JP7189280B2 - Drainage members and rain gutters - Google Patents

Description

The present invention relates to a drainage member.

2. Description of the Related Art Conventionally, a drainage member for draining water from the bottom of an eaves gutter is known, as shown in Patent Document 1 below. This drainage member includes a lower cylinder fixed to the eaves gutter and having an outer cylinder part arranged below a through hole formed in the bottom part of the eaves gutter; an upper tube having an inner tube portion mounted inside the tube. The upper end portion of the inner tubular portion gradually expands in diameter from the bottom toward the top.

Japanese Patent No. 4130616

In the conventional drainage member, the upper end portion of the inner cylindrical portion gradually expands in diameter from the bottom to the upper end, and the outer diameter of the upper end portion of the inner cylindrical portion is outside the portion located below the upper end portion. larger than diameter. Since it is necessary to arrange the upper end of the inner tubular portion in the through hole of the eaves gutter, the inner diameter of the through hole is made larger than the outer diameter of the portion of the inner tubular portion located below the upper end. There is a need. Therefore, for example, when the inner cylindrical portion is inserted into the through hole from above the bottom of the eaves gutter during construction, the radial position of the inner cylindrical portion with respect to the through hole is difficult to determine. Since the upper cylinder is attached at a biased position, there is a problem such as deterioration of the water stoppage.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a drainage member that can be easily and accurately positioned in a through-hole of an eaves gutter.

In order to solve the above problems, the present invention proposes the following means.
A drainage member according to the present invention is a drainage member for draining water from the bottom of an eaves gutter, has an outer cylindrical portion disposed below a through hole formed in the bottom, and is fixed to the lower surface of the bottom. an inner cylindrical portion mounted inside the outer cylindrical portion, the upper end portion of which is disposed in the through hole, and the upper end portion of which gradually expands in diameter from bottom to top; and the inner cylindrical portion an upper cylinder extending radially outward from an upper end portion and having a mounting portion placed on the upper surface of the bottom portion; One of them is formed with an engaging portion protruding toward the other so as to be positioned in the through hole and engaged with the inner peripheral edge of the through hole.

In this case, the engaging portion is formed on either one of the lower tube and the upper end of the inner tube. Therefore, when the upper cylinder is inserted into the through-hole and attached to the lower cylinder, the engaging portion engages with the inner peripheral edge of the through-hole, thereby positioning one of the above-mentioned cylinders in the radial direction with respect to the through-hole. state. Thereby, the drainage member can be easily and accurately positioned with respect to the through hole of the eaves gutter.

Moreover, the engaging portion may be formed over the entire circumferential direction.

In this case, the engaging portion is formed over the entire circumference. Therefore, the engaging portion can be reliably engaged with the through-hole in the radial direction, and the positioning effect of the engaging portion can be remarkably achieved.

Also, the other of the upper end portions of the lower tube and the inner tube portion may be formed with a relief portion that is recessed in the vertical direction and in which the engaging portion is arranged.

In this case, since the relief portion is formed in the other of the upper ends of the lower tube and the inner tube, it is possible to avoid interference between the engaging portion and the other.

Moreover, the engaging portion may be formed at the upper end portion of the inner cylindrical portion.

In this case, since the engaging portion is formed at the upper end portion of the inner tubular portion, it is not necessary to form the engaging portion in the lower tubular portion. For this reason, when adhesive is applied to the lower cylinder and the lower cylinder is fixed to the bottom of the eaves gutter, it is easy to secure a space for excess adhesive to flow out at the inner peripheral edge of the upper end of the outer cylinder. be able to. That is, when the engaging portion is formed in the lower cylinder, the engaging portion may interfere with the flow of the excess adhesive.

The engaging portion is formed at the upper end portion of the inner cylindrical portion, and the lower pipe extends radially outward from the upper end portion of the outer cylindrical portion and is fixed to the lower surface of the bottom portion. The fixing portion is formed with an escape portion that is recessed downward and in which the engaging portion is arranged, and the vertical direction from the lower surface of the mounting portion to the lower edge of the engaging portion is formed. The distance L1, the vertical distance L2 from the upper surface of the fixing portion to the bottom surface of the relief portion, and the vertical thickness T1 of the bottom portion may satisfy the following equation (1).
L2>L1-T1 (1)

In this case, since the vertical axial sizes of the engaging portion and the relief portion and the axial thickness at the bottom of the eaves gutter satisfy the formula (1), the lower tube and the upper tube are connected to the eaves gutter. When attached to the bottom, it is possible to reliably avoid mutual interference between the engaging portion and the relief portion.

ADVANTAGE OF THE INVENTION According to this invention, a drainage member can be positioned easily and correctly with respect to the through-hole of an eaves gutter.

1 is an external view of a rain gutter provided with a drainage member according to one embodiment of the present invention; FIG. FIG. 2 is a longitudinal sectional view of the drainage member shown in FIG. 1; Fig. 2 is a longitudinal sectional view showing a state before the drainage member shown in Fig. 1 is attached to the eaves gutter; FIG. 3 is a longitudinal sectional view showing a state in which a swirl prevention member is attached to the drainage member shown in FIG. 2; FIG. 5 is an external view of the eddy current prevention member shown in FIG. 4; FIG. 3 is a vertical cross-sectional view showing a state in which another type of eddy current prevention member is attached to the drainage member shown in FIG. 2 ; FIG. 7 is an external view of the eddy current prevention member shown in FIG. 6; FIG. 3 is a longitudinal sectional view showing a state in which a cover is attached to the drainage member shown in FIG. 2; FIG. 9 is an external view of the cover shown in FIG. 8;

A drainage member 1 according to an embodiment of the present invention will be described below with reference to the drawings.
As shown in FIG. 1, the drainage member 1 according to the present embodiment has a high drainage function. It is provided inside the eaves gutter 51 to be arranged.

As shown in FIG. 1, the rain gutter 50 is connected to an eaves gutter 51 extending along the edge of the eaves and a circular through-hole 51b (see FIG. 2) formed in the bottom 51a of the eaves gutter 51 via a gutter 52. and a connected downspout 53 .
When a plurality of through-holes 51b are provided, the interval between the through-holes 51b is 30 m or less. Moreover, when one through-hole 51b is provided, the distance from the end (stop) of the eaves gutter 51 to the through-hole 51b is 15 m or less.
The area of the through hole 51b is 5 cm ² to 300 cm ² , preferably 13 to 190 cm ² , more preferably 20 to 140 cm ² .

The gutter 52 horizontally guides the rainwater W flowing down from the drainage member 1 provided in the eaves gutter 51, and one end side is connected to the lower end of the drainage member 1 by a first elbow 54, and the other end side is a second elbow. It is connected by 55 to the upper end of the downpipe 53 .
The elbows 54 and 55 are not limited to such an embodiment, and may be 135° elbows instead of 90° elbows. May be directly connected.
The horizontal distance of the gutter 50 is 1.5 m or less, preferably 1 m or less. Here, the horizontal distance of the rain gutter 50 refers to the horizontal distance including the nominal gutter 52 from the center of the through-hole 51b to the center axis of the downpipe 53 .

The downspout 53 is arranged vertically along the outer wall P of the building, and the lower end of the downspout 53 is connected to a drainage pipe (not shown) buried underground. Thus, rainwater flowing down from the eaves of the roof is received by the eaves gutter 51 and drained to the drain pipe side through the call gutter 52 and the vertical gutter 53. - 特許庁
The height of the downpipe 53 is 2 m or more, preferably 3 m or more. Here, the height of the downpipe 53 refers to the vertical distance to the connecting portion with the second elbow 55 when the rain gutter 50 has the call gutter 52 . In addition, when the rain gutter 50 does not have the call gutter 52, it indicates the vertical distance to the connecting portion with the drainage member 1. As shown in FIG.

The eaves gutter 51 is an extruded product of hard vinyl chloride resin, ABS, AES, or other synthetic resin, and has a groove-shaped cross section.
The eaves gutter 51 is suspended by a gutter hanger (not shown) attached to a fascia plate (not shown) to receive rainwater flowing down from the eaves of the roof.

The eaves gutter 51 preferably has a coefficient of linear expansion of 2.0×10 ⁻⁵ /° C. or less in order to prevent expansion and contraction due to heat. In addition, a low-stretch sheet such as a PET resin sheet or an iron sheet stretched to the center of the eaves gutter 51 in the thickness direction may be inserted, or the synthetic resin itself constituting the eaves gutter 51 may contain wollastonite, carbon fiber, or the like. The coefficient of linear expansion may be reduced by blending additives with low elasticity.
The material of the eaves gutter 51 is not limited to the synthetic resin material, and may be, for example, an extruded product of a metal material.

The drainage member 1 shown in FIG. 2 has a high drainage function of draining the rainwater W (see FIG. 1) that has flowed into the eaves gutter 51 during heavy rain from the bottom portion 51a of the eaves gutter 51. The drainage performance is 0.25 L/sec·cm ² or more, preferably 0.30 L/sec·cm ² or more.
As shown in FIG. 2 , the drainage member 1 includes a lower tube 10 fixed to the lower surface of the bottom portion 51 a and an upper tube 20 attached to the lower tube 10 . The lower cylinder 10 and the upper cylinder 20 are arranged on a common axis extending in the vertical direction.

This common axis will be referred to as a central axis O hereinafter. In a plan view of the drainage member 1 viewed from above and below, the direction perpendicular to the center axis O is called the radial direction, and the direction around the center axis O is called the circumferential direction.

The lower cylinder 10 and the upper cylinder 20 are injection molded products of synthetic resin such as rigid vinyl chloride resin, polycarbonate, ABS, and AES. In addition, the lower cylinder 10 and the upper cylinder 20 are not limited to the synthetic resin material, and may be formed of a cast iron material using a mold. Also, the upper cylinder 20 and the lower cylinder 10 may be made of different materials.

The lower cylinder 10 includes an outer cylinder portion 11 arranged below the through hole 51b of the bottom portion 51a, and a fixing portion extending radially outward from the upper end portion of the outer cylinder portion 11 and fixed to the lower surface of the bottom portion 51a. 12 and .
The outer tubular portion 11 has a cylindrical shape and is arranged coaxially with the central axis O. As shown in FIG. The fixed portion 12 has a circular shape in a plan view viewed from the top and bottom, and is arranged coaxially with the central axis O. As shown in FIG.

The outer cylindrical portion 11 includes a large-diameter portion 11A forming the upper end portion of the outer cylindrical portion 11, and a small-diameter portion 11B connected to the lower end portion of the large-diameter portion 11A and having a smaller diameter than the large-diameter portion 11A. there is The large diameter portion 11A and the small diameter portion 11B are arranged coaxially with the central axis O. As shown in FIG.
The vertical dimension of the large diameter portion 11A is smaller than the vertical dimension of the small diameter portion 11B.

The upper end portion of the large diameter portion 11A forms the upper end portion of the outer tubular portion 11 . The upper end portion of the large diameter portion 11A gradually increases in diameter from the bottom toward the top.
In the illustrated example, the upper end portion of the large-diameter portion 11A has a curved bell mouth shape. The upper end portion of the large-diameter portion 11A protrudes radially inward in a vertical cross-sectional view (cross section along the vertical direction).

The upper end portion of the large diameter portion 11A may have a tapered shape. The radius of curvature of the upper end portion of the large diameter portion 11A in a vertical cross-sectional view (cross section along the vertical direction) is, for example, 3 mm or more and 45 mm or less, preferably 5 mm or more and 45 mm or less.
A first elbow 54 is fitted to the small diameter portion 11B. The outer peripheral surfaces of the small diameter portion 11B and the first elbow 54 are flush with each other in the radial direction without steps. A female screw portion 11C extending in the circumferential direction is formed on the inner peripheral surface of the small diameter portion 11B. The female threaded portions 11C are provided at intervals (intermittently) over the entire circumference in the circumferential direction.

The upper cylinder 20 extends radially outward from the inner cylinder portion 21 mounted inside the outer cylinder portion 11 and the upper end portion of the inner cylinder portion 21, and is placed on the upper surface of the bottom portion 51a. 22.
The inner cylindrical portion 21 has a cylindrical shape and is arranged coaxially with the central axis O. As shown in FIG. The mounting portion 22 has a circular shape in a plan view viewed from above and is arranged coaxially with the central axis O. As shown in FIG. Adhesive is applied to the lower surface of the mounting portion 22 and fixed to the upper surface of the bottom portion 51 a of the eaves gutter 51 .

The upper end portion of the inner cylinder portion 21 is arranged in the through hole 51b and gradually expands in diameter from the bottom toward the top. In the illustrated example, the upper end portion of the inner cylindrical portion 21 has a curved bellmouth shape.
The upper end portion of the inner tubular portion 21 protrudes radially inward in a vertical cross-sectional view (cross section along the vertical direction). In addition, the upper end portion of the inner tubular portion 21 may be tapered.

The radius of curvature of the upper end portion of the inner cylindrical portion 21 in a vertical cross-sectional view (cross section along the vertical direction) is, for example, 5 mm or more and 50 mm or less, preferably 8 mm or more and 45 mm or less, more preferably 10 mm or more and 40 mm or less, and 13 mm or more and 30 mm or less. is more preferred.
A male threaded portion 21A is formed on the outer peripheral surface of the lower end portion of the inner tubular portion 21 to be attached to the female threaded portion 11C. The male threaded portion 21A is provided continuously over the entire circumference in the circumferential direction.

In the present embodiment, one of the upper end portions of the lower cylinder 10 and the inner cylinder portion 21 protrudes toward the other so as to be positioned within the through hole 51b. An engaging portion 23 that engages with is formed. In the illustrated example, the engaging portion 23 is formed at the upper end portion of the inner tubular portion 21 and protrudes toward the lower tubular portion 10 .

The engaging portion 23 is formed continuously on the upper end portion of the inner tubular portion 21 over the entire circumferential direction. As a result, the thickness of the upper tube 20 is thicker at the upper end portion of the inner tube portion 21 than at other portions. It should be noted that the engagement portions 23 are not limited to such an aspect, and a plurality of engaging portions 23 may be formed at intervals in the circumferential direction, or may be formed at two points in the circumferential direction. By forming the engaging portions 23 at intervals, the surplus adhesive applied to the mounting portion 22 is allowed to pass through the through holes 51b from between the plurality of engaging portions 23 to the inner tubular portion 21 and the lower tubular portion. You can escape between ten.

The engaging portion 23 protrudes radially outward from the outer peripheral surface of the upper end portion of the inner tubular portion 21 . The engaging portion 23 is formed continuously over the entire circumferential direction as described above, and is formed in an annular shape having an outer diameter substantially equal to the inner diameter of the through hole 51b. The outer diameter of the engaging portion 23 is preferably smaller than the inner diameter of the through hole 51b. With this configuration, the surplus adhesive applied to the mounting portion 22 is allowed to flow between the inner cylinder portion 21 and the lower cylinder 10 through the gap between the engaging portion 23 and the through hole 51b and through the through hole 51b. can escape to
The engaging portion 23 includes an outer peripheral surface 23a facing radially outward and a lower end surface 23b (lower edge) facing downward.

The outer peripheral surface 23a extends in the vertical direction, and the lower end surface 23b extends in the radial direction. The outer peripheral surface 23a and the lower end surface 23b intersect to form a right angle. The outer peripheral surface 23 a forms a stepped portion that connects the lower surface of the mounting portion 22 and the lower end surface 23 b of the engaging portion 23 . A radially inner end portion of the lower end surface 23b is connected to the outer peripheral surface of the inner cylindrical portion 21 via a curved surface. The curved surface gradually extends radially inward as it goes downward, forming a radially inward protrusion when viewed in longitudinal section.
The outer peripheral surface 23a and the lower end surface 23b do not have to intersect to form a right angle, and may intersect with the outer peripheral surface 23a and the lower end surface 23b at an angle larger than 90°. It may have a curved surface or a tapered surface.

Also, the other of the upper end portions of the lower tube 10 and the inner tube portion 21 is formed with a relief portion 13 in which a depression engaging portion 23 is arranged in the vertical direction.
In the illustrated example, the relief portion 13 is formed in the fixing portion 12 of the lower cylinder 10 . The relief portion 13 is recessed downward and is formed in the fixing portion 12 over the entire circumferential direction.

An application portion 14 to which an adhesive is applied is formed on the outer peripheral portion of the fixing portion 12 . The application portion 14 is recessed downward on the upper surface of the outer peripheral edge portion of the fixing portion 12 and is formed over the entire circumferential direction. The application portion 14 is arranged adjacent to the relief portion 13 on the radially outer side.
In addition, it is not limited to such an aspect, and the application part 14 may be formed in multiple numbers at intervals in the circumferential direction.

Here, as shown in FIG. 3, the vertical distance L1 from the lower surface of the mounting portion 22 to the lower edge of the engaging portion 23 (the lower edge at the radially outer end portion of the engaging portion 23) A vertical distance L2 from the top surface of the portion 12 to the bottom surface of the relief portion 13 and a vertical thickness T1 of the bottom portion 51a satisfy the following equation (1).
L2>L1-T1 (1)
Note that the distance L2 is not limited to such a mode, and the distance L2 may satisfy the following formula (2).
T1>L2≧T1/2 (2)

Moreover, the vertical distance L1 from the lower surface of the mounting portion 22 to the lower edge of the engaging portion 23 is preferably larger than half the vertical thickness T1 of the bottom portion 51a. The vertical thickness T1 of the bottom portion 51a is, for example, 1.0 mm or more and 4.0 mm or less, preferably 1.5 mm or more and 3.5 mm or less.
A vertical distance L4 from the top surface of the fixing portion 12 to the bottom surface of the application portion 14 is less than half the vertical distance L2 from the top surface of the fixing portion 12 to the bottom surface of the relief portion 13 .

Next, a method for attaching the drainage member 1 to the eaves gutter 51 will be described.
First, the bottom portion 51a of the eaves gutter 51 is formed with a through hole 51b. At this time, the inner diameter of the through-hole 51b can be set based on the outer diameter of the outer peripheral surface 23a of the engaging portion 23 of the inner cylindrical portion 21 .

Next, the lower cylinder 10 and the upper cylinder 20 are separately arranged at positions sandwiching the through hole 51b in the vertical direction. Then, the inner cylinder portion 21 of the upper cylinder 20 is inserted into the through hole 51b, and the engaging portion 23 at the upper end portion of the inner cylinder portion 21 is arranged inside the through hole 51b. Engage radially. At the same time, an adhesive is applied to the lower surface of the mounting portion 22 and fixed to the upper surface of the bottom portion 51 a of the eaves gutter 51 .

Next, an adhesive is applied to the application portion 14 of the fixing portion 12 of the lower cylinder 10 . Then, the outer cylinder portion 11 of the lower cylinder 10 is attached to the inner cylinder portion 21 of the upper cylinder 20 . At this time, the upper surface of the fixing portion 12 is brought into contact with the lower surface of the bottom portion 51 a of the eaves gutter 51 .
Here, the excessive adhesive flows inside from the relief part 13, and the adhesive is prevented from leaking out from the upper surface of the fixing part 12 to the outside in the radial direction and affecting the appearance of the drainage member 1. - 特許庁can be done.

Next, the action of the drainage member 1 will be described.
When a large amount of rainwater W flows into the eaves gutter 51 in the state shown in FIG. As a result, a siphon phenomenon occurs, and a large amount of rainwater W is drained from the eaves gutter 51 by the drain member 1. - 特許庁
At this time, since the upper end portion of the inner cylindrical portion 21 gradually expands in diameter from the bottom to the top, the increase in the flow velocity of the rainwater W due to the siphon phenomenon is not hindered, and a large amount of the rainwater W is drained by the drain member. 1 can be drained.

By the way, when the rainwater W flows into the eaves gutter 51 through the opening (the opening at the upper end of the inner cylindrical portion 21), a vortex is generated and air is easily sucked. If air is sucked in, the drainage reverts to gravity drainage.
Therefore, in order to stably continue the occurrence of the siphon phenomenon, eddy current prevention members 5 and 6 as shown in FIGS.

As shown in FIGS. 4 and 5, the swirl prevention member 5 includes a cylinder 5a and a grid-like partition plate 5b arranged inside the cylinder 5a. The outer diameter of the cylinder 5a is substantially the same as the inner diameter of the inner cylinder portion 21 of the upper cylinder 20. As shown in FIG.
In particular, when the eddy current prevention member 5 having an axial length of the cylinder 5a of 50 mm or more (for example, about 50 to 200 mm) and an opening ratio of 70% or more is internally fitted to the inner cylindrical portion 21, The grid-like partition plate 5b prevents the vortex flow and rectifies it, so that a large amount of rainwater quickly flows down the inner cylindrical portion 21 in a full flow state without sucking air, which is preferable.

If the length of the cylinder 5a is shorter than 50 mm, the eddy current prevention action and rectifying action will be insufficient, and if the opening ratio is lower than 70%, the amount of rainwater flowing into the inner cylindrical portion 21 will decrease, resulting in poor drainage capacity. Both cases are undesirable because they lead to deterioration.
Instead of the eddy current prevention member 5, a cylinder having a length of 50 mm or longer and having an outer diameter substantially equal to the inner diameter of the inner cylindrical portion 21 is provided with a large number of holes parallel to its center line. A swirling prevention member having an opening ratio of 70% or more can also be used favorably.

As shown in FIGS. 6 and 7, the eddy current prevention member 6 of another form has a notch 6b having a shape corresponding to the bellmouth shape of the drop opening of the eaves gutter 51 in the lower part of the cross plate 6a. It is what I did.
When the lower portion of the vortex-preventing member 6 is inserted into the upper end portion of the inner cylindrical portion 21 and attached, generation of a vortex is reliably prevented by the cross plate 6a of the vortex-preventing member 6 before the rainwater flows into the drop opening. . As a result, the siphon phenomenon is stably generated without the intake of air due to the swirling current.

In addition, as shown in FIGS. 8 and 9, it is also effective to provide the cover 7 so as to cover the drop opening in order to prevent air from being sucked into the inner cylinder portion 21 .
The cover 7 has a square shape when viewed from above. Inflow ports 7 a are formed in the lower portions of the four side surfaces of the cover 7 .

When the cover 7 is installed, when the water surface of the rainwater W inside the eaves gutter 51 becomes higher than the inflow port 7a, the cover 7 isolates the drain port from the atmosphere, so that air is not drawn in from the drain port. prevented.
In particular, when the surface of the rainwater rises and the cover 7 is submerged in water, the cover 7 completely blocks the air passage from the atmosphere to the outlet due to the eddy current, so that the air intake prevention effect is remarkably exhibited. The siphon phenomenon occurs extremely stably.
Of course, instead of the cover 7, a circular dome-shaped cover having an inlet formed around the lower portion thereof can be used.

As described above, according to the drainage member 1 according to this embodiment, the engaging portion 23 is formed at the upper end portion of the inner cylindrical portion 21 . Therefore, when the upper cylinder 20 is inserted into the through-hole 51b and attached to the lower cylinder 10, the engaging portion 23 engages with the inner peripheral edge of the through-hole 51b, so that the upper end portion of the inner cylinder portion 21 is It is positioned in the radial direction with respect to the through hole 51b. Thereby, the drainage member 1 can be easily and accurately positioned with respect to the through hole 51 b of the eaves gutter 51 .

Moreover, the engaging portion 23 is formed over the entire circumferential direction. Therefore, the engaging portion 23 can be reliably engaged with the through-hole 51b in the radial direction, and the positioning effect of the engaging portion 23 can be remarkably exhibited.
Further, since the relief portion 13 is formed in the fixing portion 12 of the lower cylinder 10, it is possible to avoid the engaging portion 23 and the fixing portion 12 from interfering with each other.

Moreover, since the engaging portion 23 is formed at the upper end portion of the inner cylindrical portion 21 , it is not necessary to form the engaging portion 23 on the outer cylindrical portion 11 . Therefore, when adhesive is applied to the lower tube 10 and the outer tube portion 11 is fixed to the bottom portion 51a of the eaves gutter 51, excess adhesive flows out to the inner peripheral edge portion of the upper end portion of the outer tube portion 11. Space can be easily secured. That is, when the engaging portion 23 is formed in the lower cylinder 10, the engaging portion 23 may interfere with the excess adhesive from flowing out.

Further, the vertical axial sizes of the engaging portion 23 and the relief portion 13 and the axial thickness of the bottom portion 51a of the eaves gutter 51 satisfy the formula (1). Therefore, when the lower cylinder 10 and the upper cylinder 20 are attached to the bottom portion 51a of the eaves gutter 51, it is possible to reliably prevent the engaging portion 23 and the relief portion 13 from interfering with each other.

The technical scope of the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention.

For example, in the above-described embodiment, the engaging portion 23 is formed at the upper end portion of the inner tubular portion 21, and the relief portion 13 is formed at the lower tubular portion 10, but the present invention is not limited to this aspect. . For example, the engaging portion 23 may be formed on the lower tube 10 and the relief portion 13 may be formed on the upper end portion of the inner tube portion 21 .

Specifically, the engaging portion formed on the lower cylinder 10 includes an outer peripheral surface that faces the radially outer side of the lower cylinder 10 and extends along the vertical direction, and an outer peripheral surface that faces upward and extends along the radial direction of the lower cylinder 10. an extending upper end surface, the outer peripheral surface and the upper end surface intersect so as to form a substantially right-angled cross section, and the outer peripheral surface forms a stepped portion connecting the upper surface of the applying portion 14 and the upper end surface of the engaging portion. there is
In such a case, the upper cylinder 20 may be attached to the lower cylinder 10 after the engaging portion 23 of the lower cylinder 10 is engaged with the inside of the through hole 51b. Thereby, the upper tube 20 can be positioned on the eaves gutter 51 via the lower tube 10 .

Moreover, in the above-described embodiment, the configuration in which the relief portion 13 is formed in the fixing portion 12 of the lower cylinder 10 is shown, but the configuration is not limited to this. The relief portion 13 may not be formed in the fixing portion 12 of the lower cylinder 10 . In such a case, the engagement portion 23 may be arranged inside the large diameter portion 11A of the outer cylinder portion 11 of the lower cylinder 10 .

In addition, it is possible to appropriately replace the constituent elements in the above-described embodiment with well-known constituent elements without departing from the spirit of the present invention, and the modifications described above may be combined as appropriate.

Reference Signs List 1 drainage member 10 lower cylinder 11 outer cylinder part 12 fixing part 13 relief part 20 upper cylinder 21 inner cylinder part 22 mounting part 23 engaging part 51 eaves gutter 51a bottom part 51b through hole

Claims (3)

A drainage member for draining water from the bottom of an eaves gutter,
a lower cylinder fixed to the lower surface of the bottom, having an outer cylinder disposed below the through-hole formed in the bottom;
an inner cylindrical portion that is mounted inside the outer cylindrical portion, has a male threaded portion formed on the outer surface, has an upper end disposed in the through hole, and has an upper end that gradually expands in diameter from bottom to top; and the inner side. an upper cylinder extending radially outward from the upper end of the cylinder and having a mounting portion placed on the upper surface of the bottom;
The outer tubular portion has a large-diameter portion forming an upper end portion of the outer tubular portion and a small-diameter portion connected to a lower end of the large-diameter portion,
having a step at a connection portion between the large diameter portion and the small diameter portion;
A female threaded portion extending in the circumferential direction and fitted to the male threaded portion of the inner cylindrical portion is formed on the inner peripheral surface of the small diameter portion,
An elbow or a downpipe can be connected to the small diameter portion,
The size of the large diameter portion in the vertical direction is smaller than the size of the small diameter portion in the vertical direction,
A notch is provided at the lower end of the small diameter portion,
Either one of the lower tube and the upper end of the inner tube protrudes toward the other so as to be positioned within the through hole, and engages with the inner peripheral edge of the through hole. A drainage member characterized in that a part is formed. The engaging portion is formed at an upper end portion of the inner cylindrical portion,
the vertical distance from the lower surface of the mounting portion to the lower edge of the engaging portion is greater than the thickness of the bottom of the eaves gutter;
The drainage member according to claim 1, wherein the engaging portion is arranged inside the large diameter portion. Eaves gutter and
The drainage member according to claim 1 or 2, which is arranged in a through hole provided in the bottom of the eaves gutter;
a downpipe drained from the drainage member;
gutter with

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