part 10a is formed in an annular shape over substantially the entire circumference and is provided so as to be integrated.

  Next, the effect of this Example 5 is demonstrated.

  In the branch pipe joint 41 of the fifth embodiment configured as described above, in addition to the operational effects of the first to fourth embodiments, the saddle member 12 and the like as shown in the first, second, or fourth embodiment further A thin plate-like flange portion 43c sandwiched between the peripheral edge portion 10a of the branch pipe through hole 10 follows the curved shape of the main pipe 1 and deforms.

  For this reason, an annular flange portion 43c that extends over the entire circumference of the peripheral edge portion 10a of the branch pipe through-hole 10 is set, and the falling direction along the circumferential direction of the main pipe 1 (the direction indicated by the white arrow C in FIG. 19). ) And the attachment strength of the branch pipe member 43 in the tilt direction along the pipe axis L direction (the direction indicated by the white arrow D in FIG. 19) can be further improved.

  Other configurations and functions and effects are the same as or equivalent to those of the first to fourth embodiments, and thus description thereof is omitted.

  FIG. 20 shows a branch pipe member 53 used for the branch pipe joint 51 of Example 6 of the embodiment of the present invention.

  First, in terms of configuration, in the branch pipe member 53 of the sixth embodiment, the base end portion 53b formed integrally with the pipe body 13a has a peripheral edge of the branch pipe through hole 10 formed in the main pipe 1. A plurality of locking pieces that are respectively brought into contact with the portion 10a and are sandwiched between the peripheral edge portion 10a of the branch through-hole 10 by the saddle member 12 as shown in the first, second, or fourth embodiment. .. Are provided at intervals in the circumferential direction.

  Next, the effect of this Example 6 is demonstrated.

  In the branch pipe joint 51 of the sixth embodiment configured as described above, in addition to the operation and effects of the first to fifth embodiments, the saddle member 12 as shown in the first, second, or fourth embodiment, and the like. A plurality of locking pieces 53c... Sandwiched between the peripheral edge portion 10a of the branch pipe through hole 10 are provided at intervals in the circumferential direction of the base end portion 53b.

  For this reason, between each locking piece part 53c, 53c follows the curved shape of the said main pipe 1, and expands or shrinks, and it extends over the perimeter of the peripheral part 10a of the said branch pipe through-hole 10. A plurality of locking pieces 53c can be set.

  Accordingly, this branching into the falling direction along the pipe axis direction (direction indicated by the hollow arrow D in FIG. 20) as well as the falling direction along the circumferential direction of the main pipe 1 (the direction indicated by the hollow arrow C in FIG. 20). The attachment strength of the pipe member 53 can be further improved.

  Other configurations and operational effects are the same as or equivalent to those of the first to fourth embodiments, and thus the description thereof is omitted.

  FIG. 21 shows a branch pipe joint 61 of Example 7 of the embodiment of the present invention.

  First, in terms of configuration, in the branch pipe joint 61 of the seventh embodiment, the branch pipe member 63 includes a flexible pipe member (EFVP pipe) 64 as a bendable tubular member.

  A connecting member 66 is fitted and fixed to the base end portion 65 on the main pipe 1 side of the flexible pipe member 64 via a fitting portion 66a.

  The connecting member 66 is in direct contact with the peripheral edge portion 10 a of the branch through hole 10 from the outside of the main pipe 1, and between the saddle member 12 and the peripheral edge portion 10 a of the branch through hole 10. A pair of locking pieces 65c and 65c are integrally formed before and after being sandwiched.

  Further, the pipe main body 64a of the flexible pipe member 64 can be bent in the upper, lower, left and right directions, and has a smooth inner surface so that there is no interference when the communication cable is inserted. .

  In addition, a connecting member 67 capable of connecting other branch pipes or the like is provided at the distal end portion of the pipe body 64a by being fixed via a fitting portion 67a.

  Further, the base end portion 65 is fitted in the tube insertion portion 12a, and the periphery thereof is inward by a band member 66b hung on the outer peripheral surface of the tube insertion portion 12a together with the tube insertion portion 12a. It is tightened and fixed to be watertight.

  In the base end portion 65 of the flexible pipe member 64, a part of the end edge of the pipe body 64a is located inside the saddle member 12 and connected to the fitting portion 66a. It is configured to be bendable from the vicinity of the portion 65.

  Next, in the branch pipe joint 61 of the seventh embodiment, a branch formed of a flexible pipe member 64 that can be bent between the saddle member 12 and the peripheral edge portion 10a of the branch through hole 10 of the main pipe 1. By holding the pair of locking pieces 65c, 65c of the base end portion 65 of the pipe member 63, the branch pipe member 63 constituted by the flexible pipe member 64 that can be bent can be easily attached.

  Furthermore, since the flexible pipe member 64 is constituted by a pipe body 64a that can be bent upward, downward, left, or right, if the flexible pipe member 64 is bent from the vicinity of the base end portion 65 inside the saddle member 12, It is possible to reduce the dimension amount h2 which is bent together with the pipe insertion portion 12a of the branch pipe member 12 and protrudes in the height direction.

  For this reason, the branch pipe joint 61 can be arranged even in a narrow installation space, and the compatibility at the construction site can be improved.

  In addition, earthquake resistance is improved.

  Other configurations and operational effects are substantially the same as those of the first to sixth embodiments, and thus the description thereof is omitted.

  As described above, the embodiment of the present invention and Examples 1 to 7 have been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and is not deviated from the gist of the present invention. Design changes are included in the present invention.

  For example, in the first embodiment, an adhesive is interposed between the main pipe contact surface on the back surface side of the saddle member 12 and the outer side surface 1a of the main pipe 1, and this branch pipe joint 11 and the main For example, a band member wound around the main pipe 1 at the front and rear positions of the pipe insertion portion 12a of the saddle member 12 is not limited thereto. The branch pipe joint 11 may be fixed to the main pipe 1 by any fixing means such as providing or using the adhesive and the band member together.

  Further, in the first embodiment, the saddle member 12 constituted by using a rubber-like elastic material as a flexible soft material has been shown and described. More specifically, for example, SBR, NBR, natural Even if it is composed of other soft synthetic resin materials such as rubber, butyl rubber, silicon rubber and other rubber elastomer materials, any shape, size and material can be used as long as they are flexible soft materials. Good.

  Further, in the first embodiment, as shown in FIG. 3, both end edges 12c, 12c of the attachment surface portions 12b, 12b are substantially the same as the peripheral surface shape extending up to the vicinity of the center of the pipe at the upper and lower positions. In the second embodiment, as shown in FIG. 14, the end edges 22c and 22c are extended to the opposite positions on the back side of the tube insertion portion 12a as shown in FIG. However, the present invention is not limited to this, and the open angle between the front end edges 12c and 12c is approximately 0 degrees to about 330 degrees. It may be.

It is a disassembled perspective view explaining the structure of the principal part in the branch pipe joint of Example 1 of the embodiment of the present invention. It is a top view explaining a mode that the branch pipe joint of Example 1 was mounted on the main pipe. FIG. 3 is a cross-sectional view at the position indicated by the line BB in FIG. FIG. 3 is a cross-sectional view at the position indicated by the line AA in FIG. 2 in the branch pipe joint of Example 1. It is a rear view of the saddle member used for the branch pipe joint of Example 1. It is a saddle member used for the branch pipe joint of Example 1, and is sectional drawing in the position shown to CC line in FIG. It is a bottom view of the saddle member used for the branch pipe joint of Example 1. It is a top view of the branch pipe member used for the branch pipe joint of Example 1. It is a front view of the branch pipe member used for the branch pipe joint of Example 1. It is a branch pipe member used for the branch pipe joint of Example 1, and is sectional drawing in the position shown by the DD line in FIG. It is sectional drawing in the position corresponded to the position shown to the AA line in FIG. 2, which shows a mode that the branch pipe coupling of Example 1 was employ | adopted as the main pipe | tube which formed the branch through-hole in the arc outer side. It is a longitudinal cross-sectional view which shows a mode that the branch pipe coupling of Example 1 was employ | adopted as the main pipe | tube which formed the branch through-hole in the circular arc inside. It is a top view which shows a mode that the branch pipe coupling of Example 1 was employ | adopted as the main pipe | tube which formed the branch through-hole in the circular arc side surface side. It is a front view explaining a mode that the saddle member and the branch pipe member were attached to the main pipe in the branch pipe joint of Example 2. It is a perspective view of the saddle member of the branch pipe joint of Example 2. It is a perspective view explaining a mode that the branch pipe joint of Example 2 was applied to the main pipe with a small curvature radius. It is a horizontal sectional view in the position along a pipe axis direction explaining composition which applied a branch pipe joint of Example 3 to both sides of a main pipe. It is a perspective view of the saddle member of the branch pipe joint of Example 4. It is a perspective view of the branch pipe member of the branch pipe joint of Example 5. It is a perspective view of the branch pipe member of the branch pipe joint of Example 6. It is a horizontal sectional view in the position along a pipe axis direction explaining composition which applied a branch pipe joint of Example 7 to a main pipe. It is the underground schematic diagram explaining the whole structure by the branch pipe joint of a prior art example. It is a disassembled perspective view explaining a mode that the branch pipe coupling of a prior art example is applied to a main pipe. It is the horizontal view along a pipe-axis direction which shows a mode that the branch pipe joint of the prior art example was employ | adopted as the main pipe | tube which formed the branch through-hole in the arc outer side. It is a horizontal view along the pipe-axis direction which shows a mode that the branch pipe joint of the prior art example was employ | adopted as the main pipe | tube which formed the branch through-hole inside the circular arc.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,101 Main pipe 1a Outer side surface 10 Branch pipe through-hole 10a Peripheral part 11, 21, 31, 41, 51, 61 Branch pipe joint 12, 22, 32, Saddle member 12a Pipe insertion part 12b, 22b Attachment surface part
13, 43, 53 Branch pipe member 13a Pipe body 13b, 33b, 43b, 53b Base end part 13c, 53c, 65c Locking piece part 33d Bellows part 43c Flange part 64 Flexible pipe member (cylindrical member)

Claims (9)

A branch pipe joint for connecting a branch pipe branched from a main pipe buried in the ground while maintaining a watertight state with a peripheral portion of a branch through hole provided in the main pipe,
The branch pipe joint covers a branch pipe member having a base end part abutting from the outer side of the main pipe on a peripheral edge of the branch through hole, and covers the base end part of the branch pipe member. By being mounted on the outer side surface, the base end portion is divided and formed into a saddle member sandwiched between the peripheral edge portion of the branch through hole, and the saddle member is made of a flexible soft material. A branch pipe joint characterized by   The saddle member has a tube insertion portion that is inserted through the branch tube member and is fitted, and a pair of the saddle member extends along both side surface portions of the main tube from the tube insertion portion, and the gap between the two distal end edges is extended. The branch pipe joint according to claim 1, further comprising an attachment surface portion that embraces the main pipe from both sides by enabling proximity and separation.   3. The saddle member according to claim 1 or 2, wherein an attachment surface portion that comes into contact with the outer surface of the main pipe is integrally extended over substantially the entire circumference of the outer surface of the main pipe. Branch fitting.   The bellows-shaped part which can be expanded-contracted in the said main pipe extension direction is formed in the side edge part along the longitudinal direction of the attachment surface part contact | abutted by the main pipe outer side surface of the said saddle member, It is characterized by the above-mentioned. The branch pipe joint according to any one of Items 1 to 3.   The base end portion of the branch pipe member is in contact with both longitudinal end edges of the branch pipe through hole formed in the main pipe, and is connected to the peripheral edge portion of the branch through hole by the saddle member. The branch pipe joint according to any one of claims 1 to 4, wherein a pair of locking pieces are sandwiched between the branch pipe joints.   The proximal end portion of the branch pipe member is brought into contact with the peripheral edge portion of the branch pipe through hole formed in the main pipe and is sandwiched between the peripheral edge portion of the branch through hole by the saddle member. The branch pipe joint according to any one of claims 1 to 4, wherein the flange portion is integrally provided.   The base end portion of the branch pipe member is in contact with both longitudinal end edges of the branch pipe through hole formed in the main pipe, and is connected to the peripheral edge portion of the branch through hole by the saddle member. The branch pipe joint according to any one of claims 1 to 4, wherein a plurality of engaging piece portions sandwiched therebetween are provided at intervals.   The branch pipe joint according to any one of claims 1 to 7, wherein a tip branch portion of the branch pipe member is formed of a bendable cylindrical member.   The branch pipe joint according to claim 8, wherein the cylindrical member is configured by a flexible pipe member, and is configured to be bendable from the vicinity of the base end portion inside the saddle member. .

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