JP2006132756A - Branch pipe joint, and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a branch pipe joint which is excellent in its appearance and the water tightness, and further to provide its manufacturing method. <P>SOLUTION: The branch pipe joint 1 for connecting the branch pipe to a main pipe from the direction almost perpendicular to the main pipe comprises a main cylinder element 2 which has an aperture hole 10 formed on the side portion thereof and can be connected to the main pipe, a main cover element 3 which has an aperture hole 16 having the diameter larger than that of the aperture hole 10 formed at the position corresponding to that of the aperture hole 10 formed on the side portion and has the inside diameter nearly equal to the outside diameter of the main cylinder element 2, and into which the main cylinder element 2 is inserted, a branch cylinder element 4 which is connected to the main cylinder element 2 in the direction almost perpendicular to the main cylinder element 2 in the state communicated by the aperture hole 10 and can be connected to the branch pipe, and a branch cover element 5 which has an inside diameter nearly equal to the outside diameter of the branch cylinder element 4, and into which the branch cylinder element 4 is inserted. A joining portion 23 for joining the branch cylinder element 4 to the main cylinder element 2 is provided on one end of the branch cylinder element 4. The joining portion 23 has a flange 26 having an abutting surface 28 formed along the outer peripheral surface 17 of the aperture hole 10. The branch cylinder element 4 is fixed to the main cylinder element 2 by bringing the abutting surface 28 into contact with the outer peripheral surface 17. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a branch pipe joint for connecting a branch pipe that branches in a substantially vertical direction with respect to a main pipe, and a manufacturing method thereof.

  For example, in a building such as a condominium, a metal pipe may be used as a piping material for draining rainwater. Since such metal pipes generally have a cylindrical shape whose axis is a straight line, for example, when a horizontally extending branch pipe is joined to a vertically standing main pipe, it is substantially perpendicular to the main pipe. In order to connect a branch pipe that branches, a T-shaped branch pipe joint has been devised (see, for example, Patent Document 1).

  In the branch pipe joint (T-tube for rain gutter) described in Patent Document 1, an opening hole is formed in the side portion of the main body, and a flange portion is formed in the outer periphery of one end of the horizontal tube. Then, the horizontal tube is fixed perpendicularly to the main body by spot welding with the flange portion brought into contact with the inner peripheral surface of the opening hole. By connecting the main pipe to the main body and the branch pipe to the horizontal pipe, the branch pipe is connected in a direction substantially perpendicular to the main pipe.

  However, when the horizontal pipe is joined to the main body by welding like the branch pipe joint described in Patent Document 1, the weld mark is easily seen from the outside and is inferior in appearance. In addition, since it is not easy to reliably obtain the water tightness at the joint portion, when mass-producing such a branch pipe joint, the yield may be deteriorated due to the lack of water tightness. Furthermore, if welding work including such watertightness consideration is required, workability and workability are not good.

On the other hand, in order to eliminate such welding problems, for example, it is conceivable to form a branch pipe joint by casting such as aluminum die casting. However, according to casting, a surface with uniform color and texture can be obtained. However, there are problems in appearance.
JP 2000-27389 A

  This invention is made | formed in view of such a problem, and makes it a subject to provide the branch pipe joint which was good-looking and excellent in water-tightness, and its manufacturing method.

  In order to solve such a problem, the invention described in claim 1 is a branch pipe joint for connecting a branch pipe from a substantially vertical direction to the main pipe, and an internal hole is formed in a side portion. An outer hole larger than the inner hole is formed at a position corresponding to the inner hole on the side part and a main body connectable to the main pipe, and has an inner diameter substantially the same as the outer diameter of the main body. A cylindrical main cover body into which the main cylinder body is inserted, and a branch cylinder body that is connected to the main cylinder body in a substantially vertical direction and is connected to the branch pipe while being communicated with the inner hole. And a cylindrical branch cover body having an inner diameter substantially the same as the outer diameter of the branch cylinder and into which the branch cylinder is inserted, and the main cylinder is attached to one end of the branch cylinder A joint for connecting, the joint has a flange formed with a contact surface along the outer peripheral surface of the internal hole; Serial abutting surface and the outer circumferential surface and said branch pipe joint said branched tubular body to the present tubular member abuts is fixed.

According to a second aspect of the present invention, in the branch pipe joint according to the first aspect, the joint portion has a peripheral wall that enters while contacting the internal hole, and a concave portion is formed in the peripheral wall. A convex portion is formed at a position corresponding to the concave portion on the inner surface of the cylindrical body, and the concave portion and the convex portion are fitted to each other.

  The invention according to claim 3 is a method of manufacturing a branch pipe joint for connecting a branch pipe from a substantially vertical direction to the main pipe, and is provided at a side portion of the main cylinder connectable to the main pipe. Forming a hole, and forming an outer hole larger than the inner hole at a position corresponding to the inner hole in a side portion of the cylindrical main cover body having an inner diameter substantially the same as the outer diameter of the main cylinder, The main cylinder is inserted into the main cover body, and a flange formed with a contact surface along the outer peripheral surface of the inner hole is provided at one end of the branch cylinder connectable to the branch pipe, and the contact surface A cylinder having an inner diameter substantially the same as the outer diameter of the branch cylinder, wherein the branch cylinder is connected to the main cylinder in a substantially vertical direction in contact with the outer peripheral surface and in communication with the inner hole. A branch pipe joint manufacturing method in which the branch cylinder is inserted into a cylindrical branch cover body.

  According to the invention according to any one of claims 1 to 3, the joining portion is provided at one end of the branch cylinder, and the joining portion is a flange having a contact surface along the outer peripheral surface of the internal hole. And the abutting surface and the outer peripheral surface come into contact with each other and the branch cylinder is fixed to the main cylindrical body, so that the abutting surface and the outer peripheral surface come into surface contact. If an adhesive or the like is applied to the contact surface or the like, the branch cylinder can be easily bonded and fixed to the main cylinder without being welded as in the conventional branch pipe joint. Therefore, it is possible to connect the branch pipe to the main pipe while maintaining a good and clean appearance without being visually recognized from the appearance such as a welding mark. Moreover, since the outer peripheral surface of the inner hole is sealed over the entire circumference by the flange, the watertightness at the joint portion between the main cylinder and the branch cylinder is excellent.

  Furthermore, according to invention of Claim 2, a junction part has the surrounding wall which approachs, contacting an internal hole, A position corresponding to the recessed part of the inner surface of this cylinder while a recessed part is formed in a surrounding wall Since the convex part is formed in the concave part and the convex part, the branched cylindrical body can be more firmly joined to the main cylindrical body, and the peripheral wall can be inserted into the inner hole. It also becomes positioning.

  Embodiments of the present invention will be described below with reference to the drawings.

  1 and 2 show a branch pipe joint according to an embodiment of the present invention. The branch pipe joint 1 has a substantially T-shape and is used to connect a branch pipe (not shown) from a substantially vertical direction to the main pipe (not shown). Here, a case where a branch pipe that extends horizontally is joined to a main pipe that stands vertically will be described as an example. The branch pipe joint 1 includes a main cylinder body 2, a main cover body 3, a branch cylinder body 4, a branch cover body 5, and three adapters 6.

  The cylindrical body 2 is made of resin and has a cylindrical shape with a substantially uniform thickness and diameter. At both upper and lower ends, annular grooves 9 are formed on the outer surface of the peripheral wall 7, and the adapter 6 is connected to the annular groove 9. (See FIG. 4). Further, an opening hole (internal hole) 10 having a diameter substantially the same as the diameter of the branch cylinder 4 is formed on the side of the peripheral wall 7 of the cylinder 2. As shown in FIG. 3, the opening hole 10 has a circular shape when viewed from the front of the opening, and is a hole that is notched deeper toward the center in the vertical direction and has a concave shape when viewed from the side of the opening. In addition, on the inner surface of the peripheral wall 7, two protrusions (convex portions) 12 facing each other are extended in a direction perpendicular to the axial direction of the cylindrical body 2 at a substantially central position in the vertical direction of the opening hole 10. Yes.

The main cover body 3 has a cylindrical shape made of metal and has an inner diameter substantially the same as the outer diameter of the main cylinder body 2. In addition, an opening hole (external hole) 16 that is slightly larger than the opening hole 10 is formed at a position corresponding to the opening hole 10 on the side portion of the peripheral wall 15 of the cover body 3. The main body 2 is inserted into the inside of the main cover body 3, the opening hole 10 and the opening hole 16 are aligned, and the outer peripheral surface 17 of the opening hole 10 faces the outside from the opening hole 16. . Further, an adapter 6 connected to the main body 2 is also inserted into the main body 3. That is, the connecting portion between the cylinder 2 and the adapter 6 is covered by the cover 3.

  The branch cylinder 4 is made of resin and has a cylindrical shape with the same thickness and diameter as the main cylinder 2, and at one of the left and right ends (the left end in FIGS. 1 and 2) of the peripheral wall 20. An annular groove 22 is formed on the outer surface, and the adapter 6 is fitted on the annular groove 22 (see FIG. 4). On the other hand, the other end (one end, the right end in FIGS. 1 and 2) is integrally provided with a joint 23 for connection to the cylinder 2.

  The joint portion 23 includes a flange 26 that goes around the outer surface of the peripheral wall 20 of the branch cylinder 4, and a peripheral wall protrusion (peripheral wall) 27 that protrudes in the axial direction of the branch cylinder 4. The flange 26 is formed so as to protrude along the outer peripheral surface 17 of the opening hole 10, that is, toward the center in the vertical direction of the flange 26, and the axially outer surface of the branch cylinder 4 of the flange 26 is formed on the branch cylinder 4. Is a contact surface 28 that contacts the outer peripheral surface 17 of the opening hole 10 by, for example, mating contact or the like. Further, the peripheral wall protrusion 27 has an outer diameter substantially the same as the diameter of the opening hole 10 of the main body 2, and corresponds to the two protrusions 12 (a position at the substantially central position in the vertical direction of the peripheral wall protrusion 27. ) Are respectively formed with slits (recesses) 29.

  The branch cylinder 4 is connected to the main cylinder 2 in a substantially vertical direction through the joint 23 in a state where the branch cylinder 4 communicates with the opening hole 10. That is, the joining portion 23 is aligned with the opening hole 10, the peripheral wall protrusion 27 enters while contacting the opening hole 10, and the protrusion 12 is fitted into the slit 29. Further, the contact surface 28 of the flange 26 contacts the outer peripheral surface 17 of the opening hole 10 and adheres to the surface, and the flange 26 seals the periphery of the opening hole 10. By the way, the outer surfaces of the flange 26 and the main cover body 3 and the flange 26 and the branch cover body 5 are flush with each other.

  The branch cover body 5 is made of metal, has one end formed in a cylindrical shape formed along the back surface 33 of the contact surface 28 of the flange 26, and has an inner diameter substantially the same as the outer diameter of the branch cylinder body 4. ing. Further, the thickness of the branch cover body 5 is substantially the same as the thickness of the main cover body 3. A branch cylinder 4 and an adapter 6 connected to the branch cylinder 4 are inserted into the branch cover body 5. That is, the connecting portion between the branch cylinder 4 and the adapter 6 is covered by the branch cover body 5.

  The adapter 6 has a cylindrical shape made of resin and has a diameter substantially the same as the diameter of the main cylinder 2 and the branch cylinder 4. At one end, an annular groove 36 is formed on the inner surface of the peripheral wall 34, and the annular groove 36 is fitted with the annular groove 9 of the main cylinder 2 or the annular groove 22 of the branch cylinder 4, so that the main cover 3 Alternatively, the main body 2 or the branch cylinder 4 is connected to the inside of the branch cover body 5. At this time, the length of the adapter 6 is set so that the other end of the adapter 6 protrudes from the end of the main cover 3 or the end of the branch cover 5. The other end protruding to the outside serves as a connecting portion 37, and a main pipe or a branch pipe is fitted around the connecting portion 37, and the adapter 6 connects the main cylinder 2 and the main pipe, or the branch cylinder 4 and the branch pipe. It comes to connect.

In order to assemble the branch pipe joint 1, first, the annular grooves 36 of the adapter 6 are fitted on the annular grooves 9 at both ends of the main body 2, respectively, and the adapter 6 is connected to the main body 2. Next, the adapter 6 connected to the main body 2 is inserted into the main cover body 3 and aligned so that the opening hole 10 of the main body 2 faces the opening hole 16 of the main body 3. Do. Then, the joint portion 23 of the branch cylinder 4 is aligned with the opening hole 10, and the peripheral wall projection of the joint portion 23 is continued until the contact surface 28 of the flange 26 of the joint portion 23 contacts the outer peripheral surface 17 of the opening hole 10. The part 27 is inserted into the opening hole 10 and the slit 29 and the protrusion 12 are fitted. Then, the contact surface 28 and the outer peripheral surface 17 are brought into contact with each other. At this time, for example, an adhesive or the like is preliminarily applied to the surface of the joining portion 23 that contacts the main cylinder 2 and the main cover 3, such as the contact surface 28, and thereby the branch cylinder 4 is connected to the main cylinder 2. Glue firmly and fix almost vertically.

  Next, the annular groove 36 of the adapter 6 is fitted on the annular groove 22 of the branch cylinder 4 to connect the adapter 6 to the branch cylinder 4. In this state, the branch cylinder 4 and the connected adapter 6 are inserted into the branch cover body 5 until the branch cover body 5 contacts the back surface 33 of the contact surface 28 of the flange 26, and the branch cover body 5 is inserted. The branch cylinder 4 is covered. At this time, an adhesive or the like is applied to the back surface 33 in advance, and the branch cylinder 4 and the branch cover body 5 are firmly bonded and fixed. In this way, the branch pipe joint 1 is assembled as shown in FIG.

  In the branch pipe joint 1 according to this embodiment, a joint portion 23 is provided at one end of the branch cylinder 4, and the joint portion 23 is a flange 26 in which a contact surface 28 along the outer peripheral surface 17 of the opening hole 10 is formed. Since the abutting surface 28 and the outer peripheral surface 17 are in contact with each other and the branch cylinder 4 is fixed to the main cylinder 2, the abutting surface 28 and the outer peripheral surface 17 are in surface contact. If an adhesive or the like is applied to the contact surface 28 or the like, the branch cylinder 4 can be easily bonded and fixed to the main cylinder 2 without welding as in the conventional branch pipe joint. Therefore, it is possible to connect the branch pipe to the main pipe while maintaining a good and clean appearance without being visually recognized from the appearance such as a welding mark. Further, since the outer peripheral surface 17 of the opening hole 10 is sealed over the entire circumference by the flange 26, the watertightness at the joint portion between the main cylinder 2 and the branch cylinder 4 is excellent.

  Further, the joint portion 23 has a peripheral wall protrusion 27 that enters while contacting the opening hole 10, and a slit 29 is formed in the peripheral wall protrusion 27 and a position corresponding to the slit 29 on the inner surface of the cylindrical body 2. Since the ridge 12 is formed in the slit and the slit 29 and the ridge 12 are fitted to each other, the branch cylinder 4 can be more firmly joined to the main cylinder 2 and the peripheral wall protrusion 27 can be joined. Is also positioned when inserted into the opening 10.

  The present invention is not limited to the above-described embodiment. For example, in the present embodiment, the joint portion 23 has been described as being integrally formed with the branch cylindrical body 4, but the present invention is not limited thereto. For example, the joint portion may be a separate body from the branch cylinder. For example, it is possible to improve the fireproof performance and the bonding strength by making the bonding part a metal separately.

  Moreover, although this cylinder 2 and the adapter 6 and the branch cylinder 4 and the adapter 6 were demonstrated as a different body in this Embodiment, respectively, these may be formed integrally. However, since it is a separate body in the present embodiment, the mold for injection molding of the main cylinder 2 and the branch cylinder 4 can be small, and the adapter 6 is smaller than the main cylinder 2 and the branch cylinder 4. Since the versatility is high, the manufacturing cost can be reduced as a whole.

It is a perspective view of a branch pipe joint concerning an embodiment of the invention. It is a disassembled perspective view of the branch pipe coupling of FIG. It is the figure which expanded and showed the junction part of the main cylinder and branch cylinder of the branch pipe coupling of FIG. It is sectional drawing in the AA position of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Branch pipe joint 2 This cylinder 3 This cover body 4 Branch cylinder 5 Branch cover body 10 Opening hole (internal hole)
12 ridges (convex parts)
16 Opening hole (external hole)
17 outer peripheral surface 23 joint 26 flange 27 peripheral wall protrusion (peripheral wall)
28 Contact surface 29 Slit (recess)

Claims (3)

A branch joint for connecting a branch pipe from a substantially vertical direction to the main pipe,
An inner hole is formed in the side part and can be connected to the main pipe, and an outer hole larger than the inner hole is formed at a position corresponding to the inner hole in the side part. A cylindrical book cover body having an inner diameter substantially the same as an outer diameter and into which the main cylinder body is inserted, and connected to the main cylinder body in a substantially vertical direction while being communicated with the inner hole, and the branch A branch cylinder connectable to a pipe, and a cylindrical branch cover body having an inner diameter substantially the same as the outer diameter of the branch cylinder, into which the branch cylinder is inserted,
One end of the branch cylinder is provided with a joint for connecting to the main cylinder, and the joint includes a flange having a contact surface along the outer peripheral surface of the internal hole. A branch pipe joint, wherein a contact surface and the outer peripheral surface come into contact with each other to fix the branch tube to the main tube. In the branch pipe joint according to claim 1,
The joint portion has a peripheral wall that enters while contacting the internal hole, and a concave portion is formed in the peripheral wall, and a convex portion is formed at a position corresponding to the concave portion of the inner surface of the main body, A branch pipe joint in which a concave portion and the convex portion are fitted. A method of manufacturing a branch pipe joint for connecting a branch pipe from a substantially vertical direction to a main pipe,
An inner hole is formed in a side portion of the main cylinder that can be connected to the main pipe, and a side portion of the cylindrical main cover body having an inner diameter substantially the same as the outer diameter of the main cylinder is larger than the inner hole. Forming an outer hole at a position corresponding to the inner hole, inserting the main cylinder into the main cover body;
A flange formed with a contact surface along the outer peripheral surface of the inner hole is provided at one end of a branch cylinder connectable to the branch pipe, and the contact surface and the outer peripheral surface are contacted to communicate with each other through the inner hole. In this state, the branch cylinder is connected to the main cylinder in a substantially vertical direction,
A method for manufacturing a branch pipe joint, wherein the branch cylinder is inserted into a cylindrical branch cover body having an inner diameter substantially the same as the outer diameter of the branch cylinder.

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