JP5023105B2 - Vent pipe fittings - Google Patents

Description

  The present invention relates to a vent pipe joint that connects a lower vent pipe branched upward from a drain pipe arranged in a floor and an upper vent pipe arranged in a wall.

  Conventionally, drain pipes used in detached houses have been installed with a vent pipe fitted with an intake valve at the tip to protect the sealing part (trap) of drainage equipment and ensure smooth drainage. Yes. In recent years, in order to make the living space as wide as possible, the wall may be made as thin as possible. In such a case, the space for installing the vent pipe becomes narrow, so the joint for the vent pipe divided into a plurality of parts The structure which connects the lower ventilation pipe branched from the drain pipe in the underfloor and the upper ventilation pipe arrange | positioned in the wall by connecting each other in the underfloor is proposed (for example, refer patent document 1). .

  However, even when the wall is thinned, the minimum thickness is actually secured in consideration of the strength of the housing, so there is actually no strict requirement for the diameter of the vent pipe installed in the wall. It is.

JP 7-268922 A (page 2-4, FIG. 2)

  Similarly, in order to take a large living space, it is attempted not to install a so-called soft wall, but in this case, in order to pass a ventilation pipe from under the floor into the wall, Or it is necessary to form a notch in a horizontal member such as a beam.

  However, due to the stricter requirements for the strength of the frame due to the revision of the Building Standards Law, the standards for the notches formed in the horizontal members have become stricter, and the conventional method allows the ventilation pipe to pass through the wall from under the floor. Causes a problem that a protruding portion is formed on the indoor side.

  This invention is made | formed in view of such a point, and it aims at providing the coupling for vent pipes which can ensure sufficient air permeability, suppressing the protrusion to the indoor side.

  The vent pipe joint according to claim 1 is a vent pipe joint that connects a lower vent pipe branched upward from a drain pipe arranged under the floor and an upper vent pipe arranged in a wall, A circular lower connection port connected to the lower vent pipe, a circular upper connection port connected to the upper vent pipe, a flat part formed in a flat shape, and the flat part from the lower connection port side A lower flat connecting portion that gradually flattens toward the side and communicates the lower connecting port and the flat portion, and the upper connecting port and the flat portion that are gradually flattened from the upper connecting port side to the flat portion side. And a flat pipe line portion having a ventilation area equal to or larger than the ventilation area of the lower ventilation pipe.

The vent pipe joint according to claim 2 is the vent pipe joint according to claim 1, wherein the flat portion is formed in a flat circular shape, and the upper limit dimension of the notched portion of the horizontal member to be arranged is a × b × w , The short side is smaller than a × b / √ (a ² + b ² ), and the long side is smaller than w.

  The vent pipe joint according to claim 3 is the vent pipe joint according to claim 1 or 2, wherein the lower connection port side and the upper connection port side are divided from each other by a flat portion, and one is fitted to the other. It can be connected.

  According to the first aspect of the present invention, the lower flat connection part gradually flattenes from the lower connection port side to the flat part side, and the upper flat connection part gradually flattenes from the upper connection port side to the flat part side. By connecting the flat part to the lower connection port and the upper connection port, the flat part can be installed at the notch of the horizontal member, etc., so that protrusion to the indoor side can be suppressed and the ventilation area of the flat pipe part can be reduced. Sufficient air permeability can be ensured by setting it to be equal to or larger than the ventilation area of the lower ventilation pipe.

  According to invention of Claim 2, it can be set as the shape completely accommodated in the notch part of a horizontal member, and it does not protrude to the indoor side from a floor surface and a wall surface.

  According to the invention described in claim 3, even after the divided lower connection port side is connected to the lower vent pipe previously piped to the lower floor side at the time of construction and the floor surface is formed after that, the divided Since the upper connection port side and the lower connection port side can be fitted and connected, the workability is improved.

It is a vertical side view which shows the joint vicinity for ventilation pipes of one embodiment of this invention. It is a front view which shows the coupling pipe vicinity vicinity same as the above. It is sectional drawing which shows the flat part of the joint for vent pipes same as the above. It is explanatory sectional drawing which shows typically a part of drainage installation which installed the coupling for vent pipes same as the above.

  Hereinafter, the configuration of an embodiment of the present invention will be described with reference to FIGS.

  In FIG. 1, reference numeral 11 denotes a vent pipe joint. The vent pipe joint 11 is used for a drainage facility 15 such as a toilet installed in a room 14 of a building 13 as shown in FIG. .

  Here, the drainage facility 15 includes a trap (not shown), and a drain outlet 21 located at the lower end of the trap is connected to a drain pipe 24 via an elbow 22 and cheese 23. This drain pipe 24 is piped to the lower part of the floor surface 26, that is, the underfloor 27, and extends between the outer wall 28 and the inner wall 29 located on the underfloor 27 side, that is, along the pipe shaft 32 defined in the wall 31. It is plumbed vertically. A lower vent pipe 35 is branched upward in the drain pipe 24, and the lower vent pipe 35 is partitioned into a wall interior 31 above the floor 26 via the vent pipe joint 11. An upper vent pipe 37 piped in the section 36 is connected to the upper vent pipe 37, and an intake valve 38 is attached to the upper end of the upper vent pipe 37 to protect the trap water.

  As shown in FIGS. 1 and 2, the vent pipe joint 11 is divided into a lower joint body 41 serving as a fitting portion and an upper joint body 42 serving as a fitted portion, and these joint bodies 41 and 42 are connected to each other. It is configured to be possible, and is inserted into a notch 44 that is partially cut out at the corner of the upper end on the chamber 14 side of a horizontal member 43 such as a base under the floor 27. The vent pipe joint 11 is generally formed vertically symmetrically as a whole. In other words, the shape of the vent pipe joint 11 has no vertical directionality.

  The lower joint body 41 is formed, for example, by blow molding a synthetic resin such as hard polyvinyl chloride. The lower joint body 41 includes a cylindrical lower connection portion 46 into which the upper end portion of the lower vent pipe 35 is inserted and connected, and a flat portion 47 having an elliptical cross section (FIG. 3) flat in the left-right direction. Are integrally connected by a lower flat connecting portion 48.

  The lower connection portion 46 has a circular lower connection port 51 formed at the lower end portion, and an upper end portion of the lower vent pipe 35 on the inner peripheral side of the continuous portion with the lower flat connection portion 48 that is the upper end portion. A lower positioning step portion 52 for positioning the lower joint body 41 with respect to the lower vent pipe 35 by contacting is formed in a step shape.

  The lower connection port 51 has an inner diameter dimension into which the lower ventilation pipe 35 is inserted and fitted. That is, the inner diameter dimension of the lower connection port 51 is set substantially equal to the outer diameter dimension L1 of the lower vent pipe 35.

  The lower positioning step 52 is formed so that the inner peripheral surface of the lower vent pipe 35 inserted into the lower connection port 51 and the inner peripheral surface of the lower flat connection portion 48 are smoothly continuous without a substantial step. It is formed in a width dimension substantially equal to the wall thickness.

  The flat portion 47 is inserted into the notch 44 of the horizontal member 43, the lower side is located on the side of the horizontal member 43, and the upper side is located in the space 36 above the horizontal member 43. It is formed in a shape. Further, as shown in FIG. 3, the flat portion 47 has a curved portion 47a curved in an arc shape on both sides as shown in FIG. 3, and a straight portion 47b between the curved portions 47a and 47a is not curved.

  Here, the dimensions of the flat portion 47 are as follows when the vertical dimension of the notch 44 is a, the depth dimension is b, and the width dimension is w as shown in FIG. That is, when the upper limit dimension of the notch 44 is a × b × w, the maximum value of the short dimension c is expressed by the following equation.

c = a × b / √ (a ² + b ² )

  That is, the short dimension c of the flat portion 47 is equal to or shorter than the shortest distance between the corner portion 26a on the lower end side of the floor surface 26 and the inclined surface 44a of the notched portion 44 of the horizontal member 43 shown in FIG. The short dimension c is set smaller than the outer diameter dimension L1 of the lower ventilation pipe 35 and the outer diameter dimension L2 of the upper ventilation pipe 37.

  Further, the width dimension, that is, the longitudinal dimension d of the flat portion 47 is set to a dimension equal to or smaller than the width dimension w of the notch portion 44 and larger than the outer diameter dimension L1 of the lower vent pipe 35 as shown in FIG. ing.

  Therefore, as shown in FIG. 1, the flat portion 47 has a size that can be fitted to the notch portion 44. In other words, the flat portion 47 extends the notch 44 into the horizontal member without expanding the space by projecting the floor 26 upward in the chamber 14 or projecting the inner wall 29 into the chamber 14. It is possible to arrange only by forming in 43.

  Further, the ventilation area, that is, the cross-sectional area of the flat portion 47 is set to be equal to or greater than the ventilation area, that is, the cross-sectional area of the lower ventilation pipe 35, in other words, the cross-sectional area on the lower connection portion 46 side of the lower flat connection portion 48.

  The upper end portion of the flat portion 47 serves as an insertion opening that is inserted into and connected to the upper joint body 42.

  Further, the lower flat connecting portion 48 is gradually and continuously deformed from the lower connecting portion 46 side to the flat portion 47. That is, the cross section of the lower flat connecting portion 48 is deformed so as to gradually increase in the width direction and decrease in the vertical direction from the circular shape to the oval shape from the lower side to the upper side.

  On the other hand, the upper joint body 42 is formed, for example, by blow molding a synthetic resin such as hard polyvinyl chloride. The upper joint body 42 includes a flat portion connecting portion 55 into which the upper end portion of the flat portion 47 is inserted and connected, and a cylindrical upper connecting portion 56 into which the lower end portion of the upper vent pipe 37 is inserted and connected. Are integrally connected by an upper flat connecting portion 57.

  The flat portion connecting portion 55 has a connection opening 61 serving as a receiving port for receiving the upper end portion of the inserted flat portion 47 formed at the lower end portion, and the upper end portion of the inserted flat portion 47 and the upper end portion. A positioning portion 62 is formed that contacts and positions the upper joint body 42 (flat portion 47) with respect to the flat portion 47 (upper joint body 42). That is, the flat portion connecting portion 55 and the connection opening 61 are each formed in an oval shape.

  The connection opening 61 has an inner dimension into which the flat portion 47 is inserted and fitted. That is, the inner dimension of the connection opening 61 is set substantially equal to the outer dimension of the flat part 47. Accordingly, the connection opening 61 has a short dimension c and a long dimension d.

  The positioning portion 62 is substantially the same as the thickness of the flat portion 47 so that the inner peripheral surface of the flat portion 47 inserted into the connection opening 61 and the inner peripheral surface of the upper flat connection portion 57 are smoothly continuous without any step. They are formed with equal width dimensions.

  Further, the upper connection portion 56 has a circular upper connection port 65 formed at the upper end portion, and the lower end of the upper vent pipe 37 on the inner peripheral side of the continuous portion with the upper flat connection portion 57 as the lower end portion. An upper positioning step portion 66 for positioning the upper joint main body 42 with respect to the upper vent pipe 37 in contact with the upper portion is formed in a step shape.

  The upper connection port 65 has an inner diameter dimension into which the upper ventilation pipe 37 is inserted and fitted. That is, the inner diameter dimension of the upper connection port 65 is set substantially equal to the outer diameter dimension L2 of the upper vent pipe 37. Furthermore, the upper connection port 65 has a diameter dimension substantially equal to that of the lower connection port 51, for example.

  The upper positioning step portion 66 is formed so that the inner peripheral surface of the upper vent pipe 37 inserted into the upper connection port 65 and the inner peripheral surface of the upper flat connection portion 57 are smoothly continuous without substantially steps. It is formed in a width dimension substantially equal to the wall thickness.

  The upper flat connecting portion 57 is gradually and continuously deformed from the flat portion connecting portion 55 side which is the flat portion 47 side to the upper connecting portion 56 side. That is, the cross-sectional shape of the upper flat connecting portion 57 is deformed so as to gradually decrease in the width direction and increase in the vertical direction from an oval shape to a circular shape from the lower side to the upper side. Further, the upper flat connecting portion 57 is formed substantially symmetrically with the lower flat connecting portion 48. The flat portion 47, the lower flat connecting portion 48, and the upper flat connecting portion 57 constitute a flat duct portion 68. Therefore, the flat pipe line portion 68 has a ventilation area larger than the ventilation area of the lower ventilation pipe 35 and the upper ventilation pipe 37.

  Next, a construction method for the drainage facility according to the embodiment will be described.

In the present embodiment, for example, VU pipes having a nominal diameter of φ40 are used as the vent pipes 35 and 37, and the size of the notch 44 is 30 mm × 30 mm × 100 mm. At this time, the flat portion 47 of the vent pipe joint 11 has a short dimension of 21.2 mm (<30 × 30 / √ (30 ² +30 ² ) ≈21.21 mm) and a width dimension of 80 mm (<100 mm). The cross-sectional area on the inner peripheral side of the flat portion 47 was set to be equal to the cross-sectional area on the inner periphery of the VU pipe having a nominal diameter of φ40. In addition, each joint body 41, 42 is molded with each connection port 51, 65, flat portion 47, etc. so that a VP pipe having a nominal diameter of φ30 can be connected to a VU pipe having a nominal diameter of φ40 by a blow molding method. did.

  Then, for example, before the inner wall 29 is formed in the building 13, as shown in FIG. 4, the upstream end of the drain pipe 24 is connected to the drain outlet 21 of the trap of the drainage facility 15 installed in the room 14 of the building 13. Connect liquid tightly.

  After this, the drain pipe 24 is horizontally piped along the under floor 27 of the building 13 through the elbow 22 and the cheese 23 in order, and then the pipe shaft 32 is inserted and piped downward.

  Next, the lower vent pipe 35 is connected to the upper end of the cheese 23 of the drain pipe 24, and the lower connection port 51 of the lower joint body 41 of the vent pipe joint 11 is connected to the upper end of the lower vent pipe 35 as shown in FIG. The lower vent pipe 35 and the lower joint body 41 are hermetically fixed with an adhesive or the like with the upper end of the lower vent pipe 35 being in contact with the lower positioning step 52.

  In the lower joint body 41, the flat portion 47 is inserted into the notched portion 44 of the horizontal member 43 and is positioned above the horizontal member 43 and toward the chamber 14 side of the outer wall 28.

  Further, after the floor surface 26 is installed, the connection opening 61 of the upper joint body 42 is attached to the upper end portion of the flat portion 47, and the upper joint portion 42 is in contact with the positioning portion 62 with the upper end portion of the flat portion 47 in contact with the positioning portion 62. The main body 42 and the lower joint main body 41 are hermetically fixed with an adhesive or the like.

  Thereafter, the lower end portion of the upper vent pipe 37 having the intake valve 38 (FIG. 4) attached to the upper end portion is inserted into the upper connection port 65 of the upper joint body 42, and the lower end portion of the upper vent pipe 37 is inserted into the upper positioning step. The upper joint main body 42 and the upper vent pipe 37 are hermetically fixed with an adhesive or the like in a state of being in contact with the portion 66.

  Then, by forming the inner wall 29 so as to face the outer wall 28, the upper ventilation pipe 37 is accommodated in the space portion 36 between the inner wall 29 and the outer wall 28.

  Note that the procedure for assembling the vent pipe joint 11 can be appropriately changed according to the actual construction procedure of the building 13.

  Then, when drainage is suddenly drained from the drainage facility 15 shown in FIG. 4, the atmospheric pressure inside the drainage pipe 24 decreases below the atmospheric pressure, so that the atmospheric pressure and the pressure inside the drainage pipe 24 are reduced. Due to the difference, the intake valve 38 opens and external air flows into the upper vent pipe 37. This air flows into the drain pipe 24 through the vent pipe joint 11 and the lower vent pipe 35, thereby The pressure in the pipe 24 is prevented from decreasing, and the sealed water in the trap of the drainage facility 15 is prevented from being sucked out into the drain pipe 24. The intake valve 38 is closed when the pressure inside the drain pipe 24 returns to the atmospheric pressure.

  As described above, according to the above-described embodiment, the lower flat connection portion 48 that gradually flattens from the lower connection port 51 side to the flat portion 47, and the upper connection port 65 side gradually to the flat portion 47 side. By connecting the flat portion 47, the lower connection port 51, and the upper connection port 65 with the flat upper connection portion 57, the vent pipe joint 11 can be installed in the notch portion 44 of the horizontal member 43, etc. The protrusion of the inside of the chamber 14 to the inside can be suppressed, and sufficient ventilation can be ensured by making the ventilation area of the flat pipe line portion 68 equal to or larger than the ventilation area of the lower ventilation pipe 35.

  That is, the vent pipe joint 11 has a flat flat portion 47 that has a flat flat portion 47 and is equal to or larger than the ventilation area of the lower vent pipe 35, so even in a narrow space from the floor 27 to the inside 31 of the wall, The ventilation area (cross-sectional area) of the ventilation path can be maintained, ventilation can be taken while suppressing a decrease in ventilation performance, and the inner surface of the flat duct section 68 becomes a gently curved surface by the flat connection sections 48 and 57. Therefore, ventilation can be effectively taken without disturbing the air flow. Furthermore, by making the connection ports 51 and 65 circular, existing general vent pipes can be used as the vent pipes 35 and 37 as they are, and there is no need to use special vent pipes. Excellent and convenient to use.

Specifically, when the flat portion 47 is formed into a flat circular shape and the reference of the upper limit dimension required by, for example, a housing company of the notch 44 of the horizontal member 43 to be arranged is a × b × w, By making the short side smaller than a × b / √ (a ² + b ² ) and the long side smaller than w, the vent pipe joint 11 is completely in the notch 44 of the horizontal member 43. The vent pipe joint 11 and the like do not protrude from the wall surface of the floor surface 26 and the inner wall 29 to the inside of the chamber 14, and the interior of the chamber 14 can be widened.

  Also, in actual construction sites, as described above, after placing the floor surface 26 after finishing the piping of the floor 27, the piping on the floor is often performed. The upper joint body 42 and the lower joint body 41 are divided into upper and lower parts, and these joint bodies 41, 42 are connected to each other so that they can be connected to each other. Even after the divided lower connection port 51 side, that is, the lower joint body 41 is connected and then the floor surface 26 is formed, the divided upper connection port 65 side, that is, the upper joint body 42 is connected to the lower joint body 41. Since it can be connected by being fitted to the side, workability is improved.

  In particular, since the vent pipe joint 11 is substantially symmetrical in the vertical direction, when installing pipes on the floor after installing the floor 26, it is not necessary to distinguish the upper and lower sides, and the flat part 47 is at the position where the flatness is the largest Since the joint body 41 and the upper joint body 42 are separated, it is not too late to notice after the installation of the floor 26 when piping up and down by mistake, such as reworking. Eliminates labor and improves workability.

  Of course, one of the lower joint body 41 and the upper joint body 42 is a fitting portion and the other is a fitted portion. Even if it is installed, there is no change in that it is not necessary to redo the construction.

  In particular, when the connection position of the lower joint body 41 and the upper joint body 42 is set to a position above the horizontal member 43, the flat portion connecting portion 55 is inclined to the corner portion 26a of the floor surface 26 or the notch portion 44. Construction workability is improved without interfering with the surface 44a.

  In the above-described embodiment, if the lower joint body 41 and the upper joint body 42 are respectively divided at any position of the flat portion 47, any of the fitted parts can be fitted. It may be.

  Further, the lower joint main body 41 and the upper joint main body 42 can be connected by any configuration such as bonding, for example, except that either one is fitted to the other.

  Further, the vent pipe joint 11 may be divided at any position other than the flat portion 47, or may be divided into three or more. Further, the vent pipe joint 11 is not divided and may be integrated.

11 Vent pipe fittings
24 Drain pipe
35 Lower vent pipe
37 Upper vent pipe
43 Horizontal member
44 Notch
47 Flat part
48 Lower flat connection
51 Bottom connection port
57 Upper flat connection
65 Upper connection port
68 Flat duct section

Claims (3)

A joint for a vent pipe connecting a lower vent pipe branched upward from a drain pipe arranged under the floor and an upper vent pipe arranged in a wall,
A circular lower connection port connected to the lower vent pipe;
A circular upper connection port connected to the upper vent pipe;
A flat portion formed in a flat shape, a lower flat connection portion that gradually flattens from the lower connection port side to the flat portion side and communicates the lower connection port and the flat portion, and from the upper connection port side An upper flat connection portion that gradually flattens toward the flat portion side and connects the upper connection port and the flat portion, and has a flat duct portion having a ventilation area that is equal to or larger than the ventilation area of the lower ventilation pipe. This is a joint for vent pipes. The flat portion is formed in a flat circular shape, and when the upper limit dimension of the notched portion of the horizontal member to be arranged is a × b × w, the short side is more than a × b / √ (a ² + b ² ) The vent pipe joint according to claim 1, wherein the joint is small and the longitudinal side is smaller than w. The joint for a vent pipe according to claim 1 or 2, wherein the lower connection port side and the upper connection port side are separated from each other by a flat portion and can be connected by fitting one into the other.

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