JP6191948B2 - Connection structure between drain and eaves and downstream pipe - Google Patents

Description

  The present invention relates to a drain used for connecting an eaves rod and a downstream pipe member, and a connecting structure of the eave rod and a downstream tube member obtained by connecting the eave rod and the downstream pipe member via a drain.

  Patent Document 1 discloses a drain member for connecting an eaves basket and a call bowl. This drain member is comprised by the inner cylinder which has an upper collar and a dust-removal part, and the outer cylinder which has a lower collar. The inner cylinder is inserted into the drainage hole formed in the bottom of the eaves from above. The outer cylinder is screwed into the inner cylinder. As a result, the bottom of the eaves is sandwiched between the lower collar of the outer cylinder and the upper collar of the inner cylinder, and the drain member is attached to the eaves. In addition, the outer cylinder is connected to a call through an elbow, and the call is connected to a call through another elbow.

JP 2000-297504 A

  By the way, the drain member disclosed in Patent Document 1 is attached to the eaves in a state where the axial direction of the outer cylinder is perpendicular to the bottom of the eaves. For this reason, in order to connect a call that is inclined with respect to the vertical direction to the drain member, it is necessary to connect an elbow to the outer cylinder and connect the call to this elbow. However, when the elbow is provided in this way, it is difficult to obtain a simple and good appearance, and there is a concern that the number of members increases, resulting in an increase in cost and time-consuming work.

  The present invention has been made in view of the above circumstances, and provides a drain that can directly connect another downstream pipe intersecting the vertical direction without using a bent pipe such as an elbow, and a connection structure. This is the issue.

Drain of the present invention to solve the above-mentioned problems, which is inserted from above into dropping port formed in the bottom of the eaves gutters, inclined from bottom lower surface of the eaves gutter with respect to a direction perpendicular to the bottom of the eaves gutter An inner cylinder projecting in a direction to be connected, and an outer cylinder body connectable to the outer peripheral side of the projecting portion of the inner cylinder projecting from the bottom lower surface of the eaves bowl and connectable to another downstream pipe. The inner cylindrical body is formed on the inner side of the drop port, an elliptical cylindrical portion, a connecting portion formed on the lower side of the elliptical cylindrical portion, and a lower side of the connecting portion, and the connection And a cylindrical part connected to the elliptical cylindrical part through a part, and a flange part that protrudes to the outer peripheral side and is arranged on the bottom part of the eaves bowl is formed at the upper end part of the elliptical cylindrical part is, the elliptic cylindrical portion sectional shape perpendicular to the axial direction is elliptical and bottom parallel to the cross-sectional shape of the eaves gutter It has a perfect circle shape, the true cylindrical portion has a perfect circular cross-sectional shape perpendicular to the axial direction, a male screw portion is formed on the outer peripheral surface of the true cylindrical portion, and the inner peripheral surface of the outer cylindrical body. A female threaded portion that is threadedly engaged with the male threaded portion, an upper end surface is in contact with a lower surface of a bottom portion of the eaves rod, and a lower end portion is further provided with a cylindrical spacer that is fitted inside the outer cylindrical body, by the bottom of the eaves gutter in parts and the outer tubular member is sandwiched through the spacer, it characterized that you attached to the eaves gutters.

The coupling structure of the eaves gutter and the downstream tubing of the present invention includes a de Len, the drain has an inner cylindrical body which is inserted from above down port formed in the bottom of eaves gutters, the inner tube An outer cylinder that is connectable to the outer peripheral side of a protruding portion that protrudes from the bottom lower surface of the eaves of the eaves, and a cylindrical spacer, and the inner cylinder is an elliptical cylinder that is disposed inside the drop mouth And a connecting part formed on the lower side of the elliptical cylindrical part, a true cylindrical part formed on the lower side of the connecting part and connected to the elliptical cylindrical part via the connecting part, A flange portion protruding outward is formed at the upper end of the elliptic cylindrical portion, and the elliptic cylindrical portion has an elliptical cross-sectional shape perpendicular to the axial direction and is parallel to the bottom portion of the eaves flange The cross-sectional shape is a perfect circle, the cross-sectional shape perpendicular to the axial direction of the true cylindrical portion is a perfect circle, A male screw portion is formed on the surface, a female screw portion is formed on the inner peripheral surface of the outer cylindrical body, the flange portion is disposed on the bottom portion of the eaves ridge, and the inner cylinder body is formed from the bottom lower surface of the eave ridge. Projecting in a direction inclined with respect to the direction perpendicular to the bottom of the eaves, the female threaded portion is screwed into the male threaded portion, the outer cylindrical body is connected to the inner cylindrical body, and the upper end surface of the spacer is the eaves Abutting on the bottom surface of the bottom of the heel, the lower end of the spacer is fitted inside the outer cylinder, the bottom of the eave ridge is sandwiched between the heel and the outer cylinder via the spacer, The drain is attached to the eaves bowl, and a downstream pipe is connected to the outer cylinder .

  In the drain according to the present invention, and the connecting structure of the eaves and the downstream pipe, in the state where the drain is attached to the eaves, the protruding direction of the protruding portion of the inner cylindrical body is a direction perpendicular to the bottom of the eaves Can be inclined with respect to. For this reason, it is possible to directly connect a downstream pipe member such as a caller inclined with respect to a direction perpendicular to the bottom of the eaves without using an elbow. Therefore, the connection structure in which the downstream pipe is connected to the eaves can be made simple and good in appearance. In addition, the number of members can be reduced to suppress an increase in cost, and the labor of construction can be reduced.

It is explanatory drawing which showed the connection structure of the eaves bowl and downstream pipe material of embodiment of this invention in the cross section. It is a disassembled perspective view of the same drain and call. It is the A section enlarged view of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. As shown in FIG. 1, the drain 1 according to the present embodiment connects the eaves rod 2 and the call shaft 3 that is a downstream pipe. In FIG. 1, the eaves 2 is connected to the upper end of the eaves 5 located on the building side of the eaves 2 using the drain 1, the call 3 and the elbow 4.

  Below, each structural member is demonstrated on the basis of the direction in the construction state shown by FIG. That is, the direction shown by D1 in FIG. 1 is assumed to be the front, the direction shown by D2 is the rear, the direction shown by D3 is the upper side, and the direction shown by D4 is the lower side.

  The eaves bowl 2 has a bottom part 20, a front wall part 21, and a rear wall part 22. The front wall portion 21 rises from the front end portion of the bottom portion 20 and is inclined so as to be positioned forward as it extends upward. The rear wall portion 22 rises from the rear end portion of the bottom portion 20 and is substantially perpendicular to the bottom portion 20.

  The eaves 2 is attached to the building with the front wall portion 21 positioned on the outdoor side, the rear wall portion 22 positioned on the building side, and the bottom portion 20 leveled. The eaves ridge 2 is attached to the building by, for example, attaching a plurality of support tools (not shown) to the building in the longitudinal direction of the eave ridge 2 with an interval, and supporting the eave ridge 2 with the plurality of support tools. .

  As shown in FIG. 2, the drain 1 includes an inner cylinder body 6, a spacer 8, and an outer cylinder body 7. The inner cylinder body 6 includes a cylindrical inner cylinder portion 60 and a flange portion 61 that protrudes from the inner cylinder portion 60 to the outer peripheral side.

  The inner cylinder part 60 is composed of an elliptic cylinder part 600, a connection part 601, and a true cylinder part 602. The elliptic cylindrical part 600, the connection part 601, and the true cylindrical part 602 are formed in this order in order toward the downstream side (lower end side in the axial direction).

  The elliptic cylindrical portion 600 has an elliptical shape in which a cross-sectional shape orthogonal to the axial direction is long to the left and right. The upper end surface of the elliptic cylindrical portion 600 is inclined so as to be inclined rearward with respect to the axial direction of the elliptic cylindrical portion 600. A cross-sectional shape (horizontal cross-sectional shape) parallel to the inclined upper end surface of the elliptical cylindrical portion 600 is a perfect circle shape in the axial direction.

  The collar part 61 protrudes from the upper end part of the elliptical cylindrical part 600 toward the outer peripheral side. The collar portion 61 is formed around the upper end portion of the elliptic cylindrical portion 600 and has an annular shape in plan view.

  The flange portion 61 is parallel to the upper end surface of the elliptic cylindrical portion 600 and is inclined with respect to the axial direction of the elliptic cylindrical portion 600. This inclination angle is set so that the flange 61 is parallel to the bottom 20 of the eaves 2 in the construction state shown in FIG. The upper surface of the flange portion 61 is continuous with the upper end surface of the elliptic cylindrical portion 600.

  The inner cylinder part 60 protruding rearward and obliquely downward from the collar part 61 is inserted from above into a drop mouth 200 penetrating vertically formed in the bottom part 20 of the eaves bowl 2. The pit 200 is formed in a horizontal cross section with a circular shape using, for example, a horuseau.

  In the construction state shown in FIG. 1, the protruding proximal end portion of the elliptical cylindrical portion 600 protruding downward from the flange portion 61 is disposed inside the drop opening 200. Further, most of the inner cylindrical portion 60 (portion excluding the upper end portion) is a protruding portion 603 protruding from the lower surface of the bottom portion 20 of the eaves rod 2, and the protruding direction of this protruding portion 603 is orthogonal to the bottom portion 20 of the eaves rod 2. It is inclined with respect to the direction of In addition, the collar portion 61 is disposed along the upper surface of the bottom portion 20 of the eaves cage 2.

  As shown in FIG. 2, the true cylindrical part 602 integrally connected to the elliptical cylindrical part 600 via the connection part 601 has a perfect circular shape in cross-section perpendicular to the axial direction. . The cross-sectional shape perpendicular to the axial direction of the cylindrical connecting portion 601 gradually increases from the elliptical upper end portion connected to the elliptical cylindrical portion 600 to the perfect circular lower end portion connected to the true cylindrical portion 602. It has changed. The central axis of the elliptical cylindrical part 600, the central axis of the connecting part 601 and the central axis of the true cylindrical part 602 are parallel and pass through a substantially coincident part in plan view. On the outer peripheral surface of the true cylindrical portion 602, a male screw portion 604 that is screwed into the outer cylinder 7 is formed.

  The spacer 8 is formed in a cut cylinder shape, and the cross-sectional shape orthogonal to the axial direction is a perfect circle. The upper end surface of the spacer 8 is inclined with respect to the axial direction of the spacer 8. This inclination angle is set so that the upper end surface of the spacer 8 is parallel to the bottom 20 of the eaves 2 in the construction state shown in FIG. The spacer 8 is disposed on the lower side of the eaves 2 with the inclined upper end surface being in contact with the lower surface of the bottom 20 of the eaves 2 around the drop mouth 200.

  A fitting cylinder portion 80 that protrudes toward the lower side in the axial direction of the spacer 8 is formed at the inner peripheral edge of the lower end of the spacer 8. As shown in FIG. 3, the outer peripheral surface of the fitting cylinder portion 80 is smaller in diameter than the outer circumferential surface portion 81 of the portion located on the axially upper side of the fitting cylinder portion 80 of the spacer 8. They are connected via a step surface 82.

  As shown in FIG. 2, the outer cylindrical body 7 is disposed on the upstream side cylindrical portion 70 and on the downstream side (downward in the axial direction) of the upstream side cylindrical portion 70 and is integrally connected to the upstream side cylindrical portion 70. The downstream cylinder part 71 is comprised. The upstream cylindrical portion 70 has a cross-sectional shape orthogonal to the axial direction that is a perfect circle in the axial direction.

A female screw portion 700 is formed on the inner peripheral surface of the upstream side cylindrical portion 70 of the outer cylindrical body 7. As shown in FIG. 1, the outer cylindrical body 7 is connected to the outside of the true cylindrical portion 602 of the inner cylindrical body 6 by screwing the female screw portion 700 with the male screw portion 604.

  Further, as shown in FIG. 1, the fitting cylinder 80 of the spacer 8 is press-fitted into the upper end of the upstream cylinder 70 of the outer cylinder 7. This press-fitting is performed until the upper end surface of the upstream cylindrical portion 70 contacts the stepped surface 82 of the spacer 8. Thereby, the spacer 8 is fixed to the upper end portion of the outer cylindrical body 7. Thus, the outer peripheral surface of the spacer 8 fixed to the upper end portion of the outer cylindrical body 7 is substantially flush with the outer peripheral surface of the upstream cylindrical portion 70 of the outer cylindrical body 7.

  When the spacer 8 is connected to the upper end of the outer cylinder 7 and the male thread 604 of the inner cylinder 6 is screwed into the female thread 700 of the outer cylinder 7 to a sufficient depth, The entire end surface comes into contact with the bottom surface of the bottom portion 20 of the eaves cage 2, and the outer cylinder 7 presses the bottom portion 20 of the eaves cage 2 upward via the spacer 8. At this time, the flange portion 61 of the inner cylinder 6 presses the bottom portion 20 of the eaves rod 2 downward. For this reason, the bottom part 20 of the eaves bowl 2 is vertically sandwiched between the flange part 61 of the inner cylinder body 6 and the spacer 8 provided at the upper end part of the outer cylinder body 7. Thereby, the drain 1 is fixed to the eaves 2. When constructing the drain 1, the outer cylinder 7 is connected to the inner cylinder 6, and the spacer 8 is sandwiched between the bottom 20 of the eaves 2 and the outer cylinder 7, so that the spacer 8 is 7 may be connected. Alternatively, the spacer 8 may be connected to the outer cylinder 7 in advance, and the outer cylinder 7 may be connected to the inner cylinder 6 so that the spacer 8 is sandwiched between the bottom 20 of the eaves 2 and the outer cylinder 7. Good.

  As shown in FIG. 3, the outer peripheral surface of the fitting cylinder portion 80 of the spacer 8 is a tapered surface 800 whose outer diameter decreases toward the lower side in the axial direction of the spacer 8. On the other hand, the inner peripheral surface of the upper end portion into which the fitting cylinder portion 80 is fitted in the upstream cylinder portion 70 of the outer cylinder 7 becomes a tapered surface 701 whose inner diameter increases toward the upper side in the axial direction of the upstream cylinder portion 70. ing. For this reason, the operation | work which press-fits the fitting cylinder part 80 in the upper end part of the upstream cylinder part 70 can be made easy. It should be noted that the outer peripheral surface of the fitting tube portion 80 and the inner peripheral surface of the upper end portion of the upstream tube portion 70 need not be provided with a taper. Further, a tapered surface whose outer diameter increases toward the lower side in the axial direction of the spacer 8 is formed on the outer peripheral surface of the fitting cylindrical portion 80, and the inner peripheral surface of the upper end portion of the upstream cylindrical portion 70 is the upstream cylindrical portion 70. It is good also as a taper surface that an internal diameter becomes small so that it goes to the axial direction upper side. In this case, it is possible to make it difficult to remove the spacer 8 from the outer cylinder 7.

  As shown in FIG. 1, the downstream cylindrical portion 71 of the outer cylindrical body 7 is formed in a cylindrical shape having substantially the same diameter as the inner cylindrical portion 60, and has a smaller diameter than the upstream cylindrical portion 70.

  The inner diameter of the cylindrical calling shaft 3 is substantially the same as the outer diameter of the downstream cylinder portion 71 of the outer cylinder 7. As shown in FIG. 1, the caller 3 is connected to the outer cylinder 7 by fitting its upstream end to the outer peripheral side of the downstream cylinder 71. At this time, the outer peripheral surface of the call shaft 3 is substantially flush with the outer peripheral surface of the upstream side tubular portion 70 of the outer cylindrical body 7. Further, the axial direction of the call 3 is parallel to the axial direction of the downstream side cylinder portion 71. That is, the axial direction of the callout 3 is substantially parallel to the protruding portion 603 of the inner cylinder 6 protruding from the bottom surface of the bottom 20 of the eaves 2.

  As shown in FIG. 1, the elbow 4 has an upstream portion connected to the outside of the downstream end of the caller 3. At this time, the axial direction of the downstream portion of the elbow 4 is parallel to the vertical direction.

  As shown in FIG. 1, the upstream end of the rod 5 is connected to the outside of the downstream portion of the elbow 4. At this time, the axial direction of the eaves 5 is parallel to the vertical direction.

  The drain 1 is attached to the eaves wall 2 as follows, for example. First, an operator forms a spigot 200 using a horuseau or the like at a location where the drain 1 is connected at the bottom 20 of the eaves bowl 2. Next, the operator inserts the inner cylinder portion 60 of the inner cylinder body 6 into the drop mouth 200 from above, and places the flange portion 61 of the inner cylinder body 6 on the bottom portion 20 of the eaves rod 2. Next, the operator inserts the female screw portion 700 of the outer cylinder body 7 into the male screw of the inner cylinder body 6 with the spacer 8 disposed around the inner cylinder body 6 or with the spacer 8 connected to the outer cylinder body 7. The outer cylinder 7 is connected to the inner cylinder 6 by screwing into the portion 604. As a result, the bottom portion 20 of the eaves rod 2 is pressed upward by the outer cylinder body 7 via the spacer 8, and the eaves rod 2 is formed by the flange portion 61 of the inner cylinder body 6 and the spacer 8 provided on the outer cylinder body 7. The bottom 20 is clamped and the drain 1 is attached to the eaves 2.

  In this way, the outer cylinder 7 of the drain 1 attached to the eaves basket 2 is connected to the basket 5 through the callout 3 and the elbow 4. As a result, the rainwater flowing through the eaves basket 2 is discharged to the basket 5 through the inner cylinder 6, the outer cylinder 7, the call bowl 3, and the elbow 4 in this order.

  As described above, the drain 1 of the present embodiment includes the inner cylindrical body 6 that is inserted from above into the drop opening 200 formed in the bottom 20 of the eaves 2 and protrudes from the bottom surface of the bottom 20 of the eaves 2. Yes. The drain 1 has an outer cylinder 7 that can be connected to the outer peripheral side of the protruding portion 603 protruding from the bottom surface of the bottom portion 20 of the eaves bowl 2 of the inner cylinder 6 and can be connected to another downstream pipe material (callout 3). I have. The inner cylinder 6 has a flange portion 61 that protrudes toward the outer peripheral side and is disposed on the bottom portion 20 of the eaves rod 2. The drain 1 is attached to the eaves bowl 2 by sandwiching the bottom part 20 of the eaves bowl 2 between the collar part 61 and the outer cylindrical body 7. And the protrusion direction of the protrusion part 603 of the inner cylinder 6 inclines with respect to the direction orthogonal to the bottom part 20 of the eaves rod 2, It is characterized by the above-mentioned.

  In this drain 1, the inner cylindrical body 6 is inserted into the drop opening 200 of the eaves cage 2 from above, the outer cylindrical body 7 is connected to the inner cylindrical body 6, and the flange 61 and the outer cylindrical body 7 of the inner cylindrical body 6 are connected. The bottom part 20 of the eaves bowl 2 is sandwiched between them so that the eaves bowl 2 can be attached. And in the state which attached the drain 1 to the eaves rod 2 in this way, the protrusion direction of the protrusion part 603 of the inner cylinder 6 can be inclined with respect to the direction orthogonal to the bottom part 20 of the eaves rod 2. FIG. For this reason, the downstream side pipe member inclined with respect to the direction orthogonal to the bottom 20 of the eaves rod 2 can be directly connected to the outer cylinder 7 of the drain 1 without using an elbow. Therefore, the structure in which the downstream pipe is connected to the eaves wall 2 using the drain 1 can be made simple and good in appearance. In addition, the number of members can be reduced to suppress an increase in cost, and the labor of construction can be reduced.

  Further, the drain 1 has an elliptical cylindrical part 600 in which the inner cylindrical body 6 is disposed inside the drop mouth 200 as in the present embodiment, and a cross section perpendicular to the axial direction of the elliptical cylindrical part 600 is formed. It is preferable that the cross section parallel to the bottom portion 20 of the eaves bowl 2 of the elliptic cylindrical portion 600 is elliptical.

  As described above, when the cross section of the elliptical cylindrical part 600 parallel to the bottom 20 of the eaves bowl 2 is made into a perfect circle, the elliptical cylindrical part 600 can be obtained when the drop port 200 of the eaves bowl 2 is made into a perfect circle. The outer peripheral surface of the inner cylindrical body 6 can be secured along the peripheral edge of the drop mouth 200, and a sufficient flow path cross-sectional area of the inner cylinder 6 can be secured. In addition, for example, it takes time to form the non-circular drop mouth 200 at the bottom 20 of the eaves bowl 2. However, since the drop mouth 200 can be made into a perfect circle, the drop mouth 200 can be easily formed using a horuseau or the like. Can be formed.

  Moreover, the connection structure of the eaves rod 2 and the downstream side pipe material of the present embodiment includes the drain 1 including the inner cylinder body 6 and the outer cylinder body 7. The inner cylinder 6 has a flange 61 that protrudes to the outer peripheral side. The inner cylinder 6 is inserted from above into a drop opening 200 formed on the bottom 20 of the eaves 2 and protrudes from the bottom surface of the bottom 20 of the eaves 2. A collar 61 is disposed on the bottom 20 of the eaves 2. The outer cylinder 7 is connected to the outer peripheral side of the protruding portion 603 protruding from the bottom surface of the bottom 20 of the eaves 2 in the inner cylinder 6. The bottom 20 of the eaves 2 is sandwiched between the outer cylinder 7 and the eaves 61, and the drain 1 is attached to the eaves 2. A downstream pipe (callout 3) is connected to the outer cylinder 7. And the protrusion direction of the protrusion part 603 of the inner cylinder 6 inclines with respect to the direction orthogonal to the bottom part 20 of the eaves rod 2, It is characterized by the above-mentioned.

  In this connection structure, the protruding direction of the protruding portion 603 of the inner cylinder 6 can be inclined with respect to the direction orthogonal to the bottom 20 of the eaves 2. For this reason, the downstream side pipe member inclined with respect to the direction orthogonal to the bottom 20 of the eaves rod 2 can be directly connected to the outer cylinder 7 of the drain 1 without using an elbow. Therefore, the connection structure can be simple and has a good appearance. In addition, the number of members can be reduced to suppress an increase in cost, and the labor of construction can be reduced.

  In the present embodiment, the downstream pipe connected to the drain outer cylinder 7 is referred to as the caller 3, but other downstream pipes such as elbows may be connected. In the present embodiment, the outer cylinder 7 is provided with a separate spacer 8 from the outer cylinder 7. However, the spacer 8 may be omitted and the outer cylinder 7 may directly press the bottom 20 of the eaves 2. I do not care. The cross-sectional shape orthogonal to the axial direction of the inner cylinder 6 may be a perfect circle. In addition, the design may be changed as appropriate without departing from the gist of the present invention.

1 Drain 2 Eaves 3 Calling (downstream pipe)
6 Inner cylinder 7 Outer cylinder 20 Bottom part of eaves 61 Eave part 200 Drop port 600 Elliptical cylindrical part 603 Projection part of inner cylinder

Claims (2)

The bottom formed dropped port eaves gutter is inserted from above, the inner cylinder member that projects in a direction inclined with respect to a direction perpendicular to the bottom of the eaves gutter from the bottom lower surface of the eaves gutter,
An outer cylinder that is connectable to the outer peripheral side of the protruding portion that protrudes from the bottom lower surface of the eaves of the inner cylinder, and that can be connected to another downstream pipe,
The inner cylinder is
An oval cylindrical portion disposed inside the drophead;
A connecting portion formed on the lower side of the elliptical cylindrical portion;
A true cylindrical part formed on the lower side of the connection part and connected to the elliptical cylindrical part via the connection part;
A collar portion is formed on the bottom of the eaves so as to protrude to the outer peripheral side at the upper end of the elliptical cylindrical portion ,
The elliptical cylindrical portion has an elliptical cross-sectional shape orthogonal to the axial direction, and a cross-sectional shape parallel to the bottom of the eaves bowl is a perfect circle,
The true cylindrical part has a perfect circular cross-sectional shape perpendicular to the axial direction,
A male screw part is formed on the outer peripheral surface of the true cylindrical part,
On the inner peripheral surface of the outer cylindrical body, an internal thread portion that is screwed into the external thread portion is formed,
The upper end surface is in contact with the lower surface of the bottom portion of the eaves bowl, and the lower end portion further includes a cylindrical spacer that is fitted inside the outer cylindrical body,
By the bottom of the eaves gutter between the flange portion and the outer cylindrical body is sandwiched through the spacer, drain, characterized in that Ru is attached to the eaves gutters. With drain,
The drain is
An inner cylinder inserted from above into a spigot formed at the bottom of the eaves,
An outer cylinder connectable to the outer peripheral side of the protruding portion protruding from the bottom lower surface of the eaves bowl of the inner cylinder;
With a cylindrical spacer,
The inner cylinder is
An oval cylindrical portion disposed inside the drophead;
A connecting portion formed on the lower side of the elliptical cylindrical portion;
A true cylindrical part formed on the lower side of the connection part and connected to the elliptical cylindrical part via the connection part;
A flange projecting outward is formed at the upper end of the elliptical cylindrical portion,
The elliptical cylindrical portion has an elliptical cross-sectional shape orthogonal to the axial direction, and a cross-sectional shape parallel to the bottom of the eaves bowl is a perfect circle,
The true cylindrical part has a perfect circular cross-sectional shape perpendicular to the axial direction,
A male screw part is formed on the outer peripheral surface of the true cylindrical part,
A female thread portion is formed on the inner peripheral surface of the outer cylindrical body,
The eaves part is disposed on the bottom of the eaves eaves, the inner cylinder protrudes from the bottom surface of the eave eaves in a direction inclined with respect to a direction orthogonal to the eaves eaves bottom, and the female screw part is the male screw The outer cylinder is connected to the inner cylinder by being screwed into a part, the upper end surface of the spacer is in contact with the lower surface of the bottom of the eaves bowl, and the lower end of the spacer is fitted inside the outer cylinder The bottom of the eaves is sandwiched between the eaves and the outer cylinder via the spacer, the drain is attached to the eaves, and the downstream pipe is connected to the outer cylinder. Connecting structure between eaves wall and downstream pipe.

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